include/llvm/Target/TargetAsmInfo.h - llvm - Git at Google

 //===-- llvm/Target/TargetAsmInfo.h - Asm info ------------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // 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_TARGET_ASM_INFO_H
 #define LLVM_TARGET_ASM_INFO_H

 #include "llvm/Support/DataTypes.h"
 #include <cassert>
 #include <string>

 namespace llvm {
   template <typename T> class SmallVectorImpl;

   /// TargetAsmInfo - 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 TargetAsmInfo {
   protected:
     //===------------------------------------------------------------------===//
     // Properties to be set by the target writer, used to configure asm printer.
     //

     /// 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.
     const char *NonexecutableStackDirective; // Default is null.

     /// 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.

     /// 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 ';'

     /// 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 "#"

     /// 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 ""

     /// PrivateGlobalPrefix - 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.  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 ""

     /// JumpTableSpecialLabelPrefix - If not null, a extra (dead) label is
     /// emitted before jump tables with the specified prefix.
     const char *JumpTableSpecialLabelPrefix;  // Default to null.

     /// GlobalVarAddrPrefix/Suffix - If these are nonempty, these strings
     /// will enclose any GlobalVariable (that isn't a function)
     ///
     const char *GlobalVarAddrPrefix;      // Defaults to ""
     const char *GlobalVarAddrSuffix;      // Defaults to ""

     /// FunctionAddrPrefix/Suffix - If these are nonempty, these strings
     /// will enclose any GlobalVariable that points to a function.
     ///
     const char *FunctionAddrPrefix;       // Defaults to ""
     const char *FunctionAddrSuffix;       // Defaults to ""

     /// PersonalityPrefix/Suffix - If these are nonempty, these strings will
     /// enclose any personality function in the common frame section.
     ///
     const char *PersonalityPrefix;        // Defaults to ""
     const char *PersonalitySuffix;        // Defaults to ""

     /// NeedsIndirectEncoding - If set, we need to set the indirect encoding bit
     /// for EH in Dwarf.
     ///
     bool NeedsIndirectEncoding;           // Defaults to false

     /// 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"

     /// AssemblerDialect - Which dialect of an assembler variant to use.
     unsigned AssemblerDialect;            // Defaults to 0

     /// 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
     /// number of zero bytes emitted to the current section.  Common cases are
     /// "\t.zero\t" and "\t.space\t".  If this is set to null, the
     /// Data*bitsDirective's will be used to emit zero bytes.
     const char *ZeroDirective;            // Defaults to "\t.zero\t"
     const char *ZeroDirectiveSuffix;      // Defaults to ""

     /// 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.
     const char *AscizDirective;           // Defaults to "\t.asciz\t"

     /// DataDirectives - 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.
     const char *Data8bitsDirective;       // Defaults to "\t.byte\t"
     const char *Data16bitsDirective;      // Defaults to "\t.short\t"
     const char *Data32bitsDirective;      // Defaults to "\t.long\t"
     const char *Data64bitsDirective;      // Defaults to "\t.quad\t"

     /// 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 {
       assert(AS != 0 && "Don't know the directives for default addr space");
       return NULL;
     }

     /// SunStyleELFSectionSwitchSyntax - 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.
     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
     /// which doesn't support the '.bss' directive only.
     bool UsesELFSectionDirectiveForBSS;  // Defaults to false.

     //===--- Alignment Information ----------------------------------------===//

     /// AlignDirective - The directive used to emit round up to an alignment
     /// boundary.
     ///
     const char *AlignDirective;           // Defaults to "\t.align\t"

     /// AlignmentIsInBytes - 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.
     bool AlignmentIsInBytes;              // Defaults to true

     /// TextAlignFillValue - If non-zero, this is used to fill the executable
     /// space created as the result of a alignment directive.
     unsigned TextAlignFillValue;

     //===--- Section Switching Directives ---------------------------------===//

     /// JumpTableDirective - if non-null, the directive to emit before jump
     /// table entries.  FIXME: REMOVE THIS.
     const char *JumpTableDirective;
     const char *PICJumpTableDirective;


     //===--- 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.
     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 <LCOMMDirective> SYMBOLNAME LENGTHINBYTES, ALIGNMENT
     /// @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.

