1 //===-- llvm/Target/TargetAsmInfo.h - Asm info ------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains a class to be used as the basis for target specific
11 // asm writers. This class primarily takes care of global printing constants,
12 // which are used in very similar ways across all targets.
14 //===----------------------------------------------------------------------===//
16 #ifndef LLVM_TARGET_ASM_INFO_H
17 #define LLVM_TARGET_ASM_INFO_H
19 #include "llvm/ADT/DenseMap.h"
20 #include "llvm/ADT/StringMap.h"
21 #include "llvm/Support/DataTypes.h"
25 // DWARF encoding query type
26 namespace DwarfEncoding {
34 /// SectionKind - This is a simple POD value that classifies the properties of
35 /// a section. A global variable is classified into the deepest possible
36 /// classification, and then the target maps them onto their sections based on
37 /// what capabilities they have.
39 /// The comments below describe these as if they were an inheritance hierarchy
40 /// in order to explain the predicates below.
43 /// Text - Text section, used for functions and other executable code.
46 /// ReadOnly - Data that is never written to at program runtime by the
47 /// program or the dynamic linker. Things in the top-level readonly
48 /// SectionKind are not mergeable.
51 /// MergeableCString - This is a special section for nul-terminated
52 /// strings. The linker can unique the C strings, knowing their
53 /// semantics. Because it uniques based on the nul terminators, the
54 /// compiler can't put strings in this section that have embeded nuls
58 /// MergeableConst - These are sections for merging fixed-length
59 /// constants together. For example, this can be used to unique
60 /// constant pool entries etc.
63 /// MergeableConst4 - This is a section used by 4-byte constants,
64 /// for example, floats.
67 /// MergeableConst8 - This is a section used by 8-byte constants,
68 /// for example, doubles.
71 /// MergeableConst16 - This is a section used by 16-byte constants,
72 /// for example, vectors.
75 /// Writeable - This is the base of all segments that need to be written
76 /// to during program runtime.
78 /// ThreadLocal - This is the base of all TLS segments. All TLS
79 /// objects must be writeable, otherwise there is no reason for them to
82 /// ThreadBSS - Zero-initialized TLS data objects.
85 /// ThreadData - Initialized TLS data objects.
88 /// GlobalWriteableData - Writeable data that is global (not thread
91 /// BSS - Zero initialized writeable data.
94 /// DataRel - This is the most general form of data that is written
95 /// to by the program, it can have random relocations to arbitrary
99 /// DataRelLocal - This is writeable data that has a non-zero
100 /// initializer and has relocations in it, but all of the
101 /// relocations are known to be within the final linked image
102 /// the global is linked into.
105 /// DataNoRel - This is writeable data that has a non-zero
106 /// initializer, but whose initializer is known to have no
110 /// ReadOnlyWithRel - These are global variables that are never
111 /// written to by the program, but that have relocations, so they
112 /// must be stuck in a writeable section so that the dynamic linker
113 /// can write to them. If it chooses to, the dynamic linker can
114 /// mark the pages these globals end up on as read-only after it is
115 /// done with its relocation phase.
118 /// ReadOnlyWithRelLocal - This is data that is readonly by the
119 /// program, but must be writeable so that the dynamic linker
120 /// can perform relocations in it. This is used when we know
121 /// that all the relocations are to globals in this final
132 bool isText() const {
136 bool isReadOnly() const {
137 return K == ReadOnly || K == MergeableCString || isMergeableConst();
140 bool isMergeableCString() const { return K == MergeableCString; }
141 bool isMergeableConst() const {
142 return K == MergeableConst || K == MergeableConst4 ||
143 K == MergeableConst8 || K == MergeableConst16;
146 bool isMergeableConst4() const { return K == MergeableConst4; }
147 bool isMergeableConst8() const { return K == MergeableConst8; }
148 bool isMergeableConst16() const { return K == MergeableConst16; }
150 bool isWriteable() const {
151 return isThreadLocal() || isGlobalWriteableData();
154 bool isThreadLocal() const {
155 return K == ThreadData || K == ThreadBSS;
158 bool isThreadBSS() const { return K == ThreadBSS; }
