From: Jan Hubicka <jh@suse.cz>
Date: Fri, 23 Jan 2004 22:05:19 +0000 (+0100)
Subject: emit-rtl.c (change_address_1): Do not re-generate the RTX if nothing change.
X-Git-Tag: releases/gcc-4.0.0~10782
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=a74ff877641c745eda294f04564a7ac7fc9b9e9d;p=thirdparty%2Fgcc.git

emit-rtl.c (change_address_1): Do not re-generate the RTX if nothing change.


	* emit-rtl.c (change_address_1):  Do not re-generate the RTX if nothing
	change.

From-SVN: r76457
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ed7405890b6a..2a4f30adf69b 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,8 @@
 2004-01-23  Jan Hubicka  <jh@suse.cz>
 
+	* emit-rtl.c (change_address_1):  Do not re-generate the RTX if nothing
+	change.
+
 	* alloc-pool.c (align_four): Kill.
 	(create_alloc_pool): Align size to eight.
 	(free_alloc_pool, free_pool): Invalidate deallocated data.
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c
index cdb0c2a3c316..f576e76ca758 100644
--- a/gcc/emit-rtl.c
+++ b/gcc/emit-rtl.c
@@ -1840,6 +1840,9 @@ change_address_1 (rtx memref, enum machine_mode mode, rtx addr, int validate)
     mode = GET_MODE (memref);
   if (addr == 0)
     addr = XEXP (memref, 0);
+  if (mode == GET_MODE (memref) && addr == XEXP (memref, 0)
+      && (!validate || memory_address_p (mode, addr)))
+    return memref;
 
   if (validate)
     {