| File: | lib/MC/MCParser/AsmParser.cpp |
| Warning: | line 3399, column 7 Value stored to 'FileNumber' is never read |
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| 1 | //===- AsmParser.cpp - Parser for Assembly Files --------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This class implements the parser for assembly files. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "llvm/ADT/APFloat.h" |
| 15 | #include "llvm/ADT/APInt.h" |
| 16 | #include "llvm/ADT/ArrayRef.h" |
| 17 | #include "llvm/ADT/None.h" |
| 18 | #include "llvm/ADT/STLExtras.h" |
| 19 | #include "llvm/ADT/SmallString.h" |
| 20 | #include "llvm/ADT/SmallVector.h" |
| 21 | #include "llvm/ADT/StringExtras.h" |
| 22 | #include "llvm/ADT/StringMap.h" |
| 23 | #include "llvm/ADT/StringRef.h" |
| 24 | #include "llvm/ADT/Twine.h" |
| 25 | #include "llvm/BinaryFormat/Dwarf.h" |
| 26 | #include "llvm/MC/MCAsmInfo.h" |
| 27 | #include "llvm/MC/MCCodeView.h" |
| 28 | #include "llvm/MC/MCContext.h" |
| 29 | #include "llvm/MC/MCDirectives.h" |
| 30 | #include "llvm/MC/MCDwarf.h" |
| 31 | #include "llvm/MC/MCExpr.h" |
| 32 | #include "llvm/MC/MCInstPrinter.h" |
| 33 | #include "llvm/MC/MCInstrDesc.h" |
| 34 | #include "llvm/MC/MCInstrInfo.h" |
| 35 | #include "llvm/MC/MCObjectFileInfo.h" |
| 36 | #include "llvm/MC/MCParser/AsmCond.h" |
| 37 | #include "llvm/MC/MCParser/AsmLexer.h" |
| 38 | #include "llvm/MC/MCParser/MCAsmLexer.h" |
| 39 | #include "llvm/MC/MCParser/MCAsmParser.h" |
| 40 | #include "llvm/MC/MCParser/MCAsmParserExtension.h" |
| 41 | #include "llvm/MC/MCParser/MCAsmParserUtils.h" |
| 42 | #include "llvm/MC/MCParser/MCParsedAsmOperand.h" |
| 43 | #include "llvm/MC/MCParser/MCTargetAsmParser.h" |
| 44 | #include "llvm/MC/MCRegisterInfo.h" |
| 45 | #include "llvm/MC/MCSection.h" |
| 46 | #include "llvm/MC/MCStreamer.h" |
| 47 | #include "llvm/MC/MCSymbol.h" |
| 48 | #include "llvm/MC/MCTargetOptions.h" |
| 49 | #include "llvm/MC/MCValue.h" |
| 50 | #include "llvm/Support/Casting.h" |
| 51 | #include "llvm/Support/CommandLine.h" |
| 52 | #include "llvm/Support/ErrorHandling.h" |
| 53 | #include "llvm/Support/MD5.h" |
| 54 | #include "llvm/Support/MathExtras.h" |
| 55 | #include "llvm/Support/MemoryBuffer.h" |
| 56 | #include "llvm/Support/SMLoc.h" |
| 57 | #include "llvm/Support/SourceMgr.h" |
| 58 | #include "llvm/Support/raw_ostream.h" |
| 59 | #include <algorithm> |
| 60 | #include <cassert> |
| 61 | #include <cctype> |
| 62 | #include <climits> |
| 63 | #include <cstddef> |
| 64 | #include <cstdint> |
| 65 | #include <deque> |
| 66 | #include <memory> |
| 67 | #include <sstream> |
| 68 | #include <string> |
| 69 | #include <tuple> |
| 70 | #include <utility> |
| 71 | #include <vector> |
| 72 | |
| 73 | using namespace llvm; |
| 74 | |
| 75 | MCAsmParserSemaCallback::~MCAsmParserSemaCallback() = default; |
| 76 | |
| 77 | static cl::opt<unsigned> AsmMacroMaxNestingDepth( |
| 78 | "asm-macro-max-nesting-depth", cl::init(20), cl::Hidden, |
| 79 | cl::desc("The maximum nesting depth allowed for assembly macros.")); |
| 80 | |
| 81 | namespace { |
| 82 | |
| 83 | /// Helper types for tracking macro definitions. |
| 84 | typedef std::vector<AsmToken> MCAsmMacroArgument; |
| 85 | typedef std::vector<MCAsmMacroArgument> MCAsmMacroArguments; |
| 86 | |
| 87 | /// Helper class for storing information about an active macro |
| 88 | /// instantiation. |
| 89 | struct MacroInstantiation { |
| 90 | /// The location of the instantiation. |
| 91 | SMLoc InstantiationLoc; |
| 92 | |
| 93 | /// The buffer where parsing should resume upon instantiation completion. |
| 94 | int ExitBuffer; |
| 95 | |
| 96 | /// The location where parsing should resume upon instantiation completion. |
| 97 | SMLoc ExitLoc; |
| 98 | |
| 99 | /// The depth of TheCondStack at the start of the instantiation. |
| 100 | size_t CondStackDepth; |
| 101 | |
| 102 | public: |
| 103 | MacroInstantiation(SMLoc IL, int EB, SMLoc EL, size_t CondStackDepth); |
| 104 | }; |
| 105 | |
| 106 | struct ParseStatementInfo { |
| 107 | /// The parsed operands from the last parsed statement. |
| 108 | SmallVector<std::unique_ptr<MCParsedAsmOperand>, 8> ParsedOperands; |
| 109 | |
| 110 | /// The opcode from the last parsed instruction. |
| 111 | unsigned Opcode = ~0U; |
| 112 | |
| 113 | /// Was there an error parsing the inline assembly? |
| 114 | bool ParseError = false; |
| 115 | |
| 116 | SmallVectorImpl<AsmRewrite> *AsmRewrites = nullptr; |
| 117 | |
| 118 | ParseStatementInfo() = delete; |
| 119 | ParseStatementInfo(SmallVectorImpl<AsmRewrite> *rewrites) |
| 120 | : AsmRewrites(rewrites) {} |
| 121 | }; |
| 122 | |
| 123 | /// The concrete assembly parser instance. |
| 124 | class AsmParser : public MCAsmParser { |
| 125 | private: |
| 126 | AsmLexer Lexer; |
| 127 | MCContext &Ctx; |
| 128 | MCStreamer &Out; |
| 129 | const MCAsmInfo &MAI; |
| 130 | SourceMgr &SrcMgr; |
| 131 | SourceMgr::DiagHandlerTy SavedDiagHandler; |
| 132 | void *SavedDiagContext; |
| 133 | std::unique_ptr<MCAsmParserExtension> PlatformParser; |
| 134 | |
| 135 | /// This is the current buffer index we're lexing from as managed by the |
| 136 | /// SourceMgr object. |
| 137 | unsigned CurBuffer; |
| 138 | |
| 139 | AsmCond TheCondState; |
| 140 | std::vector<AsmCond> TheCondStack; |
| 141 | |
| 142 | /// maps directive names to handler methods in parser |
| 143 | /// extensions. Extensions register themselves in this map by calling |
| 144 | /// addDirectiveHandler. |
| 145 | StringMap<ExtensionDirectiveHandler> ExtensionDirectiveMap; |
| 146 | |
| 147 | /// Stack of active macro instantiations. |
| 148 | std::vector<MacroInstantiation*> ActiveMacros; |
| 149 | |
| 150 | /// List of bodies of anonymous macros. |
| 151 | std::deque<MCAsmMacro> MacroLikeBodies; |
| 152 | |
| 153 | /// Boolean tracking whether macro substitution is enabled. |
| 154 | unsigned MacrosEnabledFlag : 1; |
| 155 | |
| 156 | /// Keeps track of how many .macro's have been instantiated. |
| 157 | unsigned NumOfMacroInstantiations; |
| 158 | |
| 159 | /// The values from the last parsed cpp hash file line comment if any. |
| 160 | struct CppHashInfoTy { |
| 161 | StringRef Filename; |
| 162 | int64_t LineNumber = 0; |
| 163 | SMLoc Loc; |
| 164 | unsigned Buf = 0; |
| 165 | }; |
| 166 | CppHashInfoTy CppHashInfo; |
| 167 | |
| 168 | /// List of forward directional labels for diagnosis at the end. |
| 169 | SmallVector<std::tuple<SMLoc, CppHashInfoTy, MCSymbol *>, 4> DirLabels; |
| 170 | |
| 171 | /// AssemblerDialect. ~OU means unset value and use value provided by MAI. |
| 172 | unsigned AssemblerDialect = ~0U; |
| 173 | |
| 174 | /// is Darwin compatibility enabled? |
| 175 | bool IsDarwin = false; |
| 176 | |
| 177 | /// Are we parsing ms-style inline assembly? |
| 178 | bool ParsingInlineAsm = false; |
| 179 | |
| 180 | /// Did we already inform the user about inconsistent MD5 usage? |
| 181 | bool ReportedInconsistentMD5 = false; |
| 182 | |
| 183 | // Is alt macro mode enabled. |
| 184 | bool AltMacroMode = false; |
| 185 | |
| 186 | public: |
| 187 | AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out, |
| 188 | const MCAsmInfo &MAI, unsigned CB); |
| 189 | AsmParser(const AsmParser &) = delete; |
| 190 | AsmParser &operator=(const AsmParser &) = delete; |
| 191 | ~AsmParser() override; |
| 192 | |
| 193 | bool Run(bool NoInitialTextSection, bool NoFinalize = false) override; |
| 194 | |
| 195 | void addDirectiveHandler(StringRef Directive, |
| 196 | ExtensionDirectiveHandler Handler) override { |
| 197 | ExtensionDirectiveMap[Directive] = Handler; |
| 198 | } |
| 199 | |
| 200 | void addAliasForDirective(StringRef Directive, StringRef Alias) override { |
| 201 | DirectiveKindMap[Directive] = DirectiveKindMap[Alias]; |
| 202 | } |
| 203 | |
| 204 | /// @name MCAsmParser Interface |
| 205 | /// { |
| 206 | |
| 207 | SourceMgr &getSourceManager() override { return SrcMgr; } |
| 208 | MCAsmLexer &getLexer() override { return Lexer; } |
| 209 | MCContext &getContext() override { return Ctx; } |
| 210 | MCStreamer &getStreamer() override { return Out; } |
| 211 | |
| 212 | CodeViewContext &getCVContext() { return Ctx.getCVContext(); } |
| 213 | |
| 214 | unsigned getAssemblerDialect() override { |
| 215 | if (AssemblerDialect == ~0U) |
| 216 | return MAI.getAssemblerDialect(); |
| 217 | else |
| 218 | return AssemblerDialect; |
| 219 | } |
| 220 | void setAssemblerDialect(unsigned i) override { |
| 221 | AssemblerDialect = i; |
| 222 | } |
| 223 | |
| 224 | void Note(SMLoc L, const Twine &Msg, SMRange Range = None) override; |
| 225 | bool Warning(SMLoc L, const Twine &Msg, SMRange Range = None) override; |
| 226 | bool printError(SMLoc L, const Twine &Msg, SMRange Range = None) override; |
| 227 | |
| 228 | const AsmToken &Lex() override; |
| 229 | |
| 230 | void setParsingInlineAsm(bool V) override { |
| 231 | ParsingInlineAsm = V; |
| 232 | // When parsing MS inline asm, we must lex 0b1101 and 0ABCH as binary and |
| 233 | // hex integer literals. |
| 234 | Lexer.setLexMasmIntegers(V); |
| 235 | } |
| 236 | bool isParsingInlineAsm() override { return ParsingInlineAsm; } |
| 237 | |
| 238 | bool parseMSInlineAsm(void *AsmLoc, std::string &AsmString, |
| 239 | unsigned &NumOutputs, unsigned &NumInputs, |
| 240 | SmallVectorImpl<std::pair<void *,bool>> &OpDecls, |
| 241 | SmallVectorImpl<std::string> &Constraints, |
| 242 | SmallVectorImpl<std::string> &Clobbers, |
| 243 | const MCInstrInfo *MII, const MCInstPrinter *IP, |
| 244 | MCAsmParserSemaCallback &SI) override; |
| 245 | |
| 246 | bool parseExpression(const MCExpr *&Res); |
| 247 | bool parseExpression(const MCExpr *&Res, SMLoc &EndLoc) override; |
| 248 | bool parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) override; |
| 249 | bool parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) override; |
| 250 | bool parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res, |
| 251 | SMLoc &EndLoc) override; |
| 252 | bool parseAbsoluteExpression(int64_t &Res) override; |
| 253 | |
| 254 | /// Parse a floating point expression using the float \p Semantics |
| 255 | /// and set \p Res to the value. |
| 256 | bool parseRealValue(const fltSemantics &Semantics, APInt &Res); |
| 257 | |
| 258 | /// Parse an identifier or string (as a quoted identifier) |
| 259 | /// and set \p Res to the identifier contents. |
| 260 | bool parseIdentifier(StringRef &Res) override; |
| 261 | void eatToEndOfStatement() override; |
| 262 | |
| 263 | bool checkForValidSection() override; |
| 264 | |
| 265 | /// } |
| 266 | |
| 267 | private: |
| 268 | bool parseStatement(ParseStatementInfo &Info, |
| 269 | MCAsmParserSemaCallback *SI); |
| 270 | bool parseCurlyBlockScope(SmallVectorImpl<AsmRewrite>& AsmStrRewrites); |
| 271 | bool parseCppHashLineFilenameComment(SMLoc L); |
| 272 | |
| 273 | void checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, StringRef Body, |
| 274 | ArrayRef<MCAsmMacroParameter> Parameters); |
| 275 | bool expandMacro(raw_svector_ostream &OS, StringRef Body, |
| 276 | ArrayRef<MCAsmMacroParameter> Parameters, |
| 277 | ArrayRef<MCAsmMacroArgument> A, bool EnableAtPseudoVariable, |
| 278 | SMLoc L); |
| 279 | |
| 280 | /// Are macros enabled in the parser? |
| 281 | bool areMacrosEnabled() {return MacrosEnabledFlag;} |
| 282 | |
| 283 | /// Control a flag in the parser that enables or disables macros. |
| 284 | void setMacrosEnabled(bool Flag) {MacrosEnabledFlag = Flag;} |
| 285 | |
| 286 | /// Are we inside a macro instantiation? |
| 287 | bool isInsideMacroInstantiation() {return !ActiveMacros.empty();} |
| 288 | |
| 289 | /// Handle entry to macro instantiation. |
| 290 | /// |
| 291 | /// \param M The macro. |
| 292 | /// \param NameLoc Instantiation location. |
| 293 | bool handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc); |
| 294 | |
| 295 | /// Handle exit from macro instantiation. |
| 296 | void handleMacroExit(); |
| 297 | |
| 298 | /// Extract AsmTokens for a macro argument. |
| 299 | bool parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg); |
| 300 | |
| 301 | /// Parse all macro arguments for a given macro. |
| 302 | bool parseMacroArguments(const MCAsmMacro *M, MCAsmMacroArguments &A); |
| 303 | |
| 304 | void printMacroInstantiations(); |
| 305 | void printMessage(SMLoc Loc, SourceMgr::DiagKind Kind, const Twine &Msg, |
| 306 | SMRange Range = None) const { |
| 307 | ArrayRef<SMRange> Ranges(Range); |
| 308 | SrcMgr.PrintMessage(Loc, Kind, Msg, Ranges); |
| 309 | } |
| 310 | static void DiagHandler(const SMDiagnostic &Diag, void *Context); |
| 311 | |
| 312 | /// Should we emit DWARF describing this assembler source? (Returns false if |
| 313 | /// the source has .file directives, which means we don't want to generate |
| 314 | /// info describing the assembler source itself.) |
| 315 | bool enabledGenDwarfForAssembly(); |
| 316 | |
| 317 | /// Enter the specified file. This returns true on failure. |
| 318 | bool enterIncludeFile(const std::string &Filename); |
| 319 | |
| 320 | /// Process the specified file for the .incbin directive. |
| 321 | /// This returns true on failure. |
| 322 | bool processIncbinFile(const std::string &Filename, int64_t Skip = 0, |
| 323 | const MCExpr *Count = nullptr, SMLoc Loc = SMLoc()); |
| 324 | |
| 325 | /// Reset the current lexer position to that given by \p Loc. The |
| 326 | /// current token is not set; clients should ensure Lex() is called |
| 327 | /// subsequently. |
| 328 | /// |
| 329 | /// \param InBuffer If not 0, should be the known buffer id that contains the |
| 330 | /// location. |
| 331 | void jumpToLoc(SMLoc Loc, unsigned InBuffer = 0); |
| 332 | |
| 333 | /// Parse up to the end of statement and a return the contents from the |
| 334 | /// current token until the end of the statement; the current token on exit |
| 335 | /// will be either the EndOfStatement or EOF. |
| 336 | StringRef parseStringToEndOfStatement() override; |
| 337 | |
| 338 | /// Parse until the end of a statement or a comma is encountered, |
| 339 | /// return the contents from the current token up to the end or comma. |
| 340 | StringRef parseStringToComma(); |
| 341 | |
| 342 | bool parseAssignment(StringRef Name, bool allow_redef, |
| 343 | bool NoDeadStrip = false); |
| 344 | |
| 345 | unsigned getBinOpPrecedence(AsmToken::TokenKind K, |
| 346 | MCBinaryExpr::Opcode &Kind); |
| 347 | |
| 348 | bool parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc); |
| 349 | bool parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc); |
| 350 | bool parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc); |
| 351 | |
| 352 | bool parseRegisterOrRegisterNumber(int64_t &Register, SMLoc DirectiveLoc); |
| 353 | |
| 354 | bool parseCVFunctionId(int64_t &FunctionId, StringRef DirectiveName); |
| 355 | bool parseCVFileId(int64_t &FileId, StringRef DirectiveName); |
| 356 | |
| 357 | // Generic (target and platform independent) directive parsing. |
| 358 | enum DirectiveKind { |
| 359 | DK_NO_DIRECTIVE, // Placeholder |
| 360 | DK_SET, |
| 361 | DK_EQU, |
| 362 | DK_EQUIV, |
| 363 | DK_ASCII, |
| 364 | DK_ASCIZ, |
| 365 | DK_STRING, |
| 366 | DK_BYTE, |
| 367 | DK_SHORT, |
| 368 | DK_RELOC, |
| 369 | DK_VALUE, |
| 370 | DK_2BYTE, |
| 371 | DK_LONG, |
| 372 | DK_INT, |
| 373 | DK_4BYTE, |
| 374 | DK_QUAD, |
| 375 | DK_8BYTE, |
| 376 | DK_OCTA, |
| 377 | DK_DC, |
| 378 | DK_DC_A, |
| 379 | DK_DC_B, |
| 380 | DK_DC_D, |
| 381 | DK_DC_L, |
| 382 | DK_DC_S, |
| 383 | DK_DC_W, |
| 384 | DK_DC_X, |
| 385 | DK_DCB, |
| 386 | DK_DCB_B, |
| 387 | DK_DCB_D, |
| 388 | DK_DCB_L, |
| 389 | DK_DCB_S, |
| 390 | DK_DCB_W, |
| 391 | DK_DCB_X, |
| 392 | DK_DS, |
| 393 | DK_DS_B, |
| 394 | DK_DS_D, |
| 395 | DK_DS_L, |
| 396 | DK_DS_P, |
| 397 | DK_DS_S, |
| 398 | DK_DS_W, |
| 399 | DK_DS_X, |
| 400 | DK_SINGLE, |
| 401 | DK_FLOAT, |
| 402 | DK_DOUBLE, |
| 403 | DK_ALIGN, |
| 404 | DK_ALIGN32, |
| 405 | DK_BALIGN, |
| 406 | DK_BALIGNW, |
| 407 | DK_BALIGNL, |
| 408 | DK_P2ALIGN, |
| 409 | DK_P2ALIGNW, |
| 410 | DK_P2ALIGNL, |
| 411 | DK_ORG, |
| 412 | DK_FILL, |
| 413 | DK_ENDR, |
| 414 | DK_BUNDLE_ALIGN_MODE, |
| 415 | DK_BUNDLE_LOCK, |
| 416 | DK_BUNDLE_UNLOCK, |
| 417 | DK_ZERO, |
| 418 | DK_EXTERN, |
| 419 | DK_GLOBL, |
| 420 | DK_GLOBAL, |
| 421 | DK_LAZY_REFERENCE, |
| 422 | DK_NO_DEAD_STRIP, |
| 423 | DK_SYMBOL_RESOLVER, |
| 424 | DK_PRIVATE_EXTERN, |
| 425 | DK_REFERENCE, |
| 426 | DK_WEAK_DEFINITION, |
| 427 | DK_WEAK_REFERENCE, |
| 428 | DK_WEAK_DEF_CAN_BE_HIDDEN, |
| 429 | DK_COMM, |
| 430 | DK_COMMON, |
| 431 | DK_LCOMM, |
| 432 | DK_ABORT, |
| 433 | DK_INCLUDE, |
| 434 | DK_INCBIN, |
| 435 | DK_CODE16, |
| 436 | DK_CODE16GCC, |
| 437 | DK_REPT, |
| 438 | DK_IRP, |
| 439 | DK_IRPC, |
| 440 | DK_IF, |
| 441 | DK_IFEQ, |
| 442 | DK_IFGE, |
| 443 | DK_IFGT, |
| 444 | DK_IFLE, |
| 445 | DK_IFLT, |
| 446 | DK_IFNE, |
| 447 | DK_IFB, |
| 448 | DK_IFNB, |
| 449 | DK_IFC, |
| 450 | DK_IFEQS, |
| 451 | DK_IFNC, |
| 452 | DK_IFNES, |
| 453 | DK_IFDEF, |
| 454 | DK_IFNDEF, |
| 455 | DK_IFNOTDEF, |
| 456 | DK_ELSEIF, |
| 457 | DK_ELSE, |
| 458 | DK_ENDIF, |
| 459 | DK_SPACE, |
| 460 | DK_SKIP, |
| 461 | DK_FILE, |
| 462 | DK_LINE, |
| 463 | DK_LOC, |
| 464 | DK_STABS, |
| 465 | DK_CV_FILE, |
| 466 | DK_CV_FUNC_ID, |
| 467 | DK_CV_INLINE_SITE_ID, |
| 468 | DK_CV_LOC, |
| 469 | DK_CV_LINETABLE, |
| 470 | DK_CV_INLINE_LINETABLE, |
| 471 | DK_CV_DEF_RANGE, |
| 472 | DK_CV_STRINGTABLE, |
| 473 | DK_CV_STRING, |
| 474 | DK_CV_FILECHECKSUMS, |
| 475 | DK_CV_FILECHECKSUM_OFFSET, |
| 476 | DK_CV_FPO_DATA, |
| 477 | DK_CFI_SECTIONS, |
| 478 | DK_CFI_STARTPROC, |
| 479 | DK_CFI_ENDPROC, |
| 480 | DK_CFI_DEF_CFA, |
| 481 | DK_CFI_DEF_CFA_OFFSET, |
| 482 | DK_CFI_ADJUST_CFA_OFFSET, |
| 483 | DK_CFI_DEF_CFA_REGISTER, |
| 484 | DK_CFI_OFFSET, |
| 485 | DK_CFI_REL_OFFSET, |
| 486 | DK_CFI_PERSONALITY, |
| 487 | DK_CFI_LSDA, |
| 488 | DK_CFI_REMEMBER_STATE, |
| 489 | DK_CFI_RESTORE_STATE, |
| 490 | DK_CFI_SAME_VALUE, |
| 491 | DK_CFI_RESTORE, |
| 492 | DK_CFI_ESCAPE, |
| 493 | DK_CFI_RETURN_COLUMN, |
| 494 | DK_CFI_SIGNAL_FRAME, |
| 495 | DK_CFI_UNDEFINED, |
| 496 | DK_CFI_REGISTER, |
| 497 | DK_CFI_WINDOW_SAVE, |
| 498 | DK_CFI_B_KEY_FRAME, |
| 499 | DK_MACROS_ON, |
| 500 | DK_MACROS_OFF, |
| 501 | DK_ALTMACRO, |
| 502 | DK_NOALTMACRO, |
| 503 | DK_MACRO, |
| 504 | DK_EXITM, |
| 505 | DK_ENDM, |
| 506 | DK_ENDMACRO, |
| 507 | DK_PURGEM, |
| 508 | DK_SLEB128, |
| 509 | DK_ULEB128, |
| 510 | DK_ERR, |
| 511 | DK_ERROR, |
| 512 | DK_WARNING, |
| 513 | DK_PRINT, |
| 514 | DK_ADDRSIG, |
| 515 | DK_ADDRSIG_SYM, |
| 516 | DK_END |
| 517 | }; |
| 518 | |
| 519 | /// Maps directive name --> DirectiveKind enum, for |
| 520 | /// directives parsed by this class. |
| 521 | StringMap<DirectiveKind> DirectiveKindMap; |
| 522 | |
| 523 | // ".ascii", ".asciz", ".string" |
| 524 | bool parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated); |
| 525 | bool parseDirectiveReloc(SMLoc DirectiveLoc); // ".reloc" |
| 526 | bool parseDirectiveValue(StringRef IDVal, |
| 527 | unsigned Size); // ".byte", ".long", ... |
| 528 | bool parseDirectiveOctaValue(StringRef IDVal); // ".octa", ... |
| 529 | bool parseDirectiveRealValue(StringRef IDVal, |
| 530 | const fltSemantics &); // ".single", ... |
| 531 | bool parseDirectiveFill(); // ".fill" |
| 532 | bool parseDirectiveZero(); // ".zero" |
| 533 | // ".set", ".equ", ".equiv" |
| 534 | bool parseDirectiveSet(StringRef IDVal, bool allow_redef); |
| 535 | bool parseDirectiveOrg(); // ".org" |
| 536 | // ".align{,32}", ".p2align{,w,l}" |
| 537 | bool parseDirectiveAlign(bool IsPow2, unsigned ValueSize); |
| 538 | |
| 539 | // ".file", ".line", ".loc", ".stabs" |
| 540 | bool parseDirectiveFile(SMLoc DirectiveLoc); |
| 541 | bool parseDirectiveLine(); |
| 542 | bool parseDirectiveLoc(); |
| 543 | bool parseDirectiveStabs(); |
| 544 | |
| 545 | // ".cv_file", ".cv_func_id", ".cv_inline_site_id", ".cv_loc", ".cv_linetable", |
| 546 | // ".cv_inline_linetable", ".cv_def_range", ".cv_string" |
| 547 | bool parseDirectiveCVFile(); |
| 548 | bool parseDirectiveCVFuncId(); |
| 549 | bool parseDirectiveCVInlineSiteId(); |
| 550 | bool parseDirectiveCVLoc(); |
| 551 | bool parseDirectiveCVLinetable(); |
| 552 | bool parseDirectiveCVInlineLinetable(); |
| 553 | bool parseDirectiveCVDefRange(); |
| 554 | bool parseDirectiveCVString(); |
| 555 | bool parseDirectiveCVStringTable(); |
| 556 | bool parseDirectiveCVFileChecksums(); |
| 557 | bool parseDirectiveCVFileChecksumOffset(); |
| 558 | bool parseDirectiveCVFPOData(); |
| 559 | |
| 560 | // .cfi directives |
| 561 | bool parseDirectiveCFIRegister(SMLoc DirectiveLoc); |
| 562 | bool parseDirectiveCFIWindowSave(); |
| 563 | bool parseDirectiveCFISections(); |
| 564 | bool parseDirectiveCFIStartProc(); |
| 565 | bool parseDirectiveCFIEndProc(); |
| 566 | bool parseDirectiveCFIDefCfaOffset(); |
| 567 | bool parseDirectiveCFIDefCfa(SMLoc DirectiveLoc); |
| 568 | bool parseDirectiveCFIAdjustCfaOffset(); |
| 569 | bool parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc); |
| 570 | bool parseDirectiveCFIOffset(SMLoc DirectiveLoc); |
| 571 | bool parseDirectiveCFIRelOffset(SMLoc DirectiveLoc); |
| 572 | bool parseDirectiveCFIPersonalityOrLsda(bool IsPersonality); |
| 573 | bool parseDirectiveCFIRememberState(); |
| 574 | bool parseDirectiveCFIRestoreState(); |
| 575 | bool parseDirectiveCFISameValue(SMLoc DirectiveLoc); |
| 576 | bool parseDirectiveCFIRestore(SMLoc DirectiveLoc); |
| 577 | bool parseDirectiveCFIEscape(); |
| 578 | bool parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc); |
| 579 | bool parseDirectiveCFISignalFrame(); |
| 580 | bool parseDirectiveCFIUndefined(SMLoc DirectiveLoc); |
| 581 | |
| 582 | // macro directives |
| 583 | bool parseDirectivePurgeMacro(SMLoc DirectiveLoc); |
| 584 | bool parseDirectiveExitMacro(StringRef Directive); |
| 585 | bool parseDirectiveEndMacro(StringRef Directive); |
| 586 | bool parseDirectiveMacro(SMLoc DirectiveLoc); |
| 587 | bool parseDirectiveMacrosOnOff(StringRef Directive); |
| 588 | // alternate macro mode directives |
| 589 | bool parseDirectiveAltmacro(StringRef Directive); |
| 590 | // ".bundle_align_mode" |
| 591 | bool parseDirectiveBundleAlignMode(); |
| 592 | // ".bundle_lock" |
| 593 | bool parseDirectiveBundleLock(); |
| 594 | // ".bundle_unlock" |
| 595 | bool parseDirectiveBundleUnlock(); |
| 596 | |
| 597 | // ".space", ".skip" |
| 598 | bool parseDirectiveSpace(StringRef IDVal); |
| 599 | |
| 600 | // ".dcb" |
| 601 | bool parseDirectiveDCB(StringRef IDVal, unsigned Size); |
| 602 | bool parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &); |
| 603 | // ".ds" |
| 604 | bool parseDirectiveDS(StringRef IDVal, unsigned Size); |
| 605 | |
| 606 | // .sleb128 (Signed=true) and .uleb128 (Signed=false) |
| 607 | bool parseDirectiveLEB128(bool Signed); |
| 608 | |
| 609 | /// Parse a directive like ".globl" which |
| 610 | /// accepts a single symbol (which should be a label or an external). |
| 611 | bool parseDirectiveSymbolAttribute(MCSymbolAttr Attr); |
| 612 | |
| 613 | bool parseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm" |
| 614 | |
| 615 | bool parseDirectiveAbort(); // ".abort" |
| 616 | bool parseDirectiveInclude(); // ".include" |
| 617 | bool parseDirectiveIncbin(); // ".incbin" |
| 618 | |
| 619 | // ".if", ".ifeq", ".ifge", ".ifgt" , ".ifle", ".iflt" or ".ifne" |
| 620 | bool parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind); |
| 621 | // ".ifb" or ".ifnb", depending on ExpectBlank. |
| 622 | bool parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank); |
| 623 | // ".ifc" or ".ifnc", depending on ExpectEqual. |
| 624 | bool parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual); |
| 625 | // ".ifeqs" or ".ifnes", depending on ExpectEqual. |
| 626 | bool parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual); |
| 627 | // ".ifdef" or ".ifndef", depending on expect_defined |
| 628 | bool parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined); |
| 629 | bool parseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif" |
| 630 | bool parseDirectiveElse(SMLoc DirectiveLoc); // ".else" |
| 631 | bool parseDirectiveEndIf(SMLoc DirectiveLoc); // .endif |
| 632 | bool parseEscapedString(std::string &Data) override; |
| 633 | |
| 634 | const MCExpr *applyModifierToExpr(const MCExpr *E, |
| 635 | MCSymbolRefExpr::VariantKind Variant); |
| 636 | |
| 637 | // Macro-like directives |
| 638 | MCAsmMacro *parseMacroLikeBody(SMLoc DirectiveLoc); |
| 639 | void instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc, |
| 640 | raw_svector_ostream &OS); |
| 641 | bool parseDirectiveRept(SMLoc DirectiveLoc, StringRef Directive); |
| 642 | bool parseDirectiveIrp(SMLoc DirectiveLoc); // ".irp" |
| 643 | bool parseDirectiveIrpc(SMLoc DirectiveLoc); // ".irpc" |
| 644 | bool parseDirectiveEndr(SMLoc DirectiveLoc); // ".endr" |
| 645 | |
| 646 | // "_emit" or "__emit" |
| 647 | bool parseDirectiveMSEmit(SMLoc DirectiveLoc, ParseStatementInfo &Info, |
| 648 | size_t Len); |
| 649 | |
| 650 | // "align" |
| 651 | bool parseDirectiveMSAlign(SMLoc DirectiveLoc, ParseStatementInfo &Info); |
| 652 | |
| 653 | // "end" |
| 654 | bool parseDirectiveEnd(SMLoc DirectiveLoc); |
| 655 | |
| 656 | // ".err" or ".error" |
| 657 | bool parseDirectiveError(SMLoc DirectiveLoc, bool WithMessage); |
| 658 | |
| 659 | // ".warning" |
| 660 | bool parseDirectiveWarning(SMLoc DirectiveLoc); |
| 661 | |
| 662 | // .print <double-quotes-string> |
| 663 | bool parseDirectivePrint(SMLoc DirectiveLoc); |
| 664 | |
| 665 | // Directives to support address-significance tables. |
| 666 | bool parseDirectiveAddrsig(); |
| 667 | bool parseDirectiveAddrsigSym(); |
| 668 | |
| 669 | void initializeDirectiveKindMap(); |
| 670 | }; |
| 671 | |
| 672 | } // end anonymous namespace |
| 673 | |
| 674 | namespace llvm { |
| 675 | |
| 676 | extern MCAsmParserExtension *createDarwinAsmParser(); |
| 677 | extern MCAsmParserExtension *createELFAsmParser(); |
| 678 | extern MCAsmParserExtension *createCOFFAsmParser(); |
| 679 | extern MCAsmParserExtension *createWasmAsmParser(); |
| 680 | |
| 681 | } // end namespace llvm |
| 682 | |
| 683 | enum { DEFAULT_ADDRSPACE = 0 }; |
| 684 | |
| 685 | AsmParser::AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out, |
| 686 | const MCAsmInfo &MAI, unsigned CB = 0) |
| 687 | : Lexer(MAI), Ctx(Ctx), Out(Out), MAI(MAI), SrcMgr(SM), |
| 688 | CurBuffer(CB ? CB : SM.getMainFileID()), MacrosEnabledFlag(true) { |
| 689 | HadError = false; |
| 690 | // Save the old handler. |
| 691 | SavedDiagHandler = SrcMgr.getDiagHandler(); |
| 692 | SavedDiagContext = SrcMgr.getDiagContext(); |
| 693 | // Set our own handler which calls the saved handler. |
| 694 | SrcMgr.setDiagHandler(DiagHandler, this); |
| 695 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); |
| 696 | |
| 697 | // Initialize the platform / file format parser. |
| 698 | switch (Ctx.getObjectFileInfo()->getObjectFileType()) { |
| 699 | case MCObjectFileInfo::IsCOFF: |
| 700 | PlatformParser.reset(createCOFFAsmParser()); |
| 701 | break; |
| 702 | case MCObjectFileInfo::IsMachO: |
| 703 | PlatformParser.reset(createDarwinAsmParser()); |
| 704 | IsDarwin = true; |
| 705 | break; |
| 706 | case MCObjectFileInfo::IsELF: |
| 707 | PlatformParser.reset(createELFAsmParser()); |
| 708 | break; |
| 709 | case MCObjectFileInfo::IsWasm: |
| 710 | PlatformParser.reset(createWasmAsmParser()); |
| 711 | break; |
| 712 | } |
| 713 | |
| 714 | PlatformParser->Initialize(*this); |
| 715 | initializeDirectiveKindMap(); |
| 716 | |
| 717 | NumOfMacroInstantiations = 0; |
| 718 | } |
| 719 | |
| 720 | AsmParser::~AsmParser() { |
| 721 | assert((HadError || ActiveMacros.empty()) &&(((HadError || ActiveMacros.empty()) && "Unexpected active macro instantiation!" ) ? static_cast<void> (0) : __assert_fail ("(HadError || ActiveMacros.empty()) && \"Unexpected active macro instantiation!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 722, __PRETTY_FUNCTION__)) |
| 722 | "Unexpected active macro instantiation!")(((HadError || ActiveMacros.empty()) && "Unexpected active macro instantiation!" ) ? static_cast<void> (0) : __assert_fail ("(HadError || ActiveMacros.empty()) && \"Unexpected active macro instantiation!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 722, __PRETTY_FUNCTION__)); |
| 723 | |
| 724 | // Restore the saved diagnostics handler and context for use during |
| 725 | // finalization. |
| 726 | SrcMgr.setDiagHandler(SavedDiagHandler, SavedDiagContext); |
| 727 | } |
| 728 | |
| 729 | void AsmParser::printMacroInstantiations() { |
| 730 | // Print the active macro instantiation stack. |
| 731 | for (std::vector<MacroInstantiation *>::const_reverse_iterator |
| 732 | it = ActiveMacros.rbegin(), |
| 733 | ie = ActiveMacros.rend(); |
| 734 | it != ie; ++it) |
| 735 | printMessage((*it)->InstantiationLoc, SourceMgr::DK_Note, |
| 736 | "while in macro instantiation"); |
| 737 | } |
| 738 | |
| 739 | void AsmParser::Note(SMLoc L, const Twine &Msg, SMRange Range) { |
| 740 | printPendingErrors(); |
| 741 | printMessage(L, SourceMgr::DK_Note, Msg, Range); |
| 742 | printMacroInstantiations(); |
| 743 | } |
| 744 | |
| 745 | bool AsmParser::Warning(SMLoc L, const Twine &Msg, SMRange Range) { |
| 746 | if(getTargetParser().getTargetOptions().MCNoWarn) |
| 747 | return false; |
| 748 | if (getTargetParser().getTargetOptions().MCFatalWarnings) |
| 749 | return Error(L, Msg, Range); |
| 750 | printMessage(L, SourceMgr::DK_Warning, Msg, Range); |
| 751 | printMacroInstantiations(); |
| 752 | return false; |
| 753 | } |
| 754 | |
| 755 | bool AsmParser::printError(SMLoc L, const Twine &Msg, SMRange Range) { |
| 756 | HadError = true; |
| 757 | printMessage(L, SourceMgr::DK_Error, Msg, Range); |
| 758 | printMacroInstantiations(); |
| 759 | return true; |
| 760 | } |
| 761 | |
| 762 | bool AsmParser::enterIncludeFile(const std::string &Filename) { |
| 763 | std::string IncludedFile; |
| 764 | unsigned NewBuf = |
| 765 | SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile); |
| 766 | if (!NewBuf) |
| 767 | return true; |
| 768 | |
| 769 | CurBuffer = NewBuf; |
| 770 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); |
| 771 | return false; |
| 772 | } |
| 773 | |
| 774 | /// Process the specified .incbin file by searching for it in the include paths |