     /// 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.
     const char *UsedDirective;            // Defaults to null.

     /// 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.

     /// 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".

     //===--- Dwarf Emission Directives -----------------------------------===//

     /// AbsoluteDebugSectionOffsets - True if we should emit abolute section
     /// offsets for debug information. Defaults to false.
     bool AbsoluteDebugSectionOffsets;

     /// 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;

     /// SupportsExceptionHandling - True if target supports
     /// exception handling.
     ///
     // Defaults to None
     ExceptionHandling::ExceptionsType ExceptionsType;

     /// 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.
     ///
     const char *GlobalEHDirective;          // Defaults to NULL.

     /// 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.

     /// DwarfSectionOffsetDirective - Special section offset directive.
     const char* DwarfSectionOffsetDirective; // Defaults to NULL

     //===--- CBE Asm Translation Table -----------------------------------===//

     const char *const *AsmTransCBE; // Defaults to empty

   public:
     explicit TargetAsmInfo();
     virtual ~TargetAsmInfo();

     /// 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 : getDataASDirective(8, AS);
     }
     const char *getData16bitsDirective(unsigned AS = 0) const {
       return AS == 0 ? Data16bitsDirective : getDataASDirective(16, AS);
     }
     const char *getData32bitsDirective(unsigned AS = 0) const {
       return AS == 0 ? Data32bitsDirective : getDataASDirective(32, AS);
     }
     const char *getData64bitsDirective(unsigned AS = 0) const {
       return AS == 0 ? Data64bitsDirective : getDataASDirective(64, AS);
     }


     bool usesSunStyleELFSectionSwitchSyntax() const {
       return SunStyleELFSectionSwitchSyntax;
     }

     bool usesELFSectionDirectiveForBSS() const {
       return UsesELFSectionDirectiveForBSS;
     }

