LLParser.cpp revision 12c99d8160bbc4426feb09a6c020d3ba45ed4f06
1//===-- LLParser.cpp - Parser Class ---------------------------------------===// 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 file defines the parser class for .ll files. 11// 12//===----------------------------------------------------------------------===// 13 14#include "LLParser.h" 15#include "llvm/AutoUpgrade.h" 16#include "llvm/CallingConv.h" 17#include "llvm/Constants.h" 18#include "llvm/DerivedTypes.h" 19#include "llvm/InlineAsm.h" 20#include "llvm/Instructions.h" 21#include "llvm/LLVMContext.h" 22#include "llvm/MDNode.h" 23#include "llvm/Module.h" 24#include "llvm/ValueSymbolTable.h" 25#include "llvm/ADT/SmallPtrSet.h" 26#include "llvm/ADT/StringExtras.h" 27#include "llvm/Support/raw_ostream.h" 28using namespace llvm; 29 30namespace llvm { 31 /// ValID - Represents a reference of a definition of some sort with no type. 32 /// There are several cases where we have to parse the value but where the 33 /// type can depend on later context. This may either be a numeric reference 34 /// or a symbolic (%var) reference. This is just a discriminated union. 35 struct ValID { 36 enum { 37 t_LocalID, t_GlobalID, // ID in UIntVal. 38 t_LocalName, t_GlobalName, // Name in StrVal. 39 t_APSInt, t_APFloat, // Value in APSIntVal/APFloatVal. 40 t_Null, t_Undef, t_Zero, // No value. 41 t_EmptyArray, // No value: [] 42 t_Constant, // Value in ConstantVal. 43 t_InlineAsm // Value in StrVal/StrVal2/UIntVal. 44 } Kind; 45 46 LLParser::LocTy Loc; 47 unsigned UIntVal; 48 std::string StrVal, StrVal2; 49 APSInt APSIntVal; 50 APFloat APFloatVal; 51 Constant *ConstantVal; 52 ValID() : APFloatVal(0.0) {} 53 }; 54} 55 56/// Run: module ::= toplevelentity* 57bool LLParser::Run() { 58 // Prime the lexer. 59 Lex.Lex(); 60 61 return ParseTopLevelEntities() || 62 ValidateEndOfModule(); 63} 64 65/// ValidateEndOfModule - Do final validity and sanity checks at the end of the 66/// module. 67bool LLParser::ValidateEndOfModule() { 68 if (!ForwardRefTypes.empty()) 69 return Error(ForwardRefTypes.begin()->second.second, 70 "use of undefined type named '" + 71 ForwardRefTypes.begin()->first + "'"); 72 if (!ForwardRefTypeIDs.empty()) 73 return Error(ForwardRefTypeIDs.begin()->second.second, 74 "use of undefined type '%" + 75 utostr(ForwardRefTypeIDs.begin()->first) + "'"); 76 77 if (!ForwardRefVals.empty()) 78 return Error(ForwardRefVals.begin()->second.second, 79 "use of undefined value '@" + ForwardRefVals.begin()->first + 80 "'"); 81 82 if (!ForwardRefValIDs.empty()) 83 return Error(ForwardRefValIDs.begin()->second.second, 84 "use of undefined value '@" + 85 utostr(ForwardRefValIDs.begin()->first) + "'"); 86 87 // Look for intrinsic functions and CallInst that need to be upgraded 88 for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ) 89 UpgradeCallsToIntrinsic(FI++); // must be post-increment, as we remove 90 91 return false; 92} 93 94//===----------------------------------------------------------------------===// 95// Top-Level Entities 96//===----------------------------------------------------------------------===// 97 98bool LLParser::ParseTopLevelEntities() { 99 while (1) { 100 switch (Lex.getKind()) { 101 default: return TokError("expected top-level entity"); 102 case lltok::Eof: return false; 103 //case lltok::kw_define: 104 case lltok::kw_declare: if (ParseDeclare()) return true; break; 105 case lltok::kw_define: if (ParseDefine()) return true; break; 106 case lltok::kw_module: if (ParseModuleAsm()) return true; break; 107 case lltok::kw_target: if (ParseTargetDefinition()) return true; break; 108 case lltok::kw_deplibs: if (ParseDepLibs()) return true; break; 109 case lltok::kw_type: if (ParseUnnamedType()) return true; break; 110 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0 111 case lltok::LocalVar: if (ParseNamedType()) return true; break; 112 case lltok::GlobalVar: if (ParseNamedGlobal()) return true; break; 113 case lltok::Metadata: if (ParseStandaloneMetadata()) return true; break; 114 115 // The Global variable production with no name can have many different 116 // optional leading prefixes, the production is: 117 // GlobalVar ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 118 // OptionalAddrSpace ('constant'|'global') ... 119 case lltok::kw_private: // OptionalLinkage 120 case lltok::kw_internal: // OptionalLinkage 121 case lltok::kw_weak: // OptionalLinkage 122 case lltok::kw_weak_odr: // OptionalLinkage 123 case lltok::kw_linkonce: // OptionalLinkage 124 case lltok::kw_linkonce_odr: // OptionalLinkage 125 case lltok::kw_appending: // OptionalLinkage 126 case lltok::kw_dllexport: // OptionalLinkage 127 case lltok::kw_common: // OptionalLinkage 128 case lltok::kw_dllimport: // OptionalLinkage 129 case lltok::kw_extern_weak: // OptionalLinkage 130 case lltok::kw_external: { // OptionalLinkage 131 unsigned Linkage, Visibility; 132 if (ParseOptionalLinkage(Linkage) || 133 ParseOptionalVisibility(Visibility) || 134 ParseGlobal("", 0, Linkage, true, Visibility)) 135 return true; 136 break; 137 } 138 case lltok::kw_default: // OptionalVisibility 139 case lltok::kw_hidden: // OptionalVisibility 140 case lltok::kw_protected: { // OptionalVisibility 141 unsigned Visibility; 142 if (ParseOptionalVisibility(Visibility) || 143 ParseGlobal("", 0, 0, false, Visibility)) 144 return true; 145 break; 146 } 147 148 case lltok::kw_thread_local: // OptionalThreadLocal 149 case lltok::kw_addrspace: // OptionalAddrSpace 150 case lltok::kw_constant: // GlobalType 151 case lltok::kw_global: // GlobalType 152 if (ParseGlobal("", 0, 0, false, 0)) return true; 153 break; 154 } 155 } 156} 157 158 159/// toplevelentity 160/// ::= 'module' 'asm' STRINGCONSTANT 161bool LLParser::ParseModuleAsm() { 162 assert(Lex.getKind() == lltok::kw_module); 163 Lex.Lex(); 164 165 std::string AsmStr; 166 if (ParseToken(lltok::kw_asm, "expected 'module asm'") || 167 ParseStringConstant(AsmStr)) return true; 168 169 const std::string &AsmSoFar = M->getModuleInlineAsm(); 170 if (AsmSoFar.empty()) 171 M->setModuleInlineAsm(AsmStr); 172 else 173 M->setModuleInlineAsm(AsmSoFar+"\n"+AsmStr); 174 return false; 175} 176 177/// toplevelentity 178/// ::= 'target' 'triple' '=' STRINGCONSTANT 179/// ::= 'target' 'datalayout' '=' STRINGCONSTANT 180bool LLParser::ParseTargetDefinition() { 181 assert(Lex.getKind() == lltok::kw_target); 182 std::string Str; 183 switch (Lex.Lex()) { 184 default: return TokError("unknown target property"); 185 case lltok::kw_triple: 186 Lex.Lex(); 187 if (ParseToken(lltok::equal, "expected '=' after target triple") || 188 ParseStringConstant(Str)) 189 return true; 190 M->setTargetTriple(Str); 191 return false; 192 case lltok::kw_datalayout: 193 Lex.Lex(); 194 if (ParseToken(lltok::equal, "expected '=' after target datalayout") || 195 ParseStringConstant(Str)) 196 return true; 197 M->setDataLayout(Str); 198 return false; 199 } 200} 201 202/// toplevelentity 203/// ::= 'deplibs' '=' '[' ']' 204/// ::= 'deplibs' '=' '[' STRINGCONSTANT (',' STRINGCONSTANT)* ']' 205bool LLParser::ParseDepLibs() { 206 assert(Lex.getKind() == lltok::kw_deplibs); 207 Lex.Lex(); 208 if (ParseToken(lltok::equal, "expected '=' after deplibs") || 209 ParseToken(lltok::lsquare, "expected '=' after deplibs")) 210 return true; 211 212 if (EatIfPresent(lltok::rsquare)) 213 return false; 214 215 std::string Str; 216 if (ParseStringConstant(Str)) return true; 217 M->addLibrary(Str); 218 219 while (EatIfPresent(lltok::comma)) { 220 if (ParseStringConstant(Str)) return true; 221 M->addLibrary(Str); 222 } 223 224 return ParseToken(lltok::rsquare, "expected ']' at end of list"); 225} 226 227/// toplevelentity 228/// ::= 'type' type 229bool LLParser::ParseUnnamedType() { 230 assert(Lex.getKind() == lltok::kw_type); 231 LocTy TypeLoc = Lex.getLoc(); 232 Lex.Lex(); // eat kw_type 233 234 PATypeHolder Ty(Type::VoidTy); 235 if (ParseType(Ty)) return true; 236 237 unsigned TypeID = NumberedTypes.size(); 238 239 // See if this type was previously referenced. 240 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 241 FI = ForwardRefTypeIDs.find(TypeID); 242 if (FI != ForwardRefTypeIDs.end()) { 243 if (FI->second.first.get() == Ty) 244 return Error(TypeLoc, "self referential type is invalid"); 245 246 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 247 Ty = FI->second.first.get(); 248 ForwardRefTypeIDs.erase(FI); 249 } 250 251 NumberedTypes.push_back(Ty); 252 253 return false; 254} 255 256/// toplevelentity 257/// ::= LocalVar '=' 'type' type 258bool LLParser::ParseNamedType() { 259 std::string Name = Lex.getStrVal(); 260 LocTy NameLoc = Lex.getLoc(); 261 Lex.Lex(); // eat LocalVar. 262 263 PATypeHolder Ty(Type::VoidTy); 264 265 if (ParseToken(lltok::equal, "expected '=' after name") || 266 ParseToken(lltok::kw_type, "expected 'type' after name") || 267 ParseType(Ty)) 268 return true; 269 270 // Set the type name, checking for conflicts as we do so. 271 bool AlreadyExists = M->addTypeName(Name, Ty); 272 if (!AlreadyExists) return false; 273 274 // See if this type is a forward reference. We need to eagerly resolve 275 // types to allow recursive type redefinitions below. 276 std::map<std::string, std::pair<PATypeHolder, LocTy> >::iterator 277 FI = ForwardRefTypes.find(Name); 278 if (FI != ForwardRefTypes.end()) { 279 if (FI->second.first.get() == Ty) 280 return Error(NameLoc, "self referential type is invalid"); 281 282 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 283 Ty = FI->second.first.get(); 284 ForwardRefTypes.erase(FI); 285 } 286 287 // Inserting a name that is already defined, get the existing name. 288 const Type *Existing = M->getTypeByName(Name); 289 assert(Existing && "Conflict but no matching type?!"); 290 291 // Otherwise, this is an attempt to redefine a type. That's okay if 292 // the redefinition is identical to the original. 293 // FIXME: REMOVE REDEFINITIONS IN LLVM 3.0 294 if (Existing == Ty) return false; 295 296 // Any other kind of (non-equivalent) redefinition is an error. 297 return Error(NameLoc, "redefinition of type named '" + Name + "' of type '" + 298 Ty->getDescription() + "'"); 299} 300 301 302/// toplevelentity 303/// ::= 'declare' FunctionHeader 304bool LLParser::ParseDeclare() { 305 assert(Lex.getKind() == lltok::kw_declare); 306 Lex.Lex(); 307 308 Function *F; 309 return ParseFunctionHeader(F, false); 310} 311 312/// toplevelentity 313/// ::= 'define' FunctionHeader '{' ... 314bool LLParser::ParseDefine() { 315 assert(Lex.getKind() == lltok::kw_define); 316 Lex.Lex(); 317 318 Function *F; 319 return ParseFunctionHeader(F, true) || 320 ParseFunctionBody(*F); 321} 322 323/// ParseGlobalType 324/// ::= 'constant' 325/// ::= 'global' 326bool LLParser::ParseGlobalType(bool &IsConstant) { 327 if (Lex.getKind() == lltok::kw_constant) 328 IsConstant = true; 329 else if (Lex.getKind() == lltok::kw_global) 330 IsConstant = false; 331 else { 332 IsConstant = false; 333 return TokError("expected 'global' or 'constant'"); 334 } 335 Lex.Lex(); 336 return false; 337} 338 339/// ParseNamedGlobal: 340/// GlobalVar '=' OptionalVisibility ALIAS ... 341/// GlobalVar '=' OptionalLinkage OptionalVisibility ... -> global variable 342bool LLParser::ParseNamedGlobal() { 343 assert(Lex.getKind() == lltok::GlobalVar); 344 LocTy NameLoc = Lex.getLoc(); 345 std::string Name = Lex.getStrVal(); 346 Lex.Lex(); 347 348 bool HasLinkage; 349 unsigned Linkage, Visibility; 350 if (ParseToken(lltok::equal, "expected '=' in global variable") || 351 ParseOptionalLinkage(Linkage, HasLinkage) || 352 ParseOptionalVisibility(Visibility)) 353 return true; 354 355 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 356 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 357 return ParseAlias(Name, NameLoc, Visibility); 358} 359 360/// ParseStandaloneMetadata: 361/// !42 = !{...} 362bool LLParser::ParseStandaloneMetadata() { 363 assert(Lex.getKind() == lltok::Metadata); 364 Lex.Lex(); 365 unsigned MetadataID = 0; 366 if (ParseUInt32(MetadataID)) 367 return true; 368 if (MetadataCache.find(MetadataID) != MetadataCache.end()) 369 return TokError("Metadata id is already used"); 370 if (ParseToken(lltok::equal, "expected '=' here")) 371 return true; 372 373 LocTy TyLoc; 374 bool IsConstant; 375 PATypeHolder Ty(Type::VoidTy); 376 if (ParseGlobalType(IsConstant) || 377 ParseType(Ty, TyLoc)) 378 return true; 379 380 Constant *Init = 0; 381 if (ParseGlobalValue(Ty, Init)) 382 return true; 383 384 MetadataCache[MetadataID] = Init; 385 return false; 386} 387 388/// ParseAlias: 389/// ::= GlobalVar '=' OptionalVisibility 'alias' OptionalLinkage Aliasee 390/// Aliasee 391/// ::= TypeAndValue 392/// ::= 'bitcast' '(' TypeAndValue 'to' Type ')' 393/// ::= 'getelementptr' '(' ... ')' 394/// 395/// Everything through visibility has already been parsed. 396/// 397bool LLParser::ParseAlias(const std::string &Name, LocTy NameLoc, 398 unsigned Visibility) { 399 assert(Lex.getKind() == lltok::kw_alias); 400 Lex.Lex(); 401 unsigned Linkage; 402 LocTy LinkageLoc = Lex.getLoc(); 403 if (ParseOptionalLinkage(Linkage)) 404 return true; 405 406 if (Linkage != GlobalValue::ExternalLinkage && 407 Linkage != GlobalValue::WeakAnyLinkage && 408 Linkage != GlobalValue::WeakODRLinkage && 409 Linkage != GlobalValue::InternalLinkage && 410 Linkage != GlobalValue::PrivateLinkage) 411 return Error(LinkageLoc, "invalid linkage type for alias"); 412 413 Constant *Aliasee; 414 LocTy AliaseeLoc = Lex.getLoc(); 415 if (Lex.getKind() != lltok::kw_bitcast && 416 Lex.getKind() != lltok::kw_getelementptr) { 417 if (ParseGlobalTypeAndValue(Aliasee)) return true; 418 } else { 419 // The bitcast dest type is not present, it is implied by the dest type. 420 ValID ID; 421 if (ParseValID(ID)) return true; 422 if (ID.Kind != ValID::t_Constant) 423 return Error(AliaseeLoc, "invalid aliasee"); 424 Aliasee = ID.ConstantVal; 425 } 426 427 if (!isa<PointerType>(Aliasee->getType())) 428 return Error(AliaseeLoc, "alias must have pointer type"); 429 430 // Okay, create the alias but do not insert it into the module yet. 431 GlobalAlias* GA = new GlobalAlias(Aliasee->getType(), 432 (GlobalValue::LinkageTypes)Linkage, Name, 433 Aliasee); 434 GA->setVisibility((GlobalValue::VisibilityTypes)Visibility); 435 436 // See if this value already exists in the symbol table. If so, it is either 437 // a redefinition or a definition of a forward reference. 438 if (GlobalValue *Val = 439 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name))) { 440 // See if this was a redefinition. If so, there is no entry in 441 // ForwardRefVals. 442 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 443 I = ForwardRefVals.find(Name); 444 if (I == ForwardRefVals.end()) 445 return Error(NameLoc, "redefinition of global named '@" + Name + "'"); 446 447 // Otherwise, this was a definition of forward ref. Verify that types 448 // agree. 