LLParser.cpp revision ff03048c1350fcc4fda1ef6d6c57252f3a950854
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/Module.h" 22#include "llvm/Operator.h" 23#include "llvm/ValueSymbolTable.h" 24#include "llvm/ADT/SmallPtrSet.h" 25#include "llvm/Support/ErrorHandling.h" 26#include "llvm/Support/raw_ostream.h" 27using namespace llvm; 28 29static std::string getTypeString(Type *T) { 30 std::string Result; 31 raw_string_ostream Tmp(Result); 32 Tmp << *T; 33 return Tmp.str(); 34} 35 36/// Run: module ::= toplevelentity* 37bool LLParser::Run() { 38 // Prime the lexer. 39 Lex.Lex(); 40 41 return ParseTopLevelEntities() || 42 ValidateEndOfModule(); 43} 44 45/// ValidateEndOfModule - Do final validity and sanity checks at the end of the 46/// module. 47bool LLParser::ValidateEndOfModule() { 48 // Handle any instruction metadata forward references. 49 if (!ForwardRefInstMetadata.empty()) { 50 for (DenseMap<Instruction*, std::vector<MDRef> >::iterator 51 I = ForwardRefInstMetadata.begin(), E = ForwardRefInstMetadata.end(); 52 I != E; ++I) { 53 Instruction *Inst = I->first; 54 const std::vector<MDRef> &MDList = I->second; 55 56 for (unsigned i = 0, e = MDList.size(); i != e; ++i) { 57 unsigned SlotNo = MDList[i].MDSlot; 58 59 if (SlotNo >= NumberedMetadata.size() || NumberedMetadata[SlotNo] == 0) 60 return Error(MDList[i].Loc, "use of undefined metadata '!" + 61 Twine(SlotNo) + "'"); 62 Inst->setMetadata(MDList[i].MDKind, NumberedMetadata[SlotNo]); 63 } 64 } 65 ForwardRefInstMetadata.clear(); 66 } 67 68 69 // If there are entries in ForwardRefBlockAddresses at this point, they are 70 // references after the function was defined. Resolve those now. 71 while (!ForwardRefBlockAddresses.empty()) { 72 // Okay, we are referencing an already-parsed function, resolve them now. 73 Function *TheFn = 0; 74 const ValID &Fn = ForwardRefBlockAddresses.begin()->first; 75 if (Fn.Kind == ValID::t_GlobalName) 76 TheFn = M->getFunction(Fn.StrVal); 77 else if (Fn.UIntVal < NumberedVals.size()) 78 TheFn = dyn_cast<Function>(NumberedVals[Fn.UIntVal]); 79 80 if (TheFn == 0) 81 return Error(Fn.Loc, "unknown function referenced by blockaddress"); 82 83 // Resolve all these references. 84 if (ResolveForwardRefBlockAddresses(TheFn, 85 ForwardRefBlockAddresses.begin()->second, 86 0)) 87 return true; 88 89 ForwardRefBlockAddresses.erase(ForwardRefBlockAddresses.begin()); 90 } 91 92 for (unsigned i = 0, e = NumberedTypes.size(); i != e; ++i) 93 if (NumberedTypes[i].second.isValid()) 94 return Error(NumberedTypes[i].second, 95 "use of undefined type '%" + Twine(i) + "'"); 96 97 for (StringMap<std::pair<Type*, LocTy> >::iterator I = 98 NamedTypes.begin(), E = NamedTypes.end(); I != E; ++I) 99 if (I->second.second.isValid()) 100 return Error(I->second.second, 101 "use of undefined type named '" + I->getKey() + "'"); 102 103 if (!ForwardRefVals.empty()) 104 return Error(ForwardRefVals.begin()->second.second, 105 "use of undefined value '@" + ForwardRefVals.begin()->first + 106 "'"); 107 108 if (!ForwardRefValIDs.empty()) 109 return Error(ForwardRefValIDs.begin()->second.second, 110 "use of undefined value '@" + 111 Twine(ForwardRefValIDs.begin()->first) + "'"); 112 113 if (!ForwardRefMDNodes.empty()) 114 return Error(ForwardRefMDNodes.begin()->second.second, 115 "use of undefined metadata '!" + 116 Twine(ForwardRefMDNodes.begin()->first) + "'"); 117 118 119 // Look for intrinsic functions and CallInst that need to be upgraded 120 for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ) 121 UpgradeCallsToIntrinsic(FI++); // must be post-increment, as we remove 122 123 // Check debug info intrinsics. 124 CheckDebugInfoIntrinsics(M); 125 return false; 126} 127 128bool LLParser::ResolveForwardRefBlockAddresses(Function *TheFn, 129 std::vector<std::pair<ValID, GlobalValue*> > &Refs, 130 PerFunctionState *PFS) { 131 // Loop over all the references, resolving them. 132 for (unsigned i = 0, e = Refs.size(); i != e; ++i) { 133 BasicBlock *Res; 134 if (PFS) { 135 if (Refs[i].first.Kind == ValID::t_LocalName) 136 Res = PFS->GetBB(Refs[i].first.StrVal, Refs[i].first.Loc); 137 else 138 Res = PFS->GetBB(Refs[i].first.UIntVal, Refs[i].first.Loc); 139 } else if (Refs[i].first.Kind == ValID::t_LocalID) { 140 return Error(Refs[i].first.Loc, 141 "cannot take address of numeric label after the function is defined"); 142 } else { 143 Res = dyn_cast_or_null<BasicBlock>( 144 TheFn->getValueSymbolTable().lookup(Refs[i].first.StrVal)); 145 } 146 147 if (Res == 0) 148 return Error(Refs[i].first.Loc, 149 "referenced value is not a basic block"); 150 151 // Get the BlockAddress for this and update references to use it. 152 BlockAddress *BA = BlockAddress::get(TheFn, Res); 153 Refs[i].second->replaceAllUsesWith(BA); 154 Refs[i].second->eraseFromParent(); 155 } 156 return false; 157} 158 159 160//===----------------------------------------------------------------------===// 161// Top-Level Entities 162//===----------------------------------------------------------------------===// 163 164bool LLParser::ParseTopLevelEntities() { 165 while (1) { 166 switch (Lex.getKind()) { 167 default: return TokError("expected top-level entity"); 168 case lltok::Eof: return false; 169 case lltok::kw_declare: if (ParseDeclare()) return true; break; 170 case lltok::kw_define: if (ParseDefine()) return true; break; 171 case lltok::kw_module: if (ParseModuleAsm()) return true; break; 172 case lltok::kw_target: if (ParseTargetDefinition()) return true; break; 173 case lltok::kw_deplibs: if (ParseDepLibs()) return true; break; 174 case lltok::LocalVarID: if (ParseUnnamedType()) return true; break; 175 case lltok::LocalVar: if (ParseNamedType()) return true; break; 176 case lltok::GlobalID: if (ParseUnnamedGlobal()) return true; break; 177 case lltok::GlobalVar: if (ParseNamedGlobal()) return true; break; 178 case lltok::exclaim: if (ParseStandaloneMetadata()) return true; break; 179 case lltok::MetadataVar: if (ParseNamedMetadata()) return true; break; 180 181 // The Global variable production with no name can have many different 182 // optional leading prefixes, the production is: 183 // GlobalVar ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 184 // OptionalAddrSpace OptionalUnNammedAddr 185 // ('constant'|'global') ... 186 case lltok::kw_private: // OptionalLinkage 187 case lltok::kw_linker_private: // OptionalLinkage 188 case lltok::kw_linker_private_weak: // OptionalLinkage 189 case lltok::kw_linker_private_weak_def_auto: // OptionalLinkage 190 case lltok::kw_internal: // OptionalLinkage 191 case lltok::kw_weak: // OptionalLinkage 192 case lltok::kw_weak_odr: // OptionalLinkage 193 case lltok::kw_linkonce: // OptionalLinkage 194 case lltok::kw_linkonce_odr: // OptionalLinkage 195 case lltok::kw_appending: // OptionalLinkage 196 case lltok::kw_dllexport: // OptionalLinkage 197 case lltok::kw_common: // OptionalLinkage 198 case lltok::kw_dllimport: // OptionalLinkage 199 case lltok::kw_extern_weak: // OptionalLinkage 200 case lltok::kw_external: { // OptionalLinkage 201 unsigned Linkage, Visibility; 202 if (ParseOptionalLinkage(Linkage) || 203 ParseOptionalVisibility(Visibility) || 204 ParseGlobal("", SMLoc(), Linkage, true, Visibility)) 205 return true; 206 break; 207 } 208 case lltok::kw_default: // OptionalVisibility 209 case lltok::kw_hidden: // OptionalVisibility 210 case lltok::kw_protected: { // OptionalVisibility 211 unsigned Visibility; 212 if (ParseOptionalVisibility(Visibility) || 213 ParseGlobal("", SMLoc(), 0, false, Visibility)) 214 return true; 215 break; 216 } 217 218 case lltok::kw_thread_local: // OptionalThreadLocal 219 case lltok::kw_addrspace: // OptionalAddrSpace 220 case lltok::kw_constant: // GlobalType 221 case lltok::kw_global: // GlobalType 222 if (ParseGlobal("", SMLoc(), 0, false, 0)) return true; 223 break; 224 } 225 } 226} 227 228 229/// toplevelentity 230/// ::= 'module' 'asm' STRINGCONSTANT 231bool LLParser::ParseModuleAsm() { 232 assert(Lex.getKind() == lltok::kw_module); 233 Lex.Lex(); 234 235 std::string AsmStr; 236 if (ParseToken(lltok::kw_asm, "expected 'module asm'") || 237 ParseStringConstant(AsmStr)) return true; 238 239 M->appendModuleInlineAsm(AsmStr); 240 return false; 241} 242 243/// toplevelentity 244/// ::= 'target' 'triple' '=' STRINGCONSTANT 245/// ::= 'target' 'datalayout' '=' STRINGCONSTANT 246bool LLParser::ParseTargetDefinition() { 247 assert(Lex.getKind() == lltok::kw_target); 248 std::string Str; 249 switch (Lex.Lex()) { 250 default: return TokError("unknown target property"); 251 case lltok::kw_triple: 252 Lex.Lex(); 253 if (ParseToken(lltok::equal, "expected '=' after target triple") || 254 ParseStringConstant(Str)) 255 return true; 256 M->setTargetTriple(Str); 257 return false; 258 case lltok::kw_datalayout: 259 Lex.Lex(); 260 if (ParseToken(lltok::equal, "expected '=' after target datalayout") || 261 ParseStringConstant(Str)) 262 return true; 263 M->setDataLayout(Str); 264 return false; 265 } 266} 267 268/// toplevelentity 269/// ::= 'deplibs' '=' '[' ']' 270/// ::= 'deplibs' '=' '[' STRINGCONSTANT (',' STRINGCONSTANT)* ']' 271bool LLParser::ParseDepLibs() { 272 assert(Lex.getKind() == lltok::kw_deplibs); 273 Lex.Lex(); 274 if (ParseToken(lltok::equal, "expected '=' after deplibs") || 275 ParseToken(lltok::lsquare, "expected '=' after deplibs")) 276 return true; 277 278 if (EatIfPresent(lltok::rsquare)) 279 return false; 280 281 std::string Str; 282 if (ParseStringConstant(Str)) return true; 283 M->addLibrary(Str); 284 285 while (EatIfPresent(lltok::comma)) { 286 if (ParseStringConstant(Str)) return true; 287 M->addLibrary(Str); 288 } 289 290 return ParseToken(lltok::rsquare, "expected ']' at end of list"); 291} 292 293/// ParseUnnamedType: 294/// ::= LocalVarID '=' 'type' type 295bool LLParser::ParseUnnamedType() { 296 LocTy TypeLoc = Lex.getLoc(); 297 unsigned TypeID = Lex.getUIntVal(); 298 Lex.Lex(); // eat LocalVarID; 299 300 if (ParseToken(lltok::equal, "expected '=' after name") || 301 ParseToken(lltok::kw_type, "expected 'type' after '='")) 302 return true; 303 304 if (TypeID >= NumberedTypes.size()) 305 NumberedTypes.resize(TypeID+1); 306 307 Type *Result = 0; 308 if (ParseStructDefinition(TypeLoc, "", 309 NumberedTypes[TypeID], Result)) return true; 310 311 if (!isa<StructType>(Result)) { 312 std::pair<Type*, LocTy> &Entry = NumberedTypes[TypeID]; 313 if (Entry.first) 314 return Error(TypeLoc, "non-struct types may not be recursive"); 315 Entry.first = Result; 316 Entry.second = SMLoc(); 317 } 318 319 return false; 320} 321 322 323/// toplevelentity 324/// ::= LocalVar '=' 'type' type 325bool LLParser::ParseNamedType() { 326 std::string Name = Lex.getStrVal(); 327 LocTy NameLoc = Lex.getLoc(); 328 Lex.Lex(); // eat LocalVar. 329 330 if (ParseToken(lltok::equal, "expected '=' after name") || 331 ParseToken(lltok::kw_type, "expected 'type' after name")) 332 return true; 333 334 Type *Result = 0; 335 if (ParseStructDefinition(NameLoc, Name, 336 NamedTypes[Name], Result)) return true; 337 338 if (!isa<StructType>(Result)) { 339 std::pair<Type*, LocTy> &Entry = NamedTypes[Name]; 340 if (Entry.first) 341 return Error(NameLoc, "non-struct types may not be recursive"); 342 Entry.first = Result; 343 Entry.second = SMLoc(); 344 } 345 346 return false; 347} 348 349 350/// toplevelentity 351/// ::= 'declare' FunctionHeader 352bool LLParser::ParseDeclare() { 353 assert(Lex.getKind() == lltok::kw_declare); 354 Lex.Lex(); 355 356 Function *F; 357 return ParseFunctionHeader(F, false); 358} 359 360/// toplevelentity 361/// ::= 'define' FunctionHeader '{' ... 362bool LLParser::ParseDefine() { 363 assert(Lex.getKind() == lltok::kw_define); 364 Lex.Lex(); 365 366 Function *F; 367 return ParseFunctionHeader(F, true) || 368 ParseFunctionBody(*F); 369} 370 371/// ParseGlobalType 372/// ::= 'constant' 373/// ::= 'global' 374bool LLParser::ParseGlobalType(bool &IsConstant) { 375 if (Lex.getKind() == lltok::kw_constant) 376 IsConstant = true; 377 else if (Lex.getKind() == lltok::kw_global) 378 IsConstant = false; 379 else { 380 IsConstant = false; 381 return TokError("expected 'global' or 'constant'"); 382 } 383 Lex.Lex(); 384 return false; 385} 386 387/// ParseUnnamedGlobal: 388/// OptionalVisibility ALIAS ... 389/// OptionalLinkage OptionalVisibility ... -> global variable 390/// GlobalID '=' OptionalVisibility ALIAS ... 391/// GlobalID '=' OptionalLinkage OptionalVisibility ... -> global variable 392bool LLParser::ParseUnnamedGlobal() { 393 unsigned VarID = NumberedVals.size(); 394 std::string Name; 395 LocTy NameLoc = Lex.getLoc(); 396 397 // Handle the GlobalID form. 398 if (Lex.getKind() == lltok::GlobalID) { 399 if (Lex.getUIntVal() != VarID) 400 return Error(Lex.getLoc(), "variable expected to be numbered '%" + 401 Twine(VarID) + "'"); 402 Lex.Lex(); // eat GlobalID; 403 404 if (ParseToken(lltok::equal, "expected '=' after name")) 405 return true; 406 } 407 408 bool HasLinkage; 409 unsigned Linkage, Visibility; 410 if (ParseOptionalLinkage(Linkage, HasLinkage) || 411 ParseOptionalVisibility(Visibility)) 412 return true; 413 414 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 415 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 416 return ParseAlias(Name, NameLoc, Visibility); 417} 418 419/// ParseNamedGlobal: 420/// GlobalVar '=' OptionalVisibility ALIAS ... 421/// GlobalVar '=' OptionalLinkage OptionalVisibility ... -> global variable 422bool LLParser::ParseNamedGlobal() { 423 assert(Lex.getKind() == lltok::GlobalVar); 424 LocTy NameLoc = Lex.getLoc(); 425 std::string Name = Lex.getStrVal(); 426 Lex.Lex(); 427 428 bool HasLinkage; 429 unsigned Linkage, Visibility; 430 if (ParseToken(lltok::equal, "expected '=' in global variable") || 431 ParseOptionalLinkage(Linkage, HasLinkage) || 432 ParseOptionalVisibility(Visibility)) 433 return true; 434 435 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 436 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 437 return ParseAlias(Name, NameLoc, Visibility); 438} 439 440// MDString: 441// ::= '!' STRINGCONSTANT 442bool LLParser::ParseMDString(MDString *&Result) { 443 std::string Str; 444 if (ParseStringConstant(Str)) return true; 445 Result = MDString::get(Context, Str); 446 return false; 447} 448 449// MDNode: 450// ::= '!' MDNodeNumber 451// 452/// This version of ParseMDNodeID returns the slot number and null in the case 453/// of a forward reference. 454bool LLParser::ParseMDNodeID(MDNode *&Result, unsigned &SlotNo) { 455 // !{ ..., !42, ... } 456 if (ParseUInt32(SlotNo)) return true; 457 458 // Check existing MDNode. 459 if (SlotNo < NumberedMetadata.size() && NumberedMetadata[SlotNo] != 0) 460 Result = NumberedMetadata[SlotNo]; 461 else 462 Result = 0; 463 return false; 464} 465 466bool LLParser::ParseMDNodeID(MDNode *&Result) { 467 // !{ ..., !42, ... } 468 unsigned MID = 0; 469 if (ParseMDNodeID(Result, MID)) return true; 470 471 // If not a forward reference, just return it now. 472 if (Result) return false; 473 474 // Otherwise, create MDNode forward reference. 