Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

//===- MCContext.h - Machine Code Context -----------------------*- 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

//

//===----------------------------------------------------------------------===//

#ifndef LLVM_MC_MCCONTEXT_H

#define LLVM_MC_MCCONTEXT_H

#include "llvm/ADT/DenseMap.h"

#include "llvm/ADT/SetVector.h"

#include "llvm/ADT/SmallString.h"

#include "llvm/ADT/StringMap.h"

#include "llvm/ADT/StringRef.h"

#include "llvm/ADT/Twine.h"

#include "llvm/BinaryFormat/Dwarf.h"

#include "llvm/BinaryFormat/XCOFF.h"

#include "llvm/MC/MCAsmMacro.h"

#include "llvm/MC/MCDwarf.h"

#include "llvm/MC/MCPseudoProbe.h"

#include "llvm/MC/MCSection.h"

#include "llvm/MC/SectionKind.h"

#include "llvm/Support/Allocator.h"

#include "llvm/Support/Compiler.h"

#include "llvm/Support/Error.h"

#include "llvm/Support/MD5.h"

#include "llvm/Support/raw_ostream.h"

#include <algorithm>

#include <cassert>

#include <cstddef>

#include <cstdint>

#include <functional>

#include <map>

#include <memory>

#include <optional>

#include <string>

#include <utility>

#include <vector>

namespace llvm {

class CodeViewContext;

class MCAsmInfo;

class MCInst;

class MCLabel;

class MCObjectFileInfo;

class MCRegisterInfo;

class MCSection;

class MCSectionCOFF;

class MCSectionDXContainer;

class MCSectionELF;

class MCSectionGOFF;

class MCSectionMachO;

class MCSectionSPIRV;

class MCSectionWasm;

class MCSectionXCOFF;

class MCStreamer;

class MCSubtargetInfo;

class MCSymbol;

class MCSymbolELF;

class MCSymbolWasm;

class MCSymbolXCOFF;

class MCTargetOptions;

class MDNode;

template <typename T> class SmallVectorImpl;

class SMDiagnostic;

class SMLoc;

class SourceMgr;

enum class EmitDwarfUnwindType;

/// Context object for machine code objects.  This class owns all of the

/// sections that it creates.

///

class MCContext {

public:

  using SymbolTable = StringMap<MCSymbol *, BumpPtrAllocator &>;

  using DiagHandlerTy =

      std::function<void(const SMDiagnostic &, bool, const SourceMgr &,

                         std::vector<const MDNode *> &)>;

  enum Environment {

    IsMachO,

    IsELF,

    IsGOFF,

    IsCOFF,

    IsSPIRV,

    IsWasm,

    IsXCOFF,

    IsDXContainer

  };

private:

  Environment Env;

  /// The name of the Segment where Swift5 Reflection Section data will be

  /// outputted

  StringRef Swift5ReflectionSegmentName;

  /// The triple for this object.

  Triple TT;

  /// The SourceMgr for this object, if any.

  const SourceMgr *SrcMgr;

  /// The SourceMgr for inline assembly, if any.

  std::unique_ptr<SourceMgr> InlineSrcMgr;

  std::vector<const MDNode *> LocInfos;

  DiagHandlerTy DiagHandler;

  /// The MCAsmInfo for this target.

  const MCAsmInfo *MAI;

  /// The MCRegisterInfo for this target.

  const MCRegisterInfo *MRI;

  /// The MCObjectFileInfo for this target.

  const MCObjectFileInfo *MOFI;

  /// The MCSubtargetInfo for this target.

  const MCSubtargetInfo *MSTI;

  std::unique_ptr<CodeViewContext> CVContext;

  /// Allocator object used for creating machine code objects.

  ///

  /// We use a bump pointer allocator to avoid the need to track all allocated

  /// objects.

