LLVM 20.0.0git
MipsELFStreamer.h
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1//===- MipsELFStreamer.h - ELF Object Output --------------------*- 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 is a custom MCELFStreamer which allows us to insert some hooks before
10// emitting data into an actual object file.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSELFSTREAMER_H
15#define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSELFSTREAMER_H
16
17#include "MipsOptionRecord.h"
20#include <memory>
21
22namespace llvm {
23
24class MCAsmBackend;
25class MCCodeEmitter;
26class MCContext;
27class MCSubtargetInfo;
28struct MCDwarfFrameInfo;
29
32 MipsRegInfoRecord *RegInfoRecord;
34
35public:
36 MipsELFStreamer(MCContext &Context, std::unique_ptr<MCAsmBackend> MAB,
37 std::unique_ptr<MCObjectWriter> OW,
38 std::unique_ptr<MCCodeEmitter> Emitter);
39
40 /// Overriding this function allows us to add arbitrary behaviour before the
41 /// \p Inst is actually emitted. For example, we can inspect the operands and
42 /// gather sufficient information that allows us to reason about the register
43 /// usage for the translation unit.
44 void emitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) override;
45
46 /// Overriding this function allows us to record all labels that should be
47 /// marked as microMIPS. Based on this data marking is done in
48 /// EmitInstruction.
49 void emitLabel(MCSymbol *Symbol, SMLoc Loc = SMLoc()) override;
50
51 /// Overriding this function allows us to dismiss all labels that are
52 /// candidates for marking as microMIPS when .section directive is processed.
53 void switchSection(MCSection *Section, uint32_t Subsection = 0) override;
54
55 /// Overriding these functions allows us to dismiss all labels that are
56 /// candidates for marking as microMIPS when .word/.long/.4byte etc
57 /// directives are emitted.
58 void emitValueImpl(const MCExpr *Value, unsigned Size, SMLoc Loc) override;
59 void emitIntValue(uint64_t Value, unsigned Size) override;
60
61 // Overriding these functions allows us to avoid recording of these labels
62 // in EmitLabel and later marking them as microMIPS.
63 void emitCFIStartProcImpl(MCDwarfFrameInfo &Frame) override;
64 void emitCFIEndProcImpl(MCDwarfFrameInfo &Frame) override;
65 MCSymbol *emitCFILabel() override;
66
67 /// Emits all the option records stored up until the point it's called.
69
70 /// Mark labels as microMIPS, if necessary for the subtarget.
72};
73
75 std::unique_ptr<MCAsmBackend> MAB,
76 std::unique_ptr<MCObjectWriter> OW,
77 std::unique_ptr<MCCodeEmitter> Emitter);
78} // end namespace llvm
79
80#endif // LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSELFSTREAMER_H
dxil DXContainer Global Emitter
uint64_t Size
This file defines the SmallVector class.
Context object for machine code objects.
Definition: MCContext.h:83
Base class for the full range of assembler expressions which are needed for parsing.
Definition: MCExpr.h:34
Instances of this class represent a single low-level machine instruction.
Definition: MCInst.h:184
Instances of this class represent a uniqued identifier for a section in the current translation unit.
Definition: MCSection.h:36
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
void emitCFIStartProcImpl(MCDwarfFrameInfo &Frame) override
void EmitMipsOptionRecords()
Emits all the option records stored up until the point it's called.
void emitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) override
Overriding this function allows us to add arbitrary behaviour before the Inst is actually emitted.
void emitLabel(MCSymbol *Symbol, SMLoc Loc=SMLoc()) override
Overriding this function allows us to record all labels that should be marked as microMIPS.
void emitCFIEndProcImpl(MCDwarfFrameInfo &Frame) override
MCSymbol * emitCFILabel() override
When emitting an object file, create and emit a real label.
void createPendingLabelRelocs()
Mark labels as microMIPS, if necessary for the subtarget.
void switchSection(MCSection *Section, uint32_t Subsection=0) override
Overriding this function allows us to dismiss all labels that are candidates for marking as microMIPS...
void emitIntValue(uint64_t Value, unsigned Size) override
Special case of EmitValue that avoids the client having to pass in a MCExpr for constant integers.
void emitValueImpl(const MCExpr *Value, unsigned Size, SMLoc Loc) override
Overriding these functions allows us to dismiss all labels that are candidates for marking as microMI...
Represents a location in source code.
Definition: SMLoc.h:23
This is a 'vector' (really, a variable-sized array), optimized for the case when the array is small.
Definition: SmallVector.h:1209
LLVM Value Representation.
Definition: Value.h:74
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
MCELFStreamer * createMipsELFStreamer(MCContext &Context, std::unique_ptr< MCAsmBackend > MAB, std::unique_ptr< MCObjectWriter > OW, std::unique_ptr< MCCodeEmitter > Emitter)