| 775 | /// then just emitting the byte contents of the file to the streamer. This |
| 776 | /// returns true on failure. |
| 777 | bool AsmParser::processIncbinFile(const std::string &Filename, int64_t Skip, |
| 778 | const MCExpr *Count, SMLoc Loc) { |
| 779 | std::string IncludedFile; |
| 780 | unsigned NewBuf = |
| 781 | SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile); |
| 782 | if (!NewBuf) |
| 783 | return true; |
| 784 | |
| 785 | // Pick up the bytes from the file and emit them. |
| 786 | StringRef Bytes = SrcMgr.getMemoryBuffer(NewBuf)->getBuffer(); |
| 787 | Bytes = Bytes.drop_front(Skip); |
| 788 | if (Count) { |
| 789 | int64_t Res; |
| 790 | if (!Count->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr())) |
| 791 | return Error(Loc, "expected absolute expression"); |
| 792 | if (Res < 0) |
| 793 | return Warning(Loc, "negative count has no effect"); |
| 794 | Bytes = Bytes.take_front(Res); |
| 795 | } |
| 796 | getStreamer().EmitBytes(Bytes); |
| 797 | return false; |
| 798 | } |
| 799 | |
| 800 | void AsmParser::jumpToLoc(SMLoc Loc, unsigned InBuffer) { |
| 801 | CurBuffer = InBuffer ? InBuffer : SrcMgr.FindBufferContainingLoc(Loc); |
| 802 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer(), |
| 803 | Loc.getPointer()); |
| 804 | } |
| 805 | |
| 806 | const AsmToken &AsmParser::Lex() { |
| 807 | if (Lexer.getTok().is(AsmToken::Error)) |
| 808 | Error(Lexer.getErrLoc(), Lexer.getErr()); |
| 809 | |
| 810 | // if it's a end of statement with a comment in it |
| 811 | if (getTok().is(AsmToken::EndOfStatement)) { |
| 812 | // if this is a line comment output it. |
| 813 | if (!getTok().getString().empty() && getTok().getString().front() != '\n' && |
| 814 | getTok().getString().front() != '\r' && MAI.preserveAsmComments()) |
| 815 | Out.addExplicitComment(Twine(getTok().getString())); |
| 816 | } |
| 817 | |
| 818 | const AsmToken *tok = &Lexer.Lex(); |
| 819 | |
| 820 | // Parse comments here to be deferred until end of next statement. |
| 821 | while (tok->is(AsmToken::Comment)) { |
| 822 | if (MAI.preserveAsmComments()) |
| 823 | Out.addExplicitComment(Twine(tok->getString())); |
| 824 | tok = &Lexer.Lex(); |
| 825 | } |
| 826 | |
| 827 | if (tok->is(AsmToken::Eof)) { |
| 828 | // If this is the end of an included file, pop the parent file off the |
| 829 | // include stack. |
| 830 | SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer); |
| 831 | if (ParentIncludeLoc != SMLoc()) { |
| 832 | jumpToLoc(ParentIncludeLoc); |
| 833 | return Lex(); |
| 834 | } |
| 835 | } |
| 836 | |
| 837 | return *tok; |
| 838 | } |
| 839 | |
| 840 | bool AsmParser::enabledGenDwarfForAssembly() { |
| 841 | // Check whether the user specified -g. |
| 842 | if (!getContext().getGenDwarfForAssembly()) |
| 843 | return false; |
| 844 | // If we haven't encountered any .file directives (which would imply that |
| 845 | // the assembler source was produced with debug info already) then emit one |
| 846 | // describing the assembler source file itself. |
| 847 | if (getContext().getGenDwarfFileNumber() == 0) |
| 848 | getContext().setGenDwarfFileNumber(getStreamer().EmitDwarfFileDirective( |
| 849 | 0, StringRef(), getContext().getMainFileName())); |
| 850 | return true; |
| 851 | } |
| 852 | |
| 853 | bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) { |
| 854 | // Create the initial section, if requested. |
| 855 | if (!NoInitialTextSection) |
| 856 | Out.InitSections(false); |
| 857 | |
| 858 | // Prime the lexer. |
| 859 | Lex(); |
| 860 | |
| 861 | HadError = false; |
| 862 | AsmCond StartingCondState = TheCondState; |
| 863 | SmallVector<AsmRewrite, 4> AsmStrRewrites; |
| 864 | |
| 865 | // If we are generating dwarf for assembly source files save the initial text |
| 866 | // section. (Don't use enabledGenDwarfForAssembly() here, as we aren't |
| 867 | // emitting any actual debug info yet and haven't had a chance to parse any |
| 868 | // embedded .file directives.) |
| 869 | if (getContext().getGenDwarfForAssembly()) { |
| 870 | MCSection *Sec = getStreamer().getCurrentSectionOnly(); |
| 871 | if (!Sec->getBeginSymbol()) { |
| 872 | MCSymbol *SectionStartSym = getContext().createTempSymbol(); |
| 873 | getStreamer().EmitLabel(SectionStartSym); |
| 874 | Sec->setBeginSymbol(SectionStartSym); |
| 875 | } |
| 876 | bool InsertResult = getContext().addGenDwarfSection(Sec); |
| 877 | assert(InsertResult && ".text section should not have debug info yet")((InsertResult && ".text section should not have debug info yet" ) ? static_cast<void> (0) : __assert_fail ("InsertResult && \".text section should not have debug info yet\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 877, __PRETTY_FUNCTION__)); |
| 878 | (void)InsertResult; |
| 879 | } |
| 880 | |
| 881 | // While we have input, parse each statement. |
| 882 | while (Lexer.isNot(AsmToken::Eof)) { |
| 883 | ParseStatementInfo Info(&AsmStrRewrites); |
| 884 | if (!parseStatement(Info, nullptr)) |
| 885 | continue; |
| 886 | |
| 887 | // If we have a Lexer Error we are on an Error Token. Load in Lexer Error |
| 888 | // for printing ErrMsg via Lex() only if no (presumably better) parser error |
| 889 | // exists. |
| 890 | if (!hasPendingError() && Lexer.getTok().is(AsmToken::Error)) { |
| 891 | Lex(); |
| 892 | } |
| 893 | |
| 894 | // parseStatement returned true so may need to emit an error. |
| 895 | printPendingErrors(); |
| 896 | |
| 897 | // Skipping to the next line if needed. |
| 898 | if (!getLexer().isAtStartOfStatement()) |
| 899 | eatToEndOfStatement(); |
| 900 | } |
| 901 | |
| 902 | // All errors should have been emitted. |
| 903 | assert(!hasPendingError() && "unexpected error from parseStatement")((!hasPendingError() && "unexpected error from parseStatement" ) ? static_cast<void> (0) : __assert_fail ("!hasPendingError() && \"unexpected error from parseStatement\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 903, __PRETTY_FUNCTION__)); |
| 904 | |
| 905 | getTargetParser().flushPendingInstructions(getStreamer()); |
| 906 | |
| 907 | if (TheCondState.TheCond != StartingCondState.TheCond || |
| 908 | TheCondState.Ignore != StartingCondState.Ignore) |
| 909 | printError(getTok().getLoc(), "unmatched .ifs or .elses"); |
| 910 | // Check to see there are no empty DwarfFile slots. |
| 911 | const auto &LineTables = getContext().getMCDwarfLineTables(); |
| 912 | if (!LineTables.empty()) { |
| 913 | unsigned Index = 0; |
| 914 | for (const auto &File : LineTables.begin()->second.getMCDwarfFiles()) { |
| 915 | if (File.Name.empty() && Index != 0) |
| 916 | printError(getTok().getLoc(), "unassigned file number: " + |
| 917 | Twine(Index) + |
| 918 | " for .file directives"); |
| 919 | ++Index; |
| 920 | } |
| 921 | } |
| 922 | |
| 923 | // Check to see that all assembler local symbols were actually defined. |
| 924 | // Targets that don't do subsections via symbols may not want this, though, |
| 925 | // so conservatively exclude them. Only do this if we're finalizing, though, |
| 926 | // as otherwise we won't necessarilly have seen everything yet. |
| 927 | if (!NoFinalize) { |
| 928 | if (MAI.hasSubsectionsViaSymbols()) { |
| 929 | for (const auto &TableEntry : getContext().getSymbols()) { |
| 930 | MCSymbol *Sym = TableEntry.getValue(); |
| 931 | // Variable symbols may not be marked as defined, so check those |
| 932 | // explicitly. If we know it's a variable, we have a definition for |
| 933 | // the purposes of this check. |
| 934 | if (Sym->isTemporary() && !Sym->isVariable() && !Sym->isDefined()) |
| 935 | // FIXME: We would really like to refer back to where the symbol was |
| 936 | // first referenced for a source location. We need to add something |
| 937 | // to track that. Currently, we just point to the end of the file. |
| 938 | printError(getTok().getLoc(), "assembler local symbol '" + |
| 939 | Sym->getName() + "' not defined"); |
| 940 | } |
| 941 | } |
| 942 | |
| 943 | // Temporary symbols like the ones for directional jumps don't go in the |
| 944 | // symbol table. They also need to be diagnosed in all (final) cases. |
| 945 | for (std::tuple<SMLoc, CppHashInfoTy, MCSymbol *> &LocSym : DirLabels) { |
| 946 | if (std::get<2>(LocSym)->isUndefined()) { |
| 947 | // Reset the state of any "# line file" directives we've seen to the |
| 948 | // context as it was at the diagnostic site. |
| 949 | CppHashInfo = std::get<1>(LocSym); |
| 950 | printError(std::get<0>(LocSym), "directional label undefined"); |
| 951 | } |
| 952 | } |
| 953 | } |
| 954 | |
| 955 | // Finalize the output stream if there are no errors and if the client wants |
| 956 | // us to. |
| 957 | if (!HadError && !NoFinalize) |
| 958 | Out.Finish(); |
| 959 | |
| 960 | return HadError || getContext().hadError(); |
| 961 | } |
| 962 | |
| 963 | bool AsmParser::checkForValidSection() { |
| 964 | if (!ParsingInlineAsm && !getStreamer().getCurrentSectionOnly()) { |
| 965 | Out.InitSections(false); |
| 966 | return Error(getTok().getLoc(), |
| 967 | "expected section directive before assembly directive"); |
| 968 | } |
| 969 | return false; |
| 970 | } |
| 971 | |
| 972 | /// Throw away the rest of the line for testing purposes. |
| 973 | void AsmParser::eatToEndOfStatement() { |
| 974 | while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof)) |
| 975 | Lexer.Lex(); |
| 976 | |
| 977 | // Eat EOL. |
| 978 | if (Lexer.is(AsmToken::EndOfStatement)) |
| 979 | Lexer.Lex(); |
| 980 | } |
| 981 | |
| 982 | StringRef AsmParser::parseStringToEndOfStatement() { |
| 983 | const char *Start = getTok().getLoc().getPointer(); |
| 984 | |
| 985 | while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof)) |
| 986 | Lexer.Lex(); |
| 987 | |
| 988 | const char *End = getTok().getLoc().getPointer(); |
| 989 | return StringRef(Start, End - Start); |
| 990 | } |
| 991 | |
| 992 | StringRef AsmParser::parseStringToComma() { |
| 993 | const char *Start = getTok().getLoc().getPointer(); |
| 994 | |
| 995 | while (Lexer.isNot(AsmToken::EndOfStatement) && |
| 996 | Lexer.isNot(AsmToken::Comma) && Lexer.isNot(AsmToken::Eof)) |
| 997 | Lexer.Lex(); |
| 998 | |
| 999 | const char *End = getTok().getLoc().getPointer(); |
| 1000 | return StringRef(Start, End - Start); |
| 1001 | } |
| 1002 | |
| 1003 | /// Parse a paren expression and return it. |
| 1004 | /// NOTE: This assumes the leading '(' has already been consumed. |
| 1005 | /// |
| 1006 | /// parenexpr ::= expr) |
| 1007 | /// |
| 1008 | bool AsmParser::parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc) { |
| 1009 | if (parseExpression(Res)) |
| 1010 | return true; |
| 1011 | if (Lexer.isNot(AsmToken::RParen)) |
| 1012 | return TokError("expected ')' in parentheses expression"); |
| 1013 | EndLoc = Lexer.getTok().getEndLoc(); |
| 1014 | Lex(); |
| 1015 | return false; |
| 1016 | } |
| 1017 | |
| 1018 | /// Parse a bracket expression and return it. |
| 1019 | /// NOTE: This assumes the leading '[' has already been consumed. |
| 1020 | /// |
| 1021 | /// bracketexpr ::= expr] |
| 1022 | /// |
| 1023 | bool AsmParser::parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc) { |
| 1024 | if (parseExpression(Res)) |
| 1025 | return true; |
| 1026 | EndLoc = getTok().getEndLoc(); |
| 1027 | if (parseToken(AsmToken::RBrac, "expected ']' in brackets expression")) |
| 1028 | return true; |
| 1029 | return false; |
| 1030 | } |
| 1031 | |
| 1032 | /// Parse a primary expression and return it. |
| 1033 | /// primaryexpr ::= (parenexpr |
| 1034 | /// primaryexpr ::= symbol |
| 1035 | /// primaryexpr ::= number |
| 1036 | /// primaryexpr ::= '.' |
| 1037 | /// primaryexpr ::= ~,+,- primaryexpr |
| 1038 | bool AsmParser::parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) { |
| 1039 | SMLoc FirstTokenLoc = getLexer().getLoc(); |
| 1040 | AsmToken::TokenKind FirstTokenKind = Lexer.getKind(); |
| 1041 | switch (FirstTokenKind) { |
| 1042 | default: |
| 1043 | return TokError("unknown token in expression"); |
| 1044 | // If we have an error assume that we've already handled it. |
| 1045 | case AsmToken::Error: |
| 1046 | return true; |
| 1047 | case AsmToken::Exclaim: |
| 1048 | Lex(); // Eat the operator. |
| 1049 | if (parsePrimaryExpr(Res, EndLoc)) |
| 1050 | return true; |
| 1051 | Res = MCUnaryExpr::createLNot(Res, getContext(), FirstTokenLoc); |
| 1052 | return false; |
| 1053 | case AsmToken::Dollar: |
| 1054 | case AsmToken::At: |
| 1055 | case AsmToken::String: |
| 1056 | case AsmToken::Identifier: { |
| 1057 | StringRef Identifier; |
| 1058 | if (parseIdentifier(Identifier)) { |
| 1059 | // We may have failed but $ may be a valid token. |
| 1060 | if (getTok().is(AsmToken::Dollar)) { |
| 1061 | if (Lexer.getMAI().getDollarIsPC()) { |
| 1062 | Lex(); |
| 1063 | // This is a '$' reference, which references the current PC. Emit a |
| 1064 | // temporary label to the streamer and refer to it. |
| 1065 | MCSymbol *Sym = Ctx.createTempSymbol(); |
| 1066 | Out.EmitLabel(Sym); |
| 1067 | Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, |
| 1068 | getContext()); |
| 1069 | EndLoc = FirstTokenLoc; |
| 1070 | return false; |
| 1071 | } |
| 1072 | return Error(FirstTokenLoc, "invalid token in expression"); |
| 1073 | } |
| 1074 | } |
| 1075 | // Parse symbol variant |
| 1076 | std::pair<StringRef, StringRef> Split; |
| 1077 | if (!MAI.useParensForSymbolVariant()) { |
| 1078 | if (FirstTokenKind == AsmToken::String) { |
| 1079 | if (Lexer.is(AsmToken::At)) { |
| 1080 | Lex(); // eat @ |
| 1081 | SMLoc AtLoc = getLexer().getLoc(); |
| 1082 | StringRef VName; |
| 1083 | if (parseIdentifier(VName)) |
| 1084 | return Error(AtLoc, "expected symbol variant after '@'"); |
| 1085 | |
| 1086 | Split = std::make_pair(Identifier, VName); |
| 1087 | } |
| 1088 | } else { |
| 1089 | Split = Identifier.split('@'); |
| 1090 | } |
| 1091 | } else if (Lexer.is(AsmToken::LParen)) { |
| 1092 | Lex(); // eat '('. |
| 1093 | StringRef VName; |
| 1094 | parseIdentifier(VName); |
| 1095 | // eat ')'. |
| 1096 | if (parseToken(AsmToken::RParen, |
| 1097 | "unexpected token in variant, expected ')'")) |
| 1098 | return true; |
| 1099 | Split = std::make_pair(Identifier, VName); |
| 1100 | } |
| 1101 | |
| 1102 | EndLoc = SMLoc::getFromPointer(Identifier.end()); |
| 1103 | |
| 1104 | // This is a symbol reference. |
| 1105 | StringRef SymbolName = Identifier; |
| 1106 | if (SymbolName.empty()) |
| 1107 | return Error(getLexer().getLoc(), "expected a symbol reference"); |
| 1108 | |
| 1109 | MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; |
| 1110 | |
| 1111 | // Lookup the symbol variant if used. |
| 1112 | if (!Split.second.empty()) { |
| 1113 | Variant = MCSymbolRefExpr::getVariantKindForName(Split.second); |
| 1114 | if (Variant != MCSymbolRefExpr::VK_Invalid) { |
| 1115 | SymbolName = Split.first; |
| 1116 | } else if (MAI.doesAllowAtInName() && !MAI.useParensForSymbolVariant()) { |
| 1117 | Variant = MCSymbolRefExpr::VK_None; |
| 1118 | } else { |
| 1119 | return Error(SMLoc::getFromPointer(Split.second.begin()), |
| 1120 | "invalid variant '" + Split.second + "'"); |
| 1121 | } |
| 1122 | } |
| 1123 | |
| 1124 | MCSymbol *Sym = getContext().getOrCreateSymbol(SymbolName); |
| 1125 | |
| 1126 | // If this is an absolute variable reference, substitute it now to preserve |
| 1127 | // semantics in the face of reassignment. |
| 1128 | if (Sym->isVariable()) { |
| 1129 | auto V = Sym->getVariableValue(/*SetUsed*/ false); |
| 1130 | bool DoInline = isa<MCConstantExpr>(V) && !Variant; |
| 1131 | if (auto TV = dyn_cast<MCTargetExpr>(V)) |
| 1132 | DoInline = TV->inlineAssignedExpr(); |
| 1133 | if (DoInline) { |
| 1134 | if (Variant) |
| 1135 | return Error(EndLoc, "unexpected modifier on variable reference"); |
| 1136 | Res = Sym->getVariableValue(/*SetUsed*/ false); |
| 1137 | return false; |
| 1138 | } |
| 1139 | } |
| 1140 | |
| 1141 | // Otherwise create a symbol ref. |
| 1142 | Res = MCSymbolRefExpr::create(Sym, Variant, getContext(), FirstTokenLoc); |
| 1143 | return false; |
| 1144 | } |
| 1145 | case AsmToken::BigNum: |
| 1146 | return TokError("literal value out of range for directive"); |
| 1147 | case AsmToken::Integer: { |
| 1148 | SMLoc Loc = getTok().getLoc(); |
| 1149 | int64_t IntVal = getTok().getIntVal(); |
| 1150 | Res = MCConstantExpr::create(IntVal, getContext()); |
| 1151 | EndLoc = Lexer.getTok().getEndLoc(); |
| 1152 | Lex(); // Eat token. |
| 1153 | // Look for 'b' or 'f' following an Integer as a directional label |
| 1154 | if (Lexer.getKind() == AsmToken::Identifier) { |
| 1155 | StringRef IDVal = getTok().getString(); |
| 1156 | // Lookup the symbol variant if used. |
| 1157 | std::pair<StringRef, StringRef> Split = IDVal.split('@'); |
| 1158 | MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; |
| 1159 | if (Split.first.size() != IDVal.size()) { |
| 1160 | Variant = MCSymbolRefExpr::getVariantKindForName(Split.second); |
| 1161 | if (Variant == MCSymbolRefExpr::VK_Invalid) |
| 1162 | return TokError("invalid variant '" + Split.second + "'"); |
| 1163 | IDVal = Split.first; |
| 1164 | } |
| 1165 | if (IDVal == "f" || IDVal == "b") { |
| 1166 | MCSymbol *Sym = |
| 1167 | Ctx.getDirectionalLocalSymbol(IntVal, IDVal == "b"); |
| 1168 | Res = MCSymbolRefExpr::create(Sym, Variant, getContext()); |
| 1169 | if (IDVal == "b" && Sym->isUndefined()) |
| 1170 | return Error(Loc, "directional label undefined"); |
| 1171 | DirLabels.push_back(std::make_tuple(Loc, CppHashInfo, Sym)); |
| 1172 | EndLoc = Lexer.getTok().getEndLoc(); |
| 1173 | Lex(); // Eat identifier. |
| 1174 | } |
| 1175 | } |
| 1176 | return false; |
| 1177 | } |
| 1178 | case AsmToken::Real: { |
| 1179 | APFloat RealVal(APFloat::IEEEdouble(), getTok().getString()); |
| 1180 | uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue(); |
| 1181 | Res = MCConstantExpr::create(IntVal, getContext()); |
| 1182 | EndLoc = Lexer.getTok().getEndLoc(); |
| 1183 | Lex(); // Eat token. |
| 1184 | return false; |
| 1185 | } |
| 1186 | case AsmToken::Dot: { |
| 1187 | // This is a '.' reference, which references the current PC. Emit a |
| 1188 | // temporary label to the streamer and refer to it. |
| 1189 | MCSymbol *Sym = Ctx.createTempSymbol(); |
| 1190 | Out.EmitLabel(Sym); |
| 1191 | Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, getContext()); |
| 1192 | EndLoc = Lexer.getTok().getEndLoc(); |
| 1193 | Lex(); // Eat identifier. |
| 1194 | return false; |
| 1195 | } |
| 1196 | case AsmToken::LParen: |
| 1197 | Lex(); // Eat the '('. |
| 1198 | return parseParenExpr(Res, EndLoc); |
| 1199 | case AsmToken::LBrac: |
| 1200 | if (!PlatformParser->HasBracketExpressions()) |
| 1201 | return TokError("brackets expression not supported on this target"); |
| 1202 | Lex(); // Eat the '['. |
| 1203 | return parseBracketExpr(Res, EndLoc); |
| 1204 | case AsmToken::Minus: |
| 1205 | Lex(); // Eat the operator. |
| 1206 | if (parsePrimaryExpr(Res, EndLoc)) |
| 1207 | return true; |
| 1208 | Res = MCUnaryExpr::createMinus(Res, getContext(), FirstTokenLoc); |
| 1209 | return false; |
| 1210 | case AsmToken::Plus: |
| 1211 | Lex(); // Eat the operator. |
| 1212 | if (parsePrimaryExpr(Res, EndLoc)) |
| 1213 | return true; |
| 1214 | Res = MCUnaryExpr::createPlus(Res, getContext(), FirstTokenLoc); |
| 1215 | return false; |
| 1216 | case AsmToken::Tilde: |
| 1217 | Lex(); // Eat the operator. |
| 1218 | if (parsePrimaryExpr(Res, EndLoc)) |
| 1219 | return true; |
| 1220 | Res = MCUnaryExpr::createNot(Res, getContext(), FirstTokenLoc); |
| 1221 | return false; |
| 1222 | // MIPS unary expression operators. The lexer won't generate these tokens if |
| 1223 | // MCAsmInfo::HasMipsExpressions is false for the target. |
| 1224 | case AsmToken::PercentCall16: |
| 1225 | case AsmToken::PercentCall_Hi: |
| 1226 | case AsmToken::PercentCall_Lo: |
| 1227 | case AsmToken::PercentDtprel_Hi: |
| 1228 | case AsmToken::PercentDtprel_Lo: |
| 1229 | case AsmToken::PercentGot: |
| 1230 | case AsmToken::PercentGot_Disp: |
| 1231 | case AsmToken::PercentGot_Hi: |
| 1232 | case AsmToken::PercentGot_Lo: |
| 1233 | case AsmToken::PercentGot_Ofst: |
| 1234 | case AsmToken::PercentGot_Page: |
| 1235 | case AsmToken::PercentGottprel: |
| 1236 | case AsmToken::PercentGp_Rel: |
| 1237 | case AsmToken::PercentHi: |
| 1238 | case AsmToken::PercentHigher: |
| 1239 | case AsmToken::PercentHighest: |
| 1240 | case AsmToken::PercentLo: |
| 1241 | case AsmToken::PercentNeg: |
| 1242 | case AsmToken::PercentPcrel_Hi: |
| 1243 | case AsmToken::PercentPcrel_Lo: |
| 1244 | case AsmToken::PercentTlsgd: |
| 1245 | case AsmToken::PercentTlsldm: |
| 1246 | case AsmToken::PercentTprel_Hi: |
| 1247 | case AsmToken::PercentTprel_Lo: |
| 1248 | Lex(); // Eat the operator. |
| 1249 | if (Lexer.isNot(AsmToken::LParen)) |
| 1250 | return TokError("expected '(' after operator"); |
| 1251 | Lex(); // Eat the operator. |
| 1252 | if (parseExpression(Res, EndLoc)) |
| 1253 | return true; |
| 1254 | if (Lexer.isNot(AsmToken::RParen)) |
| 1255 | return TokError("expected ')'"); |
| 1256 | Lex(); // Eat the operator. |
| 1257 | Res = getTargetParser().createTargetUnaryExpr(Res, FirstTokenKind, Ctx); |
| 1258 | return !Res; |
| 1259 | } |
| 1260 | } |
| 1261 | |
| 1262 | bool AsmParser::parseExpression(const MCExpr *&Res) { |
| 1263 | SMLoc EndLoc; |
| 1264 | return parseExpression(Res, EndLoc); |
| 1265 | } |
| 1266 | |
| 1267 | const MCExpr * |
| 1268 | AsmParser::applyModifierToExpr(const MCExpr *E, |
| 1269 | MCSymbolRefExpr::VariantKind Variant) { |
| 1270 | // Ask the target implementation about this expression first. |
| 1271 | const MCExpr *NewE = getTargetParser().applyModifierToExpr(E, Variant, Ctx); |
| 1272 | if (NewE) |
| 1273 | return NewE; |
| 1274 | // Recurse over the given expression, rebuilding it to apply the given variant |
| 1275 | // if there is exactly one symbol. |
| 1276 | switch (E->getKind()) { |
| 1277 | case MCExpr::Target: |
| 1278 | case MCExpr::Constant: |
| 1279 | return nullptr; |
| 1280 | |
| 1281 | case MCExpr::SymbolRef: { |
| 1282 | const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E); |
| 1283 | |
| 1284 | if (SRE->getKind() != MCSymbolRefExpr::VK_None) { |
| 1285 | TokError("invalid variant on expression '" + getTok().getIdentifier() + |
| 1286 | "' (already modified)"); |
| 1287 | return E; |
| 1288 | } |
| 1289 | |
| 1290 | return MCSymbolRefExpr::create(&SRE->getSymbol(), Variant, getContext()); |
| 1291 | } |
| 1292 | |
| 1293 | case MCExpr::Unary: { |
| 1294 | const MCUnaryExpr *UE = cast<MCUnaryExpr>(E); |
| 1295 | const MCExpr *Sub = applyModifierToExpr(UE->getSubExpr(), Variant); |
| 1296 | if (!Sub) |
| 1297 | return nullptr; |
| 1298 | return MCUnaryExpr::create(UE->getOpcode(), Sub, getContext()); |
| 1299 | } |
| 1300 | |
| 1301 | case MCExpr::Binary: { |
| 1302 | const MCBinaryExpr *BE = cast<MCBinaryExpr>(E); |
| 1303 | const MCExpr *LHS = applyModifierToExpr(BE->getLHS(), Variant); |
| 1304 | const MCExpr *RHS = applyModifierToExpr(BE->getRHS(), Variant); |
| 1305 | |
| 1306 | if (!LHS && !RHS) |
| 1307 | return nullptr; |
| 1308 | |
| 1309 | if (!LHS) |
| 1310 | LHS = BE->getLHS(); |
| 1311 | if (!RHS) |
| 1312 | RHS = BE->getRHS(); |
| 1313 | |
| 1314 | return MCBinaryExpr::create(BE->getOpcode(), LHS, RHS, getContext()); |
| 1315 | } |
| 1316 | } |
| 1317 | |
| 1318 | llvm_unreachable("Invalid expression kind!")::llvm::llvm_unreachable_internal("Invalid expression kind!", "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 1318); |
| 1319 | } |
| 1320 | |
| 1321 | /// This function checks if the next token is <string> type or arithmetic. |
| 1322 | /// string that begin with character '<' must end with character '>'. |
| 1323 | /// otherwise it is arithmetics. |
| 1324 | /// If the function returns a 'true' value, |
| 1325 | /// the End argument will be filled with the last location pointed to the '>' |
| 1326 | /// character. |
| 1327 | |
| 1328 | /// There is a gap between the AltMacro's documentation and the single quote |
| 1329 | /// implementation. GCC does not fully support this feature and so we will not |
| 1330 | /// support it. |
| 1331 | /// TODO: Adding single quote as a string. |
| 1332 | static bool isAltmacroString(SMLoc &StrLoc, SMLoc &EndLoc) { |
| 1333 | assert((StrLoc.getPointer() != nullptr) &&(((StrLoc.getPointer() != nullptr) && "Argument to the function cannot be a NULL value" ) ? static_cast<void> (0) : __assert_fail ("(StrLoc.getPointer() != nullptr) && \"Argument to the function cannot be a NULL value\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 1334, __PRETTY_FUNCTION__)) |
| 1334 | "Argument to the function cannot be a NULL value")(((StrLoc.getPointer() != nullptr) && "Argument to the function cannot be a NULL value" ) ? static_cast<void> (0) : __assert_fail ("(StrLoc.getPointer() != nullptr) && \"Argument to the function cannot be a NULL value\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 1334, __PRETTY_FUNCTION__)); |
| 1335 | const char *CharPtr = StrLoc.getPointer(); |
| 1336 | while ((*CharPtr != '>') && (*CharPtr != '\n') && (*CharPtr != '\r') && |
| 1337 | (*CharPtr != '\0')) { |
| 1338 | if (*CharPtr == '!') |
| 1339 | CharPtr++; |
| 1340 | CharPtr++; |
| 1341 | } |
| 1342 | if (*CharPtr == '>') { |
| 1343 | EndLoc = StrLoc.getFromPointer(CharPtr + 1); |
| 1344 | return true; |
| 1345 | } |
| 1346 | return false; |
| 1347 | } |
| 1348 | |
| 1349 | /// creating a string without the escape characters '!'. |
| 1350 | static std::string altMacroString(StringRef AltMacroStr) { |
| 1351 | std::string Res; |
| 1352 | for (size_t Pos = 0; Pos < AltMacroStr.size(); Pos++) { |
| 1353 | if (AltMacroStr[Pos] == '!') |
| 1354 | Pos++; |
| 1355 | Res += AltMacroStr[Pos]; |
| 1356 | } |
| 1357 | return Res; |
| 1358 | } |
| 1359 | |
| 1360 | /// Parse an expression and return it. |
| 1361 | /// |
| 1362 | /// expr ::= expr &&,|| expr -> lowest. |
| 1363 | /// expr ::= expr |,^,&,! expr |
| 1364 | /// expr ::= expr ==,!=,<>,<,<=,>,>= expr |
| 1365 | /// expr ::= expr <<,>> expr |
| 1366 | /// expr ::= expr +,- expr |
| 1367 | /// expr ::= expr *,/,% expr -> highest. |
| 1368 | /// expr ::= primaryexpr |
| 1369 | /// |
| 1370 | bool AsmParser::parseExpression(const MCExpr *&Res, SMLoc &EndLoc) { |
| 1371 | // Parse the expression. |
| 1372 | Res = nullptr; |
| 1373 | if (getTargetParser().parsePrimaryExpr(Res, EndLoc) || |
| 1374 | parseBinOpRHS(1, Res, EndLoc)) |
| 1375 | return true; |
| 1376 | |
| 1377 | // As a special case, we support 'a op b @ modifier' by rewriting the |
| 1378 | // expression to include the modifier. This is inefficient, but in general we |
| 1379 | // expect users to use 'a@modifier op b'. |
| 1380 | if (Lexer.getKind() == AsmToken::At) { |
| 1381 | Lex(); |
| 1382 | |
| 1383 | if (Lexer.isNot(AsmToken::Identifier)) |
| 1384 | return TokError("unexpected symbol modifier following '@'"); |
| 1385 | |
| 1386 | MCSymbolRefExpr::VariantKind Variant = |
| 1387 | MCSymbolRefExpr::getVariantKindForName(getTok().getIdentifier()); |
| 1388 | if (Variant == MCSymbolRefExpr::VK_Invalid) |
| 1389 | return TokError("invalid variant '" + getTok().getIdentifier() + "'"); |
| 1390 | |
| 1391 | const MCExpr *ModifiedRes = applyModifierToExpr(Res, Variant); |
| 1392 | if (!ModifiedRes) { |
| 1393 | return TokError("invalid modifier '" + getTok().getIdentifier() + |
| 1394 | "' (no symbols present)"); |
| 1395 | } |
| 1396 | |
| 1397 | Res = ModifiedRes; |
| 1398 | Lex(); |
| 1399 | } |
| 1400 | |
| 1401 | // Try to constant fold it up front, if possible. Do not exploit |
| 1402 | // assembler here. |
| 1403 | int64_t Value; |
| 1404 | if (Res->evaluateAsAbsolute(Value)) |
| 1405 | Res = MCConstantExpr::create(Value, getContext()); |
| 1406 | |
| 1407 | return false; |
| 1408 | } |
| 1409 | |
| 1410 | bool AsmParser::parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) { |
| 1411 | Res = nullptr; |
| 1412 | return parseParenExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc); |
| 1413 | } |
| 1414 | |
| 1415 | bool AsmParser::parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res, |
| 1416 | SMLoc &EndLoc) { |
| 1417 | if (parseParenExpr(Res, EndLoc)) |
| 1418 | return true; |
| 1419 | |
| 1420 | for (; ParenDepth > 0; --ParenDepth) { |
| 1421 | if (parseBinOpRHS(1, Res, EndLoc)) |
| 1422 | return true; |
| 1423 | |
| 1424 | // We don't Lex() the last RParen. |
| 1425 | // This is the same behavior as parseParenExpression(). |
| 1426 | if (ParenDepth - 1 > 0) { |
| 1427 | EndLoc = getTok().getEndLoc(); |
| 1428 | if (parseToken(AsmToken::RParen, |
| 1429 | "expected ')' in parentheses expression")) |
| 1430 | return true; |
| 1431 | } |
| 1432 | } |
| 1433 | return false; |
| 1434 | } |
| 1435 | |
| 1436 | bool AsmParser::parseAbsoluteExpression(int64_t &Res) { |
| 1437 | const MCExpr *Expr; |
| 1438 | |
| 1439 | SMLoc StartLoc = Lexer.getLoc(); |
| 1440 | if (parseExpression(Expr)) |
| 1441 | return true; |
| 1442 | |
| 1443 | if (!Expr->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr())) |
| 1444 | return Error(StartLoc, "expected absolute expression"); |
| 1445 | |
| 1446 | return false; |
| 1447 | } |
| 1448 | |
| 1449 | static unsigned getDarwinBinOpPrecedence(AsmToken::TokenKind K, |
| 1450 | MCBinaryExpr::Opcode &Kind, |
| 1451 | bool ShouldUseLogicalShr) { |
| 1452 | switch (K) { |
| 1453 | default: |
| 1454 | return 0; // not a binop. |
| 1455 | |
| 1456 | // Lowest Precedence: &&, || |
| 1457 | case AsmToken::AmpAmp: |
| 1458 | Kind = MCBinaryExpr::LAnd; |
| 1459 | return 1; |
| 1460 | case AsmToken::PipePipe: |
| 1461 | Kind = MCBinaryExpr::LOr; |
| 1462 | return 1; |
| 1463 | |
| 1464 | // Low Precedence: |, &, ^ |
| 1465 | // |
| 1466 | // FIXME: gas seems to support '!' as an infix operator? |
| 1467 | case AsmToken::Pipe: |
| 1468 | Kind = MCBinaryExpr::Or; |
| 1469 | return 2; |
| 1470 | case AsmToken::Caret: |
| 1471 | Kind = MCBinaryExpr::Xor; |
| 1472 | return 2; |
| 1473 | case AsmToken::Amp: |
| 1474 | Kind = MCBinaryExpr::And; |
| 1475 | return 2; |
| 1476 | |
| 1477 | // Low Intermediate Precedence: ==, !=, <>, <, <=, >, >= |
| 1478 | case AsmToken::EqualEqual: |
| 1479 | Kind = MCBinaryExpr::EQ; |
| 1480 | return 3; |
| 1481 | case AsmToken::ExclaimEqual: |
| 1482 | case AsmToken::LessGreater: |
| 1483 | Kind = MCBinaryExpr::NE; |
| 1484 | return 3; |
| 1485 | case AsmToken::Less: |
| 1486 | Kind = MCBinaryExpr::LT; |
| 1487 | return 3; |
