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 StringRef SymbolName = Identifier;
796 MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
797 std::pair<StringRef, StringRef> Split = Identifier.split('@');
799 if (Split.first.size() != Identifier.size() &&
800 FirstTokenKind != AsmToken::String) {
801 SymbolName = Split.first;
802 StringRef VariantName = Split.second;
804 // Lookup the symbol variant.
805 Variant = MCSymbolRefExpr::getVariantKindForName(VariantName);
806 if (Variant == MCSymbolRefExpr::VK_Invalid) {
807 Variant = MCSymbolRefExpr::VK_None;
808 return TokError("invalid variant '" + VariantName + "'");
812 MCSymbol *Sym = getContext().GetOrCreateSymbol(SymbolName);
814 // If this is an absolute variable reference, substitute it now to preserve
815 // semantics in the face of reassignment.
816 if (Sym->isVariable() && isa<MCConstantExpr>(Sym->getVariableValue())) {
818 return Error(EndLoc, "unexpected modifier on variable reference");
820 Res = Sym->getVariableValue();
824 // Otherwise create a symbol ref.
825 Res = MCSymbolRefExpr::Create(Sym, Variant, getContext());
828 case AsmToken::Integer: {
829 SMLoc Loc = getTok().getLoc();
830 int64_t IntVal = getTok().getIntVal();
831 Res = MCConstantExpr::Create(IntVal, getContext());
832 EndLoc = Lexer.getTok().getEndLoc();
834 // Look for 'b' or 'f' following an Integer as a directional label
835 if (Lexer.getKind() == AsmToken::Identifier) {
836 StringRef IDVal = getTok().getString();
837 // Lookup the symbol variant if used.
838 std::pair<StringRef, StringRef> Split = IDVal.split('@');
839 MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
840 if (Split.first.size() != IDVal.size()) {
841 Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
842 if (Variant == MCSymbolRefExpr::VK_Invalid) {
843 Variant = MCSymbolRefExpr::VK_None;
844 return TokError("invalid variant '" + Split.second + "'");
848 if (IDVal == "f" || IDVal == "b") {
850 Ctx.GetDirectionalLocalSymbol(IntVal, IDVal == "f" ? 1 : 0);
851 Res = MCSymbolRefExpr::Create(Sym, Variant, getContext());
852 if (IDVal == "b" && Sym->isUndefined())
853 return Error(Loc, "invalid reference to undefined symbol");
854 EndLoc = Lexer.getTok().getEndLoc();
855 Lex(); // Eat identifier.
860 case AsmToken::Real: {
861 APFloat RealVal(APFloat::IEEEdouble, getTok().getString());
862 uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue();
863 Res = MCConstantExpr::Create(IntVal, getContext());
864 EndLoc = Lexer.getTok().getEndLoc();
868 case AsmToken::Dot: {
869 // This is a '.' reference, which references the current PC. Emit a
870 // temporary label to the streamer and refer to it.
871 MCSymbol *Sym = Ctx.CreateTempSymbol();
873 Res = MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_None, getContext());
874 EndLoc = Lexer.getTok().getEndLoc();
875 Lex(); // Eat identifier.
878 case AsmToken::LParen:
879 Lex(); // Eat the '('.
880 return parseParenExpr(Res, EndLoc);
881 case AsmToken::LBrac:
882 if (!PlatformParser->HasBracketExpressions())
883 return TokError("brackets expression not supported on this target");
884 Lex(); // Eat the '['.
885 return parseBracketExpr(Res, EndLoc);
886 case AsmToken::Minus:
887 Lex(); // Eat the operator.
888 if (parsePrimaryExpr(Res, EndLoc))
890 Res = MCUnaryExpr::CreateMinus(Res, getContext());
893 Lex(); // Eat the operator.
894 if (parsePrimaryExpr(Res, EndLoc))
896 Res = MCUnaryExpr::CreatePlus(Res, getContext());
898 case AsmToken::Tilde:
899 Lex(); // Eat the operator.
900 if (parsePrimaryExpr(Res, EndLoc))
902 Res = MCUnaryExpr::CreateNot(Res, getContext());
907 bool AsmParser::parseExpression(const MCExpr *&Res) {
909 return parseExpression(Res, EndLoc);
913 AsmParser::applyModifierToExpr(const MCExpr *E,
914 MCSymbolRefExpr::VariantKind Variant) {
915 // Ask the target implementation about this expression first.
916 const MCExpr *NewE = getTargetParser().applyModifierToExpr(E, Variant, Ctx);
919 // Recurse over the given expression, rebuilding it to apply the given variant
920 // if there is exactly one symbol.
921 switch (E->getKind()) {
923 case MCExpr::Constant:
926 case MCExpr::SymbolRef: {
927 const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
929 if (SRE->getKind() != MCSymbolRefExpr::VK_None) {
930 TokError("invalid variant on expression '" + getTok().getIdentifier() +
931 "' (already modified)");
935 return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext());
938 case MCExpr::Unary: {
939 const MCUnaryExpr *UE = cast<MCUnaryExpr>(E);
940 const MCExpr *Sub = applyModifierToExpr(UE->getSubExpr(), Variant);
943 return MCUnaryExpr::Create(UE->getOpcode(), Sub, getContext());
946 case MCExpr::Binary: {
947 const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
948 const MCExpr *LHS = applyModifierToExpr(BE->getLHS(), Variant);
949 const MCExpr *RHS = applyModifierToExpr(BE->getRHS(), Variant);
959 return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext());
963 llvm_unreachable("Invalid expression kind!");
966 /// \brief Parse an expression and return it.
968 /// expr ::= expr &&,|| expr -> lowest.
969 /// expr ::= expr |,^,&,! expr
970 /// expr ::= expr ==,!=,<>,<,<=,>,>= expr
971 /// expr ::= expr <<,>> expr
972 /// expr ::= expr +,- expr
973 /// expr ::= expr *,/,% expr -> highest.
974 /// expr ::= primaryexpr
976 bool AsmParser::parseExpression(const MCExpr *&Res, SMLoc &EndLoc) {
977 // Parse the expression.
979 if (parsePrimaryExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc))
982 // As a special case, we support 'a op b @ modifier' by rewriting the
983 // expression to include the modifier. This is inefficient, but in general we
984 // expect users to use 'a@modifier op b'.
985 if (Lexer.getKind() == AsmToken::At) {
988 if (Lexer.isNot(AsmToken::Identifier))
989 return TokError("unexpected symbol modifier following '@'");
991 MCSymbolRefExpr::VariantKind Variant =
992 MCSymbolRefExpr::getVariantKindForName(getTok().getIdentifier());
993 if (Variant == MCSymbolRefExpr::VK_Invalid)
994 return TokError("invalid variant '" + getTok().getIdentifier() + "'");
996 const MCExpr *ModifiedRes = applyModifierToExpr(Res, Variant);
998 return TokError("invalid modifier '" + getTok().getIdentifier() +
999 "' (no symbols present)");
1006 // Try to constant fold it up front, if possible.
1008 if (Res->EvaluateAsAbsolute(Value))
1009 Res = MCConstantExpr::Create(Value, getContext());
1014 bool AsmParser::parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) {
1016 return parseParenExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc);
1019 bool AsmParser::parseAbsoluteExpression(int64_t &Res) {
1022 SMLoc StartLoc = Lexer.getLoc();
1023 if (parseExpression(Expr))
1026 if (!Expr->EvaluateAsAbsolute(Res))
1027 return Error(StartLoc, "expected absolute expression");
1032 static unsigned getBinOpPrecedence(AsmToken::TokenKind K,
1033 MCBinaryExpr::Opcode &Kind) {
1036 return 0; // not a binop.
1038 // Lowest Precedence: &&, ||
1039 case AsmToken::AmpAmp:
1040 Kind = MCBinaryExpr::LAnd;
1042 case AsmToken::PipePipe:
1043 Kind = MCBinaryExpr::LOr;
1046 // Low Precedence: |, &, ^
1048 // FIXME: gas seems to support '!' as an infix operator?
1049 case AsmToken::Pipe:
1050 Kind = MCBinaryExpr::Or;
1052 case AsmToken::Caret:
1053 Kind = MCBinaryExpr::Xor;
1056 Kind = MCBinaryExpr::And;
1059 // Low Intermediate Precedence: ==, !=, <>, <, <=, >, >=
1060 case AsmToken::EqualEqual:
1061 Kind = MCBinaryExpr::EQ;
1063 case AsmToken::ExclaimEqual:
1064 case AsmToken::LessGreater:
1065 Kind = MCBinaryExpr::NE;
1067 case AsmToken::Less:
1068 Kind = MCBinaryExpr::LT;
1070 case AsmToken::LessEqual:
1071 Kind = MCBinaryExpr::LTE;
1073 case AsmToken::Greater:
1074 Kind = MCBinaryExpr::GT;
1076 case AsmToken::GreaterEqual:
1077 Kind = MCBinaryExpr::GTE;
1080 // Intermediate Precedence: <<, >>
1081 case AsmToken::LessLess:
1082 Kind = MCBinaryExpr::Shl;
1084 case AsmToken::GreaterGreater:
1085 Kind = MCBinaryExpr::Shr;
1088 // High Intermediate Precedence: +, -
1089 case AsmToken::Plus:
1090 Kind = MCBinaryExpr::Add;
1092 case AsmToken::Minus:
1093 Kind = MCBinaryExpr::Sub;
1096 // Highest Precedence: *, /, %
1097 case AsmToken::Star:
1098 Kind = MCBinaryExpr::Mul;
1100 case AsmToken::Slash:
1101 Kind = MCBinaryExpr::Div;
1103 case AsmToken::Percent:
1104 Kind = MCBinaryExpr::Mod;
1109 /// \brief Parse all binary operators with precedence >= 'Precedence'.
1110 /// Res contains the LHS of the expression on input.
1111 bool AsmParser::parseBinOpRHS(unsigned Precedence, const MCExpr *&Res,
1114 MCBinaryExpr::Opcode Kind = MCBinaryExpr::Add;
1115 unsigned TokPrec = getBinOpPrecedence(Lexer.getKind(), Kind);
1117 // If the next token is lower precedence than we are allowed to eat, return
1118 // successfully with what we ate already.
1119 if (TokPrec < Precedence)
1124 // Eat the next primary expression.
1126 if (parsePrimaryExpr(RHS, EndLoc))
1129 // If BinOp binds less tightly with RHS than the operator after RHS, let
1130 // the pending operator take RHS as its LHS.
1131 MCBinaryExpr::Opcode Dummy;
1132 unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy);
1133 if (TokPrec < NextTokPrec && parseBinOpRHS(TokPrec + 1, RHS, EndLoc))
1136 // Merge LHS and RHS according to operator.
1137 Res = MCBinaryExpr::Create(Kind, Res, RHS, getContext());
1142 /// ::= EndOfStatement
1143 /// ::= Label* Directive ...Operands... EndOfStatement
1144 /// ::= Label* Identifier OperandList* EndOfStatement
1145 bool AsmParser::parseStatement(ParseStatementInfo &Info) {
1146 if (Lexer.is(AsmToken::EndOfStatement)) {
1152 // Statements always start with an identifier or are a full line comment.
1153 AsmToken ID = getTok();
1154 SMLoc IDLoc = ID.getLoc();
1156 int64_t LocalLabelVal = -1;
1157 // A full line comment is a '#' as the first token.
1158 if (Lexer.is(AsmToken::Hash))
1159 return parseCppHashLineFilenameComment(IDLoc);
1161 // Allow an integer followed by a ':' as a directional local label.
1162 if (Lexer.is(AsmToken::Integer)) {
1163 LocalLabelVal = getTok().getIntVal();
1164 if (LocalLabelVal < 0) {
1165 if (!TheCondState.Ignore)
1166 return TokError("unexpected token at start of statement");
1169 IDVal = getTok().getString();
1170 Lex(); // Consume the integer token to be used as an identifier token.
1171 if (Lexer.getKind() != AsmToken::Colon) {
1172 if (!TheCondState.Ignore)
1173 return TokError("unexpected token at start of statement");
1176 } else if (Lexer.is(AsmToken::Dot)) {
1177 // Treat '.' as a valid identifier in this context.
1180 } else if (parseIdentifier(IDVal)) {
1181 if (!TheCondState.Ignore)
1182 return TokError("unexpected token at start of statement");
1186 // Handle conditional assembly here before checking for skipping. We
1187 // have to do this so that .endif isn't skipped in a ".if 0" block for
1189 StringMap<DirectiveKind>::const_iterator DirKindIt =
1190 DirectiveKindMap.find(IDVal);
1191 DirectiveKind DirKind = (DirKindIt == DirectiveKindMap.end())
1193 : DirKindIt->getValue();
1198 return parseDirectiveIf(IDLoc);
1200 return parseDirectiveIfb(IDLoc, true);
1202 return parseDirectiveIfb(IDLoc, false);
1204 return parseDirectiveIfc(IDLoc, true);
1206 return parseDirectiveIfc(IDLoc, false);
1208 return parseDirectiveIfdef(IDLoc, true);
1211 return parseDirectiveIfdef(IDLoc, false);
1213 return parseDirectiveElseIf(IDLoc);
1215 return parseDirectiveElse(IDLoc);
1217 return parseDirectiveEndIf(IDLoc);
1220 // Ignore the statement if in the middle of inactive conditional
1222 if (TheCondState.Ignore) {
1223 eatToEndOfStatement();
1227 // FIXME: Recurse on local labels?
1229 // See what kind of statement we have.
1230 switch (Lexer.getKind()) {
1231 case AsmToken::Colon: {
1232 checkForValidSection();
1234 // identifier ':' -> Label.
1237 // Diagnose attempt to use '.' as a label.
1239 return Error(IDLoc, "invalid use of pseudo-symbol '.' as a label");
1241 // Diagnose attempt to use a variable as a label.
1243 // FIXME: Diagnostics. Note the location of the definition as a label.
1244 // FIXME: This doesn't diagnose assignment to a symbol which has been
1245 // implicitly marked as external.
