1 //===- AsmParser.cpp - Parser for Assembly Files --------------------------===//
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 class implements the parser for assembly files.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/ADT/APFloat.h"
15 #include "llvm/ADT/SmallString.h"
16 #include "llvm/ADT/STLExtras.h"
17 #include "llvm/ADT/StringMap.h"
18 #include "llvm/ADT/Twine.h"
19 #include "llvm/MC/MCAsmInfo.h"
20 #include "llvm/MC/MCContext.h"
21 #include "llvm/MC/MCDwarf.h"
22 #include "llvm/MC/MCExpr.h"
23 #include "llvm/MC/MCInstPrinter.h"
24 #include "llvm/MC/MCInstrInfo.h"
25 #include "llvm/MC/MCParser/AsmCond.h"
26 #include "llvm/MC/MCParser/AsmLexer.h"
27 #include "llvm/MC/MCParser/MCAsmParser.h"
28 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
29 #include "llvm/MC/MCRegisterInfo.h"
30 #include "llvm/MC/MCSectionMachO.h"
31 #include "llvm/MC/MCStreamer.h"
32 #include "llvm/MC/MCSymbol.h"
33 #include "llvm/MC/MCTargetAsmParser.h"
34 #include "llvm/Support/CommandLine.h"
35 #include "llvm/Support/ErrorHandling.h"
36 #include "llvm/Support/MathExtras.h"
37 #include "llvm/Support/MemoryBuffer.h"
38 #include "llvm/Support/SourceMgr.h"
39 #include "llvm/Support/raw_ostream.h"
47 FatalAssemblerWarnings("fatal-assembler-warnings",
48 cl::desc("Consider warnings as error"));
50 MCAsmParserSemaCallback::~MCAsmParserSemaCallback() {}
54 /// \brief Helper types for tracking macro definitions.
55 typedef std::vector<AsmToken> MCAsmMacroArgument;
56 typedef std::vector<MCAsmMacroArgument> MCAsmMacroArguments;
57 typedef std::pair<StringRef, MCAsmMacroArgument> MCAsmMacroParameter;
58 typedef std::vector<MCAsmMacroParameter> MCAsmMacroParameters;
63 MCAsmMacroParameters Parameters;
66 MCAsmMacro(StringRef N, StringRef B, const MCAsmMacroParameters &P) :
67 Name(N), Body(B), Parameters(P) {}
69 MCAsmMacro(const MCAsmMacro& Other)
70 : Name(Other.Name), Body(Other.Body), Parameters(Other.Parameters) {}
73 /// \brief Helper class for storing information about an active macro
75 struct MacroInstantiation {
76 /// The macro being instantiated.
77 const MCAsmMacro *TheMacro;
79 /// The macro instantiation with substitutions.
80 MemoryBuffer *Instantiation;
82 /// The location of the instantiation.
83 SMLoc InstantiationLoc;
85 /// The buffer where parsing should resume upon instantiation completion.
88 /// The location where parsing should resume upon instantiation completion.
92 MacroInstantiation(const MCAsmMacro *M, SMLoc IL, int EB, SMLoc EL,
96 struct ParseStatementInfo {
97 /// \brief The parsed operands from the last parsed statement.
98 SmallVector<MCParsedAsmOperand*, 8> ParsedOperands;
100 /// \brief The opcode from the last parsed instruction.
103 /// \brief Was there an error parsing the inline assembly?
106 SmallVectorImpl<AsmRewrite> *AsmRewrites;
108 ParseStatementInfo() : Opcode(~0U), ParseError(false), AsmRewrites(0) {}
109 ParseStatementInfo(SmallVectorImpl<AsmRewrite> *rewrites)
110 : Opcode(~0), ParseError(false), AsmRewrites(rewrites) {}
112 ~ParseStatementInfo() {
113 // Free any parsed operands.
114 for (unsigned i = 0, e = ParsedOperands.size(); i != e; ++i)
115 delete ParsedOperands[i];
116 ParsedOperands.clear();
120 /// \brief The concrete assembly parser instance.
121 class AsmParser : public MCAsmParser {
122 AsmParser(const AsmParser &) LLVM_DELETED_FUNCTION;
123 void operator=(const AsmParser &) LLVM_DELETED_FUNCTION;
128 const MCAsmInfo &MAI;
130 SourceMgr::DiagHandlerTy SavedDiagHandler;
131 void *SavedDiagContext;
132 MCAsmParserExtension *PlatformParser;
134 /// This is the current buffer index we're lexing from as managed by the
135 /// SourceMgr object.
138 AsmCond TheCondState;
139 std::vector<AsmCond> TheCondStack;
141 /// \brief maps directive names to handler methods in parser
142 /// extensions. Extensions register themselves in this map by calling
143 /// addDirectiveHandler.
144 StringMap<ExtensionDirectiveHandler> ExtensionDirectiveMap;
146 /// \brief Map of currently defined macros.
147 StringMap<MCAsmMacro*> MacroMap;
149 /// \brief Stack of active macro instantiations.
150 std::vector<MacroInstantiation*> ActiveMacros;
152 /// \brief List of bodies of anonymous macros.
153 std::deque<MCAsmMacro> MacroLikeBodies;
155 /// Boolean tracking whether macro substitution is enabled.
156 unsigned MacrosEnabledFlag : 1;
158 /// Flag tracking whether any errors have been encountered.
159 unsigned HadError : 1;
161 /// The values from the last parsed cpp hash file line comment if any.
162 StringRef CppHashFilename;
163 int64_t CppHashLineNumber;
166 /// When generating dwarf for assembly source files we need to calculate the
167 /// logical line number based on the last parsed cpp hash file line comment
168 /// and current line. Since this is slow and messes up the SourceMgr's
169 /// cache we save the last info we queried with SrcMgr.FindLineNumber().
170 SMLoc LastQueryIDLoc;
172 unsigned LastQueryLine;
174 /// AssemblerDialect. ~OU means unset value and use value provided by MAI.
175 unsigned AssemblerDialect;
177 /// \brief is Darwin compatibility enabled?
180 /// \brief Are we parsing ms-style inline assembly?
181 bool ParsingInlineAsm;
184 AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
185 const MCAsmInfo &MAI);
186 virtual ~AsmParser();
188 virtual bool Run(bool NoInitialTextSection, bool NoFinalize = false);
190 virtual void addDirectiveHandler(StringRef Directive,
191 ExtensionDirectiveHandler Handler) {
192 ExtensionDirectiveMap[Directive] = Handler;
196 /// @name MCAsmParser Interface
199 virtual SourceMgr &getSourceManager() { return SrcMgr; }
200 virtual MCAsmLexer &getLexer() { return Lexer; }
201 virtual MCContext &getContext() { return Ctx; }
202 virtual MCStreamer &getStreamer() { return Out; }
203 virtual unsigned getAssemblerDialect() {
204 if (AssemblerDialect == ~0U)
205 return MAI.getAssemblerDialect();
207 return AssemblerDialect;
209 virtual void setAssemblerDialect(unsigned i) {
210 AssemblerDialect = i;
213 virtual bool Warning(SMLoc L, const Twine &Msg,
214 ArrayRef<SMRange> Ranges = None);
215 virtual bool Error(SMLoc L, const Twine &Msg,
216 ArrayRef<SMRange> Ranges = None);
218 virtual const AsmToken &Lex();
220 void setParsingInlineAsm(bool V) { ParsingInlineAsm = V; }
221 bool isParsingInlineAsm() { return ParsingInlineAsm; }
223 bool parseMSInlineAsm(void *AsmLoc, std::string &AsmString,
224 unsigned &NumOutputs, unsigned &NumInputs,
225 SmallVectorImpl<std::pair<void *,bool> > &OpDecls,
226 SmallVectorImpl<std::string> &Constraints,
227 SmallVectorImpl<std::string> &Clobbers,
228 const MCInstrInfo *MII,
229 const MCInstPrinter *IP,
230 MCAsmParserSemaCallback &SI);
232 bool parseExpression(const MCExpr *&Res);
233 virtual bool parseExpression(const MCExpr *&Res, SMLoc &EndLoc);
234 virtual bool parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc);
235 virtual bool parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc);
236 virtual bool parseAbsoluteExpression(int64_t &Res);
238 /// \brief Parse an identifier or string (as a quoted identifier)
239 /// and set \p Res to the identifier contents.
240 virtual bool parseIdentifier(StringRef &Res);
241 virtual void eatToEndOfStatement();
243 virtual void checkForValidSection();
248 bool parseStatement(ParseStatementInfo &Info);
249 void eatToEndOfLine();
250 bool parseCppHashLineFilenameComment(const SMLoc &L);
252 void checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, StringRef Body,
253 MCAsmMacroParameters Parameters);
254 bool expandMacro(raw_svector_ostream &OS, StringRef Body,
255 const MCAsmMacroParameters &Parameters,
256 const MCAsmMacroArguments &A,
259 /// \brief Are macros enabled in the parser?
260 bool areMacrosEnabled() {return MacrosEnabledFlag;}
262 /// \brief Control a flag in the parser that enables or disables macros.
263 void setMacrosEnabled(bool Flag) {MacrosEnabledFlag = Flag;}
265 /// \brief Lookup a previously defined macro.
266 /// \param Name Macro name.
267 /// \returns Pointer to macro. NULL if no such macro was defined.
268 const MCAsmMacro* lookupMacro(StringRef Name);
270 /// \brief Define a new macro with the given name and information.
271 void defineMacro(StringRef Name, const MCAsmMacro& Macro);
273 /// \brief Undefine a macro. If no such macro was defined, it's a no-op.
274 void undefineMacro(StringRef Name);
276 /// \brief Are we inside a macro instantiation?
277 bool isInsideMacroInstantiation() {return !ActiveMacros.empty();}
279 /// \brief Handle entry to macro instantiation.
281 /// \param M The macro.
282 /// \param NameLoc Instantiation location.
283 bool handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc);
285 /// \brief Handle exit from macro instantiation.
286 void handleMacroExit();
288 /// \brief Extract AsmTokens for a macro argument. If the argument delimiter
289 /// is initially unknown, set it to AsmToken::Eof. It will be set to the
290 /// correct delimiter by the method.
291 bool parseMacroArgument(MCAsmMacroArgument &MA,
292 AsmToken::TokenKind &ArgumentDelimiter);
294 /// \brief Parse all macro arguments for a given macro.
295 bool parseMacroArguments(const MCAsmMacro *M, MCAsmMacroArguments &A);
297 void printMacroInstantiations();
298 void printMessage(SMLoc Loc, SourceMgr::DiagKind Kind, const Twine &Msg,
299 ArrayRef<SMRange> Ranges = None) const {
300 SrcMgr.PrintMessage(Loc, Kind, Msg, Ranges);
302 static void DiagHandler(const SMDiagnostic &Diag, void *Context);
304 /// \brief Enter the specified file. This returns true on failure.
305 bool enterIncludeFile(const std::string &Filename);
307 /// \brief Process the specified file for the .incbin directive.
308 /// This returns true on failure.
309 bool processIncbinFile(const std::string &Filename);
311 /// \brief Reset the current lexer position to that given by \p Loc. The
312 /// current token is not set; clients should ensure Lex() is called
315 /// \param InBuffer If not -1, should be the known buffer id that contains the
317 void jumpToLoc(SMLoc Loc, int InBuffer=-1);
319 /// \brief Parse up to the end of statement and a return the contents from the
320 /// current token until the end of the statement; the current token on exit
321 /// will be either the EndOfStatement or EOF.
322 virtual StringRef parseStringToEndOfStatement();
324 /// \brief Parse until the end of a statement or a comma is encountered,
325 /// return the contents from the current token up to the end or comma.
326 StringRef parseStringToComma();
328 bool parseAssignment(StringRef Name, bool allow_redef,
329 bool NoDeadStrip = false);
331 bool parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc);
332 bool parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc);
333 bool parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc);
335 bool parseRegisterOrRegisterNumber(int64_t &Register, SMLoc DirectiveLoc);
337 // Generic (target and platform independent) directive parsing.
339 DK_NO_DIRECTIVE, // Placeholder
340 DK_SET, DK_EQU, DK_EQUIV, DK_ASCII, DK_ASCIZ, DK_STRING, DK_BYTE, DK_SHORT,
341 DK_VALUE, DK_2BYTE, DK_LONG, DK_INT, DK_4BYTE, DK_QUAD, DK_8BYTE, DK_SINGLE,
342 DK_FLOAT, DK_DOUBLE, DK_ALIGN, DK_ALIGN32, DK_BALIGN, DK_BALIGNW,
343 DK_BALIGNL, DK_P2ALIGN, DK_P2ALIGNW, DK_P2ALIGNL, DK_ORG, DK_FILL, DK_ENDR,
344 DK_BUNDLE_ALIGN_MODE, DK_BUNDLE_LOCK, DK_BUNDLE_UNLOCK,
345 DK_ZERO, DK_EXTERN, DK_GLOBL, DK_GLOBAL,
346 DK_LAZY_REFERENCE, DK_NO_DEAD_STRIP, DK_SYMBOL_RESOLVER, DK_PRIVATE_EXTERN,
347 DK_REFERENCE, DK_WEAK_DEFINITION, DK_WEAK_REFERENCE,
348 DK_WEAK_DEF_CAN_BE_HIDDEN, DK_COMM, DK_COMMON, DK_LCOMM, DK_ABORT,
349 DK_INCLUDE, DK_INCBIN, DK_CODE16, DK_CODE16GCC, DK_REPT, DK_IRP, DK_IRPC,
350 DK_IF, DK_IFB, DK_IFNB, DK_IFC, DK_IFNC, DK_IFDEF, DK_IFNDEF, DK_IFNOTDEF,
351 DK_ELSEIF, DK_ELSE, DK_ENDIF,
352 DK_SPACE, DK_SKIP, DK_FILE, DK_LINE, DK_LOC, DK_STABS,
353 DK_CFI_SECTIONS, DK_CFI_STARTPROC, DK_CFI_ENDPROC, DK_CFI_DEF_CFA,
354 DK_CFI_DEF_CFA_OFFSET, DK_CFI_ADJUST_CFA_OFFSET, DK_CFI_DEF_CFA_REGISTER,
355 DK_CFI_OFFSET, DK_CFI_REL_OFFSET, DK_CFI_PERSONALITY, DK_CFI_LSDA,
356 DK_CFI_REMEMBER_STATE, DK_CFI_RESTORE_STATE, DK_CFI_SAME_VALUE,
357 DK_CFI_RESTORE, DK_CFI_ESCAPE, DK_CFI_SIGNAL_FRAME, DK_CFI_UNDEFINED,
358 DK_CFI_REGISTER, DK_CFI_WINDOW_SAVE,
359 DK_MACROS_ON, DK_MACROS_OFF, DK_MACRO, DK_ENDM, DK_ENDMACRO, DK_PURGEM,
360 DK_SLEB128, DK_ULEB128
363 /// \brief Maps directive name --> DirectiveKind enum, for
364 /// directives parsed by this class.
365 StringMap<DirectiveKind> DirectiveKindMap;
367 // ".ascii", ".asciz", ".string"
368 bool parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated);
369 bool parseDirectiveValue(unsigned Size); // ".byte", ".long", ...
370 bool parseDirectiveRealValue(const fltSemantics &); // ".single", ...
371 bool parseDirectiveFill(); // ".fill"
372 bool parseDirectiveZero(); // ".zero"
373 // ".set", ".equ", ".equiv"
374 bool parseDirectiveSet(StringRef IDVal, bool allow_redef);
375 bool parseDirectiveOrg(); // ".org"
376 // ".align{,32}", ".p2align{,w,l}"
377 bool parseDirectiveAlign(bool IsPow2, unsigned ValueSize);
379 // ".file", ".line", ".loc", ".stabs"
380 bool parseDirectiveFile(SMLoc DirectiveLoc);
381 bool parseDirectiveLine();
382 bool parseDirectiveLoc();
383 bool parseDirectiveStabs();
386 bool parseDirectiveCFIRegister(SMLoc DirectiveLoc);
387 bool parseDirectiveCFIWindowSave();
388 bool parseDirectiveCFISections();
389 bool parseDirectiveCFIStartProc();
390 bool parseDirectiveCFIEndProc();
391 bool parseDirectiveCFIDefCfaOffset();
392 bool parseDirectiveCFIDefCfa(SMLoc DirectiveLoc);
393 bool parseDirectiveCFIAdjustCfaOffset();
394 bool parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc);
395 bool parseDirectiveCFIOffset(SMLoc DirectiveLoc);
396 bool parseDirectiveCFIRelOffset(SMLoc DirectiveLoc);
397 bool parseDirectiveCFIPersonalityOrLsda(bool IsPersonality);
398 bool parseDirectiveCFIRememberState();
399 bool parseDirectiveCFIRestoreState();
400 bool parseDirectiveCFISameValue(SMLoc DirectiveLoc);
401 bool parseDirectiveCFIRestore(SMLoc DirectiveLoc);
402 bool parseDirectiveCFIEscape();
403 bool parseDirectiveCFISignalFrame();
404 bool parseDirectiveCFIUndefined(SMLoc DirectiveLoc);
407 bool parseDirectivePurgeMacro(SMLoc DirectiveLoc);
408 bool parseDirectiveEndMacro(StringRef Directive);
409 bool parseDirectiveMacro(SMLoc DirectiveLoc);
410 bool parseDirectiveMacrosOnOff(StringRef Directive);
412 // ".bundle_align_mode"
413 bool parseDirectiveBundleAlignMode();
415 bool parseDirectiveBundleLock();
417 bool parseDirectiveBundleUnlock();
420 bool parseDirectiveSpace(StringRef IDVal);
422 // .sleb128 (Signed=true) and .uleb128 (Signed=false)
423 bool parseDirectiveLEB128(bool Signed);
425 /// \brief Parse a directive like ".globl" which
426 /// accepts a single symbol (which should be a label or an external).
