Initial revision

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@14764 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 8063 insertions, 0 deletions

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+Fri Jul 19 18:56:14 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* cse.c (canon_reg): Allow for recursive call returning 0 (if we had
+	an EXPR_LIST).
+	* sched.c (init_aliases_analysis): Ignore REG_EQUAL note when its value
+	is an EXPR_LIST.
+	* unroll.c (loop_iterations): Likewise.
+
+	* rs6000.md (andsi3): Fix typo in and-with-cc pattern.
+
+Fri Jul 19 11:23:22 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* toplev.c (set_target_switch): For TARGET_OPTIONS, set the
+	variable to the variable part of the actual option.
+	* tm-m88k.h, out-m88k.c: Change the use of m88k_short_data.
+
+	* varasm.c (output_constant_def): Merge get_or_assign_label and
+	delete it.  Ensure that ENCODE_SEGMENT_INFO is evaluated before
+	SELECT_SECTION.
+
+Thu Jul 18 19:57:45 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* expr.h (MUST_PASS_IN_STACK_BAD_PADDING): Definitions were backwards.
+
+Thu Jul 18 17:52:46 1991  Jim Wilson  (wilson at wookumz.gnu.ai.mit.edu)
+
+	* unroll.c: Fix typos in comments.
+	(splittable_regs_updates): New static global variable.
+	Indicates the number of instructions that modify a split biv
+	remaining during the last iteration of a loop, so that the last one
+	can be handled specially.
+	(unroll_loop): Allocate and clear it.
+	(copy_loop_body): Use it to determine how to rewrite an insn
+	modifying a split iv.
+	(find_splittable_regs): When a splittable biv is identified, set it
+	equal to the number of insn modifying the biv.
+	(find_splittable_givs): When a splittable giv is identified, set
+	it to one if this giv is a reg.
+	
+	* unroll.c (copy_loop_body): Instead of trying to special case
+	insns that use start_label, use the label_map to map the start
+	label to the appropriate label for all insns except those that
+	must be inverted and redirected.  The former code did not handle
+	tablejumps that used the start_label correctly.
+
+	* integrate.c (copy_rtx_and_substitute): Don't legitimize an
+	address inside of an ADDRESS rtx.  This fails, because this need
+	not be a validate address, but it is always valid in the context
+	it appears in.
+
+Thu Jul 18 08:13:56 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* toplev.c (set_target_switch): Support TARGET_OPTIONS for command
+	options with values.
+
+	* varasm.c (output_constant_def): Set flags with
+	ENCODE_SEGMENT_INFO for strings and constructors.
+	* tm-mips.h (ENCODE_SEGMENT_INFO): Must be a VAR_DECL.
+
+	* out-m88k.c, tm-m88k.h, m88k.md: Implement a global pool approach
+	to short addressing.
+
+	* m88k.md (extendsfdf2, truncdfsf2): Use fsub rather than fadd.
+	This conforms to IEEE 754 in all rounding modes except round to
+	negative infinity whereas fadd conforms only in that mode.
+
+Thu Jul 18 01:01:37 1991  Eric Youngdale (youngdale at v6550c.nrl.navy.mil)
+
+	* make-cc1.com: Add command line to compile reg-stack.c, and add
+	reg-stack.obj to the list of files passed to the VMS linker.
+
+Thu Jul 18 00:11:00 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* Makefile.in (enquire.o): Need not depend on gnulib.
+	(gnulib2): Renamed from gnulib2.portable.
+	Don't do ranlib.
+	(gnulib2.portable): Just refers to gnulib2.
+	(gnulib1.portable): Don't do ranlib.
+
+Wed Jul 17 11:19:09 1991  Michael Meissner  (meissner at geech.gnu.ai.mit.edu)
+
+	* Makefile.in (gcc): Do a -dumpspecs after building gcc so that -B./
+	will override any installed specs in /usr/local/lib.
+	(mostlyclean): Delete *.cpp files which are left if you use
+	-save-temps.
+
+Wed Jul 17 06:08:33 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* combine.c (try_combine): When putting I2 and/or I1 into NEWPAT,
+	check for a PARALLEL; if so, just put in the relevant SET instead
+	of making a PARALLEL containing a PARALLEL.
+
+Tue Jul 16 18:58:51 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* combine.c (record_value_for_reg): Show we haven't seen the death
+	of a register once we have seen it modified.
+
+	* reload1.c (reload): If we decide to put a pseudo which used to have
+	a MEM equiv onto the stack, set SOMETHING_CHANGED and reprocess all
+	eliminations and pseudos without scanning the insns.
+
+Tue Jul 16 13:17:14 1991  Michael Meissner  (meissner at wookumz.gnu.ai.mit.edu)
+
+	* cplus-decl.c (sigsegv): Make signal handler void for full
+	prototyping systems.
+
+Tue Jul 16 12:25:18 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* dbxout.c (dbxout_symbol): Ignore types with no names of any kind.
+
+Tue Jul 16 07:12:52 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* stmt.c (pushcase, pushcase_range): Return label in *DUPLICATE,
+	not integer value.
+
+	* rtlanal.c (reg_referenced_p, reg_overlap_mentioned_p): Allow X to
+	be (cc0) or (pc).
+
+	* combine.c (subst, case SET): Delete code to remove "unnecessary"
+	SUBREG; code was incorrect and this is done (corrected below) in
+	simplify_comparison.
+	(simplify_comparison): Can only remove SUBREG for equality comparisons.
+
+	* expr.c (expand_expr, case COND_EXPR): If condition has side effects,
+	ensure we evaluate it before evaluating an arm of the COND_EXPR.
+
+Mon Jul 15 21:59:36 1991  James Van Artsdalen  (james at bigtex.cactus.org)
+
+	* rtl.h (FUNCTION_FLAGS_RETURNS_STRUCT): Fix typo in value.
+
+Mon Jul 15 22:18:40 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* cccp.c (main): Ignore CPATH if -nostdinc.
+
+Mon Jul 15 22:00:02 1991  Michael Meissner  (meissner at churchy.gnu.ai.mit.edu)
+
+	* reload.c (find_reloads): Fix typo (reg_sets_p instead of
+	reg_set_p).
+
+Mon Jul 15 21:49:09 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* c-parse.y (stmt): Emit the nop for the start of a loop
+	only after the line number.
+
+Mon Jul 15 16:50:51 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edn)
+
+	* rtlanal.c (reg_set_p): If we are passed an insn, only pass the
+	pattern to note_stores.
+
+	* local-alloc.c (validate_equiv_mem): A CALL_INSN invalidates all
+	memory.
+
+Sun Jul 14 06:34:47 1991  Richard Kenner  (kenner at vlsi1.ultra.hyu.edu)
+
+	* cse.c (last_jump_equiv_class): New variable.
+	(record_jump_equiv): Set it.
+	(cse_insn): Clear it.
+	(cse_around_loop): Invalidate all entries in last_jump_equiv_class.
+	(cse_set_around_loop): Ensure our replacement is cheaper.
+
+Sat Jul 13 17:15:30 1991  James Van Artsdalen  (james at bigtex.cactus.org)
+
+	* cplus-decl.c (finish_enum): Fix typo in arguments for finish_decl.
+	* cplus-class.c (finish_struct): Likewise.
+
+Fri Jul 12 16:45:02 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* dbxout.c (dbxout_symbol): Don't crash when DECL_NAME is 0.
+
+Fri Jul 12 15:38:24 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* expr.c (do_tablejump): Don't write BARRIER between jump and table
+	if they must remain adjacent.
+
+	* varasm.c (make_decl_rtl): Set REG_USERVAR_P when register name
+	is specified.
+	* integrate.c (subst_constants): Don't substitute for a user
+	variable assigned to a hard register.
+
+	* reload.c (find_reloads): Add new vars no_{input,output}_reloads to
+	indicate when the corresponding reload type is not permitted; reject
+	an alternative that would try such a reload.
+	* rs6000.md (decrement-and-branch): No longer need kludges to
+	avoid output reloads.
+	Use '0' instead of 'c' for input 1 in alternative 0.
+	Allow operand 0 to be in non-general register.
+	
+Fri Jul 12 10:54:39 1991  James Van Artsdalen  (james at bigtex.cactus.org)
+
+	* c-decl.c (finish_struct, finish_enum): Fix typo in arguments for
+	finish_decl.
+
+	* i386.md (bit test patterns): Delete bit tests using implicitly
+	masked bit number operand: the hardware doesn't work like that.
+
+Fri Jul 12 09:50:43 1991  Michael Meissner  (meissner at spiff.gnu.ai.mit.edu)
+
+	* tm-hp9k2bsd.h (toplevel): Remove RCS HISTORY log.
+
+Thu Jul 11 00:46:48 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* c-parse.y (yylex): Do try signed int for ANSI nondecimal constants.
+
+	* c-typeck.c (record_format_info): The first time, use xmalloc.
+
+Wed Jul 10 18:54:26 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* jump.c (jump_optimize): Fix typo in "if (...) x = a; else x = b;"
+	case: had temp3 instead of temp4.
+
+	* cplus-lex.c (lineno, end_of_file): Move definition to before
+	first use.
+	(reinit_parse_for_block): Variable `c' must be int to ensure EOF fits.
+	* cplus-input.c (getch): Remove extraneous declaration of end_of_file.
+
+	* reload1.c: Include insn-flags.h.
+	(emit_reload_insns): Handle the case where we reload an entire
+	address; use "reload_load_address" pattern, if it exists.
+	Remove explicit SImode reference; should have been Pmode, but
+	IN can be used instead of rebuilding it.
+	* Makefile.in (reload1.o): Includes insn-flags.h.
+
+	* reload.c (find_reloads): If replacing an output REG with a MEM,
+	write a CLOBBER for the REG after the insn.
+	* reload1.c (eliminate_regs): Add new arg INSN; if nonzero, add a
+	CLOBBER when replacing a REG in SET_DEST with a MEM.
+	(reload, eliminate_regs_in_insn): Add new arg to eliminate_regs.
+	* dwarfout.c (output_bound_representation, location_attribute):
+	Likewise.
+	
+	* reload1.c (reload): If a reg_equiv_memory_loc isn't strictly valid
+	and isn't sufficiently simple, use a stack slot instead.
+	(alter_regs): Don't delete reg_equiv_init insns here.
+	(reload_as_needed): Do it here.
+
+	* stor-layout.c (get_best_mode): Correct test for alignment.
+
+	* loop.c (move_movables): Don't get confused by NOTE insns in gnulib
+	call sequence.
+
+Wed Jul 10 18:40:32 1991  Matthew Self  (mself at geech.gnu.ai.mit.edu)
+
+	* cccp.c (enum node_type):  Added T_WARNING.
+
+	* cccp.c (directive_table):  Added #warning.
+
+	* cccp.c (do_warning):  Print warning message and continue.
+
+Wed Jul 10 18:38:28 1991  Matthew Self  (mself at geech.gnu.ai.mit.edu)
+
+	* c-parse.y, objc-parse.y (attrib):  Pass "format" attribute
+	through.  Takes one identifier and two constants as args.
+	identifier must be either printf or scanf.
+
+	* c-common.c (decl_attributes):  Process "format" attributes.
+	Call new routine record_format_info().
+
+	* c-typeck.c (struct function_info):  Changed function_ident field;
+	store identifier node rather than char * to speed lookup.
+	Renamed arg_num field to format_num.  Replaced is_varargs field
+	with new first_arg_num field.
+
+	* c-typeck.c (check_format):  Modified to use new arg_num and
+	first_arg_num fields.
+
+	* c-typeck.c (record_format_info):  New routine.  Replaces static
+	table of functions to check.
+
+	* cplus-typeck.c (record_format_info):  New stub routine so c++
+	will link.  Someone should implement format checking for c++.
+
+	* c-typeck.c (init_format_info_table):  New routine to add
+	entries for ANSI functions to table.
+
+	* c-decl.c (init_decl_processing):  Call init_format_info_table().
+
+	* c-typeck.c (build_function_call):  Modified to use dynamic table
+	rather than static one.  Compare identifier nodes rather than
+	using strcmp().
+
+	* gcc.texinfo ():  Document "format" attribute.
+
+	* c-typeck.c (check_format):  Call warning() directly rather than
+	returning the warning string.  This way we can give multiple warnings
+	by continuing.  Several changes to make continuing safe.
+
+	* c-typeck.c (build_function_call):  Incorporated changed return
+	value of check_format().
+
+	* c-typeck.c (check_format):  Check for NULL format string.
+
+Wed Jul 10 16:40:54 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* sdbout.c (sdbout_tags): Delete this and use the TYPE_DECL
+	representation of tagged types.  Types are now output in their
+	original lexical order.
+	(sdbout_symbol): Return early (only using sdbout_one_type) when a
+	tagged type is encountered.
+	(sdbout_block, sdbout_symbol): Don't use sdbout_tags.
+	* toplev.c (compile_file): Don't use sdbout_tags.
+	* varasm.c (assemble_function): Don't use sdbout_tags.
+
+Wed Jul 10 15:13:33 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* dbxout.c (dbxout_tags): Function deleted.  Calls deleted too.
+	(dbxout_tagged_type): New function.
+	(dbxout_symbol): Call that.
+	* toplev.c (compile_file): Call to dbxout_tags deleted.
+
+	* c-parse.y (yylex): Simplify choice of type for integers.
+	When traditional, all integers are signed unless explicitly unsigned.
+
+Wed Jul 10 13:35:27 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* configure (m88k-svr4): Needs make-m88ksvr4.
+	* make-m88ksvr4: New file.
+
+Wed Jul 10 13:18:03 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* c-decl.c (duplicate_decls): Warn if `inline' is not consistent.
+
+	* cccp.c (hack_vms_include_specification): Fix typos.
+
+Tue Jul  9 22:21:22 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* loop.c (find_and_verify_loops): RETURN insns aren't listed in
+	loop_number_exit_labels, so don't try to remove JUMP_LABEL of a
+	RETURN from that list.
+
+	* rtlanal.c (reg_referenced_between_p): New function.
+	* jump.c (jump_optimize): Use it instead of reg_used_between_p when
+	checking for "if (...) x = a; else x = b;" case.
+
+Tue Jul  9 13:03:53 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* expr.c (move_block_to_reg): Don't force_const_mem on non-constant.
+
+Tue Jul  9 09:13:32 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* c-decl.c (finish_struct): Record tagged types as a TYPE_DECL
+	with a NULL DECL_NAME.
+	(finish_enum): Ditto.
+	* cplus-decl.c (finish_enum): Ditto.
+	* cplus-class.c (finish_struct): Ditto.
+
+	* dbxout.c (dbxout_symbol): Ignore TYPE_DECLs for tagged types.
+	* cplus-dbxout.c (dbxout_symbol): Ditto.
+	* sdbout.c (sdbout_symbol): Ditto.
+
+	* toplev.c (compile_file): DECL_NAME may be null.
+
+	* dwarfout.c (output_symbol): Use output_dies_for_tagged_type for
+	TYPE_DECLs of tagged types.
+	(dwarfout_output_tagged_type): Deleted.
+	(output_dies_for_tagged_type): Mark TREE_ASM_WRITTEN early.
+
+Mon Jul  8 19:36:44 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* jump.c (jump_optimize): Check for extra labels when detecting
+	"if (...) x = a; else x = b;".  Include the insn for "x = a;" when
+	testing for data conflict.
+
+Mon Jul  8 19:34:14 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* integrate.c (copy_for_inline, case MEM): Must copy a MEM even if
+	it has a constant address if that address involves a LABEL_REF.
+
+	* rtlanal.c (reg_set_p): Only check for REG_INC notes and a CALL_INSN
+	if we are passed an insn.
+	* local-alloc.c (optimize_reg_copy): Remove tests now done in
+	reg_set_p.
+
+Mon Jul  8 16:38:49 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* c-parse.y (yylex): Pedantic warning here for `asm'.
+	No warning for `__asm__'.
+	(maybe_type_qual, maybeasm, extdef): No warning here.
+
+	* objc-actions.c: Rename OBJC_SELS_R_INTS to OBJC_INT_SELECTORS.
+	Rename OBJC_UNIQUE_SELS to OBJ_NONUNIQUE_SELECTORS, reversing sense.
+	Eliminate OBJC_SELS_R_STRUCT_PTRS.
+
+Mon Jul  8 06:37:00 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* rtlanal.c (reg_{used,set}_between_p): Allow FROM_INSN == TO_INSN;
+	return 0 in that case.
+
+	* jump.c (mark_jump_label): Fix typo in use of GET_RTX_LENGTH.
+
+	* reload.c (reload_strict_low): Change comment to say that this is
+	always zero; we don't use it any more.
+
+Sun Jul  7 22:14:13 1991  Michael Meissner  (meissner@churchy.gnu.ai.mit.edu)
+
+	* tm-mips.h (FRAME_POINTER_REQUIRED): Fix typo that required a frame
+	if alloca was not called, instead of the reverse.
+
+Sun Jul  7 17:14:17 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* cccp.c (struct file_buf): New field system_header_p.
+	Everything that pushes on instack now initializes this field.
+	(finclude): New arg to set that field.  Callers changed.
+	(do_include): Pass that arg as 1 for <...>, else 0.
+
+	* cccp.c (do_include): Warn for first use of #import
+	except in system header files.
+	(handle_directive): Support #import if compiling for Next.
+
+	* cccp.c (do_pragma): For #pragma once, warn it is obsolete.
+
+Sun Jul  7 14:29:04 1991  James Van Artsdalen  (james at bigtex.cactus.org)
+
+	* tm-att386.h (NO_DOLLAR_IN_LABEL): Define this here,
+	* tm-i386sco.h (NO_DOLLAR_IN_LABEL):    not here.
+
+Sun Jul  7 06:20:03 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* rtlanal.c (reg_set_p): Return 1 if REG is found in a REG_INC
+	note or if INSN is a CALL_INSN and REG is a hard reg.
+	(reg_set_last): Only return a register or constant; if returning a
+	register, ensure it isn't modified between the SET we found and INSN.
+
+	* jump.c (jump_optimize): If SMALL_REGISTER_CLASSES, don't make a
+	store-flag insn if any register involved is a hard reg.
+
+Sat Jul  6 14:51:15 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* expr.c (expand_assignment): Don't abort for volatile structure field
+	even if the structure is in a register.
+	NOTE: This leaves the problem of implementing whatever meaning
+	a volatile field should actually have.
+
+	* fold-const.c (div_and_round_double): Make lnum and lden unsigned.
+	Use the small-denominator algorithm only for denom < 2**24.
+	Fix backward conditionals in ?: operators in general case.
+	Change i + j to i - 1 + j when indexing num.
+
+Fri Jul  5 21:36:57 1991  Ken Raeburn  (raeburn at watch.com)
+
+	* genpeep.c (match_rtx, case MATCH_OP_DUP): Output semicolon after
+	"goto" statement.
+
+Fri Jul  5 09:45:56 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* rs6000.md (andsi3): Bias alternatives so we always prefer constants.
+	(define_splits of DImode, SFmode, and DFmode): Don't split
+	unless after reload.
+	(ashldi3, lshrdi3): Fix bugs in instruction order; use & in
+	output constraint so can't conflict with operand 2; use '0'
+	constraint to allow operands 0 and 1 to be the same register.
+
+	* regclass.c (reg_n_sets): Move definition before use.
+
+	* reorg.c (fill_simple_delay_slots): Candidate for delay slot cannot
+	set anything set between it and the delay insn.
+
+	* jump.c (jump_optimize): In "if (...) x = a; else x = b;", correctly
+	specify range to check if X is used or set.
+	Use rtx_equal_p to check for matching X.
+
+Thu Jul  4 15:55:45 1991  Tom Wood  (wood at geech.gnu.ai.mit.edu)
+
+	* cccp.c (default_include): Add /usr/mach/include for MACH systems.
+
+	* configure (m88k-luna): Needs make-m88kluna.
+	* make-m88kluna: New file.
+
+	* dwarf.h: New file derived from the UNIX International
+	Programming Languages Special Interest Group DWARF specification.
+	* dwarfout.c (includes): Include "dwarf.h".
+	(subscript_data_attribute): Use FMT_CODE to encode array subscripts.
+	(languagribute): LANG type no longer provided by dwarf.h.
+	(output_source_file_die): Determine proper language attribute.
+
+Thu Jul  4 12:14:16 1991  James Van Artsdalen  (james at bigtex.cactus.org)
+
+	* cplus-xref.c: define rindex if USG
+
+Thu Jul  4 12:36:55 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* gcc.c (process_command): Correctly split -L from its arg.
+	* SWITCHES_NEED_SPACES: New host machine option.
+	This really ought to be defined now for certain hosts,
+	but I don't know which ones they are.
+
+Wed Jul  3 23:31:00 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* tm-m68k.h (ASM_OUTPUT_FLOAT): Check CROSS_COMPILE (there was a typo).
+
+Wed Jul  3 22:05:55 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* cse.c (simplify_binary_operation, case MINUS): Fix typo in op number.
+
+	* cse.c (cse_basic_block): Correctly handle the case where TO
+	was a label with zero uses at the end of the function.
+
+	* combine.c (significant_valid): New variable.
+	(combine_instructions): Turn significant_valid off until after
+	we finished computing reg_significant.
+	(significant_bits): Ignore reg_significant when significant_valid
+	is zero.
+
+	* rtlanal.c (reg_set_last): Go past CALL_INSN as long as we are not
+	looking for a hard register.
+
+Wed Jul  3 21:07:18 1991  Jim Wilson  (wilson at wookumz.gnu.ai.mit.edu)
+
+	* sched.c (schedule_block): When computing what registers are dead
+	at the end of the current block, correctly handle REG_DEAD notes
+	that refer to multi-word hard registers.
+
+	* loop.c (mark_loop_jump): When invalidating loops with multiple
+	entries, must invalidate every nested loop containing the target
+	of a loop entry jump, except for those that also contain the jump
+	itself.
+
+	* loop.c (record_giv): When computing whether a giv is
+	replaceable, check whether the biv update has a valid luid, and
+	mark it as not replaceable if not.
+
+	* combine.c (gen_rtx_combine): Call rtx_alloc instead of gen_rtx,
+	because it is much faster, especially on some RISC machines.
+
+	* fixincludes: Add optional argument which indicates where to put
+	the fixed include files.  Echo the directory name where the
+	include files will be put.
+
+	* cccp.c (struct default_include): Don't examine
+	STANDARD_INCLUDE_DIR or /usr/local/include when
+	NO_STANDARD_INCLUDE_DIR is defined.  This is useful when building
+	cross compilers. 
+	(main): Only send SIGPIPE signal if the SIGPIPE signal exists on
+	the host.
+	(rescan, handle_directive, skip_if_group, validate_else,
+	skip_to_end_of_comment, macarg1, discard_comments): Accept '//' as
+	a comment in Objective-C as well as C++.  The Objective C language
+	specifies that '//' starts a comment.
+
+	* .gdbinit (ptn): Define new macro to print out the name of a type
+	node.
+
+	* stab.def: Correct errors in table for values of DSLINE and
+	BSLINE.  Document the conflict between BROWS and BSLINE.  Document
+	the value of the BROWS field.
+
+Tue Jul  2 23:26:20 1991  Michael Meissner  (meissner at pogo.gnu.ai.mit.edu)
+
+	* mips-tfile.c (toplevel): Add a comment explaining the MIPS ECOFF
+	file format at the start of the file.
+
+Tue Jul  2 14:00:39 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* c-typeck.c (build_array_ref): Report error here if the "array"
+	is not an array or pointer.  Don't leave this for the PLUS_EXPR.
+
+	* cccp.c: Inlcude containing file names/lines in error messages.
+	(print_containing_files): New function.
+	(error*, warning): Call it.
+	(finclude): Increment input_file_stack_tick when file changes.
+
+	* cccp.c: Include descrip.h.
+
+Tue Jul  2 07:44:19 1991  Tom Wood  (wood at geech.gnu.ai.mit.edu)
+
+	* tm-m88k.h (ASM_OUTPUT_SOURCE_LINE): Define only for SDB.
+	* tm-m88kdgux.h (AS_BUG_*): Support these for now.
+
+	* c-decl.c (finish_struct): Invoke dwarfout_output_tagged_type
+	only when producing DWARF debugging info.
+	* cplus-class.c (finish_struct): Ditto.
+
+Mon Jul  1 23:03:34 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* toplev.c (compile_file): Close stack_reg_dump_file iff STACK_REGS.
+
+Mon Jul  1 15:17:57 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* combine.c (set_significant): Ignore CLOBBERs.
+	(simplify_and_const_int, case SUBREG): Only ignore paradoxical SUBREGs
+	if BYTE_LOADS_ZERO_EXTEND.
+	(record_value_for_reg): Fix typo; had I for REGNO.
+
+Mon Jul  1 08:28:09 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* final.c (output_source_line): Output DWARF line numbers.
+
+	* dwarfout.c (dwarfout_output_tagged_type): New function.
+	* c-decl.c (finish_struct): Call it.
+	* cplus-class.c (finish_struct): Call it.
+
+	* dwarfout.c (includes): Need insn-config.h and reload.h.
+	(location_attribute): Use eliminate_regs for correct expression.
+	(output_bound_representation): Use SAVE_EXPR_RTL to get rtl and
+	then use eliminate_regs.
+
+	* reload1.c (reload): When finished, indicate reg_equiv_constant
+	and reg_equiv_memory_loc are no longer valid.
+	(eliminate_regs): Don't attempt use of reg_equiv_constant or
+	reg_equiv_memory_loc if they aren't valid.  No longer static.
+	* reload.h: Declare eliminate_regs.
+
+	* toplev.c (compile_file): Only call dwarfout_file_scope_symbol
+	for VAR_DECLs. 
+
+Sun Jun 30 15:49:39 1991  Ken Raeburn  (raeburn at watch.com)
+
+	* expr.c (expand_builtin, case BUILT_IN_MEMCPY): If alignment test
+	fails, and function was really BUILT_IN_STRCPY, zero out length
+	parameter before expanding call.
+
+Sun Jun 30 18:27:14 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu)
+
+	* jump.c (jump_optimize): In "if (...) x = a; else x = b;", don't
+	move the "x = b;" if the test modifies X or if X is a hard register
+	and SMALL_REGISTER_CLASSES is defined.
+	Turn "if (...) x = 1; else {...} if (x) ..." code on when we have cc0.
+
+Sun Jun 30 13:49:03 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* gnulib2.c (__builtin_saveregs):
+	For i860, make data structure fit in with va-i860.h.
+
+	* tree.c (gcc_obstack_init):
+	Support OBSTACK_CHUNK_ALLOC and OBSTACK_CHUNK_FREE.
+
+	* calls.c (prepare_call_address): 3rd arg now address of chain var.
+	(expand_call): Call changed.
+	* expr.c (emit_library_call): Call changed.
+
+	* function.c (fix_lexical_addr): In recursive call, pass slot address.
+
+	* Makefile.in (cse.o): Added deps.
+
+	* Makefile.in (GNULIB2_CFLAGS): Use -O2.
+
+	* gnulib1.c, gnulib2.c (abort): Undefine only if defined.
+
+	* genattr.c (main): Fix typo in comment end.
+
+Sat Jun 29 21:57:28 1991  Torbjorn Granlund  (tege at zevs.sics.se)
+
+	* longlong.h (__sparc8__ umul_ppmm): Insert 3 nop:s for wr delay.
+	* longlong.h (___IBMR2__): Define umul_ppmm, add_ssaaaa, sub_ddmmss..
+	* longlong.h (__sparc__): Don't call .umul; expand asm instead.
+	  Don't define __umulsidi3 (i.e. use default definition).
+
+Sat Jun 29 06:25:19 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* tm-vax.h (CPP_SPEC): New macro.
+	(LIB_SPEC): Handle -mg.
+
+	* cccp.c (install_builtins): Fix backward test of objc.
+
+	* fold-const.c (size_int): No need to test sign of NUMBER.
+
+	* gcc.c (process_command): Split -L from its arg.
+
+	* gcc.c (S_ISREG): Define if not defined.
+	(delete_temp_files): Use it.
+
+	* limits.h (UCHAR_MAX, CHAR_MAX, USHRT_MAX): Delete `U'.
+	(LONG_MAX, ULONG_MAX): Add `L'.
+
+Fri Jun 28 22:22:58 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* Makefile (realclean): Delete stage1, stage2, stage3.
+
+	* gcc.c (fatal) [HAVE_VFPRINTF]: Do print program name.
+
+Fri Jun 28 15:34:08 1991  Jim Wilson  (wilson at wookumz.gnu.ai.mit.edu)
+
+	* out-sparc.c (output_block_move): Correctly handle the case where
+	the size is not a CONST_INT, and has a value of 0.
+
+	* flags.h (flag_no_inline): Modify comment to match the one in
+	toplev.c.
+
+	* integrate.c (copy_rtx_and_substitute): When creating new rtx,
+	make sure all of the new bitfields are copied, e.g.
+	REG_LOOP_TEST_P, LABEL_OUTPUT_LOOP_P, etc.
+
+	* loop.c (loop_optimize): Call reg_scan after
+	find_and_verify_loops, because it may change register lifetimes.
+	(find_and_verify_loops): After moving a block of code outside the
+	loop, must readjust the loop_number_exit_label and
+	LABEL_OUTSIDE_LOOP_P data of the modified jump and the moved jump.
+	toplev.c (rest_of_compilation): Delete reg_scan call before
+	loop_optimize.
+
+Fri Jun 28 13:16:37 1991  Michael Meissner  (meissner at osf.org)
+
+	* tm-mips.h (toplevel): Add target_flags to externals declared.
+	(toplevel): Add dslots_number_nops, mips_load_reg{,2},
+	mips_fill_delay_slot external declarations for delay slot reorg.
+	(CC1PLUS_SPEC): By default, pass -fno-gnu-binutils to cc1plus.
+	(TARGET_FLAGS): Add -mwc8, -mwc16, -mwc32 to set size of wchar_t,
+	though the switches are not used right now.
+	(TARGET_FLAGS): Add -msoft-float code from rfg@ncd.com to compile
+	on systems w/o floating point.
+	(TARGET_FLAGS): -mdebugf suppresses filling load delay slots.
+	(HARD_REGNO_OK): Relax constraints, allow anything in GP
+	registers, anything in even FP registers, int's only in multiply
+	and divide registers, int/CC in the FPSW register.
+	(FRAME_POINTER_REQUIRED): Require frame if alloca is called for
+	now.
+	(REG_CLASS_FROM_LETTER): Index from an array (mips_char_to_class)
+	instead of having lots of ?:'s.  Also, allow 'd' to signify GP
+	registers.
+	(ENCODE_SEGMENT_INFO): Only record things being in small data/bss
+	if -mgpOPT (-O sets by default), -O, and -G xx where xx > 0.
+	(FINAL_PRESCAN_INSN): Rework to automatically not fill the
+	previous instruction's load delay slots with nop's if it is safe.
+	(ASM_OUTPUT_LABEL): If compiling collect, don't use assemble_name.
+	(ASM_GLOBALIZE_LABEL): If compiling collect, don't use
+	assemble_name.
+	(ASM_OUTPUT_LABELREF_AS_INT): Define this for collect.
+	(ASM_OUTPUT_INT): If collect, don't use output_addr_const.
+
+	* mips.md (all floating point): If -msoft-float, don't allow any
+	floating point builtin operations.
+	(all patterns): Use 'd' constraint to limit things to GP
+	registers, rather than 'r'.  This allows unions of
+	float/int/double to occupy any registers.
+	(*extend*): Call mips_move_1word to handle loads, which in turn
+	sees if we can omit the load nop.
+	(fix_trunc*): Redo, since register allocator can handle moving to
+	the appropriate register set.
+	(movdf_xfer*): Use explicit return's instead of falling through
+	and having the appropriate value in a register from the previous
+	call.
+	(movsf_xfer*): New patterns to accomidate unions of floats and
+	int's.
+	(movsi_unaligned): New define_expand to call either movsi_ulw or
+	movsi_usw.  Also, if not a memory operation, use movsi.
+	(movsi_ulw): Set up to omit load delay nop if we can.
+	(movsi_usw): Use memory_operand instead of simple_memory_operand.
+	Also, allow storing 0 to an unaligned location.
+	(various move patterns): mips_move_1word now takes a third
+	argument to specify whether a load should sign or zero extend.
+	(call_value): Use register_operand on return value.
+	(probe): Turn into define_expand, and set a register to the
+	contents of memory pointed to by the stack pointer with volatil
+	set.
+
+	* out-mips.c (toplevel): Add new global variables:
+	dslots_number_nops, mips_load_reg{,2}, mips_regno_to_class,
+	mips_char_to_class.
+	(simple_memory_operand): If not optimizing, no global memory
+	reference is assumed to be in the GP area.
+	(mips_fill_delay_slot): New function to tell FINAL_PRESCAN_INSN
+	the current insn is a load and may need a nop.
+	(mips_move_1word): Take a third argument to say whether load byte
+	and load half-word sign extend or zero extend.  Change all
+	callers.  If this is a load, call mips_fill_delay_slots to
+	schedule the nops.  Change all return's to setting a variable, and
+	falling through to the end.
+	(mips_move_2words):  If this is a load, call mips_fill_delay_slots
+	to schedule the nops.  Change all return's to setting a variable,
+	and falling through to the end.
+	(function_arg): if -msoft-float, floating point is passed in GP
+	registers.
+	(override_options): Initialize mips_char_to_class.
+	(print_operand): %( and %) no longer do .set nomacro.
+	(print_operand): %# prints #nop if gas or -mstats.
+	(print_operand): Check for too many %), %], and %>'s.
+	(compute_frame_size): Allocate space in stack to hold FP, just in
+	case we later need a FP and previously thought we could eliminate
+	it.
+	(save_restore): Take a string to indicate the 2word load/store to
+	use, but don't use it at present.  Change all callers.  Home
+	varargs registers with sd if we can.
+	(function_epilogue): Deal with one or more outstanding nop's from
+	FINAL_PRESCAN_INSN.
+	(function_epilogue): Revamp -mstats output format.
+	(function_epilogue): Zero new global variables.
+
+	* make-decrose (toplevel): Sort make variables.
+	(CLIB): Add -lld library.
+	(LANGUAGES): Add build of collect-osf and g++.
+	(ULTRIX_DIR): Change internal work directory location.
+	(cplus-lex.o): Don't optimize to avoid problem with 1.39 compiler.
+	(collect-osf): Add rules to build OSF/rose version of collect.
+
+	* make-mips (LANGUAGES): Add build of g++.
+
+	* tm-decrose.h (SIZE_TYPE): Specify to be long unsigned int.
+	(PTRDIFF_TYPE): Specify to be long int.
+	(WCHAR_TYPE): Specify to be long unsigned int.
+
+	* sdbout.c (plain_type_1): Add support for unknown tags if
+	SDB_ALLOW_UNKNOWN_REFERENCES is defined.  The MIPS ECOFF support
+	needs this, but standard COFF typically doesn't allow unknown
+	references.
+
+	* gcc.texinfo (Debugging Info): Document
+	SDB_ALLOW_UNKNOWN_REFERENCES and SDB_ALLOW_FORWARD_REFERENCES.
+
+	* collect-osf.c (whole file): New file to provide collect support
+	on OSF/rose.
+
+Fri Jun 28 09:20:18 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* configure (m88k-luna): New target.
+	* tm-m88kluna.h: New file for the Omron Luna/88k.
+	* xm-m88k.h: Don't use USG for the luna88k.
+
+	* tm-m88kdgux.h: DG/UX implements coff and elf.  Currently elf is
+	a strange variant of coff that's non-standard (it uses SDB
+	debugging info for example).  Soon, the DG/UX elf will support
+	DWARF.  These changes provide transitional support for all three.
+	(DWARF_DEBUGGING_INFO, SDB_DEBUGGING_INFO): Define both.
+	(VERSION_0300_SYNTAX): True when -msvr4 and -mversion-03.00.
+	* tm-m88ksvr4.h (ASM_FILE_END, ASM_OUTPUT_DWARF_LINE): Move these
+	to tm-m88k.h.  They are dwarf specific.
+	* tm-m88k.h (TARGET_SWITCHES): Add -mversion-03.00 and -mdwarf.
+	(OVERRIDE_OPTIONS): If using version 03.00 syntax, assume DWARF_DEBUG.
+
+	* tm-m88k.h (REG_ALLOC_ORDER): Adapt slightly for using r26-r29.
+
+	* out-m88k.c (m88k_debugger_offset): Don't complain if the base
+	register is optimized away.
+
+Thu Jun 27 21:43:36 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* local-alloc.c (memref_referenced_p, memref_used_between_p):
+	New functions.
+	(update_equiv_regs): Call memref_used_between_p.
+
+Thu Jun 27 19:59:36 1991  Ken Raeburn  (raeburn at watch.com)
+
+	* print-tree.c (print_node): Changed the various "lang_#" strings to
+	indicate which of several possible fields are being examined; new
+	strings are "tree_#", "decl_#", "type_#".
+
+Thu Jun 27 15:05:43 1991  Michael Meissner  (meissner at churchy.gnu.ai.mit.edu)
+
+	* xm-mips.h (ONLY_INT_FIELDS): Define if not compiling with GCC
+	since the MIPS compiler treats enum bitfields as signed.
+
+Wed Jun 26 19:48:16 1991  Jim Wilson  (wilson at wookumz.gnu.ai.mit.edu)
+
+	* sched.c (memrefs_conflict_p): Explicitly handle case where both
+	X and Y are CONST.
+	(sched_analyze_2): Do create dependencies for insns with REG_EQUIV
+	notes.
+	(sched_note_set): Correctly handle the case where the destination
+	register is a multi-word hard register.
+	(attach_deaths): Don't add a REG_DEAD note to an insn with a
+	REG_UNUSED note that mentions the same register.  Correctly handle
+	the case where the destination register is a multi-word hard
+	register.
+	(schedule_block): Also call sched_note_set for CLOBBERs when
+	computing which registers are dead at the end of the basic block.
+	Also call sched_note_set for USEs when computing what registers
+	are still live after a just scheduled insn.
+	(regno_use_in): New function, subroutine of split_hard_reg_notes.
+	Searches an rtx for any reference to the given register, and
+	returns the register rtx used if any.
+	(split_hard_reg_notes): New function.  Handles the case where a
+	multi-word hard register with a REG_DEAD note gets split.  Creates
+	a new REG_DEAD note for each part of the original hard register
+	used by the split insns.
+	(new_insn_dead_notes): Don't add a REG_DEAD note to an insn with a
+	REG_UNUSED note which mentions the same register.
+	(update_links): Add call to new function split_hard_reg_notes.
+	Correctly handle the case when the dest of the original insn was a
+	multi-word register which was split in the split insns.  In this
+	case, the dest is no longer killed here, so must remove the
+	REG_DEAD on the last previous insn in this basic block which used
+	dest, if any such exists.
+
+	* unroll.c (reg_dead_after_loop): Check that a CODE_LABEL which is
+	the target of a JUMP_INSN has a non-zero PREV_INSN field before
+	trying to derefence it.  Fail if there is no previous insn.
+
+	* loop.c (scan_loop): Fix typo.
+	* local-alloc.c (optimize_reg_copy): Likewise.
+	* global-alloc (hard_reg_copy_preferences): Likewise.
+	* gcc.texinfo (REG_LOOP_TEST_P): Likewise.
+	* optabs.c (expand_float): Likewise.
+	* tm-vaxv.h (ASM_OUTPUT_ASCII): Likewise.
+
+	* out-sparc.c (output_move_double): Sign extend CONST_INTs that
+	feed DImode targets.
+	* tm-sparc.h (GO_IF_LEGITIMATE_ADDRESS): Don't accept a LABEL_REF
+	as a legal address.  Also, delete obsolete parts of preceeding
+	comment.
+
+	* reload1.c (alter_reg): Only try to delete the reg_equiv_init
+	insn if it hasn't already been deleted by a previous call to
+	delete_dead_insn.
+
+	* toplev.c (main): Handle -gdbx in addition to -gsdb for
+	orthogonality.
+	* gcc.texinfo: Document -gdbx.
+
+Tue Jun 25 09:57:08 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* m88k.md (casesi): Don't emit a barrier; the dispatch code must
+	adjoin the table.
+	* tm-m88k.h (DONT_REDUCE_ADDR): Don't use this.
+	(CONDITIONAL_REGISTER_USAGE): The PIC register is also call-used.
+	* out-m88k.c (m88k_layout_frame): Save the PIC register.
+
+Tue Jun 25 07:40:43 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* function.c (expand_function_end): FNDECL should
+	be CURRENT_FUNCTION_DECL.
+
+	* combine.c (find_split_point): If we see an AND operation as the
+	first operand of some non-AND operation, use it as a split point.
+	(subst): Add counter to limit restarts, go to restart more often.
+	(subst, case AND): If we get (ior (and (X C1) C2)) and can't
+	restart more than once, rewrite with C1 as small as possible and exit.
+
+	* cse.c (cse_end_of_basic_block): Don't put branch in our path more
+	than once.
+	(cse_main): Clear PATH_SIZE when skipping a block.
+	(cse_basic_block): Use GET_RTX_CLASS.
+
+Tue Jun 25 07:39:29 1991  Matthew Self  (mself at next.com)
+
+	* varasm.c (const_hash, compare_constant_1, record_constant_1):
+	For ADDR_EXPR's, don't hash address of SYMBOL_REF.  Only use
+	offset and name of symbol.  This allows constructors which
+	contain pointers to identical string literals to be uniqued.
+
+	* loop.c (loop_optimize, init_loop):  Moved call to
+	gcc_obstack_init() from loop_optimize() to init_loop().
+
+	* reload1.c (reload, init_reload):  Moved call to
+	gcc_obstack_init() from reload() to new function init_reload().
+
+	* toplev.c (compile_file):  Call new function init_reload().
+
+Mon Jun 24 16:05:57 1991  Jim Wilson  (wilson at wookumz.gnu.ai.mit.edu)
+
+	* stmt.c (expand_end_stmt_expr): Fix typo in comment.
+
+	* reload1.c (modes_equiv_for_class_p): Only fail if registers in
+	CLASS that can hold ALLOCATE_MODE can't also hold OTHER_MODE.  Do
+	not fail for the reverse test.  ALLOCATE_MODE is always a larger
+	or same size mode as OTHER_MODE, and will be the mode that reload
+	uses when allocating spill registers.  Rewrite comments to explain
+	new behaviour.
+	(reload): Change call to modes_equiv_for_class_p to match new
+	semantics.
+
+	* combine.c (simplify_shift_const): When simplifying (ashiftrt
+	(ashift inner_const_int) const_int), was checking the wrong number of
+	high order bits of inner_const_int.  Also correct typos in comments.
+
+	* c-convert.c (convert_to_integer): Must also check ARG1 for
+	unsignedness, because ARG0 could be a constant when EXPR is a
+	MINUS_EXPR.
+
+	* combine.c (try_combine): When splitting, it is not safe to use
+	I2DEST if it is referenced by NEWPAT.
+
+	* combine.c (distribute_notes): After converting REG_DEAD notes to
+	REG_UNUSED notes, clear PLACE if it already has a REG_UNUSED note,
+	to prevent adding a duplicate REG_UNUSED note.
+
+	* gcc.texinfo (SIGNED_CHAR_SPEC): Document.
+
+Mon Jun 24 10:02:32 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* cse.c (cse_set_around_loop): Ensure the insn we find in front
+	of the loop does the set in the proper mode.
+
+	* optabs.c (expand_float): Always do conversions to FMODE in the
+	signedness of the input.
+
+	* reload.c (find_reloads, find_reloads_toplev): If reg_equiv_address
+	is not a constant address, copy it in case it is shared.
+
+	* reload1.c (eliminate_regs): Copy reg_equiv_memory_loc in case
+	it is shared and we make a reload inside it.
+
+	* stupid.c (stupid_mark_refs): Registers that aren't used must die
+	in the insn after their birth so they conflict with other outputs.
+
+	* vax.md: Replace patterns to convert (and (ashiftxx))
+	into (and (rotatexx)) with the patterns that are actually made
+	by combine.
+	We can allow offsettable addresses for operand 0 and it is not
+	early-clobber.
+
+	* out-rs6000.c (secondary_reload_class): Correctly interpret result of
+	true_regnum.
+
+	* out-rs6000.c (output_toc): Write FP constants in TOC.
+	* tm-r6000.h (TARGET_FP_IN_TOC): New flag.
+	(TARGET_SWITCHES): Add -mfp-in-toc and -mno-fp-in-toc.
+	(TARGET_DEFAULT): -mfp-in-toc is the default.
+	(ASM_OUTPUT_SPECIAL_POOL_ENTRY_P): FP constants may be put in the TOC.
+
+Mon Jun 24 00:52:44 1991  James Van Artsdalen  (james at bigtex.cactus.org)
+
+	* out-i386.c (output_fix_trunc): If the dest operand mentions the
+	stack pointer, then we must adjust it to account for the temporary
+	space we allocate on the stack here.
+
+Sat Jun 22 07:24:33 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* cse.c (cse_set_around_loop): Fix typo in call to note_mem_written.
+
+	* emit-rtl.c (reorder_insns): Correctly handle case when AFTER is last
+	insn.
+
+	* expr.c (expand_expr, case COND_EXPR): Correctly handle X ? A : X + 1.
+	Previous change called invert_truthvalue which can modify EXP; we now
+	call it a second time to undo its action if do_store_flag fails.
+
+Sat Jun 22 02:37:59 1991  James Van Artsdalen  (james at bigtex.cactus.org)
+
+	* cse.c (cse_set_around_loop): Don't try to initialize an
+	automatic structure.
+
+	* reg-stack.c (compare_for_stack_reg): If both operands to a
+	compare are the same stack reg, don't process death on the second.
+
+	* i386.md (all float patterns): Don't allow constants in the
+	operand predicates.
+	(all patterns using convert_387_op): Split patterns into one using
+	FLOAT and another using FLOAT_EXTEND.
+
+Fri Jun 21 20:37:03 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* sched.c (line_note, line_note_head): New vectors for use when
+	dealing with line-number notes.
+	(unlink_notes): Put line-number notes in LINE_NOTE for reuse.
+	(schedule_block): Just before reordering the insns, walk the insns
+	and record the line-number note in effect for each one.  When
+	reordering is complete, restore the line-number notes as needed.
+	(schedule_insns): When debugging information is present, allocate
+	and initialize line_note and line_note_head.  After scheduling,
+	walk the insns to delete redundant line-number notes.
+
+Fri Jun 21 19:54:29 1991  Jim Wilson  (wilson at wookumz.gnu.ai.mit.edu)
+
+	* old-sparc.c, out-old-sparc.c, tm-old-sparc.h: Delete obsolete
+	files.
+
+	* loop.c (loop_number_exit_labels): Expand comment.  Mention that
+	returns are not included because all bivs and givs are pseudos and
+	hence must be dead after a return.
+
+Fri Jun 21 07:10:56 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* combine.c (subst, case PLUS, MINUS): Remove cases for things like
+	(x-y)+y; now done in simplify_binary_operation.