1247 if (LocalLabelVal == -1)
1248 Sym = getContext().GetOrCreateSymbol(IDVal);
1250 Sym = Ctx.CreateDirectionalLocalSymbol(LocalLabelVal);
1251 if (!Sym->isUndefined() || Sym->isVariable())
1252 return Error(IDLoc, "invalid symbol redefinition");
1255 if (!ParsingInlineAsm)
1258 // If we are generating dwarf for assembly source files then gather the
1259 // info to make a dwarf label entry for this label if needed.
1260 if (getContext().getGenDwarfForAssembly())
1261 MCGenDwarfLabelEntry::Make(Sym, &getStreamer(), getSourceManager(),
1264 // Consume any end of statement token, if present, to avoid spurious
1265 // AddBlankLine calls().
1266 if (Lexer.is(AsmToken::EndOfStatement)) {
1268 if (Lexer.is(AsmToken::Eof))
1275 case AsmToken::Equal:
1276 // identifier '=' ... -> assignment statement
1279 return parseAssignment(IDVal, true);
1281 default: // Normal instruction or directive.
1285 // If macros are enabled, check to see if this is a macro instantiation.
1286 if (areMacrosEnabled())
1287 if (const MCAsmMacro *M = lookupMacro(IDVal)) {
1288 return handleMacroEntry(M, IDLoc);
1291 // Otherwise, we have a normal instruction or directive.
1293 // Directives start with "."
1294 if (IDVal[0] == '.' && IDVal != ".") {
1295 // There are several entities interested in parsing directives:
1297 // 1. The target-specific assembly parser. Some directives are target
1298 // specific or may potentially behave differently on certain targets.
1299 // 2. Asm parser extensions. For example, platform-specific parsers
1300 // (like the ELF parser) register themselves as extensions.
1301 // 3. The generic directive parser implemented by this class. These are
1302 // all the directives that behave in a target and platform independent
1303 // manner, or at least have a default behavior that's shared between
1304 // all targets and platforms.
1306 // First query the target-specific parser. It will return 'true' if it
1307 // isn't interested in this directive.
1308 if (!getTargetParser().ParseDirective(ID))
1311 // Next, check the extention directive map to see if any extension has
1312 // registered itself to parse this directive.
1313 std::pair<MCAsmParserExtension *, DirectiveHandler> Handler =
1314 ExtensionDirectiveMap.lookup(IDVal);
1316 return (*Handler.second)(Handler.first, IDVal, IDLoc);
1318 // Finally, if no one else is interested in this directive, it must be
1319 // generic and familiar to this class.
1325 return parseDirectiveSet(IDVal, true);
1327 return parseDirectiveSet(IDVal, false);
1329 return parseDirectiveAscii(IDVal, false);
1332 return parseDirectiveAscii(IDVal, true);
1334 return parseDirectiveValue(1);
1338 return parseDirectiveValue(2);
1342 return parseDirectiveValue(4);
1345 return parseDirectiveValue(8);
1348 return parseDirectiveRealValue(APFloat::IEEEsingle);
1350 return parseDirectiveRealValue(APFloat::IEEEdouble);
1352 bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
1353 return parseDirectiveAlign(IsPow2, /*ExprSize=*/1);
1356 bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
1357 return parseDirectiveAlign(IsPow2, /*ExprSize=*/4);
1360 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1);
1362 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2);
1364 return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4);
1366 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1);
1368 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2);
1370 return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4);
1372 return parseDirectiveOrg();
1374 return parseDirectiveFill();
1376 return parseDirectiveZero();
1378 eatToEndOfStatement(); // .extern is the default, ignore it.
1382 return parseDirectiveSymbolAttribute(MCSA_Global);
1383 case DK_LAZY_REFERENCE:
1384 return parseDirectiveSymbolAttribute(MCSA_LazyReference);
1385 case DK_NO_DEAD_STRIP:
1386 return parseDirectiveSymbolAttribute(MCSA_NoDeadStrip);
1387 case DK_SYMBOL_RESOLVER:
1388 return parseDirectiveSymbolAttribute(MCSA_SymbolResolver);
1389 case DK_PRIVATE_EXTERN:
1390 return parseDirectiveSymbolAttribute(MCSA_PrivateExtern);
1392 return parseDirectiveSymbolAttribute(MCSA_Reference);
1393 case DK_WEAK_DEFINITION:
1394 return parseDirectiveSymbolAttribute(MCSA_WeakDefinition);
1395 case DK_WEAK_REFERENCE:
1396 return parseDirectiveSymbolAttribute(MCSA_WeakReference);
1397 case DK_WEAK_DEF_CAN_BE_HIDDEN:
1398 return parseDirectiveSymbolAttribute(MCSA_WeakDefAutoPrivate);
1401 return parseDirectiveComm(/*IsLocal=*/false);
1403 return parseDirectiveComm(/*IsLocal=*/true);
1405 return parseDirectiveAbort();
1407 return parseDirectiveInclude();
1409 return parseDirectiveIncbin();
1412 return TokError(Twine(IDVal) + " not supported yet");
1414 return parseDirectiveRept(IDLoc);
1416 return parseDirectiveIrp(IDLoc);
1418 return parseDirectiveIrpc(IDLoc);
1420 return parseDirectiveEndr(IDLoc);
1421 case DK_BUNDLE_ALIGN_MODE:
1422 return parseDirectiveBundleAlignMode();
1423 case DK_BUNDLE_LOCK:
1424 return parseDirectiveBundleLock();
1425 case DK_BUNDLE_UNLOCK:
1426 return parseDirectiveBundleUnlock();
1428 return parseDirectiveLEB128(true);
1430 return parseDirectiveLEB128(false);
1433 return parseDirectiveSpace(IDVal);
1435 return parseDirectiveFile(IDLoc);
1437 return parseDirectiveLine();
1439 return parseDirectiveLoc();
1441 return parseDirectiveStabs();
1442 case DK_CFI_SECTIONS:
1443 return parseDirectiveCFISections();
1444 case DK_CFI_STARTPROC:
1445 return parseDirectiveCFIStartProc();
1446 case DK_CFI_ENDPROC:
1447 return parseDirectiveCFIEndProc();
1448 case DK_CFI_DEF_CFA:
1449 return parseDirectiveCFIDefCfa(IDLoc);
1450 case DK_CFI_DEF_CFA_OFFSET:
1451 return parseDirectiveCFIDefCfaOffset();
1452 case DK_CFI_ADJUST_CFA_OFFSET:
1453 return parseDirectiveCFIAdjustCfaOffset();
1454 case DK_CFI_DEF_CFA_REGISTER:
1455 return parseDirectiveCFIDefCfaRegister(IDLoc);
1457 return parseDirectiveCFIOffset(IDLoc);
1458 case DK_CFI_REL_OFFSET:
1459 return parseDirectiveCFIRelOffset(IDLoc);
1460 case DK_CFI_PERSONALITY:
1461 return parseDirectiveCFIPersonalityOrLsda(true);
1463 return parseDirectiveCFIPersonalityOrLsda(false);
1464 case DK_CFI_REMEMBER_STATE:
1465 return parseDirectiveCFIRememberState();
1466 case DK_CFI_RESTORE_STATE:
1467 return parseDirectiveCFIRestoreState();
1468 case DK_CFI_SAME_VALUE:
1469 return parseDirectiveCFISameValue(IDLoc);
1470 case DK_CFI_RESTORE:
1471 return parseDirectiveCFIRestore(IDLoc);
1473 return parseDirectiveCFIEscape();
1474 case DK_CFI_SIGNAL_FRAME:
1475 return parseDirectiveCFISignalFrame();
1476 case DK_CFI_UNDEFINED:
1477 return parseDirectiveCFIUndefined(IDLoc);
1478 case DK_CFI_REGISTER:
1479 return parseDirectiveCFIRegister(IDLoc);
1480 case DK_CFI_WINDOW_SAVE:
1481 return parseDirectiveCFIWindowSave();
1484 return parseDirectiveMacrosOnOff(IDVal);
1486 return parseDirectiveMacro(IDLoc);
1489 return parseDirectiveEndMacro(IDVal);
1491 return parseDirectivePurgeMacro(IDLoc);
1494 return Error(IDLoc, "unknown directive");
1497 // __asm _emit or __asm __emit
1498 if (ParsingInlineAsm && (IDVal == "_emit" || IDVal == "__emit" ||
1499 IDVal == "_EMIT" || IDVal == "__EMIT"))
1500 return parseDirectiveMSEmit(IDLoc, Info, IDVal.size());
1503 if (ParsingInlineAsm && (IDVal == "align" || IDVal == "ALIGN"))
1504 return parseDirectiveMSAlign(IDLoc, Info);
1506 checkForValidSection();
1508 // Canonicalize the opcode to lower case.
1509 std::string OpcodeStr = IDVal.lower();
1510 ParseInstructionInfo IInfo(Info.AsmRewrites);
1511 bool HadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr, IDLoc,
1512 Info.ParsedOperands);
1513 Info.ParseError = HadError;
1515 // Dump the parsed representation, if requested.
1516 if (getShowParsedOperands()) {
1517 SmallString<256> Str;
1518 raw_svector_ostream OS(Str);
1519 OS << "parsed instruction: [";
1520 for (unsigned i = 0; i != Info.ParsedOperands.size(); ++i) {
1523 Info.ParsedOperands[i]->print(OS);
1527 printMessage(IDLoc, SourceMgr::DK_Note, OS.str());
1530 // If we are generating dwarf for assembly source files and the current
1531 // section is the initial text section then generate a .loc directive for
1533 if (!HadError && getContext().getGenDwarfForAssembly() &&
1534 getContext().getGenDwarfSection() ==
1535 getStreamer().getCurrentSection().first) {
1537 unsigned Line = SrcMgr.FindLineNumber(IDLoc, CurBuffer);
1539 // If we previously parsed a cpp hash file line comment then make sure the
1540 // current Dwarf File is for the CppHashFilename if not then emit the
1541 // Dwarf File table for it and adjust the line number for the .loc.
1542 const SmallVectorImpl<MCDwarfFile *> &MCDwarfFiles =
1543 getContext().getMCDwarfFiles();
1544 if (CppHashFilename.size() != 0) {
1545 if (MCDwarfFiles[getContext().getGenDwarfFileNumber()]->getName() !=
1547 getStreamer().EmitDwarfFileDirective(
1548 getContext().nextGenDwarfFileNumber(), StringRef(),
1551 // Since SrcMgr.FindLineNumber() is slow and messes up the SourceMgr's
1552 // cache with the different Loc from the call above we save the last
1553 // info we queried here with SrcMgr.FindLineNumber().
1554 unsigned CppHashLocLineNo;
1555 if (LastQueryIDLoc == CppHashLoc && LastQueryBuffer == CppHashBuf)
1556 CppHashLocLineNo = LastQueryLine;
1558 CppHashLocLineNo = SrcMgr.FindLineNumber(CppHashLoc, CppHashBuf);
1559 LastQueryLine = CppHashLocLineNo;
1560 LastQueryIDLoc = CppHashLoc;
1561 LastQueryBuffer = CppHashBuf;
1563 Line = CppHashLineNumber - 1 + (Line - CppHashLocLineNo);
1566 getStreamer().EmitDwarfLocDirective(
1567 getContext().getGenDwarfFileNumber(), Line, 0,
1568 DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0, 0, 0,
1572 // If parsing succeeded, match the instruction.
1575 HadError = getTargetParser().MatchAndEmitInstruction(
1576 IDLoc, Info.Opcode, Info.ParsedOperands, Out, ErrorInfo,
1580 // Don't skip the rest of the line, the instruction parser is responsible for
1585 /// eatToEndOfLine uses the Lexer to eat the characters to the end of the line
1586 /// since they may not be able to be tokenized to get to the end of line token.
1587 void AsmParser::eatToEndOfLine() {
1588 if (!Lexer.is(AsmToken::EndOfStatement))
1589 Lexer.LexUntilEndOfLine();
1594 /// parseCppHashLineFilenameComment as this:
1595 /// ::= # number "filename"
1596 /// or just as a full line comment if it doesn't have a number and a string.
1597 bool AsmParser::parseCppHashLineFilenameComment(const SMLoc &L) {
1598 Lex(); // Eat the hash token.
1600 if (getLexer().isNot(AsmToken::Integer)) {
1601 // Consume the line since in cases it is not a well-formed line directive,
1602 // as if were simply a full line comment.
1607 int64_t LineNumber = getTok().getIntVal();
1610 if (getLexer().isNot(AsmToken::String)) {
1615 StringRef Filename = getTok().getString();
1616 // Get rid of the enclosing quotes.
1617 Filename = Filename.substr(1, Filename.size() - 2);
1619 // Save the SMLoc, Filename and LineNumber for later use by diagnostics.
1621 CppHashFilename = Filename;
1622 CppHashLineNumber = LineNumber;
1623 CppHashBuf = CurBuffer;
1625 // Ignore any trailing characters, they're just comment.
1630 /// \brief will use the last parsed cpp hash line filename comment
1631 /// for the Filename and LineNo if any in the diagnostic.
1632 void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) {
1633 const AsmParser *Parser = static_cast<const AsmParser *>(Context);
1634 raw_ostream &OS = errs();
1636 const SourceMgr &DiagSrcMgr = *Diag.getSourceMgr();
1637 const SMLoc &DiagLoc = Diag.getLoc();
1638 int DiagBuf = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
1639 int CppHashBuf = Parser->SrcMgr.FindBufferContainingLoc(Parser->CppHashLoc);
1641 // Like SourceMgr::printMessage() we need to print the include stack if any
1642 // before printing the message.
1643 int DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
1644 if (!Parser->SavedDiagHandler && DiagCurBuffer > 0) {
1645 SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(DiagCurBuffer);
1646 DiagSrcMgr.PrintIncludeStack(ParentIncludeLoc, OS);
1649 // If we have not parsed a cpp hash line filename comment or the source
1650 // manager changed or buffer changed (like in a nested include) then just
1651 // print the normal diagnostic using its Filename and LineNo.
