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[RISCV] Fold vector shift of sext/zext to widening multiply #121563

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[RISCV] Fold vector shift of sext/zext to widening multiply #121563

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15412e7
[RISCV] Fold vector shift of sext/zext to widening multiply
pfusik Jan 3, 2025
5aa9da4
[RISCV] Fold vector shift to widening multiply on rv32
pfusik Jan 8, 2025
1868507
[RISCV] Use `getSimpleValueType`
pfusik Jan 8, 2025
3a59255
[RISCV] Add a TODO comment
pfusik Jan 8, 2025
174e59e
[RISCV] Handle fixed-length vectors
pfusik Jan 9, 2025
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[RISCV] Add a TODO comment
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@pfusik
pfusik committed Jan 8, 2025
commit 3a59255be01ab61daca0274958face9efba45596
2 changes: 1 addition & 1 deletion llvm/lib/Target/RISCV/RISCVISelLowering.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -17399,7 +17399,7 @@ static SDValue combineSHL(SDNode *N, TargetLowering::DAGCombinerInfo &DCI,
switch (N->getOpcode()) {
case ISD::SHL:
if (!VT.isScalableVector())
return SDValue();
return SDValue(); // TODO: handle fixed length vectors
Passthru = DAG.getUNDEF(VT);
std::tie(Mask, VL) =
getDefaultScalableVLOps(VT.getSimpleVT(), DL, DAG, Subtarget);
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