| //===-- llvm/MC/MCAsmInfo.h - Asm info --------------------------*- 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 contains a class to be used as the basis for target specific |
| // asm writers. This class primarily takes care of global printing constants, |
| // which are used in very similar ways across all targets. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_MC_MCASMINFO_H |
| #define LLVM_MC_MCASMINFO_H |
| |
| #include "llvm/ADT/StringRef.h" |
| #include "llvm/MC/MCDirectives.h" |
| #include "llvm/MC/MCTargetOptions.h" |
| #include <vector> |
| |
| namespace llvm { |
| |
| class MCContext; |
| class MCCFIInstruction; |
| class MCExpr; |
| class MCSection; |
| class MCStreamer; |
| class MCSubtargetInfo; |
| class MCSymbol; |
| |
| namespace WinEH { |
| |
| enum class EncodingType { |
| Invalid, /// Invalid |
| Alpha, /// Windows Alpha |
| Alpha64, /// Windows AXP64 |
| ARM, /// Windows NT (Windows on ARM) |
| CE, /// Windows CE ARM, PowerPC, SH3, SH4 |
| Itanium, /// Windows x64, Windows Itanium (IA-64) |
| X86, /// Windows x86, uses no CFI, just EH tables |
| MIPS = Alpha, |
| }; |
| |
| } // end namespace WinEH |
| |
| namespace LCOMM { |
| |
| enum LCOMMType { NoAlignment, ByteAlignment, Log2Alignment }; |
| |
| } // end namespace LCOMM |
| |
| /// This class is intended to be used as a base class for asm |
| /// properties and features specific to the target. |
| class MCAsmInfo { |
| public: |
| /// Assembly character literal syntax types. |
| enum AsmCharLiteralSyntax { |
| ACLS_Unknown, /// Unknown; character literals not used by LLVM for this |
| /// target. |
| ACLS_SingleQuotePrefix, /// The desired character is prefixed by a single |
| /// quote, e.g., `'A`. |
| }; |
| |
| protected: |
| //===------------------------------------------------------------------===// |
| // Properties to be set by the target writer, used to configure asm printer. |
| // |
| |
| /// Code pointer size in bytes. Default is 4. |
| unsigned CodePointerSize = 4; |
| |
| /// Size of the stack slot reserved for callee-saved registers, in bytes. |
| /// Default is same as pointer size. |
| unsigned CalleeSaveStackSlotSize = 4; |
| |
| /// True if target is little endian. Default is true. |
| bool IsLittleEndian = true; |
| |
| /// True if target stack grow up. Default is false. |
| bool StackGrowsUp = false; |
| |
| /// True if this target has the MachO .subsections_via_symbols directive. |
| /// Default is false. |
| bool HasSubsectionsViaSymbols = false; |
| |
| /// True if this is a MachO target that supports the macho-specific .zerofill |
| /// directive for emitting BSS Symbols. Default is false. |
| bool HasMachoZeroFillDirective = false; |
| |
| /// True if this is a MachO target that supports the macho-specific .tbss |
| /// directive for emitting thread local BSS Symbols. Default is false. |
| bool HasMachoTBSSDirective = false; |
| |
| /// True if this is a non-GNU COFF target. The COFF port of the GNU linker |
| /// doesn't handle associative comdats in the way that we would like to use |
| /// them. |
| bool HasCOFFAssociativeComdats = false; |
| |
| /// True if this is a non-GNU COFF target. For GNU targets, we don't generate |
| /// constants into comdat sections. |
| bool HasCOFFComdatConstants = false; |
| |
| /// True if this is an XCOFF target that supports visibility attributes as |
| /// part of .global, .weak, .extern, and .comm. Default is false. |
| bool HasVisibilityOnlyWithLinkage = false; |
| |
| /// This is the maximum possible length of an instruction, which is needed to |
| /// compute the size of an inline asm. Defaults to 4. |
| unsigned MaxInstLength = 4; |
| |
| /// Every possible instruction length is a multiple of this value. Factored |
| /// out in .debug_frame and .debug_line. Defaults to 1. |
| unsigned MinInstAlignment = 1; |
| |
| /// The '$' token, when not referencing an identifier or constant, refers to |
| /// the current PC. Defaults to false. |
| bool DollarIsPC = false; |
| |
| /// Allow '.' token, when not referencing an identifier or constant, to refer |
| /// to the current PC. Defaults to true. |
| bool DotIsPC = true; |
| |
| /// Whether the '*' token refers to the current PC. This is used for the |
| /// HLASM dialect. |
| bool StarIsPC = false; |
| |
| /// This string, if specified, is used to separate instructions from each |
