tools/llvm-mc/AsmParser.cpp

   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 "AsmParser.h"
  15
  16 #include "AsmExpr.h"
  17 #include "llvm/MC/MCContext.h"
  18 #include "llvm/MC/MCInst.h"
  19 #include "llvm/MC/MCStreamer.h"
  20 #include "llvm/MC/MCSymbol.h"
  21 #include "llvm/Support/SourceMgr.h"
  22 #include "llvm/Support/raw_ostream.h"
  23 using namespace llvm;
  24
  25 void AsmParser::Warning(SMLoc L, const char *Msg) {
  26   Lexer.PrintMessage(L, Msg, "warning");
  27 }
  28
  29 bool AsmParser::Error(SMLoc L, const char *Msg) {
  30   Lexer.PrintMessage(L, Msg, "error");
  31   return true;
  32 }
  33
  34 bool AsmParser::TokError(const char *Msg) {
  35   Lexer.PrintMessage(Lexer.getLoc(), Msg, "error");
  36   return true;
  37 }
  38
  39 bool AsmParser::Run() {
  40   // Prime the lexer.
  41   Lexer.Lex();
  42
  43   bool HadError = false;
  44
  45   // While we have input, parse each statement.
  46   while (Lexer.isNot(asmtok::Eof)) {
  47     if (!ParseStatement()) continue;
  48
  49     // If we had an error, remember it and recover by skipping to the next line.
  50     HadError = true;
  51     EatToEndOfStatement();
  52   }
  53
  54   return HadError;
  55 }
  56
  57 /// EatToEndOfStatement - Throw away the rest of the line for testing purposes.
  58 void AsmParser::EatToEndOfStatement() {
  59   while (Lexer.isNot(asmtok::EndOfStatement) &&
  60          Lexer.isNot(asmtok::Eof))
  61     Lexer.Lex();
  62
  63   // Eat EOL.
  64   if (Lexer.is(asmtok::EndOfStatement))
  65     Lexer.Lex();
  66 }
  67
  68
  69 /// ParseParenExpr - Parse a paren expression and return it.
  70 /// NOTE: This assumes the leading '(' has already been consumed.
  71 ///
  72 /// parenexpr ::= expr)
  73 ///
  74 bool AsmParser::ParseParenExpr(AsmExpr *&Res) {
  75   if (ParseExpression(Res)) return true;
  76   if (Lexer.isNot(asmtok::RParen))
  77     return TokError("expected ')' in parentheses expression");
  78   Lexer.Lex();
  79   return false;
  80 }
  81
  82 /// ParsePrimaryExpr - Parse a primary expression and return it.
  83 ///  primaryexpr ::= (parenexpr
  84 ///  primaryexpr ::= symbol
  85 ///  primaryexpr ::= number
  86 ///  primaryexpr ::= ~,+,- primaryexpr
  87 bool AsmParser::ParsePrimaryExpr(AsmExpr *&Res) {
  88   switch (Lexer.getKind()) {
  89   default:
  90     return TokError("unknown token in expression");
  91   case asmtok::Exclaim:
  92     Lexer.Lex(); // Eat the operator.
  93     if (ParsePrimaryExpr(Res))
  94       return true;
  95     Res = new AsmUnaryExpr(AsmUnaryExpr::LNot, Res);
  96     return false;
  97   case asmtok::Identifier: {
  98     // This is a label, this should be parsed as part of an expression, to
  99     // handle things like LFOO+4.
 100     MCSymbol *Sym = Ctx.GetOrCreateSymbol(Lexer.getCurStrVal());
 101
 102     // If this is use of an undefined symbol then mark it external.
 103     if (!Sym->getSection() && !Ctx.GetSymbolValue(Sym))
 104       Sym->setExternal(true);
 105
 106     Res = new AsmSymbolRefExpr(Sym);
 107     Lexer.Lex(); // Eat identifier.
 108     return false;
 109   }
 110   case asmtok::IntVal:
 111     Res = new AsmConstantExpr(Lexer.getCurIntVal());
 112     Lexer.Lex(); // Eat identifier.
 113     return false;
 114   case asmtok::LParen:
 115     Lexer.Lex(); // Eat the '('.
 116     return ParseParenExpr(Res);
 117   case asmtok::Minus:
 118     Lexer.Lex(); // Eat the operator.
 119     if (ParsePrimaryExpr(Res))
 120       return true;
 121     Res = new AsmUnaryExpr(AsmUnaryExpr::Minus, Res);
 122     return false;
 123   case asmtok::Plus:
 124     Lexer.Lex(); // Eat the operator.
 125     if (ParsePrimaryExpr(Res))
 126       return true;
 127     Res = new AsmUnaryExpr(AsmUnaryExpr::Plus, Res);
 128     return false;
 129   case asmtok::Tilde:
 130     Lexer.Lex(); // Eat the operator.
 131     if (ParsePrimaryExpr(Res))
 132       return true;
 133     Res = new AsmUnaryExpr(AsmUnaryExpr::Not, Res);
 134     return false;
 135   }
 136 }
 137
 138 /// ParseExpression - Parse an expression and return it.
 139 ///
 140 ///  expr ::= expr +,- expr          -> lowest.
 141 ///  expr ::= expr |,^,&,! expr      -> middle.
 142 ///  expr ::= expr *,/,%,<<,>> expr  -> highest.
 143 ///  expr ::= primaryexpr
 144 ///
 145 bool AsmParser::ParseExpression(AsmExpr *&Res) {
 146   Res = 0;
 147   return ParsePrimaryExpr(Res) ||
 148          ParseBinOpRHS(1, Res);
 149 }
 150
 151 bool AsmParser::ParseAbsoluteExpression(int64_t &Res) {
 152   AsmExpr *Expr;
 153
 154   SMLoc StartLoc = Lexer.getLoc();
 155   if (ParseExpression(Expr))
 156     return true;
 157
 158   if (!Expr->EvaluateAsAbsolute(Ctx, Res))
 159     return Error(StartLoc, "expected absolute expression");
 160
 161   return false;
 162 }
 163
 164 bool AsmParser::ParseRelocatableExpression(MCValue &Res) {
 165   AsmExpr *Expr;
 166
 167   SMLoc StartLoc = Lexer.getLoc();
 168   if (ParseExpression(Expr))
 169     return true;
 170
 171   if (!Expr->EvaluateAsRelocatable(Ctx, Res))
 172     return Error(StartLoc, "expected relocatable expression");
 173
 174   return false;
 175 }
 176
 177 bool AsmParser::ParseParenRelocatableExpression(MCValue &Res) {
 178   AsmExpr *Expr;
 179
 180   SMLoc StartLoc = Lexer.getLoc();
 181   if (ParseParenExpr(Expr))
 182     return true;
 183
 184   if (!Expr->EvaluateAsRelocatable(Ctx, Res))
 185     return Error(StartLoc, "expected relocatable expression");
 186
 187   return false;
 188 }
 189
 190 static unsigned getBinOpPrecedence(asmtok::TokKind K,
 191                                    AsmBinaryExpr::Opcode &Kind) {
 192   switch (K) {
 193   default: return 0;    // not a binop.