427 bool parseDirectiveSymbolAttribute(MCSymbolAttr Attr);
429 bool parseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm"
431 bool parseDirectiveAbort(); // ".abort"
432 bool parseDirectiveInclude(); // ".include"
433 bool parseDirectiveIncbin(); // ".incbin"
435 bool parseDirectiveIf(SMLoc DirectiveLoc); // ".if"
436 // ".ifb" or ".ifnb", depending on ExpectBlank.
437 bool parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank);
438 // ".ifc" or ".ifnc", depending on ExpectEqual.
439 bool parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual);
440 // ".ifdef" or ".ifndef", depending on expect_defined
441 bool parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined);
442 bool parseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif"
443 bool parseDirectiveElse(SMLoc DirectiveLoc); // ".else"
444 bool parseDirectiveEndIf(SMLoc DirectiveLoc); // .endif
445 virtual bool parseEscapedString(std::string &Data);
447 const MCExpr *applyModifierToExpr(const MCExpr *E,
448 MCSymbolRefExpr::VariantKind Variant);
450 // Macro-like directives
451 MCAsmMacro *parseMacroLikeBody(SMLoc DirectiveLoc);
452 void instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
453 raw_svector_ostream &OS);
454 bool parseDirectiveRept(SMLoc DirectiveLoc); // ".rept"
455 bool parseDirectiveIrp(SMLoc DirectiveLoc); // ".irp"
456 bool parseDirectiveIrpc(SMLoc DirectiveLoc); // ".irpc"
457 bool parseDirectiveEndr(SMLoc DirectiveLoc); // ".endr"
459 // "_emit" or "__emit"
460 bool parseDirectiveMSEmit(SMLoc DirectiveLoc, ParseStatementInfo &Info,
464 bool parseDirectiveMSAlign(SMLoc DirectiveLoc, ParseStatementInfo &Info);
466 void initializeDirectiveKindMap();
472 extern MCAsmParserExtension *createDarwinAsmParser();
473 extern MCAsmParserExtension *createELFAsmParser();
474 extern MCAsmParserExtension *createCOFFAsmParser();
478 enum { DEFAULT_ADDRSPACE = 0 };
480 AsmParser::AsmParser(SourceMgr &_SM, MCContext &_Ctx, MCStreamer &_Out,
481 const MCAsmInfo &_MAI)
482 : Lexer(_MAI), Ctx(_Ctx), Out(_Out), MAI(_MAI), SrcMgr(_SM),
483 PlatformParser(0), CurBuffer(0), MacrosEnabledFlag(true),
484 CppHashLineNumber(0), AssemblerDialect(~0U), IsDarwin(false),
485 ParsingInlineAsm(false) {
486 // Save the old handler.
487 SavedDiagHandler = SrcMgr.getDiagHandler();
488 SavedDiagContext = SrcMgr.getDiagContext();
489 // Set our own handler which calls the saved handler.
490 SrcMgr.setDiagHandler(DiagHandler, this);
491 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
493 // Initialize the platform / file format parser.
495 // FIXME: This is a hack, we need to (majorly) cleanup how these objects are
497 if (_MAI.hasMicrosoftFastStdCallMangling()) {
498 PlatformParser = createCOFFAsmParser();
499 PlatformParser->Initialize(*this);
500 } else if (_MAI.hasSubsectionsViaSymbols()) {
501 PlatformParser = createDarwinAsmParser();
502 PlatformParser->Initialize(*this);
505 PlatformParser = createELFAsmParser();
506 PlatformParser->Initialize(*this);
509 initializeDirectiveKindMap();
512 AsmParser::~AsmParser() {
513 assert(ActiveMacros.empty() && "Unexpected active macro instantiation!");
515 // Destroy any macros.
516 for (StringMap<MCAsmMacro *>::iterator it = MacroMap.begin(),
519 delete it->getValue();
521 delete PlatformParser;
524 void AsmParser::printMacroInstantiations() {
525 // Print the active macro instantiation stack.
526 for (std::vector<MacroInstantiation *>::const_reverse_iterator
527 it = ActiveMacros.rbegin(),
528 ie = ActiveMacros.rend();
530 printMessage((*it)->InstantiationLoc, SourceMgr::DK_Note,
531 "while in macro instantiation");
534 bool AsmParser::Warning(SMLoc L, const Twine &Msg, ArrayRef<SMRange> Ranges) {
535 if (FatalAssemblerWarnings)
536 return Error(L, Msg, Ranges);
537 printMessage(L, SourceMgr::DK_Warning, Msg, Ranges);
538 printMacroInstantiations();
542 bool AsmParser::Error(SMLoc L, const Twine &Msg, ArrayRef<SMRange> Ranges) {
544 printMessage(L, SourceMgr::DK_Error, Msg, Ranges);
545 printMacroInstantiations();
549 bool AsmParser::enterIncludeFile(const std::string &Filename) {
550 std::string IncludedFile;
551 int NewBuf = SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
557 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
562 /// Process the specified .incbin file by searching for it in the include paths
563 /// then just emitting the byte contents of the file to the streamer. This
564 /// returns true on failure.
565 bool AsmParser::processIncbinFile(const std::string &Filename) {
566 std::string IncludedFile;
567 int NewBuf = SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
571 // Pick up the bytes from the file and emit them.
572 getStreamer().EmitBytes(SrcMgr.getMemoryBuffer(NewBuf)->getBuffer());
576 void AsmParser::jumpToLoc(SMLoc Loc, int InBuffer) {
577 if (InBuffer != -1) {
578 CurBuffer = InBuffer;
580 CurBuffer = SrcMgr.FindBufferContainingLoc(Loc);
582 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer), Loc.getPointer());
585 const AsmToken &AsmParser::Lex() {
586 const AsmToken *tok = &Lexer.Lex();
588 if (tok->is(AsmToken::Eof)) {
589 // If this is the end of an included file, pop the parent file off the
591 SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer);
592 if (ParentIncludeLoc != SMLoc()) {
593 jumpToLoc(ParentIncludeLoc);
598 if (tok->is(AsmToken::Error))
599 Error(Lexer.getErrLoc(), Lexer.getErr());
604 bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) {
605 // Create the initial section, if requested.
606 if (!NoInitialTextSection)
613 AsmCond StartingCondState = TheCondState;
615 // If we are generating dwarf for assembly source files save the initial text
616 // section and generate a .file directive.
617 if (getContext().getGenDwarfForAssembly()) {
618 getContext().setGenDwarfSection(getStreamer().getCurrentSection().first);
619 MCSymbol *SectionStartSym = getContext().CreateTempSymbol();
620 getStreamer().EmitLabel(SectionStartSym);
621 getContext().setGenDwarfSectionStartSym(SectionStartSym);
622 getStreamer().EmitDwarfFileDirective(getContext().nextGenDwarfFileNumber(),
624 getContext().getMainFileName());
627 // While we have input, parse each statement.
628 while (Lexer.isNot(AsmToken::Eof)) {
629 ParseStatementInfo Info;
630 if (!parseStatement(Info))
633 // We had an error, validate that one was emitted and recover by skipping to
635 assert(HadError && "Parse statement returned an error, but none emitted!");
636 eatToEndOfStatement();
639 if (TheCondState.TheCond != StartingCondState.TheCond ||
640 TheCondState.Ignore != StartingCondState.Ignore)
641 return TokError("unmatched .ifs or .elses");
643 // Check to see there are no empty DwarfFile slots.
644 const SmallVectorImpl<MCDwarfFile *> &MCDwarfFiles =
645 getContext().getMCDwarfFiles();
646 for (unsigned i = 1; i < MCDwarfFiles.size(); i++) {
647 if (!MCDwarfFiles[i])
648 TokError("unassigned file number: " + Twine(i) + " for .file directives");
651 // Check to see that all assembler local symbols were actually defined.
652 // Targets that don't do subsections via symbols may not want this, though,
653 // so conservatively exclude them. Only do this if we're finalizing, though,
654 // as otherwise we won't necessarilly have seen everything yet.
655 if (!NoFinalize && MAI.hasSubsectionsViaSymbols()) {
656 const MCContext::SymbolTable &Symbols = getContext().getSymbols();
657 for (MCContext::SymbolTable::const_iterator i = Symbols.begin(),
660 MCSymbol *Sym = i->getValue();
661 // Variable symbols may not be marked as defined, so check those
662 // explicitly. If we know it's a variable, we have a definition for
663 // the purposes of this check.
664 if (Sym->isTemporary() && !Sym->isVariable() && !Sym->isDefined())
665 // FIXME: We would really like to refer back to where the symbol was
666 // first referenced for a source location. We need to add something
667 // to track that. Currently, we just point to the end of the file.
669 getLexer().getLoc(), SourceMgr::DK_Error,
670 "assembler local symbol '" + Sym->getName() + "' not defined");
674 // Finalize the output stream if there are no errors and if the client wants
676 if (!HadError && !NoFinalize)
682 void AsmParser::checkForValidSection() {
683 if (!ParsingInlineAsm && !getStreamer().getCurrentSection().first) {
684 TokError("expected section directive before assembly directive");
685 Out.InitToTextSection();
689 /// \brief Throw away the rest of the line for testing purposes.
690 void AsmParser::eatToEndOfStatement() {
691 while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof))
695 if (Lexer.is(AsmToken::EndOfStatement))
699 StringRef AsmParser::parseStringToEndOfStatement() {
700 const char *Start = getTok().getLoc().getPointer();
702 while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof))
705 const char *End = getTok().getLoc().getPointer();
706 return StringRef(Start, End - Start);
709 StringRef AsmParser::parseStringToComma() {
710 const char *Start = getTok().getLoc().getPointer();
712 while (Lexer.isNot(AsmToken::EndOfStatement) &&
713 Lexer.isNot(AsmToken::Comma) && Lexer.isNot(AsmToken::Eof))
716 const char *End = getTok().getLoc().getPointer();
717 return StringRef(Start, End - Start);
720 /// \brief Parse a paren expression and return it.
721 /// NOTE: This assumes the leading '(' has already been consumed.
723 /// parenexpr ::= expr)
725 bool AsmParser::parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc) {
726 if (parseExpression(Res))
728 if (Lexer.isNot(AsmToken::RParen))
729 return TokError("expected ')' in parentheses expression");
730 EndLoc = Lexer.getTok().getEndLoc();
735 /// \brief Parse a bracket expression and return it.
736 /// NOTE: This assumes the leading '[' has already been consumed.
738 /// bracketexpr ::= expr]
740 bool AsmParser::parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc) {
741 if (parseExpression(Res))
743 if (Lexer.isNot(AsmToken::RBrac))
744 return TokError("expected ']' in brackets expression");
745 EndLoc = Lexer.getTok().getEndLoc();
750 /// \brief Parse a primary expression and return it.
751 /// primaryexpr ::= (parenexpr
752 /// primaryexpr ::= symbol
753 /// primaryexpr ::= number
754 /// primaryexpr ::= '.'
755 /// primaryexpr ::= ~,+,- primaryexpr
756 bool AsmParser::parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) {
757 SMLoc FirstTokenLoc = getLexer().getLoc();
758 AsmToken::TokenKind FirstTokenKind = Lexer.getKind();
759 switch (FirstTokenKind) {
761 return TokError("unknown token in expression");
762 // If we have an error assume that we've already handled it.
763 case AsmToken::Error:
765 case AsmToken::Exclaim:
766 Lex(); // Eat the operator.
767 if (parsePrimaryExpr(Res, EndLoc))
769 Res = MCUnaryExpr::CreateLNot(Res, getContext());
771 case AsmToken::Dollar:
772 case AsmToken::String:
773 case AsmToken::Identifier: {
774 StringRef Identifier;
775 if (parseIdentifier(Identifier)) {
776 if (FirstTokenKind == AsmToken::Dollar) {
777 if (Lexer.getMAI().getDollarIsPC()) {
778 // This is a '$' reference, which references the current PC. Emit a
779 // temporary label to the streamer and refer to it.
780 MCSymbol *Sym = Ctx.CreateTempSymbol();
782 Res = MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_None,
784 EndLoc = FirstTokenLoc;
787 return Error(FirstTokenLoc, "invalid token in expression");
792 EndLoc = SMLoc::getFromPointer(Identifier.end());
794 // This is a symbol reference.
795 std::pair<StringRef, StringRef> Split = Identifier.split('@');
796 MCSymbol *Sym = getContext().GetOrCreateSymbol(Split.first);
798 // Lookup the symbol variant if used.
799 MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
800 if (Split.first.size() != Identifier.size()) {
801 Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
802 if (Variant == MCSymbolRefExpr::VK_Invalid) {
803 Variant = MCSymbolRefExpr::VK_None;
804 return TokError("invalid variant '" + Split.second + "'");
808 // If this is an absolute variable reference, substitute it now to preserve
809 // semantics in the face of reassignment.
810 if (Sym->isVariable() && isa<MCConstantExpr>(Sym->getVariableValue())) {
812 return Error(EndLoc, "unexpected modifier on variable reference");
814 Res = Sym->getVariableValue();
818 // Otherwise create a symbol ref.
819 Res = MCSymbolRefExpr::Create(Sym, Variant, getContext());
822 case AsmToken::Integer: {
823 SMLoc Loc = getTok().getLoc();
824 int64_t IntVal = getTok().getIntVal();
825 Res = MCConstantExpr::Create(IntVal, getContext());
826 EndLoc = Lexer.getTok().getEndLoc();
828 // Look for 'b' or 'f' following an Integer as a directional label
829 if (Lexer.getKind() == AsmToken::Identifier) {
830 StringRef IDVal = getTok().getString();
831 // Lookup the symbol variant if used.
832 std::pair<StringRef, StringRef> Split = IDVal.split('@');
833 MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
834 if (Split.first.size() != IDVal.size()) {
835 Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
836 if (Variant == MCSymbolRefExpr::VK_Invalid) {
837 Variant = MCSymbolRefExpr::VK_None;
838 return TokError("invalid variant '" + Split.second + "'");
842 if (IDVal == "f" || IDVal == "b") {
844 Ctx.GetDirectionalLocalSymbol(IntVal, IDVal == "f" ? 1 : 0);
845 Res = MCSymbolRefExpr::Create(Sym, Variant, getContext());
846 if (IDVal == "b" && Sym->isUndefined())
847 return Error(Loc, "invalid reference to undefined symbol");
848 EndLoc = Lexer.getTok().getEndLoc();
849 Lex(); // Eat identifier.
854 case AsmToken::Real: {
855 APFloat RealVal(APFloat::IEEEdouble, getTok().getString());
856 uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue();
857 Res = MCConstantExpr::Create(IntVal, getContext());
858 EndLoc = Lexer.getTok().getEndLoc();
862 case AsmToken::Dot: {
863 // This is a '.' reference, which references the current PC. Emit a
864 // temporary label to the streamer and refer to it.
865 MCSymbol *Sym = Ctx.CreateTempSymbol();
867 Res = MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_None, getContext());
868 EndLoc = Lexer.getTok().getEndLoc();
869 Lex(); // Eat identifier.
872 case AsmToken::LParen:
873 Lex(); // Eat the '('.
874 return parseParenExpr(Res, EndLoc);
875 case AsmToken::LBrac:
876 if (!PlatformParser->HasBracketExpressions())
877 return TokError("brackets expression not supported on this target");
878 Lex(); // Eat the '['.
879 return parseBracketExpr(Res, EndLoc);
880 case AsmToken::Minus:
881 Lex(); // Eat the operator.
882 if (parsePrimaryExpr(Res, EndLoc))
884 Res = MCUnaryExpr::CreateMinus(Res, getContext());
887 Lex(); // Eat the operator.
888 if (parsePrimaryExpr(Res, EndLoc))
890 Res = MCUnaryExpr::CreatePlus(Res, getContext());
892 case AsmToken::Tilde:
893 Lex(); // Eat the operator.
894 if (parsePrimaryExpr(Res, EndLoc))
896 Res = MCUnaryExpr::CreateNot(Res, getContext());
901 bool AsmParser::parseExpression(const MCExpr *&Res) {
903 return parseExpression(Res, EndLoc);
907 AsmParser::applyModifierToExpr(const MCExpr *E,
908 MCSymbolRefExpr::VariantKind Variant) {
909 // Ask the target implementation about this expression first.
910 const MCExpr *NewE = getTargetParser().applyModifierToExpr(E, Variant, Ctx);
913 // Recurse over the given expression, rebuilding it to apply the given variant
914 // if there is exactly one symbol.
915 switch (E->getKind()) {
917 case MCExpr::Constant:
920 case MCExpr::SymbolRef: {
921 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
923 if (SRE->getKind() != MCSymbolRefExpr::VK_None) {
924 TokError("invalid variant on expression '" + getTok().getIdentifier() +
925 "' (already modified)");
929 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
932 case MCExpr::Unary: {
933 const MCUnaryExpr *UE = cast<MCUnaryExpr>(E);
934 const MCExpr *Sub = applyModifierToExpr(UE->getSubExpr(), Variant);
937 return MCUnaryExpr::Create(UE->getOpcode(), Sub, getContext());
940 case MCExpr::Binary: {
941 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
942 const MCExpr *LHS = applyModifierToExpr(BE->getLHS(), Variant);
943 const MCExpr *RHS = applyModifierToExpr(BE->getRHS(), Variant);
953 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
957 llvm_unreachable("Invalid expression kind!");
960 /// \brief Parse an expression and return it.
962 /// expr ::= expr &&,|| expr -> lowest.
963 /// expr ::= expr |,^,&,! expr
964 /// expr ::= expr ==,!=,<>,<,<=,>,>= expr
965 /// expr ::= expr <<,>> expr
966 /// expr ::= expr +,- expr
967 /// expr ::= expr *,/,% expr -> highest.
968 /// expr ::= primaryexpr
970 bool AsmParser::parseExpression(const MCExpr *&Res, SMLoc &EndLoc) {
971 // Parse the expression.
