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
128 Kind K : 8; // This is private.
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) {
186 SectionKind Res = { K };
191 namespace SectionFlags {
192 const unsigned Invalid = -1U;
193 const unsigned None = 0;
194 const unsigned Code = 1 << 0; ///< Section contains code
195 const unsigned Writable = 1 << 1; ///< Section is writeable
196 const unsigned BSS = 1 << 2; ///< Section contains only zeroes
197 const unsigned Mergeable = 1 << 3; ///< Section contains mergeable data
198 const unsigned Strings = 1 << 4; ///< Section contains C-type strings
199 const unsigned TLS = 1 << 5; ///< Section contains thread-local data
200 const unsigned Debug = 1 << 6; ///< Section contains debug data
201 const unsigned Linkonce = 1 << 7; ///< Section is linkonce
202 const unsigned TypeFlags = 0xFF;
203 // Some gap for future flags
205 /// Named - True if this section should be printed with ".section <name>",
206 /// false if the section name is something like ".const".
207 const unsigned Named = 1 << 23; ///< Section is named
208 const unsigned EntitySize = 0xFF << 24; ///< Entity size for mergeable stuff
210 static inline unsigned getEntitySize(unsigned Flags) {
211 return (Flags >> 24) & 0xFF;
214 // FIXME: Why does this return a value?
215 static inline unsigned setEntitySize(unsigned Flags, unsigned Size) {
216 return (Flags & ~EntitySize) | ((Size & 0xFF) << 24);
220 static inline unsigned getEmptyKey() { return Invalid; }
221 static inline unsigned getTombstoneKey() { return Invalid - 1; }
222 static unsigned getHashValue(const unsigned &Key) { return Key; }
223 static bool isEqual(unsigned LHS, unsigned RHS) { return LHS == RHS; }
224 static bool isPod() { return true; }
227 typedef DenseMap<unsigned, std::string, KeyInfo> FlagsStringsMapType;
237 friend class TargetAsmInfo;
238 friend class StringMapEntry<Section>;
239 friend class StringMap<Section>;
243 explicit Section(unsigned F = SectionFlags::Invalid) : Flags(F) { }
247 unsigned getEntitySize() const { return (Flags >> 24) & 0xFF; }
249 const std::string &getName() const { return Name; }
250 unsigned getFlags() const { return Flags; }
252 bool hasFlag(unsigned F) const { return (Flags & F) != 0; }
255 /// TargetAsmInfo - This class is intended to be used as a base class for asm
256 /// properties and features specific to the target.
257 class TargetAsmInfo {
259 mutable StringMap<Section> Sections;
260 mutable SectionFlags::FlagsStringsMapType FlagsStrings;
262 /// TM - The current TargetMachine.
263 const TargetMachine &TM;
265 //===------------------------------------------------------------------===//
266 // Properties to be set by the target writer, used to configure asm printer.
269 /// TextSection - Section directive for standard text.
271 const Section *TextSection; // Defaults to ".text".
273 /// DataSection - Section directive for standard data.
275 const Section *DataSection; // Defaults to ".data".
277 /// BSSSection - Section directive for uninitialized data. Null if this
278 /// target doesn't support a BSS section.
280 const char *BSSSection; // Default to ".bss".
281 const Section *BSSSection_;
283 /// ReadOnlySection - This is the directive that is emitted to switch to a
284 /// read-only section for constant data (e.g. data declared const,
286 const Section *ReadOnlySection; // Defaults to NULL
288 /// TLSDataSection - Section directive for Thread Local data.
290 const Section *TLSDataSection; // Defaults to ".tdata".
292 /// TLSBSSSection - Section directive for Thread Local uninitialized data.
293 /// Null if this target doesn't support a BSS section.
295 const Section *TLSBSSSection; // Defaults to ".tbss".
297 /// ZeroFillDirective - Directive for emitting a global to the ZeroFill
298 /// section on this target. Null if this target doesn't support zerofill.
299 const char *ZeroFillDirective; // Default is null.
301 /// NonexecutableStackDirective - Directive for declaring to the
302 /// linker and beyond that the emitted code does not require stack
303 /// memory to be executable.
304 const char *NonexecutableStackDirective; // Default is null.
306 /// NeedsSet - True if target asm treats expressions in data directives
307 /// as linktime-relocatable. For assembly-time computation, we need to
308 /// use a .set. Thus:
311 /// is computed at assembly time, while
313 /// is relocated if the relative locations of x and y change at linktime.
