1//===- MCWasmStreamer.h - MCStreamer Wasm Object File Interface -*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef LLVM_MC_MCWASMSTREAMER_H
11#define LLVM_MC_MCWASMSTREAMER_H
12
13#include "llvm/ADT/SmallPtrSet.h"
14#include "llvm/MC/MCDirectives.h"
15#include "llvm/MC/MCObjectStreamer.h"
16#include "llvm/MC/SectionKind.h"
17#include "llvm/Support/DataTypes.h"
18
19namespace llvm {
20class MCAsmBackend;
21class MCAssembler;
22class MCCodeEmitter;
23class MCExpr;
24class MCInst;
25class raw_ostream;
26
27class MCWasmStreamer : public MCObjectStreamer {
28public:
29  MCWasmStreamer(MCContext &Context, std::unique_ptr<MCAsmBackend> TAB,
30                 raw_pwrite_stream &OS, std::unique_ptr<MCCodeEmitter> Emitter)
31      : MCObjectStreamer(Context, std::move(TAB), OS, std::move(Emitter)),
32        SeenIdent(false) {}
33
34  ~MCWasmStreamer() override;
35
36  /// state management
37  void reset() override {
38    SeenIdent = false;
39    MCObjectStreamer::reset();
40  }
41
42  /// \name MCStreamer Interface
43  /// @{
44
45  void ChangeSection(MCSection *Section, const MCExpr *Subsection) override;
46  void EmitAssemblerFlag(MCAssemblerFlag Flag) override;
47  void EmitThumbFunc(MCSymbol *Func) override;
48  void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) override;
49  bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) override;
50  void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) override;
51  void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
52                        unsigned ByteAlignment) override;
53
54  void emitELFSize(MCSymbol *Symbol, const MCExpr *Value) override;
55
56  void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
57                             unsigned ByteAlignment) override;
58
59  void EmitZerofill(MCSection *Section, MCSymbol *Symbol = nullptr,
60                    uint64_t Size = 0, unsigned ByteAlignment = 0) override;
61  void EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol, uint64_t Size,
62                      unsigned ByteAlignment = 0) override;
63  void EmitValueImpl(const MCExpr *Value, unsigned Size,
64                     SMLoc Loc = SMLoc()) override;
65
66  void EmitIdent(StringRef IdentString) override;
67
68  void EmitValueToAlignment(unsigned, int64_t, unsigned, unsigned) override;
69
70  void FinishImpl() override;
71
72private:
73  void EmitInstToFragment(const MCInst &Inst, const MCSubtargetInfo &) override;
74  void EmitInstToData(const MCInst &Inst, const MCSubtargetInfo &) override;
75
76  /// \brief Merge the content of the fragment \p EF into the fragment \p DF.
77  void mergeFragment(MCDataFragment *, MCDataFragment *);
78
79  bool SeenIdent;
80};
81
82} // end namespace llvm
83
84#endif
85