#ifndef LLVM_TARGET_ASM_INFO_H
#define LLVM_TARGET_ASM_INFO_H
+#include "llvm/MC/MCDirectives.h"
#include <cassert>
namespace llvm {
+ 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.
namespace ExceptionHandling { enum ExceptionsType { None, Dwarf, SjLj }; }
// 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.
+ /// 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.
/// MaxInstLength - This is the maximum possible length of an instruction,
/// which is needed to compute the size of an inline asm.
/// 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.
/// 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 -------------------------------------===//
/// "\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 *Data32bitsDirective; // Defaults to "\t.long\t"
const char *Data64bitsDirective; // Defaults to "\t.quad\t"
+ /// GPRel32Directive - if non-null, a directive that is used to emit a word
+ /// which should be relocated as a 32-bit GP-relative offset, e.g. .gpword
+ /// on Mips or .gprel32 on Alpha.
+ const char *GPRel32Directive; // Defaults to NULL.
+
/// getDataASDirective - Return the directive that should be used to emit
/// data of the specified size to the specified numeric address space.
virtual const char *getDataASDirective(unsigned Size, unsigned AS) const {
/// 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
/// 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 *ExternDirective; // Defaults to NULL.
- /// SetDirective - This is the name of a directive that can be used to tell
- /// the assembler to set the value of a variable to some expression.
- const char *SetDirective; // Defaults to null.
+ /// HasSetDirective - True if the assembler supports the .set directive.
+ bool HasSetDirective; // Defaults to true.
- /// 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.
+ /// COMMDirectiveAlignmentIsInBytes - True is COMMDirective's optional
+ /// alignment is to be specified in bytes instead of log2(n).
+ bool COMMDirectiveAlignmentIsInBytes; // Defaults to true;
/// HasDotTypeDotSizeDirective - True if the target has .type and .size
/// directives, this is true for most ELF targets.
/// .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.
/// WeakRefDirective - This directive, if non-null, is used to declare a
/// global as being a weak undefined symbol.
/// WeakDefDirective - This directive, if non-null, is used to declare a
/// global as being a weak defined symbol.
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 -----------------------------------===//
/// 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
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 {
const char *getData64bitsDirective(unsigned AS = 0) const {
return AS == 0 ? Data64bitsDirective : getDataASDirective(64, AS);
}
+ const char *getGPRel32Directive() const { return GPRel32Directive; }
+ /// getNonexecutableStackSection - Targets can implement this method to
+ /// specify a section to switch to if the translation unit doesn't have any
+ /// trampolines that require an executable stack.
+ virtual MCSection *getNonexecutableStackSection(MCContext &Ctx) const {
+ return 0;
+ }
bool usesSunStyleELFSectionSwitchSyntax() const {
return SunStyleELFSectionSwitchSyntax;
return UsesELFSectionDirectiveForBSS;
}
+ bool hasMicrosoftFastStdCallMangling() const {
+ return HasMicrosoftFastStdCallMangling;
+ }
+
// Accessors.
//
- const char *getZeroFillDirective() const {
- return ZeroFillDirective;
- }
- const char *getNonexecutableStackDirective() const {
- return NonexecutableStackDirective;
- }
- bool needsSet() const {
- return NeedsSet;
+ bool hasMachoZeroFillDirective() const { return HasMachoZeroFillDirective; }
+ bool hasStaticCtorDtorReferenceInStaticMode() const {
+ return HasStaticCtorDtorReferenceInStaticMode;
}
unsigned getMaxInstLength() const {
return MaxInstLength;
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 *getAscizDirective() const {
return AscizDirective;
}
- const char *getJumpTableDirective(bool isPIC) const {
- return isPIC ? PICJumpTableDirective : JumpTableDirective;
- }
const char *getAlignDirective() const {
return AlignDirective;
}
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 hasSetDirective() const { return HasSetDirective; }
+ bool hasLCOMMDirective() const { return HasLCOMMDirective; }
+ bool hasDotTypeDotSizeDirective() const {return HasDotTypeDotSizeDirective;}
+ bool getCOMMDirectiveAlignmentIsInBytes() const {
+ return COMMDirectiveAlignmentIsInBytes;
+ }
+ bool hasSingleParameterDotFile() const { return HasSingleParameterDotFile; }
+ bool hasNoDeadStrip() const { return HasNoDeadStrip; }
+ 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;
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;
}
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