973 if (parsePrimaryExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc))
976 // As a special case, we support 'a op b @ modifier' by rewriting the
977 // expression to include the modifier. This is inefficient, but in general we
978 // expect users to use 'a@modifier op b'.
979 if (Lexer.getKind() == AsmToken::At) {
982 if (Lexer.isNot(AsmToken::Identifier))
983 return TokError("unexpected symbol modifier following '@'");
985 MCSymbolRefExpr::VariantKind Variant =
986 MCSymbolRefExpr::getVariantKindForName(getTok().getIdentifier());
987 if (Variant == MCSymbolRefExpr::VK_Invalid)
988 return TokError("invalid variant '" + getTok().getIdentifier() + "'");
990 const MCExpr *ModifiedRes = applyModifierToExpr(Res, Variant);
992 return TokError("invalid modifier '" + getTok().getIdentifier() +
993 "' (no symbols present)");
1000 // Try to constant fold it up front, if possible.
1002 if (Res->EvaluateAsAbsolute(Value))
1003 Res = MCConstantExpr::Create(Value, getContext());
1008 bool AsmParser::parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) {
1010 return parseParenExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc);
1013 bool AsmParser::parseAbsoluteExpression(int64_t &Res) {
1016 SMLoc StartLoc = Lexer.getLoc();
1017 if (parseExpression(Expr))
1020 if (!Expr->EvaluateAsAbsolute(Res))
1021 return Error(StartLoc, "expected absolute expression");
1026 static unsigned getBinOpPrecedence(AsmToken::TokenKind K,
1027 MCBinaryExpr::Opcode &Kind) {
1030 return 0; // not a binop.
1032 // Lowest Precedence: &&, ||
1033 case AsmToken::AmpAmp:
1034 Kind = MCBinaryExpr::LAnd;
1036 case AsmToken::PipePipe:
1037 Kind = MCBinaryExpr::LOr;
1040 // Low Precedence: |, &, ^
1042 // FIXME: gas seems to support '!' as an infix operator?
1043 case AsmToken::Pipe:
1044 Kind = MCBinaryExpr::Or;
1046 case AsmToken::Caret:
1047 Kind = MCBinaryExpr::Xor;
1050 Kind = MCBinaryExpr::And;
1053 // Low Intermediate Precedence: ==, !=, <>, <, <=, >, >=
1054 case AsmToken::EqualEqual:
1055 Kind = MCBinaryExpr::EQ;
1057 case AsmToken::ExclaimEqual:
1058 case AsmToken::LessGreater:
1059 Kind = MCBinaryExpr::NE;
1061 case AsmToken::Less:
1062 Kind = MCBinaryExpr::LT;
1064 case AsmToken::LessEqual:
1065 Kind = MCBinaryExpr::LTE;
1067 case AsmToken::Greater:
1068 Kind = MCBinaryExpr::GT;
1070 case AsmToken::GreaterEqual:
1071 Kind = MCBinaryExpr::GTE;
1074 // Intermediate Precedence: <<, >>
1075 case AsmToken::LessLess:
1076 Kind = MCBinaryExpr::Shl;
1078 case AsmToken::GreaterGreater:
1079 Kind = MCBinaryExpr::Shr;
1082 // High Intermediate Precedence: +, -
1083 case AsmToken::Plus:
1084 Kind = MCBinaryExpr::Add;
1086 case AsmToken::Minus:
1087 Kind = MCBinaryExpr::Sub;
1090 // Highest Precedence: *, /, %
1091 case AsmToken::Star:
1092 Kind = MCBinaryExpr::Mul;
1094 case AsmToken::Slash:
1095 Kind = MCBinaryExpr::Div;
1097 case AsmToken::Percent:
1098 Kind = MCBinaryExpr::Mod;
1103 /// \brief Parse all binary operators with precedence >= 'Precedence'.
1104 /// Res contains the LHS of the expression on input.
1105 bool AsmParser::parseBinOpRHS(unsigned Precedence, const MCExpr *&Res,
1108 MCBinaryExpr::Opcode Kind = MCBinaryExpr::Add;
1109 unsigned TokPrec = getBinOpPrecedence(Lexer.getKind(), Kind);
1111 // If the next token is lower precedence than we are allowed to eat, return
1112 // successfully with what we ate already.
1113 if (TokPrec < Precedence)
1118 // Eat the next primary expression.
1120 if (parsePrimaryExpr(RHS, EndLoc))
1123 // If BinOp binds less tightly with RHS than the operator after RHS, let
1124 // the pending operator take RHS as its LHS.
1125 MCBinaryExpr::Opcode Dummy;
1126 unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy);
1127 if (TokPrec < NextTokPrec && parseBinOpRHS(TokPrec + 1, RHS, EndLoc))
1130 // Merge LHS and RHS according to operator.
1131 Res = MCBinaryExpr::Create(Kind, Res, RHS, getContext());
1136 /// ::= EndOfStatement
1137 /// ::= Label* Directive ...Operands... EndOfStatement
1138 /// ::= Label* Identifier OperandList* EndOfStatement
1139 bool AsmParser::parseStatement(ParseStatementInfo &Info) {
1140 if (Lexer.is(AsmToken::EndOfStatement)) {
1146 // Statements always start with an identifier or are a full line comment.
1147 AsmToken ID = getTok();
1148 SMLoc IDLoc = ID.getLoc();
1150 int64_t LocalLabelVal = -1;
1151 // A full line comment is a '#' as the first token.
1152 if (Lexer.is(AsmToken::Hash))
1153 return parseCppHashLineFilenameComment(IDLoc);
1155 // Allow an integer followed by a ':' as a directional local label.
1156 if (Lexer.is(AsmToken::Integer)) {
1157 LocalLabelVal = getTok().getIntVal();
1158 if (LocalLabelVal < 0) {
1159 if (!TheCondState.Ignore)
1160 return TokError("unexpected token at start of statement");
1163 IDVal = getTok().getString();
1164 Lex(); // Consume the integer token to be used as an identifier token.
1165 if (Lexer.getKind() != AsmToken::Colon) {
1166 if (!TheCondState.Ignore)
1167 return TokError("unexpected token at start of statement");
1170 } else if (Lexer.is(AsmToken::Dot)) {
1171 // Treat '.' as a valid identifier in this context.
1174 } else if (parseIdentifier(IDVal)) {
1175 if (!TheCondState.Ignore)
1176 return TokError("unexpected token at start of statement");
1180 // Handle conditional assembly here before checking for skipping. We
1181 // have to do this so that .endif isn't skipped in a ".if 0" block for
1183 StringMap<DirectiveKind>::const_iterator DirKindIt =
1184 DirectiveKindMap.find(IDVal);
1185 DirectiveKind DirKind = (DirKindIt == DirectiveKindMap.end())
1187 : DirKindIt->getValue();
1192 return parseDirectiveIf(IDLoc);
1194 return parseDirectiveIfb(IDLoc, true);
1196 return parseDirectiveIfb(IDLoc, false);
1198 return parseDirectiveIfc(IDLoc, true);
1200 return parseDirectiveIfc(IDLoc, false);
1202 return parseDirectiveIfdef(IDLoc, true);
1205 return parseDirectiveIfdef(IDLoc, false);
1207 return parseDirectiveElseIf(IDLoc);
1209 return parseDirectiveElse(IDLoc);
1211 return parseDirectiveEndIf(IDLoc);
1214 // Ignore the statement if in the middle of inactive conditional
1216 if (TheCondState.Ignore) {
1217 eatToEndOfStatement();
1221 // FIXME: Recurse on local labels?
1223 // See what kind of statement we have.
1224 switch (Lexer.getKind()) {
1225 case AsmToken::Colon: {
1226 checkForValidSection();
1228 // identifier ':' -> Label.
1231 // Diagnose attempt to use '.' as a label.
1233 return Error(IDLoc, "invalid use of pseudo-symbol '.' as a label");
1235 // Diagnose attempt to use a variable as a label.
1237 // FIXME: Diagnostics. Note the location of the definition as a label.
1238 // FIXME: This doesn't diagnose assignment to a symbol which has been
1239 // implicitly marked as external.
1241 if (LocalLabelVal == -1)
1242 Sym = getContext().GetOrCreateSymbol(IDVal);
1244 Sym = Ctx.CreateDirectionalLocalSymbol(LocalLabelVal);
1245 if (!Sym->isUndefined() || Sym->isVariable())
1246 return Error(IDLoc, "invalid symbol redefinition");
1249 if (!ParsingInlineAsm)
1252 // If we are generating dwarf for assembly source files then gather the
1253 // info to make a dwarf label entry for this label if needed.
1254 if (getContext().getGenDwarfForAssembly())
1255 MCGenDwarfLabelEntry::Make(Sym, &getStreamer(), getSourceManager(),
1258 // Consume any end of statement token, if present, to avoid spurious
1259 // AddBlankLine calls().
1260 if (Lexer.is(AsmToken::EndOfStatement)) {
1262 if (Lexer.is(AsmToken::Eof))
1269 case AsmToken::Equal:
1270 // identifier '=' ... -> assignment statement
1273 return parseAssignment(IDVal, true);
1275 default: // Normal instruction or directive.
1279 // If macros are enabled, check to see if this is a macro instantiation.
1280 if (areMacrosEnabled())
1281 if (const MCAsmMacro *M = lookupMacro(IDVal)) {
1282 return handleMacroEntry(M, IDLoc);
1285 // Otherwise, we have a normal instruction or directive.
1287 // Directives start with "."
1288 if (IDVal[0] == '.' && IDVal != ".") {
1289 // There are several entities interested in parsing directives:
1291 // 1. The target-specific assembly parser. Some directives are target
1292 // specific or may potentially behave differently on certain targets.
1293 // 2. Asm parser extensions. For example, platform-specific parsers
1294 // (like the ELF parser) register themselves as extensions.
1295 // 3. The generic directive parser implemented by this class. These are
1296 // all the directives that behave in a target and platform independent
1297 // manner, or at least have a default behavior that's shared between
1298 // all targets and platforms.
1300 // First query the target-specific parser. It will return 'true' if it
1301 // isn't interested in this directive.
1302 if (!getTargetParser().ParseDirective(ID))
1305 // Next, check the extention directive map to see if any extension has
1306 // registered itself to parse this directive.
1307 std::pair<MCAsmParserExtension *, DirectiveHandler> Handler =
1308 ExtensionDirectiveMap.lookup(IDVal);
1310 return (*Handler.second)(Handler.first, IDVal, IDLoc);
1312 // Finally, if no one else is interested in this directive, it must be
1313 // generic and familiar to this class.
1319 return parseDirectiveSet(IDVal, true);
1321 return parseDirectiveSet(IDVal, false);
1323 return parseDirectiveAscii(IDVal, false);
1326 return parseDirectiveAscii(IDVal, true);
1328 return parseDirectiveValue(1);
1332 return parseDirectiveValue(2);
1336 return parseDirectiveValue(4);
1339 return parseDirectiveValue(8);
1342 return parseDirectiveRealValue(APFloat::IEEEsingle);
1344 return parseDirectiveRealValue(APFloat::IEEEdouble);
1346 bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
1347 return parseDirectiveAlign(IsPow2, /*ExprSize=*/1);
1350 bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
1351 return parseDirectiveAlign(IsPow2, /*ExprSize=*/4);
1354 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1);
1356 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2);
1358 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4);
1360 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1);
1362 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2);
1364 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4);
1366 return parseDirectiveOrg();
1368 return parseDirectiveFill();
1370 return parseDirectiveZero();
1372 eatToEndOfStatement(); // .extern is the default, ignore it.
1376 return parseDirectiveSymbolAttribute(MCSA_Global);
1377 case DK_LAZY_REFERENCE:
1378 return parseDirectiveSymbolAttribute(MCSA_LazyReference);
1379 case DK_NO_DEAD_STRIP:
1380 return parseDirectiveSymbolAttribute(MCSA_NoDeadStrip);
1381 case DK_SYMBOL_RESOLVER:
1382 return parseDirectiveSymbolAttribute(MCSA_SymbolResolver);
1383 case DK_PRIVATE_EXTERN:
1384 return parseDirectiveSymbolAttribute(MCSA_PrivateExtern);
1386 return parseDirectiveSymbolAttribute(MCSA_Reference);
1387 case DK_WEAK_DEFINITION:
1388 return parseDirectiveSymbolAttribute(MCSA_WeakDefinition);
1389 case DK_WEAK_REFERENCE:
1390 return parseDirectiveSymbolAttribute(MCSA_WeakReference);
1391 case DK_WEAK_DEF_CAN_BE_HIDDEN:
1392 return parseDirectiveSymbolAttribute(MCSA_WeakDefAutoPrivate);
1395 return parseDirectiveComm(/*IsLocal=*/false);
1397 return parseDirectiveComm(/*IsLocal=*/true);
1399 return parseDirectiveAbort();
1401 return parseDirectiveInclude();
1403 return parseDirectiveIncbin();
1406 return TokError(Twine(IDVal) + " not supported yet");
1408 return parseDirectiveRept(IDLoc);
1410 return parseDirectiveIrp(IDLoc);
1412 return parseDirectiveIrpc(IDLoc);
1414 return parseDirectiveEndr(IDLoc);
1415 case DK_BUNDLE_ALIGN_MODE:
1416 return parseDirectiveBundleAlignMode();
1417 case DK_BUNDLE_LOCK:
1418 return parseDirectiveBundleLock();
1419 case DK_BUNDLE_UNLOCK:
1420 return parseDirectiveBundleUnlock();
1422 return parseDirectiveLEB128(true);
1424 return parseDirectiveLEB128(false);
1427 return parseDirectiveSpace(IDVal);
1429 return parseDirectiveFile(IDLoc);
1431 return parseDirectiveLine();
1433 return parseDirectiveLoc();
1435 return parseDirectiveStabs();
1436 case DK_CFI_SECTIONS:
1437 return parseDirectiveCFISections();
1438 case DK_CFI_STARTPROC:
1439 return parseDirectiveCFIStartProc();
1440 case DK_CFI_ENDPROC:
1441 return parseDirectiveCFIEndProc();
1442 case DK_CFI_DEF_CFA:
1443 return parseDirectiveCFIDefCfa(IDLoc);
1444 case DK_CFI_DEF_CFA_OFFSET:
1445 return parseDirectiveCFIDefCfaOffset();
1446 case DK_CFI_ADJUST_CFA_OFFSET:
1447 return parseDirectiveCFIAdjustCfaOffset();
1448 case DK_CFI_DEF_CFA_REGISTER:
1449 return parseDirectiveCFIDefCfaRegister(IDLoc);
1451 return parseDirectiveCFIOffset(IDLoc);
1452 case DK_CFI_REL_OFFSET:
1453 return parseDirectiveCFIRelOffset(IDLoc);
1454 case DK_CFI_PERSONALITY:
1455 return parseDirectiveCFIPersonalityOrLsda(true);
1457 return parseDirectiveCFIPersonalityOrLsda(false);
1458 case DK_CFI_REMEMBER_STATE:
1459 return parseDirectiveCFIRememberState();
1460 case DK_CFI_RESTORE_STATE:
1461 return parseDirectiveCFIRestoreState();
1462 case DK_CFI_SAME_VALUE:
1463 return parseDirectiveCFISameValue(IDLoc);
1464 case DK_CFI_RESTORE:
1465 return parseDirectiveCFIRestore(IDLoc);
1467 return parseDirectiveCFIEscape();
1468 case DK_CFI_SIGNAL_FRAME:
1469 return parseDirectiveCFISignalFrame();
1470 case DK_CFI_UNDEFINED:
1471 return parseDirectiveCFIUndefined(IDLoc);
1472 case DK_CFI_REGISTER:
1473 return parseDirectiveCFIRegister(IDLoc);
1474 case DK_CFI_WINDOW_SAVE:
1475 return parseDirectiveCFIWindowSave();
1478 return parseDirectiveMacrosOnOff(IDVal);
1480 return parseDirectiveMacro(IDLoc);
1483 return parseDirectiveEndMacro(IDVal);
1485 return parseDirectivePurgeMacro(IDLoc);
1488 return Error(IDLoc, "unknown directive");
1491 // __asm _emit or __asm __emit
1492 if (ParsingInlineAsm && (IDVal == "_emit" || IDVal == "__emit" ||
1493 IDVal == "_EMIT" || IDVal == "__EMIT"))
1494 return parseDirectiveMSEmit(IDLoc, Info, IDVal.size());
1497 if (ParsingInlineAsm && (IDVal == "align" || IDVal == "ALIGN"))
1498 return parseDirectiveMSAlign(IDLoc, Info);
1500 checkForValidSection();
1502 // Canonicalize the opcode to lower case.
1503 std::string OpcodeStr = IDVal.lower();
1504 ParseInstructionInfo IInfo(Info.AsmRewrites);
1505 bool HadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr, IDLoc,
1506 Info.ParsedOperands);
1507 Info.ParseError = HadError;
1509 // Dump the parsed representation, if requested.
1510 if (getShowParsedOperands()) {
1511 SmallString<256> Str;
1512 raw_svector_ostream OS(Str);
1513 OS << "parsed instruction: [";
1514 for (unsigned i = 0; i != Info.ParsedOperands.size(); ++i) {
1517 Info.ParsedOperands[i]->print(OS);
1521 printMessage(IDLoc, SourceMgr::DK_Note, OS.str());
1524 // If we are generating dwarf for assembly source files and the current
1525 // section is the initial text section then generate a .loc directive for
1527 if (!HadError && getContext().getGenDwarfForAssembly() &&
1528 getContext().getGenDwarfSection() ==
1529 getStreamer().getCurrentSection().first) {
1531 unsigned Line = SrcMgr.FindLineNumber(IDLoc, CurBuffer);
1533 // If we previously parsed a cpp hash file line comment then make sure the
1534 // current Dwarf File is for the CppHashFilename if not then emit the
1535 // Dwarf File table for it and adjust the line number for the .loc.
