LLVM 19.0.0git
LoongArchFrameLowering.h
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1//=- LoongArchFrameLowering.h - TargetFrameLowering for LoongArch -*- 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 LoongArch-specific bits of TargetFrameLowering class.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_LIB_TARGET_LOONGARCH_LOONGARCHFRAMELOWERING_H
14#define LLVM_LIB_TARGET_LOONGARCH_LOONGARCHFRAMELOWERING_H
15
17
18namespace llvm {
19class LoongArchSubtarget;
20
22 const LoongArchSubtarget &STI;
23
24public:
27 /*StackAlignment=*/Align(16),
28 /*LocalAreaOffset=*/0),
29 STI(STI) {}
30
31 void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
32 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
33
35 RegScavenger *RS) const override;
36
38 RegScavenger *RS) const override;
39
40 bool hasReservedCallFrame(const MachineFunction &MF) const override;
43 MachineBasicBlock::iterator MI) const override;
47 const TargetRegisterInfo *TRI) const override;
48
50 Register &FrameReg) const override;
51
52 bool hasFP(const MachineFunction &MF) const override;
53 bool hasBP(const MachineFunction &MF) const;
54
56 bool IsPrologue = false) const;
57
58 bool enableShrinkWrapping(const MachineFunction &MF) const override;
59
60private:
61 void determineFrameLayout(MachineFunction &MF) const;
63 const DebugLoc &DL, Register DestReg, Register SrcReg,
64 int64_t Val, MachineInstr::MIFlag Flag) const;
65};
66} // end namespace llvm
67#endif // LLVM_LIB_TARGET_LOONGARCH_LOONGARCHFRAMELOWERING_H
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
A debug info location.
Definition: DebugLoc.h:33
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...
void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override
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...
LoongArchFrameLowering(const LoongArchSubtarget &STI)
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...
void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs, RegScavenger *RS) const override
This method determines which of the registers reported by TargetRegisterInfo::getCalleeSavedRegs() sh...
void processFunctionBeforeFrameFinalized(MachineFunction &MF, RegScavenger *RS) const override
processFunctionBeforeFrameFinalized - This method is called immediately before the specified function...
bool enableShrinkWrapping(const MachineFunction &MF) const override
Returns true if the target will correctly handle shrink wrapping.
bool hasFP(const MachineFunction &MF) const override
hasFP - Return true if the specified function should have a dedicated frame pointer register.
uint64_t getFirstSPAdjustAmount(const MachineFunction &MF, bool IsPrologue=false) const
bool hasReservedCallFrame(const MachineFunction &MF) const override
hasReservedCallFrame - Under normal circumstances, when a frame pointer is not required,...
bool hasBP(const MachineFunction &MF) const
void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override
emitProlog/emitEpilog - These methods insert prolog and epilog code into the function.
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