From ee96af512a9d81ac048a1537d53b31aa26072f5f Mon Sep 17 00:00:00 2001
From: olga <olga@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 24 Apr 2007 15:54:18 +0000
Subject: [PATCH] fix for PR31617

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@124109 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/ChangeLog           | 6 ++++++
 gcc/fold-const.c        | 1 +
 gcc/testsuite/ChangeLog | 5 +++++
 3 files changed, 12 insertions(+)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7cc6435..9ab42d9 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2007-04-24  Richard Guenther  <rguenther@suse.de>
+	    Olga Golovanevsky  <olga@il.ibm.com>
+
+	* fold-const.c (multiple_of_p): Check for bottom 
+	to be zero. 
+
 2007-04-24  Richard Henderson  <rth@redhat.com>
 
 	* libgcc2.h (AVOID_FP_TYPE_CONVERSION): Rename from 
diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index 4e8f34f..7a8afcd 100644
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -13216,6 +13216,7 @@ multiple_of_p (tree type, tree top, tree bottom)
 
     case INTEGER_CST:
       if (TREE_CODE (bottom) != INTEGER_CST
+	  || integer_zerop (bottom)
 	  || (TYPE_UNSIGNED (type)
 	      && (tree_int_cst_sgn (top) < 0
 		  || tree_int_cst_sgn (bottom) < 0)))
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 0e11c69..7980e53 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2007-04-24  Andrew Pinski  <andrew_pinski@playstation.sony.com>
+	    Olga Golovanevsky  <olga@il.ibm.com>
+
+	* g++.dg/other/str_empty.C: New test.
+	
 2007-04-24  Richard Henderson  <rth@redhat.com>
 
 	* gcc.dg/vect/vect.exp: Don't run tests on Alpha.
-- 
2.7.4