1536 const SmallVectorImpl<MCDwarfFile *> &MCDwarfFiles =
1537 getContext().getMCDwarfFiles();
1538 if (CppHashFilename.size() != 0) {
1539 if (MCDwarfFiles[getContext().getGenDwarfFileNumber()]->getName() !=
1541 getStreamer().EmitDwarfFileDirective(
1542 getContext().nextGenDwarfFileNumber(), StringRef(),
1545 // Since SrcMgr.FindLineNumber() is slow and messes up the SourceMgr's
1546 // cache with the different Loc from the call above we save the last
1547 // info we queried here with SrcMgr.FindLineNumber().
1548 unsigned CppHashLocLineNo;
1549 if (LastQueryIDLoc == CppHashLoc && LastQueryBuffer == CppHashBuf)
1550 CppHashLocLineNo = LastQueryLine;
1552 CppHashLocLineNo = SrcMgr.FindLineNumber(CppHashLoc, CppHashBuf);
1553 LastQueryLine = CppHashLocLineNo;
1554 LastQueryIDLoc = CppHashLoc;
1555 LastQueryBuffer = CppHashBuf;
1557 Line = CppHashLineNumber - 1 + (Line - CppHashLocLineNo);
1560 getStreamer().EmitDwarfLocDirective(
1561 getContext().getGenDwarfFileNumber(), Line, 0,
1562 DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0, 0, 0,
1566 // If parsing succeeded, match the instruction.
1569 HadError = getTargetParser().MatchAndEmitInstruction(
1570 IDLoc, Info.Opcode, Info.ParsedOperands, Out, ErrorInfo,
1574 // Don't skip the rest of the line, the instruction parser is responsible for
1579 /// eatToEndOfLine uses the Lexer to eat the characters to the end of the line
1580 /// since they may not be able to be tokenized to get to the end of line token.
1581 void AsmParser::eatToEndOfLine() {
1582 if (!Lexer.is(AsmToken::EndOfStatement))
1583 Lexer.LexUntilEndOfLine();
1588 /// parseCppHashLineFilenameComment as this:
1589 /// ::= # number "filename"
1590 /// or just as a full line comment if it doesn't have a number and a string.
1591 bool AsmParser::parseCppHashLineFilenameComment(const SMLoc &L) {
1592 Lex(); // Eat the hash token.
1594 if (getLexer().isNot(AsmToken::Integer)) {
1595 // Consume the line since in cases it is not a well-formed line directive,
1596 // as if were simply a full line comment.
1601 int64_t LineNumber = getTok().getIntVal();
1604 if (getLexer().isNot(AsmToken::String)) {
1609 StringRef Filename = getTok().getString();
1610 // Get rid of the enclosing quotes.
1611 Filename = Filename.substr(1, Filename.size() - 2);
1613 // Save the SMLoc, Filename and LineNumber for later use by diagnostics.
1615 CppHashFilename = Filename;
1616 CppHashLineNumber = LineNumber;
1617 CppHashBuf = CurBuffer;
1619 // Ignore any trailing characters, they're just comment.
1624 /// \brief will use the last parsed cpp hash line filename comment
1625 /// for the Filename and LineNo if any in the diagnostic.
1626 void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) {
1627 const AsmParser *Parser = static_cast<const AsmParser *>(Context);
1628 raw_ostream &OS = errs();
1630 const SourceMgr &DiagSrcMgr = *Diag.getSourceMgr();
1631 const SMLoc &DiagLoc = Diag.getLoc();
1632 int DiagBuf = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
1633 int CppHashBuf = Parser->SrcMgr.FindBufferContainingLoc(Parser->CppHashLoc);
1635 // Like SourceMgr::printMessage() we need to print the include stack if any
1636 // before printing the message.
1637 int DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
1638 if (!Parser->SavedDiagHandler && DiagCurBuffer > 0) {
1639 SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(DiagCurBuffer);
1640 DiagSrcMgr.PrintIncludeStack(ParentIncludeLoc, OS);
1643 // If we have not parsed a cpp hash line filename comment or the source
1644 // manager changed or buffer changed (like in a nested include) then just
1645 // print the normal diagnostic using its Filename and LineNo.
1646 if (!Parser->CppHashLineNumber || &DiagSrcMgr != &Parser->SrcMgr ||
1647 DiagBuf != CppHashBuf) {
1648 if (Parser->SavedDiagHandler)
1649 Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
1655 // Use the CppHashFilename and calculate a line number based on the
1656 // CppHashLoc and CppHashLineNumber relative to this Diag's SMLoc for
1658 const std::string &Filename = Parser->CppHashFilename;
1660 int DiagLocLineNo = DiagSrcMgr.FindLineNumber(DiagLoc, DiagBuf);
1661 int CppHashLocLineNo =
1662 Parser->SrcMgr.FindLineNumber(Parser->CppHashLoc, CppHashBuf);
1664 Parser->CppHashLineNumber - 1 + (DiagLocLineNo - CppHashLocLineNo);
1666 SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(), Filename, LineNo,
1667 Diag.getColumnNo(), Diag.getKind(), Diag.getMessage(),
1668 Diag.getLineContents(), Diag.getRanges());
1670 if (Parser->SavedDiagHandler)
1671 Parser->SavedDiagHandler(NewDiag, Parser->SavedDiagContext);
1673 NewDiag.print(0, OS);
1676 // FIXME: This is mostly duplicated from the function in AsmLexer.cpp. The
1677 // difference being that that function accepts '@' as part of identifiers and
1678 // we can't do that. AsmLexer.cpp should probably be changed to handle
1679 // '@' as a special case when needed.
1680 static bool isIdentifierChar(char c) {
1681 return isalnum(static_cast<unsigned char>(c)) || c == '_' || c == '$' ||
1685 bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body,
1686 const MCAsmMacroParameters &Parameters,
1687 const MCAsmMacroArguments &A, const SMLoc &L) {
1688 unsigned NParameters = Parameters.size();
1689 if (NParameters != 0 && NParameters != A.size())
1690 return Error(L, "Wrong number of arguments");
1692 // A macro without parameters is handled differently on Darwin:
1693 // gas accepts no arguments and does no substitutions
1694 while (!Body.empty()) {
1695 // Scan for the next substitution.
1696 std::size_t End = Body.size(), Pos = 0;
1697 for (; Pos != End; ++Pos) {
1698 // Check for a substitution or escape.
1700 // This macro has no parameters, look for $0, $1, etc.
1701 if (Body[Pos] != '$' || Pos + 1 == End)
1704 char Next = Body[Pos + 1];
1705 if (Next == '$' || Next == 'n' ||
1706 isdigit(static_cast<unsigned char>(Next)))
1709 // This macro has parameters, look for \foo, \bar, etc.
1710 if (Body[Pos] == '\\' && Pos + 1 != End)
1716 OS << Body.slice(0, Pos);
1718 // Check if we reached the end.
1723 switch (Body[Pos + 1]) {
1729 // $n => number of arguments
1734 // $[0-9] => argument
1736 // Missing arguments are ignored.
1737 unsigned Index = Body[Pos + 1] - '0';
1738 if (Index >= A.size())
1741 // Otherwise substitute with the token values, with spaces eliminated.
1742 for (MCAsmMacroArgument::const_iterator it = A[Index].begin(),
1743 ie = A[Index].end();
1745 OS << it->getString();
1751 unsigned I = Pos + 1;
1752 while (isIdentifierChar(Body[I]) && I + 1 != End)
1755 const char *Begin = Body.data() + Pos + 1;
1756 StringRef Argument(Begin, I - (Pos + 1));
1758 for (; Index < NParameters; ++Index)
1759 if (Parameters[Index].first == Argument)
1762 if (Index == NParameters) {
1763 if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
1766 OS << '\\' << Argument;
1770 for (MCAsmMacroArgument::const_iterator it = A[Index].begin(),
1771 ie = A[Index].end();
1773 if (it->getKind() == AsmToken::String)
1774 OS << it->getStringContents();
1776 OS << it->getString();
1778 Pos += 1 + Argument.size();
1781 // Update the scan point.
1782 Body = Body.substr(Pos);
1788 MacroInstantiation::MacroInstantiation(const MCAsmMacro *M, SMLoc IL, int EB,
1789 SMLoc EL, MemoryBuffer *I)
1790 : TheMacro(M), Instantiation(I), InstantiationLoc(IL), ExitBuffer(EB),
1793 static bool isOperator(AsmToken::TokenKind kind) {
1797 case AsmToken::Plus:
1798 case AsmToken::Minus:
1799 case AsmToken::Tilde:
1800 case AsmToken::Slash:
1801 case AsmToken::Star:
1803 case AsmToken::Equal:
1804 case AsmToken::EqualEqual:
1805 case AsmToken::Pipe:
1806 case AsmToken::PipePipe:
1807 case AsmToken::Caret:
1809 case AsmToken::AmpAmp:
1810 case AsmToken::Exclaim:
1811 case AsmToken::ExclaimEqual:
1812 case AsmToken::Percent:
1813 case AsmToken::Less:
1814 case AsmToken::LessEqual:
1815 case AsmToken::LessLess:
1816 case AsmToken::LessGreater:
1817 case AsmToken::Greater:
1818 case AsmToken::GreaterEqual:
1819 case AsmToken::GreaterGreater:
1824 bool AsmParser::parseMacroArgument(MCAsmMacroArgument &MA,
1825 AsmToken::TokenKind &ArgumentDelimiter) {
1826 unsigned ParenLevel = 0;
1827 unsigned AddTokens = 0;
1829 // gas accepts arguments separated by whitespace, except on Darwin
1831 Lexer.setSkipSpace(false);
1834 if (Lexer.is(AsmToken::Eof) || Lexer.is(AsmToken::Equal)) {
1835 Lexer.setSkipSpace(true);
1836 return TokError("unexpected token in macro instantiation");
1839 if (ParenLevel == 0 && Lexer.is(AsmToken::Comma)) {
1840 // Spaces and commas cannot be mixed to delimit parameters
1841 if (ArgumentDelimiter == AsmToken::Eof)
1842 ArgumentDelimiter = AsmToken::Comma;
1843 else if (ArgumentDelimiter != AsmToken::Comma) {
1844 Lexer.setSkipSpace(true);
1845 return TokError("expected ' ' for macro argument separator");
1850 if (Lexer.is(AsmToken::Space)) {
1851 Lex(); // Eat spaces
1853 // Spaces can delimit parameters, but could also be part an expression.
1854 // If the token after a space is an operator, add the token and the next
1855 // one into this argument
1856 if (ArgumentDelimiter == AsmToken::Space ||
1857 ArgumentDelimiter == AsmToken::Eof) {
1858 if (isOperator(Lexer.getKind())) {
1859 // Check to see whether the token is used as an operator,
1860 // or part of an identifier
1861 const char *NextChar = getTok().getEndLoc().getPointer();
1862 if (*NextChar == ' ')
1866 if (!AddTokens && ParenLevel == 0) {
1867 if (ArgumentDelimiter == AsmToken::Eof &&
1868 !isOperator(Lexer.getKind()))
1869 ArgumentDelimiter = AsmToken::Space;
1875 // handleMacroEntry relies on not advancing the lexer here
1876 // to be able to fill in the remaining default parameter values
1877 if (Lexer.is(AsmToken::EndOfStatement))
1880 // Adjust the current parentheses level.
1881 if (Lexer.is(AsmToken::LParen))
1883 else if (Lexer.is(AsmToken::RParen) && ParenLevel)
1886 // Append the token to the current argument list.
1887 MA.push_back(getTok());
1893 Lexer.setSkipSpace(true);
1894 if (ParenLevel != 0)
1895 return TokError("unbalanced parentheses in macro argument");
1899 // Parse the macro instantiation arguments.
1900 bool AsmParser::parseMacroArguments(const MCAsmMacro *M,
1901 MCAsmMacroArguments &A) {
1902 const unsigned NParameters = M ? M->Parameters.size() : 0;
1903 // Argument delimiter is initially unknown. It will be set by
1904 // parseMacroArgument()
1905 AsmToken::TokenKind ArgumentDelimiter = AsmToken::Eof;
1907 // Parse two kinds of macro invocations:
1908 // - macros defined without any parameters accept an arbitrary number of them
1909 // - macros defined with parameters accept at most that many of them
1910 for (unsigned Parameter = 0; !NParameters || Parameter < NParameters;
1912 MCAsmMacroArgument MA;
1914 if (parseMacroArgument(MA, ArgumentDelimiter))
1917 if (!MA.empty() || !NParameters)
1919 else if (NParameters) {
1920 if (!M->Parameters[Parameter].second.empty())
1921 A.push_back(M->Parameters[Parameter].second);
1924 // At the end of the statement, fill in remaining arguments that have
1925 // default values. If there aren't any, then the next argument is
1926 // required but missing
1927 if (Lexer.is(AsmToken::EndOfStatement)) {
1928 if (NParameters && Parameter < NParameters - 1) {
1929 if (M->Parameters[Parameter + 1].second.empty())
1930 return TokError("macro argument '" +
1931 Twine(M->Parameters[Parameter + 1].first) +
1939 if (Lexer.is(AsmToken::Comma))
1942 return TokError("Too many arguments");
1945 const MCAsmMacro *AsmParser::lookupMacro(StringRef Name) {
1946 StringMap<MCAsmMacro *>::iterator I = MacroMap.find(Name);
1947 return (I == MacroMap.end()) ? NULL : I->getValue();
1950 void AsmParser::defineMacro(StringRef Name, const MCAsmMacro &Macro) {
1951 MacroMap[Name] = new MCAsmMacro(Macro);
1954 void AsmParser::undefineMacro(StringRef Name) {
1955 StringMap<MCAsmMacro *>::iterator I = MacroMap.find(Name);
1956 if (I != MacroMap.end()) {
1957 delete I->getValue();
1962 bool AsmParser::handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc) {
1963 // Arbitrarily limit macro nesting depth, to match 'as'. We can eliminate
1964 // this, although we should protect against infinite loops.
1965 if (ActiveMacros.size() == 20)
1966 return TokError("macros cannot be nested more than 20 levels deep");
1968 MCAsmMacroArguments A;
1969 if (parseMacroArguments(M, A))
1972 // Remove any trailing empty arguments. Do this after-the-fact as we have
1973 // to keep empty arguments in the middle of the list or positionality
1974 // gets off. e.g., "foo 1, , 2" vs. "foo 1, 2,"
1975 while (!A.empty() && A.back().empty())
1978 // Macro instantiation is lexical, unfortunately. We construct a new buffer
1979 // to hold the macro body with substitutions.
1980 SmallString<256> Buf;
1981 StringRef Body = M->Body;
1982 raw_svector_ostream OS(Buf);
1984 if (expandMacro(OS, Body, M->Parameters, A, getTok().getLoc()))
1987 // We include the .endmacro in the buffer as our cue to exit the macro
1989 OS << ".endmacro\n";
1991 MemoryBuffer *Instantiation =
1992 MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
1994 // Create the macro instantiation object and add to the current macro
1995 // instantiation stack.
1996 MacroInstantiation *MI = new MacroInstantiation(
1997 M, NameLoc, CurBuffer, getTok().getLoc(), Instantiation);
1998 ActiveMacros.push_back(MI);
2000 // Jump to the macro instantiation and prime the lexer.
2001 CurBuffer = SrcMgr.AddNewSourceBuffer(MI->Instantiation, SMLoc());
2002 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
2008 void AsmParser::handleMacroExit() {
2009 // Jump to the EndOfStatement we should return to, and consume it.
2010 jumpToLoc(ActiveMacros.back()->ExitLoc, ActiveMacros.back()->ExitBuffer);
2013 // Pop the instantiation entry.
2014 delete ActiveMacros.back();
2015 ActiveMacros.pop_back();
2018 static bool isUsedIn(const MCSymbol *Sym, const MCExpr *Value) {
2019 switch (Value->getKind()) {
2020 case MCExpr::Binary: {
2021 const MCBinaryExpr *BE = static_cast<const MCBinaryExpr *>(Value);
2022 return isUsedIn(Sym, BE->getLHS()) || isUsedIn(Sym, BE->getRHS());
2024 case MCExpr::Target:
2025 case MCExpr::Constant:
2027 case MCExpr::SymbolRef: {
2029 static_cast<const MCSymbolRefExpr *>(Value)->getSymbol();
2031 return isUsedIn(Sym, S.getVariableValue());
2035 return isUsedIn(Sym, static_cast<const MCUnaryExpr *>(Value)->getSubExpr());
2038 llvm_unreachable("Unknown expr kind!");
2041 bool AsmParser::parseAssignment(StringRef Name, bool allow_redef,
2043 // FIXME: Use better location, we should use proper tokens.
2044 SMLoc EqualLoc = Lexer.getLoc();
2046 const MCExpr *Value;
2047 if (parseExpression(Value))
2050 // Note: we don't count b as used in "a = b". This is to allow
2054 if (Lexer.isNot(AsmToken::EndOfStatement))
2055 return TokError("unexpected token in assignment");
2057 // Error on assignment to '.'.
2059 return Error(EqualLoc, ("assignment to pseudo-symbol '.' is unsupported "
2060 "(use '.space' or '.org').)"));
2063 // Eat the end of statement marker.
2066 // Validate that the LHS is allowed to be a variable (either it has not been
2067 // used as a symbol, or it is an absolute symbol).
2068 MCSymbol *Sym = getContext().LookupSymbol(Name);
2070 // Diagnose assignment to a label.
2072 // FIXME: Diagnostics. Note the location of the definition as a label.
2073 // FIXME: Diagnose assignment to protected identifier (e.g., register name).
2074 if (isUsedIn(Sym, Value))
2075 return Error(EqualLoc, "Recursive use of '" + Name + "'");
2076 else if (Sym->isUndefined() && !Sym->isUsed() && !Sym->isVariable())
2077 ; // Allow redefinitions of undefined symbols only used in directives.
