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[Mips] Use APInt::isMask/isShiftedMask to simplify code. #116582

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Merged
merged 1 commit into from
Nov 18, 2024
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[Mips] Use APInt::isMask/isShiftedMask to simplify code. #116582

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12 changes: 4 additions & 8 deletions llvm/lib/Target/Mips/MipsSEISelDAGToDAG.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -614,11 +614,9 @@ bool MipsSEDAGToDAGISel::selectVSplatMaskL(SDValue N, SDValue &Imm) const {

if (selectVSplat(N.getNode(), ImmValue, EltTy.getSizeInBits()) &&
ImmValue.getBitWidth() == EltTy.getSizeInBits()) {
// Extract the run of set bits starting with bit zero from the bitwise
// inverse of ImmValue, and test that the inverse of this is the same
// as the original value.
if (ImmValue == ~(~ImmValue & ~(~ImmValue + 1))) {

// Check if we have a leading one, then check if the whole value is a
// shifted mask.
if (ImmValue.isNegative() && ImmValue.isShiftedMask()) {
Imm = CurDAG->getTargetConstant(ImmValue.popcount() - 1, SDLoc(N), EltTy);
return true;
}
Expand Down Expand Up @@ -647,9 +645,7 @@ bool MipsSEDAGToDAGISel::selectVSplatMaskR(SDValue N, SDValue &Imm) const {

if (selectVSplat(N.getNode(), ImmValue, EltTy.getSizeInBits()) &&
ImmValue.getBitWidth() == EltTy.getSizeInBits()) {
// Extract the run of set bits starting with bit zero, and test that the
// result is the same as the original value
if (ImmValue == (ImmValue & ~(ImmValue + 1))) {
if (ImmValue.isMask()) {
Imm = CurDAG->getTargetConstant(ImmValue.popcount() - 1, SDLoc(N), EltTy);
return true;
}
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