1652 if (!Parser->CppHashLineNumber || &DiagSrcMgr != &Parser->SrcMgr ||
1653 DiagBuf != CppHashBuf) {
1654 if (Parser->SavedDiagHandler)
1655 Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
1661 // Use the CppHashFilename and calculate a line number based on the
1662 // CppHashLoc and CppHashLineNumber relative to this Diag's SMLoc for
1664 const std::string &Filename = Parser->CppHashFilename;
1666 int DiagLocLineNo = DiagSrcMgr.FindLineNumber(DiagLoc, DiagBuf);
1667 int CppHashLocLineNo =
1668 Parser->SrcMgr.FindLineNumber(Parser->CppHashLoc, CppHashBuf);
1670 Parser->CppHashLineNumber - 1 + (DiagLocLineNo - CppHashLocLineNo);
1672 SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(), Filename, LineNo,
1673 Diag.getColumnNo(), Diag.getKind(), Diag.getMessage(),
1674 Diag.getLineContents(), Diag.getRanges());
1676 if (Parser->SavedDiagHandler)
1677 Parser->SavedDiagHandler(NewDiag, Parser->SavedDiagContext);
1679 NewDiag.print(0, OS);
1682 // FIXME: This is mostly duplicated from the function in AsmLexer.cpp. The
1683 // difference being that that function accepts '@' as part of identifiers and
1684 // we can't do that. AsmLexer.cpp should probably be changed to handle
1685 // '@' as a special case when needed.
1686 static bool isIdentifierChar(char c) {
1687 return isalnum(static_cast<unsigned char>(c)) || c == '_' || c == '$' ||
1691 bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body,
1692 const MCAsmMacroParameters &Parameters,
1693 const MCAsmMacroArguments &A, const SMLoc &L) {
1694 unsigned NParameters = Parameters.size();
1695 if (NParameters != 0 && NParameters != A.size())
1696 return Error(L, "Wrong number of arguments");
1698 // A macro without parameters is handled differently on Darwin:
1699 // gas accepts no arguments and does no substitutions
1700 while (!Body.empty()) {
1701 // Scan for the next substitution.
1702 std::size_t End = Body.size(), Pos = 0;
1703 for (; Pos != End; ++Pos) {
1704 // Check for a substitution or escape.
1706 // This macro has no parameters, look for $0, $1, etc.
1707 if (Body[Pos] != '$' || Pos + 1 == End)
1710 char Next = Body[Pos + 1];
1711 if (Next == '$' || Next == 'n' ||
1712 isdigit(static_cast<unsigned char>(Next)))
1715 // This macro has parameters, look for \foo, \bar, etc.
1716 if (Body[Pos] == '\\' && Pos + 1 != End)
1722 OS << Body.slice(0, Pos);
1724 // Check if we reached the end.
1729 switch (Body[Pos + 1]) {
1735 // $n => number of arguments
1740 // $[0-9] => argument
1742 // Missing arguments are ignored.
1743 unsigned Index = Body[Pos + 1] - '0';
1744 if (Index >= A.size())
1747 // Otherwise substitute with the token values, with spaces eliminated.
1748 for (MCAsmMacroArgument::const_iterator it = A[Index].begin(),
1749 ie = A[Index].end();
1751 OS << it->getString();
1757 unsigned I = Pos + 1;
1758 while (isIdentifierChar(Body[I]) && I + 1 != End)
1761 const char *Begin = Body.data() + Pos + 1;
1762 StringRef Argument(Begin, I - (Pos + 1));
1764 for (; Index < NParameters; ++Index)
1765 if (Parameters[Index].first == Argument)
1768 if (Index == NParameters) {
1769 if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
1772 OS << '\\' << Argument;
1776 for (MCAsmMacroArgument::const_iterator it = A[Index].begin(),
1777 ie = A[Index].end();
1779 if (it->getKind() == AsmToken::String)
1780 OS << it->getStringContents();
1782 OS << it->getString();
1784 Pos += 1 + Argument.size();
1787 // Update the scan point.
1788 Body = Body.substr(Pos);
1794 MacroInstantiation::MacroInstantiation(const MCAsmMacro *M, SMLoc IL, int EB,
1795 SMLoc EL, MemoryBuffer *I)
1796 : TheMacro(M), Instantiation(I), InstantiationLoc(IL), ExitBuffer(EB),
1799 static bool isOperator(AsmToken::TokenKind kind) {
1803 case AsmToken::Plus:
1804 case AsmToken::Minus:
1805 case AsmToken::Tilde:
1806 case AsmToken::Slash:
1807 case AsmToken::Star:
1809 case AsmToken::Equal:
1810 case AsmToken::EqualEqual:
1811 case AsmToken::Pipe:
1812 case AsmToken::PipePipe:
1813 case AsmToken::Caret:
1815 case AsmToken::AmpAmp:
1816 case AsmToken::Exclaim:
1817 case AsmToken::ExclaimEqual:
1818 case AsmToken::Percent:
1819 case AsmToken::Less:
1820 case AsmToken::LessEqual:
1821 case AsmToken::LessLess:
1822 case AsmToken::LessGreater:
1823 case AsmToken::Greater:
1824 case AsmToken::GreaterEqual:
1825 case AsmToken::GreaterGreater:
1830 bool AsmParser::parseMacroArgument(MCAsmMacroArgument &MA,
1831 AsmToken::TokenKind &ArgumentDelimiter) {
1832 unsigned ParenLevel = 0;
1833 unsigned AddTokens = 0;
1835 // gas accepts arguments separated by whitespace, except on Darwin
1837 Lexer.setSkipSpace(false);
1840 if (Lexer.is(AsmToken::Eof) || Lexer.is(AsmToken::Equal)) {
1841 Lexer.setSkipSpace(true);
1842 return TokError("unexpected token in macro instantiation");
1845 if (ParenLevel == 0 && Lexer.is(AsmToken::Comma)) {
1846 // Spaces and commas cannot be mixed to delimit parameters
1847 if (ArgumentDelimiter == AsmToken::Eof)
1848 ArgumentDelimiter = AsmToken::Comma;
1849 else if (ArgumentDelimiter != AsmToken::Comma) {
1850 Lexer.setSkipSpace(true);
1851 return TokError("expected ' ' for macro argument separator");
1856 if (Lexer.is(AsmToken::Space)) {
1857 Lex(); // Eat spaces
1859 // Spaces can delimit parameters, but could also be part an expression.
1860 // If the token after a space is an operator, add the token and the next
1861 // one into this argument
1862 if (ArgumentDelimiter == AsmToken::Space ||
1863 ArgumentDelimiter == AsmToken::Eof) {
1864 if (isOperator(Lexer.getKind())) {
1865 // Check to see whether the token is used as an operator,
1866 // or part of an identifier
1867 const char *NextChar = getTok().getEndLoc().getPointer();
1868 if (*NextChar == ' ')
1872 if (!AddTokens && ParenLevel == 0) {
1873 if (ArgumentDelimiter == AsmToken::Eof &&
1874 !isOperator(Lexer.getKind()))
1875 ArgumentDelimiter = AsmToken::Space;
1881 // handleMacroEntry relies on not advancing the lexer here
1882 // to be able to fill in the remaining default parameter values
1883 if (Lexer.is(AsmToken::EndOfStatement))
1886 // Adjust the current parentheses level.
1887 if (Lexer.is(AsmToken::LParen))
1889 else if (Lexer.is(AsmToken::RParen) && ParenLevel)
1892 // Append the token to the current argument list.
1893 MA.push_back(getTok());
1899 Lexer.setSkipSpace(true);
1900 if (ParenLevel != 0)
1901 return TokError("unbalanced parentheses in macro argument");
1905 // Parse the macro instantiation arguments.
1906 bool AsmParser::parseMacroArguments(const MCAsmMacro *M,
1907 MCAsmMacroArguments &A) {
1908 const unsigned NParameters = M ? M->Parameters.size() : 0;
1909 // Argument delimiter is initially unknown. It will be set by
1910 // parseMacroArgument()
1911 AsmToken::TokenKind ArgumentDelimiter = AsmToken::Eof;
1913 // Parse two kinds of macro invocations:
1914 // - macros defined without any parameters accept an arbitrary number of them
1915 // - macros defined with parameters accept at most that many of them
1916 for (unsigned Parameter = 0; !NParameters || Parameter < NParameters;
1918 MCAsmMacroArgument MA;
1920 if (parseMacroArgument(MA, ArgumentDelimiter))
1923 if (!MA.empty() || !NParameters)
1925 else if (NParameters) {
1926 if (!M->Parameters[Parameter].second.empty())
1927 A.push_back(M->Parameters[Parameter].second);
1930 // At the end of the statement, fill in remaining arguments that have
1931 // default values. If there aren't any, then the next argument is
1932 // required but missing
1933 if (Lexer.is(AsmToken::EndOfStatement)) {
1934 if (NParameters && Parameter < NParameters - 1) {
1935 if (M->Parameters[Parameter + 1].second.empty())
1936 return TokError("macro argument '" +
1937 Twine(M->Parameters[Parameter + 1].first) +
1945 if (Lexer.is(AsmToken::Comma))
1948 return TokError("Too many arguments");
1951 const MCAsmMacro *AsmParser::lookupMacro(StringRef Name) {
1952 StringMap<MCAsmMacro *>::iterator I = MacroMap.find(Name);
1953 return (I == MacroMap.end()) ? NULL : I->getValue();
1956 void AsmParser::defineMacro(StringRef Name, const MCAsmMacro &Macro) {
1957 MacroMap[Name] = new MCAsmMacro(Macro);
1960 void AsmParser::undefineMacro(StringRef Name) {
1961 StringMap<MCAsmMacro *>::iterator I = MacroMap.find(Name);
1962 if (I != MacroMap.end()) {
1963 delete I->getValue();
1968 bool AsmParser::handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc) {
1969 // Arbitrarily limit macro nesting depth, to match 'as'. We can eliminate
1970 // this, although we should protect against infinite loops.
1971 if (ActiveMacros.size() == 20)
1972 return TokError("macros cannot be nested more than 20 levels deep");
1974 MCAsmMacroArguments A;
1975 if (parseMacroArguments(M, A))
1978 // Remove any trailing empty arguments. Do this after-the-fact as we have
1979 // to keep empty arguments in the middle of the list or positionality
1980 // gets off. e.g., "foo 1, , 2" vs. "foo 1, 2,"
1981 while (!A.empty() && A.back().empty())
1984 // Macro instantiation is lexical, unfortunately. We construct a new buffer
1985 // to hold the macro body with substitutions.
1986 SmallString<256> Buf;
1987 StringRef Body = M->Body;
1988 raw_svector_ostream OS(Buf);
1990 if (expandMacro(OS, Body, M->Parameters, A, getTok().getLoc()))
1993 // We include the .endmacro in the buffer as our cue to exit the macro
1995 OS << ".endmacro\n";
1997 MemoryBuffer *Instantiation =
1998 MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
2000 // Create the macro instantiation object and add to the current macro
2001 // instantiation stack.
2002 MacroInstantiation *MI = new MacroInstantiation(
2003 M, NameLoc, CurBuffer, getTok().getLoc(), Instantiation);
2004 ActiveMacros.push_back(MI);
2006 // Jump to the macro instantiation and prime the lexer.
2007 CurBuffer = SrcMgr.AddNewSourceBuffer(MI->Instantiation, SMLoc());
2008 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
2014 void AsmParser::handleMacroExit() {
2015 // Jump to the EndOfStatement we should return to, and consume it.
2016 jumpToLoc(ActiveMacros.back()->ExitLoc, ActiveMacros.back()->ExitBuffer);
2019 // Pop the instantiation entry.
2020 delete ActiveMacros.back();
2021 ActiveMacros.pop_back();
2024 static bool isUsedIn(const MCSymbol *Sym, const MCExpr *Value) {
2025 switch (Value->getKind()) {
2026 case MCExpr::Binary: {
2027 const MCBinaryExpr *BE = static_cast<const MCBinaryExpr *>(Value);
2028 return isUsedIn(Sym, BE->getLHS()) || isUsedIn(Sym, BE->getRHS());
2030 case MCExpr::Target:
2031 case MCExpr::Constant:
2033 case MCExpr::SymbolRef: {
2035 static_cast<const MCSymbolRefExpr *>(Value)->getSymbol();
2037 return isUsedIn(Sym, S.getVariableValue());
2041 return isUsedIn(Sym, static_cast<const MCUnaryExpr *>(Value)->getSubExpr());
2044 llvm_unreachable("Unknown expr kind!");
2047 bool AsmParser::parseAssignment(StringRef Name, bool allow_redef,
2049 // FIXME: Use better location, we should use proper tokens.
2050 SMLoc EqualLoc = Lexer.getLoc();
2052 const MCExpr *Value;
2053 if (parseExpression(Value))
2056 // Note: we don't count b as used in "a = b". This is to allow
2060 if (Lexer.isNot(AsmToken::EndOfStatement))
2061 return TokError("unexpected token in assignment");
2063 // Error on assignment to '.'.
2065 return Error(EqualLoc, ("assignment to pseudo-symbol '.' is unsupported "
2066 "(use '.space' or '.org').)"));
2069 // Eat the end of statement marker.
2072 // Validate that the LHS is allowed to be a variable (either it has not been
2073 // used as a symbol, or it is an absolute symbol).
2074 MCSymbol *Sym = getContext().LookupSymbol(Name);
2076 // Diagnose assignment to a label.
2078 // FIXME: Diagnostics. Note the location of the definition as a label.
2079 // FIXME: Diagnose assignment to protected identifier (e.g., register name).
2080 if (isUsedIn(Sym, Value))
2081 return Error(EqualLoc, "Recursive use of '" + Name + "'");
2082 else if (Sym->isUndefined() && !Sym->isUsed() && !Sym->isVariable())
2083 ; // Allow redefinitions of undefined symbols only used in directives.
2084 else if (Sym->isVariable() && !Sym->isUsed() && allow_redef)
2085 ; // Allow redefinitions of variables that haven't yet been used.
2086 else if (!Sym->isUndefined() && (!Sym->isVariable() || !allow_redef))
2087 return Error(EqualLoc, "redefinition of '" + Name + "'");
2088 else if (!Sym->isVariable())
2089 return Error(EqualLoc, "invalid assignment to '" + Name + "'");
2090 else if (!isa<MCConstantExpr>(Sym->getVariableValue()))
2091 return Error(EqualLoc, "invalid reassignment of non-absolute variable '" +
2094 // Don't count these checks as uses.
2095 Sym->setUsed(false);
2097 Sym = getContext().GetOrCreateSymbol(Name);
2099 // FIXME: Handle '.'.
2101 // Do the assignment.
