SystemZHLASMAsmStreamer.h

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//===- SystemZHLASMAsmStreamer.h - HLASM Assembly Text Output ---*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file declares the SystemZHLASMAsmStreamer class.
//
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_LIB_TARGET_SYSTEMZ_MCTARGETDESC_SYSTEMZHLASMASMSTREAMER_H
#define LLVM_LIB_TARGET_SYSTEMZ_MCTARGETDESC_SYSTEMZHLASMASMSTREAMER_H
 
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/MC/MCAsmBackend.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCAsmStreamer.h"
#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstPrinter.h"
#include "llvm/MC/MCObjectWriter.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCTargetOptions.h"
#include "llvm/Support/FormattedStream.h"
 
namespace llvm {
class MCSymbolGOFF;
 
class SystemZHLASMAsmStreamer final : public MCAsmBaseStreamer {
  constexpr static size_t InstLimit = 80;
  constexpr static size_t ContIndicatorColumn = 72;
  constexpr static size_t ContStartColumn = 15;
  constexpr static size_t ContLen = ContIndicatorColumn - ContStartColumn;
  std::unique_ptr<formatted_raw_ostream> FOSOwner;
  formatted_raw_ostream &FOS;
  std::string Str;
  raw_string_ostream OS;
  const MCAsmInfo *MAI;
  std::unique_ptr<MCInstPrinter> InstPrinter;
  bool IsVerboseAsm = false;
 
public:
  SystemZHLASMAsmStreamer(MCContext &Context,
                          std::unique_ptr<formatted_raw_ostream> OS,
                          std::unique_ptr<MCInstPrinter> Printer,
                          std::unique_ptr<MCCodeEmitter> Emitter,
                          std::unique_ptr<MCAsmBackend> AsmBackend)
      : MCAsmBaseStreamer(Context, std::move(Emitter), std::move(AsmBackend)),
        FOSOwner(std::move(OS)), FOS(*FOSOwner), OS(Str),
        MAI(&Context.getAsmInfo()), InstPrinter(std::move(Printer)) {
    assert(InstPrinter);
    if (Assembler->getBackendPtr())
      setAllowAutoPadding(Assembler->getBackend().allowAutoPadding());
 
    Context.setUseNamesOnTempLabels(true);
    IsVerboseAsm = Context.getTargetOptions().AsmVerbose;
    if (IsVerboseAsm)
      InstPrinter->setCommentStream(CommentStream);
  }
 
  void EmitEOL();
  void EmitComment();
 
  /// Add a comment that can be emitted to the generated .s file to make the
  /// output of the compiler more readable. This only affects the MCAsmStreamer
  /// and only when verbose assembly output is enabled.
  void AddComment(const Twine &T, bool EOL = true) override;
 
  void emitBytes(StringRef Data) override;
 
  void emitAlignmentDS(uint64_t ByteAlignment, std::optional<int64_t> Value,
                       unsigned ValueSize, unsigned MaxBytesToEmit);
  void emitValueToAlignment(Align Alignment, int64_t Fill, uint8_t FillLen,
                            unsigned MaxBytesToEmit) override;
 
  void emitCodeAlignment(Align Alignment, const MCSubtargetInfo &STI,
                         unsigned MaxBytesToEmit = 0) override;
 
  void emitRawComment(const Twine &T, bool TabPrefix = false) override;
  /// Return true if this streamer supports verbose assembly at all.
  bool isVerboseAsm() const override { return IsVerboseAsm; }
 
  /// Do we support EmitRawText?
  bool hasRawTextSupport() const override { return true; }
 
  void addEncodingComment(const MCInst &Inst, const MCSubtargetInfo &STI);
 
  /// @name MCStreamer Interface
  /// @{
  void visitUsedSymbol(const MCSymbol &Sym) override;
 
  void changeSection(MCSection *Section, uint32_t Subsection) override;
 
  void emitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) override;
  void emitLabel(MCSymbol *Symbol, SMLoc Loc) override;
  bool emitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) override;
 
  void emitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
                        Align ByteAlignment) override {}
 
  void emitZerofill(MCSection *Section, MCSymbol *Symbol = nullptr,
                    uint64_t Size = 0, Align ByteAlignment = Align(1),
                    SMLoc Loc = SMLoc()) override {}
  void emitRawTextImpl(StringRef String) override;
  void emitValueImpl(const MCExpr *Value, unsigned Size, SMLoc Loc) override;
 
  void emitHLASMValueImpl(const MCExpr *Value, unsigned Size,
                          bool Parens = false);
  /// @}
 
  void finishImpl() override;
};
} // namespace llvm
 
#endif // LLVM_LIB_TARGET_SYSTEMZ_MCTARGETDESC_SYSTEMZHLASMASMSTREAMER_H