159 bool isThreadData() const { return K == ThreadData; }
161 bool isGlobalWriteableData() const {
162 return isBSS() || isDataRel() || isReadOnlyWithRel();
165 bool isBSS() const { return K == BSS; }
167 bool isDataRel() const {
168 return K == DataRel || K == DataRelLocal || K == DataNoRel;
171 bool isDataRelLocal() const {
172 return K == DataRelLocal || K == DataNoRel;
175 bool isDataNoRel() const { return K == DataNoRel; }
177 bool isReadOnlyWithRel() const {
178 return K == ReadOnlyWithRel || K == ReadOnlyWithRelLocal;
181 bool isReadOnlyWithRelLocal() const {
182 return K == ReadOnlyWithRelLocal;
185 static SectionKind get(Kind K) {
192 namespace SectionFlags {
193 const unsigned Invalid = -1U;
194 const unsigned None = 0;
195 const unsigned Code = 1 << 0; ///< Section contains code
196 const unsigned Writable = 1 << 1; ///< Section is writeable
197 const unsigned BSS = 1 << 2; ///< Section contains only zeroes
198 const unsigned Mergeable = 1 << 3; ///< Section contains mergeable data
199 const unsigned Strings = 1 << 4; ///< Section contains C-type strings
200 const unsigned TLS = 1 << 5; ///< Section contains thread-local data
201 const unsigned Debug = 1 << 6; ///< Section contains debug data
202 const unsigned Linkonce = 1 << 7; ///< Section is linkonce
203 const unsigned TypeFlags = 0xFF;
204 // Some gap for future flags
206 /// Named - True if this section should be printed with ".section <name>",
207 /// false if the section name is something like ".const".
208 const unsigned Named = 1 << 23; ///< Section is named
209 const unsigned EntitySize = 0xFF << 24; ///< Entity size for mergeable stuff
211 static inline unsigned getEntitySize(unsigned Flags) {
212 return (Flags >> 24) & 0xFF;
215 // FIXME: Why does this return a value?
216 static inline unsigned setEntitySize(unsigned Flags, unsigned Size) {
217 return (Flags & ~EntitySize) | ((Size & 0xFF) << 24);
221 static inline unsigned getEmptyKey() { return Invalid; }
222 static inline unsigned getTombstoneKey() { return Invalid - 1; }
223 static unsigned getHashValue(const unsigned &Key) { return Key; }
224 static bool isEqual(unsigned LHS, unsigned RHS) { return LHS == RHS; }
225 static bool isPod() { return true; }
228 typedef DenseMap<unsigned, std::string, KeyInfo> FlagsStringsMapType;
238 friend class TargetAsmInfo;
239 friend class StringMapEntry<Section>;
240 friend class StringMap<Section>;
244 explicit Section(unsigned F = SectionFlags::Invalid) : Flags(F) { }
248 unsigned getEntitySize() const { return (Flags >> 24) & 0xFF; }
250 const std::string &getName() const { return Name; }
251 unsigned getFlags() const { return Flags; }
253 bool hasFlag(unsigned F) const { return (Flags & F) != 0; }
256 /// TargetAsmInfo - This class is intended to be used as a base class for asm
257 /// properties and features specific to the target.
258 class TargetAsmInfo {
260 mutable StringMap<Section> Sections;
261 mutable SectionFlags::FlagsStringsMapType FlagsStrings;
263 /// TM - The current TargetMachine.
264 const TargetMachine &TM;
266 //===------------------------------------------------------------------===//
267 // Properties to be set by the target writer, used to configure asm printer.
270 /// TextSection - Section directive for standard text.
272 const Section *TextSection; // Defaults to ".text".
274 /// DataSection - Section directive for standard data.
276 const Section *DataSection; // Defaults to ".data".
278 /// BSSSection - Section directive for uninitialized data. Null if this
279 /// target doesn't support a BSS section.
281 const char *BSSSection; // Default to ".bss".
282 const Section *BSSSection_;
284 /// ReadOnlySection - This is the directive that is emitted to switch to a
285 /// read-only section for constant data (e.g. data declared const,
287 const Section *ReadOnlySection; // Defaults to NULL
289 /// TLSDataSection - Section directive for Thread Local data.
291 const Section *TLSDataSection; // Defaults to ".tdata".
293 /// TLSBSSSection - Section directive for Thread Local uninitialized data.
294 /// Null if this target doesn't support a BSS section.
296 const Section *TLSBSSSection; // Defaults to ".tbss".
298 /// ZeroFillDirective - Directive for emitting a global to the ZeroFill
299 /// section on this target. Null if this target doesn't support zerofill.
300 const char *ZeroFillDirective; // Default is null.
