X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FMC%2FMCAsmInfo.h;h=873316139457ced3b96f46dbf354440751af8f53;hb=debd7e4e8bc5cfe61bfb71835ce2b1a3fbccc2be;hp=8a3ab738100d2503b6ea1ee4826ee652d4023d00;hpb=cba386ccac87c2446579ef235d2b4dc7951c0941;p=oota-llvm.git diff --git a/include/llvm/MC/MCAsmInfo.h b/include/llvm/MC/MCAsmInfo.h index 8a3ab738100..87331613945 100644 --- a/include/llvm/MC/MCAsmInfo.h +++ b/include/llvm/MC/MCAsmInfo.h @@ -20,12 +20,17 @@ #include namespace llvm { + class MCExpr; class MCSection; + class MCStreamer; + class MCSymbol; class MCContext; - + /// MCAsmInfo - This class is intended to be used as a base class for asm /// properties and features specific to the target. - namespace ExceptionHandling { enum ExceptionsType { None, Dwarf, SjLj }; } + namespace ExceptionHandling { + enum ExceptionsType { None, DwarfTable, DwarfCFI, SjLj, ARM }; + } class MCAsmInfo { protected: @@ -36,49 +41,49 @@ namespace llvm { /// HasSubsectionsViaSymbols - True if this target has the MachO /// .subsections_via_symbols directive. bool HasSubsectionsViaSymbols; // Default is false. - + /// HasMachoZeroFillDirective - True if this is a MachO target that supports /// the macho-specific .zerofill directive for emitting BSS Symbols. bool HasMachoZeroFillDirective; // Default is false. - + + /// HasMachoTBSSDirective - True if this is a MachO target that supports + /// the macho-specific .tbss directive for emitting thread local BSS Symbols + bool HasMachoTBSSDirective; // Default is false. + /// HasStaticCtorDtorReferenceInStaticMode - True if the compiler should /// emit a ".reference .constructors_used" or ".reference .destructors_used" /// directive after the a static ctor/dtor list. This directive is only /// emitted in Static relocation model. bool HasStaticCtorDtorReferenceInStaticMode; // Default is false. - - /// NeedsSet - True if target asm treats expressions in data directives - /// as linktime-relocatable. For assembly-time computation, we need to - /// use a .set. Thus: - /// .set w, x-y - /// .long w - /// is computed at assembly time, while - /// .long x-y - /// is relocated if the relative locations of x and y change at linktime. - /// We want both these things in different places. - bool NeedsSet; // Defaults to false. - + + /// LinkerRequiresNonEmptyDwarfLines - True if the linker has a bug and + /// requires that the debug_line section be of a minimum size. In practice + /// such a linker requires a non empty line sequence if a file is present. + bool LinkerRequiresNonEmptyDwarfLines; // Default to false. + /// MaxInstLength - This is the maximum possible length of an instruction, /// which is needed to compute the size of an inline asm. unsigned MaxInstLength; // Defaults to 4. - + /// PCSymbol - The symbol used to represent the current PC. Used in PC /// relative expressions. const char *PCSymbol; // Defaults to "$". - /// SeparatorChar - This character, if specified, is used to separate - /// instructions from each other when on the same line. This is used to - /// measure inline asm instructions. - char SeparatorChar; // Defaults to ';' + /// SeparatorString - This string, if specified, is used to separate + /// instructions from each other when on the same line. + const char *SeparatorString; // Defaults to ';' /// CommentColumn - This indicates the comment num (zero-based) at /// which asm comments should be printed. - unsigned CommentColumn; // Defaults to 60 + unsigned CommentColumn; // Defaults to 40 /// CommentString - This indicates the comment character used by the /// assembler. const char *CommentString; // Defaults to "#" + /// LabelSuffix - This is appended to emitted labels. + const char *LabelSuffix; // Defaults to ":" + /// GlobalPrefix - If this is set to a non-empty string, it is prepended /// onto all global symbols. This is often used for "_" or ".". const char *GlobalPrefix; // Defaults to "" @@ -87,12 +92,12 @@ namespace llvm { /// pool entries that are completely private to the .s file and should not /// have names in the .o file. This is often "." or "L". const char *PrivateGlobalPrefix; // Defaults to "." - + /// LinkerPrivateGlobalPrefix - 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. const char *LinkerPrivateGlobalPrefix; // Defaults to "" - + /// InlineAsmStart/End - If these are nonempty, they contain a directive to /// emit before and after an