#ifndef LLVM_TARGET_ASM_INFO_H
#define LLVM_TARGET_ASM_INFO_H
-#include "llvm/Support/DataTypes.h"
+#include "llvm/MC/MCDirectives.h"
#include <cassert>
-#include <string>
namespace llvm {
- template <typename T> class SmallVectorImpl;
+ class MCSection;
+ class MCContext;
/// MCAsmInfo - This class is intended to be used as a base class for asm
/// properties and features specific to the target.
// 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.
-
+ /// 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.
+
+ /// 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:
/// .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.
+ 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.
+ unsigned MaxInstLength; // Defaults to 4.
/// PCSymbol - The symbol used to represent the current PC. Used in PC
/// relative expressions.
- const char *PCSymbol; // Defaults to "$".
+ const char *PCSymbol; // Defaults to "$".
/// 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 ';'
+ char SeparatorChar; // 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 60
/// CommentString - This indicates the comment character used by the
/// assembler.
- const char *CommentString; // Defaults to "#"
+ 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 ""
+ 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 "."
+ 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.
+ const char *LinkerPrivateGlobalPrefix; // Defaults to ""
- /// 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"
+ 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
+ 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;
+
+ /// AllowNameToStartWithDigit - This is true if the assembler allows symbol
+ /// names to start with a digit (e.g., "0x0021"). This defaults to false.
+ bool AllowNameToStartWithDigit;
//===--- Data Emission Directives -------------------------------------===//
/// 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 ""
+ const char *ZeroDirective; // Defaults to "\t.zero\t"
/// 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"
+ 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"
+ 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"
+ 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;
+ return 0;
}
/// 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.
+ 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.
+ 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"
+ 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
+ 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;
+ 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;
- const char *PICJumpTableDirective;
+ 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.
+ const char *GlobalDirective; // Defaults to NULL.
/// ExternDirective - This is the directive used to declare external
/// globals.
///
- const char *ExternDirective; // Defaults to NULL.
+ 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.
+ 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.
+ /// HasLCOMMDirective - This is true if the target supports the .lcomm
+ /// directive.
+ bool HasLCOMMDirective; // Defaults to false.
- 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.
+ 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.
+ 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.
+ 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.
/// WeakRefDirective - This directive, if non-null, is used to declare a
/// global as being a weak undefined symbol.
- const char *WeakRefDirective; // Defaults to null.
+ 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.
+ const char *WeakDefDirective; // Defaults to NULL.
+
+ /// 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".
+ /// HiddenVisibilityAttr - This attribute, if not MCSA_Invalid, is used to
+ /// declare a symbol as having hidden visibility.
+ MCSymbolAttr HiddenVisibilityAttr; // Defaults to MCSA_Hidden.
- /// 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".
+ /// 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. Defaults to false.
- bool AbsoluteDebugSectionOffsets;
+ /// 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.
+ bool HasLEB128; // Defaults to false.
/// hasDotLocAndDotFile - True if target asm supports .loc and .file
/// directives for emitting debugging information.
- ///
- bool HasDotLocAndDotFile; // Defaults to false.
+ bool HasDotLocAndDotFile; // Defaults to false.
/// SupportsDebugInformation - True if target supports emission of debugging
/// information.
- bool SupportsDebugInformation;
+ bool SupportsDebugInformation; // Defaults to false.
- /// SupportsExceptionHandling - True if target supports
- /// exception handling.
- ///
- // Defaults to None
- ExceptionHandling::ExceptionsType ExceptionsType;
+ /// 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.
+ bool DwarfRequiresFrameSection; // Defaults to true.
/// DwarfUsesInlineInfoSection - True if DwarfDebugInlineSection is used to
/// encode inline subroutine information.
- bool DwarfUsesInlineInfoSection; // Defaults to false.
+ 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.
+ 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.
+ 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.
+ 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
+ const char *const *AsmTransCBE; // Defaults to empty
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);
+ bool hasSubsectionsViaSymbols() const { return HasSubsectionsViaSymbols; }
+
// Data directive accessors.
//
const char *getData8bitsDirective(unsigned AS = 0) const {
return AS == 0 ? Data64bitsDirective : getDataASDirective(64, AS);
}
+ /// 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 {
+ return 0;
+ }
bool usesSunStyleELFSectionSwitchSyntax() const {
return SunStyleELFSectionSwitchSyntax;
// Accessors.
//
- const char *getZeroFillDirective() const {
- return ZeroFillDirective;
- }
- const char *getNonexecutableStackDirective() const {
- return NonexecutableStackDirective;
+ bool hasMachoZeroFillDirective() const { return HasMachoZeroFillDirective; }
+ bool hasStaticCtorDtorReferenceInStaticMode() const {
+ return HasStaticCtorDtorReferenceInStaticMode;
}
bool needsSet() const {
return NeedsSet;
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;
}
bool doesAllowQuotesInName() const {
return AllowQuotesInName;
}
+ bool doesAllowNameToStartWithDigit() const {
+ return AllowNameToStartWithDigit;
+ }
const char *getZeroDirective() const {
return ZeroDirective;
}
- const char *getZeroDirectiveSuffix() const {
- return ZeroDirectiveSuffix;
- }
const char *getAsciiDirective() const {
return AsciiDirective;
}
const char *getSetDirective() const {
return SetDirective;
}
- const char *getLCOMMDirective() const {
- return LCOMMDirective;
- }
- const char *getCOMMDirective() const {
- return COMMDirective;
- }
+ bool hasLCOMMDirective() const { return HasLCOMMDirective; }
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 hasDotTypeDotSizeDirective() const {return HasDotTypeDotSizeDirective;}
+ bool hasSingleParameterDotFile() const { return HasSingleParameterDotFile; }
+ bool hasNoDeadStrip() const { return HasNoDeadStrip; }
+ const char *getWeakRefDirective() const { return WeakRefDirective; }
+ const char *getWeakDefDirective() const { return WeakDefDirective; }
+ const char *getLinkOnceDirective() const { return LinkOnceDirective; }
+
+ MCSymbolAttr getHiddenVisibilityAttr() const { return HiddenVisibilityAttr;}
+ MCSymbolAttr getProtectedVisibilityAttr() const {
+ return ProtectedVisibilityAttr;
}
bool isAbsoluteDebugSectionOffsets() const {
return AbsoluteDebugSectionOffsets;
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