 194
 195     // Lowest Precedence: &&, ||
 196   case asmtok::AmpAmp:
 197     Kind = AsmBinaryExpr::LAnd;
 198     return 1;
 199   case asmtok::PipePipe:
 200     Kind = AsmBinaryExpr::LOr;
 201     return 1;
 202
 203     // Low Precedence: +, -, ==, !=, <>, <, <=, >, >=
 204   case asmtok::Plus:
 205     Kind = AsmBinaryExpr::Add;
 206     return 2;
 207   case asmtok::Minus:
 208     Kind = AsmBinaryExpr::Sub;
 209     return 2;
 210   case asmtok::EqualEqual:
 211     Kind = AsmBinaryExpr::EQ;
 212     return 2;
 213   case asmtok::ExclaimEqual:
 214   case asmtok::LessGreater:
 215     Kind = AsmBinaryExpr::NE;
 216     return 2;
 217   case asmtok::Less:
 218     Kind = AsmBinaryExpr::LT;
 219     return 2;
 220   case asmtok::LessEqual:
 221     Kind = AsmBinaryExpr::LTE;
 222     return 2;
 223   case asmtok::Greater:
 224     Kind = AsmBinaryExpr::GT;
 225     return 2;
 226   case asmtok::GreaterEqual:
 227     Kind = AsmBinaryExpr::GTE;
 228     return 2;
 229
 230     // Intermediate Precedence: |, &, ^
 231     //
 232     // FIXME: gas seems to support '!' as an infix operator?
 233   case asmtok::Pipe:
 234     Kind = AsmBinaryExpr::Or;
 235     return 3;
 236   case asmtok::Caret:
 237     Kind = AsmBinaryExpr::Xor;
 238     return 3;
 239   case asmtok::Amp:
 240     Kind = AsmBinaryExpr::And;
 241     return 3;
 242
 243     // Highest Precedence: *, /, %, <<, >>
 244   case asmtok::Star:
 245     Kind = AsmBinaryExpr::Mul;
 246     return 4;
 247   case asmtok::Slash:
 248     Kind = AsmBinaryExpr::Div;
 249     return 4;
 250   case asmtok::Percent:
 251     Kind = AsmBinaryExpr::Mod;
 252     return 4;
 253   case asmtok::LessLess:
 254     Kind = AsmBinaryExpr::Shl;
 255     return 4;
 256   case asmtok::GreaterGreater:
 257     Kind = AsmBinaryExpr::Shr;
 258     return 4;
 259   }
 260 }
 261
 262
 263 /// ParseBinOpRHS - Parse all binary operators with precedence >= 'Precedence'.
 264 /// Res contains the LHS of the expression on input.
 265 bool AsmParser::ParseBinOpRHS(unsigned Precedence, AsmExpr *&Res) {
 266   while (1) {
 267     AsmBinaryExpr::Opcode Kind = AsmBinaryExpr::Add;
 268     unsigned TokPrec = getBinOpPrecedence(Lexer.getKind(), Kind);
 269
 270     // If the next token is lower precedence than we are allowed to eat, return
 271     // successfully with what we ate already.
 272     if (TokPrec < Precedence)
 273       return false;
 274
 275     Lexer.Lex();
 276
 277     // Eat the next primary expression.
 278     AsmExpr *RHS;
 279     if (ParsePrimaryExpr(RHS)) return true;
 280
 281     // If BinOp binds less tightly with RHS than the operator after RHS, let
 282     // the pending operator take RHS as its LHS.
 283     AsmBinaryExpr::Opcode Dummy;
 284     unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy);
 285     if (TokPrec < NextTokPrec) {
 286       if (ParseBinOpRHS(Precedence+1, RHS)) return true;
 287     }
 288
 289     // Merge LHS and RHS according to operator.
 290     Res = new AsmBinaryExpr(Kind, Res, RHS);
 291   }
 292 }
 293
 294
 295
 296
 297 /// ParseStatement:
 298 ///   ::= EndOfStatement
 299 ///   ::= Label* Directive ...Operands... EndOfStatement
 300 ///   ::= Label* Identifier OperandList* EndOfStatement
 301 bool AsmParser::ParseStatement() {
 302   switch (Lexer.getKind()) {
 303   default:
 304     return TokError("unexpected token at start of statement");
 305   case asmtok::EndOfStatement:
 306     Lexer.Lex();
 307     return false;
 308   case asmtok::Identifier:
 309     break;
 310   // TODO: Recurse on local labels etc.
 311   }
 312
 313   // If we have an identifier, handle it as the key symbol.
 314   SMLoc IDLoc = Lexer.getLoc();
 315   const char *IDVal = Lexer.getCurStrVal();
 316
 317   // Consume the identifier, see what is after it.
 318   switch (Lexer.Lex()) {
 319   case asmtok::Colon: {
 320     // identifier ':'   -> Label.
 321     Lexer.Lex();
 322
 323     // Diagnose attempt to use a variable as a label.
 324     //
 325     // FIXME: Diagnostics. Note the location of the definition as a label.
 326     // FIXME: This doesn't diagnose assignment to a symbol which has been
 327     // implicitly marked as external.
 328     MCSymbol *Sym = Ctx.GetOrCreateSymbol(IDVal);
 329     if (Sym->getSection())
 330       return Error(IDLoc, "invalid symbol redefinition");
 331     if (Ctx.GetSymbolValue(Sym))
 332       return Error(IDLoc, "symbol already used as assembler variable");
 333
 334     // Since we saw a label, create a symbol and emit it.
 335     // FIXME: If the label starts with L it is an assembler temporary label.