| 1488 | case AsmToken::LessEqual: |
| 1489 | Kind = MCBinaryExpr::LTE; |
| 1490 | return 3; |
| 1491 | case AsmToken::Greater: |
| 1492 | Kind = MCBinaryExpr::GT; |
| 1493 | return 3; |
| 1494 | case AsmToken::GreaterEqual: |
| 1495 | Kind = MCBinaryExpr::GTE; |
| 1496 | return 3; |
| 1497 | |
| 1498 | // Intermediate Precedence: <<, >> |
| 1499 | case AsmToken::LessLess: |
| 1500 | Kind = MCBinaryExpr::Shl; |
| 1501 | return 4; |
| 1502 | case AsmToken::GreaterGreater: |
| 1503 | Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr; |
| 1504 | return 4; |
| 1505 | |
| 1506 | // High Intermediate Precedence: +, - |
| 1507 | case AsmToken::Plus: |
| 1508 | Kind = MCBinaryExpr::Add; |
| 1509 | return 5; |
| 1510 | case AsmToken::Minus: |
| 1511 | Kind = MCBinaryExpr::Sub; |
| 1512 | return 5; |
| 1513 | |
| 1514 | // Highest Precedence: *, /, % |
| 1515 | case AsmToken::Star: |
| 1516 | Kind = MCBinaryExpr::Mul; |
| 1517 | return 6; |
| 1518 | case AsmToken::Slash: |
| 1519 | Kind = MCBinaryExpr::Div; |
| 1520 | return 6; |
| 1521 | case AsmToken::Percent: |
| 1522 | Kind = MCBinaryExpr::Mod; |
| 1523 | return 6; |
| 1524 | } |
| 1525 | } |
| 1526 | |
| 1527 | static unsigned getGNUBinOpPrecedence(AsmToken::TokenKind K, |
| 1528 | MCBinaryExpr::Opcode &Kind, |
| 1529 | bool ShouldUseLogicalShr) { |
| 1530 | switch (K) { |
| 1531 | default: |
| 1532 | return 0; // not a binop. |
| 1533 | |
| 1534 | // Lowest Precedence: &&, || |
| 1535 | case AsmToken::AmpAmp: |
| 1536 | Kind = MCBinaryExpr::LAnd; |
| 1537 | return 2; |
| 1538 | case AsmToken::PipePipe: |
| 1539 | Kind = MCBinaryExpr::LOr; |
| 1540 | return 1; |
| 1541 | |
| 1542 | // Low Precedence: ==, !=, <>, <, <=, >, >= |
| 1543 | case AsmToken::EqualEqual: |
| 1544 | Kind = MCBinaryExpr::EQ; |
| 1545 | return 3; |
| 1546 | case AsmToken::ExclaimEqual: |
| 1547 | case AsmToken::LessGreater: |
| 1548 | Kind = MCBinaryExpr::NE; |
| 1549 | return 3; |
| 1550 | case AsmToken::Less: |
| 1551 | Kind = MCBinaryExpr::LT; |
| 1552 | return 3; |
| 1553 | case AsmToken::LessEqual: |
| 1554 | Kind = MCBinaryExpr::LTE; |
| 1555 | return 3; |
| 1556 | case AsmToken::Greater: |
| 1557 | Kind = MCBinaryExpr::GT; |
| 1558 | return 3; |
| 1559 | case AsmToken::GreaterEqual: |
| 1560 | Kind = MCBinaryExpr::GTE; |
| 1561 | return 3; |
| 1562 | |
| 1563 | // Low Intermediate Precedence: +, - |
| 1564 | case AsmToken::Plus: |
| 1565 | Kind = MCBinaryExpr::Add; |
| 1566 | return 4; |
| 1567 | case AsmToken::Minus: |
| 1568 | Kind = MCBinaryExpr::Sub; |
| 1569 | return 4; |
| 1570 | |
| 1571 | // High Intermediate Precedence: |, &, ^ |
| 1572 | // |
| 1573 | // FIXME: gas seems to support '!' as an infix operator? |
| 1574 | case AsmToken::Pipe: |
| 1575 | Kind = MCBinaryExpr::Or; |
| 1576 | return 5; |
| 1577 | case AsmToken::Caret: |
| 1578 | Kind = MCBinaryExpr::Xor; |
| 1579 | return 5; |
| 1580 | case AsmToken::Amp: |
| 1581 | Kind = MCBinaryExpr::And; |
| 1582 | return 5; |
| 1583 | |
| 1584 | // Highest Precedence: *, /, %, <<, >> |
| 1585 | case AsmToken::Star: |
| 1586 | Kind = MCBinaryExpr::Mul; |
| 1587 | return 6; |
| 1588 | case AsmToken::Slash: |
| 1589 | Kind = MCBinaryExpr::Div; |
| 1590 | return 6; |
| 1591 | case AsmToken::Percent: |
| 1592 | Kind = MCBinaryExpr::Mod; |
| 1593 | return 6; |
| 1594 | case AsmToken::LessLess: |
| 1595 | Kind = MCBinaryExpr::Shl; |
| 1596 | return 6; |
| 1597 | case AsmToken::GreaterGreater: |
| 1598 | Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr; |
| 1599 | return 6; |
| 1600 | } |
| 1601 | } |
| 1602 | |
| 1603 | unsigned AsmParser::getBinOpPrecedence(AsmToken::TokenKind K, |
| 1604 | MCBinaryExpr::Opcode &Kind) { |
| 1605 | bool ShouldUseLogicalShr = MAI.shouldUseLogicalShr(); |
| 1606 | return IsDarwin ? getDarwinBinOpPrecedence(K, Kind, ShouldUseLogicalShr) |
| 1607 | : getGNUBinOpPrecedence(K, Kind, ShouldUseLogicalShr); |
| 1608 | } |
| 1609 | |
| 1610 | /// Parse all binary operators with precedence >= 'Precedence'. |
| 1611 | /// Res contains the LHS of the expression on input. |
| 1612 | bool AsmParser::parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, |
| 1613 | SMLoc &EndLoc) { |
| 1614 | SMLoc StartLoc = Lexer.getLoc(); |
| 1615 | while (true) { |
| 1616 | MCBinaryExpr::Opcode Kind = MCBinaryExpr::Add; |
| 1617 | unsigned TokPrec = getBinOpPrecedence(Lexer.getKind(), Kind); |
| 1618 | |
| 1619 | // If the next token is lower precedence than we are allowed to eat, return |
| 1620 | // successfully with what we ate already. |
| 1621 | if (TokPrec < Precedence) |
| 1622 | return false; |
| 1623 | |
| 1624 | Lex(); |
| 1625 | |
| 1626 | // Eat the next primary expression. |
| 1627 | const MCExpr *RHS; |
| 1628 | if (getTargetParser().parsePrimaryExpr(RHS, EndLoc)) |
| 1629 | return true; |
| 1630 | |
| 1631 | // If BinOp binds less tightly with RHS than the operator after RHS, let |
| 1632 | // the pending operator take RHS as its LHS. |
| 1633 | MCBinaryExpr::Opcode Dummy; |
| 1634 | unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy); |
| 1635 | if (TokPrec < NextTokPrec && parseBinOpRHS(TokPrec + 1, RHS, EndLoc)) |
| 1636 | return true; |
| 1637 | |
| 1638 | // Merge LHS and RHS according to operator. |
| 1639 | Res = MCBinaryExpr::create(Kind, Res, RHS, getContext(), StartLoc); |
| 1640 | } |
| 1641 | } |
| 1642 | |
| 1643 | /// ParseStatement: |
| 1644 | /// ::= EndOfStatement |
| 1645 | /// ::= Label* Directive ...Operands... EndOfStatement |
| 1646 | /// ::= Label* Identifier OperandList* EndOfStatement |
| 1647 | bool AsmParser::parseStatement(ParseStatementInfo &Info, |
| 1648 | MCAsmParserSemaCallback *SI) { |
| 1649 | assert(!hasPendingError() && "parseStatement started with pending error")((!hasPendingError() && "parseStatement started with pending error" ) ? static_cast<void> (0) : __assert_fail ("!hasPendingError() && \"parseStatement started with pending error\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 1649, __PRETTY_FUNCTION__)); |
| 1650 | // Eat initial spaces and comments |
| 1651 | while (Lexer.is(AsmToken::Space)) |
| 1652 | Lex(); |
| 1653 | if (Lexer.is(AsmToken::EndOfStatement)) { |
| 1654 | // if this is a line comment we can drop it safely |
| 1655 | if (getTok().getString().empty() || getTok().getString().front() == '\r' || |
| 1656 | getTok().getString().front() == '\n') |
| 1657 | Out.AddBlankLine(); |
| 1658 | Lex(); |
| 1659 | return false; |
| 1660 | } |
| 1661 | // Statements always start with an identifier. |
| 1662 | AsmToken ID = getTok(); |
| 1663 | SMLoc IDLoc = ID.getLoc(); |
| 1664 | StringRef IDVal; |
| 1665 | int64_t LocalLabelVal = -1; |
| 1666 | if (Lexer.is(AsmToken::HashDirective)) |
| 1667 | return parseCppHashLineFilenameComment(IDLoc); |
| 1668 | // Allow an integer followed by a ':' as a directional local label. |
| 1669 | if (Lexer.is(AsmToken::Integer)) { |
| 1670 | LocalLabelVal = getTok().getIntVal(); |
| 1671 | if (LocalLabelVal < 0) { |
| 1672 | if (!TheCondState.Ignore) { |
| 1673 | Lex(); // always eat a token |
| 1674 | return Error(IDLoc, "unexpected token at start of statement"); |
| 1675 | } |
| 1676 | IDVal = ""; |
| 1677 | } else { |
| 1678 | IDVal = getTok().getString(); |
| 1679 | Lex(); // Consume the integer token to be used as an identifier token. |
| 1680 | if (Lexer.getKind() != AsmToken::Colon) { |
| 1681 | if (!TheCondState.Ignore) { |
| 1682 | Lex(); // always eat a token |
| 1683 | return Error(IDLoc, "unexpected token at start of statement"); |
| 1684 | } |
| 1685 | } |
| 1686 | } |
| 1687 | } else if (Lexer.is(AsmToken::Dot)) { |
| 1688 | // Treat '.' as a valid identifier in this context. |
| 1689 | Lex(); |
| 1690 | IDVal = "."; |
| 1691 | } else if (Lexer.is(AsmToken::LCurly)) { |
| 1692 | // Treat '{' as a valid identifier in this context. |
| 1693 | Lex(); |
| 1694 | IDVal = "{"; |
| 1695 | |
| 1696 | } else if (Lexer.is(AsmToken::RCurly)) { |
| 1697 | // Treat '}' as a valid identifier in this context. |
| 1698 | Lex(); |
| 1699 | IDVal = "}"; |
| 1700 | } else if (Lexer.is(AsmToken::Star) && |
| 1701 | getTargetParser().starIsStartOfStatement()) { |
| 1702 | // Accept '*' as a valid start of statement. |
| 1703 | Lex(); |
| 1704 | IDVal = "*"; |
| 1705 | } else if (parseIdentifier(IDVal)) { |
| 1706 | if (!TheCondState.Ignore) { |
| 1707 | Lex(); // always eat a token |
| 1708 | return Error(IDLoc, "unexpected token at start of statement"); |
| 1709 | } |
| 1710 | IDVal = ""; |
| 1711 | } |
| 1712 | |
| 1713 | // Handle conditional assembly here before checking for skipping. We |
| 1714 | // have to do this so that .endif isn't skipped in a ".if 0" block for |
| 1715 | // example. |
| 1716 | StringMap<DirectiveKind>::const_iterator DirKindIt = |
| 1717 | DirectiveKindMap.find(IDVal); |
| 1718 | DirectiveKind DirKind = (DirKindIt == DirectiveKindMap.end()) |
| 1719 | ? DK_NO_DIRECTIVE |
| 1720 | : DirKindIt->getValue(); |
| 1721 | switch (DirKind) { |
| 1722 | default: |
| 1723 | break; |
| 1724 | case DK_IF: |
| 1725 | case DK_IFEQ: |
| 1726 | case DK_IFGE: |
| 1727 | case DK_IFGT: |
| 1728 | case DK_IFLE: |
| 1729 | case DK_IFLT: |
| 1730 | case DK_IFNE: |
| 1731 | return parseDirectiveIf(IDLoc, DirKind); |
| 1732 | case DK_IFB: |
| 1733 | return parseDirectiveIfb(IDLoc, true); |
| 1734 | case DK_IFNB: |
| 1735 | return parseDirectiveIfb(IDLoc, false); |
| 1736 | case DK_IFC: |
| 1737 | return parseDirectiveIfc(IDLoc, true); |
| 1738 | case DK_IFEQS: |
| 1739 | return parseDirectiveIfeqs(IDLoc, true); |
| 1740 | case DK_IFNC: |
| 1741 | return parseDirectiveIfc(IDLoc, false); |
| 1742 | case DK_IFNES: |
| 1743 | return parseDirectiveIfeqs(IDLoc, false); |
| 1744 | case DK_IFDEF: |
| 1745 | return parseDirectiveIfdef(IDLoc, true); |
| 1746 | case DK_IFNDEF: |
| 1747 | case DK_IFNOTDEF: |
| 1748 | return parseDirectiveIfdef(IDLoc, false); |
| 1749 | case DK_ELSEIF: |
| 1750 | return parseDirectiveElseIf(IDLoc); |
| 1751 | case DK_ELSE: |
| 1752 | return parseDirectiveElse(IDLoc); |
| 1753 | case DK_ENDIF: |
| 1754 | return parseDirectiveEndIf(IDLoc); |
| 1755 | } |
| 1756 | |
| 1757 | // Ignore the statement if in the middle of inactive conditional |
| 1758 | // (e.g. ".if 0"). |
| 1759 | if (TheCondState.Ignore) { |
| 1760 | eatToEndOfStatement(); |
| 1761 | return false; |
| 1762 | } |
| 1763 | |
| 1764 | // FIXME: Recurse on local labels? |
| 1765 | |
| 1766 | // See what kind of statement we have. |
| 1767 | switch (Lexer.getKind()) { |
| 1768 | case AsmToken::Colon: { |
| 1769 | if (!getTargetParser().isLabel(ID)) |
| 1770 | break; |
| 1771 | if (checkForValidSection()) |
| 1772 | return true; |
| 1773 | |
| 1774 | // identifier ':' -> Label. |
| 1775 | Lex(); |
| 1776 | |
| 1777 | // Diagnose attempt to use '.' as a label. |
| 1778 | if (IDVal == ".") |
| 1779 | return Error(IDLoc, "invalid use of pseudo-symbol '.' as a label"); |
| 1780 | |
| 1781 | // Diagnose attempt to use a variable as a label. |
| 1782 | // |
| 1783 | // FIXME: Diagnostics. Note the location of the definition as a label. |
| 1784 | // FIXME: This doesn't diagnose assignment to a symbol which has been |
| 1785 | // implicitly marked as external. |
| 1786 | MCSymbol *Sym; |
| 1787 | if (LocalLabelVal == -1) { |
| 1788 | if (ParsingInlineAsm && SI) { |
| 1789 | StringRef RewrittenLabel = |
| 1790 | SI->LookupInlineAsmLabel(IDVal, getSourceManager(), IDLoc, true); |
| 1791 | assert(!RewrittenLabel.empty() &&((!RewrittenLabel.empty() && "We should have an internal name here." ) ? static_cast<void> (0) : __assert_fail ("!RewrittenLabel.empty() && \"We should have an internal name here.\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 1792, __PRETTY_FUNCTION__)) |
| 1792 | "We should have an internal name here.")((!RewrittenLabel.empty() && "We should have an internal name here." ) ? static_cast<void> (0) : __assert_fail ("!RewrittenLabel.empty() && \"We should have an internal name here.\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 1792, __PRETTY_FUNCTION__)); |
| 1793 | Info.AsmRewrites->emplace_back(AOK_Label, IDLoc, IDVal.size(), |
| 1794 | RewrittenLabel); |
| 1795 | IDVal = RewrittenLabel; |
| 1796 | } |
| 1797 | Sym = getContext().getOrCreateSymbol(IDVal); |
| 1798 | } else |
| 1799 | Sym = Ctx.createDirectionalLocalSymbol(LocalLabelVal); |
| 1800 | // End of Labels should be treated as end of line for lexing |
| 1801 | // purposes but that information is not available to the Lexer who |
| 1802 | // does not understand Labels. This may cause us to see a Hash |
| 1803 | // here instead of a preprocessor line comment. |
| 1804 | if (getTok().is(AsmToken::Hash)) { |
| 1805 | StringRef CommentStr = parseStringToEndOfStatement(); |
| 1806 | Lexer.Lex(); |
| 1807 | Lexer.UnLex(AsmToken(AsmToken::EndOfStatement, CommentStr)); |
| 1808 | } |
| 1809 | |
| 1810 | // Consume any end of statement token, if present, to avoid spurious |
| 1811 | // AddBlankLine calls(). |
| 1812 | if (getTok().is(AsmToken::EndOfStatement)) { |
| 1813 | Lex(); |
| 1814 | } |
| 1815 | |
| 1816 | getTargetParser().doBeforeLabelEmit(Sym); |
| 1817 | |
| 1818 | // Emit the label. |
| 1819 | if (!getTargetParser().isParsingInlineAsm()) |
| 1820 | Out.EmitLabel(Sym, IDLoc); |
| 1821 | |
| 1822 | // If we are generating dwarf for assembly source files then gather the |
| 1823 | // info to make a dwarf label entry for this label if needed. |
| 1824 | if (enabledGenDwarfForAssembly()) |
| 1825 | MCGenDwarfLabelEntry::Make(Sym, &getStreamer(), getSourceManager(), |
| 1826 | IDLoc); |
| 1827 | |
| 1828 | getTargetParser().onLabelParsed(Sym); |
| 1829 | |
| 1830 | return false; |
| 1831 | } |
| 1832 | |
| 1833 | case AsmToken::Equal: |
| 1834 | if (!getTargetParser().equalIsAsmAssignment()) |
| 1835 | break; |
| 1836 | // identifier '=' ... -> assignment statement |
| 1837 | Lex(); |
| 1838 | |
| 1839 | return parseAssignment(IDVal, true); |
| 1840 | |
| 1841 | default: // Normal instruction or directive. |
| 1842 | break; |
| 1843 | } |
| 1844 | |
| 1845 | // If macros are enabled, check to see if this is a macro instantiation. |
| 1846 | if (areMacrosEnabled()) |
| 1847 | if (const MCAsmMacro *M = getContext().lookupMacro(IDVal)) { |
| 1848 | return handleMacroEntry(M, IDLoc); |
| 1849 | } |
| 1850 | |
| 1851 | // Otherwise, we have a normal instruction or directive. |
| 1852 | |
| 1853 | // Directives start with "." |
| 1854 | if (IDVal.startswith(".") && IDVal != ".") { |
| 1855 | // There are several entities interested in parsing directives: |
| 1856 | // |
| 1857 | // 1. The target-specific assembly parser. Some directives are target |
| 1858 | // specific or may potentially behave differently on certain targets. |
| 1859 | // 2. Asm parser extensions. For example, platform-specific parsers |
| 1860 | // (like the ELF parser) register themselves as extensions. |
| 1861 | // 3. The generic directive parser implemented by this class. These are |
| 1862 | // all the directives that behave in a target and platform independent |
| 1863 | // manner, or at least have a default behavior that's shared between |
| 1864 | // all targets and platforms. |
| 1865 | |
| 1866 | getTargetParser().flushPendingInstructions(getStreamer()); |
| 1867 | |
| 1868 | SMLoc StartTokLoc = getTok().getLoc(); |
| 1869 | bool TPDirectiveReturn = getTargetParser().ParseDirective(ID); |
| 1870 | |
| 1871 | if (hasPendingError()) |
| 1872 | return true; |
| 1873 | // Currently the return value should be true if we are |
| 1874 | // uninterested but as this is at odds with the standard parsing |
| 1875 | // convention (return true = error) we have instances of a parsed |
| 1876 | // directive that fails returning true as an error. Catch these |
| 1877 | // cases as best as possible errors here. |
| 1878 | if (TPDirectiveReturn && StartTokLoc != getTok().getLoc()) |
| 1879 | return true; |
| 1880 | // Return if we did some parsing or believe we succeeded. |
| 1881 | if (!TPDirectiveReturn || StartTokLoc != getTok().getLoc()) |
| 1882 | return false; |
| 1883 | |
| 1884 | // Next, check the extension directive map to see if any extension has |
| 1885 | // registered itself to parse this directive. |
| 1886 | std::pair<MCAsmParserExtension *, DirectiveHandler> Handler = |
| 1887 | ExtensionDirectiveMap.lookup(IDVal); |
| 1888 | if (Handler.first) |
| 1889 | return (*Handler.second)(Handler.first, IDVal, IDLoc); |
| 1890 | |
| 1891 | // Finally, if no one else is interested in this directive, it must be |
| 1892 | // generic and familiar to this class. |
| 1893 | switch (DirKind) { |
| 1894 | default: |
| 1895 | break; |
| 1896 | case DK_SET: |
| 1897 | case DK_EQU: |
| 1898 | return parseDirectiveSet(IDVal, true); |
| 1899 | case DK_EQUIV: |
| 1900 | return parseDirectiveSet(IDVal, false); |
| 1901 | case DK_ASCII: |
| 1902 | return parseDirectiveAscii(IDVal, false); |
| 1903 | case DK_ASCIZ: |
| 1904 | case DK_STRING: |
| 1905 | return parseDirectiveAscii(IDVal, true); |
| 1906 | case DK_BYTE: |
| 1907 | case DK_DC_B: |
| 1908 | return parseDirectiveValue(IDVal, 1); |
| 1909 | case DK_DC: |
| 1910 | case DK_DC_W: |
| 1911 | case DK_SHORT: |
| 1912 | case DK_VALUE: |
| 1913 | case DK_2BYTE: |
| 1914 | return parseDirectiveValue(IDVal, 2); |
| 1915 | case DK_LONG: |
| 1916 | case DK_INT: |
| 1917 | case DK_4BYTE: |
| 1918 | case DK_DC_L: |
| 1919 | return parseDirectiveValue(IDVal, 4); |
| 1920 | case DK_QUAD: |
| 1921 | case DK_8BYTE: |
| 1922 | return parseDirectiveValue(IDVal, 8); |
| 1923 | case DK_DC_A: |
| 1924 | return parseDirectiveValue( |
| 1925 | IDVal, getContext().getAsmInfo()->getCodePointerSize()); |
| 1926 | case DK_OCTA: |
| 1927 | return parseDirectiveOctaValue(IDVal); |
| 1928 | case DK_SINGLE: |
| 1929 | case DK_FLOAT: |
| 1930 | case DK_DC_S: |
| 1931 | return parseDirectiveRealValue(IDVal, APFloat::IEEEsingle()); |
| 1932 | case DK_DOUBLE: |
| 1933 | case DK_DC_D: |
| 1934 | return parseDirectiveRealValue(IDVal, APFloat::IEEEdouble()); |
| 1935 | case DK_ALIGN: { |
| 1936 | bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes(); |
| 1937 | return parseDirectiveAlign(IsPow2, /*ExprSize=*/1); |
| 1938 | } |
| 1939 | case DK_ALIGN32: { |
| 1940 | bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes(); |
| 1941 | return parseDirectiveAlign(IsPow2, /*ExprSize=*/4); |
| 1942 | } |
| 1943 | case DK_BALIGN: |
| 1944 | return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1); |
| 1945 | case DK_BALIGNW: |
| 1946 | return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2); |
| 1947 | case DK_BALIGNL: |
| 1948 | return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4); |
| 1949 | case DK_P2ALIGN: |
| 1950 | return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1); |
| 1951 | case DK_P2ALIGNW: |
| 1952 | return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2); |
| 1953 | case DK_P2ALIGNL: |
| 1954 | return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4); |
| 1955 | case DK_ORG: |
| 1956 | return parseDirectiveOrg(); |
| 1957 | case DK_FILL: |
| 1958 | return parseDirectiveFill(); |
| 1959 | case DK_ZERO: |
| 1960 | return parseDirectiveZero(); |
| 1961 | case DK_EXTERN: |
| 1962 | eatToEndOfStatement(); // .extern is the default, ignore it. |
| 1963 | return false; |
| 1964 | case DK_GLOBL: |
| 1965 | case DK_GLOBAL: |
| 1966 | return parseDirectiveSymbolAttribute(MCSA_Global); |
| 1967 | case DK_LAZY_REFERENCE: |
| 1968 | return parseDirectiveSymbolAttribute(MCSA_LazyReference); |
| 1969 | case DK_NO_DEAD_STRIP: |
| 1970 | return parseDirectiveSymbolAttribute(MCSA_NoDeadStrip); |
| 1971 | case DK_SYMBOL_RESOLVER: |
| 1972 | return parseDirectiveSymbolAttribute(MCSA_SymbolResolver); |
| 1973 | case DK_PRIVATE_EXTERN: |
| 1974 | return parseDirectiveSymbolAttribute(MCSA_PrivateExtern); |
| 1975 | case DK_REFERENCE: |
| 1976 | return parseDirectiveSymbolAttribute(MCSA_Reference); |
| 1977 | case DK_WEAK_DEFINITION: |
| 1978 | return parseDirectiveSymbolAttribute(MCSA_WeakDefinition); |
| 1979 | case DK_WEAK_REFERENCE: |
| 1980 | return parseDirectiveSymbolAttribute(MCSA_WeakReference); |
| 1981 | case DK_WEAK_DEF_CAN_BE_HIDDEN: |
| 1982 | return parseDirectiveSymbolAttribute(MCSA_WeakDefAutoPrivate); |
| 1983 | case DK_COMM: |
| 1984 | case DK_COMMON: |
| 1985 | return parseDirectiveComm(/*IsLocal=*/false); |
| 1986 | case DK_LCOMM: |
| 1987 | return parseDirectiveComm(/*IsLocal=*/true); |
| 1988 | case DK_ABORT: |
| 1989 | return parseDirectiveAbort(); |
| 1990 | case DK_INCLUDE: |
| 1991 | return parseDirectiveInclude(); |
| 1992 | case DK_INCBIN: |
| 1993 | return parseDirectiveIncbin(); |
| 1994 | case DK_CODE16: |
| 1995 | case DK_CODE16GCC: |
| 1996 | return TokError(Twine(IDVal) + |
| 1997 | " not currently supported for this target"); |
| 1998 | case DK_REPT: |
| 1999 | return parseDirectiveRept(IDLoc, IDVal); |
| 2000 | case DK_IRP: |
| 2001 | return parseDirectiveIrp(IDLoc); |
| 2002 | case DK_IRPC: |
| 2003 | return parseDirectiveIrpc(IDLoc); |
| 2004 | case DK_ENDR: |
| 2005 | return parseDirectiveEndr(IDLoc); |
| 2006 | case DK_BUNDLE_ALIGN_MODE: |
| 2007 | return parseDirectiveBundleAlignMode(); |
| 2008 | case DK_BUNDLE_LOCK: |
| 2009 | return parseDirectiveBundleLock(); |
| 2010 | case DK_BUNDLE_UNLOCK: |
| 2011 | return parseDirectiveBundleUnlock(); |
| 2012 | case DK_SLEB128: |
| 2013 | return parseDirectiveLEB128(true); |
| 2014 | case DK_ULEB128: |
| 2015 | return parseDirectiveLEB128(false); |
| 2016 | case DK_SPACE: |
| 2017 | case DK_SKIP: |
| 2018 | return parseDirectiveSpace(IDVal); |
| 2019 | case DK_FILE: |
| 2020 | return parseDirectiveFile(IDLoc); |
| 2021 | case DK_LINE: |
| 2022 | return parseDirectiveLine(); |
| 2023 | case DK_LOC: |
| 2024 | return parseDirectiveLoc(); |
| 2025 | case DK_STABS: |
| 2026 | return parseDirectiveStabs(); |
| 2027 | case DK_CV_FILE: |
| 2028 | return parseDirectiveCVFile(); |
| 2029 | case DK_CV_FUNC_ID: |
| 2030 | return parseDirectiveCVFuncId(); |
| 2031 | case DK_CV_INLINE_SITE_ID: |
| 2032 | return parseDirectiveCVInlineSiteId(); |
| 2033 | case DK_CV_LOC: |
| 2034 | return parseDirectiveCVLoc(); |
| 2035 | case DK_CV_LINETABLE: |
| 2036 | return parseDirectiveCVLinetable(); |
| 2037 | case DK_CV_INLINE_LINETABLE: |
| 2038 | return parseDirectiveCVInlineLinetable(); |
| 2039 | case DK_CV_DEF_RANGE: |
| 2040 | return parseDirectiveCVDefRange(); |
| 2041 | case DK_CV_STRING: |
| 2042 | return parseDirectiveCVString(); |
| 2043 | case DK_CV_STRINGTABLE: |
| 2044 | return parseDirectiveCVStringTable(); |
| 2045 | case DK_CV_FILECHECKSUMS: |
| 2046 | return parseDirectiveCVFileChecksums(); |
| 2047 | case DK_CV_FILECHECKSUM_OFFSET: |
| 2048 | return parseDirectiveCVFileChecksumOffset(); |
| 2049 | case DK_CV_FPO_DATA: |
| 2050 | return parseDirectiveCVFPOData(); |
| 2051 | case DK_CFI_SECTIONS: |
| 2052 | return parseDirectiveCFISections(); |
| 2053 | case DK_CFI_STARTPROC: |
| 2054 | return parseDirectiveCFIStartProc(); |
| 2055 | case DK_CFI_ENDPROC: |
| 2056 | return parseDirectiveCFIEndProc(); |
| 2057 | case DK_CFI_DEF_CFA: |
| 2058 | return parseDirectiveCFIDefCfa(IDLoc); |
| 2059 | case DK_CFI_DEF_CFA_OFFSET: |
| 2060 | return parseDirectiveCFIDefCfaOffset(); |
| 2061 | case DK_CFI_ADJUST_CFA_OFFSET: |
| 2062 | return parseDirectiveCFIAdjustCfaOffset(); |
| 2063 | case DK_CFI_DEF_CFA_REGISTER: |
| 2064 | return parseDirectiveCFIDefCfaRegister(IDLoc); |
| 2065 | case DK_CFI_OFFSET: |
| 2066 | return parseDirectiveCFIOffset(IDLoc); |
| 2067 | case DK_CFI_REL_OFFSET: |
| 2068 | return parseDirectiveCFIRelOffset(IDLoc); |
| 2069 | case DK_CFI_PERSONALITY: |
| 2070 | return parseDirectiveCFIPersonalityOrLsda(true); |
| 2071 | case DK_CFI_LSDA: |
| 2072 | return parseDirectiveCFIPersonalityOrLsda(false); |
| 2073 | case DK_CFI_REMEMBER_STATE: |
| 2074 | return parseDirectiveCFIRememberState(); |
| 2075 | case DK_CFI_RESTORE_STATE: |
| 2076 | return parseDirectiveCFIRestoreState(); |
| 2077 | case DK_CFI_SAME_VALUE: |
| 2078 | return parseDirectiveCFISameValue(IDLoc); |
| 2079 | case DK_CFI_RESTORE: |
| 2080 | return parseDirectiveCFIRestore(IDLoc); |
| 2081 | case DK_CFI_ESCAPE: |
| 2082 | return parseDirectiveCFIEscape(); |
| 2083 | case DK_CFI_RETURN_COLUMN: |
| 2084 | return parseDirectiveCFIReturnColumn(IDLoc); |
| 2085 | case DK_CFI_SIGNAL_FRAME: |
| 2086 | return parseDirectiveCFISignalFrame(); |
| 2087 | case DK_CFI_UNDEFINED: |
| 2088 | return parseDirectiveCFIUndefined(IDLoc); |
| 2089 | case DK_CFI_REGISTER: |
| 2090 | return parseDirectiveCFIRegister(IDLoc); |
| 2091 | case DK_CFI_WINDOW_SAVE: |
| 2092 | return parseDirectiveCFIWindowSave(); |
| 2093 | case DK_MACROS_ON: |
| 2094 | case DK_MACROS_OFF: |
| 2095 | return parseDirectiveMacrosOnOff(IDVal); |
| 2096 | case DK_MACRO: |
| 2097 | return parseDirectiveMacro(IDLoc); |
| 2098 | case DK_ALTMACRO: |
| 2099 | case DK_NOALTMACRO: |
| 2100 | return parseDirectiveAltmacro(IDVal); |
| 2101 | case DK_EXITM: |
| 2102 | return parseDirectiveExitMacro(IDVal); |
| 2103 | case DK_ENDM: |
| 2104 | case DK_ENDMACRO: |
| 2105 | return parseDirectiveEndMacro(IDVal); |
| 2106 | case DK_PURGEM: |
| 2107 | return parseDirectivePurgeMacro(IDLoc); |
| 2108 | case DK_END: |
| 2109 | return parseDirectiveEnd(IDLoc); |
| 2110 | case DK_ERR: |
| 2111 | return parseDirectiveError(IDLoc, false); |
| 2112 | case DK_ERROR: |
| 2113 | return parseDirectiveError(IDLoc, true); |
| 2114 | case DK_WARNING: |
| 2115 | return parseDirectiveWarning(IDLoc); |
| 2116 | case DK_RELOC: |
| 2117 | return parseDirectiveReloc(IDLoc); |
| 2118 | case DK_DCB: |
| 2119 | case DK_DCB_W: |
| 2120 | return parseDirectiveDCB(IDVal, 2); |
| 2121 | case DK_DCB_B: |
| 2122 | return parseDirectiveDCB(IDVal, 1); |
| 2123 | case DK_DCB_D: |
| 2124 | return parseDirectiveRealDCB(IDVal, APFloat::IEEEdouble()); |
| 2125 | case DK_DCB_L: |
| 2126 | return parseDirectiveDCB(IDVal, 4); |
| 2127 | case DK_DCB_S: |
| 2128 | return parseDirectiveRealDCB(IDVal, APFloat::IEEEsingle()); |
| 2129 | case DK_DC_X: |
| 2130 | case DK_DCB_X: |
| 2131 | return TokError(Twine(IDVal) + |
| 2132 | " not currently supported for this target"); |
| 2133 | case DK_DS: |
| 2134 | case DK_DS_W: |
| 2135 | return parseDirectiveDS(IDVal, 2); |
| 2136 | case DK_DS_B: |
| 2137 | return parseDirectiveDS(IDVal, 1); |
| 2138 | case DK_DS_D: |
| 2139 | return parseDirectiveDS(IDVal, 8); |
| 2140 | case DK_DS_L: |
| 2141 | case DK_DS_S: |
| 2142 | return parseDirectiveDS(IDVal, 4); |
| 2143 | case DK_DS_P: |
| 2144 | case DK_DS_X: |
| 2145 | return parseDirectiveDS(IDVal, 12); |
| 2146 | case DK_PRINT: |
| 2147 | return parseDirectivePrint(IDLoc); |
| 2148 | case DK_ADDRSIG: |
| 2149 | return parseDirectiveAddrsig(); |
| 2150 | case DK_ADDRSIG_SYM: |
| 2151 | return parseDirectiveAddrsigSym(); |
| 2152 | } |
| 2153 | |
| 2154 | return Error(IDLoc, "unknown directive"); |
| 2155 | } |
| 2156 | |
| 2157 | // __asm _emit or __asm __emit |
| 2158 | if (ParsingInlineAsm && (IDVal == "_emit" || IDVal == "__emit" || |
| 2159 | IDVal == "_EMIT" || IDVal == "__EMIT")) |
| 2160 | return parseDirectiveMSEmit(IDLoc, Info, IDVal.size()); |
| 2161 | |
| 2162 | // __asm align |
| 2163 | if (ParsingInlineAsm && (IDVal == "align" || IDVal == "ALIGN")) |
| 2164 | return parseDirectiveMSAlign(IDLoc, Info); |
| 2165 | |
| 2166 | if (ParsingInlineAsm && (IDVal == "even" || IDVal == "EVEN")) |
| 2167 | Info.AsmRewrites->emplace_back(AOK_EVEN, IDLoc, 4); |
| 2168 | if (checkForValidSection()) |
| 2169 | return true; |
| 2170 | |
| 2171 | // Canonicalize the opcode to lower case. |
| 2172 | std::string OpcodeStr = IDVal.lower(); |
| 2173 | ParseInstructionInfo IInfo(Info.AsmRewrites); |
| 2174 | bool ParseHadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr, ID, |
| 2175 | Info.ParsedOperands); |
| 2176 | Info.ParseError = ParseHadError; |
| 2177 | |
| 2178 | // Dump the parsed representation, if requested. |
| 2179 | if (getShowParsedOperands()) { |
| 2180 | SmallString<256> Str; |
| 2181 | raw_svector_ostream OS(Str); |
| 2182 | OS << "parsed instruction: ["; |
| 2183 | for (unsigned i = 0; i != Info.ParsedOperands.size(); ++i) { |
| 2184 | if (i != 0) |
| 2185 | OS << ", "; |
| 2186 | Info.ParsedOperands[i]->print(OS); |
| 2187 | } |
| 2188 | OS << "]"; |
| 2189 | |
| 2190 | printMessage(IDLoc, SourceMgr::DK_Note, OS.str()); |
| 2191 | } |
| 2192 | |
| 2193 | // Fail even if ParseInstruction erroneously returns false. |
| 2194 | if (hasPendingError() || ParseHadError) |
| 2195 | return true; |
| 2196 | |
| 2197 | // If we are generating dwarf for the current section then generate a .loc |
| 2198 | // directive for the instruction. |
| 2199 | if (!ParseHadError && enabledGenDwarfForAssembly() && |
| 2200 | getContext().getGenDwarfSectionSyms().count( |
| 2201 | getStreamer().getCurrentSectionOnly())) { |
| 2202 | unsigned Line; |
| 2203 | if (ActiveMacros.empty()) |
| 2204 | Line = SrcMgr.FindLineNumber(IDLoc, CurBuffer); |
| 2205 | else |
| 2206 | Line = SrcMgr.FindLineNumber(ActiveMacros.front()->InstantiationLoc, |
| 2207 | ActiveMacros.front()->ExitBuffer); |
| 2208 | |
| 2209 | // If we previously parsed a cpp hash file line comment then make sure the |
| 2210 | // current Dwarf File is for the CppHashFilename if not then emit the |
| 2211 | // Dwarf File table for it and adjust the line number for the .loc. |
| 2212 | if (!CppHashInfo.Filename.empty()) { |
| 2213 | unsigned FileNumber = getStreamer().EmitDwarfFileDirective( |
| 2214 | 0, StringRef(), CppHashInfo.Filename); |
| 2215 | getContext().setGenDwarfFileNumber(FileNumber); |
| 2216 | |
| 2217 | unsigned CppHashLocLineNo = |
| 2218 | SrcMgr.FindLineNumber(CppHashInfo.Loc, CppHashInfo.Buf); |
| 2219 | Line = CppHashInfo.LineNumber - 1 + (Line - CppHashLocLineNo); |
| 2220 | } |
| 2221 | |
| 2222 | getStreamer().EmitDwarfLocDirective( |
| 2223 | getContext().getGenDwarfFileNumber(), Line, 0, |
| 2224 | DWARF2_LINE_DEFAULT_IS_STMT1 ? DWARF2_FLAG_IS_STMT(1 << 0) : 0, 0, 0, |
| 2225 | StringRef()); |
| 2226 | } |
| 2227 | |
| 2228 | // If parsing succeeded, match the instruction. |
| 2229 | if (!ParseHadError) { |
| 2230 | uint64_t ErrorInfo; |
| 2231 | if (getTargetParser().MatchAndEmitInstruction( |
| 2232 | IDLoc, Info.Opcode, Info.ParsedOperands, Out, ErrorInfo, |
| 2233 | getTargetParser().isParsingInlineAsm())) |
| 2234 | return true; |
| 2235 | } |
| 2236 | return false; |
| 2237 | } |
| 2238 | |
| 2239 | // Parse and erase curly braces marking block start/end |
