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/rtl.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'gcc/rtl.h')

diff --git a/gcc/rtl.h b/gcc/rtl.h
index 4351712..1a20ae4 100644
--- a/gcc/rtl.h
+++ b/gcc/rtl.h
@@ -892,6 +892,22 @@ extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
 #define HAVE_POST_DECREMENT 0
 #endif
 
+#ifndef HAVE_POST_MODIFY_DISP
+#define HAVE_POST_MODIFY_DISP 0
+#endif
+
+#ifndef HAVE_POST_MODIFY_REG
+#define HAVE_POST_MODIFY_REG 0
+#endif
+
+#ifndef HAVE_PRE_MODIFY_DISP
+#define HAVE_PRE_MODIFY_DISP 0
+#endif
+
+#ifndef HAVE_PRE_MODIFY_REG
+#define HAVE_PRE_MODIFY_REG 0
+#endif
+
 
 /* Some architectures do not have complete pre/post increment/decrement
    instruction sets, or only move some modes efficiently.  These macros
@@ -1260,6 +1276,7 @@ extern int rtx_addr_varies_p		PARAMS ((rtx));
 extern HOST_WIDE_INT get_integer_term	PARAMS ((rtx));
 extern rtx get_related_value		PARAMS ((rtx));
 extern int reg_mentioned_p		PARAMS ((rtx, rtx));
+extern int count_occurrences		PARAMS ((rtx, rtx, int));
 extern int reg_referenced_p		PARAMS ((rtx, rtx));
 extern int reg_used_between_p		PARAMS ((rtx, rtx, rtx));
 extern int reg_referenced_between_p	PARAMS ((rtx, rtx, rtx));
-- 
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