X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FMC%2FMCAsmInfo.h;h=97aad71fd95514d1d20c0513d966f567c9f6ccfe;hb=43e1d7aded7bf8486f5b810b6dc85652f99f6ba0;hp=0be27530f27149af10f1f6129599644ea23b4935;hpb=f03ffd13f8f31fb8ead74b94eb2ef71b80ac7739;p=oota-llvm.git diff --git a/include/llvm/MC/MCAsmInfo.h b/include/llvm/MC/MCAsmInfo.h index 0be27530f27..97aad71fd95 100644 --- a/include/llvm/MC/MCAsmInfo.h +++ b/include/llvm/MC/MCAsmInfo.h @@ -16,66 +16,92 @@ #ifndef LLVM_TARGET_ASM_INFO_H #define LLVM_TARGET_ASM_INFO_H +#include "llvm/MC/MachineLocation.h" +#include "llvm/MC/MCDirectives.h" #include +#include namespace llvm { + class MCExpr; + class MCSection; + class MCStreamer; + class MCSymbol; + class MCContext; + + namespace ExceptionHandling { + enum ExceptionsType { None, DwarfCFI, SjLj, ARM, Win64 }; + } + + namespace LCOMM { + enum LCOMMType { NoAlignment, ByteAlignment, Log2Alignment }; + } + /// 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 }; } - class MCAsmInfo { protected: //===------------------------------------------------------------------===// // Properties to be set by the target writer, used to configure asm printer. // - /// NonexecutableStackDirective - Directive for declaring to the - /// linker and beyond that the emitted code does not require stack - /// memory to be executable. - const char *NonexecutableStackDirective; // Default is null. + /// PointerSize - Pointer size in bytes. + /// Default is 4. + unsigned PointerSize; + + /// IsLittleEndian - True if target is little endian. + /// Default is true. + bool IsLittleEndian; + + /// StackGrowsUp - True if target stack grow up. + /// Default is false. + bool StackGrowsUp; + + /// 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 "" @@ -84,17 +110,24 @@ 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" const char *InlineAsmEnd; // Defaults to "#NO_APP\n" + /// Code16Directive, Code32Directive, Code64Directive - These are assembly + /// directives that tells the assembler to interpret the following + /// instructions differently. + const char *Code16Directive; // Defaults to ".code16" + const char *Code32Directive; // Defaults to ".code32" + const char *Code64Directive; // Defaults to ".code64" + /// AssemblerDialect - Which dialect of an assembler variant to use. unsigned AssemblerDialect; // Defaults to 0 @@ -105,7 +138,20 @@ 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; + + /// AllowUTF8 - This is true if the assembler accepts UTF-8 input. + // FIXME: Make this a more general encoding setting? + bool AllowUTF8; + + /// UseDataRegionDirectives - 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; + //===--- Data Emission Directives -------------------------------------===// /// ZeroDirective - this should be set to the directive used to get some @@ -117,7 +163,7 @@ 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. @@ -131,6 +177,16 @@ namespace llvm { const char *Data32bitsDirective; // Defaults to "\t.long\t" const char *Data64bitsDirective; // Defaults to "\t.quad\t" + /// GPRel64Directive - 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. + const char *GPRel64Directive; // Defaults to NULL. + + /// 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 { @@ -144,10 +200,15 @@ 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 @@ -165,42 +226,35 @@ namespace llvm { /// space created as the result of a alignment directive. unsigned TextAlignFillValue; // Defaults to 0 - //===--- Section Switching Directives ---------------------------------===// - - /// JumpTableDirective - if non-null, the directive to emit before jump - /// table entries. FIXME: REMOVE THIS. - const char *JumpTableDirective; // Defaults to NULL. - 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. - - /// LCOMMDirective - This is the name of a directive (if supported) that can - /// be used to efficiently declare a local (internal) block of zero - /// initialized data in the .bss/.data section. The syntax expected is: - /// @verbatim SYMBOLNAME LENGTHINBYTES - /// @endverbatim - const char *LCOMMDirective; // Defaults to null. - - const char *COMMDirective; // Defaults to "\t.comm\t". - - /// COMMDirectiveTakesAlignment - True if COMMDirective take a third - /// argument that specifies the alignment of the declaration. - bool COMMDirectiveTakesAlignment; // Defaults to true. - + + /// 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. + + /// COMMDirectiveAlignmentIsInBytes - True is .comm's and .lcomms optional + /// alignment is to be specified in bytes instead of log2(n). + bool COMMDirectiveAlignmentIsInBytes; // Defaults to true; + + /// LCOMMDirectiveAlignment - Describes if the .lcomm directive for the + /// target supports an alignment argument