Fixed a bug when trying to optimize a extract vector element of a
bit convert that changes the number of elements of a shuffle.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60829 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index aae4c59..9cc8061 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -4874,7 +4874,8 @@
MVT LVT = EVT;
if (InVec.getOpcode() == ISD::BIT_CONVERT) {
MVT BCVT = InVec.getOperand(0).getValueType();
- if (!BCVT.isVector() || EVT.bitsGT(BCVT.getVectorElementType()))
+ if (!BCVT.isVector() || EVT.bitsGT(BCVT.getVectorElementType()) ||
+ VT.getVectorNumElements() != BCVT.getVectorNumElements())
return SDValue();
InVec = InVec.getOperand(0);
EVT = BCVT.getVectorElementType();