2002-07-15 Michael Matz <matz@suse.de>,

            Daniel Berlin  <dberlin@dberlin.org>,
	    Denis Chertykov  <denisc@overta.ru>

	Add a new register allocator.

	* ra.c: New file.
	* ra.h: New file.
	* ra-build.c: New file.
	* ra-colorize.c: New file.
	* ra-debug.c: New file.
	* ra-rewrite.c: New file.

	* Makefile.in (ra.o, ra-build.o, ra-colorize.o, ra-debug.o,
	(ra-rewrite.o): New .o files for libbackend.a.
	(GTFILES): Add basic-block.h.

	* toplev.c (flag_new_regalloc): New.
	(f_options): New option "new-ra".
	(rest_of_compilation): Call initialize_uninitialized_subregs()
	only for the old allocator.  If flag_new_regalloc is set, call
	new allocator, instead of local_alloc(), global_alloc() and
	friends.

	* doc/invoke.texi: Document -fnew-ra.
	* basic-block.h (FOR_ALL_BB): New.
	* config/rs6000/rs6000.c (print_operand): Write small constants
	as @l+80.

	* df.c (read_modify_subreg_p): Narrow down cases for a rmw subreg.
	(df_reg_table_realloc): Make size at least as large as max_reg_num().
	(df_insn_table_realloc): Size argument now is absolute, not relative.
	Changed all callers.

	* gengtype.c (main): Add the pseudo-type "HARD_REG_SET".
	* regclass.c (reg_scan_mark_refs): Ignore NULL rtx's.

	2002-06-20  Michael Matz  <matz@suse.de>

	* df.h (struct ref.id): Make unsigned.
	* df.c (df_bb_reg_def_chain_create): Remove unsigned cast.

	2002-06-13  Michael Matz  <matz@suse.de>

	* df.h (DF_REF_MODE_CHANGE): New flag.
	* df.c (df_def_record_1, df_uses_record): Set this flag for refs
	involving subregs with invalid mode changes, when
	CLASS_CANNOT_CHANGE_MODE is defined.

	2002-05-07  Michael Matz  <matz@suse.de>

	* reload1.c (fixup_abnormal_edges): Don't insert on NULL edge.

	2002-05-03  Michael Matz  <matz@suse.de>

	* sbitmap.c (sbitmap_difference): Accept sbitmaps of different size.

	Sat Feb  2 18:58:07 2002  Denis Chertykov  <denisc@overta.ru>

	* regclass.c (regclass): Work with all regs which have sets or
	refs.
	(reg_scan_mark_refs): Count regs inside (clobber ...).

	2002-01-04  Michael Matz  <matzmich@cs.tu-berlin.de>

	* df.c (df_ref_record): Correctly calculate SUBREGs of hardregs.
	(df_bb_reg_def_chain_create, df_bb_reg_use_chain_create): Only
	add new refs.
	(df_bb_refs_update): Don't clear insns_modified here, ...
	(df_analyse): ... but here.

	* sbitmap.c (dump_sbitmap_file): New.
	(debug_sbitmap): Use it.

	* sbitmap.h (dump_sbitmap_file): Add prototype.

	2001-08-07  Daniel Berlin  <dan@cgsoftware.com>

	* df.c (df_insn_modify): Grow the UID table if necessary, rather
	than assume all emits go through df_insns_modify.

	2001-07-26  Daniel Berlin  <dan@cgsoftware.com>

	* regclass.c (reg_scan_mark_refs): When we increase REG_N_SETS,
	increase REG_N_REFS (like flow does), so that regclass doesn't
	think a reg is useless, and thus, not calculate a class, when it
	really should have.

	2001-01-28  Daniel Berlin  <dberlin@redhat.com>

	* sbitmap.h (EXECUTE_IF_SET_IN_SBITMAP_REV): New macro, needed for
	dataflow analysis.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@55458 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 7 insertions, 1 deletions

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index e8f6d1262b6..ecf87f470ed 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -270,7 +270,7 @@ in the following sections.
 -fif-conversion -fif-conversion2 @gol
 -finline-functions  -finline-limit=@var{n}  -fkeep-inline-functions @gol
 -fkeep-static-consts  -fmerge-constants  -fmerge-all-constants @gol
--fmove-all-movables  -fno-default-inline  -fno-defer-pop @gol
+-fmove-all-movables  -fnew-ra -fno-default-inline  -fno-defer-pop @gol
 -fno-function-cse  -fno-guess-branch-probability @gol
 -fno-inline  -fno-math-errno  -fno-peephole  -fno-peephole2 @gol
 -funsafe-math-optimizations -fno-trapping-math @gol
@@ -3395,6 +3395,12 @@ types.  Languages like C or C++ require each non-automatic variable to
 have distinct location, so using this option will result in non-conforming
 behavior.
 
+@item -fnew-ra
+@opindex fnew-ra
+Use a graph coloring register allocator.  Currently this option is meant
+for testing, so we are interested to hear about miscompilations with
+@option{-fnew-ra}.
+
 @item -fno-function-cse
 @opindex fno-function-cse
 Do not put function addresses in registers; make each instruction that