[MCObjectFileInfo] Fix uninitialized variable warnings. NFCI.

protected:

  /// True if .comm supports alignment.  This is a hack for as long as we

  /// support 10.4 Tiger, whose assembler doesn't support alignment on comm.

  bool CommDirectiveSupportsAlignment;

  bool CommDirectiveSupportsAlignment = false;

  /// True if target object file supports a weak_definition of constant 0 for an

  /// omitted EH frame.

  bool SupportsWeakOmittedEHFrame;

  bool SupportsWeakOmittedEHFrame = false;

  /// True if the target object file supports emitting a compact unwind section

  /// without an associated EH frame section.

  bool SupportsCompactUnwindWithoutEHFrame;

  bool SupportsCompactUnwindWithoutEHFrame = false;

  /// OmitDwarfIfHaveCompactUnwind - True if the target object file

  /// supports having some functions with compact unwind and other with

  /// dwarf unwind.

  bool OmitDwarfIfHaveCompactUnwind;

  bool OmitDwarfIfHaveCompactUnwind = false;

  /// FDE CFI encoding. Controls the encoding of the begin label in the

  /// .eh_frame section. Unlike the LSDA encoding, personality encoding, and

  unsigned FDECFIEncoding = 0;

  /// Compact unwind encoding indicating that we should emit only an EH frame.

  unsigned CompactUnwindDwarfEHFrameOnly;

  unsigned CompactUnwindDwarfEHFrameOnly = 0;

  /// Section directive for standard text.

  MCSection *TextSection;

  MCSection *TextSection = nullptr;

  /// Section directive for standard data.

  MCSection *DataSection;

  MCSection *DataSection = nullptr;

  /// Section that is default initialized to zero.

  MCSection *BSSSection;

  MCSection *BSSSection = nullptr;

  /// Section that is readonly and can contain arbitrary initialized data.

  /// Targets are not required to have a readonly section. If they don't,

  /// various bits of code will fall back to using the data section for

  /// constants.

  MCSection *ReadOnlySection;

  MCSection *ReadOnlySection = nullptr;

  /// If exception handling is supported by the target, this is the section the

  /// Language Specific Data Area information is emitted to.

  MCSection *LSDASection;

  MCSection *LSDASection = nullptr;

  /// If exception handling is supported by the target and the target can

  /// support a compact representation of the CIE and FDE, this is the section

  /// to emit them into.

  MCSection *CompactUnwindSection;

  MCSection *CompactUnwindSection = nullptr;

  // Dwarf sections for debug info.  If a target supports debug info, these must

  // be set.

  MCSection *DwarfAbbrevSection;

  MCSection *DwarfInfoSection;

  MCSection *DwarfLineSection;

  MCSection *DwarfLineStrSection;

  MCSection *DwarfFrameSection;

  MCSection *DwarfPubTypesSection;

  const MCSection *DwarfDebugInlineSection;

  MCSection *DwarfStrSection;

  MCSection *DwarfLocSection;

  MCSection *DwarfARangesSection;

  MCSection *DwarfRangesSection;

  MCSection *DwarfMacinfoSection;

  MCSection *DwarfAbbrevSection = nullptr;

  MCSection *DwarfInfoSection = nullptr;

  MCSection *DwarfLineSection = nullptr;

  MCSection *DwarfLineStrSection = nullptr;

  MCSection *DwarfFrameSection = nullptr;

  MCSection *DwarfPubTypesSection = nullptr;

  const MCSection *DwarfDebugInlineSection = nullptr;

  MCSection *DwarfStrSection = nullptr;

  MCSection *DwarfLocSection = nullptr;

  MCSection *DwarfARangesSection = nullptr;

  MCSection *DwarfRangesSection = nullptr;

  MCSection *DwarfMacinfoSection = nullptr;

  // The pubnames section is no longer generated by default.  The generation

  // can be enabled by a compiler flag.

  MCSection *DwarfPubNamesSection;

  MCSection *DwarfPubNamesSection = nullptr;

  /// Accelerator table sections. DwarfDebugNamesSection is the DWARF v5

  /// accelerator table, while DwarfAccelNamesSection, DwarfAccelObjCSection,

  /// DwarfAccelNamespaceSection, DwarfAccelTypesSection are pre-DWARF v5

  /// extensions.