     // Accessors.
     //
     const char *getZeroFillDirective() const {
       return ZeroFillDirective;
     }
     const char *getNonexecutableStackDirective() const {
       return NonexecutableStackDirective;
     }
     bool needsSet() const {
       return NeedsSet;
     }
     unsigned getMaxInstLength() const {
       return MaxInstLength;
     }
     const char *getPCSymbol() const {
       return PCSymbol;
     }
     char getSeparatorChar() const {
       return SeparatorChar;
     }
     unsigned getCommentColumn() const {
       return CommentColumn;
     }
     const char *getCommentString() const {
       return CommentString;
     }
     const char *getGlobalPrefix() const {
       return GlobalPrefix;
     }
     const char *getPrivateGlobalPrefix() const {
       return PrivateGlobalPrefix;
     }
     const char *getLinkerPrivateGlobalPrefix() const {
       return LinkerPrivateGlobalPrefix;
     }
     const char *getJumpTableSpecialLabelPrefix() const {
       return JumpTableSpecialLabelPrefix;
     }
     const char *getGlobalVarAddrPrefix() const {
       return GlobalVarAddrPrefix;
     }
     const char *getGlobalVarAddrSuffix() const {
       return GlobalVarAddrSuffix;
     }
     const char *getFunctionAddrPrefix() const {
       return FunctionAddrPrefix;
     }
     const char *getFunctionAddrSuffix() const {
       return FunctionAddrSuffix;
     }
     const char *getPersonalityPrefix() const {
       return PersonalityPrefix;
     }
     const char *getPersonalitySuffix() const {
       return PersonalitySuffix;
     }
     bool getNeedsIndirectEncoding() const {
       return NeedsIndirectEncoding;
     }
     const char *getInlineAsmStart() const {
       return InlineAsmStart;
     }
     const char *getInlineAsmEnd() const {
       return InlineAsmEnd;
     }
     unsigned getAssemblerDialect() const {
       return AssemblerDialect;
     }
     bool doesAllowQuotesInName() const {
       return AllowQuotesInName;
     }
     const char *getZeroDirective() const {
       return ZeroDirective;
     }
     const char *getZeroDirectiveSuffix() const {
       return ZeroDirectiveSuffix;
     }
     const char *getAsciiDirective() const {
       return AsciiDirective;
     }
     const char *getAscizDirective() const {
       return AscizDirective;
     }
     const char *getJumpTableDirective(bool isPIC) const {
       return isPIC ? PICJumpTableDirective : JumpTableDirective;
     }
     const char *getAlignDirective() const {
       return AlignDirective;
     }
     bool getAlignmentIsInBytes() const {
       return AlignmentIsInBytes;
     }
     unsigned getTextAlignFillValue() const {
       return TextAlignFillValue;
     }
     const char *getGlobalDirective() const {
       return GlobalDirective;
     }
     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 hasDotTypeDotSizeDirective() const {
       return HasDotTypeDotSizeDirective;
     }
     bool hasSingleParameterDotFile() const {
       return HasSingleParameterDotFile;
     }
     const char *getUsedDirective() const {
       return UsedDirective;
     }
     const char *getWeakRefDirective() const {
       return WeakRefDirective;
     }
     const char *getWeakDefDirective() const {
       return WeakDefDirective;
     }
     const char *getHiddenDirective() const {
       return HiddenDirective;
     }
     const char *getProtectedDirective() const {
       return ProtectedDirective;
     }
     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;
     }
     bool doesSupportExceptionHandling() const {
       return ExceptionsType != ExceptionHandling::None;
     }
     ExceptionHandling::ExceptionsType getExceptionHandlingType() const {
       return ExceptionsType;
     }
     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;
     }
     const char *const *getAsmCBE() const {
       return AsmTransCBE;
     }
   };
 }

 #endif
	//===-- llvm/Target/TargetAsmInfo.h - Asm info ------------------- C++ --===//
	//
	// The LLVM Compiler Infrastructure
	//
	// This file is distributed under the University of Illinois Open Source
	// License. See LICENSE.TXT for details.
	//
	//===----------------------------------------------------------------------===//
	//
	// 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_TARGET_ASM_INFO_H
	#define LLVM_TARGET_ASM_INFO_H

	#include "llvm/Support/DataTypes.h"
	#include <cassert>
	#include <string>

	namespace llvm {
	template <typename T> class SmallVectorImpl;

	/// TargetAsmInfo - 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 TargetAsmInfo {
	protected:
	//===------------------------------------------------------------------===//
	// Properties to be set by the target writer, used to configure asm printer.
	//

	/// 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.
	const char *NonexecutableStackDirective; // Default is null.

	/// 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.

	/// 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 ';'

	/// 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 "#"

	/// 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 ""

	/// PrivateGlobalPrefix - 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. 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 ""

	/// JumpTableSpecialLabelPrefix - If not null, a extra (dead) label is
	/// emitted before jump tables with the specified prefix.
	const char *JumpTableSpecialLabelPrefix; // Default to null.

	/// GlobalVarAddrPrefix/Suffix - If these are nonempty, these strings
	/// will enclose any GlobalVariable (that isn't a function)
	///
	const char *GlobalVarAddrPrefix; // Defaults to ""
	const char *GlobalVarAddrSuffix; // Defaults to ""

	/// FunctionAddrPrefix/Suffix - If these are nonempty, these strings
	/// will enclose any GlobalVariable that points to a function.
	///
	const char *FunctionAddrPrefix; // Defaults to ""
	const char *FunctionAddrSuffix; // Defaults to ""

	/// PersonalityPrefix/Suffix - If these are nonempty, these strings will
	/// enclose any personality function in the common frame section.
	///
	const char *PersonalityPrefix; // Defaults to ""
	const char *PersonalitySuffix; // Defaults to ""

