mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 04:30:12 +00:00
90a5a0cd7c
better name and matches what is used in the MachO writer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122443 91177308-0d34-0410-b5e6-96231b3b80d8
463 lines
19 KiB
C++
463 lines
19 KiB
C++
//===-- llvm/MC/MCAsmInfo.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/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 }; }
|
|
|
|
class MCAsmInfo {
|
|
protected:
|
|
//===------------------------------------------------------------------===//
|
|
// Properties to be set by the target writer, used to configure asm printer.
|
|
//
|
|
|
|
/// HasSubsectionsViaSymbols - True if this target has the MachO
|
|
/// .subsections_via_symbols directive.
|
|
bool HasSubsectionsViaSymbols; // Default is false.
|
|
|
|
/// HasMachoZeroFillDirective - True if this is a MachO target that supports
|
|
/// the macho-specific .zerofill directive for emitting BSS Symbols.
|
|
bool HasMachoZeroFillDirective; // Default is false.
|
|
|
|
/// HasMachoTBSSDirective - True if this is a MachO target that supports
|
|
/// the macho-specific .tbss directive for emitting thread local BSS Symbols
|
|
bool HasMachoTBSSDirective; // Default is false.
|
|
|
|
/// HasStaticCtorDtorReferenceInStaticMode - True if the compiler should
|
|
/// emit a ".reference .constructors_used" or ".reference .destructors_used"
|
|
/// directive after the a static ctor/dtor list. This directive is only
|
|
/// emitted in Static relocation model.
|
|
bool HasStaticCtorDtorReferenceInStaticMode; // Default is false.
|
|
|
|
/// LinkerRequiresNonEmptyDwarfLines - True if the linker has a bug and
|
|
/// requires that the debug_line section be of a minimum size. In practice
|
|
/// such a linker requires a non empty line sequence if a file is present.
|
|
bool LinkerRequiresNonEmptyDwarfLines; // Default to false.
|
|
|
|
/// MaxInstLength - This is the maximum possible length of an instruction,
|
|
/// which is needed to compute the size of an inline asm.
|
|
unsigned MaxInstLength; // Defaults to 4.
|
|
|
|
/// PCSymbol - The symbol used to represent the current PC. Used in PC
|
|
/// relative expressions.
|
|
const char *PCSymbol; // Defaults to "$".
|
|
|
|
/// SeparatorChar - This character, if specified, is used to separate
|
|
/// instructions from each other when on the same line. This is used to
|
|
/// measure inline asm instructions.
|
|
char SeparatorChar; // Defaults to ';'
|
|
|
|
/// CommentColumn - This indicates the comment num (zero-based) at
|
|
/// which asm comments should be printed.
|
|
unsigned CommentColumn; // Defaults to 40
|
|
|
|
/// CommentString - This indicates the comment character used by the
|
|
/// assembler.
|
|
const char *CommentString; // Defaults to "#"
|
|
|
|
/// LabelSuffix - This is appended to emitted labels.
|
|
const char *LabelSuffix; // Defaults to ":"
|
|
|
|
/// GlobalPrefix - If this is set to a non-empty string, it is prepended
|
|
/// onto all global symbols. This is often used for "_" or ".".
|
|
const char *GlobalPrefix; // Defaults to ""
|
|
|
|
/// 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 ""
|
|
|
|
/// 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;
|
|
|
|
/// AllowNameToStartWithDigit - This is true if the assembler allows symbol
|
|
/// names to start with a digit (e.g., "0x0021"). This defaults to false.
|
|
bool AllowNameToStartWithDigit;
|
|
|
|
/// AllowPeriodsInName - This is true if the assembler allows periods in
|
|
/// symbol names. This defaults to true.
|
|
bool AllowPeriodsInName;
|
|
|
|
//===--- 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"
|
|
|
|
/// 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"
|
|
|
|
/// 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 {
|
|
assert(AS != 0 && "Don't know the directives for default addr space");
|
|
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.
|
|
|
|
/// 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.
|
|
|
|
/// 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
|
|
/// 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; // Defaults to 0
|
|
|
|
//===--- 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.