+	* cse.c (simplify_unary_operation): Handle (sign_extend (truncate ..))
+	as used in casesi patterns.
+	(simplify_binary_operation, case PLUS, MINUS): Don't do most
+	simplifications if IEEE floating-point.
+	Add cases for things like (x-y)+y.
+	(fold_rtx): Replace PC with LABEL_REF if we are immediately in
+	front of a jump table.
+	Move code to apply associative law to after we have folded the
+	operands.
+	(fold_rtx, case MEM): Fix errors in checking for index of jump
+	table being out of range.
+	For ADDR_DIFF_VEC, return a MINUS or (truncate (minus L1 L2)).
+	(fold_rtx, case PLUS): If we have (plus X (label_ref L)), see
+	if X is equivalent to (minus L1 L2).
+	(cse_insn): Put (minus L1 L2) in `src_const' so it gets in a
+	REG_EQUAL note and gets put in the hash table.
+	If we are branching to a jump table, we are really branching to
+	immediately after the jump table
+	Remove special-case kludge for ADDR_DIFF_VEC; now handled properly.
+
+	* vax.md (casesi): Make pattern agree with machine instruction;
+	specifically, index is multiplied by two and the comparison is LEU,
+	not LE.
+
+	* cse.c (equiv_constant): If X is a one-word SUBREG of a larger
+	quantity, use `lookup_as_function' to see if it is equivalent
+	to a CONST_INT.
+
+	* jump.c (squeeze_notes): No longer static.
+	* loop.c (find_and_verify_loops): Need to call squeeze_notes when
+	moving block of code (see last change).
+
+	* reload.c (find_reloads): When forcing constant to memory,
+	set recog_operand to the result of find_reloads_toplev.
+
+	* combine.c (subst, case PLUS): Add (c1 - a) + c2 -> (c1+c2) - a.
+	(subst, case MINUS): Use simplify_binary_operation rather than
+	making CONST_INT from subtraction of two INTVAL's to ensure it
+	gets truncated as appropriate for its mode.
+	Add (c1 - (c2 - a)) -> (c1-c2) + a.
+
+	* a29k.md (negdf2): Use operand_subword_force, not operand_subword.
+	(movsf): Use operand_subword, not gen_lowpart.
+
+	* out-rs6000.c (u_short_cint_operand): New function.
+	(print_operand): Support auto-decrement.
+
+	* tm-rs6000.h (OVERRIDE_OPTIONS): Force profiling off.
+	(PREFERRED_RELOAD_CLASS): Return NO_REGS for real CONST_DOUBLE.
+	(HAVE_PRE_DECREMENT): Define this.
+	(GO_IF_LEGITIMATE_ADDRESS, GO_IF_MODE_DEPENDENT_ADDRESS):
+	Support PRE_DEC.
+
+	* rs6000.md (zero_extendxx): Use rlinm, not andil so we avoid
+	clobbering cr0.
+	(arith-and-record patterns): Correct some bad operand numbers.
+	Put SImode output as operand 0 to improve register tying.
+	(andsi): Prefer rlinm over andil and andiu.
+	(load/store-with-update): Add patterns for these instructions.
+	(allocate_stack): New, replaces stack probe.
+	(add-and-compare): New patterns, with define_split.
+	(subtract-one-and-jump): Allow outputs anywhere; handle with
+	match_scratch and define_split.
+
+	* stmt.c (expand_end_stmt_expr): If `last_expr_value' is 0, set it
+	to const0_rtx.
+
+	* regclass.c (reg_n_sets): Move definition to before use.
+
+	* jump.c (find_cross_jump): Don't try to substitute REG_EQUAL
+	values unless they are constants.
+
+Fri Jun 21 02:37:59 1991  James Van Artsdalen  (james at bigtex.cactus.org)
+
+	* reload1.c (reload): Don't clear after_call for each insn.
+
+Sun Jun 16 17:28:43 1991  James Van Artsdalen  (james at bigtex.cactus.org)
+
+	* reload1.c (reload, reload_as_needed, choose_reload_regs): Enable
+	code to avoid return register when SMALL_REGISTER_CLASSES defined.
+
+	* final.c (final_scan_insn): Don't look for no-op moves if
+	processor has STACK_REGS.
+
+	* hard-reg-set.h (GO_IF_HARD_REG_EQUAL): New macro.
+
+	* jump.c (cross_jump_death_matters): New variable.
+	(find_cross_jump): If processor has STACK_REGS, compare death
+	notes if they matter.
+
+	* toplev.c (compile_file, rest_of_compilation): Support new
+	stack-regs conversion pass.
+	(main, compile_file, rest_of_compilation): Add support for -dk to
+	dump after stack-regs conversion.
+	* reg-stack.c: New file.  Implements stack-regs conversion pass.
+	* Makefile.in (reg-stack.o): New file.
+
+	* tm-i386.h (STACK_REGS): New macro.
+	(all register macros): Define all eight float point registers.
+	(HARD_REGNO_NREGS): Only one float reg is needed for any mode.
+	(HARD_REGNO_MODE_OK): Move code here from out-i386.c.
+	(FIRST_STACK_REG,LAST_STACK_REG): New macros.
+	(ARG_POINTER_REGNUM): Move to reg 16.
+	(FP_REGNO_P): Recognize all float regs.
+	(QI_REG_P): New macro.
+	(STACK_REG_P,NON_STACK_REG_P,STACK_TOP_P): New macros.
+	(PRESERVE_DEATH_INFO_REGNO_P): Delete.
+	(OVERLAPPING_REGNO_P): Delete.
+	(CONST_OK_FOR_LETTER_P): Recognize constant mask for byte or word.
+	Recognize constant 0..3 for `lea' shifts.
+	(CONST_DOUBLE_OK_FOR_LETTER_P):
+	(PREFERRED_RELOAD_CLASS): Don't put CONST_DOUBLE in float regs.
+	QImode must go in class Q_REGS.  Float regs can't hold MODE_INT.
+	(MOVE_RATIO): New macro.
+	(SHIFT_COUNT_TRUNCATED): Delete.  Bit opcodes don't truncate.
+	(RTX_COSTS): New macro.
+	(CONST_COSTS): Make constants cheaper.
+	(QI_HIGH_REGISTER_NAMES): Renamed from QI_REGISTER_NAMES_TOP.
+	(INSN_CLOBBERS_REGNO_P): Delete.
+	(FP_TOP,RETCOM,POP_ONE_POP,FP_CALL1,FP_CALL): Delete.
+
+	* out-i386.c (fp_pop_level): Delete.
+	(fp_call_internal, output_asm_insn_double_reg_op, via_memory,
+	fp_store_sf,fp_pop_sf,fp_store_df,fp_pop_df,fp_pop_int,
+	fp_push_sf,fp_push_df,output_movsf,output_movdf,output_movf,
+	top_dead_p,call_top_dead_p,fp_top_dead_p1,mentioned_fp_top): Delete.
+	(hard_regno_mode_ok): Moved to tm-i386.h.
+	(qi_high_reg_name): New variable.
+	(output_op_from_reg, output_to_reg): New function.
+	(singlemove_string,output_move_const_single): No longer static.
+	(singlemove_string): Use correct operand number	in `push' string.
+	(standard_80387_constant_p): Use recommended method to extract
+	float from CONST_DOUBLE.
+	(PRINT_REG): Add 'h' for "high" register names, 'y' for "st(0)".
+	(print_operand): Code 'z' prints no size suffix for stack regs.
+	Print DImode suffix as "ll", not just "l".
+	(output_fix_trunc): New argument `insn'.  Generalize to output to
+	MEM or REG.  Return "char *" like other output routines.
+	Generalize for SImode or DImode output.
+	(binary_387_op,convert_387_op,float_op,fix_op,shift_op): New
+	match_operator predicates.
+	(output_387_binary_op,output_float_compare): New functions.
+
+	* i386.md (all MODE_FLOAT patterns): Replace with new code to use
+	all FPU registers.
+	(all patterns): Use AS2 and AS1 macros where possible, for
+	eventual support of Intel syntax output.
+	(tstM): Don't initialize operands unless we need to.
+	(cmpM): Choose operange order in output for speed on i386.
+	(logical test patterns): The operands commute.  If possible,
+	SImode tests should use just QImode.
+	(movstrictM): New patterns.
+	(movqi): Don't allow a constant of unknown value into Q_REGS.
+	(`lea' pattern): Move after addsi3.
+	(addsi3): Do three operand adds with `lea'.
+	(divsi3,divhi3,udivsi3,udivhi3): Delete in favor of u?divmodM4.
+	(divqi3,udivqi3): Remove earlyclobber for operand 0.
+	(andM3): Define three operand ANDs for 255 and 65535 using zero
+	extend opcode.  Also directly do an AND in the second byte of a
+	register.
+	(iorM3,xorM3): Do byte ior instead of word where possible.
+	(xorqi3): Allow operands[2] from MEM.
+	(ashlsi3): Allow three-operand shift of 0..3 with `lea' opcode.
+	(lshlM3): Redundant, delete.
+	(shift & rotate patterns): Print %0 as destination operand.
+	(bit recognizers): New patterns to set, clear and compliment.
+	(call insns): Use "%P" code for targets to support Intel syntax.
+	(movstrsi): Express changes to the operands instead of just
+	clobbering them.  Don't accept non-constant move count, as our
+	code isn't as efficient as a library call.
+
+Thu Jun 20 13:51:02 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* cse.c (cse_insn): If we fold a conditional or computed branch to an
+	unconditional branch, it is now not in the normal format for an
+	unconditional branch, and it only has one set, delete it and
+	re-emit it.
+	Whenever we make an unconditional branch, set `cse_skip_to_next_block'
+	and do nothing else.
+	(cse_basic_block): Increment LABEL_NUSES on TO if it is a label
+	so it won't go away while we are using it as a stopping point.
+	If we are done with this block (`cse_skip_to_next_block' nonzero),
+	pretend we just did the insn before TO.
+	Decrement LABEL_NUSES of TO if it is a label; if it became zero,
+	delete it and try to extend the basic block.
+
+	* reload.c (find_reloads): Fix typo in check for no alternatives
+	found.
+
+	* combine.c (reg_significant, significant_mode): New vars.
+	(combine_instructions): Allocate and initialize reg_significant.
+	(set_significant): New function.
+	(significant_bits, case REG): Use reg_significant, if non-zero
+	as the significant bits of a register.
+
+	* loop.c (n_times_set): Define -2 to mean that a register is
+	an candidate to be moved and is a constant.
+	(scan_loop): Set n_times_set to -1 or -2 as appropriate.
+	(regs_match_p): No need to check REG_FUNCTION_VALUE_P.
+	A register and a constant can be equal if the register is known	
+	equivalent to the constant.
+	(invariant_p): Check n_times_set < 0, not == -1.
+
+	* rtl.h (REG_LOOP_TEST_P): New macro.
+	* jump.c (duplicate_loop_exit_test): Mark registers used only in
+	loop exit test.
+	* cse.c (cse_around_loop, cse_check_loop_start, cse_set_around_loop):
+	New functions.
+	(cse_end_of_basic_block): Add new arg to say if we are being called
+	after loop.c has run; if we are being called after loop.c, we can
+	ignore NOTE_INSN_LOOP_ENDs.
+	(cse_main): Accept new AFTER_LOOP arg; pass to cse_end_of_basic_block.
+	If we are called before loop.c, see if we can cse around to the
+	start of a loop.  
+	* toplev.c (rest_of_compilation): Tell cse_main if it is being called
+	before or after loop.c.
+
+	* rtl.h (LABEL_OUTSIDE_LOOP_P): New macro.
+	* loop.h (uid_loop_num): Renamed from luid_loop_num and now
+	maps INSN_UID to loop number instead of INSN_LUID.
+	* loop.c (loop_optimize): Modifications for the above.
+	(find_and_verify_loop): Change luid_loop_num to uid_loop_num.
+	Look for blocks of code ending in an unconditional branch out
+	of the loop surrounded by a conditional branch and try to move
+	such a block out of the loop.
+	(mark_loop_jump): Change luid_loop_num to uid_loop_num.
+	Mark all LABEL_REFs that are outside the current loop, for
+	branch prediction.
+	(strength_reduce, check_dbra_loop): Change luid_loop_num to 
+	uid_loop_num.
+	* unroll.c (unroll_loop, find_splittable_{regs,givs}): Likewise.
+	(reg_dead_after_loop, final_{biv,giv}_value): Likewise.
+
+	* flow.c (reg_n_sets): Don't define this here.
+	* regclass.c (reg_n_sets): Define it here.
+	(reg_scan): Allocate and initialize reg_n_sets.
+	(reg_scan_mark_refs): Count sets of a register in reg_n_sets.
+
+	* sched.c (reg_known_value_size): New variable.
+	(canon_rtx): Don't look in reg_known_value outside its allocated space.
+	(init_alias_analysis): Initialize reg_known_value_size.
+
+	* loop.c ({unknown,fixed}_aggregate_altered): Deleted.
+	(loop_store_mems): Replaces loop_store_addrs and loop_store_widths.
+	(loop_optimize): Call init_alias_analysis.
+	(prescan_loop, note_addr_stored): Save all MEMs stored into, rather
+	than just those that appear fixed; save MEMs rather than addresses
+	and widths.
+	(invariant_p): Use true_dependence to see if a MEM is invariant;
+	compare it with all MEMs stored during the loop.
+
+	* sched.c (memrefs_conflict_p): If XSIZE or YSIZE is zero
+	the object conflict if they have the same base, irregardless
+	of the offsets.
+
+	* reorg.c (dbr_schedule): Reallocate unfilled_firstobj after
+	freeing memory from the obstack.
+
+	* reload.c (push_reload): Always reload object inside SUBREG if
+	STRICT_LOW_PART is present.
+	Always set RELOAD_STRICT_LOW to zero; maybe we should get rid of it.
+
+	* reload.c (make_memloc): Copy the address if it varies to avoid
+	potential sharing problems.
+
+	* global-alloc.c (hard_reg_copy_preferences): New var.
+	(global_alloc): Allocate and initialze it.
+	(prune_preferences): Prune it.
+	(find_reg): Try preferences in hards_reg_copy_preferences first,
+	then hard_reg_preferences.
+	(set_preference): Set bit in hard_reg_copy_references, if appropriate.
+
+	* emit-rtl.c (try_split): If we are splitting a JUMP_INSN, copy	
+	JUMP_LABEL from the old to new insn update the count of that label.
+
+	* cse.c (lookup): Always call exp_equiv_p unless we have a REG.
+
+	* cse.c (insert): If we are making a register equivalent to a
+	constant that was already equivalent to a constant, update
+	qty_const_insn.
+	(cse_insn): Don't do it here.
+	* cse.c (fold_rtx): Always call simplify_unary_operation.
+
+	* cse.c (record_jump_equiv): Don't get primary elements for OP0 and
+	OP1 since they might not be valid.
+
+	* loop.c (get_condition): Accept new arg, EARLIEST that is a pointer
+	to where we place the earliest insn used to form the condition.
+	Check for comparison with CC0 in main loop, not earlier.
+	Never return condition involving CC0.
+	(get_condition_for_loop): Call get_condition with new arg.
+	* jump.c (jump_optimize): When we make store-flag insn, put new
+	insns before earliest insn used to form condition and use new
+	psuedo as target, which we copy into VAR immediately after the insn
+	that currently sets VAR.
+	Turn off "if (...) x = 1; else {...} if (x) ..." code; it is not
+	correct and can't be easily fixed.
+	(get_label_{before_after}): Use {prev,next}_nonnote_insn.
+
+	* jump.c (jump_optimize): Don't interpret NOOP_MOVES as meaning
+	"after_reload"; check reload_completed instead.  Don't pass NOOP_MOVES
+	to functions that aren't actually trying to noop moves.
+	(follow_jumps, tension_vector_labels):  Don't accept AFTER_RELOAD arg;
+	check reload_completed instead.
+
+	* combine.c (try_combine): Don't check that we don't have a
+	single_set when trying to replace a SET_DEST in a PARALLEL in I2.
+	(simplify_and_const_int): Always do the AND in the mode passed.
+	(significant_bits, case DIV and UDIV): Nothing special known
+	about low-order bits here.
+	(simplify_shift_const, shift cases): Don't go into infinite loop if
+	we combine two shifts in the same direction.
+
+	* c-parse.y, cplus-parse.y, objc-parse.y (set_yydebug): Move to
+	end of file so we don't have a reference to yydebug after its
+	definition; also delete duplicate declaration.
+
+Thu Jun 20 09:08:21 1991  Tom Wood  (wood at geech.gnu.ai.mit.edu)
+
+	* local-alloc.c (block_alloc): Fixed typo in last edit.
+
+Wed Jun 19 17:05:52 1991  Jim Wilson  (wilson at wookumz.gnu.ai.mit.edu)
+
+	* reload.c (push_reload): Verify reload_in[i] exists before using
+	GET_CODE on it.
+
+	* m88k.md: USE insns must be immediately before CALL_INSNs to work
+	properly, otherwise sched.c and reorg.c will not associate them will
+	the CALL.
+
+	* unroll.c (calculate_giv_inc): Accept constant increments
+	represented as a LO_SUM.
+
+	* flow.c (mark_used_regs): Don't put a REG_DEAD note on insns that
+	already have a REG_UNUSED note.  This makes it consistent with
+	combine.c.
+	* combine.c (distribute_notes): If a REG_UNUSED reg is no longer
+	set by an insn, but is still used by the insn, then must convert
+	the REG_UNUSED note to a REG_DEAD note.
+
+	* gcc.c (SIGNED_CHAR_SPEC): Put ifndefs around it, so that it can
+	be overriden by a definition in the tm.h file.
+
+	* cse.c (cse_insn): Add missing third parameter to find_reg_note calls.
+
+	* tm-arm.h (INIT_CUMULATIVE_ARGS): Take LIBNAME as third argument.
+
+	* combine.c (can_combine_p): Remove extra argument in call to
+	find_reg_note.
+
+	* rtlanal.c (find_regno_note): Verify that the note contains a
+	REG before checking its REGNO.
+
+	* cse.c (canon_reg): Fix spacing/punctuation error.
+	* recog.c (constrain_operands): Likewise.
+	* tree.h: Likewise.
+	* varasm.c (Assemble function): Likewise.
+
+Wed Jun 19 13:14:22 1991  Tom Wood  (wood at geech.gnu.ai.mit.edu)
+
+	* local-alloc.c (block_alloc): When counting instructions, abort if
+	a loop is detected.  Improperly threaded insns are easy to produce
+	when working on the scheduler.
+
+Sat Jun 15 06:13:11 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* combine.c (simplify_and_const_int, case ASHIFTRT): Avoid infinite
+	loop if simplify_shift_const doesn't do anything.
+
+Thu Jun 13 09:05:12 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* m88k.md (decrement_and_branch_until_zero): Add this insn.
+	
+Thu Jun 13 07:32:37 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* explow.c (plus_constant): Fix error in last change; CONST case
+	wasn't handled correctly.
+
+	* tm-m68k.h (CONST_CONSTS): Constants between -7 and -1 are cheap
+	because of subq.
+
+	* m68k.md (dbra): Operand 0 should have '+' constraint, not '='.
+
+	* expmed.c (store_fixed_bit_field): Clean up some confusion between
+	targets and results in expand_binop calls.
+
+	* local-alloc.c (optimize_reg_copy): Fix several typos relating to
+	status updating.
+	Correctly handle the case where DEST dies before SRC.
+	Fix some comments that had SRC and DEST backwards.
+
+	* combine.c (can_combine_p): Swap order of args of && to avoid
+	unnecessary calls to use_crosses_set_p.
+	(simplify_and_const_int, case SUBREG): Make code agree with comment.
+
+	* emit-rtl.c (operand_subword): Avoid compilation warning.
+
+	* expmed.c (store_fixed_bit_field): Don't use OP0 as SUBTARGET
+	if it is a MEM and -fforce_mem was specified.
+
+	* expmed.c (emit_store_flag): After scc insns, convert to wider
+	mode using unsigned conversion if STORE_FLAG_VALUE is positive.
+
+	* expmed.c (init_expmed): Use mode of size BITS_PER_WORD instead
+	of SImode.
+	(store_bit_field, extract_bit_field): Replace references to SImode
+	with MAXMODE.
+	(store_fixed_bit_field, extract_fixed_bit_field): Don't use explicit
+	modes; use get_best_mode instead.
+	(store_split_bit_field, extract_split_bit_field): Use operand_subword
+	and mode_for_size instead of making SUBREGs and using SImode.
+
+	* stor-layout.c (get_best_mode): Allow LARGEST_MODE to be VOIDmode,
+	in which case we can use any appropriate mode.
+
+Wed Jun 12 16:32:37 1991  Michael Tiemann  (tiemann at pogo.gnu.ai.mit.edu)
+
+	* cplus-decl.c (init_decl_processing): Compensate for tm-sparc.h
+	change to WCHAR_TYPE handling.
+
+Wed Jun 12 10:19:13 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+        * tm-sparc.h (WCHAR_TYPE): Must be "short unsigned int".
+
+	* combine.c (subst, make_extraction, simplify_shift_const): Don't
+	change mode of volatile MEM; replaces similar change of June 1st.
+	* function.c (fixup_var_refs_1, optimize_bit_field): Likewise.
+	* recog.c (validate_replace_rtx_1): Likewise.
+
+Tue Jun 11 22:09:28 1991  Michael Tiemann  (tiemann at cygint.cygnus.com)
+
+	* expr.c (expand_expr, case COND_EXPR): Expressions of both the form
+	X ? A + 1 : A and X ? A : A + 1 were being done, but only the former
+	was being handled correctly.
+
+Tue Jun 11 12:13:53 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* recog.c (validate_replace_rtx_1): If putting a CONST_INT in a
+	ZERO_EXTEND or SIGN_EXTEND, try to simplify the operation or fail;
+	the semantics of the operation require a non-VOIDmode argument.
+
+	* cse.c (delete_dead_from_cse): Don't delete last insn in a libcall.
+
+	* explow.c (allocate_dynamic_stack_space): Don't clobber SIZE when
+	rounding it.
+
+	* fold-const.c (fold, case COND_EXPR): Ensure we always return an
+	expression in the correct type.
+
+	* expr.c (emit_push_insn): Don't need to put X in register if it
+	is constant; operand_subword_force can do so if needed.
+
+	* reload.c (find_reloads): Simplify nested `if' statements.
+	* recog.c (constrain_operands): Likewise.
+
+	* jump.c (mark_jump_label): Fix typo (extra paren) in last change.
+
+Tue Jun 11 10:03:08 1991  Micheal Tiemann  (tiemann at pogo.gnu.ai.mit.edu)
+
+	* collect2.c: New file.
+
+	* sched.c (memrefs_conflict_p): Finish removing ASHIFT case.
+
+	* emit-rtl.c (operand_subword): Change test of BITS_PER_WORD <
+	HOST_BITS_PER_WORD from compile-time to run-time.
+	* expr.c (emit_push_insn): Ditto.
+	* recog.c (constrain_operands): Ditto.
+	* reload.c (find_reloads): Ditto.
+
+	* jump.c (jump_optimize): Add `continue' after deleting INSN in case
+	where further attempts to optimize the insn are invalid.
+	(mark_jump_label): Don't crash if NEXT == 0.
+
+Tue Jun 11 09:14:05 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* out-m88k.c (legitimize_operand): New function to convert
+	CONST_DOUBLE to SFmode when possible.
+	* m88k.md (cmpdf, adddf3, subdf3, muldf3, divdf3): Use it.
+	* tm-m88k.h: Declare it.
+
+	* xm-m88k.h (OBSTACK_CHUNK_SIZE): For DG/UX at least, the default
+	value results in a perfect checkerboard.
+
+Tue Jun 11 07:23:45 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* expr.c (expand_expr, case FLOAT_EXPR, FIX_EXPR): Don't try to
+	do any partial conversions here; expand_fix and expand_float now
+	handle all modes.
+	* optabs.c (fixtab, fixtrunctab, floattab): Table now contains
+	all modes.
+	(can_fix_p, can_float_p): Use mode as index in tables.
+	(init_fixtab, init_floattab): Likewise.
+	Add support for QImode and HImode operations.
+	(expand_float): Rework to remove dependendence on specific modes.
+	Can only use REAL_VALUE_LDEXP in certain configurations.
+	(expand_fix): Likewise.
+	If can't do operation unsigned, or signed into wider mode, emit a
+	sequence that compares operand with 2**(N-1) and, if larger,
+	subtracts 2**(N-1), converts, and adds it back.	
+	Protect from queue and force not memory at start.
+	* m88k.md (fixuns_truncdfsi2, fixuns_truncsfsi2): Deleted; now done
+	in expand_fix in optabs.c.
+
+	* combine.c (expand_field_assignment): Convert SET_SRC to mode of
+	INNER.
+	(simplify_shift_const, case ASHIFTRT): Don't use undefined initial
+	value of MASK.
+
+	* explow.c: Include insn-config.h, recog.h, and insn-codes.h.
+	(allocate_dynamic_stack_space): Rework to be more precise in required
+	alignment.  Must maintain alignment of stack to STACK_BOUNDARY at
+	all times (it must not be momentarily misaligned) and must align
+	returned address to BIGGEST_ALIGNMENT. 
+	* Makefile.in (explow.o): Show new includes.
+
+Tue Jun 11 07:22:54 1991  Matthew Self  (mself at next.com)
+
+	* m68k.md:  Change incorrect reference to -m68040-fp to -m68040-only.
+	Fix several spelling errors.
+
+	* m68k.md (fix_trunc*f*i2):  New insn's to replace fintrz on the
+	'040.  These emit a sequence of insn's to change the rounding mode
+	to round-to-zero, perform the truncation, and restore the rounding
+	mode. 
+
+Mon Jun 10 09:57:31 1991  Michael Tiemann  (tiemann at cygint.cygnus.com)
+
+	* c-lang.c (GNU_xref_{begin,end}): Add stub functions for xref info.
+
+	* cplus-decl.c (record_builtin_type): Add support for handling
+	builtin types' nicknames (e.g. "unsigned long" for "long unsigned
+	int").
+
+	* expmed.c (struct algorithm): Change array size from BITS_PER_WORD
+	to MAX_BITS_PER_WORD.
+	gcc.texinfo: Document MAX_BITS_PER_WORD.
+
+Mon Jun 10 07:45:17 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* combine.c (try_combine): When making an I1 from an I2 that is
+	a PARALLEL, give the new I1 the same INSN_UID as I2.
+
+	* recog.c (constrain_operands, case 'p'): Pass operand mode
+	(from match_operand) to strict_memory_address_p.
+
+	* m68k.md (andsi3): bclr does not set the condition codes in the
+	standard way.
+
+Sun Jun  9 11:16:24 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* reload.c (find_reloads): Swap preferred_class and pref_or_nothing
+	when we swap commutative operands.
+
+	* combine.c (subst, simplify_shift_const): Treat UDIV and MULT
+	with a second operand of a constant that is a power of two as the
+	appropriate shift if it feeds or is fed by a shift.
+
+	* expmed.c (expand_divmod): When searching for the best mode to
+	perform the computation, take into account the fact that we sometimes
+	do a shift, not a divide.
+
+	* expmed.c (emit_store_flag): Correctly handle "a = b < 0;" if A
+	is narrower than B.
+	Don't check for STORE_FLAG_VALUE equal to just the sign bit of
+	OP0 if the width of its mode is larger than HOST_BITS_PER_INT.
+	Use switch rather than if/elseif/elseif.
+
+	* combine.c (simplify_shift_const, shift cases): We were not forming
+	the mask correctly when VAROP is a LSHIFTRT and narrower than X;
+	simplify the mask formation by using significant_bits and
+	simplify_binary_operation.
+
+	* reload.c (make_memloc): Copy RTX_UNCHANGING_P from REG to MEM.
+	(find_reloads_address, find_reloads_address_1): Don't shortcut
+	reloading the address in reg_equiv_address; always call
+	find_reloads_address on it.
+
+	* recog.c (constrain_operands, case 'p'): Validate address if
+	testing strictly.
+
+	* out-alliant.c, out-m68k.md (output_move_double): Extraction of
+	parts of CONST_INT was backwards; these machines are words-big-endian.
+
+Sat Jun  8 12:19:26 1991  Michael Tiemann  (tiemann at cygint.cygnus.com)
+
+	* sparc.md: Remove special-case shift insns which load and shift
+	memory-based operands.  Combine now does this for us.  Also change
+	abs patterns so that they consistently print the negation followed
+	by the mov on a single line.
+
+	* reload1.c (choose_reload_regs): Cast `enum reg_class' values to
+	`int' when using them as array indicies.
+
+	* gnulib2.c (LONG_TYPE_SIZE): Don't inherit the definition of
+	LONG_TYPE_SIZE from tm.h, since that may be target_flag-specific.
+	Instead synthesize the value from `sizeof (long)'.
+
+	* cplus-gc.c (build_m_desc): Figure out whether the i_desc should
+	constitute a defn of its type or not.  Analogous to May 26 change
+	for instance variables.
+
+Sat Jun  8 07:11:26 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* combine.c (simplify_and_const_int): Detect and remove redundant
+	alignment operation.
+	(significant_bits, case REG): Realize that the stack pointer might
+	be aligned.
+	(significant_bits, case PLUS, MUNUS, MULT, DIV, UDIV): Track low-order
+	bits of zero as well as high-order zero bits (so we detect alignment
+	operations).
+	(record_value_for_reg): If updating a register, try to substitute its
+	old value into the expression for better tracking of values.
+
+	* a29k.md (fmac/dmac): Delete incorrect patterns.
+
+Thu Jun  6 19:08:29 1991  Sean Fagan  (sef at cygint.cygnus.com)
+
+	* final.c (output_source_line): Say we are on line number 1 if
+	sdb_begin_function_line is -1, not 0.
+
+Thu Jun  6 08:01:05 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* stor-layout.c (get_best_mode): Don't assume GET_MODE_SIZE (SImode)
+	is UNITS_PER_WORD; if SLOW_BYTE_ACCESS defined, try to return the
+	mode whose size is UNITS_PER_WORD.
+
+	* sparc.md (floatsisf2, floatsidf2): Add missing mode for
+	operand 1; use const_int_operand as predicate.
+
+	* cse.c (canon_reg): Add arg INSN; if replacing a pseudo with a hard
+	register or vice versa, use validate_change to ensure the insn
+	remains valid.
+	All callers changed; most pass zero since they validate replacement.
+	(cse_insn): Use validate_change on result of canon_reg when
+	required.
+
+	* c-common.c (combine_strings): Use WCHAR_BYTES instead of
+	UNIT_PER_WORD for the size of a wide char.
+
+	* emit-rtl.c (gen_lowpart_common): Always extract integral modes
+	from integer CONST_INTs and CONST_DOUBLEs.
+
+	* integrate.c (copy_for_inline, copy_rtx_and_substitute): Don't
+	try to extract a float from a fixed-mode CONST_DOUBLE.
+	(copy_for_inline, copy_rtx_and_substitute, restore_constants):
+	Declare target of REAL_VALUE_FROM_CONST_DOUBLE to be REAL_VALUE_TYPE.
+
+	* local-alloc.c (update_equiv_regs): Fix typo in testing
+	reg_basic_block.
+
+Wed Jun  5 09:15:09 1991  Ken Raeburn  (raeburn at watch.com)
+
+	* Eliminate unneeded binding levels when overloading template class
+	names:
+	* cplus-pt.c (overload_template_name): Accept second argument
+	classlevel, indicating that new decl should be pushed into current
+	class binding level; otherwise, assume current level is okay to use.
+	Callers changed.
+	(undo_template_name_overload): New second argument classlevel
+	indicates where binding for variable was made.  Callers changed.
+
+	* cplus-parse.y (structsp): Call undo_template_name_overload in all
+	appropriate cases.
+
+	* Get interface/implementation flags set properly on methods in
+	class templates, and use it:
+	* cplus-lex.c (store_pending_inline): If inside a class, walk up
+	through nested classes to top level looking for template parameters.
+	For class methods, use current interface flag settings rather than
+	flags for class.
+	(extract_interface_info): No longer static.
+	(do_pending_inlines, process_next_inline): Call
+	extract_interface_info to get interface flags set properly after
+	changing file names.
+	* cplus-pt.c (instantiate_class_template): Ditto.
+	(end_template_instantiation): Ditto.
+	(do_pending_expansions): If interface/implementation flags of
+	containing class are set, use them.
+	* cplus-tree.h (interface_unknown): Added declaration.
+
+Wed Jun  5 07:36:44 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* reload.c (find_reloads_address): Unshare a MEM if its address is
+	the address of a constant pool location.
+
+	* optabs.c (expand_binop): Fix typos in multi-word addition; had
+	MODE for SUBMODE.
+
+	* reload1.c (alter_reg): Correctly delete insn that makes a REG
+	equivalent to a MEM in the case where the MEM is the SET_DEST.
+
+	* a29k.md (negdf2): Add missing alternative in operands 2.
+	(movdi): Change "i" constraint to "n".
+	Split for constant integer as input; split cannot fail.
+	Correct typo in DEFINE_SPLIT (DFmode for DImode).
+	* out-a29k.c (gen_reg_or_integer_constant_operand): New function.
+
+	* configure: Fix typo in reference to tm-sun3-nfp.h.
+
+Wed Jun  5 06:56:10 1991  Matthew Self  (mself at next.com)
+
+	* c-parse.y, objc-parse.y (attrib): Always pass aligned attribute
+	through.  Return $1 on failure rather than NULL_TREE for consistency.
+
+	* c-common.c (decl_attributes): Warn if requested alignment is not
+	a power of two.  Also warn if decl is not a VAR_DECL or a FIELD_DECL,
+	since specifying alignment makes no sense for a TYPE_DECL, and is
+	not implemented for a FUNCTION_DECL.
+
+	* c-parse.y, objc-parse.y (initdcl, notype_initdcl): Call
+	decl_attributes before finish_decl in order for alignment attribute
+	to take effect.
+	
+	* varasm.c (assemble_variable): Warn if DECL_ALIGN is greater than
+	MAX_OFILE_ALIGNMENT, if defined.  This allows errors to be
+	detected with formats like a.out which support a maximum alignment
+	of 4.
+
+	* c-parse.y, objc-parse.y (component_declarator): Call decl_attributes
+	with correct args.
+
+	* stor-layout.c (layout_record, layout_union): Do not clamp struct
+	alignment at BIGGEST_ALIGNMENT, since individual fields may have
+	requested greater alignment than this.  This check shouldn't have
+	done anything anyway.
+
+	* c-parse.y (unary_expr):  When alignof is applied to an expression,
+	call c_alignof_expr so that we can check DECL_ALIGN instead of calling
+	c_alignof (TYPE_ALIGN (TREE_TYPE (expr))).
+
+	* c-typeck.c (c_alignof_expr):  New function to compute alignof for
+	expr's.  Returns DECL_ALIGN for VAR_DECL's and FIELD_DECL's.  Also
+	return 1 after reporting error about applying alignof to bitfields.
+
+	* c-tree.h (c_alignof_expr): Add declaration.
+
+	* varasm.c (assemble_variable):  MAX_OFILE_ALIGNMENT defaults to
+	BIGGEST_ALIGNMENT if not defined in config.h.
+
+Wed Jun  5 06:55:12 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* m88k.md (mov*): Change the interface to emit_move_sequence.
+	* out-m88k.c (emit_move_sequence): Similar to the sparc version.
+
+	* tm-m88k.h (SIZE_TYPE): Specify as unsigned int.
+
+	* xm-m88k.h (HOST_BITS_PER_LONGLONG): Define.
+
+Wed Jun  5 01:45:07 1991  Sean Fagan  (sef at cygint.cygnus.com)
+
+	* sdbout.c (sdbout_symbol):  don't output definition information for
+	a nested function inside the parent function; this makes COFF
+	assemblers upset.
+
+Tue Jun  4 17:35:13 1991  Sean Fagan  (sef at cygint.cygnus.com)
+
+	* function.c (trampoline_address): make the RTL_EXPR node temporary,
+	not momentary, so that the trampoline_list doesn't become garbage.
+	Fix made by jim wilson (wilson@cygnus.com).
+
+Tue Jun  4 09:40:59 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* expr.c (move_block_to_reg): Fix typo in last change.
+
+	* local-alloc.c (update_equiv_regs): Check for reg_n_refs == 2,
+	not loop_depth * 2.
+
+	* reorg.c (fill_simple_delay_slots): Clear INSN_DELETED_P on insns
+	placed in current_function_epilogue_delay_list.
+
+	* make-rs6000 (ALLOCA_FLAGS, ALLOCA_FINISH): Add override to
+	compensate for the fact that the RS/6000 C compiler has no -S.
+
+	* out-rs6000.c (easy_fp_constant): Use operand_subword.
+	(print_operand): Use INT_P and INT_LOWPART to allow accepting both
+	CONST_INT and CONST_DOUBLE for integers.
+
+	* rs6000.md (floatsidf2, floatunssidf2): Rework these to emit only
+	two insns, each of which has DImode or DFmode operands.  Then
+	split the funny DImode insn to generate it.
+	(fix_truncdfsi2, fixuns_truncdfsi2): Surround our call with
+	REG_LIBCALL/REG_RETVAL notes.
+	Use operand_subword.
+	(movsf, movdf): Correctly handle a pseudo passed during reload.
+	Use operand_subword.
+	Split moves involving "easy" FP constants.
+	(subtract-and-branch): Disable for now, to avoid output reload in jump.
+
+	* tm-rs6000.h (WCHAR_TYPE): Add definition.
+	(INT_REGNO_P): Fix typo; register 31 is a normal register.
+	(LEGITIMATE_CONSTANT_P): The only FP constants that are valid are
+	the "easy" ones.
+
+	* a29k.md (negdf2): Use XOR when not involving accumulator.
+	Add SCRATCH so we dont use gr122.
+	Handle case where input and output are same register.
+	(negsf2): Use SCRATCH.
+	(DImode operations): Use operand_subword, not gen_{low,high}_part.
+	(movsf, movdf, movdi): Always split if we can look inside CONST_DOUBLE.
+	Use operand_subword.
+	Don't split into separate words in DEFINE_EXPAND.
+	* out-a29k.c (in_operand): Account for fact that integer CONST_DOUBLE
+	is VOIDmode.
+	(extract_subword): Deleted.
+	(print_operand): Add macros INT_P and INT_LOWPART so we can accept
+	either CONST_INT or CONST_DOUBLE.
+
+	* romp.md (movdi, movdf, negsf2, negdf2): Use operand_subword and
+	operand_subword_force, instead of gen_{high,low}part.
+	Use force_const_mem instead of force_const_double_mem.
+
+	* m88k.md (movdi): Remove 'F' constraint; 'n' now includes integer
+	CONST_DOUBLE.
+	(anddi3, iordi3, xordi3): Likewise.
+	Use operand_subword to extract individual words.
+	* out-m88k.c (output_load_const_{float,double,dimode}):	Use
+	operand_subword.
+
+	* Makefile.in (emit-rtl.o): Now includes expr.h.
+	* calls.c (expand_call): Pass mode to move_block_to_reg.
+	* combine.c (subst, case SUBREG): Simplify SUBREG of hard register
+	and some SUBREGs of constants.
+	(gen_lowpart_for_combine): If object is desired mode, always return it.
+	Use gen_lowpart_common for most cases; just support MEM and
+	surrounding with a SUBREG here.
+	* cse.c (insert): CONSTANT_P includes CONST_DOUBLE.
+	(fold_rtx): Use MODE for GET_MODE (X).
+	(fold_rtx, case SUBREG): Handle simple cases of folding SUBREGs.
+	(fold_rtx, case MEM): Use operand_subword and gen_lowpart_if_possible
+	to get parts of constant instead of gen_lowpart and gen_highpart.
+	(gen_lowpart_if_possible): Use gen_lowpart_common for most cases.
+	* expr.c: Include expr.h.
+	(gen_lowpart_common): New function, from gen_lowpart.
+	(gen_lowpart): Use gen_lowpart_common for most cases; just handle MEM.
+	(gen_highpart): Deleted.
+	(subreg_lowpart_p): Test WORDS_BIG_ENDIAN in `if', not `#if'.
+	(operand_subword, operand_subword_force): New functions.
+	* explow.c (plus_constant): Handle adding CONST_INT to CONST_DOUBLE.
+	Rework to use switch statement.
+	Remove obsolete OLD_INDEXING code.
+	(plus_constant_for_output): Use plus_constant for most cases.
+	(break_out_memory_refs): Refine which constants get broken out.
+	* expmed.c (store_bit_field, extract_bit_field): Don't use
+	gen_highpart for multi-word fields; instead, loop and use
+	operand_subword.  We now support fields more than two words long.
+	(mask_rtx, lshift_value): Just pass high and low words to
+	immed_double_const; it will mask and choose CONST_INT vs. CONST_DOUBLE.
+	* expr.c (convert_move): Use operand_subword instead of gen_highpart.
+	Don't assume GET_MODE_SIZE (DImode) > UNITS_PER_WORD.
+	(move_block_to_reg): Add MODE arg.
+	Use operand_subword_force.
+	(move_block_from_reg): Use operand_subword.
+	(move_block_from_reg, move_block_to_reg, use_rgs):
+	Don't assume GET_MODE_SIZE (SImode) == UNITS_PER_WORD.
+	(emit_move_insn, emit_push_insn): Likewise.
+	Use operand_subword and operand_subword_force.
+	(expand_expr, case INTEGER_CST): Just call immed_double_const.
+	(expand_expr, cases FIX_TRUNC_EXPR, FLOAT_EXPR): Don't assume
+	GET_MODE_SIZE (SImode) == UNITS_PER_WORD.
+	(expand_builtin): Likewise.
+	(do_jump_by_parts_{greater,equality): Likewise.
+	Use operand_subword_force.
+	* expr.h (operand_subword): Remove declaration from here.
+	(validize_mem): Add missing declaration.
+	* final.c (final_scan_insn): If assembler code string is "#",
+	try to split insn.
+	Ignore insns with INSN_DELETED_P set.
+	(alter_subreg): Remove erroneous code for CONST_DOUBLE.
+	(output_addr_const): Integer CONST_DOUBLEs are now VOIDmode.
+	* fold-const.c (add_double): No longer static.
+	* integrate.c (copy_for_inline, copy_rtx_and_substitute):
+	Use validize_mem to validate force_const_mem's result.
+	(subst_constants, case SUBREG): Use operand_subword and
+	gen_lowpart_common instead of gen_lowpart and gen_highpart.
+	(restore_constants): Don't assume all CONST_DOUBLEs are floating.
+	Use validize_mem to validate force_const_mem's result.
+	* optabs.c (expand_binop,, expand_unop): Don't assume
+	GET_MODE_SIZE (SImode) == UNITS_PER_WORD.
+	Use operand_subword_force.
+	(operand_subword): Deleted from here.  New version in emit-rtl.c.
+	* recog.c (validate_replace_rtx_1): Check for any constant,
+	not just CONST_INT.
+	(constrain_operands, case 'm', 'o'): Any constant OK if strict < 0.
+	(constrain_operands, case 'E'): Must have host and target word sizes
+	the same.
+	(constrain_operands, case 's', 'n'): CONST_DOUBLE can be integer.
+	* reload.c (find_reloads, case 'm', 'o', 'E', 's', 'n'): Likewise.
+	Don't call force_const_double_mem; use force_const_mem instead.
+	(find_reloads_toplev): Likewise.
+	Use gen_lowpart_common to get low part of constant.
+	* rtl.h (gen_highpart, force_const_double_mem): Deleted.
+	(gen_lowpart_common, operand_subword, operand_subword_force):
+	New declarations.
+	* varasm.c (const_double_chain): Renamed from real_constant_chain.
+	(immed_double_const): For integer constants, perform any needed
+	masking and make either CONST_INT or CONST_DOUBLE.
+	(force_const_double_mem): Deleted; would need a mode arg added
+	which would make it almost identical to force_const_mem.
+	* out-vax.c (split_quadword_operands): Use operand_subword instead
+	of gen_lowpart and gen_highpart.
+
+	* function.c (find_replacement): New function.
+	(fixup_var_refs_insns): Pass pointer to listhead of (new)
+	fixup_replacement structures; if any entries were pseudos, copy from
+	memory to the pseudo.
+	(fixup_var_refs_1): New arg REPLACEMENTS; provide that arg in
+	recursive calls.
+	Use find_replacements to ensure we don't break any MATCH_DUPs.
+
+Tue Jun  4 05:07:53 1991  Michael Tiemann  (tiemann at cygint.cygnus.com)
+
+	* stmt.c (pushcase, pushcase_range): Take new parameter DUPLICATE.
+	Use this to store existing LABEL_DECL if LABEL is a duplicate.
+	* c-parse.y, cplus-parse.y, objc-parse.y, stmt.c: All callers
+	changed.
+
+Mon Jun  3 17:19:40 1991  Michael Tiemann  (tiemann at cygint.cygnus.com)
+
+	* cplus-expr.c (decl_in_memory_p): New function.
+	* cplus-typeck.c (mark_addressable): Test `decl_in_memory_p' instead
+	of testing memory_operand, since the DECL_RTL of a decl may be a
+	(MEM ...) by not a valid memory address.
+
+	* cplus-typeck.c (mark_addressable): When we decide that a static
+	const variable must go to memory, make sure that its rtl is
+	allocated from the correct obstack.
+
+	* cplus-decl.c (grokdeclarator): Replace undocumented BREAK_C_TAGS
+	#define control with comments explaining why or how it is correct
+	for GNU C++ to break C's notions of what a tag is.
+
+	* cplus-call.c (convert_harshness): Replace undocumented #if
+	AMBIGUOUS_WORKING control with a comment explaining the actions
+	where this control used to be.
+
+Mon Jun  3 15:07:47 1991  Sean Eric Fagan  (sef at kithrup)
+
+	* tm-i386.h (TRAMPOLINE_TEMPLATE):  Changed a 040 to 0xe0;
+	this is the proper code for a jmp [%eax] instruction.
+
+Mon Jun  3 08:07:42 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* cccp.c (initialize_builtins): Install __SIZE__TYPE__,
+	__PTRDIFF_TYPE__, and __WCHAR__TYPE__ as builtins.
+
+Sun Jun  2 18:18:19 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* flow.c (mark_set_1): Don't set LAST_MEM_SET from a MEM that has any
+	side-effects (such as auto-inc), not just volatile MEMs.
+
+	* rtlanal.c (reg_referenced_p): New function.
+	* combine.c (try_combine): Correct test for added_sets_1 to account
+	for case where I1 and I2 both feed I3.
+	(distribute_notes): Don't interpret setting a reg as a use of the
+	reg; use new reg_referenced_p and simplify code.
+
+	* flow.c (propagate_block): Ensure that LOOP_DEPTH is correct at all
+	insns in a basic block, otherwise reg_n_refs will be set incorrectly.