449 if (Val->getType() != GA->getType()) 450 return Error(NameLoc, 451 "forward reference and definition of alias have different types"); 452 453 // If they agree, just RAUW the old value with the alias and remove the 454 // forward ref info. 455 Val->replaceAllUsesWith(GA); 456 Val->eraseFromParent(); 457 ForwardRefVals.erase(I); 458 } 459 460 // Insert into the module, we know its name won't collide now. 461 M->getAliasList().push_back(GA); 462 assert(GA->getNameStr() == Name && "Should not be a name conflict!"); 463 464 return false; 465} 466 467/// ParseGlobal 468/// ::= GlobalVar '=' OptionalLinkage OptionalVisibility OptionalThreadLocal 469/// OptionalAddrSpace GlobalType Type Const 470/// ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 471/// OptionalAddrSpace GlobalType Type Const 472/// 473/// Everything through visibility has been parsed already. 474/// 475bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc, 476 unsigned Linkage, bool HasLinkage, 477 unsigned Visibility) { 478 unsigned AddrSpace; 479 bool ThreadLocal, IsConstant; 480 LocTy TyLoc; 481 482 PATypeHolder Ty(Type::VoidTy); 483 if (ParseOptionalToken(lltok::kw_thread_local, ThreadLocal) || 484 ParseOptionalAddrSpace(AddrSpace) || 485 ParseGlobalType(IsConstant) || 486 ParseType(Ty, TyLoc)) 487 return true; 488 489 // If the linkage is specified and is external, then no initializer is 490 // present. 491 Constant *Init = 0; 492 if (!HasLinkage || (Linkage != GlobalValue::DLLImportLinkage && 493 Linkage != GlobalValue::ExternalWeakLinkage && 494 Linkage != GlobalValue::ExternalLinkage)) { 495 if (ParseGlobalValue(Ty, Init)) 496 return true; 497 } 498 499 if (isa<FunctionType>(Ty) || Ty == Type::LabelTy) 500 return Error(TyLoc, "invalid type for global variable"); 501 502 GlobalVariable *GV = 0; 503 504 // See if the global was forward referenced, if so, use the global. 505 if (!Name.empty()) { 506 if ((GV = M->getGlobalVariable(Name, true)) && 507 !ForwardRefVals.erase(Name)) 508 return Error(NameLoc, "redefinition of global '@" + Name + "'"); 509 } else { 510 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 511 I = ForwardRefValIDs.find(NumberedVals.size()); 512 if (I != ForwardRefValIDs.end()) { 513 GV = cast<GlobalVariable>(I->second.first); 514 ForwardRefValIDs.erase(I); 515 } 516 } 517 518 if (GV == 0) { 519 GV = new GlobalVariable(Ty, false, GlobalValue::ExternalLinkage, 0, Name, 520 M, false, AddrSpace); 521 } else { 522 if (GV->getType()->getElementType() != Ty) 523 return Error(TyLoc, 524 "forward reference and definition of global have different types"); 525 526 // Move the forward-reference to the correct spot in the module. 527 M->getGlobalList().splice(M->global_end(), M->getGlobalList(), GV); 528 } 529 530 if (Name.empty()) 531 NumberedVals.push_back(GV); 532 533 // Set the parsed properties on the global. 534 if (Init) 535 GV->setInitializer(Init); 536 GV->setConstant(IsConstant); 537 GV->setLinkage((GlobalValue::LinkageTypes)Linkage); 538 GV->setVisibility((GlobalValue::VisibilityTypes)Visibility); 539 GV->setThreadLocal(ThreadLocal); 540 541 // Parse attributes on the global. 542 while (Lex.getKind() == lltok::comma) { 543 Lex.Lex(); 544 545 if (Lex.getKind() == lltok::kw_section) { 546 Lex.Lex(); 547 GV->setSection(Lex.getStrVal()); 548 if (ParseToken(lltok::StringConstant, "expected global section string")) 549 return true; 550 } else if (Lex.getKind() == lltok::kw_align) { 551 unsigned Alignment; 552 if (ParseOptionalAlignment(Alignment)) return true; 553 GV->setAlignment(Alignment); 554 } else { 555 TokError("unknown global variable property!"); 556 } 557 } 558 559 return false; 560} 561 562 563//===----------------------------------------------------------------------===// 564// GlobalValue Reference/Resolution Routines. 565//===----------------------------------------------------------------------===// 566 567/// GetGlobalVal - Get a value with the specified name or ID, creating a 568/// forward reference record if needed. This can return null if the value 569/// exists but does not have the right type. 570GlobalValue *LLParser::GetGlobalVal(const std::string &Name, const Type *Ty, 571 LocTy Loc) { 572 const PointerType *PTy = dyn_cast<PointerType>(Ty); 573 if (PTy == 0) { 574 Error(Loc, "global variable reference must have pointer type"); 575 return 0; 576 } 577 578 // Look this name up in the normal function symbol table. 579 GlobalValue *Val = 580 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name)); 581 582 // If this is a forward reference for the value, see if we already created a 583 // forward ref record. 584 if (Val == 0) { 585 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 586 I = ForwardRefVals.find(Name); 587 if (I != ForwardRefVals.end()) 588 Val = I->second.first; 589 } 590 591 // If we have the value in the symbol table or fwd-ref table, return it. 592 if (Val) { 593 if (Val->getType() == Ty) return Val; 594 Error(Loc, "'@" + Name + "' defined with type '" + 595 Val->getType()->getDescription() + "'"); 596 return 0; 597 } 598 599 // Otherwise, create a new forward reference for this value and remember it. 600 GlobalValue *FwdVal; 601 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 602 // Function types can return opaque but functions can't. 603 if (isa<OpaqueType>(FT->getReturnType())) { 604 Error(Loc, "function may not return opaque type"); 605 return 0; 606 } 607 608 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M); 609 } else { 610 FwdVal = new GlobalVariable(PTy->getElementType(), false, 611 GlobalValue::ExternalWeakLinkage, 0, Name, M); 612 } 613 614 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 615 return FwdVal; 616} 617 618GlobalValue *LLParser::GetGlobalVal(unsigned ID, const Type *Ty, LocTy Loc) { 619 const PointerType *PTy = dyn_cast<PointerType>(Ty); 620 if (PTy == 0) { 621 Error(Loc, "global variable reference must have pointer type"); 622 return 0; 623 } 624 625 GlobalValue *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 626 627 // If this is a forward reference for the value, see if we already created a 628 // forward ref record. 629 if (Val == 0) { 630 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 631 I = ForwardRefValIDs.find(ID); 632 if (I != ForwardRefValIDs.end()) 633 Val = I->second.first; 634 } 635 636 // If we have the value in the symbol table or fwd-ref table, return it. 637 if (Val) { 638 if (Val->getType() == Ty) return Val; 639 Error(Loc, "'@" + utostr(ID) + "' defined with type '" + 640 Val->getType()->getDescription() + "'"); 641 return 0; 642 } 643 644 // Otherwise, create a new forward reference for this value and remember it. 645 GlobalValue *FwdVal; 646 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 647 // Function types can return opaque but functions can't. 648 if (isa<OpaqueType>(FT->getReturnType())) { 649 Error(Loc, "function may not return opaque type"); 650 return 0; 651 } 652 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, "", M); 653 } else { 654 FwdVal = new GlobalVariable(PTy->getElementType(), false, 655 GlobalValue::ExternalWeakLinkage, 0, "", M); 656 } 657 658 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 659 return FwdVal; 660} 661 662 663//===----------------------------------------------------------------------===// 664// Helper Routines. 665//===----------------------------------------------------------------------===// 666 667/// ParseToken - If the current token has the specified kind, eat it and return 668/// success. Otherwise, emit the specified error and return failure. 669bool LLParser::ParseToken(lltok::Kind T, const char *ErrMsg) { 670 if (Lex.getKind() != T) 671 return TokError(ErrMsg); 672 Lex.Lex(); 673 return false; 674} 675 676/// ParseStringConstant 677/// ::= StringConstant 678bool LLParser::ParseStringConstant(std::string &Result) { 679 if (Lex.getKind() != lltok::StringConstant) 680 return TokError("expected string constant"); 681 Result = Lex.getStrVal(); 682 Lex.Lex(); 683 return false; 684} 685 686/// ParseUInt32 687/// ::= uint32 688bool LLParser::ParseUInt32(unsigned &Val) { 689 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned()) 690 return TokError("expected integer"); 691 uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(0xFFFFFFFFULL+1); 692 if (Val64 != unsigned(Val64)) 693 return TokError("expected 32-bit integer (too large)"); 694 Val = Val64; 695 Lex.Lex(); 696 return false; 697} 698 699 700/// ParseOptionalAddrSpace 701/// := /*empty*/ 702/// := 'addrspace' '(' uint32 ')' 703bool LLParser::ParseOptionalAddrSpace(unsigned &AddrSpace) { 704 AddrSpace = 0; 705 if (!EatIfPresent(lltok::kw_addrspace)) 706 return false; 707 return ParseToken(lltok::lparen, "expected '(' in address space") || 708 ParseUInt32(AddrSpace) || 709 ParseToken(lltok::rparen, "expected ')' in address space"); 710} 711 712/// ParseOptionalAttrs - Parse a potentially empty attribute list. AttrKind 713/// indicates what kind of attribute list this is: 0: function arg, 1: result, 714/// 2: function attr. 715/// 3: function arg after value: FIXME: REMOVE IN LLVM 3.0 716bool LLParser::ParseOptionalAttrs(unsigned &Attrs, unsigned AttrKind) { 717 Attrs = Attribute::None; 718 LocTy AttrLoc = Lex.getLoc(); 719 720 while (1) { 721 switch (Lex.getKind()) { 722 case lltok::kw_sext: 723 case lltok::kw_zext: 724 // Treat these as signext/zeroext if they occur in the argument list after 725 // the value, as in "call i8 @foo(i8 10 sext)". If they occur before the 726 // value, as in "call i8 @foo(i8 sext (" then it is part of a constant 727 // expr. 728 // FIXME: REMOVE THIS IN LLVM 3.0 729 if (AttrKind == 3) { 730 if (Lex.getKind() == lltok::kw_sext) 731 Attrs |= Attribute::SExt; 732 else 733 Attrs |= Attribute::ZExt; 734 break; 735 } 736 // FALL THROUGH. 737 default: // End of attributes. 738 if (AttrKind != 2 && (Attrs & Attribute::FunctionOnly)) 739 return Error(AttrLoc, "invalid use of function-only attribute"); 740 741 if (AttrKind != 0 && AttrKind != 3 && (Attrs & Attribute::ParameterOnly)) 742 return Error(AttrLoc, "invalid use of parameter-only attribute"); 743 744 return false; 745 case lltok::kw_zeroext: Attrs |= Attribute::ZExt; break; 746 case lltok::kw_signext: Attrs |= Attribute::SExt; break; 747 case lltok::kw_inreg: Attrs |= Attribute::InReg; break; 748 case lltok::kw_sret: Attrs |= Attribute::StructRet; break; 749 case lltok::kw_noalias: Attrs |= Attribute::NoAlias; break; 750 case lltok::kw_nocapture: Attrs |= Attribute::NoCapture; break; 751 case lltok::kw_byval: Attrs |= Attribute::ByVal; break; 752 case lltok::kw_nest: Attrs |= Attribute::Nest; break; 753 754 case lltok::kw_noreturn: Attrs |= Attribute::NoReturn; break; 755 case lltok::kw_nounwind: Attrs |= Attribute::NoUnwind; break; 756 case lltok::kw_noinline: Attrs |= Attribute::NoInline; break; 757 case lltok::kw_readnone: Attrs |= Attribute::ReadNone; break; 758 case lltok::kw_readonly: Attrs |= Attribute::ReadOnly; break; 759 case lltok::kw_alwaysinline: Attrs |= Attribute::AlwaysInline; break; 760 case lltok::kw_optsize: Attrs |= Attribute::OptimizeForSize; break; 761 case lltok::kw_ssp: Attrs |= Attribute::StackProtect; break; 762 case lltok::kw_sspreq: Attrs |= Attribute::StackProtectReq; break; 763 case lltok::kw_noredzone: Attrs |= Attribute::NoRedZone; break; 764 case lltok::kw_noimplicitfloat: Attrs |= Attribute::NoImplicitFloat; break; 765 766 case lltok::kw_align: { 767 unsigned Alignment; 768 if (ParseOptionalAlignment(Alignment)) 769 return true; 770 Attrs |= Attribute::constructAlignmentFromInt(Alignment); 771 continue; 772 } 773 } 774 Lex.Lex(); 775 } 776} 777 778/// ParseOptionalLinkage 779/// ::= /*empty*/ 780/// ::= 'private' 781/// ::= 'internal' 782/// ::= 'weak' 783/// ::= 'weak_odr' 784/// ::= 'linkonce' 785/// ::= 'linkonce_odr' 786/// ::= 'appending' 787/// ::= 'dllexport' 788/// ::= 'common' 789/// ::= 'dllimport' 790/// ::= 'extern_weak' 791/// ::= 'external' 792bool LLParser::ParseOptionalLinkage(unsigned &Res, bool &HasLinkage) { 793 HasLinkage = false; 794 switch (Lex.getKind()) { 795 default: Res = GlobalValue::ExternalLinkage; return false; 796 case lltok::kw_private: Res = GlobalValue::PrivateLinkage; break; 797 case lltok::kw_internal: Res = GlobalValue::InternalLinkage; break; 798 case lltok::kw_weak: Res = GlobalValue::WeakAnyLinkage; break; 799 case lltok::kw_weak_odr: Res = GlobalValue::WeakODRLinkage; break; 800 case lltok::kw_linkonce: Res = GlobalValue::LinkOnceAnyLinkage; break; 801 case lltok::kw_linkonce_odr: Res = GlobalValue::LinkOnceODRLinkage; break; 802 case lltok::kw_available_externally: 803 Res = GlobalValue::AvailableExternallyLinkage; 804 break; 805 case lltok::kw_appending: Res = GlobalValue::AppendingLinkage; break; 806 case lltok::kw_dllexport: Res = GlobalValue::DLLExportLinkage; break; 807 case lltok::kw_common: Res = GlobalValue::CommonLinkage; break; 808 case lltok::kw_dllimport: Res = GlobalValue::DLLImportLinkage; break; 809 case lltok::kw_extern_weak: Res = GlobalValue::ExternalWeakLinkage; break; 810 case lltok::kw_external: Res = GlobalValue::ExternalLinkage; break; 811 } 812 Lex.Lex(); 813 HasLinkage = true; 814 return false; 815} 816 817/// ParseOptionalVisibility 818/// ::= /*empty*/ 819/// ::= 'default' 820/// ::= 'hidden' 821/// ::= 'protected' 822/// 823bool LLParser::ParseOptionalVisibility(unsigned &Res) { 824 switch (Lex.getKind()) { 825 default: Res = GlobalValue::DefaultVisibility; return false; 826 case lltok::kw_default: Res = GlobalValue::DefaultVisibility; break; 827 case lltok::kw_hidden: Res = GlobalValue::HiddenVisibility; break; 828 case lltok::kw_protected: Res = GlobalValue::ProtectedVisibility; break; 829 } 830 Lex.Lex(); 831 return false; 832} 833 834/// ParseOptionalCallingConv 835/// ::= /*empty*/ 836/// ::= 'ccc' 837/// ::= 'fastcc' 838/// ::= 'coldcc' 839/// ::= 'x86_stdcallcc' 840/// ::= 'x86_fastcallcc' 841/// ::= 'arm_apcscc' 842/// ::= 'arm_aapcscc' 843/// ::= 'arm_aapcs_vfpcc' 844/// ::= 'cc' UINT 845/// 846bool LLParser::ParseOptionalCallingConv(unsigned &CC) { 847 switch (Lex.getKind()) { 848 default: CC = CallingConv::C; return false; 849 case lltok::kw_ccc: CC = CallingConv::C; break; 850 case lltok::kw_fastcc: CC = CallingConv::Fast; break; 851 case lltok::kw_coldcc: CC = CallingConv::Cold; break; 852 case lltok::kw_x86_stdcallcc: CC = CallingConv::X86_StdCall; break; 853 case lltok::kw_x86_fastcallcc: CC = CallingConv::X86_FastCall; break; 854 case lltok::kw_arm_apcscc: CC = CallingConv::ARM_APCS; break; 855 case lltok::kw_arm_aapcscc: CC = CallingConv::ARM_AAPCS; break; 856 case lltok::kw_arm_aapcs_vfpcc:CC = CallingConv::ARM_AAPCS_VFP; break; 857 case lltok::kw_cc: Lex.Lex(); return ParseUInt32(CC); 858 } 859 Lex.Lex(); 860 return false; 861} 862 863/// ParseOptionalAlignment 864/// ::= /* empty */ 865/// ::= 'align' 4 866bool LLParser::ParseOptionalAlignment(unsigned &Alignment) { 867 Alignment = 0; 868 if (!EatIfPresent(lltok::kw_align)) 869 return false; 870 LocTy AlignLoc = Lex.getLoc(); 871 if (ParseUInt32(Alignment)) return true; 872 if (!isPowerOf2_32(Alignment)) 873 return Error(AlignLoc, "alignment is not a power of two"); 874 return false; 875} 876 877/// ParseOptionalCommaAlignment 878/// ::= /* empty */ 879/// ::= ',' 'align' 4 880bool LLParser::ParseOptionalCommaAlignment(unsigned &Alignment) { 881 Alignment = 0; 882 if (!EatIfPresent(lltok::comma)) 883 return false; 884 return ParseToken(lltok::kw_align, "expected 'align'") || 885 ParseUInt32(Alignment); 886} 887 888/// ParseIndexList 889/// ::= (',' uint32)+ 890bool LLParser::ParseIndexList(SmallVectorImpl<unsigned> &Indices) { 891 if (Lex.getKind() != lltok::comma) 892 return TokError("expected ',' as start of index list"); 893 894 while (EatIfPresent(lltok::comma)) { 895 unsigned Idx; 896 if (ParseUInt32(Idx)) return true; 897 Indices.push_back(Idx); 898 } 899 900 return false; 901} 902 903//===----------------------------------------------------------------------===// 904// Type Parsing. 