2102 Out.EmitAssignment(Sym, Value);
2104 Out.EmitSymbolAttribute(Sym, MCSA_NoDeadStrip);
2109 /// parseIdentifier:
2112 bool AsmParser::parseIdentifier(StringRef &Res) {
2113 // The assembler has relaxed rules for accepting identifiers, in particular we
2114 // allow things like '.globl $foo', which would normally be separate
2115 // tokens. At this level, we have already lexed so we cannot (currently)
2116 // handle this as a context dependent token, instead we detect adjacent tokens
2117 // and return the combined identifier.
2118 if (Lexer.is(AsmToken::Dollar)) {
2119 SMLoc DollarLoc = getLexer().getLoc();
2121 // Consume the dollar sign, and check for a following identifier.
2123 if (Lexer.isNot(AsmToken::Identifier))
2126 // We have a '$' followed by an identifier, make sure they are adjacent.
2127 if (DollarLoc.getPointer() + 1 != getTok().getLoc().getPointer())
2130 // Construct the joined identifier and consume the token.
2132 StringRef(DollarLoc.getPointer(), getTok().getIdentifier().size() + 1);
2137 if (Lexer.isNot(AsmToken::Identifier) && Lexer.isNot(AsmToken::String))
2140 Res = getTok().getIdentifier();
2142 Lex(); // Consume the identifier token.
2147 /// parseDirectiveSet:
2148 /// ::= .equ identifier ',' expression
2149 /// ::= .equiv identifier ',' expression
2150 /// ::= .set identifier ',' expression
2151 bool AsmParser::parseDirectiveSet(StringRef IDVal, bool allow_redef) {
2154 if (parseIdentifier(Name))
2155 return TokError("expected identifier after '" + Twine(IDVal) + "'");
2157 if (getLexer().isNot(AsmToken::Comma))
2158 return TokError("unexpected token in '" + Twine(IDVal) + "'");
2161 return parseAssignment(Name, allow_redef, true);
2164 bool AsmParser::parseEscapedString(std::string &Data) {
2165 assert(getLexer().is(AsmToken::String) && "Unexpected current token!");
2168 StringRef Str = getTok().getStringContents();
2169 for (unsigned i = 0, e = Str.size(); i != e; ++i) {
2170 if (Str[i] != '\\') {
2175 // Recognize escaped characters. Note that this escape semantics currently
2176 // loosely follows Darwin 'as'. Notably, it doesn't support hex escapes.
2179 return TokError("unexpected backslash at end of string");
2181 // Recognize octal sequences.
2182 if ((unsigned)(Str[i] - '0') <= 7) {
2183 // Consume up to three octal characters.
2184 unsigned Value = Str[i] - '0';
2186 if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
2188 Value = Value * 8 + (Str[i] - '0');
2190 if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
2192 Value = Value * 8 + (Str[i] - '0');
2197 return TokError("invalid octal escape sequence (out of range)");
2199 Data += (unsigned char)Value;
2203 // Otherwise recognize individual escapes.
2206 // Just reject invalid escape sequences for now.
2207 return TokError("invalid escape sequence (unrecognized character)");
2209 case 'b': Data += '\b'; break;
2210 case 'f': Data += '\f'; break;
2211 case 'n': Data += '\n'; break;
2212 case 'r': Data += '\r'; break;
2213 case 't': Data += '\t'; break;
2214 case '"': Data += '"'; break;
2215 case '\\': Data += '\\'; break;
2222 /// parseDirectiveAscii:
2223 /// ::= ( .ascii | .asciz | .string ) [ "string" ( , "string" )* ]
2224 bool AsmParser::parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) {
2225 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2226 checkForValidSection();
2229 if (getLexer().isNot(AsmToken::String))
2230 return TokError("expected string in '" + Twine(IDVal) + "' directive");
2233 if (parseEscapedString(Data))
2236 getStreamer().EmitBytes(Data);
2238 getStreamer().EmitBytes(StringRef("\0", 1));
2242 if (getLexer().is(AsmToken::EndOfStatement))
2245 if (getLexer().isNot(AsmToken::Comma))
2246 return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
2255 /// parseDirectiveValue
2256 /// ::= (.byte | .short | ... ) [ expression (, expression)* ]
2257 bool AsmParser::parseDirectiveValue(unsigned Size) {
2258 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2259 checkForValidSection();
2262 const MCExpr *Value;
2263 SMLoc ExprLoc = getLexer().getLoc();
2264 if (parseExpression(Value))
2267 // Special case constant expressions to match code generator.
2268 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
2269 assert(Size <= 8 && "Invalid size");
2270 uint64_t IntValue = MCE->getValue();
2271 if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
2272 return Error(ExprLoc, "literal value out of range for directive");
2273 getStreamer().EmitIntValue(IntValue, Size);
2275 getStreamer().EmitValue(Value, Size);
2277 if (getLexer().is(AsmToken::EndOfStatement))
2280 // FIXME: Improve diagnostic.
2281 if (getLexer().isNot(AsmToken::Comma))
2282 return TokError("unexpected token in directive");
2291 /// parseDirectiveRealValue
2292 /// ::= (.single | .double) [ expression (, expression)* ]
2293 bool AsmParser::parseDirectiveRealValue(const fltSemantics &Semantics) {
2294 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2295 checkForValidSection();
2298 // We don't truly support arithmetic on floating point expressions, so we
2299 // have to manually parse unary prefixes.
2301 if (getLexer().is(AsmToken::Minus)) {
2304 } else if (getLexer().is(AsmToken::Plus))
2307 if (getLexer().isNot(AsmToken::Integer) &&
2308 getLexer().isNot(AsmToken::Real) &&
2309 getLexer().isNot(AsmToken::Identifier))
2310 return TokError("unexpected token in directive");
2312 // Convert to an APFloat.
2313 APFloat Value(Semantics);
2314 StringRef IDVal = getTok().getString();
2315 if (getLexer().is(AsmToken::Identifier)) {
2316 if (!IDVal.compare_lower("infinity") || !IDVal.compare_lower("inf"))
2317 Value = APFloat::getInf(Semantics);
2318 else if (!IDVal.compare_lower("nan"))
2319 Value = APFloat::getNaN(Semantics, false, ~0);
2321 return TokError("invalid floating point literal");
2322 } else if (Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven) ==
2323 APFloat::opInvalidOp)
2324 return TokError("invalid floating point literal");
2328 // Consume the numeric token.
2331 // Emit the value as an integer.
2332 APInt AsInt = Value.bitcastToAPInt();
2333 getStreamer().EmitIntValue(AsInt.getLimitedValue(),
2334 AsInt.getBitWidth() / 8);
2336 if (getLexer().is(AsmToken::EndOfStatement))
2339 if (getLexer().isNot(AsmToken::Comma))
2340 return TokError("unexpected token in directive");
2349 /// parseDirectiveZero
2350 /// ::= .zero expression
2351 bool AsmParser::parseDirectiveZero() {
2352 checkForValidSection();
2355 if (parseAbsoluteExpression(NumBytes))
2359 if (getLexer().is(AsmToken::Comma)) {
2361 if (parseAbsoluteExpression(Val))
2365 if (getLexer().isNot(AsmToken::EndOfStatement))
2366 return TokError("unexpected token in '.zero' directive");
2370 getStreamer().EmitFill(NumBytes, Val);
2375 /// parseDirectiveFill
2376 /// ::= .fill expression [ , expression [ , expression ] ]
2377 bool AsmParser::parseDirectiveFill() {
2378 checkForValidSection();
2381 if (parseAbsoluteExpression(NumValues))
2384 int64_t FillSize = 1;
2385 int64_t FillExpr = 0;
2387 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2388 if (getLexer().isNot(AsmToken::Comma))
2389 return TokError("unexpected token in '.fill' directive");
2392 if (parseAbsoluteExpression(FillSize))
2395 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2396 if (getLexer().isNot(AsmToken::Comma))
2397 return TokError("unexpected token in '.fill' directive");
2400 if (parseAbsoluteExpression(FillExpr))
2403 if (getLexer().isNot(AsmToken::EndOfStatement))
2404 return TokError("unexpected token in '.fill' directive");
2410 if (FillSize != 1 && FillSize != 2 && FillSize != 4 && FillSize != 8)
2411 return TokError("invalid '.fill' size, expected 1, 2, 4, or 8");
2413 for (uint64_t i = 0, e = NumValues; i != e; ++i)
2414 getStreamer().EmitIntValue(FillExpr, FillSize);
2419 /// parseDirectiveOrg
2420 /// ::= .org expression [ , expression ]
2421 bool AsmParser::parseDirectiveOrg() {
2422 checkForValidSection();
2424 const MCExpr *Offset;
2425 SMLoc Loc = getTok().getLoc();
2426 if (parseExpression(Offset))
2429 // Parse optional fill expression.
2430 int64_t FillExpr = 0;
2431 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2432 if (getLexer().isNot(AsmToken::Comma))
2433 return TokError("unexpected token in '.org' directive");
2436 if (parseAbsoluteExpression(FillExpr))
2439 if (getLexer().isNot(AsmToken::EndOfStatement))
2440 return TokError("unexpected token in '.org' directive");
2445 // Only limited forms of relocatable expressions are accepted here, it
2446 // has to be relative to the current section. The streamer will return
2447 // 'true' if the expression wasn't evaluatable.
2448 if (getStreamer().EmitValueToOffset(Offset, FillExpr))
2449 return Error(Loc, "expected assembly-time absolute expression");
2454 /// parseDirectiveAlign
2455 /// ::= {.align, ...} expression [ , expression [ , expression ]]
2456 bool AsmParser::parseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
2457 checkForValidSection();
2459 SMLoc AlignmentLoc = getLexer().getLoc();
2461 if (parseAbsoluteExpression(Alignment))
2465 bool HasFillExpr = false;
2466 int64_t FillExpr = 0;
2467 int64_t MaxBytesToFill = 0;
2468 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2469 if (getLexer().isNot(AsmToken::Comma))
2470 return TokError("unexpected token in directive");
2473 // The fill expression can be omitted while specifying a maximum number of
2474 // alignment bytes, e.g:
2476 if (getLexer().isNot(AsmToken::Comma)) {
2478 if (parseAbsoluteExpression(FillExpr))
2482 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2483 if (getLexer().isNot(AsmToken::Comma))
2484 return TokError("unexpected token in directive");
2487 MaxBytesLoc = getLexer().getLoc();
2488 if (parseAbsoluteExpression(MaxBytesToFill))
2491 if (getLexer().isNot(AsmToken::EndOfStatement))
2492 return TokError("unexpected token in directive");
2501 // Compute alignment in bytes.
2503 // FIXME: Diagnose overflow.
2504 if (Alignment >= 32) {
2505 Error(AlignmentLoc, "invalid alignment value");
2509 Alignment = 1ULL << Alignment;
2511 // Reject alignments that aren't a power of two, for gas compatibility.
2512 if (!isPowerOf2_64(Alignment))
2513 Error(AlignmentLoc, "alignment must be a power of 2");
2516 // Diagnose non-sensical max bytes to align.
2517 if (MaxBytesLoc.isValid()) {
2518 if (MaxBytesToFill < 1) {
2519 Error(MaxBytesLoc, "alignment directive can never be satisfied in this "
2520 "many bytes, ignoring maximum bytes expression");
2524 if (MaxBytesToFill >= Alignment) {
2525 Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and "
2531 // Check whether we should use optimal code alignment for this .align
2533 bool UseCodeAlign = getStreamer().getCurrentSection().first->UseCodeAlign();
2534 if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) &&
2535 ValueSize == 1 && UseCodeAlign) {
2536 getStreamer().EmitCodeAlignment(Alignment, MaxBytesToFill);
2538 // FIXME: Target specific behavior about how the "extra" bytes are filled.
2539 getStreamer().EmitValueToAlignment(Alignment, FillExpr, ValueSize,
2546 /// parseDirectiveFile
2547 /// ::= .file [number] filename
2548 /// ::= .file number directory filename
2549 bool AsmParser::parseDirectiveFile(SMLoc DirectiveLoc) {
2550 // FIXME: I'm not sure what this is.
2551 int64_t FileNumber = -1;
2552 SMLoc FileNumberLoc = getLexer().getLoc();
2553 if (getLexer().is(AsmToken::Integer)) {
2554 FileNumber = getTok().getIntVal();
2558 return TokError("file number less than one");
2561 if (getLexer().isNot(AsmToken::String))
2562 return TokError("unexpected token in '.file' directive");
2564 // Usually the directory and filename together, otherwise just the directory.
2565 // Allow the strings to have escaped octal character sequence.
2566 std::string Path = getTok().getString();
2567 if (parseEscapedString(Path))
2571 StringRef Directory;
2573 std::string FilenameData;
2574 if (getLexer().is(AsmToken::String)) {
2575 if (FileNumber == -1)
2576 return TokError("explicit path specified, but no file number");
2577 if (parseEscapedString(FilenameData))
2579 Filename = FilenameData;
2586 if (getLexer().isNot(AsmToken::EndOfStatement))
2587 return TokError("unexpected token in '.file' directive");
2589 if (FileNumber == -1)
2590 getStreamer().EmitFileDirective(Filename);
2592 if (getContext().getGenDwarfForAssembly() == true)
2594 "input can't have .file dwarf directives when -g is "
2595 "used to generate dwarf debug info for assembly code");
2597 if (getStreamer().EmitDwarfFileDirective(FileNumber, Directory, Filename))
2598 Error(FileNumberLoc, "file number already allocated");
2604 /// parseDirectiveLine
2605 /// ::= .line [number]
2606 bool AsmParser::parseDirectiveLine() {
2607 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2608 if (getLexer().isNot(AsmToken::Integer))
2609 return TokError("unexpected token in '.line' directive");
2611 int64_t LineNumber = getTok().getIntVal();
2615 // FIXME: Do something with the .line.
2618 if (getLexer().isNot(AsmToken::EndOfStatement))
2619 return TokError("unexpected token in '.line' directive");
2624 /// parseDirectiveLoc
2625 /// ::= .loc FileNumber [LineNumber] [ColumnPos] [basic_block] [prologue_end]
2626 /// [epilogue_begin] [is_stmt VALUE] [isa VALUE]
2627 /// The first number is a file number, must have been previously assigned with
2628 /// a .file directive, the second number is the line number and optionally the
2629 /// third number is a column position (zero if not specified). The remaining
2630 /// optional items are .loc sub-directives.
