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, MachineBasicBlock &MBB) 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 determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
40                            RegScavenger *RS = nullptr) const override;
41
42  int getFrameIndexReference(const MachineFunction &MF, int FI,
43                             unsigned &FrameReg) const override;
44
45  /// targetHandlesStackFrameRounding - Returns true if the target is
46  /// responsible for rounding up the stack frame (probably at emitPrologue
47  /// time).
48  bool targetHandlesStackFrameRounding() const override { return true; }
49
50private:
51  // Remap input registers to output registers for leaf procedure.
52  void remapRegsForLeafProc(MachineFunction &MF) const;
53
54  // Returns true if MF is a leaf procedure.
55  bool isLeafProc(MachineFunction &MF) const;
56
57
58  // Emits code for adjusting SP in function prologue/epilogue.
59  void emitSPAdjustment(MachineFunction &MF,
60                        MachineBasicBlock &MBB,
61                        MachineBasicBlock::iterator MBBI,
62                        int NumBytes, unsigned ADDrr, unsigned ADDri) const;
63
64};
65
66} // End llvm namespace
67
68#endif
69