905//===----------------------------------------------------------------------===// 906 907/// ParseType - Parse and resolve a full type. 908bool LLParser::ParseType(PATypeHolder &Result, bool AllowVoid) { 909 LocTy TypeLoc = Lex.getLoc(); 910 if (ParseTypeRec(Result)) return true; 911 912 // Verify no unresolved uprefs. 913 if (!UpRefs.empty()) 914 return Error(UpRefs.back().Loc, "invalid unresolved type up reference"); 915 916 if (!AllowVoid && Result.get() == Type::VoidTy) 917 return Error(TypeLoc, "void type only allowed for function results"); 918 919 return false; 920} 921 922/// HandleUpRefs - Every time we finish a new layer of types, this function is 923/// called. It loops through the UpRefs vector, which is a list of the 924/// currently active types. For each type, if the up-reference is contained in 925/// the newly completed type, we decrement the level count. When the level 926/// count reaches zero, the up-referenced type is the type that is passed in: 927/// thus we can complete the cycle. 928/// 929PATypeHolder LLParser::HandleUpRefs(const Type *ty) { 930 // If Ty isn't abstract, or if there are no up-references in it, then there is 931 // nothing to resolve here. 932 if (!ty->isAbstract() || UpRefs.empty()) return ty; 933 934 PATypeHolder Ty(ty); 935#if 0 936 errs() << "Type '" << Ty->getDescription() 937 << "' newly formed. Resolving upreferences.\n" 938 << UpRefs.size() << " upreferences active!\n"; 939#endif 940 941 // If we find any resolvable upreferences (i.e., those whose NestingLevel goes 942 // to zero), we resolve them all together before we resolve them to Ty. At 943 // the end of the loop, if there is anything to resolve to Ty, it will be in 944 // this variable. 945 OpaqueType *TypeToResolve = 0; 946 947 for (unsigned i = 0; i != UpRefs.size(); ++i) { 948 // Determine if 'Ty' directly contains this up-references 'LastContainedTy'. 949 bool ContainsType = 950 std::find(Ty->subtype_begin(), Ty->subtype_end(), 951 UpRefs[i].LastContainedTy) != Ty->subtype_end(); 952 953#if 0 954 errs() << " UR#" << i << " - TypeContains(" << Ty->getDescription() << ", " 955 << UpRefs[i].LastContainedTy->getDescription() << ") = " 956 << (ContainsType ? "true" : "false") 957 << " level=" << UpRefs[i].NestingLevel << "\n"; 958#endif 959 if (!ContainsType) 960 continue; 961 962 // Decrement level of upreference 963 unsigned Level = --UpRefs[i].NestingLevel; 964 UpRefs[i].LastContainedTy = Ty; 965 966 // If the Up-reference has a non-zero level, it shouldn't be resolved yet. 967 if (Level != 0) 968 continue; 969 970#if 0 971 errs() << " * Resolving upreference for " << UpRefs[i].UpRefTy << "\n"; 972#endif 973 if (!TypeToResolve) 974 TypeToResolve = UpRefs[i].UpRefTy; 975 else 976 UpRefs[i].UpRefTy->refineAbstractTypeTo(TypeToResolve); 977 UpRefs.erase(UpRefs.begin()+i); // Remove from upreference list. 978 --i; // Do not skip the next element. 979 } 980 981 if (TypeToResolve) 982 TypeToResolve->refineAbstractTypeTo(Ty); 983 984 return Ty; 985} 986 987 988/// ParseTypeRec - The recursive function used to process the internal 989/// implementation details of types. 990bool LLParser::ParseTypeRec(PATypeHolder &Result) { 991 switch (Lex.getKind()) { 992 default: 993 return TokError("expected type"); 994 case lltok::Type: 995 // TypeRec ::= 'float' | 'void' (etc) 996 Result = Lex.getTyVal(); 997 Lex.Lex(); 998 break; 999 case lltok::kw_opaque: 1000 // TypeRec ::= 'opaque' 1001 Result = Context.getOpaqueType(); 1002 Lex.Lex(); 1003 break; 1004 case lltok::lbrace: 1005 // TypeRec ::= '{' ... '}' 1006 if (ParseStructType(Result, false)) 1007 return true; 1008 break; 1009 case lltok::lsquare: 1010 // TypeRec ::= '[' ... ']' 1011 Lex.Lex(); // eat the lsquare. 1012 if (ParseArrayVectorType(Result, false)) 1013 return true; 1014 break; 1015 case lltok::less: // Either vector or packed struct. 1016 // TypeRec ::= '<' ... '>' 1017 Lex.Lex(); 1018 if (Lex.getKind() == lltok::lbrace) { 1019 if (ParseStructType(Result, true) || 1020 ParseToken(lltok::greater, "expected '>' at end of packed struct")) 1021 return true; 1022 } else if (ParseArrayVectorType(Result, true)) 1023 return true; 1024 break; 1025 case lltok::LocalVar: 1026 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0 1027 // TypeRec ::= %foo 1028 if (const Type *T = M->getTypeByName(Lex.getStrVal())) { 1029 Result = T; 1030 } else { 1031 Result = Context.getOpaqueType(); 1032 ForwardRefTypes.insert(std::make_pair(Lex.getStrVal(), 1033 std::make_pair(Result, 1034 Lex.getLoc()))); 1035 M->addTypeName(Lex.getStrVal(), Result.get()); 1036 } 1037 Lex.Lex(); 1038 break; 1039 1040 case lltok::LocalVarID: 1041 // TypeRec ::= %4 1042 if (Lex.getUIntVal() < NumberedTypes.size()) 1043 Result = NumberedTypes[Lex.getUIntVal()]; 1044 else { 1045 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 1046 I = ForwardRefTypeIDs.find(Lex.getUIntVal()); 1047 if (I != ForwardRefTypeIDs.end()) 1048 Result = I->second.first; 1049 else { 1050 Result = Context.getOpaqueType(); 1051 ForwardRefTypeIDs.insert(std::make_pair(Lex.getUIntVal(), 1052 std::make_pair(Result, 1053 Lex.getLoc()))); 1054 } 1055 } 1056 Lex.Lex(); 1057 break; 1058 case lltok::backslash: { 1059 // TypeRec ::= '\' 4 1060 Lex.Lex(); 1061 unsigned Val; 1062 if (ParseUInt32(Val)) return true; 1063 OpaqueType *OT = Context.getOpaqueType(); //Use temporary placeholder. 1064 UpRefs.push_back(UpRefRecord(Lex.getLoc(), Val, OT)); 1065 Result = OT; 1066 break; 1067 } 1068 } 1069 1070 // Parse the type suffixes. 1071 while (1) { 1072 switch (Lex.getKind()) { 1073 // End of type. 1074 default: return false; 1075 1076 // TypeRec ::= TypeRec '*' 1077 case lltok::star: 1078 if (Result.get() == Type::LabelTy) 1079 return TokError("basic block pointers are invalid"); 1080 if (Result.get() == Type::VoidTy) 1081 return TokError("pointers to void are invalid; use i8* instead"); 1082 if (!PointerType::isValidElementType(Result.get())) 1083 return TokError("pointer to this type is invalid"); 1084 Result = HandleUpRefs(Context.getPointerTypeUnqual(Result.get())); 1085 Lex.Lex(); 1086 break; 1087 1088 // TypeRec ::= TypeRec 'addrspace' '(' uint32 ')' '*' 1089 case lltok::kw_addrspace: { 1090 if (Result.get() == Type::LabelTy) 1091 return TokError("basic block pointers are invalid"); 1092 if (Result.get() == Type::VoidTy) 1093 return TokError("pointers to void are invalid; use i8* instead"); 1094 if (!PointerType::isValidElementType(Result.get())) 1095 return TokError("pointer to this type is invalid"); 1096 unsigned AddrSpace; 1097 if (ParseOptionalAddrSpace(AddrSpace) || 1098 ParseToken(lltok::star, "expected '*' in address space")) 1099 return true; 1100 1101 Result = HandleUpRefs(Context.getPointerType(Result.get(), AddrSpace)); 1102 break; 1103 } 1104 1105 /// Types '(' ArgTypeListI ')' OptFuncAttrs 1106 case lltok::lparen: 1107 if (ParseFunctionType(Result)) 1108 return true; 1109 break; 1110 } 1111 } 1112} 1113 1114/// ParseParameterList 1115/// ::= '(' ')' 1116/// ::= '(' Arg (',' Arg)* ')' 1117/// Arg 1118/// ::= Type OptionalAttributes Value OptionalAttributes 1119bool LLParser::ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList, 1120 PerFunctionState &PFS) { 1121 if (ParseToken(lltok::lparen, "expected '(' in call")) 1122 return true; 1123 1124 while (Lex.getKind() != lltok::rparen) { 1125 // If this isn't the first argument, we need a comma. 1126 if (!ArgList.empty() && 1127 ParseToken(lltok::comma, "expected ',' in argument list")) 1128 return true; 1129 1130 // Parse the argument. 1131 LocTy ArgLoc; 1132 PATypeHolder ArgTy(Type::VoidTy); 1133 unsigned ArgAttrs1, ArgAttrs2; 1134 Value *V; 1135 if (ParseType(ArgTy, ArgLoc) || 1136 ParseOptionalAttrs(ArgAttrs1, 0) || 1137 ParseValue(ArgTy, V, PFS) || 1138 // FIXME: Should not allow attributes after the argument, remove this in 1139 // LLVM 3.0. 1140 ParseOptionalAttrs(ArgAttrs2, 3)) 1141 return true; 1142 ArgList.push_back(ParamInfo(ArgLoc, V, ArgAttrs1|ArgAttrs2)); 1143 } 1144 1145 Lex.Lex(); // Lex the ')'. 1146 return false; 1147} 1148 1149 1150 1151/// ParseArgumentList - Parse the argument list for a function type or function 1152/// prototype. If 'inType' is true then we are parsing a FunctionType. 1153/// ::= '(' ArgTypeListI ')' 1154/// ArgTypeListI 1155/// ::= /*empty*/ 1156/// ::= '...' 1157/// ::= ArgTypeList ',' '...' 1158/// ::= ArgType (',' ArgType)* 1159/// 1160bool LLParser::ParseArgumentList(std::vector<ArgInfo> &ArgList, 1161 bool &isVarArg, bool inType) { 1162 isVarArg = false; 1163 assert(Lex.getKind() == lltok::lparen); 1164 Lex.Lex(); // eat the (. 1165 1166 if (Lex.getKind() == lltok::rparen) { 1167 // empty 1168 } else if (Lex.getKind() == lltok::dotdotdot) { 1169 isVarArg = true; 1170 Lex.Lex(); 1171 } else { 1172 LocTy TypeLoc = Lex.getLoc(); 1173 PATypeHolder ArgTy(Type::VoidTy); 1174 unsigned Attrs; 1175 std::string Name; 1176 1177 // If we're parsing a type, use ParseTypeRec, because we allow recursive 1178 // types (such as a function returning a pointer to itself). If parsing a 1179 // function prototype, we require fully resolved types. 1180 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1181 ParseOptionalAttrs(Attrs, 0)) return true; 1182 1183 if (ArgTy == Type::VoidTy) 1184 return Error(TypeLoc, "argument can not have void type"); 1185 1186 if (Lex.getKind() == lltok::LocalVar || 1187 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1188 Name = Lex.getStrVal(); 1189 Lex.Lex(); 1190 } 1191 1192 if (!FunctionType::isValidArgumentType(ArgTy)) 1193 return Error(TypeLoc, "invalid type for function argument"); 1194 1195 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1196 1197 while (EatIfPresent(lltok::comma)) { 1198 // Handle ... at end of arg list. 1199 if (EatIfPresent(lltok::dotdotdot)) { 1200 isVarArg = true; 1201 break; 1202 } 1203 1204 // Otherwise must be an argument type. 1205 TypeLoc = Lex.getLoc(); 1206 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1207 ParseOptionalAttrs(Attrs, 0)) return true; 1208 1209 if (ArgTy == Type::VoidTy) 1210 return Error(TypeLoc, "argument can not have void type"); 1211 1212 if (Lex.getKind() == lltok::LocalVar || 1213 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1214 Name = Lex.getStrVal(); 1215 Lex.Lex(); 1216 } else { 1217 Name = ""; 1218 } 1219 1220 if (!ArgTy->isFirstClassType() && !isa<OpaqueType>(ArgTy)) 1221 return Error(TypeLoc, "invalid type for function argument"); 1222 1223 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1224 } 1225 } 1226 1227 return ParseToken(lltok::rparen, "expected ')' at end of argument list"); 1228} 1229 1230/// ParseFunctionType 1231/// ::= Type ArgumentList OptionalAttrs 1232bool LLParser::ParseFunctionType(PATypeHolder &Result) { 1233 assert(Lex.getKind() == lltok::lparen); 1234 1235 if (!FunctionType::isValidReturnType(Result)) 1236 return TokError("invalid function return type"); 1237 1238 std::vector<ArgInfo> ArgList; 1239 bool isVarArg; 1240 unsigned Attrs; 1241 if (ParseArgumentList(ArgList, isVarArg, true) || 1242 // FIXME: Allow, but ignore attributes on function types! 1243 // FIXME: Remove in LLVM 3.0 1244 ParseOptionalAttrs(Attrs, 2)) 1245 return true; 1246 1247 // Reject names on the arguments lists. 1248 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 1249 if (!ArgList[i].Name.empty()) 1250 return Error(ArgList[i].Loc, "argument name invalid in function type"); 1251 if (!ArgList[i].Attrs != 0) { 1252 // Allow but ignore attributes on function types; this permits 1253 // auto-upgrade. 1254 // FIXME: REJECT ATTRIBUTES ON FUNCTION TYPES in LLVM 3.0 1255 } 1256 } 1257 1258 std::vector<const Type*> ArgListTy; 1259 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 1260 ArgListTy.push_back(ArgList[i].Type); 1261 1262 Result = HandleUpRefs(Context.getFunctionType(Result.get(), 1263 ArgListTy, isVarArg)); 1264 return false; 1265} 1266 1267/// ParseStructType: Handles packed and unpacked types. </> parsed elsewhere. 1268/// TypeRec 1269/// ::= '{' '}' 1270/// ::= '{' TypeRec (',' TypeRec)* '}' 1271/// ::= '<' '{' '}' '>' 1272/// ::= '<' '{' TypeRec (',' TypeRec)* '}' '>' 1273bool LLParser::ParseStructType(PATypeHolder &Result, bool Packed) { 1274 assert(Lex.getKind() == lltok::lbrace); 1275 Lex.Lex(); // Consume the '{' 1276 1277 if (EatIfPresent(lltok::rbrace)) { 1278 Result = Context.getStructType(Packed); 1279 return false; 1280 } 1281 1282 std::vector<PATypeHolder> ParamsList; 1283 LocTy EltTyLoc = Lex.getLoc(); 1284 if (ParseTypeRec(Result)) return true; 1285 ParamsList.push_back(Result); 1286 1287 if (Result == Type::VoidTy) 1288 return Error(EltTyLoc, "struct element can not have void type"); 1289 if (!StructType::isValidElementType(Result)) 1290 return Error(EltTyLoc, "invalid element type for struct"); 1291 1292 while (EatIfPresent(lltok::comma)) { 1293 EltTyLoc = Lex.getLoc(); 1294 if (ParseTypeRec(Result)) return true; 1295 1296 if (Result == Type::VoidTy) 1297 return Error(EltTyLoc, "struct element can not have void type"); 1298 if (!StructType::isValidElementType(Result)) 1299 return Error(EltTyLoc, "invalid element type for struct"); 1300 1301 ParamsList.push_back(Result); 1302 } 1303 1304 if (ParseToken(lltok::rbrace, "expected '}' at end of struct")) 1305 return true; 1306 1307 std::vector<const Type*> ParamsListTy; 1308 for (unsigned i = 0, e = ParamsList.size(); i != e; ++i) 1309 ParamsListTy.push_back(ParamsList[i].get()); 1310 Result = HandleUpRefs(Context.getStructType(ParamsListTy, Packed)); 1311 return false; 1312} 1313 1314/// ParseArrayVectorType - Parse an array or vector type, assuming the first 1315/// token has already been consumed. 