LLParser.cpp revision 96b930ddc7f0df9e278a5cb65ad77a559a20964e
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/Metadata.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 // Update auto-upgraded malloc calls from "autoupgrade_malloc" to "malloc". 73 if (MallocF) { 74 MallocF->setName("malloc"); 75 // If setName() does not set the name to "malloc", then there is already a 76 // declaration of "malloc". In that case, iterate over all calls to MallocF 77 // and get them to call the declared "malloc" instead. 78 if (MallocF->getName() != "malloc") { 79 Function* realMallocF = M->getFunction("malloc"); 80 for (User::use_iterator UI = MallocF->use_begin(), UE= MallocF->use_end(); 81 UI != UE; ) { 82 User* user = *UI; 83 UI++; 84 if (CallInst *Call = dyn_cast<CallInst>(user)) 85 Call->setCalledFunction(realMallocF); 86 } 87 if (!realMallocF->doesNotAlias(0)) realMallocF->setDoesNotAlias(0); 88 MallocF->eraseFromParent(); 89 MallocF = NULL; 90 } 91 } 92 93 if (!ForwardRefTypes.empty()) 94 return Error(ForwardRefTypes.begin()->second.second, 95 "use of undefined type named '" + 96 ForwardRefTypes.begin()->first + "'"); 97 if (!ForwardRefTypeIDs.empty()) 98 return Error(ForwardRefTypeIDs.begin()->second.second, 99 "use of undefined type '%" + 100 utostr(ForwardRefTypeIDs.begin()->first) + "'"); 101 102 if (!ForwardRefVals.empty()) 103 return Error(ForwardRefVals.begin()->second.second, 104 "use of undefined value '@" + ForwardRefVals.begin()->first + 105 "'"); 106 107 if (!ForwardRefValIDs.empty()) 108 return Error(ForwardRefValIDs.begin()->second.second, 109 "use of undefined value '@" + 110 utostr(ForwardRefValIDs.begin()->first) + "'"); 111 112 if (!ForwardRefMDNodes.empty()) 113 return Error(ForwardRefMDNodes.begin()->second.second, 114 "use of undefined metadata '!" + 115 utostr(ForwardRefMDNodes.begin()->first) + "'"); 116 117 118 // Look for intrinsic functions and CallInst that need to be upgraded 119 for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ) 120 UpgradeCallsToIntrinsic(FI++); // must be post-increment, as we remove 121 122 // Check debug info intrinsics. 123 CheckDebugInfoIntrinsics(M); 124 return false; 125} 126 127//===----------------------------------------------------------------------===// 128// Top-Level Entities 129//===----------------------------------------------------------------------===// 130 131bool LLParser::ParseTopLevelEntities() { 132 while (1) { 133 switch (Lex.getKind()) { 134 default: return TokError("expected top-level entity"); 135 case lltok::Eof: return false; 136 //case lltok::kw_define: 137 case lltok::kw_declare: if (ParseDeclare()) return true; break; 138 case lltok::kw_define: if (ParseDefine()) return true; break; 139 case lltok::kw_module: if (ParseModuleAsm()) return true; break; 140 case lltok::kw_target: if (ParseTargetDefinition()) return true; break; 141 case lltok::kw_deplibs: if (ParseDepLibs()) return true; break; 142 case lltok::kw_type: if (ParseUnnamedType()) return true; break; 143 case lltok::LocalVarID: if (ParseUnnamedType()) return true; break; 144 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0 145 case lltok::LocalVar: if (ParseNamedType()) return true; break; 146 case lltok::GlobalID: if (ParseUnnamedGlobal()) return true; break; 147 case lltok::GlobalVar: if (ParseNamedGlobal()) return true; break; 148 case lltok::Metadata: if (ParseStandaloneMetadata()) return true; break; 149 case lltok::NamedMD: if (ParseNamedMetadata()) return true; break; 150 151 // The Global variable production with no name can have many different 152 // optional leading prefixes, the production is: 153 // GlobalVar ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 154 // OptionalAddrSpace ('constant'|'global') ... 155 case lltok::kw_private : // OptionalLinkage 156 case lltok::kw_linker_private: // OptionalLinkage 157 case lltok::kw_internal: // OptionalLinkage 158 case lltok::kw_weak: // OptionalLinkage 159 case lltok::kw_weak_odr: // OptionalLinkage 160 case lltok::kw_linkonce: // OptionalLinkage 161 case lltok::kw_linkonce_odr: // OptionalLinkage 162 case lltok::kw_appending: // OptionalLinkage 163 case lltok::kw_dllexport: // OptionalLinkage 164 case lltok::kw_common: // OptionalLinkage 165 case lltok::kw_dllimport: // OptionalLinkage 166 case lltok::kw_extern_weak: // OptionalLinkage 167 case lltok::kw_external: { // OptionalLinkage 168 unsigned Linkage, Visibility; 169 if (ParseOptionalLinkage(Linkage) || 170 ParseOptionalVisibility(Visibility) || 171 ParseGlobal("", SMLoc(), Linkage, true, Visibility)) 172 return true; 173 break; 174 } 175 case lltok::kw_default: // OptionalVisibility 176 case lltok::kw_hidden: // OptionalVisibility 177 case lltok::kw_protected: { // OptionalVisibility 178 unsigned Visibility; 179 if (ParseOptionalVisibility(Visibility) || 180 ParseGlobal("", SMLoc(), 0, false, Visibility)) 181 return true; 182 break; 183 } 184 185 case lltok::kw_thread_local: // OptionalThreadLocal 186 case lltok::kw_addrspace: // OptionalAddrSpace 187 case lltok::kw_constant: // GlobalType 188 case lltok::kw_global: // GlobalType 189 if (ParseGlobal("", SMLoc(), 0, false, 0)) return true; 190 break; 191 } 192 } 193} 194 195 196/// toplevelentity 197/// ::= 'module' 'asm' STRINGCONSTANT 198bool LLParser::ParseModuleAsm() { 199 assert(Lex.getKind() == lltok::kw_module); 200 Lex.Lex(); 201 202 std::string AsmStr; 203 if (ParseToken(lltok::kw_asm, "expected 'module asm'") || 204 ParseStringConstant(AsmStr)) return true; 205 206 const std::string &AsmSoFar = M->getModuleInlineAsm(); 207 if (AsmSoFar.empty()) 208 M->setModuleInlineAsm(AsmStr); 209 else 210 M->setModuleInlineAsm(AsmSoFar+"\n"+AsmStr); 211 return false; 212} 213 214/// toplevelentity 215/// ::= 'target' 'triple' '=' STRINGCONSTANT 216/// ::= 'target' 'datalayout' '=' STRINGCONSTANT 217bool LLParser::ParseTargetDefinition() { 218 assert(Lex.getKind() == lltok::kw_target); 219 std::string Str; 220 switch (Lex.Lex()) { 221 default: return TokError("unknown target property"); 222 case lltok::kw_triple: 223 Lex.Lex(); 224 if (ParseToken(lltok::equal, "expected '=' after target triple") || 225 ParseStringConstant(Str)) 226 return true; 227 M->setTargetTriple(Str); 228 return false; 229 case lltok::kw_datalayout: 230 Lex.Lex(); 231 if (ParseToken(lltok::equal, "expected '=' after target datalayout") || 232 ParseStringConstant(Str)) 233 return true; 234 M->setDataLayout(Str); 235 return false; 236 } 237} 238 239/// toplevelentity 240/// ::= 'deplibs' '=' '[' ']' 241/// ::= 'deplibs' '=' '[' STRINGCONSTANT (',' STRINGCONSTANT)* ']' 242bool LLParser::ParseDepLibs() { 243 assert(Lex.getKind() == lltok::kw_deplibs); 244 Lex.Lex(); 245 if (ParseToken(lltok::equal, "expected '=' after deplibs") || 246 ParseToken(lltok::lsquare, "expected '=' after deplibs")) 247 return true; 248 249 if (EatIfPresent(lltok::rsquare)) 250 return false; 251 252 std::string Str; 253 if (ParseStringConstant(Str)) return true; 254 M->addLibrary(Str); 255 256 while (EatIfPresent(lltok::comma)) { 257 if (ParseStringConstant(Str)) return true; 258 M->addLibrary(Str); 259 } 260 261 return ParseToken(lltok::rsquare, "expected ']' at end of list"); 262} 263 264/// ParseUnnamedType: 265/// ::= 'type' type 266/// ::= LocalVarID '=' 'type' type 267bool LLParser::ParseUnnamedType() { 268 unsigned TypeID = NumberedTypes.size(); 269 270 // Handle the LocalVarID form. 271 if (Lex.getKind() == lltok::LocalVarID) { 272 if (Lex.getUIntVal() != TypeID) 273 return Error(Lex.getLoc(), "type expected to be numbered '%" + 274 utostr(TypeID) + "'"); 275 Lex.Lex(); // eat LocalVarID; 276 277 if (ParseToken(lltok::equal, "expected '=' after name")) 278 return true; 279 } 280 281 assert(Lex.getKind() == lltok::kw_type); 282 LocTy TypeLoc = Lex.getLoc(); 283 Lex.Lex(); // eat kw_type 284 285 PATypeHolder Ty(Type::getVoidTy(Context)); 286 if (ParseType(Ty)) return true; 287 288 // See if this type was previously referenced. 289 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 290 FI = ForwardRefTypeIDs.find(TypeID); 291 if (FI != ForwardRefTypeIDs.end()) { 292 if (FI->second.first.get() == Ty) 293 return Error(TypeLoc, "self referential type is invalid"); 294 295 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 296 Ty = FI->second.first.get(); 297 ForwardRefTypeIDs.erase(FI); 298 } 299 300 NumberedTypes.push_back(Ty); 301 302 return false; 303} 304 305/// toplevelentity 306/// ::= LocalVar '=' 'type' type 307bool LLParser::ParseNamedType() { 308 std::string Name = Lex.getStrVal(); 309 LocTy NameLoc = Lex.getLoc(); 310 Lex.Lex(); // eat LocalVar. 311 312 PATypeHolder Ty(Type::getVoidTy(Context)); 313 314 if (ParseToken(lltok::equal, "expected '=' after name") || 315 ParseToken(lltok::kw_type, "expected 'type' after name") || 316 ParseType(Ty)) 317 return true; 318 319 // Set the type name, checking for conflicts as we do so. 320 bool AlreadyExists = M->addTypeName(Name, Ty); 321 if (!AlreadyExists) return false; 322 323 // See if this type is a forward reference. We need to eagerly resolve 324 // types to allow recursive type redefinitions below. 325 std::map<std::string, std::pair<PATypeHolder, LocTy> >::iterator 326 FI = ForwardRefTypes.find(Name); 327 if (FI != ForwardRefTypes.end()) { 328 if (FI->second.first.get() == Ty) 329 return Error(NameLoc, "self referential type is invalid"); 330 331 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 332 Ty = FI->second.first.get(); 333 ForwardRefTypes.erase(FI); 334 } 335 336 // Inserting a name that is already defined, get the existing name. 337 const Type *Existing = M->getTypeByName(Name); 338 assert(Existing && "Conflict but no matching type?!"); 339 340 // Otherwise, this is an attempt to redefine a type. That's okay if 341 // the redefinition is identical to the original. 342 // FIXME: REMOVE REDEFINITIONS IN LLVM 3.0 343 if (Existing == Ty) return false; 344 345 // Any other kind of (non-equivalent) redefinition is an error. 346 return Error(NameLoc, "redefinition of type named '" + Name + "' of type '" + 347 Ty->getDescription() + "'"); 348} 349 350 351/// toplevelentity 352/// ::= 'declare' FunctionHeader 353bool LLParser::ParseDeclare() { 354 assert(Lex.getKind() == lltok::kw_declare); 355 Lex.Lex(); 356 357 Function *F; 358 return ParseFunctionHeader(F, false); 359} 360 361/// toplevelentity 362/// ::= 'define' FunctionHeader '{' ... 363bool LLParser::ParseDefine() { 364 assert(Lex.getKind() == lltok::kw_define); 365 Lex.Lex(); 366 367 Function *F; 368 return ParseFunctionHeader(F, true) || 369 ParseFunctionBody(*F); 370} 371 372/// ParseGlobalType 373/// ::= 'constant' 374/// ::= 'global' 375bool LLParser::ParseGlobalType(bool &IsConstant) { 376 if (Lex.getKind() == lltok::kw_constant) 377 IsConstant = true; 378 else if (Lex.getKind() == lltok::kw_global) 379 IsConstant = false; 380 else { 381 IsConstant = false; 382 return TokError("expected 'global' or 'constant'"); 383 } 384 Lex.Lex(); 385 return false; 386} 387 388/// ParseUnnamedGlobal: 389/// OptionalVisibility ALIAS ... 390/// OptionalLinkage OptionalVisibility ... -> global variable 391/// GlobalID '=' OptionalVisibility ALIAS ... 392/// GlobalID '=' OptionalLinkage OptionalVisibility ... -> global variable 393bool LLParser::ParseUnnamedGlobal() { 394 unsigned VarID = NumberedVals.size(); 395 std::string Name; 396 LocTy NameLoc = Lex.getLoc(); 397 398 // Handle the GlobalID form. 399 if (Lex.getKind() == lltok::GlobalID) { 400 if (Lex.getUIntVal() != VarID) 401 return Error(Lex.getLoc(), "variable expected to be numbered '%" + 402 utostr(VarID) + "'"); 403 Lex.Lex(); // eat GlobalID; 404 405 if (ParseToken(lltok::equal, "expected '=' after name")) 406 return true; 407 } 408 409 bool HasLinkage; 410 unsigned Linkage, Visibility; 411 if (ParseOptionalLinkage(Linkage, HasLinkage) || 412 ParseOptionalVisibility(Visibility)) 413 return true; 414 415 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 416 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 417 return ParseAlias(Name, NameLoc, Visibility); 418} 419 420/// ParseNamedGlobal: 421/// GlobalVar '=' OptionalVisibility ALIAS ... 422/// GlobalVar '=' OptionalLinkage OptionalVisibility ... -> global variable 423bool LLParser::ParseNamedGlobal() { 424 assert(Lex.getKind() == lltok::GlobalVar); 425 LocTy NameLoc = Lex.getLoc(); 426 std::string Name = Lex.getStrVal(); 427 Lex.Lex(); 428 429 bool HasLinkage; 430 unsigned Linkage, Visibility; 431 if (ParseToken(lltok::equal, "expected '=' in global variable") || 432 ParseOptionalLinkage(Linkage, HasLinkage) || 433 ParseOptionalVisibility(Visibility)) 434 return true; 435 436 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 437 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 438 return ParseAlias(Name, NameLoc, Visibility); 439} 440 441// MDString: 442// ::= '!' STRINGCONSTANT 443bool LLParser::ParseMDString(MetadataBase *&MDS) { 444 std::string Str; 445 if (ParseStringConstant(Str)) return true; 446 MDS = MDString::get(Context, Str); 447 return false; 448} 449 450// MDNode: 451// ::= '!' MDNodeNumber 452bool LLParser::ParseMDNode(MetadataBase *&Node) { 453 // !{ ..., !42, ... } 454 unsigned MID = 0; 455 if (ParseUInt32(MID)) return true; 456 457 // Check existing MDNode. 458 std::map<unsigned, MetadataBase *>::iterator I = MetadataCache.find(MID); 459 if (I != MetadataCache.end()) { 460 Node = I->second; 461 return false; 462 } 463 464 // Check known forward references. 465 std::map<unsigned, std::pair<MetadataBase *, LocTy> >::iterator 466 FI = ForwardRefMDNodes.find(MID); 467 if (FI != ForwardRefMDNodes.end()) { 468 Node = FI->second.first; 469 return false; 470 } 471 472 // Create MDNode forward reference 473 SmallVector<Value *, 1> Elts; 474 std::string FwdRefName = "llvm.mdnode.fwdref." + utostr(MID); 475 Elts.push_back(MDString::get(Context, FwdRefName)); 476 MDNode *FwdNode = MDNode::get(Context, Elts.data(), Elts.size()); 477 ForwardRefMDNodes[MID] = std::make_pair(FwdNode, Lex.getLoc()); 478 Node = FwdNode; 479 return false; 480} 481 482///ParseNamedMetadata: 483/// !foo = !{ !1, !2 } 484bool LLParser::ParseNamedMetadata() { 485 assert(Lex.getKind() == lltok::NamedMD); 486 Lex.Lex(); 487 std::string Name = Lex.getStrVal(); 488 489 if (ParseToken(lltok::equal, "expected '=' here")) 490 return true; 491 492 if (Lex.getKind() != lltok::Metadata) 493 return TokError("Expected '!' here"); 494 Lex.Lex(); 495 496 if (Lex.getKind() != lltok::lbrace) 497 return TokError("Expected '{' here"); 498 Lex.Lex(); 499 SmallVector<MetadataBase *, 8> Elts; 500 do { 501 if (Lex.getKind() != lltok::Metadata) 502 return TokError("Expected '!' here"); 503 Lex.Lex(); 504 MetadataBase *N = 0; 505 if (ParseMDNode(N)) return true; 506 Elts.push_back(N); 507 } while (EatIfPresent(lltok::comma)); 508 509 if (ParseToken(lltok::rbrace, "expected end of metadata node")) 510 return true; 511 512 NamedMDNode::Create(Context, Name, Elts.data(), Elts.size(), M); 513 return false; 514} 515 516/// ParseStandaloneMetadata: 517/// !42 = !{...} 518bool LLParser::ParseStandaloneMetadata() { 519 assert(Lex.getKind() == lltok::Metadata); 520 Lex.Lex(); 521 unsigned MetadataID = 0; 522 if (ParseUInt32(MetadataID)) 523 return true; 524 if (MetadataCache.find(MetadataID) != MetadataCache.end()) 525 return TokError("Metadata id is already used"); 526 if (ParseToken(lltok::equal, "expected '=' here")) 527 return true; 528 529 LocTy TyLoc; 530 PATypeHolder Ty(Type::getVoidTy(Context)); 531 if (ParseType(Ty, TyLoc)) 532 return true; 533 534 if (Lex.getKind() != lltok::Metadata) 535 return TokError("Expected metadata here"); 536 537 Lex.Lex(); 538 if (Lex.getKind() != lltok::lbrace) 539 return TokError("Expected '{' here"); 540 541 SmallVector<Value *, 16> Elts; 542 if (ParseMDNodeVector(Elts) 543 || ParseToken(lltok::rbrace, "expected end of metadata node")) 544 return true; 545 546 MDNode *Init = MDNode::get(Context, Elts.data(), Elts.size()); 547 MetadataCache[MetadataID] = Init; 548 std::map<unsigned, std::pair<MetadataBase *, LocTy> >::iterator 549 FI = ForwardRefMDNodes.find(MetadataID); 550 if (FI != ForwardRefMDNodes.end()) { 551 MDNode *FwdNode = cast<MDNode>(FI->second.first); 552 FwdNode->replaceAllUsesWith(Init); 553 ForwardRefMDNodes.erase(FI); 554 } 555 556 return false; 557} 558 559/// ParseAlias: 560/// ::= GlobalVar '=' OptionalVisibility 'alias' OptionalLinkage Aliasee 561/// Aliasee 562/// ::= TypeAndValue 563/// ::= 'bitcast' '(' TypeAndValue 'to' Type ')' 564/// ::= 'getelementptr' 'inbounds'? '(' ... ')' 565/// 566/// Everything through visibility has already been parsed. 