1 //===- MCWasmStreamer.h - MCStreamer Wasm Object File Interface -*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef LLVM_MC_MCWASMSTREAMER_H 10 #define LLVM_MC_MCWASMSTREAMER_H 11 12 #include "MCAsmBackend.h" 13 #include "MCCodeEmitter.h" 14 #include "llvm/ADT/SmallPtrSet.h" 15 #include "llvm/MC/MCDirectives.h" 16 #include "llvm/MC/MCObjectStreamer.h" 17 #include "llvm/MC/MCObjectWriter.h" 18 #include "llvm/MC/SectionKind.h" 19 #include "llvm/Support/DataTypes.h" 20 21 namespace llvm { 22 class MCAssembler; 23 class MCExpr; 24 class MCInst; 25 class raw_ostream; 26 27 class MCWasmStreamer : public MCObjectStreamer { 28 public: MCWasmStreamer(MCContext & Context,std::unique_ptr<MCAsmBackend> TAB,std::unique_ptr<MCObjectWriter> OW,std::unique_ptr<MCCodeEmitter> Emitter)29 MCWasmStreamer(MCContext &Context, std::unique_ptr<MCAsmBackend> TAB, 30 std::unique_ptr<MCObjectWriter> OW, 31 std::unique_ptr<MCCodeEmitter> Emitter) 32 : MCObjectStreamer(Context, std::move(TAB), std::move(OW), 33 std::move(Emitter)), 34 SeenIdent(false) {} 35 36 ~MCWasmStreamer() override; 37 38 /// state management reset()39 void reset() override { 40 SeenIdent = false; 41 MCObjectStreamer::reset(); 42 } 43 44 /// \name MCStreamer Interface 45 /// @{ 46 47 void ChangeSection(MCSection *Section, const MCExpr *Subsection) override; 48 void EmitAssemblerFlag(MCAssemblerFlag Flag) override; 49 void EmitThumbFunc(MCSymbol *Func) override; 50 void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) override; 51 bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) override; 52 void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) override; 53 void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size, 54 unsigned ByteAlignment) override; 55 56 void emitELFSize(MCSymbol *Symbol, const MCExpr *Value) override; 57 58 void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size, 59 unsigned ByteAlignment) override; 60 61 void EmitZerofill(MCSection *Section, MCSymbol *Symbol = nullptr, 62 uint64_t Size = 0, unsigned ByteAlignment = 0, 63 SMLoc Loc = SMLoc()) override; 64 void EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol, uint64_t Size, 65 unsigned ByteAlignment = 0) override; 66 void EmitValueImpl(const MCExpr *Value, unsigned Size, 67 SMLoc Loc = SMLoc()) override; 68 69 void EmitIdent(StringRef IdentString) override; 70 71 void EmitValueToAlignment(unsigned, int64_t, unsigned, unsigned) override; 72 73 void FinishImpl() override; 74 75 private: 76 void EmitInstToFragment(const MCInst &Inst, const MCSubtargetInfo &) override; 77 void EmitInstToData(const MCInst &Inst, const MCSubtargetInfo &) override; 78 79 /// Merge the content of the fragment \p EF into the fragment \p DF. 80 void mergeFragment(MCDataFragment *, MCDataFragment *); 81 82 bool SeenIdent; 83 }; 84 85 } // end namespace llvm 86 87 #endif 88