SparcFrameLowering.h revision 37ed9c199ca639565f6ce88105f9e39e898d82d0 
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
20namespace llvm {
21
22class SparcSubtarget;
23class SparcFrameLowering : public TargetFrameLowering {
24public:
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
42private:
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