LLParser.cpp revision 211a14e476abc9b864ab6a5d5e0bbb86d288b650
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 32/// Run: module ::= toplevelentity* 33bool LLParser::Run() { 34 // Prime the lexer. 35 Lex.Lex(); 36 37 return ParseTopLevelEntities() || 38 ValidateEndOfModule(); 39} 40 41/// ValidateEndOfModule - Do final validity and sanity checks at the end of the 42/// module. 43bool LLParser::ValidateEndOfModule() { 44 // Update auto-upgraded malloc calls to "malloc". 45 // FIXME: Remove in LLVM 3.0. 46 if (MallocF) { 47 MallocF->setName("malloc"); 48 // If setName() does not set the name to "malloc", then there is already a 49 // declaration of "malloc". In that case, iterate over all calls to MallocF 50 // and get them to call the declared "malloc" instead. 51 if (MallocF->getName() != "malloc") { 52 Constant *RealMallocF = M->getFunction("malloc"); 53 if (RealMallocF->getType() != MallocF->getType()) 54 RealMallocF = ConstantExpr::getBitCast(RealMallocF, MallocF->getType()); 55 MallocF->replaceAllUsesWith(RealMallocF); 56 MallocF->eraseFromParent(); 57 MallocF = NULL; 58 } 59 } 60 61 62 // If there are entries in ForwardRefBlockAddresses at this point, they are 63 // references after the function was defined. Resolve those now. 64 while (!ForwardRefBlockAddresses.empty()) { 65 // Okay, we are referencing an already-parsed function, resolve them now. 66 Function *TheFn = 0; 67 const ValID &Fn = ForwardRefBlockAddresses.begin()->first; 68 if (Fn.Kind == ValID::t_GlobalName) 69 TheFn = M->getFunction(Fn.StrVal); 70 else if (Fn.UIntVal < NumberedVals.size()) 71 TheFn = dyn_cast<Function>(NumberedVals[Fn.UIntVal]); 72 73 if (TheFn == 0) 74 return Error(Fn.Loc, "unknown function referenced by blockaddress"); 75 76 // Resolve all these references. 77 if (ResolveForwardRefBlockAddresses(TheFn, 78 ForwardRefBlockAddresses.begin()->second, 79 0)) 80 return true; 81 82 ForwardRefBlockAddresses.erase(ForwardRefBlockAddresses.begin()); 83 } 84 85 86 if (!ForwardRefTypes.empty()) 87 return Error(ForwardRefTypes.begin()->second.second, 88 "use of undefined type named '" + 89 ForwardRefTypes.begin()->first + "'"); 90 if (!ForwardRefTypeIDs.empty()) 91 return Error(ForwardRefTypeIDs.begin()->second.second, 92 "use of undefined type '%" + 93 utostr(ForwardRefTypeIDs.begin()->first) + "'"); 94 95 if (!ForwardRefVals.empty()) 96 return Error(ForwardRefVals.begin()->second.second, 97 "use of undefined value '@" + ForwardRefVals.begin()->first + 98 "'"); 99 100 if (!ForwardRefValIDs.empty()) 101 return Error(ForwardRefValIDs.begin()->second.second, 102 "use of undefined value '@" + 103 utostr(ForwardRefValIDs.begin()->first) + "'"); 104 105 if (!ForwardRefMDNodes.empty()) 106 return Error(ForwardRefMDNodes.begin()->second.second, 107 "use of undefined metadata '!" + 108 utostr(ForwardRefMDNodes.begin()->first) + "'"); 109 110 111 // Look for intrinsic functions and CallInst that need to be upgraded 112 for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ) 113 UpgradeCallsToIntrinsic(FI++); // must be post-increment, as we remove 114 115 // Check debug info intrinsics. 116 CheckDebugInfoIntrinsics(M); 117 return false; 118} 119 120bool LLParser::ResolveForwardRefBlockAddresses(Function *TheFn, 121 std::vector<std::pair<ValID, GlobalValue*> > &Refs, 122 PerFunctionState *PFS) { 123 // Loop over all the references, resolving them. 124 for (unsigned i = 0, e = Refs.size(); i != e; ++i) { 125 BasicBlock *Res; 126 if (PFS) { 127 if (Refs[i].first.Kind == ValID::t_LocalName) 128 Res = PFS->GetBB(Refs[i].first.StrVal, Refs[i].first.Loc); 129 else 130 Res = PFS->GetBB(Refs[i].first.UIntVal, Refs[i].first.Loc); 131 } else if (Refs[i].first.Kind == ValID::t_LocalID) { 132 return Error(Refs[i].first.Loc, 133 "cannot take address of numeric label after the function is defined"); 134 } else { 135 Res = dyn_cast_or_null<BasicBlock>( 136 TheFn->getValueSymbolTable().lookup(Refs[i].first.StrVal)); 137 } 138 139 if (Res == 0) 140 return Error(Refs[i].first.Loc, 141 "referenced value is not a basic block"); 142 143 // Get the BlockAddress for this and update references to use it. 144 BlockAddress *BA = BlockAddress::get(TheFn, Res); 145 Refs[i].second->replaceAllUsesWith(BA); 146 Refs[i].second->eraseFromParent(); 147 } 148 return false; 149} 150 151 152//===----------------------------------------------------------------------===// 153// Top-Level Entities 154//===----------------------------------------------------------------------===// 155 156bool LLParser::ParseTopLevelEntities() { 157 while (1) { 158 switch (Lex.getKind()) { 159 default: return TokError("expected top-level entity"); 160 case lltok::Eof: return false; 161 //case lltok::kw_define: 162 case lltok::kw_declare: if (ParseDeclare()) return true; break; 163 case lltok::kw_define: if (ParseDefine()) return true; break; 164 case lltok::kw_module: if (ParseModuleAsm()) return true; break; 165 case lltok::kw_target: if (ParseTargetDefinition()) return true; break; 166 case lltok::kw_deplibs: if (ParseDepLibs()) return true; break; 167 case lltok::kw_type: if (ParseUnnamedType()) return true; break; 168 case lltok::LocalVarID: if (ParseUnnamedType()) return true; break; 169 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0 170 case lltok::LocalVar: if (ParseNamedType()) return true; break; 171 case lltok::GlobalID: if (ParseUnnamedGlobal()) return true; break; 172 case lltok::GlobalVar: if (ParseNamedGlobal()) return true; break; 173 case lltok::Metadata: if (ParseStandaloneMetadata()) return true; break; 174 case lltok::NamedOrCustomMD: if (ParseNamedMetadata()) return true; break; 175 176 // The Global variable production with no name can have many different 177 // optional leading prefixes, the production is: 178 // GlobalVar ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 179 // OptionalAddrSpace ('constant'|'global') ... 180 case lltok::kw_private : // OptionalLinkage 181 case lltok::kw_linker_private: // OptionalLinkage 182 case lltok::kw_internal: // OptionalLinkage 183 case lltok::kw_weak: // OptionalLinkage 184 case lltok::kw_weak_odr: // OptionalLinkage 185 case lltok::kw_linkonce: // OptionalLinkage 186 case lltok::kw_linkonce_odr: // OptionalLinkage 187 case lltok::kw_appending: // OptionalLinkage 188 case lltok::kw_dllexport: // OptionalLinkage 189 case lltok::kw_common: // OptionalLinkage 190 case lltok::kw_dllimport: // OptionalLinkage 191 case lltok::kw_extern_weak: // OptionalLinkage 192 case lltok::kw_external: { // OptionalLinkage 193 unsigned Linkage, Visibility; 194 if (ParseOptionalLinkage(Linkage) || 195 ParseOptionalVisibility(Visibility) || 196 ParseGlobal("", SMLoc(), Linkage, true, Visibility)) 197 return true; 198 break; 199 } 200 case lltok::kw_default: // OptionalVisibility 201 case lltok::kw_hidden: // OptionalVisibility 202 case lltok::kw_protected: { // OptionalVisibility 203 unsigned Visibility; 204 if (ParseOptionalVisibility(Visibility) || 205 ParseGlobal("", SMLoc(), 0, false, Visibility)) 206 return true; 207 break; 208 } 209 210 case lltok::kw_thread_local: // OptionalThreadLocal 211 case lltok::kw_addrspace: // OptionalAddrSpace 212 case lltok::kw_constant: // GlobalType 213 case lltok::kw_global: // GlobalType 214 if (ParseGlobal("", SMLoc(), 0, false, 0)) return true; 215 break; 216 } 217 } 218} 219 220 221/// toplevelentity 222/// ::= 'module' 'asm' STRINGCONSTANT 223bool LLParser::ParseModuleAsm() { 224 assert(Lex.getKind() == lltok::kw_module); 225 Lex.Lex(); 226 227 std::string AsmStr; 228 if (ParseToken(lltok::kw_asm, "expected 'module asm'") || 229 ParseStringConstant(AsmStr)) return true; 230 231 const std::string &AsmSoFar = M->getModuleInlineAsm(); 232 if (AsmSoFar.empty()) 233 M->setModuleInlineAsm(AsmStr); 234 else 235 M->setModuleInlineAsm(AsmSoFar+"\n"+AsmStr); 236 return false; 237} 238 239/// toplevelentity 240/// ::= 'target' 'triple' '=' STRINGCONSTANT 241/// ::= 'target' 'datalayout' '=' STRINGCONSTANT 242bool LLParser::ParseTargetDefinition() { 243 assert(Lex.getKind() == lltok::kw_target); 244 std::string Str; 245 switch (Lex.Lex()) { 246 default: return TokError("unknown target property"); 247 case lltok::kw_triple: 248 Lex.Lex(); 249 if (ParseToken(lltok::equal, "expected '=' after target triple") || 250 ParseStringConstant(Str)) 251 return true; 252 M->setTargetTriple(Str); 253 return false; 254 case lltok::kw_datalayout: 255 Lex.Lex(); 256 if (ParseToken(lltok::equal, "expected '=' after target datalayout") || 257 ParseStringConstant(Str)) 258 return true; 259 M->setDataLayout(Str); 260 return false; 261 } 262} 263 264/// toplevelentity 265/// ::= 'deplibs' '=' '[' ']' 266/// ::= 'deplibs' '=' '[' STRINGCONSTANT (',' STRINGCONSTANT)* ']' 267bool LLParser::ParseDepLibs() { 268 assert(Lex.getKind() == lltok::kw_deplibs); 269 Lex.Lex(); 270 if (ParseToken(lltok::equal, "expected '=' after deplibs") || 271 ParseToken(lltok::lsquare, "expected '=' after deplibs")) 272 return true; 273 274 if (EatIfPresent(lltok::rsquare)) 275 return false; 276 277 std::string Str; 278 if (ParseStringConstant(Str)) return true; 279 M->addLibrary(Str); 280 281 while (EatIfPresent(lltok::comma)) { 282 if (ParseStringConstant(Str)) return true; 283 M->addLibrary(Str); 284 } 285 286 return ParseToken(lltok::rsquare, "expected ']' at end of list"); 287} 288 289/// ParseUnnamedType: 290/// ::= 'type' type 291/// ::= LocalVarID '=' 'type' type 292bool LLParser::ParseUnnamedType() { 293 unsigned TypeID = NumberedTypes.size(); 294 295 // Handle the LocalVarID form. 296 if (Lex.getKind() == lltok::LocalVarID) { 297 if (Lex.getUIntVal() != TypeID) 298 return Error(Lex.getLoc(), "type expected to be numbered '%" + 299 utostr(TypeID) + "'"); 300 Lex.Lex(); // eat LocalVarID; 301 302 if (ParseToken(lltok::equal, "expected '=' after name")) 303 return true; 304 } 305 306 assert(Lex.getKind() == lltok::kw_type); 307 LocTy TypeLoc = Lex.getLoc(); 308 Lex.Lex(); // eat kw_type 309 310 PATypeHolder Ty(Type::getVoidTy(Context)); 311 if (ParseType(Ty)) return true; 312 313 // See if this type was previously referenced. 314 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 315 FI = ForwardRefTypeIDs.find(TypeID); 316 if (FI != ForwardRefTypeIDs.end()) { 317 if (FI->second.first.get() == Ty) 318 return Error(TypeLoc, "self referential type is invalid"); 319 320 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 321 Ty = FI->second.first.get(); 322 ForwardRefTypeIDs.erase(FI); 323 } 324 325 NumberedTypes.push_back(Ty); 326 327 return false; 328} 329 330/// toplevelentity 331/// ::= LocalVar '=' 'type' type 332bool LLParser::ParseNamedType() { 333 std::string Name = Lex.getStrVal(); 334 LocTy NameLoc = Lex.getLoc(); 335 Lex.Lex(); // eat LocalVar. 336 337 PATypeHolder Ty(Type::getVoidTy(Context)); 338 339 if (ParseToken(lltok::equal, "expected '=' after name") || 340 ParseToken(lltok::kw_type, "expected 'type' after name") || 341 ParseType(Ty)) 342 return true; 343 344 // Set the type name, checking for conflicts as we do so. 345 bool AlreadyExists = M->addTypeName(Name, Ty); 346 if (!AlreadyExists) return false; 347 348 // See if this type is a forward reference. We need to eagerly resolve 349 // types to allow recursive type redefinitions below. 350 std::map<std::string, std::pair<PATypeHolder, LocTy> >::iterator 351 FI = ForwardRefTypes.find(Name); 352 if (FI != ForwardRefTypes.end()) { 353 if (FI->second.first.get() == Ty) 354 return Error(NameLoc, "self referential type is invalid"); 355 356 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 357 Ty = FI->second.first.get(); 358 ForwardRefTypes.erase(FI); 359 } 360 361 // Inserting a name that is already defined, get the existing name. 362 const Type *Existing = M->getTypeByName(Name); 363 assert(Existing && "Conflict but no matching type?!"); 364 365 // Otherwise, this is an attempt to redefine a type. That's okay if 366 // the redefinition is identical to the original. 367 // FIXME: REMOVE REDEFINITIONS IN LLVM 3.0 368 if (Existing == Ty) return false; 369 370 // Any other kind of (non-equivalent) redefinition is an error. 371 return Error(NameLoc, "redefinition of type named '" + Name + "' of type '" + 372 Ty->getDescription() + "'"); 373} 374 375 376/// toplevelentity 377/// ::= 'declare' FunctionHeader 378bool LLParser::ParseDeclare() { 379 assert(Lex.getKind() == lltok::kw_declare); 380 Lex.Lex(); 381 382 Function *F; 383 return ParseFunctionHeader(F, false); 384} 385 386/// toplevelentity 387/// ::= 'define' FunctionHeader '{' ... 388bool LLParser::ParseDefine() { 389 assert(Lex.getKind() == lltok::kw_define); 390 Lex.Lex(); 391 392 Function *F; 393 return ParseFunctionHeader(F, true) || 394 ParseFunctionBody(*F); 395} 396 397/// ParseGlobalType 398/// ::= 'constant' 399/// ::= 'global' 400bool LLParser::ParseGlobalType(bool &IsConstant) { 401 if (Lex.getKind() == lltok::kw_constant) 402 IsConstant = true; 403 else if (Lex.getKind() == lltok::kw_global) 404 IsConstant = false; 405 else { 406 IsConstant = false; 407 return TokError("expected 'global' or 'constant'"); 408 } 409 Lex.Lex(); 410 return false; 411} 412 413/// ParseUnnamedGlobal: 414/// OptionalVisibility ALIAS ... 415/// OptionalLinkage OptionalVisibility ... -> global variable 416/// GlobalID '=' OptionalVisibility ALIAS ... 417/// GlobalID '=' OptionalLinkage OptionalVisibility ... -> global variable 418bool LLParser::ParseUnnamedGlobal() { 419 unsigned VarID = NumberedVals.size(); 420 std::string Name; 421 LocTy NameLoc = Lex.getLoc(); 422 423 // Handle the GlobalID form. 424 if (Lex.getKind() == lltok::GlobalID) { 425 if (Lex.getUIntVal() != VarID) 426 return Error(Lex.getLoc(), "variable expected to be numbered '%" + 427 utostr(VarID) + "'"); 428 Lex.Lex(); // eat GlobalID; 429 430 if (ParseToken(lltok::equal, "expected '=' after name")) 431 return true; 432 } 433 434 bool HasLinkage; 435 unsigned Linkage, Visibility; 436 if (ParseOptionalLinkage(Linkage, HasLinkage) || 437 ParseOptionalVisibility(Visibility)) 438 return true; 439 440 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 441 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 442 return ParseAlias(Name, NameLoc, Visibility); 443} 444 445/// ParseNamedGlobal: 446/// GlobalVar '=' OptionalVisibility ALIAS ... 447/// GlobalVar '=' OptionalLinkage OptionalVisibility ... -> global variable 448bool LLParser::ParseNamedGlobal() { 449 assert(Lex.getKind() == lltok::GlobalVar); 450 LocTy NameLoc = Lex.getLoc(); 451 std::string Name = Lex.getStrVal(); 452 Lex.Lex(); 453 454 bool HasLinkage; 455 unsigned Linkage, Visibility; 456 if (ParseToken(lltok::equal, "expected '=' in global variable") || 457 ParseOptionalLinkage(Linkage, HasLinkage) || 458 ParseOptionalVisibility(Visibility)) 459 return true; 460 461 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 462 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 463 return ParseAlias(Name, NameLoc, Visibility); 464} 465 466// MDString: 467// ::= '!' STRINGCONSTANT 468bool LLParser::ParseMDString(MetadataBase *&MDS) { 469 std::string Str; 470 if (ParseStringConstant(Str)) return true; 471 MDS = MDString::get(Context, Str); 472 return false; 473} 474 475// MDNode: 476// ::= '!' MDNodeNumber 477bool LLParser::ParseMDNode(MetadataBase *&Node) { 478 // !{ ..., !42, ... } 479 unsigned MID = 0; 480 if (ParseUInt32(MID)) return true; 481 482 // Check existing MDNode. 483 std::map<unsigned, WeakVH>::iterator I = MetadataCache.find(MID); 484 if (I != MetadataCache.end()) { 485 Node = cast<MetadataBase>(I->second); 486 return false; 487 } 488 489 // Check known forward references. 490 std::map<unsigned, std::pair<WeakVH, LocTy> >::iterator 491 FI = ForwardRefMDNodes.find(MID); 492 if (FI != ForwardRefMDNodes.end()) { 493 Node = cast<MetadataBase>(FI->second.first); 494 return false; 495 } 496 497 // Create MDNode forward reference 498 SmallVector<Value *, 1> Elts; 499 std::string FwdRefName = "llvm.mdnode.fwdref." + utostr(MID); 500 Elts.push_back(MDString::get(Context, FwdRefName)); 501 MDNode *FwdNode = MDNode::get(Context, Elts.data(), Elts.size()); 502 ForwardRefMDNodes[MID] = std::make_pair(FwdNode, Lex.getLoc()); 503 Node = FwdNode; 504 return false; 505} 506 507///ParseNamedMetadata: 508/// !foo = !{ !1, !2 } 509bool LLParser::ParseNamedMetadata() { 510 assert(Lex.getKind() == lltok::NamedOrCustomMD); 511 Lex.Lex(); 512 std::string Name = Lex.getStrVal(); 513 514 if (ParseToken(lltok::equal, "expected '=' here")) 515 return true; 516 517 if (Lex.getKind() != lltok::Metadata) 518 return TokError("Expected '!' here"); 519 Lex.Lex(); 520 521 if (Lex.getKind() != lltok::lbrace) 522 return TokError("Expected '{' here"); 523 Lex.Lex(); 524 SmallVector<MetadataBase *, 8> Elts; 525 do { 526 if (Lex.getKind() != lltok::Metadata) 527 return TokError("Expected '!' here"); 528 Lex.Lex(); 529 MetadataBase *N = 0; 530 if (ParseMDNode(N)) return true; 531 Elts.push_back(N); 532 } while (EatIfPresent(lltok::comma)); 533 534 if (ParseToken(lltok::rbrace, "expected end of metadata node")) 535 return true; 536 537 NamedMDNode::Create(Context, Name, Elts.data(), Elts.size(), M); 538 return false; 539} 540 541/// ParseStandaloneMetadata: 542/// !42 = !