2078 else if (Sym->isVariable() && !Sym->isUsed() && allow_redef)
2079 ; // Allow redefinitions of variables that haven't yet been used.
2080 else if (!Sym->isUndefined() && (!Sym->isVariable() || !allow_redef))
2081 return Error(EqualLoc, "redefinition of '" + Name + "'");
2082 else if (!Sym->isVariable())
2083 return Error(EqualLoc, "invalid assignment to '" + Name + "'");
2084 else if (!isa<MCConstantExpr>(Sym->getVariableValue()))
2085 return Error(EqualLoc, "invalid reassignment of non-absolute variable '" +
2088 // Don't count these checks as uses.
2089 Sym->setUsed(false);
2091 Sym = getContext().GetOrCreateSymbol(Name);
2093 // FIXME: Handle '.'.
2095 // Do the assignment.
2096 Out.EmitAssignment(Sym, Value);
2098 Out.EmitSymbolAttribute(Sym, MCSA_NoDeadStrip);
2103 /// parseIdentifier:
2106 bool AsmParser::parseIdentifier(StringRef &Res) {
2107 // The assembler has relaxed rules for accepting identifiers, in particular we
2108 // allow things like '.globl $foo', which would normally be separate
2109 // tokens. At this level, we have already lexed so we cannot (currently)
2110 // handle this as a context dependent token, instead we detect adjacent tokens
2111 // and return the combined identifier.
2112 if (Lexer.is(AsmToken::Dollar)) {
2113 SMLoc DollarLoc = getLexer().getLoc();
2115 // Consume the dollar sign, and check for a following identifier.
2117 if (Lexer.isNot(AsmToken::Identifier))
2120 // We have a '$' followed by an identifier, make sure they are adjacent.
2121 if (DollarLoc.getPointer() + 1 != getTok().getLoc().getPointer())
2124 // Construct the joined identifier and consume the token.
2126 StringRef(DollarLoc.getPointer(), getTok().getIdentifier().size() + 1);
2131 if (Lexer.isNot(AsmToken::Identifier) && Lexer.isNot(AsmToken::String))
2134 Res = getTok().getIdentifier();
2136 Lex(); // Consume the identifier token.
2141 /// parseDirectiveSet:
2142 /// ::= .equ identifier ',' expression
2143 /// ::= .equiv identifier ',' expression
2144 /// ::= .set identifier ',' expression
2145 bool AsmParser::parseDirectiveSet(StringRef IDVal, bool allow_redef) {
2148 if (parseIdentifier(Name))
2149 return TokError("expected identifier after '" + Twine(IDVal) + "'");
2151 if (getLexer().isNot(AsmToken::Comma))
2152 return TokError("unexpected token in '" + Twine(IDVal) + "'");
2155 return parseAssignment(Name, allow_redef, true);
2158 bool AsmParser::parseEscapedString(std::string &Data) {
2159 assert(getLexer().is(AsmToken::String) && "Unexpected current token!");
2162 StringRef Str = getTok().getStringContents();
2163 for (unsigned i = 0, e = Str.size(); i != e; ++i) {
2164 if (Str[i] != '\\') {
2169 // Recognize escaped characters. Note that this escape semantics currently
2170 // loosely follows Darwin 'as'. Notably, it doesn't support hex escapes.
2173 return TokError("unexpected backslash at end of string");
2175 // Recognize octal sequences.
2176 if ((unsigned)(Str[i] - '0') <= 7) {
2177 // Consume up to three octal characters.
2178 unsigned Value = Str[i] - '0';
2180 if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
2182 Value = Value * 8 + (Str[i] - '0');
2184 if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
2186 Value = Value * 8 + (Str[i] - '0');
2191 return TokError("invalid octal escape sequence (out of range)");
2193 Data += (unsigned char)Value;
2197 // Otherwise recognize individual escapes.
2200 // Just reject invalid escape sequences for now.
2201 return TokError("invalid escape sequence (unrecognized character)");
2203 case 'b': Data += '\b'; break;
2204 case 'f': Data += '\f'; break;
2205 case 'n': Data += '\n'; break;
2206 case 'r': Data += '\r'; break;
2207 case 't': Data += '\t'; break;
2208 case '"': Data += '"'; break;
2209 case '\\': Data += '\\'; break;
2216 /// parseDirectiveAscii:
2217 /// ::= ( .ascii | .asciz | .string ) [ "string" ( , "string" )* ]
2218 bool AsmParser::parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) {
2219 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2220 checkForValidSection();
2223 if (getLexer().isNot(AsmToken::String))
2224 return TokError("expected string in '" + Twine(IDVal) + "' directive");
2227 if (parseEscapedString(Data))
2230 getStreamer().EmitBytes(Data);
2232 getStreamer().EmitBytes(StringRef("\0", 1));
2236 if (getLexer().is(AsmToken::EndOfStatement))
2239 if (getLexer().isNot(AsmToken::Comma))
2240 return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
2249 /// parseDirectiveValue
2250 /// ::= (.byte | .short | ... ) [ expression (, expression)* ]
2251 bool AsmParser::parseDirectiveValue(unsigned Size) {
2252 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2253 checkForValidSection();
2256 const MCExpr *Value;
2257 SMLoc ExprLoc = getLexer().getLoc();
2258 if (parseExpression(Value))
2261 // Special case constant expressions to match code generator.
2262 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
2263 assert(Size <= 8 && "Invalid size");
2264 uint64_t IntValue = MCE->getValue();
2265 if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
2266 return Error(ExprLoc, "literal value out of range for directive");
2267 getStreamer().EmitIntValue(IntValue, Size);
2269 getStreamer().EmitValue(Value, Size);
2271 if (getLexer().is(AsmToken::EndOfStatement))
2274 // FIXME: Improve diagnostic.
2275 if (getLexer().isNot(AsmToken::Comma))
2276 return TokError("unexpected token in directive");
2285 /// parseDirectiveRealValue
2286 /// ::= (.single | .double) [ expression (, expression)* ]
2287 bool AsmParser::parseDirectiveRealValue(const fltSemantics &Semantics) {
2288 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2289 checkForValidSection();
2292 // We don't truly support arithmetic on floating point expressions, so we
2293 // have to manually parse unary prefixes.
2295 if (getLexer().is(AsmToken::Minus)) {
2298 } else if (getLexer().is(AsmToken::Plus))
2301 if (getLexer().isNot(AsmToken::Integer) &&
2302 getLexer().isNot(AsmToken::Real) &&
2303 getLexer().isNot(AsmToken::Identifier))
2304 return TokError("unexpected token in directive");
2306 // Convert to an APFloat.
2307 APFloat Value(Semantics);
2308 StringRef IDVal = getTok().getString();
2309 if (getLexer().is(AsmToken::Identifier)) {
2310 if (!IDVal.compare_lower("infinity") || !IDVal.compare_lower("inf"))
2311 Value = APFloat::getInf(Semantics);
2312 else if (!IDVal.compare_lower("nan"))
2313 Value = APFloat::getNaN(Semantics, false, ~0);
2315 return TokError("invalid floating point literal");
2316 } else if (Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven) ==
2317 APFloat::opInvalidOp)
2318 return TokError("invalid floating point literal");
2322 // Consume the numeric token.
2325 // Emit the value as an integer.
2326 APInt AsInt = Value.bitcastToAPInt();
2327 getStreamer().EmitIntValue(AsInt.getLimitedValue(),
2328 AsInt.getBitWidth() / 8);
2330 if (getLexer().is(AsmToken::EndOfStatement))
2333 if (getLexer().isNot(AsmToken::Comma))
2334 return TokError("unexpected token in directive");
2343 /// parseDirectiveZero
2344 /// ::= .zero expression
2345 bool AsmParser::parseDirectiveZero() {
2346 checkForValidSection();
2349 if (parseAbsoluteExpression(NumBytes))
2353 if (getLexer().is(AsmToken::Comma)) {
2355 if (parseAbsoluteExpression(Val))
2359 if (getLexer().isNot(AsmToken::EndOfStatement))
2360 return TokError("unexpected token in '.zero' directive");
2364 getStreamer().EmitFill(NumBytes, Val);
2369 /// parseDirectiveFill
2370 /// ::= .fill expression [ , expression [ , expression ] ]
2371 bool AsmParser::parseDirectiveFill() {
2372 checkForValidSection();
2375 if (parseAbsoluteExpression(NumValues))
2378 int64_t FillSize = 1;
2379 int64_t FillExpr = 0;
2381 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2382 if (getLexer().isNot(AsmToken::Comma))
2383 return TokError("unexpected token in '.fill' directive");
2386 if (parseAbsoluteExpression(FillSize))
2389 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2390 if (getLexer().isNot(AsmToken::Comma))
2391 return TokError("unexpected token in '.fill' directive");
2394 if (parseAbsoluteExpression(FillExpr))
2397 if (getLexer().isNot(AsmToken::EndOfStatement))
2398 return TokError("unexpected token in '.fill' directive");
2404 if (FillSize != 1 && FillSize != 2 && FillSize != 4 && FillSize != 8)
2405 return TokError("invalid '.fill' size, expected 1, 2, 4, or 8");
2407 for (uint64_t i = 0, e = NumValues; i != e; ++i)
2408 getStreamer().EmitIntValue(FillExpr, FillSize);
2413 /// parseDirectiveOrg
2414 /// ::= .org expression [ , expression ]
2415 bool AsmParser::parseDirectiveOrg() {
2416 checkForValidSection();
2418 const MCExpr *Offset;
2419 SMLoc Loc = getTok().getLoc();
2420 if (parseExpression(Offset))
2423 // Parse optional fill expression.
2424 int64_t FillExpr = 0;
2425 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2426 if (getLexer().isNot(AsmToken::Comma))
2427 return TokError("unexpected token in '.org' directive");
2430 if (parseAbsoluteExpression(FillExpr))
2433 if (getLexer().isNot(AsmToken::EndOfStatement))
2434 return TokError("unexpected token in '.org' directive");
2439 // Only limited forms of relocatable expressions are accepted here, it
2440 // has to be relative to the current section. The streamer will return
2441 // 'true' if the expression wasn't evaluatable.
2442 if (getStreamer().EmitValueToOffset(Offset, FillExpr))
2443 return Error(Loc, "expected assembly-time absolute expression");
2448 /// parseDirectiveAlign
2449 /// ::= {.align, ...} expression [ , expression [ , expression ]]
2450 bool AsmParser::parseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
2451 checkForValidSection();
2453 SMLoc AlignmentLoc = getLexer().getLoc();
2455 if (parseAbsoluteExpression(Alignment))
2459 bool HasFillExpr = false;
2460 int64_t FillExpr = 0;
2461 int64_t MaxBytesToFill = 0;
2462 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2463 if (getLexer().isNot(AsmToken::Comma))
2464 return TokError("unexpected token in directive");
2467 // The fill expression can be omitted while specifying a maximum number of
2468 // alignment bytes, e.g:
2470 if (getLexer().isNot(AsmToken::Comma)) {
2472 if (parseAbsoluteExpression(FillExpr))
2476 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2477 if (getLexer().isNot(AsmToken::Comma))
2478 return TokError("unexpected token in directive");
2481 MaxBytesLoc = getLexer().getLoc();
2482 if (parseAbsoluteExpression(MaxBytesToFill))
2485 if (getLexer().isNot(AsmToken::EndOfStatement))
2486 return TokError("unexpected token in directive");
2495 // Compute alignment in bytes.
2497 // FIXME: Diagnose overflow.
2498 if (Alignment >= 32) {
2499 Error(AlignmentLoc, "invalid alignment value");
2503 Alignment = 1ULL << Alignment;
2505 // Reject alignments that aren't a power of two, for gas compatibility.
2506 if (!isPowerOf2_64(Alignment))
2507 Error(AlignmentLoc, "alignment must be a power of 2");
2510 // Diagnose non-sensical max bytes to align.
2511 if (MaxBytesLoc.isValid()) {
2512 if (MaxBytesToFill < 1) {
2513 Error(MaxBytesLoc, "alignment directive can never be satisfied in this "
2514 "many bytes, ignoring maximum bytes expression");
2518 if (MaxBytesToFill >= Alignment) {
2519 Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and "
2525 // Check whether we should use optimal code alignment for this .align
2527 bool UseCodeAlign = getStreamer().getCurrentSection().first->UseCodeAlign();
2528 if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) &&
2529 ValueSize == 1 && UseCodeAlign) {
2530 getStreamer().EmitCodeAlignment(Alignment, MaxBytesToFill);
2532 // FIXME: Target specific behavior about how the "extra" bytes are filled.
2533 getStreamer().EmitValueToAlignment(Alignment, FillExpr, ValueSize,
2540 /// parseDirectiveFile
2541 /// ::= .file [number] filename
2542 /// ::= .file number directory filename
2543 bool AsmParser::parseDirectiveFile(SMLoc DirectiveLoc) {
2544 // FIXME: I'm not sure what this is.
2545 int64_t FileNumber = -1;
2546 SMLoc FileNumberLoc = getLexer().getLoc();
2547 if (getLexer().is(AsmToken::Integer)) {
2548 FileNumber = getTok().getIntVal();
2552 return TokError("file number less than one");
2555 if (getLexer().isNot(AsmToken::String))
2556 return TokError("unexpected token in '.file' directive");
2558 // Usually the directory and filename together, otherwise just the directory.
2559 // Allow the strings to have escaped octal character sequence.
2560 std::string Path = getTok().getString();
2561 if (parseEscapedString(Path))
2565 StringRef Directory;
2567 std::string FilenameData;
2568 if (getLexer().is(AsmToken::String)) {
2569 if (FileNumber == -1)
2570 return TokError("explicit path specified, but no file number");
2571 if (parseEscapedString(FilenameData))
2573 Filename = FilenameData;
2580 if (getLexer().isNot(AsmToken::EndOfStatement))
2581 return TokError("unexpected token in '.file' directive");
2583 if (FileNumber == -1)
2584 getStreamer().EmitFileDirective(Filename);
2586 if (getContext().getGenDwarfForAssembly() == true)
2588 "input can't have .file dwarf directives when -g is "
2589 "used to generate dwarf debug info for assembly code");
2591 if (getStreamer().EmitDwarfFileDirective(FileNumber, Directory, Filename))
2592 Error(FileNumberLoc, "file number already allocated");
2598 /// parseDirectiveLine
2599 /// ::= .line [number]
2600 bool AsmParser::parseDirectiveLine() {
2601 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2602 if (getLexer().isNot(AsmToken::Integer))
2603 return TokError("unexpected token in '.line' directive");
2605 int64_t LineNumber = getTok().getIntVal();
2609 // FIXME: Do something with the .line.
2612 if (getLexer().isNot(AsmToken::EndOfStatement))
2613 return TokError("unexpected token in '.line' directive");
2618 /// parseDirectiveLoc
2619 /// ::= .loc FileNumber [LineNumber] [ColumnPos] [basic_block] [prologue_end]
2620 /// [epilogue_begin] [is_stmt VALUE] [isa VALUE]
2621 /// The first number is a file number, must have been previously assigned with
2622 /// a .file directive, the second number is the line number and optionally the
2623 /// third number is a column position (zero if not specified). The remaining
2624 /// optional items are .loc sub-directives.
2625 bool AsmParser::parseDirectiveLoc() {
2626 if (getLexer().isNot(AsmToken::Integer))
2627 return TokError("unexpected token in '.loc' directive");
2628 int64_t FileNumber = getTok().getIntVal();
2630 return TokError("file number less than one in '.loc' directive");
2631 if (!getContext().isValidDwarfFileNumber(FileNumber))
2632 return TokError("unassigned file number in '.loc' directive");
2635 int64_t LineNumber = 0;
2636 if (getLexer().is(AsmToken::Integer)) {
2637 LineNumber = getTok().getIntVal();
2639 return TokError("line number less than zero in '.loc' directive");
2643 int64_t ColumnPos = 0;
2644 if (getLexer().is(AsmToken::Integer)) {
2645 ColumnPos = getTok().getIntVal();
2647 return TokError("column position less than zero in '.loc' directive");
2651 unsigned Flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0;
2653 int64_t Discriminator = 0;
2654 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2656 if (getLexer().is(AsmToken::EndOfStatement))
2660 SMLoc Loc = getTok().getLoc();
2661 if (parseIdentifier(Name))
2662 return TokError("unexpected token in '.loc' directive");
2664 if (Name == "basic_block")
2665 Flags |= DWARF2_FLAG_BASIC_BLOCK;
2666 else if (Name == "prologue_end")
2667 Flags |= DWARF2_FLAG_PROLOGUE_END;
2668 else if (Name == "epilogue_begin")
2669 Flags |= DWARF2_FLAG_EPILOGUE_BEGIN;
2670 else if (Name == "is_stmt") {
2671 Loc = getTok().getLoc();
2672 const MCExpr *Value;
2673 if (parseExpression(Value))
2675 // The expression must be the constant 0 or 1.
2676 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
2677 int Value = MCE->getValue();
2679 Flags &= ~DWARF2_FLAG_IS_STMT;
2680 else if (Value == 1)
2681 Flags |= DWARF2_FLAG_IS_STMT;
2683 return Error(Loc, "is_stmt value not 0 or 1");
2685 return Error(Loc, "is_stmt value not the constant value of 0 or 1");
2687 } else if (Name == "isa") {
2688 Loc = getTok().getLoc();
2689 const MCExpr *Value;
2690 if (parseExpression(Value))
2692 // The expression must be a constant greater or equal to 0.
