From: danglin <danglin@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Sat, 9 Feb 2008 00:30:13 +0000 (+0000)
Subject: 	PR middle-end/34627
X-Git-Url: http://git.sourceforge.jp/view?p=pf3gnuchains%2Fgcc-fork.git;a=commitdiff_plain;h=76d5115af59a7ff2ba8d4a0424239acdc70e5389;ds=sidebyside

	PR middle-end/34627
	combine.c (simplify_if_then_else): Make sure the comparison is
	against const0_rtx when simplifying to (abs x) or (neg (abs X)).



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@132193 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 910417b73f1..918ff4b8026 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2008-02-08  Steven Bosscher  <stevenb.gcc@gmail.com>
+
+	PR middle-end/34627
+	combine.c (simplify_if_then_else): Make sure the comparison is
+	against const0_rtx when simplifying to (abs x) or (neg (abs X)).
+
 2008-02-08  Richard Sandiford  <rsandifo@nildram.co.uk>
 
 	PR bootstrap/35051
diff --git a/gcc/combine.c b/gcc/combine.c
index 5cfa3051b0d..b812b33ac41 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -5393,9 +5393,10 @@ simplify_if_then_else (rtx x)
   /* Look for cases where we have (abs x) or (neg (abs X)).  */
 
   if (GET_MODE_CLASS (mode) == MODE_INT
+      && comparison_p
+      && XEXP (cond, 1) == const0_rtx
       && GET_CODE (false_rtx) == NEG
       && rtx_equal_p (true_rtx, XEXP (false_rtx, 0))
-      && comparison_p
       && rtx_equal_p (true_rtx, XEXP (cond, 0))
       && ! side_effects_p (true_rtx))
     switch (true_code)