{...} 543bool LLParser::ParseStandaloneMetadata() { 544 assert(Lex.getKind() == lltok::Metadata); 545 Lex.Lex(); 546 unsigned MetadataID = 0; 547 if (ParseUInt32(MetadataID)) 548 return true; 549 if (MetadataCache.find(MetadataID) != MetadataCache.end()) 550 return TokError("Metadata id is already used"); 551 if (ParseToken(lltok::equal, "expected '=' here")) 552 return true; 553 554 LocTy TyLoc; 555 PATypeHolder Ty(Type::getVoidTy(Context)); 556 if (ParseType(Ty, TyLoc)) 557 return true; 558 559 if (Lex.getKind() != lltok::Metadata) 560 return TokError("Expected metadata here"); 561 562 Lex.Lex(); 563 if (Lex.getKind() != lltok::lbrace) 564 return TokError("Expected '{' here"); 565 566 SmallVector<Value *, 16> Elts; 567 if (ParseMDNodeVector(Elts) 568 || ParseToken(lltok::rbrace, "expected end of metadata node")) 569 return true; 570 571 MDNode *Init = MDNode::get(Context, Elts.data(), Elts.size()); 572 MetadataCache[MetadataID] = Init; 573 std::map<unsigned, std::pair<WeakVH, LocTy> >::iterator 574 FI = ForwardRefMDNodes.find(MetadataID); 575 if (FI != ForwardRefMDNodes.end()) { 576 MDNode *FwdNode = cast<MDNode>(FI->second.first); 577 FwdNode->replaceAllUsesWith(Init); 578 ForwardRefMDNodes.erase(FI); 579 } 580 581 return false; 582} 583 584/// ParseInlineMetadata: 585/// !{type %instr} 586/// !{...} MDNode 587/// !"foo" MDString 588bool LLParser::ParseInlineMetadata(Value *&V, PerFunctionState &PFS) { 589 assert(Lex.getKind() == lltok::Metadata && "Only for Metadata"); 590 V = 0; 591 592 Lex.Lex(); 593 if (Lex.getKind() == lltok::lbrace) { 594 Lex.Lex(); 595 if (ParseTypeAndValue(V, PFS) || 596 ParseToken(lltok::rbrace, "expected end of metadata node")) 597 return true; 598 599 Value *Vals[] = { V }; 600 V = MDNode::get(Context, Vals, 1); 601 return false; 602 } 603 604 // Standalone metadata reference 605 // !{ ..., !42, ... } 606 if (!ParseMDNode((MetadataBase *&)V)) 607 return false; 608 609 // MDString: 610 // '!' STRINGCONSTANT 611 if (ParseMDString((MetadataBase *&)V)) return true; 612 return false; 613} 614 615/// ParseAlias: 616/// ::= GlobalVar '=' OptionalVisibility 'alias' OptionalLinkage Aliasee 617/// Aliasee 618/// ::= TypeAndValue 619/// ::= 'bitcast' '(' TypeAndValue 'to' Type ')' 620/// ::= 'getelementptr' 'inbounds'? '(' ... ')' 621/// 622/// Everything through visibility has already been parsed. 623/// 624bool LLParser::ParseAlias(const std::string &Name, LocTy NameLoc, 625 unsigned Visibility) { 626 assert(Lex.getKind() == lltok::kw_alias); 627 Lex.Lex(); 628 unsigned Linkage; 629 LocTy LinkageLoc = Lex.getLoc(); 630 if (ParseOptionalLinkage(Linkage)) 631 return true; 632 633 if (Linkage != GlobalValue::ExternalLinkage && 634 Linkage != GlobalValue::WeakAnyLinkage && 635 Linkage != GlobalValue::WeakODRLinkage && 636 Linkage != GlobalValue::InternalLinkage && 637 Linkage != GlobalValue::PrivateLinkage && 638 Linkage != GlobalValue::LinkerPrivateLinkage) 639 return Error(LinkageLoc, "invalid linkage type for alias"); 640 641 Constant *Aliasee; 642 LocTy AliaseeLoc = Lex.getLoc(); 643 if (Lex.getKind() != lltok::kw_bitcast && 644 Lex.getKind() != lltok::kw_getelementptr) { 645 if (ParseGlobalTypeAndValue(Aliasee)) return true; 646 } else { 647 // The bitcast dest type is not present, it is implied by the dest type. 648 ValID ID; 649 if (ParseValID(ID)) return true; 650 if (ID.Kind != ValID::t_Constant) 651 return Error(AliaseeLoc, "invalid aliasee"); 652 Aliasee = ID.ConstantVal; 653 } 654 655 if (!isa<PointerType>(Aliasee->getType())) 656 return Error(AliaseeLoc, "alias must have pointer type"); 657 658 // Okay, create the alias but do not insert it into the module yet. 659 GlobalAlias* GA = new GlobalAlias(Aliasee->getType(), 660 (GlobalValue::LinkageTypes)Linkage, Name, 661 Aliasee); 662 GA->setVisibility((GlobalValue::VisibilityTypes)Visibility); 663 664 // See if this value already exists in the symbol table. If so, it is either 665 // a redefinition or a definition of a forward reference. 666 if (GlobalValue *Val = M->getNamedValue(Name)) { 667 // See if this was a redefinition. If so, there is no entry in 668 // ForwardRefVals. 669 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 670 I = ForwardRefVals.find(Name); 671 if (I == ForwardRefVals.end()) 672 return Error(NameLoc, "redefinition of global named '@" + Name + "'"); 673 674 // Otherwise, this was a definition of forward ref. Verify that types 675 // agree. 676 if (Val->getType() != GA->getType()) 677 return Error(NameLoc, 678 "forward reference and definition of alias have different types"); 679 680 // If they agree, just RAUW the old value with the alias and remove the 681 // forward ref info. 682 Val->replaceAllUsesWith(GA); 683 Val->eraseFromParent(); 684 ForwardRefVals.erase(I); 685 } 686 687 // Insert into the module, we know its name won't collide now. 688 M->getAliasList().push_back(GA); 689 assert(GA->getNameStr() == Name && "Should not be a name conflict!"); 690 691 return false; 692} 693 694/// ParseGlobal 695/// ::= GlobalVar '=' OptionalLinkage OptionalVisibility OptionalThreadLocal 696/// OptionalAddrSpace GlobalType Type Const 697/// ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 698/// OptionalAddrSpace GlobalType Type Const 699/// 700/// Everything through visibility has been parsed already. 701/// 702bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc, 703 unsigned Linkage, bool HasLinkage, 704 unsigned Visibility) { 705 unsigned AddrSpace; 706 bool ThreadLocal, IsConstant; 707 LocTy TyLoc; 708 709 PATypeHolder Ty(Type::getVoidTy(Context)); 710 if (ParseOptionalToken(lltok::kw_thread_local, ThreadLocal) || 711 ParseOptionalAddrSpace(AddrSpace) || 712 ParseGlobalType(IsConstant) || 713 ParseType(Ty, TyLoc)) 714 return true; 715 716 // If the linkage is specified and is external, then no initializer is 717 // present. 718 Constant *Init = 0; 719 if (!HasLinkage || (Linkage != GlobalValue::DLLImportLinkage && 720 Linkage != GlobalValue::ExternalWeakLinkage && 721 Linkage != GlobalValue::ExternalLinkage)) { 722 if (ParseGlobalValue(Ty, Init)) 723 return true; 724 } 725 726 if (isa<FunctionType>(Ty) || Ty->isLabelTy()) 727 return Error(TyLoc, "invalid type for global variable"); 728 729 GlobalVariable *GV = 0; 730 731 // See if the global was forward referenced, if so, use the global. 732 if (!Name.empty()) { 733 if (GlobalValue *GVal = M->getNamedValue(Name)) { 734 if (!ForwardRefVals.erase(Name) || !isa<GlobalValue>(GVal)) 735 return Error(NameLoc, "redefinition of global '@" + Name + "'"); 736 GV = cast<GlobalVariable>(GVal); 737 } 738 } else { 739 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 740 I = ForwardRefValIDs.find(NumberedVals.size()); 741 if (I != ForwardRefValIDs.end()) { 742 GV = cast<GlobalVariable>(I->second.first); 743 ForwardRefValIDs.erase(I); 744 } 745 } 746 747 if (GV == 0) { 748 GV = new GlobalVariable(*M, Ty, false, GlobalValue::ExternalLinkage, 0, 749 Name, 0, false, AddrSpace); 750 } else { 751 if (GV->getType()->getElementType() != Ty) 752 return Error(TyLoc, 753 "forward reference and definition of global have different types"); 754 755 // Move the forward-reference to the correct spot in the module. 756 M->getGlobalList().splice(M->global_end(), M->getGlobalList(), GV); 757 } 758 759 if (Name.empty()) 760 NumberedVals.push_back(GV); 761 762 // Set the parsed properties on the global. 763 if (Init) 764 GV->setInitializer(Init); 765 GV->setConstant(IsConstant); 766 GV->setLinkage((GlobalValue::LinkageTypes)Linkage); 767 GV->setVisibility((GlobalValue::VisibilityTypes)Visibility); 768 GV->setThreadLocal(ThreadLocal); 769 770 // Parse attributes on the global. 771 while (Lex.getKind() == lltok::comma) { 772 Lex.Lex(); 773 774 if (Lex.getKind() == lltok::kw_section) { 775 Lex.Lex(); 776 GV->setSection(Lex.getStrVal()); 777 if (ParseToken(lltok::StringConstant, "expected global section string")) 778 return true; 779 } else if (Lex.getKind() == lltok::kw_align) { 780 unsigned Alignment; 781 if (ParseOptionalAlignment(Alignment)) return true; 782 GV->setAlignment(Alignment); 783 } else { 784 TokError("unknown global variable property!"); 785 } 786 } 787 788 return false; 789} 790 791 792//===----------------------------------------------------------------------===// 793// GlobalValue Reference/Resolution Routines. 794//===----------------------------------------------------------------------===// 795 796/// GetGlobalVal - Get a value with the specified name or ID, creating a 797/// forward reference record if needed. This can return null if the value 798/// exists but does not have the right type. 799GlobalValue *LLParser::GetGlobalVal(const std::string &Name, const Type *Ty, 800 LocTy Loc) { 801 const PointerType *PTy = dyn_cast<PointerType>(Ty); 802 if (PTy == 0) { 803 Error(Loc, "global variable reference must have pointer type"); 804 return 0; 805 } 806 807 // Look this name up in the normal function symbol table. 808 GlobalValue *Val = 809 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name)); 810 811 // If this is a forward reference for the value, see if we already created a 812 // forward ref record. 813 if (Val == 0) { 814 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 815 I = ForwardRefVals.find(Name); 816 if (I != ForwardRefVals.end()) 817 Val = I->second.first; 818 } 819 820 // If we have the value in the symbol table or fwd-ref table, return it. 821 if (Val) { 822 if (Val->getType() == Ty) return Val; 823 Error(Loc, "'@" + Name + "' defined with type '" + 824 Val->getType()->getDescription() + "'"); 825 return 0; 826 } 827 828 // Otherwise, create a new forward reference for this value and remember it. 829 GlobalValue *FwdVal; 830 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 831 // Function types can return opaque but functions can't. 832 if (isa<OpaqueType>(FT->getReturnType())) { 833 Error(Loc, "function may not return opaque type"); 834 return 0; 835 } 836 837 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M); 838 } else { 839 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 840 GlobalValue::ExternalWeakLinkage, 0, Name); 841 } 842 843 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 844 return FwdVal; 845} 846 847GlobalValue *LLParser::GetGlobalVal(unsigned ID, const Type *Ty, LocTy Loc) { 848 const PointerType *PTy = dyn_cast<PointerType>(Ty); 849 if (PTy == 0) { 850 Error(Loc, "global variable reference must have pointer type"); 851 return 0; 852 } 853 854 GlobalValue *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 855 856 // If this is a forward reference for the value, see if we already created a 857 // forward ref record. 858 if (Val == 0) { 859 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 860 I = ForwardRefValIDs.find(ID); 861 if (I != ForwardRefValIDs.end()) 862 Val = I->second.first; 863 } 864 865 // If we have the value in the symbol table or fwd-ref table, return it. 866 if (Val) { 867 if (Val->getType() == Ty) return Val; 868 Error(Loc, "'@" + utostr(ID) + "' defined with type '" + 869 Val->getType()->getDescription() + "'"); 870 return 0; 871 } 872 873 // Otherwise, create a new forward reference for this value and remember it. 874 GlobalValue *FwdVal; 875 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 876 // Function types can return opaque but functions can't. 877 if (isa<OpaqueType>(FT->getReturnType())) { 878 Error(Loc, "function may not return opaque type"); 879 return 0; 880 } 881 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, "", M); 882 } else { 883 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 884 GlobalValue::ExternalWeakLinkage, 0, ""); 885 } 886 887 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 888 return FwdVal; 889} 890 891 892//===----------------------------------------------------------------------===// 893// Helper Routines. 894//===----------------------------------------------------------------------===// 895 896/// ParseToken - If the current token has the specified kind, eat it and return 897/// success. Otherwise, emit the specified error and return failure. 898bool LLParser::ParseToken(lltok::Kind T, const char *ErrMsg) { 899 if (Lex.getKind() != T) 900 return TokError(ErrMsg); 901 Lex.Lex(); 902 return false; 903} 904 905/// ParseStringConstant 906/// ::= StringConstant 907bool LLParser::ParseStringConstant(std::string &Result) { 908 if (Lex.getKind() != lltok::StringConstant) 909 return TokError("expected string constant"); 910 Result = Lex.getStrVal(); 911 Lex.Lex(); 912 return false; 913} 914 915/// ParseUInt32 916/// ::= uint32 917bool LLParser::ParseUInt32(unsigned &Val) { 918 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned()) 919 return TokError("expected integer"); 920 uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(0xFFFFFFFFULL+1); 921 if (Val64 != unsigned(Val64)) 922 return TokError("expected 32-bit integer (too large)"); 923 Val = Val64; 924 Lex.Lex(); 925 return false; 926} 927 928 929/// ParseOptionalAddrSpace 930/// := /*empty*/ 931/// := 'addrspace' '(' uint32 ')' 932bool LLParser::ParseOptionalAddrSpace(unsigned &AddrSpace) { 933 AddrSpace = 0; 934 if (!EatIfPresent(lltok::kw_addrspace)) 935 return false; 936 return ParseToken(lltok::lparen, "expected '(' in address space") || 937 ParseUInt32(AddrSpace) || 938 ParseToken(lltok::rparen, "expected ')' in address space"); 939} 940 941/// ParseOptionalAttrs - Parse a potentially empty attribute list. AttrKind 942/// indicates what kind of attribute list this is: 0: function arg, 1: result, 943/// 2: function attr. 944/// 3: function arg after value: FIXME: REMOVE IN LLVM 3.0 945bool LLParser::ParseOptionalAttrs(unsigned &Attrs, unsigned AttrKind) { 946 Attrs = Attribute::None; 947 LocTy AttrLoc = Lex.getLoc(); 948 949 while (1) { 950 switch (Lex.getKind()) { 951 case lltok::kw_sext: 952 case lltok::kw_zext: 953 // Treat these as signext/zeroext if they occur in the argument list after 954 // the value, as in "call i8 @foo(i8 10 sext)". If they occur before the 955 // value, as in "call i8 @foo(i8 sext (" then it is part of a constant 956 // expr. 957 // FIXME: REMOVE THIS IN LLVM 3.0 958 if (AttrKind == 3) { 959 if (Lex.getKind() == lltok::kw_sext) 960 Attrs |= Attribute::SExt; 961 else 962 Attrs |= Attribute::ZExt; 963 break; 964 } 965 // FALL THROUGH. 966 default: // End of attributes. 967 if (AttrKind != 2 && (Attrs & Attribute::FunctionOnly)) 968 return Error(AttrLoc, "invalid use of function-only attribute"); 969 970 if (AttrKind != 0 && AttrKind != 3 && (Attrs & Attribute::ParameterOnly)) 971 return Error(AttrLoc, "invalid use of parameter-only attribute"); 972 973 return false; 974 case lltok::kw_zeroext: Attrs |= Attribute::ZExt; break; 975 case lltok::kw_signext: Attrs |= Attribute::SExt; break; 976 case lltok::kw_inreg: Attrs |= Attribute::InReg; break; 977 case lltok::kw_sret: Attrs |= Attribute::StructRet; break; 978 case lltok::kw_noalias: Attrs |= Attribute::NoAlias; break; 979 case lltok::kw_nocapture: Attrs |= Attribute::NoCapture; break; 980 case lltok::kw_byval: Attrs |= Attribute::ByVal; break; 981 case lltok::kw_nest: Attrs |= Attribute::Nest; break; 982 983 case lltok::kw_noreturn: Attrs |= Attribute::NoReturn; break; 984 case lltok::kw_nounwind: Attrs |= Attribute::NoUnwind; break; 985 case lltok::kw_noinline: Attrs |= Attribute::NoInline; break; 986 case lltok::kw_readnone: Attrs |= Attribute::ReadNone; break; 987 case lltok::kw_readonly: Attrs |= Attribute::ReadOnly; break; 988 case lltok::kw_inlinehint: Attrs |= Attribute::InlineHint; break; 989 case lltok::kw_alwaysinline: Attrs |= Attribute::AlwaysInline; break; 990 case lltok::kw_optsize: Attrs |= Attribute::OptimizeForSize; break; 991 case lltok::kw_ssp: Attrs |= Attribute::StackProtect; break; 992 case lltok::kw_sspreq: Attrs |= Attribute::StackProtectReq; break; 993 case lltok::kw_noredzone: Attrs |= Attribute::NoRedZone; break; 994 case lltok::kw_noimplicitfloat: Attrs |= Attribute::NoImplicitFloat; break; 995 case lltok::kw_naked: Attrs |= Attribute::Naked; break; 996 997 case lltok::kw_align: { 998 unsigned Alignment; 999 if (ParseOptionalAlignment(Alignment)) 1000 return true; 1001 Attrs |= Attribute::constructAlignmentFromInt(Alignment); 1002 continue; 1003 } 1004 } 1005 Lex.Lex(); 1006 } 1007} 1008 1009/// ParseOptionalLinkage 1010/// ::= /*empty*/ 1011/// ::= 'private' 1012/// ::= 'linker_private' 1013/// ::= 'internal' 1014/// ::= 'weak' 1015/// ::= 'weak_odr' 1016/// ::= 'linkonce' 1017/// ::= 'linkonce_odr' 1018/// ::= 'appending' 1019/// ::= 'dllexport' 1020/// ::= 'common' 1021/// ::= 'dllimport' 1022/// ::= 'extern_weak' 1023/// ::= 'external' 1024bool LLParser::ParseOptionalLinkage(unsigned &Res, bool &HasLinkage) { 1025 HasLinkage = false; 1026 switch (Lex.getKind()) { 1027 default: Res=GlobalValue::ExternalLinkage; return false; 1028 case lltok::kw_private: Res = GlobalValue::PrivateLinkage; break; 1029 case lltok::kw_linker_private: Res = GlobalValue::LinkerPrivateLinkage; break; 1030 case lltok::kw_internal: Res = GlobalValue::InternalLinkage; break; 1031 case lltok::kw_weak: Res = GlobalValue::WeakAnyLinkage; break; 1032 case lltok::kw_weak_odr: Res = GlobalValue::WeakODRLinkage; break; 1033 case lltok::kw_linkonce: Res = GlobalValue::LinkOnceAnyLinkage; break; 1034 case lltok::kw_linkonce_odr: Res = GlobalValue::LinkOnceODRLinkage; break; 1035 case lltok::kw_available_externally: 1036 Res = GlobalValue::AvailableExternallyLinkage; 1037 break; 1038 case lltok::kw_appending: Res = GlobalValue::AppendingLinkage; break; 1039 case lltok::kw_dllexport: Res = GlobalValue::DLLExportLinkage; break; 1040 case lltok::kw_common: Res = GlobalValue::CommonLinkage; break; 1041 case lltok::kw_dllimport: Res = GlobalValue::DLLImportLinkage; break; 1042 case lltok::kw_extern_weak: Res = GlobalValue::ExternalWeakLinkage; break; 1043 case lltok::kw_external: Res = GlobalValue::ExternalLinkage; break; 1044 } 1045 Lex.Lex(); 1046 HasLinkage = true; 1047 return false; 1048} 1049 1050/// ParseOptionalVisibility 1051/// ::= /*empty*/ 1052/// ::= 'default' 1053/// ::= 'hidden' 1054/// ::= 'protected' 1055/// 1056bool LLParser::ParseOptionalVisibility(unsigned &Res) { 1057 switch (Lex.getKind()) { 1058 default: Res = GlobalValue::DefaultVisibility; return false; 1059 case lltok::kw_default: Res = GlobalValue::DefaultVisibility; break; 1060 case lltok::kw_hidden: Res = GlobalValue::HiddenVisibility; break; 1061 case lltok::kw_protected: Res = GlobalValue::ProtectedVisibility; break; 1062 } 1063 Lex.Lex(); 1064 return false; 1065} 1066 1067/// ParseOptionalCallingConv 1068/// ::= /*empty*/ 1069/// ::= 'ccc' 1070/// ::= 'fastcc' 1071/// ::= 'coldcc' 1072/// ::= 'x86_stdcallcc' 1073/// ::= 'x86_fastcallcc' 1074/// ::= 'arm_apcscc' 1075/// ::= 'arm_aapcscc' 1076/// ::= 'arm_aapcs_vfpcc' 1077/// ::= 'msp430_intrcc' 1078/// ::= 'cc' UINT 1079/// 1080bool LLParser::ParseOptionalCallingConv(CallingConv::ID &CC) { 1081 switch (Lex.getKind()) { 1082 default: CC = CallingConv::C; return false; 1083 case lltok::kw_ccc: CC = CallingConv::C; break; 1084 case lltok::kw_fastcc: CC = CallingConv::Fast; break; 1085 case lltok::kw_coldcc: CC = CallingConv::Cold; break; 1086 case lltok::kw_x86_stdcallcc: CC = CallingConv::X86_StdCall; break; 1087 case lltok::kw_x86_fastcallcc: CC = CallingConv::X86_FastCall; break; 1088 case lltok::kw_arm_apcscc: CC = CallingConv::ARM_APCS; break; 1089 case lltok::kw_arm_aapcscc: CC = CallingConv::ARM_AAPCS; break; 1090 case lltok::kw_arm_aapcs_vfpcc:CC = CallingConv::ARM_AAPCS_VFP; break; 1091 case lltok::kw_msp430_intrcc: CC = CallingConv::MSP430_INTR; break; 1092 case lltok::kw_cc: { 1093 unsigned ArbitraryCC; 1094 Lex.Lex(); 1095 if (ParseUInt32(ArbitraryCC)) { 1096 return true; 1097 } else 1098 CC = static_cast<CallingConv::ID>(ArbitraryCC); 1099 return false; 1100 } 1101 break; 1102 } 1103 1104 Lex.Lex(); 1105 return false; 1106} 1107 1108/// ParseOptionalCustomMetadata 1109/// ::= /* empty */ 1110/// ::= !dbg !42 1111bool LLParser::ParseOptionalCustomMetadata() { 1112 if (Lex.getKind() != lltok::NamedOrCustomMD) 1113 return false; 1114 1115 std::string Name = Lex.getStrVal(); 1116 Lex.Lex(); 1117 1118 if (Lex.getKind() != lltok::Metadata) 1119 return TokError("Expected '!' here"); 1120 Lex.Lex(); 1121 1122 MetadataBase *Node; 1123 if (ParseMDNode(Node)) return true; 1124 1125 MetadataContext &TheMetadata = M->getContext().getMetadata(); 1126 unsigned MDK = TheMetadata.getMDKind(Name.c_str()); 1127 if (!MDK) 1128 MDK = TheMetadata.registerMDKind(Name.c_str()); 1129 MDsOnInst.push_back(std::make_pair(MDK, cast<MDNode>(Node))); 1130 1131 return false; 1132} 1133 1134/// ParseOptionalAlignment 1135/// ::= /* empty */ 1136/// ::= 'align' 4 1137bool LLParser::ParseOptionalAlignment(unsigned &Alignment) { 1138 Alignment = 0; 1139 if (!EatIfPresent(lltok::kw_align)) 1140 return false; 1141 LocTy AlignLoc = Lex.getLoc(); 1142 if (ParseUInt32(Alignment)) return true; 1143 if (!isPowerOf2_32(Alignment)) 1144 return Error(AlignLoc, "alignment is not a power of two"); 1145 return false; 1146} 1147 1148/// ParseOptionalInfo 1149/// ::= OptionalInfo (',' OptionalInfo)+ 1150bool LLParser::ParseOptionalInfo(unsigned &Alignment) { 1151 1152 // FIXME: Handle customized metadata info attached with an instruction. 1153 do { 1154 if (Lex.getKind() == lltok::NamedOrCustomMD) { 1155 if (ParseOptionalCustomMetadata()) return true; 1156 } else if (Lex.getKind() == lltok::kw_align) { 1157 if (ParseOptionalAlignment(Alignment)) return true; 1158 } else 1159 return true; 1160 } while (EatIfPresent(lltok::comma)); 1161 1162 return false; 1163} 1164 1165 1166/// ParseIndexList 1167/// ::= (',' uint32)+ 1168bool LLParser::ParseIndexList(SmallVectorImpl<unsigned> &Indices) { 1169 if (Lex.getKind() != lltok::comma) 1170 return TokError("expected ',' as start of index list"); 1171 1172 while (EatIfPresent(lltok::comma)) { 1173 if (Lex.getKind() == lltok::NamedOrCustomMD) 1174 break; 1175 unsigned Idx; 1176 if (ParseUInt32(Idx)) return true; 1177 Indices.push_back(Idx); 1178 } 1179 1180 return false; 1181} 1182 1183//===----------------------------------------------------------------------===// 1184// Type Parsing. 1185//===----------------------------------------------------------------------===// 1186 1187/// ParseType - Parse and resolve a full type. 1188bool LLParser::ParseType(PATypeHolder &Result, bool AllowVoid) { 1189 LocTy TypeLoc = Lex.getLoc(); 1190 if (ParseTypeRec(Result)) return true; 1191 1192 // Verify no unresolved uprefs. 1193 if (!UpRefs.empty()) 1194 return Error(UpRefs.back().Loc, "invalid unresolved type up reference"); 1195 1196 if (!AllowVoid && Result.get()->isVoidTy()) 1197 return Error(TypeLoc, "void type only allowed for function results"); 1198 1199 return false; 1200} 1201 1202/// HandleUpRefs - Every time we finish a new layer of types, this function is 1203/// called. It loops through the UpRefs vector, which is a list of the 1204/// currently active types. For each type, if the up-reference is contained in 1205/// the newly completed type, we decrement the level count. When the level 1206/// count reaches zero, the up-referenced type is the type that is passed in: 1207/// thus we can complete the cycle. 1208/// 1209PATypeHolder LLParser::HandleUpRefs(const Type *ty) { 1210 // If Ty isn't abstract, or if there are no up-references in it, then there is 1211 // nothing to resolve here. 1212 if (!ty->isAbstract() || UpRefs.empty()) return ty; 1213 1214 PATypeHolder Ty(ty); 1215#if 0 1216 errs() << "Type '" << Ty->getDescription() 1217 << "' newly formed. Resolving upreferences.\n" 1218 << UpRefs.size() << " upreferences active!\n"; 1219#endif 1220 1221 // If we find any resolvable upreferences (i.e., those whose NestingLevel goes 1222 // to zero), we resolve them all together before we resolve them to Ty. At 1223 // the end of the loop, if there is anything to resolve to Ty, it will be in 1224 // this variable. 1225 OpaqueType *TypeToResolve = 0; 1226 1227 for (unsigned i = 0; i != UpRefs.size(); ++i) { 1228 // Determine if 'Ty' directly contains this up-references 'LastContainedTy'. 1229 bool ContainsType = 1230 std::find(Ty->subtype_begin(), Ty->subtype_end(), 1231 UpRefs[i].LastContainedTy) != Ty->subtype_end(); 1232 1233#if 0 1234 errs() << " UR#" << i << " - TypeContains(" << Ty->getDescription() << ", " 1235 << UpRefs[i].LastContainedTy->getDescription() << ") = " 1236 << (ContainsType ? "true" : "false") 1237 << " level=" << UpRefs[i].NestingLevel << "\n"; 1238#endif 1239 if (!ContainsType) 1240 continue; 1241 1242 // Decrement level of upreference 1243 unsigned Level = --UpRefs[i].NestingLevel; 1244 UpRefs[i].LastContainedTy = Ty; 1245 1246 // If the Up-reference has a non-zero level, it shouldn't be resolved yet. 1247 if (Level != 0) 1248 continue; 1249 1250#if 0 1251 errs() << " * Resolving upreference for " << UpRefs[i].UpRefTy << "\n"; 1252#endif 1253 if (!TypeToResolve) 1254 TypeToResolve = UpRefs[i].UpRefTy; 1255 else 1256 UpRefs[i].UpRefTy->refineAbstractTypeTo(TypeToResolve); 1257 UpRefs.erase(UpRefs.begin()+i); // Remove from upreference list. 1258 --i; // Do not skip the next element. 1259 } 1260 1261 if (TypeToResolve) 1262 TypeToResolve->refineAbstractTypeTo(Ty); 1263 1264 return Ty; 1265} 1266 1267 1268/// ParseTypeRec - The recursive function used to process the internal 1269/// implementation details of types. 1270bool LLParser::ParseTypeRec(PATypeHolder &Result) { 1271 switch (Lex.getKind()) { 1272 default: 1273 return TokError("expected type"); 1274 case lltok::Type: 1275 // TypeRec ::= 'float' | 'void' (etc) 1276 Result = Lex.getTyVal(); 1277 Lex.Lex(); 1278 break; 1279 case lltok::kw_opaque: 1280 // TypeRec ::= 'opaque' 1281 Result = OpaqueType::get(Context); 1282 Lex.Lex(); 1283 break; 1284 case lltok::lbrace: 1285 // TypeRec ::= '{' ... '}' 1286 if (ParseStructType(Result, false)) 1287 return true; 1288 break; 1289 case lltok::lsquare: 1290 // TypeRec ::= '[' ... ']' 1291 Lex.Lex(); // eat the lsquare. 1292 if (ParseArrayVectorType(Result, false)) 1293 return true; 1294 break; 1295 case lltok::less: // Either vector or packed struct. 1296 // TypeRec ::= '<' ... '>' 1297 Lex.Lex(); 1298 if (Lex.getKind() == lltok::lbrace) { 1299 if (ParseStructType(Result, true) || 1300 ParseToken(lltok::greater, "expected '>' at end of packed struct")) 1301 return true; 1302 } else if (ParseArrayVectorType(Result, true)) 1303 return true; 1304 break; 1305 case lltok::LocalVar: 1306 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0 1307 // TypeRec ::= %foo 1308 if (const Type *T = M->getTypeByName(Lex.getStrVal())) { 1309 Result = T; 1310 } else { 1311 Result = OpaqueType::get(Context); 1312 ForwardRefTypes.insert(std::make_pair(Lex.getStrVal(), 1313 std::make_pair(Result, 1314 Lex.getLoc()))); 1315 M->addTypeName(Lex.getStrVal(), Result.get()); 1316 } 1317 Lex.Lex(); 1318 break; 1319 1320 case lltok::LocalVarID: 1321 // TypeRec ::= %4 1322 if (Lex.getUIntVal() < NumberedTypes.size()) 1323 Result = NumberedTypes[Lex.getUIntVal()]; 1324 else { 1325 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 1326 I = ForwardRefTypeIDs.find(Lex.getUIntVal()); 1327 if (I != ForwardRefTypeIDs.end()) 1328 Result = I->second.first; 1329 else { 1330 Result = OpaqueType::get(Context); 1331 ForwardRefTypeIDs.insert(std::make_pair(Lex.getUIntVal(), 1332 std::make_pair(Result, 1333 Lex.getLoc()))); 1334 } 1335 } 1336 Lex.Lex(); 1337 break; 1338 case lltok::backslash: { 1339 // TypeRec ::= '\' 4 1340 Lex.Lex(); 1341 unsigned Val; 1342 if (ParseUInt32(Val)) return true; 1343 OpaqueType *OT = OpaqueType::get(Context); //Use temporary placeholder. 1344 UpRefs.push_back(UpRefRecord(Lex.getLoc(), Val, OT)); 1345 Result = OT; 1346 break; 1347 } 1348 } 1349 1350 // Parse the type suffixes. 1351 while (1) { 1352 switch (Lex.getKind()) { 1353 // End of type. 1354 default: return false; 1355 1356 // TypeRec ::= TypeRec '*' 1357 case lltok::star: 1358 if (Result.get()->isLabelTy()) 1359 return TokError("basic block pointers are invalid"); 1360 if (Result.get()->isVoidTy()) 1361 return TokError("pointers to void are invalid; use i8* instead"); 1362 if (!PointerType::isValidElementType(Result.get())) 1363 return TokError("pointer to this type is invalid"); 1364 Result = HandleUpRefs(PointerType::getUnqual(Result.get())); 1365 Lex.Lex(); 1366 break; 1367 1368 // TypeRec ::= TypeRec 'addrspace' '(' uint32 ')' '*' 1369 case lltok::kw_addrspace: { 1370 if (Result.get()->isLabelTy()) 1371 return TokError("basic block pointers are invalid"); 1372 if (Result.get()->isVoidTy()) 1373 return TokError("pointers to void are invalid; use i8* instead"); 1374 if (!PointerType::isValidElementType(Result.get())) 1375 return TokError("pointer to this type is invalid"); 1376 unsigned AddrSpace; 1377 if (ParseOptionalAddrSpace(AddrSpace) || 1378 ParseToken(lltok::star, "expected '*' in address space")) 1379 return true; 1380 1381 Result = HandleUpRefs(PointerType::get(Result.get(), AddrSpace)); 1382 break; 1383 } 1384 1385 /// Types '(' ArgTypeListI ')' OptFuncAttrs 1386 case lltok::lparen: 1387 if (ParseFunctionType(Result)) 1388 return true; 1389 break; 1390 } 1391 } 1392} 1393 1394/// ParseParameterList 1395/// ::= '(' ')' 1396/// ::= '(' Arg (',' Arg)* ')' 1397/// Arg 1398/// ::= Type OptionalAttributes Value OptionalAttributes 1399bool LLParser::ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList, 1400 PerFunctionState &PFS) { 1401 if (ParseToken(lltok::lparen, "expected '(' in call")) 1402 return true; 1403 1404 while (Lex.getKind() != lltok::rparen) { 1405 // If this isn't the first argument, we need a comma. 1406 if (!ArgList.empty() && 1407 ParseToken(lltok::comma, "expected ',' in argument list")) 1408 return true; 1409 1410 // Parse the argument. 1411 LocTy ArgLoc; 1412 PATypeHolder ArgTy(Type::getVoidTy(Context)); 1413 unsigned ArgAttrs1 = Attribute::None; 1414 unsigned ArgAttrs2 = Attribute::None; 1415 Value *V; 1416 if (ParseType(ArgTy, ArgLoc)) 1417 return true; 1418 1419 if (Lex.getKind() == lltok::Metadata) { 1420 if (ParseInlineMetadata(V, PFS)) 1421 return true; 1422 } else { 1423 if (ParseOptionalAttrs(ArgAttrs1, 0) || 1424 ParseValue(ArgTy, V, PFS) || 1425 // FIXME: Should not allow attributes after the argument, remove this 1426 // in LLVM 3.0. 1427 ParseOptionalAttrs(ArgAttrs2, 3)) 1428 return true; 1429 } 1430 ArgList.push_back(ParamInfo(ArgLoc, V, ArgAttrs1|ArgAttrs2)); 1431 } 1432 1433 Lex.Lex(); // Lex the ')'. 1434 return false; 1435} 1436 1437 1438 1439/// ParseArgumentList - Parse the argument list for a function type or function 1440/// prototype. If 'inType' is true then we are parsing a FunctionType. 1441/// ::= '(' ArgTypeListI ')' 1442/// ArgTypeListI 1443/// ::= /*empty*/ 1444/// ::= '...' 1445/// ::= ArgTypeList ',' '...' 1446/// ::= ArgType (',' ArgType)* 1447/// 1448bool LLParser::ParseArgumentList(std::vector<ArgInfo> &ArgList, 1449 bool &isVarArg, bool inType) { 1450 isVarArg = false; 1451 assert(Lex.getKind() == lltok::lparen); 1452 Lex.Lex(); // eat the (. 1453 1454 if (Lex.getKind() == lltok::rparen) { 1455 // empty 1456 } else if (Lex.getKind() == lltok::dotdotdot) { 1457 isVarArg = true; 1458 Lex.Lex(); 1459 } else { 1460 LocTy TypeLoc = Lex.getLoc(); 1461 PATypeHolder ArgTy(Type::getVoidTy(Context)); 1462 unsigned Attrs; 1463 std::string Name; 1464 1465 // If we're parsing a type, use ParseTypeRec, because we allow recursive 1466 // types (such as a function returning a pointer to itself). If parsing a 1467 // function prototype, we require fully resolved types. 1468 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1469 ParseOptionalAttrs(Attrs, 0)) return true; 1470 1471 if (ArgTy->isVoidTy()) 1472 return Error(TypeLoc, "argument can not have void type"); 1473 1474 if (Lex.getKind() == lltok::LocalVar || 1475 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1476 Name = Lex.getStrVal(); 1477 Lex.Lex(); 1478 } 1479 1480 if (!FunctionType::isValidArgumentType(ArgTy)) 1481 return Error(TypeLoc, "invalid type for function argument"); 1482 1483 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1484 1485 while (EatIfPresent(lltok::comma)) { 1486 // Handle ... at end of arg list. 1487 if (EatIfPresent(lltok::dotdotdot)) { 1488 isVarArg = true; 1489 break; 1490 } 1491 1492 // Otherwise must be an argument type. 1493 TypeLoc = Lex.getLoc(); 1494 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1495 ParseOptionalAttrs(Attrs, 0)) return true; 1496 1497 if (ArgTy->isVoidTy()) 1498 return Error(TypeLoc, "argument can not have void type"); 1499 1500 if (Lex.getKind() == lltok::LocalVar || 1501 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1502 Name = Lex.getStrVal(); 1503 Lex.Lex(); 1504 } else { 1505 Name = ""; 1506 } 1507 1508 if (!ArgTy->isFirstClassType() && !isa<OpaqueType>(ArgTy)) 1509 return Error(TypeLoc, "invalid type for function argument"); 1510 1511 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1512 } 1513 } 1514 1515 return ParseToken(lltok::rparen, "expected ')' at end of argument list"); 1516} 1517 1518/// ParseFunctionType 1519/// ::= Type ArgumentList OptionalAttrs 1520bool LLParser::ParseFunctionType(PATypeHolder &Result) { 1521 assert(Lex.getKind() == lltok::lparen); 1522 1523 if (!FunctionType::isValidReturnType(Result)) 1524 return TokError("invalid function return type"); 1525 1526 std::vector<ArgInfo> ArgList; 1527 bool isVarArg; 1528 unsigned Attrs; 1529 if (ParseArgumentList(ArgList, isVarArg, true) || 1530 // FIXME: Allow, but ignore attributes on function types! 1531 // FIXME: Remove in LLVM 3.0 1532 ParseOptionalAttrs(Attrs, 2)) 1533 return true; 1534 1535 // Reject names on the arguments lists. 1536 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 1537 if (!ArgList[i].Name.empty()) 1538 return Error(ArgList[i].Loc, "argument name invalid in function type"); 1539 if (!ArgList[i].Attrs != 0) { 1540 // Allow but ignore attributes on function types; this permits 1541 // auto-upgrade. 