  BumpPtrAllocator Allocator;

  SpecificBumpPtrAllocator<MCSectionCOFF> COFFAllocator;

  SpecificBumpPtrAllocator<MCSectionDXContainer> DXCAllocator;

  SpecificBumpPtrAllocator<MCSectionELF> ELFAllocator;

  SpecificBumpPtrAllocator<MCSectionMachO> MachOAllocator;

  SpecificBumpPtrAllocator<MCSectionGOFF> GOFFAllocator;

  SpecificBumpPtrAllocator<MCSectionSPIRV> SPIRVAllocator;

  SpecificBumpPtrAllocator<MCSectionWasm> WasmAllocator;

  SpecificBumpPtrAllocator<MCSectionXCOFF> XCOFFAllocator;

  SpecificBumpPtrAllocator<MCInst> MCInstAllocator;

  /// Bindings of names to symbols.

  SymbolTable Symbols;

  /// A mapping from a local label number and an instance count to a symbol.

  /// For example, in the assembly

  ///     1:

  ///     2:

  ///     1:

  /// We have three labels represented by the pairs (1, 0), (2, 0) and (1, 1)

  DenseMap<std::pair<unsigned, unsigned>, MCSymbol *> LocalSymbols;

  /// Keeps tracks of names that were used both for used declared and

  /// artificial symbols. The value is "true" if the name has been used for a

  /// non-section symbol (there can be at most one of those, plus an unlimited

  /// number of section symbols with the same name).

  StringMap<bool, BumpPtrAllocator &> UsedNames;

  /// Keeps track of labels that are used in inline assembly.

  SymbolTable InlineAsmUsedLabelNames;

  /// The next ID to dole out to an unnamed assembler temporary symbol with

  /// a given prefix.

  StringMap<unsigned> NextID;

  /// Instances of directional local labels.

  DenseMap<unsigned, MCLabel *> Instances;

  /// NextInstance() creates the next instance of the directional local label

  /// for the LocalLabelVal and adds it to the map if needed.

  unsigned NextInstance(unsigned LocalLabelVal);

  /// GetInstance() gets the current instance of the directional local label

  /// for the LocalLabelVal and adds it to the map if needed.

  unsigned GetInstance(unsigned LocalLabelVal);

  /// LLVM_BB_ADDR_MAP version to emit.

  uint8_t BBAddrMapVersion = 1;

  /// The file name of the log file from the environment variable

  /// AS_SECURE_LOG_FILE.  Which must be set before the .secure_log_unique

  /// directive is used or it is an error.

  std::string SecureLogFile;

  /// The stream that gets written to for the .secure_log_unique directive.

  std::unique_ptr<raw_fd_ostream> SecureLog;

  /// Boolean toggled when .secure_log_unique / .secure_log_reset is seen to

  /// catch errors if .secure_log_unique appears twice without

  /// .secure_log_reset appearing between them.

  bool SecureLogUsed = false;

  /// The compilation directory to use for DW_AT_comp_dir.

  SmallString<128> CompilationDir;

  /// Prefix replacement map for source file information.

  std::map<std::string, const std::string, std::greater<>> DebugPrefixMap;

  /// The main file name if passed in explicitly.

  std::string MainFileName;

  /// The dwarf file and directory tables from the dwarf .file directive.

  /// We now emit a line table for each compile unit. To reduce the prologue

  /// size of each line table, the files and directories used by each compile

  /// unit are separated.

  std::map<unsigned, MCDwarfLineTable> MCDwarfLineTablesCUMap;

  /// The current dwarf line information from the last dwarf .loc directive.

  MCDwarfLoc CurrentDwarfLoc;

  bool DwarfLocSeen = false;

  /// Generate dwarf debugging info for assembly source files.

  bool GenDwarfForAssembly = false;

  /// The current dwarf file number when generate dwarf debugging info for

  /// assembly source files.

  unsigned GenDwarfFileNumber = 0;

  /// Sections for generating the .debug_ranges and .debug_aranges sections.

  SetVector<MCSection *> SectionsForRanges;

  /// The information gathered from labels that will have dwarf label

  /// entries when generating dwarf assembly source files.

  std::vector<MCGenDwarfLabelEntry> MCGenDwarfLabelEntries;

  /// The string to embed in the debug information for the compile unit, if

  /// non-empty.

  StringRef DwarfDebugFlags;

  /// The string to embed in as the dwarf AT_producer for the compile unit, if

  /// non-empty.