567/// 568bool LLParser::ParseAlias(const std::string &Name, LocTy NameLoc, 569 unsigned Visibility) { 570 assert(Lex.getKind() == lltok::kw_alias); 571 Lex.Lex(); 572 unsigned Linkage; 573 LocTy LinkageLoc = Lex.getLoc(); 574 if (ParseOptionalLinkage(Linkage)) 575 return true; 576 577 if (Linkage != GlobalValue::ExternalLinkage && 578 Linkage != GlobalValue::WeakAnyLinkage && 579 Linkage != GlobalValue::WeakODRLinkage && 580 Linkage != GlobalValue::InternalLinkage && 581 Linkage != GlobalValue::PrivateLinkage && 582 Linkage != GlobalValue::LinkerPrivateLinkage) 583 return Error(LinkageLoc, "invalid linkage type for alias"); 584 585 Constant *Aliasee; 586 LocTy AliaseeLoc = Lex.getLoc(); 587 if (Lex.getKind() != lltok::kw_bitcast && 588 Lex.getKind() != lltok::kw_getelementptr) { 589 if (ParseGlobalTypeAndValue(Aliasee)) return true; 590 } else { 591 // The bitcast dest type is not present, it is implied by the dest type. 592 ValID ID; 593 if (ParseValID(ID)) return true; 594 if (ID.Kind != ValID::t_Constant) 595 return Error(AliaseeLoc, "invalid aliasee"); 596 Aliasee = ID.ConstantVal; 597 } 598 599 if (!isa<PointerType>(Aliasee->getType())) 600 return Error(AliaseeLoc, "alias must have pointer type"); 601 602 // Okay, create the alias but do not insert it into the module yet. 603 GlobalAlias* GA = new GlobalAlias(Aliasee->getType(), 604 (GlobalValue::LinkageTypes)Linkage, Name, 605 Aliasee); 606 GA->setVisibility((GlobalValue::VisibilityTypes)Visibility); 607 608 // See if this value already exists in the symbol table. If so, it is either 609 // a redefinition or a definition of a forward reference. 610 if (GlobalValue *Val = 611 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name))) { 612 // See if this was a redefinition. If so, there is no entry in 613 // ForwardRefVals. 614 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 615 I = ForwardRefVals.find(Name); 616 if (I == ForwardRefVals.end()) 617 return Error(NameLoc, "redefinition of global named '@" + Name + "'"); 618 619 // Otherwise, this was a definition of forward ref. Verify that types 620 // agree. 621 if (Val->getType() != GA->getType()) 622 return Error(NameLoc, 623 "forward reference and definition of alias have different types"); 624 625 // If they agree, just RAUW the old value with the alias and remove the 626 // forward ref info. 627 Val->replaceAllUsesWith(GA); 628 Val->eraseFromParent(); 629 ForwardRefVals.erase(I); 630 } 631 632 // Insert into the module, we know its name won't collide now. 633 M->getAliasList().push_back(GA); 634 assert(GA->getNameStr() == Name && "Should not be a name conflict!"); 635 636 return false; 637} 638 639/// ParseGlobal 640/// ::= GlobalVar '=' OptionalLinkage OptionalVisibility OptionalThreadLocal 641/// OptionalAddrSpace GlobalType Type Const 642/// ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 643/// OptionalAddrSpace GlobalType Type Const 644/// 645/// Everything through visibility has been parsed already. 646/// 647bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc, 648 unsigned Linkage, bool HasLinkage, 649 unsigned Visibility) { 650 unsigned AddrSpace; 651 bool ThreadLocal, IsConstant; 652 LocTy TyLoc; 653 654 PATypeHolder Ty(Type::getVoidTy(Context)); 655 if (ParseOptionalToken(lltok::kw_thread_local, ThreadLocal) || 656 ParseOptionalAddrSpace(AddrSpace) || 657 ParseGlobalType(IsConstant) || 658 ParseType(Ty, TyLoc)) 659 return true; 660 661 // If the linkage is specified and is external, then no initializer is 662 // present. 663 Constant *Init = 0; 664 if (!HasLinkage || (Linkage != GlobalValue::DLLImportLinkage && 665 Linkage != GlobalValue::ExternalWeakLinkage && 666 Linkage != GlobalValue::ExternalLinkage)) { 667 if (ParseGlobalValue(Ty, Init)) 668 return true; 669 } 670 671 if (isa<FunctionType>(Ty) || Ty == Type::getLabelTy(Context)) 672 return Error(TyLoc, "invalid type for global variable"); 673 674 GlobalVariable *GV = 0; 675 676 // See if the global was forward referenced, if so, use the global. 677 if (!Name.empty()) { 678 if ((GV = M->getGlobalVariable(Name, true)) && 679 !ForwardRefVals.erase(Name)) 680 return Error(NameLoc, "redefinition of global '@" + Name + "'"); 681 } else { 682 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 683 I = ForwardRefValIDs.find(NumberedVals.size()); 684 if (I != ForwardRefValIDs.end()) { 685 GV = cast<GlobalVariable>(I->second.first); 686 ForwardRefValIDs.erase(I); 687 } 688 } 689 690 if (GV == 0) { 691 GV = new GlobalVariable(*M, Ty, false, GlobalValue::ExternalLinkage, 0, 692 Name, 0, false, AddrSpace); 693 } else { 694 if (GV->getType()->getElementType() != Ty) 695 return Error(TyLoc, 696 "forward reference and definition of global have different types"); 697 698 // Move the forward-reference to the correct spot in the module. 699 M->getGlobalList().splice(M->global_end(), M->getGlobalList(), GV); 700 } 701 702 if (Name.empty()) 703 NumberedVals.push_back(GV); 704 705 // Set the parsed properties on the global. 706 if (Init) 707 GV->setInitializer(Init); 708 GV->setConstant(IsConstant); 709 GV->setLinkage((GlobalValue::LinkageTypes)Linkage); 710 GV->setVisibility((GlobalValue::VisibilityTypes)Visibility); 711 GV->setThreadLocal(ThreadLocal); 712 713 // Parse attributes on the global. 714 while (Lex.getKind() == lltok::comma) { 715 Lex.Lex(); 716 717 if (Lex.getKind() == lltok::kw_section) { 718 Lex.Lex(); 719 GV->setSection(Lex.getStrVal()); 720 if (ParseToken(lltok::StringConstant, "expected global section string")) 721 return true; 722 } else if (Lex.getKind() == lltok::kw_align) { 723 unsigned Alignment; 724 if (ParseOptionalAlignment(Alignment)) return true; 725 GV->setAlignment(Alignment); 726 } else { 727 TokError("unknown global variable property!"); 728 } 729 } 730 731 return false; 732} 733 734 735//===----------------------------------------------------------------------===// 736// GlobalValue Reference/Resolution Routines. 737//===----------------------------------------------------------------------===// 738 739/// GetGlobalVal - Get a value with the specified name or ID, creating a 740/// forward reference record if needed. This can return null if the value 741/// exists but does not have the right type. 742GlobalValue *LLParser::GetGlobalVal(const std::string &Name, const Type *Ty, 743 LocTy Loc) { 744 const PointerType *PTy = dyn_cast<PointerType>(Ty); 745 if (PTy == 0) { 746 Error(Loc, "global variable reference must have pointer type"); 747 return 0; 748 } 749 750 // Look this name up in the normal function symbol table. 751 GlobalValue *Val = 752 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name)); 753 754 // If this is a forward reference for the value, see if we already created a 755 // forward ref record. 756 if (Val == 0) { 757 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 758 I = ForwardRefVals.find(Name); 759 if (I != ForwardRefVals.end()) 760 Val = I->second.first; 761 } 762 763 // If we have the value in the symbol table or fwd-ref table, return it. 764 if (Val) { 765 if (Val->getType() == Ty) return Val; 766 Error(Loc, "'@" + Name + "' defined with type '" + 767 Val->getType()->getDescription() + "'"); 768 return 0; 769 } 770 771 // Otherwise, create a new forward reference for this value and remember it. 772 GlobalValue *FwdVal; 773 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 774 // Function types can return opaque but functions can't. 775 if (isa<OpaqueType>(FT->getReturnType())) { 776 Error(Loc, "function may not return opaque type"); 777 return 0; 778 } 779 780 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M); 781 } else { 782 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 783 GlobalValue::ExternalWeakLinkage, 0, Name); 784 } 785 786 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 787 return FwdVal; 788} 789 790GlobalValue *LLParser::GetGlobalVal(unsigned ID, const Type *Ty, LocTy Loc) { 791 const PointerType *PTy = dyn_cast<PointerType>(Ty); 792 if (PTy == 0) { 793 Error(Loc, "global variable reference must have pointer type"); 794 return 0; 795 } 796 797 GlobalValue *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 798 799 // If this is a forward reference for the value, see if we already created a 800 // forward ref record. 801 if (Val == 0) { 802 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 803 I = ForwardRefValIDs.find(ID); 804 if (I != ForwardRefValIDs.end()) 805 Val = I->second.first; 806 } 807 808 // If we have the value in the symbol table or fwd-ref table, return it. 809 if (Val) { 810 if (Val->getType() == Ty) return Val; 811 Error(Loc, "'@" + utostr(ID) + "' defined with type '" + 812 Val->getType()->getDescription() + "'"); 813 return 0; 814 } 815 816 // Otherwise, create a new forward reference for this value and remember it. 817 GlobalValue *FwdVal; 818 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 819 // Function types can return opaque but functions can't. 820 if (isa<OpaqueType>(FT->getReturnType())) { 821 Error(Loc, "function may not return opaque type"); 822 return 0; 823 } 824 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, "", M); 825 } else { 826 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 827 GlobalValue::ExternalWeakLinkage, 0, ""); 828 } 829 830 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 831 return FwdVal; 832} 833 834 835//===----------------------------------------------------------------------===// 836// Helper Routines. 837//===----------------------------------------------------------------------===// 838 839/// ParseToken - If the current token has the specified kind, eat it and return 840/// success. Otherwise, emit the specified error and return failure. 841bool LLParser::ParseToken(lltok::Kind T, const char *ErrMsg) { 842 if (Lex.getKind() != T) 843 return TokError(ErrMsg); 844 Lex.Lex(); 845 return false; 846} 847 848/// ParseStringConstant 849/// ::= StringConstant 850bool LLParser::ParseStringConstant(std::string &Result) { 851 if (Lex.getKind() != lltok::StringConstant) 852 return TokError("expected string constant"); 853 Result = Lex.getStrVal(); 854 Lex.Lex(); 855 return false; 856} 857 858/// ParseUInt32 859/// ::= uint32 860bool LLParser::ParseUInt32(unsigned &Val) { 861 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned()) 862 return TokError("expected integer"); 863 uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(0xFFFFFFFFULL+1); 864 if (Val64 != unsigned(Val64)) 865 return TokError("expected 32-bit integer (too large)"); 866 Val = Val64; 867 Lex.Lex(); 868 return false; 869} 870 871 872/// ParseOptionalAddrSpace 873/// := /*empty*/ 874/// := 'addrspace' '(' uint32 ')' 875bool LLParser::ParseOptionalAddrSpace(unsigned &AddrSpace) { 876 AddrSpace = 0; 877 if (!EatIfPresent(lltok::kw_addrspace)) 878 return false; 879 return ParseToken(lltok::lparen, "expected '(' in address space") || 880 ParseUInt32(AddrSpace) || 881 ParseToken(lltok::rparen, "expected ')' in address space"); 882} 883 884/// ParseOptionalAttrs - Parse a potentially empty attribute list. AttrKind 885/// indicates what kind of attribute list this is: 0: function arg, 1: result, 886/// 2: function attr. 887/// 3: function arg after value: FIXME: REMOVE IN LLVM 3.0 888bool LLParser::ParseOptionalAttrs(unsigned &Attrs, unsigned AttrKind) { 889 Attrs = Attribute::None; 890 LocTy AttrLoc = Lex.getLoc(); 891 892 while (1) { 893 switch (Lex.getKind()) { 894 case lltok::kw_sext: 895 case lltok::kw_zext: 896 // Treat these as signext/zeroext if they occur in the argument list after 897 // the value, as in "call i8 @foo(i8 10 sext)". If they occur before the 898 // value, as in "call i8 @foo(i8 sext (" then it is part of a constant 899 // expr. 900 // FIXME: REMOVE THIS IN LLVM 3.0 901 if (AttrKind == 3) { 902 if (Lex.getKind() == lltok::kw_sext) 903 Attrs |= Attribute::SExt; 904 else 905 Attrs |= Attribute::ZExt; 906 break; 907 } 908 // FALL THROUGH. 909 default: // End of attributes. 910 if (AttrKind != 2 && (Attrs & Attribute::FunctionOnly)) 911 return Error(AttrLoc, "invalid use of function-only attribute"); 912 913 if (AttrKind != 0 && AttrKind != 3 && (Attrs & Attribute::ParameterOnly)) 914 return Error(AttrLoc, "invalid use of parameter-only attribute"); 915 916 return false; 917 case lltok::kw_zeroext: Attrs |= Attribute::ZExt; break; 918 case lltok::kw_signext: Attrs |= Attribute::SExt; break; 919 case lltok::kw_inreg: Attrs |= Attribute::InReg; break; 920 case lltok::kw_sret: Attrs |= Attribute::StructRet; break; 921 case lltok::kw_noalias: Attrs |= Attribute::NoAlias; break; 922 case lltok::kw_nocapture: Attrs |= Attribute::NoCapture; break; 923 case lltok::kw_byval: Attrs |= Attribute::ByVal; break; 924 case lltok::kw_nest: Attrs |= Attribute::Nest; break; 925 926 case lltok::kw_noreturn: Attrs |= Attribute::NoReturn; break; 927 case lltok::kw_nounwind: Attrs |= Attribute::NoUnwind; break; 928 case lltok::kw_noinline: Attrs |= Attribute::NoInline; break; 929 case lltok::kw_readnone: Attrs |= Attribute::ReadNone; break; 930 case lltok::kw_readonly: Attrs |= Attribute::ReadOnly; break; 931 case lltok::kw_inlinehint: Attrs |= Attribute::InlineHint; break; 932 case lltok::kw_alwaysinline: Attrs |= Attribute::AlwaysInline; break; 933 case lltok::kw_optsize: Attrs |= Attribute::OptimizeForSize; break; 934 case lltok::kw_ssp: Attrs |= Attribute::StackProtect; break; 935 case lltok::kw_sspreq: Attrs |= Attribute::StackProtectReq; break; 936 case lltok::kw_noredzone: Attrs |= Attribute::NoRedZone; break; 937 case lltok::kw_noimplicitfloat: Attrs |= Attribute::NoImplicitFloat; break; 938 case lltok::kw_naked: Attrs |= Attribute::Naked; break; 939 940 case lltok::kw_align: { 941 unsigned Alignment; 942 if (ParseOptionalAlignment(Alignment)) 943 return true; 944 Attrs |= Attribute::constructAlignmentFromInt(Alignment); 945 continue; 946 } 947 } 948 Lex.Lex(); 949 } 950} 951 952/// ParseOptionalLinkage 953/// ::= /*empty*/ 954/// ::= 'private' 955/// ::= 'linker_private' 956/// ::= 'internal' 957/// ::= 'weak' 958/// ::= 'weak_odr' 959/// ::= 'linkonce' 960/// ::= 'linkonce_odr' 961/// ::= 'appending' 962/// ::= 'dllexport' 963/// ::= 'common' 964/// ::= 'dllimport' 965/// ::= 'extern_weak' 966/// ::= 'external' 967bool LLParser::ParseOptionalLinkage(unsigned &Res, bool &HasLinkage) { 968 HasLinkage = false; 969 switch (Lex.getKind()) { 970 default: Res=GlobalValue::ExternalLinkage; return false; 971 case lltok::kw_private: Res = GlobalValue::PrivateLinkage; break; 972 case lltok::kw_linker_private: Res = GlobalValue::LinkerPrivateLinkage; break; 973 case lltok::kw_internal: Res = GlobalValue::InternalLinkage; break; 974 case lltok::kw_weak: Res = GlobalValue::WeakAnyLinkage; break; 975 case lltok::kw_weak_odr: Res = GlobalValue::WeakODRLinkage; break; 976 case lltok::kw_linkonce: Res = GlobalValue::LinkOnceAnyLinkage; break; 977 case lltok::kw_linkonce_odr: Res = GlobalValue::LinkOnceODRLinkage; break; 978 case lltok::kw_available_externally: 979 Res = GlobalValue::AvailableExternallyLinkage; 980 break; 981 case lltok::kw_appending: Res = GlobalValue::AppendingLinkage; break; 982 case lltok::kw_dllexport: Res = GlobalValue::DLLExportLinkage; break; 983 case lltok::kw_common: Res = GlobalValue::CommonLinkage; break; 984 case lltok::kw_dllimport: Res = GlobalValue::DLLImportLinkage; break; 985 case lltok::kw_extern_weak: Res = GlobalValue::ExternalWeakLinkage; break; 986 case lltok::kw_external: Res = GlobalValue::ExternalLinkage; break; 987 } 988 Lex.Lex(); 989 HasLinkage = true; 990 return false; 991} 992 993/// ParseOptionalVisibility 994/// ::= /*empty*/ 995/// ::= 'default' 996/// ::= 'hidden' 997/// ::= 'protected' 998/// 999bool LLParser::ParseOptionalVisibility(unsigned &Res) { 1000 switch (Lex.getKind()) { 1001 default: Res = GlobalValue::DefaultVisibility; return false; 1002 case lltok::kw_default: Res = GlobalValue::DefaultVisibility; break; 1003 case lltok::kw_hidden: Res = GlobalValue::HiddenVisibility; break; 1004 case lltok::kw_protected: Res = GlobalValue::ProtectedVisibility; break; 1005 } 1006 Lex.Lex(); 1007 return false; 1008} 1009 1010/// ParseOptionalCallingConv 1011/// ::= /*empty*/ 1012/// ::= 'ccc' 1013/// ::= 'fastcc' 1014/// ::= 'coldcc' 1015/// ::= 'x86_stdcallcc' 1016/// ::= 'x86_fastcallcc' 1017/// ::= 'arm_apcscc' 1018/// ::= 'arm_aapcscc' 1019/// ::= 'arm_aapcs_vfpcc' 1020/// ::= 'cc' UINT 1021/// 1022bool LLParser::ParseOptionalCallingConv(CallingConv::ID &CC) { 1023 switch (Lex.getKind()) { 1024 default: CC = CallingConv::C; return false; 1025 case lltok::kw_ccc: CC = CallingConv::C; break; 1026 case lltok::kw_fastcc: CC = CallingConv::Fast; break; 1027 case lltok::kw_coldcc: CC = CallingConv::Cold; break; 1028 case lltok::kw_x86_stdcallcc: CC = CallingConv::X86_StdCall; break; 1029 case lltok::kw_x86_fastcallcc: CC = CallingConv::X86_FastCall; break; 1030 case lltok::kw_arm_apcscc: CC = CallingConv::ARM_APCS; break; 1031 case lltok::kw_arm_aapcscc: CC = CallingConv::ARM_AAPCS; break; 1032 case lltok::kw_arm_aapcs_vfpcc:CC = CallingConv::ARM_AAPCS_VFP; break; 1033 case lltok::kw_cc: { 1034 unsigned ArbitraryCC; 1035 Lex.Lex(); 1036 if (ParseUInt32(ArbitraryCC)) { 1037 return true; 1038 } else 1039 CC = static_cast<CallingConv::ID>(ArbitraryCC); 1040 return false; 1041 } 1042 break; 1043 } 1044 1045 Lex.Lex(); 1046 return false; 1047} 1048 1049/// ParseOptionalDbgInfo 1050/// ::= /* empty */ 1051/// ::= 'dbg' !42 1052bool LLParser::ParseOptionalDbgInfo() { 1053 1054 if (!EatIfPresent(lltok::kw_dbg)) 1055 return false; 1056 if (Lex.getKind() != lltok::Metadata) 1057 return TokError("Expected '!' here"); 1058 Lex.Lex(); 1059 MetadataBase *Node; 1060 if (ParseMDNode(Node)) return true; 1061 1062 Metadata &TheMetadata = M->getContext().getMetadata(); 1063 unsigned MDDbgKind = TheMetadata.getMDKind("dbg"); 1064 if (!MDDbgKind) 1065 MDDbgKind = TheMetadata.RegisterMDKind("dbg"); 1066 MDsOnInst.push_back(std::make_pair(MDDbgKind, cast<MDNode>(Node))); 1067 1068 return false; 1069} 1070 1071/// ParseOptionalAlignment 1072/// ::= /* empty */ 1073/// ::= 'align' 4 1074bool LLParser::ParseOptionalAlignment(unsigned &Alignment) { 1075 Alignment = 0; 1076 if (!EatIfPresent(lltok::kw_align)) 1077 return false; 1078 LocTy AlignLoc = Lex.getLoc(); 1079 if (ParseUInt32(Alignment)) return true; 1080 if (!isPowerOf2_32(Alignment)) 1081 return Error(AlignLoc, "alignment is not a power of two"); 1082 return false; 1083} 1084 1085/// ParseOptionalInfo 1086/// ::= OptionalInfo (',' OptionalInfo)+ 1087bool LLParser::ParseOptionalInfo(unsigned &Alignment) { 1088 1089 // FIXME: Handle customized metadata info attached with an instruction. 1090 do { 1091 if (Lex.getKind() == lltok::kw_dbg) { 1092 if (ParseOptionalDbgInfo()) return true; 1093 } else if (Lex.getKind() == lltok::kw_align) { 1094 if (ParseOptionalAlignment(Alignment)) return true; 1095 } else 1096 return true; 1097 } while (EatIfPresent(lltok::comma)); 1098 1099 return false; 1100} 1101 1102 1103/// ParseIndexList 1104/// ::= (',' uint32)+ 1105bool LLParser::ParseIndexList(SmallVectorImpl<unsigned> &Indices) { 1106 if (Lex.getKind() != lltok::comma) 1107 return TokError("expected ',' as start of index list"); 1108 1109 while (EatIfPresent(lltok::comma)) { 1110 unsigned Idx; 1111 if (ParseUInt32(Idx)) return true; 1112 Indices.push_back(Idx); 1113 } 1114 1115 return false; 1116} 1117 1118//===----------------------------------------------------------------------===// 1119// Type Parsing. 1120//===----------------------------------------------------------------------===// 1121 1122/// ParseType - Parse and resolve a full type. 1123bool LLParser::ParseType(PATypeHolder &Result, bool AllowVoid) { 1124 LocTy TypeLoc = Lex.getLoc(); 1125 if (ParseTypeRec(Result)) return true; 1126 1127 // Verify no unresolved uprefs. 1128 if (!UpRefs.empty()) 1129 return Error(UpRefs.back().Loc, "invalid unresolved type up reference"); 1130 1131 if (!AllowVoid && Result.get() == Type::getVoidTy(Context)) 1132 return Error(TypeLoc, "void type only allowed for function results"); 1133 1134 return false; 1135} 1136 1137/// HandleUpRefs - Every time we finish a new layer of types, this function is 1138/// called. It loops through the UpRefs vector, which is a list of the 1139/// currently active types. For each type, if the up-reference is contained in 1140/// the newly completed type, we decrement the level count. When the level 1141/// count reaches zero, the up-referenced type is the type that is passed in: 1142/// thus we can complete the cycle. 1143/// 1144PATypeHolder LLParser::HandleUpRefs(const Type *ty) { 1145 // If Ty isn't abstract, or if there are no up-references in it, then there is 1146 // nothing to resolve here. 1147 if (!ty->isAbstract() || UpRefs.empty()) return ty; 1148 1149 PATypeHolder Ty(ty); 1150#if 0 1151 errs() << "Type '" << Ty->getDescription() 1152 << "' newly formed. Resolving upreferences.\n" 1153 << UpRefs.size() << " upreferences active!\n"; 1154#endif 1155 1156 // If we find any resolvable upreferences (i.e., those whose NestingLevel goes 1157 // to zero), we resolve them all together before we resolve them to Ty. At 1158 // the end of the loop, if there is anything to resolve to Ty, it will be in 1159 // this variable. 1160 OpaqueType *TypeToResolve = 0; 1161 1162 for (unsigned i = 0; i != UpRefs.size(); ++i) { 1163 // Determine if 'Ty' directly contains this up-references 'LastContainedTy'. 1164 bool ContainsType = 1165 std::find(Ty->subtype_begin(), Ty->subtype_end(), 1166 UpRefs[i].LastContainedTy) != Ty->subtype_end(); 1167 1168#if 0 1169 errs() << " UR#" << i << " - TypeContains(" << Ty->getDescription() << ", " 1170 << UpRefs[i].LastContainedTy->getDescription() << ") = " 1171 << (ContainsType ? "true" : "false") 1172 << " level=" << UpRefs[i].NestingLevel << "\n"; 1173#endif 1174 if (!ContainsType) 1175 continue; 1176 1177 // Decrement level of upreference 1178 unsigned Level = --UpRefs[i].NestingLevel; 1179 UpRefs[i].LastContainedTy = Ty; 1180 1181 // If the Up-reference has a non-zero level, it shouldn't be resolved yet. 1182 if (Level != 0) 1183 continue; 1184 1185#if 0 1186 errs() << " * Resolving upreference for " << UpRefs[i].UpRefTy << "\n"; 1187#endif 1188 if (!TypeToResolve) 1189 TypeToResolve = UpRefs[i].UpRefTy; 1190 else 1191 UpRefs[i].UpRefTy->refineAbstractTypeTo(TypeToResolve); 1192 UpRefs.erase(UpRefs.begin()+i); // Remove from upreference list. 1193 --i; // Do not skip the next element. 1194 } 1195 1196 if (TypeToResolve) 1197 TypeToResolve->refineAbstractTypeTo(Ty); 1198 1199 return Ty; 1200} 1201 1202 1203/// ParseTypeRec - The recursive function used to process the internal 1204/// implementation details of types. 1205bool LLParser::ParseTypeRec(PATypeHolder &Result) { 1206 switch (Lex.getKind()) { 1207 default: 1208 return TokError("expected type"); 1209 case lltok::Type: 1210 // TypeRec ::= 'float' | 'void' (etc) 1211 Result = Lex.getTyVal(); 1212 Lex.Lex(); 1213 break; 1214 case lltok::kw_opaque: 1215 // TypeRec ::= 'opaque' 1216 Result = OpaqueType::get(Context); 1217 Lex.Lex(); 1218 break; 1219 case lltok::lbrace: 1220 // TypeRec ::= '{' ... '}' 1221 if (ParseStructType(Result, false)) 1222 return true; 1223 break; 1224 case lltok::lsquare: 1225 // TypeRec ::= '[' ... ']' 1226 Lex.Lex(); // eat the lsquare. 1227 if (ParseArrayVectorType(Result, false)) 1228 return true; 1229 break; 1230 case lltok::less: // Either vector or packed struct. 1231 // TypeRec ::= '<' ... '>' 1232 Lex.Lex(); 1233 if (Lex.getKind() == lltok::lbrace) { 1234 if (ParseStructType(Result, true) || 1235 ParseToken(lltok::greater, "expected '>' at end of packed struct")) 1236 return true; 1237 } else if (ParseArrayVectorType(Result, true)) 1238 return true; 1239 break; 1240 case lltok::LocalVar: 1241 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0 1242 // TypeRec ::= %foo 1243 if (const Type *T = M->getTypeByName(Lex.getStrVal())) { 1244 Result = T; 1245 } else { 1246 Result = OpaqueType::get(Context); 1247 ForwardRefTypes.insert(std::make_pair(Lex.getStrVal(), 1248 std::make_pair(Result, 1249 Lex.getLoc()))); 1250 M->addTypeName(Lex.getStrVal(), Result.get()); 1251 } 1252 Lex.Lex(); 1253 break; 1254 1255 case lltok::LocalVarID: 1256 // TypeRec ::= %4 1257 if (Lex.getUIntVal() < NumberedTypes.size()) 1258 Result = NumberedTypes[Lex.getUIntVal()]; 1259 else { 1260 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 1261 I = ForwardRefTypeIDs.find(Lex.getUIntVal()); 1262 if (I != ForwardRefTypeIDs.end()) 1263 Result = I->second.first; 1264 else { 1265 Result = OpaqueType::get(Context); 1266 ForwardRefTypeIDs.insert(std::make_pair(Lex.getUIntVal(), 1267 std::make_pair(Result, 1268 Lex.getLoc()))); 1269 } 1270 } 1271 Lex.Lex(); 1272 break; 1273 case lltok::backslash: { 1274 // TypeRec ::= '\' 4 1275 Lex.Lex(); 1276 unsigned Val; 1277 if (ParseUInt32(Val)) return true; 1278 OpaqueType *OT = OpaqueType::get(Context); //Use temporary placeholder. 1279 UpRefs.push_back(UpRefRecord(Lex.getLoc(), Val, OT)); 1280 Result = OT; 1281 break; 1282 } 1283 } 1284 1285 // Parse the type suffixes. 1286 while (1) { 1287 switch (Lex.getKind()) { 1288 // End of type. 1289 default: return false; 1290 1291 // TypeRec ::= TypeRec '*' 1292 case lltok::star: 1293 if (Result.get() == Type::getLabelTy(Context)) 1294 return TokError("basic block pointers are invalid"); 1295 if (Result.get() == Type::getVoidTy(Context)) 1296 return TokError("pointers to void are invalid; use i8* instead"); 1297 if (!PointerType::isValidElementType(Result.get())) 1298 return TokError("pointer to this type is invalid"); 1299 Result = HandleUpRefs(PointerType::getUnqual(Result.get())); 1300 Lex.Lex(); 1301 break; 1302 1303 // TypeRec ::= TypeRec 'addrspace' '(' uint32 ')' '*' 1304 case lltok::kw_addrspace: { 1305 if (Result.get() == Type::getLabelTy(Context)) 1306 return TokError("basic block pointers are invalid"); 1307 if (Result.get() == Type::getVoidTy(Context)) 1308 return TokError("pointers to void are invalid; use i8* instead"); 1309 if (!PointerType::isValidElementType(Result.get())) 1310 return TokError("pointer to this type is invalid"); 1311 unsigned AddrSpace; 1312 if (ParseOptionalAddrSpace(AddrSpace) || 1313 ParseToken(lltok::star, "expected '*' in address space")) 1314 return true; 1315 1316 Result = HandleUpRefs(PointerType::get(Result.get(), AddrSpace)); 1317 break; 1318 } 1319 1320 /// Types '(' ArgTypeListI ')' OptFuncAttrs 1321 case lltok::lparen: 1322 if (ParseFunctionType(Result)) 1323 return true; 1324 break; 1325 } 1326 } 1327} 1328 1329/// ParseParameterList 1330/// ::= '(' ')' 1331/// ::= '(' Arg (',' Arg)* ')' 1332/// Arg 1333/// ::= Type OptionalAttributes Value OptionalAttributes 1334bool LLParser::ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList, 1335 PerFunctionState &PFS) { 1336 if (ParseToken(lltok::lparen, "expected '(' in call")) 1337 return true; 1338 1339 while (Lex.getKind() != lltok::rparen) { 1340 // If this isn't the first argument, we need a comma. 1341 if (!ArgList.empty() && 1342 ParseToken(lltok::comma, "expected ',' in argument list")) 1343 return true; 1344 1345 // Parse the argument. 1346 LocTy ArgLoc; 1347 PATypeHolder ArgTy(Type::getVoidTy(Context)); 1348 unsigned ArgAttrs1, ArgAttrs2; 1349 Value *V; 1350 if (ParseType(ArgTy, ArgLoc) || 1351 ParseOptionalAttrs(ArgAttrs1, 0) || 1352 ParseValue(ArgTy, V, PFS) || 1353 // FIXME: Should not allow attributes after the argument, remove this in 1354 // LLVM 3.0. 1355 ParseOptionalAttrs(ArgAttrs2, 3)) 1356 return true; 1357 ArgList.push_back(ParamInfo(ArgLoc, V, ArgAttrs1|ArgAttrs2)); 1358 } 1359 1360 Lex.Lex(); // Lex the ')'. 1361 return false; 1362} 1363 1364 1365 1366/// ParseArgumentList - Parse the argument list for a function type or function 1367/// prototype. If 'inType' is true then we are parsing a FunctionType. 1368/// ::= '(' ArgTypeListI ')' 1369/// ArgTypeListI 1370/// ::= /*empty*/ 1371/// ::= '...' 1372/// ::= ArgTypeList ',' '...' 1373/// ::= ArgType (',' ArgType)* 1374/// 1375bool LLParser::ParseArgumentList(std::vector<ArgInfo> &ArgList, 1376 bool &isVarArg, bool inType) { 1377 isVarArg = false; 1378 assert(Lex.getKind() == lltok::lparen); 1379 Lex.Lex(); // eat the (. 1380 1381 if (Lex.getKind() == lltok::rparen) { 1382 // empty 1383 } else if (Lex.getKind() == lltok::dotdotdot) { 1384 isVarArg = true; 1385 Lex.Lex(); 1386 } else { 1387 LocTy TypeLoc = Lex.getLoc(); 1388 PATypeHolder ArgTy(Type::getVoidTy(Context)); 1389 unsigned Attrs; 1390 std::string Name; 1391 1392 // If we're parsing a type, use ParseTypeRec, because we allow recursive 1393 // types (such as a function returning a pointer to itself). If parsing a 1394 // function prototype, we require fully resolved types. 1395 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1396 ParseOptionalAttrs(Attrs, 0)) return true; 1397 1398 if (ArgTy == Type::getVoidTy(Context)) 1399 return Error(TypeLoc, "argument can not have void type"); 1400 1401 if (Lex.getKind() == lltok::LocalVar || 1402 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1403 Name = Lex.getStrVal(); 1404 Lex.Lex(); 1405 } 1406 1407 if (!FunctionType::isValidArgumentType(ArgTy)) 1408 return Error(TypeLoc, "invalid type for function argument"); 1409 1410 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1411 1412 while (EatIfPresent(lltok::comma)) { 1413 // Handle ... at end of arg list. 1414 if (EatIfPresent(lltok::dotdotdot)) { 1415 isVarArg = true; 1416 break; 1417 } 1418 1419 // Otherwise must be an argument type. 1420 TypeLoc = Lex.getLoc(); 1421 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1422 ParseOptionalAttrs(Attrs, 0)) return true; 1423 1424 if (ArgTy == Type::getVoidTy(Context)) 1425 return Error(TypeLoc, "argument can not have void type"); 1426 1427 if (Lex.getKind() == lltok::LocalVar || 1428 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1429 Name = Lex.getStrVal(); 1430 Lex.Lex(); 1431 } else { 1432 Name = ""; 1433 } 1434 1435 if (!ArgTy->isFirstClassType() && !isa<OpaqueType>(ArgTy)) 1436 return Error(TypeLoc, "invalid type for function argument"); 1437 1438 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1439 } 1440 } 1441 1442 return ParseToken(lltok::rparen, "expected ')' at end of argument list"); 1443} 1444 1445/// ParseFunctionType 1446/// ::= Type ArgumentList OptionalAttrs 1447bool LLParser::ParseFunctionType(PATypeHolder &Result) { 1448 assert(Lex.getKind() == lltok::lparen); 1449 1450 if (!FunctionType::isValidReturnType(Result)) 1451 return TokError("invalid function return type"); 1452 1453 std::vector<ArgInfo> ArgList; 1454 bool isVarArg; 1455 unsigned Attrs; 1456 if (ParseArgumentList(ArgList, isVarArg, true) || 1457 // FIXME: Allow, but ignore attributes on function types! 1458 // FIXME: Remove in LLVM 3.0 1459 ParseOptionalAttrs(Attrs, 2)) 1460 return true; 1461 1462 // Reject names on the arguments lists. 1463 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 1464 if (!ArgList[i].Name.empty()) 1465 return Error(ArgList[i].Loc, "argument name invalid in function type"); 1466 if (!ArgList[i].Attrs != 0) { 1467 // Allow but ignore attributes on function types; this permits 1468 // auto-upgrade. 1469 // FIXME: REJECT ATTRIBUTES ON FUNCTION TYPES in LLVM 3.0 1470 } 1471 } 1472 1473 std::vector<const Type*> ArgListTy; 1474 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 1475 ArgListTy.push_back(ArgList[i].Type); 1476 1477 Result = HandleUpRefs(FunctionType::get(Result.get(), 1478 ArgListTy, isVarArg)); 1479 return false; 1480} 1481 1482/// ParseStructType: Handles packed and unpacked types. </> parsed elsewhere. 