LLParser.cpp revision 1fd7096407d5e598ed3366a1141548e71273f1c5
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/Operator.h" 25#include "llvm/ValueSymbolTable.h" 26#include "llvm/ADT/SmallPtrSet.h" 27#include "llvm/ADT/StringExtras.h" 28#include "llvm/Support/ErrorHandling.h" 29#include "llvm/Support/raw_ostream.h" 30using namespace llvm; 31 32namespace llvm { 33 /// ValID - Represents a reference of a definition of some sort with no type. 34 /// There are several cases where we have to parse the value but where the 35 /// type can depend on later context. This may either be a numeric reference 36 /// or a symbolic (%var) reference. This is just a discriminated union. 37 struct ValID { 38 enum { 39 t_LocalID, t_GlobalID, // ID in UIntVal. 40 t_LocalName, t_GlobalName, // Name in StrVal. 41 t_APSInt, t_APFloat, // Value in APSIntVal/APFloatVal. 42 t_Null, t_Undef, t_Zero, // No value. 43 t_EmptyArray, // No value: [] 44 t_Constant, // Value in ConstantVal. 45 t_InlineAsm, // Value in StrVal/StrVal2/UIntVal. 46 t_Metadata // Value in MetadataVal. 47 } Kind; 48 49 LLParser::LocTy Loc; 50 unsigned UIntVal; 51 std::string StrVal, StrVal2; 52 APSInt APSIntVal; 53 APFloat APFloatVal; 54 Constant *ConstantVal; 55 MetadataBase *MetadataVal; 56 ValID() : APFloatVal(0.0) {} 57 }; 58} 59 60/// Run: module ::= toplevelentity* 61bool LLParser::Run() { 62 // Prime the lexer. 63 Lex.Lex(); 64 65 return ParseTopLevelEntities() || 66 ValidateEndOfModule(); 67} 68 69/// ValidateEndOfModule - Do final validity and sanity checks at the end of the 70/// module. 71bool LLParser::ValidateEndOfModule() { 72 if (!ForwardRefTypes.empty()) 73 return Error(ForwardRefTypes.begin()->second.second, 74 "use of undefined type named '" + 75 ForwardRefTypes.begin()->first + "'"); 76 if (!ForwardRefTypeIDs.empty()) 77 return Error(ForwardRefTypeIDs.begin()->second.second, 78 "use of undefined type '%" + 79 utostr(ForwardRefTypeIDs.begin()->first) + "'"); 80 81 if (!ForwardRefVals.empty()) 82 return Error(ForwardRefVals.begin()->second.second, 83 "use of undefined value '@" + ForwardRefVals.begin()->first + 84 "'"); 85 86 if (!ForwardRefValIDs.empty()) 87 return Error(ForwardRefValIDs.begin()->second.second, 88 "use of undefined value '@" + 89 utostr(ForwardRefValIDs.begin()->first) + "'"); 90 91 if (!ForwardRefMDNodes.empty()) 92 return Error(ForwardRefMDNodes.begin()->second.second, 93 "use of undefined metadata '!" + 94 utostr(ForwardRefMDNodes.begin()->first) + "'"); 95 96 97 // Look for intrinsic functions and CallInst that need to be upgraded 98 for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ) 99 UpgradeCallsToIntrinsic(FI++); // must be post-increment, as we remove 100 101 return false; 102} 103 104//===----------------------------------------------------------------------===// 105// Top-Level Entities 106//===----------------------------------------------------------------------===// 107 108bool LLParser::ParseTopLevelEntities() { 109 while (1) { 110 switch (Lex.getKind()) { 111 default: return TokError("expected top-level entity"); 112 case lltok::Eof: return false; 113 //case lltok::kw_define: 114 case lltok::kw_declare: if (ParseDeclare()) return true; break; 115 case lltok::kw_define: if (ParseDefine()) return true; break; 116 case lltok::kw_module: if (ParseModuleAsm()) return true; break; 117 case lltok::kw_target: if (ParseTargetDefinition()) return true; break; 118 case lltok::kw_deplibs: if (ParseDepLibs()) return true; break; 119 case lltok::kw_type: if (ParseUnnamedType()) return true; break; 120 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0 121 case lltok::LocalVar: if (ParseNamedType()) return true; break; 122 case lltok::GlobalVar: if (ParseNamedGlobal()) return true; break; 123 case lltok::Metadata: if (ParseStandaloneMetadata()) return true; break; 124 125 // The Global variable production with no name can have many different 126 // optional leading prefixes, the production is: 127 // GlobalVar ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 128 // OptionalAddrSpace ('constant'|'global') ... 129 case lltok::kw_private : // OptionalLinkage 130 case lltok::kw_linker_private: // OptionalLinkage 131 case lltok::kw_internal: // OptionalLinkage 132 case lltok::kw_weak: // OptionalLinkage 133 case lltok::kw_weak_odr: // OptionalLinkage 134 case lltok::kw_linkonce: // OptionalLinkage 135 case lltok::kw_linkonce_odr: // OptionalLinkage 136 case lltok::kw_appending: // OptionalLinkage 137 case lltok::kw_dllexport: // OptionalLinkage 138 case lltok::kw_common: // OptionalLinkage 139 case lltok::kw_dllimport: // OptionalLinkage 140 case lltok::kw_extern_weak: // OptionalLinkage 141 case lltok::kw_external: { // OptionalLinkage 142 unsigned Linkage, Visibility; 143 if (ParseOptionalLinkage(Linkage) || 144 ParseOptionalVisibility(Visibility) || 145 ParseGlobal("", SMLoc(), Linkage, true, Visibility)) 146 return true; 147 break; 148 } 149 case lltok::kw_default: // OptionalVisibility 150 case lltok::kw_hidden: // OptionalVisibility 151 case lltok::kw_protected: { // OptionalVisibility 152 unsigned Visibility; 153 if (ParseOptionalVisibility(Visibility) || 154 ParseGlobal("", SMLoc(), 0, false, Visibility)) 155 return true; 156 break; 157 } 158 159 case lltok::kw_thread_local: // OptionalThreadLocal 160 case lltok::kw_addrspace: // OptionalAddrSpace 161 case lltok::kw_constant: // GlobalType 162 case lltok::kw_global: // GlobalType 163 if (ParseGlobal("", SMLoc(), 0, false, 0)) return true; 164 break; 165 } 166 } 167} 168 169 170/// toplevelentity 171/// ::= 'module' 'asm' STRINGCONSTANT 172bool LLParser::ParseModuleAsm() { 173 assert(Lex.getKind() == lltok::kw_module); 174 Lex.Lex(); 175 176 std::string AsmStr; 177 if (ParseToken(lltok::kw_asm, "expected 'module asm'") || 178 ParseStringConstant(AsmStr)) return true; 179 180 const std::string &AsmSoFar = M->getModuleInlineAsm(); 181 if (AsmSoFar.empty()) 182 M->setModuleInlineAsm(AsmStr); 183 else 184 M->setModuleInlineAsm(AsmSoFar+"\n"+AsmStr); 185 return false; 186} 187 188/// toplevelentity 189/// ::= 'target' 'triple' '=' STRINGCONSTANT 190/// ::= 'target' 'datalayout' '=' STRINGCONSTANT 191bool LLParser::ParseTargetDefinition() { 192 assert(Lex.getKind() == lltok::kw_target); 193 std::string Str; 194 switch (Lex.Lex()) { 195 default: return TokError("unknown target property"); 196 case lltok::kw_triple: 197 Lex.Lex(); 198 if (ParseToken(lltok::equal, "expected '=' after target triple") || 199 ParseStringConstant(Str)) 200 return true; 201 M->setTargetTriple(Str); 202 return false; 203 case lltok::kw_datalayout: 204 Lex.Lex(); 205 if (ParseToken(lltok::equal, "expected '=' after target datalayout") || 206 ParseStringConstant(Str)) 207 return true; 208 M->setDataLayout(Str); 209 return false; 210 } 211} 212 213/// toplevelentity 214/// ::= 'deplibs' '=' '[' ']' 215/// ::= 'deplibs' '=' '[' STRINGCONSTANT (',' STRINGCONSTANT)* ']' 216bool LLParser::ParseDepLibs() { 217 assert(Lex.getKind() == lltok::kw_deplibs); 218 Lex.Lex(); 219 if (ParseToken(lltok::equal, "expected '=' after deplibs") || 220 ParseToken(lltok::lsquare, "expected '=' after deplibs")) 221 return true; 222 223 if (EatIfPresent(lltok::rsquare)) 224 return false; 225 226 std::string Str; 227 if (ParseStringConstant(Str)) return true; 228 M->addLibrary(Str); 229 230 while (EatIfPresent(lltok::comma)) { 231 if (ParseStringConstant(Str)) return true; 232 M->addLibrary(Str); 233 } 234 235 return ParseToken(lltok::rsquare, "expected ']' at end of list"); 236} 237 238/// toplevelentity 239/// ::= 'type' type 240bool LLParser::ParseUnnamedType() { 241 assert(Lex.getKind() == lltok::kw_type); 242 LocTy TypeLoc = Lex.getLoc(); 243 Lex.Lex(); // eat kw_type 244 245 PATypeHolder Ty(Type::VoidTy); 246 if (ParseType(Ty)) return true; 247 248 unsigned TypeID = NumberedTypes.size(); 249 250 // See if this type was previously referenced. 251 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 252 FI = ForwardRefTypeIDs.find(TypeID); 253 if (FI != ForwardRefTypeIDs.end()) { 254 if (FI->second.first.get() == Ty) 255 return Error(TypeLoc, "self referential type is invalid"); 256 257 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 258 Ty = FI->second.first.get(); 259 ForwardRefTypeIDs.erase(FI); 260 } 261 262 NumberedTypes.push_back(Ty); 263 264 return false; 265} 266 267/// toplevelentity 268/// ::= LocalVar '=' 'type' type 269bool LLParser::ParseNamedType() { 270 std::string Name = Lex.getStrVal(); 271 LocTy NameLoc = Lex.getLoc(); 272 Lex.Lex(); // eat LocalVar. 273 274 PATypeHolder Ty(Type::VoidTy); 275 276 if (ParseToken(lltok::equal, "expected '=' after name") || 277 ParseToken(lltok::kw_type, "expected 'type' after name") || 278 ParseType(Ty)) 279 return true; 280 281 // Set the type name, checking for conflicts as we do so. 282 bool AlreadyExists = M->addTypeName(Name, Ty); 283 if (!AlreadyExists) return false; 284 285 // See if this type is a forward reference. We need to eagerly resolve 286 // types to allow recursive type redefinitions below. 287 std::map<std::string, std::pair<PATypeHolder, LocTy> >::iterator 288 FI = ForwardRefTypes.find(Name); 289 if (FI != ForwardRefTypes.end()) { 290 if (FI->second.first.get() == Ty) 291 return Error(NameLoc, "self referential type is invalid"); 292 293 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 294 Ty = FI->second.first.get(); 295 ForwardRefTypes.erase(FI); 296 } 297 298 // Inserting a name that is already defined, get the existing name. 299 const Type *Existing = M->getTypeByName(Name); 300 assert(Existing && "Conflict but no matching type?!"); 301 302 // Otherwise, this is an attempt to redefine a type. That's okay if 303 // the redefinition is identical to the original. 304 // FIXME: REMOVE REDEFINITIONS IN LLVM 3.0 305 if (Existing == Ty) return false; 306 307 // Any other kind of (non-equivalent) redefinition is an error. 308 return Error(NameLoc, "redefinition of type named '" + Name + "' of type '" + 309 Ty->getDescription() + "'"); 310} 311 312 313/// toplevelentity 314/// ::= 'declare' FunctionHeader 315bool LLParser::ParseDeclare() { 316 assert(Lex.getKind() == lltok::kw_declare); 317 Lex.Lex(); 318 319 Function *F; 320 return ParseFunctionHeader(F, false); 321} 322 323/// toplevelentity 324/// ::= 'define' FunctionHeader '{' ... 325bool LLParser::ParseDefine() { 326 assert(Lex.getKind() == lltok::kw_define); 327 Lex.Lex(); 328 329 Function *F; 330 return ParseFunctionHeader(F, true) || 331 ParseFunctionBody(*F); 332} 333 334/// ParseGlobalType 335/// ::= 'constant' 336/// ::= 'global' 337bool LLParser::ParseGlobalType(bool &IsConstant) { 338 if (Lex.getKind() == lltok::kw_constant) 339 IsConstant = true; 340 else if (Lex.getKind() == lltok::kw_global) 341 IsConstant = false; 342 else { 343 IsConstant = false; 344 return TokError("expected 'global' or 'constant'"); 345 } 346 Lex.Lex(); 347 return false; 348} 349 350/// ParseNamedGlobal: 351/// GlobalVar '=' OptionalVisibility ALIAS ... 352/// GlobalVar '=' OptionalLinkage OptionalVisibility ... -> global variable 353bool LLParser::ParseNamedGlobal() { 354 assert(Lex.getKind() == lltok::GlobalVar); 355 LocTy NameLoc = Lex.getLoc(); 356 std::string Name = Lex.getStrVal(); 357 Lex.Lex(); 358 359 bool HasLinkage; 360 unsigned Linkage, Visibility; 361 if (ParseToken(lltok::equal, "expected '=' in global variable") || 362 ParseOptionalLinkage(Linkage, HasLinkage) || 363 ParseOptionalVisibility(Visibility)) 364 return true; 365 366 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 367 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 368 return ParseAlias(Name, NameLoc, Visibility); 369} 370 371// MDString: 372// ::= '!' STRINGCONSTANT 373bool LLParser::ParseMDString(MetadataBase *&MDS) { 374 std::string Str; 375 if (ParseStringConstant(Str)) return true; 376 MDS = Context.getMDString(Str); 377 return false; 378} 379 380// MDNode: 381// ::= '!' MDNodeNumber 382bool LLParser::ParseMDNode(MetadataBase *&Node) { 383 // !{ ..., !42, ... } 384 unsigned MID = 0; 385 if (ParseUInt32(MID)) return true; 386 387 // Check existing MDNode. 388 std::map<unsigned, MetadataBase *>::iterator I = MetadataCache.find(MID); 389 if (I != MetadataCache.end()) { 390 Node = I->second; 391 return false; 392 } 393 394 // Check known forward references. 395 std::map<unsigned, std::pair<MetadataBase *, LocTy> >::iterator 396 FI = ForwardRefMDNodes.find(MID); 397 if (FI != ForwardRefMDNodes.end()) { 398 Node = FI->second.first; 399 return false; 400 } 401 402 // Create MDNode forward reference 403 SmallVector<Value *, 1> Elts; 404 std::string FwdRefName = "llvm.mdnode.fwdref." + utostr(MID); 405 Elts.push_back(Context.getMDString(FwdRefName)); 406 MDNode *FwdNode = Context.getMDNode(Elts.data(), Elts.size()); 407 ForwardRefMDNodes[MID] = std::make_pair(FwdNode, Lex.getLoc()); 408 Node = FwdNode; 409 return false; 410} 411 412/// ParseStandaloneMetadata: 413/// !42 = !{...} 414bool LLParser::ParseStandaloneMetadata() { 415 assert(Lex.getKind() == lltok::Metadata); 416 Lex.Lex(); 417 unsigned MetadataID = 0; 418 if (ParseUInt32(MetadataID)) 419 return true; 420 if (MetadataCache.find(MetadataID) != MetadataCache.end()) 421 return TokError("Metadata id is already used"); 422 if (ParseToken(lltok::equal, "expected '=' here")) 423 return true; 424 425 LocTy TyLoc; 426 PATypeHolder Ty(Type::VoidTy); 427 if (ParseType(Ty, TyLoc)) 428 return true; 429 430 if (Lex.getKind() != lltok::Metadata) 431 return TokError("Expected metadata here"); 432 433 Lex.Lex(); 434 if (Lex.getKind() != lltok::lbrace) 435 return TokError("Expected '{' here"); 436 437 SmallVector<Value *, 16> Elts; 438 if (ParseMDNodeVector(Elts) 439 || ParseToken(lltok::rbrace, "expected end of metadata node")) 440 return true; 441 442 MDNode *Init = Context.getMDNode(Elts.data(), Elts.size()); 443 MetadataCache[MetadataID] = Init; 444 std::map<unsigned, std::pair<MetadataBase *, LocTy> >::iterator 445 FI = ForwardRefMDNodes.find(MetadataID); 446 if (FI != ForwardRefMDNodes.end()) { 447 MDNode *FwdNode = cast<MDNode>(FI->second.first); 448 FwdNode->replaceAllUsesWith(Init); 449 ForwardRefMDNodes.erase(FI); 450 } 451 452 return false; 453} 454 455/// ParseAlias: 456/// ::= GlobalVar '=' OptionalVisibility 'alias' OptionalLinkage Aliasee 457/// Aliasee 458/// ::= TypeAndValue 459/// ::= 'bitcast' '(' TypeAndValue 'to' Type ')' 460/// ::= 'getelementptr' 'inbounds'? '(' ... ')' 461/// 462/// Everything through visibility has already been parsed. 463/// 464bool LLParser::ParseAlias(const std::string &Name, LocTy NameLoc, 465 unsigned Visibility) { 466 assert(Lex.getKind() == lltok::kw_alias); 467 Lex.Lex(); 468 unsigned Linkage; 469 LocTy LinkageLoc = Lex.getLoc(); 470 if (ParseOptionalLinkage(Linkage)) 471 return true; 472 473 if (Linkage != GlobalValue::ExternalLinkage && 474 Linkage != GlobalValue::WeakAnyLinkage && 475 Linkage != GlobalValue::WeakODRLinkage && 476 Linkage != GlobalValue::InternalLinkage && 477 Linkage != GlobalValue::PrivateLinkage && 478 Linkage != GlobalValue::LinkerPrivateLinkage) 479 return Error(LinkageLoc, "invalid linkage type for alias"); 480 481 Constant *Aliasee; 482 LocTy AliaseeLoc = Lex.getLoc(); 483 if (Lex.getKind() != lltok::kw_bitcast && 484 Lex.getKind() != lltok::kw_getelementptr) { 485 if (ParseGlobalTypeAndValue(Aliasee)) return true; 486 } else { 487 // The bitcast dest type is not present, it is implied by the dest type. 488 ValID ID; 489 if (ParseValID(ID)) return true; 490 if (ID.Kind != ValID::t_Constant) 491 return Error(AliaseeLoc, "invalid aliasee"); 492 Aliasee = ID.ConstantVal; 493 } 494 495 if (!isa<PointerType>(Aliasee->getType())) 496 return Error(AliaseeLoc, "alias must have pointer type"); 497 498 // Okay, create the alias but do not insert it into the module yet. 499 GlobalAlias* GA = new GlobalAlias(Aliasee->getType(), 500 (GlobalValue::LinkageTypes)Linkage, Name, 501 Aliasee); 502 GA->setVisibility((GlobalValue::VisibilityTypes)Visibility); 503 504 // See if this value already exists in the symbol table. If so, it is either 505 // a redefinition or a definition of a forward reference. 