475 MDNode *FwdNode = MDNode::getTemporary(Context, ArrayRef<Value*>()); 476 ForwardRefMDNodes[MID] = std::make_pair(FwdNode, Lex.getLoc()); 477 478 if (NumberedMetadata.size() <= MID) 479 NumberedMetadata.resize(MID+1); 480 NumberedMetadata[MID] = FwdNode; 481 Result = FwdNode; 482 return false; 483} 484 485/// ParseNamedMetadata: 486/// !foo = !{ !1, !2 } 487bool LLParser::ParseNamedMetadata() { 488 assert(Lex.getKind() == lltok::MetadataVar); 489 std::string Name = Lex.getStrVal(); 490 Lex.Lex(); 491 492 if (ParseToken(lltok::equal, "expected '=' here") || 493 ParseToken(lltok::exclaim, "Expected '!' here") || 494 ParseToken(lltok::lbrace, "Expected '{' here")) 495 return true; 496 497 NamedMDNode *NMD = M->getOrInsertNamedMetadata(Name); 498 if (Lex.getKind() != lltok::rbrace) 499 do { 500 if (ParseToken(lltok::exclaim, "Expected '!' here")) 501 return true; 502 503 MDNode *N = 0; 504 if (ParseMDNodeID(N)) return true; 505 NMD->addOperand(N); 506 } while (EatIfPresent(lltok::comma)); 507 508 if (ParseToken(lltok::rbrace, "expected end of metadata node")) 509 return true; 510 511 return false; 512} 513 514/// ParseStandaloneMetadata: 515/// !42 = !{...} 516bool LLParser::ParseStandaloneMetadata() { 517 assert(Lex.getKind() == lltok::exclaim); 518 Lex.Lex(); 519 unsigned MetadataID = 0; 520 521 LocTy TyLoc; 522 Type *Ty = 0; 523 SmallVector<Value *, 16> Elts; 524 if (ParseUInt32(MetadataID) || 525 ParseToken(lltok::equal, "expected '=' here") || 526 ParseType(Ty, TyLoc) || 527 ParseToken(lltok::exclaim, "Expected '!' here") || 528 ParseToken(lltok::lbrace, "Expected '{' here") || 529 ParseMDNodeVector(Elts, NULL) || 530 ParseToken(lltok::rbrace, "expected end of metadata node")) 531 return true; 532 533 MDNode *Init = MDNode::get(Context, Elts); 534 535 // See if this was forward referenced, if so, handle it. 536 std::map<unsigned, std::pair<TrackingVH<MDNode>, LocTy> >::iterator 537 FI = ForwardRefMDNodes.find(MetadataID); 538 if (FI != ForwardRefMDNodes.end()) { 539 MDNode *Temp = FI->second.first; 540 Temp->replaceAllUsesWith(Init); 541 MDNode::deleteTemporary(Temp); 542 ForwardRefMDNodes.erase(FI); 543 544 assert(NumberedMetadata[MetadataID] == Init && "Tracking VH didn't work"); 545 } else { 546 if (MetadataID >= NumberedMetadata.size()) 547 NumberedMetadata.resize(MetadataID+1); 548 549 if (NumberedMetadata[MetadataID] != 0) 550 return TokError("Metadata id is already used"); 551 NumberedMetadata[MetadataID] = Init; 552 } 553 554 return false; 555} 556 557/// ParseAlias: 558/// ::= GlobalVar '=' OptionalVisibility 'alias' OptionalLinkage Aliasee 559/// Aliasee 560/// ::= TypeAndValue 561/// ::= 'bitcast' '(' TypeAndValue 'to' Type ')' 562/// ::= 'getelementptr' 'inbounds'? '(' ... ')' 563/// 564/// Everything through visibility has already been parsed. 565/// 566bool LLParser::ParseAlias(const std::string &Name, LocTy NameLoc, 567 unsigned Visibility) { 568 assert(Lex.getKind() == lltok::kw_alias); 569 Lex.Lex(); 570 unsigned Linkage; 571 LocTy LinkageLoc = Lex.getLoc(); 572 if (ParseOptionalLinkage(Linkage)) 573 return true; 574 575 if (Linkage != GlobalValue::ExternalLinkage && 576 Linkage != GlobalValue::WeakAnyLinkage && 577 Linkage != GlobalValue::WeakODRLinkage && 578 Linkage != GlobalValue::InternalLinkage && 579 Linkage != GlobalValue::PrivateLinkage && 580 Linkage != GlobalValue::LinkerPrivateLinkage && 581 Linkage != GlobalValue::LinkerPrivateWeakLinkage && 582 Linkage != GlobalValue::LinkerPrivateWeakDefAutoLinkage) 583 return Error(LinkageLoc, "invalid linkage type for alias"); 584 585 Constant *Aliasee; 586 LocTy AliaseeLoc = Lex.getLoc(); 587 if (Lex.getKind() != lltok::kw_bitcast && 588 Lex.getKind() != lltok::kw_getelementptr) { 589 if (ParseGlobalTypeAndValue(Aliasee)) return true; 590 } else { 591 // The bitcast dest type is not present, it is implied by the dest type. 592 ValID ID; 593 if (ParseValID(ID)) return true; 594 if (ID.Kind != ValID::t_Constant) 595 return Error(AliaseeLoc, "invalid aliasee"); 596 Aliasee = ID.ConstantVal; 597 } 598 599 if (!Aliasee->getType()->isPointerTy()) 600 return Error(AliaseeLoc, "alias must have pointer type"); 601 602 // Okay, create the alias but do not insert it into the module yet. 603 GlobalAlias* GA = new GlobalAlias(Aliasee->getType(), 604 (GlobalValue::LinkageTypes)Linkage, Name, 605 Aliasee); 606 GA->setVisibility((GlobalValue::VisibilityTypes)Visibility); 607 608 // See if this value already exists in the symbol table. If so, it is either 609 // a redefinition or a definition of a forward reference. 610 if (GlobalValue *Val = M->getNamedValue(Name)) { 611 // See if this was a redefinition. If so, there is no entry in 612 // ForwardRefVals. 613 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 614 I = ForwardRefVals.find(Name); 615 if (I == ForwardRefVals.end()) 616 return Error(NameLoc, "redefinition of global named '@" + Name + "'"); 617 618 // Otherwise, this was a definition of forward ref. Verify that types 619 // agree. 620 if (Val->getType() != GA->getType()) 621 return Error(NameLoc, 622 "forward reference and definition of alias have different types"); 623 624 // If they agree, just RAUW the old value with the alias and remove the 625 // forward ref info. 626 Val->replaceAllUsesWith(GA); 627 Val->eraseFromParent(); 628 ForwardRefVals.erase(I); 629 } 630 631 // Insert into the module, we know its name won't collide now. 632 M->getAliasList().push_back(GA); 633 assert(GA->getName() == Name && "Should not be a name conflict!"); 634 635 return false; 636} 637 638/// ParseGlobal 639/// ::= GlobalVar '=' OptionalLinkage OptionalVisibility OptionalThreadLocal 640/// OptionalAddrSpace OptionalUnNammedAddr GlobalType Type Const 641/// ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 642/// OptionalAddrSpace OptionalUnNammedAddr GlobalType Type Const 643/// 644/// Everything through visibility has been parsed already. 645/// 646bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc, 647 unsigned Linkage, bool HasLinkage, 648 unsigned Visibility) { 649 unsigned AddrSpace; 650 bool ThreadLocal, IsConstant, UnnamedAddr; 651 LocTy UnnamedAddrLoc; 652 LocTy TyLoc; 653 654 Type *Ty = 0; 655 if (ParseOptionalToken(lltok::kw_thread_local, ThreadLocal) || 656 ParseOptionalAddrSpace(AddrSpace) || 657 ParseOptionalToken(lltok::kw_unnamed_addr, UnnamedAddr, 658 &UnnamedAddrLoc) || 659 ParseGlobalType(IsConstant) || 660 ParseType(Ty, TyLoc)) 661 return true; 662 663 // If the linkage is specified and is external, then no initializer is 664 // present. 665 Constant *Init = 0; 666 if (!HasLinkage || (Linkage != GlobalValue::DLLImportLinkage && 667 Linkage != GlobalValue::ExternalWeakLinkage && 668 Linkage != GlobalValue::ExternalLinkage)) { 669 if (ParseGlobalValue(Ty, Init)) 670 return true; 671 } 672 673 if (Ty->isFunctionTy() || Ty->isLabelTy()) 674 return Error(TyLoc, "invalid type for global variable"); 675 676 GlobalVariable *GV = 0; 677 678 // See if the global was forward referenced, if so, use the global. 679 if (!Name.empty()) { 680 if (GlobalValue *GVal = M->getNamedValue(Name)) { 681 if (!ForwardRefVals.erase(Name) || !isa<GlobalValue>(GVal)) 682 return Error(NameLoc, "redefinition of global '@" + Name + "'"); 683 GV = cast<GlobalVariable>(GVal); 684 } 685 } else { 686 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 687 I = ForwardRefValIDs.find(NumberedVals.size()); 688 if (I != ForwardRefValIDs.end()) { 689 GV = cast<GlobalVariable>(I->second.first); 690 ForwardRefValIDs.erase(I); 691 } 692 } 693 694 if (GV == 0) { 695 GV = new GlobalVariable(*M, Ty, false, GlobalValue::ExternalLinkage, 0, 696 Name, 0, false, AddrSpace); 697 } else { 698 if (GV->getType()->getElementType() != Ty) 699 return Error(TyLoc, 700 "forward reference and definition of global have different types"); 701 702 // Move the forward-reference to the correct spot in the module. 703 M->getGlobalList().splice(M->global_end(), M->getGlobalList(), GV); 704 } 705 706 if (Name.empty()) 707 NumberedVals.push_back(GV); 708 709 // Set the parsed properties on the global. 710 if (Init) 711 GV->setInitializer(Init); 712 GV->setConstant(IsConstant); 713 GV->setLinkage((GlobalValue::LinkageTypes)Linkage); 714 GV->setVisibility((GlobalValue::VisibilityTypes)Visibility); 715 GV->setThreadLocal(ThreadLocal); 716 GV->setUnnamedAddr(UnnamedAddr); 717 718 // Parse attributes on the global. 719 while (Lex.getKind() == lltok::comma) { 720 Lex.Lex(); 721 722 if (Lex.getKind() == lltok::kw_section) { 723 Lex.Lex(); 724 GV->setSection(Lex.getStrVal()); 725 if (ParseToken(lltok::StringConstant, "expected global section string")) 726 return true; 727 } else if (Lex.getKind() == lltok::kw_align) { 728 unsigned Alignment; 729 if (ParseOptionalAlignment(Alignment)) return true; 730 GV->setAlignment(Alignment); 731 } else { 732 TokError("unknown global variable property!"); 733 } 734 } 735 736 return false; 737} 738 739 740//===----------------------------------------------------------------------===// 741// GlobalValue Reference/Resolution Routines. 742//===----------------------------------------------------------------------===// 743 744/// GetGlobalVal - Get a value with the specified name or ID, creating a 745/// forward reference record if needed. This can return null if the value 746/// exists but does not have the right type. 747GlobalValue *LLParser::GetGlobalVal(const std::string &Name, Type *Ty, 748 LocTy Loc) { 749 PointerType *PTy = dyn_cast<PointerType>(Ty); 750 if (PTy == 0) { 751 Error(Loc, "global variable reference must have pointer type"); 752 return 0; 753 } 754 755 // Look this name up in the normal function symbol table. 756 GlobalValue *Val = 757 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name)); 758 759 // If this is a forward reference for the value, see if we already created a 760 // forward ref record. 761 if (Val == 0) { 762 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 763 I = ForwardRefVals.find(Name); 764 if (I != ForwardRefVals.end()) 765 Val = I->second.first; 766 } 767 768 // If we have the value in the symbol table or fwd-ref table, return it. 769 if (Val) { 770 if (Val->getType() == Ty) return Val; 771 Error(Loc, "'@" + Name + "' defined with type '" + 772 getTypeString(Val->getType()) + "'"); 773 return 0; 774 } 775 776 // Otherwise, create a new forward reference for this value and remember it. 777 GlobalValue *FwdVal; 778 if (FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) 779 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M); 780 else 781 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 782 GlobalValue::ExternalWeakLinkage, 0, Name); 783 784 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 785 return FwdVal; 786} 787 788GlobalValue *LLParser::GetGlobalVal(unsigned ID, Type *Ty, LocTy Loc) { 789 PointerType *PTy = dyn_cast<PointerType>(Ty); 790 if (PTy == 0) { 791 Error(Loc, "global variable reference must have pointer type"); 792 return 0; 793 } 794 795 GlobalValue *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 796 797 // If this is a forward reference for the value, see if we already created a 798 // forward ref record. 799 if (Val == 0) { 800 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 801 I = ForwardRefValIDs.find(ID); 802 if (I != ForwardRefValIDs.end()) 803 Val = I->second.first; 804 } 805 806 // If we have the value in the symbol table or fwd-ref table, return it. 807 if (Val) { 808 if (Val->getType() == Ty) return Val; 809 Error(Loc, "'@" + Twine(ID) + "' defined with type '" + 810 getTypeString(Val->getType()) + "'"); 811 return 0; 812 } 813 814 // Otherwise, create a new forward reference for this value and remember it. 815 GlobalValue *FwdVal; 816 if (FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) 817 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, "", M); 818 else 819 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 820 GlobalValue::ExternalWeakLinkage, 0, ""); 821 822 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 823 return FwdVal; 824} 825 826 827//===----------------------------------------------------------------------===// 828// Helper Routines. 829//===----------------------------------------------------------------------===// 830 831/// ParseToken - If the current token has the specified kind, eat it and return 832/// success. Otherwise, emit the specified error and return failure. 833bool LLParser::ParseToken(lltok::Kind T, const char *ErrMsg) { 834 if (Lex.getKind() != T) 835 return TokError(ErrMsg); 836 Lex.Lex(); 837 return false; 838} 839 840/// ParseStringConstant 841/// ::= StringConstant 842bool LLParser::ParseStringConstant(std::string &Result) { 843 if (Lex.getKind() != lltok::StringConstant) 844 return TokError("expected string constant"); 845 Result = Lex.getStrVal(); 846 Lex.Lex(); 847 return false; 848} 849 850/// ParseUInt32 851/// ::= uint32 852bool LLParser::ParseUInt32(unsigned &Val) { 853 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned()) 854 return TokError("expected integer"); 855 uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(0xFFFFFFFFULL+1); 856 if (Val64 != unsigned(Val64)) 857 return TokError("expected 32-bit integer (too large)"); 858 Val = Val64; 859 Lex.Lex(); 860 return false; 861} 862 863 864/// ParseOptionalAddrSpace 865/// := /*empty*/ 866/// := 'addrspace' '(' uint32 ')' 867bool LLParser::ParseOptionalAddrSpace(unsigned &AddrSpace) { 868 AddrSpace = 0; 869 if (!EatIfPresent(lltok::kw_addrspace)) 870 return false; 871 return ParseToken(lltok::lparen, "expected '(' in address space") || 872 ParseUInt32(AddrSpace) || 873 ParseToken(lltok::rparen, "expected ')' in address space"); 874} 875 876/// ParseOptionalAttrs - Parse a potentially empty attribute list. AttrKind 877/// indicates what kind of attribute list this is: 0: function arg, 1: result, 878/// 2: function attr. 879bool LLParser::ParseOptionalAttrs(unsigned &Attrs, unsigned AttrKind) { 880 Attrs = Attribute::None; 881 LocTy AttrLoc = Lex.getLoc(); 882 883 while (1) { 884 switch (Lex.getKind()) { 885 default: // End of attributes. 886 if (AttrKind != 2 && (Attrs & Attribute::FunctionOnly)) 887 return Error(AttrLoc, "invalid use of function-only attribute"); 888 889 // As a hack, we allow "align 2" on functions as a synonym for 890 // "alignstack 2". 