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#include "llvm/Support/TypeSize.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 MachineBasicBlock::iterator
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 StackOffset getFrameIndexReference(const MachineFunction &MF, int FI,
43 Register &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