1483/// TypeRec 1484/// ::= '{' '}' 1485/// ::= '{' TypeRec (',' TypeRec)* '}' 1486/// ::= '<' '{' '}' '>' 1487/// ::= '<' '{' TypeRec (',' TypeRec)* '}' '>' 1488bool LLParser::ParseStructType(PATypeHolder &Result, bool Packed) { 1489 assert(Lex.getKind() == lltok::lbrace); 1490 Lex.Lex(); // Consume the '{' 1491 1492 if (EatIfPresent(lltok::rbrace)) { 1493 Result = StructType::get(Context, Packed); 1494 return false; 1495 } 1496 1497 std::vector<PATypeHolder> ParamsList; 1498 LocTy EltTyLoc = Lex.getLoc(); 1499 if (ParseTypeRec(Result)) return true; 1500 ParamsList.push_back(Result); 1501 1502 if (Result == Type::getVoidTy(Context)) 1503 return Error(EltTyLoc, "struct element can not have void type"); 1504 if (!StructType::isValidElementType(Result)) 1505 return Error(EltTyLoc, "invalid element type for struct"); 1506 1507 while (EatIfPresent(lltok::comma)) { 1508 EltTyLoc = Lex.getLoc(); 1509 if (ParseTypeRec(Result)) return true; 1510 1511 if (Result == Type::getVoidTy(Context)) 1512 return Error(EltTyLoc, "struct element can not have void type"); 1513 if (!StructType::isValidElementType(Result)) 1514 return Error(EltTyLoc, "invalid element type for struct"); 1515 1516 ParamsList.push_back(Result); 1517 } 1518 1519 if (ParseToken(lltok::rbrace, "expected '}' at end of struct")) 1520 return true; 1521 1522 std::vector<const Type*> ParamsListTy; 1523 for (unsigned i = 0, e = ParamsList.size(); i != e; ++i) 1524 ParamsListTy.push_back(ParamsList[i].get()); 1525 Result = HandleUpRefs(StructType::get(Context, ParamsListTy, Packed)); 1526 return false; 1527} 1528 1529/// ParseArrayVectorType - Parse an array or vector type, assuming the first 1530/// token has already been consumed. 1531/// TypeRec 1532/// ::= '[' APSINTVAL 'x' Types ']' 1533/// ::= '<' APSINTVAL 'x' Types '>' 1534bool LLParser::ParseArrayVectorType(PATypeHolder &Result, bool isVector) { 1535 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned() || 1536 Lex.getAPSIntVal().getBitWidth() > 64) 1537 return TokError("expected number in address space"); 1538 1539 LocTy SizeLoc = Lex.getLoc(); 1540 uint64_t Size = Lex.getAPSIntVal().getZExtValue(); 1541 Lex.Lex(); 1542 1543 if (ParseToken(lltok::kw_x, "expected 'x' after element count")) 1544 return true; 1545 1546 LocTy TypeLoc = Lex.getLoc(); 1547 PATypeHolder EltTy(Type::getVoidTy(Context)); 1548 if (ParseTypeRec(EltTy)) return true; 1549 1550 if (EltTy == Type::getVoidTy(Context)) 1551 return Error(TypeLoc, "array and vector element type cannot be void"); 1552 1553 if (ParseToken(isVector ? lltok::greater : lltok::rsquare, 1554 "expected end of sequential type")) 1555 return true; 1556 1557 if (isVector) { 1558 if (Size == 0) 1559 return Error(SizeLoc, "zero element vector is illegal"); 1560 if ((unsigned)Size != Size) 1561 return Error(SizeLoc, "size too large for vector"); 1562 if (!VectorType::isValidElementType(EltTy)) 1563 return Error(TypeLoc, "vector element type must be fp or integer"); 1564 Result = VectorType::get(EltTy, unsigned(Size)); 1565 } else { 1566 if (!ArrayType::isValidElementType(EltTy)) 1567 return Error(TypeLoc, "invalid array element type"); 1568 Result = HandleUpRefs(ArrayType::get(EltTy, Size)); 1569 } 1570 return false; 1571} 1572 1573//===----------------------------------------------------------------------===// 1574// Function Semantic Analysis. 1575//===----------------------------------------------------------------------===// 1576 1577LLParser::PerFunctionState::PerFunctionState(LLParser &p, Function &f) 1578 : P(p), F(f) { 1579 1580 // Insert unnamed arguments into the NumberedVals list. 1581 for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 1582 AI != E; ++AI) 1583 if (!AI->hasName()) 1584 NumberedVals.push_back(AI); 1585} 1586 1587LLParser::PerFunctionState::~PerFunctionState() { 1588 // If there were any forward referenced non-basicblock values, delete them. 1589 for (std::map<std::string, std::pair<Value*, LocTy> >::iterator 1590 I = ForwardRefVals.begin(), E = ForwardRefVals.end(); I != E; ++I) 1591 if (!isa<BasicBlock>(I->second.first)) { 1592 I->second.first->replaceAllUsesWith( 1593 UndefValue::get(I->second.first->getType())); 1594 delete I->second.first; 1595 I->second.first = 0; 1596 } 1597 1598 for (std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1599 I = ForwardRefValIDs.begin(), E = ForwardRefValIDs.end(); I != E; ++I) 1600 if (!isa<BasicBlock>(I->second.first)) { 1601 I->second.first->replaceAllUsesWith( 1602 UndefValue::get(I->second.first->getType())); 1603 delete I->second.first; 1604 I->second.first = 0; 1605 } 1606} 1607 1608bool LLParser::PerFunctionState::VerifyFunctionComplete() { 1609 if (!ForwardRefVals.empty()) 1610 return P.Error(ForwardRefVals.begin()->second.second, 1611 "use of undefined value '%" + ForwardRefVals.begin()->first + 1612 "'"); 1613 if (!ForwardRefValIDs.empty()) 1614 return P.Error(ForwardRefValIDs.begin()->second.second, 1615 "use of undefined value '%" + 1616 utostr(ForwardRefValIDs.begin()->first) + "'"); 1617 return false; 1618} 1619 1620 1621/// GetVal - Get a value with the specified name or ID, creating a 1622/// forward reference record if needed. This can return null if the value 1623/// exists but does not have the right type. 1624Value *LLParser::PerFunctionState::GetVal(const std::string &Name, 1625 const Type *Ty, LocTy Loc) { 1626 // Look this name up in the normal function symbol table. 1627 Value *Val = F.getValueSymbolTable().lookup(Name); 1628 1629 // If this is a forward reference for the value, see if we already created a 1630 // forward ref record. 1631 if (Val == 0) { 1632 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1633 I = ForwardRefVals.find(Name); 1634 if (I != ForwardRefVals.end()) 1635 Val = I->second.first; 1636 } 1637 1638 // If we have the value in the symbol table or fwd-ref table, return it. 1639 if (Val) { 1640 if (Val->getType() == Ty) return Val; 1641 if (Ty == Type::getLabelTy(F.getContext())) 1642 P.Error(Loc, "'%" + Name + "' is not a basic block"); 1643 else 1644 P.Error(Loc, "'%" + Name + "' defined with type '" + 1645 Val->getType()->getDescription() + "'"); 1646 return 0; 1647 } 1648 1649 // Don't make placeholders with invalid type. 1650 if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty) && 1651 Ty != Type::getLabelTy(F.getContext())) { 1652 P.Error(Loc, "invalid use of a non-first-class type"); 1653 return 0; 1654 } 1655 1656 // Otherwise, create a new forward reference for this value and remember it. 1657 Value *FwdVal; 1658 if (Ty == Type::getLabelTy(F.getContext())) 1659 FwdVal = BasicBlock::Create(F.getContext(), Name, &F); 1660 else 1661 FwdVal = new Argument(Ty, Name); 1662 1663 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 1664 return FwdVal; 1665} 1666 1667Value *LLParser::PerFunctionState::GetVal(unsigned ID, const Type *Ty, 1668 LocTy Loc) { 1669 // Look this name up in the normal function symbol table. 1670 Value *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 1671 1672 // If this is a forward reference for the value, see if we already created a 1673 // forward ref record. 1674 if (Val == 0) { 1675 std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1676 I = ForwardRefValIDs.find(ID); 1677 if (I != ForwardRefValIDs.end()) 1678 Val = I->second.first; 1679 } 1680 1681 // If we have the value in the symbol table or fwd-ref table, return it. 1682 if (Val) { 1683 if (Val->getType() == Ty) return Val; 1684 if (Ty == Type::getLabelTy(F.getContext())) 1685 P.Error(Loc, "'%" + utostr(ID) + "' is not a basic block"); 1686 else 1687 P.Error(Loc, "'%" + utostr(ID) + "' defined with type '" + 1688 Val->getType()->getDescription() + "'"); 1689 return 0; 1690 } 1691 1692 if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty) && 1693 Ty != Type::getLabelTy(F.getContext())) { 1694 P.Error(Loc, "invalid use of a non-first-class type"); 1695 return 0; 1696 } 1697 1698 // Otherwise, create a new forward reference for this value and remember it. 1699 Value *FwdVal; 1700 if (Ty == Type::getLabelTy(F.getContext())) 1701 FwdVal = BasicBlock::Create(F.getContext(), "", &F); 1702 else 1703 FwdVal = new Argument(Ty); 1704 1705 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 1706 return FwdVal; 1707} 1708 1709/// SetInstName - After an instruction is parsed and inserted into its 1710/// basic block, this installs its name. 1711bool LLParser::PerFunctionState::SetInstName(int NameID, 1712 const std::string &NameStr, 1713 LocTy NameLoc, Instruction *Inst) { 1714 // If this instruction has void type, it cannot have a name or ID specified. 1715 if (Inst->getType() == Type::getVoidTy(F.getContext())) { 1716 if (NameID != -1 || !NameStr.empty()) 1717 return P.Error(NameLoc, "instructions returning void cannot have a name"); 1718 return false; 1719 } 1720 1721 // If this was a numbered instruction, verify that the instruction is the 1722 // expected value and resolve any forward references. 1723 if (NameStr.empty()) { 1724 // If neither a name nor an ID was specified, just use the next ID. 1725 if (NameID == -1) 1726 NameID = NumberedVals.size(); 1727 1728 if (unsigned(NameID) != NumberedVals.size()) 1729 return P.Error(NameLoc, "instruction expected to be numbered '%" + 1730 utostr(NumberedVals.size()) + "'"); 1731 1732 std::map<unsigned, std::pair<Value*, LocTy> >::iterator FI = 1733 ForwardRefValIDs.find(NameID); 1734 if (FI != ForwardRefValIDs.end()) { 1735 if (FI->second.first->getType() != Inst->getType()) 1736 return P.Error(NameLoc, "instruction forward referenced with type '" + 1737 FI->second.first->getType()->getDescription() + "'"); 1738 FI->second.first->replaceAllUsesWith(Inst); 1739 delete FI->second.first; 1740 ForwardRefValIDs.erase(FI); 1741 } 1742 1743 NumberedVals.push_back(Inst); 1744 return false; 1745 } 1746 1747 // Otherwise, the instruction had a name. Resolve forward refs and set it. 1748 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1749 FI = ForwardRefVals.find(NameStr); 1750 if (FI != ForwardRefVals.end()) { 1751 if (FI->second.first->getType() != Inst->getType()) 1752 return P.Error(NameLoc, "instruction forward referenced with type '" + 1753 FI->second.first->getType()->getDescription() + "'"); 1754 FI->second.first->replaceAllUsesWith(Inst); 1755 delete FI->second.first; 1756 ForwardRefVals.erase(FI); 1757 } 1758 1759 // Set the name on the instruction. 1760 Inst->setName(NameStr); 1761 1762 if (Inst->getNameStr() != NameStr) 1763 return P.Error(NameLoc, "multiple definition of local value named '" + 1764 NameStr + "'"); 1765 return false; 1766} 1767 1768/// GetBB - Get a basic block with the specified name or ID, creating a 1769/// forward reference record if needed. 1770BasicBlock *LLParser::PerFunctionState::GetBB(const std::string &Name, 1771 LocTy Loc) { 1772 return cast_or_null<BasicBlock>(GetVal(Name, 1773 Type::getLabelTy(F.getContext()), Loc)); 1774} 1775 1776BasicBlock *LLParser::PerFunctionState::GetBB(unsigned ID, LocTy Loc) { 1777 return cast_or_null<BasicBlock>(GetVal(ID, 1778 Type::getLabelTy(F.getContext()), Loc)); 1779} 1780 1781/// DefineBB - Define the specified basic block, which is either named or 1782/// unnamed. If there is an error, this returns null otherwise it returns 1783/// the block being defined. 1784BasicBlock *LLParser::PerFunctionState::DefineBB(const std::string &Name, 1785 LocTy Loc) { 1786 BasicBlock *BB; 1787 if (Name.empty()) 1788 BB = GetBB(NumberedVals.size(), Loc); 1789 else 1790 BB = GetBB(Name, Loc); 1791 if (BB == 0) return 0; // Already diagnosed error. 1792 1793 // Move the block to the end of the function. Forward ref'd blocks are 1794 // inserted wherever they happen to be referenced. 1795 F.getBasicBlockList().splice(F.end(), F.getBasicBlockList(), BB); 1796 1797 // Remove the block from forward ref sets. 1798 if (Name.empty()) { 1799 ForwardRefValIDs.erase(NumberedVals.size()); 1800 NumberedVals.push_back(BB); 1801 } else { 1802 // BB forward references are already in the function symbol table. 1803 ForwardRefVals.erase(Name); 1804 } 1805 1806 return BB; 1807} 1808 1809//===----------------------------------------------------------------------===// 1810// Constants. 1811//===----------------------------------------------------------------------===// 1812 1813/// ParseValID - Parse an abstract value that doesn't necessarily have a 1814/// type implied. For example, if we parse "4" we don't know what integer type 1815/// it has. The value will later be combined with its type and checked for 1816/// sanity. 1817bool LLParser::ParseValID(ValID &ID) { 1818 ID.Loc = Lex.getLoc(); 1819 switch (Lex.getKind()) { 1820 default: return TokError("expected value token"); 1821 case lltok::GlobalID: // @42 1822 ID.UIntVal = Lex.getUIntVal(); 1823 ID.Kind = ValID::t_GlobalID; 1824 break; 1825 case lltok::GlobalVar: // @foo 1826 ID.StrVal = Lex.getStrVal(); 1827 ID.Kind = ValID::t_GlobalName; 1828 break; 1829 case lltok::LocalVarID: // %42 1830 ID.UIntVal = Lex.getUIntVal(); 1831 ID.Kind = ValID::t_LocalID; 1832 break; 1833 case lltok::LocalVar: // %foo 1834 case lltok::StringConstant: // "foo" - FIXME: REMOVE IN LLVM 3.0 1835 ID.StrVal = Lex.getStrVal(); 1836 ID.Kind = ValID::t_LocalName; 1837 break; 1838 case lltok::Metadata: { // !{...} MDNode, !"foo" MDString 1839 ID.Kind = ValID::t_Metadata; 1840 Lex.Lex(); 1841 if (Lex.getKind() == lltok::lbrace) { 1842 SmallVector<Value*, 16> Elts; 1843 if (ParseMDNodeVector(Elts) || 1844 ParseToken(lltok::rbrace, "expected end of metadata node")) 1845 return true; 1846 1847 ID.MetadataVal = MDNode::get(Context, Elts.data(), Elts.size()); 1848 return false; 1849 } 1850 1851 // Standalone metadata reference 1852 // !{ ..., !42, ... } 1853 if (!ParseMDNode(ID.MetadataVal)) 1854 return false; 1855 1856 // MDString: 1857 // ::= '!' STRINGCONSTANT 1858 if (ParseMDString(ID.MetadataVal)) return true; 1859 ID.Kind = ValID::t_Metadata; 1860 return false; 1861 } 1862 case lltok::APSInt: 1863 ID.APSIntVal = Lex.getAPSIntVal(); 1864 ID.Kind = ValID::t_APSInt; 1865 break; 1866 case lltok::APFloat: 1867 ID.APFloatVal = Lex.getAPFloatVal(); 1868 ID.Kind = ValID::t_APFloat; 1869 break; 1870 case lltok::kw_true: 1871 ID.ConstantVal = ConstantInt::getTrue(Context); 1872 ID.Kind = ValID::t_Constant; 1873 break; 1874 case lltok::kw_false: 1875 ID.ConstantVal = ConstantInt::getFalse(Context); 1876 ID.Kind = ValID::t_Constant; 1877 break; 1878 case lltok::kw_null: ID.Kind = ValID::t_Null; break; 1879 case lltok::kw_undef: ID.Kind = ValID::t_Undef; break; 1880 case lltok::kw_zeroinitializer: ID.Kind = ValID::t_Zero; break; 1881 1882 case lltok::lbrace: { 1883 // ValID ::= '{' ConstVector '}' 1884 Lex.Lex(); 1885 SmallVector<Constant*, 16> Elts; 1886 if (ParseGlobalValueVector(Elts) || 1887 ParseToken(lltok::rbrace, "expected end of struct constant")) 1888 return true; 1889 1890 ID.ConstantVal = ConstantStruct::get(Context, Elts.data(), 1891 Elts.size(), false); 1892 ID.Kind = ValID::t_Constant; 1893 return false; 1894 } 1895 case lltok::less: { 1896 // ValID ::= '<' ConstVector '>' --> Vector. 1897 // ValID ::= '<' '{' ConstVector '}' '>' --> Packed Struct. 1898 Lex.Lex(); 1899 bool isPackedStruct = EatIfPresent(lltok::lbrace); 1900 1901 SmallVector<Constant*, 16> Elts; 1902 LocTy FirstEltLoc = Lex.getLoc(); 1903 if (ParseGlobalValueVector(Elts) || 1904 (isPackedStruct && 1905 ParseToken(lltok::rbrace, "expected end of packed struct")) || 1906 ParseToken(lltok::greater, "expected end of constant")) 1907 return true; 1908 1909 if (isPackedStruct) { 1910 ID.ConstantVal = 1911 ConstantStruct::get(Context, Elts.data(), Elts.size(), true); 1912 ID.Kind = ValID::t_Constant; 1913 return false; 1914 } 1915 1916 if (Elts.empty()) 1917 return Error(ID.Loc, "constant vector must not be empty"); 1918 1919 if (!Elts[0]->getType()->isInteger() && 1920 !Elts[0]->getType()->isFloatingPoint()) 1921 return Error(FirstEltLoc, 1922 "vector elements must have integer or floating point type"); 1923 1924 // Verify that all the vector elements have the same type. 1925 for (unsigned i = 1, e = Elts.size(); i != e; ++i) 1926 if (Elts[i]->getType() != Elts[0]->getType()) 1927 return Error(FirstEltLoc, 1928 "vector element #" + utostr(i) + 1929 " is not of type '" + Elts[0]->getType()->getDescription()); 1930 1931 ID.ConstantVal = ConstantVector::get(Elts.data(), Elts.size()); 1932 ID.Kind = ValID::t_Constant; 1933 return false; 1934 } 1935 case lltok::lsquare: { // Array Constant 1936 Lex.Lex(); 1937 SmallVector<Constant*, 16> Elts; 1938 LocTy FirstEltLoc = Lex.getLoc(); 1939 if (ParseGlobalValueVector(Elts) || 1940 ParseToken(lltok::rsquare, "expected end of array constant")) 1941 return true; 1942 1943 // Handle empty element. 