From 31bbb65ef80c1e18746aad26d005e36cc28b44d2 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Thu, 31 Oct 2002 17:09:06 +0000
Subject: [PATCH] Fix nasty bug in ::isNeg()

llvm-svn: 4470
---
 lib/VMCore/iOperators.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/VMCore/iOperators.cpp b/lib/VMCore/iOperators.cpp
index 5aa9714eb93..5a88986135b 100644
--- a/lib/VMCore/iOperators.cpp
+++ b/lib/VMCore/iOperators.cpp
@@ -91,7 +91,7 @@ static inline bool isConstantAllOnes(const Value *V) {
 bool BinaryOperator::isNeg(const Value *V) {
   if (const BinaryOperator *Bop = dyn_cast<BinaryOperator>(V))
     return Bop->getOpcode() == Instruction::Sub &&
-      isa<Constant>(Bop->getOperand(0)) && cast<Constant>(V)->isNullValue();
+      Bop->getOperand(0) == Constant::getNullValue(Bop->getType());
   return false;
 }