X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FTarget%2FTargetAsmInfo.h;h=50e08bda445c9118bcfe829fdb15337846c27157;hb=617dd7baa6dfd3a7b5ee72ace37f6b6aeaa6006b;hp=7656ad67e91b960abcace44a4b634d034d5b1aa1;hpb=555507896038323b5d8396279ed7a8cf46c4710e;p=oota-llvm.git diff --git a/include/llvm/Target/TargetAsmInfo.h b/include/llvm/Target/TargetAsmInfo.h index 7656ad67e91..50e08bda445 100644 --- a/include/llvm/Target/TargetAsmInfo.h +++ b/include/llvm/Target/TargetAsmInfo.h @@ -16,7 +16,10 @@ #ifndef LLVM_TARGET_ASM_INFO_H #define LLVM_TARGET_ASM_INFO_H +#include "llvm/ADT/DenseMap.h" +#include "llvm/ADT/StringMap.h" #include "llvm/Support/DataTypes.h" +#include namespace llvm { // DWARF encoding query type @@ -33,72 +36,155 @@ namespace llvm { Unknown = 0, ///< Custom section Text, ///< Text section Data, ///< Data section + DataRel, ///< Contains data that has relocations + DataRelLocal, ///< Contains data that has only local relocations BSS, ///< BSS section ROData, ///< Readonly data section + DataRelRO, ///< Contains data that is otherwise readonly + DataRelROLocal, ///< Contains r/o data with only local relocations RODataMergeStr, ///< Readonly data section (mergeable strings) RODataMergeConst, ///< Readonly data section (mergeable constants) + SmallData, ///< Small data section + SmallBSS, ///< Small bss section + SmallROData, ///< Small readonly section ThreadData, ///< Initialized TLS data objects ThreadBSS ///< Uninitialized TLS data objects }; + + static inline bool isReadOnly(Kind K) { + return (K == SectionKind::ROData || + K == SectionKind::RODataMergeConst || + K == SectionKind::RODataMergeStr || + K == SectionKind::SmallROData); + } + + static inline bool isBSS(Kind K) { + return (K == SectionKind::BSS || + K == SectionKind::SmallBSS); + } } namespace SectionFlags { - enum Flags { - None = 0, - Code = 1 << 0, ///< Section contains code - Writeable = 1 << 1, ///< Section is writeable - BSS = 1 << 2, ///< Section contains only zeroes - Mergeable = 1 << 3, ///< Section contains mergeable data - Strings = 1 << 4, ///< Section contains null-terminated strings - TLS = 1 << 5, ///< Section contains thread-local data - Debug = 1 << 6, ///< Section contains debug data - Linkonce = 1 << 7 ///< Section is linkonce + const unsigned Invalid = -1U; + const unsigned None = 0; + const unsigned Code = 1 << 0; ///< Section contains code + const unsigned Writeable = 1 << 1; ///< Section is writeable + const unsigned BSS = 1 << 2; ///< Section contains only zeroes + const unsigned Mergeable = 1 << 3; ///< Section contains mergeable data + const unsigned Strings = 1 << 4; ///< Section contains C-type strings + const unsigned TLS = 1 << 5; ///< Section contains thread-local data + const unsigned Debug = 1 << 6; ///< Section contains debug data + const unsigned Linkonce = 1 << 7; ///< Section is linkonce + const unsigned Small = 1 << 8; ///< Section is small + const unsigned TypeFlags = 0xFF; + // Some gap for future flags + const unsigned Named = 1 << 23; ///< Section is named + const unsigned EntitySize = 0xFF << 24; ///< Entity size for mergeable stuff + + static inline unsigned getEntitySize(unsigned Flags) { + return (Flags >> 24) & 0xFF; + } + + static inline unsigned setEntitySize(unsigned Flags, unsigned Size) { + return ((Flags & ~EntitySize) | ((Size & 0xFF) << 24)); + } + + struct KeyInfo { + static inline unsigned getEmptyKey() { return Invalid; } + static inline unsigned getTombstoneKey() { return Invalid - 1; } + static unsigned getHashValue(const unsigned &Key) { return Key; } + static bool isEqual(unsigned LHS, unsigned RHS) { return LHS == RHS; } + static bool isPod() { return true; } }; - } - struct SectionInfo { - SectionKind::Kind kind; - SectionFlags::Flags flags; - }; + typedef DenseMap FlagsStringsMapType; + } class TargetMachine; class CallInst; class GlobalValue; + class Type; + class Mangler; + + class Section { + friend class TargetAsmInfo; + friend class StringMapEntry