| /// other when on the same line. Defaults to ';' |
| const char *SeparatorString; |
| |
| /// This indicates the comment string used by the assembler. Defaults to |
| /// "#" |
| StringRef CommentString; |
| |
| /// This indicates whether the comment string is only accepted as a comment |
| /// at the beginning of statements. Defaults to false. |
| bool RestrictCommentStringToStartOfStatement = false; |
| |
| /// This indicates whether to allow additional "comment strings" to be lexed |
| /// as a comment. Setting this attribute to true, will ensure that C-style |
| /// line comments (// ..), C-style block comments (/* .. */), and "#" are |
| /// all treated as comments in addition to the string specified by the |
| /// CommentString attribute. |
| /// Default is true. |
| bool AllowAdditionalComments = true; |
| |
| /// Should we emit the '\t' as the starting indentation marker for GNU inline |
| /// asm statements. Defaults to true. |
| bool EmitGNUAsmStartIndentationMarker = true; |
| |
| /// This is appended to emitted labels. Defaults to ":" |
| const char *LabelSuffix; |
| |
| /// Emit labels in purely upper case. Defaults to false. |
| bool EmitLabelsInUpperCase = false; |
| |
| // Print the EH begin symbol with an assignment. Defaults to false. |
| bool UseAssignmentForEHBegin = false; |
| |
| // Do we need to create a local symbol for .size? |
| bool NeedsLocalForSize = false; |
| |
| /// This prefix is used for globals like constant pool entries that are |
| /// completely private to the .s file and should not have names in the .o |
| /// file. Defaults to "L" |
| StringRef PrivateGlobalPrefix; |
| |
| /// This prefix is used for labels for basic blocks. Defaults to the same as |
| /// PrivateGlobalPrefix. |
| StringRef PrivateLabelPrefix; |
| |
| /// This prefix is used for symbols that should be passed through the |
| /// assembler but be removed by the linker. This is 'l' on Darwin, currently |
| /// used for some ObjC metadata. The default of "" meast that for this system |
| /// a plain private symbol should be used. Defaults to "". |
| StringRef LinkerPrivateGlobalPrefix; |
| |
| /// If these are nonempty, they contain a directive to emit before and after |
| /// an inline assembly statement. Defaults to "#APP\n", "#NO_APP\n" |
| const char *InlineAsmStart; |
| const char *InlineAsmEnd; |
| |
| /// These are assembly directives that tells the assembler to interpret the |
| /// following instructions differently. Defaults to ".code16", ".code32", |
| /// ".code64". |
| const char *Code16Directive; |
| const char *Code32Directive; |
| const char *Code64Directive; |
| |
| /// Which dialect of an assembler variant to use. Defaults to 0 |
| unsigned AssemblerDialect = 0; |
| |
| /// This is true if the assembler allows @ characters in symbol names. |
| /// Defaults to false. |
| bool AllowAtInName = false; |
| |
| /// This is true if the assembler allows the "?" character at the start of |
| /// of a string to be lexed as an AsmToken::Identifier. |
| /// If the AsmLexer determines that the string can be lexed as a possible |
| /// comment, setting this option will have no effect, and the string will |
| /// still be lexed as a comment. |
| bool AllowQuestionAtStartOfIdentifier = false; |
| |
| /// This is true if the assembler allows the "$" character at the start of |
| /// of a string to be lexed as an AsmToken::Identifier. |
| /// If the AsmLexer determines that the string can be lexed as a possible |
| /// comment, setting this option will have no effect, and the string will |
| /// still be lexed as a comment. |
| bool AllowDollarAtStartOfIdentifier = false; |
| |
| /// This is true if the assembler allows the "@" character at the start of |
| /// a string to be lexed as an AsmToken::Identifier. |
| /// If the AsmLexer determines that the string can be lexed as a possible |
| /// comment, setting this option will have no effect, and the string will |
| /// still be lexed as a comment. |
| bool AllowAtAtStartOfIdentifier = false; |
| |
| /// This is true if the assembler allows the "#" character at the start of |
| /// a string to be lexed as an AsmToken::Identifier. |
| /// If the AsmLexer determines that the string can be lexed as a possible |
| /// comment, setting this option will have no effect, and the string will |
| /// still be lexed as a comment. |
| bool AllowHashAtStartOfIdentifier = false; |