+
+	* recog.c (validate_replace_rtx_1): Don't change mode of memory
+	reference that is mode-dependent.
+	Don't make a MEM with a larger mode than original.
+
+	* combine.c (try_combine): Disable code to check MODES_TIEABLE_P
+	added May 20th and 22nd; this should not be needed now that
+	LIMIT_RELOAD_CLASS has been added to reload.
+
+	* flow.c (mark_set_1): Allow for the fact that stack pushes don't have
+	REG_INC notes.
+	* local-alloc.c (optimize_reg_copy): Likewise.
+	Don't change lives of hard registers #ifdef SMALL_REGISTER_CLASSES.
+	A USE of a register must not be changed.
+	(validate_equiv_mem): Don't make an equivalence to volatile MEMs.
+
+	* reorg.c (mark_set_resources): #ifdef PUSH_ROUNDING, mark SP as always
+	set since the insn might have a (pre_dec sp).
+
+Sun Jun  2 16:03:31 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* Makefile.in (libg_dir): Variable deleted.
+	(install-gnulib): Don't bother creating libg.a.
+
+	* cccp.c (size_type_string, etc.): Variables deleted.
+	(special_symbol): Use macros SIZE_TYPE, etc., directly.
+
+Sat Jun  1 12:54:05 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* Let tm.h specify types for size_t, ptrdiff_t and wchar_t.
+	(SIZE_TYPE, PTRDIFF_TYPE, WCHAR_TYPE): New params.
+	* cccp.c, c-decl.c: Provide default definitions of the new params.
+	* cccp.c (__SIZE_TYPE__, __PTRDIFF_TYPE__, __WCHAR_TYPE__): Builtins.
+	(special_symbol): Implement them based on new params.
+	* stddef.h (size_t, ptrdiff_t, wchar_t): Declare using those builtins.
+	* c-tree.h (ptrdiff_type_node): Declare variable.
+	* c-decl.c (init_decl_processing): Use *_TYPE params
+	to control setting of sizetype, wchar_type_node and ptrdiff_type_node.
+	* c-typeck.c (pointer_diff): Take result type from ptrdiff_type_node.
+
+	* configure (target1): Really change / to -.
+
+Sat Jun  1 02:49:04 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* cplus-lex.c (extract_interface_info): Now non-static.  Called
+	whenever INPUT_FILENAME changes.
+	* cplus-pt.c (instantiate_class_template): Call
+	`extract_interface_info' when switching files.
+	* cplus-input.c (getch): Ditto.
+
+	* combine.c (subst): Don't change the mode of memory access for
+	volatile memory.
+
+	* tm-sparc.h (CONST_COSTS): Fix typo in computing cost of
+	CONST_DOUBLE for DImode integers.
+
+Fri May 31 16:11:57 1991  Ken Raeburn  (raeburn at watch.com)
+
+	* cplus-lex.c (process_next_inline): Set line number and filename if
+	more inline data is to be processed.
+	(store_pending_inline): Treat FUNCTION_TYPE like METHOD_TYPE.  Use
+	current_class_type instead of extracting it from method type; the
+	two should be the same, and the latter doesn't work for statics.
+
+	* cplus-decl.c (start_decl): When constructing templates, use
+	original name of function rather than "mangled" name.  Look for
+	FUNCTION_DECL, not FUNCTION_TYPE, when deciding how to push the
+	new decl.
+	(start_method): Default inlining does not apply to template
+	expansions.
+
+	* cplus-pt.c (pending_template_expansions): Moved declaration to
+	start of file.
+	(tsubst): For FUNCTION_DECL, use original name of source, not
+	mangled name.
+	(instantiate_template): Local variables now non-static.  Fill in
+	pending-inline field of new decl, rather than template-info, and
+	chain into either pending-inlines or pending-template-expansions.
+
+	* cplus-typeck.c (build_x_function_call): If a template is found,
+	treat it as an overloaded declaration.
+
+Fri May 31 14:20:45 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* Makefile.in (all.cross): New target.
+	* configure: If cross-compiling, change `ALL' to use all.cross.
+
+Fri May 31 11:43:31 1991  Matthew Self  (mself at next.com)
+
+	* tm-next.h (EXTRA_SECTION_FUNCTIONS):
+	Add new constructor and destructor sections.
+	(MAX_OFILE_ALIGNMENT): Define as 2^15 for Mach-O.
+	(ASM_OUTPUT_ALIGN): Use .align, not .even.  Allow alignments > 2.
+	(CPP_PREDEFINES): Added -Dm68k since some code expects this.
+
+Fri May 31 05:41:51 1991  Michael Tiemann  (tiemann at cygint.cygnus.com)
+
+	* cplus-class.c (pushclass): New argument value for MODIFY accepted.
+	* cplus-decl2.c (build_push_scope): Call `pushclass' with MODIFY == 3.
+
+	* cplus-decl.c (finish_function): Set TREE_PUBLIC and TREE_EXTERNAL
+	bits on functions according to #pragma interface/implementation,
+	regardless of whether or not the function's inline.  This fixes the
+	bug of needless code replication with -fno-inline.
+
+Thu May 30 17:39:53 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* expr.c (expand_expr):
+	Don't lose volatility of fields in COMPONENT_REF.
+
+Thu May 30 17:36:45 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* cse.c (count_reg_usage, delete_dead_from_cse): New functions.
+	* toplev.c (rest_of_compilation): Call delete_dead_from_cse immediately
+	after the first cse pass.
+
+	* local-alloc.c (validate_equiv_mem_from_store, validate_equiv_mem):
+	New functions, to find cases where a REG is equivalent to a MEM.
+	(optimize_reg_copy): New function.
+	(update_equiv_regs): Call these new functions.
+	Look for a register used in only one basic block being stored into
+	memory.
+	Keep track of loop depth so we can find regs used only once, but
+	inside a loop.
+	* reload1.c (reload): Use single_set when looking for an insn
+	that initializes a register.
+	If making a REG equivalent to a MEM, the insn with SET_DEST being
+	the register isn't always the one making the equivalence, since the
+	equivalence might be occurring due to a store into MEM; in that
+	case set reg_equiv_init to the latter insn.
+
+Thu May 30 14:23:01 1991  Ken Raeburn  (raeburn at watch.com)
+
+	* Pending expansions processed at end-of-file can be processed out
+	of order, so freeing the associated data from the obstacks is not
+	possible.
+	* cplus-tree.h (struct pending_inline): New field can_free
+	indicates whether to free the text after processing it.
+	* cplus-lex.c (do_pending_inline, process_next_inline): If
+	can_free flag is set, specify inline-text obstack, otherwise null
+	pointer.
+	(cons_up_default_function): Clear flag.
+	(reinit_parse_for_method): Set it.
+	(store_pending_inline): Clear it when changing obstacks.
+	(pending_template_obstack): Deleted.  References changed to use
+	permanent_obstack.
+
+	* cplus-lex.c (store_pending_inline): Set DECL_PENDING_INLINE_INFO
+	value after swapping obstacks, not before.
+
+Thu May 30 07:23:18 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* va-sparc.h: Has to be a char * to be compatible with Sun.
+	i.e., we have to pass a `va_list' to vsprintf.  Also, fixed
+	bug in passing vararg structs.
+
+Thu May 30 00:32:18 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* configure: Delete Makefile.tem before writing it.
+
+	* stor-layout.c (layout_record):
+	Ignore PCC_BITFIELD_TYPE_MATTERS for incomplete type.
+
+	* fixincludes (stdtypes.h): Handle wchar_t like the other types.
+
+	* function.c (assign_parms): Don't declare args_so_far register.
+
+Wed May 29 15:13:05 1991  Ken Raeburn  (raeburn at watch.com)
+
+	* cplus-tree.def (TEMPLATE_PARM_IDX): Deleted.
+	(TEMPLATE_TYPE_PARM): New node type, looks like a type node.
+	(TEMPLATE_CONST_PARM): New node type, looks like a const node.
+
+	* cplus-tree.h (IDENTIFIER_TYPE_VALUE_PTR): Inlined under gcc.
+	(TYPE_IDENTIFIER_PTR): Ditto.
+	(DECL_NESTED_TYPENAME_PTR): Ditto.
+	(struct lang_type): New bitfield `use_template'.
+	(CLASSTYPE_USE_TEMPLATE): Accessor macro for above.
+	(struct lang_decl): New field `template_info'.
+	(DECL_TEMPLATE_INFO): Accessor macro for above.
+	(TEMPLATE_EXPANSION_NAME_P): Deleted.
+	(push_overloaded_decl_top_level): Added declaration.
+	(TEMPLATE_TYPE_TPARMLIST, TEMPLATE_TYPE_IDX,
+	TEMPLATE_TYPE_SET_INFO, TEMPLATE_CONST_TPARMLIST,
+	TEMPLATE_CONST_IDX, TEMPLATE_CONST_SET_INFO): New macros for
+	accessing fields of TEMPLATE_..._PARM nodes.
+	(struct pending_inline): New fields for names and values to bind
+	to them while processing.
+	(struct template_info): Definition moved here from cplus-pt.c.
+	(instantiate_template): Added declaration.
+	(instantiate_class_template): Ditto.
+	(processing_template_{decl,defn}): New variable declarations.
+
+	* print-tree.c (print_node): Provide missing argument to
+	print_node for `bitpos' field.  Display `virtual' flag, and (for
+	function and method types) `class' field; these are only used by
+	C++ that I'm aware of, but are defined in common code, so they
+	should be displayed here.
+
+	* cplus-parse.y (template_def): Separate set of derivations, for
+	class and function templates.  Template_def is a type of extdef;
+	extern_lang_string before template_def is not permitted.
+	(fn_tmpl_end): New nonterminal, anything that signals the end of
+	the portion of a template that we should parse.
+	(yyprint): Define only if YYDEBUG.  Handle TYPESPEC.
+	(datadef): Complain at class template override declaration if that
+	specialization has already been produced by expansion.  Template
+	definitions no longer belong here.
+	(tmpl.2): Always call instantiate_class_template; let it decide
+	whether or not to go through with it.
+	(template_instantiation): Put decl in global scope only if not
+	already there.
+	(typespec, scoped_typename): Scoped typename inside template type
+	should be a scoped_typename, not a typespec.  However, a
+	template_type should be allowed as a typespec.
+	(structsp): Don't undo template name overload here.  Deleted
+	derivation from template_type.
+	(named_class_head_sans_basetype): Don't overload template name.
+	(LC): Do it here.
+	(notype_declarator): For scoped_id derivations, don't call
+	build_push_scope if the scoped_id is a SCOPE_REF.
+	(scoped_id): Moved old typespec-from-template_type rule here.
+	Call resolve_scope_to_name only if template parms aren't involved.
+
+	* cplus-pt.c (struct template_info): Definition deleted.
+	(templates, current_template_info): Variables deleted.
+	(processing_template_{decl,defn}): New variables.
+	(push_template_decls, pop_template_decls): Accept parmlist and
+	arglist as separate arguments, instead of deriving both from the
+	template.  If class_level is non-zero, push and pop a level,
+	making it transparent to tags.  Removed some pointless checks from
+	pop_template_decls that are only needed in push_template_decls,
+	and some assertions from both.  Callers changed.
+	(uses_template_parms): Return non-zero iff argument refers to any
+	TEMPLATE_*_PARM nodes.
+	(tsubst): Walk tree, substituting for template parms, returning
+	new tree.
+	(type_unification): Rewritten a bit, to make it work.  New
+	argument nsubsts is pointer to place to record number of
+	substitutions made when matching.
+	(unify): Renamed from unify1.  Rewritten completely, to work.
+	Still may need extending for some tree node types.
+	(do_pending_expansions): At end-of-file, expand any templates not
+	yet expanded which were actually needed.  Needs work to accomodate
+	latest specs.
+	(process_template_parm): Simplified slightly.  Non-type parms
+	should be marked read-only; aggregate types are not allowed, since
+	equality checks don't work.
+	(end_template_parm_list): Moved to after process_template_parm.
+	Push a level, and push decls for TEMPLATE_*_PARMs.  Set
+	processing_template_decl flag.
+	(end_template_decl): For non-class templates, build a
+	TEMPLATE_DECL and store the regular decl in its result field.
+	Context and other values get copied over too.  Call poplevel to
+	get rid of the TEMPLATE_*_PARM decls, and call
+	dont_forget_overload to avoid losing the declaration later.  Clear
+	processing_template_decl flag.  Call get_pending_sizes, so later
+	function compilation doesn't try to evaluate sizes of templates.
+	(mangle_class_name_for_template): Convert type/non-type check from
+	switch to if test.  Added support for ENUMERAL_TYPE, REAL_TYPE,
+	and POINTER_TYPE parms.
+	(instantiate_class_template): Renamed from old
+	instantiate_template.  Don't expand if type size is set, or if
+	being-defined flag is set, or use-template flag is non-zero.  If
+	other-template parms are used in the parm list, construct a simple
+	RECORD_TYPE node and return it.  Catch case of template declared
+	but not defined before use.  Renamed argument from class to
+	classname.  Set processing_template_defn flag.
+	(instantiate_template): New routine; constructs new decl node
+	given TEMPLATE_DECL node and template arg vector.
+	(end_template_instantiation):  Set use-template field to 2 ("did
+	use template").  Clear processing_template_defn flag.
+	(reinit_parse_for_template): Get template-info ptr from decl node.
+	Store template parm vector in it.
+	(pending_template_expansions): List of templates that may need
+	expanding later for function or class data definitions.
+
+	* cplus-method.c (build_overload_value): Ensure tree code is
+	PARM_DECL.  Handle ENUMERAL_TYPE like INTEGER_TYPE.  For DImode
+	values, compare against integer_zero_node instead of constructing
+	another one.  Added support for POINTER_TYPEs.  If not
+	REAL_IS_NOT_DOUBLE, support real values as well.
+	(build_overload_name): Accept TEMPLATE_*_PARM nodes, but generate
+	a string that should cause some assembler errors.
+
+	* cplus-ptree.c (print_lang_decl): Retrieve template-info from its
+	new place.
+	(print_lang_type): For TEMPLATE_TYPE_PARM, print its (short) info
+	and return.  For RECORD_TYPE, print use-template and interface-*
+	fields.
+
+	* cplus-search.c (push_class_decls): Don't call
+	push_template_decls; the bindings of template parameter names
+	should be associated with the template body, not with the class.
+	Do overload the template name, however.
+	(pop_class_decls): Don't call pop_template_decls.
+
+	* cplus-call.c (build_method_call): Changed to recognize
+	constructor of template class.
+	(build_overload_call): Add in number of template substitutions as
+	extra cost of a candidate function.  For template decls, try
+	unification and instantiation before evaluating cost of result.
+	This too is incorrect in terms of the spec, but it's a starting
+	point for later work.
+
+	* cplus-class.c (finish_struct): If structure is named, undo
+	overload of its name as a template.
+	(pushclass): If prev_class_type was a template class, pop it; the
+	decls are handled wrong and should be re-entered.
+
+	* cplus-decl.c (poplevel): Assert that the current level is not
+	global.
+	(push_to_top_level): Include global scope when looking for old
+	values, because class bindings aren't listed in any other one
+	place.
+	(push_overloaded_decl_top_level): New function; like
+	push_overloaded_decl, but places decl in global binding level.
+	(dont_forget_overload): New function; removes decl from list of
+	overloads to be forgotten when scope is exited.
+	(start_decl): If template parms are used, construct a
+	TEMPLATE_DECL node referencing the current decl.  For function
+	templates, call push_overloaded_decl; for class template members,
+	chain them into the class template definition.
+	(grokdeclarator): Don't try determining size of a
+	TEMPLATE_CONST_PARM node.  For template class-data decls,
+	construct a phony VAR_DECL node and return it.
+
+	* cplus-decl2.c (grokfield): For static class data, use
+	build_overload_name result, instead of copying class name, since
+	the latter could be a human-readable template class name.  (If
+	NEW_OVERLOAD_SCHEME is not defined, do this only if the class has
+	a template-derived name.)
+
+	* cplus-lex.c (pending_template_obstack): New variable; obstack
+	for pending-template stuff to be saved to end-of-file.
+	(init_lex): Initialize it.
+	(default_def): New variable; used for default definition of copy
+	constructors and destructors.
+	(do_pending_inlines): Figure out whether text is in an obstack,
+	and which one, for calling feed_input.  Push template decls if
+	needed, as specified in pending_inline data.  Pass current
+	pending_inlines pointer back in PRE_PARSED_FUNCTION_DECL instead
+	of next.
+	(process_next_inline): Ditto.  Pop pending inline data if needed.
+	(store_pending_inline): New function.  Decides which obstack to
+	store a pending definition on, and which list to chain it into.
+	(reinit_parse_for_method): Call it.
+	(reinit_parse_for_block): If character passed in is '=', look for
+	a semicolon to end the block; don't require a {} block.  Don't pad
+	to 8 bytes on USG, since we aren't feeding input via stdio any
+	more.  Also, use newlines instead of # directives for advancing
+	line number only a few lines.
+	(cons_up_default_function): Punt padding for USG stdio, since we
+	aren't using it any more.  Use default_def for definition.  Call
+	store_pending_inline to save it away.
+	(identifier_type): For TEMPLATE_DECL, DECL_RESULT field non-null
+	indicates a non-type template, so don't return PTYPENAME.
+	(yylex): If end-of-file and input isn't redirected, call
+	do_pending_expansions and maybe start yylex over.  Don't check
+	TEMPLATE_EXPANSION_NAME_P; a proper name transformation system
+	will eliminate conflicts.  Try for SCOPED_TYPENAME with PTYPENAME
+	too.
+
+Wed May 29 11:48:34 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* cccp.c (do_include): Check that ->control_macro is non-zero.
+
+	* gcc.c (process_command): Use `error' in last change.
+
+Wed May 29 11:10:12 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* m88k.md (movdi): Accept CONST_INT.
+	* out-m88k.c (output_load_const_dimode): Accept CONST_INT.
+	(output_call): Don't use #plt for jsr.
+
+Wed May 29 00:51:36 1991  Michael Tiemann  (tiemann at cygint.cygnus.com)
+
+	* cplus-type2.c (build_functional_cast): Give error if functional
+	cast is missing argument.
+
+	* cplus-tree.h (interface_unknown): Add a declaration for this
+	variable.
+
+	* cplus-type2.c (store_init_value): Normally initialized PIC data
+	must be laid into the text segment and then copied into the data
+	segment.  But cecause of special things we do for ctors and dtors
+	(the only things that can reference such things), we can leave
+	vtables in initialized data space.
+
+	* cplus-decl.c (finish_decl): Use #pragma interface knowledge if
+	available for processing initialized variables of type const.
+
+Tue May 28 18:39:20 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* sched.c ({true,anti,output}_dependence): Correct MEM_IN_STRUCT_P
+	code; only avoid conflict if MEM_IN_STRUCT_P ref has varying address.
+
+	* protoize.c (stat): Remove declaration of stat; it is defined
+	differently (no const in arg 1) on some machines.
+
+	* combine.c (simplify_shift_const): Avoid infinite loops by quitting
+	when COUNT becomes zero; delete now-unnecessary tests on COUNT.
+
+	* flow.c (last_mem_set): New variable.
+	(propagate_block): Initialize it.
+	Show calls can change memory.
+	(insn_dead_p): Remove unneeded arg STRICT_LOW_OK; don't treat
+	STRICT_LOW_PART differently than ZERO_EXTRACT.
+	All callers changed.
+	If insn stores into the same, nonvolatile, MEM as recorded in
+	last_mem_set, it is dead.
+	(mark_set_1): If writing into register mentioned in last_mem_set or
+	writing into memory, clear last_mem_set.
+	Record last MEM written.
+	(find_auto_inc): New function, from mark_used_regs.
+	Add support for pre-increment and pre-decrement.
+	(mark_used_regs, case MEM): Clear last_mem_set.
+	Call find_auto_inc; move code to there.
+	(mark_used_regs, case SET): Don't call recursively on MEM if it is
+	SET_DEST, instead call find_auto_inc ourselves.
+
+Tue May 28 17:29:52 1991  Micheal Tiemann  (tiemann at wookumz.gnu.ai.mit.edu)
+
+	* gnulib1.c (__fixsfsi, __cmpsf2, __extendsfdf2): Add declarations
+	for intify.
+
+	* gcc.c (default_compilers): Accept `.cxx' as a C++ extension.
+
+Tue May 28 17:05:28 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* m88k.md (movstrsi): Pass original MEM expressions.
+	* out-m88k.c (expand_block_move, block_move_{sequence,no_loop,loop}):
+	Use original MEM expressions to set RTX_UNCHANGING_P, MEM_VOLATILE_P,
+	and MEM_IN_STRUCT_P.
+
+	* out-m88k.c (emit_bcnd): Use bxx when optimizing so jump_optimize
+	will work on more cases.  Change this back when jump_optimize uses
+	get_condition to find the values being compared.
+
+	* m88k.md: Don't use operand0 or operand1.
+
+Tue May 28 16:00:56 1991  Micheal Tiemann  (tiemann at wookumz.gnu.ai.mit.edu)
+
+	* emit-rtl.c (try_split): Make sure `after' exists before checking
+	to see if it is a BARRIER.
+
+Tue May 28 15:08:44 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* gcc.c (process_command): Warn if -x follows last input file.
+
+	* cccp.c: Don't include file twice if a #ifndef would make it a no-op.
+	(struct file_name_list): New field, control_macro.
+	Initialize it where these structures are created.
+	(struct if_stack): Likewise.
+	(do_include): If file already known, check its control macro if any.
+	Don't include the file if the macro is now defined.
+	(do_xifdef): Detect case of successful #ifndef at start of file.
+	(condition_skip): Accept macro name as new arg.  Record in if_stack.
+	(do_endif): Detect being effectively at end of file.
+	(record_control_macro): New function.  Called from do_endif.
+
+	* calls.c (store_one_arg): Set used after calling push_rounding.
+
+	* sparc.md (floating move peepholes): Allow `r' for operand 2.
+
+	* arm.md, tm-arm.h, out-arm.c, xm-arm.h: New files.
+	* configure (arm): New alternative.
+
+Tue May 28 11:53:21 1991  Michael Meissner  (meissner at osf.org)
+
+	* tm-decstatn.h (CPP_PREDEFINES): Add Ultrix 4.2 support.
+
+	* tm-mips.h (cmp_type, branch_cmp, branch_type): Global variables
+	and type to record what type of comparison is being done.
+	(mips_print_operand_punct): New array to specify whether a
+	character is valid for print_operand as punctuation.
+	(set_nomacro, set_noat, set_noreorder): New variables to record
+	whether a .set nomacro, .set noat, or .set noreorder has been
+	done.
+	(dslots_{filled,total}_{load,jump}): New global variables to
+	remember how many delay slots exist and are filled for the -mstats
+	option.
+	(CC1_SPEC): Combine %{O:...} %{O*:...} cases.  For -G32, pass -G
+	32.  Add dummy pattern for -save-temps to avoid error message.
+	(DBX_DEBUGGING_INFO): Define this all the time.
+	(SDB_ALLOW_FORWARD_REFERENCES): Define this for MIPS ECOFF support.
+	(SDB_ALLOW_UNKNOWN_REFERENCES): Define this for MIPS ECOFF support.
+	(TARGET_SWITCHES): Add -mstats to print interesting statistics.
+	Add -mmemcpy to force memcpy to be called.  Add -mdebug[fghij].
+	Add -mno- version of switches.
+	(DATA_ALIGNMENT): Align all char/short arrays/unions/structures,
+	rather than just char arrays.
+	(BYTE_LOADS_ZERO_EXTEND): Define this.
+	(CONST_OK_FOR_LETTER_P): 'N' returns true if power of 2.
+	(EXTRA_CONSTRAINT): Redefine 'Q' to be 1 word memory references,
+	'R' to be multiword memory references.
+	(struct frame_info): Add initialized field.
+	(current_frame_info): New global structure to hold frame info.
+	(INITIAL_FRAME_POINTER_OFFSET): Use current_frame_info.
+	(INIT_CUMULATIVE_ARGS): Pass LIBNAME to init_cumulative_args.
+	(DELAY_SLOTS_FOR_EPILOGUE): Define this to fill j $r31 delay slot.
+	(ELIGIBLE_FOR_EPILOGUE_DELAY): Ditto.
+	(ENCODE_SEGMENT_INFO): Don't flag references to 0-sized arrays as
+	being in the small data segment.
+	(CONST_COSTS): Reword to be more accurate.
+	(RTX_COSTS): Define this.
+	(ADDRESS_COST): Define this.
+	(CLASS_CMP_OP, CLASS_EQUALITY_OP, CLASS_UNS_CMP_OP): New bits for
+	rtx_classify to classify various comparison operators.
+	(FINAL_PRESCAN_INSN): Define this to collect info for -mstats.
+	(NOTICE_UPDATE_CC): Only do CC_STATUS_INIT if the insn is a
+	comparison.
+	(EXTRA_CC_MODES): Define new modes CC_EQmode, CC_FPmode, CC_0mode.
+	(EXTRA_CC_NAMES): Define this.
+	(SELECT_CC_MODE): Define this.
+	(PRINT_OPERAND_PUNCT_VALID_P): Redefine this to index into
+	mips_print_operand_punct.
+	(DBR_OUTPUT_SEQEND): Reset .set reorder, .set macro as appropriate.
+
+	* out-mips.c (branch_cmp, branch_type): New Global variables
+	and type to record what type of comparison is being done.
+	(mips_print_operand_punct): New array to specify whether a
+	character is valid for print_operand as punctuation.
+	(set_nomacro, set_noat, set_noreorder): New variables to record
+	whether a .set nomacro, .set noat, or .set noreorder has been
+	done.
+	(dslots_{filled,total}_{load,jump}): New global variables to
+	remember how many delay slots exist and are filled for the -mstats
+	option.
+	(reg_or_0_operand): Rewrite to add support for CONST_DOUBLE.
+	(mips_const_double_ok): Allow normal FP constants (not Infinity,
+	Nan, etc) to be used as operands when using the MIPS assembler.
+	(simple_memory_operand): Combine GP memory references from
+	gp_memory_operand.  Delete gp_memory_operand.
+	(equality_op): Return true if EQ or NE.
+	(cmp_op): Return true if comparison operator.
+	(uns_cmp_op): Return true if unsigned comparison.
+	(mips_move_1word): New name for mips_move_instructions.  Also, loads
+	of HImode/QImode use unsigned loads, rather than signed loads, so
+	that BYTE_LOADS_ZERO_EXTEND can be defined.  Use %z to get name of
+	$0, instead of hardwiring it.  Explicitly use lui where appropriate.
+	(mips_move_2words): New name for mips_move_2words_instructions.  Use
+	%z to get name of $0, instead of hardwiring it.
+	(mips_address_cost): New function to define ADDRESS_COST macro.
+	(gen_conditional_branch): New function to generate all of the tests
+	and branches.
+	(block_move_sequence): New function to generate straight line code
+	for block moves.
+	(block_move_call): New function to set up a call to memcpy/bcopy as
+	appropriate for block moves.
+	(expand_block_move): New function which is called from the movstrsi
+	define_expand, to set up block moves.  At present, unless -mmemcpy
+	is used, moves of less than 32 bytes, get straight line code, all
+	others get a call.
+	(init_cumulative_args): Take libname as third argument.
+	(function_arg_partial_nregs): Fix bug, to not return a negative
+	number when passing small structs in registers.
+	(compare_collect, compare_restore): Remove these functions, since
+	they are no longer called.
+	(override_options): Initialize mips_rtx_classify for all of the
+	comparison operator bits.  Initialize mips_print_operand_punct to
+	return TRUE for each of the valid punctuation characters used in
+	print_operand.
+	(print_operand): %X now prints 32 bit ints in hex format.  %z now
+	prints $0 if the operand is the constant integer 0.  %(, %) now turn
+	on/off both .set noreorder/.set nomacro.  %<, %> turns on/off .set
+	nomacro.  %* turns on both .set noreorder and .set nomacro if
+	filling delay slots.  %! turns on .set nomacro if filling delay
+	slots.
+	(compute_frame_size, save_restore, function_prologue,
+	function_epilogue): Change the calling sequence of
+	compute_frame_size to save everything in a global structure, which
+	has an initialized field to indicate that compute_frame_size needs
+	to be called.
+	(function_prologue): INIT_CUMULATIVE_ARGS now takes 3 args.
+	(function_epilogue): If current_function_epilogue_delay_list is
+	non-null, use that to fill the final delay slot.  Also, make sure
+	the various asm .set's are reset properly.  Write interesting
+	statistics out to stderr if -mstats.
+	(mips_epilogue_delay_slots): New function to return # of delay slots
+	the epilogue needs.
+	(null_epilogue):  Return true if the function has a null epilogue,
+	which allows the optimizer to omit jumps to the final j $31 if no
+	stack was created.
+
+	* mips.md (type attribute): Redo how the type attributes work, and
+	change some names.
+	(mode attribute): New attribute to describe the insn's result mode.
+	(length attribute): New attribute to give insn length in words.
+	(dslot attribute): New attribute to return whether an insn needs a
+	delay slot.
+	(define_delay): Use dslot and length attributes to determine if a
+	delay slot is needed.
+	(define_function_unit): Define all of the function units now.
+	(all patterns): Provide new attribute definitions.
+	(all memory reference patterns): modify alternatives to use 'Q' for
+	1 word instructions, 'R' for multiword instructions.
+	(unnamed patterns): Provide names for all patterns, so that -dp will
+	pinpoint exactly which pattern is used.
+	(*divsi3, *divmodsi4, *modsi3): If optimizing and not -mdebugc, use
+	the *divmodsi4 patterns, so that the opimizer will only use 1 divide
+	if doing a = b / c; d = b % c;  This replaces the peepholes, which
+	previously were used for this.  If not optimizing, use the normal
+	div/mod patterns.
+	(zero_extendqihi2, extendqihi2): Allow zero/sign extending from
+	memory.
+	(fixuns_trunc{df,sf}si2): Use generator patterns to generate
+	appropriate branches.
+	(movsi_ulw, movsi_usw): New patterns to generate the appropriate
+	unaligned load/store for use in the block move expansion.
+	(mov*): Provide all possible combinations of moves.
+	(movstrsi): New pattern to generate block moves.
+	(negsi2): Change to a define_expand, which uses minus.
+	(one_cmpsli2): Change to a define_expand, which use the nor pattern.
+	(cmp*, b*): Redo comparison/branch completely to save things in
+	global variables, call the common C code to expand the branch, and
+	provide match_operators to do the actual branch.
+	(s*): Provide for the ability to set a register with an integer
+	comparison, without using a branch.
+
+	* make-decrose (AUX_OUTPUT2): Delete macro, since aux-output.c is
+	always compiled separately now.
+	(LANGUAGES): Suppress G++, Objc temporarily.
+	(cse.o): Rebuild cse if the config files change, to get new cost
+	functions, no longer rebuild calls/function since the FUNCTION_ARG
+	macros just call functions in out-mips.c.
+	(SRCS): Change $(AUX_OUTPUT2_SRC) to aux-output.c.
+
+	* make-mips (AUX_OUTPUT2): Delete macro, since aux-output.c is
+	always compiler separately now.
+	(CONFIG2_H): Add rules to rebuild selected modules when the
+	tm-mips.h file changes.
+	(mips-tfile): Rules to build mips-tfile.
+	(mips-tdump): Rules to build mips-tdump.
+	(LANGUAGES): Suppress G++, Objc temporarily, build mips-tfile.
+
+	* mips-tfile.c (whole file): New file to put the MIPS specific debug
+	information into the object file, after the assembler has been run.
+	This is needed because the MIPS assembler provides no method of
+	setting up the debug information for local variables.  This is
+	enabled by the make-mips Makefile modifier.
+
+	* mips-tdump.c (whole file): New file to dump the contents of the
+	MIPS ECOFF symbol table in a symbolic format.  This is not currently
+	built by default, but make-mips contains rules to build it.
+
+	* tm-decrose.h (MD_EXEC_PREFIX): Change to use the test prefix
+	/usr/ccs/gcc-2.00/gcc- instead of the release prefix /usr/ccs/gcc.
+	(WCHAR_TYPE_SIZE): Define as 16.
+	(WCHAR_UNSIGNED): Define as 1.
+	(DBX_DEBUGGING_INFO): Define moved to tm-mips.h.
+
+
+Tue May 28 06:26:44 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* expmed.c (store_bit_field, extract_bit_field): If -fforce-mem
+	specified, copy OP0 into register (and back again, for store).
+
+	* sched.c (memrefs_conflict_p, {true,anti,output}_dependence): Add
+	missing parens.
+
+	* reload.c (find_reloads): Turn usage of reg_preferred_class back on
+	now that the code has been refined.
+
+Mon May 27 12:41:14 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* c-typeck.c (build_binary_op_nodefault): Set converted for shifts,
+	so op1 is not converted to the result type.
+	Clean up some warning messages.
+
+	* expr.c (expand_expr): Use temp stack slot for BLKmode SAVE_EXPR.
+
+	* Makefile.in (alloca.o): Use new vars ALLOCA_FLAGS and ALLOCA_FINISH.
+
+Mon May 27 05:42:20 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* sched.c ({read,true,anti,output}_dependence): Remove unused arg INSN.
+	All callers changed.
+
+	* combine.c (subst, case PLUS): Fix typo in (plus (plus X C) Y) case.
+	(subst, case MULT): Distribute MULT over PLUS to try to simplify it.
+
+Mon May 27 05:15:16 1991  Michael Tiemann  (tiemann at cygint.cygnus.com)
+
+	* tm-sparc.h (GO_IF_LEGITIMATE_ADDRESS): Don't accept a SYMBOL_REF
+	sum if FLAG_PIC is not 1.  This forces the -fPIC to take effect,
+	even when the optimizer knows how to stitch together HIGH and LO_SUM
+	combinations.
+	(PRINT_OPERAND): Move body to out-sparc.c.
+	* out-sparc.c (print_operand): New function, implementing actions of
+	old PRINT_OPERAND macro.  Comments written for all cases.
+	(reg_unused_after): Don't do anything special with JUMP_INSNs.  Only
+	do something special with CALL_INSN if REGNO is a call-used reg.
+
+	* cplus-type2.c (store_init_value): Back out 23 Feb change, which
+	was completely backward.
+
+	* dbxout.c, cplus-dbxout.c (dbxout_parms): Also test that TREE_TYPE
+	(PARMS) is not ERROR_MARK_NODE.
+
+	* cplus-init.c (build_up_reference): Check FLAGS parameter to see if
+	we can accept building a reference to a constructor-generated
+	temporary.
+	(various places): Change calls to `build_up_reference' that used to
+	use an explicit `1' to use LOOKUP_PROTECT instead.
+	(build_offset_ref): Use IDENTIFIER_TYPE_VALUE macro to the the type
+	associated with CNAME.
+
+	* cplus-class.c (build_vbase_path): Fix 11 May change by only
+	changing TREE_TYPE (EXPR) if NULL_EXPR.  We might build different
+	vbase paths for the same expr in multiple inheritance
+	initialization.
+
+	* Makefile.in: Change sed script so it matches '^# ' instead of just
+	'^#'.  This allows processing of md files with #if/#endif controls
+	in their C function bodies.
+
+	* cplus-tree.c (build_cplus_new): Set TREE_SIDE_EFFECTS on RVAL.
+
+	* stmt.c (warn_if_unused_value): Don't warn about EXIT_EXPRs.
+	(expand_decl_cleanup): Add missing type declarations for parameters.
+
+	* cplus-call.c, cplus-class.c, cplus-dbxout.c, cplus-edsel.c: Include
+	stdio.h after cplus-tree.h since the latter references printf.
+	* cplus-search.c, cplus-xref.c: Likewise.
+	* cplus-class.c (prev_class_type): Not static; defined in cplus-tree.h.
+	* cplus-decl.c (builtin_function, auto_function): Don't put & in
+	front of function name.
+	* cplus-typeck.c (comptypes,comp_target_types): Likewise.
+	* cplus-search.c (report_ambiguous_mi_virtuals): Likewise, for arrays.
+
+Sun May 26 22:47:35 1991  Michael Tiemann  (tiemann at cygint.cygnus.com)
+
+	* cplus-decl.c (make_temporary_for_reference): New function.  Split
+	out code from `grok_reference_init' so we could call it in two
+	places: where it was called before, and when initializing a
+	reference through a constructor for a temporary.
+	(grokdeclarator): Give error message instead of aborting if user
+	gave method qualifiers for function decl.
+	(start_function): Switch to temporary obstack before computing
+	destructor and constructor labels, and before building the
+	function's RESULT_DECL.
+
+	* cplus-decl.c (store_parm_decls): Make a cleanup that controls the
+	action of the garbage collector.  This ensures that the call to
+	__gc_pop doesn't get skipped in the function issues a return stmt.
+	* cplus-gc.c (expand_gc_prologue_and_epilogue): Work with new
+	cleanup model.
+
+	* cplus-gc.c (build_i_desc): Figure out whether the i_desc should
+	constitute a defn of its type or not.
+
+	* cplus-typeck.c (c_expand_return): Look through TARGET_EXPR as well
+	as NEW_EXPR for returning addresses of local variables.
+
+	* reload.c (find_reloads): Intialized `goal_alternative_swapped'
+	where `swapped' is initialized to zero.
+
+Sun May 26 21:29:26 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* recog.c (const_double_operand): Fix typo.
+	* reload1.c (choose_reload_regs): Fix typo--swap #endif with }.
+
+	* loop.c (init_loop): Multiply copy_cost by 2.
+	(general_induction_var): Use rtx_cost directly.
+	(expr_benefit): Function deleted.
+
+	* m68k.md (andsi3): Generate bclr if appropriate.
+
+	* cccp.c (do_undef): Just a warning, if deleting something unusual.
+
+Sun May 26 18:51:33 1991  Jim Wilson  (wilson at sphagnum.cygnus.com)
+
+	* expr.c (force_operand): When calling recursively, use
+	a temporary to force evaluation of calls.  The C language
+	allows `f (g (x), g (y))' to be evaluated in different orders
+	on different hosts, which could lead to different code
+	generation for different hosts.
+
+	* recog.c (const_double_operand): New function for recognizing
+	CONST_DOUBLE rtx's.
+
+	* expmed.c (expand_mult_add): Add new parameter TARGET which is a
+	suggestion of where to store the result; pass it to expand_expr.
+	* loop.c (emit_iv_add_mult): Pass REG to expand_mult_add call as
+	target for the result.
+
+	* gmicro.md, old-sparc.md, pyr.md: Delete obsolete UMULT patterns.
+
+	* expmed.c (expand_mult): Convert DImode constants to a CONST_INT
+	if possible, so that multiplies by these can be optimized by the
+	existing code.
+
+Sun May 26 00:59:42 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* gcc.c (process_command): -save-temps is always valid.
+
+	* varasm.c (output_constructor): Don't crash if val == 0.
+
+	* cse.c (refers_to_mem_p): Handle constant addresses.
+
+	* cccp.c (main): Don't store thru last_include if null.
+
+Sat May 25 06:33:19 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* reload.c (find_reloads): Don't assume we have at least two operands
+	when we check for a simple copy.
+
+	* sched.c (update_reg_known_value): Deleted.
+	(init_alias_analysis): If have REG_EQUIV note, can always use NOTE's
+	value irrespective of number of sets.
+	Take known value from note, not SET_SRC.
+	(memrefs_conflict_p): Remove gotos.
+	ASHIFT can't occur in an address.
+	(true_dependence, anti_dependence, output_dependence): Take into
+	account the fact that a MEM_IN_STRUCT_P reference cannot conflict
+	with a non-MEM_IN_STRUCT_P reference at a fixed address.
+
+Fri May 24 11:34:39 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* Makefile.in (cplus-tab.c): Put back -d option.
+
+Fri May 24 06:46:07 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* rtl.c (rtx_alloc): Ensure we keep the obstack aligned.
+
+Fri May 24 00:17:13 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* reload1.c (choose_reload_regs): Try with inheritance, then without.
+	#if 0 the code to avoid inheritance in certain cases.
+
+Fri May 24 00:13:40 1991  James Van Artsdalen  (james at bigtex.cactus.org)
+
+	* out-i386.c (split_di): Check for CONST_DOUBLE before CONSTANT_P.
+
+	* tm-i386.h (LIMIT_RELOAD_CLASS): new macro.
+	(PREFERRED_RELOAD_CLASS): a CONST_DOUBLE can appear in narrower
+	classes than GENERAL_REGS.
+
+	* reload.c (push_reload): Limit reload class even if the SUBREG has
+	already been stripped.
+
+Thu May 23 11:08:21 1991  Jim Wilson  (wilson at sphagnum.cygnus.com)
+
+	* sched.c (schedule_insns): Don't schedule a block if the only insn is
+	a CODE_LABEL.
+
+Thu May 23 07:54:57 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* reload1.c (choose_reload_regs): Process reload in first pass if
+	a subsequent reload requires fewer registers.
+	Change criteria for processing from being a strict superset to 
+	having an intersecting, non-equal class.
+	Ignore optional and turned-off reloads in loop to see what is forced
+	to be allocated in first pass.
+
+	* toplev.c (compile_file): Fix typo in length of string to allocate
+	for sched2 dump's name.
+
+	* jump.c (find_cross_jump): Don't crash if single_set returns 0.
+
+	* recog.c (general_operand): A SUBREG of a constant is never valid.
+
+	* local-alloc.c (qty_compare, qty_compare_1): Make priority function
+	the same as in global-alloc: quantities with shorter lives are
+	allocated first.  This can speed up some code by a factor of three.
+
+Wed May 22 17:40:49 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* reload1.c (emit_reload_insns): Fix some minor bugs in making
+	REG_DEAD notes and recording insn that does store; code sometimes
+	assumed that each call to gen_move_insn produced at most one insn.
+
+Wed May 22 16:51:53 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* reload.c (push_reload): Support LIMIT_RELOAD_CLASS.
+
+Wed May 22 14:14:51 1991  Micheal Tiemann  (tiemann at wookumz.gnu.ai.mit.edu)
+
+	* jump.c (jump_optimize): Update the three simplifications that
+	start with the "if (...) x = 1;" case.  Add comments explaining how
+	to make them more machine independent, and comments explaining how
+	they might fail in the future.  Ifdef out the second case, and add
+	code explaining why it does not work.
+
+	* rtl.h: Put definition of FUNCTION_FLAGS_USES_CONST_POOL here.
+	* integrate.c: Remove definition of it here.
+
+	* integrate.h: New fields in struct inline_remap, min_insnno and
+	max_insnno, which indicate the range of insns covered by insn_map.
+	* integrate.c (expand_inline_function): Set min_insnno and max_insnno.
+
+Wed May 22 12:31:53 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* tm-vaxv.h (ASM_OUTPUT_LOCAL): Use data_section.
+
+	* protoize.c (fancy_abort): Define it.
+	* objc-parse.y (yyprint, set_yydebug): New functions.
+
+	* tree.h (gettags, get_permanent_types, get_temporary_types):
+	Declare them.
+
+	* Makefile.in (protoize.o, unprotoize.o):
+	Use the standard flags and include dirs.  Don't use -Wall.
+	* protoize.c (abort): Declaration deleted.
+
+	* cccp.c (main): Ensure `next' field in directory list is initialized.
+
+Wed May 22 09:27:49 1991  James Van Artsdalen  (james at bigtex.cactus.org)
+
+	* expmed.c (synth_mult): Return cost of -1 if shift is too
+	expensive.
+
+Wed May 22 07:53:52 1991  Michael Tiemann  (tiemann at cygint.cygnus.com)
+
+	* out-sparc.c (output_move_double): More SImode->Pmode fixes.
+
+Wed May 22 02:43:02 1991  Micheal Tiemann  (tiemann at wookumz.gnu.ai.mit.edu)
+
+	* Makefile.in, emit-rtl.c, explow.c, final.c, global-alloc.c,
+	gnulib2.c, hard-reg-set.h, regclass.c, reload1.c, cccp.c: Fix typos
+	and indentation.
+
+Wed May 22 00:14:37 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* combine.c (try_combine): Add to last change; handle subreg
+	in src as well as in dest of i3.
+
+Tue May 21 22:32:08 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* m68k.md (dbra): Rewrite pattern so it reflects simplifications that
+	combine will make.
+
+Tue May 21 10:44:05 1991  Jim Wilson  (wilson at sphagnum.cygnus.com)
+
+	* loop.c (strength_reduce): When a loop-vtop note is encountered,
+	reset `not_every_iteration'.
+
+Tue May 21 00:17:31 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* c-decl.c (init_decl_processing): Always use long type for size_t.
+
+	* varasm.c (assemble_variable): Use ASM_DECLARE_OBJECT_NAME.
+
+	* protoize.c: Include config.h.
+	(chmod, kill): Declarations deleted.
+	They aren't needed, and can conflict with system headers.
+	(wait): BSD declaration deleted.
+	(save_def_or_dec): Add missing fprintf arg.
+
+	* tm-next.h (EXTRA_FORMAT_FUNCTIONS): Fix typo.
+
+	* protoize.c: Use USG and VMS as most files do.
+	Don't expect BSD to be necessary defined outside this file.
+	Define getwd using getcwd, not vice-versa, to be like dbxout.c.
+	* cccp.c, SYSCALLS.c: Use USG and VMS as most files do.
+	Don't expect BSD to be necessary defined outside this file.
+
+Mon May 20 16:54:17 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* tm-i386.h, tm-att386.h, tm-bsd386.h, tm-sun386.h (ASM_BYTE_OP):
+	Renamed from ASM_BYTE.
+	* varasm.c (ASM_BYTE_OP): Likewise.
+
+	* c-decl.c, cplus-class.c (finish_struct): Typo:
+	Had PCC_BIT_FIELD_MATTERS which is now PCC_BITFIELD_TYPE_MATTERS.
+
+	* gcc.c (handle_braces): Don't deref input_suffix if null.
+
+Mon May 20 15:19:27 1991  Michael I Bushnell  (mib at geech.gnu.ai.mit.edu)
+
+	* cccp.c (pcfinclude): STRINGDEF struct is now longword aligned.
+
+Mon May 20 14:26:18 1991  Michael Tiemann  (tiemann at cygint.cygnus.com)
+
+	* sparc.md: Remove all arithmetic, logical, and shift patterns for
+	sub-SImode operands.  Also fix some DImode patterns.
+
+	* out-sparc.c (emit_move_sequence): Simplified considerably.
+
+	* rtl.c (rtx_alloc): Inline-code an optimized obstack_alloc.
+
+	* cplus-lex.c (make_{pointer,reference}_declaration): Call
+	`build_parse_node' instead of `build1' so memory can be freed.
+
+	* cplus-parse.y: Remove unneeded epsilon rules to produce an average
+	15% reduction in the number of reductions performed.
+
+	* cplus-parse.y (RETURN_INIT): Use new interface to speed up
+	grammar.
+	* cplus-decl.c (store_return_init): Use new interface.