302 /// NonexecutableStackDirective - Directive for declaring to the
303 /// linker and beyond that the emitted code does not require stack
304 /// memory to be executable.
305 const char *NonexecutableStackDirective; // Default is null.
307 /// NeedsSet - True if target asm treats expressions in data directives
308 /// as linktime-relocatable. For assembly-time computation, we need to
309 /// use a .set. Thus:
312 /// is computed at assembly time, while
314 /// is relocated if the relative locations of x and y change at linktime.
315 /// We want both these things in different places.
316 bool NeedsSet; // Defaults to false.
318 /// MaxInstLength - This is the maximum possible length of an instruction,
319 /// which is needed to compute the size of an inline asm.
320 unsigned MaxInstLength; // Defaults to 4.
322 /// PCSymbol - The symbol used to represent the current PC. Used in PC
323 /// relative expressions.
324 const char *PCSymbol; // Defaults to "$".
326 /// SeparatorChar - This character, if specified, is used to separate
327 /// instructions from each other when on the same line. This is used to
328 /// measure inline asm instructions.
329 char SeparatorChar; // Defaults to ';'
331 /// CommentColumn - This indicates the comment num (zero-based) at
332 /// which asm comments should be printed.
333 unsigned CommentColumn; // Defaults to 60
335 /// CommentString - This indicates the comment character used by the
337 const char *CommentString; // Defaults to "#"
339 /// FirstOperandColumn - The output column where the first operand
340 /// should be printed
341 unsigned FirstOperandColumn; // Defaults to 0 (ignored)
343 /// MaxOperandLength - The maximum length of any printed asm
345 unsigned MaxOperandLength; // Defaults to 0 (ignored)
347 /// GlobalPrefix - If this is set to a non-empty string, it is prepended
348 /// onto all global symbols. This is often used for "_" or ".".
349 const char *GlobalPrefix; // Defaults to ""
351 /// PrivateGlobalPrefix - This prefix is used for globals like constant
352 /// pool entries that are completely private to the .s file and should not
353 /// have names in the .o file. This is often "." or "L".
354 const char *PrivateGlobalPrefix; // Defaults to "."
356 /// LinkerPrivateGlobalPrefix - This prefix is used for symbols that should
357 /// be passed through the assembler but be removed by the linker. This
358 /// is "l" on Darwin, currently used for some ObjC metadata.
359 const char *LinkerPrivateGlobalPrefix; // Defaults to ""
361 /// JumpTableSpecialLabelPrefix - If not null, a extra (dead) label is
362 /// emitted before jump tables with the specified prefix.
363 const char *JumpTableSpecialLabelPrefix; // Default to null.
365 /// GlobalVarAddrPrefix/Suffix - If these are nonempty, these strings
366 /// will enclose any GlobalVariable (that isn't a function)
368 const char *GlobalVarAddrPrefix; // Defaults to ""
369 const char *GlobalVarAddrSuffix; // Defaults to ""
371 /// FunctionAddrPrefix/Suffix - If these are nonempty, these strings
372 /// will enclose any GlobalVariable that points to a function.
374 const char *FunctionAddrPrefix; // Defaults to ""
375 const char *FunctionAddrSuffix; // Defaults to ""
377 /// PersonalityPrefix/Suffix - If these are nonempty, these strings will
378 /// enclose any personality function in the common frame section.
380 const char *PersonalityPrefix; // Defaults to ""
381 const char *PersonalitySuffix; // Defaults to ""
383 /// NeedsIndirectEncoding - If set, we need to set the indirect encoding bit
386 bool NeedsIndirectEncoding; // Defaults to false
388 /// InlineAsmStart/End - If these are nonempty, they contain a directive to
389 /// emit before and after an inline assembly statement.
390 const char *InlineAsmStart; // Defaults to "#APP\n"
391 const char *InlineAsmEnd; // Defaults to "#NO_APP\n"
393 /// AssemblerDialect - Which dialect of an assembler variant to use.
394 unsigned AssemblerDialect; // Defaults to 0
396 /// AllowQuotesInName - This is true if the assembler allows for complex
397 /// symbol names to be surrounded in quotes. This defaults to false.
398 bool AllowQuotesInName;
400 //===--- Data Emission Directives -------------------------------------===//
402 /// ZeroDirective - this should be set to the directive used to get some
403 /// number of zero bytes emitted to the current section. Common cases are
404 /// "\t.zero\t" and "\t.space\t". If this is set to null, the
405 /// Data*bitsDirective's will be used to emit zero bytes.
