SLPVectorizer: Improve the cost model for loop invariant broadcast values.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179930 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Vectorize/SLPVectorizer.cpp

@@ -83,7 +83,7 @@ struct SLPVectorizer : public FunctionPass {
 
       // Use the bollom up slp vectorizer to construct chains that start with
       // he store instructions.
-      BoUpSLP R(BB, SE, DL, TTI, AA);
+      BoUpSLP R(BB, SE, DL, TTI, AA, LI->getLoopFor(BB));
 
       // Vectorize trees that end at reductions.
       BBChanged |= vectorizeReductions(BB, R);