314 /// We want both these things in different places.
315 bool NeedsSet; // Defaults to false.
317 /// MaxInstLength - This is the maximum possible length of an instruction,
318 /// which is needed to compute the size of an inline asm.
319 unsigned MaxInstLength; // Defaults to 4.
321 /// PCSymbol - The symbol used to represent the current PC. Used in PC
322 /// relative expressions.
323 const char *PCSymbol; // Defaults to "$".
325 /// SeparatorChar - This character, if specified, is used to separate
326 /// instructions from each other when on the same line. This is used to
327 /// measure inline asm instructions.
328 char SeparatorChar; // Defaults to ';'
330 /// CommentColumn - This indicates the comment num (zero-based) at
331 /// which asm comments should be printed.
332 unsigned CommentColumn; // Defaults to 60
334 /// CommentString - This indicates the comment character used by the
336 const char *CommentString; // Defaults to "#"
338 /// FirstOperandColumn - The output column where the first operand
339 /// should be printed
340 unsigned FirstOperandColumn; // Defaults to 0 (ignored)
342 /// MaxOperandLength - The maximum length of any printed asm
344 unsigned MaxOperandLength; // Defaults to 0 (ignored)
346 /// GlobalPrefix - If this is set to a non-empty string, it is prepended
347 /// onto all global symbols. This is often used for "_" or ".".
348 const char *GlobalPrefix; // Defaults to ""
350 /// PrivateGlobalPrefix - This prefix is used for globals like constant
351 /// pool entries that are completely private to the .s file and should not
352 /// have names in the .o file. This is often "." or "L".
353 const char *PrivateGlobalPrefix; // Defaults to "."
355 /// LinkerPrivateGlobalPrefix - This prefix is used for symbols that should
356 /// be passed through the assembler but be removed by the linker. This
357 /// is "l" on Darwin, currently used for some ObjC metadata.
358 const char *LinkerPrivateGlobalPrefix; // Defaults to ""
360 /// JumpTableSpecialLabelPrefix - If not null, a extra (dead) label is
361 /// emitted before jump tables with the specified prefix.
362 const char *JumpTableSpecialLabelPrefix; // Default to null.
364 /// GlobalVarAddrPrefix/Suffix - If these are nonempty, these strings
365 /// will enclose any GlobalVariable (that isn't a function)
367 const char *GlobalVarAddrPrefix; // Defaults to ""
368 const char *GlobalVarAddrSuffix; // Defaults to ""
370 /// FunctionAddrPrefix/Suffix - If these are nonempty, these strings
371 /// will enclose any GlobalVariable that points to a function.
373 const char *FunctionAddrPrefix; // Defaults to ""
374 const char *FunctionAddrSuffix; // Defaults to ""
376 /// PersonalityPrefix/Suffix - If these are nonempty, these strings will
377 /// enclose any personality function in the common frame section.
379 const char *PersonalityPrefix; // Defaults to ""
380 const char *PersonalitySuffix; // Defaults to ""
382 /// NeedsIndirectEncoding - If set, we need to set the indirect encoding bit
385 bool NeedsIndirectEncoding; // Defaults to false
387 /// InlineAsmStart/End - If these are nonempty, they contain a directive to
388 /// emit before and after an inline assembly statement.
389 const char *InlineAsmStart; // Defaults to "#APP\n"
390 const char *InlineAsmEnd; // Defaults to "#NO_APP\n"
392 /// AssemblerDialect - Which dialect of an assembler variant to use.
393 unsigned AssemblerDialect; // Defaults to 0
395 /// AllowQuotesInName - This is true if the assembler allows for complex
396 /// symbol names to be surrounded in quotes. This defaults to false.
397 bool AllowQuotesInName;
399 //===--- Data Emission Directives -------------------------------------===//
401 /// ZeroDirective - this should be set to the directive used to get some
402 /// number of zero bytes emitted to the current section. Common cases are
403 /// "\t.zero\t" and "\t.space\t". If this is set to null, the
404 /// Data*bitsDirective's will be used to emit zero bytes.
405 const char *ZeroDirective; // Defaults to "\t.zero\t"
406 const char *ZeroDirectiveSuffix; // Defaults to ""
408 /// AsciiDirective - This directive allows emission of an ascii string with
409 /// the standard C escape characters embedded into it.