506 if (GlobalValue *Val = 507 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name))) { 508 // See if this was a redefinition. If so, there is no entry in 509 // ForwardRefVals. 510 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 511 I = ForwardRefVals.find(Name); 512 if (I == ForwardRefVals.end()) 513 return Error(NameLoc, "redefinition of global named '@" + Name + "'"); 514 515 // Otherwise, this was a definition of forward ref. Verify that types 516 // agree. 517 if (Val->getType() != GA->getType()) 518 return Error(NameLoc, 519 "forward reference and definition of alias have different types"); 520 521 // If they agree, just RAUW the old value with the alias and remove the 522 // forward ref info. 523 Val->replaceAllUsesWith(GA); 524 Val->eraseFromParent(); 525 ForwardRefVals.erase(I); 526 } 527 528 // Insert into the module, we know its name won't collide now. 529 M->getAliasList().push_back(GA); 530 assert(GA->getNameStr() == Name && "Should not be a name conflict!"); 531 532 return false; 533} 534 535/// ParseGlobal 536/// ::= GlobalVar '=' OptionalLinkage OptionalVisibility OptionalThreadLocal 537/// OptionalAddrSpace GlobalType Type Const 538/// ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 539/// OptionalAddrSpace GlobalType Type Const 540/// 541/// Everything through visibility has been parsed already. 542/// 543bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc, 544 unsigned Linkage, bool HasLinkage, 545 unsigned Visibility) { 546 unsigned AddrSpace; 547 bool ThreadLocal, IsConstant; 548 LocTy TyLoc; 549 550 PATypeHolder Ty(Type::VoidTy); 551 if (ParseOptionalToken(lltok::kw_thread_local, ThreadLocal) || 552 ParseOptionalAddrSpace(AddrSpace) || 553 ParseGlobalType(IsConstant) || 554 ParseType(Ty, TyLoc)) 555 return true; 556 557 // If the linkage is specified and is external, then no initializer is 558 // present. 559 Constant *Init = 0; 560 if (!HasLinkage || (Linkage != GlobalValue::DLLImportLinkage && 561 Linkage != GlobalValue::ExternalWeakLinkage && 562 Linkage != GlobalValue::ExternalLinkage)) { 563 if (ParseGlobalValue(Ty, Init)) 564 return true; 565 } 566 567 if (isa<FunctionType>(Ty) || Ty == Type::LabelTy) 568 return Error(TyLoc, "invalid type for global variable"); 569 570 GlobalVariable *GV = 0; 571 572 // See if the global was forward referenced, if so, use the global. 573 if (!Name.empty()) { 574 if ((GV = M->getGlobalVariable(Name, true)) && 575 !ForwardRefVals.erase(Name)) 576 return Error(NameLoc, "redefinition of global '@" + Name + "'"); 577 } else { 578 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 579 I = ForwardRefValIDs.find(NumberedVals.size()); 580 if (I != ForwardRefValIDs.end()) { 581 GV = cast<GlobalVariable>(I->second.first); 582 ForwardRefValIDs.erase(I); 583 } 584 } 585 586 if (GV == 0) { 587 GV = new GlobalVariable(*M, Ty, false, GlobalValue::ExternalLinkage, 0, 588 Name, 0, false, AddrSpace); 589 } else { 590 if (GV->getType()->getElementType() != Ty) 591 return Error(TyLoc, 592 "forward reference and definition of global have different types"); 593 594 // Move the forward-reference to the correct spot in the module. 595 M->getGlobalList().splice(M->global_end(), M->getGlobalList(), GV); 596 } 597 598 if (Name.empty()) 599 NumberedVals.push_back(GV); 600 601 // Set the parsed properties on the global. 602 if (Init) 603 GV->setInitializer(Init); 604 GV->setConstant(IsConstant); 605 GV->setLinkage((GlobalValue::LinkageTypes)Linkage); 606 GV->setVisibility((GlobalValue::VisibilityTypes)Visibility); 607 GV->setThreadLocal(ThreadLocal); 608 609 // Parse attributes on the global. 610 while (Lex.getKind() == lltok::comma) { 611 Lex.Lex(); 612 613 if (Lex.getKind() == lltok::kw_section) { 614 Lex.Lex(); 615 GV->setSection(Lex.getStrVal()); 616 if (ParseToken(lltok::StringConstant, "expected global section string")) 617 return true; 618 } else if (Lex.getKind() == lltok::kw_align) { 619 unsigned Alignment; 620 if (ParseOptionalAlignment(Alignment)) return true; 621 GV->setAlignment(Alignment); 622 } else { 623 TokError("unknown global variable property!"); 624 } 625 } 626 627 return false; 628} 629 630 631//===----------------------------------------------------------------------===// 632// GlobalValue Reference/Resolution Routines. 633//===----------------------------------------------------------------------===// 634 635/// GetGlobalVal - Get a value with the specified name or ID, creating a 636/// forward reference record if needed. This can return null if the value 637/// exists but does not have the right type. 638GlobalValue *LLParser::GetGlobalVal(const std::string &Name, const Type *Ty, 639 LocTy Loc) { 640 const PointerType *PTy = dyn_cast<PointerType>(Ty); 641 if (PTy == 0) { 642 Error(Loc, "global variable reference must have pointer type"); 643 return 0; 644 } 645 646 // Look this name up in the normal function symbol table. 647 GlobalValue *Val = 648 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name)); 649 650 // If this is a forward reference for the value, see if we already created a 651 // forward ref record. 652 if (Val == 0) { 653 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 654 I = ForwardRefVals.find(Name); 655 if (I != ForwardRefVals.end()) 656 Val = I->second.first; 657 } 658 659 // If we have the value in the symbol table or fwd-ref table, return it. 660 if (Val) { 661 if (Val->getType() == Ty) return Val; 662 Error(Loc, "'@" + Name + "' defined with type '" + 663 Val->getType()->getDescription() + "'"); 664 return 0; 665 } 666 667 // Otherwise, create a new forward reference for this value and remember it. 668 GlobalValue *FwdVal; 669 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 670 // Function types can return opaque but functions can't. 671 if (isa<OpaqueType>(FT->getReturnType())) { 672 Error(Loc, "function may not return opaque type"); 673 return 0; 674 } 675 676 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M); 677 } else { 678 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 679 GlobalValue::ExternalWeakLinkage, 0, Name); 680 } 681 682 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 683 return FwdVal; 684} 685 686GlobalValue *LLParser::GetGlobalVal(unsigned ID, const Type *Ty, LocTy Loc) { 687 const PointerType *PTy = dyn_cast<PointerType>(Ty); 688 if (PTy == 0) { 689 Error(Loc, "global variable reference must have pointer type"); 690 return 0; 691 } 692 693 GlobalValue *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 694 695 // If this is a forward reference for the value, see if we already created a 696 // forward ref record. 697 if (Val == 0) { 698 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 699 I = ForwardRefValIDs.find(ID); 700 if (I != ForwardRefValIDs.end()) 701 Val = I->second.first; 702 } 703 704 // If we have the value in the symbol table or fwd-ref table, return it. 705 if (Val) { 706 if (Val->getType() == Ty) return Val; 707 Error(Loc, "'@" + utostr(ID) + "' defined with type '" + 708 Val->getType()->getDescription() + "'"); 709 return 0; 710 } 711 712 // Otherwise, create a new forward reference for this value and remember it. 713 GlobalValue *FwdVal; 714 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 715 // Function types can return opaque but functions can't. 716 if (isa<OpaqueType>(FT->getReturnType())) { 717 Error(Loc, "function may not return opaque type"); 718 return 0; 719 } 720 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, "", M); 721 } else { 722 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 723 GlobalValue::ExternalWeakLinkage, 0, ""); 724 } 725 726 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 727 return FwdVal; 728} 729 730 731//===----------------------------------------------------------------------===// 732// Helper Routines. 733//===----------------------------------------------------------------------===// 734 735/// ParseToken - If the current token has the specified kind, eat it and return 736/// success. Otherwise, emit the specified error and return failure. 737bool LLParser::ParseToken(lltok::Kind T, const char *ErrMsg) { 738 if (Lex.getKind() != T) 739 return TokError(ErrMsg); 740 Lex.Lex(); 741 return false; 742} 743 744/// ParseStringConstant 745/// ::= StringConstant 746bool LLParser::ParseStringConstant(std::string &Result) { 747 if (Lex.getKind() != lltok::StringConstant) 748 return TokError("expected string constant"); 749 Result = Lex.getStrVal(); 750 Lex.Lex(); 751 return false; 752} 753 754/// ParseUInt32 755/// ::= uint32 756bool LLParser::ParseUInt32(unsigned &Val) { 757 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned()) 758 return TokError("expected integer"); 759 uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(0xFFFFFFFFULL+1); 760 if (Val64 != unsigned(Val64)) 761 return TokError("expected 32-bit integer (too large)"); 762 Val = Val64; 763 Lex.Lex(); 764 return false; 765} 766 767 768/// ParseOptionalAddrSpace 769/// := /*empty*/ 770/// := 'addrspace' '(' uint32 ')' 771bool LLParser::ParseOptionalAddrSpace(unsigned &AddrSpace) { 772 AddrSpace = 0; 773 if (!EatIfPresent(lltok::kw_addrspace)) 774 return false; 775 return ParseToken(lltok::lparen, "expected '(' in address space") || 776 ParseUInt32(AddrSpace) || 777 ParseToken(lltok::rparen, "expected ')' in address space"); 778} 779 780/// ParseOptionalAttrs - Parse a potentially empty attribute list. AttrKind 781/// indicates what kind of attribute list this is: 0: function arg, 1: result, 782/// 2: function attr. 783/// 3: function arg after value: FIXME: REMOVE IN LLVM 3.0 784bool LLParser::ParseOptionalAttrs(unsigned &Attrs, unsigned AttrKind) { 785 Attrs = Attribute::None; 786 LocTy AttrLoc = Lex.getLoc(); 787 788 while (1) { 789 switch (Lex.getKind()) { 790 case lltok::kw_sext: 791 case lltok::kw_zext: 792 // Treat these as signext/zeroext if they occur in the argument list after 793 // the value, as in "call i8 @foo(i8 10 sext)". If they occur before the 794 // value, as in "call i8 @foo(i8 sext (" then it is part of a constant 795 // expr. 796 // FIXME: REMOVE THIS IN LLVM 3.0 797 if (AttrKind == 3) { 798 if (Lex.getKind() == lltok::kw_sext) 799 Attrs |= Attribute::SExt; 800 else 801 Attrs |= Attribute::ZExt; 802 break; 803 } 804 // FALL THROUGH. 805 default: // End of attributes. 806 if (AttrKind != 2 && (Attrs & Attribute::FunctionOnly)) 807 return Error(AttrLoc, "invalid use of function-only attribute"); 808 809 if (AttrKind != 0 && AttrKind != 3 && (Attrs & Attribute::ParameterOnly)) 810 return Error(AttrLoc, "invalid use of parameter-only attribute"); 811 812 return false; 813 case lltok::kw_zeroext: Attrs |= Attribute::ZExt; break; 814 case lltok::kw_signext: Attrs |= Attribute::SExt; break; 815 case lltok::kw_inreg: Attrs |= Attribute::InReg; break; 816 case lltok::kw_sret: Attrs |= Attribute::StructRet; break; 817 case lltok::kw_noalias: Attrs |= Attribute::NoAlias; break; 818 case lltok::kw_nocapture: Attrs |= Attribute::NoCapture; break; 819 case lltok::kw_byval: Attrs |= Attribute::ByVal; break; 820 case lltok::kw_nest: Attrs |= Attribute::Nest; break; 821 822 case lltok::kw_noreturn: Attrs |= Attribute::NoReturn; break; 823 case lltok::kw_nounwind: Attrs |= Attribute::NoUnwind; break; 824 case lltok::kw_noinline: Attrs |= Attribute::NoInline; break; 825 case lltok::kw_readnone: Attrs |= Attribute::ReadNone; break; 826 case lltok::kw_readonly: Attrs |= Attribute::ReadOnly; break; 827 case lltok::kw_alwaysinline: Attrs |= Attribute::AlwaysInline; break; 828 case lltok::kw_optsize: Attrs |= Attribute::OptimizeForSize; break; 829 case lltok::kw_ssp: Attrs |= Attribute::StackProtect; break; 830 case lltok::kw_sspreq: Attrs |= Attribute::StackProtectReq; break; 831 case lltok::kw_noredzone: Attrs |= Attribute::NoRedZone; break; 832 case lltok::kw_noimplicitfloat: Attrs |= Attribute::NoImplicitFloat; break; 833 case lltok::kw_naked: Attrs |= Attribute::Naked; break; 834 835 case lltok::kw_align: { 836 unsigned Alignment; 837 if (ParseOptionalAlignment(Alignment)) 838 return true; 839 Attrs |= Attribute::constructAlignmentFromInt(Alignment); 840 continue; 841 } 842 } 843 Lex.Lex(); 844 } 845} 846 847/// ParseOptionalLinkage 848/// ::= /*empty*/ 849/// ::= 'private' 850/// ::= 'linker_private' 851/// ::= 'internal' 852/// ::= 'weak' 853/// ::= 'weak_odr' 854/// ::= 'linkonce' 855/// ::= 'linkonce_odr' 856/// ::= 'appending' 857/// ::= 'dllexport' 858/// ::= 'common' 859/// ::= 'dllimport' 860/// ::= 'extern_weak' 861/// ::= 'external' 862bool LLParser::ParseOptionalLinkage(unsigned &Res, bool &HasLinkage) { 863 HasLinkage = false; 864 switch (Lex.getKind()) { 865 default: Res=GlobalValue::ExternalLinkage; return false; 866 case lltok::kw_private: Res = GlobalValue::PrivateLinkage; break; 867 case lltok::kw_linker_private: Res = GlobalValue::LinkerPrivateLinkage; break; 868 case lltok::kw_internal: Res = GlobalValue::InternalLinkage; break; 869 case lltok::kw_weak: Res = GlobalValue::WeakAnyLinkage; break; 870 case lltok::kw_weak_odr: Res = GlobalValue::WeakODRLinkage; break; 871 case lltok::kw_linkonce: Res = GlobalValue::LinkOnceAnyLinkage; break; 872 case lltok::kw_linkonce_odr: Res = GlobalValue::LinkOnceODRLinkage; break; 873 case lltok::kw_available_externally: 874 Res = GlobalValue::AvailableExternallyLinkage; 875 break; 876 case lltok::kw_appending: Res = GlobalValue::AppendingLinkage; break; 877 case lltok::kw_dllexport: Res = GlobalValue::DLLExportLinkage; break; 878 case lltok::kw_common: Res = GlobalValue::CommonLinkage; break; 879 case lltok::kw_dllimport: Res = GlobalValue::DLLImportLinkage; break; 880 case lltok::kw_extern_weak: Res = GlobalValue::ExternalWeakLinkage; break; 881 case lltok::kw_external: Res = GlobalValue::ExternalLinkage; break; 882 } 883 Lex.Lex(); 884 HasLinkage = true; 885 return false; 886} 887 888/// ParseOptionalVisibility 889/// ::= /*empty*/ 890/// ::= 'default' 891/// ::= 'hidden' 892/// ::= 'protected' 893/// 894bool LLParser::ParseOptionalVisibility(unsigned &Res) { 895 switch (Lex.getKind()) { 896 default: Res = GlobalValue::DefaultVisibility; return false; 897 case lltok::kw_default: Res = GlobalValue::DefaultVisibility; break; 898 case lltok::kw_hidden: Res = GlobalValue::HiddenVisibility; break; 899 case lltok::kw_protected: Res = GlobalValue::ProtectedVisibility; break; 900 } 901 Lex.Lex(); 902 return false; 903} 904 905/// ParseOptionalCallingConv 906/// ::= /*empty*/ 907/// ::= 'ccc' 908/// ::= 'fastcc' 909/// ::= 'coldcc' 910/// ::= 'x86_stdcallcc' 911/// ::= 'x86_fastcallcc' 912/// ::= 'arm_apcscc' 913/// ::= 'arm_aapcscc' 914/// ::= 'arm_aapcs_vfpcc' 915/// ::= 'cc' UINT 916/// 917bool LLParser::ParseOptionalCallingConv(unsigned &CC) { 918 switch (Lex.getKind()) { 919 default: CC = CallingConv::C; return false; 920 case lltok::kw_ccc: CC = CallingConv::C; break; 921 case lltok::kw_fastcc: CC = CallingConv::Fast; break; 922 case lltok::kw_coldcc: CC = CallingConv::Cold; break; 923 case lltok::kw_x86_stdcallcc: CC = CallingConv::X86_StdCall; break; 924 case lltok::kw_x86_fastcallcc: CC = CallingConv::X86_FastCall; break; 925 case lltok::kw_arm_apcscc: CC = CallingConv::ARM_APCS; break; 926 case lltok::kw_arm_aapcscc: CC = CallingConv::ARM_AAPCS; break; 927 case lltok::kw_arm_aapcs_vfpcc:CC = CallingConv::ARM_AAPCS_VFP; break; 928 case lltok::kw_cc: Lex.Lex(); return ParseUInt32(CC); 929 } 930 Lex.Lex(); 931 return false; 932} 933 934/// ParseOptionalAlignment 935/// ::= /* empty */ 936/// ::= 'align' 4 937bool LLParser::ParseOptionalAlignment(unsigned &Alignment) { 938 Alignment = 0; 939 if (!EatIfPresent(lltok::kw_align)) 940 return false; 941 LocTy AlignLoc = Lex.getLoc(); 942 if (ParseUInt32(Alignment)) return true; 943 if (!isPowerOf2_32(Alignment)) 944 return Error(AlignLoc, "alignment is not a power of two"); 945 return false; 946} 947 948/// ParseOptionalCommaAlignment 949/// ::= /* empty */ 950/// ::= ',' 'align' 4 951bool LLParser::ParseOptionalCommaAlignment(unsigned &Alignment) { 952 Alignment = 0; 953 if (!EatIfPresent(lltok::comma)) 954 return false; 955 return ParseToken(lltok::kw_align, "expected 'align'") || 956 ParseUInt32(Alignment); 957} 958 959/// ParseIndexList 960/// ::= (',' uint32)+ 961bool LLParser::ParseIndexList(SmallVectorImpl<unsigned> &Indices) { 962 if (Lex.getKind() != lltok::comma) 963 return TokError("expected ',' as start of index list"); 964 965 while (EatIfPresent(lltok::comma)) { 966 unsigned Idx; 967 if (ParseUInt32(Idx)) return true; 968 Indices.push_back(Idx); 969 } 970 971 return false; 972} 973 974//===----------------------------------------------------------------------===// 975// Type Parsing. 