From e0d1d1acf6d7e518f0d3238a9f2756efec9d20ce Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Mon, 1 Apr 2002 00:45:09 +0000
Subject: [PATCH] Avoid incorrectly adding null values to the scalar map!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2085 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Analysis/DataStructure/FunctionRepBuilder.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/Analysis/DataStructure/FunctionRepBuilder.cpp b/lib/Analysis/DataStructure/FunctionRepBuilder.cpp
index f4689eb854d..f0d8aa3801e 100644
--- a/lib/Analysis/DataStructure/FunctionRepBuilder.cpp
+++ b/lib/Analysis/DataStructure/FunctionRepBuilder.cpp
@@ -267,6 +267,7 @@ void FunctionRepBuilder::visitStoreInst(StoreInst *SI) {
   // into data structures...
   //
   if (!isa<PointerType>(SI->getOperand(0)->getType())) return;
+  if (!ValueMap.count(SI->getOperand(0))) return;  // Src scalar has no values!
         
   const PointerValSet &SrcPVS = ValueMap[SI->getOperand(0)];
   const PointerValSet &PtrPVS = ValueMap[SI->getOperand(1)];