410 const char *AsciiDirective; // Defaults to "\t.ascii\t"
412 /// AscizDirective - If not null, this allows for special handling of
413 /// zero terminated strings on this target. This is commonly supported as
414 /// ".asciz". If a target doesn't support this, it can be set to null.
415 const char *AscizDirective; // Defaults to "\t.asciz\t"
417 /// DataDirectives - These directives are used to output some unit of
418 /// integer data to the current section. If a data directive is set to
419 /// null, smaller data directives will be used to emit the large sizes.
420 const char *Data8bitsDirective; // Defaults to "\t.byte\t"
421 const char *Data16bitsDirective; // Defaults to "\t.short\t"
422 const char *Data32bitsDirective; // Defaults to "\t.long\t"
423 const char *Data64bitsDirective; // Defaults to "\t.quad\t"
425 /// getDataASDirective - Return the directive that should be used to emit
426 /// data of the specified size to the specified numeric address space.
427 virtual const char *getDataASDirective(unsigned Size, unsigned AS) const {
428 assert(AS != 0 && "Don't know the directives for default addr space");
432 //===--- Alignment Information ----------------------------------------===//
434 /// AlignDirective - The directive used to emit round up to an alignment
437 const char *AlignDirective; // Defaults to "\t.align\t"
439 /// AlignmentIsInBytes - If this is true (the default) then the asmprinter
440 /// emits ".align N" directives, where N is the number of bytes to align to.
441 /// Otherwise, it emits ".align log2(N)", e.g. 3 to align to an 8 byte
443 bool AlignmentIsInBytes; // Defaults to true
445 /// TextAlignFillValue - If non-zero, this is used to fill the executable
446 /// space created as the result of a alignment directive.
447 unsigned TextAlignFillValue;
449 //===--- Section Switching Directives ---------------------------------===//
451 /// SwitchToSectionDirective - This is the directive used when we want to
452 /// emit a global to an arbitrary section. The section name is emited after
454 const char *SwitchToSectionDirective; // Defaults to "\t.section\t"
456 /// TextSectionStartSuffix - This is printed after each start of section
457 /// directive for text sections.
458 const char *TextSectionStartSuffix; // Defaults to "".
460 /// DataSectionStartSuffix - This is printed after each start of section
461 /// directive for data sections.
462 const char *DataSectionStartSuffix; // Defaults to "".
464 /// SectionEndDirectiveSuffix - If non-null, the asm printer will close each
465 /// section with the section name and this suffix printed.
466 const char *SectionEndDirectiveSuffix;// Defaults to null.
468 /// ConstantPoolSection - This is the section that we SwitchToSection right
469 /// before emitting the constant pool for a function.
470 const char *ConstantPoolSection; // Defaults to "\t.section .rodata"
472 /// JumpTableDataSection - This is the section that we SwitchToSection right
473 /// before emitting the jump tables for a function when the relocation model
475 const char *JumpTableDataSection; // Defaults to "\t.section .rodata"
477 /// JumpTableDirective - if non-null, the directive to emit before a jump
479 const char *JumpTableDirective;
481 /// CStringSection - If not null, this allows for special handling of
482 /// cstring constants (null terminated string that does not contain any
483 /// other null bytes) on this target. This is commonly supported as
485 const char *CStringSection; // Defaults to NULL
486 const Section *CStringSection_;
488 /// StaticCtorsSection - This is the directive that is emitted to switch to
489 /// a section to emit the static constructor list.
490 /// Defaults to "\t.section .ctors,\"aw\",@progbits".
491 const char *StaticCtorsSection;
493 /// StaticDtorsSection - This is the directive that is emitted to switch to
494 /// a section to emit the static destructor list.
495 /// Defaults to "\t.section .dtors,\"aw\",@progbits".
496 const char *StaticDtorsSection;
498 //===--- Global Variable Emission Directives --------------------------===//
500 /// GlobalDirective - This is the directive used to declare a global entity.
502 const char *GlobalDirective; // Defaults to NULL.
504 /// ExternDirective - This is the directive used to declare external
507 const char *ExternDirective; // Defaults to NULL.
509 /// SetDirective - This is the name of a directive that can be used to tell
510 /// the assembler to set the value of a variable to some expression.
511 const char *SetDirective; // Defaults to null.
