From 9e81a440f5229f13e21031c208fdecbe07b056c7 Mon Sep 17 00:00:00 2001
From: Nadav Rotem <nrotem@apple.com>
Date: Mon, 10 Dec 2012 21:45:01 +0000
Subject: [PATCH] Enable the loop vectorizer only on O2 and above. (Still
 disabled by default)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169774 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/IPO/PassManagerBuilder.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Transforms/IPO/PassManagerBuilder.cpp b/lib/Transforms/IPO/PassManagerBuilder.cpp
index ee315a3a496..a9a9f2eeceb 100644
--- a/lib/Transforms/IPO/PassManagerBuilder.cpp
+++ b/lib/Transforms/IPO/PassManagerBuilder.cpp
@@ -188,7 +188,7 @@ void PassManagerBuilder::populateModulePassManager(PassManagerBase &MPM) {
   MPM.add(createLoopIdiomPass());             // Recognize idioms like memset.
   MPM.add(createLoopDeletionPass());          // Delete dead loops
 
-  if (LoopVectorize)
+  if (LoopVectorize && OptLevel > 1)
     MPM.add(createLoopVectorizePass());
 
   if (!DisableUnrollLoops)
-- 
2.34.1