 336     // Why does the client of this api need to know this?
 337     Out.EmitLabel(Sym);
 338
 339     return ParseStatement();
 340   }
 341
 342   case asmtok::Equal:
 343     // identifier '=' ... -> assignment statement
 344     Lexer.Lex();
 345
 346     return ParseAssignment(IDVal, false);
 347
 348   default: // Normal instruction or directive.
 349     break;
 350   }
 351
 352   // Otherwise, we have a normal instruction or directive.
 353   if (IDVal[0] == '.') {
 354     // FIXME: This should be driven based on a hash lookup and callback.
 355     if (!strcmp(IDVal, ".section"))
 356       return ParseDirectiveDarwinSection();
 357     if (!strcmp(IDVal, ".text"))
 358       // FIXME: This changes behavior based on the -static flag to the
 359       // assembler.
 360       return ParseDirectiveSectionSwitch("__TEXT,__text",
 361                                          "regular,pure_instructions");
 362     if (!strcmp(IDVal, ".const"))
 363       return ParseDirectiveSectionSwitch("__TEXT,__const");
 364     if (!strcmp(IDVal, ".static_const"))
 365       return ParseDirectiveSectionSwitch("__TEXT,__static_const");
 366     if (!strcmp(IDVal, ".cstring"))
 367       return ParseDirectiveSectionSwitch("__TEXT,__cstring",
 368                                          "cstring_literals");
 369     if (!strcmp(IDVal, ".literal4"))
 370       return ParseDirectiveSectionSwitch("__TEXT,__literal4", "4byte_literals");
 371     if (!strcmp(IDVal, ".literal8"))
 372       return ParseDirectiveSectionSwitch("__TEXT,__literal8", "8byte_literals");
 373     if (!strcmp(IDVal, ".literal16"))
 374       return ParseDirectiveSectionSwitch("__TEXT,__literal16",
 375                                          "16byte_literals");
 376     if (!strcmp(IDVal, ".constructor"))
 377       return ParseDirectiveSectionSwitch("__TEXT,__constructor");
 378     if (!strcmp(IDVal, ".destructor"))
 379       return ParseDirectiveSectionSwitch("__TEXT,__destructor");
 380     if (!strcmp(IDVal, ".fvmlib_init0"))
 381       return ParseDirectiveSectionSwitch("__TEXT,__fvmlib_init0");
 382     if (!strcmp(IDVal, ".fvmlib_init1"))
 383       return ParseDirectiveSectionSwitch("__TEXT,__fvmlib_init1");
 384     if (!strcmp(IDVal, ".symbol_stub")) // FIXME: Different on PPC.
 385       return ParseDirectiveSectionSwitch("__IMPORT,__jump_table,symbol_stubs",
 386                                     "self_modifying_code+pure_instructions,5");
 387     // FIXME: .picsymbol_stub on PPC.
 388     if (!strcmp(IDVal, ".data"))
 389       return ParseDirectiveSectionSwitch("__DATA,__data");
 390     if (!strcmp(IDVal, ".static_data"))
 391       return ParseDirectiveSectionSwitch("__DATA,__static_data");
 392     if (!strcmp(IDVal, ".non_lazy_symbol_pointer"))
 393       return ParseDirectiveSectionSwitch("__DATA,__nl_symbol_pointer",
 394                                          "non_lazy_symbol_pointers");
 395     if (!strcmp(IDVal, ".lazy_symbol_pointer"))
 396       return ParseDirectiveSectionSwitch("__DATA,__la_symbol_pointer",
 397                                          "lazy_symbol_pointers");
 398     if (!strcmp(IDVal, ".dyld"))
 399       return ParseDirectiveSectionSwitch("__DATA,__dyld");
 400     if (!strcmp(IDVal, ".mod_init_func"))
 401       return ParseDirectiveSectionSwitch("__DATA,__mod_init_func",
 402                                          "mod_init_funcs");
 403     if (!strcmp(IDVal, ".mod_term_func"))
 404       return ParseDirectiveSectionSwitch("__DATA,__mod_term_func",
 405                                          "mod_term_funcs");
 406     if (!strcmp(IDVal, ".const_data"))
 407       return ParseDirectiveSectionSwitch("__DATA,__const", "regular");
 408
 409
 410     // FIXME: Verify attributes on sections.
 411     if (!strcmp(IDVal, ".objc_class"))
 412       return ParseDirectiveSectionSwitch("__OBJC,__class");
 413     if (!strcmp(IDVal, ".objc_meta_class"))
 414       return ParseDirectiveSectionSwitch("__OBJC,__meta_class");
 415     if (!strcmp(IDVal, ".objc_cat_cls_meth"))
 416       return ParseDirectiveSectionSwitch("__OBJC,__cat_cls_meth");
 417     if (!strcmp(IDVal, ".objc_cat_inst_meth"))
 418       return ParseDirectiveSectionSwitch("__OBJC,__cat_inst_meth");
 419     if (!strcmp(IDVal, ".objc_protocol"))
 420       return ParseDirectiveSectionSwitch("__OBJC,__protocol");
 421     if (!strcmp(IDVal, ".objc_string_object"))
 422       return ParseDirectiveSectionSwitch("__OBJC,__string_object");
 423     if (!strcmp(IDVal, ".objc_cls_meth"))
 424       return ParseDirectiveSectionSwitch("__OBJC,__cls_meth");
 425     if (!strcmp(IDVal, ".objc_inst_meth"))
 426       return ParseDirectiveSectionSwitch("__OBJC,__inst_meth");
 427     if (!strcmp(IDVal, ".objc_cls_refs"))
 428       return ParseDirectiveSectionSwitch("__OBJC,__cls_refs");
 429     if (!strcmp(IDVal, ".objc_message_refs"))
 430       return ParseDirectiveSectionSwitch("__OBJC,__message_refs");
 431     if (!strcmp(IDVal, ".objc_symbols"))
 432       return ParseDirectiveSectionSwitch("__OBJC,__symbols");
 433     if (!strcmp(IDVal, ".objc_category"))
 434       return ParseDirectiveSectionSwitch("__OBJC,__category");
 435     if (!strcmp(IDVal, ".objc_class_vars"))
 436       return ParseDirectiveSectionSwitch("__OBJC,__class_vars");
 437     if (!strcmp(IDVal, ".objc_instance_vars"))
 438       return ParseDirectiveSectionSwitch("__OBJC,__instance_vars");
 439     if (!strcmp(IDVal, ".objc_module_info"))
 440       return ParseDirectiveSectionSwitch("__OBJC,__module_info");
 441     if (!strcmp(IDVal, ".objc_class_names"))
 442       return ParseDirectiveSectionSwitch("__TEXT,__cstring","cstring_literals");
 443     if (!strcmp(IDVal, ".objc_meth_var_types"))
 444       return ParseDirectiveSectionSwitch("__TEXT,__cstring","cstring_literals");
 445     if (!strcmp(IDVal, ".objc_meth_var_names"))
 446       return ParseDirectiveSectionSwitch("__TEXT,__cstring","cstring_literals");
 447     if (!strcmp(IDVal, ".objc_selector_strs"))
 448       return ParseDirectiveSectionSwitch("__OBJC,__selector_strs");
 449
 450     // Assembler features
 451     if (!strcmp(IDVal, ".set"))
 452       return ParseDirectiveSet();
 453
 454     // Data directives
 455
 456     if (!strcmp(IDVal, ".ascii"))
 457       return ParseDirectiveAscii(false);
 458     if (!strcmp(IDVal, ".asciz"))
 459       return ParseDirectiveAscii(true);
 460
 461     // FIXME: Target hooks for size? Also for "word", "hword".
