Only enable SLP-vectorization on O3 builds.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187595 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/IPO/PassManagerBuilder.cpp b/lib/Transforms/IPO/PassManagerBuilder.cpp
index 6355204a03e240cff9559b7f97f9e807eba3945e..5363c91cc84e0163f803e2b1dea534ceac3ebbbd 100644 (file)
--- a/lib/Transforms/IPO/PassManagerBuilder.cpp
+++ b/lib/Transforms/IPO/PassManagerBuilder.cpp
@@ -217,7 +217,7 @@ void PassManagerBuilder::populateModulePassManager(PassManagerBase &MPM) {
   addExtensionsToPM(EP_ScalarOptimizerLate, MPM);
 
   if (!LateVectorize) {
-    if (SLPVectorize)
+    if (SLPVectorize && OptLevel > 2)
       MPM.add(createSLPVectorizerPass());   // Vectorize parallel scalar chains.
 
     if (BBVectorize) {