  StringRef DwarfDebugProducer;

  /// The maximum version of dwarf that we should emit.

  uint16_t DwarfVersion = 4;

  /// The format of dwarf that we emit.

  dwarf::DwarfFormat DwarfFormat = dwarf::DWARF32;

  /// Honor temporary labels, this is useful for debugging semantic

  /// differences between temporary and non-temporary labels (primarily on

  /// Darwin).

  bool AllowTemporaryLabels = true;

  bool UseNamesOnTempLabels = false;

  /// The Compile Unit ID that we are currently processing.

  unsigned DwarfCompileUnitID = 0;

  /// A collection of MCPseudoProbe in the current module

  MCPseudoProbeTable PseudoProbeTable;

  // Sections are differentiated by the quadruple (section_name, group_name,

  // unique_id, link_to_symbol_name). Sections sharing the same quadruple are

  // combined into one section.

  struct ELFSectionKey {

    std::string SectionName;

    StringRef GroupName;

    StringRef LinkedToName;

    unsigned UniqueID;

    ELFSectionKey(StringRef SectionName, StringRef GroupName,

                  StringRef LinkedToName, unsigned UniqueID)

        : SectionName(SectionName), GroupName(GroupName),

          LinkedToName(LinkedToName), UniqueID(UniqueID) {}

    bool operator<(const ELFSectionKey &Other) const {

      if (SectionName != Other.SectionName)

        return SectionName < Other.SectionName;

      if (GroupName != Other.GroupName)

        return GroupName < Other.GroupName;

      if (int O = LinkedToName.compare(Other.LinkedToName))

        return O < 0;

      return UniqueID < Other.UniqueID;

    }

  };

  struct COFFSectionKey {

    std::string SectionName;

    StringRef GroupName;

    int SelectionKey;

    unsigned UniqueID;

    COFFSectionKey(StringRef SectionName, StringRef GroupName, int SelectionKey,

                   unsigned UniqueID)

        : SectionName(SectionName), GroupName(GroupName),

          SelectionKey(SelectionKey), UniqueID(UniqueID) {}

    bool operator<(const COFFSectionKey &Other) const {

      if (SectionName != Other.SectionName)

        return SectionName < Other.SectionName;

      if (GroupName != Other.GroupName)

        return GroupName < Other.GroupName;

      if (SelectionKey != Other.SelectionKey)

        return SelectionKey < Other.SelectionKey;

      return UniqueID < Other.UniqueID;

    }

  };

  struct WasmSectionKey {

    std::string SectionName;

    StringRef GroupName;

    unsigned UniqueID;

    WasmSectionKey(StringRef SectionName, StringRef GroupName,

                   unsigned UniqueID)

        : SectionName(SectionName), GroupName(GroupName), UniqueID(UniqueID) {}

    bool operator<(const WasmSectionKey &Other) const {

      if (SectionName != Other.SectionName)

        return SectionName < Other.SectionName;

      if (GroupName != Other.GroupName)

        return GroupName < Other.GroupName;

      return UniqueID < Other.UniqueID;

    }

  };

  struct XCOFFSectionKey {

    // Section name.

    std::string SectionName;

    // Section property.

    // For csect section, it is storage mapping class.

    // For debug section, it is section type flags.

    union {

      XCOFF::StorageMappingClass MappingClass;

      XCOFF::DwarfSectionSubtypeFlags DwarfSubtypeFlags;

    };

    bool IsCsect;

    XCOFFSectionKey(StringRef SectionName,

                    XCOFF::StorageMappingClass MappingClass)

        : SectionName(SectionName), MappingClass(MappingClass), IsCsect(true) {}

    XCOFFSectionKey(StringRef SectionName,

                    XCOFF::DwarfSectionSubtypeFlags DwarfSubtypeFlags)

        : SectionName(SectionName), DwarfSubtypeFlags(DwarfSubtypeFlags),

          IsCsect(false) {}

    bool operator<(const XCOFFSectionKey &Other) const {

      if (IsCsect && Other.IsCsect)

        return std::tie(SectionName, MappingClass) <

               std::tie(Other.SectionName, Other.MappingClass);

      if (IsCsect != Other.IsCsect)

        return IsCsect;

      return std::tie(SectionName, DwarfSubtypeFlags) <

             std::tie(Other.SectionName, Other.DwarfSubtypeFlags);

    }

  };

