mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-29 11:29:39 +00:00
5d4918dbd1
foo = a - b .long foo instead of just .long a - b First, on darwin9 64 bits the assembler produces the wrong result. Second, if "a" is the end of the section all darwin assemblers (9, 10 and mc) will not consider a - b to be a constant but will if the dummy foo is created. Split how we handle these cases. The first one is something MC should take care of. The second one has to be handled by the caller. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120889 91177308-0d34-0410-b5e6-96231b3b80d8
461 lines
19 KiB
C++
461 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.
|
|
|
|
/// NeedsSetToChangeDiffSize - True if the assembler requires that we do
|
|
/// Lc = a - b
|
|
/// .long Lc
|
|
/// instead of doing
|
|
/// .long a - b
|
|
bool NeedsSetToChangeDiffSize; // Defaults to false.
|
|
|
|
/// 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 needsSetToChangeDiffSize() const { return NeedsSetToChangeDiffSize; }
|
|
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
|