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 "llvm/Target/TargetFrameLowering.h" 19 20 namespace llvm { 21 22 class SparcSubtarget; 23 class SparcFrameLowering : public TargetFrameLowering { 24 public: 25 explicit SparcFrameLowering(const SparcSubtarget &ST); 26 27 /// emitProlog/emitEpilog - These methods insert prolog and epilog code into 28 /// the function. 29 void emitPrologue(MachineFunction &MF) const override; 30 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override; 31 32 void 33 eliminateCallFramePseudoInstr(MachineFunction &MF, 34 MachineBasicBlock &MBB, 35 MachineBasicBlock::iterator I) const override; 36 37 bool hasReservedCallFrame(const MachineFunction &MF) const override; 38 bool hasFP(const MachineFunction &MF) const override; 39 void processFunctionBeforeCalleeSavedScan(MachineFunction &MF, 40 RegScavenger *RS = nullptr) const override; 41 42 private: 43 // Remap input registers to output registers for leaf procedure. 44 void remapRegsForLeafProc(MachineFunction &MF) const; 45 46 // Returns true if MF is a leaf procedure. 47 bool isLeafProc(MachineFunction &MF) const; 48 49 50 // Emits code for adjusting SP in function prologue/epilogue. 51 void emitSPAdjustment(MachineFunction &MF, 52 MachineBasicBlock &MBB, 53 MachineBasicBlock::iterator MBBI, 54 int NumBytes, unsigned ADDrr, unsigned ADDri) const; 55 56 }; 57 58 } // End llvm namespace 59 60 #endif 61