976//===----------------------------------------------------------------------===// 977 978/// ParseType - Parse and resolve a full type. 979bool LLParser::ParseType(PATypeHolder &Result, bool AllowVoid) { 980 LocTy TypeLoc = Lex.getLoc(); 981 if (ParseTypeRec(Result)) return true; 982 983 // Verify no unresolved uprefs. 984 if (!UpRefs.empty()) 985 return Error(UpRefs.back().Loc, "invalid unresolved type up reference"); 986 987 if (!AllowVoid && Result.get() == Type::VoidTy) 988 return Error(TypeLoc, "void type only allowed for function results"); 989 990 return false; 991} 992 993/// HandleUpRefs - Every time we finish a new layer of types, this function is 994/// called. It loops through the UpRefs vector, which is a list of the 995/// currently active types. For each type, if the up-reference is contained in 996/// the newly completed type, we decrement the level count. When the level 997/// count reaches zero, the up-referenced type is the type that is passed in: 998/// thus we can complete the cycle. 999/// 1000PATypeHolder LLParser::HandleUpRefs(const Type *ty) { 1001 // If Ty isn't abstract, or if there are no up-references in it, then there is 1002 // nothing to resolve here. 1003 if (!ty->isAbstract() || UpRefs.empty()) return ty; 1004 1005 PATypeHolder Ty(ty); 1006#if 0 1007 errs() << "Type '" << Ty->getDescription() 1008 << "' newly formed. Resolving upreferences.\n" 1009 << UpRefs.size() << " upreferences active!\n"; 1010#endif 1011 1012 // If we find any resolvable upreferences (i.e., those whose NestingLevel goes 1013 // to zero), we resolve them all together before we resolve them to Ty. At 1014 // the end of the loop, if there is anything to resolve to Ty, it will be in 1015 // this variable. 1016 OpaqueType *TypeToResolve = 0; 1017 1018 for (unsigned i = 0; i != UpRefs.size(); ++i) { 1019 // Determine if 'Ty' directly contains this up-references 'LastContainedTy'. 1020 bool ContainsType = 1021 std::find(Ty->subtype_begin(), Ty->subtype_end(), 1022 UpRefs[i].LastContainedTy) != Ty->subtype_end(); 1023 1024#if 0 1025 errs() << " UR#" << i << " - TypeContains(" << Ty->getDescription() << ", " 1026 << UpRefs[i].LastContainedTy->getDescription() << ") = " 1027 << (ContainsType ? "true" : "false") 1028 << " level=" << UpRefs[i].NestingLevel << "\n"; 1029#endif 1030 if (!ContainsType) 1031 continue; 1032 1033 // Decrement level of upreference 1034 unsigned Level = --UpRefs[i].NestingLevel; 1035 UpRefs[i].LastContainedTy = Ty; 1036 1037 // If the Up-reference has a non-zero level, it shouldn't be resolved yet. 1038 if (Level != 0) 1039 continue; 1040 1041#if 0 1042 errs() << " * Resolving upreference for " << UpRefs[i].UpRefTy << "\n"; 1043#endif 1044 if (!TypeToResolve) 1045 TypeToResolve = UpRefs[i].UpRefTy; 1046 else 1047 UpRefs[i].UpRefTy->refineAbstractTypeTo(TypeToResolve); 1048 UpRefs.erase(UpRefs.begin()+i); // Remove from upreference list. 1049 --i; // Do not skip the next element. 1050 } 1051 1052 if (TypeToResolve) 1053 TypeToResolve->refineAbstractTypeTo(Ty); 1054 1055 return Ty; 1056} 1057 1058 1059/// ParseTypeRec - The recursive function used to process the internal 1060/// implementation details of types. 1061bool LLParser::ParseTypeRec(PATypeHolder &Result) { 1062 switch (Lex.getKind()) { 1063 default: 1064 return TokError("expected type"); 1065 case lltok::Type: 1066 // TypeRec ::= 'float' | 'void' (etc) 1067 Result = Lex.getTyVal(); 1068 Lex.Lex(); 1069 break; 1070 case lltok::kw_opaque: 1071 // TypeRec ::= 'opaque' 1072 Result = Context.getOpaqueType(); 1073 Lex.Lex(); 1074 break; 1075 case lltok::lbrace: 1076 // TypeRec ::= '{' ... '}' 1077 if (ParseStructType(Result, false)) 1078 return true; 1079 break; 1080 case lltok::lsquare: 1081 // TypeRec ::= '[' ... ']' 1082 Lex.Lex(); // eat the lsquare. 1083 if (ParseArrayVectorType(Result, false)) 1084 return true; 1085 break; 1086 case lltok::less: // Either vector or packed struct. 1087 // TypeRec ::= '<' ... '>' 1088 Lex.Lex(); 1089 if (Lex.getKind() == lltok::lbrace) { 1090 if (ParseStructType(Result, true) || 1091 ParseToken(lltok::greater, "expected '>' at end of packed struct")) 1092 return true; 1093 } else if (ParseArrayVectorType(Result, true)) 1094 return true; 1095 break; 1096 case lltok::LocalVar: 1097 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0 1098 // TypeRec ::= %foo 1099 if (const Type *T = M->getTypeByName(Lex.getStrVal())) { 1100 Result = T; 1101 } else { 1102 Result = Context.getOpaqueType(); 1103 ForwardRefTypes.insert(std::make_pair(Lex.getStrVal(), 1104 std::make_pair(Result, 1105 Lex.getLoc()))); 1106 M->addTypeName(Lex.getStrVal(), Result.get()); 1107 } 1108 Lex.Lex(); 1109 break; 1110 1111 case lltok::LocalVarID: 1112 // TypeRec ::= %4 1113 if (Lex.getUIntVal() < NumberedTypes.size()) 1114 Result = NumberedTypes[Lex.getUIntVal()]; 1115 else { 1116 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 1117 I = ForwardRefTypeIDs.find(Lex.getUIntVal()); 1118 if (I != ForwardRefTypeIDs.end()) 1119 Result = I->second.first; 1120 else { 1121 Result = Context.getOpaqueType(); 1122 ForwardRefTypeIDs.insert(std::make_pair(Lex.getUIntVal(), 1123 std::make_pair(Result, 1124 Lex.getLoc()))); 1125 } 1126 } 1127 Lex.Lex(); 1128 break; 1129 case lltok::backslash: { 1130 // TypeRec ::= '\' 4 1131 Lex.Lex(); 1132 unsigned Val; 1133 if (ParseUInt32(Val)) return true; 1134 OpaqueType *OT = Context.getOpaqueType(); //Use temporary placeholder. 1135 UpRefs.push_back(UpRefRecord(Lex.getLoc(), Val, OT)); 1136 Result = OT; 1137 break; 1138 } 1139 } 1140 1141 // Parse the type suffixes. 1142 while (1) { 1143 switch (Lex.getKind()) { 1144 // End of type. 1145 default: return false; 1146 1147 // TypeRec ::= TypeRec '*' 1148 case lltok::star: 1149 if (Result.get() == Type::LabelTy) 1150 return TokError("basic block pointers are invalid"); 1151 if (Result.get() == Type::VoidTy) 1152 return TokError("pointers to void are invalid; use i8* instead"); 1153 if (!PointerType::isValidElementType(Result.get())) 1154 return TokError("pointer to this type is invalid"); 1155 Result = HandleUpRefs(Context.getPointerTypeUnqual(Result.get())); 1156 Lex.Lex(); 1157 break; 1158 1159 // TypeRec ::= TypeRec 'addrspace' '(' uint32 ')' '*' 1160 case lltok::kw_addrspace: { 1161 if (Result.get() == Type::LabelTy) 1162 return TokError("basic block pointers are invalid"); 1163 if (Result.get() == Type::VoidTy) 1164 return TokError("pointers to void are invalid; use i8* instead"); 1165 if (!PointerType::isValidElementType(Result.get())) 1166 return TokError("pointer to this type is invalid"); 1167 unsigned AddrSpace; 1168 if (ParseOptionalAddrSpace(AddrSpace) || 1169 ParseToken(lltok::star, "expected '*' in address space")) 1170 return true; 1171 1172 Result = HandleUpRefs(Context.getPointerType(Result.get(), AddrSpace)); 1173 break; 1174 } 1175 1176 /// Types '(' ArgTypeListI ')' OptFuncAttrs 1177 case lltok::lparen: 1178 if (ParseFunctionType(Result)) 1179 return true; 1180 break; 1181 } 1182 } 1183} 1184 1185/// ParseParameterList 1186/// ::= '(' ')' 1187/// ::= '(' Arg (',' Arg)* ')' 1188/// Arg 1189/// ::= Type OptionalAttributes Value OptionalAttributes 1190bool LLParser::ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList, 1191 PerFunctionState &PFS) { 1192 if (ParseToken(lltok::lparen, "expected '(' in call")) 1193 return true; 1194 1195 while (Lex.getKind() != lltok::rparen) { 1196 // If this isn't the first argument, we need a comma. 1197 if (!ArgList.empty() && 1198 ParseToken(lltok::comma, "expected ',' in argument list")) 1199 return true; 1200 1201 // Parse the argument. 1202 LocTy ArgLoc; 1203 PATypeHolder ArgTy(Type::VoidTy); 1204 unsigned ArgAttrs1, ArgAttrs2; 1205 Value *V; 1206 if (ParseType(ArgTy, ArgLoc) || 1207 ParseOptionalAttrs(ArgAttrs1, 0) || 1208 ParseValue(ArgTy, V, PFS) || 1209 // FIXME: Should not allow attributes after the argument, remove this in 1210 // LLVM 3.0. 1211 ParseOptionalAttrs(ArgAttrs2, 3)) 1212 return true; 1213 ArgList.push_back(ParamInfo(ArgLoc, V, ArgAttrs1|ArgAttrs2)); 1214 } 1215 1216 Lex.Lex(); // Lex the ')'. 1217 return false; 1218} 1219 1220 1221 1222/// ParseArgumentList - Parse the argument list for a function type or function 1223/// prototype. If 'inType' is true then we are parsing a FunctionType. 1224/// ::= '(' ArgTypeListI ')' 1225/// ArgTypeListI 1226/// ::= /*empty*/ 1227/// ::= '...' 1228/// ::= ArgTypeList ',' '...' 1229/// ::= ArgType (',' ArgType)* 1230/// 1231bool LLParser::ParseArgumentList(std::vector<ArgInfo> &ArgList, 1232 bool &isVarArg, bool inType) { 1233 isVarArg = false; 1234 assert(Lex.getKind() == lltok::lparen); 1235 Lex.Lex(); // eat the (. 1236 1237 if (Lex.getKind() == lltok::rparen) { 1238 // empty 1239 } else if (Lex.getKind() == lltok::dotdotdot) { 1240 isVarArg = true; 1241 Lex.Lex(); 1242 } else { 1243 LocTy TypeLoc = Lex.getLoc(); 1244 PATypeHolder ArgTy(Type::VoidTy); 1245 unsigned Attrs; 1246 std::string Name; 1247 1248 // If we're parsing a type, use ParseTypeRec, because we allow recursive 1249 // types (such as a function returning a pointer to itself). If parsing a 1250 // function prototype, we require fully resolved types. 1251 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1252 ParseOptionalAttrs(Attrs, 0)) return true; 1253 1254 if (ArgTy == Type::VoidTy) 1255 return Error(TypeLoc, "argument can not have void type"); 1256 1257 if (Lex.getKind() == lltok::LocalVar || 1258 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1259 Name = Lex.getStrVal(); 1260 Lex.Lex(); 1261 } 1262 1263 if (!FunctionType::isValidArgumentType(ArgTy)) 1264 return Error(TypeLoc, "invalid type for function argument"); 1265 1266 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1267 1268 while (EatIfPresent(lltok::comma)) { 1269 // Handle ... at end of arg list. 1270 if (EatIfPresent(lltok::dotdotdot)) { 1271 isVarArg = true; 1272 break; 1273 } 1274 1275 // Otherwise must be an argument type. 1276 TypeLoc = Lex.getLoc(); 1277 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1278 ParseOptionalAttrs(Attrs, 0)) return true; 1279 1280 if (ArgTy == Type::VoidTy) 1281 return Error(TypeLoc, "argument can not have void type"); 1282 1283 if (Lex.getKind() == lltok::LocalVar || 1284 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1285 Name = Lex.getStrVal(); 1286 Lex.Lex(); 1287 } else { 1288 Name = ""; 1289 } 1290 1291 if (!ArgTy->isFirstClassType() && !isa<OpaqueType>(ArgTy)) 1292 return Error(TypeLoc, "invalid type for function argument"); 1293 1294 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1295 } 1296 } 1297 1298 return ParseToken(lltok::rparen, "expected ')' at end of argument list"); 1299} 1300 1301/// ParseFunctionType 1302/// ::= Type ArgumentList OptionalAttrs 1303bool LLParser::ParseFunctionType(PATypeHolder &Result) { 1304 assert(Lex.getKind() == lltok::lparen); 1305 1306 if (!FunctionType::isValidReturnType(Result)) 1307 return TokError("invalid function return type"); 1308 1309 std::vector<ArgInfo> ArgList; 1310 bool isVarArg; 1311 unsigned Attrs; 1312 if (ParseArgumentList(ArgList, isVarArg, true) || 1313 // FIXME: Allow, but ignore attributes on function types! 1314 // FIXME: Remove in LLVM 3.0 1315 ParseOptionalAttrs(Attrs, 2)) 1316 return true; 1317 1318 // Reject names on the arguments lists. 1319 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 1320 if (!ArgList[i].Name.empty()) 1321 return Error(ArgList[i].Loc, "argument name invalid in function type"); 1322 if (!ArgList[i].Attrs != 0) { 1323 // Allow but ignore attributes on function types; this permits 1324 // auto-upgrade. 1325 // FIXME: REJECT ATTRIBUTES ON FUNCTION TYPES in LLVM 3.0 1326 } 1327 } 1328 1329 std::vector<const Type*> ArgListTy; 1330 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 1331 ArgListTy.push_back(ArgList[i].Type); 1332 1333 Result = HandleUpRefs(Context.getFunctionType(Result.get(), 1334 ArgListTy, isVarArg)); 1335 return false; 1336} 1337 1338/// ParseStructType: Handles packed and unpacked types. </> parsed elsewhere. 1339/// TypeRec 1340/// ::= '{' '}' 1341/// ::= '{' TypeRec (',' TypeRec)* '}' 1342/// ::= '<' '{' '}' '>' 1343/// ::= '<' '{' TypeRec (',' TypeRec)* '}' '>' 1344bool LLParser::ParseStructType(PATypeHolder &Result, bool Packed) { 1345 assert(Lex.getKind() == lltok::lbrace); 1346 Lex.Lex(); // Consume the '{' 1347 1348 if (EatIfPresent(lltok::rbrace)) { 1349 Result = Context.getStructType(Packed); 1350 return false; 1351 } 1352 1353 std::vector<PATypeHolder> ParamsList; 1354 LocTy EltTyLoc = Lex.getLoc(); 1355 if (ParseTypeRec(Result)) return true; 1356 ParamsList.push_back(Result); 1357 1358 if (Result == Type::VoidTy) 1359 return Error(EltTyLoc, "struct element can not have void type"); 1360 if (!StructType::isValidElementType(Result)) 1361 return Error(EltTyLoc, "invalid element type for struct"); 1362 1363 while (EatIfPresent(lltok::comma)) { 1364 EltTyLoc = Lex.getLoc(); 1365 if (ParseTypeRec(Result)) return true; 1366 1367 if (Result == Type::VoidTy) 1368 return Error(EltTyLoc, "struct element can not have void type"); 1369 if (!StructType::isValidElementType(Result)) 1370 return Error(EltTyLoc, "invalid element type for struct"); 1371 1372 ParamsList.push_back(Result); 1373 } 1374 1375 if (ParseToken(lltok::rbrace, "expected '}' at end of struct")) 1376 return true; 1377 1378 std::vector<const Type*> ParamsListTy; 1379 for (unsigned i = 0, e = ParamsList.size(); i != e; ++i) 1380 ParamsListTy.push_back(ParamsList[i].get()); 1381 Result = HandleUpRefs(Context.getStructType(ParamsListTy, Packed)); 1382 return false; 1383} 1384 1385/// ParseArrayVectorType - Parse an array or vector type, assuming the first 1386/// token has already been consumed. 