 462     if (!strcmp(IDVal, ".byte"))
 463       return ParseDirectiveValue(1);
 464     if (!strcmp(IDVal, ".short"))
 465       return ParseDirectiveValue(2);
 466     if (!strcmp(IDVal, ".long"))
 467       return ParseDirectiveValue(4);
 468     if (!strcmp(IDVal, ".quad"))
 469       return ParseDirectiveValue(8);
 470
 471     // FIXME: Target hooks for IsPow2.
 472     if (!strcmp(IDVal, ".align"))
 473       return ParseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1);
 474     if (!strcmp(IDVal, ".align32"))
 475       return ParseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4);
 476     if (!strcmp(IDVal, ".balign"))
 477       return ParseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1);
 478     if (!strcmp(IDVal, ".balignw"))
 479       return ParseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2);
 480     if (!strcmp(IDVal, ".balignl"))
 481       return ParseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4);
 482     if (!strcmp(IDVal, ".p2align"))
 483       return ParseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1);
 484     if (!strcmp(IDVal, ".p2alignw"))
 485       return ParseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2);
 486     if (!strcmp(IDVal, ".p2alignl"))
 487       return ParseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4);
 488
 489     if (!strcmp(IDVal, ".org"))
 490       return ParseDirectiveOrg();
 491
 492     if (!strcmp(IDVal, ".fill"))
 493       return ParseDirectiveFill();
 494     if (!strcmp(IDVal, ".space"))
 495       return ParseDirectiveSpace();
 496
 497     // Symbol attribute directives
 498     if (!strcmp(IDVal, ".globl") || !strcmp(IDVal, ".global"))
 499       return ParseDirectiveSymbolAttribute(MCStreamer::Global);
 500     if (!strcmp(IDVal, ".hidden"))
 501       return ParseDirectiveSymbolAttribute(MCStreamer::Hidden);
 502     if (!strcmp(IDVal, ".indirect_symbol"))
 503       return ParseDirectiveSymbolAttribute(MCStreamer::IndirectSymbol);
 504     if (!strcmp(IDVal, ".internal"))
 505       return ParseDirectiveSymbolAttribute(MCStreamer::Internal);
 506     if (!strcmp(IDVal, ".lazy_reference"))
 507       return ParseDirectiveSymbolAttribute(MCStreamer::LazyReference);
 508     if (!strcmp(IDVal, ".no_dead_strip"))
 509       return ParseDirectiveSymbolAttribute(MCStreamer::NoDeadStrip);
 510     if (!strcmp(IDVal, ".private_extern"))
 511       return ParseDirectiveSymbolAttribute(MCStreamer::PrivateExtern);
 512     if (!strcmp(IDVal, ".protected"))
 513       return ParseDirectiveSymbolAttribute(MCStreamer::Protected);
 514     if (!strcmp(IDVal, ".reference"))
 515       return ParseDirectiveSymbolAttribute(MCStreamer::Reference);
 516     if (!strcmp(IDVal, ".weak"))
 517       return ParseDirectiveSymbolAttribute(MCStreamer::Weak);
 518     if (!strcmp(IDVal, ".weak_definition"))
 519       return ParseDirectiveSymbolAttribute(MCStreamer::WeakDefinition);
 520     if (!strcmp(IDVal, ".weak_reference"))
 521       return ParseDirectiveSymbolAttribute(MCStreamer::WeakReference);
 522
 523     if (!strcmp(IDVal, ".comm"))
 524       return ParseDirectiveComm(/*IsLocal=*/false);
 525     if (!strcmp(IDVal, ".lcomm"))
 526       return ParseDirectiveComm(/*IsLocal=*/true);
 527     if (!strcmp(IDVal, ".zerofill"))
 528       return ParseDirectiveDarwinZerofill();
 529     if (!strcmp(IDVal, ".desc"))
 530       return ParseDirectiveDarwinSymbolDesc();
 531     if (!strcmp(IDVal, ".lsym"))
 532       return ParseDirectiveDarwinLsym();
 533
 534     if (!strcmp(IDVal, ".subsections_via_symbols"))
 535       return ParseDirectiveDarwinSubsectionsViaSymbols();
 536     if (!strcmp(IDVal, ".abort"))
 537       return ParseDirectiveAbort();
 538     if (!strcmp(IDVal, ".include"))
 539       return ParseDirectiveInclude();
 540     if (!strcmp(IDVal, ".dump"))
 541       return ParseDirectiveDarwinDumpOrLoad(/*IsDump=*/true);
 542     if (!strcmp(IDVal, ".load"))
 543       return ParseDirectiveDarwinDumpOrLoad(/*IsLoad=*/false);
 544
 545     Warning(IDLoc, "ignoring directive for now");
 546     EatToEndOfStatement();
 547     return false;
 548   }
 549
 550   MCInst Inst;
 551   if (ParseX86InstOperands(IDVal, Inst))
 552     return true;
 553
 554   if (Lexer.isNot(asmtok::EndOfStatement))
 555     return TokError("unexpected token in argument list");
 556
 557   // Eat the end of statement marker.
 558   Lexer.Lex();
 559
 560   // Instruction is good, process it.