1542 // FIXME: REJECT ATTRIBUTES ON FUNCTION TYPES in LLVM 3.0 1543 } 1544 } 1545 1546 std::vector<const Type*> ArgListTy; 1547 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 1548 ArgListTy.push_back(ArgList[i].Type); 1549 1550 Result = HandleUpRefs(FunctionType::get(Result.get(), 1551 ArgListTy, isVarArg)); 1552 return false; 1553} 1554 1555/// ParseStructType: Handles packed and unpacked types. </> parsed elsewhere. 1556/// TypeRec 1557/// ::= '{' '}' 1558/// ::= '{' TypeRec (',' TypeRec)* '}' 1559/// ::= '<' '{' '}' '>' 1560/// ::= '<' '{' TypeRec (',' TypeRec)* '}' '>' 1561bool LLParser::ParseStructType(PATypeHolder &Result, bool Packed) { 1562 assert(Lex.getKind() == lltok::lbrace); 1563 Lex.Lex(); // Consume the '{' 1564 1565 if (EatIfPresent(lltok::rbrace)) { 1566 Result = StructType::get(Context, Packed); 1567 return false; 1568 } 1569 1570 std::vector<PATypeHolder> ParamsList; 1571 LocTy EltTyLoc = Lex.getLoc(); 1572 if (ParseTypeRec(Result)) return true; 1573 ParamsList.push_back(Result); 1574 1575 if (Result->isVoidTy()) 1576 return Error(EltTyLoc, "struct element can not have void type"); 1577 if (!StructType::isValidElementType(Result)) 1578 return Error(EltTyLoc, "invalid element type for struct"); 1579 1580 while (EatIfPresent(lltok::comma)) { 1581 EltTyLoc = Lex.getLoc(); 1582 if (ParseTypeRec(Result)) return true; 1583 1584 if (Result->isVoidTy()) 1585 return Error(EltTyLoc, "struct element can not have void type"); 1586 if (!StructType::isValidElementType(Result)) 1587 return Error(EltTyLoc, "invalid element type for struct"); 1588 1589 ParamsList.push_back(Result); 1590 } 1591 1592 if (ParseToken(lltok::rbrace, "expected '}' at end of struct")) 1593 return true; 1594 1595 std::vector<const Type*> ParamsListTy; 1596 for (unsigned i = 0, e = ParamsList.size(); i != e; ++i) 1597 ParamsListTy.push_back(ParamsList[i].get()); 1598 Result = HandleUpRefs(StructType::get(Context, ParamsListTy, Packed)); 1599 return false; 1600} 1601 1602/// ParseArrayVectorType - Parse an array or vector type, assuming the first 1603/// token has already been consumed. 1604/// TypeRec 1605/// ::= '[' APSINTVAL 'x' Types ']' 1606/// ::= '<' APSINTVAL 'x' Types '>' 1607bool LLParser::ParseArrayVectorType(PATypeHolder &Result, bool isVector) { 1608 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned() || 1609 Lex.getAPSIntVal().getBitWidth() > 64) 1610 return TokError("expected number in address space"); 1611 1612 LocTy SizeLoc = Lex.getLoc(); 1613 uint64_t Size = Lex.getAPSIntVal().getZExtValue(); 1614 Lex.Lex(); 1615 1616 if (ParseToken(lltok::kw_x, "expected 'x' after element count")) 1617 return true; 1618 1619 LocTy TypeLoc = Lex.getLoc(); 1620 PATypeHolder EltTy(Type::getVoidTy(Context)); 1621 if (ParseTypeRec(EltTy)) return true; 1622 1623 if (EltTy->isVoidTy()) 1624 return Error(TypeLoc, "array and vector element type cannot be void"); 1625 1626 if (ParseToken(isVector ? lltok::greater : lltok::rsquare, 1627 "expected end of sequential type")) 1628 return true; 1629 1630 if (isVector) { 1631 if (Size == 0) 1632 return Error(SizeLoc, "zero element vector is illegal"); 1633 if ((unsigned)Size != Size) 1634 return Error(SizeLoc, "size too large for vector"); 1635 if (!VectorType::isValidElementType(EltTy)) 1636 return Error(TypeLoc, "vector element type must be fp or integer"); 1637 Result = VectorType::get(EltTy, unsigned(Size)); 1638 } else { 1639 if (!ArrayType::isValidElementType(EltTy)) 1640 return Error(TypeLoc, "invalid array element type"); 1641 Result = HandleUpRefs(ArrayType::get(EltTy, Size)); 1642 } 1643 return false; 1644} 1645 1646//===----------------------------------------------------------------------===// 1647// Function Semantic Analysis. 1648//===----------------------------------------------------------------------===// 1649 1650LLParser::PerFunctionState::PerFunctionState(LLParser &p, Function &f, 1651 int functionNumber) 1652 : P(p), F(f), FunctionNumber(functionNumber) { 1653 1654 // Insert unnamed arguments into the NumberedVals list. 1655 for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 1656 AI != E; ++AI) 1657 if (!AI->hasName()) 1658 NumberedVals.push_back(AI); 1659} 1660 1661LLParser::PerFunctionState::~PerFunctionState() { 1662 // If there were any forward referenced non-basicblock values, delete them. 1663 for (std::map<std::string, std::pair<Value*, LocTy> >::iterator 1664 I = ForwardRefVals.begin(), E = ForwardRefVals.end(); I != E; ++I) 1665 if (!isa<BasicBlock>(I->second.first)) { 1666 I->second.first->replaceAllUsesWith( 1667 UndefValue::get(I->second.first->getType())); 1668 delete I->second.first; 1669 I->second.first = 0; 1670 } 1671 1672 for (std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1673 I = ForwardRefValIDs.begin(), E = ForwardRefValIDs.end(); I != E; ++I) 1674 if (!isa<BasicBlock>(I->second.first)) { 1675 I->second.first->replaceAllUsesWith( 1676 UndefValue::get(I->second.first->getType())); 1677 delete I->second.first; 1678 I->second.first = 0; 1679 } 1680} 1681 1682bool LLParser::PerFunctionState::FinishFunction() { 1683 // Check to see if someone took the address of labels in this block. 1684 if (!P.ForwardRefBlockAddresses.empty()) { 1685 ValID FunctionID; 1686 if (!F.getName().empty()) { 1687 FunctionID.Kind = ValID::t_GlobalName; 1688 FunctionID.StrVal = F.getName(); 1689 } else { 1690 FunctionID.Kind = ValID::t_GlobalID; 1691 FunctionID.UIntVal = FunctionNumber; 1692 } 1693 1694 std::map<ValID, std::vector<std::pair<ValID, GlobalValue*> > >::iterator 1695 FRBAI = P.ForwardRefBlockAddresses.find(FunctionID); 1696 if (FRBAI != P.ForwardRefBlockAddresses.end()) { 1697 // Resolve all these references. 1698 if (P.ResolveForwardRefBlockAddresses(&F, FRBAI->second, this)) 1699 return true; 1700 1701 P.ForwardRefBlockAddresses.erase(FRBAI); 1702 } 1703 } 1704 1705 if (!ForwardRefVals.empty()) 1706 return P.Error(ForwardRefVals.begin()->second.second, 1707 "use of undefined value '%" + ForwardRefVals.begin()->first + 1708 "'"); 1709 if (!ForwardRefValIDs.empty()) 1710 return P.Error(ForwardRefValIDs.begin()->second.second, 1711 "use of undefined value '%" + 1712 utostr(ForwardRefValIDs.begin()->first) + "'"); 1713 return false; 1714} 1715 1716 1717/// GetVal - Get a value with the specified name or ID, creating a 1718/// forward reference record if needed. This can return null if the value 1719/// exists but does not have the right type. 1720Value *LLParser::PerFunctionState::GetVal(const std::string &Name, 1721 const Type *Ty, LocTy Loc) { 1722 // Look this name up in the normal function symbol table. 1723 Value *Val = F.getValueSymbolTable().lookup(Name); 1724 1725 // If this is a forward reference for the value, see if we already created a 1726 // forward ref record. 1727 if (Val == 0) { 1728 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1729 I = ForwardRefVals.find(Name); 1730 if (I != ForwardRefVals.end()) 1731 Val = I->second.first; 1732 } 1733 1734 // If we have the value in the symbol table or fwd-ref table, return it. 1735 if (Val) { 1736 if (Val->getType() == Ty) return Val; 1737 if (Ty->isLabelTy()) 1738 P.Error(Loc, "'%" + Name + "' is not a basic block"); 1739 else 1740 P.Error(Loc, "'%" + Name + "' defined with type '" + 1741 Val->getType()->getDescription() + "'"); 1742 return 0; 1743 } 1744 1745 // Don't make placeholders with invalid type. 1746 if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty) && 1747 Ty != Type::getLabelTy(F.getContext())) { 1748 P.Error(Loc, "invalid use of a non-first-class type"); 1749 return 0; 1750 } 1751 1752 // Otherwise, create a new forward reference for this value and remember it. 1753 Value *FwdVal; 1754 if (Ty->isLabelTy()) 1755 FwdVal = BasicBlock::Create(F.getContext(), Name, &F); 1756 else 1757 FwdVal = new Argument(Ty, Name); 1758 1759 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 1760 return FwdVal; 1761} 1762 1763Value *LLParser::PerFunctionState::GetVal(unsigned ID, const Type *Ty, 1764 LocTy Loc) { 1765 // Look this name up in the normal function symbol table. 1766 Value *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 1767 1768 // If this is a forward reference for the value, see if we already created a 1769 // forward ref record. 1770 if (Val == 0) { 1771 std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1772 I = ForwardRefValIDs.find(ID); 1773 if (I != ForwardRefValIDs.end()) 1774 Val = I->second.first; 1775 } 1776 1777 // If we have the value in the symbol table or fwd-ref table, return it. 1778 if (Val) { 1779 if (Val->getType() == Ty) return Val; 1780 if (Ty->isLabelTy()) 1781 P.Error(Loc, "'%" + utostr(ID) + "' is not a basic block"); 1782 else 1783 P.Error(Loc, "'%" + utostr(ID) + "' defined with type '" + 1784 Val->getType()->getDescription() + "'"); 1785 return 0; 1786 } 1787 1788 if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty) && 1789 Ty != Type::getLabelTy(F.getContext())) { 1790 P.Error(Loc, "invalid use of a non-first-class type"); 1791 return 0; 1792 } 1793 1794 // Otherwise, create a new forward reference for this value and remember it. 1795 Value *FwdVal; 1796 if (Ty->isLabelTy()) 1797 FwdVal = BasicBlock::Create(F.getContext(), "", &F); 1798 else 1799 FwdVal = new Argument(Ty); 1800 1801 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 1802 return FwdVal; 1803} 1804 1805/// SetInstName - After an instruction is parsed and inserted into its 1806/// basic block, this installs its name. 1807bool LLParser::PerFunctionState::SetInstName(int NameID, 1808 const std::string &NameStr, 1809 LocTy NameLoc, Instruction *Inst) { 1810 // If this instruction has void type, it cannot have a name or ID specified. 1811 if (Inst->getType()->isVoidTy()) { 1812 if (NameID != -1 || !NameStr.empty()) 1813 return P.Error(NameLoc, "instructions returning void cannot have a name"); 1814 return false; 1815 } 1816 1817 // If this was a numbered instruction, verify that the instruction is the 1818 // expected value and resolve any forward references. 1819 if (NameStr.empty()) { 1820 // If neither a name nor an ID was specified, just use the next ID. 1821 if (NameID == -1) 1822 NameID = NumberedVals.size(); 1823 1824 if (unsigned(NameID) != NumberedVals.size()) 1825 return P.Error(NameLoc, "instruction expected to be numbered '%" + 1826 utostr(NumberedVals.size()) + "'"); 1827 1828 std::map<unsigned, std::pair<Value*, LocTy> >::iterator FI = 1829 ForwardRefValIDs.find(NameID); 1830 if (FI != ForwardRefValIDs.end()) { 1831 if (FI->second.first->getType() != Inst->getType()) 1832 return P.Error(NameLoc, "instruction forward referenced with type '" + 1833 FI->second.first->getType()->getDescription() + "'"); 1834 FI->second.first->replaceAllUsesWith(Inst); 1835 delete FI->second.first; 1836 ForwardRefValIDs.erase(FI); 1837 } 1838 1839 NumberedVals.push_back(Inst); 1840 return false; 1841 } 1842 1843 // Otherwise, the instruction had a name. Resolve forward refs and set it. 1844 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1845 FI = ForwardRefVals.find(NameStr); 1846 if (FI != ForwardRefVals.end()) { 1847 if (FI->second.first->getType() != Inst->getType()) 1848 return P.Error(NameLoc, "instruction forward referenced with type '" + 1849 FI->second.first->getType()->getDescription() + "'"); 1850 FI->second.first->replaceAllUsesWith(Inst); 1851 delete FI->second.first; 1852 ForwardRefVals.erase(FI); 1853 } 1854 1855 // Set the name on the instruction. 1856 Inst->setName(NameStr); 1857 1858 if (Inst->getNameStr() != NameStr) 1859 return P.Error(NameLoc, "multiple definition of local value named '" + 1860 NameStr + "'"); 1861 return false; 1862} 1863 1864/// GetBB - Get a basic block with the specified name or ID, creating a 1865/// forward reference record if needed. 1866BasicBlock *LLParser::PerFunctionState::GetBB(const std::string &Name, 1867 LocTy Loc) { 1868 return cast_or_null<BasicBlock>(GetVal(Name, 1869 Type::getLabelTy(F.getContext()), Loc)); 1870} 1871 1872BasicBlock *LLParser::PerFunctionState::GetBB(unsigned ID, LocTy Loc) { 1873 return cast_or_null<BasicBlock>(GetVal(ID, 1874 Type::getLabelTy(F.getContext()), Loc)); 1875} 1876 1877/// DefineBB - Define the specified basic block, which is either named or 1878/// unnamed. If there is an error, this returns null otherwise it returns 1879/// the block being defined. 1880BasicBlock *LLParser::PerFunctionState::DefineBB(const std::string &Name, 1881 LocTy Loc) { 1882 BasicBlock *BB; 1883 if (Name.empty()) 1884 BB = GetBB(NumberedVals.size(), Loc); 1885 else 1886 BB = GetBB(Name, Loc); 1887 if (BB == 0) return 0; // Already diagnosed error. 1888 1889 // Move the block to the end of the function. Forward ref'd blocks are 1890 // inserted wherever they happen to be referenced. 1891 F.getBasicBlockList().splice(F.end(), F.getBasicBlockList(), BB); 1892 1893 // Remove the block from forward ref sets. 1894 if (Name.empty()) { 1895 ForwardRefValIDs.erase(NumberedVals.size()); 1896 NumberedVals.push_back(BB); 1897 } else { 1898 // BB forward references are already in the function symbol table. 1899 ForwardRefVals.erase(Name); 1900 } 1901 1902 return BB; 1903} 1904 1905//===----------------------------------------------------------------------===// 1906// Constants. 1907//===----------------------------------------------------------------------===// 1908 1909/// ParseValID - Parse an abstract value that doesn't necessarily have a 1910/// type implied. For example, if we parse "4" we don't know what integer type 1911/// it has. The value will later be combined with its type and checked for 1912/// sanity. 1913bool LLParser::ParseValID(ValID &ID) { 1914 ID.Loc = Lex.getLoc(); 1915 switch (Lex.getKind()) { 1916 default: return TokError("expected value token"); 1917 case lltok::GlobalID: // @42 1918 ID.UIntVal = Lex.getUIntVal(); 1919 ID.Kind = ValID::t_GlobalID; 1920 break; 1921 case lltok::GlobalVar: // @foo 1922 ID.StrVal = Lex.getStrVal(); 1923 ID.Kind = ValID::t_GlobalName; 1924 break; 1925 case lltok::LocalVarID: // %42 1926 ID.UIntVal = Lex.getUIntVal(); 1927 ID.Kind = ValID::t_LocalID; 1928 break; 1929 case lltok::LocalVar: // %foo 1930 case lltok::StringConstant: // "foo" - FIXME: REMOVE IN LLVM 3.0 1931 ID.StrVal = Lex.getStrVal(); 1932 ID.Kind = ValID::t_LocalName; 1933 break; 1934 case lltok::Metadata: { // !{...} MDNode, !"foo" MDString 1935 ID.Kind = ValID::t_Metadata; 1936 Lex.Lex(); 1937 if (Lex.getKind() == lltok::lbrace) { 1938 SmallVector<Value*, 16> Elts; 1939 if (ParseMDNodeVector(Elts) || 1940 ParseToken(lltok::rbrace, "expected end of metadata node")) 1941 return true; 1942 1943 ID.MetadataVal = MDNode::get(Context, Elts.data(), Elts.size()); 1944 return false; 1945 } 1946 1947 // Standalone metadata reference 1948 // !{ ..., !42, ... } 1949 if (!ParseMDNode(ID.MetadataVal)) 1950 return false; 1951 1952 // MDString: 1953 // ::= '!' STRINGCONSTANT 1954 if (ParseMDString(ID.MetadataVal)) return true; 1955 ID.Kind = ValID::t_Metadata; 1956 return false; 1957 } 1958 case lltok::APSInt: 1959 ID.APSIntVal = Lex.getAPSIntVal(); 1960 ID.Kind = ValID::t_APSInt; 1961 break; 1962 case lltok::APFloat: 1963 ID.APFloatVal = Lex.getAPFloatVal(); 1964 ID.Kind = ValID::t_APFloat; 1965 break; 1966 case lltok::kw_true: 1967 ID.ConstantVal = ConstantInt::getTrue(Context); 1968 ID.Kind = ValID::t_Constant; 1969 break; 1970 case lltok::kw_false: 1971 ID.ConstantVal = ConstantInt::getFalse(Context); 1972 ID.Kind = ValID::t_Constant; 1973 break; 1974 case lltok::kw_null: ID.Kind = ValID::t_Null; break; 1975 case lltok::kw_undef: ID.Kind = ValID::t_Undef; break; 1976 case lltok::kw_zeroinitializer: ID.Kind = ValID::t_Zero; break; 1977 1978 case lltok::lbrace: { 1979 // ValID ::= '{' ConstVector '}' 1980 Lex.Lex(); 1981 SmallVector<Constant*, 16> Elts; 1982 if (ParseGlobalValueVector(Elts) || 1983 ParseToken(lltok::rbrace, "expected end of struct constant")) 1984 return true; 1985 1986 ID.ConstantVal = ConstantStruct::get(Context, Elts.data(), 1987 Elts.size(), false); 1988 ID.Kind = ValID::t_Constant; 1989 return false; 1990 } 1991 case lltok::less: { 1992 // ValID ::= '<' ConstVector '>' --> Vector. 1993 // ValID ::= '<' '{' ConstVector '}' '>' --> Packed Struct. 1994 Lex.Lex(); 1995 bool isPackedStruct = EatIfPresent(lltok::lbrace); 1996 1997 SmallVector<Constant*, 16> Elts; 1998 LocTy FirstEltLoc = Lex.getLoc(); 1999 if (ParseGlobalValueVector(Elts) || 2000 (isPackedStruct && 2001 ParseToken(lltok::rbrace, "expected end of packed struct")) || 2002 ParseToken(lltok::greater, "expected end of constant")) 2003 return true; 2004 2005 if (isPackedStruct) { 2006 ID.ConstantVal = 2007 ConstantStruct::get(Context, Elts.data(), Elts.size(), true); 2008 ID.Kind = ValID::t_Constant; 2009 return false; 2010 } 2011 2012 if (Elts.empty()) 2013 return Error(ID.Loc, "constant vector must not be empty"); 2014 2015 if (!Elts[0]->getType()->isInteger() && 2016 !Elts[0]->getType()->isFloatingPoint()) 2017 return Error(FirstEltLoc, 2018 "vector elements must have integer or floating point type"); 2019 2020 // Verify that all the vector elements have the same type. 2021 for (unsigned i = 1, e = Elts.size(); i != e; ++i) 2022 if (Elts[i]->getType() != Elts[0]->getType()) 2023 return Error(FirstEltLoc, 2024 "vector element #" + utostr(i) + 2025 " is not of type '" + Elts[0]->getType()->getDescription()); 2026 2027 ID.ConstantVal = ConstantVector::get(Elts.data(), Elts.size()); 2028 ID.Kind = ValID::t_Constant; 2029 return false; 2030 } 2031 case lltok::lsquare: { // Array Constant 2032 Lex.Lex(); 2033 SmallVector<Constant*, 16> Elts; 2034 LocTy FirstEltLoc = Lex.getLoc(); 2035 if (ParseGlobalValueVector(Elts) || 2036 ParseToken(lltok::rsquare, "expected end of array constant")) 2037 return true; 2038 2039 // Handle empty element. 