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, MCAsmBackend &TAB, raw_pwrite_stream &OS,
30                 MCCodeEmitter *Emitter)
31      : MCObjectStreamer(Context, TAB, OS, Emitter), SeenIdent(false) {}
32
33  ~MCWasmStreamer() override;
34
35  /// state management
36  void reset() override {
37    SeenIdent = false;
38    MCObjectStreamer::reset();
39  }
40
41  /// \name MCStreamer Interface
42  /// @{
43
44  void ChangeSection(MCSection *Section, const MCExpr *Subsection) override;
45  void EmitAssemblerFlag(MCAssemblerFlag Flag) override;
46  void EmitThumbFunc(MCSymbol *Func) override;
47  void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) override;
48  bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) override;
49  void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) override;
50  void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
51                        unsigned ByteAlignment) override;
52
53  void emitELFSize(MCSymbol *Symbol, const MCExpr *Value) override;
54
55  void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
56                             unsigned ByteAlignment) override;
57
58  void EmitZerofill(MCSection *Section, MCSymbol *Symbol = nullptr,
59                    uint64_t Size = 0, unsigned ByteAlignment = 0) override;
60  void EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol, uint64_t Size,
61                      unsigned ByteAlignment = 0) override;
62  void EmitValueImpl(const MCExpr *Value, unsigned Size,
63                     SMLoc Loc = SMLoc()) override;
64
65  void EmitIdent(StringRef IdentString) override;
66
67  void EmitValueToAlignment(unsigned, int64_t, unsigned, unsigned) override;
68
69  void FinishImpl() override;
70
71private:
72  void EmitInstToFragment(const MCInst &Inst, const MCSubtargetInfo &) override;
73  void EmitInstToData(const MCInst &Inst, const MCSubtargetInfo &) override;
74
75  /// \brief Merge the content of the fragment \p EF into the fragment \p DF.
76  void mergeFragment(MCDataFragment *, MCDataFragment *);
77
78  bool SeenIdent;
79};
80
81} // end namespace llvm
82
83#endif
84