891 if (AttrKind == 2 && 892 (Attrs & ~(Attribute::FunctionOnly | Attribute::Alignment))) 893 return Error(AttrLoc, "invalid use of attribute on a function"); 894 895 if (AttrKind != 0 && (Attrs & Attribute::ParameterOnly)) 896 return Error(AttrLoc, "invalid use of parameter-only attribute"); 897 898 return false; 899 case lltok::kw_zeroext: Attrs |= Attribute::ZExt; break; 900 case lltok::kw_signext: Attrs |= Attribute::SExt; break; 901 case lltok::kw_inreg: Attrs |= Attribute::InReg; break; 902 case lltok::kw_sret: Attrs |= Attribute::StructRet; break; 903 case lltok::kw_noalias: Attrs |= Attribute::NoAlias; break; 904 case lltok::kw_nocapture: Attrs |= Attribute::NoCapture; break; 905 case lltok::kw_byval: Attrs |= Attribute::ByVal; break; 906 case lltok::kw_nest: Attrs |= Attribute::Nest; break; 907 908 case lltok::kw_noreturn: Attrs |= Attribute::NoReturn; break; 909 case lltok::kw_nounwind: Attrs |= Attribute::NoUnwind; break; 910 case lltok::kw_uwtable: Attrs |= Attribute::UWTable; break; 911 case lltok::kw_noinline: Attrs |= Attribute::NoInline; break; 912 case lltok::kw_readnone: Attrs |= Attribute::ReadNone; break; 913 case lltok::kw_readonly: Attrs |= Attribute::ReadOnly; break; 914 case lltok::kw_inlinehint: Attrs |= Attribute::InlineHint; break; 915 case lltok::kw_alwaysinline: Attrs |= Attribute::AlwaysInline; break; 916 case lltok::kw_optsize: Attrs |= Attribute::OptimizeForSize; break; 917 case lltok::kw_ssp: Attrs |= Attribute::StackProtect; break; 918 case lltok::kw_sspreq: Attrs |= Attribute::StackProtectReq; break; 919 case lltok::kw_noredzone: Attrs |= Attribute::NoRedZone; break; 920 case lltok::kw_noimplicitfloat: Attrs |= Attribute::NoImplicitFloat; break; 921 case lltok::kw_naked: Attrs |= Attribute::Naked; break; 922 case lltok::kw_hotpatch: Attrs |= Attribute::Hotpatch; break; 923 case lltok::kw_nonlazybind: Attrs |= Attribute::NonLazyBind; break; 924 925 case lltok::kw_alignstack: { 926 unsigned Alignment; 927 if (ParseOptionalStackAlignment(Alignment)) 928 return true; 929 Attrs |= Attribute::constructStackAlignmentFromInt(Alignment); 930 continue; 931 } 932 933 case lltok::kw_align: { 934 unsigned Alignment; 935 if (ParseOptionalAlignment(Alignment)) 936 return true; 937 Attrs |= Attribute::constructAlignmentFromInt(Alignment); 938 continue; 939 } 940 941 } 942 Lex.Lex(); 943 } 944} 945 946/// ParseOptionalLinkage 947/// ::= /*empty*/ 948/// ::= 'private' 949/// ::= 'linker_private' 950/// ::= 'linker_private_weak' 951/// ::= 'linker_private_weak_def_auto' 952/// ::= 'internal' 953/// ::= 'weak' 954/// ::= 'weak_odr' 955/// ::= 'linkonce' 956/// ::= 'linkonce_odr' 957/// ::= 'available_externally' 958/// ::= 'appending' 959/// ::= 'dllexport' 960/// ::= 'common' 961/// ::= 'dllimport' 962/// ::= 'extern_weak' 963/// ::= 'external' 964bool LLParser::ParseOptionalLinkage(unsigned &Res, bool &HasLinkage) { 965 HasLinkage = false; 966 switch (Lex.getKind()) { 967 default: Res=GlobalValue::ExternalLinkage; return false; 968 case lltok::kw_private: Res = GlobalValue::PrivateLinkage; break; 969 case lltok::kw_linker_private: Res = GlobalValue::LinkerPrivateLinkage; break; 970 case lltok::kw_linker_private_weak: 971 Res = GlobalValue::LinkerPrivateWeakLinkage; 972 break; 973 case lltok::kw_linker_private_weak_def_auto: 974 Res = GlobalValue::LinkerPrivateWeakDefAutoLinkage; 975 break; 976 case lltok::kw_internal: Res = GlobalValue::InternalLinkage; break; 977 case lltok::kw_weak: Res = GlobalValue::WeakAnyLinkage; break; 978 case lltok::kw_weak_odr: Res = GlobalValue::WeakODRLinkage; break; 979 case lltok::kw_linkonce: Res = GlobalValue::LinkOnceAnyLinkage; break; 980 case lltok::kw_linkonce_odr: Res = GlobalValue::LinkOnceODRLinkage; break; 981 case lltok::kw_available_externally: 982 Res = GlobalValue::AvailableExternallyLinkage; 983 break; 984 case lltok::kw_appending: Res = GlobalValue::AppendingLinkage; break; 985 case lltok::kw_dllexport: Res = GlobalValue::DLLExportLinkage; break; 986 case lltok::kw_common: Res = GlobalValue::CommonLinkage; break; 987 case lltok::kw_dllimport: Res = GlobalValue::DLLImportLinkage; break; 988 case lltok::kw_extern_weak: Res = GlobalValue::ExternalWeakLinkage; break; 989 case lltok::kw_external: Res = GlobalValue::ExternalLinkage; break; 990 } 991 Lex.Lex(); 992 HasLinkage = true; 993 return false; 994} 995 996/// ParseOptionalVisibility 997/// ::= /*empty*/ 998/// ::= 'default' 999/// ::= 'hidden' 1000/// ::= 'protected' 1001/// 1002bool LLParser::ParseOptionalVisibility(unsigned &Res) { 1003 switch (Lex.getKind()) { 1004 default: Res = GlobalValue::DefaultVisibility; return false; 1005 case lltok::kw_default: Res = GlobalValue::DefaultVisibility; break; 1006 case lltok::kw_hidden: Res = GlobalValue::HiddenVisibility; break; 1007 case lltok::kw_protected: Res = GlobalValue::ProtectedVisibility; break; 1008 } 1009 Lex.Lex(); 1010 return false; 1011} 1012 1013/// ParseOptionalCallingConv 1014/// ::= /*empty*/ 1015/// ::= 'ccc' 1016/// ::= 'fastcc' 1017/// ::= 'coldcc' 1018/// ::= 'x86_stdcallcc' 1019/// ::= 'x86_fastcallcc' 1020/// ::= 'x86_thiscallcc' 1021/// ::= 'arm_apcscc' 1022/// ::= 'arm_aapcscc' 1023/// ::= 'arm_aapcs_vfpcc' 1024/// ::= 'msp430_intrcc' 1025/// ::= 'ptx_kernel' 1026/// ::= 'ptx_device' 1027/// ::= 'cc' UINT 1028/// 1029bool LLParser::ParseOptionalCallingConv(CallingConv::ID &CC) { 1030 switch (Lex.getKind()) { 1031 default: CC = CallingConv::C; return false; 1032 case lltok::kw_ccc: CC = CallingConv::C; break; 1033 case lltok::kw_fastcc: CC = CallingConv::Fast; break; 1034 case lltok::kw_coldcc: CC = CallingConv::Cold; break; 1035 case lltok::kw_x86_stdcallcc: CC = CallingConv::X86_StdCall; break; 1036 case lltok::kw_x86_fastcallcc: CC = CallingConv::X86_FastCall; break; 1037 case lltok::kw_x86_thiscallcc: CC = CallingConv::X86_ThisCall; break; 1038 case lltok::kw_arm_apcscc: CC = CallingConv::ARM_APCS; break; 1039 case lltok::kw_arm_aapcscc: CC = CallingConv::ARM_AAPCS; break; 1040 case lltok::kw_arm_aapcs_vfpcc:CC = CallingConv::ARM_AAPCS_VFP; break; 1041 case lltok::kw_msp430_intrcc: CC = CallingConv::MSP430_INTR; break; 1042 case lltok::kw_ptx_kernel: CC = CallingConv::PTX_Kernel; break; 1043 case lltok::kw_ptx_device: CC = CallingConv::PTX_Device; break; 1044 case lltok::kw_cc: { 1045 unsigned ArbitraryCC; 1046 Lex.Lex(); 1047 if (ParseUInt32(ArbitraryCC)) { 1048 return true; 1049 } else 1050 CC = static_cast<CallingConv::ID>(ArbitraryCC); 1051 return false; 1052 } 1053 break; 1054 } 1055 1056 Lex.Lex(); 1057 return false; 1058} 1059 1060/// ParseInstructionMetadata 1061/// ::= !dbg !42 (',' !dbg !57)* 1062bool LLParser::ParseInstructionMetadata(Instruction *Inst, 1063 PerFunctionState *PFS) { 1064 do { 1065 if (Lex.getKind() != lltok::MetadataVar) 1066 return TokError("expected metadata after comma"); 1067 1068 std::string Name = Lex.getStrVal(); 1069 unsigned MDK = M->getMDKindID(Name.c_str()); 1070 Lex.Lex(); 1071 1072 MDNode *Node; 1073 SMLoc Loc = Lex.getLoc(); 1074 1075 if (ParseToken(lltok::exclaim, "expected '!' here")) 1076 return true; 1077 1078 // This code is similar to that of ParseMetadataValue, however it needs to 1079 // have special-case code for a forward reference; see the comments on 1080 // ForwardRefInstMetadata for details. Also, MDStrings are not supported 1081 // at the top level here. 1082 if (Lex.getKind() == lltok::lbrace) { 1083 ValID ID; 1084 if (ParseMetadataListValue(ID, PFS)) 1085 return true; 1086 assert(ID.Kind == ValID::t_MDNode); 1087 Inst->setMetadata(MDK, ID.MDNodeVal); 1088 } else { 1089 unsigned NodeID = 0; 1090 if (ParseMDNodeID(Node, NodeID)) 1091 return true; 1092 if (Node) { 1093 // If we got the node, add it to the instruction. 1094 Inst->setMetadata(MDK, Node); 1095 } else { 1096 MDRef R = { Loc, MDK, NodeID }; 1097 // Otherwise, remember that this should be resolved later. 1098 ForwardRefInstMetadata[Inst].push_back(R); 1099 } 1100 } 1101 1102 // If this is the end of the list, we're done. 1103 } while (EatIfPresent(lltok::comma)); 1104 return false; 1105} 1106 1107/// ParseOptionalAlignment 1108/// ::= /* empty */ 1109/// ::= 'align' 4 1110bool LLParser::ParseOptionalAlignment(unsigned &Alignment) { 1111 Alignment = 0; 1112 if (!EatIfPresent(lltok::kw_align)) 1113 return false; 1114 LocTy AlignLoc = Lex.getLoc(); 1115 if (ParseUInt32(Alignment)) return true; 1116 if (!isPowerOf2_32(Alignment)) 1117 return Error(AlignLoc, "alignment is not a power of two"); 1118 if (Alignment > Value::MaximumAlignment) 1119 return Error(AlignLoc, "huge alignments are not supported yet"); 1120 return false; 1121} 1122 1123/// ParseOptionalCommaAlign 1124/// ::= 1125/// ::= ',' align 4 1126/// 1127/// This returns with AteExtraComma set to true if it ate an excess comma at the 1128/// end. 1129bool LLParser::ParseOptionalCommaAlign(unsigned &Alignment, 1130 bool &AteExtraComma) { 1131 AteExtraComma = false; 1132 while (EatIfPresent(lltok::comma)) { 1133 // Metadata at the end is an early exit. 1134 if (Lex.getKind() == lltok::MetadataVar) { 1135 AteExtraComma = true; 1136 return false; 1137 } 1138 1139 if (Lex.getKind() != lltok::kw_align) 1140 return Error(Lex.getLoc(), "expected metadata or 'align'"); 1141 1142 if (ParseOptionalAlignment(Alignment)) return true; 1143 } 1144 1145 return false; 1146} 1147 1148/// ParseScopeAndOrdering 1149/// if isAtomic: ::= 'singlethread'? AtomicOrdering 1150/// else: ::= 1151/// 1152/// This sets Scope and Ordering to the parsed values. 1153bool LLParser::ParseScopeAndOrdering(bool isAtomic, SynchronizationScope &Scope, 1154 AtomicOrdering &Ordering) { 1155 if (!isAtomic) 1156 return false; 1157 1158 Scope = CrossThread; 1159 if (EatIfPresent(lltok::kw_singlethread)) 1160 Scope = SingleThread; 1161 switch (Lex.getKind()) { 1162 default: return TokError("Expected ordering on atomic instruction"); 1163 case lltok::kw_unordered: Ordering = Unordered; break; 1164 case lltok::kw_monotonic: Ordering = Monotonic; break; 1165 case lltok::kw_acquire: Ordering = Acquire; break; 1166 case lltok::kw_release: Ordering = Release; break; 1167 case lltok::kw_acq_rel: Ordering = AcquireRelease; break; 1168 case lltok::kw_seq_cst: Ordering = SequentiallyConsistent; break; 1169 } 1170 Lex.Lex(); 1171 return false; 1172} 1173 1174/// ParseOptionalStackAlignment 1175/// ::= /* empty */ 1176/// ::= 'alignstack' '(' 4 ')' 1177bool LLParser::ParseOptionalStackAlignment(unsigned &Alignment) { 1178 Alignment = 0; 1179 if (!EatIfPresent(lltok::kw_alignstack)) 1180 return false; 1181 LocTy ParenLoc = Lex.getLoc(); 1182 if (!EatIfPresent(lltok::lparen)) 1183 return Error(ParenLoc, "expected '('"); 1184 LocTy AlignLoc = Lex.getLoc(); 1185 if (ParseUInt32(Alignment)) return true; 1186 ParenLoc = Lex.getLoc(); 1187 if (!EatIfPresent(lltok::rparen)) 1188 return Error(ParenLoc, "expected ')'"); 1189 if (!isPowerOf2_32(Alignment)) 1190 return Error(AlignLoc, "stack alignment is not a power of two"); 1191 return false; 1192} 1193 1194/// ParseIndexList - This parses the index list for an insert/extractvalue 1195/// instruction. This sets AteExtraComma in the case where we eat an extra 1196/// comma at the end of the line and find that it is followed by metadata. 1197/// Clients that don't allow metadata can call the version of this function that 1198/// only takes one argument. 1199/// 1200/// ParseIndexList 1201/// ::= (',' uint32)+ 1202/// 1203bool LLParser::ParseIndexList(SmallVectorImpl<unsigned> &Indices, 1204 bool &AteExtraComma) { 1205 AteExtraComma = false; 1206 1207 if (Lex.getKind() != lltok::comma) 1208 return TokError("expected ',' as start of index list"); 1209 1210 while (EatIfPresent(lltok::comma)) { 1211 if (Lex.getKind() == lltok::MetadataVar) { 1212 AteExtraComma = true; 1213 return false; 1214 } 1215 unsigned Idx = 0; 1216 if (ParseUInt32(Idx)) return true; 1217 Indices.push_back(Idx); 1218 } 1219 1220 return false; 1221} 1222 1223//===----------------------------------------------------------------------===// 1224// Type Parsing. 1225//===----------------------------------------------------------------------===// 1226 1227/// ParseType - Parse a type. 1228bool LLParser::ParseType(Type *&Result, bool AllowVoid) { 1229 SMLoc TypeLoc = Lex.getLoc(); 1230 switch (Lex.getKind()) { 1231 default: 1232 return TokError("expected type"); 1233 case lltok::Type: 1234 // Type ::= 'float' | 'void' (etc) 1235 Result = Lex.getTyVal(); 1236 Lex.Lex(); 1237 break; 1238 case lltok::lbrace: 1239 // Type ::= StructType 1240 if (ParseAnonStructType(Result, false)) 1241 return true; 1242 break; 1243 case lltok::lsquare: 1244 // Type ::= '[' ... ']' 1245 Lex.Lex(); // eat the lsquare. 1246 if (ParseArrayVectorType(Result, false)) 1247 return true; 1248 break; 1249 case lltok::less: // Either vector or packed struct. 1250 // Type ::= '<' ... '>' 1251 Lex.Lex(); 1252 if (Lex.getKind() == lltok::lbrace) { 1253 if (ParseAnonStructType(Result, true) || 1254 ParseToken(lltok::greater, "expected '>' at end of packed struct")) 1255 return true; 1256 } else if (ParseArrayVectorType(Result, true)) 1257 return true; 1258 break; 1259 case lltok::LocalVar: { 1260 // Type ::= %foo 1261 std::pair<Type*, LocTy> &Entry = NamedTypes[Lex.getStrVal()]; 1262 1263 // If the type hasn't been defined yet, create a forward definition and 1264 // remember where that forward def'n was seen (in case it never is defined). 1265 if (Entry.first == 0) { 1266 Entry.first = StructType::createNamed(Context, Lex.getStrVal()); 1267 Entry.second = Lex.getLoc(); 1268 } 1269 Result = Entry.first; 1270 Lex.Lex(); 1271 break; 1272 } 1273 1274 case lltok::LocalVarID: { 1275 // Type ::= %4 1276 if (Lex.getUIntVal() >= NumberedTypes.size()) 1277 NumberedTypes.resize(Lex.getUIntVal()+1); 1278 std::pair<Type*, LocTy> &Entry = NumberedTypes[Lex.getUIntVal()]; 1279 1280 // If the type hasn't been defined yet, create a forward definition and 1281 // remember where that forward def'n was seen (in case it never is defined). 1282 if (Entry.first == 0) { 1283 Entry.first = StructType::createNamed(Context, ""); 1284 Entry.second = Lex.getLoc(); 1285 } 1286 Result = Entry.first; 1287 Lex.Lex(); 1288 break; 1289 } 1290 } 1291 1292 // Parse the type suffixes. 1293 while (1) { 1294 switch (Lex.getKind()) { 1295 // End of type. 1296 default: 1297 if (!AllowVoid && Result->isVoidTy()) 1298 return Error(TypeLoc, "void type only allowed for function results"); 1299 return false; 1300 1301 // Type ::= Type '*' 1302 case lltok::star: 1303 if (Result->isLabelTy()) 1304 return TokError("basic block pointers are invalid"); 1305 if (Result->isVoidTy()) 1306 return TokError("pointers to void are invalid - use i8* instead"); 1307 if (!PointerType::isValidElementType(Result)) 1308 return TokError("pointer to this type is invalid"); 1309 Result = PointerType::getUnqual(Result); 1310 Lex.Lex(); 1311 break; 1312 1313 // Type ::= Type 'addrspace' '(' uint32 ')' '*' 1314 case lltok::kw_addrspace: { 1315 if (Result->isLabelTy()) 1316 return TokError("basic block pointers are invalid"); 1317 if (Result->isVoidTy()) 1318 return TokError("pointers to void are invalid; use i8* instead"); 1319 if (!PointerType::isValidElementType(Result)) 1320 return TokError("pointer to this type is invalid"); 1321 unsigned AddrSpace; 1322 if (ParseOptionalAddrSpace(AddrSpace) || 1323 ParseToken(lltok::star, "expected '*' in address space")) 1324 return true; 1325 1326 Result = PointerType::get(Result, AddrSpace); 1327 break; 1328 } 1329 1330 /// Types '(' ArgTypeListI ')' OptFuncAttrs 1331 case lltok::lparen: 1332 if (ParseFunctionType(Result)) 1333 return true; 1334 break; 1335 } 1336 } 1337} 1338 1339/// ParseParameterList 1340/// ::= '(' ')' 1341/// ::= '(' Arg (',' Arg)* ')' 1342/// Arg 1343/// ::= Type OptionalAttributes Value OptionalAttributes 1344bool LLParser::ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList, 1345 PerFunctionState &PFS) { 1346 if (ParseToken(lltok::lparen, "expected '(' in call")) 1347 return true; 1348 1349 while (Lex.getKind() != lltok::rparen) { 1350 // If this isn't the first argument, we need a comma. 