LLVM 20.0.0git
CSKYFrameLowering.h
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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
17
18namespace llvm {
19class CSKYSubtarget;
20
22 const CSKYSubtarget &STI;
23
24 void determineFrameLayout(MachineFunction &MF) const;
26 const DebugLoc &DL, Register DestReg, Register SrcReg,
27 int64_t Val, MachineInstr::MIFlag Flag) const;
28
29public:
30 explicit CSKYFrameLowering(const CSKYSubtarget &STI)
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
40 Register &FrameReg) const override;
41
43 RegScavenger *RS) const override;
44
47 std::vector<CalleeSavedInfo> &CSI) const override {
48
49 std::reverse(CSI.begin(), CSI.end());
50
51 return false;
52 }
53
57 const TargetRegisterInfo *TRI) const override;
58 bool
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
71 MachineBasicBlock::iterator MI) const override;
72};
73} // namespace llvm
74#endif
MachineBasicBlock & MBB
MachineBasicBlock MachineBasicBlock::iterator DebugLoc DL
MachineBasicBlock MachineBasicBlock::iterator MBBI
IRTranslator LLVM IR MI
unsigned const TargetRegisterInfo * TRI
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory),...
Definition: ArrayRef.h:41
void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs, RegScavenger *RS) const override
This method determines which of the registers reported by TargetRegisterInfo::getCalleeSavedRegs() sh...
bool assignCalleeSavedSpillSlots(MachineFunction &MF, const TargetRegisterInfo *TRI, std::vector< CalleeSavedInfo > &CSI) const override
CSKYFrameLowering(const CSKYSubtarget &STI)
StackOffset getFrameIndexReference(const MachineFunction &MF, int FI, Register &FrameReg) const override
getFrameIndexReference - This method should return the base register and offset used to reference a f...
MachineBasicBlock::iterator eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator MI) const override
This method is called during prolog/epilog code insertion to eliminate call frame setup and destroy p...
bool hasReservedCallFrame(const MachineFunction &MF) const override
hasReservedCallFrame - Under normal circumstances, when a frame pointer is not required,...
void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override
bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, MutableArrayRef< CalleeSavedInfo > CSI, const TargetRegisterInfo *TRI) const override
restoreCalleeSavedRegisters - Issues instruction(s) to restore all callee saved registers and returns...
void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override
emitProlog/emitEpilog - These methods insert prolog and epilog code into the function.
bool hasBP(const MachineFunction &MF) const
bool hasFP(const MachineFunction &MF) const override
hasFP - Return true if the specified function should have a dedicated frame pointer register.
bool spillCalleeSavedRegisters(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, ArrayRef< CalleeSavedInfo > CSI, const TargetRegisterInfo *TRI) const override
spillCalleeSavedRegisters - Issues instruction(s) to spill all callee saved registers and returns tru...
A debug info location.
Definition: DebugLoc.h:33
MutableArrayRef - Represent a mutable reference to an array (0 or more elements consecutively in memo...
Definition: ArrayRef.h:307
Wrapper class representing virtual and physical registers.
Definition: Register.h:19
StackOffset holds a fixed and a scalable offset in bytes.
Definition: TypeSize.h:33
Information about stack frame layout on the target.
TargetRegisterInfo base class - We assume that the target defines a static array of TargetRegisterDes...
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
This struct is a compact representation of a valid (non-zero power of two) alignment.
Definition: Alignment.h:39