diff options
Diffstat (limited to 'llvm/lib/Target/Mips/Mips16FrameLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/Mips/Mips16FrameLowering.cpp | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/llvm/lib/Target/Mips/Mips16FrameLowering.cpp b/llvm/lib/Target/Mips/Mips16FrameLowering.cpp index 6655ff98e03..ae6be05cdfb 100644 --- a/llvm/lib/Target/Mips/Mips16FrameLowering.cpp +++ b/llvm/lib/Target/Mips/Mips16FrameLowering.cpp @@ -15,6 +15,7 @@ #include "MCTargetDesc/MipsBaseInfo.h" #include "Mips16InstrInfo.h" #include "MipsInstrInfo.h" +#include "MipsRegisterInfo.h" #include "llvm/CodeGen/MachineFrameInfo.h" #include "llvm/CodeGen/MachineFunction.h" #include "llvm/CodeGen/MachineInstrBuilder.h" @@ -56,17 +57,31 @@ void Mips16FrameLowering::emitPrologue(MachineFunction &MF) const { MCSymbol *CSLabel = MMI.getContext().CreateTempSymbol(); BuildMI(MBB, MBBI, dl, TII.get(TargetOpcode::PROLOG_LABEL)).addSym(CSLabel); - unsigned S2 = MRI->getDwarfRegNum(Mips::S2, true); - MMI.addFrameInst(MCCFIInstruction::createOffset(CSLabel, S2, -8)); + + + const MipsRegisterInfo &RI = TII.getRegisterInfo(); + const BitVector Reserved = RI.getReservedRegs(MF); + bool SaveS2 = Reserved[Mips::S2]; + int Offset=-4; + unsigned RA = MRI->getDwarfRegNum(Mips::RA, true); + MMI.addFrameInst(MCCFIInstruction::createOffset(CSLabel, RA, Offset)); + Offset -= 4; + + if (SaveS2) { + unsigned S2 = MRI->getDwarfRegNum(Mips::S2, true); + MMI.addFrameInst(MCCFIInstruction::createOffset(CSLabel, S2, Offset)); + Offset -= 4; + } + unsigned S1 = MRI->getDwarfRegNum(Mips::S1, true); - MMI.addFrameInst(MCCFIInstruction::createOffset(CSLabel, S1, -12)); + MMI.addFrameInst(MCCFIInstruction::createOffset(CSLabel, S1, Offset)); + Offset -= 4; unsigned S0 = MRI->getDwarfRegNum(Mips::S0, true); - MMI.addFrameInst(MCCFIInstruction::createOffset(CSLabel, S0, -16)); + MMI.addFrameInst(MCCFIInstruction::createOffset(CSLabel, S0, Offset)); + - unsigned RA = MRI->getDwarfRegNum(Mips::RA, true); - MMI.addFrameInst(MCCFIInstruction::createOffset(CSLabel, RA, -4)); if (hasFP(MF)) BuildMI(MBB, MBBI, dl, TII.get(Mips::MoveR3216), Mips::S0) |