1944 if (Elts.empty()) { 1945 // Use undef instead of an array because it's inconvenient to determine 1946 // the element type at this point, there being no elements to examine. 1947 ID.Kind = ValID::t_EmptyArray; 1948 return false; 1949 } 1950 1951 if (!Elts[0]->getType()->isFirstClassType()) 1952 return Error(FirstEltLoc, "invalid array element type: " + 1953 Elts[0]->getType()->getDescription()); 1954 1955 ArrayType *ATy = ArrayType::get(Elts[0]->getType(), Elts.size()); 1956 1957 // Verify all elements are correct type! 1958 for (unsigned i = 0, e = Elts.size(); i != e; ++i) { 1959 if (Elts[i]->getType() != Elts[0]->getType()) 1960 return Error(FirstEltLoc, 1961 "array element #" + utostr(i) + 1962 " is not of type '" +Elts[0]->getType()->getDescription()); 1963 } 1964 1965 ID.ConstantVal = ConstantArray::get(ATy, Elts.data(), Elts.size()); 1966 ID.Kind = ValID::t_Constant; 1967 return false; 1968 } 1969 case lltok::kw_c: // c "foo" 1970 Lex.Lex(); 1971 ID.ConstantVal = ConstantArray::get(Context, Lex.getStrVal(), false); 1972 if (ParseToken(lltok::StringConstant, "expected string")) return true; 1973 ID.Kind = ValID::t_Constant; 1974 return false; 1975 1976 case lltok::kw_asm: { 1977 // ValID ::= 'asm' SideEffect? STRINGCONSTANT ',' STRINGCONSTANT 1978 bool HasSideEffect; 1979 Lex.Lex(); 1980 if (ParseOptionalToken(lltok::kw_sideeffect, HasSideEffect) || 1981 ParseStringConstant(ID.StrVal) || 1982 ParseToken(lltok::comma, "expected comma in inline asm expression") || 1983 ParseToken(lltok::StringConstant, "expected constraint string")) 1984 return true; 1985 ID.StrVal2 = Lex.getStrVal(); 1986 ID.UIntVal = HasSideEffect; 1987 ID.Kind = ValID::t_InlineAsm; 1988 return false; 1989 } 1990 1991 case lltok::kw_trunc: 1992 case lltok::kw_zext: 1993 case lltok::kw_sext: 1994 case lltok::kw_fptrunc: 1995 case lltok::kw_fpext: 1996 case lltok::kw_bitcast: 1997 case lltok::kw_uitofp: 1998 case lltok::kw_sitofp: 1999 case lltok::kw_fptoui: 2000 case lltok::kw_fptosi: 2001 case lltok::kw_inttoptr: 2002 case lltok::kw_ptrtoint: { 2003 unsigned Opc = Lex.getUIntVal(); 2004 PATypeHolder DestTy(Type::getVoidTy(Context)); 2005 Constant *SrcVal; 2006 Lex.Lex(); 2007 if (ParseToken(lltok::lparen, "expected '(' after constantexpr cast") || 2008 ParseGlobalTypeAndValue(SrcVal) || 2009 ParseToken(lltok::kw_to, "expected 'to' in constantexpr cast") || 2010 ParseType(DestTy) || 2011 ParseToken(lltok::rparen, "expected ')' at end of constantexpr cast")) 2012 return true; 2013 if (!CastInst::castIsValid((Instruction::CastOps)Opc, SrcVal, DestTy)) 2014 return Error(ID.Loc, "invalid cast opcode for cast from '" + 2015 SrcVal->getType()->getDescription() + "' to '" + 2016 DestTy->getDescription() + "'"); 2017 ID.ConstantVal = ConstantExpr::getCast((Instruction::CastOps)Opc, 2018 SrcVal, DestTy); 2019 ID.Kind = ValID::t_Constant; 2020 return false; 2021 } 2022 case lltok::kw_extractvalue: { 2023 Lex.Lex(); 2024 Constant *Val; 2025 SmallVector<unsigned, 4> Indices; 2026 if (ParseToken(lltok::lparen, "expected '(' in extractvalue constantexpr")|| 2027 ParseGlobalTypeAndValue(Val) || 2028 ParseIndexList(Indices) || 2029 ParseToken(lltok::rparen, "expected ')' in extractvalue constantexpr")) 2030 return true; 2031 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 2032 return Error(ID.Loc, "extractvalue operand must be array or struct"); 2033 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 2034 Indices.end())) 2035 return Error(ID.Loc, "invalid indices for extractvalue"); 2036 ID.ConstantVal = 2037 ConstantExpr::getExtractValue(Val, Indices.data(), Indices.size()); 2038 ID.Kind = ValID::t_Constant; 2039 return false; 2040 } 2041 case lltok::kw_insertvalue: { 2042 Lex.Lex(); 2043 Constant *Val0, *Val1; 2044 SmallVector<unsigned, 4> Indices; 2045 if (ParseToken(lltok::lparen, "expected '(' in insertvalue constantexpr")|| 2046 ParseGlobalTypeAndValue(Val0) || 2047 ParseToken(lltok::comma, "expected comma in insertvalue constantexpr")|| 2048 ParseGlobalTypeAndValue(Val1) || 2049 ParseIndexList(Indices) || 2050 ParseToken(lltok::rparen, "expected ')' in insertvalue constantexpr")) 2051 return true; 2052 if (!isa<StructType>(Val0->getType()) && !isa<ArrayType>(Val0->getType())) 2053 return Error(ID.Loc, "extractvalue operand must be array or struct"); 2054 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 2055 Indices.end())) 2056 return Error(ID.Loc, "invalid indices for insertvalue"); 2057 ID.ConstantVal = ConstantExpr::getInsertValue(Val0, Val1, 2058 Indices.data(), Indices.size()); 2059 ID.Kind = ValID::t_Constant; 2060 return false; 2061 } 2062 case lltok::kw_icmp: 2063 case lltok::kw_fcmp: { 2064 unsigned PredVal, Opc = Lex.getUIntVal(); 2065 Constant *Val0, *Val1; 2066 Lex.Lex(); 2067 if (ParseCmpPredicate(PredVal, Opc) || 2068 ParseToken(lltok::lparen, "expected '(' in compare constantexpr") || 2069 ParseGlobalTypeAndValue(Val0) || 2070 ParseToken(lltok::comma, "expected comma in compare constantexpr") || 2071 ParseGlobalTypeAndValue(Val1) || 2072 ParseToken(lltok::rparen, "expected ')' in compare constantexpr")) 2073 return true; 2074 2075 if (Val0->getType() != Val1->getType()) 2076 return Error(ID.Loc, "compare operands must have the same type"); 2077 2078 CmpInst::Predicate Pred = (CmpInst::Predicate)PredVal; 2079 2080 if (Opc == Instruction::FCmp) { 2081 if (!Val0->getType()->isFPOrFPVector()) 2082 return Error(ID.Loc, "fcmp requires floating point operands"); 2083 ID.ConstantVal = ConstantExpr::getFCmp(Pred, Val0, Val1); 2084 } else { 2085 assert(Opc == Instruction::ICmp && "Unexpected opcode for CmpInst!"); 2086 if (!Val0->getType()->isIntOrIntVector() && 2087 !isa<PointerType>(Val0->getType())) 2088 return Error(ID.Loc, "icmp requires pointer or integer operands"); 2089 ID.ConstantVal = ConstantExpr::getICmp(Pred, Val0, Val1); 2090 } 2091 ID.Kind = ValID::t_Constant; 2092 return false; 2093 } 2094 2095 // Binary Operators. 2096 case lltok::kw_add: 2097 case lltok::kw_fadd: 2098 case lltok::kw_sub: 2099 case lltok::kw_fsub: 2100 case lltok::kw_mul: 2101 case lltok::kw_fmul: 2102 case lltok::kw_udiv: 2103 case lltok::kw_sdiv: 2104 case lltok::kw_fdiv: 2105 case lltok::kw_urem: 2106 case lltok::kw_srem: 2107 case lltok::kw_frem: { 2108 bool NUW = false; 2109 bool NSW = false; 2110 bool Exact = false; 2111 unsigned Opc = Lex.getUIntVal(); 2112 Constant *Val0, *Val1; 2113 Lex.Lex(); 2114 LocTy ModifierLoc = Lex.getLoc(); 2115 if (Opc == Instruction::Add || 2116 Opc == Instruction::Sub || 2117 Opc == Instruction::Mul) { 2118 if (EatIfPresent(lltok::kw_nuw)) 2119 NUW = true; 2120 if (EatIfPresent(lltok::kw_nsw)) { 2121 NSW = true; 2122 if (EatIfPresent(lltok::kw_nuw)) 2123 NUW = true; 2124 } 2125 } else if (Opc == Instruction::SDiv) { 2126 if (EatIfPresent(lltok::kw_exact)) 2127 Exact = true; 2128 } 2129 if (ParseToken(lltok::lparen, "expected '(' in binary constantexpr") || 2130 ParseGlobalTypeAndValue(Val0) || 2131 ParseToken(lltok::comma, "expected comma in binary constantexpr") || 2132 ParseGlobalTypeAndValue(Val1) || 2133 ParseToken(lltok::rparen, "expected ')' in binary constantexpr")) 2134 return true; 2135 if (Val0->getType() != Val1->getType()) 2136 return Error(ID.Loc, "operands of constexpr must have same type"); 2137 if (!Val0->getType()->isIntOrIntVector()) { 2138 if (NUW) 2139 return Error(ModifierLoc, "nuw only applies to integer operations"); 2140 if (NSW) 2141 return Error(ModifierLoc, "nsw only applies to integer operations"); 2142 } 2143 // API compatibility: Accept either integer or floating-point types with 2144 // add, sub, and mul. 2145 if (!Val0->getType()->isIntOrIntVector() && 2146 !Val0->getType()->isFPOrFPVector()) 2147 return Error(ID.Loc,"constexpr requires integer, fp, or vector operands"); 2148 unsigned Flags = 0; 2149 if (NUW) Flags |= OverflowingBinaryOperator::NoUnsignedWrap; 2150 if (NSW) Flags |= OverflowingBinaryOperator::NoSignedWrap; 2151 if (Exact) Flags |= SDivOperator::IsExact; 2152 Constant *C = ConstantExpr::get(Opc, Val0, Val1, Flags); 2153 ID.ConstantVal = C; 2154 ID.Kind = ValID::t_Constant; 2155 return false; 2156 } 2157 2158 // Logical Operations 2159 case lltok::kw_shl: 2160 case lltok::kw_lshr: 2161 case lltok::kw_ashr: 2162 case lltok::kw_and: 2163 case lltok::kw_or: 2164 case lltok::kw_xor: { 2165 unsigned Opc = Lex.getUIntVal(); 2166 Constant *Val0, *Val1; 2167 Lex.Lex(); 2168 if (ParseToken(lltok::lparen, "expected '(' in logical constantexpr") || 2169 ParseGlobalTypeAndValue(Val0) || 2170 ParseToken(lltok::comma, "expected comma in logical constantexpr") || 2171 ParseGlobalTypeAndValue(Val1) || 2172 ParseToken(lltok::rparen, "expected ')' in logical constantexpr")) 2173 return true; 2174 if (Val0->getType() != Val1->getType()) 2175 return Error(ID.Loc, "operands of constexpr must have same type"); 2176 if (!Val0->getType()->isIntOrIntVector()) 2177 return Error(ID.Loc, 2178 "constexpr requires integer or integer vector operands"); 2179 ID.ConstantVal = ConstantExpr::get(Opc, Val0, Val1); 2180 ID.Kind = ValID::t_Constant; 2181 return false; 2182 } 2183 2184 case lltok::kw_getelementptr: 2185 case lltok::kw_shufflevector: 2186 case lltok::kw_insertelement: 2187 case lltok::kw_extractelement: 2188 case lltok::kw_select: { 2189 unsigned Opc = Lex.getUIntVal(); 2190 SmallVector<Constant*, 16> Elts; 2191 bool InBounds = false; 2192 Lex.Lex(); 2193 if (Opc == Instruction::GetElementPtr) 2194 InBounds = EatIfPresent(lltok::kw_inbounds); 2195 if (ParseToken(lltok::lparen, "expected '(' in constantexpr") || 2196 ParseGlobalValueVector(Elts) || 2197 ParseToken(lltok::rparen, "expected ')' in constantexpr")) 2198 return true; 2199 2200 if (Opc == Instruction::GetElementPtr) { 2201 if (Elts.size() == 0 || !isa<PointerType>(Elts[0]->getType())) 2202 return Error(ID.Loc, "getelementptr requires pointer operand"); 2203 2204 if (!GetElementPtrInst::getIndexedType(Elts[0]->getType(), 2205 (Value**)(Elts.data() + 1), 2206 Elts.size() - 1)) 2207 return Error(ID.Loc, "invalid indices for getelementptr"); 2208 ID.ConstantVal = InBounds ? 2209 ConstantExpr::getInBoundsGetElementPtr(Elts[0], 2210 Elts.data() + 1, 2211 Elts.size() - 1) : 2212 ConstantExpr::getGetElementPtr(Elts[0], 2213 Elts.data() + 1, Elts.size() - 1); 2214 } else if (Opc == Instruction::Select) { 2215 if (Elts.size() != 3) 2216 return Error(ID.Loc, "expected three operands to select"); 2217 if (const char *Reason = SelectInst::areInvalidOperands(Elts[0], Elts[1], 2218 Elts[2])) 2219 return Error(ID.Loc, Reason); 2220 ID.ConstantVal = ConstantExpr::getSelect(Elts[0], Elts[1], Elts[2]); 2221 } else if (Opc == Instruction::ShuffleVector) { 2222 if (Elts.size() != 3) 2223 return Error(ID.Loc, "expected three operands to shufflevector"); 2224 if (!ShuffleVectorInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2225 return Error(ID.Loc, "invalid operands to shufflevector"); 2226 ID.ConstantVal = 2227 ConstantExpr::getShuffleVector(Elts[0], Elts[1],Elts[2]); 2228 } else if (Opc == Instruction::ExtractElement) { 2229 if (Elts.size() != 2) 2230 return Error(ID.Loc, "expected two operands to extractelement"); 2231 if (!ExtractElementInst::isValidOperands(Elts[0], Elts[1])) 2232 return Error(ID.Loc, "invalid extractelement operands"); 2233 ID.ConstantVal = ConstantExpr::getExtractElement(Elts[0], Elts[1]); 2234 } else { 2235 assert(Opc == Instruction::InsertElement && "Unknown opcode"); 2236 if (Elts.size() != 3) 2237 return Error(ID.Loc, "expected three operands to insertelement"); 2238 if (!InsertElementInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2239 return Error(ID.Loc, "invalid insertelement operands"); 2240 ID.ConstantVal = 2241 ConstantExpr::getInsertElement(Elts[0], Elts[1],Elts[2]); 2242 } 2243 2244 ID.Kind = ValID::t_Constant; 2245 return false; 2246 } 2247 } 2248 2249 Lex.Lex(); 2250 return false; 2251} 2252 2253/// ParseGlobalValue - Parse a global value with the specified type. 2254bool LLParser::ParseGlobalValue(const Type *Ty, Constant *&V) { 2255 V = 0; 2256 ValID ID; 2257 return ParseValID(ID) || 2258 ConvertGlobalValIDToValue(Ty, ID, V); 2259} 2260 2261/// ConvertGlobalValIDToValue - Apply a type to a ValID to get a fully resolved 2262/// constant. 2263bool LLParser::ConvertGlobalValIDToValue(const Type *Ty, ValID &ID, 2264 Constant *&V) { 2265 if (isa<FunctionType>(Ty)) 2266 return Error(ID.Loc, "functions are not values, refer to them as pointers"); 2267 2268 switch (ID.Kind) { 2269 default: llvm_unreachable("Unknown ValID!"); 2270 case ValID::t_Metadata: 2271 return Error(ID.Loc, "invalid use of metadata"); 2272 case ValID::t_LocalID: 2273 case ValID::t_LocalName: 2274 return Error(ID.Loc, "invalid use of function-local name"); 2275 case ValID::t_InlineAsm: 2276 return Error(ID.Loc, "inline asm can only be an operand of call/invoke"); 2277 case ValID::t_GlobalName: 2278 V = GetGlobalVal(ID.StrVal, Ty, ID.Loc); 2279 return V == 0; 2280 case ValID::t_GlobalID: 2281 V = GetGlobalVal(ID.UIntVal, Ty, ID.Loc); 2282 return V == 0; 2283 case ValID::t_APSInt: 2284 if (!isa<IntegerType>(Ty)) 2285 return Error(ID.Loc, "integer constant must have integer type"); 2286 ID.APSIntVal.extOrTrunc(Ty->getPrimitiveSizeInBits()); 2287 V = ConstantInt::get(Context, ID.APSIntVal); 2288 return false; 2289 case ValID::t_APFloat: 2290 if (!Ty->isFloatingPoint() || 2291 !ConstantFP::isValueValidForType(Ty, ID.APFloatVal)) 2292 return Error(ID.Loc, "floating point constant invalid for type"); 2293 2294 // The lexer has no type info, so builds all float and double FP constants 2295 // as double. Fix this here. Long double does not need this. 2296 if (&ID.APFloatVal.getSemantics() == &APFloat::IEEEdouble && 2297 Ty == Type::getFloatTy(Context)) { 2298 bool Ignored; 2299 ID.APFloatVal.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, 2300 &Ignored); 2301 } 2302 V = ConstantFP::get(Context, ID.APFloatVal); 2303 2304 if (V->getType() != Ty) 2305 return Error(ID.Loc, "floating point constant does not have type '" + 2306 Ty->getDescription() + "'"); 2307 2308 return false; 2309 case ValID::t_Null: 2310 if (!isa<PointerType>(Ty)) 2311 return Error(ID.Loc, "null must be a pointer type"); 2312 V = ConstantPointerNull::get(cast<PointerType>(Ty)); 2313 return false; 2314 case ValID::t_Undef: 2315 // FIXME: LabelTy should not be a first-class type. 2316 if ((!Ty->isFirstClassType() || Ty == Type::getLabelTy(Context)) && 2317 !isa<OpaqueType>(Ty)) 2318 return Error(ID.Loc, "invalid type for undef constant"); 2319 V = UndefValue::get(Ty); 2320 return false; 2321 case ValID::t_EmptyArray: 2322 if (!isa<ArrayType>(Ty) || cast<ArrayType>(Ty)->getNumElements() != 0) 2323 return Error(ID.Loc, "invalid empty array initializer"); 2324 V = UndefValue::get(Ty); 2325 return false; 2326 case ValID::t_Zero: 2327 // FIXME: LabelTy should not be a first-class type. 2328 if (!Ty->isFirstClassType() || Ty == Type::getLabelTy(Context)) 2329 return Error(ID.Loc, "invalid type for null constant"); 2330 V = Constant::getNullValue(Ty); 2331 return false; 2332 case ValID::t_Constant: 2333 if (ID.ConstantVal->getType() != Ty) 2334 return Error(ID.Loc, "constant expression type mismatch"); 2335 V = ID.ConstantVal; 2336 return false; 2337 } 2338} 2339 2340bool LLParser::ParseGlobalTypeAndValue(Constant *&V) { 2341 PATypeHolder Type(Type::getVoidTy(Context)); 2342 return ParseType(Type) || 2343 ParseGlobalValue(Type, V); 2344} 2345 2346/// ParseGlobalValueVector 2347/// ::= /*empty*/ 2348/// ::= TypeAndValue (',' TypeAndValue)* 2349bool LLParser::ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts) { 2350 // Empty list. 2351 if (Lex.getKind() == lltok::rbrace || 2352 Lex.getKind() == lltok::rsquare || 2353 Lex.getKind() == lltok::greater || 2354 Lex.getKind() == lltok::rparen) 2355 return false; 2356 2357 Constant *C; 2358 if (ParseGlobalTypeAndValue(C)) return true; 2359 Elts.push_back(C); 2360 2361 while (EatIfPresent(lltok::comma)) { 2362 if (ParseGlobalTypeAndValue(C)) return true; 2363 Elts.push_back(C); 2364 } 2365 2366 return false; 2367} 2368 2369 2370//===----------------------------------------------------------------------===// 2371// Function Parsing. 