406 const char *ZeroDirective; // Defaults to "\t.zero\t"
407 const char *ZeroDirectiveSuffix; // Defaults to ""
409 /// AsciiDirective - This directive allows emission of an ascii string with
410 /// the standard C escape characters embedded into it.
411 const char *AsciiDirective; // Defaults to "\t.ascii\t"
413 /// AscizDirective - If not null, this allows for special handling of
414 /// zero terminated strings on this target. This is commonly supported as
415 /// ".asciz". If a target doesn't support this, it can be set to null.
416 const char *AscizDirective; // Defaults to "\t.asciz\t"
418 /// DataDirectives - These directives are used to output some unit of
419 /// integer data to the current section. If a data directive is set to
420 /// null, smaller data directives will be used to emit the large sizes.
421 const char *Data8bitsDirective; // Defaults to "\t.byte\t"
422 const char *Data16bitsDirective; // Defaults to "\t.short\t"
423 const char *Data32bitsDirective; // Defaults to "\t.long\t"
424 const char *Data64bitsDirective; // Defaults to "\t.quad\t"
426 /// getDataASDirective - Return the directive that should be used to emit
427 /// data of the specified size to the specified numeric address space.
428 virtual const char *getDataASDirective(unsigned Size, unsigned AS) const {
429 assert(AS != 0 && "Don't know the directives for default addr space");
433 //===--- Alignment Information ----------------------------------------===//
435 /// AlignDirective - The directive used to emit round up to an alignment
438 const char *AlignDirective; // Defaults to "\t.align\t"
440 /// AlignmentIsInBytes - If this is true (the default) then the asmprinter
441 /// emits ".align N" directives, where N is the number of bytes to align to.
442 /// Otherwise, it emits ".align log2(N)", e.g. 3 to align to an 8 byte
444 bool AlignmentIsInBytes; // Defaults to true
446 /// TextAlignFillValue - If non-zero, this is used to fill the executable
447 /// space created as the result of a alignment directive.
448 unsigned TextAlignFillValue;
450 //===--- Section Switching Directives ---------------------------------===//
452 /// SwitchToSectionDirective - This is the directive used when we want to
453 /// emit a global to an arbitrary section. The section name is emited after
455 const char *SwitchToSectionDirective; // Defaults to "\t.section\t"
457 /// TextSectionStartSuffix - This is printed after each start of section
458 /// directive for text sections.
459 const char *TextSectionStartSuffix; // Defaults to "".
461 /// DataSectionStartSuffix - This is printed after each start of section
462 /// directive for data sections.
463 const char *DataSectionStartSuffix; // Defaults to "".
465 /// SectionEndDirectiveSuffix - If non-null, the asm printer will close each
466 /// section with the section name and this suffix printed.
467 const char *SectionEndDirectiveSuffix;// Defaults to null.
469 /// ConstantPoolSection - This is the section that we SwitchToSection right
470 /// before emitting the constant pool for a function.
471 const char *ConstantPoolSection; // Defaults to "\t.section .rodata"
473 /// JumpTableDataSection - This is the section that we SwitchToSection right
474 /// before emitting the jump tables for a function when the relocation model
476 const char *JumpTableDataSection; // Defaults to "\t.section .rodata"
478 /// JumpTableDirective - if non-null, the directive to emit before a jump
480 const char *JumpTableDirective;
482 /// CStringSection - If not null, this allows for special handling of
483 /// cstring constants (null terminated string that does not contain any
484 /// other null bytes) on this target. This is commonly supported as
486 const char *CStringSection; // Defaults to NULL
487 const Section *CStringSection_;
489 /// StaticCtorsSection - This is the directive that is emitted to switch to
490 /// a section to emit the static constructor list.
491 /// Defaults to "\t.section .ctors,\"aw\",@progbits".
492 const char *StaticCtorsSection;
494 /// StaticDtorsSection - This is the directive that is emitted to switch to
495 /// a section to emit the static destructor list.
496 /// Defaults to "\t.section .dtors,\"aw\",@progbits".
497 const char *StaticDtorsSection;
499 //===--- Global Variable Emission Directives --------------------------===//
501 /// GlobalDirective - This is the directive used to declare a global entity.
503 const char *GlobalDirective; // Defaults to NULL.
505 /// ExternDirective - This is the directive used to declare external
508 const char *ExternDirective; // Defaults to NULL.
