From c2580ab9b03fa703f03ad1c171d581c9d9ea6de6 Mon Sep 17 00:00:00 2001
From: Owen Anderson <resistor@mac.com>
Date: Tue, 19 Feb 2008 02:53:23 +0000
Subject: [PATCH] Fix Transforms/GVN/memcpy.ll, which Chris broke in r47275 by
 reordering the branches.  memcpy's are a kind of CallInst.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47305 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/Scalar/GVN.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/Transforms/Scalar/GVN.cpp b/lib/Transforms/Scalar/GVN.cpp
index efe8254cd54..e8337600727 100644
--- a/lib/Transforms/Scalar/GVN.cpp
+++ b/lib/Transforms/Scalar/GVN.cpp
@@ -1121,7 +1121,8 @@ bool GVN::processMemCpy(MemCpyInst* M,
       dep == MemoryDependenceAnalysis::NonLocal)
     return false;
   else if (CallInst* C = dyn_cast<CallInst>(dep))
-    return performReturnSlotOptzn(M, C, toErase);
+    if (!isa<MemCpyInst>(C))
+      return performReturnSlotOptzn(M, C, toErase);
   else if (!isa<MemCpyInst>(dep))
     return false;