inline assembly statement. const char *InlineAsmStart; // Defaults to "#APP\n" @@ -108,7 +113,11 @@ namespace llvm { /// AllowNameToStartWithDigit - This is true if the assembler allows symbol /// names to start with a digit (e.g., "0x0021"). This defaults to false. bool AllowNameToStartWithDigit; - + + /// AllowPeriodsInName - This is true if the assembler allows periods in + /// symbol names. This defaults to true. + bool AllowPeriodsInName; + //===--- Data Emission Directives -------------------------------------===// /// ZeroDirective - this should be set to the directive used to get some @@ -120,7 +129,7 @@ namespace llvm { /// AsciiDirective - This directive allows emission of an ascii string with /// the standard C escape characters embedded into it. const char *AsciiDirective; // Defaults to "\t.ascii\t" - + /// AscizDirective - 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. @@ -134,6 +143,11 @@ namespace llvm { const char *Data32bitsDirective; // Defaults to "\t.long\t" const char *Data64bitsDirective; // Defaults to "\t.quad\t" + /// GPRel32Directive - 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. + const char *GPRel32Directive; // Defaults to NULL. + /// getDataASDirective - Return the directive that should be used to emit /// data of the specified size to the specified numeric address space. virtual const char *getDataASDirective(unsigned Size, unsigned AS) const { @@ -147,10 +161,15 @@ namespace llvm { bool SunStyleELFSectionSwitchSyntax; // Defaults to false. /// UsesELFSectionDirectiveForBSS - This is true if this target uses ELF - /// '.section' directive before the '.bss' one. It's used for PPC/Linux + /// '.section' directive before the '.bss' one. It's used for PPC/Linux /// which doesn't support the '.bss' directive only. bool UsesELFSectionDirectiveForBSS; // Defaults to false. - + + /// HasMicrosoftFastStdCallMangling - True if this target uses microsoft + /// style mangling for functions with X86_StdCall/X86_FastCall calling + /// convention. + bool HasMicrosoftFastStdCallMangling; // Defaults to false. + //===--- Alignment Information ----------------------------------------===// /// AlignDirective - The directive used to emit round up to an alignment @@ -168,32 +187,35 @@ namespace llvm { /// space created as the result of a alignment directive. unsigned TextAlignFillValue; // Defaults to 0 - //===--- Section Switching Directives ---------------------------------===// - - /// PICJumpTableDirective - if non-null, the directive to emit before jump - /// table entries. FIXME: REMOVE THIS. - const char *PICJumpTableDirective; // Defaults to NULL. - - //===--- Global Variable Emission Directives --------------------------===// - + /// GlobalDirective - This is the directive used to declare a global entity. /// const char *GlobalDirective; // Defaults to NULL. - /// ExternDirective - This is the directive used to declare external + /// ExternDirective - This is the directive used to declare external /// globals. /// const char *ExternDirective; // Defaults to NULL. - - /// SetDirective - This is the name of a directive that can be used to tell - /// the assembler to set the value of a variable to some expression. - const char *SetDirective; // Defaults to null. - + + /// HasSetDirective - True if the assembler supports the .set directive. + bool HasSetDirective; // Defaults to true. + + /// HasAggressiveSymbolFolding - False if the assembler requires that we use + /// Lc = a - b + /// .long Lc + /// instead of + /// .long a - b + bool HasAggressiveSymbolFolding; // Defaults to true. + /// HasLCOMMDirective - This is true if the target supports the .lcomm /// directive. - bool HasLCOMMDirective; // Defaults to false. - + bool HasLCOMMDirective; // Defaults to false. + + /// COMMDirectiveAlignmentIsInBytes - True is COMMDirective's optional + /// alignment is to be specified in bytes instead of log2(n). + bool COMMDirectiveAlignmentIsInBytes; // Defaults to true; + /// HasDotTypeDotSizeDirective - True if the target has .type and .size /// directives, this is true for most ELF targets. bool HasDotTypeDotSizeDirective; // Defaults to true. @@ -206,10 +228,14 @@ namespace llvm { /// directive. bool HasNoDeadStrip; // Defaults to false. + /// HasSymbolResolver - True if this target supports the MachO + /// .symbol_resolver directive. + bool HasSymbolResolver; // Defaults to