; + friend class StringMap
; + + std::string Name; + unsigned Flags; + explicit Section(unsigned F = SectionFlags::Invalid):Flags(F) { } + + public: + + bool isNamed() const { return Flags & SectionFlags::Named; } + unsigned getEntitySize() const { return (Flags >> 24) & 0xFF; } + + const std::string& getName() const { return Name; } + unsigned getFlags() const { return Flags; } + }; /// TargetAsmInfo - This class is intended to be used as a base class for asm /// properties and features specific to the target. class TargetAsmInfo { + private: + mutable StringMap
Sections; + mutable SectionFlags::FlagsStringsMapType FlagsStrings; protected: + /// TM - The current TargetMachine. + const TargetMachine &TM; + //===------------------------------------------------------------------===// // Properties to be set by the target writer, used to configure asm printer. // - + /// TextSection - Section directive for standard text. /// - const char *TextSection; // Defaults to ".text". - + const Section *TextSection; // Defaults to ".text". + /// DataSection - Section directive for standard data. /// - const char *DataSection; // Defaults to ".data". + const Section *DataSection; // Defaults to ".data". /// BSSSection - Section directive for uninitialized data. Null if this /// target doesn't support a BSS section. /// const char *BSSSection; // Default to ".bss". + const Section *BSSSection_; + + /// ReadOnlySection - This is the directive that is emitted to switch to a + /// read-only section for constant data (e.g. data declared const, + /// jump tables). + const Section *ReadOnlySection; // Defaults to NULL + + /// SmallDataSection - This is the directive that is emitted to switch to a + /// small data section. + /// + const Section *SmallDataSection; // Defaults to NULL + + /// SmallBSSSection - This is the directive that is emitted to switch to a + /// small bss section. + /// + const Section *SmallBSSSection; // Defaults to NULL + + /// SmallRODataSection - This is the directive that is emitted to switch to + /// a small read-only data section. + /// + const Section *SmallRODataSection; // Defaults to NULL /// TLSDataSection - Section directive for Thread Local data. /// - const char *TLSDataSection;// Defaults to ".section .tdata,"awT",@progbits". + const Section *TLSDataSection; // Defaults to ".tdata". /// TLSBSSSection - Section directive for Thread Local uninitialized data. /// Null if this target doesn't support a BSS section. /// - const char *TLSBSSSection;// Default to ".section .tbss,"awT",@nobits". + const Section *TLSBSSSection; // Defaults to ".tbss". /// ZeroFillDirective - Directive for emitting a global to the ZeroFill /// section on this target. Null if this target doesn't support zerofill. const char *ZeroFillDirective; // Default is null. - + /// NonexecutableStackDirective - Directive for declaring to the /// linker and beyond that the emitted code does not require stack /// memory to be executable. @@ -128,6 +214,10 @@ namespace llvm { /// measure inline asm instructions. char SeparatorChar; // Defaults to ';' + /// CommentColumn - This indicates the comment num (zero-based) at + /// which asm comments should be printed. + unsigned CommentColumn; // Defaults to 60 + /// CommentString - This indicates the comment character used by the /// assembler. const char *CommentString; // Defaults to "#" @@ -137,10 +227,15 @@ namespace llvm { const char *GlobalPrefix; // Defaults to "" /// PrivateGlobalPrefix - This prefix is used for globals like constant - /// pool entries that are completely private to the .o file and should not + /// 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 "." + /// LessPrivateGlobalPrefix - 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 *LessPrivateGlobalPrefix; // Defaults to "" + /// JumpTableSpecialLabelPrefix - If not null, a extra (dead) label is /// emitted before jump tables with the specified prefix. const char *JumpTableSpecialLabelPrefix; // Default