510 /// SetDirective - This is the name of a directive that can be used to tell
511 /// the assembler to set the value of a variable to some expression.
512 const char *SetDirective; // Defaults to null.
514 /// LCOMMDirective - This is the name of a directive (if supported) that can
515 /// be used to efficiently declare a local (internal) block of zero
516 /// initialized data in the .bss/.data section. The syntax expected is:
517 /// @verbatim <LCOMMDirective> SYMBOLNAME LENGTHINBYTES, ALIGNMENT
519 const char *LCOMMDirective; // Defaults to null.
521 const char *COMMDirective; // Defaults to "\t.comm\t".
523 /// COMMDirectiveTakesAlignment - True if COMMDirective take a third
524 /// argument that specifies the alignment of the declaration.
525 bool COMMDirectiveTakesAlignment; // Defaults to true.
527 /// HasDotTypeDotSizeDirective - True if the target has .type and .size
528 /// directives, this is true for most ELF targets.
529 bool HasDotTypeDotSizeDirective; // Defaults to true.
531 /// HasSingleParameterDotFile - True if the target has a single parameter
532 /// .file directive, this is true for ELF targets.
533 bool HasSingleParameterDotFile; // Defaults to true.
535 /// UsedDirective - This directive, if non-null, is used to declare a global
536 /// as being used somehow that the assembler can't see. This prevents dead
537 /// code elimination on some targets.
538 const char *UsedDirective; // Defaults to null.
540 /// WeakRefDirective - This directive, if non-null, is used to declare a
541 /// global as being a weak undefined symbol.
542 const char *WeakRefDirective; // Defaults to null.
544 /// WeakDefDirective - This directive, if non-null, is used to declare a
545 /// global as being a weak defined symbol.
546 const char *WeakDefDirective; // Defaults to null.
548 /// HiddenDirective - This directive, if non-null, is used to declare a
549 /// global or function as having hidden visibility.
550 const char *HiddenDirective; // Defaults to "\t.hidden\t".
552 /// ProtectedDirective - This directive, if non-null, is used to declare a
553 /// global or function as having protected visibility.
554 const char *ProtectedDirective; // Defaults to "\t.protected\t".
556 //===--- Dwarf Emission Directives -----------------------------------===//
558 /// AbsoluteDebugSectionOffsets - True if we should emit abolute section
559 /// offsets for debug information. Defaults to false.
560 bool AbsoluteDebugSectionOffsets;
562 /// AbsoluteEHSectionOffsets - True if we should emit abolute section
563 /// offsets for EH information. Defaults to false.
564 bool AbsoluteEHSectionOffsets;
566 /// HasLEB128 - True if target asm supports leb128 directives.
568 bool HasLEB128; // Defaults to false.
570 /// hasDotLocAndDotFile - True if target asm supports .loc and .file
571 /// directives for emitting debugging information.
573 bool HasDotLocAndDotFile; // Defaults to false.
575 /// SupportsDebugInformation - True if target supports emission of debugging
577 bool SupportsDebugInformation;
579 /// SupportsExceptionHandling - True if target supports
580 /// exception handling.
582 bool SupportsExceptionHandling; // Defaults to false.
584 /// RequiresFrameSection - true if the Dwarf2 output needs a frame section
586 bool DwarfRequiresFrameSection; // Defaults to true.
588 /// DwarfUsesInlineInfoSection - True if DwarfDebugInlineSection is used to
589 /// encode inline subroutine information.
590 bool DwarfUsesInlineInfoSection; // Defaults to false.
592 /// Is_EHSymbolPrivate - If set, the "_foo.eh" is made private so that it
593 /// doesn't show up in the symbol table of the object file.
594 bool Is_EHSymbolPrivate; // Defaults to true.
596 /// GlobalEHDirective - This is the directive used to make exception frame
597 /// tables globally visible.
599 const char *GlobalEHDirective; // Defaults to NULL.
601 /// SupportsWeakEmptyEHFrame - True if target assembler and linker will
602 /// handle a weak_definition of constant 0 for an omitted EH frame.
603 bool SupportsWeakOmittedEHFrame; // Defaults to true.
605 /// DwarfSectionOffsetDirective - Special section offset directive.
606 const char* DwarfSectionOffsetDirective; // Defaults to NULL
608 /// DwarfAbbrevSection - Section directive for Dwarf abbrev.
610 const char *DwarfAbbrevSection; // Defaults to ".debug_abbrev".