1387/// TypeRec 1388/// ::= '[' APSINTVAL 'x' Types ']' 1389/// ::= '<' APSINTVAL 'x' Types '>' 1390bool LLParser::ParseArrayVectorType(PATypeHolder &Result, bool isVector) { 1391 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned() || 1392 Lex.getAPSIntVal().getBitWidth() > 64) 1393 return TokError("expected number in address space"); 1394 1395 LocTy SizeLoc = Lex.getLoc(); 1396 uint64_t Size = Lex.getAPSIntVal().getZExtValue(); 1397 Lex.Lex(); 1398 1399 if (ParseToken(lltok::kw_x, "expected 'x' after element count")) 1400 return true; 1401 1402 LocTy TypeLoc = Lex.getLoc(); 1403 PATypeHolder EltTy(Type::VoidTy); 1404 if (ParseTypeRec(EltTy)) return true; 1405 1406 if (EltTy == Type::VoidTy) 1407 return Error(TypeLoc, "array and vector element type cannot be void"); 1408 1409 if (ParseToken(isVector ? lltok::greater : lltok::rsquare, 1410 "expected end of sequential type")) 1411 return true; 1412 1413 if (isVector) { 1414 if (Size == 0) 1415 return Error(SizeLoc, "zero element vector is illegal"); 1416 if ((unsigned)Size != Size) 1417 return Error(SizeLoc, "size too large for vector"); 1418 if (!VectorType::isValidElementType(EltTy)) 1419 return Error(TypeLoc, "vector element type must be fp or integer"); 1420 Result = Context.getVectorType(EltTy, unsigned(Size)); 1421 } else { 1422 if (!ArrayType::isValidElementType(EltTy)) 1423 return Error(TypeLoc, "invalid array element type"); 1424 Result = HandleUpRefs(Context.getArrayType(EltTy, Size)); 1425 } 1426 return false; 1427} 1428 1429//===----------------------------------------------------------------------===// 1430// Function Semantic Analysis. 1431//===----------------------------------------------------------------------===// 1432 1433LLParser::PerFunctionState::PerFunctionState(LLParser &p, Function &f) 1434 : P(p), F(f) { 1435 1436 // Insert unnamed arguments into the NumberedVals list. 1437 for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 1438 AI != E; ++AI) 1439 if (!AI->hasName()) 1440 NumberedVals.push_back(AI); 1441} 1442 1443LLParser::PerFunctionState::~PerFunctionState() { 1444 // If there were any forward referenced non-basicblock values, delete them. 1445 for (std::map<std::string, std::pair<Value*, LocTy> >::iterator 1446 I = ForwardRefVals.begin(), E = ForwardRefVals.end(); I != E; ++I) 1447 if (!isa<BasicBlock>(I->second.first)) { 1448 I->second.first->replaceAllUsesWith( 1449 P.getContext().getUndef(I->second.first->getType())); 1450 delete I->second.first; 1451 I->second.first = 0; 1452 } 1453 1454 for (std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1455 I = ForwardRefValIDs.begin(), E = ForwardRefValIDs.end(); I != E; ++I) 1456 if (!isa<BasicBlock>(I->second.first)) { 1457 I->second.first->replaceAllUsesWith( 1458 P.getContext().getUndef(I->second.first->getType())); 1459 delete I->second.first; 1460 I->second.first = 0; 1461 } 1462} 1463 1464bool LLParser::PerFunctionState::VerifyFunctionComplete() { 1465 if (!ForwardRefVals.empty()) 1466 return P.Error(ForwardRefVals.begin()->second.second, 1467 "use of undefined value '%" + ForwardRefVals.begin()->first + 1468 "'"); 1469 if (!ForwardRefValIDs.empty()) 1470 return P.Error(ForwardRefValIDs.begin()->second.second, 1471 "use of undefined value '%" + 1472 utostr(ForwardRefValIDs.begin()->first) + "'"); 1473 return false; 1474} 1475 1476 1477/// GetVal - Get a value with the specified name or ID, creating a 1478/// forward reference record if needed. This can return null if the value 1479/// exists but does not have the right type. 1480Value *LLParser::PerFunctionState::GetVal(const std::string &Name, 1481 const Type *Ty, LocTy Loc) { 1482 // Look this name up in the normal function symbol table. 1483 Value *Val = F.getValueSymbolTable().lookup(Name); 1484 1485 // If this is a forward reference for the value, see if we already created a 1486 // forward ref record. 1487 if (Val == 0) { 1488 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1489 I = ForwardRefVals.find(Name); 1490 if (I != ForwardRefVals.end()) 1491 Val = I->second.first; 1492 } 1493 1494 // If we have the value in the symbol table or fwd-ref table, return it. 1495 if (Val) { 1496 if (Val->getType() == Ty) return Val; 1497 if (Ty == Type::LabelTy) 1498 P.Error(Loc, "'%" + Name + "' is not a basic block"); 1499 else 1500 P.Error(Loc, "'%" + Name + "' defined with type '" + 1501 Val->getType()->getDescription() + "'"); 1502 return 0; 1503 } 1504 1505 // Don't make placeholders with invalid type. 1506 if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty) && Ty != Type::LabelTy) { 1507 P.Error(Loc, "invalid use of a non-first-class type"); 1508 return 0; 1509 } 1510 1511 // Otherwise, create a new forward reference for this value and remember it. 1512 Value *FwdVal; 1513 if (Ty == Type::LabelTy) 1514 FwdVal = BasicBlock::Create(Name, &F); 1515 else 1516 FwdVal = new Argument(Ty, Name); 1517 1518 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 1519 return FwdVal; 1520} 1521 1522Value *LLParser::PerFunctionState::GetVal(unsigned ID, const Type *Ty, 1523 LocTy Loc) { 1524 // Look this name up in the normal function symbol table. 1525 Value *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 1526 1527 // If this is a forward reference for the value, see if we already created a 1528 // forward ref record. 1529 if (Val == 0) { 1530 std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1531 I = ForwardRefValIDs.find(ID); 1532 if (I != ForwardRefValIDs.end()) 1533 Val = I->second.first; 1534 } 1535 1536 // If we have the value in the symbol table or fwd-ref table, return it. 1537 if (Val) { 1538 if (Val->getType() == Ty) return Val; 1539 if (Ty == Type::LabelTy) 1540 P.Error(Loc, "'%" + utostr(ID) + "' is not a basic block"); 1541 else 1542 P.Error(Loc, "'%" + utostr(ID) + "' defined with type '" + 1543 Val->getType()->getDescription() + "'"); 1544 return 0; 1545 } 1546 1547 if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty) && Ty != Type::LabelTy) { 1548 P.Error(Loc, "invalid use of a non-first-class type"); 1549 return 0; 1550 } 1551 1552 // Otherwise, create a new forward reference for this value and remember it. 1553 Value *FwdVal; 1554 if (Ty == Type::LabelTy) 1555 FwdVal = BasicBlock::Create("", &F); 1556 else 1557 FwdVal = new Argument(Ty); 1558 1559 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 1560 return FwdVal; 1561} 1562 1563/// SetInstName - After an instruction is parsed and inserted into its 1564/// basic block, this installs its name. 1565bool LLParser::PerFunctionState::SetInstName(int NameID, 1566 const std::string &NameStr, 1567 LocTy NameLoc, Instruction *Inst) { 1568 // If this instruction has void type, it cannot have a name or ID specified. 1569 if (Inst->getType() == Type::VoidTy) { 1570 if (NameID != -1 || !NameStr.empty()) 1571 return P.Error(NameLoc, "instructions returning void cannot have a name"); 1572 return false; 1573 } 1574 1575 // If this was a numbered instruction, verify that the instruction is the 1576 // expected value and resolve any forward references. 1577 if (NameStr.empty()) { 1578 // If neither a name nor an ID was specified, just use the next ID. 1579 if (NameID == -1) 1580 NameID = NumberedVals.size(); 1581 1582 if (unsigned(NameID) != NumberedVals.size()) 1583 return P.Error(NameLoc, "instruction expected to be numbered '%" + 1584 utostr(NumberedVals.size()) + "'"); 1585 1586 std::map<unsigned, std::pair<Value*, LocTy> >::iterator FI = 1587 ForwardRefValIDs.find(NameID); 1588 if (FI != ForwardRefValIDs.end()) { 1589 if (FI->second.first->getType() != Inst->getType()) 1590 return P.Error(NameLoc, "instruction forward referenced with type '" + 1591 FI->second.first->getType()->getDescription() + "'"); 1592 FI->second.first->replaceAllUsesWith(Inst); 1593 ForwardRefValIDs.erase(FI); 1594 } 1595 1596 NumberedVals.push_back(Inst); 1597 return false; 1598 } 1599 1600 // Otherwise, the instruction had a name. Resolve forward refs and set it. 1601 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1602 FI = ForwardRefVals.find(NameStr); 1603 if (FI != ForwardRefVals.end()) { 1604 if (FI->second.first->getType() != Inst->getType()) 1605 return P.Error(NameLoc, "instruction forward referenced with type '" + 1606 FI->second.first->getType()->getDescription() + "'"); 1607 FI->second.first->replaceAllUsesWith(Inst); 1608 ForwardRefVals.erase(FI); 1609 } 1610 1611 // Set the name on the instruction. 1612 Inst->setName(NameStr); 1613 1614 if (Inst->getNameStr() != NameStr) 1615 return P.Error(NameLoc, "multiple definition of local value named '" + 1616 NameStr + "'"); 1617 return false; 1618} 1619 1620/// GetBB - Get a basic block with the specified name or ID, creating a 1621/// forward reference record if needed. 1622BasicBlock *LLParser::PerFunctionState::GetBB(const std::string &Name, 1623 LocTy Loc) { 1624 return cast_or_null<BasicBlock>(GetVal(Name, Type::LabelTy, Loc)); 1625} 1626 1627BasicBlock *LLParser::PerFunctionState::GetBB(unsigned ID, LocTy Loc) { 1628 return cast_or_null<BasicBlock>(GetVal(ID, Type::LabelTy, Loc)); 1629} 1630 1631/// DefineBB - Define the specified basic block, which is either named or 1632/// unnamed. If there is an error, this returns null otherwise it returns 1633/// the block being defined. 1634BasicBlock *LLParser::PerFunctionState::DefineBB(const std::string &Name, 1635 LocTy Loc) { 1636 BasicBlock *BB; 1637 if (Name.empty()) 1638 BB = GetBB(NumberedVals.size(), Loc); 1639 else 1640 BB = GetBB(Name, Loc); 1641 if (BB == 0) return 0; // Already diagnosed error. 1642 1643 // Move the block to the end of the function. Forward ref'd blocks are 1644 // inserted wherever they happen to be referenced. 1645 F.getBasicBlockList().splice(F.end(), F.getBasicBlockList(), BB); 1646 1647 // Remove the block from forward ref sets. 1648 if (Name.empty()) { 1649 ForwardRefValIDs.erase(NumberedVals.size()); 1650 NumberedVals.push_back(BB); 1651 } else { 1652 // BB forward references are already in the function symbol table. 1653 ForwardRefVals.erase(Name); 1654 } 1655 1656 return BB; 1657} 1658 1659//===----------------------------------------------------------------------===// 1660// Constants. 1661//===----------------------------------------------------------------------===// 1662 1663/// ParseValID - Parse an abstract value that doesn't necessarily have a 1664/// type implied. For example, if we parse "4" we don't know what integer type 1665/// it has. The value will later be combined with its type and checked for 1666/// sanity. 1667bool LLParser::ParseValID(ValID &ID) { 1668 ID.Loc = Lex.getLoc(); 1669 switch (Lex.getKind()) { 1670 default: return TokError("expected value token"); 1671 case lltok::GlobalID: // @42 1672 ID.UIntVal = Lex.getUIntVal(); 1673 ID.Kind = ValID::t_GlobalID; 1674 break; 1675 case lltok::GlobalVar: // @foo 1676 ID.StrVal = Lex.getStrVal(); 1677 ID.Kind = ValID::t_GlobalName; 1678 break; 1679 case lltok::LocalVarID: // %42 1680 ID.UIntVal = Lex.getUIntVal(); 1681 ID.Kind = ValID::t_LocalID; 1682 break; 1683 case lltok::LocalVar: // %foo 1684 case lltok::StringConstant: // "foo" - FIXME: REMOVE IN LLVM 3.0 1685 ID.StrVal = Lex.getStrVal(); 1686 ID.Kind = ValID::t_LocalName; 1687 break; 1688 case lltok::Metadata: { // !{...} MDNode, !"foo" MDString 1689 ID.Kind = ValID::t_Metadata; 1690 Lex.Lex(); 1691 if (Lex.getKind() == lltok::lbrace) { 1692 SmallVector<Value*, 16> Elts; 1693 if (ParseMDNodeVector(Elts) || 1694 ParseToken(lltok::rbrace, "expected end of metadata node")) 1695 return true; 1696 1697 ID.MetadataVal = Context.getMDNode(Elts.data(), Elts.size()); 1698 return false; 1699 } 1700 1701 // Standalone metadata reference 1702 // !{ ..., !42, ... } 1703 if (!ParseMDNode(ID.MetadataVal)) 1704 return false; 1705 1706 // MDString: 1707 // ::= '!' STRINGCONSTANT 1708 if (ParseMDString(ID.MetadataVal)) return true; 1709 ID.Kind = ValID::t_Metadata; 1710 return false; 1711 } 1712 case lltok::APSInt: 1713 ID.APSIntVal = Lex.getAPSIntVal(); 1714 ID.Kind = ValID::t_APSInt; 1715 break; 1716 case lltok::APFloat: 1717 ID.APFloatVal = Lex.getAPFloatVal(); 1718 ID.Kind = ValID::t_APFloat; 1719 break; 1720 case lltok::kw_true: 1721 ID.ConstantVal = Context.getTrue(); 1722 ID.Kind = ValID::t_Constant; 1723 break; 1724 case lltok::kw_false: 1725 ID.ConstantVal = Context.getFalse(); 1726 ID.Kind = ValID::t_Constant; 1727 break; 1728 case lltok::kw_null: ID.Kind = ValID::t_Null; break; 1729 case lltok::kw_undef: ID.Kind = ValID::t_Undef; break; 1730 case lltok::kw_zeroinitializer: ID.Kind = ValID::t_Zero; break; 1731 1732 case lltok::lbrace: { 1733 // ValID ::= '{' ConstVector '}' 1734 Lex.Lex(); 1735 SmallVector<Constant*, 16> Elts; 1736 if (ParseGlobalValueVector(Elts) || 1737 ParseToken(lltok::rbrace, "expected end of struct constant")) 1738 return true; 1739 1740 ID.ConstantVal = ConstantStruct::get(Elts.data(), Elts.size(), false); 1741 ID.Kind = ValID::t_Constant; 1742 return false; 1743 } 1744 case lltok::less: { 1745 // ValID ::= '<' ConstVector '>' --> Vector. 1746 // ValID ::= '<' '{' ConstVector '}' '>' --> Packed Struct. 1747 Lex.Lex(); 1748 bool isPackedStruct = EatIfPresent(lltok::lbrace); 1749 1750 SmallVector<Constant*, 16> Elts; 1751 LocTy FirstEltLoc = Lex.getLoc(); 1752 if (ParseGlobalValueVector(Elts) || 1753 (isPackedStruct && 1754 ParseToken(lltok::rbrace, "expected end of packed struct")) || 1755 ParseToken(lltok::greater, "expected end of constant")) 1756 return true; 1757 1758 if (isPackedStruct) { 1759 ID.ConstantVal = 1760 ConstantStruct::get(Elts.data(), Elts.size(), true); 1761 ID.Kind = ValID::t_Constant; 1762 return false; 1763 } 1764 1765 if (Elts.empty()) 1766 return Error(ID.Loc, "constant vector must not be empty"); 1767 1768 if (!Elts[0]->getType()->isInteger() && 1769 !Elts[0]->getType()->isFloatingPoint()) 1770 return Error(FirstEltLoc, 1771 "vector elements must have integer or floating point type"); 1772 1773 // Verify that all the vector elements have the same type. 1774 for (unsigned i = 1, e = Elts.size(); i != e; ++i) 1775 if (Elts[i]->getType() != Elts[0]->getType()) 1776 return Error(FirstEltLoc, 1777 "vector element #" + utostr(i) + 1778 " is not of type '" + Elts[0]->getType()->getDescription()); 1779 1780 ID.ConstantVal = Context.getConstantVector(Elts.data(), Elts.size()); 1781 ID.Kind = ValID::t_Constant; 1782 return false; 1783 } 1784 case lltok::lsquare: { // Array Constant 1785 Lex.Lex(); 1786 SmallVector<Constant*, 16> Elts; 1787 LocTy FirstEltLoc = Lex.getLoc(); 1788 if (ParseGlobalValueVector(Elts) || 1789 ParseToken(lltok::rsquare, "expected end of array constant")) 1790 return true; 1791 1792 // Handle empty element. 1793 if (Elts.empty()) { 1794 // Use undef instead of an array because it's inconvenient to determine 1795 // the element type at this point, there being no elements to examine. 