2693 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
2694 int Value = MCE->getValue();
2696 return Error(Loc, "isa number less than zero");
2699 return Error(Loc, "isa number not a constant value");
2701 } else if (Name == "discriminator") {
2702 if (parseAbsoluteExpression(Discriminator))
2705 return Error(Loc, "unknown sub-directive in '.loc' directive");
2708 if (getLexer().is(AsmToken::EndOfStatement))
2713 getStreamer().EmitDwarfLocDirective(FileNumber, LineNumber, ColumnPos, Flags,
2714 Isa, Discriminator, StringRef());
2719 /// parseDirectiveStabs
2720 /// ::= .stabs string, number, number, number
2721 bool AsmParser::parseDirectiveStabs() {
2722 return TokError("unsupported directive '.stabs'");
2725 /// parseDirectiveCFISections
2726 /// ::= .cfi_sections section [, section]
2727 bool AsmParser::parseDirectiveCFISections() {
2732 if (parseIdentifier(Name))
2733 return TokError("Expected an identifier");
2735 if (Name == ".eh_frame")
2737 else if (Name == ".debug_frame")
2740 if (getLexer().is(AsmToken::Comma)) {
2743 if (parseIdentifier(Name))
2744 return TokError("Expected an identifier");
2746 if (Name == ".eh_frame")
2748 else if (Name == ".debug_frame")
2752 getStreamer().EmitCFISections(EH, Debug);
2756 /// parseDirectiveCFIStartProc
2757 /// ::= .cfi_startproc
2758 bool AsmParser::parseDirectiveCFIStartProc() {
2759 getStreamer().EmitCFIStartProc();
2763 /// parseDirectiveCFIEndProc
2764 /// ::= .cfi_endproc
2765 bool AsmParser::parseDirectiveCFIEndProc() {
2766 getStreamer().EmitCFIEndProc();
2770 /// \brief parse register name or number.
2771 bool AsmParser::parseRegisterOrRegisterNumber(int64_t &Register,
2772 SMLoc DirectiveLoc) {
2775 if (getLexer().isNot(AsmToken::Integer)) {
2776 if (getTargetParser().ParseRegister(RegNo, DirectiveLoc, DirectiveLoc))
2778 Register = getContext().getRegisterInfo()->getDwarfRegNum(RegNo, true);
2780 return parseAbsoluteExpression(Register);
2785 /// parseDirectiveCFIDefCfa
2786 /// ::= .cfi_def_cfa register, offset
2787 bool AsmParser::parseDirectiveCFIDefCfa(SMLoc DirectiveLoc) {
2788 int64_t Register = 0;
2789 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
2792 if (getLexer().isNot(AsmToken::Comma))
2793 return TokError("unexpected token in directive");
2797 if (parseAbsoluteExpression(Offset))
2800 getStreamer().EmitCFIDefCfa(Register, Offset);
2804 /// parseDirectiveCFIDefCfaOffset
2805 /// ::= .cfi_def_cfa_offset offset
2806 bool AsmParser::parseDirectiveCFIDefCfaOffset() {
2808 if (parseAbsoluteExpression(Offset))
2811 getStreamer().EmitCFIDefCfaOffset(Offset);
2815 /// parseDirectiveCFIRegister
2816 /// ::= .cfi_register register, register
2817 bool AsmParser::parseDirectiveCFIRegister(SMLoc DirectiveLoc) {
2818 int64_t Register1 = 0;
2819 if (parseRegisterOrRegisterNumber(Register1, DirectiveLoc))
2822 if (getLexer().isNot(AsmToken::Comma))
2823 return TokError("unexpected token in directive");
2826 int64_t Register2 = 0;
2827 if (parseRegisterOrRegisterNumber(Register2, DirectiveLoc))
2830 getStreamer().EmitCFIRegister(Register1, Register2);
2834 /// parseDirectiveCFIWindowSave
2835 /// ::= .cfi_window_save
2836 bool AsmParser::parseDirectiveCFIWindowSave() {
2837 getStreamer().EmitCFIWindowSave();
2841 /// parseDirectiveCFIAdjustCfaOffset
2842 /// ::= .cfi_adjust_cfa_offset adjustment
2843 bool AsmParser::parseDirectiveCFIAdjustCfaOffset() {
2844 int64_t Adjustment = 0;
2845 if (parseAbsoluteExpression(Adjustment))
2848 getStreamer().EmitCFIAdjustCfaOffset(Adjustment);
2852 /// parseDirectiveCFIDefCfaRegister
2853 /// ::= .cfi_def_cfa_register register
2854 bool AsmParser::parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc) {
2855 int64_t Register = 0;
2856 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
2859 getStreamer().EmitCFIDefCfaRegister(Register);
2863 /// parseDirectiveCFIOffset
2864 /// ::= .cfi_offset register, offset
2865 bool AsmParser::parseDirectiveCFIOffset(SMLoc DirectiveLoc) {
2866 int64_t Register = 0;
2869 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
2872 if (getLexer().isNot(AsmToken::Comma))
2873 return TokError("unexpected token in directive");
2876 if (parseAbsoluteExpression(Offset))
2879 getStreamer().EmitCFIOffset(Register, Offset);
2883 /// parseDirectiveCFIRelOffset
2884 /// ::= .cfi_rel_offset register, offset
2885 bool AsmParser::parseDirectiveCFIRelOffset(SMLoc DirectiveLoc) {
2886 int64_t Register = 0;
2888 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
2891 if (getLexer().isNot(AsmToken::Comma))
2892 return TokError("unexpected token in directive");
2896 if (parseAbsoluteExpression(Offset))
2899 getStreamer().EmitCFIRelOffset(Register, Offset);
2903 static bool isValidEncoding(int64_t Encoding) {
2904 if (Encoding & ~0xff)
2907 if (Encoding == dwarf::DW_EH_PE_omit)
2910 const unsigned Format = Encoding & 0xf;
2911 if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 &&
2912 Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 &&
2913 Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 &&
2914 Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed)
2917 const unsigned Application = Encoding & 0x70;
2918 if (Application != dwarf::DW_EH_PE_absptr &&
2919 Application != dwarf::DW_EH_PE_pcrel)
2925 /// parseDirectiveCFIPersonalityOrLsda
2926 /// IsPersonality true for cfi_personality, false for cfi_lsda
2927 /// ::= .cfi_personality encoding, [symbol_name]
2928 /// ::= .cfi_lsda encoding, [symbol_name]
2929 bool AsmParser::parseDirectiveCFIPersonalityOrLsda(bool IsPersonality) {
2930 int64_t Encoding = 0;
2931 if (parseAbsoluteExpression(Encoding))
2933 if (Encoding == dwarf::DW_EH_PE_omit)
2936 if (!isValidEncoding(Encoding))
2937 return TokError("unsupported encoding.");
2939 if (getLexer().isNot(AsmToken::Comma))
2940 return TokError("unexpected token in directive");
2944 if (parseIdentifier(Name))
2945 return TokError("expected identifier in directive");
2947 MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
2950 getStreamer().EmitCFIPersonality(Sym, Encoding);
2952 getStreamer().EmitCFILsda(Sym, Encoding);
2956 /// parseDirectiveCFIRememberState
2957 /// ::= .cfi_remember_state
2958 bool AsmParser::parseDirectiveCFIRememberState() {
2959 getStreamer().EmitCFIRememberState();
2963 /// parseDirectiveCFIRestoreState
2964 /// ::= .cfi_remember_state
2965 bool AsmParser::parseDirectiveCFIRestoreState() {
2966 getStreamer().EmitCFIRestoreState();
2970 /// parseDirectiveCFISameValue
2971 /// ::= .cfi_same_value register
2972 bool AsmParser::parseDirectiveCFISameValue(SMLoc DirectiveLoc) {
2973 int64_t Register = 0;
2975 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
2978 getStreamer().EmitCFISameValue(Register);
2982 /// parseDirectiveCFIRestore
2983 /// ::= .cfi_restore register
2984 bool AsmParser::parseDirectiveCFIRestore(SMLoc DirectiveLoc) {
2985 int64_t Register = 0;
2986 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
2989 getStreamer().EmitCFIRestore(Register);
2993 /// parseDirectiveCFIEscape
2994 /// ::= .cfi_escape expression[,...]
2995 bool AsmParser::parseDirectiveCFIEscape() {
2998 if (parseAbsoluteExpression(CurrValue))
3001 Values.push_back((uint8_t)CurrValue);
3003 while (getLexer().is(AsmToken::Comma)) {
3006 if (parseAbsoluteExpression(CurrValue))
3009 Values.push_back((uint8_t)CurrValue);
3012 getStreamer().EmitCFIEscape(Values);
3016 /// parseDirectiveCFISignalFrame
3017 /// ::= .cfi_signal_frame
3018 bool AsmParser::parseDirectiveCFISignalFrame() {
3019 if (getLexer().isNot(AsmToken::EndOfStatement))
3020 return Error(getLexer().getLoc(),
3021 "unexpected token in '.cfi_signal_frame'");
3023 getStreamer().EmitCFISignalFrame();
3027 /// parseDirectiveCFIUndefined
3028 /// ::= .cfi_undefined register
3029 bool AsmParser::parseDirectiveCFIUndefined(SMLoc DirectiveLoc) {
3030 int64_t Register = 0;
3032 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
3035 getStreamer().EmitCFIUndefined(Register);
3039 /// parseDirectiveMacrosOnOff
3042 bool AsmParser::parseDirectiveMacrosOnOff(StringRef Directive) {
3043 if (getLexer().isNot(AsmToken::EndOfStatement))
3044 return Error(getLexer().getLoc(),
3045 "unexpected token in '" + Directive + "' directive");
3047 setMacrosEnabled(Directive == ".macros_on");
3051 /// parseDirectiveMacro
3052 /// ::= .macro name [parameters]
3053 bool AsmParser::parseDirectiveMacro(SMLoc DirectiveLoc) {
3055 if (parseIdentifier(Name))
3056 return TokError("expected identifier in '.macro' directive");
3058 MCAsmMacroParameters Parameters;
3059 // Argument delimiter is initially unknown. It will be set by
3060 // parseMacroArgument()
3061 AsmToken::TokenKind ArgumentDelimiter = AsmToken::Eof;
3062 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3064 MCAsmMacroParameter Parameter;
3065 if (parseIdentifier(Parameter.first))
3066 return TokError("expected identifier in '.macro' directive");
3068 if (getLexer().is(AsmToken::Equal)) {
3070 if (parseMacroArgument(Parameter.second, ArgumentDelimiter))
3074 Parameters.push_back(Parameter);
3076 if (getLexer().is(AsmToken::Comma))
3078 else if (getLexer().is(AsmToken::EndOfStatement))
3083 // Eat the end of statement.
3086 AsmToken EndToken, StartToken = getTok();
3088 // Lex the macro definition.
3090 // Check whether we have reached the end of the file.
3091 if (getLexer().is(AsmToken::Eof))
3092 return Error(DirectiveLoc, "no matching '.endmacro' in definition");
3094 // Otherwise, check whether we have reach the .endmacro.
3095 if (getLexer().is(AsmToken::Identifier) &&
3096 (getTok().getIdentifier() == ".endm" ||
3097 getTok().getIdentifier() == ".endmacro")) {
3098 EndToken = getTok();
3100 if (getLexer().isNot(AsmToken::EndOfStatement))
3101 return TokError("unexpected token in '" + EndToken.getIdentifier() +
3106 // Otherwise, scan til the end of the statement.
3107 eatToEndOfStatement();
3110 if (lookupMacro(Name)) {
3111 return Error(DirectiveLoc, "macro '" + Name + "' is already defined");
3114 const char *BodyStart = StartToken.getLoc().getPointer();
3115 const char *BodyEnd = EndToken.getLoc().getPointer();
3116 StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
3117 checkForBadMacro(DirectiveLoc, Name, Body, Parameters);
3118 defineMacro(Name, MCAsmMacro(Name, Body, Parameters));
3122 /// checkForBadMacro
3124 /// With the support added for named parameters there may be code out there that
3125 /// is transitioning from positional parameters. In versions of gas that did
3126 /// not support named parameters they would be ignored on the macro defintion.
3127 /// But to support both styles of parameters this is not possible so if a macro
3128 /// defintion has named parameters but does not use them and has what appears
3129 /// to be positional parameters, strings like $1, $2, ... and $n, then issue a
3130 /// warning that the positional parameter found in body which have no effect.
3131 /// Hoping the developer will either remove the named parameters from the macro
3132 /// definiton so the positional parameters get used if that was what was
3133 /// intended or change the macro to use the named parameters. It is possible
3134 /// this warning will trigger when the none of the named parameters are used
3135 /// and the strings like $1 are infact to simply to be passed trough unchanged.
3136 void AsmParser::checkForBadMacro(SMLoc DirectiveLoc, StringRef Name,
3138 MCAsmMacroParameters Parameters) {
3139 // If this macro is not defined with named parameters the warning we are
3140 // checking for here doesn't apply.
3141 unsigned NParameters = Parameters.size();
3142 if (NParameters == 0)
3145 bool NamedParametersFound = false;
3146 bool PositionalParametersFound = false;
3148 // Look at the body of the macro for use of both the named parameters and what
3149 // are likely to be positional parameters. This is what expandMacro() is
3150 // doing when it finds the parameters in the body.
3151 while (!Body.empty()) {
3152 // Scan for the next possible parameter.
3153 std::size_t End = Body.size(), Pos = 0;
3154 for (; Pos != End; ++Pos) {
3155 // Check for a substitution or escape.
3156 // This macro is defined with parameters, look for \foo, \bar, etc.
3157 if (Body[Pos] == '\\' && Pos + 1 != End)
3160 // This macro should have parameters, but look for $0, $1, ..., $n too.
3161 if (Body[Pos] != '$' || Pos + 1 == End)
3163 char Next = Body[Pos + 1];
3164 if (Next == '$' || Next == 'n' ||
3165 isdigit(static_cast<unsigned char>(Next)))
3169 // Check if we reached the end.
3173 if (Body[Pos] == '$') {
3174 switch (Body[Pos + 1]) {
3179 // $n => number of arguments
3181 PositionalParametersFound = true;
3184 // $[0-9] => argument
3186 PositionalParametersFound = true;
3192 unsigned I = Pos + 1;
3193 while (isIdentifierChar(Body[I]) && I + 1 != End)
3196 const char *Begin = Body.data() + Pos + 1;
3197 StringRef Argument(Begin, I - (Pos + 1));
3199 for (; Index < NParameters; ++Index)
3200 if (Parameters[Index].first == Argument)
3203 if (Index == NParameters) {
3204 if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
3210 NamedParametersFound = true;
3211 Pos += 1 + Argument.size();
3214 // Update the scan point.
3215 Body = Body.substr(Pos);
3218 if (!NamedParametersFound && PositionalParametersFound)
3219 Warning(DirectiveLoc, "macro defined with named parameters which are not "
3220 "used in macro body, possible positional parameter "
3221 "found in body which will have no effect");
3224 /// parseDirectiveEndMacro
3227 bool AsmParser::parseDirectiveEndMacro(StringRef Directive) {
3228 if (getLexer().isNot(AsmToken::EndOfStatement))
3229 return TokError("unexpected token in '" + Directive + "' directive");
3231 // If we are inside a macro instantiation, terminate the current
3233 if (isInsideMacroInstantiation()) {
3238 // Otherwise, this .endmacro is a stray entry in the file; well formed
3239 // .endmacro directives are handled during the macro definition parsing.
3240 return TokError("unexpected '" + Directive + "' in file, "
3241 "no current macro definition");
3244 /// parseDirectivePurgeMacro
3246 bool AsmParser::parseDirectivePurgeMacro(SMLoc DirectiveLoc) {
3248 if (parseIdentifier(Name))
3249 return TokError("expected identifier in '.purgem' directive");
3251 if (getLexer().isNot(AsmToken::EndOfStatement))
3252 return TokError("unexpected token in '.purgem' directive");
3254 if (!lookupMacro(Name))
3255 return Error(DirectiveLoc, "macro '" + Name + "' is not defined");
3257 undefineMacro(Name);
3261 /// parseDirectiveBundleAlignMode
3262 /// ::= {.bundle_align_mode} expression
3263 bool AsmParser::parseDirectiveBundleAlignMode() {
3264 checkForValidSection();
3266 // Expect a single argument: an expression that evaluates to a constant
3267 // in the inclusive range 0-30.
3268 SMLoc ExprLoc = getLexer().getLoc();
3269 int64_t AlignSizePow2;
3270 if (parseAbsoluteExpression(AlignSizePow2))
3272 else if (getLexer().isNot(AsmToken::EndOfStatement))
3273 return TokError("unexpected token after expression in"
3274 " '.bundle_align_mode' directive");
3275 else if (AlignSizePow2 < 0 || AlignSizePow2 > 30)
3276 return Error(ExprLoc,
3277 "invalid bundle alignment size (expected between 0 and 30)");
3281 // Because of AlignSizePow2's verified range we can safely truncate it to
3283 getStreamer().EmitBundleAlignMode(static_cast<unsigned>(AlignSizePow2));
3287 /// parseDirectiveBundleLock
3288 /// ::= {.bundle_lock} [align_to_end]
3289 bool AsmParser::parseDirectiveBundleLock() {
3290 checkForValidSection();
3291 bool AlignToEnd = false;
3293 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3295 SMLoc Loc = getTok().getLoc();
3296 const char *kInvalidOptionError =
3297 "invalid option for '.bundle_lock' directive";
3299 if (parseIdentifier(Option))
3300 return Error(Loc, kInvalidOptionError);
3302 if (Option != "align_to_end")
3303 return Error(Loc, kInvalidOptionError);
3304 else if (getLexer().isNot(AsmToken::EndOfStatement))
3306 "unexpected token after '.bundle_lock' directive option");
3312 getStreamer().EmitBundleLock(AlignToEnd);
3316 /// parseDirectiveBundleLock
3317 /// ::= {.bundle_lock}
3318 bool AsmParser::parseDirectiveBundleUnlock() {
3319 checkForValidSection();
3321 if (getLexer().isNot(AsmToken::EndOfStatement))
3322 return TokError("unexpected token in '.bundle_unlock' directive");
3325 getStreamer().EmitBundleUnlock();
3329 /// parseDirectiveSpace
3330 /// ::= (.skip | .space) expression [ , expression ]
3331 bool AsmParser::parseDirectiveSpace(StringRef IDVal) {
3332 checkForValidSection();
3335 if (parseAbsoluteExpression(NumBytes))
3338 int64_t FillExpr = 0;
3339 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3340 if (getLexer().isNot(AsmToken::Comma))
3341 return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
3344 if (parseAbsoluteExpression(FillExpr))
3347 if (getLexer().isNot(AsmToken::EndOfStatement))
3348 return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
3354 return TokError("invalid number of bytes in '" + Twine(IDVal) +
3357 // FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0.
