From: Jiong Wang <jiwang@gcc.gnu.org>
Date: Fri, 7 Nov 2014 11:08:30 +0000 (+0000)
Subject: [PATCH] PR63676, exit tree fold when node be TREE_CLOBBER_P
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=8c00ba08c614069a590c673fe20afe9a5f1f55fe;p=gcc.git

[PATCH] PR63676, exit tree fold when node be TREE_CLOBBER_P

  gcc/
    PR tree-optimization/63676
    * gimple-fold.c (fold_gimple_assign): Do not fold node when
    TREE_CLOBBER_P be true.

From-SVN: r217215
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 88b7422e7ee..7535286f915 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2014-11-07  Jiong Wang  <jiong.wang@arm.com>
+2014-11-07  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/63676
+	* gimple-fold.c (fold_gimple_assign): Do not fold node when
+	TREE_CLOBBER_P be true.
+
 2014-11-07  Richard Biener  <rguenther@suse.de>
 
 	PR middle-end/63770
diff --git a/gcc/gimple-fold.c b/gcc/gimple-fold.c
index 547f9a75c36..71e46388d61 100644
--- a/gcc/gimple-fold.c
+++ b/gcc/gimple-fold.c
@@ -320,6 +320,9 @@ fold_gimple_assign (gimple_stmt_iterator *si)
       {
         tree rhs = gimple_assign_rhs1 (stmt);
 
+	if (TREE_CLOBBER_P (rhs))
+	  return NULL_TREE;
+
 	if (REFERENCE_CLASS_P (rhs))
 	  return maybe_fold_reference (rhs, false);