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, 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 71 private: 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