2040 if (Elts.empty()) { 2041 // Use undef instead of an array because it's inconvenient to determine 2042 // the element type at this point, there being no elements to examine. 2043 ID.Kind = ValID::t_EmptyArray; 2044 return false; 2045 } 2046 2047 if (!Elts[0]->getType()->isFirstClassType()) 2048 return Error(FirstEltLoc, "invalid array element type: " + 2049 Elts[0]->getType()->getDescription()); 2050 2051 ArrayType *ATy = ArrayType::get(Elts[0]->getType(), Elts.size()); 2052 2053 // Verify all elements are correct type! 2054 for (unsigned i = 0, e = Elts.size(); i != e; ++i) { 2055 if (Elts[i]->getType() != Elts[0]->getType()) 2056 return Error(FirstEltLoc, 2057 "array element #" + utostr(i) + 2058 " is not of type '" +Elts[0]->getType()->getDescription()); 2059 } 2060 2061 ID.ConstantVal = ConstantArray::get(ATy, Elts.data(), Elts.size()); 2062 ID.Kind = ValID::t_Constant; 2063 return false; 2064 } 2065 case lltok::kw_c: // c "foo" 2066 Lex.Lex(); 2067 ID.ConstantVal = ConstantArray::get(Context, Lex.getStrVal(), false); 2068 if (ParseToken(lltok::StringConstant, "expected string")) return true; 2069 ID.Kind = ValID::t_Constant; 2070 return false; 2071 2072 case lltok::kw_asm: { 2073 // ValID ::= 'asm' SideEffect? AlignStack? STRINGCONSTANT ',' STRINGCONSTANT 2074 bool HasSideEffect, AlignStack; 2075 Lex.Lex(); 2076 if (ParseOptionalToken(lltok::kw_sideeffect, HasSideEffect) || 2077 ParseOptionalToken(lltok::kw_alignstack, AlignStack) || 2078 ParseStringConstant(ID.StrVal) || 2079 ParseToken(lltok::comma, "expected comma in inline asm expression") || 2080 ParseToken(lltok::StringConstant, "expected constraint string")) 2081 return true; 2082 ID.StrVal2 = Lex.getStrVal(); 2083 ID.UIntVal = unsigned(HasSideEffect) | (unsigned(AlignStack)<<1); 2084 ID.Kind = ValID::t_InlineAsm; 2085 return false; 2086 } 2087 2088 case lltok::kw_blockaddress: { 2089 // ValID ::= 'blockaddress' '(' @foo ',' %bar ')' 2090 Lex.Lex(); 2091 2092 ValID Fn, Label; 2093 LocTy FnLoc, LabelLoc; 2094 2095 if (ParseToken(lltok::lparen, "expected '(' in block address expression") || 2096 ParseValID(Fn) || 2097 ParseToken(lltok::comma, "expected comma in block address expression")|| 2098 ParseValID(Label) || 2099 ParseToken(lltok::rparen, "expected ')' in block address expression")) 2100 return true; 2101 2102 if (Fn.Kind != ValID::t_GlobalID && Fn.Kind != ValID::t_GlobalName) 2103 return Error(Fn.Loc, "expected function name in blockaddress"); 2104 if (Label.Kind != ValID::t_LocalID && Label.Kind != ValID::t_LocalName) 2105 return Error(Label.Loc, "expected basic block name in blockaddress"); 2106 2107 // Make a global variable as a placeholder for this reference. 2108 GlobalVariable *FwdRef = new GlobalVariable(*M, Type::getInt8Ty(Context), 2109 false, GlobalValue::InternalLinkage, 2110 0, ""); 2111 ForwardRefBlockAddresses[Fn].push_back(std::make_pair(Label, FwdRef)); 2112 ID.ConstantVal = FwdRef; 2113 ID.Kind = ValID::t_Constant; 2114 return false; 2115 } 2116 2117 case lltok::kw_trunc: 2118 case lltok::kw_zext: 2119 case lltok::kw_sext: 2120 case lltok::kw_fptrunc: 2121 case lltok::kw_fpext: 2122 case lltok::kw_bitcast: 2123 case lltok::kw_uitofp: 2124 case lltok::kw_sitofp: 2125 case lltok::kw_fptoui: 2126 case lltok::kw_fptosi: 2127 case lltok::kw_inttoptr: 2128 case lltok::kw_ptrtoint: { 2129 unsigned Opc = Lex.getUIntVal(); 2130 PATypeHolder DestTy(Type::getVoidTy(Context)); 2131 Constant *SrcVal; 2132 Lex.Lex(); 2133 if (ParseToken(lltok::lparen, "expected '(' after constantexpr cast") || 2134 ParseGlobalTypeAndValue(SrcVal) || 2135 ParseToken(lltok::kw_to, "expected 'to' in constantexpr cast") || 2136 ParseType(DestTy) || 2137 ParseToken(lltok::rparen, "expected ')' at end of constantexpr cast")) 2138 return true; 2139 if (!CastInst::castIsValid((Instruction::CastOps)Opc, SrcVal, DestTy)) 2140 return Error(ID.Loc, "invalid cast opcode for cast from '" + 2141 SrcVal->getType()->getDescription() + "' to '" + 2142 DestTy->getDescription() + "'"); 2143 ID.ConstantVal = ConstantExpr::getCast((Instruction::CastOps)Opc, 2144 SrcVal, DestTy); 2145 ID.Kind = ValID::t_Constant; 2146 return false; 2147 } 2148 case lltok::kw_extractvalue: { 2149 Lex.Lex(); 2150 Constant *Val; 2151 SmallVector<unsigned, 4> Indices; 2152 if (ParseToken(lltok::lparen, "expected '(' in extractvalue constantexpr")|| 2153 ParseGlobalTypeAndValue(Val) || 2154 ParseIndexList(Indices) || 2155 ParseToken(lltok::rparen, "expected ')' in extractvalue constantexpr")) 2156 return true; 2157 if (Lex.getKind() == lltok::NamedOrCustomMD) 2158 if (ParseOptionalCustomMetadata()) return true; 2159 2160 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 2161 return Error(ID.Loc, "extractvalue operand must be array or struct"); 2162 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 2163 Indices.end())) 2164 return Error(ID.Loc, "invalid indices for extractvalue"); 2165 ID.ConstantVal = 2166 ConstantExpr::getExtractValue(Val, Indices.data(), Indices.size()); 2167 ID.Kind = ValID::t_Constant; 2168 return false; 2169 } 2170 case lltok::kw_insertvalue: { 2171 Lex.Lex(); 2172 Constant *Val0, *Val1; 2173 SmallVector<unsigned, 4> Indices; 2174 if (ParseToken(lltok::lparen, "expected '(' in insertvalue constantexpr")|| 2175 ParseGlobalTypeAndValue(Val0) || 2176 ParseToken(lltok::comma, "expected comma in insertvalue constantexpr")|| 2177 ParseGlobalTypeAndValue(Val1) || 2178 ParseIndexList(Indices) || 2179 ParseToken(lltok::rparen, "expected ')' in insertvalue constantexpr")) 2180 return true; 2181 if (Lex.getKind() == lltok::NamedOrCustomMD) 2182 if (ParseOptionalCustomMetadata()) return true; 2183 if (!isa<StructType>(Val0->getType()) && !isa<ArrayType>(Val0->getType())) 2184 return Error(ID.Loc, "extractvalue operand must be array or struct"); 2185 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 2186 Indices.end())) 2187 return Error(ID.Loc, "invalid indices for insertvalue"); 2188 ID.ConstantVal = ConstantExpr::getInsertValue(Val0, Val1, 2189 Indices.data(), Indices.size()); 2190 ID.Kind = ValID::t_Constant; 2191 return false; 2192 } 2193 case lltok::kw_icmp: 2194 case lltok::kw_fcmp: { 2195 unsigned PredVal, Opc = Lex.getUIntVal(); 2196 Constant *Val0, *Val1; 2197 Lex.Lex(); 2198 if (ParseCmpPredicate(PredVal, Opc) || 2199 ParseToken(lltok::lparen, "expected '(' in compare constantexpr") || 2200 ParseGlobalTypeAndValue(Val0) || 2201 ParseToken(lltok::comma, "expected comma in compare constantexpr") || 2202 ParseGlobalTypeAndValue(Val1) || 2203 ParseToken(lltok::rparen, "expected ')' in compare constantexpr")) 2204 return true; 2205 2206 if (Val0->getType() != Val1->getType()) 2207 return Error(ID.Loc, "compare operands must have the same type"); 2208 2209 CmpInst::Predicate Pred = (CmpInst::Predicate)PredVal; 2210 2211 if (Opc == Instruction::FCmp) { 2212 if (!Val0->getType()->isFPOrFPVector()) 2213 return Error(ID.Loc, "fcmp requires floating point operands"); 2214 ID.ConstantVal = ConstantExpr::getFCmp(Pred, Val0, Val1); 2215 } else { 2216 assert(Opc == Instruction::ICmp && "Unexpected opcode for CmpInst!"); 2217 if (!Val0->getType()->isIntOrIntVector() && 2218 !isa<PointerType>(Val0->getType())) 2219 return Error(ID.Loc, "icmp requires pointer or integer operands"); 2220 ID.ConstantVal = ConstantExpr::getICmp(Pred, Val0, Val1); 2221 } 2222 ID.Kind = ValID::t_Constant; 2223 return false; 2224 } 2225 2226 // Binary Operators. 2227 case lltok::kw_add: 2228 case lltok::kw_fadd: 2229 case lltok::kw_sub: 2230 case lltok::kw_fsub: 2231 case lltok::kw_mul: 2232 case lltok::kw_fmul: 2233 case lltok::kw_udiv: 2234 case lltok::kw_sdiv: 2235 case lltok::kw_fdiv: 2236 case lltok::kw_urem: 2237 case lltok::kw_srem: 2238 case lltok::kw_frem: { 2239 bool NUW = false; 2240 bool NSW = false; 2241 bool Exact = false; 2242 unsigned Opc = Lex.getUIntVal(); 2243 Constant *Val0, *Val1; 2244 Lex.Lex(); 2245 LocTy ModifierLoc = Lex.getLoc(); 2246 if (Opc == Instruction::Add || 2247 Opc == Instruction::Sub || 2248 Opc == Instruction::Mul) { 2249 if (EatIfPresent(lltok::kw_nuw)) 2250 NUW = true; 2251 if (EatIfPresent(lltok::kw_nsw)) { 2252 NSW = true; 2253 if (EatIfPresent(lltok::kw_nuw)) 2254 NUW = true; 2255 } 2256 } else if (Opc == Instruction::SDiv) { 2257 if (EatIfPresent(lltok::kw_exact)) 2258 Exact = true; 2259 } 2260 if (ParseToken(lltok::lparen, "expected '(' in binary constantexpr") || 2261 ParseGlobalTypeAndValue(Val0) || 2262 ParseToken(lltok::comma, "expected comma in binary constantexpr") || 2263 ParseGlobalTypeAndValue(Val1) || 2264 ParseToken(lltok::rparen, "expected ')' in binary constantexpr")) 2265 return true; 2266 if (Val0->getType() != Val1->getType()) 2267 return Error(ID.Loc, "operands of constexpr must have same type"); 2268 if (!Val0->getType()->isIntOrIntVector()) { 2269 if (NUW) 2270 return Error(ModifierLoc, "nuw only applies to integer operations"); 2271 if (NSW) 2272 return Error(ModifierLoc, "nsw only applies to integer operations"); 2273 } 2274 // API compatibility: Accept either integer or floating-point types with 2275 // add, sub, and mul. 2276 if (!Val0->getType()->isIntOrIntVector() && 2277 !Val0->getType()->isFPOrFPVector()) 2278 return Error(ID.Loc,"constexpr requires integer, fp, or vector operands"); 2279 unsigned Flags = 0; 2280 if (NUW) Flags |= OverflowingBinaryOperator::NoUnsignedWrap; 2281 if (NSW) Flags |= OverflowingBinaryOperator::NoSignedWrap; 2282 if (Exact) Flags |= SDivOperator::IsExact; 2283 Constant *C = ConstantExpr::get(Opc, Val0, Val1, Flags); 2284 ID.ConstantVal = C; 2285 ID.Kind = ValID::t_Constant; 2286 return false; 2287 } 2288 2289 // Logical Operations 2290 case lltok::kw_shl: 2291 case lltok::kw_lshr: 2292 case lltok::kw_ashr: 2293 case lltok::kw_and: 2294 case lltok::kw_or: 2295 case lltok::kw_xor: { 2296 unsigned Opc = Lex.getUIntVal(); 2297 Constant *Val0, *Val1; 2298 Lex.Lex(); 2299 if (ParseToken(lltok::lparen, "expected '(' in logical constantexpr") || 2300 ParseGlobalTypeAndValue(Val0) || 2301 ParseToken(lltok::comma, "expected comma in logical constantexpr") || 2302 ParseGlobalTypeAndValue(Val1) || 2303 ParseToken(lltok::rparen, "expected ')' in logical constantexpr")) 2304 return true; 2305 if (Val0->getType() != Val1->getType()) 2306 return Error(ID.Loc, "operands of constexpr must have same type"); 2307 if (!Val0->getType()->isIntOrIntVector()) 2308 return Error(ID.Loc, 2309 "constexpr requires integer or integer vector operands"); 2310 ID.ConstantVal = ConstantExpr::get(Opc, Val0, Val1); 2311 ID.Kind = ValID::t_Constant; 2312 return false; 2313 } 2314 2315 case lltok::kw_getelementptr: 2316 case lltok::kw_shufflevector: 2317 case lltok::kw_insertelement: 2318 case lltok::kw_extractelement: 2319 case lltok::kw_select: { 2320 unsigned Opc = Lex.getUIntVal(); 2321 SmallVector<Constant*, 16> Elts; 2322 bool InBounds = false; 2323 Lex.Lex(); 2324 if (Opc == Instruction::GetElementPtr) 2325 InBounds = EatIfPresent(lltok::kw_inbounds); 2326 if (ParseToken(lltok::lparen, "expected '(' in constantexpr") || 2327 ParseGlobalValueVector(Elts) || 2328 ParseToken(lltok::rparen, "expected ')' in constantexpr")) 2329 return true; 2330 2331 if (Opc == Instruction::GetElementPtr) { 2332 if (Elts.size() == 0 || !isa<PointerType>(Elts[0]->getType())) 2333 return Error(ID.Loc, "getelementptr requires pointer operand"); 2334 2335 if (!GetElementPtrInst::getIndexedType(Elts[0]->getType(), 2336 (Value**)(Elts.data() + 1), 2337 Elts.size() - 1)) 2338 return Error(ID.Loc, "invalid indices for getelementptr"); 2339 ID.ConstantVal = InBounds ? 2340 ConstantExpr::getInBoundsGetElementPtr(Elts[0], 2341 Elts.data() + 1, 2342 Elts.size() - 1) : 2343 ConstantExpr::getGetElementPtr(Elts[0], 2344 Elts.data() + 1, Elts.size() - 1); 2345 } else if (Opc == Instruction::Select) { 2346 if (Elts.size() != 3) 2347 return Error(ID.Loc, "expected three operands to select"); 2348 if (const char *Reason = SelectInst::areInvalidOperands(Elts[0], Elts[1], 2349 Elts[2])) 2350 return Error(ID.Loc, Reason); 2351 ID.ConstantVal = ConstantExpr::getSelect(Elts[0], Elts[1], Elts[2]); 2352 } else if (Opc == Instruction::ShuffleVector) { 2353 if (Elts.size() != 3) 2354 return Error(ID.Loc, "expected three operands to shufflevector"); 2355 if (!ShuffleVectorInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2356 return Error(ID.Loc, "invalid operands to shufflevector"); 2357 ID.ConstantVal = 2358 ConstantExpr::getShuffleVector(Elts[0], Elts[1],Elts[2]); 2359 } else if (Opc == Instruction::ExtractElement) { 2360 if (Elts.size() != 2) 2361 return Error(ID.Loc, "expected two operands to extractelement"); 2362 if (!ExtractElementInst::isValidOperands(Elts[0], Elts[1])) 2363 return Error(ID.Loc, "invalid extractelement operands"); 2364 ID.ConstantVal = ConstantExpr::getExtractElement(Elts[0], Elts[1]); 2365 } else { 2366 assert(Opc == Instruction::InsertElement && "Unknown opcode"); 2367 if (Elts.size() != 3) 2368 return Error(ID.Loc, "expected three operands to insertelement"); 2369 if (!InsertElementInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2370 return Error(ID.Loc, "invalid insertelement operands"); 2371 ID.ConstantVal = 2372 ConstantExpr::getInsertElement(Elts[0], Elts[1],Elts[2]); 2373 } 2374 2375 ID.Kind = ValID::t_Constant; 2376 return false; 2377 } 2378 } 2379 2380 Lex.Lex(); 2381 return false; 2382} 2383 2384/// ParseGlobalValue - Parse a global value with the specified type. 2385bool LLParser::ParseGlobalValue(const Type *Ty, Constant *&V) { 2386 V = 0; 2387 ValID ID; 2388 return ParseValID(ID) || 2389 ConvertGlobalValIDToValue(Ty, ID, V); 2390} 2391 2392/// ConvertGlobalValIDToValue - Apply a type to a ValID to get a fully resolved 2393/// constant. 2394bool LLParser::ConvertGlobalValIDToValue(const Type *Ty, ValID &ID, 2395 Constant *&V) { 2396 if (isa<FunctionType>(Ty)) 2397 return Error(ID.Loc, "functions are not values, refer to them as pointers"); 2398 2399 switch (ID.Kind) { 2400 default: llvm_unreachable("Unknown ValID!"); 2401 case ValID::t_Metadata: 2402 return Error(ID.Loc, "invalid use of metadata"); 2403 case ValID::t_LocalID: 2404 case ValID::t_LocalName: 2405 return Error(ID.Loc, "invalid use of function-local name"); 2406 case ValID::t_InlineAsm: 2407 return Error(ID.Loc, "inline asm can only be an operand of call/invoke"); 2408 case ValID::t_GlobalName: 2409 V = GetGlobalVal(ID.StrVal, Ty, ID.Loc); 2410 return V == 0; 2411 case ValID::t_GlobalID: 2412 V = GetGlobalVal(ID.UIntVal, Ty, ID.Loc); 2413 return V == 0; 2414 case ValID::t_APSInt: 2415 if (!isa<IntegerType>(Ty)) 2416 return Error(ID.Loc, "integer constant must have integer type"); 2417 ID.APSIntVal.extOrTrunc(Ty->getPrimitiveSizeInBits()); 2418 V = ConstantInt::get(Context, ID.APSIntVal); 2419 return false; 2420 case ValID::t_APFloat: 2421 if (!Ty->isFloatingPoint() || 2422 !ConstantFP::isValueValidForType(Ty, ID.APFloatVal)) 2423 return Error(ID.Loc, "floating point constant invalid for type"); 2424 2425 // The lexer has no type info, so builds all float and double FP constants 2426 // as double. Fix this here. Long double does not need this. 2427 if (&ID.APFloatVal.getSemantics() == &APFloat::IEEEdouble && 2428 Ty->isFloatTy()) { 2429 bool Ignored; 2430 ID.APFloatVal.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, 2431 &Ignored); 2432 } 2433 V = ConstantFP::get(Context, ID.APFloatVal); 2434 2435 if (V->getType() != Ty) 2436 return Error(ID.Loc, "floating point constant does not have type '" + 2437 Ty->getDescription() + "'"); 2438 2439 return false; 2440 case ValID::t_Null: 2441 if (!isa<PointerType>(Ty)) 2442 return Error(ID.Loc, "null must be a pointer type"); 2443 V = ConstantPointerNull::get(cast<PointerType>(Ty)); 2444 return false; 2445 case ValID::t_Undef: 2446 // FIXME: LabelTy should not be a first-class type. 2447 if ((!Ty->isFirstClassType() || Ty->isLabelTy()) && 2448 !isa<OpaqueType>(Ty)) 2449 return Error(ID.Loc, "invalid type for undef constant"); 2450 V = UndefValue::get(Ty); 2451 return false; 2452 case ValID::t_EmptyArray: 2453 if (!isa<ArrayType>(Ty) || cast<ArrayType>(Ty)->getNumElements() != 0) 2454 return Error(ID.Loc, "invalid empty array initializer"); 2455 V = UndefValue::get(Ty); 2456 return false; 2457 case ValID::t_Zero: 2458 // FIXME: LabelTy should not be a first-class type. 2459 if (!Ty->isFirstClassType() || Ty->isLabelTy()) 2460 return Error(ID.Loc, "invalid type for null constant"); 2461 V = Constant::getNullValue(Ty); 2462 return false; 2463 case ValID::t_Constant: 2464 if (ID.ConstantVal->getType() != Ty) 2465 return Error(ID.Loc, "constant expression type mismatch"); 2466 V = ID.ConstantVal; 2467 return false; 2468 } 2469} 2470 2471bool LLParser::ParseGlobalTypeAndValue(Constant *&V) { 2472 PATypeHolder Type(Type::getVoidTy(Context)); 2473 return ParseType(Type) || 2474 ParseGlobalValue(Type, V); 2475} 2476 2477/// ParseGlobalValueVector 2478/// ::= /*empty*/ 2479/// ::= TypeAndValue (',' TypeAndValue)* 2480bool LLParser::ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts) { 2481 // Empty list. 2482 if (Lex.getKind() == lltok::rbrace || 2483 Lex.getKind() == lltok::rsquare || 2484 Lex.getKind() == lltok::greater || 2485 Lex.getKind() == lltok::rparen) 2486 return false; 2487 2488 Constant *C; 2489 if (ParseGlobalTypeAndValue(C)) return true; 2490 Elts.push_back(C); 2491 2492 while (EatIfPresent(lltok::comma)) { 2493 if (ParseGlobalTypeAndValue(C)) return true; 2494 Elts.push_back(C); 2495 } 2496 2497 return false; 2498} 2499 2500 2501//===----------------------------------------------------------------------===// 2502// Function Parsing. 