612 /// DwarfInfoSection - Section directive for Dwarf info.
614 const char *DwarfInfoSection; // Defaults to ".debug_info".
616 /// DwarfLineSection - Section directive for Dwarf info.
618 const char *DwarfLineSection; // Defaults to ".debug_line".
620 /// DwarfFrameSection - Section directive for Dwarf info.
622 const char *DwarfFrameSection; // Defaults to ".debug_frame".
624 /// DwarfPubNamesSection - Section directive for Dwarf info.
626 const char *DwarfPubNamesSection; // Defaults to ".debug_pubnames".
628 /// DwarfPubTypesSection - Section directive for Dwarf info.
630 const char *DwarfPubTypesSection; // Defaults to ".debug_pubtypes".
632 /// DwarfDebugInlineSection - Section directive for inline info.
634 const char *DwarfDebugInlineSection; // Defaults to ".debug_inlined"
636 /// DwarfStrSection - Section directive for Dwarf info.
638 const char *DwarfStrSection; // Defaults to ".debug_str".
640 /// DwarfLocSection - Section directive for Dwarf info.
642 const char *DwarfLocSection; // Defaults to ".debug_loc".
644 /// DwarfARangesSection - Section directive for Dwarf info.
646 const char *DwarfARangesSection; // Defaults to ".debug_aranges".
648 /// DwarfRangesSection - Section directive for Dwarf info.
650 const char *DwarfRangesSection; // Defaults to ".debug_ranges".
652 /// DwarfMacroInfoSection - Section directive for DWARF macro info.
654 const char *DwarfMacroInfoSection; // Defaults to ".debug_macinfo".
656 /// DwarfEHFrameSection - Section directive for Exception frames.
658 const char *DwarfEHFrameSection; // Defaults to ".eh_frame".
660 /// DwarfExceptionSection - Section directive for Exception table.
662 const char *DwarfExceptionSection; // Defaults to ".gcc_except_table".
664 //===--- CBE Asm Translation Table -----------------------------------===//
666 const char *const *AsmTransCBE; // Defaults to empty
669 explicit TargetAsmInfo(const TargetMachine &TM);
670 virtual ~TargetAsmInfo();
672 const Section* getNamedSection(const char *Name,
673 unsigned Flags = SectionFlags::None,
674 bool Override = false) const;
675 const Section* getUnnamedSection(const char *Directive,
676 unsigned Flags = SectionFlags::None,
677 bool Override = false) const;
679 /// Measure the specified inline asm to determine an approximation of its
681 virtual unsigned getInlineAsmLength(const char *Str) const;
683 /// emitUsedDirectiveFor - This hook allows targets to selectively decide
684 /// not to emit the UsedDirective for some symbols in llvm.used.
685 // FIXME: REMOVE this (rdar://7071300)
686 virtual bool emitUsedDirectiveFor(const GlobalValue *GV,
687 Mangler *Mang) const {
691 /// PreferredEHDataFormat - This hook allows the target to select data
692 /// format used for encoding pointers in exception handling data. Reason is
693 /// 0 for data, 1 for code labels, 2 for function pointers. Global is true
694 /// if the symbol can be relocated.
695 virtual unsigned PreferredEHDataFormat(DwarfEncoding::Target Reason,
699 /// getSectionForMergeableConstant - Given a Mergeable constant with the
700 /// specified size and relocation information, return a section that it
701 /// should be placed in.
702 virtual const Section *getSectionForMergeableConstant(SectionKind Kind)const;
705 /// getSectionPrefixForUniqueGlobal - Return a string that we should prepend
706 /// onto a global's name in order to get the unique section name for the
707 /// global. This is important for globals that need to be merged across
708 /// translation units.
710 getSectionPrefixForUniqueGlobal(SectionKind Kind) const {
714 /// getFlagsForNamedSection - If this target wants to be able to infer
715 /// section flags based on the name of the section specified for a global
716 /// variable, it can implement this. This is used on ELF systems so that
717 /// ".tbss" gets the TLS bit set etc.
718 virtual unsigned getFlagsForNamedSection(const char *Section) const {
722 /// SectionForGlobal - This method computes the appropriate section to emit
723 /// the specified global variable or function definition. This should not
724 /// be passed external (or available externally) globals.
725 // FIXME: MOVE TO ASMPRINTER.
