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[SelectionDAG] In SplitVecOp_EXTRACT_VECTOR_ELT, simplify the code that makes the type byte addressable.

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We can just extend the original vector to vXi1 and trust that the legalization process will revisit it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@320013 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Craig Topper 2017-12-07 08:04:34 +00:00
parent 608221f7aa
commit ff096475db
1 changed files with 2 additions and 11 deletions
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13
lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
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@ -1749,20 +1749,11 @@ SDValue DAGTypeLegalizer::SplitVecOp_EXTRACT_VECTOR_ELT(SDNode *N) {
// Make the vector elements byte-addressable if they aren't already.
SDLoc dl(N);
EVT EltVT = VecVT.getVectorElementType();
if (EltVT.getSizeInBits() < 8) {
SmallVector<SDValue, 4> ElementOps;
for (unsigned i = 0; i < VecVT.getVectorNumElements(); ++i) {
ElementOps.push_back(DAG.getAnyExtOrTrunc(
DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT, Vec,
DAG.getConstant(i, dl,
TLI.getVectorIdxTy(DAG.getDataLayout()))),
dl, MVT::i8));
}
if (VecVT.getScalarSizeInBits() < 8) {
EltVT = MVT::i8;
VecVT = EVT::getVectorVT(*DAG.getContext(), EltVT,
VecVT.getVectorNumElements());
Vec = DAG.getBuildVector(VecVT, dl, ElementOps);
Vec = DAG.getNode(ISD::ANY_EXTEND, dl, VecVT, Vec);
}
// Store the vector to the stack.