| |
| /// If this is true, symbol names with invalid characters will be printed in |
| /// quotes. |
| bool SupportsQuotedNames = true; |
| |
| /// This is true if data region markers should be printed as |
| /// ".data_region/.end_data_region" directives. If false, use "$d/$a" labels |
| /// instead. |
| bool UseDataRegionDirectives = false; |
| |
| /// True if .align is to be used for alignment. Only power-of-two |
| /// alignment is supported. |
| bool UseDotAlignForAlignment = false; |
| |
| /// True if the target supports LEB128 directives. |
| bool HasLEB128Directives = true; |
| |
| //===--- Data Emission Directives -------------------------------------===// |
| |
| /// This should be set to the directive used to get some number of zero (and |
| /// non-zero if supported by the directive) bytes emitted to the current |
| /// section. Common cases are "\t.zero\t" and "\t.space\t". Defaults to |
| /// "\t.zero\t" |
| const char *ZeroDirective; |
| |
| /// This should be set to true if the zero directive supports a value to emit |
| /// other than zero. If this is set to false, the Data*bitsDirective's will be |
| /// used to emit these bytes. Defaults to true. |
| bool ZeroDirectiveSupportsNonZeroValue = true; |
| |
| /// This directive allows emission of an ascii string with the standard C |
| /// escape characters embedded into it. If a target doesn't support this, it |
| /// can be set to null. Defaults to "\t.ascii\t" |
| const char *AsciiDirective; |
| |
| /// If not null, this allows for special handling of zero terminated strings |
| /// on this target. This is commonly supported as ".asciz". If a target |
| /// doesn't support this, it can be set to null. Defaults to "\t.asciz\t" |
| const char *AscizDirective; |
| |
| /// This directive accepts a comma-separated list of bytes for emission as a |
| /// string of bytes. For targets that do not support this, it shall be set to |
| /// null. Defaults to null. |
| const char *ByteListDirective = nullptr; |
| |
| /// This directive allows emission of a zero-terminated ascii string without |
| /// the standard C escape characters embedded into it. If a target doesn't |
| /// support this, it can be set to null. Defaults to null. |
| const char *PlainStringDirective = nullptr; |
| |
| /// Form used for character literals in the assembly syntax. Useful for |
| /// producing strings as byte lists. If a target does not use or support |
| /// this, it shall be set to ACLS_Unknown. Defaults to ACLS_Unknown. |
| AsmCharLiteralSyntax CharacterLiteralSyntax = ACLS_Unknown; |
| |
| /// These directives are used to output some unit of integer data to the |
| /// current section. If a data directive is set to null, smaller data |
| /// directives will be used to emit the large sizes. Defaults to "\t.byte\t", |
| /// "\t.short\t", "\t.long\t", "\t.quad\t" |
| const char *Data8bitsDirective; |
| const char *Data16bitsDirective; |
| const char *Data32bitsDirective; |
| const char *Data64bitsDirective; |
| |
| /// True if data directives support signed values |
| bool SupportsSignedData = true; |
| |
| /// If non-null, a directive that is used to emit a word which should be |
| /// relocated as a 64-bit GP-relative offset, e.g. .gpdword on Mips. Defaults |
| /// to nullptr. |
| const char *GPRel64Directive = nullptr; |
| |
| /// If non-null, a directive that is used to emit a word which should be |
| /// relocated as a 32-bit GP-relative offset, e.g. .gpword on Mips or .gprel32 |
| /// on Alpha. Defaults to nullptr. |
| const char *GPRel32Directive = nullptr; |
| |
| /// If non-null, directives that are used to emit a word/dword which should |
| /// be relocated as a 32/64-bit DTP/TP-relative offset, e.g. .dtprelword/ |
| /// .dtpreldword/.tprelword/.tpreldword on Mips. |
| const char *DTPRel32Directive = nullptr; |
| const char *DTPRel64Directive = nullptr; |
| const char *TPRel32Directive = nullptr; |
| const char *TPRel64Directive = nullptr; |
| |
| /// This is true if this target uses "Sun Style" syntax for section switching |
| /// ("#alloc,#write" etc) instead of the normal ELF syntax (,"a,w") in |
| /// .section directives. Defaults to false. |
| bool SunStyleELFSectionSwitchSyntax = false; |
| |
| /// This is true if this target uses ELF '.section' directive before the |
| /// '.bss' one. It's used for PPC/Linux which doesn't support the '.bss' |
