From: Jan Hubicka <jh@suse.cz>
Date: Tue, 7 Sep 2004 14:56:50 +0000 (+0200)
Subject: * tree-ssa-loop-ivopts.c (iv_value): Avoid invalid sharing on niter.
X-Git-Tag: releases/gcc-4.0.0~5180
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=6b094f38d7561422c087a31d26a8d36b58d7a549;p=thirdparty%2Fgcc.git

* tree-ssa-loop-ivopts.c (iv_value): Avoid invalid sharing on niter.

From-SVN: r87143
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index b5fd1d9aa1a5..6d7e47306dc9 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2004-09-07  Jan Hubicka  <jh@suse.cz>
+
+	* tree-ssa-loop-ivopts.c (iv_value): Avoid invalid sharing on niter.
+
 2004-09-07  Nathan Sidwell  <nathan@codesourcery.com>
 
 	* builtins.c (fold_builtin_strchr): Use build_int_cst, not
diff --git a/gcc/tree-ssa-loop-ivopts.c b/gcc/tree-ssa-loop-ivopts.c
index 7234660412b9..be4958d2a796 100644
--- a/gcc/tree-ssa-loop-ivopts.c
+++ b/gcc/tree-ssa-loop-ivopts.c
@@ -2908,7 +2908,7 @@ iv_value (struct iv *iv, tree niter)
   tree type = TREE_TYPE (iv->base);
 
   niter = fold_convert (type, niter);
-  val = fold (build2 (MULT_EXPR, type, iv->step, niter));
+  val = fold (build2 (MULT_EXPR, type, iv->step, unsave_expr_now (niter)));
 
   return fold (build2 (PLUS_EXPR, type, iv->base, val));
 }