From: Maxim Kuvyrkov <maxim@codesourcery.com>
Date: Mon, 25 Apr 2011 12:06:27 +0000 (+0000)
Subject: combine.c (combine_simplify_rtx): Avoid mis-simplifying conditionals for STORE_FLAG_V... 
X-Git-Tag: releases/gcc-4.7.0~7228
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=5157a881bba46a6cf7682eda323a00450b1f825f;p=thirdparty%2Fgcc.git

combine.c (combine_simplify_rtx): Avoid mis-simplifying conditionals for STORE_FLAG_VALUE==-1 case.

	* combine.c (combine_simplify_rtx): Avoid mis-simplifying conditionals
	for STORE_FLAG_VALUE==-1 case.

Co-Authored-By: Eric Botcazou <ebotcazou@adacore.com>

From-SVN: r172930
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 505d7437cd93..a115d78fddc3 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2011-04-25  Maxim Kuvyrkov  <maxim@codesourcery.com>
+	    Eric Botcazou <ebotcazou@adacore.com>
+
+	* combine.c (combine_simplify_rtx): Avoid mis-simplifying conditionals
+	for STORE_FLAG_VALUE==-1 case.
+
 2011-04-24  Richard Sandiford  <richard.sandiford@linaro.org>
 
 	PR target/43804
diff --git a/gcc/combine.c b/gcc/combine.c
index 240cd918d2ff..7bdbed4144c4 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -5787,7 +5787,10 @@ combine_simplify_rtx (rtx x, enum machine_mode op0_mode, int in_dest,
 
 	  /* If STORE_FLAG_VALUE is -1, we have cases similar to
 	     those above.  */
-	  if (STORE_FLAG_VALUE == -1
+	  if (in_cond)
+	    ;
+
+	  else if (STORE_FLAG_VALUE == -1
 	      && new_code == NE && GET_MODE_CLASS (mode) == MODE_INT
 	      && op1 == const0_rtx
 	      && (num_sign_bit_copies (op0, mode)