1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
//===- MipsELFStreamer.h - ELF Object Output --------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This is a custom MCELFStreamer which allows us to insert some hooks before
// emitting data into an actual object file.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSELFSTREAMER_H
#define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSELFSTREAMER_H
#include "MipsOptionRecord.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/MC/MCELFStreamer.h"
#include <memory>
namespace llvm {
class MCAsmBackend;
class MCCodeEmitter;
class MCContext;
class MCSubtargetInfo;
class MipsELFStreamer : public MCELFStreamer {
SmallVector<std::unique_ptr<MipsOptionRecord>, 8> MipsOptionRecords;
MipsRegInfoRecord *RegInfoRecord;
SmallVector<MCSymbol*, 4> Labels;
public:
MipsELFStreamer(MCContext &Context, std::unique_ptr<MCAsmBackend> MAB,
std::unique_ptr<MCObjectWriter> OW,
std::unique_ptr<MCCodeEmitter> Emitter);
/// Overriding this function allows us to add arbitrary behaviour before the
/// \p Inst is actually emitted. For example, we can inspect the operands and
/// gather sufficient information that allows us to reason about the register
/// usage for the translation unit.
void EmitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI,
bool = false) override;
/// Overriding this function allows us to record all labels that should be
/// marked as microMIPS. Based on this data marking is done in
/// EmitInstruction.
void EmitLabel(MCSymbol *Symbol, SMLoc Loc = SMLoc()) override;
/// Overriding this function allows us to dismiss all labels that are
/// candidates for marking as microMIPS when .section directive is processed.
void SwitchSection(MCSection *Section,
const MCExpr *Subsection = nullptr) override;
/// Overriding these functions allows us to dismiss all labels that are
/// candidates for marking as microMIPS when .word/.long/.4byte etc
/// directives are emitted.
void EmitValueImpl(const MCExpr *Value, unsigned Size, SMLoc Loc) override;
void EmitIntValue(uint64_t Value, unsigned Size) override;
/// Emits all the option records stored up until the point it's called.
void EmitMipsOptionRecords();
/// Mark labels as microMIPS, if necessary for the subtarget.
void createPendingLabelRelocs();
};
MCELFStreamer *createMipsELFStreamer(MCContext &Context,
std::unique_ptr<MCAsmBackend> MAB,
std::unique_ptr<MCObjectWriter> OW,
std::unique_ptr<MCCodeEmitter> Emitter,
bool RelaxAll);
} // end namespace llvm
#endif // LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSELFSTREAMER_H
|
