From c99acc3709f789baaf75b4ab3e1907b0226d620b Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Tue, 20 Apr 2004 20:26:03 +0000
Subject: [PATCH] Fix PR325

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13081 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/Scalar/LoopUnroll.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Transforms/Scalar/LoopUnroll.cpp b/lib/Transforms/Scalar/LoopUnroll.cpp
index 74724cce60e..33148200b46 100644
--- a/lib/Transforms/Scalar/LoopUnroll.cpp
+++ b/lib/Transforms/Scalar/LoopUnroll.cpp
@@ -132,7 +132,7 @@ bool LoopUnroll::visitLoop(Loop *L) {
   if (!TripCountC) return Changed;  // Must have constant trip count!
 
   unsigned TripCount = TripCountC->getRawValue();
-  if (TripCount != TripCountC->getRawValue())
+  if (TripCount != TripCountC->getRawValue() || TripCount == 0)
     return Changed; // More than 2^32 iterations???
 
   unsigned LoopSize = ApproximateLoopSize(L);