2372//===----------------------------------------------------------------------===// 2373 2374bool LLParser::ConvertValIDToValue(const Type *Ty, ValID &ID, Value *&V, 2375 PerFunctionState &PFS) { 2376 if (ID.Kind == ValID::t_LocalID) 2377 V = PFS.GetVal(ID.UIntVal, Ty, ID.Loc); 2378 else if (ID.Kind == ValID::t_LocalName) 2379 V = PFS.GetVal(ID.StrVal, Ty, ID.Loc); 2380 else if (ID.Kind == ValID::t_InlineAsm) { 2381 const PointerType *PTy = dyn_cast<PointerType>(Ty); 2382 const FunctionType *FTy = 2383 PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : 0; 2384 if (!FTy || !InlineAsm::Verify(FTy, ID.StrVal2)) 2385 return Error(ID.Loc, "invalid type for inline asm constraint string"); 2386 V = InlineAsm::get(FTy, ID.StrVal, ID.StrVal2, ID.UIntVal); 2387 return false; 2388 } else if (ID.Kind == ValID::t_Metadata) { 2389 V = ID.MetadataVal; 2390 } else { 2391 Constant *C; 2392 if (ConvertGlobalValIDToValue(Ty, ID, C)) return true; 2393 V = C; 2394 return false; 2395 } 2396 2397 return V == 0; 2398} 2399 2400bool LLParser::ParseValue(const Type *Ty, Value *&V, PerFunctionState &PFS) { 2401 V = 0; 2402 ValID ID; 2403 return ParseValID(ID) || 2404 ConvertValIDToValue(Ty, ID, V, PFS); 2405} 2406 2407bool LLParser::ParseTypeAndValue(Value *&V, PerFunctionState &PFS) { 2408 PATypeHolder T(Type::getVoidTy(Context)); 2409 return ParseType(T) || 2410 ParseValue(T, V, PFS); 2411} 2412 2413/// FunctionHeader 2414/// ::= OptionalLinkage OptionalVisibility OptionalCallingConv OptRetAttrs 2415/// Type GlobalName '(' ArgList ')' OptFuncAttrs OptSection 2416/// OptionalAlign OptGC 2417bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) { 2418 // Parse the linkage. 2419 LocTy LinkageLoc = Lex.getLoc(); 2420 unsigned Linkage; 2421 2422 unsigned Visibility, RetAttrs; 2423 CallingConv::ID CC; 2424 PATypeHolder RetType(Type::getVoidTy(Context)); 2425 LocTy RetTypeLoc = Lex.getLoc(); 2426 if (ParseOptionalLinkage(Linkage) || 2427 ParseOptionalVisibility(Visibility) || 2428 ParseOptionalCallingConv(CC) || 2429 ParseOptionalAttrs(RetAttrs, 1) || 2430 ParseType(RetType, RetTypeLoc, true /*void allowed*/)) 2431 return true; 2432 2433 // Verify that the linkage is ok. 2434 switch ((GlobalValue::LinkageTypes)Linkage) { 2435 case GlobalValue::ExternalLinkage: 2436 break; // always ok. 2437 case GlobalValue::DLLImportLinkage: 2438 case GlobalValue::ExternalWeakLinkage: 2439 if (isDefine) 2440 return Error(LinkageLoc, "invalid linkage for function definition"); 2441 break; 2442 case GlobalValue::PrivateLinkage: 2443 case GlobalValue::LinkerPrivateLinkage: 2444 case GlobalValue::InternalLinkage: 2445 case GlobalValue::AvailableExternallyLinkage: 2446 case GlobalValue::LinkOnceAnyLinkage: 2447 case GlobalValue::LinkOnceODRLinkage: 2448 case GlobalValue::WeakAnyLinkage: 2449 case GlobalValue::WeakODRLinkage: 2450 case GlobalValue::DLLExportLinkage: 2451 if (!isDefine) 2452 return Error(LinkageLoc, "invalid linkage for function declaration"); 2453 break; 2454 case GlobalValue::AppendingLinkage: 2455 case GlobalValue::GhostLinkage: 2456 case GlobalValue::CommonLinkage: 2457 return Error(LinkageLoc, "invalid function linkage type"); 2458 } 2459 2460 if (!FunctionType::isValidReturnType(RetType) || 2461 isa<OpaqueType>(RetType)) 2462 return Error(RetTypeLoc, "invalid function return type"); 2463 2464 LocTy NameLoc = Lex.getLoc(); 2465 2466 std::string FunctionName; 2467 if (Lex.getKind() == lltok::GlobalVar) { 2468 FunctionName = Lex.getStrVal(); 2469 } else if (Lex.getKind() == lltok::GlobalID) { // @42 is ok. 2470 unsigned NameID = Lex.getUIntVal(); 2471 2472 if (NameID != NumberedVals.size()) 2473 return TokError("function expected to be numbered '%" + 2474 utostr(NumberedVals.size()) + "'"); 2475 } else { 2476 return TokError("expected function name"); 2477 } 2478 2479 Lex.Lex(); 2480 2481 if (Lex.getKind() != lltok::lparen) 2482 return TokError("expected '(' in function argument list"); 2483 2484 std::vector<ArgInfo> ArgList; 2485 bool isVarArg; 2486 unsigned FuncAttrs; 2487 std::string Section; 2488 unsigned Alignment; 2489 std::string GC; 2490 2491 if (ParseArgumentList(ArgList, isVarArg, false) || 2492 ParseOptionalAttrs(FuncAttrs, 2) || 2493 (EatIfPresent(lltok::kw_section) && 2494 ParseStringConstant(Section)) || 2495 ParseOptionalAlignment(Alignment) || 2496 (EatIfPresent(lltok::kw_gc) && 2497 ParseStringConstant(GC))) 2498 return true; 2499 2500 // If the alignment was parsed as an attribute, move to the alignment field. 2501 if (FuncAttrs & Attribute::Alignment) { 2502 Alignment = Attribute::getAlignmentFromAttrs(FuncAttrs); 2503 FuncAttrs &= ~Attribute::Alignment; 2504 } 2505 2506 // Okay, if we got here, the function is syntactically valid. Convert types 2507 // and do semantic checks. 2508 std::vector<const Type*> ParamTypeList; 2509 SmallVector<AttributeWithIndex, 8> Attrs; 2510 // FIXME : In 3.0, stop accepting zext, sext and inreg as optional function 2511 // attributes. 2512 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 2513 if (FuncAttrs & ObsoleteFuncAttrs) { 2514 RetAttrs |= FuncAttrs & ObsoleteFuncAttrs; 2515 FuncAttrs &= ~ObsoleteFuncAttrs; 2516 } 2517 2518 if (RetAttrs != Attribute::None) 2519 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 2520 2521 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 2522 ParamTypeList.push_back(ArgList[i].Type); 2523 if (ArgList[i].Attrs != Attribute::None) 2524 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 2525 } 2526 2527 if (FuncAttrs != Attribute::None) 2528 Attrs.push_back(AttributeWithIndex::get(~0, FuncAttrs)); 2529 2530 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 2531 2532 if (PAL.paramHasAttr(1, Attribute::StructRet) && 2533 RetType != Type::getVoidTy(Context)) 2534 return Error(RetTypeLoc, "functions with 'sret' argument must return void"); 2535 2536 const FunctionType *FT = 2537 FunctionType::get(RetType, ParamTypeList, isVarArg); 2538 const PointerType *PFT = PointerType::getUnqual(FT); 2539 2540 Fn = 0; 2541 if (!FunctionName.empty()) { 2542 // If this was a definition of a forward reference, remove the definition 2543 // from the forward reference table and fill in the forward ref. 2544 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator FRVI = 2545 ForwardRefVals.find(FunctionName); 2546 if (FRVI != ForwardRefVals.end()) { 2547 Fn = M->getFunction(FunctionName); 2548 ForwardRefVals.erase(FRVI); 2549 } else if ((Fn = M->getFunction(FunctionName))) { 2550 // If this function already exists in the symbol table, then it is 2551 // multiply defined. We accept a few cases for old backwards compat. 2552 // FIXME: Remove this stuff for LLVM 3.0. 2553 if (Fn->getType() != PFT || Fn->getAttributes() != PAL || 2554 (!Fn->isDeclaration() && isDefine)) { 2555 // If the redefinition has different type or different attributes, 2556 // reject it. If both have bodies, reject it. 2557 return Error(NameLoc, "invalid redefinition of function '" + 2558 FunctionName + "'"); 2559 } else if (Fn->isDeclaration()) { 2560 // Make sure to strip off any argument names so we can't get conflicts. 2561 for (Function::arg_iterator AI = Fn->arg_begin(), AE = Fn->arg_end(); 2562 AI != AE; ++AI) 2563 AI->setName(""); 2564 } 2565 } 2566 2567 } else { 2568 // If this is a definition of a forward referenced function, make sure the 2569 // types agree. 2570 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator I 2571 = ForwardRefValIDs.find(NumberedVals.size()); 2572 if (I != ForwardRefValIDs.end()) { 2573 Fn = cast<Function>(I->second.first); 2574 if (Fn->getType() != PFT) 2575 return Error(NameLoc, "type of definition and forward reference of '@" + 2576 utostr(NumberedVals.size()) +"' disagree"); 2577 ForwardRefValIDs.erase(I); 2578 } 2579 } 2580 2581 if (Fn == 0) 2582 Fn = Function::Create(FT, GlobalValue::ExternalLinkage, FunctionName, M); 2583 else // Move the forward-reference to the correct spot in the module. 2584 M->getFunctionList().splice(M->end(), M->getFunctionList(), Fn); 2585 2586 if (FunctionName.empty()) 2587 NumberedVals.push_back(Fn); 2588 2589 Fn->setLinkage((GlobalValue::LinkageTypes)Linkage); 2590 Fn->setVisibility((GlobalValue::VisibilityTypes)Visibility); 2591 Fn->setCallingConv(CC); 2592 Fn->setAttributes(PAL); 2593 Fn->setAlignment(Alignment); 2594 Fn->setSection(Section); 2595 if (!GC.empty()) Fn->setGC(GC.c_str()); 2596 2597 // Add all of the arguments we parsed to the function. 2598 Function::arg_iterator ArgIt = Fn->arg_begin(); 2599 for (unsigned i = 0, e = ArgList.size(); i != e; ++i, ++ArgIt) { 2600 // If the argument has a name, insert it into the argument symbol table. 2601 if (ArgList[i].Name.empty()) continue; 2602 2603 // Set the name, if it conflicted, it will be auto-renamed. 2604 ArgIt->setName(ArgList[i].Name); 2605 2606 if (ArgIt->getNameStr() != ArgList[i].Name) 2607 return Error(ArgList[i].Loc, "redefinition of argument '%" + 2608 ArgList[i].Name + "'"); 2609 } 2610 2611 return false; 2612} 2613 2614 2615/// ParseFunctionBody 2616/// ::= '{' BasicBlock+ '}' 2617/// ::= 'begin' BasicBlock+ 'end' // FIXME: remove in LLVM 3.0 2618/// 2619bool LLParser::ParseFunctionBody(Function &Fn) { 2620 if (Lex.getKind() != lltok::lbrace && Lex.getKind() != lltok::kw_begin) 2621 return TokError("expected '{' in function body"); 2622 Lex.Lex(); // eat the {. 2623 2624 PerFunctionState PFS(*this, Fn); 2625 2626 while (Lex.getKind() != lltok::rbrace && Lex.getKind() != lltok::kw_end) 2627 if (ParseBasicBlock(PFS)) return true; 2628 2629 // Eat the }. 2630 Lex.Lex(); 2631 2632 // Verify function is ok. 2633 return PFS.VerifyFunctionComplete(); 2634} 2635 2636/// ParseBasicBlock 2637/// ::= LabelStr? Instruction* 2638bool LLParser::ParseBasicBlock(PerFunctionState &PFS) { 2639 // If this basic block starts out with a name, remember it. 2640 std::string Name; 2641 LocTy NameLoc = Lex.getLoc(); 2642 if (Lex.getKind() == lltok::LabelStr) { 2643 Name = Lex.getStrVal(); 2644 Lex.Lex(); 2645 } 2646 2647 BasicBlock *BB = PFS.DefineBB(Name, NameLoc); 2648 if (BB == 0) return true; 2649 2650 std::string NameStr; 2651 2652 // Parse the instructions in this block until we get a terminator. 2653 Instruction *Inst; 2654 do { 2655 // This instruction may have three possibilities for a name: a) none 2656 // specified, b) name specified "%foo =", c) number specified: "%4 =". 2657 LocTy NameLoc = Lex.getLoc(); 2658 int NameID = -1; 2659 NameStr = ""; 2660 2661 if (Lex.getKind() == lltok::LocalVarID) { 2662 NameID = Lex.getUIntVal(); 2663 Lex.Lex(); 2664 if (ParseToken(lltok::equal, "expected '=' after instruction id")) 2665 return true; 2666 } else if (Lex.getKind() == lltok::LocalVar || 2667 // FIXME: REMOVE IN LLVM 3.0 2668 Lex.getKind() == lltok::StringConstant) { 2669 NameStr = Lex.getStrVal(); 2670 Lex.Lex(); 2671 if (ParseToken(lltok::equal, "expected '=' after instruction name")) 2672 return true; 2673 } 2674 2675 if (ParseInstruction(Inst, BB, PFS)) return true; 2676 if (EatIfPresent(lltok::comma)) 2677 ParseOptionalDbgInfo(); 2678 2679 // Set metadata attached with this instruction. 2680 Metadata &TheMetadata = M->getContext().getMetadata(); 2681 for (SmallVector<std::pair<MDKindID, MDNode *>, 2>::iterator 2682 MDI = MDsOnInst.begin(), MDE = MDsOnInst.end(); MDI != MDE; ++MDI) 2683 TheMetadata.setMD(MDI->first, MDI->second, Inst); 2684 MDsOnInst.clear(); 2685 2686 BB->getInstList().push_back(Inst); 2687 2688 // Set the name on the instruction. 2689 if (PFS.SetInstName(NameID, NameStr, NameLoc, Inst)) return true; 2690 } while (!isa<TerminatorInst>(Inst)); 2691 2692 return false; 2693} 2694 2695//===----------------------------------------------------------------------===// 2696// Instruction Parsing. 2697//===----------------------------------------------------------------------===// 2698 2699/// ParseInstruction - Parse one of the many different instructions. 2700/// 2701bool LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB, 2702 PerFunctionState &PFS) { 2703 lltok::Kind Token = Lex.getKind(); 2704 if (Token == lltok::Eof) 2705 return TokError("found end of file when expecting more instructions"); 2706 LocTy Loc = Lex.getLoc(); 2707 unsigned KeywordVal = Lex.getUIntVal(); 2708 Lex.Lex(); // Eat the keyword. 2709 2710 switch (Token) { 2711 default: return Error(Loc, "expected instruction opcode"); 2712 // Terminator Instructions. 2713 case lltok::kw_unwind: Inst = new UnwindInst(Context); return false; 2714 case lltok::kw_unreachable: Inst = new UnreachableInst(Context); return false; 2715 case lltok::kw_ret: return ParseRet(Inst, BB, PFS); 2716 case lltok::kw_br: return ParseBr(Inst, PFS); 2717 case lltok::kw_switch: return ParseSwitch(Inst, PFS); 2718 case lltok::kw_invoke: return ParseInvoke(Inst, PFS); 2719 // Binary Operators. 2720 case lltok::kw_add: 2721 case lltok::kw_sub: 2722 case lltok::kw_mul: { 2723 bool NUW = false; 2724 bool NSW = false; 2725 LocTy ModifierLoc = Lex.getLoc(); 2726 if (EatIfPresent(lltok::kw_nuw)) 2727 NUW = true; 2728 if (EatIfPresent(lltok::kw_nsw)) { 2729 NSW = true; 2730 if (EatIfPresent(lltok::kw_nuw)) 2731 NUW = true; 2732 } 2733 // API compatibility: Accept either integer or floating-point types. 2734 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 0); 2735 if (!Result) { 2736 if (!Inst->getType()->isIntOrIntVector()) { 2737 if (NUW) 2738 return Error(ModifierLoc, "nuw only applies to integer operations"); 2739 if (NSW) 2740 return Error(ModifierLoc, "nsw only applies to integer operations"); 2741 } 2742 if (NUW) 2743 cast<BinaryOperator>(Inst)->setHasNoUnsignedWrap(true); 2744 if (NSW) 2745 cast<BinaryOperator>(Inst)->setHasNoSignedWrap(true); 2746 } 2747 return Result; 2748 } 2749 case lltok::kw_fadd: 2750 case lltok::kw_fsub: 2751 case lltok::kw_fmul: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2752 2753 case lltok::kw_sdiv: { 2754 bool Exact = false; 2755 if (EatIfPresent(lltok::kw_exact)) 2756 Exact = true; 2757 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 1); 2758 if (!Result) 2759 if (Exact) 2760 cast<BinaryOperator>(Inst)->setIsExact(true); 2761 return Result; 2762 } 2763 2764 case lltok::kw_udiv: 2765 case lltok::kw_urem: 2766 case lltok::kw_srem: return ParseArithmetic(Inst, PFS, KeywordVal, 1); 2767 case lltok::kw_fdiv: 2768 case lltok::kw_frem: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2769 case lltok::kw_shl: 2770 case lltok::kw_lshr: 2771 case lltok::kw_ashr: 2772 case lltok::kw_and: 2773 case lltok::kw_or: 2774 case lltok::kw_xor: return ParseLogical(Inst, PFS, KeywordVal); 2775 case lltok::kw_icmp: 2776 case lltok::kw_fcmp: return ParseCompare(Inst, PFS, KeywordVal); 2777 // Casts. 2778 case lltok::kw_trunc: 2779 case lltok::kw_zext: 2780 case lltok::kw_sext: 2781 case lltok::kw_fptrunc: 2782 case lltok::kw_fpext: 2783 case lltok::kw_bitcast: 2784 case lltok::kw_uitofp: 2785 case lltok::kw_sitofp: 2786 case lltok::kw_fptoui: 2787 case lltok::kw_fptosi: 2788 case lltok::kw_inttoptr: 2789 case lltok::kw_ptrtoint: return ParseCast(Inst, PFS, KeywordVal); 2790 // Other. 2791 case lltok::kw_select: return ParseSelect(Inst, PFS); 2792 case lltok::kw_va_arg: return ParseVA_Arg(Inst, PFS); 2793 case lltok::kw_extractelement: return ParseExtractElement(Inst, PFS); 2794 case lltok::kw_insertelement: return ParseInsertElement(Inst, PFS); 2795 case lltok::kw_shufflevector: return ParseShuffleVector(Inst, PFS); 2796 case lltok::kw_phi: return ParsePHI(Inst, PFS); 2797 case lltok::kw_call: return ParseCall(Inst, PFS, false); 2798 case lltok::kw_tail: return ParseCall(Inst, PFS, true); 2799 // Memory. 