1351 if (!ArgList.empty() && 1352 ParseToken(lltok::comma, "expected ',' in argument list")) 1353 return true; 1354 1355 // Parse the argument. 1356 LocTy ArgLoc; 1357 Type *ArgTy = 0; 1358 unsigned ArgAttrs1 = Attribute::None; 1359 unsigned ArgAttrs2 = Attribute::None; 1360 Value *V; 1361 if (ParseType(ArgTy, ArgLoc)) 1362 return true; 1363 1364 // Otherwise, handle normal operands. 1365 if (ParseOptionalAttrs(ArgAttrs1, 0) || ParseValue(ArgTy, V, PFS)) 1366 return true; 1367 ArgList.push_back(ParamInfo(ArgLoc, V, ArgAttrs1|ArgAttrs2)); 1368 } 1369 1370 Lex.Lex(); // Lex the ')'. 1371 return false; 1372} 1373 1374 1375 1376/// ParseArgumentList - Parse the argument list for a function type or function 1377/// prototype. 1378/// ::= '(' ArgTypeListI ')' 1379/// ArgTypeListI 1380/// ::= /*empty*/ 1381/// ::= '...' 1382/// ::= ArgTypeList ',' '...' 1383/// ::= ArgType (',' ArgType)* 1384/// 1385bool LLParser::ParseArgumentList(SmallVectorImpl<ArgInfo> &ArgList, 1386 bool &isVarArg){ 1387 isVarArg = false; 1388 assert(Lex.getKind() == lltok::lparen); 1389 Lex.Lex(); // eat the (. 1390 1391 if (Lex.getKind() == lltok::rparen) { 1392 // empty 1393 } else if (Lex.getKind() == lltok::dotdotdot) { 1394 isVarArg = true; 1395 Lex.Lex(); 1396 } else { 1397 LocTy TypeLoc = Lex.getLoc(); 1398 Type *ArgTy = 0; 1399 unsigned Attrs; 1400 std::string Name; 1401 1402 if (ParseType(ArgTy) || 1403 ParseOptionalAttrs(Attrs, 0)) return true; 1404 1405 if (ArgTy->isVoidTy()) 1406 return Error(TypeLoc, "argument can not have void type"); 1407 1408 if (Lex.getKind() == lltok::LocalVar) { 1409 Name = Lex.getStrVal(); 1410 Lex.Lex(); 1411 } 1412 1413 if (!FunctionType::isValidArgumentType(ArgTy)) 1414 return Error(TypeLoc, "invalid type for function argument"); 1415 1416 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1417 1418 while (EatIfPresent(lltok::comma)) { 1419 // Handle ... at end of arg list. 1420 if (EatIfPresent(lltok::dotdotdot)) { 1421 isVarArg = true; 1422 break; 1423 } 1424 1425 // Otherwise must be an argument type. 1426 TypeLoc = Lex.getLoc(); 1427 if (ParseType(ArgTy) || ParseOptionalAttrs(Attrs, 0)) return true; 1428 1429 if (ArgTy->isVoidTy()) 1430 return Error(TypeLoc, "argument can not have void type"); 1431 1432 if (Lex.getKind() == lltok::LocalVar) { 1433 Name = Lex.getStrVal(); 1434 Lex.Lex(); 1435 } else { 1436 Name = ""; 1437 } 1438 1439 if (!ArgTy->isFirstClassType()) 1440 return Error(TypeLoc, "invalid type for function argument"); 1441 1442 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1443 } 1444 } 1445 1446 return ParseToken(lltok::rparen, "expected ')' at end of argument list"); 1447} 1448 1449/// ParseFunctionType 1450/// ::= Type ArgumentList OptionalAttrs 1451bool LLParser::ParseFunctionType(Type *&Result) { 1452 assert(Lex.getKind() == lltok::lparen); 1453 1454 if (!FunctionType::isValidReturnType(Result)) 1455 return TokError("invalid function return type"); 1456 1457 SmallVector<ArgInfo, 8> ArgList; 1458 bool isVarArg; 1459 if (ParseArgumentList(ArgList, isVarArg)) 1460 return true; 1461 1462 // Reject names on the arguments lists. 1463 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 1464 if (!ArgList[i].Name.empty()) 1465 return Error(ArgList[i].Loc, "argument name invalid in function type"); 1466 if (ArgList[i].Attrs != 0) 1467 return Error(ArgList[i].Loc, 1468 "argument attributes invalid in function type"); 1469 } 1470 1471 SmallVector<Type*, 16> ArgListTy; 1472 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 1473 ArgListTy.push_back(ArgList[i].Ty); 1474 1475 Result = FunctionType::get(Result, ArgListTy, isVarArg); 1476 return false; 1477} 1478 1479/// ParseAnonStructType - Parse an anonymous struct type, which is inlined into 1480/// other structs. 1481bool LLParser::ParseAnonStructType(Type *&Result, bool Packed) { 1482 SmallVector<Type*, 8> Elts; 1483 if (ParseStructBody(Elts)) return true; 1484 1485 Result = StructType::get(Context, Elts, Packed); 1486 return false; 1487} 1488 1489/// ParseStructDefinition - Parse a struct in a 'type' definition. 1490bool LLParser::ParseStructDefinition(SMLoc TypeLoc, StringRef Name, 1491 std::pair<Type*, LocTy> &Entry, 1492 Type *&ResultTy) { 1493 // If the type was already defined, diagnose the redefinition. 1494 if (Entry.first && !Entry.second.isValid()) 1495 return Error(TypeLoc, "redefinition of type"); 1496 1497 // If we have opaque, just return without filling in the definition for the 1498 // struct. This counts as a definition as far as the .ll file goes. 1499 if (EatIfPresent(lltok::kw_opaque)) { 1500 // This type is being defined, so clear the location to indicate this. 1501 Entry.second = SMLoc(); 1502 1503 // If this type number has never been uttered, create it. 1504 if (Entry.first == 0) 1505 Entry.first = StructType::createNamed(Context, Name); 1506 ResultTy = Entry.first; 1507 return false; 1508 } 1509 1510 // If the type starts with '<', then it is either a packed struct or a vector. 1511 bool isPacked = EatIfPresent(lltok::less); 1512 1513 // If we don't have a struct, then we have a random type alias, which we 1514 // accept for compatibility with old files. These types are not allowed to be 1515 // forward referenced and not allowed to be recursive. 1516 if (Lex.getKind() != lltok::lbrace) { 1517 if (Entry.first) 1518 return Error(TypeLoc, "forward references to non-struct type"); 1519 1520 ResultTy = 0; 1521 if (isPacked) 1522 return ParseArrayVectorType(ResultTy, true); 1523 return ParseType(ResultTy); 1524 } 1525 1526 // This type is being defined, so clear the location to indicate this. 1527 Entry.second = SMLoc(); 1528 1529 // If this type number has never been uttered, create it. 1530 if (Entry.first == 0) 1531 Entry.first = StructType::createNamed(Context, Name); 1532 1533 StructType *STy = cast<StructType>(Entry.first); 1534 1535 SmallVector<Type*, 8> Body; 1536 if (ParseStructBody(Body) || 1537 (isPacked && ParseToken(lltok::greater, "expected '>' in packed struct"))) 1538 return true; 1539 1540 STy->setBody(Body, isPacked); 1541 ResultTy = STy; 1542 return false; 1543} 1544 1545 1546/// ParseStructType: Handles packed and unpacked types. </> parsed elsewhere. 1547/// StructType 1548/// ::= '{' '}' 1549/// ::= '{' Type (',' Type)* '}' 1550/// ::= '<' '{' '}' '>' 1551/// ::= '<' '{' Type (',' Type)* '}' '>' 1552bool LLParser::ParseStructBody(SmallVectorImpl<Type*> &Body) { 1553 assert(Lex.getKind() == lltok::lbrace); 1554 Lex.Lex(); // Consume the '{' 1555 1556 // Handle the empty struct. 1557 if (EatIfPresent(lltok::rbrace)) 1558 return false; 1559 1560 LocTy EltTyLoc = Lex.getLoc(); 1561 Type *Ty = 0; 1562 if (ParseType(Ty)) return true; 1563 Body.push_back(Ty); 1564 1565 if (!StructType::isValidElementType(Ty)) 1566 return Error(EltTyLoc, "invalid element type for struct"); 1567 1568 while (EatIfPresent(lltok::comma)) { 1569 EltTyLoc = Lex.getLoc(); 1570 if (ParseType(Ty)) return true; 1571 1572 if (!StructType::isValidElementType(Ty)) 1573 return Error(EltTyLoc, "invalid element type for struct"); 1574 1575 Body.push_back(Ty); 1576 } 1577 1578 return ParseToken(lltok::rbrace, "expected '}' at end of struct"); 1579} 1580 1581/// ParseArrayVectorType - Parse an array or vector type, assuming the first 1582/// token has already been consumed. 1583/// Type 1584/// ::= '[' APSINTVAL 'x' Types ']' 1585/// ::= '<' APSINTVAL 'x' Types '>' 1586bool LLParser::ParseArrayVectorType(Type *&Result, bool isVector) { 1587 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned() || 1588 Lex.getAPSIntVal().getBitWidth() > 64) 1589 return TokError("expected number in address space"); 1590 1591 LocTy SizeLoc = Lex.getLoc(); 1592 uint64_t Size = Lex.getAPSIntVal().getZExtValue(); 1593 Lex.Lex(); 1594 1595 if (ParseToken(lltok::kw_x, "expected 'x' after element count")) 1596 return true; 1597 1598 LocTy TypeLoc = Lex.getLoc(); 1599 Type *EltTy = 0; 1600 if (ParseType(EltTy)) return true; 1601 1602 if (ParseToken(isVector ? lltok::greater : lltok::rsquare, 1603 "expected end of sequential type")) 1604 return true; 1605 1606 if (isVector) { 1607 if (Size == 0) 1608 return Error(SizeLoc, "zero element vector is illegal"); 1609 if ((unsigned)Size != Size) 1610 return Error(SizeLoc, "size too large for vector"); 1611 if (!VectorType::isValidElementType(EltTy)) 1612 return Error(TypeLoc, "vector element type must be fp or integer"); 1613 Result = VectorType::get(EltTy, unsigned(Size)); 1614 } else { 1615 if (!ArrayType::isValidElementType(EltTy)) 1616 return Error(TypeLoc, "invalid array element type"); 1617 Result = ArrayType::get(EltTy, Size); 1618 } 1619 return false; 1620} 1621 1622//===----------------------------------------------------------------------===// 1623// Function Semantic Analysis. 1624//===----------------------------------------------------------------------===// 1625 1626LLParser::PerFunctionState::PerFunctionState(LLParser &p, Function &f, 1627 int functionNumber) 1628 : P(p), F(f), FunctionNumber(functionNumber) { 1629 1630 // Insert unnamed arguments into the NumberedVals list. 1631 for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 1632 AI != E; ++AI) 1633 if (!AI->hasName()) 1634 NumberedVals.push_back(AI); 1635} 1636 1637LLParser::PerFunctionState::~PerFunctionState() { 1638 // If there were any forward referenced non-basicblock values, delete them. 1639 for (std::map<std::string, std::pair<Value*, LocTy> >::iterator 1640 I = ForwardRefVals.begin(), E = ForwardRefVals.end(); I != E; ++I) 1641 if (!isa<BasicBlock>(I->second.first)) { 1642 I->second.first->replaceAllUsesWith( 1643 UndefValue::get(I->second.first->getType())); 1644 delete I->second.first; 1645 I->second.first = 0; 1646 } 1647 1648 for (std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1649 I = ForwardRefValIDs.begin(), E = ForwardRefValIDs.end(); I != E; ++I) 1650 if (!isa<BasicBlock>(I->second.first)) { 1651 I->second.first->replaceAllUsesWith( 1652 UndefValue::get(I->second.first->getType())); 1653 delete I->second.first; 1654 I->second.first = 0; 1655 } 1656} 1657 1658bool LLParser::PerFunctionState::FinishFunction() { 1659 // Check to see if someone took the address of labels in this block. 1660 if (!P.ForwardRefBlockAddresses.empty()) { 1661 ValID FunctionID; 1662 if (!F.getName().empty()) { 1663 FunctionID.Kind = ValID::t_GlobalName; 1664 FunctionID.StrVal = F.getName(); 1665 } else { 1666 FunctionID.Kind = ValID::t_GlobalID; 1667 FunctionID.UIntVal = FunctionNumber; 1668 } 1669 1670 std::map<ValID, std::vector<std::pair<ValID, GlobalValue*> > >::iterator 1671 FRBAI = P.ForwardRefBlockAddresses.find(FunctionID); 1672 if (FRBAI != P.ForwardRefBlockAddresses.end()) { 1673 // Resolve all these references. 1674 if (P.ResolveForwardRefBlockAddresses(&F, FRBAI->second, this)) 1675 return true; 1676 1677 P.ForwardRefBlockAddresses.erase(FRBAI); 1678 } 1679 } 1680 1681 if (!ForwardRefVals.empty()) 1682 return P.Error(ForwardRefVals.begin()->second.second, 1683 "use of undefined value '%" + ForwardRefVals.begin()->first + 1684 "'"); 1685 if (!ForwardRefValIDs.empty()) 1686 return P.Error(ForwardRefValIDs.begin()->second.second, 1687 "use of undefined value '%" + 1688 Twine(ForwardRefValIDs.begin()->first) + "'"); 1689 return false; 1690} 1691 1692 1693/// GetVal - Get a value with the specified name or ID, creating a 1694/// forward reference record if needed. This can return null if the value 1695/// exists but does not have the right type. 1696Value *LLParser::PerFunctionState::GetVal(const std::string &Name, 1697 Type *Ty, LocTy Loc) { 1698 // Look this name up in the normal function symbol table. 1699 Value *Val = F.getValueSymbolTable().lookup(Name); 1700 1701 // If this is a forward reference for the value, see if we already created a 1702 // forward ref record. 1703 if (Val == 0) { 1704 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1705 I = ForwardRefVals.find(Name); 1706 if (I != ForwardRefVals.end()) 1707 Val = I->second.first; 1708 } 1709 1710 // If we have the value in the symbol table or fwd-ref table, return it. 1711 if (Val) { 1712 if (Val->getType() == Ty) return Val; 1713 if (Ty->isLabelTy()) 1714 P.Error(Loc, "'%" + Name + "' is not a basic block"); 1715 else 1716 P.Error(Loc, "'%" + Name + "' defined with type '" + 1717 getTypeString(Val->getType()) + "'"); 1718 return 0; 1719 } 1720 1721 // Don't make placeholders with invalid type. 1722 if (!Ty->isFirstClassType() && !Ty->isLabelTy()) { 1723 P.Error(Loc, "invalid use of a non-first-class type"); 1724 return 0; 1725 } 1726 1727 // Otherwise, create a new forward reference for this value and remember it. 1728 Value *FwdVal; 1729 if (Ty->isLabelTy()) 1730 FwdVal = BasicBlock::Create(F.getContext(), Name, &F); 1731 else 1732 FwdVal = new Argument(Ty, Name); 1733 1734 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 1735 return FwdVal; 1736} 1737 1738Value *LLParser::PerFunctionState::GetVal(unsigned ID, Type *Ty, 1739 LocTy Loc) { 1740 // Look this name up in the normal function symbol table. 1741 Value *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 1742 1743 // If this is a forward reference for the value, see if we already created a 1744 // forward ref record. 1745 if (Val == 0) { 1746 std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1747 I = ForwardRefValIDs.find(ID); 1748 if (I != ForwardRefValIDs.end()) 1749 Val = I->second.first; 1750 } 1751 1752 // If we have the value in the symbol table or fwd-ref table, return it. 1753 if (Val) { 1754 if (Val->getType() == Ty) return Val; 1755 if (Ty->isLabelTy()) 1756 P.Error(Loc, "'%" + Twine(ID) + "' is not a basic block"); 1757 else 1758 P.Error(Loc, "'%" + Twine(ID) + "' defined with type '" + 1759 getTypeString(Val->getType()) + "'"); 1760 return 0; 1761 } 1762 1763 if (!Ty->isFirstClassType() && !Ty->isLabelTy()) { 1764 P.Error(Loc, "invalid use of a non-first-class type"); 1765 return 0; 1766 } 1767 1768 // Otherwise, create a new forward reference for this value and remember it. 1769 Value *FwdVal; 1770 if (Ty->isLabelTy()) 1771 FwdVal = BasicBlock::Create(F.getContext(), "", &F); 1772 else 1773 FwdVal = new Argument(Ty); 1774 1775 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 1776 return FwdVal; 1777} 1778 1779/// SetInstName - After an instruction is parsed and inserted into its 1780/// basic block, this installs its name. 1781bool LLParser::PerFunctionState::SetInstName(int NameID, 1782 const std::string &NameStr, 1783 LocTy NameLoc, Instruction *Inst) { 1784 // If this instruction has void type, it cannot have a name or ID specified. 