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[DAG] TargetLowering::ShrinkDemandedOp - pull out repeated getValueType calls. NFC

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This commit is contained in:
Simon Pilgrim 2023-03-16 11:57:29 +00:00
parent 1f5fdc22a2
commit 7aa7393aab
1 changed files with 4 additions and 4 deletions
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8
llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
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@ -559,11 +559,12 @@ bool TargetLowering::ShrinkDemandedOp(SDValue Op, unsigned BitWidth,
assert(Op.getNode()->getNumValues() == 1 &&
"ShrinkDemandedOp only supports nodes with one result!");
EVT VT = Op.getValueType();
SelectionDAG &DAG = TLO.DAG;
SDLoc dl(Op);
// Early return, as this function cannot handle vector types.
if (Op.getValueType().isVector())
if (VT.isVector())
return false;
// Don't do this if the node has another user, which may require the
@ -579,15 +580,14 @@ bool TargetLowering::ShrinkDemandedOp(SDValue Op, unsigned BitWidth,
SmallVTBits = llvm::bit_ceil(SmallVTBits);
for (; SmallVTBits < BitWidth; SmallVTBits = NextPowerOf2(SmallVTBits)) {
EVT SmallVT = EVT::getIntegerVT(*DAG.getContext(), SmallVTBits);
if (TLI.isTruncateFree(Op.getValueType(), SmallVT) &&
TLI.isZExtFree(SmallVT, Op.getValueType())) {
if (TLI.isTruncateFree(VT, SmallVT) && TLI.isZExtFree(SmallVT, VT)) {
// We found a type with free casts.
SDValue X = DAG.getNode(
Op.getOpcode(), dl, SmallVT,
DAG.getNode(ISD::TRUNCATE, dl, SmallVT, Op.getOperand(0)),
DAG.getNode(ISD::TRUNCATE, dl, SmallVT, Op.getOperand(1)));
assert(DemandedSize <= SmallVTBits && "Narrowed below demanded bits?");
SDValue Z = DAG.getNode(ISD::ANY_EXTEND, dl, Op.getValueType(), X);
SDValue Z = DAG.getNode(ISD::ANY_EXTEND, dl, VT, X);
return TLO.CombineTo(Op, Z);
}
}