1316/// TypeRec 1317/// ::= '[' APSINTVAL 'x' Types ']' 1318/// ::= '<' APSINTVAL 'x' Types '>' 1319bool LLParser::ParseArrayVectorType(PATypeHolder &Result, bool isVector) { 1320 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned() || 1321 Lex.getAPSIntVal().getBitWidth() > 64) 1322 return TokError("expected number in address space"); 1323 1324 LocTy SizeLoc = Lex.getLoc(); 1325 uint64_t Size = Lex.getAPSIntVal().getZExtValue(); 1326 Lex.Lex(); 1327 1328 if (ParseToken(lltok::kw_x, "expected 'x' after element count")) 1329 return true; 1330 1331 LocTy TypeLoc = Lex.getLoc(); 1332 PATypeHolder EltTy(Type::VoidTy); 1333 if (ParseTypeRec(EltTy)) return true; 1334 1335 if (EltTy == Type::VoidTy) 1336 return Error(TypeLoc, "array and vector element type cannot be void"); 1337 1338 if (ParseToken(isVector ? lltok::greater : lltok::rsquare, 1339 "expected end of sequential type")) 1340 return true; 1341 1342 if (isVector) { 1343 if (Size == 0) 1344 return Error(SizeLoc, "zero element vector is illegal"); 1345 if ((unsigned)Size != Size) 1346 return Error(SizeLoc, "size too large for vector"); 1347 if (!VectorType::isValidElementType(EltTy)) 1348 return Error(TypeLoc, "vector element type must be fp or integer"); 1349 Result = Context.getVectorType(EltTy, unsigned(Size)); 1350 } else { 1351 if (!ArrayType::isValidElementType(EltTy)) 1352 return Error(TypeLoc, "invalid array element type"); 1353 Result = HandleUpRefs(Context.getArrayType(EltTy, Size)); 1354 } 1355 return false; 1356} 1357 1358//===----------------------------------------------------------------------===// 1359// Function Semantic Analysis. 1360//===----------------------------------------------------------------------===// 1361 1362LLParser::PerFunctionState::PerFunctionState(LLParser &p, Function &f) 1363 : P(p), F(f) { 1364 1365 // Insert unnamed arguments into the NumberedVals list. 1366 for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 1367 AI != E; ++AI) 1368 if (!AI->hasName()) 1369 NumberedVals.push_back(AI); 1370} 1371 1372LLParser::PerFunctionState::~PerFunctionState() { 1373 // If there were any forward referenced non-basicblock values, delete them. 1374 for (std::map<std::string, std::pair<Value*, LocTy> >::iterator 1375 I = ForwardRefVals.begin(), E = ForwardRefVals.end(); I != E; ++I) 1376 if (!isa<BasicBlock>(I->second.first)) { 1377 I->second.first->replaceAllUsesWith( 1378 P.getContext().getUndef(I->second.first->getType())); 1379 delete I->second.first; 1380 I->second.first = 0; 1381 } 1382 1383 for (std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1384 I = ForwardRefValIDs.begin(), E = ForwardRefValIDs.end(); I != E; ++I) 1385 if (!isa<BasicBlock>(I->second.first)) { 1386 I->second.first->replaceAllUsesWith( 1387 P.getContext().getUndef(I->second.first->getType())); 1388 delete I->second.first; 1389 I->second.first = 0; 1390 } 1391} 1392 1393bool LLParser::PerFunctionState::VerifyFunctionComplete() { 1394 if (!ForwardRefVals.empty()) 1395 return P.Error(ForwardRefVals.begin()->second.second, 1396 "use of undefined value '%" + ForwardRefVals.begin()->first + 1397 "'"); 1398 if (!ForwardRefValIDs.empty()) 1399 return P.Error(ForwardRefValIDs.begin()->second.second, 1400 "use of undefined value '%" + 1401 utostr(ForwardRefValIDs.begin()->first) + "'"); 1402 return false; 1403} 1404 1405 1406/// GetVal - Get a value with the specified name or ID, creating a 1407/// forward reference record if needed. This can return null if the value 1408/// exists but does not have the right type. 1409Value *LLParser::PerFunctionState::GetVal(const std::string &Name, 1410 const Type *Ty, LocTy Loc) { 1411 // Look this name up in the normal function symbol table. 1412 Value *Val = F.getValueSymbolTable().lookup(Name); 1413 1414 // If this is a forward reference for the value, see if we already created a 1415 // forward ref record. 1416 if (Val == 0) { 1417 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1418 I = ForwardRefVals.find(Name); 1419 if (I != ForwardRefVals.end()) 1420 Val = I->second.first; 1421 } 1422 1423 // If we have the value in the symbol table or fwd-ref table, return it. 1424 if (Val) { 1425 if (Val->getType() == Ty) return Val; 1426 if (Ty == Type::LabelTy) 1427 P.Error(Loc, "'%" + Name + "' is not a basic block"); 1428 else 1429 P.Error(Loc, "'%" + Name + "' defined with type '" + 1430 Val->getType()->getDescription() + "'"); 1431 return 0; 1432 } 1433 1434 // Don't make placeholders with invalid type. 1435 if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty) && Ty != Type::LabelTy) { 1436 P.Error(Loc, "invalid use of a non-first-class type"); 1437 return 0; 1438 } 1439 1440 // Otherwise, create a new forward reference for this value and remember it. 1441 Value *FwdVal; 1442 if (Ty == Type::LabelTy) 1443 FwdVal = BasicBlock::Create(Name, &F); 1444 else 1445 FwdVal = new Argument(Ty, Name); 1446 1447 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 1448 return FwdVal; 1449} 1450 1451Value *LLParser::PerFunctionState::GetVal(unsigned ID, const Type *Ty, 1452 LocTy Loc) { 1453 // Look this name up in the normal function symbol table. 1454 Value *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 1455 1456 // If this is a forward reference for the value, see if we already created a 1457 // forward ref record. 1458 if (Val == 0) { 1459 std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1460 I = ForwardRefValIDs.find(ID); 1461 if (I != ForwardRefValIDs.end()) 1462 Val = I->second.first; 1463 } 1464 1465 // If we have the value in the symbol table or fwd-ref table, return it. 1466 if (Val) { 1467 if (Val->getType() == Ty) return Val; 1468 if (Ty == Type::LabelTy) 1469 P.Error(Loc, "'%" + utostr(ID) + "' is not a basic block"); 1470 else 1471 P.Error(Loc, "'%" + utostr(ID) + "' defined with type '" + 1472 Val->getType()->getDescription() + "'"); 1473 return 0; 1474 } 1475 1476 if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty) && Ty != Type::LabelTy) { 1477 P.Error(Loc, "invalid use of a non-first-class type"); 1478 return 0; 1479 } 1480 1481 // Otherwise, create a new forward reference for this value and remember it. 1482 Value *FwdVal; 1483 if (Ty == Type::LabelTy) 1484 FwdVal = BasicBlock::Create("", &F); 1485 else 1486 FwdVal = new Argument(Ty); 1487 1488 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 1489 return FwdVal; 1490} 1491 1492/// SetInstName - After an instruction is parsed and inserted into its 1493/// basic block, this installs its name. 1494bool LLParser::PerFunctionState::SetInstName(int NameID, 1495 const std::string &NameStr, 1496 LocTy NameLoc, Instruction *Inst) { 1497 // If this instruction has void type, it cannot have a name or ID specified. 1498 if (Inst->getType() == Type::VoidTy) { 1499 if (NameID != -1 || !NameStr.empty()) 1500 return P.Error(NameLoc, "instructions returning void cannot have a name"); 1501 return false; 1502 } 1503 1504 // If this was a numbered instruction, verify that the instruction is the 1505 // expected value and resolve any forward references. 1506 if (NameStr.empty()) { 1507 // If neither a name nor an ID was specified, just use the next ID. 1508 if (NameID == -1) 1509 NameID = NumberedVals.size(); 1510 1511 if (unsigned(NameID) != NumberedVals.size()) 1512 return P.Error(NameLoc, "instruction expected to be numbered '%" + 1513 utostr(NumberedVals.size()) + "'"); 1514 1515 std::map<unsigned, std::pair<Value*, LocTy> >::iterator FI = 1516 ForwardRefValIDs.find(NameID); 1517 if (FI != ForwardRefValIDs.end()) { 1518 if (FI->second.first->getType() != Inst->getType()) 1519 return P.Error(NameLoc, "instruction forward referenced with type '" + 1520 FI->second.first->getType()->getDescription() + "'"); 1521 FI->second.first->replaceAllUsesWith(Inst); 1522 ForwardRefValIDs.erase(FI); 1523 } 1524 1525 NumberedVals.push_back(Inst); 1526 return false; 1527 } 1528 1529 // Otherwise, the instruction had a name. Resolve forward refs and set it. 1530 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1531 FI = ForwardRefVals.find(NameStr); 1532 if (FI != ForwardRefVals.end()) { 1533 if (FI->second.first->getType() != Inst->getType()) 1534 return P.Error(NameLoc, "instruction forward referenced with type '" + 1535 FI->second.first->getType()->getDescription() + "'"); 1536 FI->second.first->replaceAllUsesWith(Inst); 1537 ForwardRefVals.erase(FI); 1538 } 1539 1540 // Set the name on the instruction. 1541 Inst->setName(NameStr); 1542 1543 if (Inst->getNameStr() != NameStr) 1544 return P.Error(NameLoc, "multiple definition of local value named '" + 1545 NameStr + "'"); 1546 return false; 1547} 1548 1549/// GetBB - Get a basic block with the specified name or ID, creating a 1550/// forward reference record if needed. 1551BasicBlock *LLParser::PerFunctionState::GetBB(const std::string &Name, 1552 LocTy Loc) { 1553 return cast_or_null<BasicBlock>(GetVal(Name, Type::LabelTy, Loc)); 1554} 1555 1556BasicBlock *LLParser::PerFunctionState::GetBB(unsigned ID, LocTy Loc) { 1557 return cast_or_null<BasicBlock>(GetVal(ID, Type::LabelTy, Loc)); 1558} 1559 1560/// DefineBB - Define the specified basic block, which is either named or 1561/// unnamed. If there is an error, this returns null otherwise it returns 1562/// the block being defined. 1563BasicBlock *LLParser::PerFunctionState::DefineBB(const std::string &Name, 1564 LocTy Loc) { 1565 BasicBlock *BB; 1566 if (Name.empty()) 1567 BB = GetBB(NumberedVals.size(), Loc); 1568 else 1569 BB = GetBB(Name, Loc); 1570 if (BB == 0) return 0; // Already diagnosed error. 1571 1572 // Move the block to the end of the function. Forward ref'd blocks are 1573 // inserted wherever they happen to be referenced. 1574 F.getBasicBlockList().splice(F.end(), F.getBasicBlockList(), BB); 1575 1576 // Remove the block from forward ref sets. 1577 if (Name.empty()) { 1578 ForwardRefValIDs.erase(NumberedVals.size()); 1579 NumberedVals.push_back(BB); 1580 } else { 1581 // BB forward references are already in the function symbol table. 1582 ForwardRefVals.erase(Name); 1583 } 1584 1585 return BB; 1586} 1587 1588//===----------------------------------------------------------------------===// 1589// Constants. 1590//===----------------------------------------------------------------------===// 1591 1592/// ParseValID - Parse an abstract value that doesn't necessarily have a 1593/// type implied. For example, if we parse "4" we don't know what integer type 1594/// it has. The value will later be combined with its type and checked for 1595/// sanity. 1596bool LLParser::ParseValID(ValID &ID) { 1597 ID.Loc = Lex.getLoc(); 1598 switch (Lex.getKind()) { 1599 default: return TokError("expected value token"); 1600 case lltok::GlobalID: // @42 1601 ID.UIntVal = Lex.getUIntVal(); 1602 ID.Kind = ValID::t_GlobalID; 1603 break; 1604 case lltok::GlobalVar: // @foo 1605 ID.StrVal = Lex.getStrVal(); 1606 ID.Kind = ValID::t_GlobalName; 1607 break; 1608 case lltok::LocalVarID: // %42 1609 ID.UIntVal = Lex.getUIntVal(); 1610 ID.Kind = ValID::t_LocalID; 1611 break; 1612 case lltok::LocalVar: // %foo 1613 case lltok::StringConstant: // "foo" - FIXME: REMOVE IN LLVM 3.0 1614 ID.StrVal = Lex.getStrVal(); 1615 ID.Kind = ValID::t_LocalName; 1616 break; 1617 case lltok::Metadata: { // !{...} MDNode, !"foo" MDString 1618 ID.Kind = ValID::t_Constant; 1619 Lex.Lex(); 1620 if (Lex.getKind() == lltok::lbrace) { 1621 SmallVector<Value*, 16> Elts; 1622 if (ParseMDNodeVector(Elts) || 1623 ParseToken(lltok::rbrace, "expected end of metadata node")) 1624 return true; 1625 1626 ID.ConstantVal = Context.getMDNode(Elts.data(), Elts.size()); 1627 return false; 1628 } 1629 1630 // Standalone metadata reference 1631 // !{ ..., !42, ... } 1632 unsigned MID = 0; 1633 if (!ParseUInt32(MID)) { 1634 std::map<unsigned, Constant *>::iterator I = MetadataCache.find(MID); 1635 if (I == MetadataCache.end()) 1636 return TokError("Unknown metadata reference"); 1637 ID.ConstantVal = I->second; 1638 return false; 1639 } 1640 1641 // MDString: 1642 // ::= '!' STRINGCONSTANT 1643 std::string Str; 1644 if (ParseStringConstant(Str)) return true; 1645 1646 ID.ConstantVal = Context.getMDString(Str.data(), Str.data() + Str.size()); 1647 return false; 1648 } 1649 case lltok::APSInt: 1650 ID.APSIntVal = Lex.getAPSIntVal(); 1651 ID.Kind = ValID::t_APSInt; 1652 break; 1653 case lltok::APFloat: 1654 ID.APFloatVal = Lex.getAPFloatVal(); 1655 ID.Kind = ValID::t_APFloat; 1656 break; 1657 case lltok::kw_true: 1658 ID.ConstantVal = Context.getConstantIntTrue(); 1659 ID.Kind = ValID::t_Constant; 1660 break; 1661 case lltok::kw_false: 1662 ID.ConstantVal = Context.getConstantIntFalse(); 1663 ID.Kind = ValID::t_Constant; 1664 break; 1665 case lltok::kw_null: ID.Kind = ValID::t_Null; break; 1666 case lltok::kw_undef: ID.Kind = ValID::t_Undef; break; 1667 case lltok::kw_zeroinitializer: ID.Kind = ValID::t_Zero; break; 1668 1669 case lltok::lbrace: { 1670 // ValID ::= '{' ConstVector '}' 1671 Lex.Lex(); 1672 SmallVector<Constant*, 16> Elts; 1673 if (ParseGlobalValueVector(Elts) || 1674 ParseToken(lltok::rbrace, "expected end of struct constant")) 1675 return true; 1676 1677 ID.ConstantVal = Context.getConstantStruct(Elts.data(), Elts.size(), false); 1678 ID.Kind = ValID::t_Constant; 1679 return false; 1680 } 1681 case lltok::less: { 1682 // ValID ::= '<' ConstVector '>' --> Vector. 1683 // ValID ::= '<' '{' ConstVector '}' '>' --> Packed Struct. 1684 Lex.Lex(); 1685 bool isPackedStruct = EatIfPresent(lltok::lbrace); 1686 1687 SmallVector<Constant*, 16> Elts; 1688 LocTy FirstEltLoc = Lex.getLoc(); 1689 if (ParseGlobalValueVector(Elts) || 1690 (isPackedStruct && 1691 ParseToken(lltok::rbrace, "expected end of packed struct")) || 1692 ParseToken(lltok::greater, "expected end of constant")) 1693 return true; 1694 1695 if (isPackedStruct) { 1696 ID.ConstantVal = 1697 Context.getConstantStruct(Elts.data(), Elts.size(), true); 1698 ID.Kind = ValID::t_Constant; 1699 return false; 1700 } 1701 1702 if (Elts.empty()) 1703 return Error(ID.Loc, "constant vector must not be empty"); 1704 1705 if (!Elts[0]->getType()->isInteger() && 1706 !Elts[0]->getType()->isFloatingPoint()) 1707 return Error(FirstEltLoc, 1708 "vector elements must have integer or floating point type"); 1709 1710 // Verify that all the vector elements have the same type. 1711 for (unsigned i = 1, e = Elts.size(); i != e; ++i) 1712 if (Elts[i]->getType() != Elts[0]->getType()) 1713 return Error(FirstEltLoc, 1714 "vector element #" + utostr(i) + 1715 " is not of type '" + Elts[0]->getType()->getDescription()); 1716 1717 ID.ConstantVal = Context.getConstantVector(Elts.data(), Elts.size()); 1718 ID.Kind = ValID::t_Constant; 1719 return false; 1720 } 1721 case lltok::lsquare: { // Array Constant 1722 Lex.Lex(); 1723 SmallVector<Constant*, 16> Elts; 1724 LocTy FirstEltLoc = Lex.getLoc(); 1725 if (ParseGlobalValueVector(Elts) || 1726 ParseToken(lltok::rsquare, "expected end of array constant")) 1727 return true; 1728 1729 // Handle empty element. 1730 if (Elts.empty()) { 1731 // Use undef instead of an array because it's inconvenient to determine 1732 // the element type at this point, there being no elements to examine. 