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-rw-r--r--llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index dda4f0176b1..d6d1591ef03 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -10156,7 +10156,7 @@ SDValue DAGCombiner::visitBITCAST(SDNode *N) {
// float vectors bitcast to integer vectors) into shuffles.
// bitcast(shuffle(bitcast(s0),bitcast(s1))) -> shuffle(s0,s1)
if (Level < AfterLegalizeDAG && TLI.isTypeLegal(VT) && VT.isVector() &&
- N0->getOpcode() == ISD::VECTOR_SHUFFLE &&
+ N0->getOpcode() == ISD::VECTOR_SHUFFLE && N0.hasOneUse() &&
VT.getVectorNumElements() >= N0.getValueType().getVectorNumElements() &&
!(VT.getVectorNumElements() % N0.getValueType().getVectorNumElements())) {
ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(N0);
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