include/llvm/MC/MCWasmStreamer.h

   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:
  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
  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