| 2240 | bool |
| 2241 | AsmParser::parseCurlyBlockScope(SmallVectorImpl<AsmRewrite> &AsmStrRewrites) { |
| 2242 | // Identify curly brace marking block start/end |
| 2243 | if (Lexer.isNot(AsmToken::LCurly) && Lexer.isNot(AsmToken::RCurly)) |
| 2244 | return false; |
| 2245 | |
| 2246 | SMLoc StartLoc = Lexer.getLoc(); |
| 2247 | Lex(); // Eat the brace |
| 2248 | if (Lexer.is(AsmToken::EndOfStatement)) |
| 2249 | Lex(); // Eat EndOfStatement following the brace |
| 2250 | |
| 2251 | // Erase the block start/end brace from the output asm string |
| 2252 | AsmStrRewrites.emplace_back(AOK_Skip, StartLoc, Lexer.getLoc().getPointer() - |
| 2253 | StartLoc.getPointer()); |
| 2254 | return true; |
| 2255 | } |
| 2256 | |
| 2257 | /// parseCppHashLineFilenameComment as this: |
| 2258 | /// ::= # number "filename" |
| 2259 | bool AsmParser::parseCppHashLineFilenameComment(SMLoc L) { |
| 2260 | Lex(); // Eat the hash token. |
| 2261 | // Lexer only ever emits HashDirective if it fully formed if it's |
| 2262 | // done the checking already so this is an internal error. |
| 2263 | assert(getTok().is(AsmToken::Integer) &&((getTok().is(AsmToken::Integer) && "Lexing Cpp line comment: Expected Integer" ) ? static_cast<void> (0) : __assert_fail ("getTok().is(AsmToken::Integer) && \"Lexing Cpp line comment: Expected Integer\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 2264, __PRETTY_FUNCTION__)) |
| 2264 | "Lexing Cpp line comment: Expected Integer")((getTok().is(AsmToken::Integer) && "Lexing Cpp line comment: Expected Integer" ) ? static_cast<void> (0) : __assert_fail ("getTok().is(AsmToken::Integer) && \"Lexing Cpp line comment: Expected Integer\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 2264, __PRETTY_FUNCTION__)); |
| 2265 | int64_t LineNumber = getTok().getIntVal(); |
| 2266 | Lex(); |
| 2267 | assert(getTok().is(AsmToken::String) &&((getTok().is(AsmToken::String) && "Lexing Cpp line comment: Expected String" ) ? static_cast<void> (0) : __assert_fail ("getTok().is(AsmToken::String) && \"Lexing Cpp line comment: Expected String\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 2268, __PRETTY_FUNCTION__)) |
| 2268 | "Lexing Cpp line comment: Expected String")((getTok().is(AsmToken::String) && "Lexing Cpp line comment: Expected String" ) ? static_cast<void> (0) : __assert_fail ("getTok().is(AsmToken::String) && \"Lexing Cpp line comment: Expected String\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 2268, __PRETTY_FUNCTION__)); |
| 2269 | StringRef Filename = getTok().getString(); |
| 2270 | Lex(); |
| 2271 | |
| 2272 | // Get rid of the enclosing quotes. |
| 2273 | Filename = Filename.substr(1, Filename.size() - 2); |
| 2274 | |
| 2275 | // Save the SMLoc, Filename and LineNumber for later use by diagnostics. |
| 2276 | CppHashInfo.Loc = L; |
| 2277 | CppHashInfo.Filename = Filename; |
| 2278 | CppHashInfo.LineNumber = LineNumber; |
| 2279 | CppHashInfo.Buf = CurBuffer; |
| 2280 | return false; |
| 2281 | } |
| 2282 | |
| 2283 | /// will use the last parsed cpp hash line filename comment |
| 2284 | /// for the Filename and LineNo if any in the diagnostic. |
| 2285 | void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) { |
| 2286 | const AsmParser *Parser = static_cast<const AsmParser *>(Context); |
| 2287 | raw_ostream &OS = errs(); |
| 2288 | |
| 2289 | const SourceMgr &DiagSrcMgr = *Diag.getSourceMgr(); |
| 2290 | SMLoc DiagLoc = Diag.getLoc(); |
| 2291 | unsigned DiagBuf = DiagSrcMgr.FindBufferContainingLoc(DiagLoc); |
| 2292 | unsigned CppHashBuf = |
| 2293 | Parser->SrcMgr.FindBufferContainingLoc(Parser->CppHashInfo.Loc); |
| 2294 | |
| 2295 | // Like SourceMgr::printMessage() we need to print the include stack if any |
| 2296 | // before printing the message. |
| 2297 | unsigned DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(DiagLoc); |
| 2298 | if (!Parser->SavedDiagHandler && DiagCurBuffer && |
| 2299 | DiagCurBuffer != DiagSrcMgr.getMainFileID()) { |
| 2300 | SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(DiagCurBuffer); |
| 2301 | DiagSrcMgr.PrintIncludeStack(ParentIncludeLoc, OS); |
| 2302 | } |
| 2303 | |
| 2304 | // If we have not parsed a cpp hash line filename comment or the source |
| 2305 | // manager changed or buffer changed (like in a nested include) then just |
| 2306 | // print the normal diagnostic using its Filename and LineNo. |
| 2307 | if (!Parser->CppHashInfo.LineNumber || &DiagSrcMgr != &Parser->SrcMgr || |
| 2308 | DiagBuf != CppHashBuf) { |
| 2309 | if (Parser->SavedDiagHandler) |
| 2310 | Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext); |
| 2311 | else |
| 2312 | Diag.print(nullptr, OS); |
| 2313 | return; |
| 2314 | } |
| 2315 | |
| 2316 | // Use the CppHashFilename and calculate a line number based on the |
| 2317 | // CppHashInfo.Loc and CppHashInfo.LineNumber relative to this Diag's SMLoc |
| 2318 | // for the diagnostic. |
| 2319 | const std::string &Filename = Parser->CppHashInfo.Filename; |
| 2320 | |
| 2321 | int DiagLocLineNo = DiagSrcMgr.FindLineNumber(DiagLoc, DiagBuf); |
| 2322 | int CppHashLocLineNo = |
| 2323 | Parser->SrcMgr.FindLineNumber(Parser->CppHashInfo.Loc, CppHashBuf); |
| 2324 | int LineNo = |
| 2325 | Parser->CppHashInfo.LineNumber - 1 + (DiagLocLineNo - CppHashLocLineNo); |
| 2326 | |
| 2327 | SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(), Filename, LineNo, |
| 2328 | Diag.getColumnNo(), Diag.getKind(), Diag.getMessage(), |
| 2329 | Diag.getLineContents(), Diag.getRanges()); |
| 2330 | |
| 2331 | if (Parser->SavedDiagHandler) |
| 2332 | Parser->SavedDiagHandler(NewDiag, Parser->SavedDiagContext); |
| 2333 | else |
| 2334 | NewDiag.print(nullptr, OS); |
| 2335 | } |
| 2336 | |
| 2337 | // FIXME: This is mostly duplicated from the function in AsmLexer.cpp. The |
| 2338 | // difference being that that function accepts '@' as part of identifiers and |
| 2339 | // we can't do that. AsmLexer.cpp should probably be changed to handle |
| 2340 | // '@' as a special case when needed. |
| 2341 | static bool isIdentifierChar(char c) { |
| 2342 | return isalnum(static_cast<unsigned char>(c)) || c == '_' || c == '$' || |
| 2343 | c == '.'; |
| 2344 | } |
| 2345 | |
| 2346 | bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body, |
| 2347 | ArrayRef<MCAsmMacroParameter> Parameters, |
| 2348 | ArrayRef<MCAsmMacroArgument> A, |
| 2349 | bool EnableAtPseudoVariable, SMLoc L) { |
| 2350 | unsigned NParameters = Parameters.size(); |
| 2351 | bool HasVararg = NParameters ? Parameters.back().Vararg : false; |
| 2352 | if ((!IsDarwin || NParameters != 0) && NParameters != A.size()) |
| 2353 | return Error(L, "Wrong number of arguments"); |
| 2354 | |
| 2355 | // A macro without parameters is handled differently on Darwin: |
| 2356 | // gas accepts no arguments and does no substitutions |
| 2357 | while (!Body.empty()) { |
| 2358 | // Scan for the next substitution. |
| 2359 | std::size_t End = Body.size(), Pos = 0; |
| 2360 | for (; Pos != End; ++Pos) { |
| 2361 | // Check for a substitution or escape. |
| 2362 | if (IsDarwin && !NParameters) { |
| 2363 | // This macro has no parameters, look for $0, $1, etc. |
| 2364 | if (Body[Pos] != '$' || Pos + 1 == End) |
| 2365 | continue; |
| 2366 | |
| 2367 | char Next = Body[Pos + 1]; |
| 2368 | if (Next == '$' || Next == 'n' || |
| 2369 | isdigit(static_cast<unsigned char>(Next))) |
| 2370 | break; |
| 2371 | } else { |
| 2372 | // This macro has parameters, look for \foo, \bar, etc. |
| 2373 | if (Body[Pos] == '\\' && Pos + 1 != End) |
| 2374 | break; |
| 2375 | } |
| 2376 | } |
| 2377 | |
| 2378 | // Add the prefix. |
| 2379 | OS << Body.slice(0, Pos); |
| 2380 | |
| 2381 | // Check if we reached the end. |
| 2382 | if (Pos == End) |
| 2383 | break; |
| 2384 | |
| 2385 | if (IsDarwin && !NParameters) { |
| 2386 | switch (Body[Pos + 1]) { |
| 2387 | // $$ => $ |
| 2388 | case '$': |
| 2389 | OS << '$'; |
| 2390 | break; |
| 2391 | |
| 2392 | // $n => number of arguments |
| 2393 | case 'n': |
| 2394 | OS << A.size(); |
| 2395 | break; |
| 2396 | |
| 2397 | // $[0-9] => argument |
| 2398 | default: { |
| 2399 | // Missing arguments are ignored. |
| 2400 | unsigned Index = Body[Pos + 1] - '0'; |
| 2401 | if (Index >= A.size()) |
| 2402 | break; |
| 2403 | |
| 2404 | // Otherwise substitute with the token values, with spaces eliminated. |
| 2405 | for (const AsmToken &Token : A[Index]) |
| 2406 | OS << Token.getString(); |
| 2407 | break; |
| 2408 | } |
| 2409 | } |
| 2410 | Pos += 2; |
| 2411 | } else { |
| 2412 | unsigned I = Pos + 1; |
| 2413 | |
| 2414 | // Check for the \@ pseudo-variable. |
| 2415 | if (EnableAtPseudoVariable && Body[I] == '@' && I + 1 != End) |
| 2416 | ++I; |
| 2417 | else |
| 2418 | while (isIdentifierChar(Body[I]) && I + 1 != End) |
| 2419 | ++I; |
| 2420 | |
| 2421 | const char *Begin = Body.data() + Pos + 1; |
| 2422 | StringRef Argument(Begin, I - (Pos + 1)); |
| 2423 | unsigned Index = 0; |
| 2424 | |
| 2425 | if (Argument == "@") { |
| 2426 | OS << NumOfMacroInstantiations; |
| 2427 | Pos += 2; |
| 2428 | } else { |
| 2429 | for (; Index < NParameters; ++Index) |
| 2430 | if (Parameters[Index].Name == Argument) |
| 2431 | break; |
| 2432 | |
| 2433 | if (Index == NParameters) { |
| 2434 | if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')') |
| 2435 | Pos += 3; |
| 2436 | else { |
| 2437 | OS << '\\' << Argument; |
| 2438 | Pos = I; |
| 2439 | } |
| 2440 | } else { |
| 2441 | bool VarargParameter = HasVararg && Index == (NParameters - 1); |
| 2442 | for (const AsmToken &Token : A[Index]) |
| 2443 | // For altmacro mode, you can write '%expr'. |
| 2444 | // The prefix '%' evaluates the expression 'expr' |
| 2445 | // and uses the result as a string (e.g. replace %(1+2) with the |
| 2446 | // string "3"). |
| 2447 | // Here, we identify the integer token which is the result of the |
| 2448 | // absolute expression evaluation and replace it with its string |
| 2449 | // representation. |
| 2450 | if (AltMacroMode && Token.getString().front() == '%' && |
| 2451 | Token.is(AsmToken::Integer)) |
| 2452 | // Emit an integer value to the buffer. |
| 2453 | OS << Token.getIntVal(); |
| 2454 | // Only Token that was validated as a string and begins with '<' |
| 2455 | // is considered altMacroString!!! |
| 2456 | else if (AltMacroMode && Token.getString().front() == '<' && |
| 2457 | Token.is(AsmToken::String)) { |
| 2458 | OS << altMacroString(Token.getStringContents()); |
| 2459 | } |
| 2460 | // We expect no quotes around the string's contents when |
| 2461 | // parsing for varargs. |
| 2462 | else if (Token.isNot(AsmToken::String) || VarargParameter) |
| 2463 | OS << Token.getString(); |
| 2464 | else |
| 2465 | OS << Token.getStringContents(); |
| 2466 | |
| 2467 | Pos += 1 + Argument.size(); |
| 2468 | } |
| 2469 | } |
| 2470 | } |
| 2471 | // Update the scan point. |
| 2472 | Body = Body.substr(Pos); |
| 2473 | } |
| 2474 | |
| 2475 | return false; |
| 2476 | } |
| 2477 | |
| 2478 | MacroInstantiation::MacroInstantiation(SMLoc IL, int EB, SMLoc EL, |
| 2479 | size_t CondStackDepth) |
| 2480 | : InstantiationLoc(IL), ExitBuffer(EB), ExitLoc(EL), |
| 2481 | CondStackDepth(CondStackDepth) {} |
| 2482 | |
| 2483 | static bool isOperator(AsmToken::TokenKind kind) { |
| 2484 | switch (kind) { |
| 2485 | default: |
| 2486 | return false; |
| 2487 | case AsmToken::Plus: |
| 2488 | case AsmToken::Minus: |
| 2489 | case AsmToken::Tilde: |
| 2490 | case AsmToken::Slash: |
| 2491 | case AsmToken::Star: |
| 2492 | case AsmToken::Dot: |
| 2493 | case AsmToken::Equal: |
| 2494 | case AsmToken::EqualEqual: |
| 2495 | case AsmToken::Pipe: |
| 2496 | case AsmToken::PipePipe: |
| 2497 | case AsmToken::Caret: |
| 2498 | case AsmToken::Amp: |
| 2499 | case AsmToken::AmpAmp: |
| 2500 | case AsmToken::Exclaim: |
| 2501 | case AsmToken::ExclaimEqual: |
| 2502 | case AsmToken::Less: |
| 2503 | case AsmToken::LessEqual: |
| 2504 | case AsmToken::LessLess: |
| 2505 | case AsmToken::LessGreater: |
| 2506 | case AsmToken::Greater: |
| 2507 | case AsmToken::GreaterEqual: |
| 2508 | case AsmToken::GreaterGreater: |
| 2509 | return true; |
| 2510 | } |
| 2511 | } |
| 2512 | |
| 2513 | namespace { |
| 2514 | |
| 2515 | class AsmLexerSkipSpaceRAII { |
| 2516 | public: |
| 2517 | AsmLexerSkipSpaceRAII(AsmLexer &Lexer, bool SkipSpace) : Lexer(Lexer) { |
| 2518 | Lexer.setSkipSpace(SkipSpace); |
| 2519 | } |
| 2520 | |
| 2521 | ~AsmLexerSkipSpaceRAII() { |
| 2522 | Lexer.setSkipSpace(true); |
| 2523 | } |
| 2524 | |
| 2525 | private: |
| 2526 | AsmLexer &Lexer; |
| 2527 | }; |
| 2528 | |
| 2529 | } // end anonymous namespace |
| 2530 | |
| 2531 | bool AsmParser::parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg) { |
| 2532 | |
| 2533 | if (Vararg) { |
| 2534 | if (Lexer.isNot(AsmToken::EndOfStatement)) { |
| 2535 | StringRef Str = parseStringToEndOfStatement(); |
| 2536 | MA.emplace_back(AsmToken::String, Str); |
| 2537 | } |
| 2538 | return false; |
| 2539 | } |
| 2540 | |
| 2541 | unsigned ParenLevel = 0; |
| 2542 | |
| 2543 | // Darwin doesn't use spaces to delmit arguments. |
| 2544 | AsmLexerSkipSpaceRAII ScopedSkipSpace(Lexer, IsDarwin); |
| 2545 | |
| 2546 | bool SpaceEaten; |
| 2547 | |
| 2548 | while (true) { |
| 2549 | SpaceEaten = false; |
| 2550 | if (Lexer.is(AsmToken::Eof) || Lexer.is(AsmToken::Equal)) |
| 2551 | return TokError("unexpected token in macro instantiation"); |
| 2552 | |
| 2553 | if (ParenLevel == 0) { |
| 2554 | |
| 2555 | if (Lexer.is(AsmToken::Comma)) |
| 2556 | break; |
| 2557 | |
| 2558 | if (Lexer.is(AsmToken::Space)) { |
| 2559 | SpaceEaten = true; |
| 2560 | Lexer.Lex(); // Eat spaces |
| 2561 | } |
| 2562 | |
| 2563 | // Spaces can delimit parameters, but could also be part an expression. |
| 2564 | // If the token after a space is an operator, add the token and the next |
| 2565 | // one into this argument |
| 2566 | if (!IsDarwin) { |
| 2567 | if (isOperator(Lexer.getKind())) { |
| 2568 | MA.push_back(getTok()); |
| 2569 | Lexer.Lex(); |
| 2570 | |
| 2571 | // Whitespace after an operator can be ignored. |
| 2572 | if (Lexer.is(AsmToken::Space)) |
| 2573 | Lexer.Lex(); |
| 2574 | |
| 2575 | continue; |
| 2576 | } |
| 2577 | } |
| 2578 | if (SpaceEaten) |
| 2579 | break; |
| 2580 | } |
| 2581 | |
| 2582 | // handleMacroEntry relies on not advancing the lexer here |
| 2583 | // to be able to fill in the remaining default parameter values |
| 2584 | if (Lexer.is(AsmToken::EndOfStatement)) |
| 2585 | break; |
| 2586 | |
| 2587 | // Adjust the current parentheses level. |
| 2588 | if (Lexer.is(AsmToken::LParen)) |
| 2589 | ++ParenLevel; |
| 2590 | else if (Lexer.is(AsmToken::RParen) && ParenLevel) |
| 2591 | --ParenLevel; |
| 2592 | |
| 2593 | // Append the token to the current argument list. |
| 2594 | MA.push_back(getTok()); |
| 2595 | Lexer.Lex(); |
| 2596 | } |
| 2597 | |
| 2598 | if (ParenLevel != 0) |
| 2599 | return TokError("unbalanced parentheses in macro argument"); |
| 2600 | return false; |
| 2601 | } |
| 2602 | |
| 2603 | // Parse the macro instantiation arguments. |
| 2604 | bool AsmParser::parseMacroArguments(const MCAsmMacro *M, |
| 2605 | MCAsmMacroArguments &A) { |
| 2606 | const unsigned NParameters = M ? M->Parameters.size() : 0; |
| 2607 | bool NamedParametersFound = false; |
| 2608 | SmallVector<SMLoc, 4> FALocs; |
| 2609 | |
| 2610 | A.resize(NParameters); |
| 2611 | FALocs.resize(NParameters); |
| 2612 | |
| 2613 | // Parse two kinds of macro invocations: |
| 2614 | // - macros defined without any parameters accept an arbitrary number of them |
| 2615 | // - macros defined with parameters accept at most that many of them |
| 2616 | bool HasVararg = NParameters ? M->Parameters.back().Vararg : false; |
| 2617 | for (unsigned Parameter = 0; !NParameters || Parameter < NParameters; |
| 2618 | ++Parameter) { |
| 2619 | SMLoc IDLoc = Lexer.getLoc(); |
| 2620 | MCAsmMacroParameter FA; |
| 2621 | |
| 2622 | if (Lexer.is(AsmToken::Identifier) && Lexer.peekTok().is(AsmToken::Equal)) { |
| 2623 | if (parseIdentifier(FA.Name)) |
| 2624 | return Error(IDLoc, "invalid argument identifier for formal argument"); |
| 2625 | |
| 2626 | if (Lexer.isNot(AsmToken::Equal)) |
| 2627 | return TokError("expected '=' after formal parameter identifier"); |
| 2628 | |
| 2629 | Lex(); |
| 2630 | |
| 2631 | NamedParametersFound = true; |
| 2632 | } |
| 2633 | bool Vararg = HasVararg && Parameter == (NParameters - 1); |
| 2634 | |
| 2635 | if (NamedParametersFound && FA.Name.empty()) |
| 2636 | return Error(IDLoc, "cannot mix positional and keyword arguments"); |
| 2637 | |
| 2638 | SMLoc StrLoc = Lexer.getLoc(); |
| 2639 | SMLoc EndLoc; |
| 2640 | if (AltMacroMode && Lexer.is(AsmToken::Percent)) { |
| 2641 | const MCExpr *AbsoluteExp; |
| 2642 | int64_t Value; |
| 2643 | /// Eat '%' |
| 2644 | Lex(); |
| 2645 | if (parseExpression(AbsoluteExp, EndLoc)) |
| 2646 | return false; |
| 2647 | if (!AbsoluteExp->evaluateAsAbsolute(Value, |
| 2648 | getStreamer().getAssemblerPtr())) |
| 2649 | return Error(StrLoc, "expected absolute expression"); |
| 2650 | const char *StrChar = StrLoc.getPointer(); |
| 2651 | const char *EndChar = EndLoc.getPointer(); |
| 2652 | AsmToken newToken(AsmToken::Integer, |
| 2653 | StringRef(StrChar, EndChar - StrChar), Value); |
| 2654 | FA.Value.push_back(newToken); |
| 2655 | } else if (AltMacroMode && Lexer.is(AsmToken::Less) && |
| 2656 | isAltmacroString(StrLoc, EndLoc)) { |
| 2657 | const char *StrChar = StrLoc.getPointer(); |
| 2658 | const char *EndChar = EndLoc.getPointer(); |
| 2659 | jumpToLoc(EndLoc, CurBuffer); |
| 2660 | /// Eat from '<' to '>' |
| 2661 | Lex(); |
| 2662 | AsmToken newToken(AsmToken::String, |
| 2663 | StringRef(StrChar, EndChar - StrChar)); |
| 2664 | FA.Value.push_back(newToken); |
| 2665 | } else if(parseMacroArgument(FA.Value, Vararg)) |
| 2666 | return true; |
| 2667 | |
| 2668 | unsigned PI = Parameter; |
| 2669 | if (!FA.Name.empty()) { |
| 2670 | unsigned FAI = 0; |
| 2671 | for (FAI = 0; FAI < NParameters; ++FAI) |
| 2672 | if (M->Parameters[FAI].Name == FA.Name) |
| 2673 | break; |
| 2674 | |
| 2675 | if (FAI >= NParameters) { |
| 2676 | assert(M && "expected macro to be defined")((M && "expected macro to be defined") ? static_cast< void> (0) : __assert_fail ("M && \"expected macro to be defined\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 2676, __PRETTY_FUNCTION__)); |
| 2677 | return Error(IDLoc, "parameter named '" + FA.Name + |
| 2678 | "' does not exist for macro '" + M->Name + "'"); |
| 2679 | } |
| 2680 | PI = FAI; |
| 2681 | } |
| 2682 | |
| 2683 | if (!FA.Value.empty()) { |
| 2684 | if (A.size() <= PI) |
| 2685 | A.resize(PI + 1); |
| 2686 | A[PI] = FA.Value; |
| 2687 | |
| 2688 | if (FALocs.size() <= PI) |
| 2689 | FALocs.resize(PI + 1); |
| 2690 | |
| 2691 | FALocs[PI] = Lexer.getLoc(); |
| 2692 | } |
| 2693 | |
| 2694 | // At the end of the statement, fill in remaining arguments that have |
| 2695 | // default values. If there aren't any, then the next argument is |
| 2696 | // required but missing |
| 2697 | if (Lexer.is(AsmToken::EndOfStatement)) { |
| 2698 | bool Failure = false; |
| 2699 | for (unsigned FAI = 0; FAI < NParameters; ++FAI) { |
| 2700 | if (A[FAI].empty()) { |
| 2701 | if (M->Parameters[FAI].Required) { |
| 2702 | Error(FALocs[FAI].isValid() ? FALocs[FAI] : Lexer.getLoc(), |
| 2703 | "missing value for required parameter " |
| 2704 | "'" + M->Parameters[FAI].Name + "' in macro '" + M->Name + "'"); |
| 2705 | Failure = true; |
| 2706 | } |
| 2707 | |
| 2708 | if (!M->Parameters[FAI].Value.empty()) |
| 2709 | A[FAI] = M->Parameters[FAI].Value; |
| 2710 | } |
| 2711 | } |
| 2712 | return Failure; |
| 2713 | } |
| 2714 | |
| 2715 | if (Lexer.is(AsmToken::Comma)) |
| 2716 | Lex(); |
| 2717 | } |
| 2718 | |
| 2719 | return TokError("too many positional arguments"); |
| 2720 | } |
| 2721 | |
| 2722 | bool AsmParser::handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc) { |
| 2723 | // Arbitrarily limit macro nesting depth (default matches 'as'). We can |
| 2724 | // eliminate this, although we should protect against infinite loops. |
| 2725 | unsigned MaxNestingDepth = AsmMacroMaxNestingDepth; |
| 2726 | if (ActiveMacros.size() == MaxNestingDepth) { |
| 2727 | std::ostringstream MaxNestingDepthError; |
| 2728 | MaxNestingDepthError << "macros cannot be nested more than " |
| 2729 | << MaxNestingDepth << " levels deep." |
| 2730 | << " Use -asm-macro-max-nesting-depth to increase " |
| 2731 | "this limit."; |
| 2732 | return TokError(MaxNestingDepthError.str()); |
| 2733 | } |
| 2734 | |
| 2735 | MCAsmMacroArguments A; |
| 2736 | if (parseMacroArguments(M, A)) |
| 2737 | return true; |
| 2738 | |
| 2739 | // Macro instantiation is lexical, unfortunately. We construct a new buffer |
| 2740 | // to hold the macro body with substitutions. |
| 2741 | SmallString<256> Buf; |
| 2742 | StringRef Body = M->Body; |
| 2743 | raw_svector_ostream OS(Buf); |
| 2744 | |
| 2745 | if (expandMacro(OS, Body, M->Parameters, A, true, getTok().getLoc())) |
| 2746 | return true; |
| 2747 | |
| 2748 | // We include the .endmacro in the buffer as our cue to exit the macro |
| 2749 | // instantiation. |
| 2750 | OS << ".endmacro\n"; |
| 2751 | |
| 2752 | std::unique_ptr<MemoryBuffer> Instantiation = |
| 2753 | MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>"); |
| 2754 | |
| 2755 | // Create the macro instantiation object and add to the current macro |
| 2756 | // instantiation stack. |
| 2757 | MacroInstantiation *MI = new MacroInstantiation( |
| 2758 | NameLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()); |
| 2759 | ActiveMacros.push_back(MI); |
| 2760 | |
| 2761 | ++NumOfMacroInstantiations; |
| 2762 | |
| 2763 | // Jump to the macro instantiation and prime the lexer. |
| 2764 | CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc()); |
| 2765 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); |
| 2766 | Lex(); |
| 2767 | |
| 2768 | return false; |
| 2769 | } |
| 2770 | |
| 2771 | void AsmParser::handleMacroExit() { |
| 2772 | // Jump to the EndOfStatement we should return to, and consume it. |
| 2773 | jumpToLoc(ActiveMacros.back()->ExitLoc, ActiveMacros.back()->ExitBuffer); |
| 2774 | Lex(); |
| 2775 | |
| 2776 | // Pop the instantiation entry. |
| 2777 | delete ActiveMacros.back(); |
| 2778 | ActiveMacros.pop_back(); |
| 2779 | } |
| 2780 | |
| 2781 | bool AsmParser::parseAssignment(StringRef Name, bool allow_redef, |
| 2782 | bool NoDeadStrip) { |
| 2783 | MCSymbol *Sym; |
| 2784 | const MCExpr *Value; |
| 2785 | if (MCParserUtils::parseAssignmentExpression(Name, allow_redef, *this, Sym, |
| 2786 | Value)) |
| 2787 | return true; |
| 2788 | |
| 2789 | if (!Sym) { |
| 2790 | // In the case where we parse an expression starting with a '.', we will |
| 2791 | // not generate an error, nor will we create a symbol. In this case we |
| 2792 | // should just return out. |
| 2793 | return false; |
| 2794 | } |
| 2795 | |
| 2796 | // Do the assignment. |
| 2797 | Out.EmitAssignment(Sym, Value); |
| 2798 | if (NoDeadStrip) |
| 2799 | Out.EmitSymbolAttribute(Sym, MCSA_NoDeadStrip); |
| 2800 | |
| 2801 | return false; |
| 2802 | } |
| 2803 | |
| 2804 | /// parseIdentifier: |
| 2805 | /// ::= identifier |
| 2806 | /// ::= string |
| 2807 | bool AsmParser::parseIdentifier(StringRef &Res) { |
| 2808 | // The assembler has relaxed rules for accepting identifiers, in particular we |
| 2809 | // allow things like '.globl $foo' and '.def @feat.00', which would normally be |
| 2810 | // separate tokens. At this level, we have already lexed so we cannot (currently) |
| 2811 | // handle this as a context dependent token, instead we detect adjacent tokens |
| 2812 | // and return the combined identifier. |
| 2813 | if (Lexer.is(AsmToken::Dollar) || Lexer.is(AsmToken::At)) { |
| 2814 | SMLoc PrefixLoc = getLexer().getLoc(); |
| 2815 | |
| 2816 | // Consume the prefix character, and check for a following identifier. |
| 2817 | |
| 2818 | AsmToken Buf[1]; |
| 2819 | Lexer.peekTokens(Buf, false); |
| 2820 | |
| 2821 | if (Buf[0].isNot(AsmToken::Identifier)) |
| 2822 | return true; |
| 2823 | |
| 2824 | // We have a '$' or '@' followed by an identifier, make sure they are adjacent. |
| 2825 | if (PrefixLoc.getPointer() + 1 != Buf[0].getLoc().getPointer()) |
| 2826 | return true; |
| 2827 | |
| 2828 | // eat $ or @ |
| 2829 | Lexer.Lex(); // Lexer's Lex guarantees consecutive token. |
| 2830 | // Construct the joined identifier and consume the token. |
| 2831 | Res = |
| 2832 | StringRef(PrefixLoc.getPointer(), getTok().getIdentifier().size() + 1); |
| 2833 | Lex(); // Parser Lex to maintain invariants. |
| 2834 | return false; |
| 2835 | } |
| 2836 | |
| 2837 | if (Lexer.isNot(AsmToken::Identifier) && Lexer.isNot(AsmToken::String)) |
| 2838 | return true; |
| 2839 | |
| 2840 | Res = getTok().getIdentifier(); |
| 2841 | |
| 2842 | Lex(); // Consume the identifier token. |
| 2843 | |
| 2844 | return false; |
| 2845 | } |
| 2846 | |
| 2847 | /// parseDirectiveSet: |
| 2848 | /// ::= .equ identifier ',' expression |
| 2849 | /// ::= .equiv identifier ',' expression |
| 2850 | /// ::= .set identifier ',' expression |
| 2851 | bool AsmParser::parseDirectiveSet(StringRef IDVal, bool allow_redef) { |
| 2852 | StringRef Name; |
| 2853 | if (check(parseIdentifier(Name), "expected identifier") || |
| 2854 | parseToken(AsmToken::Comma) || parseAssignment(Name, allow_redef, true)) |
| 2855 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); |
| 2856 | return false; |
| 2857 | } |
| 2858 | |
| 2859 | bool AsmParser::parseEscapedString(std::string &Data) { |
| 2860 | if (check(getTok().isNot(AsmToken::String), "expected string")) |
| 2861 | return true; |
| 2862 | |
| 2863 | Data = ""; |
| 2864 | StringRef Str = getTok().getStringContents(); |
| 2865 | for (unsigned i = 0, e = Str.size(); i != e; ++i) { |
| 2866 | if (Str[i] != '\\') { |
| 2867 | Data += Str[i]; |
| 2868 | continue; |
| 2869 | } |
| 2870 | |
| 2871 | // Recognize escaped characters. Note that this escape semantics currently |
| 2872 | // loosely follows Darwin 'as'. Notably, it doesn't support hex escapes. |
| 2873 | ++i; |
| 2874 | if (i == e) |
| 2875 | return TokError("unexpected backslash at end of string"); |
| 2876 | |
| 2877 | // Recognize octal sequences. |
| 2878 | if ((unsigned)(Str[i] - '0') <= 7) { |
| 2879 | // Consume up to three octal characters. |
| 2880 | unsigned Value = Str[i] - '0'; |
| 2881 | |
| 2882 | if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) { |
| 2883 | ++i; |
| 2884 | Value = Value * 8 + (Str[i] - '0'); |
| 2885 | |
| 2886 | if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) { |
| 2887 | ++i; |
| 2888 | Value = Value * 8 + (Str[i] - '0'); |
| 2889 | } |
| 2890 | } |
| 2891 | |
| 2892 | if (Value > 255) |
| 2893 | return TokError("invalid octal escape sequence (out of range)"); |
| 2894 | |
| 2895 | Data += (unsigned char)Value; |
| 2896 | continue; |
| 2897 | } |
| 2898 | |
| 2899 | // Otherwise recognize individual escapes. |
| 2900 | switch (Str[i]) { |
| 2901 | default: |
| 2902 | // Just reject invalid escape sequences for now. |
| 2903 | return TokError("invalid escape sequence (unrecognized character)"); |
| 2904 | |
| 2905 | case 'b': Data += '\b'; break; |
| 2906 | case 'f': Data += '\f'; break; |
| 2907 | case 'n': Data += '\n'; break; |
| 2908 | case 'r': Data += '\r'; break; |
| 2909 | case 't': Data += '\t'; break; |
| 2910 | case '"': Data += '"'; break; |
| 2911 | case '\\': Data += '\\'; break; |
| 2912 | } |
| 2913 | } |
| 2914 | |
| 2915 | Lex(); |
| 2916 | return false; |
| 2917 | } |
| 2918 | |
| 2919 | /// parseDirectiveAscii: |
| 2920 | /// ::= ( .ascii | .asciz | .string ) [ "string" ( , "string" )* ] |
| 2921 | bool AsmParser::parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) { |
| 2922 | auto parseOp = [&]() -> bool { |
| 2923 | std::string Data; |
| 2924 | if (checkForValidSection() || parseEscapedString(Data)) |
| 2925 | return true; |
| 2926 | getStreamer().EmitBytes(Data); |
| 2927 | if (ZeroTerminated) |
| 2928 | getStreamer().EmitBytes(StringRef("\0", 1)); |
| 2929 | return false; |
| 2930 | }; |
| 2931 | |
| 2932 | if (parseMany(parseOp)) |
| 2933 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); |
| 2934 | return false; |
| 2935 | } |
| 2936 | |
| 2937 | /// parseDirectiveReloc |
| 2938 | /// ::= .reloc expression , identifier [ , expression ] |
| 2939 | bool AsmParser::parseDirectiveReloc(SMLoc DirectiveLoc) { |
| 2940 | const MCExpr *Offset; |
| 2941 | const MCExpr *Expr = nullptr; |
| 2942 | int64_t OffsetValue; |
| 2943 | SMLoc OffsetLoc = Lexer.getTok().getLoc(); |
| 2944 | |
| 2945 | if (parseExpression(Offset)) |
| 2946 | return true; |
| 2947 | |
| 2948 | if ((Offset->evaluateAsAbsolute(OffsetValue, |
| 2949 | getStreamer().getAssemblerPtr()) && |
| 2950 | check(OffsetValue < 0, OffsetLoc, "expression is negative")) || |
| 2951 | (check(Offset->getKind() != llvm::MCExpr::Constant && |
| 2952 | Offset->getKind() != llvm::MCExpr::SymbolRef, |
| 2953 | OffsetLoc, "expected non-negative number or a label")) || |
| 2954 | (parseToken(AsmToken::Comma, "expected comma") || |
| 2955 | check(getTok().isNot(AsmToken::Identifier), "expected relocation name"))) |
| 2956 | return true; |
| 2957 | |
| 2958 | SMLoc NameLoc = Lexer.getTok().getLoc(); |
| 2959 | StringRef Name = Lexer.getTok().getIdentifier(); |
| 2960 | Lex(); |
| 2961 | |
| 2962 | if (Lexer.is(AsmToken::Comma)) { |
| 2963 | Lex(); |
| 2964 | SMLoc ExprLoc = Lexer.getLoc(); |
| 2965 | if (parseExpression(Expr)) |
| 2966 | return true; |
| 2967 | |
| 2968 | MCValue Value; |
| 2969 | if (!Expr->evaluateAsRelocatable(Value, nullptr, nullptr)) |
| 2970 | return Error(ExprLoc, "expression must be relocatable"); |
| 2971 | } |
| 2972 | |
| 2973 | if (parseToken(AsmToken::EndOfStatement, |
| 2974 | "unexpected token in .reloc directive")) |
| 2975 | return true; |
| 2976 | |
| 2977 | const MCTargetAsmParser &MCT = getTargetParser(); |
| 2978 | const MCSubtargetInfo &STI = MCT.getSTI(); |
| 2979 | if (getStreamer().EmitRelocDirective(*Offset, Name, Expr, DirectiveLoc, STI)) |
| 2980 | return Error(NameLoc, "unknown relocation name"); |
| 2981 | |
| 2982 | return false; |
| 2983 | } |
| 2984 | |
| 2985 | /// parseDirectiveValue |
| 2986 | /// ::= (.byte | .short | ... ) [ expression (, expression)* ] |