  StringMap<MCSectionMachO *> MachOUniquingMap;

  std::map<ELFSectionKey, MCSectionELF *> ELFUniquingMap;

  std::map<COFFSectionKey, MCSectionCOFF *> COFFUniquingMap;

  std::map<std::string, MCSectionGOFF *> GOFFUniquingMap;

  std::map<WasmSectionKey, MCSectionWasm *> WasmUniquingMap;

  std::map<XCOFFSectionKey, MCSectionXCOFF *> XCOFFUniquingMap;

  StringMap<MCSectionDXContainer *> DXCUniquingMap;

  StringMap<bool> RelSecNames;

  SpecificBumpPtrAllocator<MCSubtargetInfo> MCSubtargetAllocator;

  /// Do automatic reset in destructor

  bool AutoReset;

  MCTargetOptions const *TargetOptions;

  bool HadError = false;

  void reportCommon(SMLoc Loc,

                    std::function<void(SMDiagnostic &, const SourceMgr *)>);

  MCSymbol *createSymbolImpl(const StringMapEntry<bool> *Name,

                             bool CanBeUnnamed);

  MCSymbol *createSymbol(StringRef Name, bool AlwaysAddSuffix,

                         bool IsTemporary);

  MCSymbol *getOrCreateDirectionalLocalSymbol(unsigned LocalLabelVal,

                                              unsigned Instance);

  MCSectionELF *createELFSectionImpl(StringRef Section, unsigned Type,

                                     unsigned Flags, SectionKind K,

                                     unsigned EntrySize,

                                     const MCSymbolELF *Group, bool IsComdat,

                                     unsigned UniqueID,

                                     const MCSymbolELF *LinkedToSym);

  MCSymbolXCOFF *createXCOFFSymbolImpl(const StringMapEntry<bool> *Name,

                                       bool IsTemporary);

  /// Map of currently defined macros.

  StringMap<MCAsmMacro> MacroMap;

  struct ELFEntrySizeKey {

    std::string SectionName;

    unsigned Flags;

    unsigned EntrySize;

    ELFEntrySizeKey(StringRef SectionName, unsigned Flags, unsigned EntrySize)

        : SectionName(SectionName), Flags(Flags), EntrySize(EntrySize) {}

    bool operator<(const ELFEntrySizeKey &Other) const {

      if (SectionName != Other.SectionName)

        return SectionName < Other.SectionName;

      if (Flags != Other.Flags)

        return Flags < Other.Flags;

      return EntrySize < Other.EntrySize;

    }

  };

  // Symbols must be assigned to a section with a compatible entry size and

  // flags. This map is used to assign unique IDs to sections to distinguish

  // between sections with identical names but incompatible entry sizes and/or

  // flags. This can occur when a symbol is explicitly assigned to a section,

  // e.g. via __attribute__((section("myname"))).

  std::map<ELFEntrySizeKey, unsigned> ELFEntrySizeMap;

  // This set is used to record the generic mergeable section names seen.

  // These are sections that are created as mergeable e.g. .debug_str. We need

  // to avoid assigning non-mergeable symbols to these sections. It is used

  // to prevent non-mergeable symbols being explicitly assigned  to mergeable

  // sections (e.g. via _attribute_((section("myname")))).

  DenseSet<StringRef> ELFSeenGenericMergeableSections;

public:

  explicit MCContext(const Triple &TheTriple, const MCAsmInfo *MAI,

                     const MCRegisterInfo *MRI, const MCSubtargetInfo *MSTI,

                     const SourceMgr *Mgr = nullptr,

                     MCTargetOptions const *TargetOpts = nullptr,

                     bool DoAutoReset = true,

                     StringRef Swift5ReflSegmentName = {});

  MCContext(const MCContext &) = delete;

  MCContext &operator=(const MCContext &) = delete;

  ~MCContext();

  Environment getObjectFileType() const { return Env; }

  const StringRef &getSwift5ReflectionSegmentName() const {

    return Swift5ReflectionSegmentName;

  }

  const Triple &getTargetTriple() const { return TT; }

  const SourceMgr *getSourceManager() const { return SrcMgr; }

  void initInlineSourceManager();