2631 bool AsmParser::parseDirectiveLoc() {
2632 if (getLexer().isNot(AsmToken::Integer))
2633 return TokError("unexpected token in '.loc' directive");
2634 int64_t FileNumber = getTok().getIntVal();
2636 return TokError("file number less than one in '.loc' directive");
2637 if (!getContext().isValidDwarfFileNumber(FileNumber))
2638 return TokError("unassigned file number in '.loc' directive");
2641 int64_t LineNumber = 0;
2642 if (getLexer().is(AsmToken::Integer)) {
2643 LineNumber = getTok().getIntVal();
2645 return TokError("line number less than zero in '.loc' directive");
2649 int64_t ColumnPos = 0;
2650 if (getLexer().is(AsmToken::Integer)) {
2651 ColumnPos = getTok().getIntVal();
2653 return TokError("column position less than zero in '.loc' directive");
2657 unsigned Flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0;
2659 int64_t Discriminator = 0;
2660 if (getLexer().isNot(AsmToken::EndOfStatement)) {
2662 if (getLexer().is(AsmToken::EndOfStatement))
2666 SMLoc Loc = getTok().getLoc();
2667 if (parseIdentifier(Name))
2668 return TokError("unexpected token in '.loc' directive");
2670 if (Name == "basic_block")
2671 Flags |= DWARF2_FLAG_BASIC_BLOCK;
2672 else if (Name == "prologue_end")
2673 Flags |= DWARF2_FLAG_PROLOGUE_END;
2674 else if (Name == "epilogue_begin")
2675 Flags |= DWARF2_FLAG_EPILOGUE_BEGIN;
2676 else if (Name == "is_stmt") {
2677 Loc = getTok().getLoc();
2678 const MCExpr *Value;
2679 if (parseExpression(Value))
2681 // The expression must be the constant 0 or 1.
2682 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
2683 int Value = MCE->getValue();
2685 Flags &= ~DWARF2_FLAG_IS_STMT;
2686 else if (Value == 1)
2687 Flags |= DWARF2_FLAG_IS_STMT;
2689 return Error(Loc, "is_stmt value not 0 or 1");
2691 return Error(Loc, "is_stmt value not the constant value of 0 or 1");
2693 } else if (Name == "isa") {
2694 Loc = getTok().getLoc();
2695 const MCExpr *Value;
2696 if (parseExpression(Value))
2698 // The expression must be a constant greater or equal to 0.
2699 if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
2700 int Value = MCE->getValue();
2702 return Error(Loc, "isa number less than zero");
2705 return Error(Loc, "isa number not a constant value");
2707 } else if (Name == "discriminator") {
2708 if (parseAbsoluteExpression(Discriminator))
2711 return Error(Loc, "unknown sub-directive in '.loc' directive");
2714 if (getLexer().is(AsmToken::EndOfStatement))
2719 getStreamer().EmitDwarfLocDirective(FileNumber, LineNumber, ColumnPos, Flags,
2720 Isa, Discriminator, StringRef());
2725 /// parseDirectiveStabs
2726 /// ::= .stabs string, number, number, number
2727 bool AsmParser::parseDirectiveStabs() {
2728 return TokError("unsupported directive '.stabs'");
2731 /// parseDirectiveCFISections
2732 /// ::= .cfi_sections section [, section]
2733 bool AsmParser::parseDirectiveCFISections() {
2738 if (parseIdentifier(Name))
2739 return TokError("Expected an identifier");
2741 if (Name == ".eh_frame")
2743 else if (Name == ".debug_frame")
2746 if (getLexer().is(AsmToken::Comma)) {
2749 if (parseIdentifier(Name))
2750 return TokError("Expected an identifier");
2752 if (Name == ".eh_frame")
2754 else if (Name == ".debug_frame")
2758 getStreamer().EmitCFISections(EH, Debug);
2762 /// parseDirectiveCFIStartProc
2763 /// ::= .cfi_startproc
2764 bool AsmParser::parseDirectiveCFIStartProc() {
2765 getStreamer().EmitCFIStartProc();
2769 /// parseDirectiveCFIEndProc
2770 /// ::= .cfi_endproc
2771 bool AsmParser::parseDirectiveCFIEndProc() {
2772 getStreamer().EmitCFIEndProc();
2776 /// \brief parse register name or number.
2777 bool AsmParser::parseRegisterOrRegisterNumber(int64_t &Register,
2778 SMLoc DirectiveLoc) {
2781 if (getLexer().isNot(AsmToken::Integer)) {
2782 if (getTargetParser().ParseRegister(RegNo, DirectiveLoc, DirectiveLoc))
2784 Register = getContext().getRegisterInfo()->getDwarfRegNum(RegNo, true);
2786 return parseAbsoluteExpression(Register);
2791 /// parseDirectiveCFIDefCfa
2792 /// ::= .cfi_def_cfa register, offset
2793 bool AsmParser::parseDirectiveCFIDefCfa(SMLoc DirectiveLoc) {
2794 int64_t Register = 0;
2795 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
2798 if (getLexer().isNot(AsmToken::Comma))
2799 return TokError("unexpected token in directive");
2803 if (parseAbsoluteExpression(Offset))
2806 getStreamer().EmitCFIDefCfa(Register, Offset);
2810 /// parseDirectiveCFIDefCfaOffset
2811 /// ::= .cfi_def_cfa_offset offset
2812 bool AsmParser::parseDirectiveCFIDefCfaOffset() {
2814 if (parseAbsoluteExpression(Offset))
2817 getStreamer().EmitCFIDefCfaOffset(Offset);
2821 /// parseDirectiveCFIRegister
2822 /// ::= .cfi_register register, register
2823 bool AsmParser::parseDirectiveCFIRegister(SMLoc DirectiveLoc) {
2824 int64_t Register1 = 0;
2825 if (parseRegisterOrRegisterNumber(Register1, DirectiveLoc))
2828 if (getLexer().isNot(AsmToken::Comma))
2829 return TokError("unexpected token in directive");
2832 int64_t Register2 = 0;
2833 if (parseRegisterOrRegisterNumber(Register2, DirectiveLoc))
2836 getStreamer().EmitCFIRegister(Register1, Register2);
2840 /// parseDirectiveCFIWindowSave
2841 /// ::= .cfi_window_save
2842 bool AsmParser::parseDirectiveCFIWindowSave() {
2843 getStreamer().EmitCFIWindowSave();
2847 /// parseDirectiveCFIAdjustCfaOffset
2848 /// ::= .cfi_adjust_cfa_offset adjustment
2849 bool AsmParser::parseDirectiveCFIAdjustCfaOffset() {
2850 int64_t Adjustment = 0;
2851 if (parseAbsoluteExpression(Adjustment))
2854 getStreamer().EmitCFIAdjustCfaOffset(Adjustment);
2858 /// parseDirectiveCFIDefCfaRegister
2859 /// ::= .cfi_def_cfa_register register
2860 bool AsmParser::parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc) {
2861 int64_t Register = 0;
2862 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
2865 getStreamer().EmitCFIDefCfaRegister(Register);
2869 /// parseDirectiveCFIOffset
2870 /// ::= .cfi_offset register, offset
2871 bool AsmParser::parseDirectiveCFIOffset(SMLoc DirectiveLoc) {
2872 int64_t Register = 0;
2875 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
2878 if (getLexer().isNot(AsmToken::Comma))
2879 return TokError("unexpected token in directive");
2882 if (parseAbsoluteExpression(Offset))
2885 getStreamer().EmitCFIOffset(Register, Offset);
2889 /// parseDirectiveCFIRelOffset
2890 /// ::= .cfi_rel_offset register, offset
2891 bool AsmParser::parseDirectiveCFIRelOffset(SMLoc DirectiveLoc) {
2892 int64_t Register = 0;
2894 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
2897 if (getLexer().isNot(AsmToken::Comma))
2898 return TokError("unexpected token in directive");
2902 if (parseAbsoluteExpression(Offset))
2905 getStreamer().EmitCFIRelOffset(Register, Offset);
2909 static bool isValidEncoding(int64_t Encoding) {
2910 if (Encoding & ~0xff)
2913 if (Encoding == dwarf::DW_EH_PE_omit)
2916 const unsigned Format = Encoding & 0xf;
2917 if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 &&
2918 Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 &&
2919 Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 &&
2920 Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed)
2923 const unsigned Application = Encoding & 0x70;
2924 if (Application != dwarf::DW_EH_PE_absptr &&
2925 Application != dwarf::DW_EH_PE_pcrel)
2931 /// parseDirectiveCFIPersonalityOrLsda
2932 /// IsPersonality true for cfi_personality, false for cfi_lsda
2933 /// ::= .cfi_personality encoding, [symbol_name]
2934 /// ::= .cfi_lsda encoding, [symbol_name]
2935 bool AsmParser::parseDirectiveCFIPersonalityOrLsda(bool IsPersonality) {
2936 int64_t Encoding = 0;
2937 if (parseAbsoluteExpression(Encoding))
2939 if (Encoding == dwarf::DW_EH_PE_omit)
2942 if (!isValidEncoding(Encoding))
2943 return TokError("unsupported encoding.");
2945 if (getLexer().isNot(AsmToken::Comma))
2946 return TokError("unexpected token in directive");
2950 if (parseIdentifier(Name))
2951 return TokError("expected identifier in directive");
2953 MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
2956 getStreamer().EmitCFIPersonality(Sym, Encoding);
2958 getStreamer().EmitCFILsda(Sym, Encoding);
2962 /// parseDirectiveCFIRememberState
2963 /// ::= .cfi_remember_state
2964 bool AsmParser::parseDirectiveCFIRememberState() {
2965 getStreamer().EmitCFIRememberState();
2969 /// parseDirectiveCFIRestoreState
2970 /// ::= .cfi_remember_state
2971 bool AsmParser::parseDirectiveCFIRestoreState() {
2972 getStreamer().EmitCFIRestoreState();
2976 /// parseDirectiveCFISameValue
2977 /// ::= .cfi_same_value register
2978 bool AsmParser::parseDirectiveCFISameValue(SMLoc DirectiveLoc) {
2979 int64_t Register = 0;
2981 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
2984 getStreamer().EmitCFISameValue(Register);
2988 /// parseDirectiveCFIRestore
2989 /// ::= .cfi_restore register
2990 bool AsmParser::parseDirectiveCFIRestore(SMLoc DirectiveLoc) {
2991 int64_t Register = 0;
2992 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
2995 getStreamer().EmitCFIRestore(Register);
2999 /// parseDirectiveCFIEscape
3000 /// ::= .cfi_escape expression[,...]
3001 bool AsmParser::parseDirectiveCFIEscape() {
3004 if (parseAbsoluteExpression(CurrValue))
3007 Values.push_back((uint8_t)CurrValue);
3009 while (getLexer().is(AsmToken::Comma)) {
3012 if (parseAbsoluteExpression(CurrValue))
3015 Values.push_back((uint8_t)CurrValue);
3018 getStreamer().EmitCFIEscape(Values);
3022 /// parseDirectiveCFISignalFrame
3023 /// ::= .cfi_signal_frame
3024 bool AsmParser::parseDirectiveCFISignalFrame() {
3025 if (getLexer().isNot(AsmToken::EndOfStatement))
3026 return Error(getLexer().getLoc(),
3027 "unexpected token in '.cfi_signal_frame'");
3029 getStreamer().EmitCFISignalFrame();
3033 /// parseDirectiveCFIUndefined
3034 /// ::= .cfi_undefined register
3035 bool AsmParser::parseDirectiveCFIUndefined(SMLoc DirectiveLoc) {
3036 int64_t Register = 0;
3038 if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
3041 getStreamer().EmitCFIUndefined(Register);
3045 /// parseDirectiveMacrosOnOff
3048 bool AsmParser::parseDirectiveMacrosOnOff(StringRef Directive) {
3049 if (getLexer().isNot(AsmToken::EndOfStatement))
3050 return Error(getLexer().getLoc(),
3051 "unexpected token in '" + Directive + "' directive");
3053 setMacrosEnabled(Directive == ".macros_on");
3057 /// parseDirectiveMacro
3058 /// ::= .macro name [parameters]
3059 bool AsmParser::parseDirectiveMacro(SMLoc DirectiveLoc) {
3061 if (parseIdentifier(Name))
3062 return TokError("expected identifier in '.macro' directive");
3064 MCAsmMacroParameters Parameters;
3065 // Argument delimiter is initially unknown. It will be set by
3066 // parseMacroArgument()
3067 AsmToken::TokenKind ArgumentDelimiter = AsmToken::Eof;
3068 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3070 MCAsmMacroParameter Parameter;
3071 if (parseIdentifier(Parameter.first))
3072 return TokError("expected identifier in '.macro' directive");
3074 if (getLexer().is(AsmToken::Equal)) {
3076 if (parseMacroArgument(Parameter.second, ArgumentDelimiter))
3080 Parameters.push_back(Parameter);
3082 if (getLexer().is(AsmToken::Comma))
3084 else if (getLexer().is(AsmToken::EndOfStatement))
3089 // Eat the end of statement.
3092 AsmToken EndToken, StartToken = getTok();
3094 // Lex the macro definition.
3096 // Check whether we have reached the end of the file.
3097 if (getLexer().is(AsmToken::Eof))
3098 return Error(DirectiveLoc, "no matching '.endmacro' in definition");
3100 // Otherwise, check whether we have reach the .endmacro.
3101 if (getLexer().is(AsmToken::Identifier) &&
3102 (getTok().getIdentifier() == ".endm" ||
3103 getTok().getIdentifier() == ".endmacro")) {
3104 EndToken = getTok();
3106 if (getLexer().isNot(AsmToken::EndOfStatement))
3107 return TokError("unexpected token in '" + EndToken.getIdentifier() +
3112 // Otherwise, scan til the end of the statement.