1796 ID.Kind = ValID::t_EmptyArray; 1797 return false; 1798 } 1799 1800 if (!Elts[0]->getType()->isFirstClassType()) 1801 return Error(FirstEltLoc, "invalid array element type: " + 1802 Elts[0]->getType()->getDescription()); 1803 1804 ArrayType *ATy = Context.getArrayType(Elts[0]->getType(), Elts.size()); 1805 1806 // Verify all elements are correct type! 1807 for (unsigned i = 0, e = Elts.size(); i != e; ++i) { 1808 if (Elts[i]->getType() != Elts[0]->getType()) 1809 return Error(FirstEltLoc, 1810 "array element #" + utostr(i) + 1811 " is not of type '" +Elts[0]->getType()->getDescription()); 1812 } 1813 1814 ID.ConstantVal = ConstantArray::get(ATy, Elts.data(), Elts.size()); 1815 ID.Kind = ValID::t_Constant; 1816 return false; 1817 } 1818 case lltok::kw_c: // c "foo" 1819 Lex.Lex(); 1820 ID.ConstantVal = ConstantArray::get(Lex.getStrVal(), false); 1821 if (ParseToken(lltok::StringConstant, "expected string")) return true; 1822 ID.Kind = ValID::t_Constant; 1823 return false; 1824 1825 case lltok::kw_asm: { 1826 // ValID ::= 'asm' SideEffect? STRINGCONSTANT ',' STRINGCONSTANT 1827 bool HasSideEffect; 1828 Lex.Lex(); 1829 if (ParseOptionalToken(lltok::kw_sideeffect, HasSideEffect) || 1830 ParseStringConstant(ID.StrVal) || 1831 ParseToken(lltok::comma, "expected comma in inline asm expression") || 1832 ParseToken(lltok::StringConstant, "expected constraint string")) 1833 return true; 1834 ID.StrVal2 = Lex.getStrVal(); 1835 ID.UIntVal = HasSideEffect; 1836 ID.Kind = ValID::t_InlineAsm; 1837 return false; 1838 } 1839 1840 case lltok::kw_trunc: 1841 case lltok::kw_zext: 1842 case lltok::kw_sext: 1843 case lltok::kw_fptrunc: 1844 case lltok::kw_fpext: 1845 case lltok::kw_bitcast: 1846 case lltok::kw_uitofp: 1847 case lltok::kw_sitofp: 1848 case lltok::kw_fptoui: 1849 case lltok::kw_fptosi: 1850 case lltok::kw_inttoptr: 1851 case lltok::kw_ptrtoint: { 1852 unsigned Opc = Lex.getUIntVal(); 1853 PATypeHolder DestTy(Type::VoidTy); 1854 Constant *SrcVal; 1855 Lex.Lex(); 1856 if (ParseToken(lltok::lparen, "expected '(' after constantexpr cast") || 1857 ParseGlobalTypeAndValue(SrcVal) || 1858 ParseToken(lltok::kw_to, "expected 'to' in constantexpr cast") || 1859 ParseType(DestTy) || 1860 ParseToken(lltok::rparen, "expected ')' at end of constantexpr cast")) 1861 return true; 1862 if (!CastInst::castIsValid((Instruction::CastOps)Opc, SrcVal, DestTy)) 1863 return Error(ID.Loc, "invalid cast opcode for cast from '" + 1864 SrcVal->getType()->getDescription() + "' to '" + 1865 DestTy->getDescription() + "'"); 1866 ID.ConstantVal = Context.getConstantExprCast((Instruction::CastOps)Opc, 1867 SrcVal, DestTy); 1868 ID.Kind = ValID::t_Constant; 1869 return false; 1870 } 1871 case lltok::kw_extractvalue: { 1872 Lex.Lex(); 1873 Constant *Val; 1874 SmallVector<unsigned, 4> Indices; 1875 if (ParseToken(lltok::lparen, "expected '(' in extractvalue constantexpr")|| 1876 ParseGlobalTypeAndValue(Val) || 1877 ParseIndexList(Indices) || 1878 ParseToken(lltok::rparen, "expected ')' in extractvalue constantexpr")) 1879 return true; 1880 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 1881 return Error(ID.Loc, "extractvalue operand must be array or struct"); 1882 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 1883 Indices.end())) 1884 return Error(ID.Loc, "invalid indices for extractvalue"); 1885 ID.ConstantVal = 1886 Context.getConstantExprExtractValue(Val, Indices.data(), Indices.size()); 1887 ID.Kind = ValID::t_Constant; 1888 return false; 1889 } 1890 case lltok::kw_insertvalue: { 1891 Lex.Lex(); 1892 Constant *Val0, *Val1; 1893 SmallVector<unsigned, 4> Indices; 1894 if (ParseToken(lltok::lparen, "expected '(' in insertvalue constantexpr")|| 1895 ParseGlobalTypeAndValue(Val0) || 1896 ParseToken(lltok::comma, "expected comma in insertvalue constantexpr")|| 1897 ParseGlobalTypeAndValue(Val1) || 1898 ParseIndexList(Indices) || 1899 ParseToken(lltok::rparen, "expected ')' in insertvalue constantexpr")) 1900 return true; 1901 if (!isa<StructType>(Val0->getType()) && !isa<ArrayType>(Val0->getType())) 1902 return Error(ID.Loc, "extractvalue operand must be array or struct"); 1903 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 1904 Indices.end())) 1905 return Error(ID.Loc, "invalid indices for insertvalue"); 1906 ID.ConstantVal = Context.getConstantExprInsertValue(Val0, Val1, 1907 Indices.data(), Indices.size()); 1908 ID.Kind = ValID::t_Constant; 1909 return false; 1910 } 1911 case lltok::kw_icmp: 1912 case lltok::kw_fcmp: { 1913 unsigned PredVal, Opc = Lex.getUIntVal(); 1914 Constant *Val0, *Val1; 1915 Lex.Lex(); 1916 if (ParseCmpPredicate(PredVal, Opc) || 1917 ParseToken(lltok::lparen, "expected '(' in compare constantexpr") || 1918 ParseGlobalTypeAndValue(Val0) || 1919 ParseToken(lltok::comma, "expected comma in compare constantexpr") || 1920 ParseGlobalTypeAndValue(Val1) || 1921 ParseToken(lltok::rparen, "expected ')' in compare constantexpr")) 1922 return true; 1923 1924 if (Val0->getType() != Val1->getType()) 1925 return Error(ID.Loc, "compare operands must have the same type"); 1926 1927 CmpInst::Predicate Pred = (CmpInst::Predicate)PredVal; 1928 1929 if (Opc == Instruction::FCmp) { 1930 if (!Val0->getType()->isFPOrFPVector()) 1931 return Error(ID.Loc, "fcmp requires floating point operands"); 1932 ID.ConstantVal = Context.getConstantExprFCmp(Pred, Val0, Val1); 1933 } else { 1934 assert(Opc == Instruction::ICmp && "Unexpected opcode for CmpInst!"); 1935 if (!Val0->getType()->isIntOrIntVector() && 1936 !isa<PointerType>(Val0->getType())) 1937 return Error(ID.Loc, "icmp requires pointer or integer operands"); 1938 ID.ConstantVal = Context.getConstantExprICmp(Pred, Val0, Val1); 1939 } 1940 ID.Kind = ValID::t_Constant; 1941 return false; 1942 } 1943 1944 // Binary Operators. 1945 case lltok::kw_add: 1946 case lltok::kw_fadd: 1947 case lltok::kw_sub: 1948 case lltok::kw_fsub: 1949 case lltok::kw_mul: 1950 case lltok::kw_fmul: 1951 case lltok::kw_udiv: 1952 case lltok::kw_sdiv: 1953 case lltok::kw_fdiv: 1954 case lltok::kw_urem: 1955 case lltok::kw_srem: 1956 case lltok::kw_frem: { 1957 bool NUW = false; 1958 bool NSW = false; 1959 bool Exact = false; 1960 unsigned Opc = Lex.getUIntVal(); 1961 Constant *Val0, *Val1; 1962 Lex.Lex(); 1963 LocTy ModifierLoc = Lex.getLoc(); 1964 if (Opc == Instruction::Add || 1965 Opc == Instruction::Sub || 1966 Opc == Instruction::Mul) { 1967 if (EatIfPresent(lltok::kw_nuw)) 1968 NUW = true; 1969 if (EatIfPresent(lltok::kw_nsw)) { 1970 NSW = true; 1971 if (EatIfPresent(lltok::kw_nuw)) 1972 NUW = true; 1973 } 1974 } else if (Opc == Instruction::SDiv) { 1975 if (EatIfPresent(lltok::kw_exact)) 1976 Exact = true; 1977 } 1978 if (ParseToken(lltok::lparen, "expected '(' in binary constantexpr") || 1979 ParseGlobalTypeAndValue(Val0) || 1980 ParseToken(lltok::comma, "expected comma in binary constantexpr") || 1981 ParseGlobalTypeAndValue(Val1) || 1982 ParseToken(lltok::rparen, "expected ')' in binary constantexpr")) 1983 return true; 1984 if (Val0->getType() != Val1->getType()) 1985 return Error(ID.Loc, "operands of constexpr must have same type"); 1986 if (!Val0->getType()->isIntOrIntVector()) { 1987 if (NUW) 1988 return Error(ModifierLoc, "nuw only applies to integer operations"); 1989 if (NSW) 1990 return Error(ModifierLoc, "nsw only applies to integer operations"); 1991 } 1992 // API compatibility: Accept either integer or floating-point types with 1993 // add, sub, and mul. 1994 if (!Val0->getType()->isIntOrIntVector() && 1995 !Val0->getType()->isFPOrFPVector()) 1996 return Error(ID.Loc,"constexpr requires integer, fp, or vector operands"); 1997 Constant *C = Context.getConstantExpr(Opc, Val0, Val1); 1998 if (NUW) 1999 cast<OverflowingBinaryOperator>(C)->setHasNoUnsignedOverflow(true); 2000 if (NSW) 2001 cast<OverflowingBinaryOperator>(C)->setHasNoSignedOverflow(true); 2002 if (Exact) 2003 cast<SDivOperator>(C)->setIsExact(true); 2004 ID.ConstantVal = C; 2005 ID.Kind = ValID::t_Constant; 2006 return false; 2007 } 2008 2009 // Logical Operations 2010 case lltok::kw_shl: 2011 case lltok::kw_lshr: 2012 case lltok::kw_ashr: 2013 case lltok::kw_and: 2014 case lltok::kw_or: 2015 case lltok::kw_xor: { 2016 unsigned Opc = Lex.getUIntVal(); 2017 Constant *Val0, *Val1; 2018 Lex.Lex(); 2019 if (ParseToken(lltok::lparen, "expected '(' in logical constantexpr") || 2020 ParseGlobalTypeAndValue(Val0) || 2021 ParseToken(lltok::comma, "expected comma in logical constantexpr") || 2022 ParseGlobalTypeAndValue(Val1) || 2023 ParseToken(lltok::rparen, "expected ')' in logical constantexpr")) 2024 return true; 2025 if (Val0->getType() != Val1->getType()) 2026 return Error(ID.Loc, "operands of constexpr must have same type"); 2027 if (!Val0->getType()->isIntOrIntVector()) 2028 return Error(ID.Loc, 2029 "constexpr requires integer or integer vector operands"); 2030 ID.ConstantVal = Context.getConstantExpr(Opc, Val0, Val1); 2031 ID.Kind = ValID::t_Constant; 2032 return false; 2033 } 2034 2035 case lltok::kw_getelementptr: 2036 case lltok::kw_shufflevector: 2037 case lltok::kw_insertelement: 2038 case lltok::kw_extractelement: 2039 case lltok::kw_select: { 2040 unsigned Opc = Lex.getUIntVal(); 2041 SmallVector<Constant*, 16> Elts; 2042 bool InBounds = false; 2043 Lex.Lex(); 2044 if (Opc == Instruction::GetElementPtr) 2045 if (EatIfPresent(lltok::kw_inbounds)) 2046 InBounds = true; 2047 if (ParseToken(lltok::lparen, "expected '(' in constantexpr") || 2048 ParseGlobalValueVector(Elts) || 2049 ParseToken(lltok::rparen, "expected ')' in constantexpr")) 2050 return true; 2051 2052 if (Opc == Instruction::GetElementPtr) { 2053 if (Elts.size() == 0 || !isa<PointerType>(Elts[0]->getType())) 2054 return Error(ID.Loc, "getelementptr requires pointer operand"); 2055 2056 if (!GetElementPtrInst::getIndexedType(Elts[0]->getType(), 2057 (Value**)(Elts.data() + 1), 2058 Elts.size() - 1)) 2059 return Error(ID.Loc, "invalid indices for getelementptr"); 2060 ID.ConstantVal = Context.getConstantExprGetElementPtr(Elts[0], 2061 Elts.data() + 1, Elts.size() - 1); 2062 if (InBounds) 2063 cast<GEPOperator>(ID.ConstantVal)->setIsInBounds(true); 2064 } else if (Opc == Instruction::Select) { 2065 if (Elts.size() != 3) 2066 return Error(ID.Loc, "expected three operands to select"); 2067 if (const char *Reason = SelectInst::areInvalidOperands(Elts[0], Elts[1], 2068 Elts[2])) 2069 return Error(ID.Loc, Reason); 2070 ID.ConstantVal = Context.getConstantExprSelect(Elts[0], Elts[1], Elts[2]); 2071 } else if (Opc == Instruction::ShuffleVector) { 2072 if (Elts.size() != 3) 2073 return Error(ID.Loc, "expected three operands to shufflevector"); 2074 if (!ShuffleVectorInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2075 return Error(ID.Loc, "invalid operands to shufflevector"); 2076 ID.ConstantVal = 2077 Context.getConstantExprShuffleVector(Elts[0], Elts[1],Elts[2]); 2078 } else if (Opc == Instruction::ExtractElement) { 2079 if (Elts.size() != 2) 2080 return Error(ID.Loc, "expected two operands to extractelement"); 2081 if (!ExtractElementInst::isValidOperands(Elts[0], Elts[1])) 2082 return Error(ID.Loc, "invalid extractelement operands"); 2083 ID.ConstantVal = Context.getConstantExprExtractElement(Elts[0], Elts[1]); 2084 } else { 2085 assert(Opc == Instruction::InsertElement && "Unknown opcode"); 2086 if (Elts.size() != 3) 2087 return Error(ID.Loc, "expected three operands to insertelement"); 2088 if (!InsertElementInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2089 return Error(ID.Loc, "invalid insertelement operands"); 2090 ID.ConstantVal = 2091 Context.getConstantExprInsertElement(Elts[0], Elts[1],Elts[2]); 2092 } 2093 2094 ID.Kind = ValID::t_Constant; 2095 return false; 2096 } 2097 } 2098 2099 Lex.Lex(); 2100 return false; 2101} 2102 2103/// ParseGlobalValue - Parse a global value with the specified type. 2104bool LLParser::ParseGlobalValue(const Type *Ty, Constant *&V) { 2105 V = 0; 2106 ValID ID; 2107 return ParseValID(ID) || 2108 ConvertGlobalValIDToValue(Ty, ID, V); 2109} 2110 2111/// ConvertGlobalValIDToValue - Apply a type to a ValID to get a fully resolved 2112/// constant. 2113bool LLParser::ConvertGlobalValIDToValue(const Type *Ty, ValID &ID, 2114 Constant *&V) { 2115 if (isa<FunctionType>(Ty)) 2116 return Error(ID.Loc, "functions are not values, refer to them as pointers"); 2117 2118 switch (ID.Kind) { 2119 default: llvm_unreachable("Unknown ValID!"); 2120 case ValID::t_Metadata: 2121 return Error(ID.Loc, "invalid use of metadata"); 2122 case ValID::t_LocalID: 2123 case ValID::t_LocalName: 2124 return Error(ID.Loc, "invalid use of function-local name"); 2125 case ValID::t_InlineAsm: 2126 return Error(ID.Loc, "inline asm can only be an operand of call/invoke"); 2127 case ValID::t_GlobalName: 2128 V = GetGlobalVal(ID.StrVal, Ty, ID.Loc); 2129 return V == 0; 2130 case ValID::t_GlobalID: 2131 V = GetGlobalVal(ID.UIntVal, Ty, ID.Loc); 2132 return V == 0; 2133 case ValID::t_APSInt: 2134 if (!isa<IntegerType>(Ty)) 2135 return Error(ID.Loc, "integer constant must have integer type"); 2136 ID.APSIntVal.extOrTrunc(Ty->getPrimitiveSizeInBits()); 2137 V = ConstantInt::get(Context, ID.APSIntVal); 2138 return false; 2139 case ValID::t_APFloat: 2140 if (!Ty->isFloatingPoint() || 2141 !ConstantFP::isValueValidForType(Ty, ID.APFloatVal)) 2142 return Error(ID.Loc, "floating point constant invalid for type"); 2143 2144 // The lexer has no type info, so builds all float and double FP constants 2145 // as double. Fix this here. Long double does not need this. 2146 if (&ID.APFloatVal.getSemantics() == &APFloat::IEEEdouble && 2147 Ty == Type::FloatTy) { 2148 bool Ignored; 2149 ID.APFloatVal.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, 2150 &Ignored); 2151 } 2152 V = ConstantFP::get(Context, ID.APFloatVal); 2153 2154 if (V->getType() != Ty) 2155 return Error(ID.Loc, "floating point constant does not have type '" + 2156 Ty->getDescription() + "'"); 2157 2158 return false; 2159 case ValID::t_Null: 2160 if (!isa<PointerType>(Ty)) 2161 return Error(ID.Loc, "null must be a pointer type"); 2162 V = Context.getConstantPointerNull(cast<PointerType>(Ty)); 2163 return false; 2164 case ValID::t_Undef: 2165 // FIXME: LabelTy should not be a first-class type. 2166 if ((!Ty->isFirstClassType() || Ty == Type::LabelTy) && 2167 !isa<OpaqueType>(Ty)) 2168 return Error(ID.Loc, "invalid type for undef constant"); 2169 V = Context.getUndef(Ty); 2170 return false; 2171 case ValID::t_EmptyArray: 2172 if (!isa<ArrayType>(Ty) || cast<ArrayType>(Ty)->getNumElements() != 0) 2173 return Error(ID.Loc, "invalid empty array initializer"); 2174 V = Context.getUndef(Ty); 2175 return false; 2176 case ValID::t_Zero: 2177 // FIXME: LabelTy should not be a first-class type. 2178 if (!Ty->isFirstClassType() || Ty == Type::LabelTy) 2179 return Error(ID.Loc, "invalid type for null constant"); 2180 V = Context.getNullValue(Ty); 2181 return false; 2182 case ValID::t_Constant: 2183 if (ID.ConstantVal->getType() != Ty) 2184 return Error(ID.Loc, "constant expression type mismatch"); 2185 V = ID.ConstantVal; 2186 return false; 2187 } 2188} 2189 2190bool LLParser::ParseGlobalTypeAndValue(Constant *&V) { 2191 PATypeHolder Type(Type::VoidTy); 2192 return ParseType(Type) || 2193 ParseGlobalValue(Type, V); 2194} 2195 2196/// ParseGlobalValueVector 2197/// ::= /*empty*/ 2198/// ::= TypeAndValue (',' TypeAndValue)* 2199bool LLParser::ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts) { 2200 // Empty list. 2201 if (Lex.getKind() == lltok::rbrace || 2202 Lex.getKind() == lltok::rsquare || 2203 Lex.getKind() == lltok::greater || 2204 Lex.getKind() == lltok::rparen) 2205 return false; 2206 2207 Constant *C; 2208 if (ParseGlobalTypeAndValue(C)) return true; 2209 Elts.push_back(C); 2210 2211 while (EatIfPresent(lltok::comma)) { 2212 if (ParseGlobalTypeAndValue(C)) return true; 2213 Elts.push_back(C); 2214 } 2215 2216 return false; 2217} 2218 2219 2220//===----------------------------------------------------------------------===// 2221// Function Parsing. 