1733 ID.Kind = ValID::t_EmptyArray; 1734 return false; 1735 } 1736 1737 if (!Elts[0]->getType()->isFirstClassType()) 1738 return Error(FirstEltLoc, "invalid array element type: " + 1739 Elts[0]->getType()->getDescription()); 1740 1741 ArrayType *ATy = Context.getArrayType(Elts[0]->getType(), Elts.size()); 1742 1743 // Verify all elements are correct type! 1744 for (unsigned i = 0, e = Elts.size(); i != e; ++i) { 1745 if (Elts[i]->getType() != Elts[0]->getType()) 1746 return Error(FirstEltLoc, 1747 "array element #" + utostr(i) + 1748 " is not of type '" +Elts[0]->getType()->getDescription()); 1749 } 1750 1751 ID.ConstantVal = Context.getConstantArray(ATy, Elts.data(), Elts.size()); 1752 ID.Kind = ValID::t_Constant; 1753 return false; 1754 } 1755 case lltok::kw_c: // c "foo" 1756 Lex.Lex(); 1757 ID.ConstantVal = Context.getConstantArray(Lex.getStrVal(), false); 1758 if (ParseToken(lltok::StringConstant, "expected string")) return true; 1759 ID.Kind = ValID::t_Constant; 1760 return false; 1761 1762 case lltok::kw_asm: { 1763 // ValID ::= 'asm' SideEffect? STRINGCONSTANT ',' STRINGCONSTANT 1764 bool HasSideEffect; 1765 Lex.Lex(); 1766 if (ParseOptionalToken(lltok::kw_sideeffect, HasSideEffect) || 1767 ParseStringConstant(ID.StrVal) || 1768 ParseToken(lltok::comma, "expected comma in inline asm expression") || 1769 ParseToken(lltok::StringConstant, "expected constraint string")) 1770 return true; 1771 ID.StrVal2 = Lex.getStrVal(); 1772 ID.UIntVal = HasSideEffect; 1773 ID.Kind = ValID::t_InlineAsm; 1774 return false; 1775 } 1776 1777 case lltok::kw_trunc: 1778 case lltok::kw_zext: 1779 case lltok::kw_sext: 1780 case lltok::kw_fptrunc: 1781 case lltok::kw_fpext: 1782 case lltok::kw_bitcast: 1783 case lltok::kw_uitofp: 1784 case lltok::kw_sitofp: 1785 case lltok::kw_fptoui: 1786 case lltok::kw_fptosi: 1787 case lltok::kw_inttoptr: 1788 case lltok::kw_ptrtoint: { 1789 unsigned Opc = Lex.getUIntVal(); 1790 PATypeHolder DestTy(Type::VoidTy); 1791 Constant *SrcVal; 1792 Lex.Lex(); 1793 if (ParseToken(lltok::lparen, "expected '(' after constantexpr cast") || 1794 ParseGlobalTypeAndValue(SrcVal) || 1795 ParseToken(lltok::kw_to, "expected 'to' in constantexpr cast") || 1796 ParseType(DestTy) || 1797 ParseToken(lltok::rparen, "expected ')' at end of constantexpr cast")) 1798 return true; 1799 if (!CastInst::castIsValid((Instruction::CastOps)Opc, SrcVal, DestTy)) 1800 return Error(ID.Loc, "invalid cast opcode for cast from '" + 1801 SrcVal->getType()->getDescription() + "' to '" + 1802 DestTy->getDescription() + "'"); 1803 ID.ConstantVal = Context.getConstantExprCast((Instruction::CastOps)Opc, 1804 SrcVal, DestTy); 1805 ID.Kind = ValID::t_Constant; 1806 return false; 1807 } 1808 case lltok::kw_extractvalue: { 1809 Lex.Lex(); 1810 Constant *Val; 1811 SmallVector<unsigned, 4> Indices; 1812 if (ParseToken(lltok::lparen, "expected '(' in extractvalue constantexpr")|| 1813 ParseGlobalTypeAndValue(Val) || 1814 ParseIndexList(Indices) || 1815 ParseToken(lltok::rparen, "expected ')' in extractvalue constantexpr")) 1816 return true; 1817 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 1818 return Error(ID.Loc, "extractvalue operand must be array or struct"); 1819 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 1820 Indices.end())) 1821 return Error(ID.Loc, "invalid indices for extractvalue"); 1822 ID.ConstantVal = 1823 Context.getConstantExprExtractValue(Val, Indices.data(), Indices.size()); 1824 ID.Kind = ValID::t_Constant; 1825 return false; 1826 } 1827 case lltok::kw_insertvalue: { 1828 Lex.Lex(); 1829 Constant *Val0, *Val1; 1830 SmallVector<unsigned, 4> Indices; 1831 if (ParseToken(lltok::lparen, "expected '(' in insertvalue constantexpr")|| 1832 ParseGlobalTypeAndValue(Val0) || 1833 ParseToken(lltok::comma, "expected comma in insertvalue constantexpr")|| 1834 ParseGlobalTypeAndValue(Val1) || 1835 ParseIndexList(Indices) || 1836 ParseToken(lltok::rparen, "expected ')' in insertvalue constantexpr")) 1837 return true; 1838 if (!isa<StructType>(Val0->getType()) && !isa<ArrayType>(Val0->getType())) 1839 return Error(ID.Loc, "extractvalue operand must be array or struct"); 1840 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 1841 Indices.end())) 1842 return Error(ID.Loc, "invalid indices for insertvalue"); 1843 ID.ConstantVal = Context.getConstantExprInsertValue(Val0, Val1, 1844 Indices.data(), Indices.size()); 1845 ID.Kind = ValID::t_Constant; 1846 return false; 1847 } 1848 case lltok::kw_icmp: 1849 case lltok::kw_fcmp: 1850 case lltok::kw_vicmp: 1851 case lltok::kw_vfcmp: { 1852 unsigned PredVal, Opc = Lex.getUIntVal(); 1853 Constant *Val0, *Val1; 1854 Lex.Lex(); 1855 if (ParseCmpPredicate(PredVal, Opc) || 1856 ParseToken(lltok::lparen, "expected '(' in compare constantexpr") || 1857 ParseGlobalTypeAndValue(Val0) || 1858 ParseToken(lltok::comma, "expected comma in compare constantexpr") || 1859 ParseGlobalTypeAndValue(Val1) || 1860 ParseToken(lltok::rparen, "expected ')' in compare constantexpr")) 1861 return true; 1862 1863 if (Val0->getType() != Val1->getType()) 1864 return Error(ID.Loc, "compare operands must have the same type"); 1865 1866 CmpInst::Predicate Pred = (CmpInst::Predicate)PredVal; 1867 1868 if (Opc == Instruction::FCmp) { 1869 if (!Val0->getType()->isFPOrFPVector()) 1870 return Error(ID.Loc, "fcmp requires floating point operands"); 1871 ID.ConstantVal = Context.getConstantExprFCmp(Pred, Val0, Val1); 1872 } else if (Opc == Instruction::ICmp) { 1873 if (!Val0->getType()->isIntOrIntVector() && 1874 !isa<PointerType>(Val0->getType())) 1875 return Error(ID.Loc, "icmp requires pointer or integer operands"); 1876 ID.ConstantVal = Context.getConstantExprICmp(Pred, Val0, Val1); 1877 } else if (Opc == Instruction::VFCmp) { 1878 // FIXME: REMOVE VFCMP Support 1879 if (!Val0->getType()->isFPOrFPVector() || 1880 !isa<VectorType>(Val0->getType())) 1881 return Error(ID.Loc, "vfcmp requires vector floating point operands"); 1882 ID.ConstantVal = Context.getConstantExprVFCmp(Pred, Val0, Val1); 1883 } else if (Opc == Instruction::VICmp) { 1884 // FIXME: REMOVE VICMP Support 1885 if (!Val0->getType()->isIntOrIntVector() || 1886 !isa<VectorType>(Val0->getType())) 1887 return Error(ID.Loc, "vicmp requires vector floating point operands"); 1888 ID.ConstantVal = Context.getConstantExprVICmp(Pred, Val0, Val1); 1889 } 1890 ID.Kind = ValID::t_Constant; 1891 return false; 1892 } 1893 1894 // Binary Operators. 1895 case lltok::kw_add: 1896 case lltok::kw_fadd: 1897 case lltok::kw_sub: 1898 case lltok::kw_fsub: 1899 case lltok::kw_mul: 1900 case lltok::kw_fmul: 1901 case lltok::kw_udiv: 1902 case lltok::kw_sdiv: 1903 case lltok::kw_fdiv: 1904 case lltok::kw_urem: 1905 case lltok::kw_srem: 1906 case lltok::kw_frem: { 1907 unsigned Opc = Lex.getUIntVal(); 1908 Constant *Val0, *Val1; 1909 Lex.Lex(); 1910 if (ParseToken(lltok::lparen, "expected '(' in binary constantexpr") || 1911 ParseGlobalTypeAndValue(Val0) || 1912 ParseToken(lltok::comma, "expected comma in binary constantexpr") || 1913 ParseGlobalTypeAndValue(Val1) || 1914 ParseToken(lltok::rparen, "expected ')' in binary constantexpr")) 1915 return true; 1916 if (Val0->getType() != Val1->getType()) 1917 return Error(ID.Loc, "operands of constexpr must have same type"); 1918 if (!Val0->getType()->isIntOrIntVector() && 1919 !Val0->getType()->isFPOrFPVector()) 1920 return Error(ID.Loc,"constexpr requires integer, fp, or vector operands"); 1921 ID.ConstantVal = Context.getConstantExpr(Opc, Val0, Val1); 1922 ID.Kind = ValID::t_Constant; 1923 return false; 1924 } 1925 1926 // Logical Operations 1927 case lltok::kw_shl: 1928 case lltok::kw_lshr: 1929 case lltok::kw_ashr: 1930 case lltok::kw_and: 1931 case lltok::kw_or: 1932 case lltok::kw_xor: { 1933 unsigned Opc = Lex.getUIntVal(); 1934 Constant *Val0, *Val1; 1935 Lex.Lex(); 1936 if (ParseToken(lltok::lparen, "expected '(' in logical constantexpr") || 1937 ParseGlobalTypeAndValue(Val0) || 1938 ParseToken(lltok::comma, "expected comma in logical constantexpr") || 1939 ParseGlobalTypeAndValue(Val1) || 1940 ParseToken(lltok::rparen, "expected ')' in logical constantexpr")) 1941 return true; 1942 if (Val0->getType() != Val1->getType()) 1943 return Error(ID.Loc, "operands of constexpr must have same type"); 1944 if (!Val0->getType()->isIntOrIntVector()) 1945 return Error(ID.Loc, 1946 "constexpr requires integer or integer vector operands"); 1947 ID.ConstantVal = Context.getConstantExpr(Opc, Val0, Val1); 1948 ID.Kind = ValID::t_Constant; 1949 return false; 1950 } 1951 1952 case lltok::kw_getelementptr: 1953 case lltok::kw_shufflevector: 1954 case lltok::kw_insertelement: 1955 case lltok::kw_extractelement: 1956 case lltok::kw_select: { 1957 unsigned Opc = Lex.getUIntVal(); 1958 SmallVector<Constant*, 16> Elts; 1959 Lex.Lex(); 1960 if (ParseToken(lltok::lparen, "expected '(' in constantexpr") || 1961 ParseGlobalValueVector(Elts) || 1962 ParseToken(lltok::rparen, "expected ')' in constantexpr")) 1963 return true; 1964 1965 if (Opc == Instruction::GetElementPtr) { 1966 if (Elts.size() == 0 || !isa<PointerType>(Elts[0]->getType())) 1967 return Error(ID.Loc, "getelementptr requires pointer operand"); 1968 1969 if (!GetElementPtrInst::getIndexedType(Elts[0]->getType(), 1970 (Value**)&Elts[1], Elts.size()-1)) 1971 return Error(ID.Loc, "invalid indices for getelementptr"); 1972 ID.ConstantVal = Context.getConstantExprGetElementPtr(Elts[0], 1973 &Elts[1], Elts.size()-1); 1974 } else if (Opc == Instruction::Select) { 1975 if (Elts.size() != 3) 1976 return Error(ID.Loc, "expected three operands to select"); 1977 if (const char *Reason = SelectInst::areInvalidOperands(Elts[0], Elts[1], 1978 Elts[2])) 1979 return Error(ID.Loc, Reason); 1980 ID.ConstantVal = Context.getConstantExprSelect(Elts[0], Elts[1], Elts[2]); 1981 } else if (Opc == Instruction::ShuffleVector) { 1982 if (Elts.size() != 3) 1983 return Error(ID.Loc, "expected three operands to shufflevector"); 1984 if (!ShuffleVectorInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 1985 return Error(ID.Loc, "invalid operands to shufflevector"); 1986 ID.ConstantVal = 1987 Context.getConstantExprShuffleVector(Elts[0], Elts[1],Elts[2]); 1988 } else if (Opc == Instruction::ExtractElement) { 1989 if (Elts.size() != 2) 1990 return Error(ID.Loc, "expected two operands to extractelement"); 1991 if (!ExtractElementInst::isValidOperands(Elts[0], Elts[1])) 1992 return Error(ID.Loc, "invalid extractelement operands"); 1993 ID.ConstantVal = Context.getConstantExprExtractElement(Elts[0], Elts[1]); 1994 } else { 1995 assert(Opc == Instruction::InsertElement && "Unknown opcode"); 1996 if (Elts.size() != 3) 1997 return Error(ID.Loc, "expected three operands to insertelement"); 1998 if (!InsertElementInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 1999 return Error(ID.Loc, "invalid insertelement operands"); 2000 ID.ConstantVal = 2001 Context.getConstantExprInsertElement(Elts[0], Elts[1],Elts[2]); 2002 } 2003 2004 ID.Kind = ValID::t_Constant; 2005 return false; 2006 } 2007 } 2008 2009 Lex.Lex(); 2010 return false; 2011} 2012 2013/// ParseGlobalValue - Parse a global value with the specified type. 2014bool LLParser::ParseGlobalValue(const Type *Ty, Constant *&V) { 2015 V = 0; 2016 ValID ID; 2017 return ParseValID(ID) || 2018 ConvertGlobalValIDToValue(Ty, ID, V); 2019} 2020 2021/// ConvertGlobalValIDToValue - Apply a type to a ValID to get a fully resolved 2022/// constant. 2023bool LLParser::ConvertGlobalValIDToValue(const Type *Ty, ValID &ID, 2024 Constant *&V) { 2025 if (isa<FunctionType>(Ty)) 2026 return Error(ID.Loc, "functions are not values, refer to them as pointers"); 2027 2028 switch (ID.Kind) { 2029 default: assert(0 && "Unknown ValID!"); 2030 case ValID::t_LocalID: 2031 case ValID::t_LocalName: 2032 return Error(ID.Loc, "invalid use of function-local name"); 2033 case ValID::t_InlineAsm: 2034 return Error(ID.Loc, "inline asm can only be an operand of call/invoke"); 2035 case ValID::t_GlobalName: 2036 V = GetGlobalVal(ID.StrVal, Ty, ID.Loc); 2037 return V == 0; 2038 case ValID::t_GlobalID: 2039 V = GetGlobalVal(ID.UIntVal, Ty, ID.Loc); 2040 return V == 0; 2041 case ValID::t_APSInt: 2042 if (!isa<IntegerType>(Ty)) 2043 return Error(ID.Loc, "integer constant must have integer type"); 2044 ID.APSIntVal.extOrTrunc(Ty->getPrimitiveSizeInBits()); 2045 V = Context.getConstantInt(ID.APSIntVal); 2046 return false; 2047 case ValID::t_APFloat: 2048 if (!Ty->isFloatingPoint() || 2049 !ConstantFP::isValueValidForType(Ty, ID.APFloatVal)) 2050 return Error(ID.Loc, "floating point constant invalid for type"); 2051 2052 // The lexer has no type info, so builds all float and double FP constants 2053 // as double. Fix this here. Long double does not need this. 2054 if (&ID.APFloatVal.getSemantics() == &APFloat::IEEEdouble && 2055 Ty == Type::FloatTy) { 2056 bool Ignored; 2057 ID.APFloatVal.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, 2058 &Ignored); 2059 } 2060 V = Context.getConstantFP(ID.APFloatVal); 2061 2062 if (V->getType() != Ty) 2063 return Error(ID.Loc, "floating point constant does not have type '" + 2064 Ty->getDescription() + "'"); 2065 2066 return false; 2067 case ValID::t_Null: 2068 if (!isa<PointerType>(Ty)) 2069 return Error(ID.Loc, "null must be a pointer type"); 2070 V = Context.getConstantPointerNull(cast<PointerType>(Ty)); 2071 return false; 2072 case ValID::t_Undef: 2073 // FIXME: LabelTy should not be a first-class type. 2074 if ((!Ty->isFirstClassType() || Ty == Type::LabelTy) && 2075 !isa<OpaqueType>(Ty)) 2076 return Error(ID.Loc, "invalid type for undef constant"); 2077 V = Context.getUndef(Ty); 2078 return false; 2079 case ValID::t_EmptyArray: 2080 if (!isa<ArrayType>(Ty) || cast<ArrayType>(Ty)->getNumElements() != 0) 2081 return Error(ID.Loc, "invalid empty array initializer"); 2082 V = Context.getUndef(Ty); 2083 return false; 2084 case ValID::t_Zero: 2085 // FIXME: LabelTy should not be a first-class type. 2086 if (!Ty->isFirstClassType() || Ty == Type::LabelTy) 2087 return Error(ID.Loc, "invalid type for null constant"); 2088 V = Context.getNullValue(Ty); 2089 return false; 2090 case ValID::t_Constant: 2091 if (ID.ConstantVal->getType() != Ty) 2092 return Error(ID.Loc, "constant expression type mismatch"); 2093 V = ID.ConstantVal; 2094 return false; 2095 } 2096} 2097 2098bool LLParser::ParseGlobalTypeAndValue(Constant *&V) { 2099 PATypeHolder Type(Type::VoidTy); 2100 return ParseType(Type) || 2101 ParseGlobalValue(Type, V); 2102} 2103 2104/// ParseGlobalValueVector 2105/// ::= /*empty*/ 2106/// ::= TypeAndValue (',' TypeAndValue)* 2107bool LLParser::ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts) { 2108 // Empty list. 2109 if (Lex.getKind() == lltok::rbrace || 2110 Lex.getKind() == lltok::rsquare || 2111 Lex.getKind() == lltok::greater || 2112 Lex.getKind() == lltok::rparen) 2113 return false; 2114 2115 Constant *C; 2116 if (ParseGlobalTypeAndValue(C)) return true; 2117 Elts.push_back(C); 2118 2119 while (EatIfPresent(lltok::comma)) { 2120 if (ParseGlobalTypeAndValue(C)) return true; 2121 Elts.push_back(C); 2122 } 2123 2124 return false; 2125} 2126 2127 2128//===----------------------------------------------------------------------===// 2129// Function Parsing. 