+
+Mon May 20 11:16:34 1991  Jim Wilson  (wilson at sphagnum.cygnus.com)
+
+	* sched.c (schedule_block): A register which dies in a CALL_INSN
+	does not cross calls.  A single insn block must be scheduled, to
+	ensure that register lifetime info is corrected updated.
+
+Mon May 20 06:50:37 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* combine.c (try_combine): Don't combine when I1 and I2 both feed
+	into I3 and I1 uses the register set in I2.
+
+	* reload.c (find_reloads): Prefer pseudos over other things we may
+	reload.
+
+Mon May 20 02:02:15 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* combine.c (try_combine): Test MODES_TIEABLE_P when i3 src is subreg.
+
+	* m68k.md (trunc*): Don't set cc if use wider insn.
+
+Sun May 19 14:45:46 1991  Ron Guilmette  (rfg at ncd.com)
+
+	* Makefile.in (clean): Delete stage1...stage4.
+	(realclean): Delete cexp.output.
+
+	* fixincludes: Handle BSD43__IO* and BSD43_CTRL like IO* and CTRL.
+
+Sun May 19 15:00:05 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* reload1.c (count_possible_groups): New function.
+	(reload): Call it twice.  This checks for possible groups
+	after maybe spilling some single regs.
+
+	* configure (magnum, m3230): Aliases for mips/mips.
+
+	* fixincludes (machine/cpu.h):
+	Create in proper dir.  Fix mips/cpu.h too.
+
+	* reload.c (find_reloads): Turn off usage of reg_preferred_class.
+
+Sun May 19 09:51:24 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* flow.c (mark_used_regs): Continue putting REG_DEAD notes on 
+	fixed registers.
+
+	* regclass.c (reg_class_record): Don't count classes in which objects
+	won't fit.
+
+	* reload.c (find_reloads): Pre-compute preferred classes for each
+	operand; if operand 1 is copied to operand 0, merge the classes.
+	REJECT is now only 1/3 as costly as LOSERS; ? adds 3 to REJECT so
+	that it's semantics don't change.
+
+	* expr.c (compare_from_rtx): Do EQ and NE comparisons unsigned since
+	they are usually cheaper and will cse with comparisons against zero
+	which are already unsigned.
+
+	* reload1.c (choose_reload_regs): Don't try to access reload_out
+	for disabled reload (reload_strict_low may not have been cleared).
+
+	* reload1.c (choose_reload_regs): Don't let optional reloads inherit
+	spill regs until all non-optional reloads have been allocated spill
+	regs.
+	We can use find_equiv_reg even if must_reuse, we just can't get a
+	spill reg that way.
+
+	* expr.c (do_tablejump): When using LABEL_REF in arithmetic, make it
+	in Pmode instead of VOIDmode.
+
+	* function.c (fixup_var_refs_1): Don't try to make paradoxical
+	memory SUBREGs; instead keep SUBREG_REG a pseudo and copy between
+	memory and the pseudo.
+	(fixup_memory_subreg): Abort if we try making paradoxical SUBREGs.
+
+	* reorg.c (redundant_insn_p): Insns we pass may reference resources
+	set by INSN; it is sufficient that they not set resources in INSN.
+
+Sun May 19 08:06:17 1991  Michael Tiemann  (tiemann at cygint.cygnus.com)
+
+	* tm-sparc.h (STRUCT_VALUE): Change SImode to Pmode here, and in
+	other places.
+	(FIRST_PARM_OFFSET): Change 4 to UNITS_PER_WORD here, and in other
+	places.
+	(ROUND_ADVANCE): New macro to compute how far to advance the arg
+	pointer for a give parameter.
+	(FUNCTION_ARG): Use PARM_BOUNDARY instead of 32.
+	(EXTRA_CONSTRAINT): Don't depend on `reload_completed'.
+	* sparc.md (various places): Change many DImode predicates from
+	`general_operand' to `register_operand'.
+
+	* jump.c (find_cross_jump): Fixed 18 May change to use
+	`validate_change' to make sure we get valid, initialized values
+	regardless of which path we choose.
+
+Sat May 18 15:07:29 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* cccp.c: Rename FATAL_EXIT_CODE to FAILURE_EXIT_CODE.
+
+	* gnulib1.c: Rename SFVALUE to FLOAT_VALUE_TYPE.
+	(union flt_or_value): New type.
+	(*): Use that instead of flt_or_int in most places.
+	Delete some variables `intify' that aren't needed.
+	* tm-i386.h: Rename SFVALUE to FLOAT_VALUE_TYPE.
+
+	* stor-layout.c (layout_record): BITFIELD_NBYTES_LIMITED now 1 or 0.
+
+	* rtl.h (struct rtx_def): Drop SHORT_ENUM_BUG; keep ONLY_INT_FIELDS.
+
+	* loop.c (add_cost, copy_cost):
+	Variables replace old macros *_BENEFIT and COPY_PENALTY.
+	(init_loop): New function to set the variables.
+	(expr_benefit): Use rtx_cost.
+	* toplev.c (compile_file): Call init_loop.
+	* cse.c (rtx_cost): Treat mult by 2**n as a shift by default.
+
+	* toplev.c (output_file_directive):
+	Typo in ASM_OUTPUT_MAIN_SOURCE_FILENAME.
+
+	* gnulib2.c [L_trampoline]: Rename function to __trampoline.
+	Always compile it even if empty.  Make it global.
+
+Sat May 18 14:11:37 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* reload.c (find_reloads): Remove unnecessary test when increasing
+	cost of alternative due to non-preferred register class.
+
+	* reload1.c (choose_reload_regs): Fix typo.
+
+	* tm-rs6000.h: Add hard registers for the 8 CR fields; add classes
+	CR0_REGS and CR_REGS.
+	Don't use CC0; add CCUNSmode and CCFPmode.
+	(FIXED_REGISTERS): r31 (fp) is no longer fixed.
+	(REG_CLASS_FROM_LETTER): Remove 'd' for GENERAL_REGS; 'r' already
+	means this.
+	(CONST_DOUBLE_OK_FOR_LETTER): If we can move a constant in two insns
+	for DF or one insn for SF, let it match 'G'.
+	(SECONDARY_RELOAD_CLASS): Define this new macro.
+	(FUNCTION_ARG): Fix typo in testing nargs_prototype.
+	(LEGITIMATE_CONSTANT_P): Always return 1.
+	(FIXUNS_TRUNC_LIKE_FIX_TRUNC): Do not define.
+	* rs6000.md: Don't use CC0; instead use a pseudo which will be assigned
+	to CR_REGS or CR0_REGS.  Make variants of arithmetic insns that
+	set only the condition code and that set both the condition code
+	and a normal result.
+	Delete "cc" attribute and add "type" attribute.
+	Define delays for cc-setting insns and for loads.
+	Replace `d' constraint with `r'.
+	Delete patterns for HImode and QImode arithmetic operations.
+	Handle putting "easy" DFmode or SFmode constant into a register.
+	Rework compare and branches; add scc insns.
+	Fix up decrement-and-branch insns, but they still won't be used yet.
+	(call insns): Use pseudo for "lr" in indirect calls.
+	(movdf, movsf): Explictly handle need to use memory to copy between
+	general and FP registers.
+	* out-rs6000.c (next_insn_tests_no_unsigned, unsigned_comparisons_p):
+	Deleted.
+	(update_cc): Likewise.
+	(gen_reg_operand): Tighen up a bit.
+	(cc_reg_operand, reg_or_u_short_operand, easy_fp_constant): New fns.
+	(fp_reg_or_mem_operand, mem_or_easy_const_operand): Likewise.
+	(call_operand): Accept pseudo register.
+	(branch_comparison_operator, scc_comparison_operator): New functions.
+	(secondary_reload_class, ccr_bit, must_save_cr): Likewise.
+	(print_operand, case 'w', 'u'): Support CONST_DOUBLE.
+	(print_operand, cases 'W', 'f', 'F', 'R', 't', 'T', 'C', 'D'):
+	New cases.
+	(print_operand, cases 'j' and 'J'): Now use for bit number in CCR.
+	(output_{pro,epi}logue): If we call function to save/restore fpr's,
+	we need to save/restore LR.
+	Save CR if we modify the call-saved fields.
+
+	* romp.md: Delete HImode and QImode arithmetic operations.
+	(swapxi): Delete; obsolete and never used.
+
+	* tm-a29k.h (TARGET_SWITCHES): Change -mnodw to -mndw.
+	Add -m{no-,}reuse-arg-regs.
+	(SECONDARY_RELOAD_CLASS): Provide a definition for this new macro.
+	* a29k.md: Delete all HImode and QImode arithmetic operations.
+	* out-a29k.c (secondary_reload_class): New function.
+	(incoming_reg): Look at TARGET_NO_REUSE_ARGS.
+
+	* reload1.c (eliminate_regs): Don't remove a PLUS unless inside	an
+	address since it would need to change INSN_CODE and can't do it here.
+
+	* reorg.c (uid_to_ruid, max_uid): New vars.
+	(mostly_true_jump): Refine prediction slightly.
+	Use uid_to_ruid map to accurately see if branches are backward.
+	(relax_delay_slots): Pass condition to mostly_true_jump.
+	(dbr_schedule): Allocate and build uid_to_ruid map.
+
+Sat May 18 12:54:45 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* cse.c (insert): "Unchanging" pseudos count as constant.
+
+	* tree.c (make_node): Rewrite end as a switch.
+
+Sat May 18 03:51:06 1991  Michael Tiemann  (tiemann at cygint.cygnus.com)
+
+	* cse.c (FIXED_BASE_PLUS_P): Since this is used when called from
+	`expand_inline_function', also catch the case where the base
+	register is VIRTUAL_STACK_VARS_RTX.
+	(simplify_binary_operation): In EQ and NE case, convert a COMPARE
+	operand to something we can optimize.
+	(refers_to_mem_p): Handle the case when `base' is a LO_SUM.
+	* integrate.c (FIXED_BASE_PLUS_P): Define this to recognize offsets
+	from the various virtual registers.
+	(expand_inline_function): Expand exprs using EXPAND_SUM so as to get
+	stack frame addresses instead of pseudos.  This yields much better
+	cse (at little cost) for GNU C++.  Also, test FIXED_BASE_PLUS_P as
+	an alternative to CONSTANT_P to record a known register value.
+	* jump.c (find_cross_jump): If we are processing a cross jump and
+	the insns fail to match, try looking for a REG_EQUAL note that makes
+	them equivalent insns.  If found, keep going.  This is important for
+	merging cleanup codes when one cleanup path gets frame address in a
+	register when the other path gets the frame address explicitly.
+
+	* cplus-init.c (build_delete): Fixed residual use of 1-based
+	indexing to use 0-based indexing instead.
+
+	* cplus-decl2.c (grokclassfn): Fix raeburn's May 12 change so that
+	destructors still have the same name.
+
+	* cplus-decl.c (decls_match): Remove dependence on MERGED.
+
+	* cplus-class.c (build_vbase_path): Fixed bug in computing offsets
+	for exprs which are FIXED_TYPE_P.
+	(build_vfn_ref): Change initializer for REF from 0 to NULL_TREE.
+
+	* cplus-decl.c (maybe_build_cleanup): Add LOOKUP_NONVIRTUAL to flags
+	argument in call to `build_delete' if DECL does not use virtual
+	baseclasses.  If it does, we go through a function call to save
+	space, unless FLAG_EXPENSIVEO_OPTIMIZATIONS is nonzero.  ??Better
+	approach is to know, in expand_cleanups, to clear `flag_no_inline'
+	during the cleanup's expansion.
+
+	* cplus-*.c (various places): Add LOOKUP_DESTRUCTOR to all places
+	where we know we are calling a destructor for a non-null object.
+
+	* stmt.c (fixup_gotos): Run destructors on cleanups that come
+	from the block being exited, in addition to any inner blocks
+	for which LABEL is now defined.
+	(expand_return): Take care of destructors that occur in the
+	current binding level.
+	(fixup_cleanups): If we emitted no insns, don't change *BEFORE_JUMP.
+
+	* rtlanal.c: Define `target_flags' here...
+	* toplev.c: ...not here.  This enables us to link gen* programs
+	which might, through rtlanal.o, pull in references to `target_flags'
+	that are never used.
+
+	* function.c: Add declaration for `current_function_uses_const_pool'.
+	* expr.h: Add extern declaration for that variable.
+	* function.h (struct function): Add a slot named
+	`uses_const_pool' for `current_function_uses_const_pool'.
+	* function.c ({push,pop}_function_context): save and restore the
+	value of `current_function_uses_const_pool'.
+	* rtl.h (FUNCTION_FLAGS_USES_CONST_POOL): Defined to be 0200.
+	* integrate.c (initialize_for_inline):
+	FUNCTION_FLAGS_USES_CONST_POOL now contributes to the value of
+	`function_flags'.
+	(output_inline_function): Restore `current_function_uses_const_pool'
+	from `function_flags'.
+	(save_for_inline_copying): Only call `save_constants' if
+	`current_function_uses_const_pool' is nonzero.
+	(save_for_inline_nocopy): Ditto.
+	(save_constants): Tweaked to perform its treewalk faster.  Notably,
+	it no longer accepts ptrs to NULL rtl.  All callers changed.
+	* varasm.c (force_const_mem): Set `current_function_uses_const_pool'
+	if we create a constant pool reference.
+
+	* cplus-parse.y, c-parse.y: Add new function `set_yydebug'.  If
+	YYDEBUG is defined, sets `yydebug' to VALUE.  Otherwise, prints
+	warning that operation is invalid.
+	* toplev.c (main): Call `set_yydebug' instead of setting `yydebug'
+	directly.  This allows user to turn YYDEBUG off for faster parsing.
+
+	* cse.c (simplify_binary_operation): Eliminate abort when passed
+	DImode operands.
+
+Fri May 17 21:56:41 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* hard-reg-set.h (reg_class_superunion): New var.
+	* regclass.c (init_reg_sets): Compute reg_class_superunion.
+	(reg_classes_intersect_p): New function.
+
+	* reload.c (find_reloads): Alternative is discouraged if it puts
+	a pseudo in a register class it doesn't prefer.
+
+	* reload1.c (basic_block_needs): Now an array, per register class.
+	(reload): Compute separate basic_block_needs for each class.
+	(spill_hard_reg): If pseudo is only in one block, see if that block
+	needs a spill register of a class containing the hard reg; leave the
+	pseudo alone if not.
+
+	* reload1.c (reload_mode, reload_nregs): New vars.
+	(reload_reg_class_lower): Use them.
+	(allocate_reload_reg): New function.
+	(choose_reload_regs): Track size and class of any groups.  We
+	can inherit reloads if we are the size of the largest group or
+	if our class is disjoint from those needed for groups.
+	Try all inherits first before all spill register allocations
+	unless there is a later reload with a smaller class; call
+	allocate_reload_reg to do the actual allocation.
+	Use new vars above.
+	(emit_reload_insns): Delete output reload even if we weren't
+	storing to memory.
+
+	* reload.h (reload_secondary_reload, reload_secondary_p): New vars.
+	* reload.c (push_reload): If secondary reload register is needed,
+	make a secondary reload.
+	* reload1.c (reload): Reload with reload_secondary_p nonzero is in use.
+	(choose_reload_regs): Likewise.
+	(emit_reload_insns): Handle secondary reloads, when needed.
+
+	* reload1.c (reload): Add pass to remove death notes for things that
+	are no longer registers or don't die if we must preserve death notes.
+	(emit_reload_insns): Refine REG_DEAD notes to be more accurate; make
+	notes for secondary reloads.
+
+	* reload1.c (emit_reload_insns): Abort for output reloads for jumps;
+	we have to implement this at some point.
+
+Fri May 17 20:08:22 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* protoize.c: Handle ultrix like BSD.
+
+Fri May 17 15:56:41 1991  Richard Stallman  (rms at geech.gnu.ai.mit.edu)
+
+	* Pass library function name to INIT_CUMULATIVE_ARGS.
+	* calls.c (expand_call): Pass extra arg to INIT_CUMULATIVE_ARGS.
+	* expr.c (emit_library_call): Likewise.
+	* function.c (assign_parms): Likewise.
+	* tm-*.h (INIT_CUMULATIVE_ARGS): Accept the extra arg.
+	(INIT_CUMULATIVE_INCOMING_ARGS): Likewise, just for symmetry.
+
+Fri May 17 15:41:22 1991  James Van Artsdalen  (james at bigtex.cactus.org)
+
+	* tm-i386v4.h (ASM_OUTPUT_COMMON): Don't attempt alignment on a
+	three byte boundary.
+
+Fri May 17 15:25:16 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* function.c (assign_stack_local, assign_outer_stack_local): Make
+	the alignment in bytes.
+
+Fri May 17 14:31:00 1991  Michael Tiemann  (tiemann at cygint.cygnus.com)
+
+	* cplus-class.c (build_vbase_path): Only build a COND_EXPR if
+	NONNULL is zero.
+	(resolves_to_fixed_type_p): Check TREE_HAS_CONSTRUCTOR for
+	CALL_EXPRs and INDIRECT_REFs.
+
+	* cplus-call.c (build_method_call): Add call to `constructor_name'
+	if BASETYPE changes.
+	* cplus-init.c (build_new): Add LOOKUP_NONVIRTUAL to FLAGS argument
+	to `build_method_call'.  Constructors are never virtual.  Also, set
+	TREE_HAS_CONSTRUCTOR bit for return value from `build_method_call'.
+
+Thu May 16 21:36:10 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* rtl.h (CONSTANT_P): Now true for a CONST_DOUBLE.
+	* combine.c, cse.c, emit-rtl.c, expr.c, integrate.c, loop.c:
+	Update for new meaning of CONSTANT_P to include CONST_DOUBLE.
+	* optabs.c, recog.c, reload.c, reload1.c, rtl.h, rtlanal.c:
+	Likewise.
+	* romp.md, rs6000.md, out-alliant.c, out-convex.c: Likewise.
+	* out-gmicro.c, out-i386.c, out-i860.c, out-m68k.c: Likewise.
+	* out-sparc.c, out-spur.c, out-tahoe.c: Likewise.
+
+	* combine.c (SUBST, SUBST_INT): If INTO equals NEWVAL, don't
+	record the substitution.
+	(try_combine, subst, make_compound_operation, simplify_and_const_int):
+	No longer need check for changes before using SUBST macro.
+	(simplify_shift_count): Likewise.
+
+	* integrate.c (copy_rtx_and_substitute, case CONST): If what
+	was originally a constant becomes something that is not a constant
+	when passed through a recursive call, return it without the CONST.
+
+	* rtl.c (copy_most_rtx): New function.
+	* rtl.h (copy_most_rtx): Declare it.
+	* function.c (fixup_var_refs_1, case MEM): If a MEM contains VAR,
+	ensure the MEM isn't shared by copying it.
+
+	* expmed.c (expand_divmod): If doing MOD, produce divide result
+	into unique pseudo so that we might CSE the division.
+
+Thu May 16 12:01:42 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* reload.c (push_reload): Try find_dummy_reload before dead regs.
+
+	* function.c (assign_stack_local*): Use GET_MODE_ALIGNMENT.
+	Use CEIL_ROUND consistently.
+	Don't force word alignment even if STRICT_ALIGNMENT (experiment).
+
+Thu May 16 10:31:04 1991  Jim Wilson  (wilson at sphagnum.cygnus.com)
+
+	* unroll.c (unroll_loop): Don't abort if start label does not
+	immediately follow LOOP_BEG note.  This can happen as a result of
+	jump threading.
+	* reorg.c (mostly_true_jump): Eliminate repeated test in second loop.
+
+	* sched.c (priority): Abort if find a NOTE in a groups of insns that
+	must be scheduled together.
+	(free_pending_lists): New function.  Moves every *_LIST rtx on the
+	pending lists to the free list.
+	(add_insn_mem_dependence): Get a *_LIST from the free list instead
+	of creating one if possible.
+	(sched_analyze_1): Don't move an insn across a call if it uses a
+	register that is not already live across calls. 
+	(sched_analyze_insn): Likewise.
+	(sched_analyze_1): When flusing the pending lists, put the *_LIST
+	rtx on the free list.
+	(sched_analyze): Likewise.
+	(schedule_block): Likewise.
+	(sched_analyze_2): For a cc0 setter/user pair, put a copy of all
+	dependencies on the first insn onto the second insn.
+	(sched_analyze_insn): Likewise for call sequences.
+	(sched_analyze_insn): Handle REG_INC notes just like SETs.
+	(sched_note_set): Handle hard registers same as psuedo regs.
+	(attach_deaths): Likewise.  Don't add REG_DEAD notes to the frame
+	pointer, arg pointer or stack pointer.
+	(schedule_block): Likewise.
+	(rank_for_schedule): Do not check whether each insn of a sequence
+	that must be scheduled together is ready.  They will only reach here
+	if they are all already ready.
+	(schedule_block): After reload, don't need to give special treatment
+	to insns at function start which set up the function parameters.
+	Don't treat tail specially if it is part of a group that must be
+	scheduled together.
+	When a group of instructions is scheduled together, run the lifetime
+	analysis code on every instruction in the group from last to first.
+	A call_insn kills all call_used and global regs except those
+	explicitly used by the call_insn.
+	(schedule_insn): Initialize new variables.  If USE_C_ALLOCA, free
+	alloced memory immediately after each schedule_block call, not once
+	at the end.
+
+	* rtl.c (add_dependence): When adding a dependence that points to an
+	insn that is part of a sequence that must be scheduled together,
+	make the dependence point to the last insn of the sequence instead.
+
+Wed May 15 13:08:32 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* combine.c (simplify_and_const_int): If we have
+	(and (OP (lshiftrt X Y) Z) C), for OP of IOR, XOR, and NOT, commute
+	OP and LSHIFTRT to put AND and LSHIFTRT adjacent to try to form
+	ZERO_EXTRACT.
+
+	* combine.c (subst, gen_lowpart_for_combine, get_last_value_validate):
+	Use object's mode instead of VOIDmode when we make
+	(clobber (const_int 0)) in case someone uses the mode for significant
+	bits.
+	* rtlanal.c (side_effects_p): Reject non-VOIDmode CLOBBERs.
+
+	* rtlanal.c (reg_set_p_1): Remove test for `reg_set_reg' being MEM.
+	(reg_set_p): Abort if passed a MEM.
+
+	* toplev.c (strip_off_ending): Strip trailing ".f".
+
+Wed May 15 12:54:18 1991  Michael Tiemann  (tiemann at cygint.cygnus.com)
+
+	* cplus-typeck.c (build_modify_expr_1): If the TREE_TYPE of the
+	recursive result is an ARRAY_TYPE, change it to void_type_node so
+	build_compound_expr doesn't lose when calling default_conversion.
+
+	* cplus-tree.h (lang_type): Remove AS_LIST field from lang_type.
+	Use TYPE_MAX_VALUE field of type instead.
+	(TREE_REFERENCE_EXPR): New macro.
+
+	* cplus-parse.y (LC): If we are not in temporary allocation, call
+	permanent_allocation.  This frees up any PARM_DECL nodes that were
+	allocated since we processed an inline function.  NOTE: we still
+	have to clean up these parms from inline functions that did not go
+	inline.
+
+	* cplus-decl.c (store_parm_decls): Since we no longer push an extra
+	binding level if ! PARMS_HAVE_CLEANUPS, test CLEANUP_LABEL to figure
+	out how far up the binding countours we must look.
+	(init_decl_processing): If FLAG_NO_INLINE is nonzero, set
+	FLAG_DEFAULT_INLINE to zero.
+
+	* cplus-class.c (finish_struct_bits): Copy TYPE_MIN_VALUE and
+	TYPE_MAX_VALUE.  These actually hold C++-related data that's moved
+	up from the lang_type data structure.
+
+	* cplus-*.c: Change REFERENCE_EXPR to CONVERT_EXPR.  Set
+	TREE_REFERENCE_EXPR bit to indicate a CONVERT_EXPR that's really the
+	address of a C++ reference expression.
+
+Wed May 15 12:30:26 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* tm-sparc.h (FIXED_REGISTERS): Register 0 is not fixed; it is used
+	for the condition code, not to represent the fixed %g0.
+
+Tue May 14 18:59:06 1991  Jim Wilson  (wilson at sphagnum.cygnus.com)
+
+	* explow.c (find_next_ref): Start search at first insn after INSN.
+
+	* jump.c (jump_optimize): Update the three simplications that start
+	with the "if (...) x = 1; else {...} if (x) ..." case, so that when
+	HAVE_cc0 is not defined, they do not accept TST insns (which could
+	just be a register to register move).  They should only accept insns
+	with the COMPARE operator.
+
+Tue May 14 14:51:33 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* cse.c (simplify_binary_operation): Don't abort when comparing
+	two CONST_DOUBLE values.
+
+Tue May 14 11:35:47 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* c-common.c (decl_attributes): Fix typo in name of attribute.
+	It should be `aligned'.  Also don't crash on unknown attribute.
+
+	* expmed.c (init_expmed): Make a separate object to free back to.
+
+	* hard-reg-set.h (HOST_BITS_PER_LONG_LONG): Provide default definition.
+
+	* toplev.c (main): Implement -gdwarf.
+
+Tue May 14 06:32:48 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* flow.c (mark_used_regs): Don't make REG_DEAD notes for fixed regs.
+
+	* combine.c (subst): Convert (not (ashift C X)) to (or (rotate ..))
+	and similarly for (not (lshiftrt C X)).
+	(make_field_assignment): Make corresponding change in how we recognize
+	bitfield assignment of single bit to zero.
+
+	* combine.c (merge_outer_ops): New function.
+	(simplify_shift_const): Use merge_outer_ops to generalize and
+	simplify handling of outer_ops.
+	Try using distributive law followed by invert distributive law
+	to simplify combinations of logical operations and shifts.
+
+	* emit-rtl.c (gen_highpart): Correct conditional that says when we
+	can get the bits of a DFmode object; copy from gen_lowpart.
+
+	* cse.c (simplify_binary_operation, case MULT): Simplify zero case.
+	(simplify_binary_operation, case DIV): In 0/x, return zero in proper
+	mode.
+
+	* combine.c (simplify_comparison): Can only extend comparison
+	to wider mode if equality comparison or test of sign bit.
+
+Tue May 14 03:26:36 1991  Michael Tiemann  (tiemann at cygint.cygnus.com)
+
+	* cplus-tree.h (lang_type): Change to use TREE_VEC to hold basetype
+	info.
+	(CLASSTYPE_N_BASECLASSES, CLASSTYPE_BASECLASS): Changed accordingly.
+	Baseclasses are now counted [0..n) instead of [1..n].
+	(CLASSTYPE_BASETYPECLASSES): Deleted.
+	* cplus-*.c (various places): Change code to work with new
+	representation for basetypes.
+
+	* toplev.c (main): Handle `-gdwarf' as a debug option.
+
+	* cse.c (insert): Treat pseudos marked RTX_UNCHANGING_P as being
+	const.
+
+Mon May 13 22:44:18 1991  Jim Wilson  (wilson at ok.cygnus.com)
+
+	* mips.md: In the div/mod peepholes, don't apply the peephole if the
+	first operation overwrites one of its two operands.
+
+Mon May 13 12:14:51 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* expmed.c (store_bit_field, extract_bit_field):
+	Set volatile_p while checking predicates.
+	* recog.h (volatile_p): Declare it.
+	* explow.c (force_not_mem): Do nothing with BLKmode.
+
+	* SYSCALLS.c (u_int): Don't define on DGUX--already defined.
+
+	* m68k.md (zero_extend*): Don't make the subreg in the template.
+	Make it explicitly, and handle subregs as operand 0.
+
+	* tm-convex.h (MODES_TIEABLE_P): Fix typos.
+
+	* loop.c (check_dbra_loop): To check for a loop with a `break', use
+	loop_number_exit_label, not the uid_luid of each label, since loop
+	unrolling may have created new labels with no uid_luid.
+
+	* expr.c (push_block): Fixed typo in last change.
+
+Mon May 13 12:07:25 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* combine.c (subst): If we can't change comparison code, see if
+	we can instead surround our operation with an XOR.
+
+	* combine.c (make_compound_operation, simplify_and_const_int):
+	Ensure shift counts are non-negative and in range before using them
+	to perform shifts.
+	(simplify_comparison): Likewise.
+
+	* combine.c (try_combine): See if we have previously merged a
+	compare and arithmetic operation.  If so try to take it apart to
+	allow further combines (such as making a branch-and-decrement).
+
+	* combine.c (try_combine): Don't make VOIDmode register if our split
+	point is a constant.
+
+	* combine.c (subst): Use COMBINE_RTX_EQUAL_P to see if SET_DEST
+	is our register; two hard regs might have different rtx.
+
+	* combine.c (subst): Generalize associative law handling to
+	cases not involving constants.
+
+	* combine.c (expand_compound_operation): If we would return a
+	(clobber (const_int 0)), return what we were given.
+
+	* combine.c (simplify_shift_const): Clean up by removing fallthrough.
+
+Mon May 13 10:26:00 1991  James Van Artsdalen  (james at bigtex.cactus.org)
+
+	* i386.md (all calls to output_move_double): call return
+	value to avoid spurious compiler warnings.
+	Allow REG in all alternatives of operand 0 where possible.
+	Remove patterns to recognize increment/decrement.
+	(addsi3, addhi3, addqi3): Do this in here instead.
+	(floatdidf2): New pattern.
+	(adddi3, subdi3, negdi2): New patterns.
+	(umulsi3, umulhi3): Remove obsolete UMULT patterns.
+	(divM3, udivM3, divmodM4, udivmodM4): Use "r" constraint instead
+	of "x" or "abc".
+	(sqrtsf2, sqrtdf2): New patterns.
+	(ashldi3, ashrdi3, lshldi3, lshrdi3): New patterns
+	(All shift and rotate patterns): Don't use reg name explicitly in
+	output string: use %N operand reference.
+	(ashlM3, lshlM3): Use `add' instead of `shl'/`sal' if possible.
+	(insv): Fix output constraint.  Clarify source.  Disable for now -
+	makes worse code.
+	(SImode bit test, all Scond patterns): Allow MEM operands too.
+	(seq, sne): Handle CC_Z_IN_NOT_C.
+	(jump, indirect_jump, tablejump): Align code on word boundary
+	after unconditional jumps.
+	(`loop' patterns): Delete - will never be useful on i386.
+	(call_pop, call_value_pop): New patterns.
+	(return): New pattern: Do `return' if simple epilogue.  But only if
+	the real function epilogue isn't next.
+	(movstrsi): Do word moves, not just bytes, if count is unknown.
+	(ffsM2): New patterns.
+
+	* out-i386.c (FP_TOP, AT_SP, RET, RETCOM, POP_ONE_FP,
+	FP_CALL1, FP_CALL): Move to tm-i386.h for use by i386.md.
+	(output_movf, fp_call_internal, output_fix_trunc, split_di):
+	No longer static - called from i386.md.
+	(via_memory): Finish return value change.
+	(output_move_const_double): Delete unused function.
+	(simple_386_epilogue): New predicate.
+	(function_prologue): Allocate frame regardless of whether or not
+	there is a frame pointer.
+	Use output_asm_insn instead of fprintf to push registers.
+	(function_epilogue): Likewise.
+	If there is a frame pointer, don't necessarily fix %esp just to
+	pop a reg - use offset from frame pointer.
+	Fix -fomit-frame-pointer support.
+	Fix RETURN_POPS_ARGS case where args > 32K bytes.
+	(print_operand): A LABEL_REF gets an OFFSET_PREFIX too.
+	(print_operand_address): %esp can only be base reg, never index.
+	(split_di): New function.
+
+	* tm-i386.h: Remove references to obsolete tm-compaq.h file.
+	(TARGET_486): New flag.
+	(TARGET_SWITCHES): New options -m486, -mno486, -m386.
+	(SMALL_REGISTER_CLASSES): New macro.
+	(ASM_OUTPUT_LOOP_ALIGN): New macro.
+	(all reg macros, ARG_POINTER_REGNUM): Create argument pointer,
+	to be eliminated in favor of %esp or %ebp.
+	(HARD_REGNO_NREGS, REGNO_REG_CLASS): Use FP_REGNO_P.
+	(REGISTER_MOVE_COSTS): It is expensive to move between integer and
+	float registers.
+	(FP_REGNO_P): Detect only the FP regs.
+	(all class macros): Delete obsolete classes ABC_REGS & ABCI_REGS.
+	(REG_CLASS_FROM_LETTER): Add `S' for SIREG, remove `x' for ABCI_REGS.
+	(CONST_OK_FOR_LETTER_P): Add `J' for DImode shifts.
+	(FIRST_PARM_OFFSET): Offset now zero.
+	(ELIMINABLE_REGS, CAN_ELIMINATE, INITIAL_ELIMINATION_OFFSET):
+	Use generalized scheme to eliminate frame and arg pointers.
+	(INITIAL_FRAME_POINTER_OFFSET): Delete.
+	(REG_OK_FOR_BASE_P): allow virtual arg pointer.
+	(FP_TOP, AT_SP, RET, RETCOM, POP_ONE_FP, FP_CALL1, FP_CALL):
+	Moved here from out-i386.c for use by i386.md.
+
+	* tm-compaq.h: Delete obsolete file.
+
+Sun May 12 18:38:41 1991  Ken Raeburn  (raeburn at watch.com)
+
+	* cplus-decl.c (print_binding_level, print_binding_stack,
+	print_other_binding_stack): New debugging routines; dump one or
+	more binding levels to stderr.
+
+	* cplus-decl.c (push_to_top_level): New routine; saves copies of
+	all class and local bindings, and some other state, and clears the
+	real values, to effectively move to global scope.
+	(pop_from_top_level): Restore the saved state.
+
+	* cplus-decl.c (adjust_type_value): No longer static.  Abort if
+	current_binding_level is class binding level; need to investigate
+	that situation further.
+
+	* cplus-decl.c (finish_function): Check that the binding level being
+	popped really is a function-parameter binding level.
+
+	* cplus-tree.h (DESTRUCTOR_DECL_PREFIX): Replaces
+	DESTRUCTOR_DECL_FORMAT; used as a prefix before the class name.
+	* cplus-decl2.c (grokclassfn): Use it, and call build_overload_name
+	rather than just copying the class name.
+
+	* cplus-method.c (fndecl_as_string): Use TREE_TYPE rather than
+	indirecting through type name and the identifier's associated type,
+	since the latter may have changed.
+	(build_nested_name): New argument, text_end; callers changed.  Call
+	build_overload_identifier rather than copying class name.
+	(build_overload_value): Strip non-lvalue nodes for all arguments.
+	Fixed up the handling of negative DImode values.
+	(build_overload_identifier): New function.  Copy class name (with
+	length) if non-template, or build a name from template parameters.
+	(build_overload_name): Call build_overload_identifier for class
+	names.
+
+	* cplus-parse.y: Added comment about use of $$ for $1.
+	(template_type_name): Removed useless precedence specificiation.
+	(template_arg_list): Wrap TREE_LIST nodes around all arguments in
+	the list.
+	(template_arg): Call groktypename on type names.  For expressions,
+	specify "UNARY" precedence.
+	(PRE_PARSED_CLASS_DECL handling): Put a copy of the new class decl
+	into global scope, to avoid recursive expansion, since we start in a
+	non-global scope set up for the parameters.
+
+	* cplus-pt.c (coerce_template_parms): New function.  Converts
+	template arguments to appropriate types, returns a vector containing
+	results.
+	(mangle_class_name_for_template): Removed nparms argument.
+	Changed to deal with arglist as vector.  No longer call
+	groktypename.  Some initial code added for PARM_DECL (non-type)
+	parameters; work not completed.
+	(lookup_template_class): Call coerce_template_parms.  Removed some
+	unused code.
+	(push_template_decls, pop_template_decls): Fixed to deal with
+	arglist as vector.  More code for non-type parameters.
+	(instantiate_template): Push to top binding level before pushing any
+	declarations.
+	(end_template_instantiation): Pop from top level, then push the new
+	decl at top level.
+
+	* cplus-tree.h (struct lang_identifier): Renamed field "template" to
+	"class_template_info"; accessor macros changed.
+
+	* cplus-pt.c (struct template_info): Renamed from "template".
+	Removed unused fields.
+
+Sun May 12 17:38:46 1991  Jim Wilson  (wilson at cygnus.com)
+
+	* unroll.c (copy_loop_body): Fix typo: had `==' for `='.
+
+Sun May 12 17:05:07 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* genattrtab.c (gen_attr): Clear has_asm_insn field in new object.
+
+Sun May 12 04:21:52 1991  Michael Tiemann  (tiemann at cygint.cygnus.com)
+
+	* hard-reg-set.h (HARD_CONST): New macro.  Converts integer
+	constants to appropriate type for use with HARD_REG_SET.
+	({SET,CLEAR,TEST}_HARD_REG_BIT): Use this macro where appropriate.
+	(GO_IF_HARD_REG_SUBSET): Ditto.
+	(HARD_REG_SET): Add new case if FIRST_PSEUDO_REGISTER <=
+	HOST_BITS_PER_LONGLONG.
+	* global-alloc.c: Pass HARD_CONST (0) instead of 0 to functions
+	which are looking for a HARD_REG_SET argument.
+	* reorg.c (resource_conflicts_p): Change comparison of HARD_REG_SET
+	value to compare against HARD_CONST.
+
+	* all xm-*.h files: Added HOST_BITS_PER_LONGLONG where
+	HOST_BITS_PER_LONG was defined.
+	* tm-sparc.h (REG_CLASS_CONTENTS): Fixed in case we're using long
+	long HARD_REG_SETs.
+
+	* toplev.c (main): support -gdwarf switch.
+
+	* longlong.h (umulsidi3): SPARC .umul routine returns the value in
+	WORD_LITTLE_ENDIAN form, so swap.  Other word-endian changes for
+	inline mul routines.
+
+	* gnulib2.c (__divdi3): If C is nonzero, negate whole division
+	instead of returning negation of quotient.
+
+Sat May 11 20:06:08 1991  Torbjorn Granlund  (tege at krishna.sics.se)
+
+	* expmed.c (outside of functions): New vars: lea_cost, lea_max_mul.
+	(init_expmed): Initialize lea_cost and lea_max_mul. 
+	(synth_mult): Use them.
+
+Sat May 11 20:11:41 1991  Michael Tiemann  (tiemann at cygint.cygnus.com)
+
+	* cplus-class.c (build_vbase_path): Rewritten and simplified.
+	* cplus-cvt.c (build_up_reference): Try to get away without building
+	a NOP_EXPR around the return value of `build_component_addr'.
+	Ditto for return value from `convert_pointer_to'.
+
+	* cplus-decl.c (void_zero_node): New node.  Used in conditional
+	expressions where one arm must do nothing.
+	* various places: replace calls that built this node dynamically to
+	just use the global copy.
+	* cplus-tree.h (void_zero_node): Declare it globally.
+
+	(maybe_build_cleanup): Don't call `convert_force' on the return
+	value of `build_unary_op'.  We should have license to modify its
+	type without harm.
+	* cplus-gc.c (protect_value_from_gc): Same idea for VAR_DECL and
+	PARM_DECL nodes.
+
+	* toplev.c (f_options): Add choice for -fPIC.
+
+	* varasm.c (assemble_function): If it's a function name that's the
+	first global name, strip of a leading '*' if there is one.
+
+	* reload.c (find_reloads): Fix comment.
+
+	* stmt.c (expand_return): Call `any_pending_cleanups' with argument.
+
+	* expr.c (expand_expr): In TARGET_EXPR case, If TARGET is null and
+	DECL already has rtl, use that as the target.
+	(expand_expr): In BIND_EXPR try using expand_{start,end}_bindings to
+	catch cleanups...otherwise fixup_cleanups must be modified to deal
+	with cleanups not in any contours.
+
+Sat May 11 15:09:42 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* out-i386.c (via_memory): Return a memref to the stack.
+	(fp_call_internal): Change call to via_memory.
+
+	* expr.c (push_block): New arg BELOW specifies padding direction.
+	All callers changed.
+	(emit_push_insn): Pass an interesting value for BELOW.
+
+	* c-parse.y (typespec): Pass the TYPE_DECL for a typedef name.
+	* c-decl.c (grokdeclarator): Handle TYPE_DECL in declspecs.
+
+Thu May  9 15:17:44 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* m88k.md (zero_extend pattern): Compute correct constant.
+
+Thu May  9 07:44:20 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* combine.c (subst): Remove WAS_REPLACED; always check the rtl
+	for specific cases of interest and don't use TO and FROM when
+	looking into the rtl.
+
+	* combine.c (subst, case MEM): Call make_compound_operation here
+	so any ASHIFTs will be MULTs for mode_dependant_address_p calls later.
+	(subst, case PLUS): Remove cases already done elsewhere.
+
+	* expmed.c (emit_store_flag): Don't let the delete_insns_since call
+	we do kill insns to do an auto-inc.
+
+	* flow.c (propagate_block): Don't treat global regs as clobbered
+	over a CALL_INSN even if call-clobbered. 
+
+	* stmt.c (expand_end_stmt_expr): Correctly handle the case where an
+	expression statement  is just an auto-inc of a var.
+
+	* sparc.md (fix_trunc[sd]fsi2): Finish change to use MATCH_SCRATCH
+	by eliminating DEFINE_EXPAND and making DEFINE_INSN a named pattern.
+
+Wed May  8 13:31:23 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* cccp.c (rescan): Handle symbols before // as before /*.
+
+	* Makefile.in (objc-parse.o): Specify the command.
+
+	* c-parse.y (typespec): Fix previous change.
+
+	* reload1.c (choose_reload_regs): Use spillregs in round robin.
+
+Wed May  8 11:00:29 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* cplus-lex.c (tree_node_kinds): Renamed to `tree_node_counts'.
+
+Wed May  8 05:50:29 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* integrate.c (copy_rtx_and_substitute): Don't round frame size.
+
+	* loop.c: Must include insn-flags.h to get
+	HAVE_decrement_and_branch_until_zero.
+	* Makefile.in (loop.o): Likewise.
+
+	* expmed.c (expand_divmod): Use LOG instead of INTVAL (OP1)
+	once we start generating rtl.
+
+Wed May  8 05:38:06 1991  Michael Tiemann  (tiemann at cygint.cygnus.com)
+
+	* cplus-decl.c (duplicate_decls): Don't crash on duplicate
+	TEMPLATE_DECLs.
+	(globalize_nested_type): Handle globalizing types when
+	CLASS_BINDING_LEVEL goes out of effect.
+	(init_decl_processing): Comment out decls for ABS, FABS and LABS.
+	They conflict with libg++ inlines.
+
+	* cplus-decl2.c (build_push_scope): Fix bug in last change.
+	(finish_file): Make the dummy decl that we tack on to the global
+	scope a TYPE_DECL instead of a VAR_DECL.  Fake global VAR_DECLs are
+	problematic on some machines (i.e. MIPS).
+
+	* cplus-init.c (init_vfields): Use TREE_TYPE (VFIELDS) to find the
+	type for which the VFIELD was last distinguished.  This picks up
+	cases where single inheritance overrides base class vtables and the
+	base class does not get a new vtable for the override.
+
+	* cplus-parse.y (named_class_head_sans_basetype): Handle a
+	`template_type_name' by itself.  This happens with e.g.
+	friend class Stack<T>.
+
+	* cplus-pt.c (mangle_class_name_for_template): Put ',' between
+	parameters.
+	(push_template_decls): Don't crash if ARGLIST is ERROR_MARK_NODE.
+
+	* cplus-class.c (finish_base_struct): Compute MAX_HAS_VIRTUAL by
+	looking at all the base classes relevant to VFIELDS.
+	(build_vbase_path): Initialize NONNULL to zero.
+
+Tue May  7 23:47:42 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* stmt.c (any_pending_cleanups): Don't fail if block_stack is empty.
+
+Tue May  7 22:46:16 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* cse.c (simplify_binary_operation; case EQ, NE): Don't assume
+	the address of a symbol is non-zero.
+
+	* sched.c (schedule_insns): Ensure we free memory used by
+	schedule_block when using the C alloca.
+
+Tue May  7 14:13:57 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* reload1.c (mark_reload_reg_in_use): New arg MODE.  Mark all the regs.
+	(choose_reload_regs): Pass that arg; don't loop here.
+
+	* c-parse.y (typespec): Convert a TYPENAME to its meaning.
+
+	* fold-const.c (fold): Don't assume symbolic constant is nonzero.
+
+	* c-typeck.c (c_expand_asm_operands): Convert arrays, fcns to pointers.
+
+Mon May  6 23:29:21 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* cse.c (cse_insn): Only make a REG_WAS_0 note if the previous
+	set was to the same register, not just the same quantity;
+	if previous REG_WAS_0 note, update back pointer.
+	If setting a register to a constant, update QTY_CONST and
+	QTY_CONST_INSN so it points to the last set.
+	In special case for (set REG0 REG1), ensure any REG_WAS_0 notes are
+	updated correctly.
+
+	* genrecog.c (make_insn_sequence): Don't clobber `i' when it is
+	still needed.
+
+	* out-vax.c (print_operand_address): Fix bug in last change in handling
+	(plus (reg) (reg)).
+
+Mon May  6 16:41:50 1991  Torbjorn Granlund  (tege at zevs.sics.se)
+
+	* expmed.c (synth_mult): Make it handle t == 0. Improve comments.
+	Use (max_cost <= add_cost) instead of (max_cost < add_cost) to
+	determine if we should fail early (to better prune the search).  
+	Remove loop with n from factor synthesis.  Remove -2 bias from m
+	loop (for clearity).  Add code to use load-effective-address
+	instructions.  Use bit-fiddling instead of loop to determine q in
+	the last synthesis case.
+
+Mon May  6 11:21:45 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* c-typeck.c (convert_for_assignment): Reword an error message.
+
+	* c-typeck.c (build_conditional_expr): Typo in last change.
+
+	* Makefile.in (enquire, enquire.o): Depend on gnulib.
+
+Sun May 5 17:28:22 1991    (Eric Youngdale at youngdale@v6550c.nrl.navy.mil)
+
+	* make-cc1.com: Update for GCC 2.0; build insn-attr.h, insn-attrtab.c.
+	Compile and add obj to linker list: c-aux-info.c, c-common.c, c-lang.c,
+	aux-output.c, calls.c, dwarfout.c, function.c, reorg.c, sched.c,
+	sdbout.c, unroll.c, insn-attrtab.c.  Remove references to symout.c.
+
+Sun May  5 15:32:01 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* Makefile.in (rest.encap): Make gnulib before float.h.
+
+	* c-typeck.c (build_conditional_expr):
+	Don't assume symbolic constant is nonzero.
+
+	* reload1.c (choose_reload_regs): Ignore avoid_return_reg.
+	(reload_as_needed, reload): Don't bother setting avoid_return_reg.
+
+Sun May  5 14:30:14 1991  Michael Tiemann  (tiemann at cygint.cygnus.com)
+
+	* cplus-class.c (prev_class_type): Declare this to be static.
+	(build_vbase_path): Test NONNULL to decide whether a COND_EXPR is
+	actually needed.