513 /// LCOMMDirective - This is the name of a directive (if supported) that can
514 /// be used to efficiently declare a local (internal) block of zero
515 /// initialized data in the .bss/.data section. The syntax expected is:
516 /// @verbatim <LCOMMDirective> SYMBOLNAME LENGTHINBYTES, ALIGNMENT
518 const char *LCOMMDirective; // Defaults to null.
520 const char *COMMDirective; // Defaults to "\t.comm\t".
522 /// COMMDirectiveTakesAlignment - True if COMMDirective take a third
523 /// argument that specifies the alignment of the declaration.
524 bool COMMDirectiveTakesAlignment; // Defaults to true.
526 /// HasDotTypeDotSizeDirective - True if the target has .type and .size
527 /// directives, this is true for most ELF targets.
528 bool HasDotTypeDotSizeDirective; // Defaults to true.
530 /// HasSingleParameterDotFile - True if the target has a single parameter
531 /// .file directive, this is true for ELF targets.
532 bool HasSingleParameterDotFile; // Defaults to true.
534 /// UsedDirective - This directive, if non-null, is used to declare a global
535 /// as being used somehow that the assembler can't see. This prevents dead
536 /// code elimination on some targets.
537 const char *UsedDirective; // Defaults to null.
539 /// WeakRefDirective - This directive, if non-null, is used to declare a
540 /// global as being a weak undefined symbol.
541 const char *WeakRefDirective; // Defaults to null.
543 /// WeakDefDirective - This directive, if non-null, is used to declare a
544 /// global as being a weak defined symbol.
545 const char *WeakDefDirective; // Defaults to null.
547 /// HiddenDirective - This directive, if non-null, is used to declare a
548 /// global or function as having hidden visibility.
549 const char *HiddenDirective; // Defaults to "\t.hidden\t".
551 /// ProtectedDirective - This directive, if non-null, is used to declare a
552 /// global or function as having protected visibility.
553 const char *ProtectedDirective; // Defaults to "\t.protected\t".
555 //===--- Dwarf Emission Directives -----------------------------------===//
557 /// AbsoluteDebugSectionOffsets - True if we should emit abolute section
558 /// offsets for debug information. Defaults to false.
559 bool AbsoluteDebugSectionOffsets;
561 /// AbsoluteEHSectionOffsets - True if we should emit abolute section
562 /// offsets for EH information. Defaults to false.
563 bool AbsoluteEHSectionOffsets;
565 /// HasLEB128 - True if target asm supports leb128 directives.
567 bool HasLEB128; // Defaults to false.
569 /// hasDotLocAndDotFile - True if target asm supports .loc and .file
570 /// directives for emitting debugging information.
572 bool HasDotLocAndDotFile; // Defaults to false.
574 /// SupportsDebugInformation - True if target supports emission of debugging
576 bool SupportsDebugInformation;
578 /// SupportsExceptionHandling - True if target supports
579 /// exception handling.
581 bool SupportsExceptionHandling; // Defaults to false.
583 /// RequiresFrameSection - true if the Dwarf2 output needs a frame section
585 bool DwarfRequiresFrameSection; // Defaults to true.
587 /// DwarfUsesInlineInfoSection - True if DwarfDebugInlineSection is used to
588 /// encode inline subroutine information.
589 bool DwarfUsesInlineInfoSection; // Defaults to false.
591 /// Is_EHSymbolPrivate - If set, the "_foo.eh" is made private so that it
592 /// doesn't show up in the symbol table of the object file.
593 bool Is_EHSymbolPrivate; // Defaults to true.
595 /// GlobalEHDirective - This is the directive used to make exception frame
596 /// tables globally visible.
598 const char *GlobalEHDirective; // Defaults to NULL.
600 /// SupportsWeakEmptyEHFrame - True if target assembler and linker will
601 /// handle a weak_definition of constant 0 for an omitted EH frame.
602 bool SupportsWeakOmittedEHFrame; // Defaults to true.
604 /// DwarfSectionOffsetDirective - Special section offset directive.
605 const char* DwarfSectionOffsetDirective; // Defaults to NULL
607 /// DwarfAbbrevSection - Section directive for Dwarf abbrev.
609 const char *DwarfAbbrevSection; // Defaults to ".debug_abbrev".
611 /// DwarfInfoSection - Section directive for Dwarf info.
613 const char *DwarfInfoSection; // Defaults to ".debug_info".