  SourceMgr *getInlineSourceManager() { return InlineSrcMgr.get(); }

  std::vector<const MDNode *> &getLocInfos() { return LocInfos; }

  void setDiagnosticHandler(DiagHandlerTy DiagHandler) {

    this->DiagHandler = DiagHandler;

  }

  void setObjectFileInfo(const MCObjectFileInfo *Mofi) { MOFI = Mofi; }

  const MCAsmInfo *getAsmInfo() const { return MAI; }

  const MCRegisterInfo *getRegisterInfo() const { return MRI; }

  const MCObjectFileInfo *getObjectFileInfo() const { return MOFI; }

  const MCSubtargetInfo *getSubtargetInfo() const { return MSTI; }

  CodeViewContext &getCVContext();

  void setAllowTemporaryLabels(bool Value) { AllowTemporaryLabels = Value; }

  void setUseNamesOnTempLabels(bool Value) { UseNamesOnTempLabels = Value; }

  /// \name Module Lifetime Management

  /// @{

  /// reset - return object to right after construction state to prepare

  /// to process a new module

  void reset();

  /// @}

  /// \name McInst Management

  /// Create and return a new MC instruction.

  MCInst *createMCInst();

  /// \name Symbol Management

  /// @{

  /// Create and return a new linker temporary symbol with a unique but

  /// unspecified name.

  MCSymbol *createLinkerPrivateTempSymbol();

  /// Create a temporary symbol with a unique name. The name will be omitted

  /// in the symbol table if UseNamesOnTempLabels is false (default except

  /// MCAsmStreamer). The overload without Name uses an unspecified name.

  MCSymbol *createTempSymbol();

  MCSymbol *createTempSymbol(const Twine &Name, bool AlwaysAddSuffix = true);

  /// Create a temporary symbol with a unique name whose name cannot be

  /// omitted in the symbol table. This is rarely used.

  MCSymbol *createNamedTempSymbol();

  MCSymbol *createNamedTempSymbol(const Twine &Name);

  /// Create the definition of a directional local symbol for numbered label

  /// (used for "1:" definitions).

  MCSymbol *createDirectionalLocalSymbol(unsigned LocalLabelVal);

  /// Create and return a directional local symbol for numbered label (used

  /// for "1b" or 1f" references).

  MCSymbol *getDirectionalLocalSymbol(unsigned LocalLabelVal, bool Before);

  /// Lookup the symbol inside with the specified \p Name.  If it exists,

  /// return it.  If not, create a forward reference and return it.

  ///

  /// \param Name - The symbol name, which must be unique across all symbols.

  MCSymbol *getOrCreateSymbol(const Twine &Name);

  /// Gets a symbol that will be defined to the final stack offset of a local

  /// variable after codegen.

  ///

  /// \param Idx - The index of a local variable passed to \@llvm.localescape.

  MCSymbol *getOrCreateFrameAllocSymbol(StringRef FuncName, unsigned Idx);

  MCSymbol *getOrCreateParentFrameOffsetSymbol(StringRef FuncName);

  MCSymbol *getOrCreateLSDASymbol(StringRef FuncName);

  /// Get the symbol for \p Name, or null.

  MCSymbol *lookupSymbol(const Twine &Name) const;

  /// Set value for a symbol.

  void setSymbolValue(MCStreamer &Streamer, StringRef Sym, uint64_t Val);

  /// getSymbols - Get a reference for the symbol table for clients that

  /// want to, for example, iterate over all symbols. 'const' because we

  /// still want any modifications to the table itself to use the MCContext

  /// APIs.

  const SymbolTable &getSymbols() const { return Symbols; }

  /// isInlineAsmLabel - Return true if the name is a label referenced in

  /// inline assembly.

  MCSymbol *getInlineAsmLabel(StringRef Name) const {

    return InlineAsmUsedLabelNames.lookup(Name);

  }

  /// registerInlineAsmLabel - Records that the name is a label referenced in

  /// inline assembly.

  void registerInlineAsmLabel(MCSymbol *Sym);

  /// @}

  /// \name Section Management

  /// @{

  enum : unsigned {

    /// Pass this value as the UniqueID during section creation to get the

    /// generic section with the given name and characteristics. The usual

    /// sections such as .text use this ID.