|
|
|
|
/// HasSetDirective - True if the assembler supports the .set directive.
|
|
bool HasSetDirective; // Defaults to true.
|
|
|
|
/// HasAggressiveSymbolFolding - False if the assembler requires that we use
|
|
/// Lc = a - b
|
|
/// .long Lc
|
|
/// instead of
|
|
/// .long a - b
|
|
bool HasAggressiveSymbolFolding; // Defaults to true.
|
|
|
|
/// HasLCOMMDirective - This is true if the target supports the .lcomm
|
|
/// directive.
|
|
bool HasLCOMMDirective; // Defaults to false.
|
|
|
|
/// 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.
|
|
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.
|
|
|
|
/// HasNoDeadStrip - True if this target supports the MachO .no_dead_strip
|
|
/// directive.
|
|
bool HasNoDeadStrip; // Defaults to false.
|
|
|
|
/// HasSymbolResolver - True if this target supports the MachO
|
|
/// .symbol_resolver directive.
|
|
bool HasSymbolResolver; // Defaults to false.
|
|
|
|
/// WeakRefDirective - This directive, if non-null, is used to declare a
|
|
/// global as being a weak undefined symbol.
|
|
const char *WeakRefDirective; // Defaults to NULL.
|
|
|
|
/// WeakDefDirective - This directive, if non-null, is used to declare a
|
|
/// global as being a weak defined symbol.
|
|
const char *WeakDefDirective; // Defaults to NULL.
|
|
|
|
/// 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.
|
|
|
|
/// HiddenVisibilityAttr - This attribute, if not MCSA_Invalid, is used to
|
|
/// declare a symbol as having hidden visibility.
|
|
MCSymbolAttr HiddenVisibilityAttr; // Defaults to MCSA_Hidden.
|
|
|
|
/// ProtectedVisibilityAttr - This attribute, if not MCSA_Invalid, is used
|
|
/// to declare a symbol as having protected visibility.
|
|
MCSymbolAttr ProtectedVisibilityAttr; // Defaults to MCSA_Protected
|
|
|
|
//===--- Dwarf Emission Directives -----------------------------------===//
|
|
|
|
/// HasLEB128 - True if target asm supports leb128 directives.
|
|
bool HasLEB128; // Defaults to false.
|
|
|
|
/// SupportsDebugInformation - True if target supports emission of debugging
|
|
/// information.
|
|
bool SupportsDebugInformation; // Defaults to false.
|
|
|
|
/// SupportsExceptionHandling - True if target supports exception handling.
|
|
ExceptionHandling::ExceptionsType ExceptionsType; // Defaults to None
|
|
|
|
/// RequiresFrameSection - true if the Dwarf2 output needs a frame section
|
|
bool DwarfRequiresFrameSection; // Defaults to true.
|
|
|
|
/// DwarfUsesInlineInfoSection - True if DwarfDebugInlineSection is used to
|
|
/// encode inline subroutine information.
|
|
bool DwarfUsesInlineInfoSection; // Defaults to false.
|
|
|
|
/// DwarfSectionOffsetDirective - Special section offset directive.
|
|
const char* DwarfSectionOffsetDirective; // Defaults to NULL
|
|
|
|
/// DwarfUsesAbsoluteLabelForStmtList - True if DW_AT_stmt_list needs
|
|
/// absolute label instead of offset.
|
|
bool DwarfUsesAbsoluteLabelForStmtList; // Defaults to true;
|
|
|
|
// DwarfUsesLabelOffsetDifference - True if Dwarf2 output can
|
|
// use EmitLabelOffsetDifference.
|
|
bool DwarfUsesLabelOffsetForRanges;
|
|
|
|
//===--- CBE Asm Translation Table -----------------------------------===//
|
|
|
|
const char *const *AsmTransCBE; // Defaults to empty
|
|
|
|
public:
|
|
explicit MCAsmInfo();
|
|
virtual ~MCAsmInfo();
|
|
|
|
// FIXME: move these methods to DwarfPrinter when the JIT stops using them.
