rtl.h (MEM_READONLY_P): Replace RTX_UNCHANGING_P.

	* rtl.h (MEM_READONLY_P): Replace RTX_UNCHANGING_P.
	* alias.c (true_dependence): Update to match new semantics.
	(canon_true_dependence, write_dependence_p): Likewise.
	(anti_dependence, output_dependence): Update write_dependence_p args.
	(unchanging_anti_dependence): Remove.
	* calls.c (purge_mem_unchanging_flag): Remove.
	(fixup_tail_calls): Don't call it.
	(expand_call): Don't add unchanging memory to function usage.
	* expr.c (emit_block_move_via_libcall): Likewise.
	(clear_storage_via_libcall): Don't clobber RTX_UNCHANGING_P mems.
	(get_subtarget): Don't use RTX_UNCHANGING_P.
	(expand_assignment, store_constructor, expand_expr_real_1): Likewise.
	(do_tablejump): Set MEM_READONLY_P, not RTX_UNCHANGING_P.
	* combine.c (get_last_value_validate): Use MEM_READONLY_P.
	* cse.c (insert): Don't use RTX_UNCHANGING_P.
	(cse_insn, canon_hash): Use MEM_READONLY_P.
	* emit-rtl.c (set_mem_attributes_minus_bitpos): Use MEM_READONLY_P
	instead of RTX_UNCHANGING_P.
	* explow.c (maybe_set_unchanging): Remove.
	* expr.h (maybe_set_unchanging): Remove.
	* flow.c (insn_dead_p, mark_used_regs): Use anti_dependence.
	* function.c (assign_stack_temp_for_type): Don't use RTX_UNCHANGING_P.
	(assign_parm_setup_reg, expand_function_start): Likewise.
	* integrate.c (copy_rtx_and_substitute): Likewise.
	* ra-rewrite.c (emit_colors): Likewise.
	* regmove.c (copy_src_to_dest, regmove_optimize): Likewise.
	(fixup_match_1): Likewise.
	* reload1.c (reload, alter_reg): Likewise.
	* local-alloc.c (validate_equiv_mem): Check MEM_READONLY_P,
	not RTX_UNCHANGING_P.
	(equiv_init_varies_p): Likewise.
	* loop-invariant.c (check_maybe_invariant): Likewise.
	* resource.c (mark_referenced_resources, mark_set_resources): Likewise.
	* loop.c (note_addr_stored): Likewise.
	(prescan_loop): Likewise. Don't check function usage for clobbered
	unchanging memory.
	* rtlanal.c (rtx_unstable_p): Check MEM_READONLY_P,
        not RTX_UNCHANGING_P.
	(rtx_varies_p, modified_between_p, modified_in_p): Likewise.
	* varasm.c (force_const_mem): Likewise.
	* stmt.c (expand_decl): Don't set RTX_UNCHANGING_P.
	* web.c (entry_register): Likewise.
	* tree-gimple.h (get_base_address): Move decl ...
	* tree.h: ... here.
	* doc/rtl.texi (MEM_READONLY_P): Replace RTX_UNCHANGING_P.

	* config/alpha/alpha.c (alpha_set_memflags_1): Rewrite to be
	called via for_each_rtx.  Copy MEM_SCALAR_P, MEM_NOTRAP_P too.
	(alpha_set_memflags): Update to match.

	* config/darwin.c (machopic_indirect_data_reference): Set
	MEM_READONLY_P instead of RTX_UNCHANGING_P.
	(machopic_indirect_call_target): Likewise.
	(machopic_legitimize_pic_address): Likewise.
	* config/arm/arm.c (legitimize_pic_address, arm_gen_load_multiple,
	arm_gen_store_multiple, arm_gen_movmemqi): Likewise.
	* config/arm/arm.md (load_multiple, store_multiple): Likewise.
	* config/frv/frv.md (symGOT2reg): Likewise.
	* config/i386/i386.c (legitimize_pic_address,
	legitimize_tls_address, ix86_split_to_parts): Likewise.
	* config/ia64/ia64.c (ia64_expand_tls_address): Likewise.
	* config/ia64/ia64.md (load_fptr): Likewise.
	* config/m32r/m32r.c (m32r_legitimize_pic_address): Likewise.
	* config/m68k/m68k.c (legitimize_pic_address): Likewise.
	* config/mcore/mcore.c (block_move_sequence): Likewise.
	* config/mn10300/mn10300.md (symGOT2reg): Likewise.
	* config/pa/pa.c (legitimize_pic_address): Likewise.
	* config/rs6000/rs6000.c (rs6000_legitimize_tls_address): Likewise.
	(rs6000_emit_move): Likewise.
	* config/s390/s390.c (legitimize_pic_address): Likewise.
	(legitimize_tls_address): Likewise.
	* config/s390/s390.md (casesi): Likewise.
	* config/sh/sh.c (prepare_move_operands, sh_reorg): Likewise.
	* config/sh/sh.md (symGOT2reg): Likewise.
	* config/sparc/sparc.c (legitimize_pic_address): Likewise.
	* config/v850/v850.md (casesi): Likewise.