2222//===----------------------------------------------------------------------===// 2223 2224bool LLParser::ConvertValIDToValue(const Type *Ty, ValID &ID, Value *&V, 2225 PerFunctionState &PFS) { 2226 if (ID.Kind == ValID::t_LocalID) 2227 V = PFS.GetVal(ID.UIntVal, Ty, ID.Loc); 2228 else if (ID.Kind == ValID::t_LocalName) 2229 V = PFS.GetVal(ID.StrVal, Ty, ID.Loc); 2230 else if (ID.Kind == ValID::t_InlineAsm) { 2231 const PointerType *PTy = dyn_cast<PointerType>(Ty); 2232 const FunctionType *FTy = 2233 PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : 0; 2234 if (!FTy || !InlineAsm::Verify(FTy, ID.StrVal2)) 2235 return Error(ID.Loc, "invalid type for inline asm constraint string"); 2236 V = InlineAsm::get(FTy, ID.StrVal, ID.StrVal2, ID.UIntVal); 2237 return false; 2238 } else if (ID.Kind == ValID::t_Metadata) { 2239 V = ID.MetadataVal; 2240 } else { 2241 Constant *C; 2242 if (ConvertGlobalValIDToValue(Ty, ID, C)) return true; 2243 V = C; 2244 return false; 2245 } 2246 2247 return V == 0; 2248} 2249 2250bool LLParser::ParseValue(const Type *Ty, Value *&V, PerFunctionState &PFS) { 2251 V = 0; 2252 ValID ID; 2253 return ParseValID(ID) || 2254 ConvertValIDToValue(Ty, ID, V, PFS); 2255} 2256 2257bool LLParser::ParseTypeAndValue(Value *&V, PerFunctionState &PFS) { 2258 PATypeHolder T(Type::VoidTy); 2259 return ParseType(T) || 2260 ParseValue(T, V, PFS); 2261} 2262 2263/// FunctionHeader 2264/// ::= OptionalLinkage OptionalVisibility OptionalCallingConv OptRetAttrs 2265/// Type GlobalName '(' ArgList ')' OptFuncAttrs OptSection 2266/// OptionalAlign OptGC 2267bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) { 2268 // Parse the linkage. 2269 LocTy LinkageLoc = Lex.getLoc(); 2270 unsigned Linkage; 2271 2272 unsigned Visibility, CC, RetAttrs; 2273 PATypeHolder RetType(Type::VoidTy); 2274 LocTy RetTypeLoc = Lex.getLoc(); 2275 if (ParseOptionalLinkage(Linkage) || 2276 ParseOptionalVisibility(Visibility) || 2277 ParseOptionalCallingConv(CC) || 2278 ParseOptionalAttrs(RetAttrs, 1) || 2279 ParseType(RetType, RetTypeLoc, true /*void allowed*/)) 2280 return true; 2281 2282 // Verify that the linkage is ok. 2283 switch ((GlobalValue::LinkageTypes)Linkage) { 2284 case GlobalValue::ExternalLinkage: 2285 break; // always ok. 2286 case GlobalValue::DLLImportLinkage: 2287 case GlobalValue::ExternalWeakLinkage: 2288 if (isDefine) 2289 return Error(LinkageLoc, "invalid linkage for function definition"); 2290 break; 2291 case GlobalValue::PrivateLinkage: 2292 case GlobalValue::LinkerPrivateLinkage: 2293 case GlobalValue::InternalLinkage: 2294 case GlobalValue::AvailableExternallyLinkage: 2295 case GlobalValue::LinkOnceAnyLinkage: 2296 case GlobalValue::LinkOnceODRLinkage: 2297 case GlobalValue::WeakAnyLinkage: 2298 case GlobalValue::WeakODRLinkage: 2299 case GlobalValue::DLLExportLinkage: 2300 if (!isDefine) 2301 return Error(LinkageLoc, "invalid linkage for function declaration"); 2302 break; 2303 case GlobalValue::AppendingLinkage: 2304 case GlobalValue::GhostLinkage: 2305 case GlobalValue::CommonLinkage: 2306 return Error(LinkageLoc, "invalid function linkage type"); 2307 } 2308 2309 if (!FunctionType::isValidReturnType(RetType) || 2310 isa<OpaqueType>(RetType)) 2311 return Error(RetTypeLoc, "invalid function return type"); 2312 2313 LocTy NameLoc = Lex.getLoc(); 2314 2315 std::string FunctionName; 2316 if (Lex.getKind() == lltok::GlobalVar) { 2317 FunctionName = Lex.getStrVal(); 2318 } else if (Lex.getKind() == lltok::GlobalID) { // @42 is ok. 2319 unsigned NameID = Lex.getUIntVal(); 2320 2321 if (NameID != NumberedVals.size()) 2322 return TokError("function expected to be numbered '%" + 2323 utostr(NumberedVals.size()) + "'"); 2324 } else { 2325 return TokError("expected function name"); 2326 } 2327 2328 Lex.Lex(); 2329 2330 if (Lex.getKind() != lltok::lparen) 2331 return TokError("expected '(' in function argument list"); 2332 2333 std::vector<ArgInfo> ArgList; 2334 bool isVarArg; 2335 unsigned FuncAttrs; 2336 std::string Section; 2337 unsigned Alignment; 2338 std::string GC; 2339 2340 if (ParseArgumentList(ArgList, isVarArg, false) || 2341 ParseOptionalAttrs(FuncAttrs, 2) || 2342 (EatIfPresent(lltok::kw_section) && 2343 ParseStringConstant(Section)) || 2344 ParseOptionalAlignment(Alignment) || 2345 (EatIfPresent(lltok::kw_gc) && 2346 ParseStringConstant(GC))) 2347 return true; 2348 2349 // If the alignment was parsed as an attribute, move to the alignment field. 2350 if (FuncAttrs & Attribute::Alignment) { 2351 Alignment = Attribute::getAlignmentFromAttrs(FuncAttrs); 2352 FuncAttrs &= ~Attribute::Alignment; 2353 } 2354 2355 // Okay, if we got here, the function is syntactically valid. Convert types 2356 // and do semantic checks. 2357 std::vector<const Type*> ParamTypeList; 2358 SmallVector<AttributeWithIndex, 8> Attrs; 2359 // FIXME : In 3.0, stop accepting zext, sext and inreg as optional function 2360 // attributes. 2361 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 2362 if (FuncAttrs & ObsoleteFuncAttrs) { 2363 RetAttrs |= FuncAttrs & ObsoleteFuncAttrs; 2364 FuncAttrs &= ~ObsoleteFuncAttrs; 2365 } 2366 2367 if (RetAttrs != Attribute::None) 2368 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 2369 2370 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 2371 ParamTypeList.push_back(ArgList[i].Type); 2372 if (ArgList[i].Attrs != Attribute::None) 2373 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 2374 } 2375 2376 if (FuncAttrs != Attribute::None) 2377 Attrs.push_back(AttributeWithIndex::get(~0, FuncAttrs)); 2378 2379 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 2380 2381 if (PAL.paramHasAttr(1, Attribute::StructRet) && 2382 RetType != Type::VoidTy) 2383 return Error(RetTypeLoc, "functions with 'sret' argument must return void"); 2384 2385 const FunctionType *FT = 2386 Context.getFunctionType(RetType, ParamTypeList, isVarArg); 2387 const PointerType *PFT = Context.getPointerTypeUnqual(FT); 2388 2389 Fn = 0; 2390 if (!FunctionName.empty()) { 2391 // If this was a definition of a forward reference, remove the definition 2392 // from the forward reference table and fill in the forward ref. 2393 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator FRVI = 2394 ForwardRefVals.find(FunctionName); 2395 if (FRVI != ForwardRefVals.end()) { 2396 Fn = M->getFunction(FunctionName); 2397 ForwardRefVals.erase(FRVI); 2398 } else if ((Fn = M->getFunction(FunctionName))) { 2399 // If this function already exists in the symbol table, then it is 2400 // multiply defined. We accept a few cases for old backwards compat. 2401 // FIXME: Remove this stuff for LLVM 3.0. 2402 if (Fn->getType() != PFT || Fn->getAttributes() != PAL || 2403 (!Fn->isDeclaration() && isDefine)) { 2404 // If the redefinition has different type or different attributes, 2405 // reject it. If both have bodies, reject it. 2406 return Error(NameLoc, "invalid redefinition of function '" + 2407 FunctionName + "'"); 2408 } else if (Fn->isDeclaration()) { 2409 // Make sure to strip off any argument names so we can't get conflicts. 2410 for (Function::arg_iterator AI = Fn->arg_begin(), AE = Fn->arg_end(); 2411 AI != AE; ++AI) 2412 AI->setName(""); 2413 } 2414 } 2415 2416 } else if (FunctionName.empty()) { 2417 // If this is a definition of a forward referenced function, make sure the 2418 // types agree. 2419 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator I 2420 = ForwardRefValIDs.find(NumberedVals.size()); 2421 if (I != ForwardRefValIDs.end()) { 2422 Fn = cast<Function>(I->second.first); 2423 if (Fn->getType() != PFT) 2424 return Error(NameLoc, "type of definition and forward reference of '@" + 2425 utostr(NumberedVals.size()) +"' disagree"); 2426 ForwardRefValIDs.erase(I); 2427 } 2428 } 2429 2430 if (Fn == 0) 2431 Fn = Function::Create(FT, GlobalValue::ExternalLinkage, FunctionName, M); 2432 else // Move the forward-reference to the correct spot in the module. 2433 M->getFunctionList().splice(M->end(), M->getFunctionList(), Fn); 2434 2435 if (FunctionName.empty()) 2436 NumberedVals.push_back(Fn); 2437 2438 Fn->setLinkage((GlobalValue::LinkageTypes)Linkage); 2439 Fn->setVisibility((GlobalValue::VisibilityTypes)Visibility); 2440 Fn->setCallingConv(CC); 2441 Fn->setAttributes(PAL); 2442 Fn->setAlignment(Alignment); 2443 Fn->setSection(Section); 2444 if (!GC.empty()) Fn->setGC(GC.c_str()); 2445 2446 // Add all of the arguments we parsed to the function. 2447 Function::arg_iterator ArgIt = Fn->arg_begin(); 2448 for (unsigned i = 0, e = ArgList.size(); i != e; ++i, ++ArgIt) { 2449 // If the argument has a name, insert it into the argument symbol table. 2450 if (ArgList[i].Name.empty()) continue; 2451 2452 // Set the name, if it conflicted, it will be auto-renamed. 2453 ArgIt->setName(ArgList[i].Name); 2454 2455 if (ArgIt->getNameStr() != ArgList[i].Name) 2456 return Error(ArgList[i].Loc, "redefinition of argument '%" + 2457 ArgList[i].Name + "'"); 2458 } 2459 2460 return false; 2461} 2462 2463 2464/// ParseFunctionBody 2465/// ::= '{' BasicBlock+ '}' 2466/// ::= 'begin' BasicBlock+ 'end' // FIXME: remove in LLVM 3.0 2467/// 2468bool LLParser::ParseFunctionBody(Function &Fn) { 2469 if (Lex.getKind() != lltok::lbrace && Lex.getKind() != lltok::kw_begin) 2470 return TokError("expected '{' in function body"); 2471 Lex.Lex(); // eat the {. 2472 2473 PerFunctionState PFS(*this, Fn); 2474 2475 while (Lex.getKind() != lltok::rbrace && Lex.getKind() != lltok::kw_end) 2476 if (ParseBasicBlock(PFS)) return true; 2477 2478 // Eat the }. 2479 Lex.Lex(); 2480 2481 // Verify function is ok. 2482 return PFS.VerifyFunctionComplete(); 2483} 2484 2485/// ParseBasicBlock 2486/// ::= LabelStr? Instruction* 2487bool LLParser::ParseBasicBlock(PerFunctionState &PFS) { 2488 // If this basic block starts out with a name, remember it. 2489 std::string Name; 2490 LocTy NameLoc = Lex.getLoc(); 2491 if (Lex.getKind() == lltok::LabelStr) { 2492 Name = Lex.getStrVal(); 2493 Lex.Lex(); 2494 } 2495 2496 BasicBlock *BB = PFS.DefineBB(Name, NameLoc); 2497 if (BB == 0) return true; 2498 2499 std::string NameStr; 2500 2501 // Parse the instructions in this block until we get a terminator. 2502 Instruction *Inst; 2503 do { 2504 // This instruction may have three possibilities for a name: a) none 2505 // specified, b) name specified "%foo =", c) number specified: "%4 =". 2506 LocTy NameLoc = Lex.getLoc(); 2507 int NameID = -1; 2508 NameStr = ""; 2509 2510 if (Lex.getKind() == lltok::LocalVarID) { 2511 NameID = Lex.getUIntVal(); 2512 Lex.Lex(); 2513 if (ParseToken(lltok::equal, "expected '=' after instruction id")) 2514 return true; 2515 } else if (Lex.getKind() == lltok::LocalVar || 2516 // FIXME: REMOVE IN LLVM 3.0 2517 Lex.getKind() == lltok::StringConstant) { 2518 NameStr = Lex.getStrVal(); 2519 Lex.Lex(); 2520 if (ParseToken(lltok::equal, "expected '=' after instruction name")) 2521 return true; 2522 } 2523 2524 if (ParseInstruction(Inst, BB, PFS)) return true; 2525 2526 BB->getInstList().push_back(Inst); 2527 2528 // Set the name on the instruction. 2529 if (PFS.SetInstName(NameID, NameStr, NameLoc, Inst)) return true; 2530 } while (!isa<TerminatorInst>(Inst)); 2531 2532 return false; 2533} 2534 2535//===----------------------------------------------------------------------===// 2536// Instruction Parsing. 2537//===----------------------------------------------------------------------===// 2538 2539/// ParseInstruction - Parse one of the many different instructions. 2540/// 2541bool LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB, 2542 PerFunctionState &PFS) { 2543 lltok::Kind Token = Lex.getKind(); 2544 if (Token == lltok::Eof) 2545 return TokError("found end of file when expecting more instructions"); 2546 LocTy Loc = Lex.getLoc(); 2547 unsigned KeywordVal = Lex.getUIntVal(); 2548 Lex.Lex(); // Eat the keyword. 2549 2550 switch (Token) { 2551 default: return Error(Loc, "expected instruction opcode"); 2552 // Terminator Instructions. 2553 case lltok::kw_unwind: Inst = new UnwindInst(); return false; 2554 case lltok::kw_unreachable: Inst = new UnreachableInst(); return false; 2555 case lltok::kw_ret: return ParseRet(Inst, BB, PFS); 2556 case lltok::kw_br: return ParseBr(Inst, PFS); 2557 case lltok::kw_switch: return ParseSwitch(Inst, PFS); 2558 case lltok::kw_invoke: return ParseInvoke(Inst, PFS); 2559 // Binary Operators. 2560 case lltok::kw_add: 2561 case lltok::kw_sub: 2562 case lltok::kw_mul: { 2563 bool NUW = false; 2564 bool NSW = false; 2565 LocTy ModifierLoc = Lex.getLoc(); 2566 if (EatIfPresent(lltok::kw_nuw)) 2567 NUW = true; 2568 if (EatIfPresent(lltok::kw_nsw)) { 2569 NSW = true; 2570 if (EatIfPresent(lltok::kw_nuw)) 2571 NUW = true; 2572 } 2573 // API compatibility: Accept either integer or floating-point types. 2574 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 0); 2575 if (!Result) { 2576 if (!Inst->getType()->isIntOrIntVector()) { 2577 if (NUW) 2578 return Error(ModifierLoc, "nuw only applies to integer operations"); 2579 if (NSW) 2580 return Error(ModifierLoc, "nsw only applies to integer operations"); 2581 } 2582 if (NUW) 2583 cast<OverflowingBinaryOperator>(Inst)->setHasNoUnsignedOverflow(true); 2584 if (NSW) 2585 cast<OverflowingBinaryOperator>(Inst)->setHasNoSignedOverflow(true); 2586 } 2587 return Result; 2588 } 2589 case lltok::kw_fadd: 2590 case lltok::kw_fsub: 2591 case lltok::kw_fmul: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2592 2593 case lltok::kw_sdiv: { 2594 bool Exact = false; 2595 if (EatIfPresent(lltok::kw_exact)) 2596 Exact = true; 2597 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 1); 2598 if (!Result) 2599 if (Exact) 2600 cast<SDivOperator>(Inst)->setIsExact(true); 2601 return Result; 2602 } 2603 2604 case lltok::kw_udiv: 2605 case lltok::kw_urem: 2606 case lltok::kw_srem: return ParseArithmetic(Inst, PFS, KeywordVal, 1); 2607 case lltok::kw_fdiv: 2608 case lltok::kw_frem: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2609 case lltok::kw_shl: 2610 case lltok::kw_lshr: 2611 case lltok::kw_ashr: 2612 case lltok::kw_and: 2613 case lltok::kw_or: 2614 case lltok::kw_xor: return ParseLogical(Inst, PFS, KeywordVal); 2615 case lltok::kw_icmp: 2616 case lltok::kw_fcmp: return ParseCompare(Inst, PFS, KeywordVal); 2617 // Casts. 2618 case lltok::kw_trunc: 2619 case lltok::kw_zext: 2620 case lltok::kw_sext: 2621 case lltok::kw_fptrunc: 2622 case lltok::kw_fpext: 2623 case lltok::kw_bitcast: 2624 case lltok::kw_uitofp: 2625 case lltok::kw_sitofp: 2626 case lltok::kw_fptoui: 2627 case lltok::kw_fptosi: 2628 case lltok::kw_inttoptr: 2629 case lltok::kw_ptrtoint: return ParseCast(Inst, PFS, KeywordVal); 2630 // Other. 2631 case lltok::kw_select: return ParseSelect(Inst, PFS); 2632 case lltok::kw_va_arg: return ParseVA_Arg(Inst, PFS); 2633 case lltok::kw_extractelement: return ParseExtractElement(Inst, PFS); 2634 case lltok::kw_insertelement: return ParseInsertElement(Inst, PFS); 2635 case lltok::kw_shufflevector: return ParseShuffleVector(Inst, PFS); 2636 case lltok::kw_phi: return ParsePHI(Inst, PFS); 2637 case lltok::kw_call: return ParseCall(Inst, PFS, false); 2638 case lltok::kw_tail: return ParseCall(Inst, PFS, true); 2639 // Memory. 