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Andrew Scull5e1ddfa2018-08-14 10:06:54 +01001//===- 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 "MCAsmBackend.h"
14#include "MCCodeEmitter.h"
15#include "llvm/ADT/SmallPtrSet.h"
16#include "llvm/MC/MCDirectives.h"
17#include "llvm/MC/MCObjectStreamer.h"
Andrew Scullcdfcccc2018-10-05 20:58:37 +010018#include "llvm/MC/MCObjectWriter.h"
Andrew Scull5e1ddfa2018-08-14 10:06:54 +010019#include "llvm/MC/SectionKind.h"
20#include "llvm/Support/DataTypes.h"
21
22namespace llvm {
23class MCAssembler;
24class MCExpr;
25class MCInst;
26class raw_ostream;
27
28class MCWasmStreamer : public MCObjectStreamer {
29public:
30 MCWasmStreamer(MCContext &Context, std::unique_ptr<MCAsmBackend> TAB,
Andrew Scullcdfcccc2018-10-05 20:58:37 +010031 std::unique_ptr<MCObjectWriter> OW,
32 std::unique_ptr<MCCodeEmitter> Emitter)
33 : MCObjectStreamer(Context, std::move(TAB), std::move(OW),
34 std::move(Emitter)),
Andrew Scull5e1ddfa2018-08-14 10:06:54 +010035 SeenIdent(false) {}
36
37 ~MCWasmStreamer() override;
38
39 /// state management
40 void reset() override {
41 SeenIdent = false;
42 MCObjectStreamer::reset();
43 }
44
45 /// \name MCStreamer Interface
46 /// @{
47
48 void ChangeSection(MCSection *Section, const MCExpr *Subsection) override;
49 void EmitAssemblerFlag(MCAssemblerFlag Flag) override;
50 void EmitThumbFunc(MCSymbol *Func) override;
51 void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) override;
52 bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) override;
53 void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) override;
54 void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
55 unsigned ByteAlignment) override;
56
57 void emitELFSize(MCSymbol *Symbol, const MCExpr *Value) override;
58
59 void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
60 unsigned ByteAlignment) override;
61
62 void EmitZerofill(MCSection *Section, MCSymbol *Symbol = nullptr,
Andrew Scullcdfcccc2018-10-05 20:58:37 +010063 uint64_t Size = 0, unsigned ByteAlignment = 0,
64 SMLoc Loc = SMLoc()) override;
Andrew Scull5e1ddfa2018-08-14 10:06:54 +010065 void EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol, uint64_t Size,
66 unsigned ByteAlignment = 0) override;
67 void EmitValueImpl(const MCExpr *Value, unsigned Size,
68 SMLoc Loc = SMLoc()) override;
69
70 void EmitIdent(StringRef IdentString) override;
71
72 void EmitValueToAlignment(unsigned, int64_t, unsigned, unsigned) override;
73
74 void FinishImpl() override;
75
76private:
77 void EmitInstToFragment(const MCInst &Inst, const MCSubtargetInfo &) override;
78 void EmitInstToData(const MCInst &Inst, const MCSubtargetInfo &) override;
79
Andrew Scullcdfcccc2018-10-05 20:58:37 +010080 /// Merge the content of the fragment \p EF into the fragment \p DF.
Andrew Scull5e1ddfa2018-08-14 10:06:54 +010081 void mergeFragment(MCDataFragment *, MCDataFragment *);
82
83 bool SeenIdent;
84};
85
86} // end namespace llvm
87
88#endif