726 const Section* SectionForGlobal(const GlobalValue *GV) const;
728 /// getSpecialCasedSectionGlobals - Allow the target to completely override
729 /// section assignment of a global.
730 /// FIXME: ELIMINATE this by making PIC16 implement ADDRESS with
731 /// getFlagsForNamedSection.
732 virtual const Section *
733 getSpecialCasedSectionGlobals(const GlobalValue *GV,
734 SectionKind Kind) const {
738 const std::string &getSectionFlags(unsigned Flags) const;
739 virtual std::string printSectionFlags(unsigned flags) const { return ""; }
741 // FIXME: Eliminate this.
742 virtual const Section* SelectSectionForGlobal(const GlobalValue *GV,
743 SectionKind Kind) const;
745 /// getSLEB128Size - Compute the number of bytes required for a signed
747 static unsigned getSLEB128Size(int Value);
749 /// getULEB128Size - Compute the number of bytes required for an unsigned
751 static unsigned getULEB128Size(unsigned Value);
753 // Data directive accessors.
755 const char *getData8bitsDirective(unsigned AS = 0) const {
756 return AS == 0 ? Data8bitsDirective : getDataASDirective(8, AS);
758 const char *getData16bitsDirective(unsigned AS = 0) const {
759 return AS == 0 ? Data16bitsDirective : getDataASDirective(16, AS);
761 const char *getData32bitsDirective(unsigned AS = 0) const {
762 return AS == 0 ? Data32bitsDirective : getDataASDirective(32, AS);
764 const char *getData64bitsDirective(unsigned AS = 0) const {
765 return AS == 0 ? Data64bitsDirective : getDataASDirective(64, AS);
771 const Section *getTextSection() const {
774 const Section *getDataSection() const {
777 const char *getBSSSection() const {
780 const Section *getBSSSection_() const {
783 const Section *getReadOnlySection() const {
784 return ReadOnlySection;
786 const Section *getTLSDataSection() const {
787 return TLSDataSection;
789 const Section *getTLSBSSSection() const {
790 return TLSBSSSection;
792 const char *getZeroFillDirective() const {
793 return ZeroFillDirective;
795 const char *getNonexecutableStackDirective() const {
796 return NonexecutableStackDirective;
798 bool needsSet() const {
801 const char *getPCSymbol() const {
804 char getSeparatorChar() const {
805 return SeparatorChar;
807 unsigned getCommentColumn() const {
808 return CommentColumn;
810 const char *getCommentString() const {
811 return CommentString;
813 unsigned getOperandColumn(int operand) const {
814 return FirstOperandColumn + (MaxOperandLength+1)*(operand-1);
816 const char *getGlobalPrefix() const {
819 const char *getPrivateGlobalPrefix() const {
820 return PrivateGlobalPrefix;
822 const char *getLinkerPrivateGlobalPrefix() const {
823 return LinkerPrivateGlobalPrefix;
825 const char *getJumpTableSpecialLabelPrefix() const {
826 return JumpTableSpecialLabelPrefix;
828 const char *getGlobalVarAddrPrefix() const {
829 return GlobalVarAddrPrefix;
831 const char *getGlobalVarAddrSuffix() const {
832 return GlobalVarAddrSuffix;
834 const char *getFunctionAddrPrefix() const {
835 return FunctionAddrPrefix;
837 const char *getFunctionAddrSuffix() const {
838 return FunctionAddrSuffix;
840 const char *getPersonalityPrefix() const {
841 return PersonalityPrefix;
843 const char *getPersonalitySuffix() const {
844 return PersonalitySuffix;
846 bool getNeedsIndirectEncoding() const {
847 return NeedsIndirectEncoding;
849 const char *getInlineAsmStart() const {
850 return InlineAsmStart;
852 const char *getInlineAsmEnd() const {
855 unsigned getAssemblerDialect() const {
856 return AssemblerDialect;
858 bool doesAllowQuotesInName() const {
859 return AllowQuotesInName;
861 const char *getZeroDirective() const {
862 return ZeroDirective;
864 const char *getZeroDirectiveSuffix() const {
865 return ZeroDirectiveSuffix;
867 const char *getAsciiDirective() const {
868 return AsciiDirective;
870 const char *getAscizDirective() const {
871 return AscizDirective;
873 const char *getJumpTableDirective() const {
874 return JumpTableDirective;
876 const char *getAlignDirective() const {
877 return AlignDirective;
879 bool getAlignmentIsInBytes() const {