1785 if (Inst->getType()->isVoidTy()) { 1786 if (NameID != -1 || !NameStr.empty()) 1787 return P.Error(NameLoc, "instructions returning void cannot have a name"); 1788 return false; 1789 } 1790 1791 // If this was a numbered instruction, verify that the instruction is the 1792 // expected value and resolve any forward references. 1793 if (NameStr.empty()) { 1794 // If neither a name nor an ID was specified, just use the next ID. 1795 if (NameID == -1) 1796 NameID = NumberedVals.size(); 1797 1798 if (unsigned(NameID) != NumberedVals.size()) 1799 return P.Error(NameLoc, "instruction expected to be numbered '%" + 1800 Twine(NumberedVals.size()) + "'"); 1801 1802 std::map<unsigned, std::pair<Value*, LocTy> >::iterator FI = 1803 ForwardRefValIDs.find(NameID); 1804 if (FI != ForwardRefValIDs.end()) { 1805 if (FI->second.first->getType() != Inst->getType()) 1806 return P.Error(NameLoc, "instruction forward referenced with type '" + 1807 getTypeString(FI->second.first->getType()) + "'"); 1808 FI->second.first->replaceAllUsesWith(Inst); 1809 delete FI->second.first; 1810 ForwardRefValIDs.erase(FI); 1811 } 1812 1813 NumberedVals.push_back(Inst); 1814 return false; 1815 } 1816 1817 // Otherwise, the instruction had a name. Resolve forward refs and set it. 1818 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1819 FI = ForwardRefVals.find(NameStr); 1820 if (FI != ForwardRefVals.end()) { 1821 if (FI->second.first->getType() != Inst->getType()) 1822 return P.Error(NameLoc, "instruction forward referenced with type '" + 1823 getTypeString(FI->second.first->getType()) + "'"); 1824 FI->second.first->replaceAllUsesWith(Inst); 1825 delete FI->second.first; 1826 ForwardRefVals.erase(FI); 1827 } 1828 1829 // Set the name on the instruction. 1830 Inst->setName(NameStr); 1831 1832 if (Inst->getName() != NameStr) 1833 return P.Error(NameLoc, "multiple definition of local value named '" + 1834 NameStr + "'"); 1835 return false; 1836} 1837 1838/// GetBB - Get a basic block with the specified name or ID, creating a 1839/// forward reference record if needed. 1840BasicBlock *LLParser::PerFunctionState::GetBB(const std::string &Name, 1841 LocTy Loc) { 1842 return cast_or_null<BasicBlock>(GetVal(Name, 1843 Type::getLabelTy(F.getContext()), Loc)); 1844} 1845 1846BasicBlock *LLParser::PerFunctionState::GetBB(unsigned ID, LocTy Loc) { 1847 return cast_or_null<BasicBlock>(GetVal(ID, 1848 Type::getLabelTy(F.getContext()), Loc)); 1849} 1850 1851/// DefineBB - Define the specified basic block, which is either named or 1852/// unnamed. If there is an error, this returns null otherwise it returns 1853/// the block being defined. 1854BasicBlock *LLParser::PerFunctionState::DefineBB(const std::string &Name, 1855 LocTy Loc) { 1856 BasicBlock *BB; 1857 if (Name.empty()) 1858 BB = GetBB(NumberedVals.size(), Loc); 1859 else 1860 BB = GetBB(Name, Loc); 1861 if (BB == 0) return 0; // Already diagnosed error. 1862 1863 // Move the block to the end of the function. Forward ref'd blocks are 1864 // inserted wherever they happen to be referenced. 1865 F.getBasicBlockList().splice(F.end(), F.getBasicBlockList(), BB); 1866 1867 // Remove the block from forward ref sets. 1868 if (Name.empty()) { 1869 ForwardRefValIDs.erase(NumberedVals.size()); 1870 NumberedVals.push_back(BB); 1871 } else { 1872 // BB forward references are already in the function symbol table. 1873 ForwardRefVals.erase(Name); 1874 } 1875 1876 return BB; 1877} 1878 1879//===----------------------------------------------------------------------===// 1880// Constants. 1881//===----------------------------------------------------------------------===// 1882 1883/// ParseValID - Parse an abstract value that doesn't necessarily have a 1884/// type implied. For example, if we parse "4" we don't know what integer type 1885/// it has. The value will later be combined with its type and checked for 1886/// sanity. PFS is used to convert function-local operands of metadata (since 1887/// metadata operands are not just parsed here but also converted to values). 1888/// PFS can be null when we are not parsing metadata values inside a function. 1889bool LLParser::ParseValID(ValID &ID, PerFunctionState *PFS) { 1890 ID.Loc = Lex.getLoc(); 1891 switch (Lex.getKind()) { 1892 default: return TokError("expected value token"); 1893 case lltok::GlobalID: // @42 1894 ID.UIntVal = Lex.getUIntVal(); 1895 ID.Kind = ValID::t_GlobalID; 1896 break; 1897 case lltok::GlobalVar: // @foo 1898 ID.StrVal = Lex.getStrVal(); 1899 ID.Kind = ValID::t_GlobalName; 1900 break; 1901 case lltok::LocalVarID: // %42 1902 ID.UIntVal = Lex.getUIntVal(); 1903 ID.Kind = ValID::t_LocalID; 1904 break; 1905 case lltok::LocalVar: // %foo 1906 ID.StrVal = Lex.getStrVal(); 1907 ID.Kind = ValID::t_LocalName; 1908 break; 1909 case lltok::exclaim: // !42, !{...}, or !"foo" 1910 return ParseMetadataValue(ID, PFS); 1911 case lltok::APSInt: 1912 ID.APSIntVal = Lex.getAPSIntVal(); 1913 ID.Kind = ValID::t_APSInt; 1914 break; 1915 case lltok::APFloat: 1916 ID.APFloatVal = Lex.getAPFloatVal(); 1917 ID.Kind = ValID::t_APFloat; 1918 break; 1919 case lltok::kw_true: 1920 ID.ConstantVal = ConstantInt::getTrue(Context); 1921 ID.Kind = ValID::t_Constant; 1922 break; 1923 case lltok::kw_false: 1924 ID.ConstantVal = ConstantInt::getFalse(Context); 1925 ID.Kind = ValID::t_Constant; 1926 break; 1927 case lltok::kw_null: ID.Kind = ValID::t_Null; break; 1928 case lltok::kw_undef: ID.Kind = ValID::t_Undef; break; 1929 case lltok::kw_zeroinitializer: ID.Kind = ValID::t_Zero; break; 1930 1931 case lltok::lbrace: { 1932 // ValID ::= '{' ConstVector '}' 1933 Lex.Lex(); 1934 SmallVector<Constant*, 16> Elts; 1935 if (ParseGlobalValueVector(Elts) || 1936 ParseToken(lltok::rbrace, "expected end of struct constant")) 1937 return true; 1938 1939 ID.ConstantStructElts = new Constant*[Elts.size()]; 1940 ID.UIntVal = Elts.size(); 1941 memcpy(ID.ConstantStructElts, Elts.data(), Elts.size()*sizeof(Elts[0])); 1942 ID.Kind = ValID::t_ConstantStruct; 1943 return false; 1944 } 1945 case lltok::less: { 1946 // ValID ::= '<' ConstVector '>' --> Vector. 1947 // ValID ::= '<' '{' ConstVector '}' '>' --> Packed Struct. 1948 Lex.Lex(); 1949 bool isPackedStruct = EatIfPresent(lltok::lbrace); 1950 1951 SmallVector<Constant*, 16> Elts; 1952 LocTy FirstEltLoc = Lex.getLoc(); 1953 if (ParseGlobalValueVector(Elts) || 1954 (isPackedStruct && 1955 ParseToken(lltok::rbrace, "expected end of packed struct")) || 1956 ParseToken(lltok::greater, "expected end of constant")) 1957 return true; 1958 1959 if (isPackedStruct) { 1960 ID.ConstantStructElts = new Constant*[Elts.size()]; 1961 memcpy(ID.ConstantStructElts, Elts.data(), Elts.size()*sizeof(Elts[0])); 1962 ID.UIntVal = Elts.size(); 1963 ID.Kind = ValID::t_PackedConstantStruct; 1964 return false; 1965 } 1966 1967 if (Elts.empty()) 1968 return Error(ID.Loc, "constant vector must not be empty"); 1969 1970 if (!Elts[0]->getType()->isIntegerTy() && 1971 !Elts[0]->getType()->isFloatingPointTy()) 1972 return Error(FirstEltLoc, 1973 "vector elements must have integer or floating point type"); 1974 1975 // Verify that all the vector elements have the same type. 1976 for (unsigned i = 1, e = Elts.size(); i != e; ++i) 1977 if (Elts[i]->getType() != Elts[0]->getType()) 1978 return Error(FirstEltLoc, 1979 "vector element #" + Twine(i) + 1980 " is not of type '" + getTypeString(Elts[0]->getType())); 1981 1982 ID.ConstantVal = ConstantVector::get(Elts); 1983 ID.Kind = ValID::t_Constant; 1984 return false; 1985 } 1986 case lltok::lsquare: { // Array Constant 1987 Lex.Lex(); 1988 SmallVector<Constant*, 16> Elts; 1989 LocTy FirstEltLoc = Lex.getLoc(); 1990 if (ParseGlobalValueVector(Elts) || 1991 ParseToken(lltok::rsquare, "expected end of array constant")) 1992 return true; 1993 1994 // Handle empty element. 1995 if (Elts.empty()) { 1996 // Use undef instead of an array because it's inconvenient to determine 1997 // the element type at this point, there being no elements to examine. 1998 ID.Kind = ValID::t_EmptyArray; 1999 return false; 2000 } 2001 2002 if (!Elts[0]->getType()->isFirstClassType()) 2003 return Error(FirstEltLoc, "invalid array element type: " + 2004 getTypeString(Elts[0]->getType())); 2005 2006 ArrayType *ATy = ArrayType::get(Elts[0]->getType(), Elts.size()); 2007 2008 // Verify all elements are correct type! 2009 for (unsigned i = 0, e = Elts.size(); i != e; ++i) { 2010 if (Elts[i]->getType() != Elts[0]->getType()) 2011 return Error(FirstEltLoc, 2012 "array element #" + Twine(i) + 2013 " is not of type '" + getTypeString(Elts[0]->getType())); 2014 } 2015 2016 ID.ConstantVal = ConstantArray::get(ATy, Elts); 2017 ID.Kind = ValID::t_Constant; 2018 return false; 2019 } 2020 case lltok::kw_c: // c "foo" 2021 Lex.Lex(); 2022 ID.ConstantVal = ConstantArray::get(Context, Lex.getStrVal(), false); 2023 if (ParseToken(lltok::StringConstant, "expected string")) return true; 2024 ID.Kind = ValID::t_Constant; 2025 return false; 2026 2027 case lltok::kw_asm: { 2028 // ValID ::= 'asm' SideEffect? AlignStack? STRINGCONSTANT ',' STRINGCONSTANT 2029 bool HasSideEffect, AlignStack; 2030 Lex.Lex(); 2031 if (ParseOptionalToken(lltok::kw_sideeffect, HasSideEffect) || 2032 ParseOptionalToken(lltok::kw_alignstack, AlignStack) || 2033 ParseStringConstant(ID.StrVal) || 2034 ParseToken(lltok::comma, "expected comma in inline asm expression") || 2035 ParseToken(lltok::StringConstant, "expected constraint string")) 2036 return true; 2037 ID.StrVal2 = Lex.getStrVal(); 2038 ID.UIntVal = unsigned(HasSideEffect) | (unsigned(AlignStack)<<1); 2039 ID.Kind = ValID::t_InlineAsm; 2040 return false; 2041 } 2042 2043 case lltok::kw_blockaddress: { 2044 // ValID ::= 'blockaddress' '(' @foo ',' %bar ')' 2045 Lex.Lex(); 2046 2047 ValID Fn, Label; 2048 LocTy FnLoc, LabelLoc; 2049 2050 if (ParseToken(lltok::lparen, "expected '(' in block address expression") || 2051 ParseValID(Fn) || 2052 ParseToken(lltok::comma, "expected comma in block address expression")|| 2053 ParseValID(Label) || 2054 ParseToken(lltok::rparen, "expected ')' in block address expression")) 2055 return true; 2056 2057 if (Fn.Kind != ValID::t_GlobalID && Fn.Kind != ValID::t_GlobalName) 2058 return Error(Fn.Loc, "expected function name in blockaddress"); 2059 if (Label.Kind != ValID::t_LocalID && Label.Kind != ValID::t_LocalName) 2060 return Error(Label.Loc, "expected basic block name in blockaddress"); 2061 2062 // Make a global variable as a placeholder for this reference. 2063 GlobalVariable *FwdRef = new GlobalVariable(*M, Type::getInt8Ty(Context), 2064 false, GlobalValue::InternalLinkage, 2065 0, ""); 2066 ForwardRefBlockAddresses[Fn].push_back(std::make_pair(Label, FwdRef)); 2067 ID.ConstantVal = FwdRef; 2068 ID.Kind = ValID::t_Constant; 2069 return false; 2070 } 2071 2072 case lltok::kw_trunc: 2073 case lltok::kw_zext: 2074 case lltok::kw_sext: 2075 case lltok::kw_fptrunc: 2076 case lltok::kw_fpext: 2077 case lltok::kw_bitcast: 2078 case lltok::kw_uitofp: 2079 case lltok::kw_sitofp: 2080 case lltok::kw_fptoui: 2081 case lltok::kw_fptosi: 2082 case lltok::kw_inttoptr: 2083 case lltok::kw_ptrtoint: { 2084 unsigned Opc = Lex.getUIntVal(); 2085 Type *DestTy = 0; 2086 Constant *SrcVal; 2087 Lex.Lex(); 2088 if (ParseToken(lltok::lparen, "expected '(' after constantexpr cast") || 2089 ParseGlobalTypeAndValue(SrcVal) || 2090 ParseToken(lltok::kw_to, "expected 'to' in constantexpr cast") || 2091 ParseType(DestTy) || 2092 ParseToken(lltok::rparen, "expected ')' at end of constantexpr cast")) 2093 return true; 2094 if (!CastInst::castIsValid((Instruction::CastOps)Opc, SrcVal, DestTy)) 2095 return Error(ID.Loc, "invalid cast opcode for cast from '" + 2096 getTypeString(SrcVal->getType()) + "' to '" + 2097 getTypeString(DestTy) + "'"); 2098 ID.ConstantVal = ConstantExpr::getCast((Instruction::CastOps)Opc, 2099 SrcVal, DestTy); 2100 ID.Kind = ValID::t_Constant; 2101 return false; 2102 } 2103 case lltok::kw_extractvalue: { 2104 Lex.Lex(); 2105 Constant *Val; 2106 SmallVector<unsigned, 4> Indices; 2107 if (ParseToken(lltok::lparen, "expected '(' in extractvalue constantexpr")|| 2108 ParseGlobalTypeAndValue(Val) || 2109 ParseIndexList(Indices) || 2110 ParseToken(lltok::rparen, "expected ')' in extractvalue constantexpr")) 2111 return true; 2112 2113 if (!Val->getType()->isAggregateType()) 2114 return Error(ID.Loc, "extractvalue operand must be aggregate type"); 2115 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices)) 2116 return Error(ID.Loc, "invalid indices for extractvalue"); 2117 ID.ConstantVal = ConstantExpr::getExtractValue(Val, Indices); 2118 ID.Kind = ValID::t_Constant; 2119 return false; 2120 } 2121 case lltok::kw_insertvalue: { 2122 Lex.Lex(); 2123 Constant *Val0, *Val1; 2124 SmallVector<unsigned, 4> Indices; 2125 if (ParseToken(lltok::lparen, "expected '(' in insertvalue constantexpr")|| 2126 ParseGlobalTypeAndValue(Val0) || 2127 ParseToken(lltok::comma, "expected comma in insertvalue constantexpr")|| 2128 ParseGlobalTypeAndValue(Val1) || 2129 ParseIndexList(Indices) || 2130 ParseToken(lltok::rparen, "expected ')' in insertvalue constantexpr")) 2131 return true; 2132 if (!Val0->getType()->isAggregateType()) 2133 return Error(ID.Loc, "insertvalue operand must be aggregate type"); 2134 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices)) 2135 return Error(ID.Loc, "invalid indices for insertvalue"); 2136 ID.ConstantVal = ConstantExpr::getInsertValue(Val0, Val1, Indices); 2137 ID.Kind = ValID::t_Constant; 2138 return false; 2139 } 2140 case lltok::kw_icmp: 2141 case lltok::kw_fcmp: { 2142 unsigned PredVal, Opc = Lex.getUIntVal(); 2143 Constant *Val0, *Val1; 2144 Lex.Lex(); 2145 if (ParseCmpPredicate(PredVal, Opc) || 2146 ParseToken(lltok::lparen, "expected '(' in compare constantexpr") || 2147 ParseGlobalTypeAndValue(Val0) || 2148 ParseToken(lltok::comma, "expected comma in compare constantexpr") || 2149 ParseGlobalTypeAndValue(Val1) || 2150 ParseToken(lltok::rparen, "expected ')' in compare constantexpr")) 2151 return true; 2152 2153 if (Val0->getType() != Val1->getType()) 2154 return Error(ID.Loc, "compare operands must have the same type"); 2155 2156 CmpInst::Predicate Pred = (CmpInst::Predicate)PredVal; 2157 2158 if (Opc == Instruction::FCmp) { 2159 if (!Val0->getType()->isFPOrFPVectorTy()) 2160 return Error(ID.Loc, "fcmp requires floating point operands"); 2161 ID.ConstantVal = ConstantExpr::getFCmp(Pred, Val0, Val1); 2162 } else { 2163 assert(Opc == Instruction::ICmp && "Unexpected opcode for CmpInst!"); 2164 if (!Val0->getType()->isIntOrIntVectorTy() && 2165 !Val0->getType()->isPointerTy()) 2166 return Error(ID.Loc, "icmp requires pointer or integer operands"); 2167 ID.ConstantVal = ConstantExpr::getICmp(Pred, Val0, Val1); 2168 } 2169 ID.Kind = ValID::t_Constant; 2170 return false; 2171 } 2172 2173 // Binary Operators. 