and how it is interpreted. + LCOMM::LCOMMType LCOMMDirectiveAlignmentType; // Defaults to NoAlignment. + /// HasDotTypeDotSizeDirective - True if the target has .type and .size /// directives, this is true for most ELF targets. bool HasDotTypeDotSizeDirective; // Defaults to true. @@ -209,15 +263,18 @@ namespace llvm { /// .file directive, this is true for ELF targets. bool HasSingleParameterDotFile; // Defaults to true. - /// UsedDirective - This directive, if non-null, is used to declare a global - /// as being used somehow that the assembler can't see. This prevents dead - /// code elimination on some targets. - const char *UsedDirective; // Defaults to NULL. + /// HasNoDeadStrip - True if this target supports the MachO .no_dead_strip + /// 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. @@ -225,32 +282,25 @@ 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. - - /// HiddenDirective - This directive, if non-null, is used to declare a - /// global or function as having hidden visibility. - const char *HiddenDirective; // Defaults to "\t.hidden\t". - /// ProtectedDirective - This directive, if non-null, is used to declare a - /// global or function as having protected visibility. - const char *ProtectedDirective; // Defaults to "\t.protected\t". + /// HiddenVisibilityAttr - This attribute, if not MCSA_Invalid, is used to + /// declare a symbol as having hidden visibility. + MCSymbolAttr HiddenVisibilityAttr; // Defaults to MCSA_Hidden. - //===--- Dwarf Emission Directives -----------------------------------===// + /// HiddenDeclarationVisibilityAttr - This attribute, if not MCSA_Invalid, + /// is used to declare an undefined symbol as having hidden visibility. + MCSymbolAttr HiddenDeclarationVisibilityAttr; // Defaults to MCSA_Hidden. - /// 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; + /// 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 -----------------------------------===// /// 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. @@ -258,44 +308,50 @@ namespace llvm { /// SupportsExceptionHandling - True if target supports exception handling. ExceptionHandling::ExceptionsType ExceptionsType; // Defaults to None - /// RequiresFrameSection - true if the Dwarf2 output needs a frame section - bool DwarfRequiresFrameSection; // Defaults to true. - /// DwarfUsesInlineInfoSection - True if DwarfDebugInlineSection is used to /// 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. + /// DwarfUsesRelocationsAcrossSections - True if Dwarf2 output generally + /// uses relocations for references to other .debug_* sections. + bool DwarfUsesRelocationsAcrossSections; - /// 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. + /// DwarfRegNumForCFI - True if dwarf register numbers are printed + /// instead of symbolic register names in .cfi_* directives. + bool DwarfRegNumForCFI; // Defaults to false; - /// DwarfSectionOffsetDirective - Special section offset directive. - const char* DwarfSectionOffsetDirective; // Defaults to NULL - - //===--- CBE Asm Translation Table -----------------------------------===// + //===--- Prologue State ----------------------------------------------===// - const char *const *AsmTransCBE; // Defaults to empty + std::vector InitialFrameState; public: explicit MCAsmInfo(); virtual ~MCAsmInfo(); - /// getSLEB128Size - Compute the number of bytes required for a signed - /// leb128 value. + // FIXME: move these methods to DwarfPrinter when the JIT stops using them. static unsigned getSLEB128Size(int Value); - - /// getULEB128Size - Compute the number of bytes required for an unsigned - /// leb128 value. static unsigned getULEB128Size(unsigned Value); + /// getPointerSize - Get the pointer size in bytes. + unsigned getPointerSize() const { + return PointerSize; + } + + /// islittleendian - True if the target is little endian. + bool isLittleEndian() const { + return IsLittleEndian; + } + + /// isStackGrowthDirectionUp - True if target stack grow up. + bool isStackGrowthDirectionUp() const { + return StackGrowsUp; + } + + bool hasSubsectionsViaSymbols() const { return HasSubsectionsViaSymbols; } + // Data directive accessors. // const char *getData8bitsDirective(unsigned AS = 0) const { @@ -310,27 +366,47 @@ namespace llvm { const char *getData64bitsDirective(unsigned AS = 0) const { return AS == 0 ? Data64bitsDirective : getDataASDirective(64, AS); } + const char *getGPRel64Directive() const { return GPRel64Directive; } + 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 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; } - const char *getNonexecutableStackDirective() const { - return NonexecutableStackDirective; - } - bool needsSet() const { - return NeedsSet; + bool