+	(finish_struct): Another sort of hard virtual function to deal with
+	is one which comes from the non-leftmost baseclass, and who's index
+	is different between that class and the main derived class.  Use new
+	variable DOING_HARD_VIRTUALS to control when we punt and when we
+	plow through.
+	(modify_vtable_entry): If we find at this point that we have a hard
+	virtual function, just put it on the list PENDING_HARD_VIRTUALS if
+	DOING_HARD_VIRTUALS is nonzero.
+	(fixed_type_p): Handle SAVE_EXPR, RTL_EXPR, PLUS_EXPR, MINUS_EXPR,
+	NOP_EXPR and CONVERT_EXPR.
+	(pushclass): Fixed comment.  Also change test for whether this is
+	the top-level class scope from an obscure one to an obvious one, and
+	add comment.
+	(pushclass,popclass): Now always allocate a binding level.  Later
+	we'll have to rewrite this to actually use it.
+
+	* cplus-gc.c (type_needs_gc_entry): Don't need a GC entry for
+	ERROR_MARK_NODE.
+
+	* cplus-init.c (build_new): Set TREE_CALLS_NEW on RTL_EXPR.  This
+	gives us a case that `fixed_type_p' can grok.
+
+	* cplus-lex.c (identifier_type): Make this __inline if compiling
+	with GNU C.
+	(tree_node_kinds): Renamed to `tree_node_counts'.
+
+	* cplus-parse.y (various places): Take advantage of default rule
+	`$$ = $1', and where possible, use $$ instead of $1.
+	Also, back out change for setting `looking_for_typename' to 1 at top
+	level.
+
+	* cplus-decl2.c (build_push_scope): If the user gives X::foo in X's
+	scope, don't return a SCOPE_REF.  Just return `foo' instead.
+
+	* cplus-decl.c (init_decl_processing): Don't define `alloca' as a
+	built-in function until libg++ header files agree with its built-in
+	type.
+	(finish_decl): Don't crash if TYPE is error_mark_node.
+
+	* fold-const.c (split_tree): When splitting the tree, don't call
+	convert if the TYPE_MODEs are the smae.  This screws up C++ where
+	conversion of one pointer type to another can cause the pointer's
+	value to change.
+
+	* tree.c (get_identifier): Speed up `get_identifier' by about a
+	factor of 2.  This becomes noticable with the long names used for
+	C++ overloading.
+	(tree_cons): Make this most frequent user of `make_node' perform its
+	actions inline.
+
+	* calls.c (expand_call): Eliminate many (most) calls to strcmp by
+	being smarter about when to call it.  Also, don't call `push_block'
+	in the trivial case when it's not needed.
+
+Sun May  5 08:51:14 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* expr.c (convert_to_mode): Fix (for the second time) test for when
+	gen_lowpart should be called.
+
+	* cse.c (find_best_addr): Try to fold address.
+	(fold_rtx): Do associativity and (not (not ...)) checks here.
+	(cse_insn): Not here.
+
+	* combine.c (recog_for_combine): New parameter, PNOTES.
+	When we add a CLOBBER, put a REG_UNUSED note for it in *PNOTES.
+	(try_combine): Call recog_for_combine with new parameter.
+	Delete any now-invalid REG_UNUSED notes in OTHER_INSN and add any
+	required new ones.
+	Add REG_NOTES to I3 and I2 due to added CLOBBERs.
+	(remove_death): Call new function, remove_note.
+	(move_deaths): Don't get confused by a CLOBBER.
+	(distribute_notes): Don't make duplicate REG_UNUSED notes.
+	Don't put a REG_DEAD note on an insn when the register is
+	partially modified, but remains valid.
+
+	* rtlanal.c (remove_note): New function.
+
+	* combine.c (try_combine): When making a PARALLEL that does a compare
+	and arithmetic, don't simplify the COMPARE.
+
+	* combine.c (try_combine): Validate that I1DEST isn't being
+	modified invalidly.
+
+	* combine.c (simplify_comparison): In ZERO_EXTRACT case, add missing
+	test for equality comparison against zero; also invert comparison
+	condition.
+	If we can't do a comparison in a narrower mode, but we know that
+	some wider bits are zero, see if we can do it in a wider more.
+
+	* cse.c (simplify_binary_operation): Remove obsolete code to convert
+	negative shift counts to the opposite shift.
+	Don't fold invalid shifts since they may trap (e.g., on Vax).
+
+	* reload1.c (emit_reload_insns): Use rtx_equal_p to see if a result
+	is already in the desired register.
+
+	* combine.c (find_split_point): Add two more ways to split an insn.
+
+	* combine.c (gen_binary): Put a complex operand first in addition to
+	putting constants second, just like subst would do.
+
+	* combine.c (significant_bits): Correct computation of significant bits
+	for division operations.
+
+	* combine.c (apply_distributive_law): Reject complex SUBREGs.
+	SUBREG distributes over logical and addition operations.
+
+	* combine.c (subst; case AND, IOR, XOR): Add some boolean
+	arithmetic simplifications.
+
+	* expr.c (do_jump): ADDRESS_EXPR is not always zero, unfortunately.
+
+	* expr.c (do_store_flag): In case where we are testing a single bit,
+	don't convert to output mode until after we do the shift.
+	
+	* optabs.c (expand_binop, expand_unop, expand_fix): Compare
+	enum insn_code objects against CODE_FOR_nothing instead of 0.
+
+	* romp.md (bit_insv): Use CC0 in standard way; i.e., in NE.
+
+Sat May 4 20:41:12 1991    (Eric Youngdale at youngdale@v6550c.nrl.navy.mil)
+
+	* c-aux-info.c (gen_aux_info_record): Use getcwd on VMS a la USG.
+	* dbxout.c: Same here.
+	* xm-vms.h: Define unlink as remove
+	(GCC_INCLUDE_DIR): Provide a dummy definition.
+
+Sat May  4 16:46:48 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* combine.c (can_combine_p, try_combine): Use SMALL_REGISTER_CLASSES
+	to indicate when it is valid to do combines involving hard registers.
+	* cse.c (canon_hash): #ifdef SMALL_REGISTER_CLASSES, don't record
+	hard registers unless they are fp, ap, sp or are fixed.
+	* loop.c (valid_initial_value_p): #ifdef SMALL_REGISTER_CLASSES, 
+	hard register aren't valid initial values.
+	* reload1.c (reload): Initialize FORBIDDEN_REGS depending on
+	whether we have small register classes or not.
+
+	* ns32k.md: Replace const_int with const_int_operand.
+	Remove HImode extractions.
+	Remove patterns assigning an AND to CC0.
+	(andcbxx3): Remove name and eliminate case with NOT as second operand.
+	(sbitx, cbitx): Remove patterns involving IOR and ASHIFT; add patterns
+	with ZERO_EXTRACT as destination.
+	(ibitx): Put ASHIFT as first operand in XOR.
+	(bitfield compare): Remove comparison of 1 bit field with 1; combine
+	converts this to comparison with zero.
+	(and-compare-branch): Fold PLUS or MINUS into constant, like combine
+	will do.
+	Remove patterns for reversed cases.
+	* out-ns32k.c (const_int): Deleted.
+	
+	* rtlanal.c (reg_used_between_p, reg_set_between_p): Use GET_RTX_CLASS.
+	(reg_set_p_1): If we are setting a MEM, don't think we are setting
+	registers used in its address.
+
+	* m68k.md (cmpsf, cmpdf, tstsf, tstdf for FPA): Use MATCH_SCRATCH.
+	* sparc.md (memory store patterns): Likewise.
+
+	* function.c (assign_parms): Function is varargs function if the
+	last parameter is `__builtin_va_alist_' instead of checking the first
+	parameter.  Normally, this is the same, but some functions in MACH
+	have named parameters before va_alist.
+
+	* combine.c (simplify_comparison): Remove abort on paradoxical SUBREGs
+	now that we know they can occur.
+
+	* reload.c (decompose): Handle SCRATCH; it can't conflict with
+	anything.
+	(find_reloads): All operands can set earlyclobber, not just REG & MEM.
+	Add support for "X" constraint.
+	SCRATCH does not match "g" constraint.
+
+Sat May  4 14:03:16 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* enquire.c (EPROP): Avoid a <= out if bad is set.
+
+	* SYSCALLS.c: Test bsd4_2 along with BSD.
+
+Fri May  3 14:26:51 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* c-decl.c (pushdecl): Stop looping on type if find error mark.
+
+	* loop.c (invariant_p): An address with a PLUS is not the same as
+	MEM_IN_STRUCT_P being set.
+
+	* tree.h (TREE_NO_UNUSED_WARNING): New macro.
+	* stmt.c (warn_if_unused_value): That flag suppresses warnings.
+	* c-typeck.c (build_unary_op): Set flag when converting postinc.
+
+Fri May  3 08:09:47 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* tm-m88k.h (GO_IF_LEGITIMATE_ADDRESS): Remove workarounds for
+	register elimination problems.
+
+Fri May  3 07:14:22 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* a29k.md: Fix typo in dmac pattern.
+	Make many define_splits that convert DFmode and DImode to one word
+	at a time to operate only after reload completes to improve reg alloc.
+	(movdf): Correct typo in mfacc.
+	(rotlsi3): Count is QImode, not SImode.
+
+	* tm-a29kunix.h (BIGGEST_ALIGNMENT): Change to 64.
+	
+	* tm-romp.h (OPTIMIZATION_OPTIONS): Enable insn scheduling.
+	(register definitions): No longer need dummy register and class;
+	register numbers for FP register change.
+	* romp.md: Use MATCH_SCRATCH instead of allocating pseudos
+	to the dummy register class or base register depending on alternative.
+	(FP insns): Add missing "=" to constraints in CLOBBERs.
+	(extendqisi2, extendqihi2): Now DEFINE_EXPAND.
+	(mc03 peephole): Can do if right shift >= 24 bits.
+	* out-romp.c (reg_15_operand): Remove special case for FP delay slot.
+	(romp_sa_size, output_fpop, output_loadsave_fpops, output_fpops):
+	Change floating-point register numbers.
+
+	* combine.c (simplify_shift_const, case for shifts): Verify that 
+	the host word size is wide enough.
+	Properly handle (ashift (subreg (ashiftrt ...) ...) ...).
+
+	* out-vax.c (print_operand_address, case PLUS): Handle all addresses
+	accepted by GO_IF_LEGITIMATE_ADDRESS.
+
+	* explow.c (plus_constant): force_const_mem does not necessarily
+	return a valid address.
+	* integrate.c (copy_rtx_and_substitute): Likewise.
+
+	* Makefile.in (local-alloc.o): Includes output.h.
+	* rtl.def (SCRATCH, MATCH_SCRATCH): New RTL codes.
+	* regs.h (max_scratch): Add definition.
+	* genconfig.c (walk_insn_part): Handle MATCH_SCRATCH.
+	* genextract.c (walk_rtx): Likewise.
+	* genemit.c (max_operand_1): Likewise.
+	(gen_exp): Emit a SCRATCH for for MATCH_SCRATCH.
+	(gen_insn): We can create (clobber (scratch)).
+	* genoutput.c (scan_operands): Handle MATCH_SCRATCH;
+	use switch instead of if's.
+	* genrecog.c (make_insn_sequence): We can created (clobber (scratch)).
+	(add_to_sequence): Handle MATCH_SCRATCH.
+	* flow.c (life_analysis): Initialize max_scratch.
+	(propagate_block): Update max_scratch with count from this block.
+	(mark_set_1): Make REG_UNUSED note for SCRATCH and count it.
+	* local-alloc.c: Include output.h.
+	(qty_scratch_rtx): New variable.
+	(alloc_qty): Rename INSN_NUMBER to BIRTH since that's what it is.
+	(alloc_qty_for_scratch): New function.
+	(local_alloc): Account for quantities needed for SCRATCH.
+	Allocate and initialize qty_scratch_rtx.
+	(block_alloc): Allocate quantities for SCRATCH operands.
+	(requires_inout_p): Add "X" constraint.
+	* recog.c (scratch_operand): New function.
+	(constrain_operands): SCRATCH matches a register constraint unless
+	strict.
+	Add "X" constraint.
+	* regclass.c (reg_class_record): Add "X" constraint.
+	* reload1.c (emit_reload_insns): Add SCRATCH to test for operand that
+	dies right away; update REG_UNUSED note for SCRATCH.
+	Never need reload insn for SCRATCH, even if no REG_UNUSED note.
+	* rtlanal.c (reg_mentioned_p, reg_overlap_mentioned_p, rtx_equal_p):
+	Support SCRATCH.
+	(volatile_refs_p, side_effects_p, may_trap_p): Likewise.
+	(inequality_comparisons_p, replace_regs): Likewise.
+
+	* flow.c (mark_set_1): Don't do anything special with partial
+	assignments; this is already handled by mark_used_regs and we now
+	want to make LOG_LINKS for these.
+
+	* combine.c: Includes expr.h.
+	(expand_field_assignment, make_extraction): New functions.
+	(get_pos_from_mask, make_field_assignment): Likewise.
+	(can_combine_p): Remove special case for SUBREG in SET_DEST; call
+	expand_field_assignment instead.
+	(try_combine): Remove code to handle STRICT_LOW_PART here.
+	Call expand_field_assignment on SETs in I3.
+	(find_split_point): Split up simple cases of bitfield assignments.
+	(subst, case ZERO_EXTRACT): Remove processing of ZERO_EXTRACT in a
+	SET_DEST from here.
+	(subst, case SET): Try to convert this into a field assignment by
+	calling make_field_assignment.
+	No need to call make_compound_operation for COMPAREs;
+	make_compound_operation now returns an rtx and is no longer passed
+	a pointer.
+	Remove tests for ZERO_EXTRACT in SET_DEST.
+	(make_compound_operation): Now returns rtx and is passed rtx, instead
+	of rtx *.
+	Call make_extraction.
+	(simplify_comparison): Call make_compound_operation here and remove any
+	outermost SUBREGs that aren't doing anything.
+
+	* Makefile.in (combine.o): Includes expr.h.
+
+	* expr.c (convert_to_mode): Correct which cases can use gen_lowpart.
+
+	* final.c (final_scan_insn): Don't set INSN_DELETED_P after writing
+	insn.
+
+	* genoutput.c (main): Don't include aux-output.c in insn-output.c.
+	Include stdio.h before output.h.
+	(output_epilogue): Write definitions for all the predicates
+	placed in `insn_operand_predicate'.
+	* output.h: No longer need to define operand-predicate functions.
+	* configure: (m88k/dg): Only difference between xm-m88k{,dgux}.h was
+	definition of SEPARATE_AUX_OUTPUT, so we don't need xm-m88kdgux.h.
+	* xm-m88kdgux.h: Deleted.
+	Fix typo setting `target' in Makefile.
+	* Makefile.in (AUX_OUTPUT2): Deleted.
+	(OBJS): Remove AUX_OUTPUT2 and add aux-output.o.
+	(aux-output2.o): Now aux-output.o.
+	(insn-output.o): No longer depends on aux-output.c.
+	* make-m88kdgux (AUX_OUTPUT2): No longer define.
+	* tm-m68k.h, tm-romp.h, tm-sparc.h: Define functions in out-*.c and
+	used by insn-output.c.
+	* tm-m88k.h: Remove conditionalization for SEPARATE_AUX_OUTPUT; now
+	always done.
+	No longer define predicate functions; done by genoutput.c.
+	* tm-mips.h: No longer define SEPARATE_AUX_OUTPUT.
+	* out-*.c: Add includes previously present in insn-output.c.
+	* out-sparc.c (output_fp_move_double): No longer static.
+	(output_sized_memop): No longer need to define asm_out_file here.
+	(output_function_epilogue): Correct type; function is void, not char *.
+
+Fri May  3 01:05:44 1991  Micheal Tiemann  (tiemann at pogo.gnu.ai.mit.edu)
+
+	* sdbout.c (sdbout_one_type): TYPE_FIELDs may contain other kinds of
+	_DECL nodes than just FIELD_DECL nodes (in GNU C++, at least).
+	Don't look through such nodes until further mods are made to handle
+	them better.
+
+Thu May  2 14:43:48 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* c-decl.c (finish_enum): Don't store enum type as type of value.
+
+	* c-parse.y (YYPRINT, yyprint): New macro and new function.
+
+	* expmed.c (expand_and): Handle both args constant.
+
+	* expr.c (store_field): Avoid refetching from bitfield if possible.
+
+	* math-68881.h (pow): Negate x if negative when taking log.
+
+	* expr.c (emit_move_insn): Fixed typo in `y1 = change_address' call.
+	Reenable the code to move objects word at a time.
+
+Thu May  2 12:29:16 1991  Eric Youngdale  (youngdale at v6550c.nrl.navy.mil)
+
+	* cccp.c (hack_vms_include_specification): Modified conversion of
+	unix filenames to VMS filenames, if no VMS device or directory is
+	present, and a unix style directory name is present, then use the
+	first unix directory name as the VMS device spec. This is only
+	used in '#include <...>' type includes, when the include file has
+	not been found in the standard locations.
+
+Thu May  2 10:06:47 1991  Micheal Tiemann  (tiemann at pogo.gnu.ai.mit.edu)
+
+	* cplus-decl.c (init_decl_processing): Call init_gc_processing if
+	-fgc is requested.
+	* cplus-init.c (build_new): Argument to build_compound_expr must be
+	a TREE_LIST all the way.  The last elt of the chain cannot be an
+	_EXPR.
+
+Thu May  2 07:33:50 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* expr.c (expand_expr, case CONVERT_EXPR): Pass bitsize to store_field
+	instead of size in bytes.
+
+Wed May  1 13:33:58 1991  Micheal Tiemann  (tiemann at pogo.gnu.ai.mit.edu)
+
+	* version.c: Bumped version number to 1.93.
+
+Wed May  1 12:26:36 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* gcc.c (link_command_spec): Pass plain -m to ld.
+
+	* c-decl.c (finish_enum): Clean up re-laying out of type.
+
+Wed May  1 08:04:44 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* Makefile.in: Handle new cplus-*.c files.
+
+	* cplus-typeck.c (common_base_type): Make this function recursive.
+	(build_component_ref): Test whether or not a FIELD_DECL, not whether
+	or not a VAR_DECL||CONST_DECL||TYPE_DECL.
+
+	* cplus-parse.y: Fixed grammar so that template type decls could be
+	used.  Previously, support existed for template decls following
+	types, but not as types.
+	* cplus-pt.c ({push,pop}_template_decls): New functions.
+	(instantiate_template): Call `push_template_decls'.
+	(end_template_instantiation): Let `poplevel' restore old bindings.
+	No need to clear out extra stuff.
+	(pushclass, popclass): Call `{push,pop}_template_decls' if the class
+	we are pushing or popping has template arguments.  These arguments
+	go at class level.
+
+	* cplus-method.c (build_opfncall): Test TRY_SECOND before testing
+	possibly uninitialized XARG2.
+
+	* cplus-lex.c (init_lex): Initialize NODE_TABLE, OPNAME_TAB and
+	ASSIGNOP_TAB to hold zero.  Since these come from malloc'd memory,
+	we cannot trust them to be initialized on startup.
+
+	* cplus-init.c (expand_aggr_init_1): When initializing through a
+	TARGET_EXPR for objects of the same type (e.g., X a = X (10);)
+	use EXP's DECL_RTL as the DECL_RTL of the TARGET_EXPR.
+
+	* cplus-decl2.c (finish_file): Handle new flag `-fgnu-binutils'.
+	When zero, don't use GNU extensions to a.out format.  ???Should be
+	merged into varasm.c.
+
+	* cplus-class.c: Added support for `dossiers'.  This support is
+	implemented by extending the virtual function table and by giving
+	all C++ objects a virtual function table to hold it's dossier.
+	* cplus-decl.c (record_builtin_type): New function to construct
+	dossier information for built-in types.
+	(output_builtin_tdesc_entries): To keep repeated information under
+	control, we only output this information for the file that contains
+	`main'.
+	(init_decl_processing): Many dossier-related changes.	
+	(init_lex): Recognize new reserved words `headof' and `classof' if
+	-fgc.
+	* cplus-parse.y: Grammar now recognizes `headof' and `classof'
+	expressions.
+	* cplus-method.c: Added dossier constructors here.
+	* cplus-tree.h (CLASSTYPE_DOSSIER): New macro: `dossier' is a new
+	field in lang_type.
+	* cplus-typeck.c (convert_for_assignment): Handle
+	`class_star_type_node'.
+
+	* cplus-class.c: New variable current_class_depth.  Used to tell
+	what class nesting level the compiler is at.
+	* cplus-decl.c (grokdeclarator): Now supports references to decls
+	that come from nested types.  For example, int foo::bar (foo_tag);
+	where `foo_tag' is a tag that comes from foo.  Previously this was
+	supported only as int foo::bar (foo::foo_tag);
+	* cplus-decl2.c (build_push_scope): build a SCOPE_REF node while
+	pushing into the context for the scope.  When `grokdeclarator' sees
+	one of these nodes (distinuished by its TREE_COMPLEXITY being set to
+	the current_class_depth), it processes the decl and pops the scope.
+
+	* cplus-class.c (build_vbase_path): Trust objects that are
+	`fixed_type_p'.  Also, don't assume an object is non-null unless
+	flag says this is explicitly so.  InterViews creates and may
+	manipulate (via delete) lots of null objects.
+	(build_vfn_reference): Use IS_AGGR_TYPE test on type, not in
+	INSTANCE.
+	(resolves_to_fixed_type_p): New argument NONNULL is used in case we
+	know and object to be non-zero.  All callers changed.
+
+	* cplus-call.c: New file, from file cplus-class.c.  Contains code to
+	generate method calls.
+ 	* cplus-class.h: New file, contains common declarations for
+	cplus-class.c and cplus-call.c.
+
+	* cplus-class.c (finish_struct_bits): Don't leave last_conversions
+	uninitialized.
+
+Tue Apr 30 17:14:00 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* expr.c (expand_expr):
+	Preserve volatility when changing ARRAY_REF to use a pointer.
+
+	* vax.md (indirect_jump): Use parens around register, not @.
+
+	* fixincludes (machine/cpu.h): Delete superfluous `static'.
+
+	* tm-decstatn.h (CPP_PREDEFINES): Define __mips and __LANGUAGE_C.
+
+	* explow.c (allocate_dynamic_stack_space): Compensate if
+	STACK_POINTER_OFFSET throws off the alignment.
+
+	* loop.c (strength_reduce): Typos setting not_every_iteration.
+
+Tue Apr 30 16:10:32 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* vax.md (bicb): Fix typo that caused operand not to be negated.
+	(jlbs/jlbc): Operand[0] cannot be a constant.
+
+	* rtl.h: Put NOTE_INSN_... codes in order.
+	(find_regno_note): Add missing definition.
+
+	* reload.c (find_reloads_address): Handle an indexed stack slot that
+	is made out of range by frame pointer elimination.
+
+Tue Apr 30 14:09:28 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* toplev.c (compile_file): Output gcc2_compiled, not gcc_compiled.
+	* tm-tower-as.h (ASM_IDENTIFY_GCC): Likewise.
+
+Tue Apr 30 13:56:40 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* varasm.c (output_addressed_constants): Return and indication of
+	whether the variable requires link-time relocations.
+	(assemble_variable, get_or_assign_label): Use this value when
+	choosing the section.  Use the data section for variables and
+	constants that are otherwise read-only when -fpic is given and
+	when link-time relocations are required.
+	* tm-*.h (SELECT_SECTION): Accept a new second parameter RELOC.
+
+Tue Apr 30 10:24:36 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* rtl.h (NOTE_INSN_LOOP_VTOP), rtl.c (note_insn_name): Add a new
+	note indicating the virtual top of a loop.
+	* jump.c (duplicate_loop_exit_test): Mark the duplicated exit code
+	in the loop as the virtual top of the converted loop.
+	(squeeze_notes): Move loop-vtop notes as well.
+	* loop.c (scan_loop): When a loop-vtop note is encountered, reset
+	`maybe_never' and `call_passed'.
+	(strength_reduce): Similarly, reset `not_every_iteration'.
+
+Tue Apr 30 08:15:50 1991  Michael Meissner  (meissner at osf.org)
+
+	* expr.c (do_store_flag): Move the join label after setting the
+	target value to 0, rather than before, which generates code that
+	always stores 0 into the target if the machine does not have a
+	builtin scc operation.
+
+Tue Apr 30 06:26:36 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* reload1.c (reload): When making reg_equiv_mem and reg_equiv_address
+	from reg_equiv_memory_loc, clear the one we aren't setting; it might
+	have been previously set.
+
+	* final.c (final_scan_insn): Correctly handle when the first insn in a
+	SEQUENCE is a JUMP_INSN that forces restoration of a comparison
+	previously thought unnecessary.
+
+	* fold-const.c (fold, case PLUS_EXPR): If we have 2 * real_cst, 
+	fold into a new constant instead of making real_cst + real_cst.
+
+Mon Apr 29 23:09:17 1991  Ken Raeburn  (raeburn at watch.com)
+
+	* cplus-decl.c (output_builtin_tdesc_entries): Corrected
+	declaration of permanent_obstack.
+	(init_decl_processing): Record declaration of int with name "int"
+	rather than null.
+	(finish_decl): Fix typo in comment.
+
+	* cplus-class.c (finish_struct): Made error message for union
+	member requiring constructor/destructor a little tidier.
+	(resolve_scope_to_name): Look at fields of current type as well as
+	tags, in case of local typedefs.
+	(build_method_call): Permit explicit call of destructor in class
+	that doesn't have one.  (That's what the ARM says....)
+
+	* cplus-decl.c (set_nested_typename): New function, extracted from
+	within pushtag.  Extended to deal with null classname.
+	(pushtag): Call it.
+	(pushdecl): For a TYPE_DECL, ensure that the nested typename gets
+	set.
+	(pushdecl_class_level): Ditto.
+	(constructor_name): Test various assertions.
+	(hack_incomplete_structures): If type is a class template, punt.
+
+	* cplus-input.c (getch): Renamed from get_character.  Callers
+	changed.
+	cplus-lex.c (old getch): Deleted.
+
+	* cplus-lex.c (save_pending_input, restore_pending_input): New
+	functions for saving and restoring lexer state.
+	(process_next_inline): Restore lexer state after each function.
+	cplus-pt.c (end_template_instantiation): Ditto.
+	cplus-input.c (struct input_source, getch, feed_input): Preserve
+	putback_char and lexer state.
+
+	* cplus-input.c (getch): Return magic cookie on end of saved input
+	for lexer to recognize.
+	cplus-lex.c (yylex): Turn it into END_OF_SAVED_INPUT.
+	(process_next_inline): Require it after inline function body.
+
+	* cplus-lex.c (do_pending_inlines): Don't save away current
+	file/line-no info; character input processing should do that.
+	(yyungetc): Turn conditional abort into assertion test.
+	(note_list_got_semicolon): Since variable "type" is available, use
+	it rather than recompute.
+	(identifier_type): Now static.
+	(yylex): Warn about conflicts with class template expansion names.
+
+	* cplus-parse.y (temporary_scope): New variable.
+	(object and scoped_id actions): Set it to current type.
+	(many other actions): Clear it.
+	(scoped_typename): Now derivable also from scoped_id and TYPENAME.
+	cplus-lex.c (yylex): If temporary_scope is set, use it to
+	determine type of current token being examined, instead of looking
+	always in the global scope.  (Can't properly do nested template
+	classes otherwise.)
+
+	* cplus-ptree.c (print_lang_decl): Print out template-info,
+	original-name, decl-main-variant, and pending-inline-info nodes if
+	not null.
+
+	* cplus-pt.c (mangle_class_name_for_template): For negative
+	numbers, use "m" prefix rather than printf's "-".
+	(overload_template_name): Test more assertions.  Use
+	SET_IDENTIFIER_TYPE_VALUE macro.
+	(lookup_template_class): Assert template decl node is non-null.
+	Push to permanent obstacks for new allocations.
+	(instantiate_template): Return new class type in a list.
+
+	* cplus-pt.c (undo_template_name_overload): Clear type local
+	definition of template name.
+	(end_template_instantiation): Call it.
+	cplus-parse.y (structsp actions): Ditto.
+	(named_class_head_sans_basetype): Don't call
+	overload_template_name here.
+	(named_class_head): Call xref_tag, to define a tag, before calling
+	it here.
+
+	* cplus-parse.y (tmpl.1, tmpl.2): Delete type declarations, since
+	they have no values.
+	(yyprint, YYPRINT): New function and macro to work with debugging
+	code added to bison.
+	(datadef -> template_header... actions): Assign yychar, rather
+	than calling yyungetc and yylex.  Require trailing semicolon.
+	(fn.def1 -> PRE_PARSED_FUNCTION_DECL action): Preserve all of
+	terminal value, instead of just TREE_PURPOSE.
+	(tmpl.1 action): Do instantiation only if '{' or ':' not found.
+	(template_instantiation): Call overload_template_name right away.
+	(primary -> .scope new '(' typename ')' '[' ...): Detect and warn
+	about this construct, which appears to be recognizeable, though
+	disallowed by the ARM.
+	(primary -> delete[]): Return error_mark_node.
+	(primary -> obj TYPESPEC::~TYPESPEC()): Catch, parse as valid.
+	Returned value not determined yet.
+	(typespec): No longer derived from PTYPENAME.
+	(LC): Added missing semicolon at end of rule.
+	(stmt): A PTYPENAME can also be used as a label name.
+
+Mon Apr 29 22:18:47 1991  James Van Artsdalen  (james at bigtex.cactus.org)
+
+	* tm-att386.h (ASM_OUTPUT_LOCAL): Align static local variables.
+
+Mon Apr 29 15:20:35 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* fold-const.c (fold): Don't assume an address is nonzero.
+	* cse.c (fold_rtx): Likewise.
+
+	* stmt.c (warn_if_unused_value): No warning for cast of cast of modify.
+
+	* Makefile.in (USER_H): Remove float.h.
+
+Mon Apr 29 13:46:48 1991  Jim Wilson  (wilson at cygnus.com)
+
+	* loop.c (scan_loop): When see a REG_EQUAL note, check for both
+	the move_insn and the REG_RETVAL case, since they can occur together.
+	(move_movables): For the move_insn case, handle library calls just
+	like the older normal case code below, that is, skip to the end of a
+	library call when when see a REG_LIBCALL note, and delete an entire
+	library call if when see a REG_RETVAL note.
+
+Mon Apr 29 12:58:19 1991  Jim Wilson  (wilson at cygnus.com)
+
+	* sched.c: (schedule_block): Rewrite code that computes which
+	registers are live at the end of the block.  Compute this from
+	basic_block_live_at_start info of current block, instead of from
+	all reachable blocks.  Previous code failed if one of the
+	reachable blocks consisted of dead code.
+	(sched_note_set): Set bb_live_regs when DEATH is false.
+
+	* sched.c: Update copyright.  Correct various problems with
+	indentation and white space.
+	(canon_rtx): Delete obsolete code handling INSN_LIST rtx.  Add
+	code to recurse on the operands of a PLUS rtx.
+	(find_symbolic_term): New function.  Recursively search an rtx for
+	a SYMBOL_REF or a LABEL_REF and return pointer to one if found.
+	(memrefs_conflict_p): No longer needs to call canon_rtx on
+	operands of a plus.  Now handles case of two addresses with
+	different base addresses.
+	(schedule_block): Don't set INSN_DELETED_P bit of ignored notes.
+	Verify that REG_DEAD notes have a register value.
+	(sched_analyze_1): Ifdef out obsolete code which calculates cc0
+	dependencies.
+	(sched_analyze): Likewise.
+	(schedule_block): Likewise.
+	(launch_links): Delete obsolete code for handling SPARC	'orcc' insns.
+
+Mon Apr 29 12:09:32 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* configure: Allow spaces between options and their args.
+
+Mon Apr 29 06:35:09 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* jump.c (jump_optimize): Don't emit jump to next insn; this would
+	cause jump_optimize to loop.
+	(jump_optimize, duplicate_loop_end_test, do_cross_jump): Never put
+	insn in jump_chain if its INSN_UID is too large.
+	(redirect_tablejump): Likewise.
+
+Sun Apr 28 08:00:01 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* cplus-decl.c (init_decl_processing): Merge changes in builtin
+	function handling to match the way that c-decl.c now works.
+	Also add global variables to support that change.
+	(define_function): Ditto.
+
+	* cplus-decl2.c: Add flags for gc and xref.
+	* cplus-tree.h (DECL_GC_OFFEST): New macro for gc.
+	* cplus-tree.h: Rearrange CLASSTYPE_ASSOC and CLASSTYPE_BASETYPES so
+	that the former now uses TYPE_LANG_SPECIFIC storage, and the latter
+	uses TYPE_BASETYPES.
+	* cplus-tree.h: Change overload names of new and delete to `nw' and
+	`dl'.  Formerly, `new' was being seen as `ne', the encoding for `not
+	equal'.
+
+	* cplus-xref.c: New file.  Adds support for generating
+	cross-reference information such as a class browser or program
+	analyzer would use.
+
+	* cplus-gc.c: New file.  Add support for garbage collection.
+	* cplus-decl.c (finish_decl): Tie decls to their places in the
+	garbage collector.
+	* cplus-init.c (build_new): Added hooks for gc.
+	* cplus-typeck.c (convert_arguments): protect arguments from the
+	garbage collector if -fgc.
+	(build_modify_expr): More gc-related changes.
+
+Fri Apr 26 07:31:26 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* integrate.c (expand_inline_function): Add missing increment of I.
+
+Thu Apr 25 11:07:11 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* m88k.md (various patterns): Use nonimmediate_operand in place of
+	reg_or_nonsymb_mem_operand and constraint `m' in place of `Q'.
+	* tm-m88k.h (EXTRA_CONSTRAINT): Only needed for a call address.
+	* out-m88k.c: reg_or_nonsymb_mem_operand and symbolic_memory_p are
+	now unused.
+
+	* m88k.md (symbolic store patterns): These patterns are all
+	unnecessary and are deleted.
+	* out-m88k.c (emit_move_sequence): Eliminate the case that
+	generated a CLOBBER.  This was intended to use the symbolic store
+	patterns, but isn't needed.
+	(symbolic_memory_operand): Delete, no longer used.
+	(output_prologue): Don't check for suspicious register elimination
+	changes.
+	* tm-m88k.h (GO_IF_LEGITIMATE_ADDRESS): Treat the frame pointer
+	like the argument pointer as both may change to REG+SMALLINT.
+
+Tue Apr 23 15:08:03 1991  Jim Wilson  (wilson at cygnus.com)
+
+	* out-sparc.c (output_scc_insn): Clean up and expand comments.
+	Don't assume that JUMP_LABEL fields are always valid, they aren't
+	when compiling without optimization.
+
+Mon Apr 22 13:56:43 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* cplus-class.c (prepare_fresh_vtable): Thoroughly update virtual
+	function tables that come from baseclasses to contain the latest
+	overrides from derived classes.  This was done (in a different way)
+	for virtual baseclasses, but left undone for non-virtual
+	baseclasses.
+	(finish_struct_bits): Use assoc lists instead of class basetype list
+	to walk through the classes base classes.  This gives us more
+	relavant classes to check against.
+	* cplus-init.c (init_vfields): New function to recursively walk
+	objects and make sure their vfields are initialized.
+	* cplus-init.c (emit_base_init): Call `init_vfields' from top level.
+
+	* cplus-tree.h (TYPE_IDENTIFIER): New macro, gives the
+	IDENTIFIER_NODE for a given aggr TYPE.
+	* cplus-class.c (add_method): Use TYPE_IDENTIFIER.
+	* cplus-cvt.c (various places): Ditto.
+
+	* cplus-class.c (finish_struct): Add TYPE_DECLs to the list of a
+	class's members that come from the types implicitly declared tags.
+
+	* cplus-decl.c (grokdeclarator): If a function is declared `static
+	inline', don't give it global visibility, regardless of what #pragma
+	interface/implementation suggests.
+
+	* cplus-decl.c (finish_function): ??? Questionable change for PIC:
+	don't let constructors and destructors that manipulate vtables go
+	inline, since this somehow reduces page sharing.  Really???
+
+	* cplus-except.c (init_exception_processing): Use `pushdecl' to
+	install global info that this function sets up.  That way later
+	decls can override this info (such as with an inline function).
+
+	* cplus-init.c (build_vec_delete): Set TREE_SIDE_EFFECTS of
+	controller.  Otherwise the loop won't execute.
+
+	* cplus-method.c (prepare_inline): Rewritten and simplified.
+	(do_inline_method_hair): Ditto.
+
+	* cplus-tree.c (lang_output_debug_info): Only output nested type if
+	we would also output enclosing type.
+
+	* cplus-typekc.c (c_expand_return): Use pseudo for intermediate
+	return value if necessary.  GCC can't read the function return
+	registers in an inline functino when the return value is being
+	ignored.
+
+Mon Apr 22 14:36:01 1991  Jim Wilson  (wilson at cygnus.com)
+
+	* sched.c (init_alias_analysis): Handle REG_EQUIV notes just like
+	REG_EQUAL notes.
+
+	* sched.c (sched_analyze_2): Don't recurse on constant rtx's.
+	This is necessary so that the cc0_rtx in CONST_DOUBLEs won't be seen.
+	(sched_analyze): Call sched_analyze_insn for JUMP_INSNS	also, so
+	that cc0 users will get an automatic dependence on their previous
+	insn.
+	(launch_links): Ifdef out special treatment of insns which set the
+	condition codes.  This is obsolete, and was SPARC specific anyways.
+	(new_sometimes_live): Clarify code that aborts if regno is greater
+	than max_regno.
+	(schedule_block): If the last insn sets cc0, then it must always
+	be left	in place.
+	(new_insn_dead_notes): New function.  Determines whether a SET or
+	CLOBBER in an insn created by splitting needs a REG_DEAD or
+	REG_UNUSED note added.
+	(update_links): Ignore REG_EQUIV and REG_EQUAL notes on insns that
+	have more than one set.  Generalize flow analysis of the sets in
+	the new insns so that it can handle new insns which have multiple
+	sets or new clobbers.
+
+Mon Apr 22 08:15:50 1991  Michael Meissner  (meissner at osf.org)
+
+	* gcc.c (input_suffix): New global var; holds current file's suffix.
+	(handle_braces): Substitute X in %{.S:X} if the current file has
+	suffix .S.  Similarly, substitute X in %{!.S:X} if the current file
+	does not have suffix .S.
+	(validate_switches): Ignore .S part in %{.S:X} construct.
+
+Sat Apr 20 14:41:17 1991  Micheal Tiemann  (tiemann at pogo.gnu.ai.mit.edu)
+
+	* final.c (leaf_function_p): Define this in any event.
+
+Sat Apr 20 10:45:43 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* loop.c (check_dbra_loop): Use GET_RTX_CLASS when appropriate.
+	Check for setting biv with single_set rather than only allowing a SET.
+	If a loop has a `break', we can't reverse it.
+
+	* cse.c (cse_insn): Fold inside operands of a CALL (mostly to find the
+	best address form to use).
+
+	* cse.c (simplify_unary_operation): Convert (neg (neg ..)) to NEG.
+	Similarly for NOT.
+	(simplify_binary_operation): Simplify things like (-a) + b.
+	Convert UDIV with divisor a constant power of two into LSHIFTRT.
+	Similarly for UMOD.
+	Only fold shifts of a zero by a value into zero if the value has
+	no side effects.
+	Remove code to handle negative shift counts.
+
+	* tm-a29k.h (OPTIMIZATION_OPTIONS): Allow insn scheduling to be
+	enabled, now that it works for the 29k.
+
+	* tm-rs6000.h (LINK_SPEC): Add "-bhalt:4" to LINK_SPEC (don't ask!).
+
+Fri Apr 19 13:18:52 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* explow.c (memory_address): Test `cse_not_expected' instead of
+	`optimize' so that we don't make new pseudos after flow is run.
+
+	* genflags.c (gen_insn): If extra condition is more than one line,
+	use \'s to make proper multi-line macro definition.
+
+Thu Apr 18 13:40:01 1991  Jim Wilson  (wilson at cygnus.com)
+
+	* loop.c (check_dbra_loop): Reenable no_use_except_for_counting code
+	which was mistakenly ifdefed out as buggy.  The actual bug was in
+	strength_reduce, and has already been fixed.
+
+Thu Apr 18 09:47:25 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* loop.c (record_giv): Allow for the case where regno_last_uid
+	of DEST_REG has been moved or deleted.
+
+	* rtlanal.c (replace_regs): Add missing argument in recursive call.
+
+	* recog.c (nonmemory_operand): Only call general_operand for
+	a SUBREG if it is a MEM, just like register_operand.
+
+	* local-alloc.c (block_alloc): Handle case where the last insn of
+	a REG_NO_CONFLICT block requires some CLOBBERs, but is a single SET.
+
+	* out-romp.c, out-rs6000.c (next_insn_tests_no_unsigned): If a
+	REG_UNUSED note for (cc0) is present on INSN, return 1.
+
+	* jump.c (delete_jump): If the previous insn sets cc0 but we can't
+	delete it for some reason, add a REG_UNUSED note for cc0 in that insn.
+
+	* out-a29k.c: Rename input_operand to in_operand and output_operand
+	to out_operand to avoid conflict with output_operand in final.c.
+	* a29k.md: Likewise.
+	(call patterns): Don't put SYMBOL_REF in MEM for recursive call;
+	it might not be recursive if inlined; let cse do it later.
+	* tm-a29k.h (RTX_COST, ADDRESS_COST): All addresses have the same
+	cost, but MEM is expensive.
+
+Tue Apr 16 16:01:47 1991  Michael Meissner  (meissner at osf.org)
+
+	* configure: Add osfrose, osf, and mips/dec-osfrose.
+
+	* out-mips.c (toplevel): Include necessary include files so
+	out-mips.c can be compiled separately.
+	(g_switch_value): New variable to hold -G xx value.
+	(g_switch_set): New variable to indicate if -G xx used.
+	(current_function_file): New variable to hold last .file.
+	(file_in_function_warning): New variable to hold if we've warned the
+	user that ECOFF can't switch files within a function.
+	(mips_rtx_classify): New array to classify an insn.
+	(mips_reg_names): New array to hold the register names.
+	REGISTER_NAMES initializes all elements to point into here, and
+	override_options resets the names if -mrnames is used.
+	(mips_sw_reg_names): New array to hold the alternate register names.
+	(mips_regno_to_class): New array to map hard register number to
+	register class.
+	(uns_arith_operand): Rewrite so call to register_operand is done
+	last, not first.
+	(arith_operand): ditto.
+	(arith32_operand): ditto.
+	(large_int): New function to return true if int constant will take 2
+	instructions to load into a register.
+	(reg_or_0_operand): New function to return true if a register or
+	constant 0 is the operand for use in store patterns.
+	(md_register_operand): New function to return true if either the hi
+	or lo register is used.
+	(mips_const_double_ok): New function to return true if a
+	CONST_DOUBLE can be used as a constant in a RTL expression.  At
+	present, only DImode constants and 0.0 is allowed.
+	(simple_memory_operand): New function to return true if a memory
+	reference is a simple register + small offset.
+	(gp_memory_operand): New function to return true if a memory
+	reference uses the global pointer.
+	(mips_move_instructions): New function to handle all data movement
+	of one word or less.
+	(mips_move_2words_instructions): New function to handle all data
+	movement of two words.
+	(init_cumulative_args): Remove print_tree debug call.
+	(function_arg_partial_nregs): Fix bug in passing structures where
+	the wrong field was used.
+	(print_options): Enable this function, body was in #if 0.
+	(override_options): Spell function name with two r's.  Change how
+	the -G xx and -mGx options are handled.  If neither passed use the
+	appropriate default.  If -mgas make sure debug format is DBX, and if
+	not -mgas, use SDB debug format.  If -mrnames and -mgas, give an
+	error message, otherwise set up mips_reg_names.  Set up the
+	mips_rtx_classify array.
+	(print_options): New function instead of a long macro.  Add %C to
+	print part of the opcode for a branch condition, %N to print the
+	inverted branch condition, %( to do .set noreorder, %) to do .set
+	reorder, %[ to do .set noat, %] to do .set at, %& to do .set
+	noreorder if filling delay slots, and %# to print nop if delay slot
+	not filled.
+	(print_operand_address): New function instead of a long macro.
+	(compute_frame_size): New function to abstract all the frame related
+	information like frame size, saved registers, etc.
+	(save_restore): Common function between the prologue and epilogue to
+	save/restore the registers in the proper order.  Make $31 saved at
+	function pc +4.
+	(function_prologue): Call compute_frame_size and save_restore.  Make
+	sure the appropriate .file is done before any statement in the
+	prologue since the MIPS ECOFF requires this.
+	(function_epilogue): Call compute_frame_size and save_restore.
+
+	* tm-decstatn.h (CPP_PREDEFINES): Define the appropriate macros.
+	(*_SPEC): Move the DECstation related specs here from tm-mips.h.
+
+	* tm-decrose.h (new file): File to support OSF/1 with OSF/rose
+	object format.
+
+	* tm-mips-sysv.h (CPP_PREDEFINES): Define the appropriate macros.
+	(*_SPEC): Move the DECstation related specs here from tm-mips.h.
+
+	* tm-mips-bsd.h (CPP_PREDEFINES): Define the appropriate macros.
+	(*_SPEC): Move the DECstation related specs here from tm-mips.h.
+
+	* tm-mips-news.h (CPP_PREDEFINES): Define the appropriate macros.
+	(*_SPEC): Move the DECstation related specs here from tm-mips.h.
+
+	* tm-iris.h (CPP_PREDEFINES): Define the appropriate macros.
+	(*_SPEC): Move the DECstation related specs here from tm-mips.h.
+	(SET_FILE_NUMBER): Define, so that .file number is always 1.
+	(LABEL_AFTER_LOC): Define, so that a label appears after .loc.
+	(STACK_ARGS_ADJUST): Iris frames require 32 bytes at the top of the
+	call frame instead of the normal MIPS 16.
+
+	* mips.md (all): Add first cut at attributes to identify insn type.
+	(all): Where appropriate, use @ form for alternates, instead of
+	using C code.
+	(define_delay): Put arithmetic and one word stores in call, jump,
+	branch delay slots.
+	(define_function_unit): Add functional unit definitions for memory
+	and integer multiply/divide.
+	(anonymous add/subtract insn): Remove support for reg + large offset
+	that omitting the frame pointer caused in 1.xx to see if it is
+	needed anymore.
+	(mulsi3): Add clobbers for the hi/lo registers.  Add a define_split
+	and an anonymous define_insn to separate the mult instruction from
+	the mflo.
+	(divmodsi4): Add clobbers for the hi/lo registers.
+	(udivmodsi4): Add clobbers for the hi/lo registers.
+	(divsi3): Add clobbers for the hi/lo registers.  Restrict divides
+	and modulus to register / register.
+	(modsi3): ditto.
+	(udivsi3): ditto.
+	(ymodsi3): ditto.