3358 getStreamer().EmitFill(NumBytes, FillExpr);
3363 /// parseDirectiveLEB128
3364 /// ::= (.sleb128 | .uleb128) expression
3365 bool AsmParser::parseDirectiveLEB128(bool Signed) {
3366 checkForValidSection();
3367 const MCExpr *Value;
3369 if (parseExpression(Value))
3372 if (getLexer().isNot(AsmToken::EndOfStatement))
3373 return TokError("unexpected token in directive");
3376 getStreamer().EmitSLEB128Value(Value);
3378 getStreamer().EmitULEB128Value(Value);
3383 /// parseDirectiveSymbolAttribute
3384 /// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ]
3385 bool AsmParser::parseDirectiveSymbolAttribute(MCSymbolAttr Attr) {
3386 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3389 SMLoc Loc = getTok().getLoc();
3391 if (parseIdentifier(Name))
3392 return Error(Loc, "expected identifier in directive");
3394 MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
3396 // Assembler local symbols don't make any sense here. Complain loudly.
3397 if (Sym->isTemporary())
3398 return Error(Loc, "non-local symbol required in directive");
3400 if (!getStreamer().EmitSymbolAttribute(Sym, Attr))
3401 return Error(Loc, "unable to emit symbol attribute");
3403 if (getLexer().is(AsmToken::EndOfStatement))
3406 if (getLexer().isNot(AsmToken::Comma))
3407 return TokError("unexpected token in directive");
3416 /// parseDirectiveComm
3417 /// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ]
3418 bool AsmParser::parseDirectiveComm(bool IsLocal) {
3419 checkForValidSection();
3421 SMLoc IDLoc = getLexer().getLoc();
3423 if (parseIdentifier(Name))
3424 return TokError("expected identifier in directive");
3426 // Handle the identifier as the key symbol.
3427 MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
3429 if (getLexer().isNot(AsmToken::Comma))
3430 return TokError("unexpected token in directive");
3434 SMLoc SizeLoc = getLexer().getLoc();
3435 if (parseAbsoluteExpression(Size))
3438 int64_t Pow2Alignment = 0;
3439 SMLoc Pow2AlignmentLoc;
3440 if (getLexer().is(AsmToken::Comma)) {
3442 Pow2AlignmentLoc = getLexer().getLoc();
3443 if (parseAbsoluteExpression(Pow2Alignment))
3446 LCOMM::LCOMMType LCOMM = Lexer.getMAI().getLCOMMDirectiveAlignmentType();
3447 if (IsLocal && LCOMM == LCOMM::NoAlignment)
3448 return Error(Pow2AlignmentLoc, "alignment not supported on this target");
3450 // If this target takes alignments in bytes (not log) validate and convert.
3451 if ((!IsLocal && Lexer.getMAI().getCOMMDirectiveAlignmentIsInBytes()) ||
3452 (IsLocal && LCOMM == LCOMM::ByteAlignment)) {
3453 if (!isPowerOf2_64(Pow2Alignment))
3454 return Error(Pow2AlignmentLoc, "alignment must be a power of 2");
3455 Pow2Alignment = Log2_64(Pow2Alignment);
3459 if (getLexer().isNot(AsmToken::EndOfStatement))
3460 return TokError("unexpected token in '.comm' or '.lcomm' directive");
3464 // NOTE: a size of zero for a .comm should create a undefined symbol
3465 // but a size of .lcomm creates a bss symbol of size zero.
3467 return Error(SizeLoc, "invalid '.comm' or '.lcomm' directive size, can't "
3468 "be less than zero");
3470 // NOTE: The alignment in the directive is a power of 2 value, the assembler
3471 // may internally end up wanting an alignment in bytes.
3472 // FIXME: Diagnose overflow.
3473 if (Pow2Alignment < 0)
3474 return Error(Pow2AlignmentLoc, "invalid '.comm' or '.lcomm' directive "
3475 "alignment, can't be less than zero");
3477 if (!Sym->isUndefined())
3478 return Error(IDLoc, "invalid symbol redefinition");
3480 // Create the Symbol as a common or local common with Size and Pow2Alignment
3482 getStreamer().EmitLocalCommonSymbol(Sym, Size, 1 << Pow2Alignment);
3486 getStreamer().EmitCommonSymbol(Sym, Size, 1 << Pow2Alignment);
3490 /// parseDirectiveAbort
3491 /// ::= .abort [... message ...]
3492 bool AsmParser::parseDirectiveAbort() {
3493 // FIXME: Use loc from directive.
3494 SMLoc Loc = getLexer().getLoc();
3496 StringRef Str = parseStringToEndOfStatement();
3497 if (getLexer().isNot(AsmToken::EndOfStatement))
3498 return TokError("unexpected token in '.abort' directive");
3503 Error(Loc, ".abort detected. Assembly stopping.");
3505 Error(Loc, ".abort '" + Str + "' detected. Assembly stopping.");
3506 // FIXME: Actually abort assembly here.
3511 /// parseDirectiveInclude
3512 /// ::= .include "filename"
3513 bool AsmParser::parseDirectiveInclude() {
3514 if (getLexer().isNot(AsmToken::String))
3515 return TokError("expected string in '.include' directive");
3517 // Allow the strings to have escaped octal character sequence.
3518 std::string Filename;
3519 if (parseEscapedString(Filename))
3521 SMLoc IncludeLoc = getLexer().getLoc();
3524 if (getLexer().isNot(AsmToken::EndOfStatement))
3525 return TokError("unexpected token in '.include' directive");
3527 // Attempt to switch the lexer to the included file before consuming the end
3528 // of statement to avoid losing it when we switch.
3529 if (enterIncludeFile(Filename)) {
3530 Error(IncludeLoc, "Could not find include file '" + Filename + "'");
3537 /// parseDirectiveIncbin
3538 /// ::= .incbin "filename"
3539 bool AsmParser::parseDirectiveIncbin() {
3540 if (getLexer().isNot(AsmToken::String))
3541 return TokError("expected string in '.incbin' directive");
3543 // Allow the strings to have escaped octal character sequence.
3544 std::string Filename;
3545 if (parseEscapedString(Filename))
3547 SMLoc IncbinLoc = getLexer().getLoc();
3550 if (getLexer().isNot(AsmToken::EndOfStatement))
3551 return TokError("unexpected token in '.incbin' directive");
3553 // Attempt to process the included file.
3554 if (processIncbinFile(Filename)) {
3555 Error(IncbinLoc, "Could not find incbin file '" + Filename + "'");
3562 /// parseDirectiveIf
3563 /// ::= .if expression
3564 bool AsmParser::parseDirectiveIf(SMLoc DirectiveLoc) {
3565 TheCondStack.push_back(TheCondState);
3566 TheCondState.TheCond = AsmCond::IfCond;
3567 if (TheCondState.Ignore) {
3568 eatToEndOfStatement();
3571 if (parseAbsoluteExpression(ExprValue))
3574 if (getLexer().isNot(AsmToken::EndOfStatement))
3575 return TokError("unexpected token in '.if' directive");
3579 TheCondState.CondMet = ExprValue;
3580 TheCondState.Ignore = !TheCondState.CondMet;
3586 /// parseDirectiveIfb
3588 bool AsmParser::parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) {
3589 TheCondStack.push_back(TheCondState);
3590 TheCondState.TheCond = AsmCond::IfCond;
3592 if (TheCondState.Ignore) {
3593 eatToEndOfStatement();
3595 StringRef Str = parseStringToEndOfStatement();
3597 if (getLexer().isNot(AsmToken::EndOfStatement))
3598 return TokError("unexpected token in '.ifb' directive");
3602 TheCondState.CondMet = ExpectBlank == Str.empty();
3603 TheCondState.Ignore = !TheCondState.CondMet;
3609 /// parseDirectiveIfc
3610 /// ::= .ifc string1, string2
3611 bool AsmParser::parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) {
3612 TheCondStack.push_back(TheCondState);
3613 TheCondState.TheCond = AsmCond::IfCond;
3615 if (TheCondState.Ignore) {
3616 eatToEndOfStatement();
3618 StringRef Str1 = parseStringToComma();
3620 if (getLexer().isNot(AsmToken::Comma))
3621 return TokError("unexpected token in '.ifc' directive");
3625 StringRef Str2 = parseStringToEndOfStatement();
3627 if (getLexer().isNot(AsmToken::EndOfStatement))
3628 return TokError("unexpected token in '.ifc' directive");
3632 TheCondState.CondMet = ExpectEqual == (Str1 == Str2);
3633 TheCondState.Ignore = !TheCondState.CondMet;
3639 /// parseDirectiveIfdef
3640 /// ::= .ifdef symbol
3641 bool AsmParser::parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) {
3643 TheCondStack.push_back(TheCondState);
3644 TheCondState.TheCond = AsmCond::IfCond;
3646 if (TheCondState.Ignore) {
3647 eatToEndOfStatement();
3649 if (parseIdentifier(Name))
3650 return TokError("expected identifier after '.ifdef'");
3654 MCSymbol *Sym = getContext().LookupSymbol(Name);
3657 TheCondState.CondMet = (Sym != NULL && !Sym->isUndefined());
3659 TheCondState.CondMet = (Sym == NULL || Sym->isUndefined());
3660 TheCondState.Ignore = !TheCondState.CondMet;
3666 /// parseDirectiveElseIf
3667 /// ::= .elseif expression
3668 bool AsmParser::parseDirectiveElseIf(SMLoc DirectiveLoc) {
3669 if (TheCondState.TheCond != AsmCond::IfCond &&
3670 TheCondState.TheCond != AsmCond::ElseIfCond)
3671 Error(DirectiveLoc, "Encountered a .elseif that doesn't follow a .if or "
3673 TheCondState.TheCond = AsmCond::ElseIfCond;
3675 bool LastIgnoreState = false;
3676 if (!TheCondStack.empty())
3677 LastIgnoreState = TheCondStack.back().Ignore;
3678 if (LastIgnoreState || TheCondState.CondMet) {
3679 TheCondState.Ignore = true;
3680 eatToEndOfStatement();
3683 if (parseAbsoluteExpression(ExprValue))
3686 if (getLexer().isNot(AsmToken::EndOfStatement))
3687 return TokError("unexpected token in '.elseif' directive");
3690 TheCondState.CondMet = ExprValue;
3691 TheCondState.Ignore = !TheCondState.CondMet;
3697 /// parseDirectiveElse
3699 bool AsmParser::parseDirectiveElse(SMLoc DirectiveLoc) {
3700 if (getLexer().isNot(AsmToken::EndOfStatement))
3701 return TokError("unexpected token in '.else' directive");
3705 if (TheCondState.TheCond != AsmCond::IfCond &&
3706 TheCondState.TheCond != AsmCond::ElseIfCond)
3707 Error(DirectiveLoc, "Encountered a .else that doesn't follow a .if or an "
3709 TheCondState.TheCond = AsmCond::ElseCond;
3710 bool LastIgnoreState = false;
3711 if (!TheCondStack.empty())
3712 LastIgnoreState = TheCondStack.back().Ignore;
3713 if (LastIgnoreState || TheCondState.CondMet)
3714 TheCondState.Ignore = true;
3716 TheCondState.Ignore = false;
3721 /// parseDirectiveEndIf
3723 bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) {
3724 if (getLexer().isNot(AsmToken::EndOfStatement))
3725 return TokError("unexpected token in '.endif' directive");
3729 if ((TheCondState.TheCond == AsmCond::NoCond) || TheCondStack.empty())
3730 Error(DirectiveLoc, "Encountered a .endif that doesn't follow a .if or "
3732 if (!TheCondStack.empty()) {
3733 TheCondState = TheCondStack.back();
3734 TheCondStack.pop_back();
3740 void AsmParser::initializeDirectiveKindMap() {
3741 DirectiveKindMap[".set"] = DK_SET;
3742 DirectiveKindMap[".equ"] = DK_EQU;
3743 DirectiveKindMap[".equiv"] = DK_EQUIV;
3744 DirectiveKindMap[".ascii"] = DK_ASCII;
3745 DirectiveKindMap[".asciz"] = DK_ASCIZ;
3746 DirectiveKindMap[".string"] = DK_STRING;
3747 DirectiveKindMap[".byte"] = DK_BYTE;
3748 DirectiveKindMap[".short"] = DK_SHORT;
3749 DirectiveKindMap[".value"] = DK_VALUE;
3750 DirectiveKindMap[".2byte"] = DK_2BYTE;
3751 DirectiveKindMap[".long"] = DK_LONG;
3752 DirectiveKindMap[".int"] = DK_INT;
3753 DirectiveKindMap[".4byte"] = DK_4BYTE;
3754 DirectiveKindMap[".quad"] = DK_QUAD;
3755 DirectiveKindMap[".8byte"] = DK_8BYTE;
3756 DirectiveKindMap[".single"] = DK_SINGLE;
3757 DirectiveKindMap[".float"] = DK_FLOAT;
3758 DirectiveKindMap[".double"] = DK_DOUBLE;
3759 DirectiveKindMap[".align"] = DK_ALIGN;
3760 DirectiveKindMap[".align32"] = DK_ALIGN32;
3761 DirectiveKindMap[".balign"] = DK_BALIGN;
3762 DirectiveKindMap[".balignw"] = DK_BALIGNW;
3763 DirectiveKindMap[".balignl"] = DK_BALIGNL;
3764 DirectiveKindMap[".p2align"] = DK_P2ALIGN;
3765 DirectiveKindMap[".p2alignw"] = DK_P2ALIGNW;
3766 DirectiveKindMap[".p2alignl"] = DK_P2ALIGNL;
3767 DirectiveKindMap[".org"] = DK_ORG;
3768 DirectiveKindMap[".fill"] = DK_FILL;
3769 DirectiveKindMap[".zero"] = DK_ZERO;
3770 DirectiveKindMap[".extern"] = DK_EXTERN;
3771 DirectiveKindMap[".globl"] = DK_GLOBL;
3772 DirectiveKindMap[".global"] = DK_GLOBAL;
3773 DirectiveKindMap[".lazy_reference"] = DK_LAZY_REFERENCE;
3774 DirectiveKindMap[".no_dead_strip"] = DK_NO_DEAD_STRIP;
3775 DirectiveKindMap[".symbol_resolver"] = DK_SYMBOL_RESOLVER;
3776 DirectiveKindMap[".private_extern"] = DK_PRIVATE_EXTERN;
3777 DirectiveKindMap[".reference"] = DK_REFERENCE;
3778 DirectiveKindMap[".weak_definition"] = DK_WEAK_DEFINITION;
3779 DirectiveKindMap[".weak_reference"] = DK_WEAK_REFERENCE;
3780 DirectiveKindMap[".weak_def_can_be_hidden"] = DK_WEAK_DEF_CAN_BE_HIDDEN;
3781 DirectiveKindMap[".comm"] = DK_COMM;
3782 DirectiveKindMap[".common"] = DK_COMMON;
3783 DirectiveKindMap[".lcomm"] = DK_LCOMM;
3784 DirectiveKindMap[".abort"] = DK_ABORT;
3785 DirectiveKindMap[".include"] = DK_INCLUDE;
3786 DirectiveKindMap[".incbin"] = DK_INCBIN;
3787 DirectiveKindMap[".code16"] = DK_CODE16;
3788 DirectiveKindMap[".code16gcc"] = DK_CODE16GCC;
3789 DirectiveKindMap[".rept"] = DK_REPT;
3790 DirectiveKindMap[".irp"] = DK_IRP;
3791 DirectiveKindMap[".irpc"] = DK_IRPC;
3792 DirectiveKindMap[".endr"] = DK_ENDR;
3793 DirectiveKindMap[".bundle_align_mode"] = DK_BUNDLE_ALIGN_MODE;
3794 DirectiveKindMap[".bundle_lock"] = DK_BUNDLE_LOCK;
3795 DirectiveKindMap[".bundle_unlock"] = DK_BUNDLE_UNLOCK;
3796 DirectiveKindMap[".if"] = DK_IF;
3797 DirectiveKindMap[".ifb"] = DK_IFB;
3798 DirectiveKindMap[".ifnb"] = DK_IFNB;
3799 DirectiveKindMap[".ifc"] = DK_IFC;
3800 DirectiveKindMap[".ifnc"] = DK_IFNC;
3801 DirectiveKindMap[".ifdef"] = DK_IFDEF;
3802 DirectiveKindMap[".ifndef"] = DK_IFNDEF;
3803 DirectiveKindMap[".ifnotdef"] = DK_IFNOTDEF;
3804 DirectiveKindMap[".elseif"] = DK_ELSEIF;
3805 DirectiveKindMap[".else"] = DK_ELSE;
3806 DirectiveKindMap[".endif"] = DK_ENDIF;
3807 DirectiveKindMap[".skip"] = DK_SKIP;
3808 DirectiveKindMap[".space"] = DK_SPACE;
3809 DirectiveKindMap[".file"] = DK_FILE;
3810 DirectiveKindMap[".line"] = DK_LINE;
3811 DirectiveKindMap[".loc"] = DK_LOC;
3812 DirectiveKindMap[".stabs"] = DK_STABS;
3813 DirectiveKindMap[".sleb128"] = DK_SLEB128;
3814 DirectiveKindMap[".uleb128"] = DK_ULEB128;
3815 DirectiveKindMap[".cfi_sections"] = DK_CFI_SECTIONS;
3816 DirectiveKindMap[".cfi_startproc"] = DK_CFI_STARTPROC;
3817 DirectiveKindMap[".cfi_endproc"] = DK_CFI_ENDPROC;
3818 DirectiveKindMap[".cfi_def_cfa"] = DK_CFI_DEF_CFA;
3819 DirectiveKindMap[".cfi_def_cfa_offset"] = DK_CFI_DEF_CFA_OFFSET;
3820 DirectiveKindMap[".cfi_adjust_cfa_offset"] = DK_CFI_ADJUST_CFA_OFFSET;
3821 DirectiveKindMap[".cfi_def_cfa_register"] = DK_CFI_DEF_CFA_REGISTER;
3822 DirectiveKindMap[".cfi_offset"] = DK_CFI_OFFSET;
3823 DirectiveKindMap[".cfi_rel_offset"] = DK_CFI_REL_OFFSET;
3824 DirectiveKindMap[".cfi_personality"] = DK_CFI_PERSONALITY;
3825 DirectiveKindMap[".cfi_lsda"] = DK_CFI_LSDA;
3826 DirectiveKindMap[".cfi_remember_state"] = DK_CFI_REMEMBER_STATE;
3827 DirectiveKindMap[".cfi_restore_state"] = DK_CFI_RESTORE_STATE;
3828 DirectiveKindMap[".cfi_same_value"] = DK_CFI_SAME_VALUE;
3829 DirectiveKindMap[".cfi_restore"] = DK_CFI_RESTORE;
3830 DirectiveKindMap[".cfi_escape"] = DK_CFI_ESCAPE;
3831 DirectiveKindMap[".cfi_signal_frame"] = DK_CFI_SIGNAL_FRAME;
3832 DirectiveKindMap[".cfi_undefined"] = DK_CFI_UNDEFINED;
3833 DirectiveKindMap[".cfi_register"] = DK_CFI_REGISTER;
3834 DirectiveKindMap[".cfi_window_save"] = DK_CFI_WINDOW_SAVE;
3835 DirectiveKindMap[".macros_on"] = DK_MACROS_ON;
3836 DirectiveKindMap[".macros_off"] = DK_MACROS_OFF;
3837 DirectiveKindMap[".macro"] = DK_MACRO;
3838 DirectiveKindMap[".endm"] = DK_ENDM;
3839 DirectiveKindMap[".endmacro"] = DK_ENDMACRO;
3840 DirectiveKindMap[".purgem"] = DK_PURGEM;
3843 MCAsmMacro *AsmParser::parseMacroLikeBody(SMLoc DirectiveLoc) {
3844 AsmToken EndToken, StartToken = getTok();
3846 unsigned NestLevel = 0;
3848 // Check whether we have reached the end of the file.
