| //===-- SystemZFrameLowering.h - Frame lowering for SystemZ -----*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZFRAMELOWERING_H |
| #define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZFRAMELOWERING_H |
| |
| #include "llvm/ADT/IndexedMap.h" |
| #include "llvm/CodeGen/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 determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs, |
| 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, |
| std::vector<CalleeSavedInfo> &CSI, |
| const TargetRegisterInfo *TRI) const |
| override; |
| void processFunctionBeforeFrameFinalized(MachineFunction &MF, |
| RegScavenger *RS) 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 hasReservedCallFrame(const MachineFunction &MF) const override; |
| MachineBasicBlock::iterator |
| eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, |
| MachineBasicBlock::iterator MI) const override; |
| |
| // 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 |