diff options
Diffstat (limited to 'llvm/lib/Target/AArch64/AArch64InstrInfo.cpp')
| -rw-r--r-- | llvm/lib/Target/AArch64/AArch64InstrInfo.cpp | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp b/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp index 0164905a3e0..585524ebbf2 100644 --- a/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp +++ b/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp @@ -5282,6 +5282,25 @@ void AArch64InstrInfo::insertOutlinerEpilogue( .addImm(-16); It = MBB.insert(It, STRXpre); + const TargetSubtargetInfo &STI = MF.getSubtarget(); + const MCRegisterInfo *MRI = STI.getRegisterInfo(); + unsigned DwarfReg = MRI->getDwarfRegNum(AArch64::LR, true); + + // Add a CFI saying the stack was moved 16 B down. + int64_t StackPosEntry = + MF.addFrameInst(MCCFIInstruction::createDefCfaOffset(nullptr, 16)); + BuildMI(MBB, It, DebugLoc(), get(AArch64::CFI_INSTRUCTION)) + .addCFIIndex(StackPosEntry) + .setMIFlags(MachineInstr::FrameSetup); + + // Add a CFI saying that the LR that we want to find is now 16 B higher than + // before. + int64_t LRPosEntry = + MF.addFrameInst(MCCFIInstruction::createOffset(nullptr, DwarfReg, 16)); + BuildMI(MBB, It, DebugLoc(), get(AArch64::CFI_INSTRUCTION)) + .addCFIIndex(LRPosEntry) + .setMIFlags(MachineInstr::FrameSetup); + // Insert a restore before the terminator for the function. MachineInstr *LDRXpost = BuildMI(MF, DebugLoc(), get(AArch64::LDRXpost)) .addReg(AArch64::SP, RegState::Define) |