2800 case lltok::kw_alloca: return ParseAlloc(Inst, PFS); 2801 case lltok::kw_malloc: return ParseAlloc(Inst, PFS, BB, false); 2802 case lltok::kw_free: return ParseFree(Inst, PFS); 2803 case lltok::kw_load: return ParseLoad(Inst, PFS, false); 2804 case lltok::kw_store: return ParseStore(Inst, PFS, false); 2805 case lltok::kw_volatile: 2806 if (EatIfPresent(lltok::kw_load)) 2807 return ParseLoad(Inst, PFS, true); 2808 else if (EatIfPresent(lltok::kw_store)) 2809 return ParseStore(Inst, PFS, true); 2810 else 2811 return TokError("expected 'load' or 'store'"); 2812 case lltok::kw_getresult: return ParseGetResult(Inst, PFS); 2813 case lltok::kw_getelementptr: return ParseGetElementPtr(Inst, PFS); 2814 case lltok::kw_extractvalue: return ParseExtractValue(Inst, PFS); 2815 case lltok::kw_insertvalue: return ParseInsertValue(Inst, PFS); 2816 } 2817} 2818 2819/// ParseCmpPredicate - Parse an integer or fp predicate, based on Kind. 2820bool LLParser::ParseCmpPredicate(unsigned &P, unsigned Opc) { 2821 if (Opc == Instruction::FCmp) { 2822 switch (Lex.getKind()) { 2823 default: TokError("expected fcmp predicate (e.g. 'oeq')"); 2824 case lltok::kw_oeq: P = CmpInst::FCMP_OEQ; break; 2825 case lltok::kw_one: P = CmpInst::FCMP_ONE; break; 2826 case lltok::kw_olt: P = CmpInst::FCMP_OLT; break; 2827 case lltok::kw_ogt: P = CmpInst::FCMP_OGT; break; 2828 case lltok::kw_ole: P = CmpInst::FCMP_OLE; break; 2829 case lltok::kw_oge: P = CmpInst::FCMP_OGE; break; 2830 case lltok::kw_ord: P = CmpInst::FCMP_ORD; break; 2831 case lltok::kw_uno: P = CmpInst::FCMP_UNO; break; 2832 case lltok::kw_ueq: P = CmpInst::FCMP_UEQ; break; 2833 case lltok::kw_une: P = CmpInst::FCMP_UNE; break; 2834 case lltok::kw_ult: P = CmpInst::FCMP_ULT; break; 2835 case lltok::kw_ugt: P = CmpInst::FCMP_UGT; break; 2836 case lltok::kw_ule: P = CmpInst::FCMP_ULE; break; 2837 case lltok::kw_uge: P = CmpInst::FCMP_UGE; break; 2838 case lltok::kw_true: P = CmpInst::FCMP_TRUE; break; 2839 case lltok::kw_false: P = CmpInst::FCMP_FALSE; break; 2840 } 2841 } else { 2842 switch (Lex.getKind()) { 2843 default: TokError("expected icmp predicate (e.g. 'eq')"); 2844 case lltok::kw_eq: P = CmpInst::ICMP_EQ; break; 2845 case lltok::kw_ne: P = CmpInst::ICMP_NE; break; 2846 case lltok::kw_slt: P = CmpInst::ICMP_SLT; break; 2847 case lltok::kw_sgt: P = CmpInst::ICMP_SGT; break; 2848 case lltok::kw_sle: P = CmpInst::ICMP_SLE; break; 2849 case lltok::kw_sge: P = CmpInst::ICMP_SGE; break; 2850 case lltok::kw_ult: P = CmpInst::ICMP_ULT; break; 2851 case lltok::kw_ugt: P = CmpInst::ICMP_UGT; break; 2852 case lltok::kw_ule: P = CmpInst::ICMP_ULE; break; 2853 case lltok::kw_uge: P = CmpInst::ICMP_UGE; break; 2854 } 2855 } 2856 Lex.Lex(); 2857 return false; 2858} 2859 2860//===----------------------------------------------------------------------===// 2861// Terminator Instructions. 2862//===----------------------------------------------------------------------===// 2863 2864/// ParseRet - Parse a return instruction. 2865/// ::= 'ret' void (',' 'dbg' !1) 2866/// ::= 'ret' TypeAndValue (',' 'dbg' !1) 2867/// ::= 'ret' TypeAndValue (',' TypeAndValue)+ (',' 'dbg' !1) 2868/// [[obsolete: LLVM 3.0]] 2869bool LLParser::ParseRet(Instruction *&Inst, BasicBlock *BB, 2870 PerFunctionState &PFS) { 2871 PATypeHolder Ty(Type::getVoidTy(Context)); 2872 if (ParseType(Ty, true /*void allowed*/)) return true; 2873 2874 if (Ty == Type::getVoidTy(Context)) { 2875 if (EatIfPresent(lltok::comma)) 2876 if (ParseOptionalDbgInfo()) return true; 2877 Inst = ReturnInst::Create(Context); 2878 return false; 2879 } 2880 2881 Value *RV; 2882 if (ParseValue(Ty, RV, PFS)) return true; 2883 2884 if (EatIfPresent(lltok::comma)) { 2885 // Parse optional 'dbg' 2886 if (Lex.getKind() == lltok::kw_dbg) { 2887 if (ParseOptionalDbgInfo()) return true; 2888 } else { 2889 // The normal case is one return value. 2890 // FIXME: LLVM 3.0 remove MRV support for 'ret i32 1, i32 2', requiring use 2891 // of 'ret {i32,i32} {i32 1, i32 2}' 2892 SmallVector<Value*, 8> RVs; 2893 RVs.push_back(RV); 2894 2895 do { 2896 // If optional 'dbg' is seen then this is the end of MRV. 2897 if (Lex.getKind() == lltok::kw_dbg) 2898 break; 2899 if (ParseTypeAndValue(RV, PFS)) return true; 2900 RVs.push_back(RV); 2901 } while (EatIfPresent(lltok::comma)); 2902 2903 RV = UndefValue::get(PFS.getFunction().getReturnType()); 2904 for (unsigned i = 0, e = RVs.size(); i != e; ++i) { 2905 Instruction *I = InsertValueInst::Create(RV, RVs[i], i, "mrv"); 2906 BB->getInstList().push_back(I); 2907 RV = I; 2908 } 2909 } 2910 } 2911 if (EatIfPresent(lltok::comma)) 2912 if (ParseOptionalDbgInfo()) return true; 2913 2914 Inst = ReturnInst::Create(Context, RV); 2915 return false; 2916} 2917 2918 2919/// ParseBr 2920/// ::= 'br' TypeAndValue 2921/// ::= 'br' TypeAndValue ',' TypeAndValue ',' TypeAndValue 2922bool LLParser::ParseBr(Instruction *&Inst, PerFunctionState &PFS) { 2923 LocTy Loc, Loc2; 2924 Value *Op0, *Op1, *Op2; 2925 if (ParseTypeAndValue(Op0, Loc, PFS)) return true; 2926 2927 if (BasicBlock *BB = dyn_cast<BasicBlock>(Op0)) { 2928 Inst = BranchInst::Create(BB); 2929 return false; 2930 } 2931 2932 if (Op0->getType() != Type::getInt1Ty(Context)) 2933 return Error(Loc, "branch condition must have 'i1' type"); 2934 2935 if (ParseToken(lltok::comma, "expected ',' after branch condition") || 2936 ParseTypeAndValue(Op1, Loc, PFS) || 2937 ParseToken(lltok::comma, "expected ',' after true destination") || 2938 ParseTypeAndValue(Op2, Loc2, PFS)) 2939 return true; 2940 2941 if (!isa<BasicBlock>(Op1)) 2942 return Error(Loc, "true destination of branch must be a basic block"); 2943 if (!isa<BasicBlock>(Op2)) 2944 return Error(Loc2, "true destination of branch must be a basic block"); 2945 2946 Inst = BranchInst::Create(cast<BasicBlock>(Op1), cast<BasicBlock>(Op2), Op0); 2947 return false; 2948} 2949 2950/// ParseSwitch 2951/// Instruction 2952/// ::= 'switch' TypeAndValue ',' TypeAndValue '[' JumpTable ']' 2953/// JumpTable 2954/// ::= (TypeAndValue ',' TypeAndValue)* 2955bool LLParser::ParseSwitch(Instruction *&Inst, PerFunctionState &PFS) { 2956 LocTy CondLoc, BBLoc; 2957 Value *Cond, *DefaultBB; 2958 if (ParseTypeAndValue(Cond, CondLoc, PFS) || 2959 ParseToken(lltok::comma, "expected ',' after switch condition") || 2960 ParseTypeAndValue(DefaultBB, BBLoc, PFS) || 2961 ParseToken(lltok::lsquare, "expected '[' with switch table")) 2962 return true; 2963 2964 if (!isa<IntegerType>(Cond->getType())) 2965 return Error(CondLoc, "switch condition must have integer type"); 2966 if (!isa<BasicBlock>(DefaultBB)) 2967 return Error(BBLoc, "default destination must be a basic block"); 2968 2969 // Parse the jump table pairs. 2970 SmallPtrSet<Value*, 32> SeenCases; 2971 SmallVector<std::pair<ConstantInt*, BasicBlock*>, 32> Table; 2972 while (Lex.getKind() != lltok::rsquare) { 2973 Value *Constant, *DestBB; 2974 2975 if (ParseTypeAndValue(Constant, CondLoc, PFS) || 2976 ParseToken(lltok::comma, "expected ',' after case value") || 2977 ParseTypeAndValue(DestBB, BBLoc, PFS)) 2978 return true; 2979 2980 if (!SeenCases.insert(Constant)) 2981 return Error(CondLoc, "duplicate case value in switch"); 2982 if (!isa<ConstantInt>(Constant)) 2983 return Error(CondLoc, "case value is not a constant integer"); 2984 if (!isa<BasicBlock>(DestBB)) 2985 return Error(BBLoc, "case destination is not a basic block"); 2986 2987 Table.push_back(std::make_pair(cast<ConstantInt>(Constant), 2988 cast<BasicBlock>(DestBB))); 2989 } 2990 2991 Lex.Lex(); // Eat the ']'. 2992 2993 SwitchInst *SI = SwitchInst::Create(Cond, cast<BasicBlock>(DefaultBB), 2994 Table.size()); 2995 for (unsigned i = 0, e = Table.size(); i != e; ++i) 2996 SI->addCase(Table[i].first, Table[i].second); 2997 Inst = SI; 2998 return false; 2999} 3000 3001/// ParseInvoke 3002/// ::= 'invoke' OptionalCallingConv OptionalAttrs Type Value ParamList 3003/// OptionalAttrs 'to' TypeAndValue 'unwind' TypeAndValue 3004bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) { 3005 LocTy CallLoc = Lex.getLoc(); 3006 unsigned RetAttrs, FnAttrs; 3007 CallingConv::ID CC; 3008 PATypeHolder RetType(Type::getVoidTy(Context)); 3009 LocTy RetTypeLoc; 3010 ValID CalleeID; 3011 SmallVector<ParamInfo, 16> ArgList; 3012 3013 Value *NormalBB, *UnwindBB; 3014 if (ParseOptionalCallingConv(CC) || 3015 ParseOptionalAttrs(RetAttrs, 1) || 3016 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3017 ParseValID(CalleeID) || 3018 ParseParameterList(ArgList, PFS) || 3019 ParseOptionalAttrs(FnAttrs, 2) || 3020 ParseToken(lltok::kw_to, "expected 'to' in invoke") || 3021 ParseTypeAndValue(NormalBB, PFS) || 3022 ParseToken(lltok::kw_unwind, "expected 'unwind' in invoke") || 3023 ParseTypeAndValue(UnwindBB, PFS)) 3024 return true; 3025 3026 if (!isa<BasicBlock>(NormalBB)) 3027 return Error(CallLoc, "normal destination is not a basic block"); 3028 if (!isa<BasicBlock>(UnwindBB)) 3029 return Error(CallLoc, "unwind destination is not a basic block"); 3030 3031 // If RetType is a non-function pointer type, then this is the short syntax 3032 // for the call, which means that RetType is just the return type. Infer the 3033 // rest of the function argument types from the arguments that are present. 3034 const PointerType *PFTy = 0; 3035 const FunctionType *Ty = 0; 3036 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3037 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3038 // Pull out the types of all of the arguments... 3039 std::vector<const Type*> ParamTypes; 3040 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3041 ParamTypes.push_back(ArgList[i].V->getType()); 3042 3043 if (!FunctionType::isValidReturnType(RetType)) 3044 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3045 3046 Ty = FunctionType::get(RetType, ParamTypes, false); 3047 PFTy = PointerType::getUnqual(Ty); 3048 } 3049 3050 // Look up the callee. 3051 Value *Callee; 3052 if (ConvertValIDToValue(PFTy, CalleeID, Callee, PFS)) return true; 3053 3054 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 3055 // function attributes. 3056 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 3057 if (FnAttrs & ObsoleteFuncAttrs) { 3058 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 3059 FnAttrs &= ~ObsoleteFuncAttrs; 3060 } 3061 3062 // Set up the Attributes for the function. 3063 SmallVector<AttributeWithIndex, 8> Attrs; 3064 if (RetAttrs != Attribute::None) 3065 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3066 3067 SmallVector<Value*, 8> Args; 3068 3069 // Loop through FunctionType's arguments and ensure they are specified 3070 // correctly. Also, gather any parameter attributes. 3071 FunctionType::param_iterator I = Ty->param_begin(); 3072 FunctionType::param_iterator E = Ty->param_end(); 3073 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3074 const Type *ExpectedTy = 0; 3075 if (I != E) { 3076 ExpectedTy = *I++; 3077 } else if (!Ty->isVarArg()) { 3078 return Error(ArgList[i].Loc, "too many arguments specified"); 3079 } 3080 3081 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3082 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3083 ExpectedTy->getDescription() + "'"); 3084 Args.push_back(ArgList[i].V); 3085 if (ArgList[i].Attrs != Attribute::None) 3086 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3087 } 3088 3089 if (I != E) 3090 return Error(CallLoc, "not enough parameters specified for call"); 3091 3092 if (FnAttrs != Attribute::None) 3093 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3094 3095 // Finish off the Attributes and check them 3096 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3097 3098 InvokeInst *II = InvokeInst::Create(Callee, cast<BasicBlock>(NormalBB), 3099 cast<BasicBlock>(UnwindBB), 3100 Args.begin(), Args.end()); 3101 II->setCallingConv(CC); 3102 II->setAttributes(PAL); 3103 Inst = II; 3104 return false; 3105} 3106 3107 3108 3109//===----------------------------------------------------------------------===// 3110// Binary Operators. 3111//===----------------------------------------------------------------------===// 3112 3113/// ParseArithmetic 3114/// ::= ArithmeticOps TypeAndValue ',' Value 3115/// 3116/// If OperandType is 0, then any FP or integer operand is allowed. If it is 1, 3117/// then any integer operand is allowed, if it is 2, any fp operand is allowed. 3118bool LLParser::ParseArithmetic(Instruction *&Inst, PerFunctionState &PFS, 3119 unsigned Opc, unsigned OperandType) { 3120 LocTy Loc; Value *LHS, *RHS; 3121 if (ParseTypeAndValue(LHS, Loc, PFS) || 3122 ParseToken(lltok::comma, "expected ',' in arithmetic operation") || 3123 ParseValue(LHS->getType(), RHS, PFS)) 3124 return true; 3125 3126 bool Valid; 3127 switch (OperandType) { 3128 default: llvm_unreachable("Unknown operand type!"); 3129 case 0: // int or FP. 3130 Valid = LHS->getType()->isIntOrIntVector() || 3131 LHS->getType()->isFPOrFPVector(); 3132 break; 3133 case 1: Valid = LHS->getType()->isIntOrIntVector(); break; 3134 case 2: Valid = LHS->getType()->isFPOrFPVector(); break; 3135 } 3136 3137 if (!Valid) 3138 return Error(Loc, "invalid operand type for instruction"); 3139 3140 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3141 return false; 3142} 3143 3144/// ParseLogical 3145/// ::= ArithmeticOps TypeAndValue ',' Value { 3146bool LLParser::ParseLogical(Instruction *&Inst, PerFunctionState &PFS, 3147 unsigned Opc) { 3148 LocTy Loc; Value *LHS, *RHS; 3149 if (ParseTypeAndValue(LHS, Loc, PFS) || 3150 ParseToken(lltok::comma, "expected ',' in logical operation") || 3151 ParseValue(LHS->getType(), RHS, PFS)) 3152 return true; 3153 3154 if (!LHS->getType()->isIntOrIntVector()) 3155 return Error(Loc,"instruction requires integer or integer vector operands"); 3156 3157 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3158 return false; 3159} 3160 3161 3162/// ParseCompare 3163/// ::= 'icmp' IPredicates TypeAndValue ',' Value 3164/// ::= 'fcmp' FPredicates TypeAndValue ',' Value 3165bool LLParser::ParseCompare(Instruction *&Inst, PerFunctionState &PFS, 3166 unsigned Opc) { 3167 // Parse the integer/fp comparison predicate. 3168 LocTy Loc; 3169 unsigned Pred; 3170 Value *LHS, *RHS; 3171 if (ParseCmpPredicate(Pred, Opc) || 3172 ParseTypeAndValue(LHS, Loc, PFS) || 3173 ParseToken(lltok::comma, "expected ',' after compare value") || 3174 ParseValue(LHS->getType(), RHS, PFS)) 3175 return true; 3176 3177 if (Opc == Instruction::FCmp) { 3178 if (!LHS->getType()->isFPOrFPVector()) 3179 return Error(Loc, "fcmp requires floating point operands"); 3180 Inst = new FCmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3181 } else { 3182 assert(Opc == Instruction::ICmp && "Unknown opcode for CmpInst!"); 3183 if (!LHS->getType()->isIntOrIntVector() && 3184 !isa<PointerType>(LHS->getType())) 3185 return Error(Loc, "icmp requires integer operands"); 3186 Inst = new ICmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3187 } 3188 return false; 3189} 3190 3191//===----------------------------------------------------------------------===// 3192// Other Instructions. 