  MCSection *DwarfDebugNamesSection;

  MCSection *DwarfAccelNamesSection;

  MCSection *DwarfAccelObjCSection;

  MCSection *DwarfAccelNamespaceSection;

  MCSection *DwarfAccelTypesSection;

  MCSection *DwarfDebugNamesSection = nullptr;

  MCSection *DwarfAccelNamesSection = nullptr;

  MCSection *DwarfAccelObjCSection = nullptr;

  MCSection *DwarfAccelNamespaceSection = nullptr;

  MCSection *DwarfAccelTypesSection = nullptr;

  // These are used for the Fission separate debug information files.

  MCSection *DwarfInfoDWOSection;

  MCSection *DwarfTypesDWOSection;

  MCSection *DwarfAbbrevDWOSection;

  MCSection *DwarfStrDWOSection;

  MCSection *DwarfLineDWOSection;

  MCSection *DwarfLocDWOSection;

  MCSection *DwarfStrOffDWOSection;

  MCSection *DwarfInfoDWOSection = nullptr;

  MCSection *DwarfTypesDWOSection = nullptr;

  MCSection *DwarfAbbrevDWOSection = nullptr;

  MCSection *DwarfStrDWOSection = nullptr;

  MCSection *DwarfLineDWOSection = nullptr;

  MCSection *DwarfLocDWOSection = nullptr;

  MCSection *DwarfStrOffDWOSection = nullptr;

  /// The DWARF v5 string offset and address table sections.

  MCSection *DwarfStrOffSection;

  MCSection *DwarfAddrSection;

  MCSection *DwarfStrOffSection = nullptr;

  MCSection *DwarfAddrSection = nullptr;

  /// The DWARF v5 range list section.

  MCSection *DwarfRnglistsSection;

  MCSection *DwarfRnglistsSection = nullptr;

  /// The DWARF v5 locations list section.

  MCSection *DwarfLoclistsSection;

  MCSection *DwarfLoclistsSection = nullptr;

  /// The DWARF v5 range list section for fission.

  MCSection *DwarfRnglistsDWOSection;

  MCSection *DwarfRnglistsDWOSection = nullptr;

  // These are for Fission DWP files.

  MCSection *DwarfCUIndexSection;

  MCSection *DwarfTUIndexSection;

  MCSection *DwarfCUIndexSection = nullptr;

  MCSection *DwarfTUIndexSection = nullptr;

  /// Section for newer gnu pubnames.

  MCSection *DwarfGnuPubNamesSection;

  MCSection *DwarfGnuPubNamesSection = nullptr;

  /// Section for newer gnu pubtypes.

  MCSection *DwarfGnuPubTypesSection;

  MCSection *DwarfGnuPubTypesSection = nullptr;

  // Section for Swift AST

  MCSection *DwarfSwiftASTSection;

  MCSection *DwarfSwiftASTSection = nullptr;

  MCSection *COFFDebugSymbolsSection;

  MCSection *COFFDebugTypesSection;

  MCSection *COFFGlobalTypeHashesSection;

  MCSection *COFFDebugSymbolsSection = nullptr;

  MCSection *COFFDebugTypesSection = nullptr;

  MCSection *COFFGlobalTypeHashesSection = nullptr;

  /// Extra TLS Variable Data section.

  ///

  /// If the target needs to put additional information for a TLS variable,

  /// it'll go here.

  MCSection *TLSExtraDataSection;

  MCSection *TLSExtraDataSection = nullptr;

  /// Section directive for Thread Local data. ELF, MachO, COFF, and Wasm.

  MCSection *TLSDataSection; // Defaults to ".tdata".

  MCSection *TLSDataSection = nullptr; // Defaults to ".tdata".

  /// Section directive for Thread Local uninitialized data.

  ///

  /// Null if this target doesn't support a BSS section. ELF and MachO only.

  MCSection *TLSBSSSection; // Defaults to ".tbss".

  MCSection *TLSBSSSection = nullptr; // Defaults to ".tbss".

