const PPCSubtarget &Subtarget;
const unsigned ReturnSaveOffset;
const unsigned TOCSaveOffset;
+ const unsigned FramePointerSaveOffset;
+ const unsigned LinkageSize;
+ const unsigned BasePointerSaveOffset;
public:
PPCFrameLowering(const PPCSubtarget &STI);
/// emitProlog/emitEpilog - These methods insert prolog and epilog code into
/// the function.
- void emitPrologue(MachineFunction &MF) const override;
+ void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
bool hasFP(const MachineFunction &MF) const override;
bool needsFP(const MachineFunction &MF) const;
void replaceFPWithRealFP(MachineFunction &MF) const;
- void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
- RegScavenger *RS = nullptr) const override;
+ void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
+ RegScavenger *RS = nullptr) const override;
void processFunctionBeforeFrameFinalized(MachineFunction &MF,
RegScavenger *RS = nullptr) const override;
void addScavengingSpillSlot(MachineFunction &MF, RegScavenger *RS) const;
/// getFramePointerSaveOffset - Return the previous frame offset to save the
/// frame pointer.
- static unsigned getFramePointerSaveOffset(bool isPPC64, bool isDarwinABI) {
- // For the Darwin ABI:
- // We cannot use the TOC save slot (offset +20) in the PowerPC linkage area
- // for saving the frame pointer (if needed.) While the published ABI has
- // not used this slot since at least MacOSX 10.2, there is older code
- // around that does use it, and that needs to continue to work.
- if (isDarwinABI)
- return isPPC64 ? -8U : -4U;
-
- // SVR4 ABI: First slot in the general register save area.
- return isPPC64 ? -8U : -4U;
- }
+ unsigned getFramePointerSaveOffset() const { return FramePointerSaveOffset; }
/// getBasePointerSaveOffset - Return the previous frame offset to save the
/// base pointer.
- static unsigned getBasePointerSaveOffset(bool isPPC64,
- bool isDarwinABI,
- bool isPIC) {
- if (isDarwinABI)
- return isPPC64 ? -16U : -8U;
-
- // SVR4 ABI: First slot in the general register save area.
- return isPPC64 ? -16U : isPIC ? -12U : -8U;
- }
+ unsigned getBasePointerSaveOffset() const { return BasePointerSaveOffset; }
/// getLinkageSize - Return the size of the PowerPC ABI linkage area.
///
- static unsigned getLinkageSize(bool isPPC64, bool isDarwinABI,
- bool isELFv2ABI) {
- if (isDarwinABI || isPPC64)
- return (isELFv2ABI ? 4 : 6) * (isPPC64 ? 8 : 4);
-
- // SVR4 ABI:
- return 8;
- }
+ unsigned getLinkageSize() const { return LinkageSize; }
const SpillSlot *
getCalleeSavedSpillSlots(unsigned &NumEntries) const override;