2130//===----------------------------------------------------------------------===// 2131 2132bool LLParser::ConvertValIDToValue(const Type *Ty, ValID &ID, Value *&V, 2133 PerFunctionState &PFS) { 2134 if (ID.Kind == ValID::t_LocalID) 2135 V = PFS.GetVal(ID.UIntVal, Ty, ID.Loc); 2136 else if (ID.Kind == ValID::t_LocalName) 2137 V = PFS.GetVal(ID.StrVal, Ty, ID.Loc); 2138 else if (ID.Kind == ValID::t_InlineAsm) { 2139 const PointerType *PTy = dyn_cast<PointerType>(Ty); 2140 const FunctionType *FTy = 2141 PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : 0; 2142 if (!FTy || !InlineAsm::Verify(FTy, ID.StrVal2)) 2143 return Error(ID.Loc, "invalid type for inline asm constraint string"); 2144 V = InlineAsm::get(FTy, ID.StrVal, ID.StrVal2, ID.UIntVal); 2145 return false; 2146 } else { 2147 Constant *C; 2148 if (ConvertGlobalValIDToValue(Ty, ID, C)) return true; 2149 V = C; 2150 return false; 2151 } 2152 2153 return V == 0; 2154} 2155 2156bool LLParser::ParseValue(const Type *Ty, Value *&V, PerFunctionState &PFS) { 2157 V = 0; 2158 ValID ID; 2159 return ParseValID(ID) || 2160 ConvertValIDToValue(Ty, ID, V, PFS); 2161} 2162 2163bool LLParser::ParseTypeAndValue(Value *&V, PerFunctionState &PFS) { 2164 PATypeHolder T(Type::VoidTy); 2165 return ParseType(T) || 2166 ParseValue(T, V, PFS); 2167} 2168 2169/// FunctionHeader 2170/// ::= OptionalLinkage OptionalVisibility OptionalCallingConv OptRetAttrs 2171/// Type GlobalName '(' ArgList ')' OptFuncAttrs OptSection 2172/// OptionalAlign OptGC 2173bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) { 2174 // Parse the linkage. 2175 LocTy LinkageLoc = Lex.getLoc(); 2176 unsigned Linkage; 2177 2178 unsigned Visibility, CC, RetAttrs; 2179 PATypeHolder RetType(Type::VoidTy); 2180 LocTy RetTypeLoc = Lex.getLoc(); 2181 if (ParseOptionalLinkage(Linkage) || 2182 ParseOptionalVisibility(Visibility) || 2183 ParseOptionalCallingConv(CC) || 2184 ParseOptionalAttrs(RetAttrs, 1) || 2185 ParseType(RetType, RetTypeLoc, true /*void allowed*/)) 2186 return true; 2187 2188 // Verify that the linkage is ok. 2189 switch ((GlobalValue::LinkageTypes)Linkage) { 2190 case GlobalValue::ExternalLinkage: 2191 break; // always ok. 2192 case GlobalValue::DLLImportLinkage: 2193 case GlobalValue::ExternalWeakLinkage: 2194 if (isDefine) 2195 return Error(LinkageLoc, "invalid linkage for function definition"); 2196 break; 2197 case GlobalValue::PrivateLinkage: 2198 case GlobalValue::InternalLinkage: 2199 case GlobalValue::AvailableExternallyLinkage: 2200 case GlobalValue::LinkOnceAnyLinkage: 2201 case GlobalValue::LinkOnceODRLinkage: 2202 case GlobalValue::WeakAnyLinkage: 2203 case GlobalValue::WeakODRLinkage: 2204 case GlobalValue::DLLExportLinkage: 2205 if (!isDefine) 2206 return Error(LinkageLoc, "invalid linkage for function declaration"); 2207 break; 2208 case GlobalValue::AppendingLinkage: 2209 case GlobalValue::GhostLinkage: 2210 case GlobalValue::CommonLinkage: 2211 return Error(LinkageLoc, "invalid function linkage type"); 2212 } 2213 2214 if (!FunctionType::isValidReturnType(RetType) || 2215 isa<OpaqueType>(RetType)) 2216 return Error(RetTypeLoc, "invalid function return type"); 2217 2218 LocTy NameLoc = Lex.getLoc(); 2219 2220 std::string FunctionName; 2221 if (Lex.getKind() == lltok::GlobalVar) { 2222 FunctionName = Lex.getStrVal(); 2223 } else if (Lex.getKind() == lltok::GlobalID) { // @42 is ok. 2224 unsigned NameID = Lex.getUIntVal(); 2225 2226 if (NameID != NumberedVals.size()) 2227 return TokError("function expected to be numbered '%" + 2228 utostr(NumberedVals.size()) + "'"); 2229 } else { 2230 return TokError("expected function name"); 2231 } 2232 2233 Lex.Lex(); 2234 2235 if (Lex.getKind() != lltok::lparen) 2236 return TokError("expected '(' in function argument list"); 2237 2238 std::vector<ArgInfo> ArgList; 2239 bool isVarArg; 2240 unsigned FuncAttrs; 2241 std::string Section; 2242 unsigned Alignment; 2243 std::string GC; 2244 2245 if (ParseArgumentList(ArgList, isVarArg, false) || 2246 ParseOptionalAttrs(FuncAttrs, 2) || 2247 (EatIfPresent(lltok::kw_section) && 2248 ParseStringConstant(Section)) || 2249 ParseOptionalAlignment(Alignment) || 2250 (EatIfPresent(lltok::kw_gc) && 2251 ParseStringConstant(GC))) 2252 return true; 2253 2254 // If the alignment was parsed as an attribute, move to the alignment field. 2255 if (FuncAttrs & Attribute::Alignment) { 2256 Alignment = Attribute::getAlignmentFromAttrs(FuncAttrs); 2257 FuncAttrs &= ~Attribute::Alignment; 2258 } 2259 2260 // Okay, if we got here, the function is syntactically valid. Convert types 2261 // and do semantic checks. 2262 std::vector<const Type*> ParamTypeList; 2263 SmallVector<AttributeWithIndex, 8> Attrs; 2264 // FIXME : In 3.0, stop accepting zext, sext and inreg as optional function 2265 // attributes. 2266 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 2267 if (FuncAttrs & ObsoleteFuncAttrs) { 2268 RetAttrs |= FuncAttrs & ObsoleteFuncAttrs; 2269 FuncAttrs &= ~ObsoleteFuncAttrs; 2270 } 2271 2272 if (RetAttrs != Attribute::None) 2273 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 2274 2275 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 2276 ParamTypeList.push_back(ArgList[i].Type); 2277 if (ArgList[i].Attrs != Attribute::None) 2278 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 2279 } 2280 2281 if (FuncAttrs != Attribute::None) 2282 Attrs.push_back(AttributeWithIndex::get(~0, FuncAttrs)); 2283 2284 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 2285 2286 if (PAL.paramHasAttr(1, Attribute::StructRet) && 2287 RetType != Type::VoidTy) 2288 return Error(RetTypeLoc, "functions with 'sret' argument must return void"); 2289 2290 const FunctionType *FT = 2291 Context.getFunctionType(RetType, ParamTypeList, isVarArg); 2292 const PointerType *PFT = Context.getPointerTypeUnqual(FT); 2293 2294 Fn = 0; 2295 if (!FunctionName.empty()) { 2296 // If this was a definition of a forward reference, remove the definition 2297 // from the forward reference table and fill in the forward ref. 2298 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator FRVI = 2299 ForwardRefVals.find(FunctionName); 2300 if (FRVI != ForwardRefVals.end()) { 2301 Fn = M->getFunction(FunctionName); 2302 ForwardRefVals.erase(FRVI); 2303 } else if ((Fn = M->getFunction(FunctionName))) { 2304 // If this function already exists in the symbol table, then it is 2305 // multiply defined. We accept a few cases for old backwards compat. 2306 // FIXME: Remove this stuff for LLVM 3.0. 2307 if (Fn->getType() != PFT || Fn->getAttributes() != PAL || 2308 (!Fn->isDeclaration() && isDefine)) { 2309 // If the redefinition has different type or different attributes, 2310 // reject it. If both have bodies, reject it. 2311 return Error(NameLoc, "invalid redefinition of function '" + 2312 FunctionName + "'"); 2313 } else if (Fn->isDeclaration()) { 2314 // Make sure to strip off any argument names so we can't get conflicts. 2315 for (Function::arg_iterator AI = Fn->arg_begin(), AE = Fn->arg_end(); 2316 AI != AE; ++AI) 2317 AI->setName(""); 2318 } 2319 } 2320 2321 } else if (FunctionName.empty()) { 2322 // If this is a definition of a forward referenced function, make sure the 2323 // types agree. 2324 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator I 2325 = ForwardRefValIDs.find(NumberedVals.size()); 2326 if (I != ForwardRefValIDs.end()) { 2327 Fn = cast<Function>(I->second.first); 2328 if (Fn->getType() != PFT) 2329 return Error(NameLoc, "type of definition and forward reference of '@" + 2330 utostr(NumberedVals.size()) +"' disagree"); 2331 ForwardRefValIDs.erase(I); 2332 } 2333 } 2334 2335 if (Fn == 0) 2336 Fn = Function::Create(FT, GlobalValue::ExternalLinkage, FunctionName, M); 2337 else // Move the forward-reference to the correct spot in the module. 2338 M->getFunctionList().splice(M->end(), M->getFunctionList(), Fn); 2339 2340 if (FunctionName.empty()) 2341 NumberedVals.push_back(Fn); 2342 2343 Fn->setLinkage((GlobalValue::LinkageTypes)Linkage); 2344 Fn->setVisibility((GlobalValue::VisibilityTypes)Visibility); 2345 Fn->setCallingConv(CC); 2346 Fn->setAttributes(PAL); 2347 Fn->setAlignment(Alignment); 2348 Fn->setSection(Section); 2349 if (!GC.empty()) Fn->setGC(GC.c_str()); 2350 2351 // Add all of the arguments we parsed to the function. 2352 Function::arg_iterator ArgIt = Fn->arg_begin(); 2353 for (unsigned i = 0, e = ArgList.size(); i != e; ++i, ++ArgIt) { 2354 // If the argument has a name, insert it into the argument symbol table. 2355 if (ArgList[i].Name.empty()) continue; 2356 2357 // Set the name, if it conflicted, it will be auto-renamed. 2358 ArgIt->setName(ArgList[i].Name); 2359 2360 if (ArgIt->getNameStr() != ArgList[i].Name) 2361 return Error(ArgList[i].Loc, "redefinition of argument '%" + 2362 ArgList[i].Name + "'"); 2363 } 2364 2365 return false; 2366} 2367 2368 2369/// ParseFunctionBody 2370/// ::= '{' BasicBlock+ '}' 2371/// ::= 'begin' BasicBlock+ 'end' // FIXME: remove in LLVM 3.0 2372/// 2373bool LLParser::ParseFunctionBody(Function &Fn) { 2374 if (Lex.getKind() != lltok::lbrace && Lex.getKind() != lltok::kw_begin) 2375 return TokError("expected '{' in function body"); 2376 Lex.Lex(); // eat the {. 2377 2378 PerFunctionState PFS(*this, Fn); 2379 2380 while (Lex.getKind() != lltok::rbrace && Lex.getKind() != lltok::kw_end) 2381 if (ParseBasicBlock(PFS)) return true; 2382 2383 // Eat the }. 2384 Lex.Lex(); 2385 2386 // Verify function is ok. 2387 return PFS.VerifyFunctionComplete(); 2388} 2389 2390/// ParseBasicBlock 2391/// ::= LabelStr? Instruction* 2392bool LLParser::ParseBasicBlock(PerFunctionState &PFS) { 2393 // If this basic block starts out with a name, remember it. 2394 std::string Name; 2395 LocTy NameLoc = Lex.getLoc(); 2396 if (Lex.getKind() == lltok::LabelStr) { 2397 Name = Lex.getStrVal(); 2398 Lex.Lex(); 2399 } 2400 2401 BasicBlock *BB = PFS.DefineBB(Name, NameLoc); 2402 if (BB == 0) return true; 2403 2404 std::string NameStr; 2405 2406 // Parse the instructions in this block until we get a terminator. 2407 Instruction *Inst; 2408 do { 2409 // This instruction may have three possibilities for a name: a) none 2410 // specified, b) name specified "%foo =", c) number specified: "%4 =". 2411 LocTy NameLoc = Lex.getLoc(); 2412 int NameID = -1; 2413 NameStr = ""; 2414 2415 if (Lex.getKind() == lltok::LocalVarID) { 2416 NameID = Lex.getUIntVal(); 2417 Lex.Lex(); 2418 if (ParseToken(lltok::equal, "expected '=' after instruction id")) 2419 return true; 2420 } else if (Lex.getKind() == lltok::LocalVar || 2421 // FIXME: REMOVE IN LLVM 3.0 2422 Lex.getKind() == lltok::StringConstant) { 2423 NameStr = Lex.getStrVal(); 2424 Lex.Lex(); 2425 if (ParseToken(lltok::equal, "expected '=' after instruction name")) 2426 return true; 2427 } 2428 2429 if (ParseInstruction(Inst, BB, PFS)) return true; 2430 2431 BB->getInstList().push_back(Inst); 2432 2433 // Set the name on the instruction. 2434 if (PFS.SetInstName(NameID, NameStr, NameLoc, Inst)) return true; 2435 } while (!isa<TerminatorInst>(Inst)); 2436 2437 return false; 2438} 2439 2440//===----------------------------------------------------------------------===// 2441// Instruction Parsing. 2442//===----------------------------------------------------------------------===// 2443 2444/// ParseInstruction - Parse one of the many different instructions. 2445/// 2446bool LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB, 2447 PerFunctionState &PFS) { 2448 lltok::Kind Token = Lex.getKind(); 2449 if (Token == lltok::Eof) 2450 return TokError("found end of file when expecting more instructions"); 2451 LocTy Loc = Lex.getLoc(); 2452 unsigned KeywordVal = Lex.getUIntVal(); 2453 Lex.Lex(); // Eat the keyword. 2454 2455 switch (Token) { 2456 default: return Error(Loc, "expected instruction opcode"); 2457 // Terminator Instructions. 2458 case lltok::kw_unwind: Inst = new UnwindInst(); return false; 2459 case lltok::kw_unreachable: Inst = new UnreachableInst(); return false; 2460 case lltok::kw_ret: return ParseRet(Inst, BB, PFS); 2461 case lltok::kw_br: return ParseBr(Inst, PFS); 2462 case lltok::kw_switch: return ParseSwitch(Inst, PFS); 2463 case lltok::kw_invoke: return ParseInvoke(Inst, PFS); 2464 // Binary Operators. 2465 case lltok::kw_add: 2466 case lltok::kw_sub: 2467 case lltok::kw_mul: 2468 // API compatibility: Accept either integer or floating-point types. 2469 return ParseArithmetic(Inst, PFS, KeywordVal, 0); 2470 case lltok::kw_fadd: 2471 case lltok::kw_fsub: 2472 case lltok::kw_fmul: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2473 2474 case lltok::kw_udiv: 2475 case lltok::kw_sdiv: 2476 case lltok::kw_urem: 2477 case lltok::kw_srem: return ParseArithmetic(Inst, PFS, KeywordVal, 1); 2478 case lltok::kw_fdiv: 2479 case lltok::kw_frem: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2480 case lltok::kw_shl: 2481 case lltok::kw_lshr: 2482 case lltok::kw_ashr: 2483 case lltok::kw_and: 2484 case lltok::kw_or: 2485 case lltok::kw_xor: return ParseLogical(Inst, PFS, KeywordVal); 2486 case lltok::kw_icmp: 2487 case lltok::kw_fcmp: 2488 case lltok::kw_vicmp: 2489 case lltok::kw_vfcmp: return ParseCompare(Inst, PFS, KeywordVal); 2490 // Casts. 2491 case lltok::kw_trunc: 2492 case lltok::kw_zext: 2493 case lltok::kw_sext: 2494 case lltok::kw_fptrunc: 2495 case lltok::kw_fpext: 2496 case lltok::kw_bitcast: 2497 case lltok::kw_uitofp: 2498 case lltok::kw_sitofp: 2499 case lltok::kw_fptoui: 2500 case lltok::kw_fptosi: 2501 case lltok::kw_inttoptr: 2502 case lltok::kw_ptrtoint: return ParseCast(Inst, PFS, KeywordVal); 2503 // Other. 2504 case lltok::kw_select: return ParseSelect(Inst, PFS); 2505 case lltok::kw_va_arg: return ParseVA_Arg(Inst, PFS); 2506 case lltok::kw_extractelement: return ParseExtractElement(Inst, PFS); 2507 case lltok::kw_insertelement: return ParseInsertElement(Inst, PFS); 2508 case lltok::kw_shufflevector: return ParseShuffleVector(Inst, PFS); 2509 case lltok::kw_phi: return ParsePHI(Inst, PFS); 2510 case lltok::kw_call: return ParseCall(Inst, PFS, false); 2511 case lltok::kw_tail: return ParseCall(Inst, PFS, true); 2512 // Memory. 2513 case lltok::kw_alloca: 2514 case lltok::kw_malloc: return ParseAlloc(Inst, PFS, KeywordVal); 2515 case lltok::kw_free: return ParseFree(Inst, PFS); 2516 case lltok::kw_load: return ParseLoad(Inst, PFS, false); 2517 case lltok::kw_store: return ParseStore(Inst, PFS, false); 2518 case lltok::kw_volatile: 2519 if (EatIfPresent(lltok::kw_load)) 2520 return ParseLoad(Inst, PFS, true); 2521 else if (EatIfPresent(lltok::kw_store)) 2522 return ParseStore(Inst, PFS, true); 2523 else 2524 return TokError("expected 'load' or 'store'"); 2525 case lltok::kw_getresult: return ParseGetResult(Inst, PFS); 2526 case lltok::kw_getelementptr: return ParseGetElementPtr(Inst, PFS); 2527 case lltok::kw_extractvalue: return ParseExtractValue(Inst, PFS); 2528 case lltok::kw_insertvalue: return ParseInsertValue(Inst, PFS); 2529 } 2530} 2531 2532/// ParseCmpPredicate - Parse an integer or fp predicate, based on Kind. 2533bool LLParser::ParseCmpPredicate(unsigned &P, unsigned Opc) { 2534 // FIXME: REMOVE vicmp/vfcmp! 2535 if (Opc == Instruction::FCmp || Opc == Instruction::VFCmp) { 2536 switch (Lex.getKind()) { 2537 default: TokError("expected fcmp predicate (e.g. 