615 /// DwarfLineSection - Section directive for Dwarf info.
617 const char *DwarfLineSection; // Defaults to ".debug_line".
619 /// DwarfFrameSection - Section directive for Dwarf info.
621 const char *DwarfFrameSection; // Defaults to ".debug_frame".
623 /// DwarfPubNamesSection - Section directive for Dwarf info.
625 const char *DwarfPubNamesSection; // Defaults to ".debug_pubnames".
627 /// DwarfPubTypesSection - Section directive for Dwarf info.
629 const char *DwarfPubTypesSection; // Defaults to ".debug_pubtypes".
631 /// DwarfDebugInlineSection - Section directive for inline info.
633 const char *DwarfDebugInlineSection; // Defaults to ".debug_inlined"
635 /// DwarfStrSection - Section directive for Dwarf info.
637 const char *DwarfStrSection; // Defaults to ".debug_str".
639 /// DwarfLocSection - Section directive for Dwarf info.
641 const char *DwarfLocSection; // Defaults to ".debug_loc".
643 /// DwarfARangesSection - Section directive for Dwarf info.
645 const char *DwarfARangesSection; // Defaults to ".debug_aranges".
647 /// DwarfRangesSection - Section directive for Dwarf info.
649 const char *DwarfRangesSection; // Defaults to ".debug_ranges".
651 /// DwarfMacroInfoSection - Section directive for DWARF macro info.
653 const char *DwarfMacroInfoSection; // Defaults to ".debug_macinfo".
655 /// DwarfEHFrameSection - Section directive for Exception frames.
657 const char *DwarfEHFrameSection; // Defaults to ".eh_frame".
659 /// DwarfExceptionSection - Section directive for Exception table.
661 const char *DwarfExceptionSection; // Defaults to ".gcc_except_table".
663 //===--- CBE Asm Translation Table -----------------------------------===//
665 const char *const *AsmTransCBE; // Defaults to empty
668 explicit TargetAsmInfo(const TargetMachine &TM);
669 virtual ~TargetAsmInfo();
671 const Section* getNamedSection(const char *Name,
672 unsigned Flags = SectionFlags::None,
673 bool Override = false) const;
674 const Section* getUnnamedSection(const char *Directive,
675 unsigned Flags = SectionFlags::None,
676 bool Override = false) const;
678 /// Measure the specified inline asm to determine an approximation of its
680 virtual unsigned getInlineAsmLength(const char *Str) const;
682 /// emitUsedDirectiveFor - This hook allows targets to selectively decide
683 /// not to emit the UsedDirective for some symbols in llvm.used.
684 // FIXME: REMOVE this (rdar://7071300)
685 virtual bool emitUsedDirectiveFor(const GlobalValue *GV,
686 Mangler *Mang) const {
690 /// PreferredEHDataFormat - This hook allows the target to select data
691 /// format used for encoding pointers in exception handling data. Reason is
692 /// 0 for data, 1 for code labels, 2 for function pointers. Global is true
693 /// if the symbol can be relocated.
694 virtual unsigned PreferredEHDataFormat(DwarfEncoding::Target Reason,
698 /// getSectionForMergeableConstant - Given a Mergeable constant with the
699 /// specified size and relocation information, return a section that it
700 /// should be placed in.
701 virtual const Section *getSectionForMergeableConstant(SectionKind Kind)const;
704 /// getSectionPrefixForUniqueGlobal - Return a string that we should prepend
705 /// onto a global's name in order to get the unique section name for the
706 /// global. This is important for globals that need to be merged across
707 /// translation units.
709 getSectionPrefixForUniqueGlobal(SectionKind Kind) const {
713 /// getFlagsForNamedSection - If this target wants to be able to infer
714 /// section flags based on the name of the section specified for a global
715 /// variable, it can implement this. This is used on ELF systems so that
716 /// ".tbss" gets the TLS bit set etc.
717 virtual unsigned getFlagsForNamedSection(const char *Section) const {
721 /// SectionForGlobal - This method computes the appropriate section to emit
722 /// the specified global variable or function definition. This should not
723 /// be passed external (or available externally) globals.
724 // FIXME: MOVE TO ASMPRINTER.
725 const Section* SectionForGlobal(const GlobalValue *GV) const;
727 /// getSpecialCasedSectionGlobals - Allow the target to completely override
728 /// section assignment of a global.