2503//===----------------------------------------------------------------------===// 2504 2505bool LLParser::ConvertValIDToValue(const Type *Ty, ValID &ID, Value *&V, 2506 PerFunctionState &PFS) { 2507 if (ID.Kind == ValID::t_LocalID) 2508 V = PFS.GetVal(ID.UIntVal, Ty, ID.Loc); 2509 else if (ID.Kind == ValID::t_LocalName) 2510 V = PFS.GetVal(ID.StrVal, Ty, ID.Loc); 2511 else if (ID.Kind == ValID::t_InlineAsm) { 2512 const PointerType *PTy = dyn_cast<PointerType>(Ty); 2513 const FunctionType *FTy = 2514 PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : 0; 2515 if (!FTy || !InlineAsm::Verify(FTy, ID.StrVal2)) 2516 return Error(ID.Loc, "invalid type for inline asm constraint string"); 2517 V = InlineAsm::get(FTy, ID.StrVal, ID.StrVal2, ID.UIntVal&1, ID.UIntVal>>1); 2518 return false; 2519 } else if (ID.Kind == ValID::t_Metadata) { 2520 V = ID.MetadataVal; 2521 } else { 2522 Constant *C; 2523 if (ConvertGlobalValIDToValue(Ty, ID, C)) return true; 2524 V = C; 2525 return false; 2526 } 2527 2528 return V == 0; 2529} 2530 2531bool LLParser::ParseValue(const Type *Ty, Value *&V, PerFunctionState &PFS) { 2532 V = 0; 2533 ValID ID; 2534 return ParseValID(ID) || 2535 ConvertValIDToValue(Ty, ID, V, PFS); 2536} 2537 2538bool LLParser::ParseTypeAndValue(Value *&V, PerFunctionState &PFS) { 2539 PATypeHolder T(Type::getVoidTy(Context)); 2540 return ParseType(T) || 2541 ParseValue(T, V, PFS); 2542} 2543 2544bool LLParser::ParseTypeAndBasicBlock(BasicBlock *&BB, LocTy &Loc, 2545 PerFunctionState &PFS) { 2546 Value *V; 2547 Loc = Lex.getLoc(); 2548 if (ParseTypeAndValue(V, PFS)) return true; 2549 if (!isa<BasicBlock>(V)) 2550 return Error(Loc, "expected a basic block"); 2551 BB = cast<BasicBlock>(V); 2552 return false; 2553} 2554 2555 2556/// FunctionHeader 2557/// ::= OptionalLinkage OptionalVisibility OptionalCallingConv OptRetAttrs 2558/// Type GlobalName '(' ArgList ')' OptFuncAttrs OptSection 2559/// OptionalAlign OptGC 2560bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) { 2561 // Parse the linkage. 2562 LocTy LinkageLoc = Lex.getLoc(); 2563 unsigned Linkage; 2564 2565 unsigned Visibility, RetAttrs; 2566 CallingConv::ID CC; 2567 PATypeHolder RetType(Type::getVoidTy(Context)); 2568 LocTy RetTypeLoc = Lex.getLoc(); 2569 if (ParseOptionalLinkage(Linkage) || 2570 ParseOptionalVisibility(Visibility) || 2571 ParseOptionalCallingConv(CC) || 2572 ParseOptionalAttrs(RetAttrs, 1) || 2573 ParseType(RetType, RetTypeLoc, true /*void allowed*/)) 2574 return true; 2575 2576 // Verify that the linkage is ok. 2577 switch ((GlobalValue::LinkageTypes)Linkage) { 2578 case GlobalValue::ExternalLinkage: 2579 break; // always ok. 2580 case GlobalValue::DLLImportLinkage: 2581 case GlobalValue::ExternalWeakLinkage: 2582 if (isDefine) 2583 return Error(LinkageLoc, "invalid linkage for function definition"); 2584 break; 2585 case GlobalValue::PrivateLinkage: 2586 case GlobalValue::LinkerPrivateLinkage: 2587 case GlobalValue::InternalLinkage: 2588 case GlobalValue::AvailableExternallyLinkage: 2589 case GlobalValue::LinkOnceAnyLinkage: 2590 case GlobalValue::LinkOnceODRLinkage: 2591 case GlobalValue::WeakAnyLinkage: 2592 case GlobalValue::WeakODRLinkage: 2593 case GlobalValue::DLLExportLinkage: 2594 if (!isDefine) 2595 return Error(LinkageLoc, "invalid linkage for function declaration"); 2596 break; 2597 case GlobalValue::AppendingLinkage: 2598 case GlobalValue::GhostLinkage: 2599 case GlobalValue::CommonLinkage: 2600 return Error(LinkageLoc, "invalid function linkage type"); 2601 } 2602 2603 if (!FunctionType::isValidReturnType(RetType) || 2604 isa<OpaqueType>(RetType)) 2605 return Error(RetTypeLoc, "invalid function return type"); 2606 2607 LocTy NameLoc = Lex.getLoc(); 2608 2609 std::string FunctionName; 2610 if (Lex.getKind() == lltok::GlobalVar) { 2611 FunctionName = Lex.getStrVal(); 2612 } else if (Lex.getKind() == lltok::GlobalID) { // @42 is ok. 2613 unsigned NameID = Lex.getUIntVal(); 2614 2615 if (NameID != NumberedVals.size()) 2616 return TokError("function expected to be numbered '%" + 2617 utostr(NumberedVals.size()) + "'"); 2618 } else { 2619 return TokError("expected function name"); 2620 } 2621 2622 Lex.Lex(); 2623 2624 if (Lex.getKind() != lltok::lparen) 2625 return TokError("expected '(' in function argument list"); 2626 2627 std::vector<ArgInfo> ArgList; 2628 bool isVarArg; 2629 unsigned FuncAttrs; 2630 std::string Section; 2631 unsigned Alignment; 2632 std::string GC; 2633 2634 if (ParseArgumentList(ArgList, isVarArg, false) || 2635 ParseOptionalAttrs(FuncAttrs, 2) || 2636 (EatIfPresent(lltok::kw_section) && 2637 ParseStringConstant(Section)) || 2638 ParseOptionalAlignment(Alignment) || 2639 (EatIfPresent(lltok::kw_gc) && 2640 ParseStringConstant(GC))) 2641 return true; 2642 2643 // If the alignment was parsed as an attribute, move to the alignment field. 2644 if (FuncAttrs & Attribute::Alignment) { 2645 Alignment = Attribute::getAlignmentFromAttrs(FuncAttrs); 2646 FuncAttrs &= ~Attribute::Alignment; 2647 } 2648 2649 // Okay, if we got here, the function is syntactically valid. Convert types 2650 // and do semantic checks. 2651 std::vector<const Type*> ParamTypeList; 2652 SmallVector<AttributeWithIndex, 8> Attrs; 2653 // FIXME : In 3.0, stop accepting zext, sext and inreg as optional function 2654 // attributes. 2655 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 2656 if (FuncAttrs & ObsoleteFuncAttrs) { 2657 RetAttrs |= FuncAttrs & ObsoleteFuncAttrs; 2658 FuncAttrs &= ~ObsoleteFuncAttrs; 2659 } 2660 2661 if (RetAttrs != Attribute::None) 2662 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 2663 2664 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 2665 ParamTypeList.push_back(ArgList[i].Type); 2666 if (ArgList[i].Attrs != Attribute::None) 2667 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 2668 } 2669 2670 if (FuncAttrs != Attribute::None) 2671 Attrs.push_back(AttributeWithIndex::get(~0, FuncAttrs)); 2672 2673 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 2674 2675 if (PAL.paramHasAttr(1, Attribute::StructRet) && 2676 RetType != Type::getVoidTy(Context)) 2677 return Error(RetTypeLoc, "functions with 'sret' argument must return void"); 2678 2679 const FunctionType *FT = 2680 FunctionType::get(RetType, ParamTypeList, isVarArg); 2681 const PointerType *PFT = PointerType::getUnqual(FT); 2682 2683 Fn = 0; 2684 if (!FunctionName.empty()) { 2685 // If this was a definition of a forward reference, remove the definition 2686 // from the forward reference table and fill in the forward ref. 2687 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator FRVI = 2688 ForwardRefVals.find(FunctionName); 2689 if (FRVI != ForwardRefVals.end()) { 2690 Fn = M->getFunction(FunctionName); 2691 ForwardRefVals.erase(FRVI); 2692 } else if ((Fn = M->getFunction(FunctionName))) { 2693 // If this function already exists in the symbol table, then it is 2694 // multiply defined. We accept a few cases for old backwards compat. 2695 // FIXME: Remove this stuff for LLVM 3.0. 2696 if (Fn->getType() != PFT || Fn->getAttributes() != PAL || 2697 (!Fn->isDeclaration() && isDefine)) { 2698 // If the redefinition has different type or different attributes, 2699 // reject it. If both have bodies, reject it. 2700 return Error(NameLoc, "invalid redefinition of function '" + 2701 FunctionName + "'"); 2702 } else if (Fn->isDeclaration()) { 2703 // Make sure to strip off any argument names so we can't get conflicts. 2704 for (Function::arg_iterator AI = Fn->arg_begin(), AE = Fn->arg_end(); 2705 AI != AE; ++AI) 2706 AI->setName(""); 2707 } 2708 } else if (M->getNamedValue(FunctionName)) { 2709 return Error(NameLoc, "redefinition of function '@" + FunctionName + "'"); 2710 } 2711 2712 } else { 2713 // If this is a definition of a forward referenced function, make sure the 2714 // types agree. 2715 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator I 2716 = ForwardRefValIDs.find(NumberedVals.size()); 2717 if (I != ForwardRefValIDs.end()) { 2718 Fn = cast<Function>(I->second.first); 2719 if (Fn->getType() != PFT) 2720 return Error(NameLoc, "type of definition and forward reference of '@" + 2721 utostr(NumberedVals.size()) +"' disagree"); 2722 ForwardRefValIDs.erase(I); 2723 } 2724 } 2725 2726 if (Fn == 0) 2727 Fn = Function::Create(FT, GlobalValue::ExternalLinkage, FunctionName, M); 2728 else // Move the forward-reference to the correct spot in the module. 2729 M->getFunctionList().splice(M->end(), M->getFunctionList(), Fn); 2730 2731 if (FunctionName.empty()) 2732 NumberedVals.push_back(Fn); 2733 2734 Fn->setLinkage((GlobalValue::LinkageTypes)Linkage); 2735 Fn->setVisibility((GlobalValue::VisibilityTypes)Visibility); 2736 Fn->setCallingConv(CC); 2737 Fn->setAttributes(PAL); 2738 Fn->setAlignment(Alignment); 2739 Fn->setSection(Section); 2740 if (!GC.empty()) Fn->setGC(GC.c_str()); 2741 2742 // Add all of the arguments we parsed to the function. 2743 Function::arg_iterator ArgIt = Fn->arg_begin(); 2744 for (unsigned i = 0, e = ArgList.size(); i != e; ++i, ++ArgIt) { 2745 // If we run out of arguments in the Function prototype, exit early. 2746 // FIXME: REMOVE THIS IN LLVM 3.0, this is just for the mismatch case above. 2747 if (ArgIt == Fn->arg_end()) break; 2748 2749 // If the argument has a name, insert it into the argument symbol table. 2750 if (ArgList[i].Name.empty()) continue; 2751 2752 // Set the name, if it conflicted, it will be auto-renamed. 2753 ArgIt->setName(ArgList[i].Name); 2754 2755 if (ArgIt->getNameStr() != ArgList[i].Name) 2756 return Error(ArgList[i].Loc, "redefinition of argument '%" + 2757 ArgList[i].Name + "'"); 2758 } 2759 2760 return false; 2761} 2762 2763 2764/// ParseFunctionBody 2765/// ::= '{' BasicBlock+ '}' 2766/// ::= 'begin' BasicBlock+ 'end' // FIXME: remove in LLVM 3.0 2767/// 2768bool LLParser::ParseFunctionBody(Function &Fn) { 2769 if (Lex.getKind() != lltok::lbrace && Lex.getKind() != lltok::kw_begin) 2770 return TokError("expected '{' in function body"); 2771 Lex.Lex(); // eat the {. 2772 2773 int FunctionNumber = -1; 2774 if (!Fn.hasName()) FunctionNumber = NumberedVals.size()-1; 2775 2776 PerFunctionState PFS(*this, Fn, FunctionNumber); 2777 2778 while (Lex.getKind() != lltok::rbrace && Lex.getKind() != lltok::kw_end) 2779 if (ParseBasicBlock(PFS)) return true; 2780 2781 // Eat the }. 2782 Lex.Lex(); 2783 2784 // Verify function is ok. 2785 return PFS.FinishFunction(); 2786} 2787 2788/// ParseBasicBlock 2789/// ::= LabelStr? Instruction* 2790bool LLParser::ParseBasicBlock(PerFunctionState &PFS) { 2791 // If this basic block starts out with a name, remember it. 2792 std::string Name; 2793 LocTy NameLoc = Lex.getLoc(); 2794 if (Lex.getKind() == lltok::LabelStr) { 2795 Name = Lex.getStrVal(); 2796 Lex.Lex(); 2797 } 2798 2799 BasicBlock *BB = PFS.DefineBB(Name, NameLoc); 2800 if (BB == 0) return true; 2801 2802 std::string NameStr; 2803 2804 // Parse the instructions in this block until we get a terminator. 2805 Instruction *Inst; 2806 do { 2807 // This instruction may have three possibilities for a name: a) none 2808 // specified, b) name specified "%foo =", c) number specified: "%4 =". 2809 LocTy NameLoc = Lex.getLoc(); 2810 int NameID = -1; 2811 NameStr = ""; 2812 2813 if (Lex.getKind() == lltok::LocalVarID) { 2814 NameID = Lex.getUIntVal(); 2815 Lex.Lex(); 2816 if (ParseToken(lltok::equal, "expected '=' after instruction id")) 2817 return true; 2818 } else if (Lex.getKind() == lltok::LocalVar || 2819 // FIXME: REMOVE IN LLVM 3.0 2820 Lex.getKind() == lltok::StringConstant) { 2821 NameStr = Lex.getStrVal(); 2822 Lex.Lex(); 2823 if (ParseToken(lltok::equal, "expected '=' after instruction name")) 2824 return true; 2825 } 2826 2827 if (ParseInstruction(Inst, BB, PFS)) return true; 2828 if (EatIfPresent(lltok::comma)) 2829 ParseOptionalCustomMetadata(); 2830 2831 // Set metadata attached with this instruction. 2832 MetadataContext &TheMetadata = M->getContext().getMetadata(); 2833 for (SmallVector<std::pair<unsigned, MDNode *>, 2>::iterator 2834 MDI = MDsOnInst.begin(), MDE = MDsOnInst.end(); MDI != MDE; ++MDI) 2835 TheMetadata.addMD(MDI->first, MDI->second, Inst); 2836 MDsOnInst.clear(); 2837 2838 BB->getInstList().push_back(Inst); 2839 2840 // Set the name on the instruction. 2841 if (PFS.SetInstName(NameID, NameStr, NameLoc, Inst)) return true; 2842 } while (!isa<TerminatorInst>(Inst)); 2843 2844 return false; 2845} 2846 2847//===----------------------------------------------------------------------===// 2848// Instruction Parsing. 2849//===----------------------------------------------------------------------===// 2850 2851/// ParseInstruction - Parse one of the many different instructions. 2852/// 2853bool LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB, 2854 PerFunctionState &PFS) { 2855 lltok::Kind Token = Lex.getKind(); 2856 if (Token == lltok::Eof) 2857 return TokError("found end of file when expecting more instructions"); 2858 LocTy Loc = Lex.getLoc(); 2859 unsigned KeywordVal = Lex.getUIntVal(); 2860 Lex.Lex(); // Eat the keyword. 2861 2862 switch (Token) { 2863 default: return Error(Loc, "expected instruction opcode"); 2864 // Terminator Instructions. 2865 case lltok::kw_unwind: Inst = new UnwindInst(Context); return false; 2866 case lltok::kw_unreachable: Inst = new UnreachableInst(Context); return false; 2867 case lltok::kw_ret: return ParseRet(Inst, BB, PFS); 2868 case lltok::kw_br: return ParseBr(Inst, PFS); 2869 case lltok::kw_switch: return ParseSwitch(Inst, PFS); 2870 case lltok::kw_indirectbr: return ParseIndirectBr(Inst, PFS); 2871 case lltok::kw_invoke: return ParseInvoke(Inst, PFS); 2872 // Binary Operators. 2873 case lltok::kw_add: 2874 case lltok::kw_sub: 2875 case lltok::kw_mul: { 2876 bool NUW = false; 2877 bool NSW = false; 2878 LocTy ModifierLoc = Lex.getLoc(); 2879 if (EatIfPresent(lltok::kw_nuw)) 2880 NUW = true; 2881 if (EatIfPresent(lltok::kw_nsw)) { 2882 NSW = true; 2883 if (EatIfPresent(lltok::kw_nuw)) 2884 NUW = true; 2885 } 2886 // API compatibility: Accept either integer or floating-point types. 2887 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 0); 2888 if (!Result) { 2889 if (!Inst->getType()->isIntOrIntVector()) { 2890 if (NUW) 2891 return Error(ModifierLoc, "nuw only applies to integer operations"); 2892 if (NSW) 2893 return Error(ModifierLoc, "nsw only applies to integer operations"); 2894 } 2895 if (NUW) 2896 cast<BinaryOperator>(Inst)->setHasNoUnsignedWrap(true); 2897 if (NSW) 2898 cast<BinaryOperator>(Inst)->setHasNoSignedWrap(true); 2899 } 2900 return Result; 2901 } 2902 case lltok::kw_fadd: 2903 case lltok::kw_fsub: 2904 case lltok::kw_fmul: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2905 2906 case lltok::kw_sdiv: { 2907 bool Exact = false; 2908 if (EatIfPresent(lltok::kw_exact)) 2909 Exact = true; 2910 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 1); 2911 if (!Result) 2912 if (Exact) 2913 cast<BinaryOperator>(Inst)->setIsExact(true); 2914 return Result; 2915 } 2916 2917 case lltok::kw_udiv: 2918 case lltok::kw_urem: 2919 case lltok::kw_srem: return ParseArithmetic(Inst, PFS, KeywordVal, 1); 2920 case lltok::kw_fdiv: 2921 case lltok::kw_frem: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2922 case lltok::kw_shl: 2923 case lltok::kw_lshr: 2924 case lltok::kw_ashr: 2925 case lltok::kw_and: 2926 case lltok::kw_or: 2927 case lltok::kw_xor: return ParseLogical(Inst, PFS, KeywordVal); 2928 case lltok::kw_icmp: 2929 case lltok::kw_fcmp: return ParseCompare(Inst, PFS, KeywordVal); 2930 // Casts. 2931 case lltok::kw_trunc: 2932 case lltok::kw_zext: 2933 case lltok::kw_sext: 2934 case lltok::kw_fptrunc: 2935 case lltok::kw_fpext: 2936 case lltok::kw_bitcast: 2937 case lltok::kw_uitofp: 2938 case lltok::kw_sitofp: 2939 case lltok::kw_fptoui: 2940 case lltok::kw_fptosi: 2941 case lltok::kw_inttoptr: 2942 case lltok::kw_ptrtoint: return ParseCast(Inst, PFS, KeywordVal); 2943 // Other. 