 561   Out.EmitInstruction(Inst);
 562
 563   // Skip to end of line for now.
 564   return false;
 565 }
 566
 567 bool AsmParser::ParseAssignment(const char *Name, bool IsDotSet) {
 568   // FIXME: Use better location, we should use proper tokens.
 569   SMLoc EqualLoc = Lexer.getLoc();
 570
 571   MCValue Value;
 572   if (ParseRelocatableExpression(Value))
 573     return true;
 574
 575   if (Lexer.isNot(asmtok::EndOfStatement))
 576     return TokError("unexpected token in assignment");
 577
 578   // Eat the end of statement marker.
 579   Lexer.Lex();
 580
 581   // Diagnose assignment to a label.
 582   //
 583   // FIXME: Diagnostics. Note the location of the definition as a label.
 584   // FIXME: This doesn't diagnose assignment to a symbol which has been
 585   // implicitly marked as external.
 586   // FIXME: Handle '.'.
 587   // FIXME: Diagnose assignment to protected identifier (e.g., register name).
 588   MCSymbol *Sym = Ctx.GetOrCreateSymbol(Name);
 589   if (Sym->getSection())
 590     return Error(EqualLoc, "invalid assignment to symbol emitted as a label");
 591   if (Sym->isExternal())
 592     return Error(EqualLoc, "invalid assignment to external symbol");
 593
 594   // Do the assignment.
 595   Out.EmitAssignment(Sym, Value, IsDotSet);
 596
 597   return false;
 598 }
 599
 600 /// ParseDirectiveSet:
 601 ///   ::= .set identifier ',' expression
 602 bool AsmParser::ParseDirectiveSet() {
 603   if (Lexer.isNot(asmtok::Identifier))
 604     return TokError("expected identifier after '.set' directive");
 605
 606   const char *Name = Lexer.getCurStrVal();
 607
 608   if (Lexer.Lex() != asmtok::Comma)
 609     return TokError("unexpected token in '.set'");
 610   Lexer.Lex();
 611
 612   return ParseAssignment(Name, true);
 613 }
 614
 615 /// ParseDirectiveSection:
 616 ///   ::= .section identifier (',' identifier)*
 617 /// FIXME: This should actually parse out the segment, section, attributes and
 618 /// sizeof_stub fields.
 619 bool AsmParser::ParseDirectiveDarwinSection() {
 620   if (Lexer.isNot(asmtok::Identifier))
 621     return TokError("expected identifier after '.section' directive");
 622
 623   std::string Section = Lexer.getCurStrVal();
 624   Lexer.Lex();
 625
 626   // Accept a comma separated list of modifiers.
 627   while (Lexer.is(asmtok::Comma)) {
 628     Lexer.Lex();
 629
 630     if (Lexer.isNot(asmtok::Identifier))
 631       return TokError("expected identifier in '.section' directive");
 632     Section += ',';
 633     Section += Lexer.getCurStrVal();
 634     Lexer.Lex();
 635   }
 636
 637   if (Lexer.isNot(asmtok::EndOfStatement))
 638     return TokError("unexpected token in '.section' directive");
 639   Lexer.Lex();
 640
 641   Out.SwitchSection(Ctx.GetSection(Section.c_str()));
 642   return false;
 643 }
 644
 645 bool AsmParser::ParseDirectiveSectionSwitch(const char *Section,
 646                                             const char *Directives) {
 647   if (Lexer.isNot(asmtok::EndOfStatement))
 648     return TokError("unexpected token in section switching directive");
 649   Lexer.Lex();
 650
 651   std::string SectionStr = Section;
 652   if (Directives && Directives[0]) {
 653     SectionStr += ",";
 654     SectionStr += Directives;
 655   }
 656
 657   Out.SwitchSection(Ctx.GetSection(Section));
 658   return false;
 659 }
 660
 661 /// ParseDirectiveAscii:
 662 ///   ::= ( .ascii | .asciz ) [ "string" ( , "string" )* ]
 663 bool AsmParser::ParseDirectiveAscii(bool ZeroTerminated) {
 664   if (Lexer.isNot(asmtok::EndOfStatement)) {
 665     for (;;) {
 666       if (Lexer.isNot(asmtok::String))
 667         return TokError("expected string in '.ascii' or '.asciz' directive");
 668
 669       // FIXME: This shouldn't use a const char* + strlen, the string could have
 670       // embedded nulls.
 671       // FIXME: Should have accessor for getting string contents.
 672       const char *Str = Lexer.getCurStrVal();
 673       Out.EmitBytes(Str + 1, strlen(Str) - 2);
 674       if (ZeroTerminated)
 675         Out.EmitBytes("\0", 1);
 676
 677       Lexer.Lex();
 678
 679       if (Lexer.is(asmtok::EndOfStatement))
 680         break;
 681
 682       if (Lexer.isNot(asmtok::Comma))
 683         return TokError("unexpected token in '.ascii' or '.asciz' directive");
 684       Lexer.Lex();
 685     }
 686   }
 687
 688   Lexer.Lex();
 689   return false;
 690 }
 691
 692 /// ParseDirectiveValue
 693 ///  ::= (.byte | .short | ... ) [ expression (, expression)* ]
 694 bool AsmParser::ParseDirectiveValue(unsigned Size) {
 695   if (Lexer.isNot(asmtok::EndOfStatement)) {
 696     for (;;) {
 697       MCValue Expr;
 698       if (ParseRelocatableExpression(Expr))
 699         return true;
 700
 701       Out.EmitValue(Expr, Size);
 702
 703       if (Lexer.is(asmtok::EndOfStatement))
 704         break;
 705
 706       // FIXME: Improve diagnostic.
 707       if (Lexer.isNot(asmtok::Comma))
 708         return TokError("unexpected token in directive");
 709       Lexer.Lex();
 710     }
 711   }
 712
 713   Lexer.Lex();
 714   return false;
 715 }
 716
 717 /// ParseDirectiveSpace
 718 ///  ::= .space expression [ , expression ]
 719 bool AsmParser::ParseDirectiveSpace() {
 720   int64_t NumBytes;
 721   if (ParseAbsoluteExpression(NumBytes))
 722     return true;
 723
 724   int64_t FillExpr = 0;
 725   bool HasFillExpr = false;
 726   if (Lexer.isNot(asmtok::EndOfStatement)) {
 727     if (Lexer.isNot(asmtok::Comma))
 728       return TokError("unexpected token in '.space' directive");
 729     Lexer.Lex();
 730
 731     if (ParseAbsoluteExpression(FillExpr))
 732       return true;
 733
 734     HasFillExpr = true;
 735
 736     if (Lexer.isNot(asmtok::EndOfStatement))
 737       return TokError("unexpected token in '.space' directive");
 738   }
 739
 740   Lexer.Lex();
 741
 742   if (NumBytes <= 0)
 743     return TokError("invalid number of bytes in '.space' directive");
 744
 745   // FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0.
