From 085c801dee6869e657981750e723fe5cd1482c55 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Mon, 21 Apr 2003 19:15:26 +0000
Subject: [PATCH] Fix bug where use still existed in dead code

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5824 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/Utils/PromoteMemoryToRegister.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/Transforms/Utils/PromoteMemoryToRegister.cpp b/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
index d828f042d9e..8406910e6b9 100644
--- a/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
+++ b/lib/Transforms/Utils/PromoteMemoryToRegister.cpp
@@ -168,6 +168,8 @@ void PromoteMem2Reg::run() {
     //
     while (!I->use_empty()) {
       Instruction *U = cast<Instruction>(I->use_back());
+      if (!U->use_empty())  // If uses remain in dead code segment...
+        U->replaceAllUsesWith(Constant::getNullValue(U->getType()));
       U->getParent()->getInstList().erase(U);
     }
 
-- 
2.34.1