Fix buildbot failure on darwin from r235284.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235287 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Transforms/Utils/LoopUtils.h

@@ -66,6 +66,8 @@ public:
   bool isReduction() { return IsReduction; }
 
   MinMaxReductionKind getMinMaxKind() { return MinMaxKind; }
+ 
+  Instruction *getPatternInst() { return PatternLastInst; }
 
 private:
   // Is this instruction a reduction candidate.