	* config/ia64/ia64.c (gen_thread_pointer): Don't set RTX_UNCHANGING_P.
	* config/iq2000/iq2000.c (save_restore_insns): Likewise.
	* config/mips/mips.c (mips_restore_gp): Likewise.
	(mips_save_restore_reg, mips16_gp_pseudo_reg): Likewise.
	* config/sh/sh.c (sh_reorg): Likewise.

From-SVN: r86178

1 files changed, 5 insertions, 13 deletions

diff --git a/gcc/cse.c b/gcc/cse.c
index 6880787f4c5..15e2dc8e60b 100644
--- a/gcc/cse.c
+++ b/gcc/cse.c
@@ -1461,13 +1461,7 @@ insert (rtx x, struct table_elt *classp, unsigned int hash, enum machine_mode mo
   elt->related_value = 0;
   elt->in_memory = 0;
   elt->mode = mode;
-  elt->is_const = (CONSTANT_P (x)
-		   /* GNU C++ takes advantage of this for `this'
-		      (and other const values).  */
-		   || (REG_P (x)
-		       && RTX_UNCHANGING_P (x)
-		       && REGNO (x) >= FIRST_PSEUDO_REGISTER)
-		   || fixed_base_plus_p (x));
+  elt->is_const = (CONSTANT_P (x) || fixed_base_plus_p (x));
 
   if (table[hash])
     table[hash]->prev_same_hash = elt;
@@ -2094,7 +2088,7 @@ canon_hash_string (const char *ps)
    Store 1 in do_not_record if any subexpression is volatile.
 
    Store 1 in hash_arg_in_memory if X contains a MEM rtx
-   which does not have the RTX_UNCHANGING_P bit set.
+   which does not have the MEM_READONLY_P bit set.
 
    Note that cse_insn knows that the hash code of a MEM expression
    is just (int) MEM plus the hash code of the address.  */
@@ -2229,7 +2223,7 @@ canon_hash (rtx x, enum machine_mode mode)
 	  do_not_record = 1;
 	  return 0;
 	}
-      if (! RTX_UNCHANGING_P (x) || fixed_base_plus_p (XEXP (x, 0)))
+      if (!MEM_READONLY_P (x))
 	hash_arg_in_memory = 1;
 
       /* Now that we have already found this special case,
@@ -2249,7 +2243,7 @@ canon_hash (rtx x, enum machine_mode mode)
 	  hash += (unsigned) USE;
 	  x = XEXP (x, 0);
 
-	  if (! RTX_UNCHANGING_P (x) || fixed_base_plus_p (XEXP (x, 0)))
+	  if (!MEM_READONLY_P (x))
 	    hash_arg_in_memory = 1;
 
 	  /* Now that we have already found this special case,
@@ -5974,9 +5968,7 @@ cse_insn (rtx insn, rtx libcall_insn)
 		      sets[i].dest_hash, GET_MODE (dest));
 
 	elt->in_memory = (MEM_P (sets[i].inner_dest)
-			  && (! RTX_UNCHANGING_P (sets[i].inner_dest)
-			      || fixed_base_plus_p (XEXP (sets[i].inner_dest,
-							  0))));
+			  && !MEM_READONLY_P (sets[i].inner_dest));
 
 	/* If we have (set (subreg:m1 (reg:m2 foo) 0) (bar:m1)), M1 is no
 	   narrower than M2, and both M1 and M2 are the same number of words,