3193//===----------------------------------------------------------------------===// 3194 3195 3196/// ParseCast 3197/// ::= CastOpc TypeAndValue 'to' Type 3198bool LLParser::ParseCast(Instruction *&Inst, PerFunctionState &PFS, 3199 unsigned Opc) { 3200 LocTy Loc; Value *Op; 3201 PATypeHolder DestTy(Type::getVoidTy(Context)); 3202 if (ParseTypeAndValue(Op, Loc, PFS) || 3203 ParseToken(lltok::kw_to, "expected 'to' after cast value") || 3204 ParseType(DestTy)) 3205 return true; 3206 3207 if (!CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy)) { 3208 CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy); 3209 return Error(Loc, "invalid cast opcode for cast from '" + 3210 Op->getType()->getDescription() + "' to '" + 3211 DestTy->getDescription() + "'"); 3212 } 3213 Inst = CastInst::Create((Instruction::CastOps)Opc, Op, DestTy); 3214 return false; 3215} 3216 3217/// ParseSelect 3218/// ::= 'select' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3219bool LLParser::ParseSelect(Instruction *&Inst, PerFunctionState &PFS) { 3220 LocTy Loc; 3221 Value *Op0, *Op1, *Op2; 3222 if (ParseTypeAndValue(Op0, Loc, PFS) || 3223 ParseToken(lltok::comma, "expected ',' after select condition") || 3224 ParseTypeAndValue(Op1, PFS) || 3225 ParseToken(lltok::comma, "expected ',' after select value") || 3226 ParseTypeAndValue(Op2, PFS)) 3227 return true; 3228 3229 if (const char *Reason = SelectInst::areInvalidOperands(Op0, Op1, Op2)) 3230 return Error(Loc, Reason); 3231 3232 Inst = SelectInst::Create(Op0, Op1, Op2); 3233 return false; 3234} 3235 3236/// ParseVA_Arg 3237/// ::= 'va_arg' TypeAndValue ',' Type 3238bool LLParser::ParseVA_Arg(Instruction *&Inst, PerFunctionState &PFS) { 3239 Value *Op; 3240 PATypeHolder EltTy(Type::getVoidTy(Context)); 3241 LocTy TypeLoc; 3242 if (ParseTypeAndValue(Op, PFS) || 3243 ParseToken(lltok::comma, "expected ',' after vaarg operand") || 3244 ParseType(EltTy, TypeLoc)) 3245 return true; 3246 3247 if (!EltTy->isFirstClassType()) 3248 return Error(TypeLoc, "va_arg requires operand with first class type"); 3249 3250 Inst = new VAArgInst(Op, EltTy); 3251 return false; 3252} 3253 3254/// ParseExtractElement 3255/// ::= 'extractelement' TypeAndValue ',' TypeAndValue 3256bool LLParser::ParseExtractElement(Instruction *&Inst, PerFunctionState &PFS) { 3257 LocTy Loc; 3258 Value *Op0, *Op1; 3259 if (ParseTypeAndValue(Op0, Loc, PFS) || 3260 ParseToken(lltok::comma, "expected ',' after extract value") || 3261 ParseTypeAndValue(Op1, PFS)) 3262 return true; 3263 3264 if (!ExtractElementInst::isValidOperands(Op0, Op1)) 3265 return Error(Loc, "invalid extractelement operands"); 3266 3267 Inst = ExtractElementInst::Create(Op0, Op1); 3268 return false; 3269} 3270 3271/// ParseInsertElement 3272/// ::= 'insertelement' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3273bool LLParser::ParseInsertElement(Instruction *&Inst, PerFunctionState &PFS) { 3274 LocTy Loc; 3275 Value *Op0, *Op1, *Op2; 3276 if (ParseTypeAndValue(Op0, Loc, PFS) || 3277 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3278 ParseTypeAndValue(Op1, PFS) || 3279 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3280 ParseTypeAndValue(Op2, PFS)) 3281 return true; 3282 3283 if (!InsertElementInst::isValidOperands(Op0, Op1, Op2)) 3284 return Error(Loc, "invalid insertelement operands"); 3285 3286 Inst = InsertElementInst::Create(Op0, Op1, Op2); 3287 return false; 3288} 3289 3290/// ParseShuffleVector 3291/// ::= 'shufflevector' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3292bool LLParser::ParseShuffleVector(Instruction *&Inst, PerFunctionState &PFS) { 3293 LocTy Loc; 3294 Value *Op0, *Op1, *Op2; 3295 if (ParseTypeAndValue(Op0, Loc, PFS) || 3296 ParseToken(lltok::comma, "expected ',' after shuffle mask") || 3297 ParseTypeAndValue(Op1, PFS) || 3298 ParseToken(lltok::comma, "expected ',' after shuffle value") || 3299 ParseTypeAndValue(Op2, PFS)) 3300 return true; 3301 3302 if (!ShuffleVectorInst::isValidOperands(Op0, Op1, Op2)) 3303 return Error(Loc, "invalid extractelement operands"); 3304 3305 Inst = new ShuffleVectorInst(Op0, Op1, Op2); 3306 return false; 3307} 3308 3309/// ParsePHI 3310/// ::= 'phi' Type '[' Value ',' Value ']' (',' '[' Value ',' Valueß ']')* 3311bool LLParser::ParsePHI(Instruction *&Inst, PerFunctionState &PFS) { 3312 PATypeHolder Ty(Type::getVoidTy(Context)); 3313 Value *Op0, *Op1; 3314 LocTy TypeLoc = Lex.getLoc(); 3315 3316 if (ParseType(Ty) || 3317 ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3318 ParseValue(Ty, Op0, PFS) || 3319 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3320 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3321 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3322 return true; 3323 3324 SmallVector<std::pair<Value*, BasicBlock*>, 16> PHIVals; 3325 while (1) { 3326 PHIVals.push_back(std::make_pair(Op0, cast<BasicBlock>(Op1))); 3327 3328 if (!EatIfPresent(lltok::comma)) 3329 break; 3330 3331 if (ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3332 ParseValue(Ty, Op0, PFS) || 3333 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3334 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3335 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3336 return true; 3337 } 3338 3339 if (!Ty->isFirstClassType()) 3340 return Error(TypeLoc, "phi node must have first class type"); 3341 3342 PHINode *PN = PHINode::Create(Ty); 3343 PN->reserveOperandSpace(PHIVals.size()); 3344 for (unsigned i = 0, e = PHIVals.size(); i != e; ++i) 3345 PN->addIncoming(PHIVals[i].first, PHIVals[i].second); 3346 Inst = PN; 3347 return false; 3348} 3349 3350/// ParseCall 3351/// ::= 'tail'? 'call' OptionalCallingConv OptionalAttrs Type Value 3352/// ParameterList OptionalAttrs 3353bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS, 3354 bool isTail) { 3355 unsigned RetAttrs, FnAttrs; 3356 CallingConv::ID CC; 3357 PATypeHolder RetType(Type::getVoidTy(Context)); 3358 LocTy RetTypeLoc; 3359 ValID CalleeID; 3360 SmallVector<ParamInfo, 16> ArgList; 3361 LocTy CallLoc = Lex.getLoc(); 3362 3363 if ((isTail && ParseToken(lltok::kw_call, "expected 'tail call'")) || 3364 ParseOptionalCallingConv(CC) || 3365 ParseOptionalAttrs(RetAttrs, 1) || 3366 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3367 ParseValID(CalleeID) || 3368 ParseParameterList(ArgList, PFS) || 3369 ParseOptionalAttrs(FnAttrs, 2)) 3370 return true; 3371 3372 // If RetType is a non-function pointer type, then this is the short syntax 3373 // for the call, which means that RetType is just the return type. Infer the 3374 // rest of the function argument types from the arguments that are present. 3375 const PointerType *PFTy = 0; 3376 const FunctionType *Ty = 0; 3377 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3378 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3379 // Pull out the types of all of the arguments... 3380 std::vector<const Type*> ParamTypes; 3381 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3382 ParamTypes.push_back(ArgList[i].V->getType()); 3383 3384 if (!FunctionType::isValidReturnType(RetType)) 3385 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3386 3387 Ty = FunctionType::get(RetType, ParamTypes, false); 3388 PFTy = PointerType::getUnqual(Ty); 3389 } 3390 3391 // Look up the callee. 3392 Value *Callee; 3393 if (ConvertValIDToValue(PFTy, CalleeID, Callee, PFS)) return true; 3394 3395 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 3396 // function attributes. 3397 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 3398 if (FnAttrs & ObsoleteFuncAttrs) { 3399 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 3400 FnAttrs &= ~ObsoleteFuncAttrs; 3401 } 3402 3403 // Set up the Attributes for the function. 3404 SmallVector<AttributeWithIndex, 8> Attrs; 3405 if (RetAttrs != Attribute::None) 3406 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3407 3408 SmallVector<Value*, 8> Args; 3409 3410 // Loop through FunctionType's arguments and ensure they are specified 3411 // correctly. Also, gather any parameter attributes. 3412 FunctionType::param_iterator I = Ty->param_begin(); 3413 FunctionType::param_iterator E = Ty->param_end(); 3414 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3415 const Type *ExpectedTy = 0; 3416 if (I != E) { 3417 ExpectedTy = *I++; 3418 } else if (!Ty->isVarArg()) { 3419 return Error(ArgList[i].Loc, "too many arguments specified"); 3420 } 3421 3422 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3423 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3424 ExpectedTy->getDescription() + "'"); 3425 Args.push_back(ArgList[i].V); 3426 if (ArgList[i].Attrs != Attribute::None) 3427 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3428 } 3429 3430 if (I != E) 3431 return Error(CallLoc, "not enough parameters specified for call"); 3432 3433 if (FnAttrs != Attribute::None) 3434 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3435 3436 // Finish off the Attributes and check them 3437 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3438 3439 CallInst *CI = CallInst::Create(Callee, Args.begin(), Args.end()); 3440 CI->setTailCall(isTail); 3441 CI->setCallingConv(CC); 3442 CI->setAttributes(PAL); 3443 Inst = CI; 3444 return false; 3445} 3446 3447//===----------------------------------------------------------------------===// 3448// Memory Instructions. 3449//===----------------------------------------------------------------------===// 3450 3451/// ParseAlloc 3452/// ::= 'malloc' Type (',' TypeAndValue)? (',' OptionalInfo)? 3453/// ::= 'alloca' Type (',' TypeAndValue)? (',' OptionalInfo)? 3454bool LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS, 3455 BasicBlock* BB, bool isAlloca) { 3456 PATypeHolder Ty(Type::getVoidTy(Context)); 3457 Value *Size = 0; 3458 LocTy SizeLoc; 3459 unsigned Alignment = 0; 3460 if (ParseType(Ty)) return true; 3461 3462 if (EatIfPresent(lltok::comma)) { 3463 if (Lex.getKind() == lltok::kw_align || Lex.getKind() == lltok::kw_dbg) { 3464 if (ParseOptionalInfo(Alignment)) return true; 3465 } else { 3466 if (ParseTypeAndValue(Size, SizeLoc, PFS)) return true; 3467 if (EatIfPresent(lltok::comma)) 3468 if (ParseOptionalInfo(Alignment)) return true; 3469 } 3470 } 3471 3472 if (Size && Size->getType() != Type::getInt32Ty(Context)) 3473 return Error(SizeLoc, "element count must be i32"); 3474 3475 if (isAlloca) 3476 Inst = new AllocaInst(Ty, Size, Alignment); 3477 else { 3478 // Autoupgrade old malloc instruction to malloc call. 3479 const Type* IntPtrTy = Type::getInt32Ty(Context); 3480 const Type* Int8PtrTy = PointerType::getUnqual(Type::getInt8Ty(Context)); 3481 if (!MallocF) 3482 // Prototype malloc as "void *autoupgrade_malloc(int32)". 3483 MallocF = cast<Function>(M->getOrInsertFunction("autoupgrade_malloc", 3484 Int8PtrTy, IntPtrTy, NULL)); 3485 // "autoupgrade_malloc" updated to "malloc" in ValidateEndOfModule(). 3486 3487 Inst = cast<Instruction>(CallInst::CreateMalloc(BB, IntPtrTy, Ty, 3488 Size, MallocF)); 3489 } 3490 return false; 3491} 3492 3493/// ParseFree 3494/// ::= 'free' TypeAndValue 3495bool LLParser::ParseFree(Instruction *&Inst, PerFunctionState &PFS) { 3496 Value *Val; LocTy Loc; 3497 if (ParseTypeAndValue(Val, Loc, PFS)) return true; 3498 if (!isa<PointerType>(Val->getType())) 3499 return Error(Loc, "operand to free must be a pointer"); 3500 Inst = new FreeInst(Val); 3501 return false; 3502} 3503 3504/// ParseLoad 3505/// ::= 'volatile'? 'load' TypeAndValue (',' OptionalInfo)? 3506bool LLParser::ParseLoad(Instruction *&Inst, PerFunctionState &PFS, 3507 bool isVolatile) { 3508 Value *Val; LocTy Loc; 3509 unsigned Alignment = 0; 3510 if (ParseTypeAndValue(Val, Loc, PFS)) return true; 3511 3512 if (EatIfPresent(lltok::comma)) 3513 if (ParseOptionalInfo(Alignment)) return true; 3514 3515 if (!isa<PointerType>(Val->getType()) || 3516 !cast<PointerType>(Val->getType())->getElementType()->isFirstClassType()) 3517 return Error(Loc, "load operand must be a pointer to a first class type"); 3518 3519 Inst = new LoadInst(Val, "", isVolatile, Alignment); 3520 return false; 3521} 3522 3523/// ParseStore 3524/// ::= 'volatile'? 'store' TypeAndValue ',' TypeAndValue (',' 'align' i32)? 3525bool LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS, 3526 bool isVolatile) { 3527 Value *Val, *Ptr; LocTy Loc, PtrLoc; 3528 unsigned Alignment = 0; 3529 if (ParseTypeAndValue(Val, Loc, PFS) || 3530 ParseToken(lltok::comma, "expected ',' after store operand") || 3531 ParseTypeAndValue(Ptr, PtrLoc, PFS)) 3532 return true; 3533 3534 if (EatIfPresent(lltok::comma)) 3535 if (ParseOptionalInfo(Alignment)) return true; 3536 3537 if (!isa<PointerType>(Ptr->getType())) 3538 return Error(PtrLoc, "store operand must be a pointer"); 3539 if (!Val->getType()->isFirstClassType()) 3540 return Error(Loc, "store operand must be a first class value"); 3541 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType()) 3542 return Error(Loc, "stored value and pointer type do not match"); 3543 3544 Inst = new StoreInst(Val, Ptr, isVolatile, Alignment); 3545 return false; 3546} 3547 3548/// ParseGetResult 3549/// ::= 'getresult' TypeAndValue ',' i32 3550/// FIXME: Remove support for getresult in LLVM 3.0 3551bool LLParser::ParseGetResult(Instruction *&Inst, PerFunctionState &PFS) { 3552 Value *Val; LocTy ValLoc, EltLoc; 3553 unsigned Element; 3554 if (ParseTypeAndValue(Val, ValLoc, PFS) || 3555 ParseToken(lltok::comma, "expected ',' after getresult operand") || 3556 ParseUInt32(Element, EltLoc)) 3557 return true; 3558 3559 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 3560 return Error(ValLoc, "getresult inst requires an aggregate operand"); 3561 if (!ExtractValueInst::getIndexedType(Val->getType(), Element)) 3562 return Error(EltLoc, "invalid getresult index for value"); 3563 Inst = ExtractValueInst::Create(Val, Element); 3564 return false; 3565} 3566 3567/// ParseGetElementPtr 3568/// ::= 'getelementptr' 'inbounds'? TypeAndValue (',' TypeAndValue)* 3569bool LLParser::ParseGetElementPtr(Instruction *&Inst, PerFunctionState &PFS) { 3570 Value *Ptr, *Val; LocTy Loc, EltLoc; 3571 3572 bool InBounds = EatIfPresent(lltok::kw_inbounds); 3573 3574 if (ParseTypeAndValue(Ptr, Loc, PFS)) return true; 3575 3576 if (!isa<PointerType>(Ptr->getType())) 3577 return Error(Loc, "base of getelementptr must be a pointer"); 3578 3579 SmallVector<Value*, 16> Indices; 3580 while (EatIfPresent(lltok::comma)) { 3581 if (ParseTypeAndValue(Val, EltLoc, PFS)) return true; 3582 if (!isa<IntegerType>(Val->getType())) 3583 return Error(EltLoc, "getelementptr index must be an integer"); 3584 Indices.push_back(Val); 3585 } 3586 3587 if (!GetElementPtrInst::getIndexedType(Ptr->getType(), 3588 Indices.begin(), Indices.end())) 3589 return Error(Loc, "invalid getelementptr indices"); 3590 Inst = GetElementPtrInst::Create(Ptr, Indices.begin(), Indices.end()); 3591 if (InBounds) 3592 cast<GetElementPtrInst>(Inst)->setIsInBounds(true); 3593 return false; 3594} 3595 3596/// ParseExtractValue 3597/// ::= 'extractvalue' TypeAndValue (',' uint32)+ 3598bool LLParser::ParseExtractValue(Instruction *&Inst, PerFunctionState &PFS) { 3599 Value *Val; LocTy Loc; 3600 SmallVector<unsigned, 4> Indices; 3601 if (ParseTypeAndValue(Val, Loc, PFS) || 3602 ParseIndexList(Indices)) 3603 return true; 3604 3605 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 3606 return Error(Loc, "extractvalue operand must be array or struct"); 3607 3608 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 3609 Indices.end())) 3610 return Error(Loc, "invalid indices for extractvalue"); 3611 Inst = ExtractValueInst::Create(Val, Indices.begin(), Indices.end()); 3612 return false; 3613} 3614 3615/// ParseInsertValue 3616/// ::= 'insertvalue' TypeAndValue ',' TypeAndValue (',' uint32)+ 3617bool LLParser::ParseInsertValue(Instruction *&Inst, PerFunctionState &PFS) { 3618 Value *Val0, *Val1; LocTy Loc0, Loc1; 3619 SmallVector<unsigned, 4> Indices; 3620 if (ParseTypeAndValue(Val0, Loc0, PFS) || 3621 ParseToken(lltok::comma, "expected comma after insertvalue operand") || 3622 ParseTypeAndValue(Val1, Loc1, PFS) || 3623 ParseIndexList(Indices)) 3624 return true; 3625 3626 if (!isa<StructType>(Val0->getType()) && !isa<ArrayType>(Val0->getType())) 3627 return Error(Loc0, "extractvalue operand must be array or struct"); 3628 3629 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 3630 Indices.end())) 3631 return Error(Loc0, "invalid indices for insertvalue"); 3632 Inst = InsertValueInst::Create(Val0, Val1, Indices.begin(), Indices.end()); 3633 return false; 3634} 3635 3636//===----------------------------------------------------------------------===// 3637// Embedded metadata. 3638//===----------------------------------------------------------------------===// 3639 3640/// ParseMDNodeVector 3641/// ::= Element (',' Element)* 3642/// Element 3643/// ::= 'null' | TypeAndValue 3644bool LLParser::ParseMDNodeVector(SmallVectorImpl<Value*> &Elts) { 3645 assert(Lex.getKind() == lltok::lbrace); 3646 Lex.Lex(); 3647 do { 3648 Value *V = 0; 3649 if (Lex.getKind() == lltok::kw_null) { 3650 Lex.Lex(); 3651 V = 0; 3652 } else { 3653 PATypeHolder Ty(Type::getVoidTy(Context)); 3654 if (ParseType(Ty)) return true; 3655 if (Lex.getKind() == lltok::Metadata) { 3656 Lex.Lex(); 3657 MetadataBase *Node = 0; 3658 if (!ParseMDNode(Node)) 3659 V = Node; 3660 else { 3661 MetadataBase *MDS = 0; 3662 if (ParseMDString(MDS)) return true; 3663 V = MDS; 3664 } 3665 } else { 3666 Constant *C; 3667 if (ParseGlobalValue(Ty, C)) return true; 3668 V = C; 3669 } 3670 } 3671 Elts.push_back(V); 3672 } while (EatIfPresent(lltok::comma)); 3673 3674 return false; 3675} 3676