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[SVE] Update INSERT_SUBVECTOR DAGCombine to use getVectorElementCount(). 

A small piece of the project to replace getVectorNumElements() with getVectorElementCount().

Differential Revision: https://reviews.llvm.org/D86894
This commit is contained in:
Cameron McInally 2020-09-01 16:24:53 -05:00
parent 478eb98cd2
commit cfe2b81710
2 changed files with 6 additions and 2 deletions
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4
llvm/include/llvm/Support/TypeSize.h
View File

@ -79,6 +79,10 @@ public:
return {(unsigned)llvm::NextPowerOf2(Min), Scalable};
}
bool isKnownMultipleOf(unsigned RHS) const {
return Min % RHS == 0;
}
static ElementCount getFixed(unsigned Min) { return {Min, false}; }
static ElementCount getScalable(unsigned Min) { return {Min, true}; }
static ElementCount get(unsigned Min, bool Scalable) {

4
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
View File

@ -20620,7 +20620,7 @@ SDValue DAGCombiner::visitINSERT_SUBVECTOR(SDNode *N) {
SDLoc DL(N);
SDValue NewIdx;
LLVMContext &Ctx = *DAG.getContext();
unsigned NumElts = VT.getVectorNumElements();
ElementCount NumElts = VT.getVectorElementCount();
unsigned EltSizeInBits = VT.getScalarSizeInBits();
if ((EltSizeInBits % N1SrcSVT.getSizeInBits()) == 0) {
unsigned Scale = EltSizeInBits / N1SrcSVT.getSizeInBits();
@ -20628,7 +20628,7 @@ SDValue DAGCombiner::visitINSERT_SUBVECTOR(SDNode *N) {
NewIdx = DAG.getVectorIdxConstant(InsIdx * Scale, DL);
} else if ((N1SrcSVT.getSizeInBits() % EltSizeInBits) == 0) {
unsigned Scale = N1SrcSVT.getSizeInBits() / EltSizeInBits;
if ((NumElts % Scale) == 0 && (InsIdx % Scale) == 0) {
if (NumElts.isKnownMultipleOf(Scale) && (InsIdx % Scale) == 0) {
NewVT = EVT::getVectorVT(Ctx, N1SrcSVT, NumElts / Scale);
NewIdx = DAG.getVectorIdxConstant(InsIdx / Scale, DL);
}