 746   for (uint64_t i = 0, e = NumBytes; i != e; ++i)
 747     Out.EmitValue(MCValue::get(FillExpr), 1);
 748
 749   return false;
 750 }
 751
 752 /// ParseDirectiveFill
 753 ///  ::= .fill expression , expression , expression
 754 bool AsmParser::ParseDirectiveFill() {
 755   int64_t NumValues;
 756   if (ParseAbsoluteExpression(NumValues))
 757     return true;
 758
 759   if (Lexer.isNot(asmtok::Comma))
 760     return TokError("unexpected token in '.fill' directive");
 761   Lexer.Lex();
 762
 763   int64_t FillSize;
 764   if (ParseAbsoluteExpression(FillSize))
 765     return true;
 766
 767   if (Lexer.isNot(asmtok::Comma))
 768     return TokError("unexpected token in '.fill' directive");
 769   Lexer.Lex();
 770
 771   int64_t FillExpr;
 772   if (ParseAbsoluteExpression(FillExpr))
 773     return true;
 774
 775   if (Lexer.isNot(asmtok::EndOfStatement))
 776     return TokError("unexpected token in '.fill' directive");
 777
 778   Lexer.Lex();
 779
 780   if (FillSize != 1 && FillSize != 2 && FillSize != 4)
 781     return TokError("invalid '.fill' size, expected 1, 2, or 4");
 782
 783   for (uint64_t i = 0, e = NumValues; i != e; ++i)
 784     Out.EmitValue(MCValue::get(FillExpr), FillSize);
 785
 786   return false;
 787 }
 788
 789 /// ParseDirectiveOrg
 790 ///  ::= .org expression [ , expression ]
 791 bool AsmParser::ParseDirectiveOrg() {
 792   MCValue Offset;
 793   if (ParseRelocatableExpression(Offset))
 794     return true;
 795
 796   // Parse optional fill expression.
 797   int64_t FillExpr = 0;
 798   if (Lexer.isNot(asmtok::EndOfStatement)) {
 799     if (Lexer.isNot(asmtok::Comma))
 800       return TokError("unexpected token in '.org' directive");
 801     Lexer.Lex();
 802
 803     if (ParseAbsoluteExpression(FillExpr))
 804       return true;
 805
 806     if (Lexer.isNot(asmtok::EndOfStatement))
 807       return TokError("unexpected token in '.org' directive");
 808   }
 809
 810   Lexer.Lex();
 811
 812   // FIXME: Only limited forms of relocatable expressions are accepted here, it
 813   // has to be relative to the current section.
 814   Out.EmitValueToOffset(Offset, FillExpr);
 815
 816   return false;
 817 }
 818
 819 /// ParseDirectiveAlign
 820 ///  ::= {.align, ...} expression [ , expression [ , expression ]]
 821 bool AsmParser::ParseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
 822   int64_t Alignment;
 823   if (ParseAbsoluteExpression(Alignment))
 824     return true;
 825
 826   SMLoc MaxBytesLoc;
 827   bool HasFillExpr = false;
 828   int64_t FillExpr = 0;
 829   int64_t MaxBytesToFill = 0;
 830   if (Lexer.isNot(asmtok::EndOfStatement)) {
 831     if (Lexer.isNot(asmtok::Comma))
 832       return TokError("unexpected token in directive");
 833     Lexer.Lex();
 834
 835     // The fill expression can be omitted while specifying a maximum number of
 836     // alignment bytes, e.g:
 837     //  .align 3,,4
 838     if (Lexer.isNot(asmtok::Comma)) {
 839       HasFillExpr = true;
 840       if (ParseAbsoluteExpression(FillExpr))
 841         return true;
 842     }
 843
 844     if (Lexer.isNot(asmtok::EndOfStatement)) {
 845       if (Lexer.isNot(asmtok::Comma))
 846         return TokError("unexpected token in directive");
 847       Lexer.Lex();
 848
 849       MaxBytesLoc = Lexer.getLoc();
 850       if (ParseAbsoluteExpression(MaxBytesToFill))
 851         return true;
 852
 853       if (Lexer.isNot(asmtok::EndOfStatement))
 854         return TokError("unexpected token in directive");
 855     }
 856   }
 857
 858   Lexer.Lex();
 859
 860   if (!HasFillExpr) {
 861     // FIXME: Sometimes fill with nop.
 862     FillExpr = 0;
 863   }
 864
 865   // Compute alignment in bytes.
 866   if (IsPow2) {
 867     // FIXME: Diagnose overflow.
 868     Alignment = 1LL << Alignment;
 869   }
 870
 871   // Diagnose non-sensical max bytes to fill.
 872   if (MaxBytesLoc.isValid()) {
 873     if (MaxBytesToFill < 1) {
 874       Warning(MaxBytesLoc, "alignment directive can never be satisfied in this "
 875               "many bytes, ignoring");
 876       return false;
 877     }
 878
 879     if (MaxBytesToFill >= Alignment) {
 880       Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and "
 881               "has no effect");
 882       MaxBytesToFill = 0;
 883     }
 884   }
 885
 886   // FIXME: Target specific behavior about how the "extra" bytes are filled.
 887   Out.EmitValueToAlignment(Alignment, FillExpr, ValueSize, MaxBytesToFill);
 888
 889   return false;
 890 }
 891
 892 /// ParseDirectiveSymbolAttribute
 893 ///  ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ]
 894 bool AsmParser::ParseDirectiveSymbolAttribute(MCStreamer::SymbolAttr Attr) {
 895   if (Lexer.isNot(asmtok::EndOfStatement)) {
 896     for (;;) {
 897       if (Lexer.isNot(asmtok::Identifier))
 898         return TokError("expected identifier in directive");
 899
 900       MCSymbol *Sym = Ctx.GetOrCreateSymbol(Lexer.getCurStrVal());
 901       Lexer.Lex();
 902
 903       // If this is use of an undefined symbol then mark it external.