    GenericSectionID = ~0U

  };

  /// Return the MCSection for the specified mach-o section.  This requires

  /// the operands to be valid.

  MCSectionMachO *getMachOSection(StringRef Segment, StringRef Section,

                                  unsigned TypeAndAttributes,

                                  unsigned Reserved2, SectionKind K,

                                  const char *BeginSymName = nullptr);

  MCSectionMachO *getMachOSection(StringRef Segment, StringRef Section,

                                  unsigned TypeAndAttributes, SectionKind K,

                                  const char *BeginSymName = nullptr) {

    return getMachOSection(Segment, Section, TypeAndAttributes, 0, K,

                           BeginSymName);

  }

  MCSectionELF *getELFSection(const Twine &Section, unsigned Type,

                              unsigned Flags) {

    return getELFSection(Section, Type, Flags, 0, "", false);

  }

  MCSectionELF *getELFSection(const Twine &Section, unsigned Type,

                              unsigned Flags, unsigned EntrySize) {

    return getELFSection(Section, Type, Flags, EntrySize, "", false,

                         MCSection::NonUniqueID, nullptr);

  }

  MCSectionELF *getELFSection(const Twine &Section, unsigned Type,

                              unsigned Flags, unsigned EntrySize,

                              const Twine &Group, bool IsComdat) {

    return getELFSection(Section, Type, Flags, EntrySize, Group, IsComdat,

                         MCSection::NonUniqueID, nullptr);

  }

  MCSectionELF *getELFSection(const Twine &Section, unsigned Type,

                              unsigned Flags, unsigned EntrySize,

                              const Twine &Group, bool IsComdat,

                              unsigned UniqueID,

                              const MCSymbolELF *LinkedToSym);

  MCSectionELF *getELFSection(const Twine &Section, unsigned Type,

                              unsigned Flags, unsigned EntrySize,

                              const MCSymbolELF *Group, bool IsComdat,

                              unsigned UniqueID,

                              const MCSymbolELF *LinkedToSym);

  /// Get a section with the provided group identifier. This section is

  /// named by concatenating \p Prefix with '.' then \p Suffix. The \p Type

  /// describes the type of the section and \p Flags are used to further

  /// configure this named section.

  MCSectionELF *getELFNamedSection(const Twine &Prefix, const Twine &Suffix,

                                   unsigned Type, unsigned Flags,

                                   unsigned EntrySize = 0);

  MCSectionELF *createELFRelSection(const Twine &Name, unsigned Type,

                                    unsigned Flags, unsigned EntrySize,

                                    const MCSymbolELF *Group,

                                    const MCSectionELF *RelInfoSection);

  MCSectionELF *createELFGroupSection(const MCSymbolELF *Group, bool IsComdat);

  void recordELFMergeableSectionInfo(StringRef SectionName, unsigned Flags,

                                     unsigned UniqueID, unsigned EntrySize);

  bool isELFImplicitMergeableSectionNamePrefix(StringRef Name);

  bool isELFGenericMergeableSection(StringRef Name);

  /// Return the unique ID of the section with the given name, flags and entry

  /// size, if it exists.

  std::optional<unsigned> getELFUniqueIDForEntsize(StringRef SectionName,

                                                   unsigned Flags,

                                                   unsigned EntrySize);

  MCSectionGOFF *getGOFFSection(StringRef Section, SectionKind Kind,

                                MCSection *Parent, const MCExpr *SubsectionId);

  MCSectionCOFF *getCOFFSection(StringRef Section, unsigned Characteristics,

                                SectionKind Kind, StringRef COMDATSymName,

                                int Selection,

                                unsigned UniqueID = GenericSectionID,

                                const char *BeginSymName = nullptr);

  MCSectionCOFF *getCOFFSection(StringRef Section, unsigned Characteristics,

                                SectionKind Kind,

                                const char *BeginSymName = nullptr);

  /// Gets or creates a section equivalent to Sec that is associated with the

  /// section containing KeySym. For example, to create a debug info section

  /// associated with an inline function, pass the normal debug info section

  /// as Sec and the function symbol as KeySym.