+	(divide peepholes): Add two peepholes to catch divide followed by
+	modulus of the same values.
+	(anddi3): Remove pattern, use default behavior.
+	(iordi3): Remove pattern, use default behavior.
+	(xordi3): Remove pattern, use default behavior.
+	(truncsiqi2): Remove pattern, use default behavior.
+	(truncsihi2): Remove pattern, use default behavior.
+	(trunchiqi2): Remove pattern, use default behavior.
+	(truncdfsf2): Remove asm comment.
+	(extendhisi2): Add a define_split for shift case.
+	(extendqisi2): Add a define_split for shift case.
+	(extendqihi2): Add a define_split for shift case.
+	(movdi): Turn into a define_expand to guarantee that memory <->
+	memory moves go through a register.
+	(movsi): ditto.
+	(movhi): ditto.
+	(movqi): ditto.
+	(movsf): ditto.
+	(movdf): ditto.
+	(movdi_internal): new define_insn.  Add fp registers to the
+	alternatives.  Call mips_move_2words_instructions to do the actual
+	movement.  Require memory addresses to be offsetable.
+	(movdf_internal): ditto.
+	(movsi_internal): new define_insn.  Add storing 0 to memory
+	directly using $0.  Add transfer to/from multiply/divide registers,
+	and to the fp status register.  Call mips_move_instructions to do
+	the actual work.
+	(movhi_internal): ditto.
+	(movqi_internal): ditto.
+	(movsf_internal): ditto.
+	(jump): Add %& to turn on .set noreorder if filling delay slot.
+	(tablejump): Ditto.
+	(call): Ditto.
+	(call_value): Ditto.
+	(indirect_jump): New required pattern, add %& for delay slot.
+	(nop): Use %( %) to turn on/off .set noreorder.
+	(probe): Use %[ %] to turn on/off .set noat.
+
+	* tm-mips.h (abort): Define abort to be fancy_abort for now.
+	(toplevel): Move all extern's to the start of the file, rather than
+	scattered throughout.
+	(OPTIMIZATION_OPTIONS): New macro, -O sets -fomit-frame-pointer, and
+	-fdelayed-branch.  -O2 sets -fstrength-reduce, -fcse-follow-jumps,
+	-fexpensive-optimizations, -fthread-jumps, -frerun-cse-after-loop.
+	-O3 sets -finline-functions.
+	(*_SPEC): Move most of the target specific spec's to the appropriate
+	file, rather than defining them in tm-mips.h.  Defaults are for MIPS
+	RISC-OS with default system.
+	(CPP_SPEC): If preprocessing .S files, define LANGUAGE_ASSEMBLY
+	instead of LANGUAGE_C.
+	(MIPS_VERSION): Add meissner version number.
+	(MIPS_DEBUGGING_INFO): Define this for the future.
+	(TARGET_*): reorder which bit means what.  Add bits so we can tell
+	whether any of the -mG[012] options were used.  Redefine some debug
+	switches.
+	(BYTES_BIG_ENDIAN): Always define to 0/1 now.
+	(WORDS_BIG_ENDIAN): Always define to 0/1 now.
+	(MAX_PARM_BOUNDARY): Delete, since it's no longer used.
+	(BIGGEST_FIELD_ALIGNMENT): Define to be 64.
+	(CONSTANT_ALIGNMENT): New macro, make sure strings are aligned.
+	(DATA_ALIGNMENT): New macro, make sure byte arrays are aligned.
+	(FIRST_PSEUDO_REGISTER): Bump to 67, add hi, lo, fcr31.
+	(FIXED_REGISTERS): Add initializations for hi, lo, and fcr31.
+	(CALL_USED_REGISTERS): Add initializations for hi, lo, and fcr31.
+	(MD_REG_P): New macro to return if hi/lo register.
+	(ST_REG_P): New macro to return if fp control register.
+	(HARD_REGNO_NREGS): Return 4 for single precision complex.
+	(MODES_TIEABLE_P): Add complex float type support.
+	(FRAME_POINTER_REQUIRED): Make this always 0.
+	(NO_RECURSIVE_FUNCTION_CSE): New macro, define as 1.
+	(enum reg_class): Add class for the hi register, lo register, either
+	hi or lo registers, status registers.
+	(REG_CLASS_NAMES): Support new register classes.
+	(REG_CLASS_CONTENTS): ditto.
+	(REG_CLASS_FROM_LETTER): ditto.
+	(REGNO_REG_CLASS): Use an array to map register # -> class.
+	(CONST_OK_FOR_LETTER_P): Add `L' for constants which have bottom 16
+	bits all zero, and `M' which require two instructions to load.
+	(CONST_DOUBLE_OK_FOR_LETTER_P): Use `CONST_DOUBLE_HIGH' and
+	`CONST_DOUBLE_LOW'.
+	(EXTRA_CONSTRAINT): New macro, `Q' for gp memory references, and `R'
+	for reg + small offset references.
+	(struct mips_frame_info): New structure to hold all frame related
+	information, calculated by compute_frame_size.
+	(INITIAL_FRAME_POINTER_OFFSET): New macro, use compute_frame_size to
+	calculate where the frame should go.
+	(ACCUMULATE_OUTGOING_ARGS): New macro, define so stack pushes are
+	folded into the frame.
+	(REG_PARM_STACK_SPACE): Redefine to take an argument and return 16.
+	(OUTGOING_REG_PARM_STACK_SPACE): New macro, define to say we must
+	allocate stack space for arguments passed in registers.
+	(TARGET_FLOAT_FORMAT): New macro, define as IEEE_FLOAT_FORMAT.
+	(FUNCTION_ARG_BOUNDARY): New macro to determine argument padding
+	requirements.
+	(MIPS_STACK_ALIGN): New name for AL_ADJUST_ALIGN macro.
+	(FIX_FRAME_POINTER_ADDRESS): Delete, no longer used.
+	(FUNCTION_PROFILER): No longer have to switch between different
+	register names, override_options now sets up reg_names correctly.
+	(TRAMPOLINE_TEMPLATE): New macro, define as a dummy.
+	(TRAMPOLINE_SIZE): ditto.
+	(INITIALIZE_TRAMPOLINE): ditto.
+	(INDIRECTABLE_ADDRESS): Delete, fold into GO_IF_LEGITIMATE_ADDRESS.
+	(GO_IF_LEGITIMATE_ADDRESS): If -mdebuga, don't allow <label>(<reg>)
+	type addresses, which the machine really doesn't support, but you
+	currently get better code in some instances by pretending it does
+	support it.
+	(LEGITIMATE_CONSTANT_P): Call mips_const_double_ok if CONST_DOUBLE.
+	(ENCODE_SEGMENT_INFO): New macro, set SYMBOL_REF_FLAG (ie, volatil)
+	if refering to an item via the gp pointer.
+	(SLOW_BYTE_ACCESS): Define to 1, it is supposed to generate better
+	code on RISC machines.
+	(classify_op): New macro to classify an insn.
+	(additive_op): Use classify_op to figure out if PLUS or MINUS.
+	(divmod_op): New macro to identify DIV, MOD, UDIV, UMOD insns.
+	(unsigned_op): New macro to identify UDIV, UMOD insns.
+	(REGISTER_NAMES): All names are now pointers into mips_reg_names, so
+	that we don't have to continually test whether -mrnames is used or
+	not.  The override_options function sets this up appropriately.
+	(REGISTER_NUMCHAR): Deleted.
+	(REG_NAME): Deleted.
+	(ADDITIONAL_REGISTER_NAMES): Define both names for the gp registers,
+	so people can use either $r4 or a0 in asm statements.
+	(PRINT_OPERAND): Call print_operand function instead of expanding a
+	huge macro.  Add %C, %N, %(, %), %[, %], %&, %#.
+	(PRINT_OPERAND_PUNCT_VALID_P): Add `(', `)', `[', `]', `&', and `#'.
+	(PRINT_OPERAND_ADDRESS): Call print_operand_address function instead
+	of expanding a huge macro.
+	(DBX_OUTPUT_SEQEND): New macro, emit .set reorder after filling
+	delay slot(s).
+	(ASM_OUTPUT_SOURCE_FILENAME): Add check for doing .file of same file
+	-- this is needed for the prologue to do a .file before all prologue
+	instructions, rather than after the instructions which set up the
+	stack.  Also, warn about #line requests that cannot be honored in
+	MIPS ECOFF binaries.
+	(ASM_OUTPUT_CASE_END): Delete, since it was only used to go back to
+	the text section, and GCC does this now automatically.
+	(READONLY_DATA_SECTION): New macro, define to be rdata_section.
+	(SELECT_SECTION): Don't force volatile readonly items into .data.
+	(ASM_COMMENT_START): New macro, define to be '\t\t# ' for -dp.
+	(SEPARATE_AUX_OUTPUT): New macro, define this to separately compile
+	out-mips.c.
+
+Tue Apr 16 15:00:51 1991  Jim Wilson  (wilson at cygnus.com)
+
+	* unroll.c (final_giv_value): Use expand_binop instead of
+	gen_sub2_insn when emitting subtract insns, since expand_binop
+	will work for any operands.
+
+	* sched.c (schedule_insns): Don't split no-op moves; doing so
+	breaks the code that handles REG_NO_CONFLICT blocks.
+	(update_links): Delete the code that prints a warning for
+	REG_EQUAL notes where the original dest can't be found.  This no
+	longer occurs because of the above change.
+
+	* sched.c: Generalize memory aliasing code so that it will work on
+	non-RISC machines.  Instead of saving just the insn on the pending
+	lists, now saves both the insn and the mem rtx.  Old variables
+	pending_read and pending_write replaced with pending_read_insns,
+	pending_read_mems, pending_write_insns, and pending_write_mems.
+	(read_dependence, true_dependence, anti_dependence,
+	output_dependence): Now passed a MEM rtx instead of a PATtern.
+	(add_insn_mem_dependence): New function.  Adds an insn and a mem
+	to a pending list pair.
+	(sched_analyze_1, sched_analyze_2, sched_analyze): Modified to use
+	new pending list scheme.
+	(schedule_block): Likewise.
+	(schedule_insns): Likewise.
+
+Tue Apr 16 12:31:07 1991  Jeffrey A. Law  (law at mole.gnu.ai.mit.edu)
+
+	* Makefile.in (install-man): Look for protoize.1 and unprotoize.1
+	in the current directory, not $(srcdir)
+	(install-headers): Use basename to strip off $(srcdir) from 
+	include files when installing and changing mode.
+
+Tue Apr 16 08:10:38 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* rs6000.md (extendqixi2): Add CLOBBER to the first SET as well as
+	the second.
+	(load_multiple): Fix typo in operand number and add newline.
+
+	* reload.c (find_reloads_address_1): Pass actual location of a
+	MEM used in an address; also handle the case when the MEM was
+	copied.  Ensure we reload the copy, not the original address.
+
+	* reload1.c (eliminate_regs, case {INSN,EXPR}_LIST): Correctly handle
+	the cases when one or more operations is (nil).
+
+	* local-alloc.c (block_alloc): Check for REG_EQUAL on list insn
+	of REG_NO_CLOBBER sequence, not first.
+	(no_conflict_p): Set LAST and use INSN instead of P for loop start.
+
+Mon Apr 15 12:55:12 1991  Jim Wilson  (wilson at cygnus.com)
+
+	* loop.c (strength_reduce): Don't emit an insn after loop_end to
+	set the final value of a reversed biv.  There is already an insn
+	there setting the biv's proper final value.
+
+Sun Apr 14 18:32:05 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* gnulib1.c (various functions): Added declaration of INTIFY to
+	every function which has a FLOAT_ARG_TYPE argument or return value.
+
+Sun Apr 14 18:31:59 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* c-decl.c (store_parm_decls): Traditional float parm becomes double.
+
+Sat Apr 13 17:35:07 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* m68k.md (storing 32-bit field with movl): Allow any immediate arg 3.
+
+	* expmed.c (store_bit_field): For fields bigger than a word:
+	Avoid special use of SImode, and don't crash if VALUE is CONST_INT.
+
+Fri Apr 12 02:04:46 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* reload.c (find_reloads): Like prev change here, for optional reloads.
+
+	* tm-sparc.h (FUNCTION_BLOCK_PROFILER): Must set %o0 to the address
+	LPBX0 by adding in the low part of the address before calling
+	___bb_init_func.
+
+	* tm-next.h (ASM_OUTPUT_CONSTRUCTOR, ASM_OUTPUT_DESTRUCTOR):
+	New macros.  Place reference to constructor or destructor into
+	constructor or destructor section.
+
+	* tm-next.h (EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS):  Add
+	new constructor and destructor sections.
+
+	* jump.c (squeeze_block_notes,squeeze_notes): Chage the name of
+	squeeze_block_notes to squeeze_notes.  Also handle LOOP_BEG, LOOP_CONT
+	and LOOP_END notes, since these must remain in their original order.
+
+	* cccp.c (skip_to_end_of_comment): Handle warn_comment.
+
+	* m68k.md (dbra patterns): Use `=' in constraint of op 0.
+
+	* gcc.c (process_command): Handle -save-temps.
+	(do_spec_1): Handle %g like %b if -save-temps.
+	(verbose_flag): Renamed from `vflag'.
+
+	* tm-sparc.h (FIXUNS_TRUNC_LIKE_FIX_TRUNC): Don't define this.
+
+Fri Apr 12 00:57:48 1991  Jim Wilson  (wilson at cygnus.com)
+
+	* sched.c: Update all comments to reflect source changes.
+	Make old_live_regs a static global, instead of local to schedule_block.
+	Schedule_block is now void, since its return value was always 1.
+	Rename last_function_call_not_const to last_pending_memory flush.
+	This can not be a CALL_INSN or a INSN that writes memory.
+	New variable pending_lists_length so that the lists can be flushed
+	when they get too long.
+	Use GET_RTX_CLASS instead of multiple GET_CODE calls whenever it
+	makes sense.
+	(read_dependence): New Function.  Returns one if two reads are
+	dependent.  This can happen if both are volatile reads.
+	(true_dependence, anti_dependence, output_dependence): Two volatile
+	memory access are always dependent.
+	(order_calls): Function deleted.  It was very short, it was only called
+	once, and it no longer did what its name implied.  Its one call was
+	replaced with the body of the function.
+	(sched_analyze_1): Correctly handle stripping of SUBREGs, etc from
+	the set dest.
+	If the pending lists are longer than 32 when processing a memory
+	write, then make this write depend on all previous and all future
+	memory accesses so we can flush the pending list.  This is necessary
+	because the algorithms used are O(N*N).
+	(sched_analyze_2): For memory reads, check whether it is read
+	dependent on any previous memory read (this can happen if both reads
+	are volatile).
+	(sched_analyze_insn): Replace call to order_calls with the body of
+	that function.
+	(sched_analyze): Don't clear last_memory_pending_flush for a non-const
+	call, since any future call must still depend on all previous memory
+	accesses.
+	(sched_note_set): Correct handling of SUBREGs, etc.  For partial sets
+	of a register, must treat this exactly the same way as flow.c, i.e.
+	a partial set of a register does not kill the register.  Delete
+	ifdefed out code which is obsolete.
+	(attach_deaths): New argument SET_P, which indicates whether this is
+	a set (if true) or a use (if false) of the rtx X.  Correct handling
+	of REG_DEAD notes, to account for the new REG_UNUSED note.
+	(attach_deaths_insn): Pass new additional parameter to attach_deaths.
+	Always call attach_deaths for sets within a parallel.  Call
+	attach_deaths for clobbers.
+	(new_sometimes_live): Ifdef out code which should never be executed,
+	and replaced with call to abort.
+	(schedule_block): Now void.
+	When processing block to find dead_regs, don't unlink REG_UNUSED notes,
+	but must mark the indicated register as dead.
+	(update_links): Completely rewritten to make more general.  Now handles
+	all REG_NOTEs except REG_INC and REG_LABEL.  No longer makes simple
+	assumptions about the form of instructions.  New argument orig_insn,
+	which is the original unsplit insn.
+	(schedule_insns): Delete unused volatilep code.  Pass new parameter
+	to update_links.
+
+Thu Apr 11 15:34:44 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* out-m88k.c (pic_addressing_base_rtx): Use pic_offset_table_rtx
+	instead.  Otherwise, PIC fails miserably for inline functions.
+	(legitimize_address): Support -mbig-pic.
+	(print_operand): Add `g' for printing #got_rel (for -mbig-pic).
+	* tm-m88k.h (CONDITIONAL_REGISTER_USAGE): PIC_OFFSET_TABLE_REGNUM
+	is used and is fixed for PIC.
+	(GO_IF_LEGITIMATE_ADDRESS): Distinguish the -mbig-pic case.
+	* m88k.md (SImode hi16/lo16): Use %g for -mbig-pic.
+
+Wed Apr 10 21:53:32 1991  Jim Wilson  (wilson at cygnus.com)
+
+	* unroll.c: Change global variable declarations to static.
+	Four new global variables loop_iteration_var, loop_initial_value,
+	loop_increment, and loop_final_value, used for communication between
+	loop_iterations and precondition_loop_p.
+	(unroll_loop): Before deleteing the insns in the original loop body,
+	emit a label after the last insn to be deleted, to ensure that no
+	delete_insn call will delete past that point.
+	(precondition_loop_p): Use global loop_* variables setup by
+	loop_iterations, instead of trying to calculate their values again.
+	(copy_loop_body): Don't emit copies of the start_label.
+	(approx_final_value): COMPARISON argument now passed as the pair
+	COMPARISON_CODE and COMPARISON_VALUE.
+	(find_splittable_regs): When completely unrolling a loop, and the
+	initial value of a biv is a hard register or itself, then must
+	create a new register to hold its initial value for splitting.
+	(loop_iterations): Set the new global variables loop_*.
+	If the comparison value is an invariant register, then search the insns
+	before the loop to try to find a constant value for the register.
+
+Wed Apr 10 16:02:16 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* out-m88k.c (pic_addressing_base_rtx): A pseudo register coined
+	for each function as needed in legitimize_address.
+	(emit_move_sequence): Use legitimize_address instead of generating
+	HIGH/LO_SUM.
+	(legitimize_address): Rework, based on the sparc version, to
+	implement PIC.
+	(output_call): Use the #plt form when doing PIC.
+	(m88k_layout_frame): The addressing base register is no longer
+	fixed and r1 need not be saved for PIC.
+	(output_prologue): Output instructions to setup the addressing
+	base register if one is needed.
+	(print_operand_address): Support the PIC case.
+	* m88k.md (most patterns using hi16/lo16): Disable these for PIC.
+	* tm-m88k.h (CONDITIONAL_REGISTER_USAGE): No longer needed.
+	(ADDRESSING_BASE_REGNUM): Derived from pic_addressing_base_rtx.
+	(GO_IF_LEGITIMATE_ADDRESS): Accept the PIC case.
+	(LEGITIMIZE_ADDRESS): Use legitimize_address instead of HIGH/LO_SUM.
+
+	* make-m88k, make-m88kdgux: Use SysV INSTALL = cp and for DG/UX,
+	use the bison -l option to allow debugging in c-parse.tab.c.
+
+	* From kenner@vlsi1.ultra.nyu.edu.
+	* out-m88k.c: Include insn-config.h before conditions.h, which
+	requires it.
+	* xm-m88kdgux.h: Define SEPARATE_AUX_OUTPUT before including config.h.
+	* tm-m88k.h: Declare MD functions only if SEPARATE_AUX_OUTPUT.
+
+	* tm-m88k.h, tm-m88kdgux.h, tm-m88ksvr4.h: Rework TARGET_VERSION.
+
+Wed Apr 10 08:19:02 1991  Richard Stallman  (rms at apple-gunkies)
+
+	* caller-save.c (emit_mult_restore): Typo testing offset[regno] sign.
+
+	* fold-const.c (target_isinf): Test real value for infinitude.
+	* real.h (REAL_VALUE_ISINF): Use target_isinf.
+
+	* configure: Change / to -- in value of `target' in Makefile.
+
+Tue Apr  9 20:09:49 1991  James Van Artsdalen  (james at bigtex.cactus.org)
+
+	* configure: Modify assignment to `target' in Makefile.
+	(AIX target): Use correct config files.
+	
+	* make-aix386: New file.
+
+Tue Apr  9 19:28:16 1991  Torbjorn Granlund  (tege at zevs.sics.se)
+
+	* longlong.h (header):
+	Modify definition of count_leading_zeros for input = 0.
+	* (68020): Test for __NeXT__ too.
+	* (68020 __umulsidi3, umul_ppmm, udiv_qrnnd):
+	Use constraints "dmi", not "g" (avoid address registers).
+	* (88000 add_ssaaa, sub_ddmmss): Use r modifier for output
+	templates, use J, not I, as constraint for the carry-in insns
+	* (at the end of the file): If UDIV_NEEDS_NORMALIZATION is not
+	defined, define it as 0.
+
+Tue Apr  9 19:14:34 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* function.c (optimize_bit_field): Fix typo.
+
+	* cccp.c (do_define): Don't crash when a builtin macro is
+	redefined.
+
+Tue Apr  9 15:11:42 1991  Richard Stallman  (rms at apple-gunkies)
+
+	* expr.c (move_by_pieces): Don't fail to compile if no movqi.
+
+	* emit-rtl.c (get_last_insn_anywhere): Use first nonempty seq.
+
+	* varasm.c (assemble_constructor): Fix typo.
+
+Fri Apr  5 22:15:57 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* rs6000.md (extendqixi): Add CLOBBER to ASHIFTRT insn.
+
+	* combine.c (simplify_shift_const): Shift operand of PLUS using
+	correct mode.
+	Correctly simplify outer_const when done.
+
+	* reload.c (push_reload): Don't de-reference INLOC if it is 0.
+
+	* expr.c (convert_to_mode): Call protect_from_queue.
+
+Fri Apr  5 13:29:55 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* varasm.c (ASM_OUTPUT_CONSTRUCTOR, ASM_OUTPUT_DESTRUCTOR):
+	Accept two arguments.
+
+Fri Apr  5 08:45:18 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* expmed.c (expand_divmod): Convert OP1 to COMPUTE_MODE when we
+	convert OP0.
+
+	* combine.c (subst): Use gen_binary.
+	(simplify_comparison): If we have a ZERO_EXTRACT from a constant
+	with only one bit set, convert into comparison of position with
+	location of bit in constant; this simplifies ((1 << x) & 1) == 0.
+
+	* combine.c (gen_lowpart_for_combine): Copy code for CONST_DOUBLE
+	from gen_lowpart instead of calling it; it will abort for certain
+	floating-point cases, while we will just surround the object with
+	a SUBREG.
+
+Thu Apr  4 22:31:36 1991  Jim Wilson  (wilson at cygnus.com)
+
+	* unroll.c (new file): Implements loop unrolling.  Completely
+	unrolls small constant bounded loops.  Unrolls other constant
+	bounded loops by an amount modulo the number of iterations so that
+	only one exit test is needed.  Preconditions loops whose iteration
+	count can be calculated at run time, so that only one exit test
+	is needed.  Can also unroll any other loop by having multiple
+	copies of the exit tests.  Tries to simplify addresses while
+	unrolling.
+
+	* tree.def: BLOCK trees have 4 fields, not 5.
+
+	* toplev.c: Add new flag -dt to dump RTL after the second cse pass.
+	Define two new flags, flag_unroll_loops and flag_unroll_all_loops,
+	and add code to support their use for loop unrolling.  Print the
+	exec time for the shorten-branch pass in the proper place, i.e.
+	after delayed branch reorganization.
+
+	* stmt.c (find_loop_tree_blocks): New function.  Creates a mapping
+	between BLOCK trees and loops.  This info is needed when doing both
+	loop unrolling and outputting debugger info.
+	(unroll_block_trees): New function.  Makes COPIES copies of the block
+	trees corresponding the loop indicated by LOOP_NUMBER, so that the
+	BLOCK notes inside the loop will still match the BLOCK trees for
+	the loop.
+
+	* rtl.h: Document the new named pattern
+	"decrement_and_branch_until_zero".  Add macros to access new
+	field of inline_header rtx, which holds a pointer to the function's
+	original DECL_INITIAL tree.
+
+	* rtl.def: New entry for inline_header to hold a pointer to the
+	function's original DECL_INITIAL tree.
+
+	* loop.h (new file): Move many declarations from loop.c to the new
+	file loop.h, and change some from static to extern, so that they
+	can be shared with unroll.c.  Also globalize names for variables
+	changed from static to extern.
+
+	* loop.c: Move many declarations from loop.c to the new	file loop.h,
+	and change some from static to extern, so that they can be shared
+	with unroll.c.  Add misc comments to better explain the code.
+	Change name of global arrays loop_start and loop_end to
+	loop_number_loop_starts and loop_number_loop_ends so that they won't
+	be confused with local loop_start and loop_end variables.
+	New variables loop_number_exit_labels, loop_number_first_block,
+	loop_number_last_block, loop_number_block_level, loop_n_iterations.
+	Old_max_reg renamed to max_reg_before_loop.  Max_uid renamed to
+	max_uid_for_loop.  Induct_var renamed to reg_iv_type.
+	Induct_struct renamed to reg_iv_info.  Class_struct renamed to
+	reg_biv_class.  Iv_list renamed to loop_iv_list.
+	Rename (struct induction) field always to always_computable.
+	Rename (struct induction) field family to next_iv.
+	New (struct induction) field not_replaceable.
+	(loop_opt): Add code to allocate some new arrays for unrolling
+	support.  Add call to find_loop_tree_blocks to create the BLOCK tree
+	to loop map needed when unrolling and outputting debugger info.
+	(scan_loop): Fix setting of maybe_never of label/jump.  The old code
+	always failed.
+	(prescan_loop): Delete obsolete code.
+	(find_and_verify_loops): Add code to initialize
+	loop_number_exit_labels.
+	(mark_loop_jump): Add code for keep chain of loop_number_exit_labels
+	for each loop.
+	(invariant_p): LABEL_REFs are not invariant when doing loop unrolling.
+	Remove static from definition, so that it can be called from unroll.c.
+	(strength_reduce): Change name of variable maybe_never to
+	not_every_iteration, to help emphasize that it is not the same
+	as the variable maybe_never in the code motion code.  Modify code
+	that computes its value so that it will be false more often, resulting
+	in better code.
+	(strength_reduce): Added code to call the new loop unrolling
+	functions, e.g. unroll_loop, loop_iterations, etc.
+	(strength_reduce): New code to handle biv's and giv's which must
+	be set to their final_value after the loop exits.
+	(strength_reduce): Reversed giv's and biv's must have their values
+	calculated differently.  Add new field reversed to struct induction,
+	and code to check and use its value.
+	(strength_reduce): Only check value of bl->nonneg for architectures
+	that have a decrement_and_branch_until_zero instruction.
+	(find_mem_givs): New argument loop_start.
+	(record_giv): New argument loop_start.
+	The always_computable field for DEST_ADDR givs is always set true.
+	New code to check for case of spaghetti code, in which case the
+	giv can never be considered replaceable.
+	(check_final_value): New function. For givs which are not otherwise
+	replaceable, try to calculate their final value, and then try
+	to use this to make them replaceable.
+	(update_giv_derive): Skip inner loop if giv is known to be underivable
+	at the beginning.  Must set cant_derive if we pass an insn that
+	modifies the giv's biv, and we can't calculate an adjustment.
+	(emit_iv_add_mult): Remove static definition so that it is callable
+	from unroll.c.
+	(check_dbra_loop): Reversed biv's must be marked as such, so that
+	they can be treated specially in the rest of loop.c.
+	(final_biv_value): Moved to unroll.c, alongside the new function
+	final_giv_value.  Extensively rewritten to work for most common
+	cases.
+	(update_reg_last_use): Verify that insns have a valid luid before
+	trying to use it.  Don't perform any action if no value luid.
+	(get_condition): Correct initial comment.
+	(get_condition_for_loop): Remove static definition so it is callable
+	from unroll.c.
+
+	* integrate.h: Replace `tree' use in definition with
+	`union tree_node *' so that tree.h does not have to be included when
+	this file is included.	
+
+	* integrate.c (initialize_for_inline): Pass additional argument,
+	the DECL_INITIAL (fndecl) tree, to gen_inline_header_rtx.  Update
+	and correct comment.
+	(save_for_inline_copying): Copy the decl tree, so that virtual reg
+	instantiation, and loop unrolling, won't affect the saved tree.
+	(copy_decl_tree): New argument, functionbody, which distinguished
+	between calls from save_for_inline_copying and calls from
+	expand_inline_function.
+	(copy_rtx_and_substitute): Return orig instead of aborting when
+	inline_target is zero so that loop unrolling can use this code.
+
+	* gcc.texinfo: Document the new optimization flags -funroll-loops
+	and -funroll-all-loops, the new dump option -dt, and the new named
+	pattern	"decrement_and_branch_until_zero".
+
+	* flags.h: Define two new flags, flag_unroll_loops and
+	flag_unroll_all_loops.
+
+	* emit-rtl.c (gen_inline_header_rtx): New argument
+	original_decl_initial.  Pass to gen_rtx call.
+
+	* alliant.md, m68k.md: Name the pattern that uses the REG_NONNEG
+	note to "decrement_and_branch_until_zero".
+
+	* Makefile.in: Add source file unroll.c and header file loop.h to
+	the cc1 dependencies.  Add *.cse2 to the list of files deleted by
+	`make clean'.
+
+Thu Apr  4 16:13:37 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* varasm.c (assemble_constructor, assemble_destructor): New functions.
+	They use ASM_OUTPUT_CONSTRUCTOR and ASM_OUTPUT_DESTRUCTOR.
+	* cplus-decl2.c (finish_file): Use them.
+
+	* reload.c (find_reloads): Pass location as outloc for output reload.
+
+	* objc-actions.c (objc_class_id, synth_module_prologue):
+	Initialize new variable to hold identifier for "objc_class".
+
+	* objc-actions.c (objc_comptypes): Allow assigning between types
+	id and Class without warning.
+
+	* c-typeck.c (warn_for_assignment): When there is a type mismatch
+	in the hidden arguments of a message expression, don't print the
+	argument number as 0 or -1.  Instead print the warning as would
+	be done	for an explicit call to objc_msgSend (this should never
+	happen, but just in case).
+
+	* emit-rtl.c (gen_lowpart): Reverse #if for CONST_DOUBLE case.
+
+Thu Apr  4 13:27:02 1991  Michael Meissner  (meissner at osf.org)
+
+	* hard-reg-set.h (SET_HARD_REG_BIT, CLEAR_HARD_REG_BIT,
+	TEST_HARD_REG_BIT): Use unsigned arithmetic to isolate the word and
+	bit number, which produces better optimized code.
+
+Thu Apr  4 07:34:17 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* reorg.c (relax_delay_slots): Avoid adjusting LABEL_NUSES if the
+	insn is a conditional return.
+
+	* reload1.c (reload): If we find that a replacement cannot be
+	done and that replacement now enables a secondary replacement,
+	this may disable a third replacement in some cases.
+	(eliminate_regs, case SET): Don't stop after we find the first
+	match when looking for modified registers.
+
+	* combine.c (previous_num_undos): New var.
+	(try_combine): Set it after each call to subst.
+	When substituting I1 into I2, somtimes make a copy of PATTERN (i2).
+	(gen_rtx_combine): Start at PREVIOUS_NUM_UNDOS.
+
+	* combine.c (can_combine_p): Start check for volatile references
+	after INSN, not at INSN.
+
+	* combine.c (try_combine): When we find a split point, ensure
+	that I2 is a register.  If it is of the wrong mode, change the
+	mode if we can, just like we do with CCmode registers.
+	(find_split_point): Don't split an extraction if it crosses the
+	boundary given by the field (i.e., a byte boundary if QImode).
+	Correct typo: Should generate LSHIFTRT, not LSHIFT.
+	(subst): Correctly test to see if we can change the mode of
+	a register for a MODE_CC comparison.
+	(distribute_notes): If a NOTE references a pseudo-register,
+	ensure it references the latest copy of that register.
+	When scanning for last use, don't stop at CALL_INSNs.
+
+	* combine.c (expand_compound_operation): Don't get confused about
+	(zero_extend (asm_operands ..)) because of the VOIDmode ASM_OPERANDS.
+	(simplify_and_const_int): Ensure we do computations in proper mode.
+	Simplify ZERO_EXTRACT and ZERO_EXTEND when we have a PLUS.
+	(significant_bits): Don't call get_last_value on a SUBREG, just REG.
+	Correct significant bits for comparison operations.
+	(simplify_shift_const): When VAROP is logical, use proper mode when
+	computing shifted constant.
+
+	* combine.c (gen_lowpart_for_combine): Call gen_lowpart if we have
+	a CONST_DOUBLE.
+
+	* genconfig.c (walk_insn_part, main): Write a definition
+	for HAVE_lo_sum if a LO_SUM is present in the machine description.
+
+	* combine.c (try_combine): If we have a PARALLEL of a SIGN_EXTEND
+	and a load of memory, split it into a load and SUBREG assignment.
+	(find_split_point): If we have LO_SUM for this machine,
+	split (mem (symbol_ref ..)) using HIGH and LO_SUM.
+	If we have operation with second operand constant, maybe we couldn't
+	fit the constant in the insn, so try to split there.
+	Move NOT to first operand so we'll try to split the other operand
+	first.
+	(subst): No reason to avoid making paradoxical SUBREGs and we miss
+	some optimizations if we don't.
+	Convert (lo_sum (high FOO) FOO) to FOO.
+	Convert (C1 + (x + C2) to (C1 - C2) - x.
+	Use distributive law in more places with logical operations.
+	(apply_distributive_law): Properly distribute IOR over XOR.
+	(simplify_shift_const): Simplify (ashift (plus ..) ...).
+	(simplify_comparison): Add code to remove extraneous AND
+	operations when comparing result of two comparisons on some machines.
+	Ignore bits not applicable in our mode.
+	Treat some SUBREGs as ZERO_EXTENDs.
+	Convert equality comparison of AND with sign bit into LT or GE
+	comparison.
+	
+	* combine.c (gen_binary, gen_unary): New functions.
+	(apply_distributive_law, simplify_shift_const): Use gen_binary.
+
+Wed Apr  3 16:15:17 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* Makefile.in (gnulib): Insert only .o files in combined archive.
+	(gnulib1.portable): Use $(HPXT).
+	* make-hp9k320g: Define HPXT.
+
+	* From wilson@cygnus.com.
+	* sched.c (schedule_block): Delete previously unused variable last_q.
+	Correct handling of registers with multiple lifetimes within a single
+	block, always save lifetime info, and clear the appropriate bit in
+	old_live_regs.  Delete now unused variable sched_reg_n_sets.
+
+Wed Apr  3 07:43:35 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* tm-romp.h (CONST_COSTS): All CONST_INTs are cost 0.  Symbolic
+	values cost two insns.
+
+	* function.c (fixup_var_refs_1): Correctly perform position
+	computation for bit extracts; disallow mode-dependent addresses.
+	(optimize_bit_field): Likewise.
+	Remove explicit mention of HImode and QImode by calling mode_for_size.
+	No need to check for offsettable_address_p; we call change_address
+	and are not called after reload; don't call adj_offsettable_operand.
+	* recog.c (validate_replace_rtx_1): Correct endian computation
+	and don't change mode of a MEM with a mode-dependent address.
+
+	* expmed.c (expand_divmod): Try to figure out what mode will be used
+	and convert to that once at the beginning, rather than repeatedly,
+	since we may be writing jumps.
+
+	* vax.md ({zero,sign}_extract patterns): Field width is QImode, not
+	SImode.
+
+Tue Apr  2 08:42:23 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* cse.c (simplify_ternary_operation): Add argument for previous
+	mode of operand 0.
+	Don't do anything for extractions if bits don't fit in OP0_MODE.
+	Use OP0_mode instead of mode of OP0 for endian correction.
+	(fold_rtx): Pass new operand to simpllify_ternary operation.
+	* integrate.c (subst_constants): Add extra arg to call to
+	simplify_ternary_operation and call for rtx class 'b'.
+	* combine.c (find_split_point): Don't split an extract when the
+	bits are outside the mode of operand 0.
+	(subst): Pass new parameter to simplify_ternary operation and call
+	for rtx class 'b'.
+	(subst, case ZERO_EXTRACT): Don't change the mode of a MEM
+	if it is a mode-dependent address.
+	Correctly do endian adjustments so they are correct for fields that
+	go outside a byte boundary.
+	(subst, case {ZERO,SIGN}_EXTRACT): Don't adjust MEM here for non-dest
+	objects; already done in make_compound_operation.
+	(make_compound_operation): Rework code that makes extracts and
+	extends to correcty compute positions, taking into account the fact
+	that field can cross byte boundaries.  Remove redundant adjustments.
+	Use mode_dependent_address_p to validate changing modes of MEM.
+	(simplify_shift_const): Check for mode-dependent address when
+	changing mode of a MEM.
+	(gen_lowpart_for_combine): Likewise.
+
+	* expmed.c (expand_shift): Code to use extzv for logical right shift
+	had numerous assumptions about specific modes and did not validate
+	operands properly.
+
+	* expr.c (expand_expr, case NOP_EXPR): If no target was specified,
+	use convert_to_mode instead of convert_move; this may return a SUBREG.
+
+	* expr.c (do_jump): Conversion isn't NOP if it narrows the object.
+	If testing A & CONST and the result fits in a smaller mode, try
+	the compare there.
+
+	* cse.c (simplify_binary_operation): If eliminating reference to
+	operand, verify	that it has no side effects.
+	Add cases for "a | (~a)" and "a & (~a)".
+
+	* recog.c (register_operand): Only call general_operand for
+	(subreg (mem ...) X), not all SUBREGs.
+
+	* jump.c (jump_optimize): Remove needless incrementing of LABEL_NUSES
+	which can cause a dead label not to go away.
+
+Mon Apr  1 19:08:40 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* cse.c (cse_insn): Add missing call to insert_regs.
+
+Mon Apr  1 18:21:33 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* optabs.c (init_optabs): Change #if to #ifdef.
+
+	* loop.c (check_dbra_loop): Take out Feb 24 change.
+
+Sun Mar 31 22:43:39 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* final.c (insn_counter): New variable.
+	(final_scan_insn): Increment it.
+	(output_asm_insn): Use it for %=.
+
+Sun Mar 31 22:16:31 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* out-a29k.c (output_prolog): Correctly write stack size in tag word.
+
+	* out-a29k.c (srcb_operand): If QImode, any constant is OK since
+	we only care about 8 bits.
+	(print_operand): Add %Q for QImode srcb values.
+	* a29k.md (QImode patterns): srcb's that accept constants should have
+	'n' constraint, not 'I'; use %Q to output.
+
+	* reload1.c (gen_input_reload): Properly generate reload when we are
+	adding a pseudo and a hard register.
+
+	* cse.c (simplify_unary_operation): Don't use ffs.
+
+Sun Mar 31 20:59:52 1991  Micheal Tiemann  (tiemann at pogo.gnu.ai.mit.edu)
+
+	* gnulib1.c (perform_ash{l,r}si3): Fix typo that had these
+	performaces swapped.
+
+Sun Mar 31 13:35:50 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* rtl.h (FIND_REG_INC_NOTE): New macro.
+	* rtl.h (AUTO_INC_DEC): Define here.
+	* flow.c (AUTO_INC_DEC): Not here.
+	* combine.c (can_combine_p, try_combine): Use FIND_REG_INC_NOTE.
+	Make other scans for REG_INC notes conditional on AUTO_INC_DEC.
+	* final.c (final_scan_insn): Use FIND_REG_INC_NOTE.
+	* jump.c (delete_jump): Likewise.
+	* loop.c (get_condition): Likewise.
+	* reload.c (find_reloads_address_1, find_equiv_reg): Likewise.
+	* reload1.c (reload_as_needed): Likewise.
+	* reorg.c (delete_scheduled_jump, mark_set_resources): Likewise.
+	* global-alloc.c (global_conflicts): Likewise.
+
+	* dbxout.c (dbxout_type): For integers, reals, and arrays,
+	use actual type number of int or char, in case those are not 1 and 2.
+
+	* toplev.c (compile_file): Take out last change (regarding lang_init).
+
+	* emit-rtl.c (sequence_element_free_list): Change data type.
+	(get_last_insn_anywhyere, add_insn_after): Finish last change.
+
+	* expr.c (expand_builtin): Finish last change.
+
+Sat Mar 30 15:16:16 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* function.h (struct sequence_stack): New data type.
+	(sequence_stack): Declare variable.  Use new data type.
+	* emit-rtl.c (get_last_insn_anywhere, add_insn_after): Adapt to that.
+	(start_sequence, end_sequence, in_sequence): Likewise.
+	(start_sequence): Allocate stack links as permanent.
+	(init_emit_once): Init sequence_stack here.
+	(init_emit): Not here.
+	* function.c (push_temp_slots, pop_temp_slots):
+	(expand_function_end): Use in_sequence.
+	(fixup_var_refs): Use new data type.
+	(put_var_into_stack): Don't declare sequence_stack.
+
+	* function.c (expand_function_start):
+	Trace static chain properly past first link.
+
+	* ns32k.md (andcbhi3, andcbqi3): Constraint shouldn't say commutative.
+
+Sat Mar 30 02:06:20 1991 North-Keys (erlkonig at apple-gunkies.gnu.ai.mit.edu)
+
+	* c-decl.c (init_decl_processing): Fix typo `integer_tpe_node'.
+	* dbxout.c (dbxout-symbol): Added char * declaration for `name'.
+	* objc-actions.c (encode_array): Avoid returning a value.
+
+Fri Mar 29 15:59:22 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* c-decl.c (init_decl_processing): Define __builtin_constant_p.
+	* expr.c (expand_builtin): Implement it.
+	* tree.h (enum built_in_function): New alternative.
+
+	* toplev.c (compile_file): Move lang_init call after debugger init.
+
+	* gcc.c (default_compilers): Define __cplusplus for C++ code.
+
+	* c-decl.c (start_function): Use 0 for name of result decl.
+	(value_identifier): Variable deleted.
+
+	* dbxout.c (dbxout_type): Handle LANG_TYPE.
+	(dbxout_symbol): Handle RESULT_DECL.
+	Handle variables with constant values that are not output.
+	Use the mangled name when appropriate.
+	(dbxout_tags): Output equivalent typedef when appropriate.
+	(dbxout_function): Output the DECL_RESULT if it has a name.
+
+	* varasm.c (assemble_variable): Delete calls to set_current_gdbfile.
+
+Thu Mar 28 16:14:13 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* gcc.c (main): Calculate basename_length to exclude last period.
+
+	* optabs.c (expand_binop, expand_unop):
+	When widening, don't keep CONST_INT beyond a single word.
+
+	* tm-vax.h (CHECK_FLOAT_VALUE): Change float max to ...444e+38.
+
+	* Makefile.in (gnulib1, gnulib2.portable):
+	Make test of $$? normally succeed, not normally fail.
+	(gnulib1): Don't use -e in second loop.  Test explicitly instead.
+
+	* dbxout.c (lastfile): New static variable.
+	(dbxout_init): Initialize lastfile.
+	* final.c (lastfile): Deleted.
+	(init_final): Don't set lastfile.
+
+	* final.c (set_current_gdbfile): Function deleted.
+	(output_source_line): Handling of GDB debugging info deleted.
+	(final_start_function, final_end_function): Likewise.
+
+Thu Mar 28 09:58:18 1991  Micheal Tiemann  (tiemann at pogo.gnu.ai.mit.edu)
+
+	* cplus-decl.h (decl_context): Add missing declaration for BITFIELD.
+
+	* tm-sparc.h (CC1_SPEC): Change to handle new interpretation of -O2.
+	(OPTIMIZATION_OPTIONS): Use this macro to control default expensive
+	optimizations.
+	(MODES_TIABLE_P): Use GET_MODE_CLASS to simplify this macro.
+	(FUNCTION_ARG,FUNCTION_ARG_PARTIAL_NREGS): Make sure TYPE is nonzero
+	before we use it.
+	(FUNCTION_BLOCK_PROFILER): Fix a bug in the asm code.
+	(EXTRA_CONSTRAINT): For 'S' constraint, if OP is a register, make
+	sure it's not a pseudo.  Also, change call to `memory_address_p' to
+	`strict _memory_address_p'.  Both of these are for the strict cases.
+	(SLOW_BYTE_ACCESS): Try going with this set 1.
+	* sparc.md: Take advantage of new combiner to handle signed bitfield
+	comparisons and signed sub-word comparisons.
+	Added peepholes for doing subword memory tests and operations.
+
+Thu Mar 28 09:43:30 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* emit-rtl.c (start_sequence, gen_sequence): Ensure we allocate rtl
+	on saveable_obstack since we will be saving it and we may be called
+	from an optimizer that will reuse allocated memory in current_obstack.
+
+Wed Mar 27 18:46:27 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* toplev.c (main): Print version with -version, regardless of
+	-quiet.
+
+	* Makefile.in (gnulib, gnulib2.ready): Put `-' before `if'.
+
+	* make-hp9k320, make-hp9k320g (CC, OLDCC): Delete -lsetjmp.
+	Add -Wc,-Nw2000.
+
+	* dbxout.c (dbxout_source_file): New name for fn moved from final.c.
+	* final.c (output_source_file): Moved to dbxout.c.  Callers changed.
+	(output_source_line): Call dbxout_source_file.
+
+Wed Mar 27 11:09:13 1991  Micheal Tiemann  (tiemann at pogo.gnu.ai.mit.edu)
+
+	* version.c: Bumped to version 1.92.
+
+	* final.c (output_source_{file,line}): Fix bug in new handling of
+	"Ltext".
+
+	* cplus-cvt.c (build_up_reference): Handle BIND_EXPR.
+
+	* Makefile.in (cplus-lex.o): depend on cplus-input.c.
+	* cplus-input.c: New file.
+
+	* cplus-method.c (do_inline_function_hair): Call a different
+	`prepare_inline', and don't deal with pending_inlines here.
+	* cplus-lex.c (do_pending_inlines): Deal with pending_inlines
+	here...
+	(reinit_parse_for_method): ...and here.
+
+	* cplus-decl.c (grok_ctor_properties): Use TYPE_NAME_STRING where
+	appropriate.  Also, don't assume that CURRENT_CLASS_TYPE is what we
+	use for error message; use CTYPE instead.
+
+	* cplus-type2.c (digest_init): Strip NON_LVALUE_EXPRs.
+
+	* cplus-tree.c (__eprintf): Added this function from gnulib2 until
+	gnulib configuration is worked out.
+
+	* cplus-parse.y (member_init): Call do_member_init.  Previous code
+	was wrong (using a goto to factor common code) because the parse
+	stack was different in the two contexts.
+	* cplus-init.c (do_member_init): New function.
+
+	* cplus-typeck.c (build_compound_expr): Convert arrays to pointers.
+	(build_c_cast): Warn about possible alignment problems.
+
+Wed Mar 27 05:55:32 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* reload.c (find_reloads): Disallow a PLUS as an operand even if
+	"g" is in the constraint; this is only valid for "p".