  /// StackMap section.

  MCSection *StackMapSection;

  MCSection *StackMapSection = nullptr;

  /// FaultMap section.

  MCSection *FaultMapSection;

  MCSection *FaultMapSection = nullptr;

  /// Remarks section.

  MCSection *RemarksSection;

  MCSection *RemarksSection = nullptr;

  /// EH frame section.

  ///

  /// It is initialized on demand so it can be overwritten (with uniquing).

  MCSection *EHFrameSection;

  MCSection *EHFrameSection = nullptr;

  /// Section containing metadata on function stack sizes.

  MCSection *StackSizesSection;

  MCSection *StackSizesSection = nullptr;

  mutable DenseMap<const MCSymbol *, unsigned> StackSizesUniquing;

  // ELF specific sections.

  MCSection *DataRelROSection;

  MCSection *MergeableConst4Section;

  MCSection *MergeableConst8Section;

  MCSection *MergeableConst16Section;

  MCSection *MergeableConst32Section;

  MCSection *DataRelROSection = nullptr;

  MCSection *MergeableConst4Section = nullptr;

  MCSection *MergeableConst8Section = nullptr;

  MCSection *MergeableConst16Section = nullptr;

  MCSection *MergeableConst32Section = nullptr;

  // MachO specific sections.

  ///

  /// Contains the source code name of the variable, visibility and a pointer to

  /// the initial value (.tdata or .tbss).

  MCSection *TLSTLVSection; // Defaults to ".tlv".

  MCSection *TLSTLVSection = nullptr; // Defaults to ".tlv".

  /// Section for thread local data initialization functions.

  const MCSection *TLSThreadInitSection; // Defaults to ".thread_init_func".

  MCSection *CStringSection;

  MCSection *UStringSection;

  MCSection *TextCoalSection;

  MCSection *ConstTextCoalSection;

  MCSection *ConstDataSection;

  MCSection *DataCoalSection;

  MCSection *ConstDataCoalSection;

  MCSection *DataCommonSection;

  MCSection *DataBSSSection;

  MCSection *FourByteConstantSection;

  MCSection *EightByteConstantSection;

  MCSection *SixteenByteConstantSection;

  MCSection *LazySymbolPointerSection;

  MCSection *NonLazySymbolPointerSection;

  MCSection *ThreadLocalPointerSection;

   // Defaults to ".thread_init_func".

  const MCSection *TLSThreadInitSection = nullptr;

  MCSection *CStringSection = nullptr;

  MCSection *UStringSection = nullptr;

  MCSection *TextCoalSection = nullptr;

  MCSection *ConstTextCoalSection = nullptr;

  MCSection *ConstDataSection = nullptr;

  MCSection *DataCoalSection = nullptr;

  MCSection *ConstDataCoalSection = nullptr;

  MCSection *DataCommonSection = nullptr;

  MCSection *DataBSSSection = nullptr;

  MCSection *FourByteConstantSection = nullptr;

  MCSection *EightByteConstantSection = nullptr;

  MCSection *SixteenByteConstantSection = nullptr;

  MCSection *LazySymbolPointerSection = nullptr;

  MCSection *NonLazySymbolPointerSection = nullptr;

  MCSection *ThreadLocalPointerSection = nullptr;

  /// COFF specific sections.

  MCSection *DrectveSection;

  MCSection *PDataSection;

  MCSection *XDataSection;

  MCSection *SXDataSection;

  MCSection *GFIDsSection;

  MCSection *GLJMPSection;

  MCSection *DrectveSection = nullptr;

  MCSection *PDataSection = nullptr;

  MCSection *XDataSection = nullptr;

  MCSection *SXDataSection = nullptr;

  MCSection *GFIDsSection = nullptr;

  MCSection *GLJMPSection = nullptr;

public:

  void InitMCObjectFileInfo(const Triple &TT, bool PIC, MCContext &ctx,

private:

  Environment Env;

  bool PositionIndependent;

  MCContext *Ctx;

  bool PositionIndependent = false;

  MCContext *Ctx = nullptr;

  Triple TT;

  VersionTuple SDKVersion;