| 2987 | bool AsmParser::parseDirectiveValue(StringRef IDVal, unsigned Size) { |
| 2988 | auto parseOp = [&]() -> bool { |
| 2989 | const MCExpr *Value; |
| 2990 | SMLoc ExprLoc = getLexer().getLoc(); |
| 2991 | if (checkForValidSection() || parseExpression(Value)) |
| 2992 | return true; |
| 2993 | // Special case constant expressions to match code generator. |
| 2994 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { |
| 2995 | assert(Size <= 8 && "Invalid size")((Size <= 8 && "Invalid size") ? static_cast<void > (0) : __assert_fail ("Size <= 8 && \"Invalid size\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 2995, __PRETTY_FUNCTION__)); |
| 2996 | uint64_t IntValue = MCE->getValue(); |
| 2997 | if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue)) |
| 2998 | return Error(ExprLoc, "out of range literal value"); |
| 2999 | getStreamer().EmitIntValue(IntValue, Size); |
| 3000 | } else |
| 3001 | getStreamer().EmitValue(Value, Size, ExprLoc); |
| 3002 | return false; |
| 3003 | }; |
| 3004 | |
| 3005 | if (parseMany(parseOp)) |
| 3006 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); |
| 3007 | return false; |
| 3008 | } |
| 3009 | |
| 3010 | static bool parseHexOcta(AsmParser &Asm, uint64_t &hi, uint64_t &lo) { |
| 3011 | if (Asm.getTok().isNot(AsmToken::Integer) && |
| 3012 | Asm.getTok().isNot(AsmToken::BigNum)) |
| 3013 | return Asm.TokError("unknown token in expression"); |
| 3014 | SMLoc ExprLoc = Asm.getTok().getLoc(); |
| 3015 | APInt IntValue = Asm.getTok().getAPIntVal(); |
| 3016 | Asm.Lex(); |
| 3017 | if (!IntValue.isIntN(128)) |
| 3018 | return Asm.Error(ExprLoc, "out of range literal value"); |
| 3019 | if (!IntValue.isIntN(64)) { |
| 3020 | hi = IntValue.getHiBits(IntValue.getBitWidth() - 64).getZExtValue(); |
| 3021 | lo = IntValue.getLoBits(64).getZExtValue(); |
| 3022 | } else { |
| 3023 | hi = 0; |
| 3024 | lo = IntValue.getZExtValue(); |
| 3025 | } |
| 3026 | return false; |
| 3027 | } |
| 3028 | |
| 3029 | /// ParseDirectiveOctaValue |
| 3030 | /// ::= .octa [ hexconstant (, hexconstant)* ] |
| 3031 | |
| 3032 | bool AsmParser::parseDirectiveOctaValue(StringRef IDVal) { |
| 3033 | auto parseOp = [&]() -> bool { |
| 3034 | if (checkForValidSection()) |
| 3035 | return true; |
| 3036 | uint64_t hi, lo; |
| 3037 | if (parseHexOcta(*this, hi, lo)) |
| 3038 | return true; |
| 3039 | if (MAI.isLittleEndian()) { |
| 3040 | getStreamer().EmitIntValue(lo, 8); |
| 3041 | getStreamer().EmitIntValue(hi, 8); |
| 3042 | } else { |
| 3043 | getStreamer().EmitIntValue(hi, 8); |
| 3044 | getStreamer().EmitIntValue(lo, 8); |
| 3045 | } |
| 3046 | return false; |
| 3047 | }; |
| 3048 | |
| 3049 | if (parseMany(parseOp)) |
| 3050 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); |
| 3051 | return false; |
| 3052 | } |
| 3053 | |
| 3054 | bool AsmParser::parseRealValue(const fltSemantics &Semantics, APInt &Res) { |
| 3055 | // We don't truly support arithmetic on floating point expressions, so we |
| 3056 | // have to manually parse unary prefixes. |
| 3057 | bool IsNeg = false; |
| 3058 | if (getLexer().is(AsmToken::Minus)) { |
| 3059 | Lexer.Lex(); |
| 3060 | IsNeg = true; |
| 3061 | } else if (getLexer().is(AsmToken::Plus)) |
| 3062 | Lexer.Lex(); |
| 3063 | |
| 3064 | if (Lexer.is(AsmToken::Error)) |
| 3065 | return TokError(Lexer.getErr()); |
| 3066 | if (Lexer.isNot(AsmToken::Integer) && Lexer.isNot(AsmToken::Real) && |
| 3067 | Lexer.isNot(AsmToken::Identifier)) |
| 3068 | return TokError("unexpected token in directive"); |
| 3069 | |
| 3070 | // Convert to an APFloat. |
| 3071 | APFloat Value(Semantics); |
| 3072 | StringRef IDVal = getTok().getString(); |
| 3073 | if (getLexer().is(AsmToken::Identifier)) { |
| 3074 | if (!IDVal.compare_lower("infinity") || !IDVal.compare_lower("inf")) |
| 3075 | Value = APFloat::getInf(Semantics); |
| 3076 | else if (!IDVal.compare_lower("nan")) |
| 3077 | Value = APFloat::getNaN(Semantics, false, ~0); |
| 3078 | else |
| 3079 | return TokError("invalid floating point literal"); |
| 3080 | } else if (Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven) == |
| 3081 | APFloat::opInvalidOp) |
| 3082 | return TokError("invalid floating point literal"); |
| 3083 | if (IsNeg) |
| 3084 | Value.changeSign(); |
| 3085 | |
| 3086 | // Consume the numeric token. |
| 3087 | Lex(); |
| 3088 | |
| 3089 | Res = Value.bitcastToAPInt(); |
| 3090 | |
| 3091 | return false; |
| 3092 | } |
| 3093 | |
| 3094 | /// parseDirectiveRealValue |
| 3095 | /// ::= (.single | .double) [ expression (, expression)* ] |
| 3096 | bool AsmParser::parseDirectiveRealValue(StringRef IDVal, |
| 3097 | const fltSemantics &Semantics) { |
| 3098 | auto parseOp = [&]() -> bool { |
| 3099 | APInt AsInt; |
| 3100 | if (checkForValidSection() || parseRealValue(Semantics, AsInt)) |
| 3101 | return true; |
| 3102 | getStreamer().EmitIntValue(AsInt.getLimitedValue(), |
| 3103 | AsInt.getBitWidth() / 8); |
| 3104 | return false; |
| 3105 | }; |
| 3106 | |
| 3107 | if (parseMany(parseOp)) |
| 3108 | return addErrorSuffix(" in '" + Twine(IDVal) + "' directive"); |
| 3109 | return false; |
| 3110 | } |
| 3111 | |
| 3112 | /// parseDirectiveZero |
| 3113 | /// ::= .zero expression |
| 3114 | bool AsmParser::parseDirectiveZero() { |
| 3115 | SMLoc NumBytesLoc = Lexer.getLoc(); |
| 3116 | const MCExpr *NumBytes; |
| 3117 | if (checkForValidSection() || parseExpression(NumBytes)) |
| 3118 | return true; |
| 3119 | |
| 3120 | int64_t Val = 0; |
| 3121 | if (getLexer().is(AsmToken::Comma)) { |
| 3122 | Lex(); |
| 3123 | if (parseAbsoluteExpression(Val)) |
| 3124 | return true; |
| 3125 | } |
| 3126 | |
| 3127 | if (parseToken(AsmToken::EndOfStatement, |
| 3128 | "unexpected token in '.zero' directive")) |
| 3129 | return true; |
| 3130 | getStreamer().emitFill(*NumBytes, Val, NumBytesLoc); |
| 3131 | |
| 3132 | return false; |
| 3133 | } |
| 3134 | |
| 3135 | /// parseDirectiveFill |
| 3136 | /// ::= .fill expression [ , expression [ , expression ] ] |
| 3137 | bool AsmParser::parseDirectiveFill() { |
| 3138 | SMLoc NumValuesLoc = Lexer.getLoc(); |
| 3139 | const MCExpr *NumValues; |
| 3140 | if (checkForValidSection() || parseExpression(NumValues)) |
| 3141 | return true; |
| 3142 | |
| 3143 | int64_t FillSize = 1; |
| 3144 | int64_t FillExpr = 0; |
| 3145 | |
| 3146 | SMLoc SizeLoc, ExprLoc; |
| 3147 | |
| 3148 | if (parseOptionalToken(AsmToken::Comma)) { |
| 3149 | SizeLoc = getTok().getLoc(); |
| 3150 | if (parseAbsoluteExpression(FillSize)) |
| 3151 | return true; |
| 3152 | if (parseOptionalToken(AsmToken::Comma)) { |
| 3153 | ExprLoc = getTok().getLoc(); |
| 3154 | if (parseAbsoluteExpression(FillExpr)) |
| 3155 | return true; |
| 3156 | } |
| 3157 | } |
| 3158 | if (parseToken(AsmToken::EndOfStatement, |
| 3159 | "unexpected token in '.fill' directive")) |
| 3160 | return true; |
| 3161 | |
| 3162 | if (FillSize < 0) { |
| 3163 | Warning(SizeLoc, "'.fill' directive with negative size has no effect"); |
| 3164 | return false; |
| 3165 | } |
| 3166 | if (FillSize > 8) { |
| 3167 | Warning(SizeLoc, "'.fill' directive with size greater than 8 has been truncated to 8"); |
| 3168 | FillSize = 8; |
| 3169 | } |
| 3170 | |
| 3171 | if (!isUInt<32>(FillExpr) && FillSize > 4) |
| 3172 | Warning(ExprLoc, "'.fill' directive pattern has been truncated to 32-bits"); |
| 3173 | |
| 3174 | getStreamer().emitFill(*NumValues, FillSize, FillExpr, NumValuesLoc); |
| 3175 | |
| 3176 | return false; |
| 3177 | } |
| 3178 | |
| 3179 | /// parseDirectiveOrg |
| 3180 | /// ::= .org expression [ , expression ] |
| 3181 | bool AsmParser::parseDirectiveOrg() { |
| 3182 | const MCExpr *Offset; |
| 3183 | SMLoc OffsetLoc = Lexer.getLoc(); |
| 3184 | if (checkForValidSection() || parseExpression(Offset)) |
| 3185 | return true; |
| 3186 | |
| 3187 | // Parse optional fill expression. |
| 3188 | int64_t FillExpr = 0; |
| 3189 | if (parseOptionalToken(AsmToken::Comma)) |
| 3190 | if (parseAbsoluteExpression(FillExpr)) |
| 3191 | return addErrorSuffix(" in '.org' directive"); |
| 3192 | if (parseToken(AsmToken::EndOfStatement)) |
| 3193 | return addErrorSuffix(" in '.org' directive"); |
| 3194 | |
| 3195 | getStreamer().emitValueToOffset(Offset, FillExpr, OffsetLoc); |
| 3196 | return false; |
| 3197 | } |
| 3198 | |
| 3199 | /// parseDirectiveAlign |
| 3200 | /// ::= {.align, ...} expression [ , expression [ , expression ]] |
| 3201 | bool AsmParser::parseDirectiveAlign(bool IsPow2, unsigned ValueSize) { |
| 3202 | SMLoc AlignmentLoc = getLexer().getLoc(); |
| 3203 | int64_t Alignment; |
| 3204 | SMLoc MaxBytesLoc; |
| 3205 | bool HasFillExpr = false; |
| 3206 | int64_t FillExpr = 0; |
| 3207 | int64_t MaxBytesToFill = 0; |
| 3208 | |
| 3209 | auto parseAlign = [&]() -> bool { |
| 3210 | if (parseAbsoluteExpression(Alignment)) |
| 3211 | return true; |
| 3212 | if (parseOptionalToken(AsmToken::Comma)) { |
| 3213 | // The fill expression can be omitted while specifying a maximum number of |
| 3214 | // alignment bytes, e.g: |
| 3215 | // .align 3,,4 |
| 3216 | if (getTok().isNot(AsmToken::Comma)) { |
| 3217 | HasFillExpr = true; |
| 3218 | if (parseAbsoluteExpression(FillExpr)) |
| 3219 | return true; |
| 3220 | } |
| 3221 | if (parseOptionalToken(AsmToken::Comma)) |
| 3222 | if (parseTokenLoc(MaxBytesLoc) || |
| 3223 | parseAbsoluteExpression(MaxBytesToFill)) |
| 3224 | return true; |
| 3225 | } |
| 3226 | return parseToken(AsmToken::EndOfStatement); |
| 3227 | }; |
| 3228 | |
| 3229 | if (checkForValidSection()) |
| 3230 | return addErrorSuffix(" in directive"); |
| 3231 | // Ignore empty '.p2align' directives for GNU-as compatibility |
| 3232 | if (IsPow2 && (ValueSize == 1) && getTok().is(AsmToken::EndOfStatement)) { |
| 3233 | Warning(AlignmentLoc, "p2align directive with no operand(s) is ignored"); |
| 3234 | return parseToken(AsmToken::EndOfStatement); |
| 3235 | } |
| 3236 | if (parseAlign()) |
| 3237 | return addErrorSuffix(" in directive"); |
| 3238 | |
| 3239 | // Always emit an alignment here even if we thrown an error. |
| 3240 | bool ReturnVal = false; |
| 3241 | |
| 3242 | // Compute alignment in bytes. |
| 3243 | if (IsPow2) { |
| 3244 | // FIXME: Diagnose overflow. |
| 3245 | if (Alignment >= 32) { |
| 3246 | ReturnVal |= Error(AlignmentLoc, "invalid alignment value"); |
| 3247 | Alignment = 31; |
| 3248 | } |
| 3249 | |
| 3250 | Alignment = 1ULL << Alignment; |
| 3251 | } else { |
| 3252 | // Reject alignments that aren't either a power of two or zero, |
| 3253 | // for gas compatibility. Alignment of zero is silently rounded |
| 3254 | // up to one. |
| 3255 | if (Alignment == 0) |
| 3256 | Alignment = 1; |
| 3257 | if (!isPowerOf2_64(Alignment)) |
| 3258 | ReturnVal |= Error(AlignmentLoc, "alignment must be a power of 2"); |
| 3259 | } |
| 3260 | |
| 3261 | // Diagnose non-sensical max bytes to align. |
| 3262 | if (MaxBytesLoc.isValid()) { |
| 3263 | if (MaxBytesToFill < 1) { |
| 3264 | ReturnVal |= Error(MaxBytesLoc, |
| 3265 | "alignment directive can never be satisfied in this " |
| 3266 | "many bytes, ignoring maximum bytes expression"); |
| 3267 | MaxBytesToFill = 0; |
| 3268 | } |
| 3269 | |
| 3270 | if (MaxBytesToFill >= Alignment) { |
| 3271 | Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and " |
| 3272 | "has no effect"); |
| 3273 | MaxBytesToFill = 0; |
| 3274 | } |
| 3275 | } |
| 3276 | |
| 3277 | // Check whether we should use optimal code alignment for this .align |
| 3278 | // directive. |
| 3279 | const MCSection *Section = getStreamer().getCurrentSectionOnly(); |
| 3280 | assert(Section && "must have section to emit alignment")((Section && "must have section to emit alignment") ? static_cast<void> (0) : __assert_fail ("Section && \"must have section to emit alignment\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 3280, __PRETTY_FUNCTION__)); |
| 3281 | bool UseCodeAlign = Section->UseCodeAlign(); |
| 3282 | if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) && |
| 3283 | ValueSize == 1 && UseCodeAlign) { |
| 3284 | getStreamer().EmitCodeAlignment(Alignment, MaxBytesToFill); |
| 3285 | } else { |
| 3286 | // FIXME: Target specific behavior about how the "extra" bytes are filled. |
| 3287 | getStreamer().EmitValueToAlignment(Alignment, FillExpr, ValueSize, |
| 3288 | MaxBytesToFill); |
| 3289 | } |
| 3290 | |
| 3291 | return ReturnVal; |
| 3292 | } |
| 3293 | |
| 3294 | /// parseDirectiveFile |
| 3295 | /// ::= .file filename |
| 3296 | /// ::= .file number [directory] filename [md5 checksum] [source source-text] |
| 3297 | bool AsmParser::parseDirectiveFile(SMLoc DirectiveLoc) { |
| 3298 | // FIXME: I'm not sure what this is. |
| 3299 | int64_t FileNumber = -1; |
| 3300 | if (getLexer().is(AsmToken::Integer)) { |
| 3301 | FileNumber = getTok().getIntVal(); |
| 3302 | Lex(); |
| 3303 | |
| 3304 | if (FileNumber < 0) |
| 3305 | return TokError("negative file number"); |
| 3306 | } |
| 3307 | |
| 3308 | std::string Path; |
| 3309 | |
| 3310 | // Usually the directory and filename together, otherwise just the directory. |
| 3311 | // Allow the strings to have escaped octal character sequence. |
| 3312 | if (check(getTok().isNot(AsmToken::String), |
| 3313 | "unexpected token in '.file' directive") || |
| 3314 | parseEscapedString(Path)) |
| 3315 | return true; |
| 3316 | |
| 3317 | StringRef Directory; |
| 3318 | StringRef Filename; |
| 3319 | std::string FilenameData; |
| 3320 | if (getLexer().is(AsmToken::String)) { |
| 3321 | if (check(FileNumber == -1, |
| 3322 | "explicit path specified, but no file number") || |
| 3323 | parseEscapedString(FilenameData)) |
| 3324 | return true; |
| 3325 | Filename = FilenameData; |
| 3326 | Directory = Path; |
| 3327 | } else { |
| 3328 | Filename = Path; |
| 3329 | } |
| 3330 | |
| 3331 | uint64_t MD5Hi, MD5Lo; |
| 3332 | bool HasMD5 = false; |
| 3333 | |
| 3334 | Optional<StringRef> Source; |
| 3335 | bool HasSource = false; |
| 3336 | std::string SourceString; |
| 3337 | |
| 3338 | while (!parseOptionalToken(AsmToken::EndOfStatement)) { |
| 3339 | StringRef Keyword; |
| 3340 | if (check(getTok().isNot(AsmToken::Identifier), |
| 3341 | "unexpected token in '.file' directive") || |
| 3342 | parseIdentifier(Keyword)) |
| 3343 | return true; |
| 3344 | if (Keyword == "md5") { |
| 3345 | HasMD5 = true; |
| 3346 | if (check(FileNumber == -1, |
| 3347 | "MD5 checksum specified, but no file number") || |
| 3348 | parseHexOcta(*this, MD5Hi, MD5Lo)) |
| 3349 | return true; |
| 3350 | } else if (Keyword == "source") { |
| 3351 | HasSource = true; |
| 3352 | if (check(FileNumber == -1, |
| 3353 | "source specified, but no file number") || |
| 3354 | check(getTok().isNot(AsmToken::String), |
| 3355 | "unexpected token in '.file' directive") || |
| 3356 | parseEscapedString(SourceString)) |
| 3357 | return true; |
| 3358 | } else { |
| 3359 | return TokError("unexpected token in '.file' directive"); |
| 3360 | } |
| 3361 | } |
| 3362 | |
| 3363 | if (FileNumber == -1) { |
| 3364 | if (!getContext().getAsmInfo()->hasSingleParameterDotFile()) |
| 3365 | return Error(DirectiveLoc, |
| 3366 | "target does not support '.file' without a number"); |
| 3367 | getStreamer().EmitFileDirective(Filename); |
| 3368 | } else { |
| 3369 | // In case there is a -g option as well as debug info from directive .file, |
| 3370 | // we turn off the -g option, directly use the existing debug info instead. |
| 3371 | // Also reset any implicit ".file 0" for the assembler source. |
| 3372 | if (Ctx.getGenDwarfForAssembly()) { |
| 3373 | Ctx.getMCDwarfLineTable(0).resetRootFile(); |
| 3374 | Ctx.setGenDwarfForAssembly(false); |
| 3375 | } |
| 3376 | |
| 3377 | MD5::MD5Result *CKMem = nullptr; |
| 3378 | if (HasMD5) { |
| 3379 | CKMem = (MD5::MD5Result *)Ctx.allocate(sizeof(MD5::MD5Result), 1); |
| 3380 | for (unsigned i = 0; i != 8; ++i) { |
| 3381 | CKMem->Bytes[i] = uint8_t(MD5Hi >> ((7 - i) * 8)); |
| 3382 | CKMem->Bytes[i + 8] = uint8_t(MD5Lo >> ((7 - i) * 8)); |
| 3383 | } |
| 3384 | } |
| 3385 | if (HasSource) { |
| 3386 | char *SourceBuf = static_cast<char *>(Ctx.allocate(SourceString.size())); |
| 3387 | memcpy(SourceBuf, SourceString.data(), SourceString.size()); |
| 3388 | Source = StringRef(SourceBuf, SourceString.size()); |
| 3389 | } |
| 3390 | if (FileNumber == 0) { |
| 3391 | if (Ctx.getDwarfVersion() < 5) |
| 3392 | return Warning(DirectiveLoc, "file 0 not supported prior to DWARF-5"); |
| 3393 | getStreamer().emitDwarfFile0Directive(Directory, Filename, CKMem, Source); |
| 3394 | } else { |
| 3395 | Expected<unsigned> FileNumOrErr = getStreamer().tryEmitDwarfFileDirective( |
| 3396 | FileNumber, Directory, Filename, CKMem, Source); |
| 3397 | if (!FileNumOrErr) |
| 3398 | return Error(DirectiveLoc, toString(FileNumOrErr.takeError())); |
| 3399 | FileNumber = FileNumOrErr.get(); |
Value stored to 'FileNumber' is never read | |
| 3400 | } |
| 3401 | // Alert the user if there are some .file directives with MD5 and some not. |
| 3402 | // But only do that once. |
| 3403 | if (!ReportedInconsistentMD5 && !Ctx.isDwarfMD5UsageConsistent(0)) { |
| 3404 | ReportedInconsistentMD5 = true; |
| 3405 | return Warning(DirectiveLoc, "inconsistent use of MD5 checksums"); |
| 3406 | } |
| 3407 | } |
| 3408 | |
| 3409 | return false; |
| 3410 | } |
| 3411 | |
| 3412 | /// parseDirectiveLine |
| 3413 | /// ::= .line [number] |
| 3414 | bool AsmParser::parseDirectiveLine() { |
| 3415 | int64_t LineNumber; |
| 3416 | if (getLexer().is(AsmToken::Integer)) { |
| 3417 | if (parseIntToken(LineNumber, "unexpected token in '.line' directive")) |
| 3418 | return true; |
| 3419 | (void)LineNumber; |
| 3420 | // FIXME: Do something with the .line. |
| 3421 | } |
| 3422 | if (parseToken(AsmToken::EndOfStatement, |
| 3423 | "unexpected token in '.line' directive")) |
| 3424 | return true; |
| 3425 | |
| 3426 | return false; |
| 3427 | } |
| 3428 | |
| 3429 | /// parseDirectiveLoc |
| 3430 | /// ::= .loc FileNumber [LineNumber] [ColumnPos] [basic_block] [prologue_end] |
| 3431 | /// [epilogue_begin] [is_stmt VALUE] [isa VALUE] |
| 3432 | /// The first number is a file number, must have been previously assigned with |
| 3433 | /// a .file directive, the second number is the line number and optionally the |
| 3434 | /// third number is a column position (zero if not specified). The remaining |
| 3435 | /// optional items are .loc sub-directives. |
| 3436 | bool AsmParser::parseDirectiveLoc() { |
| 3437 | int64_t FileNumber = 0, LineNumber = 0; |
| 3438 | SMLoc Loc = getTok().getLoc(); |
| 3439 | if (parseIntToken(FileNumber, "unexpected token in '.loc' directive") || |
| 3440 | check(FileNumber < 1 && Ctx.getDwarfVersion() < 5, Loc, |
| 3441 | "file number less than one in '.loc' directive") || |
| 3442 | check(!getContext().isValidDwarfFileNumber(FileNumber), Loc, |
| 3443 | "unassigned file number in '.loc' directive")) |
| 3444 | return true; |
| 3445 | |
| 3446 | // optional |
| 3447 | if (getLexer().is(AsmToken::Integer)) { |
| 3448 | LineNumber = getTok().getIntVal(); |
| 3449 | if (LineNumber < 0) |
| 3450 | return TokError("line number less than zero in '.loc' directive"); |
| 3451 | Lex(); |
| 3452 | } |
| 3453 | |
| 3454 | int64_t ColumnPos = 0; |
| 3455 | if (getLexer().is(AsmToken::Integer)) { |
| 3456 | ColumnPos = getTok().getIntVal(); |
| 3457 | if (ColumnPos < 0) |
| 3458 | return TokError("column position less than zero in '.loc' directive"); |
| 3459 | Lex(); |
| 3460 | } |
| 3461 | |
| 3462 | unsigned Flags = DWARF2_LINE_DEFAULT_IS_STMT1 ? DWARF2_FLAG_IS_STMT(1 << 0) : 0; |
| 3463 | unsigned Isa = 0; |
| 3464 | int64_t Discriminator = 0; |
| 3465 | |
| 3466 | auto parseLocOp = [&]() -> bool { |
| 3467 | StringRef Name; |
| 3468 | SMLoc Loc = getTok().getLoc(); |
| 3469 | if (parseIdentifier(Name)) |
| 3470 | return TokError("unexpected token in '.loc' directive"); |
| 3471 | |
| 3472 | if (Name == "basic_block") |
| 3473 | Flags |= DWARF2_FLAG_BASIC_BLOCK(1 << 1); |
| 3474 | else if (Name == "prologue_end") |
| 3475 | Flags |= DWARF2_FLAG_PROLOGUE_END(1 << 2); |
| 3476 | else if (Name == "epilogue_begin") |
| 3477 | Flags |= DWARF2_FLAG_EPILOGUE_BEGIN(1 << 3); |
| 3478 | else if (Name == "is_stmt") { |
| 3479 | Loc = getTok().getLoc(); |
| 3480 | const MCExpr *Value; |
| 3481 | if (parseExpression(Value)) |
| 3482 | return true; |
| 3483 | // The expression must be the constant 0 or 1. |
| 3484 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { |
| 3485 | int Value = MCE->getValue(); |
| 3486 | if (Value == 0) |
| 3487 | Flags &= ~DWARF2_FLAG_IS_STMT(1 << 0); |
| 3488 | else if (Value == 1) |
| 3489 | Flags |= DWARF2_FLAG_IS_STMT(1 << 0); |
| 3490 | else |
| 3491 | return Error(Loc, "is_stmt value not 0 or 1"); |
| 3492 | } else { |
| 3493 | return Error(Loc, "is_stmt value not the constant value of 0 or 1"); |
| 3494 | } |
| 3495 | } else if (Name == "isa") { |
| 3496 | Loc = getTok().getLoc(); |
| 3497 | const MCExpr *Value; |
| 3498 | if (parseExpression(Value)) |
| 3499 | return true; |
| 3500 | // The expression must be a constant greater or equal to 0. |
| 3501 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { |
| 3502 | int Value = MCE->getValue(); |
| 3503 | if (Value < 0) |
| 3504 | return Error(Loc, "isa number less than zero"); |
| 3505 | Isa = Value; |
| 3506 | } else { |
| 3507 | return Error(Loc, "isa number not a constant value"); |
| 3508 | } |
| 3509 | } else if (Name == "discriminator") { |
| 3510 | if (parseAbsoluteExpression(Discriminator)) |
| 3511 | return true; |
| 3512 | } else { |
| 3513 | return Error(Loc, "unknown sub-directive in '.loc' directive"); |
| 3514 | } |
| 3515 | return false; |
| 3516 | }; |
| 3517 | |
| 3518 | if (parseMany(parseLocOp, false /*hasComma*/)) |
| 3519 | return true; |
| 3520 | |
| 3521 | getStreamer().EmitDwarfLocDirective(FileNumber, LineNumber, ColumnPos, Flags, |
| 3522 | Isa, Discriminator, StringRef()); |
| 3523 | |
| 3524 | return false; |
| 3525 | } |
| 3526 | |
| 3527 | /// parseDirectiveStabs |
| 3528 | /// ::= .stabs string, number, number, number |
| 3529 | bool AsmParser::parseDirectiveStabs() { |
| 3530 | return TokError("unsupported directive '.stabs'"); |
| 3531 | } |
| 3532 | |
| 3533 | /// parseDirectiveCVFile |
| 3534 | /// ::= .cv_file number filename [checksum] [checksumkind] |
| 3535 | bool AsmParser::parseDirectiveCVFile() { |
| 3536 | SMLoc FileNumberLoc = getTok().getLoc(); |
| 3537 | int64_t FileNumber; |
| 3538 | std::string Filename; |
| 3539 | std::string Checksum; |
| 3540 | int64_t ChecksumKind = 0; |
| 3541 | |
| 3542 | if (parseIntToken(FileNumber, |
| 3543 | "expected file number in '.cv_file' directive") || |
| 3544 | check(FileNumber < 1, FileNumberLoc, "file number less than one") || |
| 3545 | check(getTok().isNot(AsmToken::String), |
| 3546 | "unexpected token in '.cv_file' directive") || |
| 3547 | parseEscapedString(Filename)) |
| 3548 | return true; |
| 3549 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { |
| 3550 | if (check(getTok().isNot(AsmToken::String), |
| 3551 | "unexpected token in '.cv_file' directive") || |
| 3552 | parseEscapedString(Checksum) || |
| 3553 | parseIntToken(ChecksumKind, |
| 3554 | "expected checksum kind in '.cv_file' directive") || |
| 3555 | parseToken(AsmToken::EndOfStatement, |
| 3556 | "unexpected token in '.cv_file' directive")) |
| 3557 | return true; |
| 3558 | } |
| 3559 | |
| 3560 | Checksum = fromHex(Checksum); |
| 3561 | void *CKMem = Ctx.allocate(Checksum.size(), 1); |
| 3562 | memcpy(CKMem, Checksum.data(), Checksum.size()); |
| 3563 | ArrayRef<uint8_t> ChecksumAsBytes(reinterpret_cast<const uint8_t *>(CKMem), |
| 3564 | Checksum.size()); |
| 3565 | |
| 3566 | if (!getStreamer().EmitCVFileDirective(FileNumber, Filename, ChecksumAsBytes, |
| 3567 | static_cast<uint8_t>(ChecksumKind))) |
| 3568 | return Error(FileNumberLoc, "file number already allocated"); |
| 3569 | |
| 3570 | return false; |
| 3571 | } |
| 3572 | |
| 3573 | bool AsmParser::parseCVFunctionId(int64_t &FunctionId, |
| 3574 | StringRef DirectiveName) { |
| 3575 | SMLoc Loc; |
| 3576 | return parseTokenLoc(Loc) || |
| 3577 | parseIntToken(FunctionId, "expected function id in '" + DirectiveName + |
| 3578 | "' directive") || |
| 3579 | check(FunctionId < 0 || FunctionId >= UINT_MAX(2147483647 *2U +1U), Loc, |
| 3580 | "expected function id within range [0, UINT_MAX)"); |
| 3581 | } |
| 3582 | |
| 3583 | bool AsmParser::parseCVFileId(int64_t &FileNumber, StringRef DirectiveName) { |
| 3584 | SMLoc Loc; |
| 3585 | return parseTokenLoc(Loc) || |
| 3586 | parseIntToken(FileNumber, "expected integer in '" + DirectiveName + |
| 3587 | "' directive") || |
| 3588 | check(FileNumber < 1, Loc, "file number less than one in '" + |
| 3589 | DirectiveName + "' directive") || |
| 3590 | check(!getCVContext().isValidFileNumber(FileNumber), Loc, |
| 3591 | "unassigned file number in '" + DirectiveName + "' directive"); |
| 3592 | } |
| 3593 | |
| 3594 | /// parseDirectiveCVFuncId |
| 3595 | /// ::= .cv_func_id FunctionId |
| 3596 | /// |
| 3597 | /// Introduces a function ID that can be used with .cv_loc. |
| 3598 | bool AsmParser::parseDirectiveCVFuncId() { |
| 3599 | SMLoc FunctionIdLoc = getTok().getLoc(); |
| 3600 | int64_t FunctionId; |
| 3601 | |
| 3602 | if (parseCVFunctionId(FunctionId, ".cv_func_id") || |
| 3603 | parseToken(AsmToken::EndOfStatement, |
| 3604 | "unexpected token in '.cv_func_id' directive")) |
| 3605 | return true; |
| 3606 | |
| 3607 | if (!getStreamer().EmitCVFuncIdDirective(FunctionId)) |
| 3608 | return Error(FunctionIdLoc, "function id already allocated"); |
| 3609 | |
| 3610 | return false; |
| 3611 | } |
| 3612 | |
| 3613 | /// parseDirectiveCVInlineSiteId |
| 3614 | /// ::= .cv_inline_site_id FunctionId |
| 3615 | /// "within" IAFunc |
| 3616 | /// "inlined_at" IAFile IALine [IACol] |
| 3617 | /// |
| 3618 | /// Introduces a function ID that can be used with .cv_loc. Includes "inlined |
| 3619 | /// at" source location information for use in the line table of the caller, |
| 3620 | /// whether the caller is a real function or another inlined call site. |
| 3621 | bool AsmParser::parseDirectiveCVInlineSiteId() { |
| 3622 | SMLoc FunctionIdLoc = getTok().getLoc(); |
| 3623 | int64_t FunctionId; |
| 3624 | int64_t IAFunc; |
| 3625 | int64_t IAFile; |
| 3626 | int64_t IALine; |
| 3627 | int64_t IACol = 0; |
| 3628 | |
| 3629 | // FunctionId |
| 3630 | if (parseCVFunctionId(FunctionId, ".cv_inline_site_id")) |
| 3631 | return true; |
| 3632 | |
| 3633 | // "within" |
| 3634 | if (check((getLexer().isNot(AsmToken::Identifier) || |
| 3635 | getTok().getIdentifier() != "within"), |
| 3636 | "expected 'within' identifier in '.cv_inline_site_id' directive")) |
| 3637 | return true; |
| 3638 | Lex(); |
| 3639 | |
| 3640 | // IAFunc |
| 3641 | if (parseCVFunctionId(IAFunc, ".cv_inline_site_id")) |
| 3642 | return true; |
| 3643 | |
| 3644 | // "inlined_at" |
| 3645 | if (check((getLexer().isNot(AsmToken::Identifier) || |
| 3646 | getTok().getIdentifier() != "inlined_at"), |
| 3647 | "expected 'inlined_at' identifier in '.cv_inline_site_id' " |
| 3648 | "directive") ) |
| 3649 | return true; |
| 3650 | Lex(); |
| 3651 | |
| 3652 | // IAFile IALine |
| 3653 | if (parseCVFileId(IAFile, ".cv_inline_site_id") || |
| 3654 | parseIntToken(IALine, "expected line number after 'inlined_at'")) |
| 3655 | return true; |
| 3656 | |
| 3657 | // [IACol] |
| 3658 | if (getLexer().is(AsmToken::Integer)) { |
| 3659 | IACol = getTok().getIntVal(); |
| 3660 | Lex(); |
| 3661 | } |
| 3662 | |
| 3663 | if (parseToken(AsmToken::EndOfStatement, |
| 3664 | "unexpected token in '.cv_inline_site_id' directive")) |
| 3665 | return true; |
| 3666 | |
| 3667 | if (!getStreamer().EmitCVInlineSiteIdDirective(FunctionId, IAFunc, IAFile, |
| 3668 | IALine, IACol, FunctionIdLoc)) |
| 3669 | return Error(FunctionIdLoc, "function id already allocated"); |
| 3670 | |
| 3671 | return false; |
| 3672 | } |
| 3673 | |
| 3674 | /// parseDirectiveCVLoc |
| 3675 | /// ::= .cv_loc FunctionId FileNumber [LineNumber] [ColumnPos] [prologue_end] |
| 3676 | /// [is_stmt VALUE] |
| 3677 | /// The first number is a file number, must have been previously assigned with |
| 3678 | /// a .file directive, the second number is the line number and optionally the |
| 3679 | /// third number is a column position (zero if not specified). The remaining |
| 3680 | /// optional items are .loc sub-directives. |
| 3681 | bool AsmParser::parseDirectiveCVLoc() { |
| 3682 | SMLoc DirectiveLoc = getTok().getLoc(); |
| 3683 | int64_t FunctionId, FileNumber; |
| 3684 | if (parseCVFunctionId(FunctionId, ".cv_loc") || |
| 3685 | parseCVFileId(FileNumber, ".cv_loc")) |
| 3686 | return true; |
| 3687 | |
| 3688 | int64_t LineNumber = 0; |
| 3689 | if (getLexer().is(AsmToken::Integer)) { |
| 3690 | LineNumber = getTok().getIntVal(); |
| 3691 | if (LineNumber < 0) |
| 3692 | return TokError("line number less than zero in '.cv_loc' directive"); |
| 3693 | Lex(); |
| 3694 | } |
| 3695 | |
| 3696 | int64_t ColumnPos = 0; |
| 3697 | if (getLexer().is(AsmToken::Integer)) { |
| 3698 | ColumnPos = getTok().getIntVal(); |
| 3699 | if (ColumnPos < 0) |
| 3700 | return TokError("column position less than zero in '.cv_loc' directive"); |
| 3701 | Lex(); |
| 3702 | } |
| 3703 | |
| 3704 | bool PrologueEnd = false; |
| 3705 | uint64_t IsStmt = 0; |
| 3706 | |
| 3707 | auto parseOp = [&]() -> bool { |
| 3708 | StringRef Name; |
| 3709 | SMLoc Loc = getTok().getLoc(); |
| 3710 | if (parseIdentifier(Name)) |
| 3711 | return TokError("unexpected token in '.cv_loc' directive"); |
| 3712 | if (Name == "prologue_end") |
| 3713 | PrologueEnd = true; |
| 3714 | else if (Name == "is_stmt") { |
| 3715 | Loc = getTok().getLoc(); |
| 3716 | const MCExpr *Value; |
| 3717 | if (parseExpression(Value)) |
| 3718 | return true; |
| 3719 | // The expression must be the constant 0 or 1. |
| 3720 | IsStmt = ~0ULL; |
| 3721 | if (const auto *MCE = dyn_cast<MCConstantExpr>(Value)) |
| 3722 | IsStmt = MCE->getValue(); |
| 3723 | |
| 3724 | if (IsStmt > 1) |
| 3725 | return Error(Loc, "is_stmt value not 0 or 1"); |
| 3726 | } else { |
| 3727 | return Error(Loc, "unknown sub-directive in '.cv_loc' directive"); |
| 3728 | } |
| 3729 | return false; |
| 3730 | }; |
| 3731 | |
| 3732 | if (parseMany(parseOp, false /*hasComma*/)) |
| 3733 | return true; |
| 3734 | |
| 3735 | getStreamer().EmitCVLocDirective(FunctionId, FileNumber, LineNumber, |
