From 68d024dde4b88830e94e6807aa277116b90ddae7 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Wed, 1 May 2002 15:38:23 +0000
Subject: [PATCH] Fixed bug:
 test/Regression/Transforms/Mem2Reg/2002-05-01-ShouldNotPromoteThisAlloca.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2423 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/Utils/PromoteMemoryToRegister.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/Transforms/Utils/PromoteMemoryToRegister.cpp b/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
index ee8300215f7..294c39a08f2 100644
--- a/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
+++ b/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
@@ -79,6 +79,9 @@ static inline bool isSafeAlloca(const AllocaInst *AI) {
 
     // Only allow nonindexed memory access instructions...
     if (MemAccessInst *MAI = dyn_cast<MemAccessInst>(*UI)) {
+      if (MAI->getPointerOperand() != (Value*)AI)
+        return false;  // Reject stores of alloca pointer into some other loc.
+
       if (MAI->hasIndices()) {  // indexed?
         // Allow the access if there is only one index and the index is
         // zero.