From 0f01a5dcbee8d87e6dc311b41acee5f2fc482f9b Mon Sep 17 00:00:00 2001
From: Matt Pharr <matt.pharr@intel.com>
Date: Fri, 27 Jan 2012 16:48:14 -0800
Subject: [PATCH] Handle undef values in LLVMVectorValuesAllEqual()

---
 llvmutil.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/llvmutil.cpp b/llvmutil.cpp
index 808babbc..4ae07b96 100644
--- a/llvmutil.cpp
+++ b/llvmutil.cpp
@@ -669,6 +669,10 @@ LLVMVectorValuesAllEqual(llvm::Value *v, int vectorLength,
         return true;
     }
 
+    if (llvm::isa<llvm::UndefValue>(v))
+        // ?
+        return false;
+
     Assert(!llvm::isa<llvm::Constant>(v));
 
     if (llvm::isa<llvm::CallInst>(v) || llvm::isa<llvm::LoadInst>(v) ||