SparcFrameLowering.h revision dce4a407a24b04eebc6a376f8e62b41aaa7b071f
1//===-- SparcFrameLowering.h - Define frame lowering for Sparc --*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef SPARC_FRAMEINFO_H 15#define SPARC_FRAMEINFO_H 16 17#include "Sparc.h" 18#include "SparcSubtarget.h" 19#include "llvm/Target/TargetFrameLowering.h" 20 21namespace llvm { 22 class SparcSubtarget; 23 24class SparcFrameLowering : public TargetFrameLowering { 25 const SparcSubtarget &SubTarget; 26public: 27 explicit SparcFrameLowering(const SparcSubtarget &ST) 28 : TargetFrameLowering(TargetFrameLowering::StackGrowsDown, 29 ST.is64Bit() ? 16 : 8, 0, ST.is64Bit() ? 16 : 8), 30 SubTarget(ST) {} 31 32 /// emitProlog/emitEpilog - These methods insert prolog and epilog code into 33 /// the function. 34 void emitPrologue(MachineFunction &MF) const override; 35 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override; 36 37 void 38 eliminateCallFramePseudoInstr(MachineFunction &MF, 39 MachineBasicBlock &MBB, 40 MachineBasicBlock::iterator I) const override; 41 42 bool hasReservedCallFrame(const MachineFunction &MF) const override; 43 bool hasFP(const MachineFunction &MF) const override; 44 void processFunctionBeforeCalleeSavedScan(MachineFunction &MF, 45 RegScavenger *RS = nullptr) const override; 46 47private: 48 // Remap input registers to output registers for leaf procedure. 49 void remapRegsForLeafProc(MachineFunction &MF) const; 50 51 // Returns true if MF is a leaf procedure. 52 bool isLeafProc(MachineFunction &MF) const; 53 54 55 // Emits code for adjusting SP in function prologue/epilogue. 56 void emitSPAdjustment(MachineFunction &MF, 57 MachineBasicBlock &MBB, 58 MachineBasicBlock::iterator MBBI, 59 int NumBytes, unsigned ADDrr, unsigned ADDri) const; 60 61}; 62 63} // End llvm namespace 64 65#endif 66