729 /// FIXME: ELIMINATE this by making PIC16 implement ADDRESS with
730 /// getFlagsForNamedSection.
731 virtual const Section *
732 getSpecialCasedSectionGlobals(const GlobalValue *GV,
733 SectionKind Kind) const {
737 const std::string &getSectionFlags(unsigned Flags) const;
738 virtual std::string printSectionFlags(unsigned flags) const { return ""; }
740 // FIXME: Eliminate this.
741 virtual const Section* SelectSectionForGlobal(const GlobalValue *GV,
742 SectionKind Kind) const;
744 /// getSLEB128Size - Compute the number of bytes required for a signed
746 static unsigned getSLEB128Size(int Value);
748 /// getULEB128Size - Compute the number of bytes required for an unsigned
750 static unsigned getULEB128Size(unsigned Value);
752 // Data directive accessors.
754 const char *getData8bitsDirective(unsigned AS = 0) const {
755 return AS == 0 ? Data8bitsDirective : getDataASDirective(8, AS);
757 const char *getData16bitsDirective(unsigned AS = 0) const {
758 return AS == 0 ? Data16bitsDirective : getDataASDirective(16, AS);
760 const char *getData32bitsDirective(unsigned AS = 0) const {
761 return AS == 0 ? Data32bitsDirective : getDataASDirective(32, AS);
763 const char *getData64bitsDirective(unsigned AS = 0) const {
764 return AS == 0 ? Data64bitsDirective : getDataASDirective(64, AS);
770 const Section *getTextSection() const {
773 const Section *getDataSection() const {
776 const char *getBSSSection() const {
779 const Section *getBSSSection_() const {
782 const Section *getReadOnlySection() const {
783 return ReadOnlySection;
785 const Section *getTLSDataSection() const {
786 return TLSDataSection;
788 const Section *getTLSBSSSection() const {
789 return TLSBSSSection;
791 const char *getZeroFillDirective() const {
792 return ZeroFillDirective;
794 const char *getNonexecutableStackDirective() const {
795 return NonexecutableStackDirective;
797 bool needsSet() const {
800 const char *getPCSymbol() const {
803 char getSeparatorChar() const {
804 return SeparatorChar;
806 unsigned getCommentColumn() const {
807 return CommentColumn;
809 const char *getCommentString() const {
810 return CommentString;
812 unsigned getOperandColumn(int operand) const {
813 return FirstOperandColumn + (MaxOperandLength+1)*(operand-1);
815 const char *getGlobalPrefix() const {
818 const char *getPrivateGlobalPrefix() const {
819 return PrivateGlobalPrefix;
821 const char *getLinkerPrivateGlobalPrefix() const {
822 return LinkerPrivateGlobalPrefix;
824 const char *getJumpTableSpecialLabelPrefix() const {
825 return JumpTableSpecialLabelPrefix;
827 const char *getGlobalVarAddrPrefix() const {
828 return GlobalVarAddrPrefix;
830 const char *getGlobalVarAddrSuffix() const {
831 return GlobalVarAddrSuffix;
833 const char *getFunctionAddrPrefix() const {
834 return FunctionAddrPrefix;
836 const char *getFunctionAddrSuffix() const {
837 return FunctionAddrSuffix;
839 const char *getPersonalityPrefix() const {
840 return PersonalityPrefix;
842 const char *getPersonalitySuffix() const {
843 return PersonalitySuffix;
845 bool getNeedsIndirectEncoding() const {
846 return NeedsIndirectEncoding;
848 const char *getInlineAsmStart() const {
849 return InlineAsmStart;
851 const char *getInlineAsmEnd() const {
854 unsigned getAssemblerDialect() const {
855 return AssemblerDialect;
857 bool doesAllowQuotesInName() const {
858 return AllowQuotesInName;
860 const char *getZeroDirective() const {
861 return ZeroDirective;
863 const char *getZeroDirectiveSuffix() const {
864 return ZeroDirectiveSuffix;
866 const char *getAsciiDirective() const {
867 return AsciiDirective;
869 const char *getAscizDirective() const {
870 return AscizDirective;
872 const char *getJumpTableDirective() const {
873 return JumpTableDirective;
875 const char *getAlignDirective() const {
876 return AlignDirective;
878 bool getAlignmentIsInBytes() const {
879 return AlignmentIsInBytes;
881 unsigned getTextAlignFillValue() const {