3849 if (getLexer().is(AsmToken::Eof)) {
3850 Error(DirectiveLoc, "no matching '.endr' in definition");
3854 if (Lexer.is(AsmToken::Identifier) &&
3855 (getTok().getIdentifier() == ".rept")) {
3859 // Otherwise, check whether we have reached the .endr.
3860 if (Lexer.is(AsmToken::Identifier) && getTok().getIdentifier() == ".endr") {
3861 if (NestLevel == 0) {
3862 EndToken = getTok();
3864 if (Lexer.isNot(AsmToken::EndOfStatement)) {
3865 TokError("unexpected token in '.endr' directive");
3873 // Otherwise, scan till the end of the statement.
3874 eatToEndOfStatement();
3877 const char *BodyStart = StartToken.getLoc().getPointer();
3878 const char *BodyEnd = EndToken.getLoc().getPointer();
3879 StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
3881 // We Are Anonymous.
3883 MCAsmMacroParameters Parameters;
3884 MacroLikeBodies.push_back(MCAsmMacro(Name, Body, Parameters));
3885 return &MacroLikeBodies.back();
3888 void AsmParser::instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
3889 raw_svector_ostream &OS) {
3892 MemoryBuffer *Instantiation =
3893 MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
3895 // Create the macro instantiation object and add to the current macro
3896 // instantiation stack.
3897 MacroInstantiation *MI = new MacroInstantiation(
3898 M, DirectiveLoc, CurBuffer, getTok().getLoc(), Instantiation);
3899 ActiveMacros.push_back(MI);
3901 // Jump to the macro instantiation and prime the lexer.
3902 CurBuffer = SrcMgr.AddNewSourceBuffer(MI->Instantiation, SMLoc());
3903 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
3907 bool AsmParser::parseDirectiveRept(SMLoc DirectiveLoc) {
3909 if (parseAbsoluteExpression(Count))
3910 return TokError("unexpected token in '.rept' directive");
3913 return TokError("Count is negative");
3915 if (Lexer.isNot(AsmToken::EndOfStatement))
3916 return TokError("unexpected token in '.rept' directive");
3918 // Eat the end of statement.
3921 // Lex the rept definition.
3922 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
3926 // Macro instantiation is lexical, unfortunately. We construct a new buffer
3927 // to hold the macro body with substitutions.
3928 SmallString<256> Buf;
3929 MCAsmMacroParameters Parameters;
3930 MCAsmMacroArguments A;
3931 raw_svector_ostream OS(Buf);
3933 if (expandMacro(OS, M->Body, Parameters, A, getTok().getLoc()))
3936 instantiateMacroLikeBody(M, DirectiveLoc, OS);
3941 /// parseDirectiveIrp
3942 /// ::= .irp symbol,values
3943 bool AsmParser::parseDirectiveIrp(SMLoc DirectiveLoc) {
3944 MCAsmMacroParameters Parameters;
3945 MCAsmMacroParameter Parameter;
3947 if (parseIdentifier(Parameter.first))
3948 return TokError("expected identifier in '.irp' directive");
3950 Parameters.push_back(Parameter);
3952 if (Lexer.isNot(AsmToken::Comma))
3953 return TokError("expected comma in '.irp' directive");
3957 MCAsmMacroArguments A;
3958 if (parseMacroArguments(0, A))
3961 // Eat the end of statement.
3964 // Lex the irp definition.
3965 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
3969 // Macro instantiation is lexical, unfortunately. We construct a new buffer
3970 // to hold the macro body with substitutions.
3971 SmallString<256> Buf;
3972 raw_svector_ostream OS(Buf);
3974 for (MCAsmMacroArguments::iterator i = A.begin(), e = A.end(); i != e; ++i) {
3975 MCAsmMacroArguments Args;
3978 if (expandMacro(OS, M->Body, Parameters, Args, getTok().getLoc()))
3982 instantiateMacroLikeBody(M, DirectiveLoc, OS);
3987 /// parseDirectiveIrpc
3988 /// ::= .irpc symbol,values
3989 bool AsmParser::parseDirectiveIrpc(SMLoc DirectiveLoc) {
3990 MCAsmMacroParameters Parameters;
3991 MCAsmMacroParameter Parameter;
3993 if (parseIdentifier(Parameter.first))
3994 return TokError("expected identifier in '.irpc' directive");
3996 Parameters.push_back(Parameter);
3998 if (Lexer.isNot(AsmToken::Comma))
3999 return TokError("expected comma in '.irpc' directive");
4003 MCAsmMacroArguments A;
4004 if (parseMacroArguments(0, A))
4007 if (A.size() != 1 || A.front().size() != 1)
4008 return TokError("unexpected token in '.irpc' directive");
4010 // Eat the end of statement.
4013 // Lex the irpc definition.
4014 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
4018 // Macro instantiation is lexical, unfortunately. We construct a new buffer
4019 // to hold the macro body with substitutions.
4020 SmallString<256> Buf;
4021 raw_svector_ostream OS(Buf);
4023 StringRef Values = A.front().front().getString();
4024 std::size_t I, End = Values.size();
4025 for (I = 0; I < End; ++I) {
4026 MCAsmMacroArgument Arg;
4027 Arg.push_back(AsmToken(AsmToken::Identifier, Values.slice(I, I + 1)));
4029 MCAsmMacroArguments Args;
4030 Args.push_back(Arg);
4032 if (expandMacro(OS, M->Body, Parameters, Args, getTok().getLoc()))
4036 instantiateMacroLikeBody(M, DirectiveLoc, OS);
4041 bool AsmParser::parseDirectiveEndr(SMLoc DirectiveLoc) {
4042 if (ActiveMacros.empty())
4043 return TokError("unmatched '.endr' directive");
4045 // The only .repl that should get here are the ones created by
4046 // instantiateMacroLikeBody.
4047 assert(getLexer().is(AsmToken::EndOfStatement));
4053 bool AsmParser::parseDirectiveMSEmit(SMLoc IDLoc, ParseStatementInfo &Info,
4055 const MCExpr *Value;
4056 SMLoc ExprLoc = getLexer().getLoc();
4057 if (parseExpression(Value))
4059 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
4061 return Error(ExprLoc, "unexpected expression in _emit");
4062 uint64_t IntValue = MCE->getValue();
4063 if (!isUIntN(8, IntValue) && !isIntN(8, IntValue))
4064 return Error(ExprLoc, "literal value out of range for directive");
4066 Info.AsmRewrites->push_back(AsmRewrite(AOK_Emit, IDLoc, Len));
4070 bool AsmParser::parseDirectiveMSAlign(SMLoc IDLoc, ParseStatementInfo &Info) {
4071 const MCExpr *Value;
4072 SMLoc ExprLoc = getLexer().getLoc();
4073 if (parseExpression(Value))
4075 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
4077 return Error(ExprLoc, "unexpected expression in align");
4078 uint64_t IntValue = MCE->getValue();
4079 if (!isPowerOf2_64(IntValue))
4080 return Error(ExprLoc, "literal value not a power of two greater then zero");
4082 Info.AsmRewrites->push_back(
4083 AsmRewrite(AOK_Align, IDLoc, 5, Log2_64(IntValue)));
4087 // We are comparing pointers, but the pointers are relative to a single string.
4088 // Thus, this should always be deterministic.
4089 static int rewritesSort(const AsmRewrite *AsmRewriteA,
4090 const AsmRewrite *AsmRewriteB) {
4091 if (AsmRewriteA->Loc.getPointer() < AsmRewriteB->Loc.getPointer())
4093 if (AsmRewriteB->Loc.getPointer() < AsmRewriteA->Loc.getPointer())
4096 // It's possible to have a SizeDirective, Imm/ImmPrefix and an Input/Output
4097 // rewrite to the same location. Make sure the SizeDirective rewrite is
4098 // performed first, then the Imm/ImmPrefix and finally the Input/Output. This
4099 // ensures the sort algorithm is stable.
4100 if (AsmRewritePrecedence[AsmRewriteA->Kind] >
4101 AsmRewritePrecedence[AsmRewriteB->Kind])
4104 if (AsmRewritePrecedence[AsmRewriteA->Kind] <
4105 AsmRewritePrecedence[AsmRewriteB->Kind])
4107 llvm_unreachable("Unstable rewrite sort.");
4110 bool AsmParser::parseMSInlineAsm(
4111 void *AsmLoc, std::string &AsmString, unsigned &NumOutputs,
4112 unsigned &NumInputs, SmallVectorImpl<std::pair<void *, bool> > &OpDecls,
4113 SmallVectorImpl<std::string> &Constraints,
4114 SmallVectorImpl<std::string> &Clobbers, const MCInstrInfo *MII,
4115 const MCInstPrinter *IP, MCAsmParserSemaCallback &SI) {
4116 SmallVector<void *, 4> InputDecls;
4117 SmallVector<void *, 4> OutputDecls;
4118 SmallVector<bool, 4> InputDeclsAddressOf;
4119 SmallVector<bool, 4> OutputDeclsAddressOf;
4120 SmallVector<std::string, 4> InputConstraints;
4121 SmallVector<std::string, 4> OutputConstraints;
4122 SmallVector<unsigned, 4> ClobberRegs;
4124 SmallVector<AsmRewrite, 4> AsmStrRewrites;
4129 // While we have input, parse each statement.
4130 unsigned InputIdx = 0;
4131 unsigned OutputIdx = 0;
4132 while (getLexer().isNot(AsmToken::Eof)) {
4133 ParseStatementInfo Info(&AsmStrRewrites);
4134 if (parseStatement(Info))
4137 if (Info.ParseError)
4140 if (Info.Opcode == ~0U)
4143 const MCInstrDesc &Desc = MII->get(Info.Opcode);
4145 // Build the list of clobbers, outputs and inputs.
4146 for (unsigned i = 1, e = Info.ParsedOperands.size(); i != e; ++i) {
4147 MCParsedAsmOperand *Operand = Info.ParsedOperands[i];
4150 if (Operand->isImm())
4153 // Register operand.
4154 if (Operand->isReg() && !Operand->needAddressOf()) {
4155 unsigned NumDefs = Desc.getNumDefs();
4157 if (NumDefs && Operand->getMCOperandNum() < NumDefs)
4158 ClobberRegs.push_back(Operand->getReg());
4162 // Expr/Input or Output.
4163 StringRef SymName = Operand->getSymName();
4164 if (SymName.empty())
4167 void *OpDecl = Operand->getOpDecl();
4171 bool isOutput = (i == 1) && Desc.mayStore();
4172 SMLoc Start = SMLoc::getFromPointer(SymName.data());
4175 OutputDecls.push_back(OpDecl);
4176 OutputDeclsAddressOf.push_back(Operand->needAddressOf());
4177 OutputConstraints.push_back('=' + Operand->getConstraint().str());
4178 AsmStrRewrites.push_back(AsmRewrite(AOK_Output, Start, SymName.size()));
4180 InputDecls.push_back(OpDecl);
4181 InputDeclsAddressOf.push_back(Operand->needAddressOf());
4182 InputConstraints.push_back(Operand->getConstraint().str());
4183 AsmStrRewrites.push_back(AsmRewrite(AOK_Input, Start, SymName.size()));
4188 // Set the number of Outputs and Inputs.
4189 NumOutputs = OutputDecls.size();
4190 NumInputs = InputDecls.size();
4192 // Set the unique clobbers.
4193 array_pod_sort(ClobberRegs.begin(), ClobberRegs.end());
4194 ClobberRegs.erase(std::unique(ClobberRegs.begin(), ClobberRegs.end()),
4196 Clobbers.assign(ClobberRegs.size(), std::string());
4197 for (unsigned I = 0, E = ClobberRegs.size(); I != E; ++I) {
4198 raw_string_ostream OS(Clobbers[I]);
4199 IP->printRegName(OS, ClobberRegs[I]);
4202 // Merge the various outputs and inputs. Output are expected first.
4203 if (NumOutputs || NumInputs) {
4204 unsigned NumExprs = NumOutputs + NumInputs;
4205 OpDecls.resize(NumExprs);
4206 Constraints.resize(NumExprs);
4207 for (unsigned i = 0; i < NumOutputs; ++i) {
4208 OpDecls[i] = std::make_pair(OutputDecls[i], OutputDeclsAddressOf[i]);
4209 Constraints[i] = OutputConstraints[i];
4211 for (unsigned i = 0, j = NumOutputs; i < NumInputs; ++i, ++j) {
4212 OpDecls[j] = std::make_pair(InputDecls[i], InputDeclsAddressOf[i]);
4213 Constraints[j] = InputConstraints[i];
4217 // Build the IR assembly string.
4218 std::string AsmStringIR;
4219 raw_string_ostream OS(AsmStringIR);
4220 const char *AsmStart = SrcMgr.getMemoryBuffer(0)->getBufferStart();
4221 const char *AsmEnd = SrcMgr.getMemoryBuffer(0)->getBufferEnd();
4222 array_pod_sort(AsmStrRewrites.begin(), AsmStrRewrites.end(), rewritesSort);
4223 for (SmallVectorImpl<AsmRewrite>::iterator I = AsmStrRewrites.begin(),
4224 E = AsmStrRewrites.end();
4226 AsmRewriteKind Kind = (*I).Kind;
4227 if (Kind == AOK_Delete)
4230 const char *Loc = (*I).Loc.getPointer();
4231 assert(Loc >= AsmStart && "Expected Loc to be at or after Start!");
4233 // Emit everything up to the immediate/expression.
4234 unsigned Len = Loc - AsmStart;
4236 OS << StringRef(AsmStart, Len);
4238 // Skip the original expression.
4239 if (Kind == AOK_Skip) {
4240 AsmStart = Loc + (*I).Len;
4244 unsigned AdditionalSkip = 0;
4245 // Rewrite expressions in $N notation.
4250 OS << "$$" << (*I).Val;
4256 OS << '$' << InputIdx++;
4259 OS << '$' << OutputIdx++;
4261 case AOK_SizeDirective:
4264 case 8: OS << "byte ptr "; break;
4265 case 16: OS << "word ptr "; break;
4266 case 32: OS << "dword ptr "; break;
4267 case 64: OS << "qword ptr "; break;
4268 case 80: OS << "xword ptr "; break;
4269 case 128: OS << "xmmword ptr "; break;
4270 case 256: OS << "ymmword ptr "; break;
4277 unsigned Val = (*I).Val;
4278 OS << ".align " << Val;
4280 // Skip the original immediate.
4281 assert(Val < 10 && "Expected alignment less then 2^10.");
4282 AdditionalSkip = (Val < 4) ? 2 : Val < 7 ? 3 : 4;
4285 case AOK_DotOperator:
4290 // Skip the original expression.
4291 AsmStart = Loc + (*I).Len + AdditionalSkip;
4294 // Emit the remainder of the asm string.
4295 if (AsmStart != AsmEnd)
4296 OS << StringRef(AsmStart, AsmEnd - AsmStart);
4298 AsmString = OS.str();
4302 /// \brief Create an MCAsmParser instance.
4303 MCAsmParser *llvm::createMCAsmParser(SourceMgr &SM, MCContext &C,
4304 MCStreamer &Out, const MCAsmInfo &MAI) {
4305 return new AsmParser(SM, C, Out, MAI);