	/// NeedsIndirectEncoding - If set, we need to set the indirect encoding bit
	/// for EH in Dwarf.
	///
	bool NeedsIndirectEncoding; // Defaults to false

	/// 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"

	/// AssemblerDialect - Which dialect of an assembler variant to use.
	unsigned AssemblerDialect; // Defaults to 0

	/// 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
	/// number of zero bytes emitted to the current section. Common cases are
	/// "\t.zero\t" and "\t.space\t". If this is set to null, the
	/// Data*bitsDirective's will be used to emit zero bytes.
	const char *ZeroDirective; // Defaults to "\t.zero\t"
	const char *ZeroDirectiveSuffix; // Defaults to ""

	/// 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.
	const char *AscizDirective; // Defaults to "\t.asciz\t"

	/// DataDirectives - 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.
	const char *Data8bitsDirective; // Defaults to "\t.byte\t"
	const char *Data16bitsDirective; // Defaults to "\t.short\t"
	const char *Data32bitsDirective; // Defaults to "\t.long\t"
	const char *Data64bitsDirective; // Defaults to "\t.quad\t"

	/// 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 {
	assert(AS != 0 && "Don't know the directives for default addr space");
	return NULL;
	}

	/// SunStyleELFSectionSwitchSyntax - 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.
	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
	/// which doesn't support the '.bss' directive only.
	bool UsesELFSectionDirectiveForBSS; // Defaults to false.

	//===--- Alignment Information ----------------------------------------===//

	/// AlignDirective - The directive used to emit round up to an alignment
	/// boundary.
	///
	const char *AlignDirective; // Defaults to "\t.align\t"

	/// AlignmentIsInBytes - 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.
	bool AlignmentIsInBytes; // Defaults to true

	/// TextAlignFillValue - If non-zero, this is used to fill the executable
	/// space created as the result of a alignment directive.
	unsigned TextAlignFillValue;

	//===--- Section Switching Directives ---------------------------------===//

	/// JumpTableDirective - if non-null, the directive to emit before jump
	/// table entries. FIXME: REMOVE THIS.
	const char *JumpTableDirective;
	const char *PICJumpTableDirective;


	//===--- 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.
	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 <LCOMMDirective> SYMBOLNAME LENGTHINBYTES, ALIGNMENT
	/// @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.

	/// 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.
	const char *UsedDirective; // Defaults to null.

	/// 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.

	/// 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".

	//===--- Dwarf Emission Directives -----------------------------------===//

	/// AbsoluteDebugSectionOffsets - True if we should emit abolute section
	/// offsets for debug information. Defaults to false.
	bool AbsoluteDebugSectionOffsets;

	/// 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;

	/// SupportsExceptionHandling - True if target supports
	/// exception handling.
	///
	// Defaults to None
	ExceptionHandling::ExceptionsType ExceptionsType;

	/// 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.
	///
	const char *GlobalEHDirective; // Defaults to NULL.

	/// 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.

	/// DwarfSectionOffsetDirective - Special section offset directive.
	const char* DwarfSectionOffsetDirective; // Defaults to NULL

	//===--- CBE Asm Translation Table -----------------------------------===//

	const char const AsmTransCBE; // Defaults to empty

	public:
	explicit TargetAsmInfo();
	virtual ~TargetAsmInfo();

	/// 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 : getDataASDirective(8, AS);
	}
	const char *getData16bitsDirective(unsigned AS = 0) const {
	return AS == 0 ? Data16bitsDirective : getDataASDirective(16, AS);
	}
	const char *getData32bitsDirective(unsigned AS = 0) const {
	return AS == 0 ? Data32bitsDirective : getDataASDirective(32, AS);
	}
	const char *getData64bitsDirective(unsigned AS = 0) const {
	return AS == 0 ? Data64bitsDirective : getDataASDirective(64, AS);
	}


	bool usesSunStyleELFSectionSwitchSyntax() const {
	return SunStyleELFSectionSwitchSyntax;
	}

	bool usesELFSectionDirectiveForBSS() const {
	return UsesELFSectionDirectiveForBSS;
	}

