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Fix the usage issue of getRegMask. #141215

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Fix the usage issue of getRegMask. #141215

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ad8cc68
Fix the usage issue of getRegMask.
wdx727 May 23, 2025
3ba2612
Merge branch 'main' into fix_use_of_getRegMask
wdx727 Sep 15, 2025
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6 changes: 3 additions & 3 deletions llvm/lib/CodeGen/MachineOperand.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -350,8 +350,8 @@ bool MachineOperand::isIdenticalTo(const MachineOperand &Other) const {
case MachineOperand::MO_RegisterMask:
case MachineOperand::MO_RegisterLiveOut: {
// Shallow compare of the two RegMasks
const uint32_t *RegMask = getRegMask();
const uint32_t *OtherRegMask = Other.getRegMask();
const uint32_t *RegMask = isRegMask() ? getRegMask() : getRegLiveOut();
const uint32_t *OtherRegMask = isRegMask() ? Other.getRegMask() : Other.getRegLiveOut();
if (RegMask == OtherRegMask)
return true;

Expand Down Expand Up @@ -421,7 +421,7 @@ hash_code llvm::hash_value(const MachineOperand &MO) {
if (const MachineFunction *MF = getMFIfAvailable(MO)) {
const TargetRegisterInfo *TRI = MF->getSubtarget().getRegisterInfo();
unsigned RegMaskSize = MachineOperand::getRegMaskSize(TRI->getNumRegs());
const uint32_t *RegMask = MO.getRegMask();
const uint32_t *RegMask = MO.isRegMask() ? MO.getRegMask() : MO.getRegLiveOut();
std::vector<stable_hash> RegMaskHashes(RegMask, RegMask + RegMaskSize);
return hash_combine(MO.getType(), MO.getTargetFlags(),
stable_hash_combine(RegMaskHashes));
Expand Down
2 changes: 1 addition & 1 deletion llvm/lib/CodeGen/MachineStableHash.cpp
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Expand Up @@ -136,7 +136,7 @@ stable_hash llvm::stableHashValue(const MachineOperand &MO) {
const TargetRegisterInfo *TRI = MF->getSubtarget().getRegisterInfo();
unsigned RegMaskSize =
MachineOperand::getRegMaskSize(TRI->getNumRegs());
const uint32_t *RegMask = MO.getRegMask();
const uint32_t *RegMask = MO.isRegMask() ? MO.getRegMask() : MO.getRegLiveOut();
std::vector<llvm::stable_hash> RegMaskHashes(RegMask,
RegMask + RegMaskSize);
return stable_hash_combine(MO.getType(), MO.getTargetFlags(),
Expand Down