to null. @@ -180,12 +275,10 @@ namespace llvm { /// AssemblerDialect - Which dialect of an assembler variant to use. unsigned AssemblerDialect; // Defaults to 0 - /// StringConstantPrefix - Prefix for FEs to use when generating unnamed - /// constant strings. These names get run through the Mangler later; if - /// you want the Mangler not to add the GlobalPrefix as well, - /// use '\1' as the first character. - const char *StringConstantPrefix; // Defaults to ".str" - + /// AllowQuotesInName - This is true if the assembler allows for complex + /// symbol names to be surrounded in quotes. This defaults to false. + bool AllowQuotesInName; + //===--- Data Emission Directives -------------------------------------===// /// ZeroDirective - this should be set to the directive used to get some @@ -212,6 +305,14 @@ namespace llvm { const char *Data32bitsDirective; // Defaults to "\t.long\t" const char *Data64bitsDirective; // Defaults to "\t.quad\t" + /// getASDirective - Targets can override it to provide different data + /// directives for various sizes and non-default address spaces. + virtual const char *getASDirective(unsigned size, + unsigned AS) const { + assert(AS > 0 && "Dont know the directives for default addr space"); + return NULL; + } + //===--- Alignment Information ----------------------------------------===// /// AlignDirective - The directive used to emit round up to an alignment @@ -266,6 +367,7 @@ namespace llvm { /// other null bytes) on this target. This is commonly supported as /// ".cstring". const char *CStringSection; // Defaults to NULL + const Section *CStringSection_; /// StaticCtorsSection - This is the directive that is emitted to switch to /// a section to emit the static constructor list. @@ -277,23 +379,16 @@ namespace llvm { /// Defaults to "\t.section .dtors,\"aw\",@progbits". const char *StaticDtorsSection; - /// FourByteConstantSection, EightByteConstantSection, - /// SixteenByteConstantSection - These are special sections where we place - /// 4-, 8-, and 16- byte constant literals. - const char *FourByteConstantSection; - const char *EightByteConstantSection; - const char *SixteenByteConstantSection; - - /// ReadOnlySection - This is the directive that is emitted to switch to a - /// read-only section for constant data (e.g. data declared const, - /// jump tables). - const char *ReadOnlySection; // 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 + /// 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. @@ -315,7 +410,11 @@ namespace llvm { /// HasDotTypeDotSizeDirective - True if the target has .type and .size /// directives, this is true for most ELF targets. bool HasDotTypeDotSizeDirective; // Defaults to true. - + + /// HasSingleParameterDotFile - True if the target has a single parameter + /// .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. @@ -350,25 +449,33 @@ namespace llvm { /// 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; - + /// SupportsExceptionHandling - True if target supports /// exception handling. /// bool SupportsExceptionHandling; // Defaults to false. - + /// 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. + /// GlobalEHDirective - This is the directive used to make exception frame /// tables globally visible. /// @@ -404,7 +511,11 @@ namespace llvm { /// DwarfPubTypesSection - Section directive for Dwarf info. /// const char *DwarfPubTypesSection; // Defaults to ".debug_pubtypes". - + + /// DwarfDebugInlineSection - Section directive for inline info. + /// + const char *DwarfDebugInlineSection; // Defaults to ".debug_inlined" + /// DwarfStrSection - Section directive for Dwarf info. /// const char *DwarfStrSection; // Defaults to ".debug_str". @@ -421,9 +532,9 @@ namespace llvm { /// const char *DwarfRangesSection; // Defaults to ".debug_ranges". - /// DwarfMacInfoSection - Section directive for Dwarf info. + /// DwarfMacroInfoSection - Section directive for DWARF macro info. /// - const char *DwarfMacInfoSection; // Defaults to ".debug_macinfo". + const char *DwarfMacroInfoSection; // Defaults to ".debug_macinfo". /// DwarfEHFrameSection - Section directive for Exception frames. /// @@ -438,9 +549,16 @@ namespace llvm { const char *const *AsmTransCBE; // Defaults to empty public: - TargetAsmInfo(); + explicit TargetAsmInfo(const TargetMachine &TM); virtual ~TargetAsmInfo(); + const Section* getNamedSection(const char *Name, + unsigned Flags = SectionFlags::None, + bool Override = false) const; + const Section* getUnnamedSection(const char *Directive, + unsigned Flags = SectionFlags::None, + bool Override = false) const; + /// Measure the specified inline asm to determine an approximation of its /// length. virtual unsigned getInlineAsmLength(const char *Str) const; @@ -453,6 +571,13 @@ namespace llvm { return false; } + /// emitUsedDirectiveFor - This hook allows targets to selectively decide + /// not to emit the UsedDirective for some symbols in llvm.used. + virtual bool emitUsedDirectiveFor(const GlobalValue *GV, + Mangler *Mang) const { + return (GV!=0); + } + /// PreferredEHDataFormat - This hook allows the target to select data /// format used for encoding pointers in exception handling data. Reason is /// 0 for data, 1 for code labels, 2 for function pointers. Global is true @@ -465,6 +590,12 @@ namespace llvm { virtual SectionKind::Kind SectionKindForGlobal(const GlobalValue *GV) const; + /// RelocBehaviour - Describes how relocations should be treated when + /// selecting sections. Reloc::Global bit should be set if global + /// relocations should force object to be placed in read-write + /// sections. Reloc::Local bit should be set if local relocations should + /// force object to be placed in read-write sections. + virtual unsigned RelocBehaviour() const; /// SectionFlagsForGlobal - This hook allows the target to select proper /// section flags either for given global or for section. @@ -474,23 +605,75 @@ namespace llvm { /// SectionForGlobal - This hooks returns proper section name for given /// global with all necessary flags and marks. - virtual const char* SectionForGlobal(const GlobalValue *GV) const; + virtual const Section* SectionForGlobal(const GlobalValue *GV) const; + + // Helper methods for SectionForGlobal + virtual std::string UniqueSectionForGlobal(const GlobalValue* GV, + SectionKind::Kind kind) const; + + const std::string& getSectionFlags(unsigned Flags) const; + virtual std::string printSectionFlags(unsigned flags) const { return ""; } + + virtual const Section* SelectSectionForGlobal(const GlobalValue *GV) const; + + virtual const Section* SelectSectionForMachineConst(const Type *Ty) const; + + /// getSLEB128Size - Compute the number of bytes required for a signed + /// leb128 value. + + static unsigned getSLEB128Size(int Value); + + /// getULEB128Size - Compute the number of bytes required for an unsigned + /// leb128 value. + + static unsigned getULEB128Size(unsigned Value); + + // Data directive accessors + // + const char *getData8bitsDirective(unsigned AS = 0) const { + return AS == 0 ? Data8bitsDirective : getASDirective(8, AS); + } + const char *getData16bitsDirective(unsigned AS = 0) const { + return AS == 0 ? Data16bitsDirective : getASDirective(16, AS); + } + const char *getData32bitsDirective(unsigned AS = 0) const { + return AS == 0 ? Data32bitsDirective : getASDirective(32, AS); + } + const char *getData64bitsDirective(unsigned AS = 0) const { + return AS == 0 ? Data64bitsDirective : getASDirective(64, AS); + } + // Accessors. // - const char *getTextSection() const { + const Section *getTextSection() const { return TextSection; } - const char *getDataSection() const { + const Section *getDataSection() const { return DataSection; } const char *getBSSSection() const { return BSSSection; } - const char *getTLSDataSection() const { + const Section *getBSSSection_() const { + return BSSSection_; + } + const Section *getReadOnlySection() const { + return ReadOnlySection; + } + const Section *getSmallDataSection() const { + return SmallDataSection; + } + const Section *getSmallBSSSection() const { + return SmallBSSSection; + } + const Section *getSmallRODataSection() const { + return SmallRODataSection; + } + const Section *getTLSDataSection() const { return TLSDataSection; } - const char *getTLSBSSSection() const { + const Section *getTLSBSSSection() const { return TLSBSSSection; } const char *getZeroFillDirective() const { @@ -508,6 +691,9 @@ namespace llvm { char getSeparatorChar() const { return SeparatorChar; } + unsigned getCommentColumn() const { + return CommentColumn; + } const char *getCommentString() const { return CommentString; } @@ -517,6 +703,9 @@ namespace llvm { const char *getPrivateGlobalPrefix() const { return PrivateGlobalPrefix; } + const char *getLessPrivateGlobalPrefix() const { + return LessPrivateGlobalPrefix; + } const char *getJumpTableSpecialLabelPrefix() const { return JumpTableSpecialLabelPrefix; } @@ -550,8 +739,8 @@ namespace llvm { unsigned getAssemblerDialect() const { return AssemblerDialect; } - const char *getStringConstantPrefix() const { - return StringConstantPrefix; + bool doesAllowQuotesInName() const { + return AllowQuotesInName; } const char *getZeroDirective() const { return ZeroDirective; @@ -565,18 +754,6 @@ namespace llvm { const char *getAscizDirective() const { return AscizDirective; } - const char *getData8bitsDirective() const { - return Data8bitsDirective; - } - const char *getData16bitsDirective() const { - return Data16bitsDirective; - } - const char *getData32bitsDirective() const { - return Data32bitsDirective; - } - const char *getData64bitsDirective() const { - return Data64bitsDirective; - } const char *getJumpTableDirective() const { return JumpTableDirective; } @@ -610,27 +787,21 @@ namespace llvm { const char *getCStringSection() const { return CStringSection; } + const Section *getCStringSection_() const { + return CStringSection_; + } const char *getStaticCtorsSection() const { return StaticCtorsSection; } const char *getStaticDtorsSection() const { return StaticDtorsSection; } - const char *getFourByteConstantSection() const { - return FourByteConstantSection; - } - const char *getEightByteConstantSection() const { - return EightByteConstantSection; - } - const char *getSixteenByteConstantSection() const { - return SixteenByteConstantSection; - } - const char *getReadOnlySection() const { - return ReadOnlySection; - } const char *getGlobalDirective() const { return GlobalDirective; } + const char *getExternDirective() const { + return ExternDirective; + } const char *getSetDirective() const { return SetDirective; } @@ -646,6 +817,9 @@ namespace llvm { bool hasDotTypeDotSizeDirective() const { return HasDotTypeDotSizeDirective; } + bool hasSingleParameterDotFile() const { + return HasSingleParameterDotFile; + } const char *getUsedDirective() const { return UsedDirective; } @@ -682,6 +856,12 @@ namespace llvm { bool doesDwarfRequireFrameSection() const { return DwarfRequiresFrameSection; } + bool doesDwarfUsesInlineInfoSection() const { + return DwarfUsesInlineInfoSection; + } + bool is_EHSymbolPrivate() const { + return Is_EHSymbolPrivate; + } const char *getGlobalEHDirective() const { return GlobalEHDirective; } @@ -709,6 +889,9 @@ namespace llvm { const char *getDwarfPubTypesSection() const { return DwarfPubTypesSection; } + const char *getDwarfDebugInlineSection() const { + return DwarfDebugInlineSection; + } const char *getDwarfStrSection() const { return DwarfStrSection; } @@ -721,8 +904,8 @@ namespace llvm { const char *getDwarfRangesSection() const { return DwarfRangesSection; } - const char *getDwarfMacInfoSection() const { - return DwarfMacInfoSection; + const char *getDwarfMacroInfoSection() const { + return DwarfMacroInfoSection; } const char *getDwarfEHFrameSection() const { return DwarfEHFrameSection; @@ -737,4 +920,3 @@ namespace llvm { } #endif -