| 3736 | ColumnPos, PrologueEnd, IsStmt, StringRef(), |
| 3737 | DirectiveLoc); |
| 3738 | return false; |
| 3739 | } |
| 3740 | |
| 3741 | /// parseDirectiveCVLinetable |
| 3742 | /// ::= .cv_linetable FunctionId, FnStart, FnEnd |
| 3743 | bool AsmParser::parseDirectiveCVLinetable() { |
| 3744 | int64_t FunctionId; |
| 3745 | StringRef FnStartName, FnEndName; |
| 3746 | SMLoc Loc = getTok().getLoc(); |
| 3747 | if (parseCVFunctionId(FunctionId, ".cv_linetable") || |
| 3748 | parseToken(AsmToken::Comma, |
| 3749 | "unexpected token in '.cv_linetable' directive") || |
| 3750 | parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc, |
| 3751 | "expected identifier in directive") || |
| 3752 | parseToken(AsmToken::Comma, |
| 3753 | "unexpected token in '.cv_linetable' directive") || |
| 3754 | parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc, |
| 3755 | "expected identifier in directive")) |
| 3756 | return true; |
| 3757 | |
| 3758 | MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName); |
| 3759 | MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName); |
| 3760 | |
| 3761 | getStreamer().EmitCVLinetableDirective(FunctionId, FnStartSym, FnEndSym); |
| 3762 | return false; |
| 3763 | } |
| 3764 | |
| 3765 | /// parseDirectiveCVInlineLinetable |
| 3766 | /// ::= .cv_inline_linetable PrimaryFunctionId FileId LineNum FnStart FnEnd |
| 3767 | bool AsmParser::parseDirectiveCVInlineLinetable() { |
| 3768 | int64_t PrimaryFunctionId, SourceFileId, SourceLineNum; |
| 3769 | StringRef FnStartName, FnEndName; |
| 3770 | SMLoc Loc = getTok().getLoc(); |
| 3771 | if (parseCVFunctionId(PrimaryFunctionId, ".cv_inline_linetable") || |
| 3772 | parseTokenLoc(Loc) || |
| 3773 | parseIntToken( |
| 3774 | SourceFileId, |
| 3775 | "expected SourceField in '.cv_inline_linetable' directive") || |
| 3776 | check(SourceFileId <= 0, Loc, |
| 3777 | "File id less than zero in '.cv_inline_linetable' directive") || |
| 3778 | parseTokenLoc(Loc) || |
| 3779 | parseIntToken( |
| 3780 | SourceLineNum, |
| 3781 | "expected SourceLineNum in '.cv_inline_linetable' directive") || |
| 3782 | check(SourceLineNum < 0, Loc, |
| 3783 | "Line number less than zero in '.cv_inline_linetable' directive") || |
| 3784 | parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc, |
| 3785 | "expected identifier in directive") || |
| 3786 | parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc, |
| 3787 | "expected identifier in directive")) |
| 3788 | return true; |
| 3789 | |
| 3790 | if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement")) |
| 3791 | return true; |
| 3792 | |
| 3793 | MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName); |
| 3794 | MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName); |
| 3795 | getStreamer().EmitCVInlineLinetableDirective(PrimaryFunctionId, SourceFileId, |
| 3796 | SourceLineNum, FnStartSym, |
| 3797 | FnEndSym); |
| 3798 | return false; |
| 3799 | } |
| 3800 | |
| 3801 | /// parseDirectiveCVDefRange |
| 3802 | /// ::= .cv_def_range RangeStart RangeEnd (GapStart GapEnd)*, bytes* |
| 3803 | bool AsmParser::parseDirectiveCVDefRange() { |
| 3804 | SMLoc Loc; |
| 3805 | std::vector<std::pair<const MCSymbol *, const MCSymbol *>> Ranges; |
| 3806 | while (getLexer().is(AsmToken::Identifier)) { |
| 3807 | Loc = getLexer().getLoc(); |
| 3808 | StringRef GapStartName; |
| 3809 | if (parseIdentifier(GapStartName)) |
| 3810 | return Error(Loc, "expected identifier in directive"); |
| 3811 | MCSymbol *GapStartSym = getContext().getOrCreateSymbol(GapStartName); |
| 3812 | |
| 3813 | Loc = getLexer().getLoc(); |
| 3814 | StringRef GapEndName; |
| 3815 | if (parseIdentifier(GapEndName)) |
| 3816 | return Error(Loc, "expected identifier in directive"); |
| 3817 | MCSymbol *GapEndSym = getContext().getOrCreateSymbol(GapEndName); |
| 3818 | |
| 3819 | Ranges.push_back({GapStartSym, GapEndSym}); |
| 3820 | } |
| 3821 | |
| 3822 | std::string FixedSizePortion; |
| 3823 | if (parseToken(AsmToken::Comma, "unexpected token in directive") || |
| 3824 | parseEscapedString(FixedSizePortion)) |
| 3825 | return true; |
| 3826 | |
| 3827 | getStreamer().EmitCVDefRangeDirective(Ranges, FixedSizePortion); |
| 3828 | return false; |
| 3829 | } |
| 3830 | |
| 3831 | /// parseDirectiveCVString |
| 3832 | /// ::= .cv_stringtable "string" |
| 3833 | bool AsmParser::parseDirectiveCVString() { |
| 3834 | std::string Data; |
| 3835 | if (checkForValidSection() || parseEscapedString(Data)) |
| 3836 | return addErrorSuffix(" in '.cv_string' directive"); |
| 3837 | |
| 3838 | // Put the string in the table and emit the offset. |
| 3839 | std::pair<StringRef, unsigned> Insertion = |
| 3840 | getCVContext().addToStringTable(Data); |
| 3841 | getStreamer().EmitIntValue(Insertion.second, 4); |
| 3842 | return false; |
| 3843 | } |
| 3844 | |
| 3845 | /// parseDirectiveCVStringTable |
| 3846 | /// ::= .cv_stringtable |
| 3847 | bool AsmParser::parseDirectiveCVStringTable() { |
| 3848 | getStreamer().EmitCVStringTableDirective(); |
| 3849 | return false; |
| 3850 | } |
| 3851 | |
| 3852 | /// parseDirectiveCVFileChecksums |
| 3853 | /// ::= .cv_filechecksums |
| 3854 | bool AsmParser::parseDirectiveCVFileChecksums() { |
| 3855 | getStreamer().EmitCVFileChecksumsDirective(); |
| 3856 | return false; |
| 3857 | } |
| 3858 | |
| 3859 | /// parseDirectiveCVFileChecksumOffset |
| 3860 | /// ::= .cv_filechecksumoffset fileno |
| 3861 | bool AsmParser::parseDirectiveCVFileChecksumOffset() { |
| 3862 | int64_t FileNo; |
| 3863 | if (parseIntToken(FileNo, "expected identifier in directive")) |
| 3864 | return true; |
| 3865 | if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement")) |
| 3866 | return true; |
| 3867 | getStreamer().EmitCVFileChecksumOffsetDirective(FileNo); |
| 3868 | return false; |
| 3869 | } |
| 3870 | |
| 3871 | /// parseDirectiveCVFPOData |
| 3872 | /// ::= .cv_fpo_data procsym |
| 3873 | bool AsmParser::parseDirectiveCVFPOData() { |
| 3874 | SMLoc DirLoc = getLexer().getLoc(); |
| 3875 | StringRef ProcName; |
| 3876 | if (parseIdentifier(ProcName)) |
| 3877 | return TokError("expected symbol name"); |
| 3878 | if (parseEOL("unexpected tokens")) |
| 3879 | return addErrorSuffix(" in '.cv_fpo_data' directive"); |
| 3880 | MCSymbol *ProcSym = getContext().getOrCreateSymbol(ProcName); |
| 3881 | getStreamer().EmitCVFPOData(ProcSym, DirLoc); |
| 3882 | return false; |
| 3883 | } |
| 3884 | |
| 3885 | /// parseDirectiveCFISections |
| 3886 | /// ::= .cfi_sections section [, section] |
| 3887 | bool AsmParser::parseDirectiveCFISections() { |
| 3888 | StringRef Name; |
| 3889 | bool EH = false; |
| 3890 | bool Debug = false; |
| 3891 | |
| 3892 | if (parseIdentifier(Name)) |
| 3893 | return TokError("Expected an identifier"); |
| 3894 | |
| 3895 | if (Name == ".eh_frame") |
| 3896 | EH = true; |
| 3897 | else if (Name == ".debug_frame") |
| 3898 | Debug = true; |
| 3899 | |
| 3900 | if (getLexer().is(AsmToken::Comma)) { |
| 3901 | Lex(); |
| 3902 | |
| 3903 | if (parseIdentifier(Name)) |
| 3904 | return TokError("Expected an identifier"); |
| 3905 | |
| 3906 | if (Name == ".eh_frame") |
| 3907 | EH = true; |
| 3908 | else if (Name == ".debug_frame") |
| 3909 | Debug = true; |
| 3910 | } |
| 3911 | |
| 3912 | getStreamer().EmitCFISections(EH, Debug); |
| 3913 | return false; |
| 3914 | } |
| 3915 | |
| 3916 | /// parseDirectiveCFIStartProc |
| 3917 | /// ::= .cfi_startproc [simple] |
| 3918 | bool AsmParser::parseDirectiveCFIStartProc() { |
| 3919 | StringRef Simple; |
| 3920 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { |
| 3921 | if (check(parseIdentifier(Simple) || Simple != "simple", |
| 3922 | "unexpected token") || |
| 3923 | parseToken(AsmToken::EndOfStatement)) |
| 3924 | return addErrorSuffix(" in '.cfi_startproc' directive"); |
| 3925 | } |
| 3926 | |
| 3927 | // TODO(kristina): Deal with a corner case of incorrect diagnostic context |
| 3928 | // being produced if this directive is emitted as part of preprocessor macro |
| 3929 | // expansion which can *ONLY* happen if Clang's cc1as is the API consumer. |
| 3930 | // Tools like llvm-mc on the other hand are not affected by it, and report |
| 3931 | // correct context information. |
| 3932 | getStreamer().EmitCFIStartProc(!Simple.empty(), Lexer.getLoc()); |
| 3933 | return false; |
| 3934 | } |
| 3935 | |
| 3936 | /// parseDirectiveCFIEndProc |
| 3937 | /// ::= .cfi_endproc |
| 3938 | bool AsmParser::parseDirectiveCFIEndProc() { |
| 3939 | getStreamer().EmitCFIEndProc(); |
| 3940 | return false; |
| 3941 | } |
| 3942 | |
| 3943 | /// parse register name or number. |
| 3944 | bool AsmParser::parseRegisterOrRegisterNumber(int64_t &Register, |
| 3945 | SMLoc DirectiveLoc) { |
| 3946 | unsigned RegNo; |
| 3947 | |
| 3948 | if (getLexer().isNot(AsmToken::Integer)) { |
| 3949 | if (getTargetParser().ParseRegister(RegNo, DirectiveLoc, DirectiveLoc)) |
| 3950 | return true; |
| 3951 | Register = getContext().getRegisterInfo()->getDwarfRegNum(RegNo, true); |
| 3952 | } else |
| 3953 | return parseAbsoluteExpression(Register); |
| 3954 | |
| 3955 | return false; |
| 3956 | } |
| 3957 | |
| 3958 | /// parseDirectiveCFIDefCfa |
| 3959 | /// ::= .cfi_def_cfa register, offset |
| 3960 | bool AsmParser::parseDirectiveCFIDefCfa(SMLoc DirectiveLoc) { |
| 3961 | int64_t Register = 0, Offset = 0; |
| 3962 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || |
| 3963 | parseToken(AsmToken::Comma, "unexpected token in directive") || |
| 3964 | parseAbsoluteExpression(Offset)) |
| 3965 | return true; |
| 3966 | |
| 3967 | getStreamer().EmitCFIDefCfa(Register, Offset); |
| 3968 | return false; |
| 3969 | } |
| 3970 | |
| 3971 | /// parseDirectiveCFIDefCfaOffset |
| 3972 | /// ::= .cfi_def_cfa_offset offset |
| 3973 | bool AsmParser::parseDirectiveCFIDefCfaOffset() { |
| 3974 | int64_t Offset = 0; |
| 3975 | if (parseAbsoluteExpression(Offset)) |
| 3976 | return true; |
| 3977 | |
| 3978 | getStreamer().EmitCFIDefCfaOffset(Offset); |
| 3979 | return false; |
| 3980 | } |
| 3981 | |
| 3982 | /// parseDirectiveCFIRegister |
| 3983 | /// ::= .cfi_register register, register |
| 3984 | bool AsmParser::parseDirectiveCFIRegister(SMLoc DirectiveLoc) { |
| 3985 | int64_t Register1 = 0, Register2 = 0; |
| 3986 | if (parseRegisterOrRegisterNumber(Register1, DirectiveLoc) || |
| 3987 | parseToken(AsmToken::Comma, "unexpected token in directive") || |
| 3988 | parseRegisterOrRegisterNumber(Register2, DirectiveLoc)) |
| 3989 | return true; |
| 3990 | |
| 3991 | getStreamer().EmitCFIRegister(Register1, Register2); |
| 3992 | return false; |
| 3993 | } |
| 3994 | |
| 3995 | /// parseDirectiveCFIWindowSave |
| 3996 | /// ::= .cfi_window_save |
| 3997 | bool AsmParser::parseDirectiveCFIWindowSave() { |
| 3998 | getStreamer().EmitCFIWindowSave(); |
| 3999 | return false; |
| 4000 | } |
| 4001 | |
| 4002 | /// parseDirectiveCFIAdjustCfaOffset |
| 4003 | /// ::= .cfi_adjust_cfa_offset adjustment |
| 4004 | bool AsmParser::parseDirectiveCFIAdjustCfaOffset() { |
| 4005 | int64_t Adjustment = 0; |
| 4006 | if (parseAbsoluteExpression(Adjustment)) |
| 4007 | return true; |
| 4008 | |
| 4009 | getStreamer().EmitCFIAdjustCfaOffset(Adjustment); |
| 4010 | return false; |
| 4011 | } |
| 4012 | |
| 4013 | /// parseDirectiveCFIDefCfaRegister |
| 4014 | /// ::= .cfi_def_cfa_register register |
| 4015 | bool AsmParser::parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc) { |
| 4016 | int64_t Register = 0; |
| 4017 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) |
| 4018 | return true; |
| 4019 | |
| 4020 | getStreamer().EmitCFIDefCfaRegister(Register); |
| 4021 | return false; |
| 4022 | } |
| 4023 | |
| 4024 | /// parseDirectiveCFIOffset |
| 4025 | /// ::= .cfi_offset register, offset |
| 4026 | bool AsmParser::parseDirectiveCFIOffset(SMLoc DirectiveLoc) { |
| 4027 | int64_t Register = 0; |
| 4028 | int64_t Offset = 0; |
| 4029 | |
| 4030 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || |
| 4031 | parseToken(AsmToken::Comma, "unexpected token in directive") || |
| 4032 | parseAbsoluteExpression(Offset)) |
| 4033 | return true; |
| 4034 | |
| 4035 | getStreamer().EmitCFIOffset(Register, Offset); |
| 4036 | return false; |
| 4037 | } |
| 4038 | |
| 4039 | /// parseDirectiveCFIRelOffset |
| 4040 | /// ::= .cfi_rel_offset register, offset |
| 4041 | bool AsmParser::parseDirectiveCFIRelOffset(SMLoc DirectiveLoc) { |
| 4042 | int64_t Register = 0, Offset = 0; |
| 4043 | |
| 4044 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) || |
| 4045 | parseToken(AsmToken::Comma, "unexpected token in directive") || |
| 4046 | parseAbsoluteExpression(Offset)) |
| 4047 | return true; |
| 4048 | |
| 4049 | getStreamer().EmitCFIRelOffset(Register, Offset); |
| 4050 | return false; |
| 4051 | } |
| 4052 | |
| 4053 | static bool isValidEncoding(int64_t Encoding) { |
| 4054 | if (Encoding & ~0xff) |
| 4055 | return false; |
| 4056 | |
| 4057 | if (Encoding == dwarf::DW_EH_PE_omit) |
| 4058 | return true; |
| 4059 | |
| 4060 | const unsigned Format = Encoding & 0xf; |
| 4061 | if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 && |
| 4062 | Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 && |
| 4063 | Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 && |
| 4064 | Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed) |
| 4065 | return false; |
| 4066 | |
| 4067 | const unsigned Application = Encoding & 0x70; |
| 4068 | if (Application != dwarf::DW_EH_PE_absptr && |
| 4069 | Application != dwarf::DW_EH_PE_pcrel) |
| 4070 | return false; |
| 4071 | |
| 4072 | return true; |
| 4073 | } |
| 4074 | |
| 4075 | /// parseDirectiveCFIPersonalityOrLsda |
| 4076 | /// IsPersonality true for cfi_personality, false for cfi_lsda |
| 4077 | /// ::= .cfi_personality encoding, [symbol_name] |
| 4078 | /// ::= .cfi_lsda encoding, [symbol_name] |
| 4079 | bool AsmParser::parseDirectiveCFIPersonalityOrLsda(bool IsPersonality) { |
| 4080 | int64_t Encoding = 0; |
| 4081 | if (parseAbsoluteExpression(Encoding)) |
| 4082 | return true; |
| 4083 | if (Encoding == dwarf::DW_EH_PE_omit) |
| 4084 | return false; |
| 4085 | |
| 4086 | StringRef Name; |
| 4087 | if (check(!isValidEncoding(Encoding), "unsupported encoding.") || |
| 4088 | parseToken(AsmToken::Comma, "unexpected token in directive") || |
| 4089 | check(parseIdentifier(Name), "expected identifier in directive")) |
| 4090 | return true; |
| 4091 | |
| 4092 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); |
| 4093 | |
| 4094 | if (IsPersonality) |
| 4095 | getStreamer().EmitCFIPersonality(Sym, Encoding); |
| 4096 | else |
| 4097 | getStreamer().EmitCFILsda(Sym, Encoding); |
| 4098 | return false; |
| 4099 | } |
| 4100 | |
| 4101 | /// parseDirectiveCFIRememberState |
| 4102 | /// ::= .cfi_remember_state |
| 4103 | bool AsmParser::parseDirectiveCFIRememberState() { |
| 4104 | getStreamer().EmitCFIRememberState(); |
| 4105 | return false; |
| 4106 | } |
| 4107 | |
| 4108 | /// parseDirectiveCFIRestoreState |
| 4109 | /// ::= .cfi_remember_state |
| 4110 | bool AsmParser::parseDirectiveCFIRestoreState() { |
| 4111 | getStreamer().EmitCFIRestoreState(); |
| 4112 | return false; |
| 4113 | } |
| 4114 | |
| 4115 | /// parseDirectiveCFISameValue |
| 4116 | /// ::= .cfi_same_value register |
| 4117 | bool AsmParser::parseDirectiveCFISameValue(SMLoc DirectiveLoc) { |
| 4118 | int64_t Register = 0; |
| 4119 | |
| 4120 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) |
| 4121 | return true; |
| 4122 | |
| 4123 | getStreamer().EmitCFISameValue(Register); |
| 4124 | return false; |
| 4125 | } |
| 4126 | |
| 4127 | /// parseDirectiveCFIRestore |
| 4128 | /// ::= .cfi_restore register |
| 4129 | bool AsmParser::parseDirectiveCFIRestore(SMLoc DirectiveLoc) { |
| 4130 | int64_t Register = 0; |
| 4131 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) |
| 4132 | return true; |
| 4133 | |
| 4134 | getStreamer().EmitCFIRestore(Register); |
| 4135 | return false; |
| 4136 | } |
| 4137 | |
| 4138 | /// parseDirectiveCFIEscape |
| 4139 | /// ::= .cfi_escape expression[,...] |
| 4140 | bool AsmParser::parseDirectiveCFIEscape() { |
| 4141 | std::string Values; |
| 4142 | int64_t CurrValue; |
| 4143 | if (parseAbsoluteExpression(CurrValue)) |
| 4144 | return true; |
| 4145 | |
| 4146 | Values.push_back((uint8_t)CurrValue); |
| 4147 | |
| 4148 | while (getLexer().is(AsmToken::Comma)) { |
| 4149 | Lex(); |
| 4150 | |
| 4151 | if (parseAbsoluteExpression(CurrValue)) |
| 4152 | return true; |
| 4153 | |
| 4154 | Values.push_back((uint8_t)CurrValue); |
| 4155 | } |
| 4156 | |
| 4157 | getStreamer().EmitCFIEscape(Values); |
| 4158 | return false; |
| 4159 | } |
| 4160 | |
| 4161 | /// parseDirectiveCFIReturnColumn |
| 4162 | /// ::= .cfi_return_column register |
| 4163 | bool AsmParser::parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc) { |
| 4164 | int64_t Register = 0; |
| 4165 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) |
| 4166 | return true; |
| 4167 | getStreamer().EmitCFIReturnColumn(Register); |
| 4168 | return false; |
| 4169 | } |
| 4170 | |
| 4171 | /// parseDirectiveCFISignalFrame |
| 4172 | /// ::= .cfi_signal_frame |
| 4173 | bool AsmParser::parseDirectiveCFISignalFrame() { |
| 4174 | if (parseToken(AsmToken::EndOfStatement, |
| 4175 | "unexpected token in '.cfi_signal_frame'")) |
| 4176 | return true; |
| 4177 | |
| 4178 | getStreamer().EmitCFISignalFrame(); |
| 4179 | return false; |
| 4180 | } |
| 4181 | |
| 4182 | /// parseDirectiveCFIUndefined |
| 4183 | /// ::= .cfi_undefined register |
| 4184 | bool AsmParser::parseDirectiveCFIUndefined(SMLoc DirectiveLoc) { |
| 4185 | int64_t Register = 0; |
| 4186 | |
| 4187 | if (parseRegisterOrRegisterNumber(Register, DirectiveLoc)) |
| 4188 | return true; |
| 4189 | |
| 4190 | getStreamer().EmitCFIUndefined(Register); |
| 4191 | return false; |
| 4192 | } |
| 4193 | |
| 4194 | /// parseDirectiveAltmacro |
| 4195 | /// ::= .altmacro |
| 4196 | /// ::= .noaltmacro |
| 4197 | bool AsmParser::parseDirectiveAltmacro(StringRef Directive) { |
| 4198 | if (getLexer().isNot(AsmToken::EndOfStatement)) |
| 4199 | return TokError("unexpected token in '" + Directive + "' directive"); |
| 4200 | AltMacroMode = (Directive == ".altmacro"); |
| 4201 | return false; |
| 4202 | } |
| 4203 | |
| 4204 | /// parseDirectiveMacrosOnOff |
| 4205 | /// ::= .macros_on |
| 4206 | /// ::= .macros_off |
| 4207 | bool AsmParser::parseDirectiveMacrosOnOff(StringRef Directive) { |
| 4208 | if (parseToken(AsmToken::EndOfStatement, |
| 4209 | "unexpected token in '" + Directive + "' directive")) |
| 4210 | return true; |
| 4211 | |
| 4212 | setMacrosEnabled(Directive == ".macros_on"); |
| 4213 | return false; |
| 4214 | } |
| 4215 | |
| 4216 | /// parseDirectiveMacro |
| 4217 | /// ::= .macro name[,] [parameters] |
| 4218 | bool AsmParser::parseDirectiveMacro(SMLoc DirectiveLoc) { |
| 4219 | StringRef Name; |
| 4220 | if (parseIdentifier(Name)) |
| 4221 | return TokError("expected identifier in '.macro' directive"); |
| 4222 | |
| 4223 | if (getLexer().is(AsmToken::Comma)) |
| 4224 | Lex(); |
| 4225 | |
| 4226 | MCAsmMacroParameters Parameters; |
| 4227 | while (getLexer().isNot(AsmToken::EndOfStatement)) { |
| 4228 | |
| 4229 | if (!Parameters.empty() && Parameters.back().Vararg) |
| 4230 | return Error(Lexer.getLoc(), |
| 4231 | "Vararg parameter '" + Parameters.back().Name + |
| 4232 | "' should be last one in the list of parameters."); |
| 4233 | |
| 4234 | MCAsmMacroParameter Parameter; |
| 4235 | if (parseIdentifier(Parameter.Name)) |
| 4236 | return TokError("expected identifier in '.macro' directive"); |
| 4237 | |
| 4238 | // Emit an error if two (or more) named parameters share the same name |
| 4239 | for (const MCAsmMacroParameter& CurrParam : Parameters) |
| 4240 | if (CurrParam.Name.equals(Parameter.Name)) |
| 4241 | return TokError("macro '" + Name + "' has multiple parameters" |
| 4242 | " named '" + Parameter.Name + "'"); |
| 4243 | |
| 4244 | if (Lexer.is(AsmToken::Colon)) { |
| 4245 | Lex(); // consume ':' |
| 4246 | |
| 4247 | SMLoc QualLoc; |
| 4248 | StringRef Qualifier; |
| 4249 | |
| 4250 | QualLoc = Lexer.getLoc(); |
| 4251 | if (parseIdentifier(Qualifier)) |
| 4252 | return Error(QualLoc, "missing parameter qualifier for " |
| 4253 | "'" + Parameter.Name + "' in macro '" + Name + "'"); |
| 4254 | |
| 4255 | if (Qualifier == "req") |
| 4256 | Parameter.Required = true; |
| 4257 | else if (Qualifier == "vararg") |
| 4258 | Parameter.Vararg = true; |
| 4259 | else |
| 4260 | return Error(QualLoc, Qualifier + " is not a valid parameter qualifier " |
| 4261 | "for '" + Parameter.Name + "' in macro '" + Name + "'"); |
| 4262 | } |
| 4263 | |
| 4264 | if (getLexer().is(AsmToken::Equal)) { |
| 4265 | Lex(); |
| 4266 | |
| 4267 | SMLoc ParamLoc; |
| 4268 | |
| 4269 | ParamLoc = Lexer.getLoc(); |
| 4270 | if (parseMacroArgument(Parameter.Value, /*Vararg=*/false )) |
| 4271 | return true; |
| 4272 | |
| 4273 | if (Parameter.Required) |
| 4274 | Warning(ParamLoc, "pointless default value for required parameter " |
| 4275 | "'" + Parameter.Name + "' in macro '" + Name + "'"); |
| 4276 | } |
| 4277 | |
| 4278 | Parameters.push_back(std::move(Parameter)); |
| 4279 | |
| 4280 | if (getLexer().is(AsmToken::Comma)) |
| 4281 | Lex(); |
| 4282 | } |
| 4283 | |
| 4284 | // Eat just the end of statement. |
| 4285 | Lexer.Lex(); |
| 4286 | |
| 4287 | // Consuming deferred text, so use Lexer.Lex to ignore Lexing Errors |
| 4288 | AsmToken EndToken, StartToken = getTok(); |
| 4289 | unsigned MacroDepth = 0; |
| 4290 | // Lex the macro definition. |
| 4291 | while (true) { |
| 4292 | // Ignore Lexing errors in macros. |
| 4293 | while (Lexer.is(AsmToken::Error)) { |
| 4294 | Lexer.Lex(); |
| 4295 | } |
| 4296 | |
| 4297 | // Check whether we have reached the end of the file. |
| 4298 | if (getLexer().is(AsmToken::Eof)) |
| 4299 | return Error(DirectiveLoc, "no matching '.endmacro' in definition"); |
| 4300 | |
| 4301 | // Otherwise, check whether we have reach the .endmacro. |
| 4302 | if (getLexer().is(AsmToken::Identifier)) { |
| 4303 | if (getTok().getIdentifier() == ".endm" || |
| 4304 | getTok().getIdentifier() == ".endmacro") { |
| 4305 | if (MacroDepth == 0) { // Outermost macro. |
| 4306 | EndToken = getTok(); |
| 4307 | Lexer.Lex(); |
| 4308 | if (getLexer().isNot(AsmToken::EndOfStatement)) |
| 4309 | return TokError("unexpected token in '" + EndToken.getIdentifier() + |
| 4310 | "' directive"); |
| 4311 | break; |
| 4312 | } else { |
| 4313 | // Otherwise we just found the end of an inner macro. |
| 4314 | --MacroDepth; |
| 4315 | } |
| 4316 | } else if (getTok().getIdentifier() == ".macro") { |
| 4317 | // We allow nested macros. Those aren't instantiated until the outermost |
| 4318 | // macro is expanded so just ignore them for now. |
| 4319 | ++MacroDepth; |
| 4320 | } |
| 4321 | } |
| 4322 | |
| 4323 | // Otherwise, scan til the end of the statement. |
| 4324 | eatToEndOfStatement(); |
| 4325 | } |
| 4326 | |
| 4327 | if (getContext().lookupMacro(Name)) { |
| 4328 | return Error(DirectiveLoc, "macro '" + Name + "' is already defined"); |
| 4329 | } |
| 4330 | |
| 4331 | const char *BodyStart = StartToken.getLoc().getPointer(); |
| 4332 | const char *BodyEnd = EndToken.getLoc().getPointer(); |
| 4333 | StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart); |
| 4334 | checkForBadMacro(DirectiveLoc, Name, Body, Parameters); |
| 4335 | MCAsmMacro Macro(Name, Body, std::move(Parameters)); |
| 4336 | DEBUG_WITH_TYPE("asm-macros", dbgs() << "Defining new macro:\n";do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("asm-macros")) { dbgs() << "Defining new macro:\n"; Macro .dump(); } } while (false) |
| 4337 | Macro.dump())do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("asm-macros")) { dbgs() << "Defining new macro:\n"; Macro .dump(); } } while (false); |
| 4338 | getContext().defineMacro(Name, std::move(Macro)); |
| 4339 | return false; |
| 4340 | } |
| 4341 | |
| 4342 | /// checkForBadMacro |
| 4343 | /// |
| 4344 | /// With the support added for named parameters there may be code out there that |
| 4345 | /// is transitioning from positional parameters. In versions of gas that did |
| 4346 | /// not support named parameters they would be ignored on the macro definition. |
| 4347 | /// But to support both styles of parameters this is not possible so if a macro |
| 4348 | /// definition has named parameters but does not use them and has what appears |
| 4349 | /// to be positional parameters, strings like $1, $2, ... and $n, then issue a |
| 4350 | /// warning that the positional parameter found in body which have no effect. |
| 4351 | /// Hoping the developer will either remove the named parameters from the macro |
| 4352 | /// definition so the positional parameters get used if that was what was |
| 4353 | /// intended or change the macro to use the named parameters. It is possible |
| 4354 | /// this warning will trigger when the none of the named parameters are used |
| 4355 | /// and the strings like $1 are infact to simply to be passed trough unchanged. |
| 4356 | void AsmParser::checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, |
| 4357 | StringRef Body, |
| 4358 | ArrayRef<MCAsmMacroParameter> Parameters) { |
| 4359 | // If this macro is not defined with named parameters the warning we are |
| 4360 | // checking for here doesn't apply. |
| 4361 | unsigned NParameters = Parameters.size(); |
| 4362 | if (NParameters == 0) |
| 4363 | return; |
| 4364 | |
| 4365 | bool NamedParametersFound = false; |
| 4366 | bool PositionalParametersFound = false; |
| 4367 | |
| 4368 | // Look at the body of the macro for use of both the named parameters and what |
| 4369 | // are likely to be positional parameters. This is what expandMacro() is |
| 4370 | // doing when it finds the parameters in the body. |
| 4371 | while (!Body.empty()) { |
| 4372 | // Scan for the next possible parameter. |
| 4373 | std::size_t End = Body.size(), Pos = 0; |
| 4374 | for (; Pos != End; ++Pos) { |
| 4375 | // Check for a substitution or escape. |
| 4376 | // This macro is defined with parameters, look for \foo, \bar, etc. |
| 4377 | if (Body[Pos] == '\\' && Pos + 1 != End) |
| 4378 | break; |
| 4379 | |
| 4380 | // This macro should have parameters, but look for $0, $1, ..., $n too. |
| 4381 | if (Body[Pos] != '$' || Pos + 1 == End) |
| 4382 | continue; |
| 4383 | char Next = Body[Pos + 1]; |
| 4384 | if (Next == '$' || Next == 'n' || |
| 4385 | isdigit(static_cast<unsigned char>(Next))) |
| 4386 | break; |
| 4387 | } |
| 4388 | |
| 4389 | // Check if we reached the end. |
| 4390 | if (Pos == End) |
| 4391 | break; |
| 4392 | |
| 4393 | if (Body[Pos] == '$') { |
| 4394 | switch (Body[Pos + 1]) { |
| 4395 | // $$ => $ |
| 4396 | case '$': |
| 4397 | break; |
| 4398 | |
| 4399 | // $n => number of arguments |
| 4400 | case 'n': |
| 4401 | PositionalParametersFound = true; |
| 4402 | break; |
| 4403 | |
| 4404 | // $[0-9] => argument |
| 4405 | default: { |
| 4406 | PositionalParametersFound = true; |
| 4407 | break; |
| 4408 | } |
| 4409 | } |
| 4410 | Pos += 2; |
| 4411 | } else { |
| 4412 | unsigned I = Pos + 1; |
| 4413 | while (isIdentifierChar(Body[I]) && I + 1 != End) |
| 4414 | ++I; |
| 4415 | |
| 4416 | const char *Begin = Body.data() + Pos + 1; |
| 4417 | StringRef Argument(Begin, I - (Pos + 1)); |
| 4418 | unsigned Index = 0; |
| 4419 | for (; Index < NParameters; ++Index) |
| 4420 | if (Parameters[Index].Name == Argument) |
| 4421 | break; |
| 4422 | |
| 4423 | if (Index == NParameters) { |
| 4424 | if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')') |
| 4425 | Pos += 3; |
| 4426 | else { |
| 4427 | Pos = I; |
| 4428 | } |
| 4429 | } else { |
| 4430 | NamedParametersFound = true; |
| 4431 | Pos += 1 + Argument.size(); |
| 4432 | } |
| 4433 | } |
| 4434 | // Update the scan point. |
| 4435 | Body = Body.substr(Pos); |
| 4436 | } |
| 4437 | |
| 4438 | if (!NamedParametersFound && PositionalParametersFound) |
| 4439 | Warning(DirectiveLoc, "macro defined with named parameters which are not " |
| 4440 | "used in macro body, possible positional parameter " |
| 4441 | "found in body which will have no effect"); |
| 4442 | } |
| 4443 | |
| 4444 | /// parseDirectiveExitMacro |
| 4445 | /// ::= .exitm |
| 4446 | bool AsmParser::parseDirectiveExitMacro(StringRef Directive) { |
| 4447 | if (parseToken(AsmToken::EndOfStatement, |
| 4448 | "unexpected token in '" + Directive + "' directive")) |
| 4449 | return true; |
| 4450 | |
| 4451 | if (!isInsideMacroInstantiation()) |
| 4452 | return TokError("unexpected '" + Directive + "' in file, " |
| 4453 | "no current macro definition"); |
| 4454 | |
| 4455 | // Exit all conditionals that are active in the current macro. |
| 4456 | while (TheCondStack.size() != ActiveMacros.back()->CondStackDepth) { |
| 4457 | TheCondState = TheCondStack.back(); |
| 4458 | TheCondStack.pop_back(); |
| 4459 | } |
| 4460 | |
| 4461 | handleMacroExit(); |
| 4462 | return false; |
| 4463 | } |
| 4464 | |
| 4465 | /// parseDirectiveEndMacro |
| 4466 | /// ::= .endm |
| 4467 | /// ::= .endmacro |
| 4468 | bool AsmParser::parseDirectiveEndMacro(StringRef Directive) { |
| 4469 | if (getLexer().isNot(AsmToken::EndOfStatement)) |
| 4470 | return TokError("unexpected token in '" + Directive + "' directive"); |
| 4471 | |
| 4472 | // If we are inside a macro instantiation, terminate the current |
| 4473 | // instantiation. |
| 4474 | if (isInsideMacroInstantiation()) { |
| 4475 | handleMacroExit(); |
| 4476 | return false; |
| 4477 | } |
| 4478 | |
| 4479 | // Otherwise, this .endmacro is a stray entry in the file; well formed |
| 4480 | // .endmacro directives are handled during the macro definition parsing. |
| 4481 | return TokError("unexpected '" + Directive + "' in file, " |
| 4482 | "no current macro definition"); |
| 4483 | } |
| 4484 | |
| 4485 | /// parseDirectivePurgeMacro |
| 4486 | /// ::= .purgem |
| 4487 | bool AsmParser::parseDirectivePurgeMacro(SMLoc DirectiveLoc) { |
| 4488 | StringRef Name; |
| 4489 | SMLoc Loc; |
| 4490 | if (parseTokenLoc(Loc) || |
| 4491 | check(parseIdentifier(Name), Loc, |
| 4492 | "expected identifier in '.purgem' directive") || |
| 4493 | parseToken(AsmToken::EndOfStatement, |
| 4494 | "unexpected token in '.purgem' directive")) |
| 4495 | return true; |
| 4496 | |
| 4497 | if (!getContext().lookupMacro(Name)) |
