From b87f0847c27e2d5c6e431ef34b9c26bb40409d86 Mon Sep 17 00:00:00 2001
From: davidxl <davidxl@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri, 27 Mar 2009 17:18:58 +0000
Subject: Fix for PR39548

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@145118 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/tree-ssa-copy.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'gcc/tree-ssa-copy.c')

diff --git a/gcc/tree-ssa-copy.c b/gcc/tree-ssa-copy.c
index 654ba950228..64c697a5196 100644
--- a/gcc/tree-ssa-copy.c
+++ b/gcc/tree-ssa-copy.c
@@ -908,7 +908,8 @@ copy_prop_visit_phi_node (gimple phi)
 	}
     }
 
-  if (phi_val.value && set_copy_of_val (lhs, phi_val.value))
+  if (phi_val.value &&  may_propagate_copy (lhs, phi_val.value)
+      && set_copy_of_val (lhs, phi_val.value))
     retval = (phi_val.value != lhs) ? SSA_PROP_INTERESTING : SSA_PROP_VARYING;
   else
     retval = SSA_PROP_NOT_INTERESTING;
-- 
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