| /// directive only. Defaults to false. |
| bool UsesELFSectionDirectiveForBSS = false; |
| |
| bool NeedsDwarfSectionOffsetDirective = false; |
| |
| //===--- Alignment Information ----------------------------------------===// |
| |
| /// If this is true (the default) then the asmprinter emits ".align N" |
| /// directives, where N is the number of bytes to align to. Otherwise, it |
| /// emits ".align log2(N)", e.g. 3 to align to an 8 byte boundary. Defaults |
| /// to true. |
| bool AlignmentIsInBytes = true; |
| |
| /// If non-zero, this is used to fill the executable space created as the |
| /// result of a alignment directive. Defaults to 0 |
| unsigned TextAlignFillValue = 0; |
| |
| //===--- Global Variable Emission Directives --------------------------===// |
| |
| /// This is the directive used to declare a global entity. Defaults to |
| /// ".globl". |
| const char *GlobalDirective; |
| |
| /// True if the expression |
| /// .long f - g |
| /// uses a relocation but it can be suppressed by writing |
| /// a = f - g |
| /// .long a |
| bool SetDirectiveSuppressesReloc = false; |
| |
| /// False if the assembler requires that we use |
| /// \code |
| /// Lc = a - b |
| /// .long Lc |
| /// \endcode |
| // |
| /// instead of |
| // |
| /// \code |
| /// .long a - b |
| /// \endcode |
| /// |
| /// Defaults to true. |
| bool HasAggressiveSymbolFolding = true; |
| |
| /// True is .comm's and .lcomms optional alignment is to be specified in bytes |
| /// instead of log2(n). Defaults to true. |
| bool COMMDirectiveAlignmentIsInBytes = true; |
| |
| /// Describes if the .lcomm directive for the target supports an alignment |
| /// argument and how it is interpreted. Defaults to NoAlignment. |
| LCOMM::LCOMMType LCOMMDirectiveAlignmentType = LCOMM::NoAlignment; |
| |
| /// True if the target only has basename for .file directive. False if the |
| /// target also needs the directory along with the basename. Defaults to true. |
| bool HasBasenameOnlyForFileDirective = true; |
| |
| /// True if the target represents string constants as mostly raw characters in |
| /// paired double quotation with paired double quotation marks as the escape |
| /// mechanism to represent a double quotation mark within the string. Defaults |
| /// to false. |
| bool HasPairedDoubleQuoteStringConstants = false; |
| |
| // True if the target allows .align directives on functions. This is true for |
| // most targets, so defaults to true. |
| bool HasFunctionAlignment = true; |
| |
| /// True if the target has .type and .size directives, this is true for most |
| /// ELF targets. Defaults to true. |
| bool HasDotTypeDotSizeDirective = true; |
| |
| /// True if the target has a single parameter .file directive, this is true |
| /// for ELF targets. Defaults to true. |
| bool HasSingleParameterDotFile = true; |
| |
| /// True if the target has a four strings .file directive, strings seperated |
| /// by comma. Defaults to false. |
| bool HasFourStringsDotFile = false; |
| |
| /// True if the target has a .ident directive, this is true for ELF targets. |
| /// Defaults to false. |
| bool HasIdentDirective = false; |
| |
| /// True if this target supports the MachO .no_dead_strip directive. Defaults |
| /// to false. |
| bool HasNoDeadStrip = false; |
| |
| /// True if this target supports the MachO .alt_entry directive. Defaults to |
| /// false. |
| bool HasAltEntry = false; |
| |
| /// Used to declare a global as being a weak symbol. Defaults to ".weak". |
| const char *WeakDirective; |
| |
| /// This directive, if non-null, is used to declare a global as being a weak |
| /// undefined symbol. Defaults to nullptr. |
| const char *WeakRefDirective = nullptr; |
| |
| /// True if we have a directive to declare a global as being a weak defined |
| /// symbol. Defaults to false. |
| bool HasWeakDefDirective = false; |
| |
| /// True if we have a directive to declare a global as being a weak defined |
| /// symbol that can be hidden (unexported). Defaults to false. |
| bool HasWeakDefCanBeHiddenDirective = false; |
| |
| /// True if we should mark symbols as global instead of weak, for |
| /// weak*/linkonce*, if the symbol has a comdat. |
| /// Defaults to false. |
| bool AvoidWeakIfComdat = false; |
| |
| /// This attribute, if not MCSA_Invalid, is used to declare a symbol as having |