2640 case lltok::kw_alloca: 2641 case lltok::kw_malloc: return ParseAlloc(Inst, PFS, KeywordVal); 2642 case lltok::kw_free: return ParseFree(Inst, PFS); 2643 case lltok::kw_load: return ParseLoad(Inst, PFS, false); 2644 case lltok::kw_store: return ParseStore(Inst, PFS, false); 2645 case lltok::kw_volatile: 2646 if (EatIfPresent(lltok::kw_load)) 2647 return ParseLoad(Inst, PFS, true); 2648 else if (EatIfPresent(lltok::kw_store)) 2649 return ParseStore(Inst, PFS, true); 2650 else 2651 return TokError("expected 'load' or 'store'"); 2652 case lltok::kw_getresult: return ParseGetResult(Inst, PFS); 2653 case lltok::kw_getelementptr: return ParseGetElementPtr(Inst, PFS); 2654 case lltok::kw_extractvalue: return ParseExtractValue(Inst, PFS); 2655 case lltok::kw_insertvalue: return ParseInsertValue(Inst, PFS); 2656 } 2657} 2658 2659/// ParseCmpPredicate - Parse an integer or fp predicate, based on Kind. 2660bool LLParser::ParseCmpPredicate(unsigned &P, unsigned Opc) { 2661 if (Opc == Instruction::FCmp) { 2662 switch (Lex.getKind()) { 2663 default: TokError("expected fcmp predicate (e.g. 'oeq')"); 2664 case lltok::kw_oeq: P = CmpInst::FCMP_OEQ; break; 2665 case lltok::kw_one: P = CmpInst::FCMP_ONE; break; 2666 case lltok::kw_olt: P = CmpInst::FCMP_OLT; break; 2667 case lltok::kw_ogt: P = CmpInst::FCMP_OGT; break; 2668 case lltok::kw_ole: P = CmpInst::FCMP_OLE; break; 2669 case lltok::kw_oge: P = CmpInst::FCMP_OGE; break; 2670 case lltok::kw_ord: P = CmpInst::FCMP_ORD; break; 2671 case lltok::kw_uno: P = CmpInst::FCMP_UNO; break; 2672 case lltok::kw_ueq: P = CmpInst::FCMP_UEQ; break; 2673 case lltok::kw_une: P = CmpInst::FCMP_UNE; break; 2674 case lltok::kw_ult: P = CmpInst::FCMP_ULT; break; 2675 case lltok::kw_ugt: P = CmpInst::FCMP_UGT; break; 2676 case lltok::kw_ule: P = CmpInst::FCMP_ULE; break; 2677 case lltok::kw_uge: P = CmpInst::FCMP_UGE; break; 2678 case lltok::kw_true: P = CmpInst::FCMP_TRUE; break; 2679 case lltok::kw_false: P = CmpInst::FCMP_FALSE; break; 2680 } 2681 } else { 2682 switch (Lex.getKind()) { 2683 default: TokError("expected icmp predicate (e.g. 'eq')"); 2684 case lltok::kw_eq: P = CmpInst::ICMP_EQ; break; 2685 case lltok::kw_ne: P = CmpInst::ICMP_NE; break; 2686 case lltok::kw_slt: P = CmpInst::ICMP_SLT; break; 2687 case lltok::kw_sgt: P = CmpInst::ICMP_SGT; break; 2688 case lltok::kw_sle: P = CmpInst::ICMP_SLE; break; 2689 case lltok::kw_sge: P = CmpInst::ICMP_SGE; break; 2690 case lltok::kw_ult: P = CmpInst::ICMP_ULT; break; 2691 case lltok::kw_ugt: P = CmpInst::ICMP_UGT; break; 2692 case lltok::kw_ule: P = CmpInst::ICMP_ULE; break; 2693 case lltok::kw_uge: P = CmpInst::ICMP_UGE; break; 2694 } 2695 } 2696 Lex.Lex(); 2697 return false; 2698} 2699 2700//===----------------------------------------------------------------------===// 2701// Terminator Instructions. 2702//===----------------------------------------------------------------------===// 2703 2704/// ParseRet - Parse a return instruction. 2705/// ::= 'ret' void 2706/// ::= 'ret' TypeAndValue 2707/// ::= 'ret' TypeAndValue (',' TypeAndValue)+ [[obsolete: LLVM 3.0]] 2708bool LLParser::ParseRet(Instruction *&Inst, BasicBlock *BB, 2709 PerFunctionState &PFS) { 2710 PATypeHolder Ty(Type::VoidTy); 2711 if (ParseType(Ty, true /*void allowed*/)) return true; 2712 2713 if (Ty == Type::VoidTy) { 2714 Inst = ReturnInst::Create(); 2715 return false; 2716 } 2717 2718 Value *RV; 2719 if (ParseValue(Ty, RV, PFS)) return true; 2720 2721 // The normal case is one return value. 2722 if (Lex.getKind() == lltok::comma) { 2723 // FIXME: LLVM 3.0 remove MRV support for 'ret i32 1, i32 2', requiring use 2724 // of 'ret {i32,i32} {i32 1, i32 2}' 2725 SmallVector<Value*, 8> RVs; 2726 RVs.push_back(RV); 2727 2728 while (EatIfPresent(lltok::comma)) { 2729 if (ParseTypeAndValue(RV, PFS)) return true; 2730 RVs.push_back(RV); 2731 } 2732 2733 RV = Context.getUndef(PFS.getFunction().getReturnType()); 2734 for (unsigned i = 0, e = RVs.size(); i != e; ++i) { 2735 Instruction *I = InsertValueInst::Create(RV, RVs[i], i, "mrv"); 2736 BB->getInstList().push_back(I); 2737 RV = I; 2738 } 2739 } 2740 Inst = ReturnInst::Create(RV); 2741 return false; 2742} 2743 2744 2745/// ParseBr 2746/// ::= 'br' TypeAndValue 2747/// ::= 'br' TypeAndValue ',' TypeAndValue ',' TypeAndValue 2748bool LLParser::ParseBr(Instruction *&Inst, PerFunctionState &PFS) { 2749 LocTy Loc, Loc2; 2750 Value *Op0, *Op1, *Op2; 2751 if (ParseTypeAndValue(Op0, Loc, PFS)) return true; 2752 2753 if (BasicBlock *BB = dyn_cast<BasicBlock>(Op0)) { 2754 Inst = BranchInst::Create(BB); 2755 return false; 2756 } 2757 2758 if (Op0->getType() != Type::Int1Ty) 2759 return Error(Loc, "branch condition must have 'i1' type"); 2760 2761 if (ParseToken(lltok::comma, "expected ',' after branch condition") || 2762 ParseTypeAndValue(Op1, Loc, PFS) || 2763 ParseToken(lltok::comma, "expected ',' after true destination") || 2764 ParseTypeAndValue(Op2, Loc2, PFS)) 2765 return true; 2766 2767 if (!isa<BasicBlock>(Op1)) 2768 return Error(Loc, "true destination of branch must be a basic block"); 2769 if (!isa<BasicBlock>(Op2)) 2770 return Error(Loc2, "true destination of branch must be a basic block"); 2771 2772 Inst = BranchInst::Create(cast<BasicBlock>(Op1), cast<BasicBlock>(Op2), Op0); 2773 return false; 2774} 2775 2776/// ParseSwitch 2777/// Instruction 2778/// ::= 'switch' TypeAndValue ',' TypeAndValue '[' JumpTable ']' 2779/// JumpTable 2780/// ::= (TypeAndValue ',' TypeAndValue)* 2781bool LLParser::ParseSwitch(Instruction *&Inst, PerFunctionState &PFS) { 2782 LocTy CondLoc, BBLoc; 2783 Value *Cond, *DefaultBB; 2784 if (ParseTypeAndValue(Cond, CondLoc, PFS) || 2785 ParseToken(lltok::comma, "expected ',' after switch condition") || 2786 ParseTypeAndValue(DefaultBB, BBLoc, PFS) || 2787 ParseToken(lltok::lsquare, "expected '[' with switch table")) 2788 return true; 2789 2790 if (!isa<IntegerType>(Cond->getType())) 2791 return Error(CondLoc, "switch condition must have integer type"); 2792 if (!isa<BasicBlock>(DefaultBB)) 2793 return Error(BBLoc, "default destination must be a basic block"); 2794 2795 // Parse the jump table pairs. 2796 SmallPtrSet<Value*, 32> SeenCases; 2797 SmallVector<std::pair<ConstantInt*, BasicBlock*>, 32> Table; 2798 while (Lex.getKind() != lltok::rsquare) { 2799 Value *Constant, *DestBB; 2800 2801 if (ParseTypeAndValue(Constant, CondLoc, PFS) || 2802 ParseToken(lltok::comma, "expected ',' after case value") || 2803 ParseTypeAndValue(DestBB, BBLoc, PFS)) 2804 return true; 2805 2806 if (!SeenCases.insert(Constant)) 2807 return Error(CondLoc, "duplicate case value in switch"); 2808 if (!isa<ConstantInt>(Constant)) 2809 return Error(CondLoc, "case value is not a constant integer"); 2810 if (!isa<BasicBlock>(DestBB)) 2811 return Error(BBLoc, "case destination is not a basic block"); 2812 2813 Table.push_back(std::make_pair(cast<ConstantInt>(Constant), 2814 cast<BasicBlock>(DestBB))); 2815 } 2816 2817 Lex.Lex(); // Eat the ']'. 2818 2819 SwitchInst *SI = SwitchInst::Create(Cond, cast<BasicBlock>(DefaultBB), 2820 Table.size()); 2821 for (unsigned i = 0, e = Table.size(); i != e; ++i) 2822 SI->addCase(Table[i].first, Table[i].second); 2823 Inst = SI; 2824 return false; 2825} 2826 2827/// ParseInvoke 2828/// ::= 'invoke' OptionalCallingConv OptionalAttrs Type Value ParamList 2829/// OptionalAttrs 'to' TypeAndValue 'unwind' TypeAndValue 2830bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) { 2831 LocTy CallLoc = Lex.getLoc(); 2832 unsigned CC, RetAttrs, FnAttrs; 2833 PATypeHolder RetType(Type::VoidTy); 2834 LocTy RetTypeLoc; 2835 ValID CalleeID; 2836 SmallVector<ParamInfo, 16> ArgList; 2837 2838 Value *NormalBB, *UnwindBB; 2839 if (ParseOptionalCallingConv(CC) || 2840 ParseOptionalAttrs(RetAttrs, 1) || 2841 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 2842 ParseValID(CalleeID) || 2843 ParseParameterList(ArgList, PFS) || 2844 ParseOptionalAttrs(FnAttrs, 2) || 2845 ParseToken(lltok::kw_to, "expected 'to' in invoke") || 2846 ParseTypeAndValue(NormalBB, PFS) || 2847 ParseToken(lltok::kw_unwind, "expected 'unwind' in invoke") || 2848 ParseTypeAndValue(UnwindBB, PFS)) 2849 return true; 2850 2851 if (!isa<BasicBlock>(NormalBB)) 2852 return Error(CallLoc, "normal destination is not a basic block"); 2853 if (!isa<BasicBlock>(UnwindBB)) 2854 return Error(CallLoc, "unwind destination is not a basic block"); 2855 2856 // If RetType is a non-function pointer type, then this is the short syntax 2857 // for the call, which means that RetType is just the return type. Infer the 2858 // rest of the function argument types from the arguments that are present. 2859 const PointerType *PFTy = 0; 2860 const FunctionType *Ty = 0; 2861 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 2862 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 2863 // Pull out the types of all of the arguments... 2864 std::vector<const Type*> ParamTypes; 2865 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 2866 ParamTypes.push_back(ArgList[i].V->getType()); 2867 2868 if (!FunctionType::isValidReturnType(RetType)) 2869 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 2870 2871 Ty = Context.getFunctionType(RetType, ParamTypes, false); 2872 PFTy = Context.getPointerTypeUnqual(Ty); 2873 } 2874 2875 // Look up the callee. 2876 Value *Callee; 2877 if (ConvertValIDToValue(PFTy, CalleeID, Callee, PFS)) return true; 2878 2879 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 2880 // function attributes. 2881 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 2882 if (FnAttrs & ObsoleteFuncAttrs) { 2883 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 2884 FnAttrs &= ~ObsoleteFuncAttrs; 2885 } 2886 2887 // Set up the Attributes for the function. 2888 SmallVector<AttributeWithIndex, 8> Attrs; 2889 if (RetAttrs != Attribute::None) 2890 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 2891 2892 SmallVector<Value*, 8> Args; 2893 2894 // Loop through FunctionType's arguments and ensure they are specified 2895 // correctly. Also, gather any parameter attributes. 2896 FunctionType::param_iterator I = Ty->param_begin(); 2897 FunctionType::param_iterator E = Ty->param_end(); 2898 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 2899 const Type *ExpectedTy = 0; 2900 if (I != E) { 2901 ExpectedTy = *I++; 2902 } else if (!Ty->isVarArg()) { 2903 return Error(ArgList[i].Loc, "too many arguments specified"); 2904 } 2905 2906 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 2907 return Error(ArgList[i].Loc, "argument is not of expected type '" + 2908 ExpectedTy->getDescription() + "'"); 2909 Args.push_back(ArgList[i].V); 2910 if (ArgList[i].Attrs != Attribute::None) 2911 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 2912 } 2913 2914 if (I != E) 2915 return Error(CallLoc, "not enough parameters specified for call"); 2916 2917 if (FnAttrs != Attribute::None) 2918 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 2919 2920 // Finish off the Attributes and check them 2921 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 2922 2923 InvokeInst *II = InvokeInst::Create(Callee, cast<BasicBlock>(NormalBB), 2924 cast<BasicBlock>(UnwindBB), 2925 Args.begin(), Args.end()); 2926 II->setCallingConv(CC); 2927 II->setAttributes(PAL); 2928 Inst = II; 2929 return false; 2930} 2931 2932 2933 2934//===----------------------------------------------------------------------===// 2935// Binary Operators. 2936//===----------------------------------------------------------------------===// 2937 2938/// ParseArithmetic 2939/// ::= ArithmeticOps TypeAndValue ',' Value 2940/// 2941/// If OperandType is 0, then any FP or integer operand is allowed. If it is 1, 2942/// then any integer operand is allowed, if it is 2, any fp operand is allowed. 2943bool LLParser::ParseArithmetic(Instruction *&Inst, PerFunctionState &PFS, 2944 unsigned Opc, unsigned OperandType) { 2945 LocTy Loc; Value *LHS, *RHS; 2946 if (ParseTypeAndValue(LHS, Loc, PFS) || 2947 ParseToken(lltok::comma, "expected ',' in arithmetic operation") || 2948 ParseValue(LHS->getType(), RHS, PFS)) 2949 return true; 2950 2951 bool Valid; 2952 switch (OperandType) { 2953 default: llvm_unreachable("Unknown operand type!"); 2954 case 0: // int or FP. 2955 Valid = LHS->getType()->isIntOrIntVector() || 2956 LHS->getType()->isFPOrFPVector(); 2957 break; 2958 case 1: Valid = LHS->getType()->isIntOrIntVector(); break; 2959 case 2: Valid = LHS->getType()->isFPOrFPVector(); break; 2960 } 2961 2962 if (!Valid) 2963 return Error(Loc, "invalid operand type for instruction"); 2964 2965 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 2966 return false; 2967} 2968 2969/// ParseLogical 2970/// ::= ArithmeticOps TypeAndValue ',' Value { 2971bool LLParser::ParseLogical(Instruction *&Inst, PerFunctionState &PFS, 2972 unsigned Opc) { 2973 LocTy Loc; Value *LHS, *RHS; 2974 if (ParseTypeAndValue(LHS, Loc, PFS) || 2975 ParseToken(lltok::comma, "expected ',' in logical operation") || 2976 ParseValue(LHS->getType(), RHS, PFS)) 2977 return true; 2978 2979 if (!LHS->getType()->isIntOrIntVector()) 2980 return Error(Loc,"instruction requires integer or integer vector operands"); 2981 2982 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 2983 return false; 2984} 2985 2986 2987/// ParseCompare 2988/// ::= 'icmp' IPredicates TypeAndValue ',' Value 2989/// ::= 'fcmp' FPredicates TypeAndValue ',' Value 2990bool LLParser::ParseCompare(Instruction *&Inst, PerFunctionState &PFS, 2991 unsigned Opc) { 2992 // Parse the integer/fp comparison predicate. 2993 LocTy Loc; 2994 unsigned Pred; 2995 Value *LHS, *RHS; 2996 if (ParseCmpPredicate(Pred, Opc) || 2997 ParseTypeAndValue(LHS, Loc, PFS) || 2998 ParseToken(lltok::comma, "expected ',' after compare value") || 2999 ParseValue(LHS->getType(), RHS, PFS)) 3000 return true; 3001 3002 if (Opc == Instruction::FCmp) { 3003 if (!LHS->getType()->isFPOrFPVector()) 3004 return Error(Loc, "fcmp requires floating point operands"); 3005 Inst = new FCmpInst(Context, CmpInst::Predicate(Pred), LHS, RHS); 3006 } else { 3007 assert(Opc == Instruction::ICmp && "Unknown opcode for CmpInst!"); 3008 if (!LHS->getType()->isIntOrIntVector() && 3009 !isa<PointerType>(LHS->getType())) 3010 return Error(Loc, "icmp requires integer operands"); 3011 Inst = new ICmpInst(Context, CmpInst::Predicate(Pred), LHS, RHS); 3012 } 3013 return false; 3014} 3015 3016//===----------------------------------------------------------------------===// 3017// Other Instructions. 