882 return TextAlignFillValue;
884 const char *getSwitchToSectionDirective() const {
885 return SwitchToSectionDirective;
887 const char *getTextSectionStartSuffix() const {
888 return TextSectionStartSuffix;
890 const char *getDataSectionStartSuffix() const {
891 return DataSectionStartSuffix;
893 const char *getSectionEndDirectiveSuffix() const {
894 return SectionEndDirectiveSuffix;
896 const char *getConstantPoolSection() const {
897 return ConstantPoolSection;
899 const char *getJumpTableDataSection() const {
900 return JumpTableDataSection;
902 const char *getCStringSection() const {
903 return CStringSection;
905 const Section *getCStringSection_() const {
906 return CStringSection_;
908 const char *getStaticCtorsSection() const {
909 return StaticCtorsSection;
911 const char *getStaticDtorsSection() const {
912 return StaticDtorsSection;
914 const char *getGlobalDirective() const {
915 return GlobalDirective;
917 const char *getExternDirective() const {
918 return ExternDirective;
920 const char *getSetDirective() const {
923 const char *getLCOMMDirective() const {
924 return LCOMMDirective;
926 const char *getCOMMDirective() const {
927 return COMMDirective;
929 bool getCOMMDirectiveTakesAlignment() const {
930 return COMMDirectiveTakesAlignment;
932 bool hasDotTypeDotSizeDirective() const {
933 return HasDotTypeDotSizeDirective;
935 bool hasSingleParameterDotFile() const {
936 return HasSingleParameterDotFile;
938 const char *getUsedDirective() const {
939 return UsedDirective;
941 const char *getWeakRefDirective() const {
942 return WeakRefDirective;
944 const char *getWeakDefDirective() const {
945 return WeakDefDirective;
947 const char *getHiddenDirective() const {
948 return HiddenDirective;
950 const char *getProtectedDirective() const {
951 return ProtectedDirective;
953 bool isAbsoluteDebugSectionOffsets() const {
954 return AbsoluteDebugSectionOffsets;
956 bool isAbsoluteEHSectionOffsets() const {
957 return AbsoluteEHSectionOffsets;
959 bool hasLEB128() const {
962 bool hasDotLocAndDotFile() const {
963 return HasDotLocAndDotFile;
965 bool doesSupportDebugInformation() const {
966 return SupportsDebugInformation;
968 bool doesSupportExceptionHandling() const {
969 return SupportsExceptionHandling;
971 bool doesDwarfRequireFrameSection() const {
972 return DwarfRequiresFrameSection;
974 bool doesDwarfUsesInlineInfoSection() const {
975 return DwarfUsesInlineInfoSection;
977 bool is_EHSymbolPrivate() const {
978 return Is_EHSymbolPrivate;
980 const char *getGlobalEHDirective() const {
981 return GlobalEHDirective;
983 bool getSupportsWeakOmittedEHFrame() const {
984 return SupportsWeakOmittedEHFrame;
986 const char *getDwarfSectionOffsetDirective() const {
987 return DwarfSectionOffsetDirective;
989 const char *getDwarfAbbrevSection() const {
990 return DwarfAbbrevSection;
992 const char *getDwarfInfoSection() const {
993 return DwarfInfoSection;
995 const char *getDwarfLineSection() const {
996 return DwarfLineSection;
998 const char *getDwarfFrameSection() const {
999 return DwarfFrameSection;
1001 const char *getDwarfPubNamesSection() const {
1002 return DwarfPubNamesSection;
1004 const char *getDwarfPubTypesSection() const {
1005 return DwarfPubTypesSection;
1007 const char *getDwarfDebugInlineSection() const {
1008 return DwarfDebugInlineSection;
1010 const char *getDwarfStrSection() const {
1011 return DwarfStrSection;
1013 const char *getDwarfLocSection() const {
1014 return DwarfLocSection;
1016 const char *getDwarfARangesSection() const {
1017 return DwarfARangesSection;
1019 const char *getDwarfRangesSection() const {
1020 return DwarfRangesSection;
1022 const char *getDwarfMacroInfoSection() const {
1023 return DwarfMacroInfoSection;
1025 const char *getDwarfEHFrameSection() const {
1026 return DwarfEHFrameSection;
1028 const char *getDwarfExceptionSection() const {
1029 return DwarfExceptionSection;
1031 const char *const *getAsmCBE() const {