| /// hidden visibility. Defaults to MCSA_Hidden. |
| MCSymbolAttr HiddenVisibilityAttr = MCSA_Hidden; |
| |
| /// This attribute, if not MCSA_Invalid, is used to declare an undefined |
| /// symbol as having hidden visibility. Defaults to MCSA_Hidden. |
| MCSymbolAttr HiddenDeclarationVisibilityAttr = MCSA_Hidden; |
| |
| /// This attribute, if not MCSA_Invalid, is used to declare a symbol as having |
| /// protected visibility. Defaults to MCSA_Protected |
| MCSymbolAttr ProtectedVisibilityAttr = MCSA_Protected; |
| |
| //===--- Dwarf Emission Directives -----------------------------------===// |
| |
| /// True if target supports emission of debugging information. Defaults to |
| /// false. |
| bool SupportsDebugInformation = false; |
| |
| /// Exception handling format for the target. Defaults to None. |
| ExceptionHandling ExceptionsType = ExceptionHandling::None; |
| |
| /// True if target uses CFI unwind information for debugging purpose when |
| /// `ExceptionsType == ExceptionHandling::None`. |
| bool UsesCFIForDebug = false; |
| |
| /// Windows exception handling data (.pdata) encoding. Defaults to Invalid. |
| WinEH::EncodingType WinEHEncodingType = WinEH::EncodingType::Invalid; |
| |
| /// True if Dwarf2 output generally uses relocations for references to other |
| /// .debug_* sections. |
| bool DwarfUsesRelocationsAcrossSections = true; |
| |
| /// True if DWARF FDE symbol reference relocations should be replaced by an |
| /// absolute difference. |
| bool DwarfFDESymbolsUseAbsDiff = false; |
| |
| /// True if the target supports generating the DWARF line table through using |
| /// the .loc/.file directives. Defaults to true. |
| bool UsesDwarfFileAndLocDirectives = true; |
| |
| /// True if the target needs the DWARF section length in the header (if any) |
| /// of the DWARF section in the assembly file. Defaults to true. |
| bool DwarfSectionSizeRequired = true; |
| |
| /// True if dwarf register numbers are printed instead of symbolic register |
| /// names in .cfi_* directives. Defaults to false. |
| bool DwarfRegNumForCFI = false; |
| |
| /// True if target uses parens to indicate the symbol variant instead of @. |
| /// For example, foo(plt) instead of foo@plt. Defaults to false. |
| bool UseParensForSymbolVariant = false; |
| |
| /// True if the target supports flags in ".loc" directive, false if only |
| /// location is allowed. |
| bool SupportsExtendedDwarfLocDirective = true; |
| |
| //===--- Prologue State ----------------------------------------------===// |
| |
| std::vector<MCCFIInstruction> InitialFrameState; |
| |
| //===--- Integrated Assembler Information ----------------------------===// |
| |
| // Generated object files can use all ELF features supported by GNU ld of |
| // this binutils version and later. INT_MAX means all features can be used, |
| // regardless of GNU ld support. The default value is referenced by |
| // clang/Driver/Options.td. |
| std::pair<int, int> BinutilsVersion = {2, 26}; |
| |
| /// Should we use the integrated assembler? |
| /// The integrated assembler should be enabled by default (by the |
| /// constructors) when failing to parse a valid piece of assembly (inline |
| /// or otherwise) is considered a bug. It may then be overridden after |
| /// construction (see LLVMTargetMachine::initAsmInfo()). |
| bool UseIntegratedAssembler; |
| |
| /// Use AsmParser to parse inlineAsm when UseIntegratedAssembler is not set. |
| bool ParseInlineAsmUsingAsmParser; |
| |
| /// Preserve Comments in assembly |
| bool PreserveAsmComments; |
| |
| /// Compress DWARF debug sections. Defaults to no compression. |
| DebugCompressionType CompressDebugSections = DebugCompressionType::None; |
| |
| /// True if the integrated assembler should interpret 'a >> b' constant |
| /// expressions as logical rather than arithmetic. |
| bool UseLogicalShr = true; |
| |
| // If true, emit GOTPCRELX/REX_GOTPCRELX instead of GOTPCREL, on |
| // X86_64 ELF. |
| bool RelaxELFRelocations = true; |
| |
| // If true, then the lexer and expression parser will support %neg(), |
| // %hi(), and similar unary operators. |
| bool HasMipsExpressions = false; |
| |
| // If true, use Motorola-style integers in Assembly (ex. $0ac). |
| bool UseMotorolaIntegers = false; |
| |
| // If true, emit function descriptor symbol on AIX. |
| bool NeedsFunctionDescriptors = false; |
| |
| public: |
