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 "MCAsmBackend.h" 14 #include "MCCodeEmitter.h" 15 #include "llvm/ADT/SmallPtrSet.h" 16 #include "llvm/MC/MCDirectives.h" 17 #include "llvm/MC/MCObjectStreamer.h" 18 #include "llvm/MC/MCObjectWriter.h" 19 #include "llvm/MC/SectionKind.h" 20 #include "llvm/Support/DataTypes.h" 21 22 namespace llvm { 23 class MCAssembler; 24 class MCExpr; 25 class MCInst; 26 class raw_ostream; 27 28 class MCWasmStreamer : public MCObjectStreamer { 29 public: MCWasmStreamer(MCContext & Context,std::unique_ptr<MCAsmBackend> TAB,std::unique_ptr<MCObjectWriter> OW,std::unique_ptr<MCCodeEmitter> Emitter)30 MCWasmStreamer(MCContext &Context, std::unique_ptr<MCAsmBackend> TAB, 31 std::unique_ptr<MCObjectWriter> OW, 32 std::unique_ptr<MCCodeEmitter> Emitter) 33 : MCObjectStreamer(Context, std::move(TAB), std::move(OW), 34 std::move(Emitter)), 35 SeenIdent(false) {} 36 37 ~MCWasmStreamer() override; 38 39 /// state management reset()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, 63 uint64_t Size = 0, unsigned ByteAlignment = 0, 64 SMLoc Loc = SMLoc()) override; 65 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 76 private: 77 void EmitInstToFragment(const MCInst &Inst, const MCSubtargetInfo &) override; 78 void EmitInstToData(const MCInst &Inst, const MCSubtargetInfo &) override; 79 80 /// Merge the content of the fragment \p EF into the fragment \p DF. 81 void mergeFragment(MCDataFragment *, MCDataFragment *); 82 83 bool SeenIdent; 84 }; 85 86 } // end namespace llvm 87 88 #endif 89