Fix a crash in EvaluateInDifferentElementOrder where it would generate an

undef vector of the wrong type.

LGTM'd by Nick Lewycky on IRC.

llvm-svn: 186224

1 files changed, 3 insertions, 1 deletions

diff --git a/llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp b/llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
index d43093d8316..f3de6e2d5c3 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
@@ -732,7 +732,9 @@ InstCombiner::EvaluateInDifferentElementOrder(Value *V, ArrayRef<int> Mask) {
       }
 
       if (!Found)
-        return UndefValue::get(I->getType());
+        return UndefValue::get(
+            VectorType::get(V->getType()->getScalarType(), Mask.size()));
+
       Value *V = EvaluateInDifferentElementOrder(I->getOperand(0), Mask);
       return InsertElementInst::Create(V, I->getOperand(1),
                                        Builder->getInt32(Index), "", I);