LLVM 17.0.0git
MipsAsmBackend.h
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1//===-- MipsAsmBackend.h - Mips Asm Backend ------------------------------===//
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 MipsAsmBackend class.
10//
11//===----------------------------------------------------------------------===//
12//
13
14#ifndef LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSASMBACKEND_H
15#define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSASMBACKEND_H
16
18#include "llvm/ADT/Triple.h"
20
21namespace llvm {
22
23class MCAssembler;
24struct MCFixupKindInfo;
25class MCRegisterInfo;
26class Target;
27
29 Triple TheTriple;
30 bool IsN32;
31
32public:
33 MipsAsmBackend(const Target &T, const MCRegisterInfo &MRI, const Triple &TT,
34 StringRef CPU, bool N32)
35 : MCAsmBackend(TT.isLittleEndian() ? support::little : support::big),
36 TheTriple(TT), IsN32(N32) {}
37
38 std::unique_ptr<MCObjectTargetWriter>
39 createObjectTargetWriter() const override;
40
41 void applyFixup(const MCAssembler &Asm, const MCFixup &Fixup,
43 uint64_t Value, bool IsResolved,
44 const MCSubtargetInfo *STI) const override;
45
46 std::optional<MCFixupKind> getFixupKind(StringRef Name) const override;
47 const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const override;
48
49 unsigned getNumFixupKinds() const override {
51 }
52
53 /// @name Target Relaxation Interfaces
54 /// @{
55
56 /// fixupNeedsRelaxation - Target specific predicate for whether a given
57 /// fixup requires the associated instruction to be relaxed.
60 const MCAsmLayout &Layout) const override {
61 // FIXME.
62 llvm_unreachable("RelaxInstruction() unimplemented");
63 return false;
64 }
65
66 bool writeNopData(raw_ostream &OS, uint64_t Count,
67 const MCSubtargetInfo *STI) const override;
68
69 bool shouldForceRelocation(const MCAssembler &Asm, const MCFixup &Fixup,
70 const MCValue &Target) override;
71
72 bool isMicroMips(const MCSymbol *Sym) const override;
73}; // class MipsAsmBackend
74
75} // namespace
76
77#endif
unsigned const MachineRegisterInfo * MRI
This header is deprecated in favour of llvm/TargetParser/Triple.h.
static RegisterPass< DebugifyFunctionPass > DF("debugify-function", "Attach debug info to a function")
std::string Name
PowerPC TLS Dynamic Call Fixup
Generic interface to target specific assembler backends.
Definition: MCAsmBackend.h:41
Encapsulates the layout of an assembly file at a particular point in time.
Definition: MCAsmLayout.h:28
Encode information on a single operation to perform on a byte sequence (e.g., an encoded instruction)...
Definition: MCFixup.h:71
MCRegisterInfo base class - We assume that the target defines a static array of MCRegisterDesc object...
A relaxable fragment holds on to its MCInst, since it may need to be relaxed during the assembler lay...
Definition: MCFragment.h:270
Generic base class for all target subtargets.
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:41
This represents an "assembler immediate".
Definition: MCValue.h:36
bool shouldForceRelocation(const MCAssembler &Asm, const MCFixup &Fixup, const MCValue &Target) override
Hook to check if a relocation is needed for some target specific reason.
unsigned getNumFixupKinds() const override
Get the number of target specific fixup kinds.
bool fixupNeedsRelaxation(const MCFixup &Fixup, uint64_t Value, const MCRelaxableFragment *DF, const MCAsmLayout &Layout) const override
fixupNeedsRelaxation - Target specific predicate for whether a given fixup requires the associated in...
bool writeNopData(raw_ostream &OS, uint64_t Count, const MCSubtargetInfo *STI) const override
WriteNopData - Write an (optimal) nop sequence of Count bytes to the given output.
void applyFixup(const MCAssembler &Asm, const MCFixup &Fixup, const MCValue &Target, MutableArrayRef< char > Data, uint64_t Value, bool IsResolved, const MCSubtargetInfo *STI) const override
ApplyFixup - Apply the Value for given Fixup into the provided data fragment, at the offset specified...
std::optional< MCFixupKind > getFixupKind(StringRef Name) const override
Map a relocation name used in .reloc to a fixup kind.
const MCFixupKindInfo & getFixupKindInfo(MCFixupKind Kind) const override
Get information on a fixup kind.
std::unique_ptr< MCObjectTargetWriter > createObjectTargetWriter() const override
bool isMicroMips(const MCSymbol *Sym) const override
Check whether a given symbol has been flagged with MICROMIPS flag.
MipsAsmBackend(const Target &T, const MCRegisterInfo &MRI, const Triple &TT, StringRef CPU, bool N32)
MutableArrayRef - Represent a mutable reference to an array (0 or more elements consecutively in memo...
Definition: ArrayRef.h:305
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
Target - Wrapper for Target specific information.
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:44
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
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
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
Target independent information on a fixup kind.