 904       if (!Sym->getSection() && !Ctx.GetSymbolValue(Sym))
 905         Sym->setExternal(true);
 906
 907       Out.EmitSymbolAttribute(Sym, Attr);
 908
 909       if (Lexer.is(asmtok::EndOfStatement))
 910         break;
 911
 912       if (Lexer.isNot(asmtok::Comma))
 913         return TokError("unexpected token in directive");
 914       Lexer.Lex();
 915     }
 916   }
 917
 918   Lexer.Lex();
 919   return false;
 920 }
 921
 922 /// ParseDirectiveDarwinSymbolDesc
 923 ///  ::= .desc identifier , expression
 924 bool AsmParser::ParseDirectiveDarwinSymbolDesc() {
 925   if (Lexer.isNot(asmtok::Identifier))
 926     return TokError("expected identifier in directive");
 927
 928   // handle the identifier as the key symbol.
 929   SMLoc IDLoc = Lexer.getLoc();
 930   MCSymbol *Sym = Ctx.GetOrCreateSymbol(Lexer.getCurStrVal());
 931   Lexer.Lex();
 932
 933   if (Lexer.isNot(asmtok::Comma))
 934     return TokError("unexpected token in '.desc' directive");
 935   Lexer.Lex();
 936
 937   SMLoc DescLoc = Lexer.getLoc();
 938   int64_t DescValue;
 939   if (ParseAbsoluteExpression(DescValue))
 940     return true;
 941
 942   if (Lexer.isNot(asmtok::EndOfStatement))
 943     return TokError("unexpected token in '.desc' directive");
 944
 945   Lexer.Lex();
 946
 947   // Set the n_desc field of this Symbol to this DescValue
 948   Out.EmitSymbolDesc(Sym, DescValue);
 949
 950   return false;
 951 }
 952
 953 /// ParseDirectiveComm
 954 ///  ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ]
 955 bool AsmParser::ParseDirectiveComm(bool IsLocal) {
 956   if (Lexer.isNot(asmtok::Identifier))
 957     return TokError("expected identifier in directive");
 958
 959   // handle the identifier as the key symbol.
 960   SMLoc IDLoc = Lexer.getLoc();
 961   MCSymbol *Sym = Ctx.GetOrCreateSymbol(Lexer.getCurStrVal());
 962   Lexer.Lex();
 963
 964   if (Lexer.isNot(asmtok::Comma))
 965     return TokError("unexpected token in directive");
 966   Lexer.Lex();
 967
 968   int64_t Size;
 969   SMLoc SizeLoc = Lexer.getLoc();
 970   if (ParseAbsoluteExpression(Size))
 971     return true;
 972
 973   int64_t Pow2Alignment = 0;
 974   SMLoc Pow2AlignmentLoc;
 975   if (Lexer.is(asmtok::Comma)) {
 976     Lexer.Lex();
 977     Pow2AlignmentLoc = Lexer.getLoc();
 978     if (ParseAbsoluteExpression(Pow2Alignment))
 979       return true;
 980   }
 981
 982   if (Lexer.isNot(asmtok::EndOfStatement))
 983     return TokError("unexpected token in '.comm' or '.lcomm' directive");
 984
 985   Lexer.Lex();
 986
 987   // NOTE: a size of zero for a .comm should create a undefined symbol
 988   // but a size of .lcomm creates a bss symbol of size zero.
 989   if (Size < 0)
 990     return Error(SizeLoc, "invalid '.comm' or '.lcomm' directive size, can't "
 991                  "be less than zero");
 992
 993   // NOTE: The alignment in the directive is a power of 2 value, the assember
 994   // may internally end up wanting an alignment in bytes.
 995   // FIXME: Diagnose overflow.
 996   if (Pow2Alignment < 0)
 997     return Error(Pow2AlignmentLoc, "invalid '.comm' or '.lcomm' directive "
 998                  "alignment, can't be less than zero");
 999
1000   // TODO: Symbol must be undefined or it is a error to re-defined the symbol
1001   if (Sym->getSection() || Ctx.GetSymbolValue(Sym))
1002     return Error(IDLoc, "invalid symbol redefinition");
1003
1004   // Create the Symbol as a common or local common with Size and Pow2Alignment
1005   Out.EmitCommonSymbol(Sym, Size, Pow2Alignment, IsLocal);
1006
1007   return false;
1008 }
1009
1010 /// ParseDirectiveDarwinZerofill
1011 ///  ::= .zerofill segname , sectname [, identifier , size_expression [
1012 ///      , align_expression ]]
1013 bool AsmParser::ParseDirectiveDarwinZerofill() {
1014   if (Lexer.isNot(asmtok::Identifier))
1015     return TokError("expected segment name after '.zerofill' directive");
1016   std::string Section = Lexer.getCurStrVal();
1017   Lexer.Lex();
1018
1019   if (Lexer.isNot(asmtok::Comma))
1020     return TokError("unexpected token in directive");
1021   Section += ',';
1022   Lexer.Lex();
1023
1024   if (Lexer.isNot(asmtok::Identifier))
1025     return TokError("expected section name after comma in '.zerofill' "
1026                     "directive");
1027   Section += Lexer.getCurStrVal();
1028   Lexer.Lex();
1029
1030   // FIXME: we will need to tell GetSection() that this is to be created with or
1031   // must have the Mach-O section type of S_ZEROFILL.  Something like the code
1032   // below could be done but for now it is not as EmitZerofill() does not know
1033   // how to deal with a section type in the section name like
1034   // ParseDirectiveDarwinSection() allows.
1035   // Section += ',';
1036   // Section += "zerofill";
1037
1038   // If this is the end of the line all that was wanted was to create the
1039   // the section but with no symbol.
1040   if (Lexer.is(asmtok::EndOfStatement)) {
1041     // Create the zerofill section but no symbol
1042     Out.EmitZerofill(Ctx.GetSection(Section.c_str()));
1043     return false;
1044   }
1045
1046   if (Lexer.isNot(asmtok::Comma))
1047     return TokError("unexpected token in directive");
1048   Lexer.Lex();
1049
1050   if (Lexer.isNot(asmtok::Identifier))
1051     return TokError("expected identifier in directive");
1052
1053   // handle the identifier as the key symbol.
