From 16e42128c24f5df8a61cfd2e6cdf3bd3966db0c5 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Mon, 3 Jan 2011 21:03:33 +0000
Subject: fix rdar://8813415 - a miscompilation of 164.gzip that loop-idiom
 exposed.  It turns out to be a latent bug in basicaa, scary.

llvm-svn: 122772
---
 llvm/lib/Analysis/BasicAliasAnalysis.cpp | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'llvm/lib/Analysis/BasicAliasAnalysis.cpp')

diff --git a/llvm/lib/Analysis/BasicAliasAnalysis.cpp b/llvm/lib/Analysis/BasicAliasAnalysis.cpp
index 1a526fc9306..8e0637a49b5 100644
--- a/llvm/lib/Analysis/BasicAliasAnalysis.cpp
+++ b/llvm/lib/Analysis/BasicAliasAnalysis.cpp
@@ -103,6 +103,8 @@ static bool isObjectSmallerThan(const Value *V, uint64_t Size,
                                 const TargetData &TD) {
   const Type *AccessTy;
   if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(V)) {
+    if (!GV->hasDefinitiveInitializer())
+      return false;
     AccessTy = GV->getType()->getElementType();
   } else if (const AllocaInst *AI = dyn_cast<AllocaInst>(V)) {
     if (!AI->isArrayAllocation())
-- 
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