//===-- SystemZFrameLowering.h - Frame lowering for SystemZ -----*- C++ -*-===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// #ifndef SYSTEMZFRAMELOWERING_H #define SYSTEMZFRAMELOWERING_H #include "llvm/ADT/IndexedMap.h" #include "llvm/Target/TargetFrameLowering.h" namespace llvm { class SystemZTargetMachine; class SystemZSubtarget; class SystemZFrameLowering : public TargetFrameLowering { IndexedMap<unsigned> RegSpillOffsets; public: SystemZFrameLowering(); // Override TargetFrameLowering. bool isFPCloseToIncomingSP() const override { return false; } const SpillSlot *getCalleeSavedSpillSlots(unsigned &NumEntries) const override; void processFunctionBeforeCalleeSavedScan(MachineFunction &MF, RegScavenger *RS) const override; bool spillCalleeSavedRegisters(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, const std::vector<CalleeSavedInfo> &CSI, const TargetRegisterInfo *TRI) const override; bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBII, const std::vector<CalleeSavedInfo> &CSI, const TargetRegisterInfo *TRI) const override; void processFunctionBeforeFrameFinalized(MachineFunction &MF, RegScavenger *RS) const override; void emitPrologue(MachineFunction &MF) const override; void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override; bool hasFP(const MachineFunction &MF) const override; int getFrameIndexOffset(const MachineFunction &MF, int FI) const override; bool hasReservedCallFrame(const MachineFunction &MF) const override; void eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator MI) const override; // Return the number of bytes in the callee-allocated part of the frame. uint64_t getAllocatedStackSize(const MachineFunction &MF) const; // Return the byte offset from the incoming stack pointer of Reg's // ABI-defined save slot. Return 0 if no slot is defined for Reg. unsigned getRegSpillOffset(unsigned Reg) const { return RegSpillOffsets[Reg]; } }; } // end namespace llvm #endif