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[RISCV] Rematerialize vmv.s.x and vfmv.s.f #108012

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Merged
merged 2 commits into from
Sep 11, 2024
Merged

[RISCV] Rematerialize vmv.s.x and vfmv.s.f #108012

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e608957
Precommit tests
lukel97 Sep 10, 2024
176055a
[RISCV] Rematerialize vmv.s.x and vfmv.s.f
lukel97 Sep 10, 2024
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2 changes: 2 additions & 0 deletions llvm/lib/Target/RISCV/RISCVInstrInfo.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -172,6 +172,8 @@ bool RISCVInstrInfo::isReallyTriviallyReMaterializable(
case RISCV::VMV_V_X:
case RISCV::VFMV_V_F:
case RISCV::VMV_V_I:
case RISCV::VMV_S_X:
case RISCV::VFMV_S_F:
case RISCV::VID_V:
if (MI.getOperand(1).isUndef() &&
/* After RISCVInsertVSETVLI most pseudos will have implicit uses on vl
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4 changes: 2 additions & 2 deletions llvm/lib/Target/RISCV/RISCVInstrInfoVPseudos.td
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Expand Up @@ -6764,7 +6764,7 @@ let mayLoad = 0, mayStore = 0, hasSideEffects = 0 in {
Pseudo<(outs GPR:$rd), (ins VR:$rs2, ixlenimm:$sew), []>,
Sched<[WriteVMovXS, ReadVMovXS]>,
RISCVVPseudo;
let HasVLOp = 1, HasSEWOp = 1, BaseInstr = VMV_S_X,
let HasVLOp = 1, HasSEWOp = 1, BaseInstr = VMV_S_X, isReMaterializable = 1,
Constraints = "$rd = $rs1" in
def PseudoVMV_S_X: Pseudo<(outs VR:$rd),
(ins VR:$rs1, GPR:$rs2, AVL:$vl, ixlenimm:$sew),
Expand All @@ -6787,7 +6787,7 @@ let mayLoad = 0, mayStore = 0, hasSideEffects = 0 in {
(ins VR:$rs2, ixlenimm:$sew), []>,
Sched<[WriteVMovFS, ReadVMovFS]>,
RISCVVPseudo;
let HasVLOp = 1, HasSEWOp = 1, BaseInstr = VFMV_S_F,
let HasVLOp = 1, HasSEWOp = 1, BaseInstr = VFMV_S_F, isReMaterializable = 1,
Constraints = "$rd = $rs1" in
def "PseudoVFMV_S_" # f.FX :
Pseudo<(outs VR:$rd),
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