2174 case lltok::kw_add: 2175 case lltok::kw_fadd: 2176 case lltok::kw_sub: 2177 case lltok::kw_fsub: 2178 case lltok::kw_mul: 2179 case lltok::kw_fmul: 2180 case lltok::kw_udiv: 2181 case lltok::kw_sdiv: 2182 case lltok::kw_fdiv: 2183 case lltok::kw_urem: 2184 case lltok::kw_srem: 2185 case lltok::kw_frem: 2186 case lltok::kw_shl: 2187 case lltok::kw_lshr: 2188 case lltok::kw_ashr: { 2189 bool NUW = false; 2190 bool NSW = false; 2191 bool Exact = false; 2192 unsigned Opc = Lex.getUIntVal(); 2193 Constant *Val0, *Val1; 2194 Lex.Lex(); 2195 LocTy ModifierLoc = Lex.getLoc(); 2196 if (Opc == Instruction::Add || Opc == Instruction::Sub || 2197 Opc == Instruction::Mul || Opc == Instruction::Shl) { 2198 if (EatIfPresent(lltok::kw_nuw)) 2199 NUW = true; 2200 if (EatIfPresent(lltok::kw_nsw)) { 2201 NSW = true; 2202 if (EatIfPresent(lltok::kw_nuw)) 2203 NUW = true; 2204 } 2205 } else if (Opc == Instruction::SDiv || Opc == Instruction::UDiv || 2206 Opc == Instruction::LShr || Opc == Instruction::AShr) { 2207 if (EatIfPresent(lltok::kw_exact)) 2208 Exact = true; 2209 } 2210 if (ParseToken(lltok::lparen, "expected '(' in binary constantexpr") || 2211 ParseGlobalTypeAndValue(Val0) || 2212 ParseToken(lltok::comma, "expected comma in binary constantexpr") || 2213 ParseGlobalTypeAndValue(Val1) || 2214 ParseToken(lltok::rparen, "expected ')' in binary constantexpr")) 2215 return true; 2216 if (Val0->getType() != Val1->getType()) 2217 return Error(ID.Loc, "operands of constexpr must have same type"); 2218 if (!Val0->getType()->isIntOrIntVectorTy()) { 2219 if (NUW) 2220 return Error(ModifierLoc, "nuw only applies to integer operations"); 2221 if (NSW) 2222 return Error(ModifierLoc, "nsw only applies to integer operations"); 2223 } 2224 // Check that the type is valid for the operator. 2225 switch (Opc) { 2226 case Instruction::Add: 2227 case Instruction::Sub: 2228 case Instruction::Mul: 2229 case Instruction::UDiv: 2230 case Instruction::SDiv: 2231 case Instruction::URem: 2232 case Instruction::SRem: 2233 case Instruction::Shl: 2234 case Instruction::AShr: 2235 case Instruction::LShr: 2236 if (!Val0->getType()->isIntOrIntVectorTy()) 2237 return Error(ID.Loc, "constexpr requires integer operands"); 2238 break; 2239 case Instruction::FAdd: 2240 case Instruction::FSub: 2241 case Instruction::FMul: 2242 case Instruction::FDiv: 2243 case Instruction::FRem: 2244 if (!Val0->getType()->isFPOrFPVectorTy()) 2245 return Error(ID.Loc, "constexpr requires fp operands"); 2246 break; 2247 default: llvm_unreachable("Unknown binary operator!"); 2248 } 2249 unsigned Flags = 0; 2250 if (NUW) Flags |= OverflowingBinaryOperator::NoUnsignedWrap; 2251 if (NSW) Flags |= OverflowingBinaryOperator::NoSignedWrap; 2252 if (Exact) Flags |= PossiblyExactOperator::IsExact; 2253 Constant *C = ConstantExpr::get(Opc, Val0, Val1, Flags); 2254 ID.ConstantVal = C; 2255 ID.Kind = ValID::t_Constant; 2256 return false; 2257 } 2258 2259 // Logical Operations 2260 case lltok::kw_and: 2261 case lltok::kw_or: 2262 case lltok::kw_xor: { 2263 unsigned Opc = Lex.getUIntVal(); 2264 Constant *Val0, *Val1; 2265 Lex.Lex(); 2266 if (ParseToken(lltok::lparen, "expected '(' in logical constantexpr") || 2267 ParseGlobalTypeAndValue(Val0) || 2268 ParseToken(lltok::comma, "expected comma in logical constantexpr") || 2269 ParseGlobalTypeAndValue(Val1) || 2270 ParseToken(lltok::rparen, "expected ')' in logical constantexpr")) 2271 return true; 2272 if (Val0->getType() != Val1->getType()) 2273 return Error(ID.Loc, "operands of constexpr must have same type"); 2274 if (!Val0->getType()->isIntOrIntVectorTy()) 2275 return Error(ID.Loc, 2276 "constexpr requires integer or integer vector operands"); 2277 ID.ConstantVal = ConstantExpr::get(Opc, Val0, Val1); 2278 ID.Kind = ValID::t_Constant; 2279 return false; 2280 } 2281 2282 case lltok::kw_getelementptr: 2283 case lltok::kw_shufflevector: 2284 case lltok::kw_insertelement: 2285 case lltok::kw_extractelement: 2286 case lltok::kw_select: { 2287 unsigned Opc = Lex.getUIntVal(); 2288 SmallVector<Constant*, 16> Elts; 2289 bool InBounds = false; 2290 Lex.Lex(); 2291 if (Opc == Instruction::GetElementPtr) 2292 InBounds = EatIfPresent(lltok::kw_inbounds); 2293 if (ParseToken(lltok::lparen, "expected '(' in constantexpr") || 2294 ParseGlobalValueVector(Elts) || 2295 ParseToken(lltok::rparen, "expected ')' in constantexpr")) 2296 return true; 2297 2298 if (Opc == Instruction::GetElementPtr) { 2299 if (Elts.size() == 0 || !Elts[0]->getType()->isPointerTy()) 2300 return Error(ID.Loc, "getelementptr requires pointer operand"); 2301 2302 ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end()); 2303 if (!GetElementPtrInst::getIndexedType(Elts[0]->getType(), Indices)) 2304 return Error(ID.Loc, "invalid indices for getelementptr"); 2305 ID.ConstantVal = ConstantExpr::getGetElementPtr(Elts[0], Indices, 2306 InBounds); 2307 } else if (Opc == Instruction::Select) { 2308 if (Elts.size() != 3) 2309 return Error(ID.Loc, "expected three operands to select"); 2310 if (const char *Reason = SelectInst::areInvalidOperands(Elts[0], Elts[1], 2311 Elts[2])) 2312 return Error(ID.Loc, Reason); 2313 ID.ConstantVal = ConstantExpr::getSelect(Elts[0], Elts[1], Elts[2]); 2314 } else if (Opc == Instruction::ShuffleVector) { 2315 if (Elts.size() != 3) 2316 return Error(ID.Loc, "expected three operands to shufflevector"); 2317 if (!ShuffleVectorInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2318 return Error(ID.Loc, "invalid operands to shufflevector"); 2319 ID.ConstantVal = 2320 ConstantExpr::getShuffleVector(Elts[0], Elts[1],Elts[2]); 2321 } else if (Opc == Instruction::ExtractElement) { 2322 if (Elts.size() != 2) 2323 return Error(ID.Loc, "expected two operands to extractelement"); 2324 if (!ExtractElementInst::isValidOperands(Elts[0], Elts[1])) 2325 return Error(ID.Loc, "invalid extractelement operands"); 2326 ID.ConstantVal = ConstantExpr::getExtractElement(Elts[0], Elts[1]); 2327 } else { 2328 assert(Opc == Instruction::InsertElement && "Unknown opcode"); 2329 if (Elts.size() != 3) 2330 return Error(ID.Loc, "expected three operands to insertelement"); 2331 if (!InsertElementInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2332 return Error(ID.Loc, "invalid insertelement operands"); 2333 ID.ConstantVal = 2334 ConstantExpr::getInsertElement(Elts[0], Elts[1],Elts[2]); 2335 } 2336 2337 ID.Kind = ValID::t_Constant; 2338 return false; 2339 } 2340 } 2341 2342 Lex.Lex(); 2343 return false; 2344} 2345 2346/// ParseGlobalValue - Parse a global value with the specified type. 2347bool LLParser::ParseGlobalValue(Type *Ty, Constant *&C) { 2348 C = 0; 2349 ValID ID; 2350 Value *V = NULL; 2351 bool Parsed = ParseValID(ID) || 2352 ConvertValIDToValue(Ty, ID, V, NULL); 2353 if (V && !(C = dyn_cast<Constant>(V))) 2354 return Error(ID.Loc, "global values must be constants"); 2355 return Parsed; 2356} 2357 2358bool LLParser::ParseGlobalTypeAndValue(Constant *&V) { 2359 Type *Ty = 0; 2360 return ParseType(Ty) || 2361 ParseGlobalValue(Ty, V); 2362} 2363 2364/// ParseGlobalValueVector 2365/// ::= /*empty*/ 2366/// ::= TypeAndValue (',' TypeAndValue)* 2367bool LLParser::ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts) { 2368 // Empty list. 2369 if (Lex.getKind() == lltok::rbrace || 2370 Lex.getKind() == lltok::rsquare || 2371 Lex.getKind() == lltok::greater || 2372 Lex.getKind() == lltok::rparen) 2373 return false; 2374 2375 Constant *C; 2376 if (ParseGlobalTypeAndValue(C)) return true; 2377 Elts.push_back(C); 2378 2379 while (EatIfPresent(lltok::comma)) { 2380 if (ParseGlobalTypeAndValue(C)) return true; 2381 Elts.push_back(C); 2382 } 2383 2384 return false; 2385} 2386 2387bool LLParser::ParseMetadataListValue(ValID &ID, PerFunctionState *PFS) { 2388 assert(Lex.getKind() == lltok::lbrace); 2389 Lex.Lex(); 2390 2391 SmallVector<Value*, 16> Elts; 2392 if (ParseMDNodeVector(Elts, PFS) || 2393 ParseToken(lltok::rbrace, "expected end of metadata node")) 2394 return true; 2395 2396 ID.MDNodeVal = MDNode::get(Context, Elts); 2397 ID.Kind = ValID::t_MDNode; 2398 return false; 2399} 2400 2401/// ParseMetadataValue 2402/// ::= !42 2403/// ::= !{...} 2404/// ::= !"string" 2405bool LLParser::ParseMetadataValue(ValID &ID, PerFunctionState *PFS) { 2406 assert(Lex.getKind() == lltok::exclaim); 2407 Lex.Lex(); 2408 2409 // MDNode: 2410 // !{ ... } 2411 if (Lex.getKind() == lltok::lbrace) 2412 return ParseMetadataListValue(ID, PFS); 2413 2414 // Standalone metadata reference 2415 // !42 2416 if (Lex.getKind() == lltok::APSInt) { 2417 if (ParseMDNodeID(ID.MDNodeVal)) return true; 2418 ID.Kind = ValID::t_MDNode; 2419 return false; 2420 } 2421 2422 // MDString: 2423 // ::= '!' STRINGCONSTANT 2424 if (ParseMDString(ID.MDStringVal)) return true; 2425 ID.Kind = ValID::t_MDString; 2426 return false; 2427} 2428 2429 2430//===----------------------------------------------------------------------===// 2431// Function Parsing. 2432//===----------------------------------------------------------------------===// 2433 2434bool LLParser::ConvertValIDToValue(Type *Ty, ValID &ID, Value *&V, 2435 PerFunctionState *PFS) { 2436 if (Ty->isFunctionTy()) 2437 return Error(ID.Loc, "functions are not values, refer to them as pointers"); 2438 2439 switch (ID.Kind) { 2440 default: llvm_unreachable("Unknown ValID!"); 2441 case ValID::t_LocalID: 2442 if (!PFS) return Error(ID.Loc, "invalid use of function-local name"); 2443 V = PFS->GetVal(ID.UIntVal, Ty, ID.Loc); 2444 return (V == 0); 2445 case ValID::t_LocalName: 2446 if (!PFS) return Error(ID.Loc, "invalid use of function-local name"); 2447 V = PFS->GetVal(ID.StrVal, Ty, ID.Loc); 2448 return (V == 0); 2449 case ValID::t_InlineAsm: { 2450 PointerType *PTy = dyn_cast<PointerType>(Ty); 2451 FunctionType *FTy = 2452 PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : 0; 2453 if (!FTy || !InlineAsm::Verify(FTy, ID.StrVal2)) 2454 return Error(ID.Loc, "invalid type for inline asm constraint string"); 2455 V = InlineAsm::get(FTy, ID.StrVal, ID.StrVal2, ID.UIntVal&1, ID.UIntVal>>1); 2456 return false; 2457 } 2458 case ValID::t_MDNode: 2459 if (!Ty->isMetadataTy()) 2460 return Error(ID.Loc, "metadata value must have metadata type"); 2461 V = ID.MDNodeVal; 2462 return false; 2463 case ValID::t_MDString: 2464 if (!Ty->isMetadataTy()) 2465 return Error(ID.Loc, "metadata value must have metadata type"); 2466 V = ID.MDStringVal; 2467 return false; 2468 case ValID::t_GlobalName: 2469 V = GetGlobalVal(ID.StrVal, Ty, ID.Loc); 2470 return V == 0; 2471 case ValID::t_GlobalID: 2472 V = GetGlobalVal(ID.UIntVal, Ty, ID.Loc); 2473 return V == 0; 2474 case ValID::t_APSInt: 2475 if (!Ty->isIntegerTy()) 2476 return Error(ID.Loc, "integer constant must have integer type"); 2477 ID.APSIntVal = ID.APSIntVal.extOrTrunc(Ty->getPrimitiveSizeInBits()); 2478 V = ConstantInt::get(Context, ID.APSIntVal); 2479 return false; 2480 case ValID::t_APFloat: 2481 if (!Ty->isFloatingPointTy() || 2482 !ConstantFP::isValueValidForType(Ty, ID.APFloatVal)) 2483 return Error(ID.Loc, "floating point constant invalid for type"); 2484 2485 // The lexer has no type info, so builds all float and double FP constants 2486 // as double. Fix this here. Long double does not need this. 2487 if (&ID.APFloatVal.getSemantics() == &APFloat::IEEEdouble && 2488 Ty->isFloatTy()) { 2489 bool Ignored; 2490 ID.APFloatVal.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, 2491 &Ignored); 2492 } 2493 V = ConstantFP::get(Context, ID.APFloatVal); 2494 2495 if (V->getType() != Ty) 2496 return Error(ID.Loc, "floating point constant does not have type '" + 2497 getTypeString(Ty) + "'"); 2498 2499 return false; 2500 case ValID::t_Null: 2501 if (!Ty->isPointerTy()) 2502 return Error(ID.Loc, "null must be a pointer type"); 2503 V = ConstantPointerNull::get(cast<PointerType>(Ty)); 2504 return false; 2505 case ValID::t_Undef: 2506 // FIXME: LabelTy should not be a first-class type. 2507 if (!Ty->isFirstClassType() || Ty->isLabelTy()) 2508 return Error(ID.Loc, "invalid type for undef constant"); 2509 V = UndefValue::get(Ty); 2510 return false; 2511 case ValID::t_EmptyArray: 2512 if (!Ty->isArrayTy() || cast<ArrayType>(Ty)->getNumElements() != 0) 2513 return Error(ID.Loc, "invalid empty array initializer"); 2514 V = UndefValue::get(Ty); 2515 return false; 2516 case ValID::t_Zero: 2517 // FIXME: LabelTy should not be a first-class type. 2518 if (!Ty->isFirstClassType() || Ty->isLabelTy()) 2519 return Error(ID.Loc, "invalid type for null constant"); 2520 V = Constant::getNullValue(Ty); 2521 return false; 2522 case ValID::t_Constant: 2523 if (ID.ConstantVal->getType() != Ty) 2524 return Error(ID.Loc, "constant expression type mismatch"); 2525 2526 V = ID.ConstantVal; 2527 return false; 2528 case ValID::t_ConstantStruct: 2529 case ValID::t_PackedConstantStruct: 2530 if (StructType *ST = dyn_cast<StructType>(Ty)) { 2531 if (ST->getNumElements() != ID.UIntVal) 2532 return Error(ID.Loc, 2533 "initializer with struct type has wrong # elements"); 2534 if (ST->isPacked() != (ID.Kind == ValID::t_PackedConstantStruct)) 2535 return Error(ID.Loc, "packed'ness of initializer and type don't match"); 2536 2537 // Verify that the elements are compatible with the structtype. 2538 for (unsigned i = 0, e = ID.UIntVal; i != e; ++i) 2539 if (ID.ConstantStructElts[i]->getType() != ST->getElementType(i)) 2540 return Error(ID.Loc, "element " + Twine(i) + 2541 " of struct initializer doesn't match struct element type"); 2542 2543 V = ConstantStruct::get(ST, makeArrayRef(ID.ConstantStructElts, 2544 ID.UIntVal)); 2545 } else 2546 return Error(ID.Loc, "constant expression type mismatch"); 2547 return false; 2548 } 2549} 2550 2551bool LLParser::ParseValue(Type *Ty, Value *&V, PerFunctionState *PFS) { 2552 V = 0; 2553 ValID ID; 2554 return ParseValID(ID, PFS) || 2555 ConvertValIDToValue(Ty, ID, V, PFS); 2556} 2557 2558bool LLParser::ParseTypeAndValue(Value *&V, PerFunctionState *PFS) { 2559 Type *Ty = 0; 2560 return ParseType(Ty) || 2561 ParseValue(Ty, V, PFS); 2562} 2563 2564bool LLParser::ParseTypeAndBasicBlock(BasicBlock *&BB, LocTy &Loc, 2565 PerFunctionState &PFS) { 2566 Value *V; 2567 Loc = Lex.getLoc(); 2568 if (ParseTypeAndValue(V, PFS)) return true; 2569 if (!isa<BasicBlock>(V)) 2570 return Error(Loc, "expected a basic block"); 2571 BB = cast<BasicBlock>(V); 2572 return false; 2573} 2574 2575 2576/// FunctionHeader 2577/// ::= OptionalLinkage OptionalVisibility OptionalCallingConv OptRetAttrs 2578/// OptUnnamedAddr Type GlobalName '(' ArgList ')' OptFuncAttrs OptSection 2579/// OptionalAlign OptGC 2580bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) { 2581 // Parse the linkage. 