3113 eatToEndOfStatement();
3116 if (lookupMacro(Name)) {
3117 return Error(DirectiveLoc, "macro '" + Name + "' is already defined");
3120 const char *BodyStart = StartToken.getLoc().getPointer();
3121 const char *BodyEnd = EndToken.getLoc().getPointer();
3122 StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
3123 checkForBadMacro(DirectiveLoc, Name, Body, Parameters);
3124 defineMacro(Name, MCAsmMacro(Name, Body, Parameters));
3128 /// checkForBadMacro
3130 /// With the support added for named parameters there may be code out there that
3131 /// is transitioning from positional parameters. In versions of gas that did
3132 /// not support named parameters they would be ignored on the macro defintion.
3133 /// But to support both styles of parameters this is not possible so if a macro
3134 /// defintion has named parameters but does not use them and has what appears
3135 /// to be positional parameters, strings like $1, $2, ... and $n, then issue a
3136 /// warning that the positional parameter found in body which have no effect.
3137 /// Hoping the developer will either remove the named parameters from the macro
3138 /// definiton so the positional parameters get used if that was what was
3139 /// intended or change the macro to use the named parameters. It is possible
3140 /// this warning will trigger when the none of the named parameters are used
3141 /// and the strings like $1 are infact to simply to be passed trough unchanged.
3142 void AsmParser::checkForBadMacro(SMLoc DirectiveLoc, StringRef Name,
3144 MCAsmMacroParameters Parameters) {
3145 // If this macro is not defined with named parameters the warning we are
3146 // checking for here doesn't apply.
3147 unsigned NParameters = Parameters.size();
3148 if (NParameters == 0)
3151 bool NamedParametersFound = false;
3152 bool PositionalParametersFound = false;
3154 // Look at the body of the macro for use of both the named parameters and what
3155 // are likely to be positional parameters. This is what expandMacro() is
3156 // doing when it finds the parameters in the body.
3157 while (!Body.empty()) {
3158 // Scan for the next possible parameter.
3159 std::size_t End = Body.size(), Pos = 0;
3160 for (; Pos != End; ++Pos) {
3161 // Check for a substitution or escape.
3162 // This macro is defined with parameters, look for \foo, \bar, etc.
3163 if (Body[Pos] == '\\' && Pos + 1 != End)
3166 // This macro should have parameters, but look for $0, $1, ..., $n too.
3167 if (Body[Pos] != '$' || Pos + 1 == End)
3169 char Next = Body[Pos + 1];
3170 if (Next == '$' || Next == 'n' ||
3171 isdigit(static_cast<unsigned char>(Next)))
3175 // Check if we reached the end.
3179 if (Body[Pos] == '$') {
3180 switch (Body[Pos + 1]) {
3185 // $n => number of arguments
3187 PositionalParametersFound = true;
3190 // $[0-9] => argument
3192 PositionalParametersFound = true;
3198 unsigned I = Pos + 1;
3199 while (isIdentifierChar(Body[I]) && I + 1 != End)
3202 const char *Begin = Body.data() + Pos + 1;
3203 StringRef Argument(Begin, I - (Pos + 1));
3205 for (; Index < NParameters; ++Index)
3206 if (Parameters[Index].first == Argument)
3209 if (Index == NParameters) {
3210 if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
3216 NamedParametersFound = true;
3217 Pos += 1 + Argument.size();
3220 // Update the scan point.
3221 Body = Body.substr(Pos);
3224 if (!NamedParametersFound && PositionalParametersFound)
3225 Warning(DirectiveLoc, "macro defined with named parameters which are not "
3226 "used in macro body, possible positional parameter "
3227 "found in body which will have no effect");
3230 /// parseDirectiveEndMacro
3233 bool AsmParser::parseDirectiveEndMacro(StringRef Directive) {
3234 if (getLexer().isNot(AsmToken::EndOfStatement))
3235 return TokError("unexpected token in '" + Directive + "' directive");
3237 // If we are inside a macro instantiation, terminate the current
3239 if (isInsideMacroInstantiation()) {
3244 // Otherwise, this .endmacro is a stray entry in the file; well formed
3245 // .endmacro directives are handled during the macro definition parsing.
3246 return TokError("unexpected '" + Directive + "' in file, "
3247 "no current macro definition");
3250 /// parseDirectivePurgeMacro
3252 bool AsmParser::parseDirectivePurgeMacro(SMLoc DirectiveLoc) {
3254 if (parseIdentifier(Name))
3255 return TokError("expected identifier in '.purgem' directive");
3257 if (getLexer().isNot(AsmToken::EndOfStatement))
3258 return TokError("unexpected token in '.purgem' directive");
3260 if (!lookupMacro(Name))
3261 return Error(DirectiveLoc, "macro '" + Name + "' is not defined");
3263 undefineMacro(Name);
3267 /// parseDirectiveBundleAlignMode
3268 /// ::= {.bundle_align_mode} expression
3269 bool AsmParser::parseDirectiveBundleAlignMode() {
3270 checkForValidSection();
3272 // Expect a single argument: an expression that evaluates to a constant
3273 // in the inclusive range 0-30.
3274 SMLoc ExprLoc = getLexer().getLoc();
3275 int64_t AlignSizePow2;
3276 if (parseAbsoluteExpression(AlignSizePow2))
3278 else if (getLexer().isNot(AsmToken::EndOfStatement))
3279 return TokError("unexpected token after expression in"
3280 " '.bundle_align_mode' directive");
3281 else if (AlignSizePow2 < 0 || AlignSizePow2 > 30)
3282 return Error(ExprLoc,
3283 "invalid bundle alignment size (expected between 0 and 30)");
3287 // Because of AlignSizePow2's verified range we can safely truncate it to
3289 getStreamer().EmitBundleAlignMode(static_cast<unsigned>(AlignSizePow2));
3293 /// parseDirectiveBundleLock
3294 /// ::= {.bundle_lock} [align_to_end]
3295 bool AsmParser::parseDirectiveBundleLock() {
3296 checkForValidSection();
3297 bool AlignToEnd = false;
3299 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3301 SMLoc Loc = getTok().getLoc();
3302 const char *kInvalidOptionError =
3303 "invalid option for '.bundle_lock' directive";
3305 if (parseIdentifier(Option))
3306 return Error(Loc, kInvalidOptionError);
3308 if (Option != "align_to_end")
3309 return Error(Loc, kInvalidOptionError);
3310 else if (getLexer().isNot(AsmToken::EndOfStatement))
3312 "unexpected token after '.bundle_lock' directive option");
3318 getStreamer().EmitBundleLock(AlignToEnd);
3322 /// parseDirectiveBundleLock
3323 /// ::= {.bundle_lock}
3324 bool AsmParser::parseDirectiveBundleUnlock() {
3325 checkForValidSection();
3327 if (getLexer().isNot(AsmToken::EndOfStatement))
3328 return TokError("unexpected token in '.bundle_unlock' directive");
3331 getStreamer().EmitBundleUnlock();
3335 /// parseDirectiveSpace
3336 /// ::= (.skip | .space) expression [ , expression ]
3337 bool AsmParser::parseDirectiveSpace(StringRef IDVal) {
3338 checkForValidSection();
3341 if (parseAbsoluteExpression(NumBytes))
3344 int64_t FillExpr = 0;
3345 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3346 if (getLexer().isNot(AsmToken::Comma))
3347 return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
3350 if (parseAbsoluteExpression(FillExpr))
3353 if (getLexer().isNot(AsmToken::EndOfStatement))
3354 return TokError("unexpected token in '" + Twine(IDVal) + "' directive");
3360 return TokError("invalid number of bytes in '" + Twine(IDVal) +
3363 // FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0.
3364 getStreamer().EmitFill(NumBytes, FillExpr);
3369 /// parseDirectiveLEB128
3370 /// ::= (.sleb128 | .uleb128) expression
3371 bool AsmParser::parseDirectiveLEB128(bool Signed) {
3372 checkForValidSection();
3373 const MCExpr *Value;
3375 if (parseExpression(Value))
3378 if (getLexer().isNot(AsmToken::EndOfStatement))
3379 return TokError("unexpected token in directive");
3382 getStreamer().EmitSLEB128Value(Value);
3384 getStreamer().EmitULEB128Value(Value);
3389 /// parseDirectiveSymbolAttribute
3390 /// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ]
3391 bool AsmParser::parseDirectiveSymbolAttribute(MCSymbolAttr Attr) {
3392 if (getLexer().isNot(AsmToken::EndOfStatement)) {
3395 SMLoc Loc = getTok().getLoc();
3397 if (parseIdentifier(Name))
3398 return Error(Loc, "expected identifier in directive");
3400 MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
3402 // Assembler local symbols don't make any sense here. Complain loudly.
3403 if (Sym->isTemporary())
3404 return Error(Loc, "non-local symbol required in directive");
3406 if (!getStreamer().EmitSymbolAttribute(Sym, Attr))
3407 return Error(Loc, "unable to emit symbol attribute");
3409 if (getLexer().is(AsmToken::EndOfStatement))
3412 if (getLexer().isNot(AsmToken::Comma))
3413 return TokError("unexpected token in directive");
3422 /// parseDirectiveComm
3423 /// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ]
3424 bool AsmParser::parseDirectiveComm(bool IsLocal) {
3425 checkForValidSection();
3427 SMLoc IDLoc = getLexer().getLoc();
3429 if (parseIdentifier(Name))
3430 return TokError("expected identifier in directive");
3432 // Handle the identifier as the key symbol.
3433 MCSymbol *Sym = getContext().GetOrCreateSymbol(Name);
3435 if (getLexer().isNot(AsmToken::Comma))
3436 return TokError("unexpected token in directive");
3440 SMLoc SizeLoc = getLexer().getLoc();
3441 if (parseAbsoluteExpression(Size))
3444 int64_t Pow2Alignment = 0;
3445 SMLoc Pow2AlignmentLoc;
3446 if (getLexer().is(AsmToken::Comma)) {
3448 Pow2AlignmentLoc = getLexer().getLoc();
3449 if (parseAbsoluteExpression(Pow2Alignment))
3452 LCOMM::LCOMMType LCOMM = Lexer.getMAI().getLCOMMDirectiveAlignmentType();
3453 if (IsLocal && LCOMM == LCOMM::NoAlignment)
3454 return Error(Pow2AlignmentLoc, "alignment not supported on this target");
3456 // If this target takes alignments in bytes (not log) validate and convert.
3457 if ((!IsLocal && Lexer.getMAI().getCOMMDirectiveAlignmentIsInBytes()) ||
3458 (IsLocal && LCOMM == LCOMM::ByteAlignment)) {
3459 if (!isPowerOf2_64(Pow2Alignment))
3460 return Error(Pow2AlignmentLoc, "alignment must be a power of 2");
3461 Pow2Alignment = Log2_64(Pow2Alignment);
3465 if (getLexer().isNot(AsmToken::EndOfStatement))
3466 return TokError("unexpected token in '.comm' or '.lcomm' directive");
3470 // NOTE: a size of zero for a .comm should create a undefined symbol
3471 // but a size of .lcomm creates a bss symbol of size zero.
3473 return Error(SizeLoc, "invalid '.comm' or '.lcomm' directive size, can't "
3474 "be less than zero");
3476 // NOTE: The alignment in the directive is a power of 2 value, the assembler
3477 // may internally end up wanting an alignment in bytes.
3478 // FIXME: Diagnose overflow.
3479 if (Pow2Alignment < 0)
3480 return Error(Pow2AlignmentLoc, "invalid '.comm' or '.lcomm' directive "
3481 "alignment, can't be less than zero");
3483 if (!Sym->isUndefined())
3484 return Error(IDLoc, "invalid symbol redefinition");
3486 // Create the Symbol as a common or local common with Size and Pow2Alignment
3488 getStreamer().EmitLocalCommonSymbol(Sym, Size, 1 << Pow2Alignment);
3492 getStreamer().EmitCommonSymbol(Sym, Size, 1 << Pow2Alignment);
3496 /// parseDirectiveAbort
3497 /// ::= .abort [... message ...]
3498 bool AsmParser::parseDirectiveAbort() {
3499 // FIXME: Use loc from directive.
3500 SMLoc Loc = getLexer().getLoc();
3502 StringRef Str = parseStringToEndOfStatement();
3503 if (getLexer().isNot(AsmToken::EndOfStatement))
3504 return TokError("unexpected token in '.abort' directive");
3509 Error(Loc, ".abort detected. Assembly stopping.");
3511 Error(Loc, ".abort '" + Str + "' detected. Assembly stopping.");
3512 // FIXME: Actually abort assembly here.
3517 /// parseDirectiveInclude
3518 /// ::= .include "filename"
3519 bool AsmParser::parseDirectiveInclude() {
3520 if (getLexer().isNot(AsmToken::String))
3521 return TokError("expected string in '.include' directive");
3523 // Allow the strings to have escaped octal character sequence.
3524 std::string Filename;
3525 if (parseEscapedString(Filename))
3527 SMLoc IncludeLoc = getLexer().getLoc();
3530 if (getLexer().isNot(AsmToken::EndOfStatement))
3531 return TokError("unexpected token in '.include' directive");
3533 // Attempt to switch the lexer to the included file before consuming the end
3534 // of statement to avoid losing it when we switch.
3535 if (enterIncludeFile(Filename)) {
3536 Error(IncludeLoc, "Could not find include file '" + Filename + "'");
3543 /// parseDirectiveIncbin
3544 /// ::= .incbin "filename"
3545 bool AsmParser::parseDirectiveIncbin() {
3546 if (getLexer().isNot(AsmToken::String))
3547 return TokError("expected string in '.incbin' directive");
3549 // Allow the strings to have escaped octal character sequence.
3550 std::string Filename;
3551 if (parseEscapedString(Filename))
3553 SMLoc IncbinLoc = getLexer().getLoc();
3556 if (getLexer().isNot(AsmToken::EndOfStatement))
3557 return TokError("unexpected token in '.incbin' directive");
3559 // Attempt to process the included file.