2944 case lltok::kw_select: return ParseSelect(Inst, PFS); 2945 case lltok::kw_va_arg: return ParseVA_Arg(Inst, PFS); 2946 case lltok::kw_extractelement: return ParseExtractElement(Inst, PFS); 2947 case lltok::kw_insertelement: return ParseInsertElement(Inst, PFS); 2948 case lltok::kw_shufflevector: return ParseShuffleVector(Inst, PFS); 2949 case lltok::kw_phi: return ParsePHI(Inst, PFS); 2950 case lltok::kw_call: return ParseCall(Inst, PFS, false); 2951 case lltok::kw_tail: return ParseCall(Inst, PFS, true); 2952 // Memory. 2953 case lltok::kw_alloca: return ParseAlloc(Inst, PFS); 2954 case lltok::kw_malloc: return ParseAlloc(Inst, PFS, BB, false); 2955 case lltok::kw_free: return ParseFree(Inst, PFS, BB); 2956 case lltok::kw_load: return ParseLoad(Inst, PFS, false); 2957 case lltok::kw_store: return ParseStore(Inst, PFS, false); 2958 case lltok::kw_volatile: 2959 if (EatIfPresent(lltok::kw_load)) 2960 return ParseLoad(Inst, PFS, true); 2961 else if (EatIfPresent(lltok::kw_store)) 2962 return ParseStore(Inst, PFS, true); 2963 else 2964 return TokError("expected 'load' or 'store'"); 2965 case lltok::kw_getresult: return ParseGetResult(Inst, PFS); 2966 case lltok::kw_getelementptr: return ParseGetElementPtr(Inst, PFS); 2967 case lltok::kw_extractvalue: return ParseExtractValue(Inst, PFS); 2968 case lltok::kw_insertvalue: return ParseInsertValue(Inst, PFS); 2969 } 2970} 2971 2972/// ParseCmpPredicate - Parse an integer or fp predicate, based on Kind. 2973bool LLParser::ParseCmpPredicate(unsigned &P, unsigned Opc) { 2974 if (Opc == Instruction::FCmp) { 2975 switch (Lex.getKind()) { 2976 default: TokError("expected fcmp predicate (e.g. 'oeq')"); 2977 case lltok::kw_oeq: P = CmpInst::FCMP_OEQ; break; 2978 case lltok::kw_one: P = CmpInst::FCMP_ONE; break; 2979 case lltok::kw_olt: P = CmpInst::FCMP_OLT; break; 2980 case lltok::kw_ogt: P = CmpInst::FCMP_OGT; break; 2981 case lltok::kw_ole: P = CmpInst::FCMP_OLE; break; 2982 case lltok::kw_oge: P = CmpInst::FCMP_OGE; break; 2983 case lltok::kw_ord: P = CmpInst::FCMP_ORD; break; 2984 case lltok::kw_uno: P = CmpInst::FCMP_UNO; break; 2985 case lltok::kw_ueq: P = CmpInst::FCMP_UEQ; break; 2986 case lltok::kw_une: P = CmpInst::FCMP_UNE; break; 2987 case lltok::kw_ult: P = CmpInst::FCMP_ULT; break; 2988 case lltok::kw_ugt: P = CmpInst::FCMP_UGT; break; 2989 case lltok::kw_ule: P = CmpInst::FCMP_ULE; break; 2990 case lltok::kw_uge: P = CmpInst::FCMP_UGE; break; 2991 case lltok::kw_true: P = CmpInst::FCMP_TRUE; break; 2992 case lltok::kw_false: P = CmpInst::FCMP_FALSE; break; 2993 } 2994 } else { 2995 switch (Lex.getKind()) { 2996 default: TokError("expected icmp predicate (e.g. 'eq')"); 2997 case lltok::kw_eq: P = CmpInst::ICMP_EQ; break; 2998 case lltok::kw_ne: P = CmpInst::ICMP_NE; break; 2999 case lltok::kw_slt: P = CmpInst::ICMP_SLT; break; 3000 case lltok::kw_sgt: P = CmpInst::ICMP_SGT; break; 3001 case lltok::kw_sle: P = CmpInst::ICMP_SLE; break; 3002 case lltok::kw_sge: P = CmpInst::ICMP_SGE; break; 3003 case lltok::kw_ult: P = CmpInst::ICMP_ULT; break; 3004 case lltok::kw_ugt: P = CmpInst::ICMP_UGT; break; 3005 case lltok::kw_ule: P = CmpInst::ICMP_ULE; break; 3006 case lltok::kw_uge: P = CmpInst::ICMP_UGE; break; 3007 } 3008 } 3009 Lex.Lex(); 3010 return false; 3011} 3012 3013//===----------------------------------------------------------------------===// 3014// Terminator Instructions. 3015//===----------------------------------------------------------------------===// 3016 3017/// ParseRet - Parse a return instruction. 3018/// ::= 'ret' void (',' !dbg, !1) 3019/// ::= 'ret' TypeAndValue (',' !dbg, !1) 3020/// ::= 'ret' TypeAndValue (',' TypeAndValue)+ (',' !dbg, !1) 3021/// [[obsolete: LLVM 3.0]] 3022bool LLParser::ParseRet(Instruction *&Inst, BasicBlock *BB, 3023 PerFunctionState &PFS) { 3024 PATypeHolder Ty(Type::getVoidTy(Context)); 3025 if (ParseType(Ty, true /*void allowed*/)) return true; 3026 3027 if (Ty->isVoidTy()) { 3028 Inst = ReturnInst::Create(Context); 3029 return false; 3030 } 3031 3032 Value *RV; 3033 if (ParseValue(Ty, RV, PFS)) return true; 3034 3035 if (EatIfPresent(lltok::comma)) { 3036 // Parse optional custom metadata, e.g. !dbg 3037 if (Lex.getKind() == lltok::NamedOrCustomMD) { 3038 if (ParseOptionalCustomMetadata()) return true; 3039 } else { 3040 // The normal case is one return value. 3041 // FIXME: LLVM 3.0 remove MRV support for 'ret i32 1, i32 2', requiring use 3042 // of 'ret {i32,i32} {i32 1, i32 2}' 3043 SmallVector<Value*, 8> RVs; 3044 RVs.push_back(RV); 3045 3046 do { 3047 // If optional custom metadata, e.g. !dbg is seen then this is the 3048 // end of MRV. 3049 if (Lex.getKind() == lltok::NamedOrCustomMD) 3050 break; 3051 if (ParseTypeAndValue(RV, PFS)) return true; 3052 RVs.push_back(RV); 3053 } while (EatIfPresent(lltok::comma)); 3054 3055 RV = UndefValue::get(PFS.getFunction().getReturnType()); 3056 for (unsigned i = 0, e = RVs.size(); i != e; ++i) { 3057 Instruction *I = InsertValueInst::Create(RV, RVs[i], i, "mrv"); 3058 BB->getInstList().push_back(I); 3059 RV = I; 3060 } 3061 } 3062 } 3063 3064 Inst = ReturnInst::Create(Context, RV); 3065 return false; 3066} 3067 3068 3069/// ParseBr 3070/// ::= 'br' TypeAndValue 3071/// ::= 'br' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3072bool LLParser::ParseBr(Instruction *&Inst, PerFunctionState &PFS) { 3073 LocTy Loc, Loc2; 3074 Value *Op0; 3075 BasicBlock *Op1, *Op2; 3076 if (ParseTypeAndValue(Op0, Loc, PFS)) return true; 3077 3078 if (BasicBlock *BB = dyn_cast<BasicBlock>(Op0)) { 3079 Inst = BranchInst::Create(BB); 3080 return false; 3081 } 3082 3083 if (Op0->getType() != Type::getInt1Ty(Context)) 3084 return Error(Loc, "branch condition must have 'i1' type"); 3085 3086 if (ParseToken(lltok::comma, "expected ',' after branch condition") || 3087 ParseTypeAndBasicBlock(Op1, Loc, PFS) || 3088 ParseToken(lltok::comma, "expected ',' after true destination") || 3089 ParseTypeAndBasicBlock(Op2, Loc2, PFS)) 3090 return true; 3091 3092 Inst = BranchInst::Create(Op1, Op2, Op0); 3093 return false; 3094} 3095 3096/// ParseSwitch 3097/// Instruction 3098/// ::= 'switch' TypeAndValue ',' TypeAndValue '[' JumpTable ']' 3099/// JumpTable 3100/// ::= (TypeAndValue ',' TypeAndValue)* 3101bool LLParser::ParseSwitch(Instruction *&Inst, PerFunctionState &PFS) { 3102 LocTy CondLoc, BBLoc; 3103 Value *Cond; 3104 BasicBlock *DefaultBB; 3105 if (ParseTypeAndValue(Cond, CondLoc, PFS) || 3106 ParseToken(lltok::comma, "expected ',' after switch condition") || 3107 ParseTypeAndBasicBlock(DefaultBB, BBLoc, PFS) || 3108 ParseToken(lltok::lsquare, "expected '[' with switch table")) 3109 return true; 3110 3111 if (!isa<IntegerType>(Cond->getType())) 3112 return Error(CondLoc, "switch condition must have integer type"); 3113 3114 // Parse the jump table pairs. 3115 SmallPtrSet<Value*, 32> SeenCases; 3116 SmallVector<std::pair<ConstantInt*, BasicBlock*>, 32> Table; 3117 while (Lex.getKind() != lltok::rsquare) { 3118 Value *Constant; 3119 BasicBlock *DestBB; 3120 3121 if (ParseTypeAndValue(Constant, CondLoc, PFS) || 3122 ParseToken(lltok::comma, "expected ',' after case value") || 3123 ParseTypeAndBasicBlock(DestBB, PFS)) 3124 return true; 3125 3126 if (!SeenCases.insert(Constant)) 3127 return Error(CondLoc, "duplicate case value in switch"); 3128 if (!isa<ConstantInt>(Constant)) 3129 return Error(CondLoc, "case value is not a constant integer"); 3130 3131 Table.push_back(std::make_pair(cast<ConstantInt>(Constant), DestBB)); 3132 } 3133 3134 Lex.Lex(); // Eat the ']'. 3135 3136 SwitchInst *SI = SwitchInst::Create(Cond, DefaultBB, Table.size()); 3137 for (unsigned i = 0, e = Table.size(); i != e; ++i) 3138 SI->addCase(Table[i].first, Table[i].second); 3139 Inst = SI; 3140 return false; 3141} 3142 3143/// ParseIndirectBr 3144/// Instruction 3145/// ::= 'indirectbr' TypeAndValue ',' '[' LabelList ']' 3146bool LLParser::ParseIndirectBr(Instruction *&Inst, PerFunctionState &PFS) { 3147 LocTy AddrLoc; 3148 Value *Address; 3149 if (ParseTypeAndValue(Address, AddrLoc, PFS) || 3150 ParseToken(lltok::comma, "expected ',' after indirectbr address") || 3151 ParseToken(lltok::lsquare, "expected '[' with indirectbr")) 3152 return true; 3153 3154 if (!isa<PointerType>(Address->getType())) 3155 return Error(AddrLoc, "indirectbr address must have pointer type"); 3156 3157 // Parse the destination list. 3158 SmallVector<BasicBlock*, 16> DestList; 3159 3160 if (Lex.getKind() != lltok::rsquare) { 3161 BasicBlock *DestBB; 3162 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3163 return true; 3164 DestList.push_back(DestBB); 3165 3166 while (EatIfPresent(lltok::comma)) { 3167 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3168 return true; 3169 DestList.push_back(DestBB); 3170 } 3171 } 3172 3173 if (ParseToken(lltok::rsquare, "expected ']' at end of block list")) 3174 return true; 3175 3176 IndirectBrInst *IBI = IndirectBrInst::Create(Address, DestList.size()); 3177 for (unsigned i = 0, e = DestList.size(); i != e; ++i) 3178 IBI->addDestination(DestList[i]); 3179 Inst = IBI; 3180 return false; 3181} 3182 3183 3184/// ParseInvoke 3185/// ::= 'invoke' OptionalCallingConv OptionalAttrs Type Value ParamList 3186/// OptionalAttrs 'to' TypeAndValue 'unwind' TypeAndValue 3187bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) { 3188 LocTy CallLoc = Lex.getLoc(); 3189 unsigned RetAttrs, FnAttrs; 3190 CallingConv::ID CC; 3191 PATypeHolder RetType(Type::getVoidTy(Context)); 3192 LocTy RetTypeLoc; 3193 ValID CalleeID; 3194 SmallVector<ParamInfo, 16> ArgList; 3195 3196 BasicBlock *NormalBB, *UnwindBB; 3197 if (ParseOptionalCallingConv(CC) || 3198 ParseOptionalAttrs(RetAttrs, 1) || 3199 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3200 ParseValID(CalleeID) || 3201 ParseParameterList(ArgList, PFS) || 3202 ParseOptionalAttrs(FnAttrs, 2) || 3203 ParseToken(lltok::kw_to, "expected 'to' in invoke") || 3204 ParseTypeAndBasicBlock(NormalBB, PFS) || 3205 ParseToken(lltok::kw_unwind, "expected 'unwind' in invoke") || 3206 ParseTypeAndBasicBlock(UnwindBB, PFS)) 3207 return true; 3208 3209 // If RetType is a non-function pointer type, then this is the short syntax 3210 // for the call, which means that RetType is just the return type. Infer the 3211 // rest of the function argument types from the arguments that are present. 3212 const PointerType *PFTy = 0; 3213 const FunctionType *Ty = 0; 3214 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3215 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3216 // Pull out the types of all of the arguments... 3217 std::vector<const Type*> ParamTypes; 3218 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3219 ParamTypes.push_back(ArgList[i].V->getType()); 3220 3221 if (!FunctionType::isValidReturnType(RetType)) 3222 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3223 3224 Ty = FunctionType::get(RetType, ParamTypes, false); 3225 PFTy = PointerType::getUnqual(Ty); 3226 } 3227 3228 // Look up the callee. 3229 Value *Callee; 3230 if (ConvertValIDToValue(PFTy, CalleeID, Callee, PFS)) return true; 3231 3232 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 3233 // function attributes. 3234 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 3235 if (FnAttrs & ObsoleteFuncAttrs) { 3236 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 3237 FnAttrs &= ~ObsoleteFuncAttrs; 3238 } 3239 3240 // Set up the Attributes for the function. 3241 SmallVector<AttributeWithIndex, 8> Attrs; 3242 if (RetAttrs != Attribute::None) 3243 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3244 3245 SmallVector<Value*, 8> Args; 3246 3247 // Loop through FunctionType's arguments and ensure they are specified 3248 // correctly. Also, gather any parameter attributes. 3249 FunctionType::param_iterator I = Ty->param_begin(); 3250 FunctionType::param_iterator E = Ty->param_end(); 3251 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3252 const Type *ExpectedTy = 0; 3253 if (I != E) { 3254 ExpectedTy = *I++; 3255 } else if (!Ty->isVarArg()) { 3256 return Error(ArgList[i].Loc, "too many arguments specified"); 3257 } 3258 3259 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3260 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3261 ExpectedTy->getDescription() + "'"); 3262 Args.push_back(ArgList[i].V); 3263 if (ArgList[i].Attrs != Attribute::None) 3264 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3265 } 3266 3267 if (I != E) 3268 return Error(CallLoc, "not enough parameters specified for call"); 3269 3270 if (FnAttrs != Attribute::None) 3271 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3272 3273 // Finish off the Attributes and check them 3274 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3275 3276 InvokeInst *II = InvokeInst::Create(Callee, NormalBB, UnwindBB, 3277 Args.begin(), Args.end()); 3278 II->setCallingConv(CC); 3279 II->setAttributes(PAL); 3280 Inst = II; 3281 return false; 3282} 3283 3284 3285 3286//===----------------------------------------------------------------------===// 3287// Binary Operators. 3288//===----------------------------------------------------------------------===// 3289 3290/// ParseArithmetic 3291/// ::= ArithmeticOps TypeAndValue ',' Value 3292/// 3293/// If OperandType is 0, then any FP or integer operand is allowed. If it is 1, 3294/// then any integer operand is allowed, if it is 2, any fp operand is allowed. 3295bool LLParser::ParseArithmetic(Instruction *&Inst, PerFunctionState &PFS, 3296 unsigned Opc, unsigned OperandType) { 3297 LocTy Loc; Value *LHS, *RHS; 3298 if (ParseTypeAndValue(LHS, Loc, PFS) || 3299 ParseToken(lltok::comma, "expected ',' in arithmetic operation") || 3300 ParseValue(LHS->getType(), RHS, PFS)) 3301 return true; 3302 3303 bool Valid; 3304 switch (OperandType) { 3305 default: llvm_unreachable("Unknown operand type!"); 3306 case 0: // int or FP. 3307 Valid = LHS->getType()->isIntOrIntVector() || 3308 LHS->getType()->isFPOrFPVector(); 3309 break; 3310 case 1: Valid = LHS->getType()->isIntOrIntVector(); break; 3311 case 2: Valid = LHS->getType()->isFPOrFPVector(); break; 3312 } 3313 3314 if (!Valid) 3315 return Error(Loc, "invalid operand type for instruction"); 3316 3317 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3318 return false; 3319} 3320 3321/// ParseLogical 3322/// ::= ArithmeticOps TypeAndValue ',' Value { 3323bool LLParser::ParseLogical(Instruction *&Inst, PerFunctionState &PFS, 3324 unsigned Opc) { 3325 LocTy Loc; Value *LHS, *RHS; 3326 if (ParseTypeAndValue(LHS, Loc, PFS) || 3327 ParseToken(lltok::comma, "expected ',' in logical operation") || 3328 ParseValue(LHS->getType(), RHS, PFS)) 3329 return true; 3330 3331 if (!LHS->getType()->isIntOrIntVector()) 3332 return Error(Loc,"instruction requires integer or integer vector operands"); 3333 3334 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3335 return false; 3336} 3337 3338 3339/// ParseCompare 3340/// ::= 'icmp' IPredicates TypeAndValue ',' Value 3341/// ::= 'fcmp' FPredicates TypeAndValue ',' Value 3342bool LLParser::ParseCompare(Instruction *&Inst, PerFunctionState &PFS, 3343 unsigned Opc) { 3344 // Parse the integer/fp comparison predicate. 3345 LocTy Loc; 3346 unsigned Pred; 3347 Value *LHS, *RHS; 3348 if (ParseCmpPredicate(Pred, Opc) || 3349 ParseTypeAndValue(LHS, Loc, PFS) || 3350 ParseToken(lltok::comma, "expected ',' after compare value") || 3351 ParseValue(LHS->getType(), RHS, PFS)) 3352 return true; 3353 3354 if (Opc == Instruction::FCmp) { 3355 if (!LHS->getType()->isFPOrFPVector()) 3356 return Error(Loc, "fcmp requires floating point operands"); 3357 Inst = new FCmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3358 } else { 3359 assert(Opc == Instruction::ICmp && "Unknown opcode for CmpInst!"); 3360 if (!LHS->getType()->isIntOrIntVector() && 3361 !isa<PointerType>(LHS->getType())) 3362 return Error(Loc, "icmp requires integer operands"); 3363 Inst = new ICmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3364 } 3365 return false; 3366} 3367 3368//===----------------------------------------------------------------------===// 3369// Other Instructions. 