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 19 namespace llvm { 20 class MCAsmBackend; 21 class MCAssembler; 22 class MCCodeEmitter; 23 class MCExpr; 24 class MCInst; 25 class raw_ostream; 26 27 class MCWasmStreamer : public MCObjectStreamer { 28 public: 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 72 private: 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