2582 LocTy LinkageLoc = Lex.getLoc(); 2583 unsigned Linkage; 2584 2585 unsigned Visibility, RetAttrs; 2586 CallingConv::ID CC; 2587 Type *RetType = 0; 2588 LocTy RetTypeLoc = Lex.getLoc(); 2589 if (ParseOptionalLinkage(Linkage) || 2590 ParseOptionalVisibility(Visibility) || 2591 ParseOptionalCallingConv(CC) || 2592 ParseOptionalAttrs(RetAttrs, 1) || 2593 ParseType(RetType, RetTypeLoc, true /*void allowed*/)) 2594 return true; 2595 2596 // Verify that the linkage is ok. 2597 switch ((GlobalValue::LinkageTypes)Linkage) { 2598 case GlobalValue::ExternalLinkage: 2599 break; // always ok. 2600 case GlobalValue::DLLImportLinkage: 2601 case GlobalValue::ExternalWeakLinkage: 2602 if (isDefine) 2603 return Error(LinkageLoc, "invalid linkage for function definition"); 2604 break; 2605 case GlobalValue::PrivateLinkage: 2606 case GlobalValue::LinkerPrivateLinkage: 2607 case GlobalValue::LinkerPrivateWeakLinkage: 2608 case GlobalValue::LinkerPrivateWeakDefAutoLinkage: 2609 case GlobalValue::InternalLinkage: 2610 case GlobalValue::AvailableExternallyLinkage: 2611 case GlobalValue::LinkOnceAnyLinkage: 2612 case GlobalValue::LinkOnceODRLinkage: 2613 case GlobalValue::WeakAnyLinkage: 2614 case GlobalValue::WeakODRLinkage: 2615 case GlobalValue::DLLExportLinkage: 2616 if (!isDefine) 2617 return Error(LinkageLoc, "invalid linkage for function declaration"); 2618 break; 2619 case GlobalValue::AppendingLinkage: 2620 case GlobalValue::CommonLinkage: 2621 return Error(LinkageLoc, "invalid function linkage type"); 2622 } 2623 2624 if (!FunctionType::isValidReturnType(RetType)) 2625 return Error(RetTypeLoc, "invalid function return type"); 2626 2627 LocTy NameLoc = Lex.getLoc(); 2628 2629 std::string FunctionName; 2630 if (Lex.getKind() == lltok::GlobalVar) { 2631 FunctionName = Lex.getStrVal(); 2632 } else if (Lex.getKind() == lltok::GlobalID) { // @42 is ok. 2633 unsigned NameID = Lex.getUIntVal(); 2634 2635 if (NameID != NumberedVals.size()) 2636 return TokError("function expected to be numbered '%" + 2637 Twine(NumberedVals.size()) + "'"); 2638 } else { 2639 return TokError("expected function name"); 2640 } 2641 2642 Lex.Lex(); 2643 2644 if (Lex.getKind() != lltok::lparen) 2645 return TokError("expected '(' in function argument list"); 2646 2647 SmallVector<ArgInfo, 8> ArgList; 2648 bool isVarArg; 2649 unsigned FuncAttrs; 2650 std::string Section; 2651 unsigned Alignment; 2652 std::string GC; 2653 bool UnnamedAddr; 2654 LocTy UnnamedAddrLoc; 2655 2656 if (ParseArgumentList(ArgList, isVarArg) || 2657 ParseOptionalToken(lltok::kw_unnamed_addr, UnnamedAddr, 2658 &UnnamedAddrLoc) || 2659 ParseOptionalAttrs(FuncAttrs, 2) || 2660 (EatIfPresent(lltok::kw_section) && 2661 ParseStringConstant(Section)) || 2662 ParseOptionalAlignment(Alignment) || 2663 (EatIfPresent(lltok::kw_gc) && 2664 ParseStringConstant(GC))) 2665 return true; 2666 2667 // If the alignment was parsed as an attribute, move to the alignment field. 2668 if (FuncAttrs & Attribute::Alignment) { 2669 Alignment = Attribute::getAlignmentFromAttrs(FuncAttrs); 2670 FuncAttrs &= ~Attribute::Alignment; 2671 } 2672 2673 // Okay, if we got here, the function is syntactically valid. Convert types 2674 // and do semantic checks. 2675 std::vector<Type*> ParamTypeList; 2676 SmallVector<AttributeWithIndex, 8> Attrs; 2677 2678 if (RetAttrs != Attribute::None) 2679 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 2680 2681 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 2682 ParamTypeList.push_back(ArgList[i].Ty); 2683 if (ArgList[i].Attrs != Attribute::None) 2684 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 2685 } 2686 2687 if (FuncAttrs != Attribute::None) 2688 Attrs.push_back(AttributeWithIndex::get(~0, FuncAttrs)); 2689 2690 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 2691 2692 if (PAL.paramHasAttr(1, Attribute::StructRet) && !RetType->isVoidTy()) 2693 return Error(RetTypeLoc, "functions with 'sret' argument must return void"); 2694 2695 FunctionType *FT = 2696 FunctionType::get(RetType, ParamTypeList, isVarArg); 2697 PointerType *PFT = PointerType::getUnqual(FT); 2698 2699 Fn = 0; 2700 if (!FunctionName.empty()) { 2701 // If this was a definition of a forward reference, remove the definition 2702 // from the forward reference table and fill in the forward ref. 2703 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator FRVI = 2704 ForwardRefVals.find(FunctionName); 2705 if (FRVI != ForwardRefVals.end()) { 2706 Fn = M->getFunction(FunctionName); 2707 if (Fn->getType() != PFT) 2708 return Error(FRVI->second.second, "invalid forward reference to " 2709 "function '" + FunctionName + "' with wrong type!"); 2710 2711 ForwardRefVals.erase(FRVI); 2712 } else if ((Fn = M->getFunction(FunctionName))) { 2713 // Reject redefinitions. 2714 return Error(NameLoc, "invalid redefinition of function '" + 2715 FunctionName + "'"); 2716 } else if (M->getNamedValue(FunctionName)) { 2717 return Error(NameLoc, "redefinition of function '@" + FunctionName + "'"); 2718 } 2719 2720 } else { 2721 // If this is a definition of a forward referenced function, make sure the 2722 // types agree. 2723 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator I 2724 = ForwardRefValIDs.find(NumberedVals.size()); 2725 if (I != ForwardRefValIDs.end()) { 2726 Fn = cast<Function>(I->second.first); 2727 if (Fn->getType() != PFT) 2728 return Error(NameLoc, "type of definition and forward reference of '@" + 2729 Twine(NumberedVals.size()) + "' disagree"); 2730 ForwardRefValIDs.erase(I); 2731 } 2732 } 2733 2734 if (Fn == 0) 2735 Fn = Function::Create(FT, GlobalValue::ExternalLinkage, FunctionName, M); 2736 else // Move the forward-reference to the correct spot in the module. 2737 M->getFunctionList().splice(M->end(), M->getFunctionList(), Fn); 2738 2739 if (FunctionName.empty()) 2740 NumberedVals.push_back(Fn); 2741 2742 Fn->setLinkage((GlobalValue::LinkageTypes)Linkage); 2743 Fn->setVisibility((GlobalValue::VisibilityTypes)Visibility); 2744 Fn->setCallingConv(CC); 2745 Fn->setAttributes(PAL); 2746 Fn->setUnnamedAddr(UnnamedAddr); 2747 Fn->setAlignment(Alignment); 2748 Fn->setSection(Section); 2749 if (!GC.empty()) Fn->setGC(GC.c_str()); 2750 2751 // Add all of the arguments we parsed to the function. 2752 Function::arg_iterator ArgIt = Fn->arg_begin(); 2753 for (unsigned i = 0, e = ArgList.size(); i != e; ++i, ++ArgIt) { 2754 // If the argument has a name, insert it into the argument symbol table. 2755 if (ArgList[i].Name.empty()) continue; 2756 2757 // Set the name, if it conflicted, it will be auto-renamed. 2758 ArgIt->setName(ArgList[i].Name); 2759 2760 if (ArgIt->getName() != ArgList[i].Name) 2761 return Error(ArgList[i].Loc, "redefinition of argument '%" + 2762 ArgList[i].Name + "'"); 2763 } 2764 2765 return false; 2766} 2767 2768 2769/// ParseFunctionBody 2770/// ::= '{' BasicBlock+ '}' 2771/// 2772bool LLParser::ParseFunctionBody(Function &Fn) { 2773 if (Lex.getKind() != lltok::lbrace) 2774 return TokError("expected '{' in function body"); 2775 Lex.Lex(); // eat the {. 2776 2777 int FunctionNumber = -1; 2778 if (!Fn.hasName()) FunctionNumber = NumberedVals.size()-1; 2779 2780 PerFunctionState PFS(*this, Fn, FunctionNumber); 2781 2782 // We need at least one basic block. 2783 if (Lex.getKind() == lltok::rbrace) 2784 return TokError("function body requires at least one basic block"); 2785 2786 while (Lex.getKind() != lltok::rbrace) 2787 if (ParseBasicBlock(PFS)) return true; 2788 2789 // Eat the }. 2790 Lex.Lex(); 2791 2792 // Verify function is ok. 2793 return PFS.FinishFunction(); 2794} 2795 2796/// ParseBasicBlock 2797/// ::= LabelStr? Instruction* 2798bool LLParser::ParseBasicBlock(PerFunctionState &PFS) { 2799 // If this basic block starts out with a name, remember it. 2800 std::string Name; 2801 LocTy NameLoc = Lex.getLoc(); 2802 if (Lex.getKind() == lltok::LabelStr) { 2803 Name = Lex.getStrVal(); 2804 Lex.Lex(); 2805 } 2806 2807 BasicBlock *BB = PFS.DefineBB(Name, NameLoc); 2808 if (BB == 0) return true; 2809 2810 std::string NameStr; 2811 2812 // Parse the instructions in this block until we get a terminator. 2813 Instruction *Inst; 2814 SmallVector<std::pair<unsigned, MDNode *>, 4> MetadataOnInst; 2815 do { 2816 // This instruction may have three possibilities for a name: a) none 2817 // specified, b) name specified "%foo =", c) number specified: "%4 =". 2818 LocTy NameLoc = Lex.getLoc(); 2819 int NameID = -1; 2820 NameStr = ""; 2821 2822 if (Lex.getKind() == lltok::LocalVarID) { 2823 NameID = Lex.getUIntVal(); 2824 Lex.Lex(); 2825 if (ParseToken(lltok::equal, "expected '=' after instruction id")) 2826 return true; 2827 } else if (Lex.getKind() == lltok::LocalVar) { 2828 NameStr = Lex.getStrVal(); 2829 Lex.Lex(); 2830 if (ParseToken(lltok::equal, "expected '=' after instruction name")) 2831 return true; 2832 } 2833 2834 switch (ParseInstruction(Inst, BB, PFS)) { 2835 default: assert(0 && "Unknown ParseInstruction result!"); 2836 case InstError: return true; 2837 case InstNormal: 2838 BB->getInstList().push_back(Inst); 2839 2840 // With a normal result, we check to see if the instruction is followed by 2841 // a comma and metadata. 2842 if (EatIfPresent(lltok::comma)) 2843 if (ParseInstructionMetadata(Inst, &PFS)) 2844 return true; 2845 break; 2846 case InstExtraComma: 2847 BB->getInstList().push_back(Inst); 2848 2849 // If the instruction parser ate an extra comma at the end of it, it 2850 // *must* be followed by metadata. 2851 if (ParseInstructionMetadata(Inst, &PFS)) 2852 return true; 2853 break; 2854 } 2855 2856 // Set the name on the instruction. 2857 if (PFS.SetInstName(NameID, NameStr, NameLoc, Inst)) return true; 2858 } while (!isa<TerminatorInst>(Inst)); 2859 2860 return false; 2861} 2862 2863//===----------------------------------------------------------------------===// 2864// Instruction Parsing. 2865//===----------------------------------------------------------------------===// 2866 2867/// ParseInstruction - Parse one of the many different instructions. 2868/// 2869int LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB, 2870 PerFunctionState &PFS) { 2871 lltok::Kind Token = Lex.getKind(); 2872 if (Token == lltok::Eof) 2873 return TokError("found end of file when expecting more instructions"); 2874 LocTy Loc = Lex.getLoc(); 2875 unsigned KeywordVal = Lex.getUIntVal(); 2876 Lex.Lex(); // Eat the keyword. 2877 2878 switch (Token) { 2879 default: return Error(Loc, "expected instruction opcode"); 2880 // Terminator Instructions. 2881 case lltok::kw_unwind: Inst = new UnwindInst(Context); return false; 2882 case lltok::kw_unreachable: Inst = new UnreachableInst(Context); return false; 2883 case lltok::kw_ret: return ParseRet(Inst, BB, PFS); 2884 case lltok::kw_br: return ParseBr(Inst, PFS); 2885 case lltok::kw_switch: return ParseSwitch(Inst, PFS); 2886 case lltok::kw_indirectbr: return ParseIndirectBr(Inst, PFS); 2887 case lltok::kw_invoke: return ParseInvoke(Inst, PFS); 2888 case lltok::kw_resume: return ParseResume(Inst, PFS); 2889 // Binary Operators. 2890 case lltok::kw_add: 2891 case lltok::kw_sub: 2892 case lltok::kw_mul: 2893 case lltok::kw_shl: { 2894 bool NUW = EatIfPresent(lltok::kw_nuw); 2895 bool NSW = EatIfPresent(lltok::kw_nsw); 2896 if (!NUW) NUW = EatIfPresent(lltok::kw_nuw); 2897 2898 if (ParseArithmetic(Inst, PFS, KeywordVal, 1)) return true; 2899 2900 if (NUW) cast<BinaryOperator>(Inst)->setHasNoUnsignedWrap(true); 2901 if (NSW) cast<BinaryOperator>(Inst)->setHasNoSignedWrap(true); 2902 return false; 2903 } 2904 case lltok::kw_fadd: 2905 case lltok::kw_fsub: 2906 case lltok::kw_fmul: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2907 2908 case lltok::kw_sdiv: 2909 case lltok::kw_udiv: 2910 case lltok::kw_lshr: 2911 case lltok::kw_ashr: { 2912 bool Exact = EatIfPresent(lltok::kw_exact); 2913 2914 if (ParseArithmetic(Inst, PFS, KeywordVal, 1)) return true; 2915 if (Exact) cast<BinaryOperator>(Inst)->setIsExact(true); 2916 return false; 2917 } 2918 2919 case lltok::kw_urem: 2920 case lltok::kw_srem: return ParseArithmetic(Inst, PFS, KeywordVal, 1); 2921 case lltok::kw_fdiv: 2922 case lltok::kw_frem: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2923 case lltok::kw_and: 2924 case lltok::kw_or: 2925 case lltok::kw_xor: return ParseLogical(Inst, PFS, KeywordVal); 2926 case lltok::kw_icmp: 2927 case lltok::kw_fcmp: return ParseCompare(Inst, PFS, KeywordVal); 2928 // Casts. 2929 case lltok::kw_trunc: 2930 case lltok::kw_zext: 2931 case lltok::kw_sext: 2932 case lltok::kw_fptrunc: 2933 case lltok::kw_fpext: 2934 case lltok::kw_bitcast: 2935 case lltok::kw_uitofp: 2936 case lltok::kw_sitofp: 2937 case lltok::kw_fptoui: 2938 case lltok::kw_fptosi: 2939 case lltok::kw_inttoptr: 2940 case lltok::kw_ptrtoint: return ParseCast(Inst, PFS, KeywordVal); 2941 // Other. 2942 case lltok::kw_select: return ParseSelect(Inst, PFS); 2943 case lltok::kw_va_arg: return ParseVA_Arg(Inst, PFS); 2944 case lltok::kw_extractelement: return ParseExtractElement(Inst, PFS); 2945 case lltok::kw_insertelement: return ParseInsertElement(Inst, PFS); 2946 case lltok::kw_shufflevector: return ParseShuffleVector(Inst, PFS); 2947 case lltok::kw_phi: return ParsePHI(Inst, PFS); 2948 case lltok::kw_landingpad: return ParseLandingPad(Inst, PFS); 2949 case lltok::kw_call: return ParseCall(Inst, PFS, false); 2950 case lltok::kw_tail: return ParseCall(Inst, PFS, true); 2951 // Memory. 2952 case lltok::kw_alloca: return ParseAlloc(Inst, PFS); 2953 case lltok::kw_load: return ParseLoad(Inst, PFS, false); 2954 case lltok::kw_store: return ParseStore(Inst, PFS, false); 2955 case lltok::kw_cmpxchg: return ParseCmpXchg(Inst, PFS, false); 2956 case lltok::kw_atomicrmw: return ParseAtomicRMW(Inst, PFS, false); 2957 case lltok::kw_fence: return ParseFence(Inst, PFS); 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 if (EatIfPresent(lltok::kw_cmpxchg)) 2964 return ParseCmpXchg(Inst, PFS, true); 2965 else if (EatIfPresent(lltok::kw_atomicrmw)) 2966 return ParseAtomicRMW(Inst, PFS, true); 2967 else 2968 return TokError("expected 'load' or 'store'"); 2969 case lltok::kw_getelementptr: return ParseGetElementPtr(Inst, PFS); 2970 case lltok::kw_extractvalue: return ParseExtractValue(Inst, PFS); 2971 case lltok::kw_insertvalue: return ParseInsertValue(Inst, PFS); 2972 } 2973} 2974 2975/// ParseCmpPredicate - Parse an integer or fp predicate, based on Kind. 2976bool LLParser::ParseCmpPredicate(unsigned &P, unsigned Opc) { 2977 if (Opc == Instruction::FCmp) { 2978 switch (Lex.getKind()) { 2979 default: TokError("expected fcmp predicate (e.g. 'oeq')"); 2980 case lltok::kw_oeq: P = CmpInst::FCMP_OEQ; break; 2981 case lltok::kw_one: P = CmpInst::FCMP_ONE; break; 2982 case lltok::kw_olt: P = CmpInst::FCMP_OLT; break; 2983 case lltok::kw_ogt: P = CmpInst::FCMP_OGT; break; 2984 case lltok::kw_ole: P = CmpInst::FCMP_OLE; break; 2985 case lltok::kw_oge: P = CmpInst::FCMP_OGE; break; 2986 case lltok::kw_ord: P = CmpInst::FCMP_ORD; break; 2987 case lltok::kw_uno: P = CmpInst::FCMP_UNO; break; 2988 case lltok::kw_ueq: P = CmpInst::FCMP_UEQ; break; 2989 case lltok::kw_une: P = CmpInst::FCMP_UNE; break; 2990 case lltok::kw_ult: P = CmpInst::FCMP_ULT; break; 2991 case lltok::kw_ugt: P = CmpInst::FCMP_UGT; break; 2992 case lltok::kw_ule: P = CmpInst::FCMP_ULE; break; 2993 case lltok::kw_uge: P = CmpInst::FCMP_UGE; break; 2994 case lltok::kw_true: P = CmpInst::FCMP_TRUE; break; 2995 case lltok::kw_false: P = CmpInst::FCMP_FALSE; break; 2996 } 2997 } else { 2998 switch (Lex.getKind()) { 2999 default: TokError("expected icmp predicate (e.g. 