From e925ccc553e95cf348455b4ba1dca1fd5981f5bb Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Wed, 3 Sep 2008 00:29:13 +0000
Subject: [PATCH] Add additional check to ensure that iv is canonicalized.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55682 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/Scalar/LoopStrengthReduce.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
index 16b8dbb451f..96fa0e9eb16 100644
--- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@ -1935,6 +1935,7 @@ void LoopStrengthReduce::OptimizeIVType(Loop *L) {
 
     ConstantInt *CInit = dyn_cast<ConstantInt>(PHI->getIncomingValue(Entry));
     if (!CInit) return;
+    if (!CInit->isZero()) return;
 
     bool signedInit = CInit->getValue().isNegative();