'oeq')"); 2538 case lltok::kw_oeq: P = CmpInst::FCMP_OEQ; break; 2539 case lltok::kw_one: P = CmpInst::FCMP_ONE; break; 2540 case lltok::kw_olt: P = CmpInst::FCMP_OLT; break; 2541 case lltok::kw_ogt: P = CmpInst::FCMP_OGT; break; 2542 case lltok::kw_ole: P = CmpInst::FCMP_OLE; break; 2543 case lltok::kw_oge: P = CmpInst::FCMP_OGE; break; 2544 case lltok::kw_ord: P = CmpInst::FCMP_ORD; break; 2545 case lltok::kw_uno: P = CmpInst::FCMP_UNO; break; 2546 case lltok::kw_ueq: P = CmpInst::FCMP_UEQ; break; 2547 case lltok::kw_une: P = CmpInst::FCMP_UNE; break; 2548 case lltok::kw_ult: P = CmpInst::FCMP_ULT; break; 2549 case lltok::kw_ugt: P = CmpInst::FCMP_UGT; break; 2550 case lltok::kw_ule: P = CmpInst::FCMP_ULE; break; 2551 case lltok::kw_uge: P = CmpInst::FCMP_UGE; break; 2552 case lltok::kw_true: P = CmpInst::FCMP_TRUE; break; 2553 case lltok::kw_false: P = CmpInst::FCMP_FALSE; break; 2554 } 2555 } else { 2556 switch (Lex.getKind()) { 2557 default: TokError("expected icmp predicate (e.g. 'eq')"); 2558 case lltok::kw_eq: P = CmpInst::ICMP_EQ; break; 2559 case lltok::kw_ne: P = CmpInst::ICMP_NE; break; 2560 case lltok::kw_slt: P = CmpInst::ICMP_SLT; break; 2561 case lltok::kw_sgt: P = CmpInst::ICMP_SGT; break; 2562 case lltok::kw_sle: P = CmpInst::ICMP_SLE; break; 2563 case lltok::kw_sge: P = CmpInst::ICMP_SGE; break; 2564 case lltok::kw_ult: P = CmpInst::ICMP_ULT; break; 2565 case lltok::kw_ugt: P = CmpInst::ICMP_UGT; break; 2566 case lltok::kw_ule: P = CmpInst::ICMP_ULE; break; 2567 case lltok::kw_uge: P = CmpInst::ICMP_UGE; break; 2568 } 2569 } 2570 Lex.Lex(); 2571 return false; 2572} 2573 2574//===----------------------------------------------------------------------===// 2575// Terminator Instructions. 2576//===----------------------------------------------------------------------===// 2577 2578/// ParseRet - Parse a return instruction. 2579/// ::= 'ret' void 2580/// ::= 'ret' TypeAndValue 2581/// ::= 'ret' TypeAndValue (',' TypeAndValue)+ [[obsolete: LLVM 3.0]] 2582bool LLParser::ParseRet(Instruction *&Inst, BasicBlock *BB, 2583 PerFunctionState &PFS) { 2584 PATypeHolder Ty(Type::VoidTy); 2585 if (ParseType(Ty, true /*void allowed*/)) return true; 2586 2587 if (Ty == Type::VoidTy) { 2588 Inst = ReturnInst::Create(); 2589 return false; 2590 } 2591 2592 Value *RV; 2593 if (ParseValue(Ty, RV, PFS)) return true; 2594 2595 // The normal case is one return value. 2596 if (Lex.getKind() == lltok::comma) { 2597 // FIXME: LLVM 3.0 remove MRV support for 'ret i32 1, i32 2', requiring use 2598 // of 'ret {i32,i32} {i32 1, i32 2}' 2599 SmallVector<Value*, 8> RVs; 2600 RVs.push_back(RV); 2601 2602 while (EatIfPresent(lltok::comma)) { 2603 if (ParseTypeAndValue(RV, PFS)) return true; 2604 RVs.push_back(RV); 2605 } 2606 2607 RV = Context.getUndef(PFS.getFunction().getReturnType()); 2608 for (unsigned i = 0, e = RVs.size(); i != e; ++i) { 2609 Instruction *I = InsertValueInst::Create(RV, RVs[i], i, "mrv"); 2610 BB->getInstList().push_back(I); 2611 RV = I; 2612 } 2613 } 2614 Inst = ReturnInst::Create(RV); 2615 return false; 2616} 2617 2618 2619/// ParseBr 2620/// ::= 'br' TypeAndValue 2621/// ::= 'br' TypeAndValue ',' TypeAndValue ',' TypeAndValue 2622bool LLParser::ParseBr(Instruction *&Inst, PerFunctionState &PFS) { 2623 LocTy Loc, Loc2; 2624 Value *Op0, *Op1, *Op2; 2625 if (ParseTypeAndValue(Op0, Loc, PFS)) return true; 2626 2627 if (BasicBlock *BB = dyn_cast<BasicBlock>(Op0)) { 2628 Inst = BranchInst::Create(BB); 2629 return false; 2630 } 2631 2632 if (Op0->getType() != Type::Int1Ty) 2633 return Error(Loc, "branch condition must have 'i1' type"); 2634 2635 if (ParseToken(lltok::comma, "expected ',' after branch condition") || 2636 ParseTypeAndValue(Op1, Loc, PFS) || 2637 ParseToken(lltok::comma, "expected ',' after true destination") || 2638 ParseTypeAndValue(Op2, Loc2, PFS)) 2639 return true; 2640 2641 if (!isa<BasicBlock>(Op1)) 2642 return Error(Loc, "true destination of branch must be a basic block"); 2643 if (!isa<BasicBlock>(Op2)) 2644 return Error(Loc2, "true destination of branch must be a basic block"); 2645 2646 Inst = BranchInst::Create(cast<BasicBlock>(Op1), cast<BasicBlock>(Op2), Op0); 2647 return false; 2648} 2649 2650/// ParseSwitch 2651/// Instruction 2652/// ::= 'switch' TypeAndValue ',' TypeAndValue '[' JumpTable ']' 2653/// JumpTable 2654/// ::= (TypeAndValue ',' TypeAndValue)* 2655bool LLParser::ParseSwitch(Instruction *&Inst, PerFunctionState &PFS) { 2656 LocTy CondLoc, BBLoc; 2657 Value *Cond, *DefaultBB; 2658 if (ParseTypeAndValue(Cond, CondLoc, PFS) || 2659 ParseToken(lltok::comma, "expected ',' after switch condition") || 2660 ParseTypeAndValue(DefaultBB, BBLoc, PFS) || 2661 ParseToken(lltok::lsquare, "expected '[' with switch table")) 2662 return true; 2663 2664 if (!isa<IntegerType>(Cond->getType())) 2665 return Error(CondLoc, "switch condition must have integer type"); 2666 if (!isa<BasicBlock>(DefaultBB)) 2667 return Error(BBLoc, "default destination must be a basic block"); 2668 2669 // Parse the jump table pairs. 2670 SmallPtrSet<Value*, 32> SeenCases; 2671 SmallVector<std::pair<ConstantInt*, BasicBlock*>, 32> Table; 2672 while (Lex.getKind() != lltok::rsquare) { 2673 Value *Constant, *DestBB; 2674 2675 if (ParseTypeAndValue(Constant, CondLoc, PFS) || 2676 ParseToken(lltok::comma, "expected ',' after case value") || 2677 ParseTypeAndValue(DestBB, BBLoc, PFS)) 2678 return true; 2679 2680 if (!SeenCases.insert(Constant)) 2681 return Error(CondLoc, "duplicate case value in switch"); 2682 if (!isa<ConstantInt>(Constant)) 2683 return Error(CondLoc, "case value is not a constant integer"); 2684 if (!isa<BasicBlock>(DestBB)) 2685 return Error(BBLoc, "case destination is not a basic block"); 2686 2687 Table.push_back(std::make_pair(cast<ConstantInt>(Constant), 2688 cast<BasicBlock>(DestBB))); 2689 } 2690 2691 Lex.Lex(); // Eat the ']'. 2692 2693 SwitchInst *SI = SwitchInst::Create(Cond, cast<BasicBlock>(DefaultBB), 2694 Table.size()); 2695 for (unsigned i = 0, e = Table.size(); i != e; ++i) 2696 SI->addCase(Table[i].first, Table[i].second); 2697 Inst = SI; 2698 return false; 2699} 2700 2701/// ParseInvoke 2702/// ::= 'invoke' OptionalCallingConv OptionalAttrs Type Value ParamList 2703/// OptionalAttrs 'to' TypeAndValue 'unwind' TypeAndValue 2704bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) { 2705 LocTy CallLoc = Lex.getLoc(); 2706 unsigned CC, RetAttrs, FnAttrs; 2707 PATypeHolder RetType(Type::VoidTy); 2708 LocTy RetTypeLoc; 2709 ValID CalleeID; 2710 SmallVector<ParamInfo, 16> ArgList; 2711 2712 Value *NormalBB, *UnwindBB; 2713 if (ParseOptionalCallingConv(CC) || 2714 ParseOptionalAttrs(RetAttrs, 1) || 2715 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 2716 ParseValID(CalleeID) || 2717 ParseParameterList(ArgList, PFS) || 2718 ParseOptionalAttrs(FnAttrs, 2) || 2719 ParseToken(lltok::kw_to, "expected 'to' in invoke") || 2720 ParseTypeAndValue(NormalBB, PFS) || 2721 ParseToken(lltok::kw_unwind, "expected 'unwind' in invoke") || 2722 ParseTypeAndValue(UnwindBB, PFS)) 2723 return true; 2724 2725 if (!isa<BasicBlock>(NormalBB)) 2726 return Error(CallLoc, "normal destination is not a basic block"); 2727 if (!isa<BasicBlock>(UnwindBB)) 2728 return Error(CallLoc, "unwind destination is not a basic block"); 2729 2730 // If RetType is a non-function pointer type, then this is the short syntax 2731 // for the call, which means that RetType is just the return type. Infer the 2732 // rest of the function argument types from the arguments that are present. 2733 const PointerType *PFTy = 0; 2734 const FunctionType *Ty = 0; 2735 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 2736 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 2737 // Pull out the types of all of the arguments... 2738 std::vector<const Type*> ParamTypes; 2739 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 2740 ParamTypes.push_back(ArgList[i].V->getType()); 2741 2742 if (!FunctionType::isValidReturnType(RetType)) 2743 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 2744 2745 Ty = Context.getFunctionType(RetType, ParamTypes, false); 2746 PFTy = Context.getPointerTypeUnqual(Ty); 2747 } 2748 2749 // Look up the callee. 2750 Value *Callee; 2751 if (ConvertValIDToValue(PFTy, CalleeID, Callee, PFS)) return true; 2752 2753 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 2754 // function attributes. 2755 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 2756 if (FnAttrs & ObsoleteFuncAttrs) { 2757 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 2758 FnAttrs &= ~ObsoleteFuncAttrs; 2759 } 2760 2761 // Set up the Attributes for the function. 2762 SmallVector<AttributeWithIndex, 8> Attrs; 2763 if (RetAttrs != Attribute::None) 2764 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 2765 2766 SmallVector<Value*, 8> Args; 2767 2768 // Loop through FunctionType's arguments and ensure they are specified 2769 // correctly. Also, gather any parameter attributes. 2770 FunctionType::param_iterator I = Ty->param_begin(); 2771 FunctionType::param_iterator E = Ty->param_end(); 2772 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 2773 const Type *ExpectedTy = 0; 2774 if (I != E) { 2775 ExpectedTy = *I++; 2776 } else if (!Ty->isVarArg()) { 2777 return Error(ArgList[i].Loc, "too many arguments specified"); 2778 } 2779 2780 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 2781 return Error(ArgList[i].Loc, "argument is not of expected type '" + 2782 ExpectedTy->getDescription() + "'"); 2783 Args.push_back(ArgList[i].V); 2784 if (ArgList[i].Attrs != Attribute::None) 2785 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 2786 } 2787 2788 if (I != E) 2789 return Error(CallLoc, "not enough parameters specified for call"); 2790 2791 if (FnAttrs != Attribute::None) 2792 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 2793 2794 // Finish off the Attributes and check them 2795 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 2796 2797 InvokeInst *II = InvokeInst::Create(Callee, cast<BasicBlock>(NormalBB), 2798 cast<BasicBlock>(UnwindBB), 2799 Args.begin(), Args.end()); 2800 II->setCallingConv(CC); 2801 II->setAttributes(PAL); 2802 Inst = II; 2803 return false; 2804} 2805 2806 2807 2808//===----------------------------------------------------------------------===// 2809// Binary Operators. 2810//===----------------------------------------------------------------------===// 2811 2812/// ParseArithmetic 2813/// ::= ArithmeticOps TypeAndValue ',' Value 2814/// 2815/// If OperandType is 0, then any FP or integer operand is allowed. If it is 1, 2816/// then any integer operand is allowed, if it is 2, any fp operand is allowed. 2817bool LLParser::ParseArithmetic(Instruction *&Inst, PerFunctionState &PFS, 2818 unsigned Opc, unsigned OperandType) { 2819 LocTy Loc; Value *LHS, *RHS; 2820 if (ParseTypeAndValue(LHS, Loc, PFS) || 2821 ParseToken(lltok::comma, "expected ',' in arithmetic operation") || 2822 ParseValue(LHS->getType(), RHS, PFS)) 2823 return true; 2824 2825 bool Valid; 2826 switch (OperandType) { 2827 default: assert(0 && "Unknown operand type!"); 2828 case 0: // int or FP. 2829 Valid = LHS->getType()->isIntOrIntVector() || 2830 LHS->getType()->isFPOrFPVector(); 2831 break; 2832 case 1: Valid = LHS->getType()->isIntOrIntVector(); break; 2833 case 2: Valid = LHS->getType()->isFPOrFPVector(); break; 2834 } 2835 2836 if (!Valid) 2837 return Error(Loc, "invalid operand type for instruction"); 2838 2839 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 2840 return false; 2841} 2842 2843/// ParseLogical 2844/// ::= ArithmeticOps TypeAndValue ',' Value { 2845bool LLParser::ParseLogical(Instruction *&Inst, PerFunctionState &PFS, 2846 unsigned Opc) { 2847 LocTy Loc; Value *LHS, *RHS; 2848 if (ParseTypeAndValue(LHS, Loc, PFS) || 2849 ParseToken(lltok::comma, "expected ',' in logical operation") || 2850 ParseValue(LHS->getType(), RHS, PFS)) 2851 return true; 2852 2853 if (!LHS->getType()->isIntOrIntVector()) 2854 return Error(Loc,"instruction requires integer or integer vector operands"); 2855 2856 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 2857 return false; 2858} 2859 2860 2861/// ParseCompare 2862/// ::= 'icmp' IPredicates TypeAndValue ',' Value 2863/// ::= 'fcmp' FPredicates TypeAndValue ',' Value 2864/// ::= 'vicmp' IPredicates TypeAndValue ',' Value 2865/// ::= 'vfcmp' FPredicates TypeAndValue ',' Value 2866bool LLParser::ParseCompare(Instruction *&Inst, PerFunctionState &PFS, 2867 unsigned Opc) { 2868 // Parse the integer/fp comparison predicate. 2869 LocTy Loc; 2870 unsigned Pred; 2871 Value *LHS, *RHS; 2872 if (ParseCmpPredicate(Pred, Opc) || 2873 ParseTypeAndValue(LHS, Loc, PFS) || 2874 ParseToken(lltok::comma, "expected ',' after compare value") || 2875 ParseValue(LHS->getType(), RHS, PFS)) 2876 return true; 2877 2878 if (Opc == Instruction::FCmp) { 2879 if (!LHS->getType()->isFPOrFPVector()) 2880 return Error(Loc, "fcmp requires floating point operands"); 2881 Inst = new FCmpInst(CmpInst::Predicate(Pred), LHS, RHS); 2882 } else if (Opc == Instruction::ICmp) { 2883 if (!LHS->getType()->isIntOrIntVector() && 2884 !isa<PointerType>(LHS->getType())) 2885 return Error(Loc, "icmp requires integer operands"); 2886 Inst = new ICmpInst(CmpInst::Predicate(Pred), LHS, RHS); 2887 } else if (Opc == Instruction::VFCmp) { 2888 if (!LHS->getType()->isFPOrFPVector() || !isa<VectorType>(LHS->getType())) 2889 return Error(Loc, "vfcmp requires vector floating point operands"); 2890 Inst = new VFCmpInst(CmpInst::Predicate(Pred), LHS, RHS); 2891 } else if (Opc == Instruction::VICmp) { 2892 if (!LHS->getType()->isIntOrIntVector() || !isa<VectorType>(LHS->getType())) 2893 return Error(Loc, "vicmp requires vector floating point operands"); 2894 Inst = new VICmpInst(CmpInst::Predicate(Pred), LHS, RHS); 2895 } 2896 return false; 2897} 2898 2899//===----------------------------------------------------------------------===// 2900// Other Instructions. 