|
|
static unsigned getSLEB128Size(int Value);
|
|
static unsigned getULEB128Size(unsigned Value);
|
|
|
|
bool hasSubsectionsViaSymbols() const { return HasSubsectionsViaSymbols; }
|
|
|
|
// 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);
|
|
}
|
|
const char *getGPRel32Directive() const { return GPRel32Directive; }
|
|
|
|
/// getNonexecutableStackSection - Targets can implement this method to
|
|
/// specify a section to switch to if the translation unit doesn't have any
|
|
/// trampolines that require an executable stack.
|
|
virtual const MCSection *getNonexecutableStackSection(MCContext &Ctx) const{
|
|
return 0;
|
|
}
|
|
|
|
bool usesSunStyleELFSectionSwitchSyntax() const {
|
|
return SunStyleELFSectionSwitchSyntax;
|
|
}
|
|
|
|
bool usesELFSectionDirectiveForBSS() const {
|
|
return UsesELFSectionDirectiveForBSS;
|
|
}
|
|
|
|
bool hasMicrosoftFastStdCallMangling() const {
|
|
return HasMicrosoftFastStdCallMangling;
|
|
}
|
|
|
|
// Accessors.
|
|
//
|
|
bool hasMachoZeroFillDirective() const { return HasMachoZeroFillDirective; }
|
|
bool hasMachoTBSSDirective() const { return HasMachoTBSSDirective; }
|
|
bool hasStaticCtorDtorReferenceInStaticMode() const {
|
|
return HasStaticCtorDtorReferenceInStaticMode;
|
|
}
|
|
bool getLinkerRequiresNonEmptyDwarfLines() const {
|
|
return LinkerRequiresNonEmptyDwarfLines;
|
|
}
|
|
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 *getLabelSuffix() const {
|
|
return LabelSuffix;
|
|
}
|
|
const char *getGlobalPrefix() const {
|
|
return GlobalPrefix;
|
|
}
|
|
const char *getPrivateGlobalPrefix() const {
|
|
return PrivateGlobalPrefix;
|
|
}
|
|
const char *getLinkerPrivateGlobalPrefix() const {
|
|
return LinkerPrivateGlobalPrefix;
|
|
}
|
|
const char *getInlineAsmStart() const {
|
|
return InlineAsmStart;
|
|
}
|
|
const char *getInlineAsmEnd() const {
|
|
return InlineAsmEnd;
|
|
}
|
|
unsigned getAssemblerDialect() const {
|
|
return AssemblerDialect;
|
|
}
|
|
bool doesAllowQuotesInName() const {
|
|
return AllowQuotesInName;
|
|
}
|
|
bool doesAllowNameToStartWithDigit() const {
|
|
return AllowNameToStartWithDigit;
|
|
}
|
|
bool doesAllowPeriodsInName() const {
|
|
return AllowPeriodsInName;
|
|
}
|
|
const char *getZeroDirective() const {
|
|
return ZeroDirective;
|
|
}
|
|
const char *getAsciiDirective() const {
|
|
return AsciiDirective;
|
|
}
|
|
const char *getAscizDirective() const {
|
|
return AscizDirective;
|
|
}
|
|
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;
|
|
}
|
|
bool hasSetDirective() const { return HasSetDirective; }
|
|
bool hasAggressiveSymbolFolding() const {
|
|
return HasAggressiveSymbolFolding;
|
|
}
|
|
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; }
|
|
bool hasSymbolResolver() const { return HasSymbolResolver; }
|
|
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 hasLEB128() const {
|
|
return HasLEB128;
|
|
}
|
|
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;
|
|
}
|
|
const char *getDwarfSectionOffsetDirective() const {
|
|
return DwarfSectionOffsetDirective;
|
|
}
|
|
bool doesDwarfUsesAbsoluteLabelForStmtList() const {
|
|
return DwarfUsesAbsoluteLabelForStmtList;
|
|
}
|
|
bool doesDwarfUsesLabelOffsetForRanges() const {
|
|
return DwarfUsesLabelOffsetForRanges;
|
|
}
|
|
const char *const *getAsmCBE() const {
|
|
return AsmTransCBE;
|
|
}
|
|
};
|
|
}
|
|
|
|
#endif
|