false. + /// WeakRefDirective - This directive, if non-null, is used to declare a /// global as being a weak undefined symbol. const char *WeakRefDirective; // Defaults to NULL. - + /// WeakDefDirective - This directive, if non-null, is used to declare a /// global as being a weak defined symbol. const char *WeakDefDirective; // Defaults to NULL. @@ -217,32 +243,25 @@ namespace llvm { /// LinkOnceDirective - This directive, if non-null is used to declare a /// global as being a weak defined symbol. This is used on cygwin/mingw. const char *LinkOnceDirective; // Defaults to NULL. - + /// HiddenVisibilityAttr - This attribute, if not MCSA_Invalid, is used to /// declare a symbol as having hidden visibility. MCSymbolAttr HiddenVisibilityAttr; // Defaults to MCSA_Hidden. + /// HiddenDeclarationVisibilityAttr - This attribute, if not MCSA_Invalid, + /// is used to declare an undefined symbol as having hidden visibility. + MCSymbolAttr HiddenDeclarationVisibilityAttr; // Defaults to MCSA_Hidden. + + /// ProtectedVisibilityAttr - This attribute, if not MCSA_Invalid, is used /// to declare a symbol as having protected visibility. MCSymbolAttr ProtectedVisibilityAttr; // Defaults to MCSA_Protected //===--- Dwarf Emission Directives -----------------------------------===// - /// AbsoluteDebugSectionOffsets - True if we should emit abolute section - /// offsets for debug information. - bool AbsoluteDebugSectionOffsets; // Defaults to false. - - /// AbsoluteEHSectionOffsets - True if we should emit abolute section - /// offsets for EH information. Defaults to false. - bool AbsoluteEHSectionOffsets; - /// HasLEB128 - True if target asm supports leb128 directives. bool HasLEB128; // Defaults to false. - /// hasDotLocAndDotFile - True if target asm supports .loc and .file - /// directives for emitting debugging information. - bool HasDotLocAndDotFile; // Defaults to false. - /// SupportsDebugInformation - True if target supports emission of debugging /// information. bool SupportsDebugInformation; // Defaults to false. @@ -257,21 +276,17 @@ namespace llvm { /// encode inline subroutine information. bool DwarfUsesInlineInfoSection; // Defaults to false. - /// Is_EHSymbolPrivate - If set, the "_foo.eh" is made private so that it - /// doesn't show up in the symbol table of the object file. - bool Is_EHSymbolPrivate; // Defaults to true. + /// DwarfSectionOffsetDirective - Special section offset directive. + const char* DwarfSectionOffsetDirective; // Defaults to NULL - /// GlobalEHDirective - This is the directive used to make exception frame - /// tables globally visible. - const char *GlobalEHDirective; // Defaults to NULL. + /// DwarfUsesAbsoluteLabelForStmtList - True if DW_AT_stmt_list needs + /// absolute label instead of offset. + bool DwarfUsesAbsoluteLabelForStmtList; // Defaults to true; - /// SupportsWeakEmptyEHFrame - True if target assembler and linker will - /// handle a weak_definition of constant 0 for an omitted EH frame. - bool SupportsWeakOmittedEHFrame; // Defaults to true. + // DwarfUsesLabelOffsetDifference - True if Dwarf2 output can + // use EmitLabelOffsetDifference. + bool DwarfUsesLabelOffsetForRanges; - /// DwarfSectionOffsetDirective - Special section offset directive. - const char* DwarfSectionOffsetDirective; // Defaults to NULL - //===--- CBE Asm Translation Table -----------------------------------===// const char *const *AsmTransCBE; // Defaults to empty @@ -285,7 +300,7 @@ namespace llvm { static unsigned getULEB128Size(unsigned Value); bool hasSubsectionsViaSymbols() const { return HasSubsectionsViaSymbols; } - + // Data directive accessors. // const char *getData8bitsDirective(unsigned AS = 0) const { @@ -300,30 +315,46 @@ namespace llvm { const char *getData64bitsDirective(unsigned AS = 0) const { return AS == 0 ? Data64bitsDirective : getDataASDirective(64, AS); } + const char *getGPRel32Directive() const { return GPRel32Directive; } /// getNonexecutableStackSection - 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 { + virtual const MCSection *getNonexecutableStackSection(MCContext &Ctx) const{ return 0; } - + + virtual const MCExpr * + getExprForPersonalitySymbol(const MCSymbol *Sym, + unsigned Encoding, + MCStreamer &Streamer) const; + + const MCExpr * + getExprForFDESymbol(const MCSymbol *Sym, + unsigned Encoding, + MCStreamer &Streamer) const; + bool usesSunStyleELFSectionSwitchSyntax() const { return SunStyleELFSectionSwitchSyntax; } - + bool usesELFSectionDirectiveForBSS() const { return UsesELFSectionDirectiveForBSS; } + bool hasMicrosoftFastStdCallMangling() const { + return HasMicrosoftFastStdCallMangling; + } + // Accessors. // bool hasMachoZeroFillDirective() const { return HasMachoZeroFillDirective; } + bool hasMachoTBSSDirective() const { return HasMachoTBSSDirective; } bool hasStaticCtorDtorReferenceInStaticMode() const { return HasStaticCtorDtorReferenceInStaticMode; } - bool needsSet() const { - return NeedsSet; + bool getLinkerRequiresNonEmptyDwarfLines() const { + return LinkerRequiresNonEmptyDwarfLines; } unsigned getMaxInstLength() const { return MaxInstLength; @@ -331,8 +362,8 @@ namespace llvm { const char *getPCSymbol() const { return PCSymbol; } - char getSeparatorChar() const { - return SeparatorChar; + const char *getSeparatorString() const { + return SeparatorString; } unsigned getCommentColumn() const { return CommentColumn; @@ -340,6 +371,9 @@ namespace llvm { const char *getCommentString() const { return CommentString; } + const char *getLabelSuffix() const { + return LabelSuffix; + } const char *getGlobalPrefix() const { return GlobalPrefix; } @@ -364,6 +398,9 @@ namespace llvm { bool doesAllowNameToStartWithDigit() const { return AllowNameToStartWithDigit; } + bool doesAllowPeriodsInName() const { + return AllowPeriodsInName; + } const char *getZeroDirective() const { return ZeroDirective; } @@ -373,9 +410,6 @@ namespace llvm { const char *getAscizDirective() const { return AscizDirective; } - const char *getPICJumpTableDirective() const { - return PICJumpTableDirective; - } const char *getAlignDirective() const { return AlignDirective; } @@ -391,33 +425,32 @@ namespace llvm { const char *getExternDirective() const { return ExternDirective; } - const char *getSetDirective() const { - return SetDirective; + bool hasSetDirective() const { return HasSetDirective; } + bool hasAggressiveSymbolFolding() const { + return HasAggressiveSymbolFolding; } bool hasLCOMMDirective() const { return HasLCOMMDirective; } bool hasDotTypeDotSizeDirective() const {return HasDotTypeDotSizeDirective;} + bool getCOMMDirectiveAlignmentIsInBytes() const { + return COMMDirectiveAlignmentIsInBytes; + } bool hasSingleParameterDotFile() const { return HasSingleParameterDotFile; } bool hasNoDeadStrip() const { return HasNoDeadStrip; } + bool hasSymbolResolver() const { return HasSymbolResolver; } const char *getWeakRefDirective() const { return WeakRefDirective; } const char *getWeakDefDirective() const { return WeakDefDirective; } const char *getLinkOnceDirective() const { return LinkOnceDirective; } - + MCSymbolAttr getHiddenVisibilityAttr() const { return HiddenVisibilityAttr;} + MCSymbolAttr getHiddenDeclarationVisibilityAttr() const { + return HiddenDeclarationVisibilityAttr; + } MCSymbolAttr getProtectedVisibilityAttr() const { return ProtectedVisibilityAttr; } - bool isAbsoluteDebugSectionOffsets() const { - return AbsoluteDebugSectionOffsets; - } - bool isAbsoluteEHSectionOffsets() const { - return AbsoluteEHSectionOffsets; - } bool hasLEB128() const { return HasLEB128; } - bool hasDotLocAndDotFile() const { - return HasDotLocAndDotFile; - } bool doesSupportDebugInformation() const { return SupportsDebugInformation; } @@ -427,24 +460,28 @@ namespace llvm { ExceptionHandling::ExceptionsType getExceptionHandlingType() const { return ExceptionsType; } + bool isExceptionHandlingDwarf() const { + return + (ExceptionsType == ExceptionHandling::DwarfTable || + ExceptionsType == ExceptionHandling::DwarfCFI || + ExceptionsType == ExceptionHandling::ARM); + } + bool doesDwarfRequireFrameSection() const { return DwarfRequiresFrameSection; } bool doesDwarfUsesInlineInfoSection() const { return DwarfUsesInlineInfoSection; } - bool is_EHSymbolPrivate() const { - return Is_EHSymbolPrivate; - } - const char *getGlobalEHDirective() const { - return GlobalEHDirective; - } - bool getSupportsWeakOmittedEHFrame() const { - return SupportsWeakOmittedEHFrame; - } const char *getDwarfSectionOffsetDirective() const { return DwarfSectionOffsetDirective; } + bool doesDwarfUsesAbsoluteLabelForStmtList() const { + return DwarfUsesAbsoluteLabelForStmtList; + } + bool doesDwarfUsesLabelOffsetForRanges() const { + return DwarfUsesLabelOffsetForRanges; + } const char *const *getAsmCBE() const { return AsmTransCBE; }