| 4498 | return Error(DirectiveLoc, "macro '" + Name + "' is not defined"); |
| 4499 | |
| 4500 | getContext().undefineMacro(Name); |
| 4501 | DEBUG_WITH_TYPE("asm-macros", dbgs()do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("asm-macros")) { dbgs() << "Un-defining macro: " << Name << "\n"; } } while (false) |
| 4502 | << "Un-defining macro: " << Name << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("asm-macros")) { dbgs() << "Un-defining macro: " << Name << "\n"; } } while (false); |
| 4503 | return false; |
| 4504 | } |
| 4505 | |
| 4506 | /// parseDirectiveBundleAlignMode |
| 4507 | /// ::= {.bundle_align_mode} expression |
| 4508 | bool AsmParser::parseDirectiveBundleAlignMode() { |
| 4509 | // Expect a single argument: an expression that evaluates to a constant |
| 4510 | // in the inclusive range 0-30. |
| 4511 | SMLoc ExprLoc = getLexer().getLoc(); |
| 4512 | int64_t AlignSizePow2; |
| 4513 | if (checkForValidSection() || parseAbsoluteExpression(AlignSizePow2) || |
| 4514 | parseToken(AsmToken::EndOfStatement, "unexpected token after expression " |
| 4515 | "in '.bundle_align_mode' " |
| 4516 | "directive") || |
| 4517 | check(AlignSizePow2 < 0 || AlignSizePow2 > 30, ExprLoc, |
| 4518 | "invalid bundle alignment size (expected between 0 and 30)")) |
| 4519 | return true; |
| 4520 | |
| 4521 | // Because of AlignSizePow2's verified range we can safely truncate it to |
| 4522 | // unsigned. |
| 4523 | getStreamer().EmitBundleAlignMode(static_cast<unsigned>(AlignSizePow2)); |
| 4524 | return false; |
| 4525 | } |
| 4526 | |
| 4527 | /// parseDirectiveBundleLock |
| 4528 | /// ::= {.bundle_lock} [align_to_end] |
| 4529 | bool AsmParser::parseDirectiveBundleLock() { |
| 4530 | if (checkForValidSection()) |
| 4531 | return true; |
| 4532 | bool AlignToEnd = false; |
| 4533 | |
| 4534 | StringRef Option; |
| 4535 | SMLoc Loc = getTok().getLoc(); |
| 4536 | const char *kInvalidOptionError = |
| 4537 | "invalid option for '.bundle_lock' directive"; |
| 4538 | |
| 4539 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { |
| 4540 | if (check(parseIdentifier(Option), Loc, kInvalidOptionError) || |
| 4541 | check(Option != "align_to_end", Loc, kInvalidOptionError) || |
| 4542 | parseToken(AsmToken::EndOfStatement, |
| 4543 | "unexpected token after '.bundle_lock' directive option")) |
| 4544 | return true; |
| 4545 | AlignToEnd = true; |
| 4546 | } |
| 4547 | |
| 4548 | getStreamer().EmitBundleLock(AlignToEnd); |
| 4549 | return false; |
| 4550 | } |
| 4551 | |
| 4552 | /// parseDirectiveBundleLock |
| 4553 | /// ::= {.bundle_lock} |
| 4554 | bool AsmParser::parseDirectiveBundleUnlock() { |
| 4555 | if (checkForValidSection() || |
| 4556 | parseToken(AsmToken::EndOfStatement, |
| 4557 | "unexpected token in '.bundle_unlock' directive")) |
| 4558 | return true; |
| 4559 | |
| 4560 | getStreamer().EmitBundleUnlock(); |
| 4561 | return false; |
| 4562 | } |
| 4563 | |
| 4564 | /// parseDirectiveSpace |
| 4565 | /// ::= (.skip | .space) expression [ , expression ] |
| 4566 | bool AsmParser::parseDirectiveSpace(StringRef IDVal) { |
| 4567 | SMLoc NumBytesLoc = Lexer.getLoc(); |
| 4568 | const MCExpr *NumBytes; |
| 4569 | if (checkForValidSection() || parseExpression(NumBytes)) |
| 4570 | return true; |
| 4571 | |
| 4572 | int64_t FillExpr = 0; |
| 4573 | if (parseOptionalToken(AsmToken::Comma)) |
| 4574 | if (parseAbsoluteExpression(FillExpr)) |
| 4575 | return addErrorSuffix("in '" + Twine(IDVal) + "' directive"); |
| 4576 | if (parseToken(AsmToken::EndOfStatement)) |
| 4577 | return addErrorSuffix("in '" + Twine(IDVal) + "' directive"); |
| 4578 | |
| 4579 | // FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0. |
| 4580 | getStreamer().emitFill(*NumBytes, FillExpr, NumBytesLoc); |
| 4581 | |
| 4582 | return false; |
| 4583 | } |
| 4584 | |
| 4585 | /// parseDirectiveDCB |
| 4586 | /// ::= .dcb.{b, l, w} expression, expression |
| 4587 | bool AsmParser::parseDirectiveDCB(StringRef IDVal, unsigned Size) { |
| 4588 | SMLoc NumValuesLoc = Lexer.getLoc(); |
| 4589 | int64_t NumValues; |
| 4590 | if (checkForValidSection() || parseAbsoluteExpression(NumValues)) |
| 4591 | return true; |
| 4592 | |
| 4593 | if (NumValues < 0) { |
| 4594 | Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect"); |
| 4595 | return false; |
| 4596 | } |
| 4597 | |
| 4598 | if (parseToken(AsmToken::Comma, |
| 4599 | "unexpected token in '" + Twine(IDVal) + "' directive")) |
| 4600 | return true; |
| 4601 | |
| 4602 | const MCExpr *Value; |
| 4603 | SMLoc ExprLoc = getLexer().getLoc(); |
| 4604 | if (parseExpression(Value)) |
| 4605 | return true; |
| 4606 | |
| 4607 | // Special case constant expressions to match code generator. |
| 4608 | if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { |
| 4609 | assert(Size <= 8 && "Invalid size")((Size <= 8 && "Invalid size") ? static_cast<void > (0) : __assert_fail ("Size <= 8 && \"Invalid size\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 4609, __PRETTY_FUNCTION__)); |
| 4610 | uint64_t IntValue = MCE->getValue(); |
| 4611 | if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue)) |
| 4612 | return Error(ExprLoc, "literal value out of range for directive"); |
| 4613 | for (uint64_t i = 0, e = NumValues; i != e; ++i) |
| 4614 | getStreamer().EmitIntValue(IntValue, Size); |
| 4615 | } else { |
| 4616 | for (uint64_t i = 0, e = NumValues; i != e; ++i) |
| 4617 | getStreamer().EmitValue(Value, Size, ExprLoc); |
| 4618 | } |
| 4619 | |
| 4620 | if (parseToken(AsmToken::EndOfStatement, |
| 4621 | "unexpected token in '" + Twine(IDVal) + "' directive")) |
| 4622 | return true; |
| 4623 | |
| 4624 | return false; |
| 4625 | } |
| 4626 | |
| 4627 | /// parseDirectiveRealDCB |
| 4628 | /// ::= .dcb.{d, s} expression, expression |
| 4629 | bool AsmParser::parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &Semantics) { |
| 4630 | SMLoc NumValuesLoc = Lexer.getLoc(); |
| 4631 | int64_t NumValues; |
| 4632 | if (checkForValidSection() || parseAbsoluteExpression(NumValues)) |
| 4633 | return true; |
| 4634 | |
| 4635 | if (NumValues < 0) { |
| 4636 | Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect"); |
| 4637 | return false; |
| 4638 | } |
| 4639 | |
| 4640 | if (parseToken(AsmToken::Comma, |
| 4641 | "unexpected token in '" + Twine(IDVal) + "' directive")) |
| 4642 | return true; |
| 4643 | |
| 4644 | APInt AsInt; |
| 4645 | if (parseRealValue(Semantics, AsInt)) |
| 4646 | return true; |
| 4647 | |
| 4648 | if (parseToken(AsmToken::EndOfStatement, |
| 4649 | "unexpected token in '" + Twine(IDVal) + "' directive")) |
| 4650 | return true; |
| 4651 | |
| 4652 | for (uint64_t i = 0, e = NumValues; i != e; ++i) |
| 4653 | getStreamer().EmitIntValue(AsInt.getLimitedValue(), |
| 4654 | AsInt.getBitWidth() / 8); |
| 4655 | |
| 4656 | return false; |
| 4657 | } |
| 4658 | |
| 4659 | /// parseDirectiveDS |
| 4660 | /// ::= .ds.{b, d, l, p, s, w, x} expression |
| 4661 | bool AsmParser::parseDirectiveDS(StringRef IDVal, unsigned Size) { |
| 4662 | SMLoc NumValuesLoc = Lexer.getLoc(); |
| 4663 | int64_t NumValues; |
| 4664 | if (checkForValidSection() || parseAbsoluteExpression(NumValues)) |
| 4665 | return true; |
| 4666 | |
| 4667 | if (NumValues < 0) { |
| 4668 | Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect"); |
| 4669 | return false; |
| 4670 | } |
| 4671 | |
| 4672 | if (parseToken(AsmToken::EndOfStatement, |
| 4673 | "unexpected token in '" + Twine(IDVal) + "' directive")) |
| 4674 | return true; |
| 4675 | |
| 4676 | for (uint64_t i = 0, e = NumValues; i != e; ++i) |
| 4677 | getStreamer().emitFill(Size, 0); |
| 4678 | |
| 4679 | return false; |
| 4680 | } |
| 4681 | |
| 4682 | /// parseDirectiveLEB128 |
| 4683 | /// ::= (.sleb128 | .uleb128) [ expression (, expression)* ] |
| 4684 | bool AsmParser::parseDirectiveLEB128(bool Signed) { |
| 4685 | if (checkForValidSection()) |
| 4686 | return true; |
| 4687 | |
| 4688 | auto parseOp = [&]() -> bool { |
| 4689 | const MCExpr *Value; |
| 4690 | if (parseExpression(Value)) |
| 4691 | return true; |
| 4692 | if (Signed) |
| 4693 | getStreamer().EmitSLEB128Value(Value); |
| 4694 | else |
| 4695 | getStreamer().EmitULEB128Value(Value); |
| 4696 | return false; |
| 4697 | }; |
| 4698 | |
| 4699 | if (parseMany(parseOp)) |
| 4700 | return addErrorSuffix(" in directive"); |
| 4701 | |
| 4702 | return false; |
| 4703 | } |
| 4704 | |
| 4705 | /// parseDirectiveSymbolAttribute |
| 4706 | /// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ] |
| 4707 | bool AsmParser::parseDirectiveSymbolAttribute(MCSymbolAttr Attr) { |
| 4708 | auto parseOp = [&]() -> bool { |
| 4709 | StringRef Name; |
| 4710 | SMLoc Loc = getTok().getLoc(); |
| 4711 | if (parseIdentifier(Name)) |
| 4712 | return Error(Loc, "expected identifier"); |
| 4713 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); |
| 4714 | |
| 4715 | // Assembler local symbols don't make any sense here. Complain loudly. |
| 4716 | if (Sym->isTemporary()) |
| 4717 | return Error(Loc, "non-local symbol required"); |
| 4718 | |
| 4719 | if (!getStreamer().EmitSymbolAttribute(Sym, Attr)) |
| 4720 | return Error(Loc, "unable to emit symbol attribute"); |
| 4721 | return false; |
| 4722 | }; |
| 4723 | |
| 4724 | if (parseMany(parseOp)) |
| 4725 | return addErrorSuffix(" in directive"); |
| 4726 | return false; |
| 4727 | } |
| 4728 | |
| 4729 | /// parseDirectiveComm |
| 4730 | /// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ] |
| 4731 | bool AsmParser::parseDirectiveComm(bool IsLocal) { |
| 4732 | if (checkForValidSection()) |
| 4733 | return true; |
| 4734 | |
| 4735 | SMLoc IDLoc = getLexer().getLoc(); |
| 4736 | StringRef Name; |
| 4737 | if (parseIdentifier(Name)) |
| 4738 | return TokError("expected identifier in directive"); |
| 4739 | |
| 4740 | // Handle the identifier as the key symbol. |
| 4741 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); |
| 4742 | |
| 4743 | if (getLexer().isNot(AsmToken::Comma)) |
| 4744 | return TokError("unexpected token in directive"); |
| 4745 | Lex(); |
| 4746 | |
| 4747 | int64_t Size; |
| 4748 | SMLoc SizeLoc = getLexer().getLoc(); |
| 4749 | if (parseAbsoluteExpression(Size)) |
| 4750 | return true; |
| 4751 | |
| 4752 | int64_t Pow2Alignment = 0; |
| 4753 | SMLoc Pow2AlignmentLoc; |
| 4754 | if (getLexer().is(AsmToken::Comma)) { |
| 4755 | Lex(); |
| 4756 | Pow2AlignmentLoc = getLexer().getLoc(); |
| 4757 | if (parseAbsoluteExpression(Pow2Alignment)) |
| 4758 | return true; |
| 4759 | |
| 4760 | LCOMM::LCOMMType LCOMM = Lexer.getMAI().getLCOMMDirectiveAlignmentType(); |
| 4761 | if (IsLocal && LCOMM == LCOMM::NoAlignment) |
| 4762 | return Error(Pow2AlignmentLoc, "alignment not supported on this target"); |
| 4763 | |
| 4764 | // If this target takes alignments in bytes (not log) validate and convert. |
| 4765 | if ((!IsLocal && Lexer.getMAI().getCOMMDirectiveAlignmentIsInBytes()) || |
| 4766 | (IsLocal && LCOMM == LCOMM::ByteAlignment)) { |
| 4767 | if (!isPowerOf2_64(Pow2Alignment)) |
| 4768 | return Error(Pow2AlignmentLoc, "alignment must be a power of 2"); |
| 4769 | Pow2Alignment = Log2_64(Pow2Alignment); |
| 4770 | } |
| 4771 | } |
| 4772 | |
| 4773 | if (parseToken(AsmToken::EndOfStatement, |
| 4774 | "unexpected token in '.comm' or '.lcomm' directive")) |
| 4775 | return true; |
| 4776 | |
| 4777 | // NOTE: a size of zero for a .comm should create a undefined symbol |
| 4778 | // but a size of .lcomm creates a bss symbol of size zero. |
| 4779 | if (Size < 0) |
| 4780 | return Error(SizeLoc, "invalid '.comm' or '.lcomm' directive size, can't " |
| 4781 | "be less than zero"); |
| 4782 | |
| 4783 | // NOTE: The alignment in the directive is a power of 2 value, the assembler |
| 4784 | // may internally end up wanting an alignment in bytes. |
| 4785 | // FIXME: Diagnose overflow. |
| 4786 | if (Pow2Alignment < 0) |
| 4787 | return Error(Pow2AlignmentLoc, "invalid '.comm' or '.lcomm' directive " |
| 4788 | "alignment, can't be less than zero"); |
| 4789 | |
| 4790 | Sym->redefineIfPossible(); |
| 4791 | if (!Sym->isUndefined()) |
| 4792 | return Error(IDLoc, "invalid symbol redefinition"); |
| 4793 | |
| 4794 | // Create the Symbol as a common or local common with Size and Pow2Alignment |
| 4795 | if (IsLocal) { |
| 4796 | getStreamer().EmitLocalCommonSymbol(Sym, Size, 1 << Pow2Alignment); |
| 4797 | return false; |
| 4798 | } |
| 4799 | |
| 4800 | getStreamer().EmitCommonSymbol(Sym, Size, 1 << Pow2Alignment); |
| 4801 | return false; |
| 4802 | } |
| 4803 | |
| 4804 | /// parseDirectiveAbort |
| 4805 | /// ::= .abort [... message ...] |
| 4806 | bool AsmParser::parseDirectiveAbort() { |
| 4807 | // FIXME: Use loc from directive. |
| 4808 | SMLoc Loc = getLexer().getLoc(); |
| 4809 | |
| 4810 | StringRef Str = parseStringToEndOfStatement(); |
| 4811 | if (parseToken(AsmToken::EndOfStatement, |
| 4812 | "unexpected token in '.abort' directive")) |
| 4813 | return true; |
| 4814 | |
| 4815 | if (Str.empty()) |
| 4816 | return Error(Loc, ".abort detected. Assembly stopping."); |
| 4817 | else |
| 4818 | return Error(Loc, ".abort '" + Str + "' detected. Assembly stopping."); |
| 4819 | // FIXME: Actually abort assembly here. |
| 4820 | |
| 4821 | return false; |
| 4822 | } |
| 4823 | |
| 4824 | /// parseDirectiveInclude |
| 4825 | /// ::= .include "filename" |
| 4826 | bool AsmParser::parseDirectiveInclude() { |
| 4827 | // Allow the strings to have escaped octal character sequence. |
| 4828 | std::string Filename; |
| 4829 | SMLoc IncludeLoc = getTok().getLoc(); |
| 4830 | |
| 4831 | if (check(getTok().isNot(AsmToken::String), |
| 4832 | "expected string in '.include' directive") || |
| 4833 | parseEscapedString(Filename) || |
| 4834 | check(getTok().isNot(AsmToken::EndOfStatement), |
| 4835 | "unexpected token in '.include' directive") || |
| 4836 | // Attempt to switch the lexer to the included file before consuming the |
| 4837 | // end of statement to avoid losing it when we switch. |
| 4838 | check(enterIncludeFile(Filename), IncludeLoc, |
| 4839 | "Could not find include file '" + Filename + "'")) |
| 4840 | return true; |
| 4841 | |
| 4842 | return false; |
| 4843 | } |
| 4844 | |
| 4845 | /// parseDirectiveIncbin |
| 4846 | /// ::= .incbin "filename" [ , skip [ , count ] ] |
| 4847 | bool AsmParser::parseDirectiveIncbin() { |
| 4848 | // Allow the strings to have escaped octal character sequence. |
| 4849 | std::string Filename; |
| 4850 | SMLoc IncbinLoc = getTok().getLoc(); |
| 4851 | if (check(getTok().isNot(AsmToken::String), |
| 4852 | "expected string in '.incbin' directive") || |
| 4853 | parseEscapedString(Filename)) |
| 4854 | return true; |
| 4855 | |
| 4856 | int64_t Skip = 0; |
| 4857 | const MCExpr *Count = nullptr; |
| 4858 | SMLoc SkipLoc, CountLoc; |
| 4859 | if (parseOptionalToken(AsmToken::Comma)) { |
| 4860 | // The skip expression can be omitted while specifying the count, e.g: |
| 4861 | // .incbin "filename",,4 |
| 4862 | if (getTok().isNot(AsmToken::Comma)) { |
| 4863 | if (parseTokenLoc(SkipLoc) || parseAbsoluteExpression(Skip)) |
| 4864 | return true; |
| 4865 | } |
| 4866 | if (parseOptionalToken(AsmToken::Comma)) { |
| 4867 | CountLoc = getTok().getLoc(); |
| 4868 | if (parseExpression(Count)) |
| 4869 | return true; |
| 4870 | } |
| 4871 | } |
| 4872 | |
| 4873 | if (parseToken(AsmToken::EndOfStatement, |
| 4874 | "unexpected token in '.incbin' directive")) |
| 4875 | return true; |
| 4876 | |
| 4877 | if (check(Skip < 0, SkipLoc, "skip is negative")) |
| 4878 | return true; |
| 4879 | |
| 4880 | // Attempt to process the included file. |
| 4881 | if (processIncbinFile(Filename, Skip, Count, CountLoc)) |
| 4882 | return Error(IncbinLoc, "Could not find incbin file '" + Filename + "'"); |
| 4883 | return false; |
| 4884 | } |
| 4885 | |
| 4886 | /// parseDirectiveIf |
| 4887 | /// ::= .if{,eq,ge,gt,le,lt,ne} expression |
| 4888 | bool AsmParser::parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind) { |
| 4889 | TheCondStack.push_back(TheCondState); |
| 4890 | TheCondState.TheCond = AsmCond::IfCond; |
| 4891 | if (TheCondState.Ignore) { |
| 4892 | eatToEndOfStatement(); |
| 4893 | } else { |
| 4894 | int64_t ExprValue; |
| 4895 | if (parseAbsoluteExpression(ExprValue) || |
| 4896 | parseToken(AsmToken::EndOfStatement, |
| 4897 | "unexpected token in '.if' directive")) |
| 4898 | return true; |
| 4899 | |
| 4900 | switch (DirKind) { |
| 4901 | default: |
| 4902 | llvm_unreachable("unsupported directive")::llvm::llvm_unreachable_internal("unsupported directive", "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 4902); |
| 4903 | case DK_IF: |
| 4904 | case DK_IFNE: |
| 4905 | break; |
| 4906 | case DK_IFEQ: |
| 4907 | ExprValue = ExprValue == 0; |
| 4908 | break; |
| 4909 | case DK_IFGE: |
| 4910 | ExprValue = ExprValue >= 0; |
| 4911 | break; |
| 4912 | case DK_IFGT: |
| 4913 | ExprValue = ExprValue > 0; |
| 4914 | break; |
| 4915 | case DK_IFLE: |
| 4916 | ExprValue = ExprValue <= 0; |
| 4917 | break; |
| 4918 | case DK_IFLT: |
| 4919 | ExprValue = ExprValue < 0; |
| 4920 | break; |
| 4921 | } |
| 4922 | |
| 4923 | TheCondState.CondMet = ExprValue; |
| 4924 | TheCondState.Ignore = !TheCondState.CondMet; |
| 4925 | } |
| 4926 | |
| 4927 | return false; |
| 4928 | } |
| 4929 | |
| 4930 | /// parseDirectiveIfb |
| 4931 | /// ::= .ifb string |
| 4932 | bool AsmParser::parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) { |
| 4933 | TheCondStack.push_back(TheCondState); |
| 4934 | TheCondState.TheCond = AsmCond::IfCond; |
| 4935 | |
| 4936 | if (TheCondState.Ignore) { |
| 4937 | eatToEndOfStatement(); |
| 4938 | } else { |
| 4939 | StringRef Str = parseStringToEndOfStatement(); |
| 4940 | |
| 4941 | if (parseToken(AsmToken::EndOfStatement, |
| 4942 | "unexpected token in '.ifb' directive")) |
| 4943 | return true; |
| 4944 | |
| 4945 | TheCondState.CondMet = ExpectBlank == Str.empty(); |
| 4946 | TheCondState.Ignore = !TheCondState.CondMet; |
| 4947 | } |
| 4948 | |
| 4949 | return false; |
| 4950 | } |
| 4951 | |
| 4952 | /// parseDirectiveIfc |
| 4953 | /// ::= .ifc string1, string2 |
| 4954 | /// ::= .ifnc string1, string2 |
| 4955 | bool AsmParser::parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) { |
| 4956 | TheCondStack.push_back(TheCondState); |
| 4957 | TheCondState.TheCond = AsmCond::IfCond; |
| 4958 | |
| 4959 | if (TheCondState.Ignore) { |
| 4960 | eatToEndOfStatement(); |
| 4961 | } else { |
| 4962 | StringRef Str1 = parseStringToComma(); |
| 4963 | |
| 4964 | if (parseToken(AsmToken::Comma, "unexpected token in '.ifc' directive")) |
| 4965 | return true; |
| 4966 | |
| 4967 | StringRef Str2 = parseStringToEndOfStatement(); |
| 4968 | |
| 4969 | if (parseToken(AsmToken::EndOfStatement, |
| 4970 | "unexpected token in '.ifc' directive")) |
| 4971 | return true; |
| 4972 | |
| 4973 | TheCondState.CondMet = ExpectEqual == (Str1.trim() == Str2.trim()); |
| 4974 | TheCondState.Ignore = !TheCondState.CondMet; |
| 4975 | } |
| 4976 | |
| 4977 | return false; |
| 4978 | } |
| 4979 | |
| 4980 | /// parseDirectiveIfeqs |
| 4981 | /// ::= .ifeqs string1, string2 |
| 4982 | bool AsmParser::parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual) { |
| 4983 | if (Lexer.isNot(AsmToken::String)) { |
| 4984 | if (ExpectEqual) |
| 4985 | return TokError("expected string parameter for '.ifeqs' directive"); |
| 4986 | return TokError("expected string parameter for '.ifnes' directive"); |
| 4987 | } |
| 4988 | |
| 4989 | StringRef String1 = getTok().getStringContents(); |
| 4990 | Lex(); |
| 4991 | |
| 4992 | if (Lexer.isNot(AsmToken::Comma)) { |
| 4993 | if (ExpectEqual) |
| 4994 | return TokError( |
| 4995 | "expected comma after first string for '.ifeqs' directive"); |
| 4996 | return TokError("expected comma after first string for '.ifnes' directive"); |
| 4997 | } |
| 4998 | |
| 4999 | Lex(); |
| 5000 | |
| 5001 | if (Lexer.isNot(AsmToken::String)) { |
| 5002 | if (ExpectEqual) |
| 5003 | return TokError("expected string parameter for '.ifeqs' directive"); |
| 5004 | return TokError("expected string parameter for '.ifnes' directive"); |
| 5005 | } |
| 5006 | |
| 5007 | StringRef String2 = getTok().getStringContents(); |
| 5008 | Lex(); |
| 5009 | |
| 5010 | TheCondStack.push_back(TheCondState); |
| 5011 | TheCondState.TheCond = AsmCond::IfCond; |
| 5012 | TheCondState.CondMet = ExpectEqual == (String1 == String2); |
| 5013 | TheCondState.Ignore = !TheCondState.CondMet; |
| 5014 | |
| 5015 | return false; |
| 5016 | } |
| 5017 | |
| 5018 | /// parseDirectiveIfdef |
| 5019 | /// ::= .ifdef symbol |
| 5020 | bool AsmParser::parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) { |
| 5021 | StringRef Name; |
| 5022 | TheCondStack.push_back(TheCondState); |
| 5023 | TheCondState.TheCond = AsmCond::IfCond; |
| 5024 | |
| 5025 | if (TheCondState.Ignore) { |
| 5026 | eatToEndOfStatement(); |
| 5027 | } else { |
| 5028 | if (check(parseIdentifier(Name), "expected identifier after '.ifdef'") || |
| 5029 | parseToken(AsmToken::EndOfStatement, "unexpected token in '.ifdef'")) |
| 5030 | return true; |
| 5031 | |
| 5032 | MCSymbol *Sym = getContext().lookupSymbol(Name); |
| 5033 | |
| 5034 | if (expect_defined) |
| 5035 | TheCondState.CondMet = (Sym && !Sym->isUndefined()); |
| 5036 | else |
| 5037 | TheCondState.CondMet = (!Sym || Sym->isUndefined()); |
| 5038 | TheCondState.Ignore = !TheCondState.CondMet; |
| 5039 | } |
| 5040 | |
| 5041 | return false; |
| 5042 | } |
| 5043 | |
| 5044 | /// parseDirectiveElseIf |
| 5045 | /// ::= .elseif expression |
| 5046 | bool AsmParser::parseDirectiveElseIf(SMLoc DirectiveLoc) { |
| 5047 | if (TheCondState.TheCond != AsmCond::IfCond && |
| 5048 | TheCondState.TheCond != AsmCond::ElseIfCond) |
| 5049 | return Error(DirectiveLoc, "Encountered a .elseif that doesn't follow an" |
| 5050 | " .if or an .elseif"); |
| 5051 | TheCondState.TheCond = AsmCond::ElseIfCond; |
| 5052 | |
| 5053 | bool LastIgnoreState = false; |
| 5054 | if (!TheCondStack.empty()) |
| 5055 | LastIgnoreState = TheCondStack.back().Ignore; |
| 5056 | if (LastIgnoreState || TheCondState.CondMet) { |
| 5057 | TheCondState.Ignore = true; |
| 5058 | eatToEndOfStatement(); |
| 5059 | } else { |
| 5060 | int64_t ExprValue; |
| 5061 | if (parseAbsoluteExpression(ExprValue)) |
| 5062 | return true; |
| 5063 | |
| 5064 | if (parseToken(AsmToken::EndOfStatement, |
| 5065 | "unexpected token in '.elseif' directive")) |
| 5066 | return true; |
| 5067 | |
| 5068 | TheCondState.CondMet = ExprValue; |
| 5069 | TheCondState.Ignore = !TheCondState.CondMet; |
| 5070 | } |
| 5071 | |
| 5072 | return false; |
| 5073 | } |
| 5074 | |
| 5075 | /// parseDirectiveElse |
| 5076 | /// ::= .else |
| 5077 | bool AsmParser::parseDirectiveElse(SMLoc DirectiveLoc) { |
| 5078 | if (parseToken(AsmToken::EndOfStatement, |
| 5079 | "unexpected token in '.else' directive")) |
| 5080 | return true; |
| 5081 | |
| 5082 | if (TheCondState.TheCond != AsmCond::IfCond && |
| 5083 | TheCondState.TheCond != AsmCond::ElseIfCond) |
| 5084 | return Error(DirectiveLoc, "Encountered a .else that doesn't follow " |
| 5085 | " an .if or an .elseif"); |
| 5086 | TheCondState.TheCond = AsmCond::ElseCond; |
| 5087 | bool LastIgnoreState = false; |
| 5088 | if (!TheCondStack.empty()) |
| 5089 | LastIgnoreState = TheCondStack.back().Ignore; |
| 5090 | if (LastIgnoreState || TheCondState.CondMet) |
| 5091 | TheCondState.Ignore = true; |
| 5092 | else |
| 5093 | TheCondState.Ignore = false; |
| 5094 | |
| 5095 | return false; |
| 5096 | } |
| 5097 | |
| 5098 | /// parseDirectiveEnd |
| 5099 | /// ::= .end |
| 5100 | bool AsmParser::parseDirectiveEnd(SMLoc DirectiveLoc) { |
| 5101 | if (parseToken(AsmToken::EndOfStatement, |
| 5102 | "unexpected token in '.end' directive")) |
| 5103 | return true; |
| 5104 | |
| 5105 | while (Lexer.isNot(AsmToken::Eof)) |
| 5106 | Lexer.Lex(); |
| 5107 | |
| 5108 | return false; |
| 5109 | } |
| 5110 | |
| 5111 | /// parseDirectiveError |
| 5112 | /// ::= .err |
| 5113 | /// ::= .error [string] |
| 5114 | bool AsmParser::parseDirectiveError(SMLoc L, bool WithMessage) { |
| 5115 | if (!TheCondStack.empty()) { |
| 5116 | if (TheCondStack.back().Ignore) { |
| 5117 | eatToEndOfStatement(); |
| 5118 | return false; |
| 5119 | } |
| 5120 | } |
| 5121 | |
| 5122 | if (!WithMessage) |
| 5123 | return Error(L, ".err encountered"); |
| 5124 | |
| 5125 | StringRef Message = ".error directive invoked in source file"; |
| 5126 | if (Lexer.isNot(AsmToken::EndOfStatement)) { |
| 5127 | if (Lexer.isNot(AsmToken::String)) |
| 5128 | return TokError(".error argument must be a string"); |
| 5129 | |
| 5130 | Message = getTok().getStringContents(); |
| 5131 | Lex(); |
| 5132 | } |
| 5133 | |
| 5134 | return Error(L, Message); |
| 5135 | } |
| 5136 | |
| 5137 | /// parseDirectiveWarning |
| 5138 | /// ::= .warning [string] |
| 5139 | bool AsmParser::parseDirectiveWarning(SMLoc L) { |
| 5140 | if (!TheCondStack.empty()) { |
| 5141 | if (TheCondStack.back().Ignore) { |
| 5142 | eatToEndOfStatement(); |
| 5143 | return false; |
| 5144 | } |
| 5145 | } |
| 5146 | |
| 5147 | StringRef Message = ".warning directive invoked in source file"; |
| 5148 | |
| 5149 | if (!parseOptionalToken(AsmToken::EndOfStatement)) { |
| 5150 | if (Lexer.isNot(AsmToken::String)) |
| 5151 | return TokError(".warning argument must be a string"); |
| 5152 | |
| 5153 | Message = getTok().getStringContents(); |
| 5154 | Lex(); |
| 5155 | if (parseToken(AsmToken::EndOfStatement, |
| 5156 | "expected end of statement in '.warning' directive")) |
| 5157 | return true; |
| 5158 | } |
| 5159 | |
| 5160 | return Warning(L, Message); |
| 5161 | } |
| 5162 | |
| 5163 | /// parseDirectiveEndIf |
| 5164 | /// ::= .endif |
| 5165 | bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) { |
| 5166 | if (parseToken(AsmToken::EndOfStatement, |
| 5167 | "unexpected token in '.endif' directive")) |
| 5168 | return true; |
| 5169 | |
| 5170 | if ((TheCondState.TheCond == AsmCond::NoCond) || TheCondStack.empty()) |
| 5171 | return Error(DirectiveLoc, "Encountered a .endif that doesn't follow " |
| 5172 | "an .if or .else"); |
| 5173 | if (!TheCondStack.empty()) { |
| 5174 | TheCondState = TheCondStack.back(); |
| 5175 | TheCondStack.pop_back(); |
| 5176 | } |
| 5177 | |
| 5178 | return false; |
| 5179 | } |
| 5180 | |
| 5181 | void AsmParser::initializeDirectiveKindMap() { |
| 5182 | DirectiveKindMap[".set"] = DK_SET; |
| 5183 | DirectiveKindMap[".equ"] = DK_EQU; |
| 5184 | DirectiveKindMap[".equiv"] = DK_EQUIV; |
| 5185 | DirectiveKindMap[".ascii"] = DK_ASCII; |
| 5186 | DirectiveKindMap[".asciz"] = DK_ASCIZ; |
| 5187 | DirectiveKindMap[".string"] = DK_STRING; |
| 5188 | DirectiveKindMap[".byte"] = DK_BYTE; |
| 5189 | DirectiveKindMap[".short"] = DK_SHORT; |
| 5190 | DirectiveKindMap[".value"] = DK_VALUE; |
| 5191 | DirectiveKindMap[".2byte"] = DK_2BYTE; |
| 5192 | DirectiveKindMap[".long"] = DK_LONG; |
| 5193 | DirectiveKindMap[".int"] = DK_INT; |
| 5194 | DirectiveKindMap[".4byte"] = DK_4BYTE; |
| 5195 | DirectiveKindMap[".quad"] = DK_QUAD; |
| 5196 | DirectiveKindMap[".8byte"] = DK_8BYTE; |
| 5197 | DirectiveKindMap[".octa"] = DK_OCTA; |
| 5198 | DirectiveKindMap[".single"] = DK_SINGLE; |
| 5199 | DirectiveKindMap[".float"] = DK_FLOAT; |
| 5200 | DirectiveKindMap[".double"] = DK_DOUBLE; |
| 5201 | DirectiveKindMap[".align"] = DK_ALIGN; |
| 5202 | DirectiveKindMap[".align32"] = DK_ALIGN32; |
| 5203 | DirectiveKindMap[".balign"] = DK_BALIGN; |
| 5204 | DirectiveKindMap[".balignw"] = DK_BALIGNW; |
| 5205 | DirectiveKindMap[".balignl"] = DK_BALIGNL; |
| 5206 | DirectiveKindMap[".p2align"] = DK_P2ALIGN; |
| 5207 | DirectiveKindMap[".p2alignw"] = DK_P2ALIGNW; |
| 5208 | DirectiveKindMap[".p2alignl"] = DK_P2ALIGNL; |
| 5209 | DirectiveKindMap[".org"] = DK_ORG; |
| 5210 | DirectiveKindMap[".fill"] = DK_FILL; |
| 5211 | DirectiveKindMap[".zero"] = DK_ZERO; |
| 5212 | DirectiveKindMap[".extern"] = DK_EXTERN; |
| 5213 | DirectiveKindMap[".globl"] = DK_GLOBL; |
| 5214 | DirectiveKindMap[".global"] = DK_GLOBAL; |
| 5215 | DirectiveKindMap[".lazy_reference"] = DK_LAZY_REFERENCE; |
| 5216 | DirectiveKindMap[".no_dead_strip"] = DK_NO_DEAD_STRIP; |
| 5217 | DirectiveKindMap[".symbol_resolver"] = DK_SYMBOL_RESOLVER; |
| 5218 | DirectiveKindMap[".private_extern"] = DK_PRIVATE_EXTERN; |
| 5219 | DirectiveKindMap[".reference"] = DK_REFERENCE; |
| 5220 | DirectiveKindMap[".weak_definition"] = DK_WEAK_DEFINITION; |
| 5221 | DirectiveKindMap[".weak_reference"] = DK_WEAK_REFERENCE; |
| 5222 | DirectiveKindMap[".weak_def_can_be_hidden"] = DK_WEAK_DEF_CAN_BE_HIDDEN; |
| 5223 | DirectiveKindMap[".comm"] = DK_COMM; |
| 5224 | DirectiveKindMap[".common"] = DK_COMMON; |
| 5225 | DirectiveKindMap[".lcomm"] = DK_LCOMM; |
| 5226 | DirectiveKindMap[".abort"] = DK_ABORT; |
| 5227 | DirectiveKindMap[".include"] = DK_INCLUDE; |
| 5228 | DirectiveKindMap[".incbin"] = DK_INCBIN; |
| 5229 | DirectiveKindMap[".code16"] = DK_CODE16; |
| 5230 | DirectiveKindMap[".code16gcc"] = DK_CODE16GCC; |
| 5231 | DirectiveKindMap[".rept"] = DK_REPT; |
| 5232 | DirectiveKindMap[".rep"] = DK_REPT; |
| 5233 | DirectiveKindMap[".irp"] = DK_IRP; |
| 5234 | DirectiveKindMap[".irpc"] = DK_IRPC; |
| 5235 | DirectiveKindMap[".endr"] = DK_ENDR; |
| 5236 | DirectiveKindMap[".bundle_align_mode"] = DK_BUNDLE_ALIGN_MODE; |
| 5237 | DirectiveKindMap[".bundle_lock"] = DK_BUNDLE_LOCK; |
| 5238 | DirectiveKindMap[".bundle_unlock"] = DK_BUNDLE_UNLOCK; |
| 5239 | DirectiveKindMap[".if"] = DK_IF; |
| 5240 | DirectiveKindMap[".ifeq"] = DK_IFEQ; |
| 5241 | DirectiveKindMap[".ifge"] = DK_IFGE; |
| 5242 | DirectiveKindMap[".ifgt"] = DK_IFGT; |
| 5243 | DirectiveKindMap[".ifle"] = DK_IFLE; |
| 5244 | DirectiveKindMap[".iflt"] = DK_IFLT; |
| 5245 | DirectiveKindMap[".ifne"] = DK_IFNE; |
| 5246 | DirectiveKindMap[".ifb"] = DK_IFB; |
| 5247 | DirectiveKindMap[".ifnb"] = DK_IFNB; |
| 5248 | DirectiveKindMap[".ifc"] = DK_IFC; |
| 5249 | DirectiveKindMap[".ifeqs"] = DK_IFEQS; |
| 5250 | DirectiveKindMap[".ifnc"] = DK_IFNC; |
| 5251 | DirectiveKindMap[".ifnes"] = DK_IFNES; |
| 5252 | DirectiveKindMap[".ifdef"] = DK_IFDEF; |
| 5253 | DirectiveKindMap[".ifndef"] = DK_IFNDEF; |
| 5254 | DirectiveKindMap[".ifnotdef"] = DK_IFNOTDEF; |
| 5255 | DirectiveKindMap[".elseif"] = DK_ELSEIF; |
| 5256 | DirectiveKindMap[".else"] = DK_ELSE; |
| 5257 | DirectiveKindMap[".end"] = DK_END; |
