From 794a7490f8087cf7a5c965be37261d2282d3a871 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

llvm-svn: 8895
---
 llvm/lib/VMCore/Value.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/lib/VMCore/Value.cpp b/llvm/lib/VMCore/Value.cpp
index d0fcafbdf019..95670f398262 100644
--- a/llvm/lib/VMCore/Value.cpp
+++ b/llvm/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