3370//===----------------------------------------------------------------------===// 3371 3372 3373/// ParseCast 3374/// ::= CastOpc TypeAndValue 'to' Type 3375bool LLParser::ParseCast(Instruction *&Inst, PerFunctionState &PFS, 3376 unsigned Opc) { 3377 LocTy Loc; Value *Op; 3378 PATypeHolder DestTy(Type::getVoidTy(Context)); 3379 if (ParseTypeAndValue(Op, Loc, PFS) || 3380 ParseToken(lltok::kw_to, "expected 'to' after cast value") || 3381 ParseType(DestTy)) 3382 return true; 3383 3384 if (!CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy)) { 3385 CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy); 3386 return Error(Loc, "invalid cast opcode for cast from '" + 3387 Op->getType()->getDescription() + "' to '" + 3388 DestTy->getDescription() + "'"); 3389 } 3390 Inst = CastInst::Create((Instruction::CastOps)Opc, Op, DestTy); 3391 return false; 3392} 3393 3394/// ParseSelect 3395/// ::= 'select' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3396bool LLParser::ParseSelect(Instruction *&Inst, PerFunctionState &PFS) { 3397 LocTy Loc; 3398 Value *Op0, *Op1, *Op2; 3399 if (ParseTypeAndValue(Op0, Loc, PFS) || 3400 ParseToken(lltok::comma, "expected ',' after select condition") || 3401 ParseTypeAndValue(Op1, PFS) || 3402 ParseToken(lltok::comma, "expected ',' after select value") || 3403 ParseTypeAndValue(Op2, PFS)) 3404 return true; 3405 3406 if (const char *Reason = SelectInst::areInvalidOperands(Op0, Op1, Op2)) 3407 return Error(Loc, Reason); 3408 3409 Inst = SelectInst::Create(Op0, Op1, Op2); 3410 return false; 3411} 3412 3413/// ParseVA_Arg 3414/// ::= 'va_arg' TypeAndValue ',' Type 3415bool LLParser::ParseVA_Arg(Instruction *&Inst, PerFunctionState &PFS) { 3416 Value *Op; 3417 PATypeHolder EltTy(Type::getVoidTy(Context)); 3418 LocTy TypeLoc; 3419 if (ParseTypeAndValue(Op, PFS) || 3420 ParseToken(lltok::comma, "expected ',' after vaarg operand") || 3421 ParseType(EltTy, TypeLoc)) 3422 return true; 3423 3424 if (!EltTy->isFirstClassType()) 3425 return Error(TypeLoc, "va_arg requires operand with first class type"); 3426 3427 Inst = new VAArgInst(Op, EltTy); 3428 return false; 3429} 3430 3431/// ParseExtractElement 3432/// ::= 'extractelement' TypeAndValue ',' TypeAndValue 3433bool LLParser::ParseExtractElement(Instruction *&Inst, PerFunctionState &PFS) { 3434 LocTy Loc; 3435 Value *Op0, *Op1; 3436 if (ParseTypeAndValue(Op0, Loc, PFS) || 3437 ParseToken(lltok::comma, "expected ',' after extract value") || 3438 ParseTypeAndValue(Op1, PFS)) 3439 return true; 3440 3441 if (!ExtractElementInst::isValidOperands(Op0, Op1)) 3442 return Error(Loc, "invalid extractelement operands"); 3443 3444 Inst = ExtractElementInst::Create(Op0, Op1); 3445 return false; 3446} 3447 3448/// ParseInsertElement 3449/// ::= 'insertelement' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3450bool LLParser::ParseInsertElement(Instruction *&Inst, PerFunctionState &PFS) { 3451 LocTy Loc; 3452 Value *Op0, *Op1, *Op2; 3453 if (ParseTypeAndValue(Op0, Loc, PFS) || 3454 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3455 ParseTypeAndValue(Op1, PFS) || 3456 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3457 ParseTypeAndValue(Op2, PFS)) 3458 return true; 3459 3460 if (!InsertElementInst::isValidOperands(Op0, Op1, Op2)) 3461 return Error(Loc, "invalid insertelement operands"); 3462 3463 Inst = InsertElementInst::Create(Op0, Op1, Op2); 3464 return false; 3465} 3466 3467/// ParseShuffleVector 3468/// ::= 'shufflevector' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3469bool LLParser::ParseShuffleVector(Instruction *&Inst, PerFunctionState &PFS) { 3470 LocTy Loc; 3471 Value *Op0, *Op1, *Op2; 3472 if (ParseTypeAndValue(Op0, Loc, PFS) || 3473 ParseToken(lltok::comma, "expected ',' after shuffle mask") || 3474 ParseTypeAndValue(Op1, PFS) || 3475 ParseToken(lltok::comma, "expected ',' after shuffle value") || 3476 ParseTypeAndValue(Op2, PFS)) 3477 return true; 3478 3479 if (!ShuffleVectorInst::isValidOperands(Op0, Op1, Op2)) 3480 return Error(Loc, "invalid extractelement operands"); 3481 3482 Inst = new ShuffleVectorInst(Op0, Op1, Op2); 3483 return false; 3484} 3485 3486/// ParsePHI 3487/// ::= 'phi' Type '[' Value ',' Value ']' (',' '[' Value ',' Value ']')* 3488bool LLParser::ParsePHI(Instruction *&Inst, PerFunctionState &PFS) { 3489 PATypeHolder Ty(Type::getVoidTy(Context)); 3490 Value *Op0, *Op1; 3491 LocTy TypeLoc = Lex.getLoc(); 3492 3493 if (ParseType(Ty) || 3494 ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3495 ParseValue(Ty, Op0, PFS) || 3496 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3497 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3498 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3499 return true; 3500 3501 SmallVector<std::pair<Value*, BasicBlock*>, 16> PHIVals; 3502 while (1) { 3503 PHIVals.push_back(std::make_pair(Op0, cast<BasicBlock>(Op1))); 3504 3505 if (!EatIfPresent(lltok::comma)) 3506 break; 3507 3508 if (Lex.getKind() == lltok::NamedOrCustomMD) 3509 break; 3510 3511 if (ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3512 ParseValue(Ty, Op0, PFS) || 3513 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3514 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3515 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3516 return true; 3517 } 3518 3519 if (Lex.getKind() == lltok::NamedOrCustomMD) 3520 if (ParseOptionalCustomMetadata()) return true; 3521 3522 if (!Ty->isFirstClassType()) 3523 return Error(TypeLoc, "phi node must have first class type"); 3524 3525 PHINode *PN = PHINode::Create(Ty); 3526 PN->reserveOperandSpace(PHIVals.size()); 3527 for (unsigned i = 0, e = PHIVals.size(); i != e; ++i) 3528 PN->addIncoming(PHIVals[i].first, PHIVals[i].second); 3529 Inst = PN; 3530 return false; 3531} 3532 3533/// ParseCall 3534/// ::= 'tail'? 'call' OptionalCallingConv OptionalAttrs Type Value 3535/// ParameterList OptionalAttrs 3536bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS, 3537 bool isTail) { 3538 unsigned RetAttrs, FnAttrs; 3539 CallingConv::ID CC; 3540 PATypeHolder RetType(Type::getVoidTy(Context)); 3541 LocTy RetTypeLoc; 3542 ValID CalleeID; 3543 SmallVector<ParamInfo, 16> ArgList; 3544 LocTy CallLoc = Lex.getLoc(); 3545 3546 if ((isTail && ParseToken(lltok::kw_call, "expected 'tail call'")) || 3547 ParseOptionalCallingConv(CC) || 3548 ParseOptionalAttrs(RetAttrs, 1) || 3549 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3550 ParseValID(CalleeID) || 3551 ParseParameterList(ArgList, PFS) || 3552 ParseOptionalAttrs(FnAttrs, 2)) 3553 return true; 3554 3555 // If RetType is a non-function pointer type, then this is the short syntax 3556 // for the call, which means that RetType is just the return type. Infer the 3557 // rest of the function argument types from the arguments that are present. 3558 const PointerType *PFTy = 0; 3559 const FunctionType *Ty = 0; 3560 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3561 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3562 // Pull out the types of all of the arguments... 3563 std::vector<const Type*> ParamTypes; 3564 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3565 ParamTypes.push_back(ArgList[i].V->getType()); 3566 3567 if (!FunctionType::isValidReturnType(RetType)) 3568 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3569 3570 Ty = FunctionType::get(RetType, ParamTypes, false); 3571 PFTy = PointerType::getUnqual(Ty); 3572 } 3573 3574 // Look up the callee. 3575 Value *Callee; 3576 if (ConvertValIDToValue(PFTy, CalleeID, Callee, PFS)) return true; 3577 3578 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 3579 // function attributes. 3580 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 3581 if (FnAttrs & ObsoleteFuncAttrs) { 3582 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 3583 FnAttrs &= ~ObsoleteFuncAttrs; 3584 } 3585 3586 // Set up the Attributes for the function. 3587 SmallVector<AttributeWithIndex, 8> Attrs; 3588 if (RetAttrs != Attribute::None) 3589 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3590 3591 SmallVector<Value*, 8> Args; 3592 3593 // Loop through FunctionType's arguments and ensure they are specified 3594 // correctly. Also, gather any parameter attributes. 3595 FunctionType::param_iterator I = Ty->param_begin(); 3596 FunctionType::param_iterator E = Ty->param_end(); 3597 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3598 const Type *ExpectedTy = 0; 3599 if (I != E) { 3600 ExpectedTy = *I++; 3601 } else if (!Ty->isVarArg()) { 3602 return Error(ArgList[i].Loc, "too many arguments specified"); 3603 } 3604 3605 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3606 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3607 ExpectedTy->getDescription() + "'"); 3608 Args.push_back(ArgList[i].V); 3609 if (ArgList[i].Attrs != Attribute::None) 3610 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3611 } 3612 3613 if (I != E) 3614 return Error(CallLoc, "not enough parameters specified for call"); 3615 3616 if (FnAttrs != Attribute::None) 3617 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3618 3619 // Finish off the Attributes and check them 3620 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3621 3622 CallInst *CI = CallInst::Create(Callee, Args.begin(), Args.end()); 3623 CI->setTailCall(isTail); 3624 CI->setCallingConv(CC); 3625 CI->setAttributes(PAL); 3626 Inst = CI; 3627 return false; 3628} 3629 3630//===----------------------------------------------------------------------===// 3631// Memory Instructions. 3632//===----------------------------------------------------------------------===// 3633 3634/// ParseAlloc 3635/// ::= 'malloc' Type (',' TypeAndValue)? (',' OptionalInfo)? 3636/// ::= 'alloca' Type (',' TypeAndValue)? (',' OptionalInfo)? 3637bool LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS, 3638 BasicBlock* BB, bool isAlloca) { 3639 PATypeHolder Ty(Type::getVoidTy(Context)); 3640 Value *Size = 0; 3641 LocTy SizeLoc; 3642 unsigned Alignment = 0; 3643 if (ParseType(Ty)) return true; 3644 3645 if (EatIfPresent(lltok::comma)) { 3646 if (Lex.getKind() == lltok::kw_align 3647 || Lex.getKind() == lltok::NamedOrCustomMD) { 3648 if (ParseOptionalInfo(Alignment)) return true; 3649 } else { 3650 if (ParseTypeAndValue(Size, SizeLoc, PFS)) return true; 3651 if (EatIfPresent(lltok::comma)) 3652 if (ParseOptionalInfo(Alignment)) return true; 3653 } 3654 } 3655 3656 if (Size && Size->getType() != Type::getInt32Ty(Context)) 3657 return Error(SizeLoc, "element count must be i32"); 3658 3659 if (isAlloca) { 3660 Inst = new AllocaInst(Ty, Size, Alignment); 3661 return false; 3662 } 3663 3664 // Autoupgrade old malloc instruction to malloc call. 3665 // FIXME: Remove in LLVM 3.0. 3666 const Type *IntPtrTy = Type::getInt32Ty(Context); 3667 Constant *AllocSize = ConstantExpr::getSizeOf(Ty); 3668 AllocSize = ConstantExpr::getTruncOrBitCast(AllocSize, IntPtrTy); 3669 if (!MallocF) 3670 // Prototype malloc as "void *(int32)". 3671 // This function is renamed as "malloc" in ValidateEndOfModule(). 3672 MallocF = cast<Function>( 3673 M->getOrInsertFunction("", Type::getInt8PtrTy(Context), IntPtrTy, NULL)); 3674 Inst = CallInst::CreateMalloc(BB, IntPtrTy, Ty, AllocSize, Size, MallocF); 3675 return false; 3676} 3677 3678/// ParseFree 3679/// ::= 'free' TypeAndValue 3680bool LLParser::ParseFree(Instruction *&Inst, PerFunctionState &PFS, 3681 BasicBlock* BB) { 3682 Value *Val; LocTy Loc; 3683 if (ParseTypeAndValue(Val, Loc, PFS)) return true; 3684 if (!isa<PointerType>(Val->getType())) 3685 return Error(Loc, "operand to free must be a pointer"); 3686 Inst = CallInst::CreateFree(Val, BB); 3687 return false; 3688} 3689 3690/// ParseLoad 3691/// ::= 'volatile'? 'load' TypeAndValue (',' OptionalInfo)? 3692bool LLParser::ParseLoad(Instruction *&Inst, PerFunctionState &PFS, 3693 bool isVolatile) { 3694 Value *Val; LocTy Loc; 3695 unsigned Alignment = 0; 3696 if (ParseTypeAndValue(Val, Loc, PFS)) return true; 3697 3698 if (EatIfPresent(lltok::comma)) 3699 if (ParseOptionalInfo(Alignment)) return true; 3700 3701 if (!isa<PointerType>(Val->getType()) || 3702 !cast<PointerType>(Val->getType())->getElementType()->isFirstClassType()) 3703 return Error(Loc, "load operand must be a pointer to a first class type"); 3704 3705 Inst = new LoadInst(Val, "", isVolatile, Alignment); 3706 return false; 3707} 3708 3709/// ParseStore 3710/// ::= 'volatile'? 'store' TypeAndValue ',' TypeAndValue (',' 'align' i32)? 3711bool LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS, 3712 bool isVolatile) { 3713 Value *Val, *Ptr; LocTy Loc, PtrLoc; 3714 unsigned Alignment = 0; 3715 if (ParseTypeAndValue(Val, Loc, PFS) || 3716 ParseToken(lltok::comma, "expected ',' after store operand") || 3717 ParseTypeAndValue(Ptr, PtrLoc, PFS)) 3718 return true; 3719 3720 if (EatIfPresent(lltok::comma)) 3721 if (ParseOptionalInfo(Alignment)) return true; 3722 3723 if (!isa<PointerType>(Ptr->getType())) 3724 return Error(PtrLoc, "store operand must be a pointer"); 3725 if (!Val->getType()->isFirstClassType()) 3726 return Error(Loc, "store operand must be a first class value"); 3727 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType()) 3728 return Error(Loc, "stored value and pointer type do not match"); 3729 3730 Inst = new StoreInst(Val, Ptr, isVolatile, Alignment); 3731 return false; 3732} 3733 3734/// ParseGetResult 3735/// ::= 'getresult' TypeAndValue ',' i32 3736/// FIXME: Remove support for getresult in LLVM 3.0 3737bool LLParser::ParseGetResult(Instruction *&Inst, PerFunctionState &PFS) { 3738 Value *Val; LocTy ValLoc, EltLoc; 3739 unsigned Element; 3740 if (ParseTypeAndValue(Val, ValLoc, PFS) || 3741 ParseToken(lltok::comma, "expected ',' after getresult operand") || 3742 ParseUInt32(Element, EltLoc)) 3743 return true; 3744 3745 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 3746 return Error(ValLoc, "getresult inst requires an aggregate operand"); 3747 if (!ExtractValueInst::getIndexedType(Val->getType(), Element)) 3748 return Error(EltLoc, "invalid getresult index for value"); 3749 Inst = ExtractValueInst::Create(Val, Element); 3750 return false; 3751} 3752 3753/// ParseGetElementPtr 3754/// ::= 'getelementptr' 'inbounds'? TypeAndValue (',' TypeAndValue)* 3755bool LLParser::ParseGetElementPtr(Instruction *&Inst, PerFunctionState &PFS) { 3756 Value *Ptr, *Val; LocTy Loc, EltLoc; 3757 3758 bool InBounds = EatIfPresent(lltok::kw_inbounds); 3759 3760 if (ParseTypeAndValue(Ptr, Loc, PFS)) return true; 3761 3762 if (!isa<PointerType>(Ptr->getType())) 3763 return Error(Loc, "base of getelementptr must be a pointer"); 3764 3765 SmallVector<Value*, 16> Indices; 3766 while (EatIfPresent(lltok::comma)) { 3767 if (Lex.getKind() == lltok::NamedOrCustomMD) 3768 break; 3769 if (ParseTypeAndValue(Val, EltLoc, PFS)) return true; 3770 if (!isa<IntegerType>(Val->getType())) 3771 return Error(EltLoc, "getelementptr index must be an integer"); 3772 Indices.push_back(Val); 3773 } 3774 if (Lex.getKind() == lltok::NamedOrCustomMD) 3775 if (ParseOptionalCustomMetadata()) return true; 3776 3777 if (!GetElementPtrInst::getIndexedType(Ptr->getType(), 3778 Indices.begin(), Indices.end())) 3779 return Error(Loc, "invalid getelementptr indices"); 3780 Inst = GetElementPtrInst::Create(Ptr, Indices.begin(), Indices.end()); 3781 if (InBounds) 3782 cast<GetElementPtrInst>(Inst)->setIsInBounds(true); 3783 return false; 3784} 3785 3786/// ParseExtractValue 3787/// ::= 'extractvalue' TypeAndValue (',' uint32)+ 3788bool LLParser::ParseExtractValue(Instruction *&Inst, PerFunctionState &PFS) { 3789 Value *Val; LocTy Loc; 3790 SmallVector<unsigned, 4> Indices; 3791 if (ParseTypeAndValue(Val, Loc, PFS) || 3792 ParseIndexList(Indices)) 3793 return true; 3794 if (Lex.getKind() == lltok::NamedOrCustomMD) 3795 if (ParseOptionalCustomMetadata()) return true; 3796 3797 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 3798 return Error(Loc, "extractvalue operand must be array or struct"); 3799 3800 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 3801 Indices.end())) 3802 return Error(Loc, "invalid indices for extractvalue"); 3803 Inst = ExtractValueInst::Create(Val, Indices.begin(), Indices.end()); 3804 return false; 3805} 3806 3807/// ParseInsertValue 3808/// ::= 'insertvalue' TypeAndValue ',' TypeAndValue (',' uint32)+ 3809bool LLParser::ParseInsertValue(Instruction *&Inst, PerFunctionState &PFS) { 3810 Value *Val0, *Val1; LocTy Loc0, Loc1; 3811 SmallVector<unsigned, 4> Indices; 3812 if (ParseTypeAndValue(Val0, Loc0, PFS) || 3813 ParseToken(lltok::comma, "expected comma after insertvalue operand") || 3814 ParseTypeAndValue(Val1, Loc1, PFS) || 3815 ParseIndexList(Indices)) 3816 return true; 3817 if (Lex.getKind() == lltok::NamedOrCustomMD) 3818 if (ParseOptionalCustomMetadata()) return true; 3819 3820 if (!isa<StructType>(Val0->getType()) && !isa<ArrayType>(Val0->getType())) 3821 return Error(Loc0, "extractvalue operand must be array or struct"); 3822 3823 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 3824 Indices.end())) 3825 return Error(Loc0, "invalid indices for insertvalue"); 3826 Inst = InsertValueInst::Create(Val0, Val1, Indices.begin(), Indices.end()); 3827 return false; 3828} 3829 3830//===----------------------------------------------------------------------===// 3831// Embedded metadata. 3832//===----------------------------------------------------------------------===// 3833 3834/// ParseMDNodeVector 3835/// ::= Element (',' Element)* 3836/// Element 3837/// ::= 'null' | TypeAndValue 3838bool LLParser::ParseMDNodeVector(SmallVectorImpl<Value*> &Elts) { 3839 assert(Lex.getKind() == lltok::lbrace); 3840 Lex.Lex(); 3841 do { 3842 Value *V = 0; 3843 if (Lex.getKind() == lltok::kw_null) { 3844 Lex.Lex(); 3845 V = 0; 3846 } else { 3847 PATypeHolder Ty(Type::getVoidTy(Context)); 3848 if (ParseType(Ty)) return true; 3849 if (Lex.getKind() == lltok::Metadata) { 3850 Lex.Lex(); 3851 MetadataBase *Node = 0; 3852 if (!ParseMDNode(Node)) 3853 V = Node; 3854 else { 3855 MetadataBase *MDS = 0; 3856 if (ParseMDString(MDS)) return true; 3857 V = MDS; 3858 } 3859 } else { 3860 Constant *C; 3861 if (ParseGlobalValue(Ty, C)) return true; 3862 V = C; 3863 } 3864 } 3865 Elts.push_back(V); 3866 } while (EatIfPresent(lltok::comma)); 3867 3868 return false; 3869} 3870