+
+Tue Mar 26 06:46:48 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* local-alloc.c (block_alloc): Have insn numbers start at 1, not 2.
+
+	* rtlanal.c (replace_regs): Move to here; add new parameter.
+	* loop.c (replace_regs): Delete from here.
+	(move_movables, strength_reduce): Pass new parameter to replace_regs.
+	* jump.c (duplicate_loop_exit_test): Make new pseudos for pseudos
+	used only in loop exit test; this prevents unnecessay sharing
+	between code inside and outside of loop.
+	* toplev.c (rest_of_compilation): Call reg_scan before jump.
+
+	* combine.c (distribute_notes): If we are searching back for the last
+	use of a register I3 and I2 no longer use and the last use is a SET
+	of that register, place a REG_UNUSED note instead of a REG_DEAD note.
+	No longer need handle REG_DEAD note for output of I3; it will now be
+	a REG_UNUSED note.
+
+	* combine.c (try_combine): If I3SRC is a register and I2 is a
+	multi-output insn, see if we can replace one of the outputs with
+	I3DEST.  If so, move LOG_LINKS pointing at the other outputs to
+	now point to I3 instead of I2.
+
+	* rtlanal.c (single_set): Return 0 if not an insn.
+	Only ignore SET with unused output if it has no side effects.
+	(side_effects_p): New function.
+	* combine.c (can_combine_p): Only ignore SET with unused output if
+	it has no side effect.
+	Don't extend the life of a hard register.
+	(try_combine): Always give up if I1 or I2 used reg inc'd in I3.
+	(significant_bits): Return mode mask if mode wider than host int.
+	Don't get confused by (zero_extend (const_int ..)) and similar where
+	the inner mode is VOIDmode.
+	Arithmetic operations now always have same modes on operands as
+	on the result.
+
+	* jump.c (jump_optimize): Set this_is_{simple,cond}jump at the start
+	of loop, not in middle, and use consistently.
+	Use can_reverse_comparison_p in case where we make scc insn.
+	Don't use can_reverse_comparison_p when we call invert_jump.
+	Use indirect_jump instead of indirect_exp.
+	Check invert_jump's result before making any other changes; handle
+	failure.
+	Simplify code that looks for and deletes USE insns.
+	(jump_back_p): Call can_reverse_comparison_p only if we have to
+	reverse the comparison.
+	(can_reverse_comparison_p): Accept comparison expression and insn
+	it comes from.
+	Rework to be more general now that we have MODE_CC and tighten
+	up a bit.
+	(invert_jump): Allow invert_exp and redirect_jump to fail.
+	(invert_exp): Only invert jump, don't change target.
+	If can reverse comparison code, try it using validate_change.
+	If that doesn't work, swap the arms of the IF_THEN_ELSE.  If that
+	doesn't work, return 0.
+	(redirect_exp): Now static.
+	* expr.c (do_jump_for_compare): Call invert_jump to invert jump
+	to false label after emitting jump; if this fails, convert to
+	jump around unconditional jump to false label.
+	(do_store_flag): Set to 1 first, then branch, then set to 0.  This
+	avoids inverting branches.
+	* reorg.c (optimize_skip, relax_delay_slots): Always allow invert_jump
+	to fail.
+	* rtlanal.c (single_set): Return 0 if not INSN, CALL_INSN,
+	or JUMP_INSN.
+
+	* reload1.c (eliminate_regs): If any eliminable regs occur in a USE,
+	eliminate them.
+
+Tue Mar 26 00:09:18 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* c-decl.c (implicitly_declare): Always make implicit decl permanent.
+
+Mon Mar 25 16:38:14 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* genextract.c (walk_rtx): Record operand numbers that are seen.
+	(gen_insn): If there are gaps in operand numbers, make code to store
+	something for the operands not used in this pattern.
+	(main): Initialize data structures.
+
+	* c-typeck.c (initializer_constant_valid_p):
+	Always allow length-preserving conversions between integer types. 
+
+	* regclass.c (reg_class_record): Return right away if operand is 0.
+
+	* c-decl.c (duplicate_decls): Warn if declare fcn inline after calls.
+
+	* reload.c (combine_reloads):
+	Test reg_overlap_mentioned_p in both directions.
+
+Mon Mar 25 15:05:29 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* genoutput.c (output_epilogue): Choose a name for an unnamed
+	pattern as an offset from the closest named pattern.  Define
+	`insn_name_ptr' as a pointer to `insn_name' for use by print_rtx.
+	* final.c (output_asm_insn): Use the pattern name chosen by
+	genoutput and output the INSN_UID as well.
+	* rtl.c (insn_name_ptr): Provide an alternate definition to avoid
+	link errors when rtl.o is not linked with insn-output.o.
+	(print_rtx): When printing the INSN_CODE field of an insn, print
+	the name if it is available.
+
+Mon Mar 25 09:39:43 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* regs.h (reg_first_use): Deleted.
+	* rtl.h (REG_UNSET): Deleted.
+	(REG_UNUSED): New note.
+	* combine.c (combine_instructions): Delete loop fixing up
+	reg_first_use.
+	(can_combine_p): Ignore a branch of a PARALLEL if its output is
+	never used.
+	(move_deaths): Don't update reg_first_use.
+	(distribute_notes): Don't handle REG_UNSET; add code for REG_UNUSED.
+	* flow.c (reg_first_use): Deleted.
+	(life_analysis): Restore code that marks vars live at start of function
+	as globals.  These are registers that were never set.
+	(allocate_for_life_analysis): Don't allocate reg_first_use.
+	(propagate_block): Search for cc0-setting insn with prev_nonnote_insn.
+	(mark_set_1): Don't set reg_first_use.
+	If register is never used, make REG_UNUSED note, not REG_DEAD.
+	(mark_used_regs): Don't set reg_first_use.
+	* global-alloc.c (global-conflicts): Dead outputs are now denoted by
+	REG_UNUSED notes, not REG_DEAD.
+	* reload.c (find_dummy_reload): Delete test of REG_UNSET; add test
+	of REG_UNUSED.
+	(find_equiv_reg): Don't re-use an output marked as REG_UNUSED;
+	we want these notes to be accurate; this would rarely win anyway.
+	* reload1.c (emit_reload_insns): Test REG_UNUSED to see if an
+	output won't be used any more.
+	* reorg.c (mark_target_live_regs): Use REG_UNUSED notes to kill	
+	registers dead after an insn.
+	* rtl.c (reg_note_name): Delete REG_UNSET, add REG_UNUSED.
+	* rtlanal.c (single_set): Ignore a SET whose output has a REG_UNUSED
+	note.
+	* sched.c (update_first_use): Deleted.
+	(update_links): No need to call update_first_use.
+
+	* local-alloc.c: Major changes to use REG_UNUSED notes, make
+	handling of only-set registers more consistent, and allow
+	two consecutive CLOBBERs to share a register.  Also, avoid loops
+	over all register each basic block; eliminating these make local-alloc
+	three times faster!
+	Quantity numbers now start at zero.
+	(qty_first_reg, reg_next_in_qty): New variables.
+	(qty_clobber): No longer needed.
+	(reg_qty): -1 if register cannot be allocated by local-alloc.
+	Now undefined for hard registers.
+	(reg_offset): Now char *.
+	(call_seen): Deleted, never used.
+	(regs_live_at): Now two entries per insn.
+	(alloc_qty): Initialize chain of register in quantity.
+	(local_alloc): Remove all per-block loops over registers.
+	Only allocate qty_... vars for max_reg - FIRST_PSEUDO_REGISTER.
+	Initialize reg_qty once per function.
+	Don't initialize qty_... vars that are always set before use.
+	(block_alloc): Delete insn_map, max_uid, and call_used.
+	Insn numbers start at 1 and we have two entries in regs_live_at
+	for each insn.
+	Search for REG_NO_CONFLICT block when we see a CLOBBER insn; this
+	avoids having already seen sets to the output register.
+	Call wipe_dead_reg for anything in a REG_UNUSED note.
+	Delete references to reg_first_use.
+	Don't check for invalid birth and death here.
+	Don't call qsort if we have 0 or 1 quantities.
+	Find all registers for a quantity using reg_next_in_qty chain instead
+	of looping over all pseudos.
+	(combine_regs): Refine tests to agree with new conventions.  
+	Never tie pseudos if SREG already has a quantity assigned.
+	When updating size, use reg_next_in_qty instead of looping over
+	all registers.
+	(reg_is_set): Just call reg_is_born.  Where it is born depends on
+	whether we have a CLOBBER or not.  Birth location is now twice
+	the insn number.
+	(reg_is_born): Handle case when a hard reg is born before the
+	current insn.
+	Show we don't know the death location.
+	(wipe_dead_reg): Parameters are now just register and an in/out flag.
+	Death locations are now twice the insn number.
+	Support hard regs that die immediately after current insn.
+	Don't make REG_UNSET notes.
+	(find_free_reg): Validate BIRTH and DEATH here.
+	We no longer have qty_clobber.
+	(post_mark_life): Eliminate CLOBBER parameter.
+	(no_conflict_p): Now passed CLOBBER at start of block.  Return 0 if
+	can't find death note or if R1 is a hard register.
+
+	* m68k.md (divsi3, udivsi3): Remove patterns.  Using divmodsi4 and
+	udivmodsi4 produces better code.
+	(divmodsi4, udivmodsi4): If remainder isn't needed, use divsl/divul
+	instead of divsll/divull.
+
+	* integrate.c (expand_inline_function): Remove change of March 20th.
+	Instead, expand args in two passes.  First, expand all that go
+	into registers.  Then do those in memory with store_expr.
+
+	* integrate.c (initialize_for_inline): Put the original copy of the
+	address into ARG_VECTOR; the new one will be modified.
+
+	* reload.c (push_reload): Handle paradoxical SUBREGs on an output
+	as well as an input.
+
+	* flow.c (mark_label_ref): Don't blow up when X is 0.
+
+	* combine.c (make_compound_operation): Fix typos; result of 
+	exact_log2 is interesting if >=0.
+
+	* a29k.md (store_multiple): Allow gen_store_multiple{_no,}_bug to fail;
+	we fail if they do.
+
+	* reorg.c (emit_delay_sequence): Record that we deleted a BARRIER
+	and restore it precisely on those occaisions.
+
+Sun Mar 24 21:19:55 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* gcc.c (xmalloc, xrealloc): Change error message.
+	* toplev.c (various): Change error messages.
+
+	* final.c (final_scan_insn): Handle ASM_OUTPUT_LOOP_ALIGN.
+
+	* calls.c (emit_call_1): Pass number of bytes to pop to call_pop.
+	* vax.md (call_pop, call_value_pop): Use that arg.
+
+Sat Mar 23 23:28:59 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* Makefile.in (version): Run awk, not gcc, to get this value.
+
+Sat Mar 23 18:04:23 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* cse.c (simplify_unary_operation): Add missing cases for ABS and FFS.
+
+	* alliant.md: Eliminate unneeded patterns: HImode zero_extract, 
+	(set (cc0 (subreg ...))), (set (cc0) (and ...)),
+	(and (zero_extend ...) ...), shift right of 24 and 16.
+	Use alternatives to select assembler template when possible.
+	Use const_int_operand instead of immediate_operand when
+	possible to avoid explicit test for CONST_INT.
+	Write add-and-branch patterns with PLUS removed, the way combine
+	produces them.
+
+	* rtlanal.c (refers_to_regno_p): If X is a SUBREG of a hard
+	register, treat it as if it were the appropriate register.
+	CLOBBER doesn't refer to anything.
+	
+	* final.c (final_scan_insn): Use prev_nonnote_insn, not PREV_INSN,
+	to find cc0-setting insn from cc0-using insn.
+
+	* global-alloc.c (find_reg): Don't look for other registers to
+	renumber unless we know that we are sharing registers.
+
+	* emit-rtl.c (end_sequence): Fix typo that prevented speedup of
+	Dec 26th from doing anything.
+
+	* toplev.c (do_abort): New function, just calls abort.
+	(main): Set lang_expand_expr to address of do_abort; abort might be
+	a macro that is more than just a function name.
+
+	* cse.c: (qty_... variables): Refined to be undefined for indices
+	less than MAX_REG.  Thus, we need not intialize them at the start
+	of a basic block and can instead inialize a quantity as we create it.
+	(reg_{next,prev}_eqv): These variables will now be defined only when
+	reg_qty[N] != N and hence need not be initialized every block either.
+	(new_basic_block): Need not initialize reg_rtx for new block; the
+	only time we can inherit values from previous blocks is for hard
+	regs and it doesn't matter in that case.
+
+	* c-parse.y (yylex): Avoid use of size_t; it may not be defined.
+	Cast alloca to (char *).
+
+	* out-romp.c (update_cc): cc_status.value[12] can also be a COMPARE,
+	so use reg_overlap_mentioned_p to see if an insn that modifies a
+	register invalidates cc0.
+
+	* reorg.c (link_cc0_insns): If next insn is a SEQUENCE, the insn
+	using cc0 is the first insn in the sequence.
+	(mark_target_live_regs): Don't assume that a REG_DEAD note always
+	refers to a register.
+
+Sat Mar 23 15:35:59 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* reload1.c (reload_reg_free_before_p):
+	An input reload is use before an output or output address reload.
+
+	* genoutput.c (validate_insn_alternatives): New function.
+	Loop over insn's alternatives to find out how many
+	alternatives the insn pattern is to support.  Verify that if
+	any alternatives are specified for a given operand that the
+	number of alternatives match the numer of alternatives for
+	this insn.
+	(gen_{insn,peephole,expand,split}): Call
+	`validate_insn_alternatives' after scanning the insn.  This
+	sets up the value N_ALTERNATIVES for the insn so that
+	`process_template' can check that the number of alternitves
+	given matches the number of asm choices for `@' constructs.
+
+Sat Mar 23 08:09:57 1991  Michael Meissner  (meissner at osf.org)
+
+	* dbxout.c (toplevel, dbxout_init): Instead of always using `Ltext'
+	as the label at the beginning of the text region, properly localize
+	it, so that machines which do not put leading underscores in front
+	of external names do not have a problem if the user uses `Ltext'.
+	(dbxout_init): Call text_section before putting out localized
+	`Ltext', in case ASM_FILE_START put us into a different section.
+
+Fri Mar 22 19:26:23 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* a29k.md (jumpfdec): Simplify pattern to match what combine will
+	produce; remove reversed pattern.
+	* out-a29k.c (gen_reg_operand): Speed up by not calling
+	register_operand; check register number ourself.
+
+	* out-romp.c (update_cc, case CC_COMPARE): Call CC_STATUS_INIT.
+	* romp.md: In pattern that sets cc0 and copies a register to another
+	register, allow the output to be in memory so that we don't get an
+	output reload, which will cause problems.
+
+	* varasm.c (assemble_variable): Ensure DECL_INITIAL is non-zero
+	before we reference it; it might be zero if -fno-common.
+
+Fri Mar 22 16:11:35 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* toplev.c (abort): Don't declare if defined as macro.
+
+Fri Mar 22 11:49:43 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* m88k.md (bxxu): Don't attempt to use bcnd.
+	(umulsi3, ashift/and): Remove these patterns.
+	(dummy): This must be a define_expand.
+	* out-m88k.c (m88k_handle_pragma_token): Handle #pragma weak.
+	* tm-m88k.h, tm-m88kdgux.h, tm-m88ksvr4.h, tm-v88r32.h: Various
+	changes to support SVR4, including support for #pragma weak.
+	(SLOW_BYTE_ACCESS): Better code if this is true.
+
+Thu Mar 21 09:15:47 1991  Tom Wood  (wood at gen-rtx)
+
+	* c-parse.y (MULTIBYTE_CHARS): New macro.
+	(init_lex): Change to the native locale.
+	(yylex): Process wide character literals and wide character string
+	literals using mbtowc and mbstowcs based on MULTIBYTE_CHARS.
+
+Thu Mar 21 15:46:45 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* rtlanal.c (dead_or_set_p): A register is dead if it is assigned
+	via a SUBREG that references the all the words in the register.
+
+	* tm-vax.h (CONST_OK_FOR_LETTER_P): Define `I' to be constant zero.
+	(CONST_DOUBLE_OK_FOR_LETTER_P): Define `G' to be floating zero.
+	(CONST_COSTS): +/- 1 should be very cheap due to decl/inc/aob/sob.
+	(PRINT_OPERAND): Add `P', `N', `H', and `B'.
+	* vax.md: Rework many patterns to avoid C code for output template;
+	use "@" construct whenever possible.
+	Use INSN_DELETED_P.
+	Remove extendsidi2; the supplied pattern does exactly what convert_move
+	will do when the pattern is not present.
+	Use constm1_rtx to check for constant of -1.
+	Add mulsidi3 and related add-multiply pattern for emul insn.
+	Use const_int_operand as predicate instead of checking for CONST_INT.
+	Remove unneeded (set (pc) (if_then_else (ne (and ...) ...) ...))
+	patterns.
+	Merge jlbs and jbs and similarly for jlbc and jbc.
+	Remove unneeded reverse branch patterns for above insns.
+	Rewrite patterns for add-and-branch insns to take into account
+	simplifications done by combine and remove reversed cases.
+	Convert peepholes for optimizing extzv followed or preceeded by andl
+	into patterns for a single insn.
+
+Thu Mar 21 15:46:21 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* toplev.c (abort): Declare it.
+
+Thu Mar 21 08:16:12 1991  Michael Meissner  (meissner at osf.org)
+
+	* va-mips.h (whole file): Replace with the 1.39 version of this
+	file, which was a total rewrite of the 1.37.1 version.  Add
+	primitive support for 2.00.
+
+Wed Mar 20 18:31:42 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* jump.c (duplicate_loop_exit_test): Make copy of contents of
+	register note; if it was a REG_EQUAL note, it might have been an
+	arbitrary expression and sharing it can cause problems in cse.
+
+	* rtl.def (UMULT): Remove unsigned multiply code.
+	* combine.c (subst, significant_bits): Remove code UMULT and
+	support for indicating widening multiply with different modes
+	on the MULT operation vs. its operands.
+	* cse.c	(simplify_binary_operation): Remove support for widening
+	multiply.
+	(rtx_code, exp_equiv_p, simplify_binary_operation, cse_insn): Remove
+	code UMULT.
+	* function.c (instantiate_virtual_regs_1): Likewise.
+	* reload1.c (eliminate_regs): Likewise.
+	* local-alloc.c (block_alloc): Likewise; replace with GET_RTX_CLASS.
+	* loop.c (simplify_giv_expr, expr_benefit): Remove code UMULT
+	and support for widening multiply.
+	* optabs.c (init_optabs): Set code of widening multiply tables
+	to UNKNOWN.
+
+	* a29k.md (mulsidi2, umulsidi2): Rewrite using SIGN_EXTEND and
+	ZERO_EXTEND.  Also fix typo in SUBREG_WORD when splitting.
+	* tm-alliant.h, tm-m68k.h (NOTICE_UPDATE_CC): Remove code UMULT.
+	* alliant.md, m68.md (mulhisi3, umulhisi3): Rewrite using
+	SIGN_EXTEND and ZERO_EXTEND.
+	(divhisi3, udivhisi3, modhisi3, umodhisi3): Rewrite using TRUNCATE.
+	* alliant.md, ns32k.md (umulsi3, umulhi3, umulqi3): Remove unneeded
+	patterns that use UMULT.
+	* ns32k.md (umulsidi3): Rewrite using ZERO_EXTEND.
+
+	* tm-alliant.h (NOTICE_UPDATE_CC): MOD and (trunc (mod ...))
+	clobber CC.
+	* alliant.md (mod*, umod*): No longer need CC_STATUS_INIT.
+
+	* recog.c: Include insn-attr.h.
+	(general_operand): If we have insn scheduling, don't allow paradoxical
+	SUBREGs since they can prevent scheduling memory references; they
+	aren't helpful on RISCs anyway and can cause poor register allocation.
+	* Makefile.in (recog.o): Includes insn-attr.h.
+
+	* cse.c (COST): A register only in NO_REGS isn't a specially-cheap reg.
+	(simplify_unary_operation, case {ZERO,SIGN}_EXTEND): If OP_MODE was
+	given as VOIDmode, use MODE; allow mode size of HOST_BITS_PER_INT.
+	(cse_insn): Don't make SET_SRC equal SET_DEST if doing so will cause
+	two registers to be live containing the same value.
+	(cse_end_of_basic_block): Count SETs in CALL_INSNs and JUMP_INSNs.
+
+Wed Mar 20 15:40:48 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* gcc.c (MD_EXEC_PREFIX, MD_STARTFILE_PREFIX): New macros.
+	(md_exec_prefix, md_startfile_prefix): New variables.
+	(process_command): Put those prefixes on the paths.
+
+	* toplev.c (main): Use abort, not fancy_abort.
+
+	* integrate.c (expand_inline_function): Use emit_block_move
+	to copy BLKmode parm value.  Save size and alignment for this.
+
+	* gnulib2.c (__builtin_saveregs)[MIPS]: Go to text section.
+
+	* final.c (final_scan_insn): Don't go to text after jump-tab label.
+
+Tue Mar 19 21:27:09 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* tm-a29k.h (SETUP_INCOMING_VARARGS): Always write registers to	
+	0(ap), no matter how many named args are present.
+
+	* combine.c (subst): In IF_THEN_ELSE, canonicalize to put the (pc)
+	in the second operand if we can reverse the comparison.
+	(significant_bits): Support TRUNCATE and SIGN_EXTEND.
+
+	* tm-romp.h (CC_UNSIGNED): New flag for cc_status.
+	* out-romp.c (update_cc, case CC_COMPARE): Record the operands of the
+	compare and mark whether the test will be signed or unsigned.
+	(restore_compare_p): New function.
+	* romp.md (conditional branch and return patterns): Use new
+	restore_compare_p to see if we need to tell final to reinclude
+	deleted compare insn.
+
+	* output.h (const_int_operand): Define.
+	* recog.c (const_int_operand): New function.
+	* out-a29k.c, out-romp.c, out-rs6000.c (const_int_operand): Remove from
+	these.
+
+	* tree.c (rtl_in_saveable_obstack): New function.
+	* varasm.c (immed_double_const, immed_real_const_1): Ensure that things
+	that get placed on the chain are always put into saveable_obstack.
+
+Tue Mar 19 17:21:30 1991  Richard Stallman  (rms at mole.gnu.ai.mit.edu)
+
+	* stddef.h (wchar_t): New typedef.
+
+	* out-sparc.c (output_block_move): Handle NO_UNDERSCORES syntax.
+
+	* tm-pbd.h, xm-pbd.h: New files.
+
+	* toplev.c (report_error_function): Don't crash if between functions.
+
+Tue Mar 19 12:58:13 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* sched.c (memrefs_conflict_p): C was being used as offset for X,
+	not for Y.  Flipping + and - in offset uses cleared up this problem.
+	({true,anti,output}_dependence): Add declaration for INSN.
+	(order_calls): Interface changed; now returns void.  All callers
+	changed.
+	(sched_analyze_{1,2}): Make dependence between calls and
+	call-clobbered registers explicit.
+	(sched_analyze): Track last_function_call_not_const.
+	(sched_note_set): New parameter DEATH says whether X is marked for
+	death.  Also, look through SUBREGs and extractions.
+	(rank_for_schedule): Stabilize for qsort.
+	(attach_deaths): We should not end up with more REG_DEAD notes than
+	we started with, so abort if we run out early.
+	(attach_deaths_insn): Handle more complicated cases of registers
+	dying in insns.
+	(unlink_notes): Work from back-to-front instead of front-to-back.
+	(new_sometimes_live): Fix code that looks for an element already in
+	the table.
+	(schedule_block): New variable TAIL_PRIORITY  used to help determine
+	max IPC of scheduled code.  Also, for now we analyze (schedule) all
+	blocks, even ones which won't benfit from scheduling.  This is
+	necessary to keep register live info correct, but has the
+	disadvantage of screwing *all* debug info, not just for the blocks
+	that were scheduled.
+	(update_links): Fix complicated code that was to be a simple
+	head-cons to be a simple head-cons.
+	(schedule_insns): Update REG_LIVE_LENGTH and REG_N_CALLS_CROSSED
+	after scheduling.
+
+	* sparc.md (cmpdf): Define an expand pattern for this.	(Dropped by
+	mistake when converted from old-style to new-style condition codes).
+
+	* out-sparc.c (singlemove_string): Catch case where `sethi' can be
+	used instead of `mov'.
+
+	* gcc.texinfo (Optimize Options): Add documentation about the
+	`-finline' option (actually, the `-fno-inline' option).
+
+	* out-sparc.c (output_block_move): Use `rtx_alloc' instead of
+	`gen_rtx' to cons a CONST_INT whose INTVAL we can change.
+
+	* toplev.c (main): Recognize all -O strings (i.e. -O3, -O69), not
+	just -O and -O2.
+
+Mon Mar 18 22:30:21 1991  Richard Stallman  (rms@mole.ai.mit.edu)
+
+	* expr.c (expand_expr): For TRUTH_ANDIF_EXPR, don't use hard target
+	if not optimizing.
+
+	* combine.c: Fix some comments; reorder the variable declarations.
+
+Mon Mar 18 12:07:03 1991  Matthew Self	(mself@next.com)
+
+	* tm-next.h (WORD_SWITCH_TAKES_ARG):  Return number of args taken.
+
+	* tm-next.h (CPLUSPLUS):  Deleted (obsolete).
+
+	* out-next.c (flag_no_mach_text_sections, handle_pragma):
+	Handle #pragma CC_NO_MACH_TEXT_SECTIONS.
+
+Mon Mar 18 12:12:13 1991  Richard Stallman  (rms at goldman)
+
+	* cplus-pt.c: Renamed from cplus-template.c.
+	* Makefile.in (cplus-pt.o): New target.
+
+	* c-typeck.c (initializer_constant_valid_p):
+	Allow casts that change width only for explicit values.
+	* tree.c (really_constant_p): New function.
+	* expr.c (expand_expr): Handle MINUS_EXPR with EXPAND_SUM.
+
+	* tm-m68k.h (FUNCTION_EXTRA_EPILOGUE): Don't normally define this.
+	* out-m68k.c (use_return_insn): Don't look at FUNCTION_EXTRA_EPILOGUE.
+
+	* out-sparc.c (normal_comp_operator): Replace comparison_code_p.
+
+Sun Mar 17 22:53:25 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* m68k.md: Delete patterns now converted by combine to simpler
+	patterns or otherwise obsolete.	 Specifically:	ZERO_EXTRACT from
+	an HImode object, setting cc0 to SUBREG or AND, umulhi3, umulsi3,
+	AND of a ZERO_EXTRACT, shifts of 24 and 16 from MEM, and patterns with
+	constants as first operand of comparison operator.
+	Remove COMPARE except as a SET_SRC.
+
+	* alliant.md, tahoe.md, rs6000.md: Remove COMPARE except as a SET_SRC.
+
+	* flags.h (flag_combine_regs): Deleted.
+	* toplev.c: Likewise.
+	* tm-a29k.h, tm-romp.h, tm-rs6000.h (OVERRIDE_OPTIONS): No longer
+	turn on flag_combine_regs.
+
+	* tm-romp.h, tm-rs6000.h (SLOW_BYTE_ACCESS): Set to 1.
+
+	* Makefile.in (combine.o): Include insn-codes.h and insn-attr.h.
+
+	* combine.c: Major rework to support many more simplifications in
+	a more regular manner and support combining three insns into two.
+	The most significant changes are the following:
+	(subst): Remove simplifications involving ZERO_EXTRACT, SIGN_EXTRACT,
+	ZERO_EXTEND, SIGN_EXTEND, AND, and shifts.
+	Call new routines below; in the case of comparisons, handle call
+	find_next_use if we need to change the comparison code or the
+	particular MODE_CC mode required.
+	No need to ever change ASHIFT to MULT here.
+	(expand_compound_operation): New function to convert
+	{ZERO,SIGN}_{EXTRACT,EXTEND} into the appropriate pair of shifts.
+	(make_compound_operation): New function to make
+	{ZERO,SIGN}_{EXTRACT,EXTEND} operations from shifts and ANDs.
+	If we are on a machine (like a Vax) that has only arithmetic shifts,
+	convert logical to arithmetic shifts when it doesn't matter 
+	which shift is used (simplify_shift_const canonicalizes to
+	logical shifts).
+	If inside an address, convert ASHIFT to MULT.
+	(significant_bits): New function to determine which bits of
+	a value are known to be zero.
+	(simplify_and_const_int): Use significant_bits.
+	Call expand_compound_operation when required.
+	Handle AND of an ASHIFTRT with a constant.
+	Don't make ZERO_{EXTEND,EXTRACT} here.
+	(simplify_shift_const): New function to simplify a shift of an
+	an object by a constant integer.
+	(gen_lowpart_for_combine): When applied to a comparison operator,
+	return comparison operator in requested mode.
+	(simplify_set_cc0_and): Deleted.
+	(try_combine): No longer call simplify_set_cc0_and.
+	(reversible_comparison_p): New function.
+	(simplify_comparison): New function.
+
+	(combine_instructions): Allocate and initialize new vars
+	reg_last_set_{table_tick,label,invalid}.
+	(update_table_tick, record_value_for_reg): New functions.
+	(get_last_value_validate, get_last_value): New functions.
+	(record_dead_and_set_regs): Call record_value_for_reg.
+
+	(find_split_point): New function to locate a place where a complex
+	pattern can be split into two insns.
+	(try_combine): If we are combining three insns and can't recognize the
+	new pattern, try to split it.
+	Call new functions below to update insn status.
+	Return insn at which to continue scan.
+	(adjacent_insns_p, add_links, remove_links): Deleted.
+	(add_incs, add_no_conflicts, remove_death, move_deaths_2): Deleted.
+	(move_deaths): Generalize to include movements in both directions.
+	Update reg_first_use when we make an earlier use.
+	(distribute_notes, distribute_links): New functions.
+	(combine_instructions): No longer need check for LOG_LINKS
+	pointing at a NOTE.
+	Rescan from location indicated by try_combine, if any, when
+	combining three insns.
+	Update reg_first_use if we moved a use to a later insn.
+
+	(try_distrib): Deleted.
+	(apply_distributive_law): New function, contains code from old
+	try_distrib.
+	(subst): Call apply_distributive_law for applicable operations.
+	Try to apply associative law.
+	(combine_instructions): No longer call try_distrib.
+	(dump_combine_stats, dump_combine_total_stats, combine_instructions):
+	No longer count distributer statistics.
+
+	(can_combine_p): New function to see if I2 or I1 is combinable.
+	Be more precise about when we can combine insns involving cc0.
+	Eliminate -fcombine-regs; always do it.
+	(try_combine): 
+	Call can_combine_p to validate I2 and I1.
+	If -fexpensive-optimizations, try to simplify I1 or I2.
+	Handle (set (foo) (const_int 0)) followed by a STRICT_LOW_PART
+	assignment to FOO as a ZERO_EXTEND.
+	(subst): Quit very early if X is a root node (like PC0).
+	Remove most canonicalizations done in first switch statement; now
+	done elsewhere.
+	Call simplify_{unary,binary,ternary}_operation.
+	Add cases involving logical and arithmetic operations applied
+	to comparison operators or values with only one significant bit.
+	Add more cases involving ABS since comparisons returning values
+	can be done with ABS.
+	Avoid generating (const (const ...) ...).
+	Convert (xmult (x_extend ...) ...) to a widening multiply.
+
+	(gen_rtx_combine): New function to search for an operation in
+	undobuf.  Many callers to gen_rtx changed to call this function.
+	(copy_substitutions): Only copy a substitution if it was placed into
+	more than one location.
+
+Sun Mar 17 17:26:09 1991  Richard Stallman  (rms@mole.ai.mit.edu)
+
+	* c-common.c (shorten_compare): Warn for (unsigned char) == -1.
+
+	* final.c (final_scan_insn): Set debug_insn before first output.
+	(output_asm_insn): Clear it here.
+
+	* expr.c (do_jump): Don't try to split non-integers.
+
+	* fixincludes (dnetdb.h): Fix missing semi in nodeent.
+	(rusers.h): Code to fix this file was duplicated.
+
+	* toplev.c (decl_printable_name): Now given an extra arg.
+	(decl_name): Accept that arg.
+	(announce_function, report_error_function): Pass that arg.
+	(error_with_decl, warning_with_decl): Likewise.
+
+	* dbxout.c (getwd) [USG]: Define as macro.
+
+	* c-decl.c (init_decl_processing): Indicate byte alignment for void.
+
+	* expr.c (do_jump_by_parts_*): Compute nwords from compare arg.
+	Pass 0 as size and alignment to compare_from_rtx.
+	(do_jump_by_parts_greater): Compare high word first.
+	Handle unsigned compares properly.
+	Fix logic for dropping through versus failing.
+
+	* expr.c (expand_builtin): Change cmpstrsi4 to cmpstrsi as in optabs.c.
+
+	* c-common.c (truthvalue_conversion): Handle ptr vs int in MINUS_EXPR.
+
+Sun Mar 17 15:43:48 1991  Matthew Self	(mself@next.com)
+
+	Allow multiple return points in some framless functions (2/2/91):
+
+	* m68k.md (return):  New insn pattern for rts (and rtd).
+
+	* tm-m68k.h (FUNCTION_PROLOGUE, FUNCTION_EPILOGUE,
+	USE_RETURN_INSN):	Call new functions to avoid giant macros
+	which are hard to edit.
+
+	* out-m68k.c (output_function_prologue,
+	output_function_epilogue):  New functions.
+
+	* out-m68k.c (use_return_insn):	 New function.	Determines
+	whether the epilogue will consist of a single insn.  Some
+	code was duplicated from output_function_epilogue.  There
+	should be probably a new layout routine to do this common
+	work.  Also #include "flags.h".
+
+	*out-m68k.c (output_function_epilogue):	 Don't output
+	anything if the epilogue was output as RTL.  We detect this
+	by the barrier insn which is always placed after a return
+	insn.  This machine-independent test should probably be moved
+	back into final.c and removed from out-sparc.c and out-m88k.c.
+
+	* out-next.c:  Don't #include "flags.h".
+
+Sun Mar 17 00:07:20 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* genemit.c (gen_exp): Support constm1_rtx.
+	* genrecog.c (add_to_sequence): Likewise.
+
+Sat Mar 16 17:26:58 1991  Richard Stallman  (rms@mole.ai.mit.edu)
+
+	* c-lang.c (maybe_building_objc_message_expr): New dummy function.
+	* c-typeck.c (warn_for_assignment): Use it.
+
+	* toplev.c (compile_file): Write out all static consts that are used.
+
+Sat Mar 16 14:08:12 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* integrate.c (subst_constants): Don't replace registers in USE or
+	CLOBBER expressions.
+
+	* genattrtab.c (main): Properly set up a default DEFINE_ASM_ATTRIBUTES.
+
+	* cse.c (cse_insn): Correctly check for a hash table element equal to
+	the destination of a SET.
+
+Fri Mar 15 16:55:32 1991  Ron Guilmette (rfg at pepper.ncd.com)
+
+	* Makefile.in (OBJS): Added dwarfout.o to list of things to be
+	built.
+
+	* Makefile.in (dwarfout.o): Added this rule.
+
+	* dwarfout.c (FT_*_long_long): Added default definitions for all of
+	these extended fundamental type codes to cater to plain vanilla
+	<dwarf.h> file which do not define codes for these fundamental types.
+
+	* dwarfout.c (TREE_UID): Added a local definition of this macro
+	because gcc v2 no longer provides a definition for it and because
+	dwarfout.c needs some way of getting a unique numeric code for each
+	type.
+
+	* dwarfout.c (CLASSTYPE_*): Added some local default definitions
+	for these macros in order to get around the fact that they are
+	currently defined only in cplus-tree.h (and rms wants dwarfout.c
+	to be language independent).
+
+	* dwarfout.c (BITFIELD_OFFSET_*): Added some local macros to help
+	compute various quantities relating to bitfield offsets.
+
+	* dwarfout.c (location_attribute): Changed code which outputs location
+	attributes for bitfield so that it uses gcc2 macros.
+
+	* dwarfout.c (byte_size_attribute): Changed code which outputs the
+	byte_size attribute so that it no longer uses the obsolete
+	DECL_SIZE_UNIT macro (from gcc1).
+
+	* dwarfout.c:  Replaced all uses of the obsolete macro TREE_PACKED
+	to uses of the new gcc2 macro DECL_BIT_FIELD.
+
+	* dwarfout.c (deriv_list_attribute): Fixed typo "decl" => "type".
+
+	* dwarfout.c (output_dies_for_type): Replaced bogus reference to the
+	non-existant routine "output_member_function_type_die" with a proper
+	reference to the routine "output_subroutine_type_die".
+
+	* dwarfout.c (output_symbols_for_block): Fixed calling error which
+	was introduced by rms.
+
+	* dwarfout.c: Replaced all uses of the obsolete macro STMT_SUBBLOCKS
+	with uses of the new gcc2 macro BLOCK_SUBBLOCKS.
+
+	* dwarfout.c (output_symbol): Removed reference to TAG_DECL.  The
+	use of TAG_DECLs was an early idea which didn't work out.
+
+	* dwarfout.c: (dwarfout_init): Changed name from dwarfout_initialize
+	because rms failed to do so when he changed the name in the call.
+
+Fri Mar 15 17:22:14 1991  Richard Stallman  (rms@mole.ai.mit.edu)
+
+	* c-decl.c (pushdecl): Add `%s' to some error messages.
+
+	* sparc.md: Add extra assembler alternative in last change.
+
+	* cse.c (simplify_unary_operation, simplify_binary_operation):
+	Remove error checks that rejected SFmode.
+
+	* expr.c (get_pointer_alignment): Don't lose on casts from integer
+	to pointer.
+
+Fri Mar 15 07:57:19 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* c-decl.c (pushdecl): Fix typo in previous change.
+
+	* cse.c (simplify_{unary,binary}_operation): Fix usage of
+	REAL_VALUE_FROM_CONST_DOUBLE in recent change.
+
+Thu Mar 14 18:56:53 1991  Richard Stallman  (rms@mole.ai.mit.edu)
+
+	* c-decl.c (pushdecl): Warn if mismatch with implicit decl.
+
+	* final.c (final_start_function): Handle NON_SAVING_SETJMP.
+	Include hard-reg-set.h.
+	* function.c (setjmp_protect, setjmp_protect_args): Likewise.
+	(expand_function_end): Call those if NON_SAVING_SETJMP.
+
+Thu Mar 14 14:40:45 1991  James Wilson	(wilson at cygnus.com)
+
+	* reload1.c (order_regs_for_reload): When REG_ALLOC_ORDER is defined,
+	use that definition only to order regs, do not try to put call
+	used regs first.  This eliminates the benefits of defining the macro
+	in the first place.
+
+	* real.h: New macros for real arithmetic, REAL_VALUE_FIX_TRUNCATE,
+	REAL_VALUE_UNSIGNED_FIX_TRUNCATE, REAL_VALUE_FIX,
+	REAL_VALUE_UNSIGNED_FIX.
+
+	* cse.c (simplify_unary_operation): Added code to simplify floating
+	point rtx.  Now simplifies UNSIGNED_FLOAT, ABS, FLOAT_TRUNCATE,
+	FLOAT_EXTEND, FIX, and UNSIGNED_FIX.  Add aborts to default case
+	of switches.
+	(simplify_binary_operation): Added code to simplify floating point
+	rtx.  Now simplifies PLUS, MINUS, MULT, and DIV.  Add aborts to
+	default case of switches.
+	(*): Always use REAL_VALUE_TYPE and REAL_VALUE_FROM_CONST_DOUBLE
+	when extracting a floating point number from a CONST_DOUBLE.
+
+Thu Mar 14 14:40:45 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* expr.c (get_pointer_alignment): Update ALIGN for NOP_EXPR.
+
+	* c-decl.c (builtin_function): New arg LIBRARY_NAME.
+	(initialize_decl_processing): Pass that argument.
+
+	* c-decl.c (grokdeclarator): Handle C_TYPE_FIELDS_VOLATILE.
+	(finish_struct): Likewise.
+	* c-tree.h (C_TYPE_FIELDS_VOLATILE): Define it.
+
+	* Makefile.in (gnulib1, gnulib2.portable): Test $$? after compilation.
+
+	* c-typeck.c (check_format): Discard multiple NOP_EXPR levels.
+
+	* objc-actions.c (build_message_expr, build_selector_expr,
+	build_encode_expr, get_class_ivars, start_class):  Finding
+	Objective-C code in c source files is now a fatal error.
+	(They should recompile with -lang-objc.)
+
+	* objc-actions.c (gen_method_decl):  Don't crash for syntax
+	error in method declaration: -bar: x, y
+	(encode_array):	 Treat an undimensioned array the same as a pointer.
+
+Thu Mar 14 07:39:30 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* reorg.c (try_merge_delay_insns): Previous fix had effect of 
+	disabling this function.  Rework to take into account things
+	needed, instead of set.	 This is still somewhat of a kludge.
+
+	* recog.c (apply_change_group): An insn consisting of just a USE
+	or CLOBBER is always valid, but recog_memoized returns a -1 for it.
+
+	* genattrtab.c: Count all definitions as well as counting insns; use
+	definition # in error message.
+	Most functions that accepted insn_code now accept insn_index as well
+	and similarly for structures containing insn_code.
+
+	* reorg.c (try_merge_delay_insns): If not an annulling branch, take 
+	into account things set in the delay slot.  This prevents merging
+	two increments into one.
+
+	* reorg.c (dbr_schedule): Fix typo in printing statistics.
+
+Thu Mar 14 02:11:56 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* genemit.c, genoutput.c, genrecog.c: Count all definitions
+	as well as counting insns; use # of definition in error messages.
+
+	* toplev.c (pipe_closed, float_signal): Give it an explicit arg.
+	* cplus-decl.c (sigsegv): Likewise.
+	* cccp.c (pipe_closed): Likewise.
+
+	* cccp.c: Delete trigraph from comment.
+
+	* Makefile.in (realclean): Delete objc parser files.
+
+	* assert.h (__assert for __GNUC__): Don't return value of abort.
+
+Wed Mar 13 16:12:54 1991  Richard Stallman  (rms at churchy.ai.mit.edu)
+
+	* expr.c (do_jump_by_parts_greater): Don't lose if labels are 0.
+
+	* cplus-edsel.c: New name for cplus-cadillac.c.
+	* Makefile.in (cplus-edsel.o): Fix the compilation rule.
+
+Wed Mar 13 06:47:53 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* reorg.c (mark_set_resources): Any registers mentioned in REG_INC
+	notes are set by an INSN.
+
+	* flags.h (flag_expensive_optimizations): Add new flag.
+	* toplev.c: Support -fexpensive-optimizations and turn on for -O2.
+	* stmt.c (preserve_subexpressions_p): Use flag_expensive_optimizations
+	instead of testing for -O2 explicitly.
+
+	* expr.h (operand_subword): Add missing declaration.
+
+	* reload1.c (eliminate_regs): Handle INSN_LIST (found in REG_NOTES).
+
+	* tm-i386.h (RETURN_POPS_ARGS): Don't call aggregate_type_p with 
+	IDENTIFIER_NODE.
+
+Wed Mar 13 00:00:29 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* optabs.c (expand_binop, expand_unop): If wordwise, make target non0.
+
+Tue Mar 12 15:24:09 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* fixincludes: Quote the # in an echo.
+	* fixincludes: Fix typos handling size_t and ptrdiff_t.
+	* fixincludes (sys/file.h): Fix incorrect conditional in Ultrix.
+
+	* c-typeck.c (initializer_constant_valid_p): Allow NON_LVALUE_EXPR.
+	Return a tree that indicates the relocation.
+	All callers changed.
+
+	* jump.c (jump_optimize): Rerecognize jump insn after inverting it.
+
+	* expr.c (do_jump):
+	Use can_compare_p on the operand mode, not the comparison's mode.
+
+	* reload.c (subst_reloads): Fix dumb error in last change.
+
+	* expr.c (do_jump_by_parts_equality*): Fix logic errors.
+
+Mon Mar 11 14:27:40 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* reload.c (subst_reloads): Don't make subregs, just new regs.
+
+	* expr.c (do_jump_by_parts_equality, do_jump_by_parts_greater):
+	(do_jump_for_compare, do_jump_by_parts_equality_rtx): New functions.
+	(do_jump): Use them to handle wide values.
+	* optabs.c (can_compare_p): New function.
+
+	* reload1.c (emit_reload_insns): Don't make subreg around RELOADREG;
+	just make a new REG.
+
+	* cse.c, varasm.c: Fix typos.
+
+	* sparc.md (move SI to reg_or_nonsymb_mem_operand):
+	Separate third alternative into two alternatives.
+	* tm-sparc.h (PREFERRED_RELOAD_CLASS): Return CLASS as given.
+
+	* optabs.c (operand_subword): Fix typo.
+
+	* longlong.h (__umulsidi3): Return .ll field.
+
+Mon Mar 11 11:43:21 1991  Jeffrey A. Law  (law at mole.ai.mit.edu)
+
+	* make-hp9k2bsd: New file.
+	* configure (hp9k200-bsd): Use it.
+
+Mon Mar 11 07:08:12 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* cplus-lex.c (check_newline): Clear TREE_INT_CST_HIGH once instead
+	of clearing TREE_INT_CST_LOW twice.
+
+Mon Mar 11 06:51:52 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* flow.c (mark_used_regs): If we are going to use a later
+	register to auto-increment, make sure it really is a REG.
+	In the case above, count any calls crossed by the new register.
+
+	* global-alloc.c (global_conflicts): Mark registers modified by
+	virtue of a REG_INC note as modified in the insn to make conflicts.
+	(mark_reg_store): Accept SETTER value of 0.
+
+Sun Mar 10 16:56:25 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* optabs.c (operand_subword): New function to get one word of operand.
+	(expand_binop, expand_unop): Use it for word at a time case.
+
+	* configure (a29-bsd*): Renamed from a29-sysv*.
+
+	* expr.c (emit_library_call): Handle GNULIB_NEEDS_DOUBLE.
+	* tm-i860.h (GNULIB_NEEDS_DOUBLE): Define it.
+
+	* tm-harris.h (ASM_FILE_START): Output a .file.
+
+	* reload1.c (constraint_accepts_reg_p): Understand reg classes.
+
+Sun Mar 10 06:58:20 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* expr.c (move_by_pieces, move_by_pieces_ninsns, emit_push_insn):
+	If SLOW_UNALIGNED_ACCESS is defined, respect alignment even if
+	STRICT_ALIGNMENT is not defined.
+	* tm-a29k.h (SLOW_UNALIGNED_ACCESS): Define this.
+
+Sun Mar 10 02:57:40 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* cccp.c (handle_directive): If pass_thru and -C, print the
+	input before removing comments from it.
+
+Sat Mar	 9 21:18:48 1991  Torbjorn Granlund  (tege at musta.nada.kth.se)
+
+	* gnulib2.c (div_qrnnd, __umulsidi3, lowpart, highpart, B): Move
+	to longlong.h.