2901//===----------------------------------------------------------------------===// 2902 2903 2904/// ParseCast 2905/// ::= CastOpc TypeAndValue 'to' Type 2906bool LLParser::ParseCast(Instruction *&Inst, PerFunctionState &PFS, 2907 unsigned Opc) { 2908 LocTy Loc; Value *Op; 2909 PATypeHolder DestTy(Type::VoidTy); 2910 if (ParseTypeAndValue(Op, Loc, PFS) || 2911 ParseToken(lltok::kw_to, "expected 'to' after cast value") || 2912 ParseType(DestTy)) 2913 return true; 2914 2915 if (!CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy)) { 2916 CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy); 2917 return Error(Loc, "invalid cast opcode for cast from '" + 2918 Op->getType()->getDescription() + "' to '" + 2919 DestTy->getDescription() + "'"); 2920 } 2921 Inst = CastInst::Create((Instruction::CastOps)Opc, Op, DestTy); 2922 return false; 2923} 2924 2925/// ParseSelect 2926/// ::= 'select' TypeAndValue ',' TypeAndValue ',' TypeAndValue 2927bool LLParser::ParseSelect(Instruction *&Inst, PerFunctionState &PFS) { 2928 LocTy Loc; 2929 Value *Op0, *Op1, *Op2; 2930 if (ParseTypeAndValue(Op0, Loc, PFS) || 2931 ParseToken(lltok::comma, "expected ',' after select condition") || 2932 ParseTypeAndValue(Op1, PFS) || 2933 ParseToken(lltok::comma, "expected ',' after select value") || 2934 ParseTypeAndValue(Op2, PFS)) 2935 return true; 2936 2937 if (const char *Reason = SelectInst::areInvalidOperands(Op0, Op1, Op2)) 2938 return Error(Loc, Reason); 2939 2940 Inst = SelectInst::Create(Op0, Op1, Op2); 2941 return false; 2942} 2943 2944/// ParseVA_Arg 2945/// ::= 'va_arg' TypeAndValue ',' Type 2946bool LLParser::ParseVA_Arg(Instruction *&Inst, PerFunctionState &PFS) { 2947 Value *Op; 2948 PATypeHolder EltTy(Type::VoidTy); 2949 LocTy TypeLoc; 2950 if (ParseTypeAndValue(Op, PFS) || 2951 ParseToken(lltok::comma, "expected ',' after vaarg operand") || 2952 ParseType(EltTy, TypeLoc)) 2953 return true; 2954 2955 if (!EltTy->isFirstClassType()) 2956 return Error(TypeLoc, "va_arg requires operand with first class type"); 2957 2958 Inst = new VAArgInst(Op, EltTy); 2959 return false; 2960} 2961 2962/// ParseExtractElement 2963/// ::= 'extractelement' TypeAndValue ',' TypeAndValue 2964bool LLParser::ParseExtractElement(Instruction *&Inst, PerFunctionState &PFS) { 2965 LocTy Loc; 2966 Value *Op0, *Op1; 2967 if (ParseTypeAndValue(Op0, Loc, PFS) || 2968 ParseToken(lltok::comma, "expected ',' after extract value") || 2969 ParseTypeAndValue(Op1, PFS)) 2970 return true; 2971 2972 if (!ExtractElementInst::isValidOperands(Op0, Op1)) 2973 return Error(Loc, "invalid extractelement operands"); 2974 2975 Inst = new ExtractElementInst(Op0, Op1); 2976 return false; 2977} 2978 2979/// ParseInsertElement 2980/// ::= 'insertelement' TypeAndValue ',' TypeAndValue ',' TypeAndValue 2981bool LLParser::ParseInsertElement(Instruction *&Inst, PerFunctionState &PFS) { 2982 LocTy Loc; 2983 Value *Op0, *Op1, *Op2; 2984 if (ParseTypeAndValue(Op0, Loc, PFS) || 2985 ParseToken(lltok::comma, "expected ',' after insertelement value") || 2986 ParseTypeAndValue(Op1, PFS) || 2987 ParseToken(lltok::comma, "expected ',' after insertelement value") || 2988 ParseTypeAndValue(Op2, PFS)) 2989 return true; 2990 2991 if (!InsertElementInst::isValidOperands(Op0, Op1, Op2)) 2992 return Error(Loc, "invalid extractelement operands"); 2993 2994 Inst = InsertElementInst::Create(Op0, Op1, Op2); 2995 return false; 2996} 2997 2998/// ParseShuffleVector 2999/// ::= 'shufflevector' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3000bool LLParser::ParseShuffleVector(Instruction *&Inst, PerFunctionState &PFS) { 3001 LocTy Loc; 3002 Value *Op0, *Op1, *Op2; 3003 if (ParseTypeAndValue(Op0, Loc, PFS) || 3004 ParseToken(lltok::comma, "expected ',' after shuffle mask") || 3005 ParseTypeAndValue(Op1, PFS) || 3006 ParseToken(lltok::comma, "expected ',' after shuffle value") || 3007 ParseTypeAndValue(Op2, PFS)) 3008 return true; 3009 3010 if (!ShuffleVectorInst::isValidOperands(Op0, Op1, Op2)) 3011 return Error(Loc, "invalid extractelement operands"); 3012 3013 Inst = new ShuffleVectorInst(Op0, Op1, Op2); 3014 return false; 3015} 3016 3017/// ParsePHI 3018/// ::= 'phi' Type '[' Value ',' Value ']' (',' '[' Value ',' Valueß ']')* 3019bool LLParser::ParsePHI(Instruction *&Inst, PerFunctionState &PFS) { 3020 PATypeHolder Ty(Type::VoidTy); 3021 Value *Op0, *Op1; 3022 LocTy TypeLoc = Lex.getLoc(); 3023 3024 if (ParseType(Ty) || 3025 ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3026 ParseValue(Ty, Op0, PFS) || 3027 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3028 ParseValue(Type::LabelTy, Op1, PFS) || 3029 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3030 return true; 3031 3032 SmallVector<std::pair<Value*, BasicBlock*>, 16> PHIVals; 3033 while (1) { 3034 PHIVals.push_back(std::make_pair(Op0, cast<BasicBlock>(Op1))); 3035 3036 if (!EatIfPresent(lltok::comma)) 3037 break; 3038 3039 if (ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3040 ParseValue(Ty, Op0, PFS) || 3041 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3042 ParseValue(Type::LabelTy, Op1, PFS) || 3043 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3044 return true; 3045 } 3046 3047 if (!Ty->isFirstClassType()) 3048 return Error(TypeLoc, "phi node must have first class type"); 3049 3050 PHINode *PN = PHINode::Create(Ty); 3051 PN->reserveOperandSpace(PHIVals.size()); 3052 for (unsigned i = 0, e = PHIVals.size(); i != e; ++i) 3053 PN->addIncoming(PHIVals[i].first, PHIVals[i].second); 3054 Inst = PN; 3055 return false; 3056} 3057 3058/// ParseCall 3059/// ::= 'tail'? 'call' OptionalCallingConv OptionalAttrs Type Value 3060/// ParameterList OptionalAttrs 3061bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS, 3062 bool isTail) { 3063 unsigned CC, RetAttrs, FnAttrs; 3064 PATypeHolder RetType(Type::VoidTy); 3065 LocTy RetTypeLoc; 3066 ValID CalleeID; 3067 SmallVector<ParamInfo, 16> ArgList; 3068 LocTy CallLoc = Lex.getLoc(); 3069 3070 if ((isTail && ParseToken(lltok::kw_call, "expected 'tail call'")) || 3071 ParseOptionalCallingConv(CC) || 3072 ParseOptionalAttrs(RetAttrs, 1) || 3073 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3074 ParseValID(CalleeID) || 3075 ParseParameterList(ArgList, PFS) || 3076 ParseOptionalAttrs(FnAttrs, 2)) 3077 return true; 3078 3079 // If RetType is a non-function pointer type, then this is the short syntax 3080 // for the call, which means that RetType is just the return type. Infer the 3081 // rest of the function argument types from the arguments that are present. 3082 const PointerType *PFTy = 0; 3083 const FunctionType *Ty = 0; 3084 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3085 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3086 // Pull out the types of all of the arguments... 3087 std::vector<const Type*> ParamTypes; 3088 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3089 ParamTypes.push_back(ArgList[i].V->getType()); 3090 3091 if (!FunctionType::isValidReturnType(RetType)) 3092 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3093 3094 Ty = Context.getFunctionType(RetType, ParamTypes, false); 3095 PFTy = Context.getPointerTypeUnqual(Ty); 3096 } 3097 3098 // Look up the callee. 3099 Value *Callee; 3100 if (ConvertValIDToValue(PFTy, CalleeID, Callee, PFS)) return true; 3101 3102 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 3103 // function attributes. 3104 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 3105 if (FnAttrs & ObsoleteFuncAttrs) { 3106 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 3107 FnAttrs &= ~ObsoleteFuncAttrs; 3108 } 3109 3110 // Set up the Attributes for the function. 3111 SmallVector<AttributeWithIndex, 8> Attrs; 3112 if (RetAttrs != Attribute::None) 3113 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3114 3115 SmallVector<Value*, 8> Args; 3116 3117 // Loop through FunctionType's arguments and ensure they are specified 3118 // correctly. Also, gather any parameter attributes. 3119 FunctionType::param_iterator I = Ty->param_begin(); 3120 FunctionType::param_iterator E = Ty->param_end(); 3121 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3122 const Type *ExpectedTy = 0; 3123 if (I != E) { 3124 ExpectedTy = *I++; 3125 } else if (!Ty->isVarArg()) { 3126 return Error(ArgList[i].Loc, "too many arguments specified"); 3127 } 3128 3129 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3130 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3131 ExpectedTy->getDescription() + "'"); 3132 Args.push_back(ArgList[i].V); 3133 if (ArgList[i].Attrs != Attribute::None) 3134 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3135 } 3136 3137 if (I != E) 3138 return Error(CallLoc, "not enough parameters specified for call"); 3139 3140 if (FnAttrs != Attribute::None) 3141 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3142 3143 // Finish off the Attributes and check them 3144 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3145 3146 CallInst *CI = CallInst::Create(Callee, Args.begin(), Args.end()); 3147 CI->setTailCall(isTail); 3148 CI->setCallingConv(CC); 3149 CI->setAttributes(PAL); 3150 Inst = CI; 3151 return false; 3152} 3153 3154//===----------------------------------------------------------------------===// 3155// Memory Instructions. 3156//===----------------------------------------------------------------------===// 3157 3158/// ParseAlloc 3159/// ::= 'malloc' Type (',' TypeAndValue)? (',' OptionalAlignment)? 3160/// ::= 'alloca' Type (',' TypeAndValue)? (',' OptionalAlignment)? 3161bool LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS, 3162 unsigned Opc) { 3163 PATypeHolder Ty(Type::VoidTy); 3164 Value *Size = 0; 3165 LocTy SizeLoc = 0; 3166 unsigned Alignment = 0; 3167 if (ParseType(Ty)) return true; 3168 3169 if (EatIfPresent(lltok::comma)) { 3170 if (Lex.getKind() == lltok::kw_align) { 3171 if (ParseOptionalAlignment(Alignment)) return true; 3172 } else if (ParseTypeAndValue(Size, SizeLoc, PFS) || 3173 ParseOptionalCommaAlignment(Alignment)) { 3174 return true; 3175 } 3176 } 3177 3178 if (Size && Size->getType() != Type::Int32Ty) 3179 return Error(SizeLoc, "element count must be i32"); 3180 3181 if (Opc == Instruction::Malloc) 3182 Inst = new MallocInst(Ty, Size, Alignment); 3183 else 3184 Inst = new AllocaInst(Ty, Size, Alignment); 3185 return false; 3186} 3187 3188/// ParseFree 3189/// ::= 'free' TypeAndValue 3190bool LLParser::ParseFree(Instruction *&Inst, PerFunctionState &PFS) { 3191 Value *Val; LocTy Loc; 3192 if (ParseTypeAndValue(Val, Loc, PFS)) return true; 3193 if (!isa<PointerType>(Val->getType())) 3194 return Error(Loc, "operand to free must be a pointer"); 3195 Inst = new FreeInst(Val); 3196 return false; 3197} 3198 3199/// ParseLoad 3200/// ::= 'volatile'? 'load' TypeAndValue (',' 'align' i32)? 3201bool LLParser::ParseLoad(Instruction *&Inst, PerFunctionState &PFS, 3202 bool isVolatile) { 3203 Value *Val; LocTy Loc; 3204 unsigned Alignment; 3205 if (ParseTypeAndValue(Val, Loc, PFS) || 3206 ParseOptionalCommaAlignment(Alignment)) 3207 return true; 3208 3209 if (!isa<PointerType>(Val->getType()) || 3210 !cast<PointerType>(Val->getType())->getElementType()->isFirstClassType()) 3211 return Error(Loc, "load operand must be a pointer to a first class type"); 3212 3213 Inst = new LoadInst(Val, "", isVolatile, Alignment); 3214 return false; 3215} 3216 3217/// ParseStore 3218/// ::= 'volatile'? 'store' TypeAndValue ',' TypeAndValue (',' 'align' i32)? 3219bool LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS, 3220 bool isVolatile) { 3221 Value *Val, *Ptr; LocTy Loc, PtrLoc; 3222 unsigned Alignment; 3223 if (ParseTypeAndValue(Val, Loc, PFS) || 3224 ParseToken(lltok::comma, "expected ',' after store operand") || 3225 ParseTypeAndValue(Ptr, PtrLoc, PFS) || 3226 ParseOptionalCommaAlignment(Alignment)) 3227 return true; 3228 3229 if (!isa<PointerType>(Ptr->getType())) 3230 return Error(PtrLoc, "store operand must be a pointer"); 3231 if (!Val->getType()->isFirstClassType()) 3232 return Error(Loc, "store operand must be a first class value"); 3233 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType()) 3234 return Error(Loc, "stored value and pointer type do not match"); 3235 3236 Inst = new StoreInst(Val, Ptr, isVolatile, Alignment); 3237 return false; 3238} 3239 3240/// ParseGetResult 3241/// ::= 'getresult' TypeAndValue ',' i32 3242/// FIXME: Remove support for getresult in LLVM 3.0 3243bool LLParser::ParseGetResult(Instruction *&Inst, PerFunctionState &PFS) { 3244 Value *Val; LocTy ValLoc, EltLoc; 3245 unsigned Element; 3246 if (ParseTypeAndValue(Val, ValLoc, PFS) || 3247 ParseToken(lltok::comma, "expected ',' after getresult operand") || 3248 ParseUInt32(Element, EltLoc)) 3249 return true; 3250 3251 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 3252 return Error(ValLoc, "getresult inst requires an aggregate operand"); 3253 if (!ExtractValueInst::getIndexedType(Val->getType(), Element)) 3254 return Error(EltLoc, "invalid getresult index for value"); 3255 Inst = ExtractValueInst::Create(Val, Element); 3256 return false; 3257} 3258 3259/// ParseGetElementPtr 3260/// ::= 'getelementptr' TypeAndValue (',' TypeAndValue)* 3261bool LLParser::ParseGetElementPtr(Instruction *&Inst, PerFunctionState &PFS) { 3262 Value *Ptr, *Val; LocTy Loc, EltLoc; 3263 if (ParseTypeAndValue(Ptr, Loc, PFS)) return true; 3264 3265 if (!isa<PointerType>(Ptr->getType())) 3266 return Error(Loc, "base of getelementptr must be a pointer"); 3267 3268 SmallVector<Value*, 16> Indices; 3269 while (EatIfPresent(lltok::comma)) { 3270 if (ParseTypeAndValue(Val, EltLoc, PFS)) return true; 3271 if (!isa<IntegerType>(Val->getType())) 3272 return Error(EltLoc, "getelementptr index must be an integer"); 3273 Indices.push_back(Val); 3274 } 3275 3276 if (!GetElementPtrInst::getIndexedType(Ptr->getType(), 3277 Indices.begin(), Indices.end())) 3278 return Error(Loc, "invalid getelementptr indices"); 3279 Inst = GetElementPtrInst::Create(Ptr, Indices.begin(), Indices.end()); 3280 return false; 3281} 3282 3283/// ParseExtractValue 3284/// ::= 'extractvalue' TypeAndValue (',' uint32)+ 3285bool LLParser::ParseExtractValue(Instruction *&Inst, PerFunctionState &PFS) { 3286 Value *Val; LocTy Loc; 3287 SmallVector<unsigned, 4> Indices; 3288 if (ParseTypeAndValue(Val, Loc, PFS) || 3289 ParseIndexList(Indices)) 3290 return true; 3291 3292 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 3293 return Error(Loc, "extractvalue operand must be array or struct"); 3294 3295 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 3296 Indices.end())) 3297 return Error(Loc, "invalid indices for extractvalue"); 3298 Inst = ExtractValueInst::Create(Val, Indices.begin(), Indices.end()); 3299 return false; 3300} 3301 3302/// ParseInsertValue 3303/// ::= 'insertvalue' TypeAndValue ',' TypeAndValue (',' uint32)+ 3304bool LLParser::ParseInsertValue(Instruction *&Inst, PerFunctionState &PFS) { 3305 Value *Val0, *Val1; LocTy Loc0, Loc1; 3306 SmallVector<unsigned, 4> Indices; 3307 if (ParseTypeAndValue(Val0, Loc0, PFS) || 3308 ParseToken(lltok::comma, "expected comma after insertvalue operand") || 3309 ParseTypeAndValue(Val1, Loc1, PFS) || 3310 ParseIndexList(Indices)) 3311 return true; 3312 3313 if (!isa<StructType>(Val0->getType()) && !isa<ArrayType>(Val0->getType())) 3314 return Error(Loc0, "extractvalue operand must be array or struct"); 3315 3316 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 3317 Indices.end())) 3318 return Error(Loc0, "invalid indices for insertvalue"); 3319 Inst = InsertValueInst::Create(Val0, Val1, Indices.begin(), Indices.end()); 3320 return false; 3321} 3322 3323//===----------------------------------------------------------------------===// 3324// Embedded metadata. 3325//===----------------------------------------------------------------------===// 3326 3327/// ParseMDNodeVector 3328/// ::= Element (',' Element)* 3329/// Element 3330/// ::= 'null' | TypeAndValue 3331bool LLParser::ParseMDNodeVector(SmallVectorImpl<Value*> &Elts) { 3332 assert(Lex.getKind() == lltok::lbrace); 3333 Lex.Lex(); 3334 do { 3335 Value *V; 3336 if (Lex.getKind() == lltok::kw_null) { 3337 Lex.Lex(); 3338 V = 0; 3339 } else { 3340 Constant *C; 3341 if (ParseGlobalTypeAndValue(C)) return true; 3342 V = C; 3343 } 3344 Elts.push_back(V); 3345 } while (EatIfPresent(lltok::comma)); 3346 3347 return false; 3348} 3349