  MCSectionCOFF *

  getAssociativeCOFFSection(MCSectionCOFF *Sec, const MCSymbol *KeySym,

                            unsigned UniqueID = GenericSectionID);

  MCSectionSPIRV *getSPIRVSection();

  MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K,

                                unsigned Flags = 0) {

    return getWasmSection(Section, K, Flags, nullptr);

  }

  MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K,

                                unsigned Flags, const char *BeginSymName) {

    return getWasmSection(Section, K, Flags, "", ~0, BeginSymName);

  }

  MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K,

                                unsigned Flags, const Twine &Group,

                                unsigned UniqueID) {

    return getWasmSection(Section, K, Flags, Group, UniqueID, nullptr);

  }

  MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K,

                                unsigned Flags, const Twine &Group,

                                unsigned UniqueID, const char *BeginSymName);

  MCSectionWasm *getWasmSection(const Twine &Section, SectionKind K,

                                unsigned Flags, const MCSymbolWasm *Group,

                                unsigned UniqueID, const char *BeginSymName);

  /// Get the section for the provided Section name

  MCSectionDXContainer *getDXContainerSection(StringRef Section, SectionKind K);

  bool hasXCOFFSection(StringRef Section,

                       XCOFF::CsectProperties CsectProp) const;

  MCSectionXCOFF *getXCOFFSection(

      StringRef Section, SectionKind K,

      std::optional<XCOFF::CsectProperties> CsectProp = std::nullopt,

      bool MultiSymbolsAllowed = false, const char *BeginSymName = nullptr,

      std::optional<XCOFF::DwarfSectionSubtypeFlags> DwarfSubtypeFlags =

          std::nullopt);

  // Create and save a copy of STI and return a reference to the copy.

  MCSubtargetInfo &getSubtargetCopy(const MCSubtargetInfo &STI);

  uint8_t getBBAddrMapVersion() const { return BBAddrMapVersion; }

  /// @}

  /// \name Dwarf Management

  /// @{

  /// Get the compilation directory for DW_AT_comp_dir

  /// The compilation directory should be set with \c setCompilationDir before

  /// calling this function. If it is unset, an empty string will be returned.

  StringRef getCompilationDir() const { return CompilationDir; }

  /// Set the compilation directory for DW_AT_comp_dir

  void setCompilationDir(StringRef S) { CompilationDir = S.str(); }

  /// Add an entry to the debug prefix map.

  void addDebugPrefixMapEntry(const std::string &From, const std::string &To);

  /// Remap one path in-place as per the debug prefix map.

  void remapDebugPath(SmallVectorImpl<char> &Path);

  // Remaps all debug directory paths in-place as per the debug prefix map.

  void RemapDebugPaths();

  /// Get the main file name for use in error messages and debug

  /// info. This can be set to ensure we've got the correct file name

  /// after preprocessing or for -save-temps.

  const std::string &getMainFileName() const { return MainFileName; }

  /// Set the main file name and override the default.

  void setMainFileName(StringRef S) { MainFileName = std::string(S); }

  /// Creates an entry in the dwarf file and directory tables.

  Expected<unsigned> getDwarfFile(StringRef Directory, StringRef FileName,

                                  unsigned FileNumber,

                                  std::optional<MD5::MD5Result> Checksum,

                                  std::optional<StringRef> Source,

                                  unsigned CUID);

  bool isValidDwarfFileNumber(unsigned FileNumber, unsigned CUID = 0);

  const std::map<unsigned, MCDwarfLineTable> &getMCDwarfLineTables() const {

    return MCDwarfLineTablesCUMap;

  }

  MCDwarfLineTable &getMCDwarfLineTable(unsigned CUID) {

    return MCDwarfLineTablesCUMap[CUID];

  }

  const MCDwarfLineTable &getMCDwarfLineTable(unsigned CUID) const {

    auto I = MCDwarfLineTablesCUMap.find(CUID);

    assert(I != MCDwarfLineTablesCUMap.end());

    return I->second;

  }

  const SmallVectorImpl<MCDwarfFile> &getMCDwarfFiles(unsigned CUID = 0) {

    return getMCDwarfLineTable(CUID).getMCDwarfFiles();

  }

  const SmallVectorImpl<std::string> &getMCDwarfDirs(unsigned CUID = 0) {

    return getMCDwarfLineTable(CUID).getMCDwarfDirs();

  }

  unsigned getDwarfCompileUnitID() { return DwarfCompileUnitID; }

  void setDwarfCompileUnitID(unsigned CUIndex) { DwarfCompileUnitID = CUIndex; }

  /// Specifies the "root" file and directory of the compilation unit.