3560 if (processIncbinFile(Filename)) {
3561 Error(IncbinLoc, "Could not find incbin file '" + Filename + "'");
3568 /// parseDirectiveIf
3569 /// ::= .if expression
3570 bool AsmParser::parseDirectiveIf(SMLoc DirectiveLoc) {
3571 TheCondStack.push_back(TheCondState);
3572 TheCondState.TheCond = AsmCond::IfCond;
3573 if (TheCondState.Ignore) {
3574 eatToEndOfStatement();
3577 if (parseAbsoluteExpression(ExprValue))
3580 if (getLexer().isNot(AsmToken::EndOfStatement))
3581 return TokError("unexpected token in '.if' directive");
3585 TheCondState.CondMet = ExprValue;
3586 TheCondState.Ignore = !TheCondState.CondMet;
3592 /// parseDirectiveIfb
3594 bool AsmParser::parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) {
3595 TheCondStack.push_back(TheCondState);
3596 TheCondState.TheCond = AsmCond::IfCond;
3598 if (TheCondState.Ignore) {
3599 eatToEndOfStatement();
3601 StringRef Str = parseStringToEndOfStatement();
3603 if (getLexer().isNot(AsmToken::EndOfStatement))
3604 return TokError("unexpected token in '.ifb' directive");
3608 TheCondState.CondMet = ExpectBlank == Str.empty();
3609 TheCondState.Ignore = !TheCondState.CondMet;
3615 /// parseDirectiveIfc
3616 /// ::= .ifc string1, string2
3617 bool AsmParser::parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) {
3618 TheCondStack.push_back(TheCondState);
3619 TheCondState.TheCond = AsmCond::IfCond;
3621 if (TheCondState.Ignore) {
3622 eatToEndOfStatement();
3624 StringRef Str1 = parseStringToComma();
3626 if (getLexer().isNot(AsmToken::Comma))
3627 return TokError("unexpected token in '.ifc' directive");
3631 StringRef Str2 = parseStringToEndOfStatement();
3633 if (getLexer().isNot(AsmToken::EndOfStatement))
3634 return TokError("unexpected token in '.ifc' directive");
3638 TheCondState.CondMet = ExpectEqual == (Str1 == Str2);
3639 TheCondState.Ignore = !TheCondState.CondMet;
3645 /// parseDirectiveIfdef
3646 /// ::= .ifdef symbol
3647 bool AsmParser::parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) {
3649 TheCondStack.push_back(TheCondState);
3650 TheCondState.TheCond = AsmCond::IfCond;
3652 if (TheCondState.Ignore) {
3653 eatToEndOfStatement();
3655 if (parseIdentifier(Name))
3656 return TokError("expected identifier after '.ifdef'");
3660 MCSymbol *Sym = getContext().LookupSymbol(Name);
3663 TheCondState.CondMet = (Sym != NULL && !Sym->isUndefined());
3665 TheCondState.CondMet = (Sym == NULL || Sym->isUndefined());
3666 TheCondState.Ignore = !TheCondState.CondMet;
3672 /// parseDirectiveElseIf
3673 /// ::= .elseif expression
3674 bool AsmParser::parseDirectiveElseIf(SMLoc DirectiveLoc) {
3675 if (TheCondState.TheCond != AsmCond::IfCond &&
3676 TheCondState.TheCond != AsmCond::ElseIfCond)
3677 Error(DirectiveLoc, "Encountered a .elseif that doesn't follow a .if or "
3679 TheCondState.TheCond = AsmCond::ElseIfCond;
3681 bool LastIgnoreState = false;
3682 if (!TheCondStack.empty())
3683 LastIgnoreState = TheCondStack.back().Ignore;
3684 if (LastIgnoreState || TheCondState.CondMet) {
3685 TheCondState.Ignore = true;
3686 eatToEndOfStatement();
3689 if (parseAbsoluteExpression(ExprValue))
3692 if (getLexer().isNot(AsmToken::EndOfStatement))
3693 return TokError("unexpected token in '.elseif' directive");
3696 TheCondState.CondMet = ExprValue;
3697 TheCondState.Ignore = !TheCondState.CondMet;
3703 /// parseDirectiveElse
3705 bool AsmParser::parseDirectiveElse(SMLoc DirectiveLoc) {
3706 if (getLexer().isNot(AsmToken::EndOfStatement))
3707 return TokError("unexpected token in '.else' directive");
3711 if (TheCondState.TheCond != AsmCond::IfCond &&
3712 TheCondState.TheCond != AsmCond::ElseIfCond)
3713 Error(DirectiveLoc, "Encountered a .else that doesn't follow a .if or an "
3715 TheCondState.TheCond = AsmCond::ElseCond;
3716 bool LastIgnoreState = false;
3717 if (!TheCondStack.empty())
3718 LastIgnoreState = TheCondStack.back().Ignore;
3719 if (LastIgnoreState || TheCondState.CondMet)
3720 TheCondState.Ignore = true;
3722 TheCondState.Ignore = false;
3727 /// parseDirectiveEndIf
3729 bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) {
3730 if (getLexer().isNot(AsmToken::EndOfStatement))
3731 return TokError("unexpected token in '.endif' directive");
3735 if ((TheCondState.TheCond == AsmCond::NoCond) || TheCondStack.empty())
3736 Error(DirectiveLoc, "Encountered a .endif that doesn't follow a .if or "
3738 if (!TheCondStack.empty()) {
3739 TheCondState = TheCondStack.back();
3740 TheCondStack.pop_back();
3746 void AsmParser::initializeDirectiveKindMap() {
3747 DirectiveKindMap[".set"] = DK_SET;
3748 DirectiveKindMap[".equ"] = DK_EQU;
3749 DirectiveKindMap[".equiv"] = DK_EQUIV;
3750 DirectiveKindMap[".ascii"] = DK_ASCII;
3751 DirectiveKindMap[".asciz"] = DK_ASCIZ;
3752 DirectiveKindMap[".string"] = DK_STRING;
3753 DirectiveKindMap[".byte"] = DK_BYTE;
3754 DirectiveKindMap[".short"] = DK_SHORT;
3755 DirectiveKindMap[".value"] = DK_VALUE;
3756 DirectiveKindMap[".2byte"] = DK_2BYTE;
3757 DirectiveKindMap[".long"] = DK_LONG;
3758 DirectiveKindMap[".int"] = DK_INT;
3759 DirectiveKindMap[".4byte"] = DK_4BYTE;
3760 DirectiveKindMap[".quad"] = DK_QUAD;
3761 DirectiveKindMap[".8byte"] = DK_8BYTE;
3762 DirectiveKindMap[".single"] = DK_SINGLE;
3763 DirectiveKindMap[".float"] = DK_FLOAT;
3764 DirectiveKindMap[".double"] = DK_DOUBLE;
3765 DirectiveKindMap[".align"] = DK_ALIGN;
3766 DirectiveKindMap[".align32"] = DK_ALIGN32;
3767 DirectiveKindMap[".balign"] = DK_BALIGN;
3768 DirectiveKindMap[".balignw"] = DK_BALIGNW;
3769 DirectiveKindMap[".balignl"] = DK_BALIGNL;
3770 DirectiveKindMap[".p2align"] = DK_P2ALIGN;
3771 DirectiveKindMap[".p2alignw"] = DK_P2ALIGNW;
3772 DirectiveKindMap[".p2alignl"] = DK_P2ALIGNL;
3773 DirectiveKindMap[".org"] = DK_ORG;
3774 DirectiveKindMap[".fill"] = DK_FILL;
3775 DirectiveKindMap[".zero"] = DK_ZERO;
3776 DirectiveKindMap[".extern"] = DK_EXTERN;
3777 DirectiveKindMap[".globl"] = DK_GLOBL;
3778 DirectiveKindMap[".global"] = DK_GLOBAL;
3779 DirectiveKindMap[".lazy_reference"] = DK_LAZY_REFERENCE;
3780 DirectiveKindMap[".no_dead_strip"] = DK_NO_DEAD_STRIP;
3781 DirectiveKindMap[".symbol_resolver"] = DK_SYMBOL_RESOLVER;
3782 DirectiveKindMap[".private_extern"] = DK_PRIVATE_EXTERN;
3783 DirectiveKindMap[".reference"] = DK_REFERENCE;
3784 DirectiveKindMap[".weak_definition"] = DK_WEAK_DEFINITION;
3785 DirectiveKindMap[".weak_reference"] = DK_WEAK_REFERENCE;
3786 DirectiveKindMap[".weak_def_can_be_hidden"] = DK_WEAK_DEF_CAN_BE_HIDDEN;
3787 DirectiveKindMap[".comm"] = DK_COMM;
3788 DirectiveKindMap[".common"] = DK_COMMON;
3789 DirectiveKindMap[".lcomm"] = DK_LCOMM;
3790 DirectiveKindMap[".abort"] = DK_ABORT;
3791 DirectiveKindMap[".include"] = DK_INCLUDE;
3792 DirectiveKindMap[".incbin"] = DK_INCBIN;
3793 DirectiveKindMap[".code16"] = DK_CODE16;
3794 DirectiveKindMap[".code16gcc"] = DK_CODE16GCC;
3795 DirectiveKindMap[".rept"] = DK_REPT;
3796 DirectiveKindMap[".irp"] = DK_IRP;
3797 DirectiveKindMap[".irpc"] = DK_IRPC;
3798 DirectiveKindMap[".endr"] = DK_ENDR;
3799 DirectiveKindMap[".bundle_align_mode"] = DK_BUNDLE_ALIGN_MODE;
3800 DirectiveKindMap[".bundle_lock"] = DK_BUNDLE_LOCK;
3801 DirectiveKindMap[".bundle_unlock"] = DK_BUNDLE_UNLOCK;
3802 DirectiveKindMap[".if"] = DK_IF;
3803 DirectiveKindMap[".ifb"] = DK_IFB;
3804 DirectiveKindMap[".ifnb"] = DK_IFNB;
3805 DirectiveKindMap[".ifc"] = DK_IFC;
3806 DirectiveKindMap[".ifnc"] = DK_IFNC;
3807 DirectiveKindMap[".ifdef"] = DK_IFDEF;
3808 DirectiveKindMap[".ifndef"] = DK_IFNDEF;
3809 DirectiveKindMap[".ifnotdef"] = DK_IFNOTDEF;
3810 DirectiveKindMap[".elseif"] = DK_ELSEIF;
3811 DirectiveKindMap[".else"] = DK_ELSE;
3812 DirectiveKindMap[".endif"] = DK_ENDIF;
3813 DirectiveKindMap[".skip"] = DK_SKIP;
3814 DirectiveKindMap[".space"] = DK_SPACE;
3815 DirectiveKindMap[".file"] = DK_FILE;
3816 DirectiveKindMap[".line"] = DK_LINE;
3817 DirectiveKindMap[".loc"] = DK_LOC;
3818 DirectiveKindMap[".stabs"] = DK_STABS;
3819 DirectiveKindMap[".sleb128"] = DK_SLEB128;
3820 DirectiveKindMap[".uleb128"] = DK_ULEB128;
3821 DirectiveKindMap[".cfi_sections"] = DK_CFI_SECTIONS;
3822 DirectiveKindMap[".cfi_startproc"] = DK_CFI_STARTPROC;
3823 DirectiveKindMap[".cfi_endproc"] = DK_CFI_ENDPROC;
3824 DirectiveKindMap[".cfi_def_cfa"] = DK_CFI_DEF_CFA;
3825 DirectiveKindMap[".cfi_def_cfa_offset"] = DK_CFI_DEF_CFA_OFFSET;
3826 DirectiveKindMap[".cfi_adjust_cfa_offset"] = DK_CFI_ADJUST_CFA_OFFSET;
3827 DirectiveKindMap[".cfi_def_cfa_register"] = DK_CFI_DEF_CFA_REGISTER;
3828 DirectiveKindMap[".cfi_offset"] = DK_CFI_OFFSET;
3829 DirectiveKindMap[".cfi_rel_offset"] = DK_CFI_REL_OFFSET;
3830 DirectiveKindMap[".cfi_personality"] = DK_CFI_PERSONALITY;
3831 DirectiveKindMap[".cfi_lsda"] = DK_CFI_LSDA;
3832 DirectiveKindMap[".cfi_remember_state"] = DK_CFI_REMEMBER_STATE;
3833 DirectiveKindMap[".cfi_restore_state"] = DK_CFI_RESTORE_STATE;
3834 DirectiveKindMap[".cfi_same_value"] = DK_CFI_SAME_VALUE;
3835 DirectiveKindMap[".cfi_restore"] = DK_CFI_RESTORE;
3836 DirectiveKindMap[".cfi_escape"] = DK_CFI_ESCAPE;
3837 DirectiveKindMap[".cfi_signal_frame"] = DK_CFI_SIGNAL_FRAME;
3838 DirectiveKindMap[".cfi_undefined"] = DK_CFI_UNDEFINED;
3839 DirectiveKindMap[".cfi_register"] = DK_CFI_REGISTER;
3840 DirectiveKindMap[".cfi_window_save"] = DK_CFI_WINDOW_SAVE;
3841 DirectiveKindMap[".macros_on"] = DK_MACROS_ON;
3842 DirectiveKindMap[".macros_off"] = DK_MACROS_OFF;
3843 DirectiveKindMap[".macro"] = DK_MACRO;
3844 DirectiveKindMap[".endm"] = DK_ENDM;
3845 DirectiveKindMap[".endmacro"] = DK_ENDMACRO;
3846 DirectiveKindMap[".purgem"] = DK_PURGEM;
3849 MCAsmMacro *AsmParser::parseMacroLikeBody(SMLoc DirectiveLoc) {
3850 AsmToken EndToken, StartToken = getTok();
3852 unsigned NestLevel = 0;
3854 // Check whether we have reached the end of the file.
3855 if (getLexer().is(AsmToken::Eof)) {
3856 Error(DirectiveLoc, "no matching '.endr' in definition");
3860 if (Lexer.is(AsmToken::Identifier) &&
3861 (getTok().getIdentifier() == ".rept")) {
3865 // Otherwise, check whether we have reached the .endr.
3866 if (Lexer.is(AsmToken::Identifier) && getTok().getIdentifier() == ".endr") {
3867 if (NestLevel == 0) {
3868 EndToken = getTok();
3870 if (Lexer.isNot(AsmToken::EndOfStatement)) {
3871 TokError("unexpected token in '.endr' directive");
3879 // Otherwise, scan till the end of the statement.
3880 eatToEndOfStatement();
3883 const char *BodyStart = StartToken.getLoc().getPointer();
3884 const char *BodyEnd = EndToken.getLoc().getPointer();
3885 StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
3887 // We Are Anonymous.
