[SLP]Fix write after bounds.

Need to use comma instead of + symbol to prevent writing after bounds.

diff --git a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
index 8a44c4d..f874cfc 100644 (file)
--- a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
+++ b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
@@ -4020,7 +4020,7 @@ void BoUpSLP::reorderNodeWithReuses(TreeEntry &TE, ArrayRef<int> Mask) const {
   for (auto *It = TE.ReuseShuffleIndices.begin(),
             *End = TE.ReuseShuffleIndices.end();
        It != End; std::advance(It, Sz))
-    std::iota(It, std::next(It + Sz), 0);
+    std::iota(It, std::next(It, Sz), 0);
 }
 
 void BoUpSLP::reorderTopToBottom() {