src/llvm/lib/Target/Sparc/SparcFrameLowering.h

   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 LLVM_LIB_TARGET_SPARC_SPARCFRAMELOWERING_H
  15 #define LLVM_LIB_TARGET_SPARC_SPARCFRAMELOWERING_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