SystemZFrameLowering.h revision 280031
1251607Sdim//===-- SystemZFrameLowering.h - Frame lowering for SystemZ -----*- C++ -*-===// 2251607Sdim// 3251607Sdim// The LLVM Compiler Infrastructure 4251607Sdim// 5251607Sdim// This file is distributed under the University of Illinois Open Source 6251607Sdim// License. See LICENSE.TXT for details. 7251607Sdim// 8251607Sdim//===----------------------------------------------------------------------===// 9251607Sdim 10280031Sdim#ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZFRAMELOWERING_H 11280031Sdim#define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZFRAMELOWERING_H 12251607Sdim 13251607Sdim#include "llvm/ADT/IndexedMap.h" 14251607Sdim#include "llvm/Target/TargetFrameLowering.h" 15251607Sdim 16251607Sdimnamespace llvm { 17251607Sdimclass SystemZTargetMachine; 18251607Sdimclass SystemZSubtarget; 19251607Sdim 20251607Sdimclass SystemZFrameLowering : public TargetFrameLowering { 21251607Sdim IndexedMap<unsigned> RegSpillOffsets; 22251607Sdim 23251607Sdimpublic: 24276479Sdim SystemZFrameLowering(); 25251607Sdim 26261991Sdim // Override TargetFrameLowering. 27276479Sdim bool isFPCloseToIncomingSP() const override { return false; } 28276479Sdim const SpillSlot *getCalleeSavedSpillSlots(unsigned &NumEntries) const 29276479Sdim override; 30276479Sdim void processFunctionBeforeCalleeSavedScan(MachineFunction &MF, 31276479Sdim RegScavenger *RS) const override; 32276479Sdim bool spillCalleeSavedRegisters(MachineBasicBlock &MBB, 33276479Sdim MachineBasicBlock::iterator MBBI, 34276479Sdim const std::vector<CalleeSavedInfo> &CSI, 35276479Sdim const TargetRegisterInfo *TRI) const override; 36276479Sdim bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB, 37276479Sdim MachineBasicBlock::iterator MBBII, 38276479Sdim const std::vector<CalleeSavedInfo> &CSI, 39276479Sdim const TargetRegisterInfo *TRI) const 40276479Sdim override; 41276479Sdim void processFunctionBeforeFrameFinalized(MachineFunction &MF, 42276479Sdim RegScavenger *RS) const override; 43276479Sdim void emitPrologue(MachineFunction &MF) const override; 44276479Sdim void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override; 45276479Sdim bool hasFP(const MachineFunction &MF) const override; 46276479Sdim int getFrameIndexOffset(const MachineFunction &MF, int FI) const override; 47276479Sdim bool hasReservedCallFrame(const MachineFunction &MF) const override; 48276479Sdim void eliminateCallFramePseudoInstr(MachineFunction &MF, 49276479Sdim MachineBasicBlock &MBB, 50276479Sdim MachineBasicBlock::iterator MI) const 51276479Sdim override; 52251607Sdim 53251607Sdim // Return the number of bytes in the callee-allocated part of the frame. 54251607Sdim uint64_t getAllocatedStackSize(const MachineFunction &MF) const; 55251607Sdim 56251607Sdim // Return the byte offset from the incoming stack pointer of Reg's 57251607Sdim // ABI-defined save slot. Return 0 if no slot is defined for Reg. 58251607Sdim unsigned getRegSpillOffset(unsigned Reg) const { 59251607Sdim return RegSpillOffsets[Reg]; 60251607Sdim } 61251607Sdim}; 62251607Sdim} // end namespace llvm 63251607Sdim 64251607Sdim#endif 65