+	(udiv_qrnnd): New name of div_qrnnd.  Rewrite to work correctly.
+	(file header): Remove obsolete comment about internal format.
+	(bits): Remove this function.  count_leading_zeros in longlong.h
+	is similar.
+	(__udivdi3): Use count_leading_zeros instead of bits.
+	(__udivdi3): Use umul_ppmm instead of __umulsidi3, as this makes
+	better code.
+
+Sat Mar	 9 18:02:47 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* jump.c (jump_optimize): Avoid looking at PATTERN of NOTE
+	or CODE_LABEL.
+
+	* reload1.c (reg_is_output_reload, count_for_*groups): Use
+	HARD_REG_SET instead of array to avoid bzero calls.
+	(reload_reg_used*): Likewise.
+
+	* emit-rtl.c (gen_rtx, init_emit_once): Pre-compute CONST_INTs
+	from -64 to 64 to save space.
+
+Sat Mar	 9 14:28:37 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* reload1.c (choose_reload_regs): Fix typo in last change.
+
+Sat Mar	 9 01:03:01 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* cplus-decl.c (pushtag): Don't call `pushdecl' for nested type if
+	the type is already defined.
+
+Fri Mar	 8 17:24:20 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* ns32k.md, vax.md (right shift patterns): When generating a right
+	shift, use xSHIFTRT but use (neg x) as the shift count to
+	more accurately represent what is supported by the machine.
+
+	* expmed.c (emit_store_flag): Can't narrow result of scc insn before
+	normalizing.
+
+Fri Mar	 8 12:56:41 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* cplus-class.c (pushclass): Set CURRENT_FUNCTION_DECL to
+	appropriate value so that pushtag does the right thing for tags
+	pushed into scope.
+
+Fri Mar	 8 02:47:53 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* gcc.c (delete_temp_files): Delete only ordinary files.
+
+	* tree.c, cplus-tree.c (TYPE_HASH): 777777 was supposed to be octal.
+
+	* reload1.c (choose_reload_regs): Properly ensure EQUIV
+	is free and of the desired class.
+	When a reload may be a group, mark all its regs in use.
+
+	* reload.c (push_reload): Don't call reg_overlap_mentioned_p
+	unless IN is a REG or MEM.
+
+	* c-common.c, cplus-search.c, cplus-class.c (NULL):
+	Undef before defining.
+
+	* sdbout.c (sdbout_one_type): Don't temporarily clear KNOWN_TYPE_TAG.
+
+Thu Mar	 7 10:53:32 1991  Tom Wood  (wood at dg-rtp.dg.com
+
+	* toplev.c (main): Add -dp: annotate the assembly with a comment
+	describing the pattern and alternative used.  Also, make -dm work
+	for USG systems.
+	* genoutput.c (output_epilogue): Output the array `insn_name'.
+	* final.c (debug_insn, final_scan_insn): Record the value of the
+	last insn processed by final_scan_insn.
+	(output_asm_insn): Annotate the assembly output.
+	(ASM_COMMENT_START): Provide a default value.
+	* tm-att386.h, tm-bsd386.h, tm-sun386.h (ASM_COMMENT_START):
+	Specify "/".
+
+Thu Mar	 7 06:15:04 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* cplus-class.c (propagate_basetype_offsets): Check ASSOC_TYPE in
+	addition to return value from assoc value before aborting.   ???
+	should figure out why assocs are not shared.
+
+Wed Mar	 6 16:29:37 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* c-decl.c (NULL): Undef before defining.
+
+	* cccp.c (do_include): Allocate file name permanently.
+
+Wed Mar	 6 09:06:39 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* m88k.md (and/ashift): Added for the new combine.c (ashift/and
+	works with the previous version).
+	(bcnd insns): Use bcnd to test for sign and zero.
+	(muldf3, divdf3): Use new method to deal with a power of two.
+	(andsi3, iorsi3, xorsi3): Split into two insns for some constants.
+	(call, call_value): Deal properly with a CONST_INT address.
+	* out-m88k.c (call_address_operand): Don't allow CONST_INT.
+	(uses_arg_area_p): New function for -moptimize-arg-area.
+	* tm-m88k.h (TARGET_SWITCHES): Delete -mpic in favor of -fpic.
+	Add -moptimize-arg-area and -mno-optimize-arg-area.
+
+Wed Mar	 6 00:07:09 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* real.h (REAL_VALUE_FROM_CONST_DOUBLE): Takes input and output args.
+	* integrate.c (copy_for_inline, copy_rtx_and_substitute):
+	(restore_constants): Calls changed.
+
+Tue Mar	 5 23:06:36 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* stmt.c (fixup_gotos): Handle jumping to end of rtl.
+
+	* c-decl.c (store_parm_decls): If -traditional,
+	allow unsigned int in prototype in place of int.
+
+	* cplus-cadillac.c: Delete all but the stubs.
+
+Tue Mar	 5 16:59:18 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* jump.c (jump_optimize): Handle case of only NOTE insns after
+	NOTE_INSN_LOOP_BEG.
+	(duplicate_loop_exit_test): Return 0 when we hit a block
+	start or end, rather than quitting loop and getting confused.
+
+	* integrate.c (subst_constants): Correctly move constants to
+	second operand of commutative operations.
+
+	* jump.c (comparison_code_p): Deleted.
+	* combine.c (subst): Use GET_RTX_CLASS instead of comparison_code_p.
+	* cse.c (find_comparison_args): Likewise.
+	* recog.c (comparison_operator): Likewise.
+	* loop.c (get_condition): Likewise.
+
+Tue Mar	 5 14:21:57 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* cse.c (fold_rtx): When checking for constant pool addresses,
+	handle addresses constructed from LO_SUM.
+
+	* recog.c (constrain_operands): If before reload, `m' and `o'
+	accept all that could be reloaded to fit those constraints.
+
+	* reload1.c (gen_input_reload): Return the first insn emitted by
+	this function, instead of the last insn emitted.
+
+	* stmt.c (expand_end_loop): When move exit test to loop bottom,
+	also move a preceeding NOTE_INSN_LOOP_CONT note if it exists.
+
+	* gcc.c (process_command): Check for running out of args after option.
+
+	* out-mips.c, out-romp.c: Test BYTES_BIG_ENDIAN with #if.
+	* tm-i860.h (*_BIG_ENDIAN): Define as 0.
+	* tm-mips-news.h (BYTES_BIG_ENDIAN, WORDS_BIG_ENDIAN): Deleted.
+	(DECSTATION): Deleted.
+
+	* tm-mips.h: Test WORDS_BIG_ENDIAN with #if.
+
+	* tm-mips.h, tm-sparc.h, tm-spur.h (CONST_DOUBLE_OK_FOR_LETTER_P):
+	Use CONST_DOUBLE_LOW and CONST_DOUBLE_HIGH.
+
+	* real.h: dconst0, dconst1, dconstm1 are declared twice.
+	Eliminate the second redundant declaration.
+
+	* cse.c (FIXED_REGNO_P): Exclude OVERLAPPING_REGNO_P registers.
+
+	* cccp.c (path_include): Handle empty names in path.
+
+	* final.c: Use gvarargs.h, not varargs.h
+
+	* configure (i860, i860-bsd): Handle +gas.
+	* tm-i860g.h, tm-i860bsdg.h: New files.
+
+Mon Mar	 4 22:41:36 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* cse.c (simplify_unary_operation): When making a real const, use MODE.
+
+Mon Mar	 4 21:35:47 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* cse.c (cse_end_of_basic_block): Correctly handle case where
+	we find a "new" branch to follow.
+	(cse_end_of_basic_block, cse_main, cse_basic_block): PATH_SIZE
+	is now actual size, not size - 1.
+
+Mon Mar	 4 06:44:27 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* cplus-decl.c (poplevel): Change test for whether to clobber the
+	DECL_CONTEXT of local variables.  Now we won't clobber context for
+	any nested types.
+
+Mon Mar	 4 00:39:11 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* jump.c (jump_optimize): When deleting x=y after y=x,
+	don't delete more than one death note, and don't delete any
+	unless we really do delete x=y.
+
+	* cccp.c (main): Support -lang-objc++.
+	Eliminate compilation parameter CPLUSPLUS.
+
+	* cccp.c (main): Handle leading or trailing space in `predefs'.
+
+	* fixincludes: Fix typos handling size_t and ptrdiff_t.
+
+Sun Mar	 3 16:41:24 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* cccp.c (main): Handle multiple spaces, and tabs, in `predefs'.
+	* gcc.c (do_spec_1):  Allow extra whitespace in CPP_PREDEFINES.
+	Also transform -Dfoo=bar into -D__foo__=bar correctly.
+
+	* varasm.c (assemble_zeros): Use ASM_BYTE if defined.
+
+	* reload1.c (reload): Only special-case a spill reg alone in a class
+	if there is non-group need for that class.  Be careful not to count
+	a reg in the usual place if it was counted in the special case.
+
+	* reload1.c (order_regs_for_reload): Make fixed regs and
+	eliminable regs twice as bad as explicitly mentioned regs.
+
+	* reload1.c (choose_reload_regs): Fix typos in last change.
+
+	* c-decl.c (init_decl_processing):
+	Return type of memcpy varies if -traditional.
+	(ptr_ftype_ptr_cptr_sizet): Global var deleted.
+
+	* reload1.c (emit_reload_insns): When updating reg_reloaded_contents,
+	first always clear, then maybe store nonzero value.
+
+Sun Mar	 3 16:12:17 1991  Ken Raeburn  (raeburn at watch.com)
+
+	* cplus-template.c (mangle_class_name_for_template): Add two
+	leading underscores, to avoid conflicts with programmer's names.
+
+	* cplus-tree.h (struct lang_identifier): New field `template'
+	points to template info from which this identifier was
+	constructed.
+
+	* cplus-template.c (current_template_expansion,
+	current_template_name): Variables deleted.
+
+	* cplus-template.c (lookup_template_class): Top half of old
+	instantiate_template; returns the id_node.
+	(instantiate_template): Takes the id_node as argument now.
+	* cplus-parse.y (template rules): Use separate rule for checking
+	whether expansion is required.	For base classes, always try it;
+	else do it only if `{' is not next token.
+	(template_type_name): New nonterminal for template class name
+	without expansion.
+	(template_type): Includes expansion, if needed.
+
+	* cplus-input.c (input_from_saved_text): Deleted.
+	* cplus-template.c (instantiate_template): Call feed_input directly.
+
+	* cplus-parse.y (base_class_visibility_list): Now type <itype>,
+	cast to tree in base_class action.
+
+Sun Mar	 3 07:46:55 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* expr.c (do_store_flag): Consider A & single-bit as cheap.
+
+	* fold-const.c (operand_equal_p): If ARG0 and ARG1 are the same
+	SAVE_EXPR, they are equal.
+
+	* function.c (fixup_var_refs_1): Move mispositioned code in
+	(set (zero_extract ...) ...) case; fix incorrect indentation.
+
+Sun Mar	 3 01:11:46 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* cccp.c (include_defaults, cplusplus_include_defaults):
+	Use STANDARD_INCLUDE_DIR.
+	(STANDARD_INCLUDE_DIR): Define by default as /use/include.
+	* tm-mips.h (STANDARD_INCLUDE_DIR): Define, if MIPS_BSD43.
+	(CPP_SPEC): Don't do -I to handle -ZSYSV, -ZBSD43.
+
+Sat Mar	 2 17:20:57 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* expr.c (expand_expr, case COND_EXPR): Remove unneeded calls to
+	safe_from_p in A ? A : FOO cases.
+
+Sat Mar	 2 16:14:24 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* reload1.c (choose_reload_regs): Support subreg as reload_override_in.
+	Likewise reload_reg_rtx.  Just don't use REGNO on them.
+	(emit_reload_insns): Handle subreg as OLDEQUIV.
+
+	* reload1.c (delete_output_reload): Pass the output reload insn,
+	not a spill reg index.	Call in emit_reload_insns changed.
+	(emit_reload_insns): Don't actually update spill_reg_store
+	till after all reload insns have been made.
+
+	* reload.c (push_reload): If existing reload has a reload reg,
+	make sure it fits the class of this reload.
+
+	* stmt.c (fixup_gotos): Fix typo in last change.
+
+	* reload1.c (choose_reload_regs): Don't use equiv reg
+	that is clobbered in this insn.
+
+Sat Mar	 2 12:19:19 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* cplus-dem.c (optable): Add op for `operator,'.
+
+	* toplev.c (main): Clear WARN_INLINE if FLAG_NO_INLINE is nonzero.
+
+	* cplus-typeck.c (c_expand_return): Perform conversion to reference
+	in time that we can warn about the return of more non-lvalues.
+	Also, fix what appeared to be bugs in the code dealing with
+	WHATS_RETURNED.
+
+Sat Mar	 2 00:11:18 1991  Ken Raeburn  (raeburn at watch.com)
+
+	* cplus-parse.y (base_class): Base class may be a template class.
+	Split off non-visibility portion into base_class.1.
+
+	* cplus-parse.y: Replaced PUBLIC, PRIVATE, PROTECTED with a single
+	terminal VISSPEC, with <itype> value, to simplify parser slightly.
+	* cplus-parse.h (enum rid): Added values for VISSPEC terminal.
+	* cplus-lex.c (is_reserved_word): Changed token types to VISSPEC,
+	rid values as appropriate.
+	(yylex): For VISSPEC, set itype value rather than ttype.
+
+Fri Mar	 1 21:50:23 1991  Ken Raeburn  (raeburn at watch.com)
+
+	* cplus-parse.y (.set_base_init): Discarded `preserve' code, which
+	was doing nothing.
+
+Fri Mar	 1 19:01:25 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* reorg.c (redundant_insn_p): Rename second arg to TARGET.
+	Handle the case where TARGET is a SEQUENCE.
+	(mark_target_live_regs): Don't get confused by registers conditionally
+	set in a JUMP_INSN when looking for regs set before used.
+
+Thu Feb 28 17:25:59 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* loop.c (check_dbra_loop): Replace code that thinks it knows
+	exactly what the RTL looks like (and gets it wrong) with call
+	to get_condition_for_loop.
+
+Thu Feb 28 16:35:21 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* c-typeck.c (build_compound_expr): Convert array to pointer.
+
+Wed Feb 27 15:46:54 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* gnulib1.c (FLOAT_ARG_TYPE, FLOATIFY): New macros.
+	(__*sf*): Use them for `float' args.
+
+	* stmt.c (expand_end_case):
+	Test value of HAVE_casesi and HAVE_tablejump at runtime.
+
+	* stmt.c (fixup_gotos): Check that jump into bindings
+	really comes from before the start of the bindings.
+	Use TREE_REGDECL to indicate error message printed.
+
+Wed Feb 27 15:01:51 1991  Ken Raeburn  (raeburn at watch.com)
+
+	* cplus-template.c (end_template_decl): Store correct name in new
+	decl.  Use pushdecl, not pushtag.
+	(instantiate_template): Use identifier's global value, not its
+	type.  Pass back both template and new class in token value.
+	* cplus-lex.c (identifier_type): Templates now have type
+	TEMPLATE_DECL, not TYPE_DECL wrapped around a TEMPLATE_DECL.
+
+Wed Feb 27 06:27:45 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* loop.c (replace_regs): Don't make nested SUBREGs.
+
+	* reload.c (push_reload): SUBREG_LOC applies only to INLOC, not OUTLOC.
+
+	* cse.c (simplify_binary_operation): Simplify A&A, A|A, and A^A.
+
+	* reload.c (find_reloads_address_1): Correctly handle (post_inc (mem)).
+
+Tue Feb 26 21:49:15 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* expmed.c (store_bit_field, extract_bit_field):  Calls to
+	get_best_mode were passing alignment in bytes rather than
+	alignment in bits.
+
+	* flags.h (flag_pedantic_errors): Declare it.
+
+	* c-tree.h (C_TYPEDEF_EXPLICITLY_SIGNED): New flag.
+	* c-decl.c (grokdeclarator): Record that flag in new typedefs.
+	Check it when determining signedness of bitfields.
+
+	* expr.c (expand_expr): In A ? A : B, make output safe from A and B.
+
+	* reload.c (find_reloads_address, find_reloads_address_1):
+	Reload any reg that appears in a clobber in the same insn.
+	(regno_clobbered_p): New function.
+
+Tue Feb 26 21:41:43 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* expr.c (expand_expr): Add missing arg to exapnd_exit_loop in
+	EXIT_EXPR case.
+
+Tue Feb 26 14:35:47 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* c-decl.c (grokdeclarator): Check pedantic error last.
+
+	* tm-i386.h (STRUCT_VALUE, STRUCT_VALUE_INCOMING): Value is 0.
+	(RETURN_POPS_ARGS): Pop the structure return pointer here.
+	* out-i386.c (function_epilogue):
+	current_function_pops_args says how many args to pop.
+
+	* tm-i386.h (CC_Z_IN_NOT_C): New cc flag.
+	* i386.md (je and jne patterns): Handle this flag.
+	(pattern using bt insns): Set the flag.
+	Output test insn instead if bit number is constant.
+	(insv): Changed constraint.
+
+	* tm-i386.h (enum reg_class): Define ABCI_REGS.
+	(REG_CLASS_NAMES, REG_CLASS_CONTENTS): Support ABCI_REGS.
+	Fix the contents for ABC_REGS.
+	(REG_CLASS_FROM_LETTER): Define `x' for ABCI_REGS.
+	* i386.md (divsi3, udivsi3): Use `xm' for operand 2 constraint.
+	(divhi3, udivhi3, divmod*, udivmod*): Likewise.
+
+	* cccp.c (pedwarn): Declare as void.
+
+Tue Feb 26 06:41:34 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* tree.h (IDENTIFIER_VIRTUAL_P): New macro for IDENTIFIER_NODE.
+	Nonzero means that this identifier is used by a function declared
+	virtual.
+	* cplus-decl.c (grokfndecl): Set IDENTIFIER_VIRTUAL_P instead of
+	DECL_VIRTUAL_P.
+	* cplus-search.c (get_first_matching_virtual): Test
+	IDENTIFIER_VIRTUAL_P instead of DECL_VIRTUAL_P.
+
+	* cplus-decl.c (pushtag): Handle classes which are nested in
+	function scope (as opposed to class scope).
+	(lookup_nested_type): Ditto.
+	* cplus-method.c (build_overload_nested_name): Ditto.
+
+	* cplus-decl.c (grokdeclarator): Only globalize non-nested classes
+	declared in class scope (i.e., don't globalize in function scope).
+
+Tue Feb 26 06:11:37 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* a29k.md (storem): Fix typo in operand number.
+
+	* expr.c (do_store_flag): Add missing cast required for some compilers.
+
+	* tm-a29k.h (REG_CLASS_*, REGNO_REG_CLASS): Add new class Q_REGS
+	and constraint letter `q' for the Q register.  Requested by tege.
+
+	* tm-a29k.h (PRINT_OPERAND_ADDRESS): Allow short constant as address.
+
+Mon Feb 25 20:46:43 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* expr.c (expand_expr): In handling A : A ? FOO, use safe_from_p
+	against FOO.  Fix many incorrect operand refs in A : FOO ? A.
+
+	* sdbout.c (plain_type_1): Record type name only if using forward refs.
+
+	* reload.c (find_reloads): Mark those RELOAD_OTHER reloads
+	that are used for output addresses, for choose_reload_regs.
+
+	* integrate.c (copy_rtx_and_substitute):
+	Copy REG_USERVAR_P from original regs to new regs.
+
+	* c-typeck.c (digest_init): Handle STRING_CST before same-type case.
+
+Mon Feb 25 13:31:51 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* cplus-decl.c (grokdeclarator): Handle the identification of
+	constructors declared in nested scope.
+
+Mon Feb 25 06:27:28 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* reorg.c (next_insn_no_annul): New function.
+	(mark_set_resources, mark_target_live_regs): Don't count insns from
+	the target of a branch if the branch is annulling.
+
+	* expmed.c (emit_store_flag): Get new register for target if
+	preserve_subexpressions_p returns nonzero.
+	Convert to desired mode, then normalize, instead of doing it
+	the other way around; this allows better combining.
+
+Sun Feb 24 20:07:02 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* cse.c (find_comparison_args): Fix indentation and misplaced paren.
+
+	* Makefile.in (install-headers): Remove extraneous parens from
+	uses of shelllibsubdir.
+
+Sun Feb 24 15:49:42 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* loop.c (check_dbra_loop): Win if loop biv is used only for counting.
+
+	* cccp.c (struct definition): Record file and line.
+	(create_definition): Store that information.
+	(do_define): Identify location of previous definition.
+	(pedwarn_with_file_and_line): New function.
+
+Sat Feb 23 13:36:13 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* c-decl.c (grokdeclarator): Error for `signed void', etc.
+	Warning for `signed my_int', and only if pedantic.
+
+	* toplev.c (warn_cast_align): New flag, with -W option.
+	* c-typeck.c (build_c_cast): Warn if target alignment increases.
+
+Sat Feb 23 10:22:03 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* cplus-type2.c (store_init_value): Global variables must be
+	specially initialized in PIC under SunOS.
+
+	* cplus-dbxout.c (dbxout_tags): Test that the tag's value has not
+	been cleared before trying to use it as a type.	 This happens when a
+	class starts out looking like a nested class, but turns out to be a
+	reference to an implicitly defined global class.
+
+Sat Feb 23 06:16:44 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* jump.c (true_regnum): If given a pseudo not assigned a hard reg,
+	return the pseudo register number.
+
+	* out-rs6000.c (update_cc): Remove CC_REVERSE and CC_NONNEG.
+	* rs6000.md (define_attr "cc"): Remove reverse.
+	(cmpsi): Only allow second arg to be a constant.
+	Remove some unneeded comparison patterns.
+
+	* rs6000.md (misc logical patterns): Only add CLOBBER for MQ
+	when we really clobber it; we used to do so in more cases to
+	work around a since-fixed restriction in combine.c
+
+	* rs6000.md (extend*): Use DEFINE_EXPAND instead of a pattern
+	that generates two insns.  Remove (sign_extend (ashift ..) ...)
+	and similar patterns; no longer neeed.
+
+	* rs6000.md (fma instruction): Add missing single-precision case.
+
+	* out-rs6000.c (print_operand, case 's' and 'S'): Truncate to low-order
+	5 bits.
+
+	* out-rs6000.c (output_prolog, output_epilog): Correct code to handle
+	large stack frames; used 65535 instead of 32767 and had a typo.
+
+	* tm-romp.h (CC_IN_NOT_TB): Deleted.
+	* out-romp.c (update_cc): No longer need CC_REVERSE, CC_NONNEG, or
+	CC_NOTTBIT.
+	(print_operand): Remove use of CC_IN_NOT_TB.
+	* romp.md (define_attr "cc"): Remove reverse,nonneg, and nottbit.
+	(mttbi): Remove redundant pattern.
+	(cmpsi): First arg can only be register_operand.
+	Remove some unneeded COMPARE patterns.
+	
+	* romp.md (movhi): Use zero-extend, not sign-extend load.
+
+	* out-romp.c: (float_conversion): Allow CONST_INT as operand.
+
+	* out-romp.c (first_reg_to_save): Ensure we save r14 if we use it.
+
+	* a29k.md (divsf3): Fix typo in name; was divds3.
+
+	* tm-a29k.h: Add new -mno-storem-bug and TARGET_NO_STOREM_BUG.
+	(TARGET_SWITCHES): -m29050 turns on -mno-storem-bug.
+	* a29k.md: (store_multiple_bug): New pattern to work around chip bug.
+	(store_multiple_no_bug): New name for original pattern.
+	(store_multiple): Choose depending on TARGET_NO_STOREM_BUG.
+	(storem patterns): Two cases, with and without bug.
+
+	* a29k.md (extend*): Don't define single insn for sign_extend.
+	Instead, use DEFINE_EXPAND.  Delete DEFINE_SPLITs for the old patterns.
+
+	* a29k.md (jumpfdec pattern): Fix typo.
+
+	* tm-a29k.h, tm-romp.h, tm-rs6000.h (CC1_SPEC): Remove optimization
+	selections.
+	(OPTIMIZATION_OPTIONS): Turn off insn scheduling by default until
+	it is fixed.
+
+	* tm-a29k.h, tm-romp.h, tm-rs6000.h (SETUP_INCOMING_VARARGS):
+	Correctly handle the case of the special argument being other than
+	the first arg.
+
+	* tm-a29k.h (GO_IF_LEGITIMATE_ADDRESS): A tiny constant (< 255)
+	is also a valid address.
+
+	* tm-a29k.h, tm-romp.h, tm-rs6000.h (BYTE_LOADS_ZERO_EXTEND): Add to
+	support combine.c in development.
+
+	* jump.c (jump_optimize, can_reverse_comparison_p, delete_jump):
+	Consistently allow NOTEs between the set and use of CC0.
+	* reorg.c (delete_scheduled_jump): Likewise.
+
+	* expmed.c (emit_store_flag): Pass in UNSIGNEDP; can't derive it from
+	comparison code.
+	* expr.c (do_store_flag): Add UNSIGNEDP arg to emit_store_flag call.
+	* jump.c (jump_optimize): Likewise.
+	* optabs.c (expand_binop): Likewise.
+
+	* local-alloc.c (requires_inout_p): New function.
+	(block_alloc): Use high-priority preferences if we have a hard
+	register used in an insn that requires the same register for
+	input as for the output.
+	(combine_regs): Rename argument COPY to MAY_SAVE_COPY.
+
+	* cse.c (simplify_binary_operation, case MULT): Convert multiply
+	by power of two to shift.
+	(cse_insn): Don't share rtx obtained from the hash table; copy it.
+
+Sat Feb 23 00:27:26 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* rtlanal.c (dead_or_set_p): Don't check for REG_INC.
+
+	* reload.c (push_reload): (subreg:m1 (reg:m2 ...) ...) with M1 wider
+	than M2 is also a paradoxical SUBREG.
+
+Fri Feb 22 14:43:44 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* reload1.c (possible_group_p): Add missing forward declaration.
+
+	* reload1.c (eliminate_regs, case PLUS): Ensure we handle the
+	case of (plus reg1 reg2) where REG1 is eliminable and REG2 is
+	psuedo that didn't get a hard reg and has reg_equiv_constant nonzero.
+	(choose_reload_regs): If reload_needed_for_multiple,
+	the reload can't be input-only or output-only.
+	(emit_reload_regs): Avoid regno_dead_p.
+	* combine.c (regno_dead_p): Function deleted.
+
+	* Makefile.in (maketest): Finish renaming config to configure.
+
+	* gcc.c (lookup_compiler): Create a new entry to represent
+	the result of searching for an alias entry.
+
+	* reload.c (combine_reloads): Swap args to reg_overlap_mentioned_p.
+
+Fri Feb 22 09:40:50 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* cplus-parse.y (base_class_list): Re-fix precedence so we can use MI.
+
+	* cplus-except.c (init_exception_processing): Push exception ctors
+	and dtors into scope so they can be inlined.
+
+Fri Feb 22 08:03:47 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* genemit.c (output_init_mov_optab): New function.
+	(main): Have insn-emit.c include insn-codes.h.
+	Call output_init_mov_optab.
+	* optabs.c (gen_move_insn): Handle moving MODE_CC modes; we may have
+	to find a different mode to do this in.
+	(init_optabs): Try to initialize CCmode in mov_optab; if we have
+	EXTRA_CC_MODES, call init_mov_optab.
+	* Makefile.in (insn-emit.o): Now depends on insn-codes.h.
+
+	* rtl.h (get_last_insn_anywhere): Add missing declaration.
+
+	* stmt.c: Now includes hard-reg-set.h (for n_non_fixed_regs).
+	(preserve_subexpressions_p): Renamed from inside_loop.
+	Always return true if optimize >= 2; always return false if
+	optimize == 0.	If optimize == 1, only return true if we aren't
+	very far into a loop instead of whenever we are in any loop.
+	* Makefile.in (stmt.o): Now includes hard-reg-set.h.
+	* expr.c (expand_expr): Use preserve_subexpressions_p instead of
+	inside_loop.
+	Only set TARGET to SUBTARGET if TARGET isn't a pseudo register.
+	(expand_expr, case REAL_CST): Don't call force_reg; now done in
+	expand_binop, if required.
+	* optabs.c (expand_binop, expand_twoval_binop, emit_cmp_insn):
+	If arg is expensive constant and preserve_subexpressions_p is true,
+	force it into a register.
+	* out-sparc.c (emit_move_sequence): Call preserve_subexpressions_p
+	instead of inside_loop.
+
+	* reload1.c (eliminate_regs, case SUBREG): Correct test for paradoxical
+	SUBREG.
+
+	* varasm.c (output_constant_pool): If entry refers to a deleted label,
+	write a zero instead of the undefined label.
+
+Fri Feb 22 02:49:24 1991  Ken Raeburn  (raeburn at watch.com)
+
+	* Reversed all changes dated 20 February.
+	* cplus-template.c (pending_template_expansion): New function;
+	given template name, returns class name of expansion in progress.
+	* cplus-parse.y (PTYPENAME -> typespec): Call it.
+	('~' PTYPENAME -> notype_declarator): Ditto.
+
+Thu Feb 21 15:17:13 1991  Craig Burley	(burley at geech.ai.mit.edu)
+
+	* c-common.c (check_case_value): If value is NULL_TREE, return it
+	without any further checking.
+
+	* stmt.c (pushcase_range): If value1 is NULL_TREE, substitute
+	minimum value for the type, if value2 is NULL_TREE, substitute
+	maximum value for the type, from then on assume both are not NULL_TREE.
+	These changes appear to provide minimal support for case ranges.
+
+	* c-typeck.c (digest_init): For explicit array element initializer
+	case, change check against max value of domain so index may equal it.
+	For array element initialization, give next initializer a chance to
+	override the choice of next index before falling out of loop because
+	next index is out of range.  For structure initialization, give next
+	initializer a similar chance before falling out of loop because no
+	more fields exist.
+
+	* reload1.c (possible_group_p): Needed a forward decl (static).
+
+Thu Feb 21 14:37:01 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* c-decl.c (grokdeclarator):
+	Don't make bitfield type unsigned if comes from typedef.
+
+	* reload1.c (reload): Don't require INITIAL_FRAME_POINTER_OFFSET
+	if cannot eliminate the frame pointer.
+
+	* i860.md (cbranch, inverse_cbranch): Use eq to test cc0.
+	(negated branch patterns): New patterns.
+
+	* tm-i860.h (INITIALIZE_TRAMPOLINE): Use size_int, not build_int.
+
+	* reload1.c (reload): Save and restore notes around find_reloads.
+
+	* tm-sun2os4.h (LINK_SPEC): New macro.
+	* tm-sun386i.h (LINK_SPEC): Undef before redefining.
+
+	* cccp.c (do_include): Check for -2, not -1, as value of lookup_import.
+
+	* c-parse.y (initlist): Fix typo.
+
+Mon Feb 18 02:50:38 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* cplus-decl.c (grokdeclarator): Try to come up with better magic
+	for implicitly globalizing classes implicitly declared in class
+	scope.
+
+Sun Feb 17 09:27:38 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* cplus-tree.c (virtual_offset): New function.	Returns the offset
+	of a baseclass that is virtual or comes from a virtual baseclass, or
+	NULL if there is no such baseclass.
+	* cplus-class.c (modify_vtable_entries): Call this function instead
+	of `virtual_member'.  `virtual_member' can return the wrong thing if
+	we try to use it for an offset computation of a baseclass which is
+	not strictly a virtual baseclass.
+
+Sat Feb 16 06:21:03 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* recog.c (validate_replace_rtx_1): Use correct rtx_code for the
+	new operation when commuting operands.
+	Generalize to commute operands on comparison operation.
+
+Fri Feb 15 23:01:24 1991  Richard Stallman  (rms at geech.ai.mit.edu)
+
+	* c-parse.y (initlist): Finish changing `case N:' to `[N]'.
+
+	* combine.c (try_combine): Update reg_first_use.  Flush useless links.
+
+Thu Feb 14 17:06:44 1991  Ken Raeburn  (raeburn at watch.com)
+
+	* cplus-parse.y (template_parm): New derivation from `class ID',
+	for consistent return of `identifier_node' nodes with `class A :
+	B' case.
+	* cplus-template (end_template_parm_list): Nothing to strip off of
+	identifier_nodes now.
+	(process_template_parm): Strip off one level of tree_list,
+	discarding (for now) the required base class.  Don't need to run
+	through grok* any more.
+
+Sun Feb 10 19:23:21 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* gcc.c (main, process_command, default_compilers): Fix typos.
+
+Sat Feb	 9 15:06:43 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* gcc.c (process_command): Handle separate args for -B, -b, -V.
+
+	* gcc.c (lookup_compiler): New function.  Handles alias entries.
+	(main): Call that.
+	(default_compilers): Make all real suffixes into alias entries.
+	(infiles): Now a vector of structures, containing specified language.
+	(process_command): Handle -x to specify language.
+	(main): Use specified language if any.
+
+Fri Feb	 8 18:31:00 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* fold-const.c (fold): Set TREE_USED when create COMPOUND_EXPR.
+	* stmt.c (warn_if_unused_value): Don't warn if TREE_USED.
+	* c-typeck.c (build_unary_op): Handle multiple casts inside ++.
+
+Fri Feb	 8 07:37:24 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* real.h (dconst2): New variable.
+	* emit-rtl.c (init_emit_once): Initialize dconst2.
+	* tree.c (real_twop): New function.
+	* cse.c (simplify_unary_operation): Fold FLOAT, FLOAT_EXTEND, and
+	FLOAT_TRUNCATE.
+	(simplify_binary_operation): Convert x*2 to x+x.
+	(cse_insn): Handle case where constant equivalent is in table.
+	Fix minor bug with merging src_related_elt.
+	* fold-const.c (fold): If commutative operation, move a constant
+	first operand to the second operand.
+	Remove tests of constants as first operand for commutative operations.
+	Convert x*2 to x+x.
+
+Fri Feb	 8 03:07:34 1991  Ken Raeburn  (raeburn at watch.com)
+
+	* cplus-ptree.c (print_lang_decl): Corrected argument list.  Print
+	address of template info for TEMPLATE_DECL nodes.
+
+	* cplus-decl.c (set_current_level_tags_transparency): New
+	function, for altering tag-transparency of a context.
+
+	* cplus-parse.y (PRE_PARSED_METHOD_DEF): Was unused; now gone.
+	(template_instantiation): Handle $-references correctly.  Generate
+	a class_head-like value for LC actions to operate on.
+	(maybe_base_class_list): New non-terminal: colon and base class
+	list, or empty.
+	(named_class_head): Use it.
+	(unnamed_class_head): Use '{', not LC.
+	(class_head): If template_instantiation found, use its value.
+	(template_arg): Apply groktypename to typename args.
+
+	* cplus-template.c (template_text_obstack): Deleted, just use
+	permanent_obstack instead.
+	(init_template): Deleted; callers changed.
+	(current_template_info): New variable: pointer to last-saved
+	template info record.
+	(end_template_decl): Use DECL_NAME, DECL_ARGUMENTS,
+	DECL_LANG_SPECIFIC, rather than TREE_OPERANDs.	Save most of
+	template info here.
+	(reinit_parse_for_template): Only save text here, in
+	already-allocated template info record.
+	(mangle_class_name_for_template): New function.
+	(instantiate_template): Finally written.
+
+Thu Feb	 7 22:06:56 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* tm-i386v4.h (ASM_OUTPUT_COMMON): Specify rounding in the output.
+	(ASM_OUTPUT_LOCAL): Use .local and .comm.
+
+	* tm-news.h (FUNCTION_PROLOGUE): Correct syntax of link insn.
+	(PRINT_OPERAND_ADDRESS): Use period, not colon, before index reg width.
+
+	* stmt.c (pushcase, pushcase_range):
+	Don't warn for code before first `case' if there is a label on it.
+
+Thu Feb	 7 06:23:10 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* integrate.c (initialize_for_inline): Accept COPY argument.
+	Only copy parameter DECL_RTL if COPY non-zero; in that case,
+	also replace DECL_RTL with copy.  All callers changed.
+	(copy_decl_rtls): New function.
+	(save_for_inline_copying): Use copy_decl_rtls to copy MEM DECL_RTLs
+	in the function.
+	Copy address of pseudos if they are a MEM.
+
+Wed Feb	 6 19:19:25 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* c-typeck.c (build_binary_op_nodefault): No warn for RSHIFT by 0.
+
+Wed Feb	 6 17:37:23 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* function.c (fixup_var_refs_1):  Accept a location in rtx instead
+	of an rtx.
+	Unless -fforce-mem, if an insn is valid with MEM, leave it alone.
+	Rework ZERO_ and SIGN_EXTRACT cases to properly do adjustments
+	and generalize to support other than QImode MEMs.
+	(fixup_var_refs_insns): Change call to fixup_var_refs_1.
+
+Wed Feb	 6 08:14:21 1991  Tom Wood  (wood at dg-rtp.dg.com)
+
+	* m88k.md (cmp): Use reg_or_0_operand to avoid swapped compares.
+	(call patterns): Put use of r1 in a parallel construct.
+	(multiply and divide by a power of two): Now just multiply.  The
+	new combiner will change divide by a power of two into multiply.
+	(movhi, movqi): Use zero-extend load.
+	* tm-m88k.h (BYTE_LOADS_ZERO_EXTEND): Use it.
+	(H constraint): Changed to mean one or two.
+	* out-m88k.c: Use the proper includes for non-USG systems.
+	* xm-m88k.h: Include tm.h at the end.	
+
+Wed Feb	 6 02:24:38 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* cplus-decl.c (pushtag): Don't try to nest classes from non-C++
+	language scopes.
+
+Wed Feb	 6 01:33:16 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* cse.c (simplify_binary_operation): Don't change div into mult.
+
+Tue Feb	 5 10:59:53 1991  Ken Raeburn  (raeburn at watch.com)
+
+	* cplus-parse.y (template_instantiation): Supply base class list
+	and use guts of class declaration.  Untested; will have to be
+	fixed up to deal with template context manipulations.
+
+Tue Feb	 5 00:52:57 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* c-common.c (combine_strings): Finish fixing wide strings.
+
+	* reload1.c (possible_group_p): New subroutine.
+	(reload): Don't kill last group when looking for a non-group.
+
+	* expmed.c (expand_divmod): If emit cmp insn, force op0 into reg.
+
+	* objc-parse.y (init_lex, yylex): max_wide now measured in chars. 
+	(yylex): Treat \r as whitespace if traditional.
+
+	* toplev.c (compile_file): Add missing arg for dbxout_finish.
+
+	* objc-actions.c (lang_finish): New dummy function.
+
+	* calls.c (expand_call): Recognize other names for setjmp-like fns.
+
+	* gcc.c (main): Use obstack_init, not gcc_obstack_init.
+
+	* varasm.c (assemble_zeros): New function.
+	All calls to ASM_OUTPUT_SKIP elsewhere now use this function.
+	Handle ASM_NO_SKIP_IN_TEXT.
+	* toplev.c (compile_file): Use assemble_zeros.
+	* final.c (end_final): Likewise.
+	* tm-3b1.h, tm-att386.h, tm-mot3300.h (ASM_NO_SKIP_IN_TEXT):
+	Define as 1.
+	* tm-3b1.h (ASM_OUTPUT_SKIP): Don't deal with outputting zeros.
+
+Mon Feb	 4 20:37:33 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* m68k.md: Use %$ and %& where appropriate.
+	(special float_truncate pattern): New, for 68040.
+	(68881 DF multiply recognizers): Avoid fscale if 68040. 
+	(68881 SF multiply recognizers): Avoid fsglmul if 68040.
+
+	* tm-next.h (SECTION_FUNCTION): Simplify; remove last arg. 
+	(EXTRA_SECTION_FUNCTIONS): Rewrite to go with that change. 
+
+Mon Feb	 4 18:22:54 1991  Richard Kenner  (kenner at vlsi1.ultra.nyu.edu)
+
+	* reorg.c (link_cc0_isns): New function.
+	(fill_simple_delay_slots, fill_slots_from_thread): Call it.
+	(fill_slots_from_thread): Don't make REG_CC_STATUS notes.
+	(delete_scheduled_jump): Use REG_CC_SETTER instead of REG_CC_STATUS.
+	Correctly locate compare insn in CC0 case.
+	(steal_delay_list_from_target): Don't steal an insn that sets cc0;
+	we can't safely copy it.
+	(fill_slots_from_thread): Can't put insn that sets CC0 in delay slot
+	if we don't own its thread; this would otherwise require copying it.
+	(relax_delay_slots): Don't collapse jump to next insn if it has a
+	cc0-setting insn in a delay slot.
+
+	* reorg.c (update_block): Accept location to place USE marker; use if
+	INSN is in a delay slot.
+	(mark_target_live_regs): Handle the case where we deleted the start
+	of the basic block that was previously used for a target.
+	Ignore insns with INSN_FROM_TARGET_P.
+	(optimize_skip, try_merge_delay_insns, fill_simple_delay_slots):
+	Pass new argument to update_block.
+	(try_merge_delay_insns, redundant_insn_p): Clear INSN_FROM_TARGET_P
+	to show that this insn will be used in both paths of the branch.
+	(try_merge_delay_insns): Add calls to update_block for insns deleted
+	from delay slots.
+
+	* reorg.c (mostly_true_jump): If no jumps between target and end of
+	function, predict as false.
+	If comparison == 0, predict false; != 0, predict true.
+
+	* reorg.c (steal_delay_list_from_{target,fallthrough}):
+	Ignore redundant insn even if it can't be placed in our delay slot.
+	(fill_slots_from_thread): Likewise.
+	Ensure we don't call redundant_insn_p on any insns that conflict
+	with what we need and set.
+
+	* reorg.c (fill_eager_delay_slots): Pick up new value of JUMP_LABEL;
+	it may have been changed by first call to fill_slots_from_thread.
+
+	* rtl.h (REG_TAIL_CALL): Deleted; never documented or used.
+	(REG_CC_SETTER, REG_CC_USER): Replacements for REG_CC_STATUS.
+	* rtl.c (reg_note_name): New names.
+	* final.c (final_scan_insn): Replace REG_CC_STATUS with REG_CC_SETTER;
+	now only one insn.
+	* emit-rtl.c (next_cc0_user, prev_cc0_setter): Use REG_CC_SETTER and
+	REG_CC_USER.
+
+	* cplus-cadillac.c, cplus-class.c, cplus-decl.c, cplus-lex.c:
+	Replace obstack_init with gcc_obstack_init.
+	* cplus-search.c, flow.c, gcc.c, loop.c, reload1.c: Likewise.
+	* reorg.c, stmt.c: Likewise.
+
+	* reload1.c (eliminate_regs, case ASM_OPERANDS): Fix typo when making
+	new ASM_OPERANDS.
+
+	* recog.c: Now includes insn-flags.h and insn-codes.h.
+	(validate_replace_rtx_1): If replacing the source of a ZERO_ or
+	SIGN_EXTRACT with a MEM, try to put the MEM in the mode to be used for
+	the MEM.
+	* Makefile.in (recog.o): Depends on insn-flags.h and insn-codes.h.
+
+Mon Feb	 4 17:39:36 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* c-typeck.c (digest_init): Error if init array with another array.
+
+Mon Feb	 4 04:58:20 1991  Ken Raeburn  (raeburn at watch.com)
+
+	* cplus-tree.def (TEMPLATE_DECL): New node type.
+	(TEMPLATE_PARM_IDX): New node type; like integer, with an extra
+	field.
+
+	* cplus-method.c (check_text_len): Fix up error message to be more
+	correct.  Moved function before new_text_len so that the latter
+	can call it and inlining can work.
+	(new_text_len): Call check_text_len.
+
+	* cplus-method.c (build_overload_name): No longer static.
+
+	* cplus-class.c (unuse_fields): Now static.
+	(popclass): Use a temporary when building C_C_D.
+
+	* cplus-decl.c (lookup_tag): Don't complain about type mismatch if
+	the tag found is for a template.
+
+	* cplus-lex.c: New lookup tables, for new "template" keyword.
+	(reinit_lang_specific): Call init_template.
+	(init_lex): Ditto.
+	(file_from_saved_text): Renamed from input_from_saved_text.
+
+	* cplus-lex.c (identifier_type): New function; returns primary
+	type (IDENTIFIER, TYPENAME, PTYPENAME) indicated by token name.	 A
+	PTYPENAME is returned for (TYPE_DECL (TEMPLATE_DECL ...)) nodes.
+	(see_typename): Call it.
+
+	* cplus-lex.c (yylex): In handling identifiers, use subset of
+	TYPENAME code for PTYPENAME tokens.
+
+	* cplus-template.c: New file.
+	(begin_template_parm_list): Push new scope and switch to permanent
+	obstack.
+	(end_template_parm_list): Return parameter list as a tree vector.
+	(end_template_decl): Save away new TEMPLATE_DECL node.
+	(process_template_parm): Build up tree list of template
+	parameters.
+	(instantiate_template): For now, just complain.
+	(init_template): Set up template obstack.
+	(reinit_parse_for_template): Gobble up class definition text and
+	save it away.
+
+	* cplus-parse.y (template_header, template_parm_list): Call above
+	routines.
+	(datadef): Put template declarations here, instead of in
+	class_head.
+	(named_class_head_sans_basetype, named_class_head,
+	unnamed_class_head): Break up old class_head derivations.
+	(class_head): Now any of the above, plus template types with or
+	without instantiation.
+	(template_type): Call instantiate_template.
+	(template_arg_list): Build up list of args.
+
+	* cplus-tree.h (lang_type): Add TEMPLATE field.	 Also add macro
+	TYPE_TEMPLATE.
+
+Sun Feb	 3 21:16:36 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* tm-m68k.h (PRINT_OPERAND): Handle `&' and `$'.
+	(PRINT_OPERAND_PUNCT_VALID): They are valid.
+
+	* out-next.c (handle_pragma): Unread the newline.
+
+	* toplev.c (main): Warn if meaningless optimizations are requested.
+	Don't enable options by default that would get warnings.
+
+	* m68k.md (extend QI to HI): Typo in clr insn.
+
+	* c-common.c (combine_strings): Decrement LEN properly when copying.
+	* c-parse.y (init_lex, yylex): max_wide now measured in chars. 
+
+	* tree.c (gcc_obstack_init): Fix typo in forward decl.
+
+Sat Feb	 2 09:24:56 1991  Michael Tiemann  (tiemann at cygnus.com)
+
+	* cplus-decl.c (poplevel): Change DECL_CONTEXT of decls only of
+	their context is CURRENT_FUNCTION_DECL.
+
+Fri Feb	 1 13:46:07 1991  Richard Stallman  (rms at mole.ai.mit.edu)
+
+	* print-tree.c (print_node): Don't print chain for `c' and `x' nodes.
+
+	* loop.c (record_excess_regs): Moved here.
+
+See file ChangeLog.2.