1054   SMLoc IDLoc = Lexer.getLoc();
1055   MCSymbol *Sym = Ctx.GetOrCreateSymbol(Lexer.getCurStrVal());
1056   Lexer.Lex();
1057
1058   if (Lexer.isNot(asmtok::Comma))
1059     return TokError("unexpected token in directive");
1060   Lexer.Lex();
1061
1062   int64_t Size;
1063   SMLoc SizeLoc = Lexer.getLoc();
1064   if (ParseAbsoluteExpression(Size))
1065     return true;
1066
1067   int64_t Pow2Alignment = 0;
1068   SMLoc Pow2AlignmentLoc;
1069   if (Lexer.is(asmtok::Comma)) {
1070     Lexer.Lex();
1071     Pow2AlignmentLoc = Lexer.getLoc();
1072     if (ParseAbsoluteExpression(Pow2Alignment))
1073       return true;
1074   }
1075
1076   if (Lexer.isNot(asmtok::EndOfStatement))
1077     return TokError("unexpected token in '.zerofill' directive");
1078
1079   Lexer.Lex();
1080
1081   if (Size < 0)
1082     return Error(SizeLoc, "invalid '.zerofill' directive size, can't be less "
1083                  "than zero");
1084
1085   // NOTE: The alignment in the directive is a power of 2 value, the assember
1086   // may internally end up wanting an alignment in bytes.
1087   // FIXME: Diagnose overflow.
1088   if (Pow2Alignment < 0)
1089     return Error(Pow2AlignmentLoc, "invalid '.zerofill' directive alignment, "
1090                  "can't be less than zero");
1091
1092   // TODO: Symbol must be undefined or it is a error to re-defined the symbol
1093   if (Sym->getSection() || Ctx.GetSymbolValue(Sym))
1094     return Error(IDLoc, "invalid symbol redefinition");
1095
1096   // Create the zerofill Symbol with Size and Pow2Alignment
1097   Out.EmitZerofill(Ctx.GetSection(Section.c_str()), Sym, Size, Pow2Alignment);
1098
1099   return false;
1100 }
1101
1102 /// ParseDirectiveDarwinSubsectionsViaSymbols
1103 ///  ::= .subsections_via_symbols
1104 bool AsmParser::ParseDirectiveDarwinSubsectionsViaSymbols() {
1105   if (Lexer.isNot(asmtok::EndOfStatement))
1106     return TokError("unexpected token in '.subsections_via_symbols' directive");
1107
1108   Lexer.Lex();
1109
1110   Out.SubsectionsViaSymbols();
1111
1112   return false;
1113 }
1114
1115 /// ParseDirectiveAbort
1116 ///  ::= .abort [ "abort_string" ]
1117 bool AsmParser::ParseDirectiveAbort() {
1118   const char *Str = NULL;
1119   if (Lexer.isNot(asmtok::EndOfStatement)) {
1120     if (Lexer.isNot(asmtok::String))
1121       return TokError("expected string in '.abort' directive");
1122
1123     Str = Lexer.getCurStrVal();
1124
1125     Lexer.Lex();
1126   }
1127
1128   if (Lexer.isNot(asmtok::EndOfStatement))
1129     return TokError("unexpected token in '.abort' directive");
1130
1131   Lexer.Lex();
1132
1133   Out.AbortAssembly(Str);
1134
1135   return false;
1136 }
1137
1138 /// ParseDirectiveLsym
1139 ///  ::= .lsym identifier , expression
1140 bool AsmParser::ParseDirectiveDarwinLsym() {
1141   if (Lexer.isNot(asmtok::Identifier))
1142     return TokError("expected identifier in directive");
1143
1144   // handle the identifier as the key symbol.
1145   SMLoc IDLoc = Lexer.getLoc();
1146   MCSymbol *Sym = Ctx.GetOrCreateSymbol(Lexer.getCurStrVal());
1147   Lexer.Lex();
1148
1149   if (Lexer.isNot(asmtok::Comma))
1150     return TokError("unexpected token in '.lsym' directive");
1151   Lexer.Lex();
1152
1153   MCValue Expr;
1154   if (ParseRelocatableExpression(Expr))
1155     return true;
1156
1157   if (Lexer.isNot(asmtok::EndOfStatement))
1158     return TokError("unexpected token in '.lsym' directive");
1159
1160   Lexer.Lex();
1161
1162   // Create the Sym with the value of the Expr
1163   Out.EmitLocalSymbol(Sym, Expr);
1164
1165   return false;
1166 }
1167
1168 /// ParseDirectiveInclude
1169 ///  ::= .include "filename"
1170 bool AsmParser::ParseDirectiveInclude() {
1171   if (Lexer.isNot(asmtok::String))
1172     return TokError("expected string in '.include' directive");
1173
1174   std::string Filename = Lexer.getCurStrVal();
1175   SMLoc IncludeLoc = Lexer.getLoc();
1176   Lexer.Lex();
1177
1178   if (Lexer.isNot(asmtok::EndOfStatement))
1179     return TokError("unexpected token in '.include' directive");
1180
1181   // Strip the quotes.
1182   Filename = Filename.substr(1, Filename.size()-2);
1183
1184   // Attempt to switch the lexer to the included file before consuming the end
1185   // of statement to avoid losing it when we switch.
1186   if (Lexer.EnterIncludeFile(Filename)) {
1187     Lexer.PrintMessage(IncludeLoc,
1188                        "Could not find include file '" + Filename + "'",
1189                        "error");
1190     return true;
1191   }
1192
1193   return false;
1194 }
1195
1196 /// ParseDirectiveDarwinDumpOrLoad
1197 ///  ::= ( .dump | .load ) "filename"
1198 bool AsmParser::ParseDirectiveDarwinDumpOrLoad(bool IsDump) {
1199   const char *Str;
1200
1201   if (Lexer.isNot(asmtok::String))
1202     return TokError("expected string in '.dump' or '.load' directive");
1203
1204   Str = Lexer.getCurStrVal();
1205
1206   Lexer.Lex();
1207
1208   if (Lexer.isNot(asmtok::EndOfStatement))
1209     return TokError("unexpected token in '.dump' or '.load' directive");
1210
1211   Lexer.Lex();
1212
1213   if (IsDump)
1214     Out.DumpSymbolsandMacros(Str);
1215   else
1216     Out.LoadSymbolsandMacros(Str);
1217
1218   return false;
1219 }