1//===-- CSKYFrameLowering.h - Define frame lowering for CSKY -*- 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// This class implements CSKY-specific bits of TargetFrameLowering class.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_LIB_TARGET_CSKY_CSKYFRAMELOWERING_H
14#define LLVM_LIB_TARGET_CSKY_CSKYFRAMELOWERING_H
15
16#include "llvm/CodeGen/TargetFrameLowering.h"
17
18namespace llvm {
19class CSKYSubtarget;
20
21class CSKYFrameLowering : public TargetFrameLowering {
22 const CSKYSubtarget &STI;
23
24 void determineFrameLayout(MachineFunction &MF) const;
25 void adjustReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
26 const DebugLoc &DL, Register DestReg, Register SrcReg,
27 int64_t Val, MachineInstr::MIFlag Flag) const;
28
29public:
30 explicit CSKYFrameLowering(const CSKYSubtarget &STI)
31 : TargetFrameLowering(StackGrowsDown,
32 /*StackAlignment=*/Align(4),
33 /*LocalAreaOffset=*/0),
34 STI(STI) {}
35
36 void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
37 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
38
39 StackOffset getFrameIndexReference(const MachineFunction &MF, int FI,
40 Register &FrameReg) const override;
41
42 void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
43 RegScavenger *RS) const override;
44
45 bool assignCalleeSavedSpillSlots(
46 MachineFunction &MF, const TargetRegisterInfo *TRI,
47 std::vector<CalleeSavedInfo> &CSI) const override {
48
49 std::reverse(first: CSI.begin(), last: CSI.end());
50
51 return false;
52 }
53
54 bool spillCalleeSavedRegisters(MachineBasicBlock &MBB,
55 MachineBasicBlock::iterator MI,
56 ArrayRef<CalleeSavedInfo> CSI,
57 const TargetRegisterInfo *TRI) const override;
58 bool
59 restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
60 MachineBasicBlock::iterator MI,
61 MutableArrayRef<CalleeSavedInfo> CSI,
62 const TargetRegisterInfo *TRI) const override;
63
64 bool hasFP(const MachineFunction &MF) const override;
65 bool hasBP(const MachineFunction &MF) const;
66
67 bool hasReservedCallFrame(const MachineFunction &MF) const override;
68
69 MachineBasicBlock::iterator
70 eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
71 MachineBasicBlock::iterator MI) const override;
72};
73} // namespace llvm
74#endif
75

source code of llvm/lib/Target/CSKY/CSKYFrameLowering.h