================
@@ -7599,11 +7600,20 @@ MachineInstr *X86InstrInfo::foldMemoryOperandImpl(
const TargetRegisterClass &RC = *MF.getRegInfo().getRegClass(SrcReg);
Register NewSrc = MF.getRegInfo().createVirtualRegister(&RC);
- BuildMI(*NewMI->getParent(), *NewMI, MI.getDebugLoc(),
- get(TargetOpcode::COPY))
- .addReg(NewSrc, RegState::Define)
- .addReg(SrcReg);
+ MachineInstr *Copy = BuildMI(*NewMI->getParent(), *NewMI,
+ MI.getDebugLoc(), get(TargetOpcode::COPY))
+ .addReg(NewSrc, RegState::Define)
+ .addReg(SrcReg);
NewMI->getOperand(1).setReg(NewSrc);
+
+ if (LIS) {
+ SlotIndex CopyIdx = LIS->InsertMachineInstrInMaps(*Copy);
+ SlotIndex Idx = LIS->getInstructionIndex(MI);
+ LiveInterval &LI = LIS->getInterval(SrcReg);
+ LiveRange::Segment *S = LI.getSegmentContaining(Idx);
----------------
KanRobert wrote:
Is it possible the SrcReg is killed in this instrruction so that the
`getSegmentContaining` returns nullptr?
https://github.com/llvm/llvm-project/pull/191102
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