getLinkerRequiresNonEmptyDwarfLines() const { + return LinkerRequiresNonEmptyDwarfLines; } unsigned getMaxInstLength() const { return MaxInstLength; @@ -338,8 +414,8 @@ namespace llvm { const char *getPCSymbol() const { return PCSymbol; } - char getSeparatorChar() const { - return SeparatorChar; + const char *getSeparatorString() const { + return SeparatorString; } unsigned getCommentColumn() const { return CommentColumn; @@ -347,6 +423,9 @@ namespace llvm { const char *getCommentString() const { return CommentString; } + const char *getLabelSuffix() const { + return LabelSuffix; + } const char *getGlobalPrefix() const { return GlobalPrefix; } @@ -362,6 +441,15 @@ namespace llvm { 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; } @@ -371,6 +459,15 @@ namespace llvm { bool doesAllowNameToStartWithDigit() const { return AllowNameToStartWithDigit; } + bool doesAllowPeriodsInName() const { + return AllowPeriodsInName; + } + bool doesAllowUTF8() const { + return AllowUTF8; + } + bool doesSupportDataRegionDirectives() const { + return UseDataRegionDirectives; + } const char *getZeroDirective() const { return ZeroDirective; } @@ -380,9 +477,6 @@ namespace llvm { const char *getAscizDirective() const { return AscizDirective; } - const char *getJumpTableDirective(bool isPIC) const { - return isPIC ? PICJumpTableDirective : JumpTableDirective; - } const char *getAlignDirective() const { return AlignDirective; } @@ -398,48 +492,34 @@ namespace llvm { const char *getExternDirective() const { return ExternDirective; } - const char *getSetDirective() const { - return SetDirective; - } - const char *getLCOMMDirective() const { - return LCOMMDirective; - } - const char *getCOMMDirective() const { - return COMMDirective; - } - bool getCOMMDirectiveTakesAlignment() const { - return COMMDirectiveTakesAlignment; + bool hasSetDirective() const { return HasSetDirective; } + bool hasAggressiveSymbolFolding() const { + return HasAggressiveSymbolFolding; } - bool hasDotTypeDotSizeDirective() const { - return HasDotTypeDotSizeDirective; + bool getCOMMDirectiveAlignmentIsInBytes() const { + return COMMDirectiveAlignmentIsInBytes; } - bool hasSingleParameterDotFile() const { - return HasSingleParameterDotFile; - } - const char *getUsedDirective() const { - return UsedDirective; + LCOMM::LCOMMType getLCOMMDirectiveAlignmentType() const { + return LCOMMDirectiveAlignmentType; } + bool hasDotTypeDotSizeDirective() const {return HasDotTypeDotSizeDirective;} + 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; } - const char *getHiddenDirective() const { - return HiddenDirective; - } - const char *getProtectedDirective() const { - return ProtectedDirective; - } - bool isAbsoluteDebugSectionOffsets() const { - return AbsoluteDebugSectionOffsets; + + MCSymbolAttr getHiddenVisibilityAttr() const { return HiddenVisibilityAttr;} + MCSymbolAttr getHiddenDeclarationVisibilityAttr() const { + return HiddenDeclarationVisibilityAttr; } - bool isAbsoluteEHSectionOffsets() const { - return AbsoluteEHSectionOffsets; + MCSymbolAttr getProtectedVisibilityAttr() const { + return ProtectedVisibilityAttr; } bool hasLEB128() const { return HasLEB128; } - bool hasDotLocAndDotFile() const { - return HasDotLocAndDotFile; - } bool doesSupportDebugInformation() const { return SupportsDebugInformation; } @@ -449,26 +529,31 @@ namespace llvm { ExceptionHandling::ExceptionsType getExceptionHandlingType() const { return ExceptionsType; } - bool doesDwarfRequireFrameSection() const { - return DwarfRequiresFrameSection; + bool isExceptionHandlingDwarf() const { + return + (ExceptionsType == ExceptionHandling::DwarfCFI || + ExceptionsType == ExceptionHandling::ARM || + ExceptionsType == ExceptionHandling::Win64); } - bool doesDwarfUsesInlineInfoSection() const { + bool doesDwarfUseInlineInfoSection() const { return DwarfUsesInlineInfoSection; } - bool is_EHSymbolPrivate() const { - return Is_EHSymbolPrivate; + const char *getDwarfSectionOffsetDirective() const { + return DwarfSectionOffsetDirective; } - const char *getGlobalEHDirective() const { - return GlobalEHDirective; + bool doesDwarfUseRelocationsAcrossSections() const { + return DwarfUsesRelocationsAcrossSections; } - bool getSupportsWeakOmittedEHFrame() const { - return SupportsWeakOmittedEHFrame; + bool useDwarfRegNumForCFI() const { + return DwarfRegNumForCFI; } - const char *getDwarfSectionOffsetDirective() const { - return DwarfSectionOffsetDirective; + + void addInitialFrameState(MCSymbol *label, const MachineLocation &D, + const MachineLocation &S) { + InitialFrameState.push_back(MachineMove(label, D, S)); } - const char *const *getAsmCBE() const { - return AsmTransCBE; + const std::vector &getInitialFrameState() const { + return InitialFrameState; } }; }