3018//===----------------------------------------------------------------------===// 3019 3020 3021/// ParseCast 3022/// ::= CastOpc TypeAndValue 'to' Type 3023bool LLParser::ParseCast(Instruction *&Inst, PerFunctionState &PFS, 3024 unsigned Opc) { 3025 LocTy Loc; Value *Op; 3026 PATypeHolder DestTy(Type::VoidTy); 3027 if (ParseTypeAndValue(Op, Loc, PFS) || 3028 ParseToken(lltok::kw_to, "expected 'to' after cast value") || 3029 ParseType(DestTy)) 3030 return true; 3031 3032 if (!CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy)) { 3033 CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy); 3034 return Error(Loc, "invalid cast opcode for cast from '" + 3035 Op->getType()->getDescription() + "' to '" + 3036 DestTy->getDescription() + "'"); 3037 } 3038 Inst = CastInst::Create((Instruction::CastOps)Opc, Op, DestTy); 3039 return false; 3040} 3041 3042/// ParseSelect 3043/// ::= 'select' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3044bool LLParser::ParseSelect(Instruction *&Inst, PerFunctionState &PFS) { 3045 LocTy Loc; 3046 Value *Op0, *Op1, *Op2; 3047 if (ParseTypeAndValue(Op0, Loc, PFS) || 3048 ParseToken(lltok::comma, "expected ',' after select condition") || 3049 ParseTypeAndValue(Op1, PFS) || 3050 ParseToken(lltok::comma, "expected ',' after select value") || 3051 ParseTypeAndValue(Op2, PFS)) 3052 return true; 3053 3054 if (const char *Reason = SelectInst::areInvalidOperands(Op0, Op1, Op2)) 3055 return Error(Loc, Reason); 3056 3057 Inst = SelectInst::Create(Op0, Op1, Op2); 3058 return false; 3059} 3060 3061/// ParseVA_Arg 3062/// ::= 'va_arg' TypeAndValue ',' Type 3063bool LLParser::ParseVA_Arg(Instruction *&Inst, PerFunctionState &PFS) { 3064 Value *Op; 3065 PATypeHolder EltTy(Type::VoidTy); 3066 LocTy TypeLoc; 3067 if (ParseTypeAndValue(Op, PFS) || 3068 ParseToken(lltok::comma, "expected ',' after vaarg operand") || 3069 ParseType(EltTy, TypeLoc)) 3070 return true; 3071 3072 if (!EltTy->isFirstClassType()) 3073 return Error(TypeLoc, "va_arg requires operand with first class type"); 3074 3075 Inst = new VAArgInst(Op, EltTy); 3076 return false; 3077} 3078 3079/// ParseExtractElement 3080/// ::= 'extractelement' TypeAndValue ',' TypeAndValue 3081bool LLParser::ParseExtractElement(Instruction *&Inst, PerFunctionState &PFS) { 3082 LocTy Loc; 3083 Value *Op0, *Op1; 3084 if (ParseTypeAndValue(Op0, Loc, PFS) || 3085 ParseToken(lltok::comma, "expected ',' after extract value") || 3086 ParseTypeAndValue(Op1, PFS)) 3087 return true; 3088 3089 if (!ExtractElementInst::isValidOperands(Op0, Op1)) 3090 return Error(Loc, "invalid extractelement operands"); 3091 3092 Inst = ExtractElementInst::Create(Op0, Op1); 3093 return false; 3094} 3095 3096/// ParseInsertElement 3097/// ::= 'insertelement' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3098bool LLParser::ParseInsertElement(Instruction *&Inst, PerFunctionState &PFS) { 3099 LocTy Loc; 3100 Value *Op0, *Op1, *Op2; 3101 if (ParseTypeAndValue(Op0, Loc, PFS) || 3102 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3103 ParseTypeAndValue(Op1, PFS) || 3104 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3105 ParseTypeAndValue(Op2, PFS)) 3106 return true; 3107 3108 if (!InsertElementInst::isValidOperands(Op0, Op1, Op2)) 3109 return Error(Loc, "invalid insertelement operands"); 3110 3111 Inst = InsertElementInst::Create(Op0, Op1, Op2); 3112 return false; 3113} 3114 3115/// ParseShuffleVector 3116/// ::= 'shufflevector' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3117bool LLParser::ParseShuffleVector(Instruction *&Inst, PerFunctionState &PFS) { 3118 LocTy Loc; 3119 Value *Op0, *Op1, *Op2; 3120 if (ParseTypeAndValue(Op0, Loc, PFS) || 3121 ParseToken(lltok::comma, "expected ',' after shuffle mask") || 3122 ParseTypeAndValue(Op1, PFS) || 3123 ParseToken(lltok::comma, "expected ',' after shuffle value") || 3124 ParseTypeAndValue(Op2, PFS)) 3125 return true; 3126 3127 if (!ShuffleVectorInst::isValidOperands(Op0, Op1, Op2)) 3128 return Error(Loc, "invalid extractelement operands"); 3129 3130 Inst = new ShuffleVectorInst(Op0, Op1, Op2); 3131 return false; 3132} 3133 3134/// ParsePHI 3135/// ::= 'phi' Type '[' Value ',' Value ']' (',' '[' Value ',' Valueß ']')* 3136bool LLParser::ParsePHI(Instruction *&Inst, PerFunctionState &PFS) { 3137 PATypeHolder Ty(Type::VoidTy); 3138 Value *Op0, *Op1; 3139 LocTy TypeLoc = Lex.getLoc(); 3140 3141 if (ParseType(Ty) || 3142 ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3143 ParseValue(Ty, Op0, PFS) || 3144 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3145 ParseValue(Type::LabelTy, Op1, PFS) || 3146 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3147 return true; 3148 3149 SmallVector<std::pair<Value*, BasicBlock*>, 16> PHIVals; 3150 while (1) { 3151 PHIVals.push_back(std::make_pair(Op0, cast<BasicBlock>(Op1))); 3152 3153 if (!EatIfPresent(lltok::comma)) 3154 break; 3155 3156 if (ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3157 ParseValue(Ty, Op0, PFS) || 3158 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3159 ParseValue(Type::LabelTy, Op1, PFS) || 3160 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3161 return true; 3162 } 3163 3164 if (!Ty->isFirstClassType()) 3165 return Error(TypeLoc, "phi node must have first class type"); 3166 3167 PHINode *PN = PHINode::Create(Ty); 3168 PN->reserveOperandSpace(PHIVals.size()); 3169 for (unsigned i = 0, e = PHIVals.size(); i != e; ++i) 3170 PN->addIncoming(PHIVals[i].first, PHIVals[i].second); 3171 Inst = PN; 3172 return false; 3173} 3174 3175/// ParseCall 3176/// ::= 'tail'? 'call' OptionalCallingConv OptionalAttrs Type Value 3177/// ParameterList OptionalAttrs 3178bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS, 3179 bool isTail) { 3180 unsigned CC, RetAttrs, FnAttrs; 3181 PATypeHolder RetType(Type::VoidTy); 3182 LocTy RetTypeLoc; 3183 ValID CalleeID; 3184 SmallVector<ParamInfo, 16> ArgList; 3185 LocTy CallLoc = Lex.getLoc(); 3186 3187 if ((isTail && ParseToken(lltok::kw_call, "expected 'tail call'")) || 3188 ParseOptionalCallingConv(CC) || 3189 ParseOptionalAttrs(RetAttrs, 1) || 3190 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3191 ParseValID(CalleeID) || 3192 ParseParameterList(ArgList, PFS) || 3193 ParseOptionalAttrs(FnAttrs, 2)) 3194 return true; 3195 3196 // If RetType is a non-function pointer type, then this is the short syntax 3197 // for the call, which means that RetType is just the return type. Infer the 3198 // rest of the function argument types from the arguments that are present. 3199 const PointerType *PFTy = 0; 3200 const FunctionType *Ty = 0; 3201 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3202 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3203 // Pull out the types of all of the arguments... 3204 std::vector<const Type*> ParamTypes; 3205 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3206 ParamTypes.push_back(ArgList[i].V->getType()); 3207 3208 if (!FunctionType::isValidReturnType(RetType)) 3209 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3210 3211 Ty = Context.getFunctionType(RetType, ParamTypes, false); 3212 PFTy = Context.getPointerTypeUnqual(Ty); 3213 } 3214 3215 // Look up the callee. 3216 Value *Callee; 3217 if (ConvertValIDToValue(PFTy, CalleeID, Callee, PFS)) return true; 3218 3219 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 3220 // function attributes. 3221 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 3222 if (FnAttrs & ObsoleteFuncAttrs) { 3223 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 3224 FnAttrs &= ~ObsoleteFuncAttrs; 3225 } 3226 3227 // Set up the Attributes for the function. 3228 SmallVector<AttributeWithIndex, 8> Attrs; 3229 if (RetAttrs != Attribute::None) 3230 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3231 3232 SmallVector<Value*, 8> Args; 3233 3234 // Loop through FunctionType's arguments and ensure they are specified 3235 // correctly. Also, gather any parameter attributes. 3236 FunctionType::param_iterator I = Ty->param_begin(); 3237 FunctionType::param_iterator E = Ty->param_end(); 3238 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3239 const Type *ExpectedTy = 0; 3240 if (I != E) { 3241 ExpectedTy = *I++; 3242 } else if (!Ty->isVarArg()) { 3243 return Error(ArgList[i].Loc, "too many arguments specified"); 3244 } 3245 3246 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3247 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3248 ExpectedTy->getDescription() + "'"); 3249 Args.push_back(ArgList[i].V); 3250 if (ArgList[i].Attrs != Attribute::None) 3251 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3252 } 3253 3254 if (I != E) 3255 return Error(CallLoc, "not enough parameters specified for call"); 3256 3257 if (FnAttrs != Attribute::None) 3258 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3259 3260 // Finish off the Attributes and check them 3261 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3262 3263 CallInst *CI = CallInst::Create(Callee, Args.begin(), Args.end()); 3264 CI->setTailCall(isTail); 3265 CI->setCallingConv(CC); 3266 CI->setAttributes(PAL); 3267 Inst = CI; 3268 return false; 3269} 3270 3271//===----------------------------------------------------------------------===// 3272// Memory Instructions. 3273//===----------------------------------------------------------------------===// 3274 3275/// ParseAlloc 3276/// ::= 'malloc' Type (',' TypeAndValue)? (',' OptionalAlignment)? 3277/// ::= 'alloca' Type (',' TypeAndValue)? (',' OptionalAlignment)? 3278bool LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS, 3279 unsigned Opc) { 3280 PATypeHolder Ty(Type::VoidTy); 3281 Value *Size = 0; 3282 LocTy SizeLoc; 3283 unsigned Alignment = 0; 3284 if (ParseType(Ty)) return true; 3285 3286 if (EatIfPresent(lltok::comma)) { 3287 if (Lex.getKind() == lltok::kw_align) { 3288 if (ParseOptionalAlignment(Alignment)) return true; 3289 } else if (ParseTypeAndValue(Size, SizeLoc, PFS) || 3290 ParseOptionalCommaAlignment(Alignment)) { 3291 return true; 3292 } 3293 } 3294 3295 if (Size && Size->getType() != Type::Int32Ty) 3296 return Error(SizeLoc, "element count must be i32"); 3297 3298 if (Opc == Instruction::Malloc) 3299 Inst = new MallocInst(Ty, Size, Alignment); 3300 else 3301 Inst = new AllocaInst(Ty, Size, Alignment); 3302 return false; 3303} 3304 3305/// ParseFree 3306/// ::= 'free' TypeAndValue 3307bool LLParser::ParseFree(Instruction *&Inst, PerFunctionState &PFS) { 3308 Value *Val; LocTy Loc; 3309 if (ParseTypeAndValue(Val, Loc, PFS)) return true; 3310 if (!isa<PointerType>(Val->getType())) 3311 return Error(Loc, "operand to free must be a pointer"); 3312 Inst = new FreeInst(Val); 3313 return false; 3314} 3315 3316/// ParseLoad 3317/// ::= 'volatile'? 'load' TypeAndValue (',' 'align' i32)? 3318bool LLParser::ParseLoad(Instruction *&Inst, PerFunctionState &PFS, 3319 bool isVolatile) { 3320 Value *Val; LocTy Loc; 3321 unsigned Alignment; 3322 if (ParseTypeAndValue(Val, Loc, PFS) || 3323 ParseOptionalCommaAlignment(Alignment)) 3324 return true; 3325 3326 if (!isa<PointerType>(Val->getType()) || 3327 !cast<PointerType>(Val->getType())->getElementType()->isFirstClassType()) 3328 return Error(Loc, "load operand must be a pointer to a first class type"); 3329 3330 Inst = new LoadInst(Val, "", isVolatile, Alignment); 3331 return false; 3332} 3333 3334/// ParseStore 3335/// ::= 'volatile'? 'store' TypeAndValue ',' TypeAndValue (',' 'align' i32)? 3336bool LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS, 3337 bool isVolatile) { 3338 Value *Val, *Ptr; LocTy Loc, PtrLoc; 3339 unsigned Alignment; 3340 if (ParseTypeAndValue(Val, Loc, PFS) || 3341 ParseToken(lltok::comma, "expected ',' after store operand") || 3342 ParseTypeAndValue(Ptr, PtrLoc, PFS) || 3343 ParseOptionalCommaAlignment(Alignment)) 3344 return true; 3345 3346 if (!isa<PointerType>(Ptr->getType())) 3347 return Error(PtrLoc, "store operand must be a pointer"); 3348 if (!Val->getType()->isFirstClassType()) 3349 return Error(Loc, "store operand must be a first class value"); 3350 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType()) 3351 return Error(Loc, "stored value and pointer type do not match"); 3352 3353 Inst = new StoreInst(Val, Ptr, isVolatile, Alignment); 3354 return false; 3355} 3356 3357/// ParseGetResult 3358/// ::= 'getresult' TypeAndValue ',' i32 3359/// FIXME: Remove support for getresult in LLVM 3.0 3360bool LLParser::ParseGetResult(Instruction *&Inst, PerFunctionState &PFS) { 3361 Value *Val; LocTy ValLoc, EltLoc; 3362 unsigned Element; 3363 if (ParseTypeAndValue(Val, ValLoc, PFS) || 3364 ParseToken(lltok::comma, "expected ',' after getresult operand") || 3365 ParseUInt32(Element, EltLoc)) 3366 return true; 3367 3368 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 3369 return Error(ValLoc, "getresult inst requires an aggregate operand"); 3370 if (!ExtractValueInst::getIndexedType(Val->getType(), Element)) 3371 return Error(EltLoc, "invalid getresult index for value"); 3372 Inst = ExtractValueInst::Create(Val, Element); 3373 return false; 3374} 3375 3376/// ParseGetElementPtr 3377/// ::= 'getelementptr' 'inbounds'? TypeAndValue (',' TypeAndValue)* 3378bool LLParser::ParseGetElementPtr(Instruction *&Inst, PerFunctionState &PFS) { 3379 Value *Ptr, *Val; LocTy Loc, EltLoc; 3380 bool InBounds = false; 3381 3382 if (EatIfPresent(lltok::kw_inbounds)) 3383 InBounds = true; 3384 3385 if (ParseTypeAndValue(Ptr, Loc, PFS)) return true; 3386 3387 if (!isa<PointerType>(Ptr->getType())) 3388 return Error(Loc, "base of getelementptr must be a pointer"); 3389 3390 SmallVector<Value*, 16> Indices; 3391 while (EatIfPresent(lltok::comma)) { 3392 if (ParseTypeAndValue(Val, EltLoc, PFS)) return true; 3393 if (!isa<IntegerType>(Val->getType())) 3394 return Error(EltLoc, "getelementptr index must be an integer"); 3395 Indices.push_back(Val); 3396 } 3397 3398 if (!GetElementPtrInst::getIndexedType(Ptr->getType(), 3399 Indices.begin(), Indices.end())) 3400 return Error(Loc, "invalid getelementptr indices"); 3401 Inst = GetElementPtrInst::Create(Ptr, Indices.begin(), Indices.end()); 3402 if (InBounds) 3403 cast<GEPOperator>(Inst)->setIsInBounds(true); 3404 return false; 3405} 3406 3407/// ParseExtractValue 3408/// ::= 'extractvalue' TypeAndValue (',' uint32)+ 3409bool LLParser::ParseExtractValue(Instruction *&Inst, PerFunctionState &PFS) { 3410 Value *Val; LocTy Loc; 3411 SmallVector<unsigned, 4> Indices; 3412 if (ParseTypeAndValue(Val, Loc, PFS) || 3413 ParseIndexList(Indices)) 3414 return true; 3415 3416 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 3417 return Error(Loc, "extractvalue operand must be array or struct"); 3418 3419 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 3420 Indices.end())) 3421 return Error(Loc, "invalid indices for extractvalue"); 3422 Inst = ExtractValueInst::Create(Val, Indices.begin(), Indices.end()); 3423 return false; 3424} 3425 3426/// ParseInsertValue 3427/// ::= 'insertvalue' TypeAndValue ',' TypeAndValue (',' uint32)+ 3428bool LLParser::ParseInsertValue(Instruction *&Inst, PerFunctionState &PFS) { 3429 Value *Val0, *Val1; LocTy Loc0, Loc1; 3430 SmallVector<unsigned, 4> Indices; 3431 if (ParseTypeAndValue(Val0, Loc0, PFS) || 3432 ParseToken(lltok::comma, "expected comma after insertvalue operand") || 3433 ParseTypeAndValue(Val1, Loc1, PFS) || 3434 ParseIndexList(Indices)) 3435 return true; 3436 3437 if (!isa<StructType>(Val0->getType()) && !isa<ArrayType>(Val0->getType())) 3438 return Error(Loc0, "extractvalue operand must be array or struct"); 3439 3440 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 3441 Indices.end())) 3442 return Error(Loc0, "invalid indices for insertvalue"); 3443 Inst = InsertValueInst::Create(Val0, Val1, Indices.begin(), Indices.end()); 3444 return false; 3445} 3446 3447//===----------------------------------------------------------------------===// 3448// Embedded metadata. 3449//===----------------------------------------------------------------------===// 3450 3451/// ParseMDNodeVector 3452/// ::= Element (',' Element)* 3453/// Element 3454/// ::= 'null' | TypeAndValue 3455bool LLParser::ParseMDNodeVector(SmallVectorImpl<Value*> &Elts) { 3456 assert(Lex.getKind() == lltok::lbrace); 3457 Lex.Lex(); 3458 do { 3459 Value *V = 0; 3460 if (Lex.getKind() == lltok::kw_null) { 3461 Lex.Lex(); 3462 V = 0; 3463 } else { 3464 PATypeHolder Ty(Type::VoidTy); 3465 if (ParseType(Ty)) return true; 3466 if (Lex.getKind() == lltok::Metadata) { 3467 Lex.Lex(); 3468 MetadataBase *Node = 0; 3469 if (!ParseMDNode(Node)) 3470 V = Node; 3471 else { 3472 MetadataBase *MDS = 0; 3473 if (ParseMDString(MDS)) return true; 3474 V = MDS; 3475 } 3476 } else { 3477 Constant *C; 3478 if (ParseGlobalValue(Ty, C)) return true; 3479 V = C; 3480 } 3481 } 3482 Elts.push_back(V); 3483 } while (EatIfPresent(lltok::comma)); 3484 3485 return false; 3486} 3487