| 5258 | DirectiveKindMap[".endif"] = DK_ENDIF; |
| 5259 | DirectiveKindMap[".skip"] = DK_SKIP; |
| 5260 | DirectiveKindMap[".space"] = DK_SPACE; |
| 5261 | DirectiveKindMap[".file"] = DK_FILE; |
| 5262 | DirectiveKindMap[".line"] = DK_LINE; |
| 5263 | DirectiveKindMap[".loc"] = DK_LOC; |
| 5264 | DirectiveKindMap[".stabs"] = DK_STABS; |
| 5265 | DirectiveKindMap[".cv_file"] = DK_CV_FILE; |
| 5266 | DirectiveKindMap[".cv_func_id"] = DK_CV_FUNC_ID; |
| 5267 | DirectiveKindMap[".cv_loc"] = DK_CV_LOC; |
| 5268 | DirectiveKindMap[".cv_linetable"] = DK_CV_LINETABLE; |
| 5269 | DirectiveKindMap[".cv_inline_linetable"] = DK_CV_INLINE_LINETABLE; |
| 5270 | DirectiveKindMap[".cv_inline_site_id"] = DK_CV_INLINE_SITE_ID; |
| 5271 | DirectiveKindMap[".cv_def_range"] = DK_CV_DEF_RANGE; |
| 5272 | DirectiveKindMap[".cv_string"] = DK_CV_STRING; |
| 5273 | DirectiveKindMap[".cv_stringtable"] = DK_CV_STRINGTABLE; |
| 5274 | DirectiveKindMap[".cv_filechecksums"] = DK_CV_FILECHECKSUMS; |
| 5275 | DirectiveKindMap[".cv_filechecksumoffset"] = DK_CV_FILECHECKSUM_OFFSET; |
| 5276 | DirectiveKindMap[".cv_fpo_data"] = DK_CV_FPO_DATA; |
| 5277 | DirectiveKindMap[".sleb128"] = DK_SLEB128; |
| 5278 | DirectiveKindMap[".uleb128"] = DK_ULEB128; |
| 5279 | DirectiveKindMap[".cfi_sections"] = DK_CFI_SECTIONS; |
| 5280 | DirectiveKindMap[".cfi_startproc"] = DK_CFI_STARTPROC; |
| 5281 | DirectiveKindMap[".cfi_endproc"] = DK_CFI_ENDPROC; |
| 5282 | DirectiveKindMap[".cfi_def_cfa"] = DK_CFI_DEF_CFA; |
| 5283 | DirectiveKindMap[".cfi_def_cfa_offset"] = DK_CFI_DEF_CFA_OFFSET; |
| 5284 | DirectiveKindMap[".cfi_adjust_cfa_offset"] = DK_CFI_ADJUST_CFA_OFFSET; |
| 5285 | DirectiveKindMap[".cfi_def_cfa_register"] = DK_CFI_DEF_CFA_REGISTER; |
| 5286 | DirectiveKindMap[".cfi_offset"] = DK_CFI_OFFSET; |
| 5287 | DirectiveKindMap[".cfi_rel_offset"] = DK_CFI_REL_OFFSET; |
| 5288 | DirectiveKindMap[".cfi_personality"] = DK_CFI_PERSONALITY; |
| 5289 | DirectiveKindMap[".cfi_lsda"] = DK_CFI_LSDA; |
| 5290 | DirectiveKindMap[".cfi_remember_state"] = DK_CFI_REMEMBER_STATE; |
| 5291 | DirectiveKindMap[".cfi_restore_state"] = DK_CFI_RESTORE_STATE; |
| 5292 | DirectiveKindMap[".cfi_same_value"] = DK_CFI_SAME_VALUE; |
| 5293 | DirectiveKindMap[".cfi_restore"] = DK_CFI_RESTORE; |
| 5294 | DirectiveKindMap[".cfi_escape"] = DK_CFI_ESCAPE; |
| 5295 | DirectiveKindMap[".cfi_return_column"] = DK_CFI_RETURN_COLUMN; |
| 5296 | DirectiveKindMap[".cfi_signal_frame"] = DK_CFI_SIGNAL_FRAME; |
| 5297 | DirectiveKindMap[".cfi_undefined"] = DK_CFI_UNDEFINED; |
| 5298 | DirectiveKindMap[".cfi_register"] = DK_CFI_REGISTER; |
| 5299 | DirectiveKindMap[".cfi_window_save"] = DK_CFI_WINDOW_SAVE; |
| 5300 | DirectiveKindMap[".cfi_b_key_frame"] = DK_CFI_B_KEY_FRAME; |
| 5301 | DirectiveKindMap[".macros_on"] = DK_MACROS_ON; |
| 5302 | DirectiveKindMap[".macros_off"] = DK_MACROS_OFF; |
| 5303 | DirectiveKindMap[".macro"] = DK_MACRO; |
| 5304 | DirectiveKindMap[".exitm"] = DK_EXITM; |
| 5305 | DirectiveKindMap[".endm"] = DK_ENDM; |
| 5306 | DirectiveKindMap[".endmacro"] = DK_ENDMACRO; |
| 5307 | DirectiveKindMap[".purgem"] = DK_PURGEM; |
| 5308 | DirectiveKindMap[".err"] = DK_ERR; |
| 5309 | DirectiveKindMap[".error"] = DK_ERROR; |
| 5310 | DirectiveKindMap[".warning"] = DK_WARNING; |
| 5311 | DirectiveKindMap[".altmacro"] = DK_ALTMACRO; |
| 5312 | DirectiveKindMap[".noaltmacro"] = DK_NOALTMACRO; |
| 5313 | DirectiveKindMap[".reloc"] = DK_RELOC; |
| 5314 | DirectiveKindMap[".dc"] = DK_DC; |
| 5315 | DirectiveKindMap[".dc.a"] = DK_DC_A; |
| 5316 | DirectiveKindMap[".dc.b"] = DK_DC_B; |
| 5317 | DirectiveKindMap[".dc.d"] = DK_DC_D; |
| 5318 | DirectiveKindMap[".dc.l"] = DK_DC_L; |
| 5319 | DirectiveKindMap[".dc.s"] = DK_DC_S; |
| 5320 | DirectiveKindMap[".dc.w"] = DK_DC_W; |
| 5321 | DirectiveKindMap[".dc.x"] = DK_DC_X; |
| 5322 | DirectiveKindMap[".dcb"] = DK_DCB; |
| 5323 | DirectiveKindMap[".dcb.b"] = DK_DCB_B; |
| 5324 | DirectiveKindMap[".dcb.d"] = DK_DCB_D; |
| 5325 | DirectiveKindMap[".dcb.l"] = DK_DCB_L; |
| 5326 | DirectiveKindMap[".dcb.s"] = DK_DCB_S; |
| 5327 | DirectiveKindMap[".dcb.w"] = DK_DCB_W; |
| 5328 | DirectiveKindMap[".dcb.x"] = DK_DCB_X; |
| 5329 | DirectiveKindMap[".ds"] = DK_DS; |
| 5330 | DirectiveKindMap[".ds.b"] = DK_DS_B; |
| 5331 | DirectiveKindMap[".ds.d"] = DK_DS_D; |
| 5332 | DirectiveKindMap[".ds.l"] = DK_DS_L; |
| 5333 | DirectiveKindMap[".ds.p"] = DK_DS_P; |
| 5334 | DirectiveKindMap[".ds.s"] = DK_DS_S; |
| 5335 | DirectiveKindMap[".ds.w"] = DK_DS_W; |
| 5336 | DirectiveKindMap[".ds.x"] = DK_DS_X; |
| 5337 | DirectiveKindMap[".print"] = DK_PRINT; |
| 5338 | DirectiveKindMap[".addrsig"] = DK_ADDRSIG; |
| 5339 | DirectiveKindMap[".addrsig_sym"] = DK_ADDRSIG_SYM; |
| 5340 | } |
| 5341 | |
| 5342 | MCAsmMacro *AsmParser::parseMacroLikeBody(SMLoc DirectiveLoc) { |
| 5343 | AsmToken EndToken, StartToken = getTok(); |
| 5344 | |
| 5345 | unsigned NestLevel = 0; |
| 5346 | while (true) { |
| 5347 | // Check whether we have reached the end of the file. |
| 5348 | if (getLexer().is(AsmToken::Eof)) { |
| 5349 | printError(DirectiveLoc, "no matching '.endr' in definition"); |
| 5350 | return nullptr; |
| 5351 | } |
| 5352 | |
| 5353 | if (Lexer.is(AsmToken::Identifier) && |
| 5354 | (getTok().getIdentifier() == ".rep" || |
| 5355 | getTok().getIdentifier() == ".rept" || |
| 5356 | getTok().getIdentifier() == ".irp" || |
| 5357 | getTok().getIdentifier() == ".irpc")) { |
| 5358 | ++NestLevel; |
| 5359 | } |
| 5360 | |
| 5361 | // Otherwise, check whether we have reached the .endr. |
| 5362 | if (Lexer.is(AsmToken::Identifier) && getTok().getIdentifier() == ".endr") { |
| 5363 | if (NestLevel == 0) { |
| 5364 | EndToken = getTok(); |
| 5365 | Lex(); |
| 5366 | if (Lexer.isNot(AsmToken::EndOfStatement)) { |
| 5367 | printError(getTok().getLoc(), |
| 5368 | "unexpected token in '.endr' directive"); |
| 5369 | return nullptr; |
| 5370 | } |
| 5371 | break; |
| 5372 | } |
| 5373 | --NestLevel; |
| 5374 | } |
| 5375 | |
| 5376 | // Otherwise, scan till the end of the statement. |
| 5377 | eatToEndOfStatement(); |
| 5378 | } |
| 5379 | |
| 5380 | const char *BodyStart = StartToken.getLoc().getPointer(); |
| 5381 | const char *BodyEnd = EndToken.getLoc().getPointer(); |
| 5382 | StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart); |
| 5383 | |
| 5384 | // We Are Anonymous. |
| 5385 | MacroLikeBodies.emplace_back(StringRef(), Body, MCAsmMacroParameters()); |
| 5386 | return &MacroLikeBodies.back(); |
| 5387 | } |
| 5388 | |
| 5389 | void AsmParser::instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc, |
| 5390 | raw_svector_ostream &OS) { |
| 5391 | OS << ".endr\n"; |
| 5392 | |
| 5393 | std::unique_ptr<MemoryBuffer> Instantiation = |
| 5394 | MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>"); |
| 5395 | |
| 5396 | // Create the macro instantiation object and add to the current macro |
| 5397 | // instantiation stack. |
| 5398 | MacroInstantiation *MI = new MacroInstantiation( |
| 5399 | DirectiveLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()); |
| 5400 | ActiveMacros.push_back(MI); |
| 5401 | |
| 5402 | // Jump to the macro instantiation and prime the lexer. |
| 5403 | CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc()); |
| 5404 | Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer()); |
| 5405 | Lex(); |
| 5406 | } |
| 5407 | |
| 5408 | /// parseDirectiveRept |
| 5409 | /// ::= .rep | .rept count |
| 5410 | bool AsmParser::parseDirectiveRept(SMLoc DirectiveLoc, StringRef Dir) { |
| 5411 | const MCExpr *CountExpr; |
| 5412 | SMLoc CountLoc = getTok().getLoc(); |
| 5413 | if (parseExpression(CountExpr)) |
| 5414 | return true; |
| 5415 | |
| 5416 | int64_t Count; |
| 5417 | if (!CountExpr->evaluateAsAbsolute(Count, getStreamer().getAssemblerPtr())) { |
| 5418 | return Error(CountLoc, "unexpected token in '" + Dir + "' directive"); |
| 5419 | } |
| 5420 | |
| 5421 | if (check(Count < 0, CountLoc, "Count is negative") || |
| 5422 | parseToken(AsmToken::EndOfStatement, |
| 5423 | "unexpected token in '" + Dir + "' directive")) |
| 5424 | return true; |
| 5425 | |
| 5426 | // Lex the rept definition. |
| 5427 | MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc); |
| 5428 | if (!M) |
| 5429 | return true; |
| 5430 | |
| 5431 | // Macro instantiation is lexical, unfortunately. We construct a new buffer |
| 5432 | // to hold the macro body with substitutions. |
| 5433 | SmallString<256> Buf; |
| 5434 | raw_svector_ostream OS(Buf); |
| 5435 | while (Count--) { |
| 5436 | // Note that the AtPseudoVariable is disabled for instantiations of .rep(t). |
| 5437 | if (expandMacro(OS, M->Body, None, None, false, getTok().getLoc())) |
| 5438 | return true; |
| 5439 | } |
| 5440 | instantiateMacroLikeBody(M, DirectiveLoc, OS); |
| 5441 | |
| 5442 | return false; |
| 5443 | } |
| 5444 | |
| 5445 | /// parseDirectiveIrp |
| 5446 | /// ::= .irp symbol,values |
| 5447 | bool AsmParser::parseDirectiveIrp(SMLoc DirectiveLoc) { |
| 5448 | MCAsmMacroParameter Parameter; |
| 5449 | MCAsmMacroArguments A; |
| 5450 | if (check(parseIdentifier(Parameter.Name), |
| 5451 | "expected identifier in '.irp' directive") || |
| 5452 | parseToken(AsmToken::Comma, "expected comma in '.irp' directive") || |
| 5453 | parseMacroArguments(nullptr, A) || |
| 5454 | parseToken(AsmToken::EndOfStatement, "expected End of Statement")) |
| 5455 | return true; |
| 5456 | |
| 5457 | // Lex the irp definition. |
| 5458 | MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc); |
| 5459 | if (!M) |
| 5460 | return true; |
| 5461 | |
| 5462 | // Macro instantiation is lexical, unfortunately. We construct a new buffer |
| 5463 | // to hold the macro body with substitutions. |
| 5464 | SmallString<256> Buf; |
| 5465 | raw_svector_ostream OS(Buf); |
| 5466 | |
| 5467 | for (const MCAsmMacroArgument &Arg : A) { |
| 5468 | // Note that the AtPseudoVariable is enabled for instantiations of .irp. |
| 5469 | // This is undocumented, but GAS seems to support it. |
| 5470 | if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc())) |
| 5471 | return true; |
| 5472 | } |
| 5473 | |
| 5474 | instantiateMacroLikeBody(M, DirectiveLoc, OS); |
| 5475 | |
| 5476 | return false; |
| 5477 | } |
| 5478 | |
| 5479 | /// parseDirectiveIrpc |
| 5480 | /// ::= .irpc symbol,values |
| 5481 | bool AsmParser::parseDirectiveIrpc(SMLoc DirectiveLoc) { |
| 5482 | MCAsmMacroParameter Parameter; |
| 5483 | MCAsmMacroArguments A; |
| 5484 | |
| 5485 | if (check(parseIdentifier(Parameter.Name), |
| 5486 | "expected identifier in '.irpc' directive") || |
| 5487 | parseToken(AsmToken::Comma, "expected comma in '.irpc' directive") || |
| 5488 | parseMacroArguments(nullptr, A)) |
| 5489 | return true; |
| 5490 | |
| 5491 | if (A.size() != 1 || A.front().size() != 1) |
| 5492 | return TokError("unexpected token in '.irpc' directive"); |
| 5493 | |
| 5494 | // Eat the end of statement. |
| 5495 | if (parseToken(AsmToken::EndOfStatement, "expected end of statement")) |
| 5496 | return true; |
| 5497 | |
| 5498 | // Lex the irpc definition. |
| 5499 | MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc); |
| 5500 | if (!M) |
| 5501 | return true; |
| 5502 | |
| 5503 | // Macro instantiation is lexical, unfortunately. We construct a new buffer |
| 5504 | // to hold the macro body with substitutions. |
| 5505 | SmallString<256> Buf; |
| 5506 | raw_svector_ostream OS(Buf); |
| 5507 | |
| 5508 | StringRef Values = A.front().front().getString(); |
| 5509 | for (std::size_t I = 0, End = Values.size(); I != End; ++I) { |
| 5510 | MCAsmMacroArgument Arg; |
| 5511 | Arg.emplace_back(AsmToken::Identifier, Values.slice(I, I + 1)); |
| 5512 | |
| 5513 | // Note that the AtPseudoVariable is enabled for instantiations of .irpc. |
| 5514 | // This is undocumented, but GAS seems to support it. |
| 5515 | if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc())) |
| 5516 | return true; |
| 5517 | } |
| 5518 | |
| 5519 | instantiateMacroLikeBody(M, DirectiveLoc, OS); |
| 5520 | |
| 5521 | return false; |
| 5522 | } |
| 5523 | |
| 5524 | bool AsmParser::parseDirectiveEndr(SMLoc DirectiveLoc) { |
| 5525 | if (ActiveMacros.empty()) |
| 5526 | return TokError("unmatched '.endr' directive"); |
| 5527 | |
| 5528 | // The only .repl that should get here are the ones created by |
| 5529 | // instantiateMacroLikeBody. |
| 5530 | assert(getLexer().is(AsmToken::EndOfStatement))((getLexer().is(AsmToken::EndOfStatement)) ? static_cast<void > (0) : __assert_fail ("getLexer().is(AsmToken::EndOfStatement)" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 5530, __PRETTY_FUNCTION__)); |
| 5531 | |
| 5532 | handleMacroExit(); |
| 5533 | return false; |
| 5534 | } |
| 5535 | |
| 5536 | bool AsmParser::parseDirectiveMSEmit(SMLoc IDLoc, ParseStatementInfo &Info, |
| 5537 | size_t Len) { |
| 5538 | const MCExpr *Value; |
| 5539 | SMLoc ExprLoc = getLexer().getLoc(); |
| 5540 | if (parseExpression(Value)) |
| 5541 | return true; |
| 5542 | const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value); |
| 5543 | if (!MCE) |
| 5544 | return Error(ExprLoc, "unexpected expression in _emit"); |
| 5545 | uint64_t IntValue = MCE->getValue(); |
| 5546 | if (!isUInt<8>(IntValue) && !isInt<8>(IntValue)) |
| 5547 | return Error(ExprLoc, "literal value out of range for directive"); |
| 5548 | |
| 5549 | Info.AsmRewrites->emplace_back(AOK_Emit, IDLoc, Len); |
| 5550 | return false; |
| 5551 | } |
| 5552 | |
| 5553 | bool AsmParser::parseDirectiveMSAlign(SMLoc IDLoc, ParseStatementInfo &Info) { |
| 5554 | const MCExpr *Value; |
| 5555 | SMLoc ExprLoc = getLexer().getLoc(); |
| 5556 | if (parseExpression(Value)) |
| 5557 | return true; |
| 5558 | const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value); |
| 5559 | if (!MCE) |
| 5560 | return Error(ExprLoc, "unexpected expression in align"); |
| 5561 | uint64_t IntValue = MCE->getValue(); |
| 5562 | if (!isPowerOf2_64(IntValue)) |
| 5563 | return Error(ExprLoc, "literal value not a power of two greater then zero"); |
| 5564 | |
| 5565 | Info.AsmRewrites->emplace_back(AOK_Align, IDLoc, 5, Log2_64(IntValue)); |
| 5566 | return false; |
| 5567 | } |
| 5568 | |
| 5569 | bool AsmParser::parseDirectivePrint(SMLoc DirectiveLoc) { |
| 5570 | const AsmToken StrTok = getTok(); |
| 5571 | Lex(); |
| 5572 | if (StrTok.isNot(AsmToken::String) || StrTok.getString().front() != '"') |
| 5573 | return Error(DirectiveLoc, "expected double quoted string after .print"); |
| 5574 | if (parseToken(AsmToken::EndOfStatement, "expected end of statement")) |
| 5575 | return true; |
| 5576 | llvm::outs() << StrTok.getStringContents() << '\n'; |
| 5577 | return false; |
| 5578 | } |
| 5579 | |
| 5580 | bool AsmParser::parseDirectiveAddrsig() { |
| 5581 | getStreamer().EmitAddrsig(); |
| 5582 | return false; |
| 5583 | } |
| 5584 | |
| 5585 | bool AsmParser::parseDirectiveAddrsigSym() { |
| 5586 | StringRef Name; |
| 5587 | if (check(parseIdentifier(Name), |
| 5588 | "expected identifier in '.addrsig_sym' directive")) |
| 5589 | return true; |
| 5590 | MCSymbol *Sym = getContext().getOrCreateSymbol(Name); |
| 5591 | getStreamer().EmitAddrsigSym(Sym); |
| 5592 | return false; |
| 5593 | } |
| 5594 | |
| 5595 | // We are comparing pointers, but the pointers are relative to a single string. |
| 5596 | // Thus, this should always be deterministic. |
| 5597 | static int rewritesSort(const AsmRewrite *AsmRewriteA, |
| 5598 | const AsmRewrite *AsmRewriteB) { |
| 5599 | if (AsmRewriteA->Loc.getPointer() < AsmRewriteB->Loc.getPointer()) |
| 5600 | return -1; |
| 5601 | if (AsmRewriteB->Loc.getPointer() < AsmRewriteA->Loc.getPointer()) |
| 5602 | return 1; |
| 5603 | |
| 5604 | // It's possible to have a SizeDirective, Imm/ImmPrefix and an Input/Output |
| 5605 | // rewrite to the same location. Make sure the SizeDirective rewrite is |
| 5606 | // performed first, then the Imm/ImmPrefix and finally the Input/Output. This |
| 5607 | // ensures the sort algorithm is stable. |
| 5608 | if (AsmRewritePrecedence[AsmRewriteA->Kind] > |
| 5609 | AsmRewritePrecedence[AsmRewriteB->Kind]) |
| 5610 | return -1; |
| 5611 | |
| 5612 | if (AsmRewritePrecedence[AsmRewriteA->Kind] < |
| 5613 | AsmRewritePrecedence[AsmRewriteB->Kind]) |
| 5614 | return 1; |
| 5615 | llvm_unreachable("Unstable rewrite sort.")::llvm::llvm_unreachable_internal("Unstable rewrite sort.", "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 5615); |
| 5616 | } |
| 5617 | |
| 5618 | bool AsmParser::parseMSInlineAsm( |
| 5619 | void *AsmLoc, std::string &AsmString, unsigned &NumOutputs, |
| 5620 | unsigned &NumInputs, SmallVectorImpl<std::pair<void *, bool>> &OpDecls, |
| 5621 | SmallVectorImpl<std::string> &Constraints, |
| 5622 | SmallVectorImpl<std::string> &Clobbers, const MCInstrInfo *MII, |
| 5623 | const MCInstPrinter *IP, MCAsmParserSemaCallback &SI) { |
| 5624 | SmallVector<void *, 4> InputDecls; |
| 5625 | SmallVector<void *, 4> OutputDecls; |
| 5626 | SmallVector<bool, 4> InputDeclsAddressOf; |
| 5627 | SmallVector<bool, 4> OutputDeclsAddressOf; |
| 5628 | SmallVector<std::string, 4> InputConstraints; |
| 5629 | SmallVector<std::string, 4> OutputConstraints; |
| 5630 | SmallVector<unsigned, 4> ClobberRegs; |
| 5631 | |
| 5632 | SmallVector<AsmRewrite, 4> AsmStrRewrites; |
| 5633 | |
| 5634 | // Prime the lexer. |
| 5635 | Lex(); |
| 5636 | |
| 5637 | // While we have input, parse each statement. |
| 5638 | unsigned InputIdx = 0; |
| 5639 | unsigned OutputIdx = 0; |
| 5640 | while (getLexer().isNot(AsmToken::Eof)) { |
| 5641 | // Parse curly braces marking block start/end |
| 5642 | if (parseCurlyBlockScope(AsmStrRewrites)) |
| 5643 | continue; |
| 5644 | |
| 5645 | ParseStatementInfo Info(&AsmStrRewrites); |
| 5646 | bool StatementErr = parseStatement(Info, &SI); |
| 5647 | |
| 5648 | if (StatementErr || Info.ParseError) { |
| 5649 | // Emit pending errors if any exist. |
| 5650 | printPendingErrors(); |
| 5651 | return true; |
| 5652 | } |
| 5653 | |
| 5654 | // No pending error should exist here. |
| 5655 | assert(!hasPendingError() && "unexpected error from parseStatement")((!hasPendingError() && "unexpected error from parseStatement" ) ? static_cast<void> (0) : __assert_fail ("!hasPendingError() && \"unexpected error from parseStatement\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 5655, __PRETTY_FUNCTION__)); |
| 5656 | |
| 5657 | if (Info.Opcode == ~0U) |
| 5658 | continue; |
| 5659 | |
| 5660 | const MCInstrDesc &Desc = MII->get(Info.Opcode); |
| 5661 | |
| 5662 | // Build the list of clobbers, outputs and inputs. |
| 5663 | for (unsigned i = 1, e = Info.ParsedOperands.size(); i != e; ++i) { |
| 5664 | MCParsedAsmOperand &Operand = *Info.ParsedOperands[i]; |
| 5665 | |
| 5666 | // Immediate. |
| 5667 | if (Operand.isImm()) |
| 5668 | continue; |
| 5669 | |
| 5670 | // Register operand. |
| 5671 | if (Operand.isReg() && !Operand.needAddressOf() && |
| 5672 | !getTargetParser().OmitRegisterFromClobberLists(Operand.getReg())) { |
| 5673 | unsigned NumDefs = Desc.getNumDefs(); |
| 5674 | // Clobber. |
| 5675 | if (NumDefs && Operand.getMCOperandNum() < NumDefs) |
| 5676 | ClobberRegs.push_back(Operand.getReg()); |
| 5677 | continue; |
| 5678 | } |
| 5679 | |
| 5680 | // Expr/Input or Output. |
| 5681 | StringRef SymName = Operand.getSymName(); |
| 5682 | if (SymName.empty()) |
| 5683 | continue; |
| 5684 | |
| 5685 | void *OpDecl = Operand.getOpDecl(); |
| 5686 | if (!OpDecl) |
| 5687 | continue; |
| 5688 | |
| 5689 | bool isOutput = (i == 1) && Desc.mayStore(); |
| 5690 | SMLoc Start = SMLoc::getFromPointer(SymName.data()); |
| 5691 | if (isOutput) { |
| 5692 | ++InputIdx; |
| 5693 | OutputDecls.push_back(OpDecl); |
| 5694 | OutputDeclsAddressOf.push_back(Operand.needAddressOf()); |
| 5695 | OutputConstraints.push_back(("=" + Operand.getConstraint()).str()); |
| 5696 | AsmStrRewrites.emplace_back(AOK_Output, Start, SymName.size()); |
| 5697 | } else { |
| 5698 | InputDecls.push_back(OpDecl); |
| 5699 | InputDeclsAddressOf.push_back(Operand.needAddressOf()); |
| 5700 | InputConstraints.push_back(Operand.getConstraint().str()); |
| 5701 | AsmStrRewrites.emplace_back(AOK_Input, Start, SymName.size()); |
| 5702 | } |
| 5703 | } |
| 5704 | |
| 5705 | // Consider implicit defs to be clobbers. Think of cpuid and push. |
| 5706 | ArrayRef<MCPhysReg> ImpDefs(Desc.getImplicitDefs(), |
| 5707 | Desc.getNumImplicitDefs()); |
| 5708 | ClobberRegs.insert(ClobberRegs.end(), ImpDefs.begin(), ImpDefs.end()); |
| 5709 | } |
| 5710 | |
| 5711 | // Set the number of Outputs and Inputs. |
| 5712 | NumOutputs = OutputDecls.size(); |
| 5713 | NumInputs = InputDecls.size(); |
| 5714 | |
| 5715 | // Set the unique clobbers. |
| 5716 | array_pod_sort(ClobberRegs.begin(), ClobberRegs.end()); |
| 5717 | ClobberRegs.erase(std::unique(ClobberRegs.begin(), ClobberRegs.end()), |
| 5718 | ClobberRegs.end()); |
| 5719 | Clobbers.assign(ClobberRegs.size(), std::string()); |
| 5720 | for (unsigned I = 0, E = ClobberRegs.size(); I != E; ++I) { |
| 5721 | raw_string_ostream OS(Clobbers[I]); |
| 5722 | IP->printRegName(OS, ClobberRegs[I]); |
| 5723 | } |
| 5724 | |
| 5725 | // Merge the various outputs and inputs. Output are expected first. |
| 5726 | if (NumOutputs || NumInputs) { |
| 5727 | unsigned NumExprs = NumOutputs + NumInputs; |
| 5728 | OpDecls.resize(NumExprs); |
| 5729 | Constraints.resize(NumExprs); |
| 5730 | for (unsigned i = 0; i < NumOutputs; ++i) { |
| 5731 | OpDecls[i] = std::make_pair(OutputDecls[i], OutputDeclsAddressOf[i]); |
| 5732 | Constraints[i] = OutputConstraints[i]; |
| 5733 | } |
| 5734 | for (unsigned i = 0, j = NumOutputs; i < NumInputs; ++i, ++j) { |
| 5735 | OpDecls[j] = std::make_pair(InputDecls[i], InputDeclsAddressOf[i]); |
| 5736 | Constraints[j] = InputConstraints[i]; |
| 5737 | } |
| 5738 | } |
| 5739 | |
| 5740 | // Build the IR assembly string. |
| 5741 | std::string AsmStringIR; |
| 5742 | raw_string_ostream OS(AsmStringIR); |
| 5743 | StringRef ASMString = |
| 5744 | SrcMgr.getMemoryBuffer(SrcMgr.getMainFileID())->getBuffer(); |
| 5745 | const char *AsmStart = ASMString.begin(); |
| 5746 | const char *AsmEnd = ASMString.end(); |
| 5747 | array_pod_sort(AsmStrRewrites.begin(), AsmStrRewrites.end(), rewritesSort); |
| 5748 | for (const AsmRewrite &AR : AsmStrRewrites) { |
| 5749 | AsmRewriteKind Kind = AR.Kind; |
| 5750 | |
| 5751 | const char *Loc = AR.Loc.getPointer(); |
| 5752 | assert(Loc >= AsmStart && "Expected Loc to be at or after Start!")((Loc >= AsmStart && "Expected Loc to be at or after Start!" ) ? static_cast<void> (0) : __assert_fail ("Loc >= AsmStart && \"Expected Loc to be at or after Start!\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 5752, __PRETTY_FUNCTION__)); |
| 5753 | |
| 5754 | // Emit everything up to the immediate/expression. |
| 5755 | if (unsigned Len = Loc - AsmStart) |
| 5756 | OS << StringRef(AsmStart, Len); |
| 5757 | |
| 5758 | // Skip the original expression. |
| 5759 | if (Kind == AOK_Skip) { |
| 5760 | AsmStart = Loc + AR.Len; |
| 5761 | continue; |
| 5762 | } |
| 5763 | |
| 5764 | unsigned AdditionalSkip = 0; |
| 5765 | // Rewrite expressions in $N notation. |
| 5766 | switch (Kind) { |
| 5767 | default: |
| 5768 | break; |
| 5769 | case AOK_IntelExpr: |
| 5770 | assert(AR.IntelExp.isValid() && "cannot write invalid intel expression")((AR.IntelExp.isValid() && "cannot write invalid intel expression" ) ? static_cast<void> (0) : __assert_fail ("AR.IntelExp.isValid() && \"cannot write invalid intel expression\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 5770, __PRETTY_FUNCTION__)); |
| 5771 | if (AR.IntelExp.NeedBracs) |
| 5772 | OS << "["; |
| 5773 | if (AR.IntelExp.hasBaseReg()) |
| 5774 | OS << AR.IntelExp.BaseReg; |
| 5775 | if (AR.IntelExp.hasIndexReg()) |
| 5776 | OS << (AR.IntelExp.hasBaseReg() ? " + " : "") |
| 5777 | << AR.IntelExp.IndexReg; |
| 5778 | if (AR.IntelExp.Scale > 1) |
| 5779 | OS << " * $$" << AR.IntelExp.Scale; |
| 5780 | if (AR.IntelExp.Imm || !AR.IntelExp.hasRegs()) |
| 5781 | OS << (AR.IntelExp.hasRegs() ? " + $$" : "$$") << AR.IntelExp.Imm; |
| 5782 | if (AR.IntelExp.NeedBracs) |
| 5783 | OS << "]"; |
| 5784 | break; |
| 5785 | case AOK_Label: |
| 5786 | OS << Ctx.getAsmInfo()->getPrivateLabelPrefix() << AR.Label; |
| 5787 | break; |
| 5788 | case AOK_Input: |
| 5789 | OS << '$' << InputIdx++; |
| 5790 | break; |
| 5791 | case AOK_Output: |
| 5792 | OS << '$' << OutputIdx++; |
| 5793 | break; |
| 5794 | case AOK_SizeDirective: |
| 5795 | switch (AR.Val) { |
| 5796 | default: break; |
| 5797 | case 8: OS << "byte ptr "; break; |
| 5798 | case 16: OS << "word ptr "; break; |
| 5799 | case 32: OS << "dword ptr "; break; |
| 5800 | case 64: OS << "qword ptr "; break; |
| 5801 | case 80: OS << "xword ptr "; break; |
| 5802 | case 128: OS << "xmmword ptr "; break; |
| 5803 | case 256: OS << "ymmword ptr "; break; |
| 5804 | } |
| 5805 | break; |
| 5806 | case AOK_Emit: |
| 5807 | OS << ".byte"; |
| 5808 | break; |
| 5809 | case AOK_Align: { |
| 5810 | // MS alignment directives are measured in bytes. If the native assembler |
| 5811 | // measures alignment in bytes, we can pass it straight through. |
| 5812 | OS << ".align"; |
| 5813 | if (getContext().getAsmInfo()->getAlignmentIsInBytes()) |
| 5814 | break; |
| 5815 | |
| 5816 | // Alignment is in log2 form, so print that instead and skip the original |
| 5817 | // immediate. |
| 5818 | unsigned Val = AR.Val; |
| 5819 | OS << ' ' << Val; |
| 5820 | assert(Val < 10 && "Expected alignment less then 2^10.")((Val < 10 && "Expected alignment less then 2^10." ) ? static_cast<void> (0) : __assert_fail ("Val < 10 && \"Expected alignment less then 2^10.\"" , "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 5820, __PRETTY_FUNCTION__)); |
| 5821 | AdditionalSkip = (Val < 4) ? 2 : Val < 7 ? 3 : 4; |
| 5822 | break; |
| 5823 | } |
| 5824 | case AOK_EVEN: |
| 5825 | OS << ".even"; |
| 5826 | break; |
| 5827 | case AOK_EndOfStatement: |
| 5828 | OS << "\n\t"; |
| 5829 | break; |
| 5830 | } |
| 5831 | |
| 5832 | // Skip the original expression. |
| 5833 | AsmStart = Loc + AR.Len + AdditionalSkip; |
| 5834 | } |
| 5835 | |
| 5836 | // Emit the remainder of the asm string. |
| 5837 | if (AsmStart != AsmEnd) |
| 5838 | OS << StringRef(AsmStart, AsmEnd - AsmStart); |
| 5839 | |
| 5840 | AsmString = OS.str(); |
| 5841 | return false; |
| 5842 | } |
| 5843 | |
| 5844 | namespace llvm { |
| 5845 | namespace MCParserUtils { |
| 5846 | |
| 5847 | /// Returns whether the given symbol is used anywhere in the given expression, |
| 5848 | /// or subexpressions. |
| 5849 | static bool isSymbolUsedInExpression(const MCSymbol *Sym, const MCExpr *Value) { |
| 5850 | switch (Value->getKind()) { |
| 5851 | case MCExpr::Binary: { |
| 5852 | const MCBinaryExpr *BE = static_cast<const MCBinaryExpr *>(Value); |
| 5853 | return isSymbolUsedInExpression(Sym, BE->getLHS()) || |
| 5854 | isSymbolUsedInExpression(Sym, BE->getRHS()); |
| 5855 | } |
| 5856 | case MCExpr::Target: |
| 5857 | case MCExpr::Constant: |
| 5858 | return false; |
| 5859 | case MCExpr::SymbolRef: { |
| 5860 | const MCSymbol &S = |
| 5861 | static_cast<const MCSymbolRefExpr *>(Value)->getSymbol(); |
| 5862 | if (S.isVariable()) |
| 5863 | return isSymbolUsedInExpression(Sym, S.getVariableValue()); |
| 5864 | return &S == Sym; |
| 5865 | } |
| 5866 | case MCExpr::Unary: |
| 5867 | return isSymbolUsedInExpression( |
| 5868 | Sym, static_cast<const MCUnaryExpr *>(Value)->getSubExpr()); |
| 5869 | } |
| 5870 | |
| 5871 | llvm_unreachable("Unknown expr kind!")::llvm::llvm_unreachable_internal("Unknown expr kind!", "/build/llvm-toolchain-snapshot-8~svn350071/lib/MC/MCParser/AsmParser.cpp" , 5871); |
| 5872 | } |
| 5873 | |
| 5874 | bool parseAssignmentExpression(StringRef Name, bool allow_redef, |
| 5875 | MCAsmParser &Parser, MCSymbol *&Sym, |
| 5876 | const MCExpr *&Value) { |
| 5877 | |
| 5878 | // FIXME: Use better location, we should use proper tokens. |
| 5879 | SMLoc EqualLoc = Parser.getTok().getLoc(); |
| 5880 | if (Parser.parseExpression(Value)) |
| 5881 | return Parser.TokError("missing expression"); |
| 5882 | |
| 5883 | // Note: we don't count b as used in "a = b". This is to allow |
| 5884 | // a = b |
| 5885 | // b = c |
| 5886 | |
| 5887 | if (Parser.parseToken(AsmToken::EndOfStatement)) |
| 5888 | return true; |
| 5889 | |
| 5890 | // Validate that the LHS is allowed to be a variable (either it has not been |
| 5891 | // used as a symbol, or it is an absolute symbol). |
| 5892 | Sym = Parser.getContext().lookupSymbol(Name); |
| 5893 | if (Sym) { |
| 5894 | // Diagnose assignment to a label. |
| 5895 | // |
| 5896 | // FIXME: Diagnostics. Note the location of the definition as a label. |
| 5897 | // FIXME: Diagnose assignment to protected identifier (e.g., register name). |
| 5898 | if (isSymbolUsedInExpression(Sym, Value)) |
| 5899 | return Parser.Error(EqualLoc, "Recursive use of '" + Name + "'"); |
| 5900 | else if (Sym->isUndefined(/*SetUsed*/ false) && !Sym->isUsed() && |
| 5901 | !Sym->isVariable()) |
| 5902 | ; // Allow redefinitions of undefined symbols only used in directives. |
| 5903 | else if (Sym->isVariable() && !Sym->isUsed() && allow_redef) |
| 5904 | ; // Allow redefinitions of variables that haven't yet been used. |
| 5905 | else if (!Sym->isUndefined() && (!Sym->isVariable() || !allow_redef)) |
| 5906 | return Parser.Error(EqualLoc, "redefinition of '" + Name + "'"); |
| 5907 | else if (!Sym->isVariable()) |
| 5908 | return Parser.Error(EqualLoc, "invalid assignment to '" + Name + "'"); |
| 5909 | else if (!isa<MCConstantExpr>(Sym->getVariableValue())) |
| 5910 | return Parser.Error(EqualLoc, |
| 5911 | "invalid reassignment of non-absolute variable '" + |
| 5912 | Name + "'"); |
| 5913 | } else if (Name == ".") { |
| 5914 | Parser.getStreamer().emitValueToOffset(Value, 0, EqualLoc); |
| 5915 | return false; |
| 5916 | } else |
| 5917 | Sym = Parser.getContext().getOrCreateSymbol(Name); |
| 5918 | |
| 5919 | Sym->setRedefinable(allow_redef); |
| 5920 | |
| 5921 | return false; |
| 5922 | } |
| 5923 | |
| 5924 | } // end namespace MCParserUtils |
| 5925 | } // end namespace llvm |
| 5926 | |
| 5927 | /// Create an MCAsmParser instance. |
| 5928 | MCAsmParser *llvm::createMCAsmParser(SourceMgr &SM, MCContext &C, |
| 5929 | MCStreamer &Out, const MCAsmInfo &MAI, |
| 5930 | unsigned CB) { |
| 5931 | return new AsmParser(SM, C, Out, MAI, CB); |
| 5932 | } |