| explicit MCAsmInfo(); |
| virtual ~MCAsmInfo(); |
| |
| /// Get the code pointer size in bytes. |
| unsigned getCodePointerSize() const { return CodePointerSize; } |
| |
| /// Get the callee-saved register stack slot |
| /// size in bytes. |
| unsigned getCalleeSaveStackSlotSize() const { |
| return CalleeSaveStackSlotSize; |
| } |
| |
| /// True if the target is little endian. |
| bool isLittleEndian() const { return IsLittleEndian; } |
| |
| /// True if target stack grow up. |
| bool isStackGrowthDirectionUp() const { return StackGrowsUp; } |
| |
| bool hasSubsectionsViaSymbols() const { return HasSubsectionsViaSymbols; } |
| |
| // Data directive accessors. |
| |
| const char *getData8bitsDirective() const { return Data8bitsDirective; } |
| const char *getData16bitsDirective() const { return Data16bitsDirective; } |
| const char *getData32bitsDirective() const { return Data32bitsDirective; } |
| const char *getData64bitsDirective() const { return Data64bitsDirective; } |
| bool supportsSignedData() const { return SupportsSignedData; } |
| const char *getGPRel64Directive() const { return GPRel64Directive; } |
| const char *getGPRel32Directive() const { return GPRel32Directive; } |
| const char *getDTPRel64Directive() const { return DTPRel64Directive; } |
| const char *getDTPRel32Directive() const { return DTPRel32Directive; } |
| const char *getTPRel64Directive() const { return TPRel64Directive; } |
| const char *getTPRel32Directive() const { return TPRel32Directive; } |
| |
| /// Targets can implement this method to specify a section to switch to if the |
| /// translation unit doesn't have any trampolines that require an executable |
| /// stack. |
| virtual MCSection *getNonexecutableStackSection(MCContext &Ctx) const { |
| return nullptr; |
| } |
| |
| /// True if the section is atomized using the symbols in it. |
| /// This is false if the section is not atomized at all (most ELF sections) or |
| /// if it is atomized based on its contents (MachO' __TEXT,__cstring for |
| /// example). |
| virtual bool isSectionAtomizableBySymbols(const MCSection &Section) const; |
| |
| virtual const MCExpr *getExprForPersonalitySymbol(const MCSymbol *Sym, |
| unsigned Encoding, |
| MCStreamer &Streamer) const; |
| |
| virtual const MCExpr *getExprForFDESymbol(const MCSymbol *Sym, |
| unsigned Encoding, |
| MCStreamer &Streamer) const; |
| |
| /// Return true if C is an acceptable character inside a symbol name. |
| virtual bool isAcceptableChar(char C) const; |
| |
| /// Return true if the identifier \p Name does not need quotes to be |
| /// syntactically correct. |
| virtual bool isValidUnquotedName(StringRef Name) const; |
| |
| /// Return true if the .section directive should be omitted when |
| /// emitting \p SectionName. For example: |
| /// |
| /// shouldOmitSectionDirective(".text") |
| /// |
| /// returns false => .section .text,#alloc,#execinstr |
| /// returns true => .text |
| virtual bool shouldOmitSectionDirective(StringRef SectionName) const; |
| |
| bool usesSunStyleELFSectionSwitchSyntax() const { |
| return SunStyleELFSectionSwitchSyntax; |
| } |
| |
| bool usesELFSectionDirectiveForBSS() const { |
| return UsesELFSectionDirectiveForBSS; |
| } |
| |
| bool needsDwarfSectionOffsetDirective() const { |
| return NeedsDwarfSectionOffsetDirective; |
| } |
| |
| // Accessors. |
| |
| bool hasMachoZeroFillDirective() const { return HasMachoZeroFillDirective; } |
| bool hasMachoTBSSDirective() const { return HasMachoTBSSDirective; } |
| bool hasCOFFAssociativeComdats() const { return HasCOFFAssociativeComdats; } |
| bool hasCOFFComdatConstants() const { return HasCOFFComdatConstants; } |
| bool hasVisibilityOnlyWithLinkage() const { |
| return HasVisibilityOnlyWithLinkage; |
| } |
| |
| /// Returns the maximum possible encoded instruction size in bytes. If \p STI |
| /// is null, this should be the maximum size for any subtarget. |
| virtual unsigned getMaxInstLength(const MCSubtargetInfo *STI = nullptr) const { |
| return MaxInstLength; |
| } |
| |
| unsigned getMinInstAlignment() const { return MinInstAlignment; } |
| bool getDollarIsPC() const { return DollarIsPC; } |
| bool getDotIsPC() const { return DotIsPC; } |
| bool getStarIsPC() const { return StarIsPC; } |
| const char *getSeparatorString() const { return SeparatorString; } |
| |
| /// This indicates the column (zero-based) at which asm comments should be |