	// Accessors.
	//
	const char *getZeroFillDirective() const {
	return ZeroFillDirective;
	}
	const char *getNonexecutableStackDirective() const {
	return NonexecutableStackDirective;
	}
	bool needsSet() const {
	return NeedsSet;
	}
	unsigned getMaxInstLength() const {
	return MaxInstLength;
	}
	const char *getPCSymbol() const {
	return PCSymbol;
	}
	char getSeparatorChar() const {
	return SeparatorChar;
	}
	unsigned getCommentColumn() const {
	return CommentColumn;
	}
	const char *getCommentString() const {
	return CommentString;
	}
	const char *getGlobalPrefix() const {
	return GlobalPrefix;
	}
	const char *getPrivateGlobalPrefix() const {
	return PrivateGlobalPrefix;
	}
	const char *getLinkerPrivateGlobalPrefix() const {
	return LinkerPrivateGlobalPrefix;
	}
	const char *getJumpTableSpecialLabelPrefix() const {
	return JumpTableSpecialLabelPrefix;
	}
	const char *getGlobalVarAddrPrefix() const {
	return GlobalVarAddrPrefix;
	}
	const char *getGlobalVarAddrSuffix() const {
	return GlobalVarAddrSuffix;
	}
	const char *getFunctionAddrPrefix() const {
	return FunctionAddrPrefix;
	}
	const char *getFunctionAddrSuffix() const {
	return FunctionAddrSuffix;
	}
	const char *getPersonalityPrefix() const {
	return PersonalityPrefix;
	}
	const char *getPersonalitySuffix() const {
	return PersonalitySuffix;
	}
	bool getNeedsIndirectEncoding() const {
	return NeedsIndirectEncoding;
	}
	const char *getInlineAsmStart() const {
	return InlineAsmStart;
	}
	const char *getInlineAsmEnd() const {
	return InlineAsmEnd;
	}
	unsigned getAssemblerDialect() const {
	return AssemblerDialect;
	}
	bool doesAllowQuotesInName() const {
	return AllowQuotesInName;
	}
	const char *getZeroDirective() const {
	return ZeroDirective;
	}
	const char *getZeroDirectiveSuffix() const {
	return ZeroDirectiveSuffix;
	}
	const char *getAsciiDirective() const {
	return AsciiDirective;
	}
	const char *getAscizDirective() const {
	return AscizDirective;
	}
	const char *getJumpTableDirective(bool isPIC) const {
	return isPIC ? PICJumpTableDirective : JumpTableDirective;
	}
	const char *getAlignDirective() const {
	return AlignDirective;
	}
	bool getAlignmentIsInBytes() const {
	return AlignmentIsInBytes;
	}
	unsigned getTextAlignFillValue() const {
	return TextAlignFillValue;
	}
	const char *getGlobalDirective() const {
	return GlobalDirective;
	}
	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 hasDotTypeDotSizeDirective() const {
	return HasDotTypeDotSizeDirective;
	}
	bool hasSingleParameterDotFile() const {
	return HasSingleParameterDotFile;
	}
	const char *getUsedDirective() const {
	return UsedDirective;
	}
	const char *getWeakRefDirective() const {
	return WeakRefDirective;
	}
	const char *getWeakDefDirective() const {
	return WeakDefDirective;
	}
	const char *getHiddenDirective() const {
	return HiddenDirective;
	}
	const char *getProtectedDirective() const {
	return ProtectedDirective;
	}
	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;
	}
	bool doesSupportExceptionHandling() const {
	return ExceptionsType != ExceptionHandling::None;
	}
	ExceptionHandling::ExceptionsType getExceptionHandlingType() const {
	return ExceptionsType;
	}
	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;
	}
	const char const getAsmCBE() const {
	return AsmTransCBE;
	}
	};
	}

	#endif