3889 MCAsmMacroParameters Parameters;
3890 MacroLikeBodies.push_back(MCAsmMacro(Name, Body, Parameters));
3891 return &MacroLikeBodies.back();
3894 void AsmParser::instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
3895 raw_svector_ostream &OS) {
3898 MemoryBuffer *Instantiation =
3899 MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
3901 // Create the macro instantiation object and add to the current macro
3902 // instantiation stack.
3903 MacroInstantiation *MI = new MacroInstantiation(
3904 M, DirectiveLoc, CurBuffer, getTok().getLoc(), Instantiation);
3905 ActiveMacros.push_back(MI);
3907 // Jump to the macro instantiation and prime the lexer.
3908 CurBuffer = SrcMgr.AddNewSourceBuffer(MI->Instantiation, SMLoc());
3909 Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
3913 bool AsmParser::parseDirectiveRept(SMLoc DirectiveLoc) {
3915 if (parseAbsoluteExpression(Count))
3916 return TokError("unexpected token in '.rept' directive");
3919 return TokError("Count is negative");
3921 if (Lexer.isNot(AsmToken::EndOfStatement))
3922 return TokError("unexpected token in '.rept' directive");
3924 // Eat the end of statement.
3927 // Lex the rept definition.
3928 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
3932 // Macro instantiation is lexical, unfortunately. We construct a new buffer
3933 // to hold the macro body with substitutions.
3934 SmallString<256> Buf;
3935 MCAsmMacroParameters Parameters;
3936 MCAsmMacroArguments A;
3937 raw_svector_ostream OS(Buf);
3939 if (expandMacro(OS, M->Body, Parameters, A, getTok().getLoc()))
3942 instantiateMacroLikeBody(M, DirectiveLoc, OS);
3947 /// parseDirectiveIrp
3948 /// ::= .irp symbol,values
3949 bool AsmParser::parseDirectiveIrp(SMLoc DirectiveLoc) {
3950 MCAsmMacroParameters Parameters;
3951 MCAsmMacroParameter Parameter;
3953 if (parseIdentifier(Parameter.first))
3954 return TokError("expected identifier in '.irp' directive");
3956 Parameters.push_back(Parameter);
3958 if (Lexer.isNot(AsmToken::Comma))
3959 return TokError("expected comma in '.irp' directive");
3963 MCAsmMacroArguments A;
3964 if (parseMacroArguments(0, A))
3967 // Eat the end of statement.
3970 // Lex the irp definition.
3971 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
3975 // Macro instantiation is lexical, unfortunately. We construct a new buffer
3976 // to hold the macro body with substitutions.
3977 SmallString<256> Buf;
3978 raw_svector_ostream OS(Buf);
3980 for (MCAsmMacroArguments::iterator i = A.begin(), e = A.end(); i != e; ++i) {
3981 MCAsmMacroArguments Args;
3984 if (expandMacro(OS, M->Body, Parameters, Args, getTok().getLoc()))
3988 instantiateMacroLikeBody(M, DirectiveLoc, OS);
3993 /// parseDirectiveIrpc
3994 /// ::= .irpc symbol,values
3995 bool AsmParser::parseDirectiveIrpc(SMLoc DirectiveLoc) {
3996 MCAsmMacroParameters Parameters;
3997 MCAsmMacroParameter Parameter;
3999 if (parseIdentifier(Parameter.first))
4000 return TokError("expected identifier in '.irpc' directive");
4002 Parameters.push_back(Parameter);
4004 if (Lexer.isNot(AsmToken::Comma))
4005 return TokError("expected comma in '.irpc' directive");
4009 MCAsmMacroArguments A;
4010 if (parseMacroArguments(0, A))
4013 if (A.size() != 1 || A.front().size() != 1)
4014 return TokError("unexpected token in '.irpc' directive");
4016 // Eat the end of statement.
4019 // Lex the irpc definition.
4020 MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
4024 // Macro instantiation is lexical, unfortunately. We construct a new buffer
4025 // to hold the macro body with substitutions.
4026 SmallString<256> Buf;
4027 raw_svector_ostream OS(Buf);
4029 StringRef Values = A.front().front().getString();
4030 std::size_t I, End = Values.size();
4031 for (I = 0; I < End; ++I) {
4032 MCAsmMacroArgument Arg;
4033 Arg.push_back(AsmToken(AsmToken::Identifier, Values.slice(I, I + 1)));
4035 MCAsmMacroArguments Args;
4036 Args.push_back(Arg);
4038 if (expandMacro(OS, M->Body, Parameters, Args, getTok().getLoc()))
4042 instantiateMacroLikeBody(M, DirectiveLoc, OS);
4047 bool AsmParser::parseDirectiveEndr(SMLoc DirectiveLoc) {
4048 if (ActiveMacros.empty())
4049 return TokError("unmatched '.endr' directive");
4051 // The only .repl that should get here are the ones created by
4052 // instantiateMacroLikeBody.
4053 assert(getLexer().is(AsmToken::EndOfStatement));
4059 bool AsmParser::parseDirectiveMSEmit(SMLoc IDLoc, ParseStatementInfo &Info,
4061 const MCExpr *Value;
4062 SMLoc ExprLoc = getLexer().getLoc();
4063 if (parseExpression(Value))
4065 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
4067 return Error(ExprLoc, "unexpected expression in _emit");
4068 uint64_t IntValue = MCE->getValue();
4069 if (!isUIntN(8, IntValue) && !isIntN(8, IntValue))
4070 return Error(ExprLoc, "literal value out of range for directive");
4072 Info.AsmRewrites->push_back(AsmRewrite(AOK_Emit, IDLoc, Len));
4076 bool AsmParser::parseDirectiveMSAlign(SMLoc IDLoc, ParseStatementInfo &Info) {
4077 const MCExpr *Value;
4078 SMLoc ExprLoc = getLexer().getLoc();
4079 if (parseExpression(Value))
4081 const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
4083 return Error(ExprLoc, "unexpected expression in align");
4084 uint64_t IntValue = MCE->getValue();
4085 if (!isPowerOf2_64(IntValue))
4086 return Error(ExprLoc, "literal value not a power of two greater then zero");
4088 Info.AsmRewrites->push_back(
4089 AsmRewrite(AOK_Align, IDLoc, 5, Log2_64(IntValue)));
4093 // We are comparing pointers, but the pointers are relative to a single string.
4094 // Thus, this should always be deterministic.
4095 static int rewritesSort(const AsmRewrite *AsmRewriteA,
4096 const AsmRewrite *AsmRewriteB) {
4097 if (AsmRewriteA->Loc.getPointer() < AsmRewriteB->Loc.getPointer())
4099 if (AsmRewriteB->Loc.getPointer() < AsmRewriteA->Loc.getPointer())
4102 // It's possible to have a SizeDirective, Imm/ImmPrefix and an Input/Output
4103 // rewrite to the same location. Make sure the SizeDirective rewrite is
4104 // performed first, then the Imm/ImmPrefix and finally the Input/Output. This
4105 // ensures the sort algorithm is stable.
4106 if (AsmRewritePrecedence[AsmRewriteA->Kind] >
4107 AsmRewritePrecedence[AsmRewriteB->Kind])
4110 if (AsmRewritePrecedence[AsmRewriteA->Kind] <
4111 AsmRewritePrecedence[AsmRewriteB->Kind])
4113 llvm_unreachable("Unstable rewrite sort.");
4116 bool AsmParser::parseMSInlineAsm(
4117 void *AsmLoc, std::string &AsmString, unsigned &NumOutputs,
4118 unsigned &NumInputs, SmallVectorImpl<std::pair<void *, bool> > &OpDecls,
4119 SmallVectorImpl<std::string> &Constraints,
4120 SmallVectorImpl<std::string> &Clobbers, const MCInstrInfo *MII,
4121 const MCInstPrinter *IP, MCAsmParserSemaCallback &SI) {
4122 SmallVector<void *, 4> InputDecls;
4123 SmallVector<void *, 4> OutputDecls;
4124 SmallVector<bool, 4> InputDeclsAddressOf;
4125 SmallVector<bool, 4> OutputDeclsAddressOf;
4126 SmallVector<std::string, 4> InputConstraints;
4127 SmallVector<std::string, 4> OutputConstraints;
4128 SmallVector<unsigned, 4> ClobberRegs;
4130 SmallVector<AsmRewrite, 4> AsmStrRewrites;
4135 // While we have input, parse each statement.
4136 unsigned InputIdx = 0;
4137 unsigned OutputIdx = 0;
4138 while (getLexer().isNot(AsmToken::Eof)) {
4139 ParseStatementInfo Info(&AsmStrRewrites);
4140 if (parseStatement(Info))
4143 if (Info.ParseError)
4146 if (Info.Opcode == ~0U)
4149 const MCInstrDesc &Desc = MII->get(Info.Opcode);
4151 // Build the list of clobbers, outputs and inputs.
4152 for (unsigned i = 1, e = Info.ParsedOperands.size(); i != e; ++i) {
4153 MCParsedAsmOperand *Operand = Info.ParsedOperands[i];
4156 if (Operand->isImm())
4159 // Register operand.
4160 if (Operand->isReg() && !Operand->needAddressOf()) {
4161 unsigned NumDefs = Desc.getNumDefs();
4163 if (NumDefs && Operand->getMCOperandNum() < NumDefs)
4164 ClobberRegs.push_back(Operand->getReg());
4168 // Expr/Input or Output.
4169 StringRef SymName = Operand->getSymName();
4170 if (SymName.empty())
4173 void *OpDecl = Operand->getOpDecl();
4177 bool isOutput = (i == 1) && Desc.mayStore();
4178 SMLoc Start = SMLoc::getFromPointer(SymName.data());
4181 OutputDecls.push_back(OpDecl);
4182 OutputDeclsAddressOf.push_back(Operand->needAddressOf());
4183 OutputConstraints.push_back('=' + Operand->getConstraint().str());
4184 AsmStrRewrites.push_back(AsmRewrite(AOK_Output, Start, SymName.size()));
4186 InputDecls.push_back(OpDecl);
4187 InputDeclsAddressOf.push_back(Operand->needAddressOf());
4188 InputConstraints.push_back(Operand->getConstraint().str());
4189 AsmStrRewrites.push_back(AsmRewrite(AOK_Input, Start, SymName.size()));
4194 // Set the number of Outputs and Inputs.
4195 NumOutputs = OutputDecls.size();
4196 NumInputs = InputDecls.size();
4198 // Set the unique clobbers.
4199 array_pod_sort(ClobberRegs.begin(), ClobberRegs.end());
4200 ClobberRegs.erase(std::unique(ClobberRegs.begin(), ClobberRegs.end()),
4202 Clobbers.assign(ClobberRegs.size(), std::string());
4203 for (unsigned I = 0, E = ClobberRegs.size(); I != E; ++I) {
4204 raw_string_ostream OS(Clobbers[I]);
4205 IP->printRegName(OS, ClobberRegs[I]);
4208 // Merge the various outputs and inputs. Output are expected first.
4209 if (NumOutputs || NumInputs) {
4210 unsigned NumExprs = NumOutputs + NumInputs;
4211 OpDecls.resize(NumExprs);
4212 Constraints.resize(NumExprs);
4213 for (unsigned i = 0; i < NumOutputs; ++i) {
4214 OpDecls[i] = std::make_pair(OutputDecls[i], OutputDeclsAddressOf[i]);
4215 Constraints[i] = OutputConstraints[i];
4217 for (unsigned i = 0, j = NumOutputs; i < NumInputs; ++i, ++j) {
4218 OpDecls[j] = std::make_pair(InputDecls[i], InputDeclsAddressOf[i]);
4219 Constraints[j] = InputConstraints[i];
4223 // Build the IR assembly string.
4224 std::string AsmStringIR;
4225 raw_string_ostream OS(AsmStringIR);
4226 const char *AsmStart = SrcMgr.getMemoryBuffer(0)->getBufferStart();
4227 const char *AsmEnd = SrcMgr.getMemoryBuffer(0)->getBufferEnd();
4228 array_pod_sort(AsmStrRewrites.begin(), AsmStrRewrites.end(), rewritesSort);
4229 for (SmallVectorImpl<AsmRewrite>::iterator I = AsmStrRewrites.begin(),
4230 E = AsmStrRewrites.end();
4232 AsmRewriteKind Kind = (*I).Kind;
4233 if (Kind == AOK_Delete)
4236 const char *Loc = (*I).Loc.getPointer();
4237 assert(Loc >= AsmStart && "Expected Loc to be at or after Start!");
4239 // Emit everything up to the immediate/expression.
4240 unsigned Len = Loc - AsmStart;
4242 OS << StringRef(AsmStart, Len);
4244 // Skip the original expression.
4245 if (Kind == AOK_Skip) {
4246 AsmStart = Loc + (*I).Len;
4250 unsigned AdditionalSkip = 0;
4251 // Rewrite expressions in $N notation.
4256 OS << "$$" << (*I).Val;
4262 OS << '$' << InputIdx++;
4265 OS << '$' << OutputIdx++;
4267 case AOK_SizeDirective:
4270 case 8: OS << "byte ptr "; break;
4271 case 16: OS << "word ptr "; break;
4272 case 32: OS << "dword ptr "; break;
4273 case 64: OS << "qword ptr "; break;
4274 case 80: OS << "xword ptr "; break;
4275 case 128: OS << "xmmword ptr "; break;
4276 case 256: OS << "ymmword ptr "; break;
4283 unsigned Val = (*I).Val;
4284 OS << ".align " << Val;
4286 // Skip the original immediate.
4287 assert(Val < 10 && "Expected alignment less then 2^10.");
4288 AdditionalSkip = (Val < 4) ? 2 : Val < 7 ? 3 : 4;
4291 case AOK_DotOperator:
4296 // Skip the original expression.
4297 AsmStart = Loc + (*I).Len + AdditionalSkip;
4300 // Emit the remainder of the asm string.
4301 if (AsmStart != AsmEnd)
4302 OS << StringRef(AsmStart, AsmEnd - AsmStart);
4304 AsmString = OS.str();
4308 /// \brief Create an MCAsmParser instance.
4309 MCAsmParser *llvm::createMCAsmParser(SourceMgr &SM, MCContext &C,
4310 MCStreamer &Out, const MCAsmInfo &MAI) {
4311 return new AsmParser(SM, C, Out, MAI);