| /// printed. |
| unsigned getCommentColumn() const { return 40; } |
| |
| StringRef getCommentString() const { return CommentString; } |
| bool getRestrictCommentStringToStartOfStatement() const { |
| return RestrictCommentStringToStartOfStatement; |
| } |
| bool shouldAllowAdditionalComments() const { return AllowAdditionalComments; } |
| bool getEmitGNUAsmStartIndentationMarker() const { |
| return EmitGNUAsmStartIndentationMarker; |
| } |
| const char *getLabelSuffix() const { return LabelSuffix; } |
| bool shouldEmitLabelsInUpperCase() const { return EmitLabelsInUpperCase; } |
| |
| bool useAssignmentForEHBegin() const { return UseAssignmentForEHBegin; } |
| bool needsLocalForSize() const { return NeedsLocalForSize; } |
| StringRef getPrivateGlobalPrefix() const { return PrivateGlobalPrefix; } |
| StringRef getPrivateLabelPrefix() const { return PrivateLabelPrefix; } |
| |
| bool hasLinkerPrivateGlobalPrefix() const { |
| return !LinkerPrivateGlobalPrefix.empty(); |
| } |
| |
| StringRef getLinkerPrivateGlobalPrefix() const { |
| if (hasLinkerPrivateGlobalPrefix()) |
| return LinkerPrivateGlobalPrefix; |
| return getPrivateGlobalPrefix(); |
| } |
| |
| const char *getInlineAsmStart() const { return InlineAsmStart; } |
| const char *getInlineAsmEnd() const { return InlineAsmEnd; } |
| const char *getCode16Directive() const { return Code16Directive; } |
| const char *getCode32Directive() const { return Code32Directive; } |
| const char *getCode64Directive() const { return Code64Directive; } |
| unsigned getAssemblerDialect() const { return AssemblerDialect; } |
| bool doesAllowAtInName() const { return AllowAtInName; } |
| void setAllowAtInName(bool V) { AllowAtInName = V; } |
| bool doesAllowQuestionAtStartOfIdentifier() const { |
| return AllowQuestionAtStartOfIdentifier; |
| } |
| bool doesAllowAtAtStartOfIdentifier() const { |
| return AllowAtAtStartOfIdentifier; |
| } |
| bool doesAllowDollarAtStartOfIdentifier() const { |
| return AllowDollarAtStartOfIdentifier; |
| } |
| bool doesAllowHashAtStartOfIdentifier() const { |
| return AllowHashAtStartOfIdentifier; |
| } |
| bool supportsNameQuoting() const { return SupportsQuotedNames; } |
| |
| bool doesSupportDataRegionDirectives() const { |
| return UseDataRegionDirectives; |
| } |
| |
| bool useDotAlignForAlignment() const { |
| return UseDotAlignForAlignment; |
| } |
| |
| bool hasLEB128Directives() const { return HasLEB128Directives; } |
| |
| const char *getZeroDirective() const { return ZeroDirective; } |
| bool doesZeroDirectiveSupportNonZeroValue() const { |
| return ZeroDirectiveSupportsNonZeroValue; |
| } |
| const char *getAsciiDirective() const { return AsciiDirective; } |
| const char *getAscizDirective() const { return AscizDirective; } |
| const char *getByteListDirective() const { return ByteListDirective; } |
| const char *getPlainStringDirective() const { return PlainStringDirective; } |
| AsmCharLiteralSyntax characterLiteralSyntax() const { |
| return CharacterLiteralSyntax; |
| } |
| bool getAlignmentIsInBytes() const { return AlignmentIsInBytes; } |
| unsigned getTextAlignFillValue() const { return TextAlignFillValue; } |
| const char *getGlobalDirective() const { return GlobalDirective; } |
| |
| bool doesSetDirectiveSuppressReloc() const { |
| return SetDirectiveSuppressesReloc; |
| } |
| |
| bool hasAggressiveSymbolFolding() const { return HasAggressiveSymbolFolding; } |
| |
| bool getCOMMDirectiveAlignmentIsInBytes() const { |
| return COMMDirectiveAlignmentIsInBytes; |
| } |
| |
| LCOMM::LCOMMType getLCOMMDirectiveAlignmentType() const { |
| return LCOMMDirectiveAlignmentType; |
| } |
| |
| bool hasBasenameOnlyForFileDirective() const { |
| return HasBasenameOnlyForFileDirective; |
| } |
| bool hasPairedDoubleQuoteStringConstants() const { |
| return HasPairedDoubleQuoteStringConstants; |
| } |
| bool hasFunctionAlignment() const { return HasFunctionAlignment; } |
| bool hasDotTypeDotSizeDirective() const { return HasDotTypeDotSizeDirective; } |
| bool hasSingleParameterDotFile() const { return HasSingleParameterDotFile; } |
| bool hasFourStringsDotFile() const { return HasFourStringsDotFile; } |
| bool hasIdentDirective() const { return HasIdentDirective; } |
| bool hasNoDeadStrip() const { return HasNoDeadStrip; } |
| bool hasAltEntry() const { return HasAltEntry; } |