  /// These are "file 0" and "directory 0" in DWARF v5.

  void setMCLineTableRootFile(unsigned CUID, StringRef CompilationDir,

                              StringRef Filename,

                              std::optional<MD5::MD5Result> Checksum,

                              std::optional<StringRef> Source) {

    getMCDwarfLineTable(CUID).setRootFile(CompilationDir, Filename, Checksum,

                                          Source);

  }

  /// Reports whether MD5 checksum usage is consistent (all-or-none).

  bool isDwarfMD5UsageConsistent(unsigned CUID) const {

    return getMCDwarfLineTable(CUID).isMD5UsageConsistent();

  }

  /// Saves the information from the currently parsed dwarf .loc directive

  /// and sets DwarfLocSeen.  When the next instruction is assembled an entry

  /// in the line number table with this information and the address of the

  /// instruction will be created.

  void setCurrentDwarfLoc(unsigned FileNum, unsigned Line, unsigned Column,

                          unsigned Flags, unsigned Isa,

                          unsigned Discriminator) {

    CurrentDwarfLoc.setFileNum(FileNum);

    CurrentDwarfLoc.setLine(Line);

    CurrentDwarfLoc.setColumn(Column);

    CurrentDwarfLoc.setFlags(Flags);

    CurrentDwarfLoc.setIsa(Isa);

    CurrentDwarfLoc.setDiscriminator(Discriminator);

    DwarfLocSeen = true;

  }

  void clearDwarfLocSeen() { DwarfLocSeen = false; }

  bool getDwarfLocSeen() { return DwarfLocSeen; }

  const MCDwarfLoc &getCurrentDwarfLoc() { return CurrentDwarfLoc; }

  bool getGenDwarfForAssembly() { return GenDwarfForAssembly; }

  void setGenDwarfForAssembly(bool Value) { GenDwarfForAssembly = Value; }

  unsigned getGenDwarfFileNumber() { return GenDwarfFileNumber; }

  EmitDwarfUnwindType emitDwarfUnwindInfo() const;

  void setGenDwarfFileNumber(unsigned FileNumber) {

    GenDwarfFileNumber = FileNumber;

  }

  /// Specifies information about the "root file" for assembler clients

  /// (e.g., llvm-mc). Assumes compilation dir etc. have been set up.

  void setGenDwarfRootFile(StringRef FileName, StringRef Buffer);

  const SetVector<MCSection *> &getGenDwarfSectionSyms() {

    return SectionsForRanges;

  }

  bool addGenDwarfSection(MCSection *Sec) {

    return SectionsForRanges.insert(Sec);

  }

  void finalizeDwarfSections(MCStreamer &MCOS);

  const std::vector<MCGenDwarfLabelEntry> &getMCGenDwarfLabelEntries() const {

    return MCGenDwarfLabelEntries;

  }

  void addMCGenDwarfLabelEntry(const MCGenDwarfLabelEntry &E) {

    MCGenDwarfLabelEntries.push_back(E);

  }

  void setDwarfDebugFlags(StringRef S) { DwarfDebugFlags = S; }

  StringRef getDwarfDebugFlags() { return DwarfDebugFlags; }

  void setDwarfDebugProducer(StringRef S) { DwarfDebugProducer = S; }

  StringRef getDwarfDebugProducer() { return DwarfDebugProducer; }

  void setDwarfFormat(dwarf::DwarfFormat f) { DwarfFormat = f; }

  dwarf::DwarfFormat getDwarfFormat() const { return DwarfFormat; }

  void setDwarfVersion(uint16_t v) { DwarfVersion = v; }

  uint16_t getDwarfVersion() const { return DwarfVersion; }

  /// @}

  StringRef getSecureLogFile() { return SecureLogFile; }

  raw_fd_ostream *getSecureLog() { return SecureLog.get(); }

  void setSecureLog(std::unique_ptr<raw_fd_ostream> Value) {