1*0b57cec5SDimitry Andric //===-- SystemZFrameLowering.h - Frame lowering for SystemZ -----*- C++ -*-===// 2*0b57cec5SDimitry Andric // 3*0b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*0b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*0b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*0b57cec5SDimitry Andric // 7*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 8*0b57cec5SDimitry Andric 9*0b57cec5SDimitry Andric #ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZFRAMELOWERING_H 10*0b57cec5SDimitry Andric #define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZFRAMELOWERING_H 11*0b57cec5SDimitry Andric 12*0b57cec5SDimitry Andric #include "llvm/ADT/IndexedMap.h" 13*0b57cec5SDimitry Andric #include "llvm/CodeGen/TargetFrameLowering.h" 14*0b57cec5SDimitry Andric 15*0b57cec5SDimitry Andric namespace llvm { 16*0b57cec5SDimitry Andric class SystemZTargetMachine; 17*0b57cec5SDimitry Andric class SystemZSubtarget; 18*0b57cec5SDimitry Andric 19*0b57cec5SDimitry Andric class SystemZFrameLowering : public TargetFrameLowering { 20*0b57cec5SDimitry Andric IndexedMap<unsigned> RegSpillOffsets; 21*0b57cec5SDimitry Andric 22*0b57cec5SDimitry Andric public: 23*0b57cec5SDimitry Andric SystemZFrameLowering(); 24*0b57cec5SDimitry Andric 25*0b57cec5SDimitry Andric // Override TargetFrameLowering. 26*0b57cec5SDimitry Andric bool isFPCloseToIncomingSP() const override { return false; } 27*0b57cec5SDimitry Andric const SpillSlot *getCalleeSavedSpillSlots(unsigned &NumEntries) const 28*0b57cec5SDimitry Andric override; 29*0b57cec5SDimitry Andric void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs, 30*0b57cec5SDimitry Andric RegScavenger *RS) const override; 31*0b57cec5SDimitry Andric bool spillCalleeSavedRegisters(MachineBasicBlock &MBB, 32*0b57cec5SDimitry Andric MachineBasicBlock::iterator MBBI, 33*0b57cec5SDimitry Andric const std::vector<CalleeSavedInfo> &CSI, 34*0b57cec5SDimitry Andric const TargetRegisterInfo *TRI) const override; 35*0b57cec5SDimitry Andric bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB, 36*0b57cec5SDimitry Andric MachineBasicBlock::iterator MBBII, 37*0b57cec5SDimitry Andric std::vector<CalleeSavedInfo> &CSI, 38*0b57cec5SDimitry Andric const TargetRegisterInfo *TRI) const 39*0b57cec5SDimitry Andric override; 40*0b57cec5SDimitry Andric void processFunctionBeforeFrameFinalized(MachineFunction &MF, 41*0b57cec5SDimitry Andric RegScavenger *RS) const override; 42*0b57cec5SDimitry Andric void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override; 43*0b57cec5SDimitry Andric void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override; 44*0b57cec5SDimitry Andric bool hasFP(const MachineFunction &MF) const override; 45*0b57cec5SDimitry Andric bool hasReservedCallFrame(const MachineFunction &MF) const override; 46*0b57cec5SDimitry Andric MachineBasicBlock::iterator 47*0b57cec5SDimitry Andric eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, 48*0b57cec5SDimitry Andric MachineBasicBlock::iterator MI) const override; 49*0b57cec5SDimitry Andric 50*0b57cec5SDimitry Andric // Return the byte offset from the incoming stack pointer of Reg's 51*0b57cec5SDimitry Andric // ABI-defined save slot. Return 0 if no slot is defined for Reg. 52*0b57cec5SDimitry Andric unsigned getRegSpillOffset(unsigned Reg) const { 53*0b57cec5SDimitry Andric return RegSpillOffsets[Reg]; 54*0b57cec5SDimitry Andric } 55*0b57cec5SDimitry Andric }; 56*0b57cec5SDimitry Andric } // end namespace llvm 57*0b57cec5SDimitry Andric 58*0b57cec5SDimitry Andric #endif 59