From: Richard Guenther <rguenther@suse.de>
Date: Wed, 25 Jan 2012 15:37:33 +0000 (+0000)
Subject: tree-ssa-sccvn.c (vn_reference_eq): Also compare if both bases are dereferenced.
X-Git-Tag: releases/gcc-4.6.3~148
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=58670766053ca6018328aea6034cb1578b83ff24;p=thirdparty%2Fgcc.git

tree-ssa-sccvn.c (vn_reference_eq): Also compare if both bases are dereferenced.

2012-01-25  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-sccvn.c (vn_reference_eq): Also compare if both
	bases are dereferenced.

From-SVN: r183523
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c63ae26518b7..2e80e0af9fb0 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2012-01-25  Richard Guenther  <rguenther@suse.de>
+
+	* tree-ssa-sccvn.c (vn_reference_eq): Also compare if both
+	bases are dereferenced.
+
 2012-01-24  Richard Guenther  <rguenther@suse.de>
 
 	Forward-port to branch
diff --git a/gcc/tree-ssa-sccvn.c b/gcc/tree-ssa-sccvn.c
index eb8896907e99..6ed076d15b44 100644
--- a/gcc/tree-ssa-sccvn.c
+++ b/gcc/tree-ssa-sccvn.c
@@ -546,6 +546,7 @@ vn_reference_eq (const void *p1, const void *p2)
 	  tem1.type = TREE_TYPE (tem1.op0);
 	  tem1.opcode = TREE_CODE (tem1.op0);
 	  vro1 = &tem1;
+	  deref1 = false;
 	}
       if (deref2 && vro2->opcode == ADDR_EXPR)
 	{
@@ -554,7 +555,10 @@ vn_reference_eq (const void *p1, const void *p2)
 	  tem2.type = TREE_TYPE (tem2.op0);
 	  tem2.opcode = TREE_CODE (tem2.op0);
 	  vro2 = &tem2;
+	  deref2 = false;
 	}
+      if (deref1 != deref2)
+	return false;
       if (!vn_reference_op_eq (vro1, vro2))
 	return false;
       ++j;