From: Yi Jiang <yjiang@apple.com>
Date: Tue, 24 Sep 2013 17:26:43 +0000 (+0000)
Subject: set the cost of tiny trees to INT_MAX in SLP vectorizer to disable vectorization... 
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=085e23841e9c4f4682385fce456704a5f75f9cdc;p=oota-llvm.git

set the cost of tiny trees to INT_MAX in SLP vectorizer to disable vectorization on them

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191314 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Vectorize/SLPVectorizer.cpp b/lib/Transforms/Vectorize/SLPVectorizer.cpp
index b0c4894d358..b8e57de53be 100644
--- a/lib/Transforms/Vectorize/SLPVectorizer.cpp
+++ b/lib/Transforms/Vectorize/SLPVectorizer.cpp
@@ -947,7 +947,7 @@ int BoUpSLP::getTreeCost() {
     if (!VectorizableTree.size()) {
       assert(!ExternalUses.size() && "We should not have any external users");
     }
-    return 0;
+    return INT_MAX;
   }
 
   unsigned BundleWidth = VectorizableTree[0].Scalars.size();