From 4b983fdc50c590dde021fae533d8c3745897fdae Mon Sep 17 00:00:00 2001
From: Richard Henderson <rth@gcc.gnu.org>
Date: Fri, 28 Jul 2000 10:46:18 -0700
Subject: cse.c (canon_hash): Handle PRE_MODIFY/POST_MODIFY.

	* cse.c (canon_hash): Handle PRE_MODIFY/POST_MODIFY.
	(cse_insn): Likewise.
	(addr_affects_sp_p): Likewise.
	* expr.c (move_by_pieces): Likewise.
	(clear_by_pieces): Likewise.
	* gcse.c (oprs_unchanged_p): Likewise.
	* haifa-sched.c (sched_analyze_2): Likewise.
	* recog.c (offsettable_address_p): Likewise.
	* regclass.c (record_address_regs): Likewise.
	* reload.c (find_reusable_reload): Likewise.
	(push_reload): Likewise.
	(operands_match_p): Likewise.
	(decompose): Likewise.
	(find_reloads_address_1): Likewise.
	(find_inc_amount): Likewise.
	* reload1.c (elimination_effects): Likewise.
	* resource.c (mark_set_resources): Likewise.
	* flow.c (attempt_auto_inc): New function; mostly broken out
	of find_auto_inc.
	(find_auto_inc): Split into two functions and enhanced to
	generate POST_MODIFY.
	* rtl.def (PRE_MODIFY, POST_MODIFY): Adjust comment.
	* rtl.h (count_all_occurrences):  Declare.
	(HAVE_{PRE,POST}_MODIFY_{DISP,REG}): Provide default of 0 if not
	defined.
	* rtlanal.c (count_all_occurrences): New function.
	* tm.texi (HAVE_POST_MODIFY_DISP, HAVE_PRE_MODIFY_DISP,
	HAVE_POST_MODIFY_REG, HAVE_PRE_MODIFY_REG): Document.

	* config/ia64/ia64-protos.h (destination_operand): Declare.
	* config/ia64/ia64.c (destination_operand): New function.
	(ia64_print_operand): Handle POST_MODIFY.
	(rtx_needs_barrier): Likewise.
	* config/ia64/ia64.h (HAVE_POST_MODIFY_DISP): Define to 1.
	(HAVE_POST_MODIFY_REG): Define to 1.
	(MAX_REGS_PER_ADDRESS): Change to 2.
	(GO_IF_LEGITIMATE_ADDRESS): Accept POST_MODIFY too.
	(LEGITIMATE_ADDRESS_REG): New helper macro.
	(LEGITIMATE_ADDRESS_DISP): Likewise.
	(PREDICATE_CODES): Add entry for destination_operand.
	* config/ia64/ia64.md (all mov patterns): Use destination_operand
	predicate for operand 0.

From-SVN: r35321
---
 gcc/gcse.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'gcc/gcse.c')

diff --git a/gcc/gcse.c b/gcc/gcse.c
index 6275c09..cec2c88 100644
--- a/gcc/gcse.c
+++ b/gcc/gcse.c
@@ -1250,6 +1250,8 @@ oprs_unchanged_p (x, insn, avail_p)
     case PRE_INC:
     case POST_DEC:
     case POST_INC:
+    case PRE_MODIFY:
+    case POST_MODIFY:
       return 0;
 
     case PC:
-- 
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