From: Richard Biener <rguenther@suse.de>
Date: Fri, 27 Jun 2014 10:03:51 +0000 (+0000)
Subject: tree-ssa-math-opts.c (bswap_replace): Fix SLOW_UNALIGNED_ACCESS test to only apply... 
X-Git-Tag: releases/gcc-5.1.0~6616
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3fd269db216915329a3f016e4a7431a82ed564ef;p=thirdparty%2Fgcc.git

tree-ssa-math-opts.c (bswap_replace): Fix SLOW_UNALIGNED_ACCESS test to only apply to unaligned object.

2014-06-27  Richard Biener  <rguenther@suse.de>

	* tree-ssa-math-opts.c (bswap_replace): Fix
	SLOW_UNALIGNED_ACCESS test to only apply to unaligned object.

From-SVN: r212068
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 9d96c2baf240..2ea692b8bb87 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2014-06-27  Richard Biener  <rguenther@suse.de>
+
+	* tree-ssa-math-opts.c (bswap_replace): Fix
+	SLOW_UNALIGNED_ACCESS test to only apply to unaligned object.
+
 2014-06-27  Martin Liska  <mliska@suse.cz>
 
 	* gimple.h (gimple_location_safe): New function introduced.
diff --git a/gcc/tree-ssa-math-opts.c b/gcc/tree-ssa-math-opts.c
index ca2b30dbc520..65dfdec55b95 100644
--- a/gcc/tree-ssa-math-opts.c
+++ b/gcc/tree-ssa-math-opts.c
@@ -2179,7 +2179,9 @@ bswap_replace (gimple cur_stmt, gimple_stmt_iterator gsi, gimple src_stmt,
       unsigned align;
 
       align = get_object_alignment (src);
-      if (bswap && SLOW_UNALIGNED_ACCESS (TYPE_MODE (load_type), align))
+      if (bswap
+	  && align < GET_MODE_ALIGNMENT (TYPE_MODE (load_type))
+	  && SLOW_UNALIGNED_ACCESS (TYPE_MODE (load_type), align))
 	return false;
 
       gsi_move_before (&gsi, &gsi_ins);