diff options
Diffstat (limited to 'contrib/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp')
| -rw-r--r-- | contrib/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/contrib/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp b/contrib/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp index ec7bf31..096b3be 100644 --- a/contrib/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp +++ b/contrib/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp @@ -621,10 +621,17 @@ MipsSEFrameLowering::hasReservedCallFrame(const MachineFunction &MF) const { !MFI->hasVarSizedObjects(); } -void MipsSEFrameLowering:: -processFunctionBeforeCalleeSavedScan(MachineFunction &MF, - RegScavenger *RS) const { - MachineRegisterInfo &MRI = MF.getRegInfo(); +/// Mark \p Reg and all registers aliasing it in the bitset. +void setAliasRegs(MachineFunction &MF, BitVector &SavedRegs, unsigned Reg) { + const TargetRegisterInfo *TRI = MF.getSubtarget().getRegisterInfo(); + for (MCRegAliasIterator AI(Reg, TRI, true); AI.isValid(); ++AI) + SavedRegs.set(*AI); +} + +void MipsSEFrameLowering::determineCalleeSaves(MachineFunction &MF, + BitVector &SavedRegs, + RegScavenger *RS) const { + TargetFrameLowering::determineCalleeSaves(MF, SavedRegs, RS); MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>(); MipsABIInfo ABI = STI.getABI(); unsigned FP = ABI.GetFramePtr(); @@ -632,10 +639,10 @@ processFunctionBeforeCalleeSavedScan(MachineFunction &MF, // Mark $fp as used if function has dedicated frame pointer. if (hasFP(MF)) - MRI.setPhysRegUsed(FP); + setAliasRegs(MF, SavedRegs, FP); // Mark $s7 as used if function has dedicated base pointer. if (hasBP(MF)) - MRI.setPhysRegUsed(BP); + setAliasRegs(MF, SavedRegs, BP); // Create spill slots for eh data registers if function calls eh_return. if (MipsFI->callsEhReturn()) |
