<div dir="ltr">Test case? Justification? This seems somewhat arbitrary given the commit log.</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Sep 24, 2013 at 12:26 PM, Yi Jiang <span dir="ltr"><<a href="mailto:yjiang@apple.com" target="_blank">yjiang@apple.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Author: yjiang<br>
Date: Tue Sep 24 12:26:43 2013<br>
New Revision: 191314<br>
<br>
URL: <a href="http://llvm.org/viewvc/llvm-project?rev=191314&view=rev" target="_blank">http://llvm.org/viewvc/llvm-project?rev=191314&view=rev</a><br>
Log:<br>
set the cost of tiny trees to INT_MAX in SLP vectorizer to disable vectorization on them<br>
<br>
Modified:<br>
    llvm/trunk/lib/Transforms/Vectorize/SLPVectorizer.cpp<br>
<br>
Modified: llvm/trunk/lib/Transforms/Vectorize/SLPVectorizer.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Vectorize/SLPVectorizer.cpp?rev=191314&r1=191313&r2=191314&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Vectorize/SLPVectorizer.cpp?rev=191314&r1=191313&r2=191314&view=diff</a><br>

==============================================================================<br>
--- llvm/trunk/lib/Transforms/Vectorize/SLPVectorizer.cpp (original)<br>
+++ llvm/trunk/lib/Transforms/Vectorize/SLPVectorizer.cpp Tue Sep 24 12:26:43 2013<br>
@@ -947,7 +947,7 @@ int BoUpSLP::getTreeCost() {<br>
     if (!VectorizableTree.size()) {<br>
       assert(!ExternalUses.size() && "We should not have any external users");<br>
     }<br>
-    return 0;<br>
+    return INT_MAX;<br>
   }<br>
<br>
   unsigned BundleWidth = VectorizableTree[0].Scalars.size();<br>
<br>
<br>
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</blockquote></div><br></div>