From 4e84e7720c333112da24bd4e9d4c7bfb4d446016 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Mon, 6 Oct 2003 17:33:39 +0000
Subject: [PATCH] Users can never be null

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8895 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/VMCore/Value.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/VMCore/Value.cpp b/lib/VMCore/Value.cpp
index d0fcafbdf01..95670f39826 100644
--- a/lib/VMCore/Value.cpp
+++ b/lib/VMCore/Value.cpp
@@ -87,7 +87,7 @@ void Value::uncheckedReplaceAllUsesWith(Value *New) {
 
 
 void Value::killUse(User *U) {
-  if (U == 0) return;
+  assert(U != 0 && "Null users are not allowed!");
   unsigned i;
 
   // Scan backwards through the uses list looking for the user.  We do this