1//===-- SparcFrameLowering.h - Define frame lowering for Sparc --*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9//
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_LIB_TARGET_SPARC_SPARCFRAMELOWERING_H
14#define LLVM_LIB_TARGET_SPARC_SPARCFRAMELOWERING_H
15
16#include "Sparc.h"
17#include "llvm/CodeGen/TargetFrameLowering.h"
18
19namespace llvm {
20
21class SparcSubtarget;
22class SparcFrameLowering : public TargetFrameLowering {
23public:
24  explicit SparcFrameLowering(const SparcSubtarget &ST);
25
26  /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
27  /// the function.
28  void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
29  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
30
31  MachineBasicBlock::iterator
32  eliminateCallFramePseudoInstr(MachineFunction &MF,
33                                MachineBasicBlock &MBB,
34                                MachineBasicBlock::iterator I) const override;
35
36  bool hasReservedCallFrame(const MachineFunction &MF) const override;
37  bool hasFP(const MachineFunction &MF) const override;
38  void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
39                            RegScavenger *RS = nullptr) const override;
40
41  int getFrameIndexReference(const MachineFunction &MF, int FI,
42                             Register &FrameReg) const override;
43
44  /// targetHandlesStackFrameRounding - Returns true if the target is
45  /// responsible for rounding up the stack frame (probably at emitPrologue
46  /// time).
47  bool targetHandlesStackFrameRounding() const override { return true; }
48
49private:
50  // Remap input registers to output registers for leaf procedure.
51  void remapRegsForLeafProc(MachineFunction &MF) const;
52
53  // Returns true if MF is a leaf procedure.
54  bool isLeafProc(MachineFunction &MF) const;
55
56
57  // Emits code for adjusting SP in function prologue/epilogue.
58  void emitSPAdjustment(MachineFunction &MF,
59                        MachineBasicBlock &MBB,
60                        MachineBasicBlock::iterator MBBI,
61                        int NumBytes, unsigned ADDrr, unsigned ADDri) const;
62
63};
64
65} // End llvm namespace
66
67#endif
68