880 return AlignmentIsInBytes;
882 unsigned getTextAlignFillValue() const {
883 return TextAlignFillValue;
885 const char *getSwitchToSectionDirective() const {
886 return SwitchToSectionDirective;
888 const char *getTextSectionStartSuffix() const {
889 return TextSectionStartSuffix;
891 const char *getDataSectionStartSuffix() const {
892 return DataSectionStartSuffix;
894 const char *getSectionEndDirectiveSuffix() const {
895 return SectionEndDirectiveSuffix;
897 const char *getConstantPoolSection() const {
898 return ConstantPoolSection;
900 const char *getJumpTableDataSection() const {
901 return JumpTableDataSection;
903 const char *getCStringSection() const {
904 return CStringSection;
906 const Section *getCStringSection_() const {
907 return CStringSection_;
909 const char *getStaticCtorsSection() const {
910 return StaticCtorsSection;
912 const char *getStaticDtorsSection() const {
913 return StaticDtorsSection;
915 const char *getGlobalDirective() const {
916 return GlobalDirective;
918 const char *getExternDirective() const {
919 return ExternDirective;
921 const char *getSetDirective() const {
924 const char *getLCOMMDirective() const {
925 return LCOMMDirective;
927 const char *getCOMMDirective() const {
928 return COMMDirective;
930 bool getCOMMDirectiveTakesAlignment() const {
931 return COMMDirectiveTakesAlignment;
933 bool hasDotTypeDotSizeDirective() const {
934 return HasDotTypeDotSizeDirective;
936 bool hasSingleParameterDotFile() const {
937 return HasSingleParameterDotFile;
939 const char *getUsedDirective() const {
940 return UsedDirective;
942 const char *getWeakRefDirective() const {
943 return WeakRefDirective;
945 const char *getWeakDefDirective() const {
946 return WeakDefDirective;
948 const char *getHiddenDirective() const {
949 return HiddenDirective;
951 const char *getProtectedDirective() const {
952 return ProtectedDirective;
954 bool isAbsoluteDebugSectionOffsets() const {
955 return AbsoluteDebugSectionOffsets;
957 bool isAbsoluteEHSectionOffsets() const {
958 return AbsoluteEHSectionOffsets;
960 bool hasLEB128() const {
963 bool hasDotLocAndDotFile() const {
964 return HasDotLocAndDotFile;
966 bool doesSupportDebugInformation() const {
967 return SupportsDebugInformation;
969 bool doesSupportExceptionHandling() const {
970 return SupportsExceptionHandling;
972 bool doesDwarfRequireFrameSection() const {
973 return DwarfRequiresFrameSection;
975 bool doesDwarfUsesInlineInfoSection() const {
976 return DwarfUsesInlineInfoSection;
978 bool is_EHSymbolPrivate() const {
979 return Is_EHSymbolPrivate;
981 const char *getGlobalEHDirective() const {
982 return GlobalEHDirective;
984 bool getSupportsWeakOmittedEHFrame() const {
985 return SupportsWeakOmittedEHFrame;
987 const char *getDwarfSectionOffsetDirective() const {
988 return DwarfSectionOffsetDirective;
990 const char *getDwarfAbbrevSection() const {
991 return DwarfAbbrevSection;
993 const char *getDwarfInfoSection() const {
994 return DwarfInfoSection;
996 const char *getDwarfLineSection() const {
997 return DwarfLineSection;
999 const char *getDwarfFrameSection() const {
1000 return DwarfFrameSection;
1002 const char *getDwarfPubNamesSection() const {
1003 return DwarfPubNamesSection;
1005 const char *getDwarfPubTypesSection() const {
1006 return DwarfPubTypesSection;
1008 const char *getDwarfDebugInlineSection() const {
1009 return DwarfDebugInlineSection;
1011 const char *getDwarfStrSection() const {
1012 return DwarfStrSection;
1014 const char *getDwarfLocSection() const {
1015 return DwarfLocSection;
1017 const char *getDwarfARangesSection() const {
1018 return DwarfARangesSection;
1020 const char *getDwarfRangesSection() const {
1021 return DwarfRangesSection;
1023 const char *getDwarfMacroInfoSection() const {
1024 return DwarfMacroInfoSection;
1026 const char *getDwarfEHFrameSection() const {
1027 return DwarfEHFrameSection;
1029 const char *getDwarfExceptionSection() const {
1030 return DwarfExceptionSection;
1032 const char *const *getAsmCBE() const {