| const char *getWeakDirective() const { return WeakDirective; } |
| const char *getWeakRefDirective() const { return WeakRefDirective; } |
| bool hasWeakDefDirective() const { return HasWeakDefDirective; } |
| |
| bool hasWeakDefCanBeHiddenDirective() const { |
| return HasWeakDefCanBeHiddenDirective; |
| } |
| |
| bool avoidWeakIfComdat() const { return AvoidWeakIfComdat; } |
| |
| MCSymbolAttr getHiddenVisibilityAttr() const { return HiddenVisibilityAttr; } |
| |
| MCSymbolAttr getHiddenDeclarationVisibilityAttr() const { |
| return HiddenDeclarationVisibilityAttr; |
| } |
| |
| MCSymbolAttr getProtectedVisibilityAttr() const { |
| return ProtectedVisibilityAttr; |
| } |
| |
| bool doesSupportDebugInformation() const { return SupportsDebugInformation; } |
| |
| ExceptionHandling getExceptionHandlingType() const { return ExceptionsType; } |
| WinEH::EncodingType getWinEHEncodingType() const { return WinEHEncodingType; } |
| |
| void setExceptionsType(ExceptionHandling EH) { |
| ExceptionsType = EH; |
| } |
| |
| bool doesUseCFIForDebug() const { return UsesCFIForDebug; } |
| |
| /// Returns true if the exception handling method for the platform uses call |
| /// frame information to unwind. |
| bool usesCFIForEH() const { |
| return (ExceptionsType == ExceptionHandling::DwarfCFI || |
| ExceptionsType == ExceptionHandling::ARM || usesWindowsCFI()); |
| } |
| |
| bool usesWindowsCFI() const { |
| return ExceptionsType == ExceptionHandling::WinEH && |
| (WinEHEncodingType != WinEH::EncodingType::Invalid && |
| WinEHEncodingType != WinEH::EncodingType::X86); |
| } |
| |
| bool doesDwarfUseRelocationsAcrossSections() const { |
| return DwarfUsesRelocationsAcrossSections; |
| } |
| |
| bool doDwarfFDESymbolsUseAbsDiff() const { return DwarfFDESymbolsUseAbsDiff; } |
| bool useDwarfRegNumForCFI() const { return DwarfRegNumForCFI; } |
| bool useParensForSymbolVariant() const { return UseParensForSymbolVariant; } |
| bool supportsExtendedDwarfLocDirective() const { |
| return SupportsExtendedDwarfLocDirective; |
| } |
| |
| bool usesDwarfFileAndLocDirectives() const { |
| return UsesDwarfFileAndLocDirectives; |
| } |
| |
| bool needsDwarfSectionSizeInHeader() const { |
| return DwarfSectionSizeRequired; |
| } |
| |
| void addInitialFrameState(const MCCFIInstruction &Inst); |
| |
| const std::vector<MCCFIInstruction> &getInitialFrameState() const { |
| return InitialFrameState; |
| } |
| |
| void setBinutilsVersion(std::pair<int, int> Value) { |
| BinutilsVersion = Value; |
| } |
| |
| /// Return true if assembly (inline or otherwise) should be parsed. |
| bool useIntegratedAssembler() const { return UseIntegratedAssembler; } |
| |
| /// Return true if target want to use AsmParser to parse inlineasm. |
| bool parseInlineAsmUsingAsmParser() const { |
| return ParseInlineAsmUsingAsmParser; |
| } |
| |
| bool binutilsIsAtLeast(int Major, int Minor) const { |
| return BinutilsVersion >= std::make_pair(Major, Minor); |
| } |
| |
| /// Set whether assembly (inline or otherwise) should be parsed. |
| virtual void setUseIntegratedAssembler(bool Value) { |
| UseIntegratedAssembler = Value; |
| } |
| |
| /// Set whether target want to use AsmParser to parse inlineasm. |
| virtual void setParseInlineAsmUsingAsmParser(bool Value) { |
| ParseInlineAsmUsingAsmParser = Value; |
| } |
| |
| /// Return true if assembly (inline or otherwise) should be parsed. |
| bool preserveAsmComments() const { return PreserveAsmComments; } |
| |
| /// Set whether assembly (inline or otherwise) should be parsed. |
| virtual void setPreserveAsmComments(bool Value) { |
| PreserveAsmComments = Value; |
| } |
| |
| DebugCompressionType compressDebugSections() const { |
| return CompressDebugSections; |
| } |
| |
| void setCompressDebugSections(DebugCompressionType CompressDebugSections) { |
| this->CompressDebugSections = CompressDebugSections; |
| } |
| |
| bool shouldUseLogicalShr() const { return UseLogicalShr; } |
| |
| bool canRelaxRelocations() const { return RelaxELFRelocations; } |
| void setRelaxELFRelocations(bool V) { RelaxELFRelocations = V; } |
| bool hasMipsExpressions() const { return HasMipsExpressions; } |
| bool needsFunctionDescriptors() const { return NeedsFunctionDescriptors; } |
| bool shouldUseMotorolaIntegers() const { return UseMotorolaIntegers; } |
| }; |
| |
| } // end namespace llvm |
| |
| #endif // LLVM_MC_MCASMINFO_H |