LLVM 19.0.0git
LoongArchAsmBackend.h
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1//===-- LoongArchAsmBackend.h - LoongArch Assembler Backend ---*- 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 file defines the LoongArchAsmBackend class.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_LIB_TARGET_LOONGARCH_MCTARGETDESC_LOONGARCHASMBACKEND_H
14#define LLVM_LIB_TARGET_LOONGARCH_MCTARGETDESC_LOONGARCHASMBACKEND_H
15
20#include "llvm/MC/MCExpr.h"
22#include "llvm/MC/MCSection.h"
24
25namespace llvm {
26
28 const MCSubtargetInfo &STI;
29 uint8_t OSABI;
30 bool Is64Bit;
33
34public:
35 LoongArchAsmBackend(const MCSubtargetInfo &STI, uint8_t OSABI, bool Is64Bit,
38 LoongArch::fixup_loongarch_relax),
39 STI(STI), OSABI(OSABI), Is64Bit(Is64Bit), TargetOptions(Options) {}
41
42 bool handleAddSubRelocations(const MCAssembler &Asm, const MCFragment &F,
43 const MCFixup &Fixup, const MCValue &Target,
44 uint64_t &FixedValue) const override;
45
46 void applyFixup(const MCAssembler &Asm, const MCFixup &Fixup,
48 uint64_t Value, bool IsResolved,
49 const MCSubtargetInfo *STI) const override;
50
51 // Return Size with extra Nop Bytes for alignment directive in code section.
53 unsigned &Size) override;
54
55 // Insert target specific fixup type for alignment directive in code section.
57 MCAlignFragment &AF) override;
58
59 bool shouldForceRelocation(const MCAssembler &Asm, const MCFixup &Fixup,
60 const MCValue &Target,
61 const MCSubtargetInfo *STI) override;
62
63 unsigned getNumFixupKinds() const override {
65 }
66
67 std::optional<MCFixupKind> getFixupKind(StringRef Name) const override;
68
69 const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const override;
70
72 const MCSubtargetInfo &STI) const override {}
73
74 std::pair<bool, bool> relaxLEB128(const MCAssembler &Asm, MCLEBFragment &LF,
75 int64_t &Value) const override;
76
78 bool &WasRelaxed) const override;
80 bool &WasRelaxed) const override;
81
83 const MCSubtargetInfo *STI) const override;
84
85 std::unique_ptr<MCObjectTargetWriter>
86 createObjectTargetWriter() const override;
89 return SecToAlignSym;
90 }
91};
92} // end namespace llvm
93
94#endif // LLVM_LIB_TARGET_LOONGARCH_MCTARGETDESC_LOONGARCHASMBACKEND_H
static RegisterPass< DebugifyFunctionPass > DF("debugify-function", "Attach debug info to a function")
std::string Name
uint64_t Size
static LVOptions Options
Definition: LVOptions.cpp:25
#define F(x, y, z)
Definition: MD5.cpp:55
PowerPC TLS Dynamic Call Fixup
raw_pwrite_stream & OS
void applyFixup(const MCAssembler &Asm, const MCFixup &Fixup, const MCValue &Target, MutableArrayRef< char > Data, uint64_t Value, bool IsResolved, const MCSubtargetInfo *STI) const override
Apply the Value for given Fixup into the provided data fragment, at the offset specified by the fixup...
bool relaxDwarfLineAddr(const MCAssembler &Asm, MCDwarfLineAddrFragment &DF, bool &WasRelaxed) const override
std::unique_ptr< MCObjectTargetWriter > createObjectTargetWriter() const override
LoongArchAsmBackend(const MCSubtargetInfo &STI, uint8_t OSABI, bool Is64Bit, const MCTargetOptions &Options)
void relaxInstruction(MCInst &Inst, const MCSubtargetInfo &STI) const override
Relax the instruction in the given fragment to the next wider instruction.
std::optional< MCFixupKind > getFixupKind(StringRef Name) const override
Map a relocation name used in .reloc to a fixup kind.
bool shouldInsertFixupForCodeAlign(MCAssembler &Asm, MCAlignFragment &AF) override
Hook which indicates if the target requires a fixup to be generated when handling an align directive ...
DenseMap< MCSection *, const MCSymbolRefExpr * > & getSecToAlignSym()
std::pair< bool, bool > relaxLEB128(const MCAssembler &Asm, MCLEBFragment &LF, int64_t &Value) const override
const MCFixupKindInfo & getFixupKindInfo(MCFixupKind Kind) const override
Get information on a fixup kind.
const MCTargetOptions & getTargetOptions() const
bool shouldInsertExtraNopBytesForCodeAlign(const MCAlignFragment &AF, unsigned &Size) override
Hook to check if extra nop bytes must be inserted for alignment directive.
unsigned getNumFixupKinds() const override
Get the number of target specific fixup kinds.
bool writeNopData(raw_ostream &OS, uint64_t Count, const MCSubtargetInfo *STI) const override
Write an (optimal) nop sequence of Count bytes to the given output.
bool relaxDwarfCFA(const MCAssembler &Asm, MCDwarfCallFrameFragment &DF, bool &WasRelaxed) const override
bool handleAddSubRelocations(const MCAssembler &Asm, const MCFragment &F, const MCFixup &Fixup, const MCValue &Target, uint64_t &FixedValue) const override
bool shouldForceRelocation(const MCAssembler &Asm, const MCFixup &Fixup, const MCValue &Target, const MCSubtargetInfo *STI) override
Hook to check if a relocation is needed for some target specific reason.
Generic interface to target specific assembler backends.
Definition: MCAsmBackend.h:42
Encode information on a single operation to perform on a byte sequence (e.g., an encoded instruction)...
Definition: MCFixup.h:71
Instances of this class represent a single low-level machine instruction.
Definition: MCInst.h:184
Generic base class for all target subtargets.
This represents an "assembler immediate".
Definition: MCValue.h:36
MutableArrayRef - Represent a mutable reference to an array (0 or more elements consecutively in memo...
Definition: ArrayRef.h:307
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
Target - Wrapper for Target specific information.
LLVM Value Representation.
Definition: Value.h:74
This class implements an extremely fast bulk output stream that can only output to a stream.
Definition: raw_ostream.h:52
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
MCFixupKind
Extensible enumeration to represent the type of a fixup.
Definition: MCFixup.h:21
endianness
Definition: bit.h:70
Target independent information on a fixup kind.