'eq')"); 3000 case lltok::kw_eq: P = CmpInst::ICMP_EQ; break; 3001 case lltok::kw_ne: P = CmpInst::ICMP_NE; break; 3002 case lltok::kw_slt: P = CmpInst::ICMP_SLT; break; 3003 case lltok::kw_sgt: P = CmpInst::ICMP_SGT; break; 3004 case lltok::kw_sle: P = CmpInst::ICMP_SLE; break; 3005 case lltok::kw_sge: P = CmpInst::ICMP_SGE; break; 3006 case lltok::kw_ult: P = CmpInst::ICMP_ULT; break; 3007 case lltok::kw_ugt: P = CmpInst::ICMP_UGT; break; 3008 case lltok::kw_ule: P = CmpInst::ICMP_ULE; break; 3009 case lltok::kw_uge: P = CmpInst::ICMP_UGE; break; 3010 } 3011 } 3012 Lex.Lex(); 3013 return false; 3014} 3015 3016//===----------------------------------------------------------------------===// 3017// Terminator Instructions. 3018//===----------------------------------------------------------------------===// 3019 3020/// ParseRet - Parse a return instruction. 3021/// ::= 'ret' void (',' !dbg, !1)* 3022/// ::= 'ret' TypeAndValue (',' !dbg, !1)* 3023bool LLParser::ParseRet(Instruction *&Inst, BasicBlock *BB, 3024 PerFunctionState &PFS) { 3025 SMLoc TypeLoc = Lex.getLoc(); 3026 Type *Ty = 0; 3027 if (ParseType(Ty, true /*void allowed*/)) return true; 3028 3029 Type *ResType = PFS.getFunction().getReturnType(); 3030 3031 if (Ty->isVoidTy()) { 3032 if (!ResType->isVoidTy()) 3033 return Error(TypeLoc, "value doesn't match function result type '" + 3034 getTypeString(ResType) + "'"); 3035 3036 Inst = ReturnInst::Create(Context); 3037 return false; 3038 } 3039 3040 Value *RV; 3041 if (ParseValue(Ty, RV, PFS)) return true; 3042 3043 if (ResType != RV->getType()) 3044 return Error(TypeLoc, "value doesn't match function result type '" + 3045 getTypeString(ResType) + "'"); 3046 3047 Inst = ReturnInst::Create(Context, RV); 3048 return false; 3049} 3050 3051 3052/// ParseBr 3053/// ::= 'br' TypeAndValue 3054/// ::= 'br' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3055bool LLParser::ParseBr(Instruction *&Inst, PerFunctionState &PFS) { 3056 LocTy Loc, Loc2; 3057 Value *Op0; 3058 BasicBlock *Op1, *Op2; 3059 if (ParseTypeAndValue(Op0, Loc, PFS)) return true; 3060 3061 if (BasicBlock *BB = dyn_cast<BasicBlock>(Op0)) { 3062 Inst = BranchInst::Create(BB); 3063 return false; 3064 } 3065 3066 if (Op0->getType() != Type::getInt1Ty(Context)) 3067 return Error(Loc, "branch condition must have 'i1' type"); 3068 3069 if (ParseToken(lltok::comma, "expected ',' after branch condition") || 3070 ParseTypeAndBasicBlock(Op1, Loc, PFS) || 3071 ParseToken(lltok::comma, "expected ',' after true destination") || 3072 ParseTypeAndBasicBlock(Op2, Loc2, PFS)) 3073 return true; 3074 3075 Inst = BranchInst::Create(Op1, Op2, Op0); 3076 return false; 3077} 3078 3079/// ParseSwitch 3080/// Instruction 3081/// ::= 'switch' TypeAndValue ',' TypeAndValue '[' JumpTable ']' 3082/// JumpTable 3083/// ::= (TypeAndValue ',' TypeAndValue)* 3084bool LLParser::ParseSwitch(Instruction *&Inst, PerFunctionState &PFS) { 3085 LocTy CondLoc, BBLoc; 3086 Value *Cond; 3087 BasicBlock *DefaultBB; 3088 if (ParseTypeAndValue(Cond, CondLoc, PFS) || 3089 ParseToken(lltok::comma, "expected ',' after switch condition") || 3090 ParseTypeAndBasicBlock(DefaultBB, BBLoc, PFS) || 3091 ParseToken(lltok::lsquare, "expected '[' with switch table")) 3092 return true; 3093 3094 if (!Cond->getType()->isIntegerTy()) 3095 return Error(CondLoc, "switch condition must have integer type"); 3096 3097 // Parse the jump table pairs. 3098 SmallPtrSet<Value*, 32> SeenCases; 3099 SmallVector<std::pair<ConstantInt*, BasicBlock*>, 32> Table; 3100 while (Lex.getKind() != lltok::rsquare) { 3101 Value *Constant; 3102 BasicBlock *DestBB; 3103 3104 if (ParseTypeAndValue(Constant, CondLoc, PFS) || 3105 ParseToken(lltok::comma, "expected ',' after case value") || 3106 ParseTypeAndBasicBlock(DestBB, PFS)) 3107 return true; 3108 3109 if (!SeenCases.insert(Constant)) 3110 return Error(CondLoc, "duplicate case value in switch"); 3111 if (!isa<ConstantInt>(Constant)) 3112 return Error(CondLoc, "case value is not a constant integer"); 3113 3114 Table.push_back(std::make_pair(cast<ConstantInt>(Constant), DestBB)); 3115 } 3116 3117 Lex.Lex(); // Eat the ']'. 3118 3119 SwitchInst *SI = SwitchInst::Create(Cond, DefaultBB, Table.size()); 3120 for (unsigned i = 0, e = Table.size(); i != e; ++i) 3121 SI->addCase(Table[i].first, Table[i].second); 3122 Inst = SI; 3123 return false; 3124} 3125 3126/// ParseIndirectBr 3127/// Instruction 3128/// ::= 'indirectbr' TypeAndValue ',' '[' LabelList ']' 3129bool LLParser::ParseIndirectBr(Instruction *&Inst, PerFunctionState &PFS) { 3130 LocTy AddrLoc; 3131 Value *Address; 3132 if (ParseTypeAndValue(Address, AddrLoc, PFS) || 3133 ParseToken(lltok::comma, "expected ',' after indirectbr address") || 3134 ParseToken(lltok::lsquare, "expected '[' with indirectbr")) 3135 return true; 3136 3137 if (!Address->getType()->isPointerTy()) 3138 return Error(AddrLoc, "indirectbr address must have pointer type"); 3139 3140 // Parse the destination list. 3141 SmallVector<BasicBlock*, 16> DestList; 3142 3143 if (Lex.getKind() != lltok::rsquare) { 3144 BasicBlock *DestBB; 3145 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3146 return true; 3147 DestList.push_back(DestBB); 3148 3149 while (EatIfPresent(lltok::comma)) { 3150 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3151 return true; 3152 DestList.push_back(DestBB); 3153 } 3154 } 3155 3156 if (ParseToken(lltok::rsquare, "expected ']' at end of block list")) 3157 return true; 3158 3159 IndirectBrInst *IBI = IndirectBrInst::Create(Address, DestList.size()); 3160 for (unsigned i = 0, e = DestList.size(); i != e; ++i) 3161 IBI->addDestination(DestList[i]); 3162 Inst = IBI; 3163 return false; 3164} 3165 3166 3167/// ParseInvoke 3168/// ::= 'invoke' OptionalCallingConv OptionalAttrs Type Value ParamList 3169/// OptionalAttrs 'to' TypeAndValue 'unwind' TypeAndValue 3170bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) { 3171 LocTy CallLoc = Lex.getLoc(); 3172 unsigned RetAttrs, FnAttrs; 3173 CallingConv::ID CC; 3174 Type *RetType = 0; 3175 LocTy RetTypeLoc; 3176 ValID CalleeID; 3177 SmallVector<ParamInfo, 16> ArgList; 3178 3179 BasicBlock *NormalBB, *UnwindBB; 3180 if (ParseOptionalCallingConv(CC) || 3181 ParseOptionalAttrs(RetAttrs, 1) || 3182 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3183 ParseValID(CalleeID) || 3184 ParseParameterList(ArgList, PFS) || 3185 ParseOptionalAttrs(FnAttrs, 2) || 3186 ParseToken(lltok::kw_to, "expected 'to' in invoke") || 3187 ParseTypeAndBasicBlock(NormalBB, PFS) || 3188 ParseToken(lltok::kw_unwind, "expected 'unwind' in invoke") || 3189 ParseTypeAndBasicBlock(UnwindBB, PFS)) 3190 return true; 3191 3192 // If RetType is a non-function pointer type, then this is the short syntax 3193 // for the call, which means that RetType is just the return type. Infer the 3194 // rest of the function argument types from the arguments that are present. 3195 PointerType *PFTy = 0; 3196 FunctionType *Ty = 0; 3197 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3198 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3199 // Pull out the types of all of the arguments... 3200 std::vector<Type*> ParamTypes; 3201 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3202 ParamTypes.push_back(ArgList[i].V->getType()); 3203 3204 if (!FunctionType::isValidReturnType(RetType)) 3205 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3206 3207 Ty = FunctionType::get(RetType, ParamTypes, false); 3208 PFTy = PointerType::getUnqual(Ty); 3209 } 3210 3211 // Look up the callee. 3212 Value *Callee; 3213 if (ConvertValIDToValue(PFTy, CalleeID, Callee, &PFS)) return true; 3214 3215 // Set up the Attributes for the function. 3216 SmallVector<AttributeWithIndex, 8> Attrs; 3217 if (RetAttrs != Attribute::None) 3218 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3219 3220 SmallVector<Value*, 8> Args; 3221 3222 // Loop through FunctionType's arguments and ensure they are specified 3223 // correctly. Also, gather any parameter attributes. 3224 FunctionType::param_iterator I = Ty->param_begin(); 3225 FunctionType::param_iterator E = Ty->param_end(); 3226 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3227 Type *ExpectedTy = 0; 3228 if (I != E) { 3229 ExpectedTy = *I++; 3230 } else if (!Ty->isVarArg()) { 3231 return Error(ArgList[i].Loc, "too many arguments specified"); 3232 } 3233 3234 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3235 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3236 getTypeString(ExpectedTy) + "'"); 3237 Args.push_back(ArgList[i].V); 3238 if (ArgList[i].Attrs != Attribute::None) 3239 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3240 } 3241 3242 if (I != E) 3243 return Error(CallLoc, "not enough parameters specified for call"); 3244 3245 if (FnAttrs != Attribute::None) 3246 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3247 3248 // Finish off the Attributes and check them 3249 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3250 3251 InvokeInst *II = InvokeInst::Create(Callee, NormalBB, UnwindBB, Args); 3252 II->setCallingConv(CC); 3253 II->setAttributes(PAL); 3254 Inst = II; 3255 return false; 3256} 3257 3258/// ParseResume 3259/// ::= 'resume' TypeAndValue 3260bool LLParser::ParseResume(Instruction *&Inst, PerFunctionState &PFS) { 3261 Value *Exn; LocTy ExnLoc; 3262 LocTy Loc = Lex.getLoc(); 3263 if (ParseTypeAndValue(Exn, ExnLoc, PFS)) 3264 return true; 3265 3266 ResumeInst *RI = ResumeInst::Create(Context, Exn); 3267 Inst = RI; 3268 return false; 3269} 3270 3271//===----------------------------------------------------------------------===// 3272// Binary Operators. 3273//===----------------------------------------------------------------------===// 3274 3275/// ParseArithmetic 3276/// ::= ArithmeticOps TypeAndValue ',' Value 3277/// 3278/// If OperandType is 0, then any FP or integer operand is allowed. If it is 1, 3279/// then any integer operand is allowed, if it is 2, any fp operand is allowed. 3280bool LLParser::ParseArithmetic(Instruction *&Inst, PerFunctionState &PFS, 3281 unsigned Opc, unsigned OperandType) { 3282 LocTy Loc; Value *LHS, *RHS; 3283 if (ParseTypeAndValue(LHS, Loc, PFS) || 3284 ParseToken(lltok::comma, "expected ',' in arithmetic operation") || 3285 ParseValue(LHS->getType(), RHS, PFS)) 3286 return true; 3287 3288 bool Valid; 3289 switch (OperandType) { 3290 default: llvm_unreachable("Unknown operand type!"); 3291 case 0: // int or FP. 3292 Valid = LHS->getType()->isIntOrIntVectorTy() || 3293 LHS->getType()->isFPOrFPVectorTy(); 3294 break; 3295 case 1: Valid = LHS->getType()->isIntOrIntVectorTy(); break; 3296 case 2: Valid = LHS->getType()->isFPOrFPVectorTy(); break; 3297 } 3298 3299 if (!Valid) 3300 return Error(Loc, "invalid operand type for instruction"); 3301 3302 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3303 return false; 3304} 3305 3306/// ParseLogical 3307/// ::= ArithmeticOps TypeAndValue ',' Value { 3308bool LLParser::ParseLogical(Instruction *&Inst, PerFunctionState &PFS, 3309 unsigned Opc) { 3310 LocTy Loc; Value *LHS, *RHS; 3311 if (ParseTypeAndValue(LHS, Loc, PFS) || 3312 ParseToken(lltok::comma, "expected ',' in logical operation") || 3313 ParseValue(LHS->getType(), RHS, PFS)) 3314 return true; 3315 3316 if (!LHS->getType()->isIntOrIntVectorTy()) 3317 return Error(Loc,"instruction requires integer or integer vector operands"); 3318 3319 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3320 return false; 3321} 3322 3323 3324/// ParseCompare 3325/// ::= 'icmp' IPredicates TypeAndValue ',' Value 3326/// ::= 'fcmp' FPredicates TypeAndValue ',' Value 3327bool LLParser::ParseCompare(Instruction *&Inst, PerFunctionState &PFS, 3328 unsigned Opc) { 3329 // Parse the integer/fp comparison predicate. 3330 LocTy Loc; 3331 unsigned Pred; 3332 Value *LHS, *RHS; 3333 if (ParseCmpPredicate(Pred, Opc) || 3334 ParseTypeAndValue(LHS, Loc, PFS) || 3335 ParseToken(lltok::comma, "expected ',' after compare value") || 3336 ParseValue(LHS->getType(), RHS, PFS)) 3337 return true; 3338 3339 if (Opc == Instruction::FCmp) { 3340 if (!LHS->getType()->isFPOrFPVectorTy()) 3341 return Error(Loc, "fcmp requires floating point operands"); 3342 Inst = new FCmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3343 } else { 3344 assert(Opc == Instruction::ICmp && "Unknown opcode for CmpInst!"); 3345 if (!LHS->getType()->isIntOrIntVectorTy() && 3346 !LHS->getType()->isPointerTy()) 3347 return Error(Loc, "icmp requires integer operands"); 3348 Inst = new ICmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3349 } 3350 return false; 3351} 3352 3353//===----------------------------------------------------------------------===// 3354// Other Instructions. 3355//===----------------------------------------------------------------------===// 3356 3357 3358/// ParseCast 3359/// ::= CastOpc TypeAndValue 'to' Type 3360bool LLParser::ParseCast(Instruction *&Inst, PerFunctionState &PFS, 3361 unsigned Opc) { 3362 LocTy Loc; 3363 Value *Op; 3364 Type *DestTy = 0; 3365 if (ParseTypeAndValue(Op, Loc, PFS) || 3366 ParseToken(lltok::kw_to, "expected 'to' after cast value") || 3367 ParseType(DestTy)) 3368 return true; 3369 3370 if (!CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy)) { 3371 CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy); 3372 return Error(Loc, "invalid cast opcode for cast from '" + 3373 getTypeString(Op->getType()) + "' to '" + 3374 getTypeString(DestTy) + "'"); 3375 } 3376 Inst = CastInst::Create((Instruction::CastOps)Opc, Op, DestTy); 3377 return false; 3378} 3379 3380/// ParseSelect 3381/// ::= 'select' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3382bool LLParser::ParseSelect(Instruction *&Inst, PerFunctionState &PFS) { 3383 LocTy Loc; 3384 Value *Op0, *Op1, *Op2; 3385 if (ParseTypeAndValue(Op0, Loc, PFS) || 3386 ParseToken(lltok::comma, "expected ',' after select condition") || 3387 ParseTypeAndValue(Op1, PFS) || 3388 ParseToken(lltok::comma, "expected ',' after select value") || 3389 ParseTypeAndValue(Op2, PFS)) 3390 return true; 3391 3392 if (const char *Reason = SelectInst::areInvalidOperands(Op0, Op1, Op2)) 3393 return Error(Loc, Reason); 3394 3395 Inst = SelectInst::Create(Op0, Op1, Op2); 3396 return false; 3397} 3398 3399/// ParseVA_Arg 3400/// ::= 'va_arg' TypeAndValue ',' Type 3401bool LLParser::ParseVA_Arg(Instruction *&Inst, PerFunctionState &PFS) { 3402 Value *Op; 3403 Type *EltTy = 0; 3404 LocTy TypeLoc; 3405 if (ParseTypeAndValue(Op, PFS) || 3406 ParseToken(lltok::comma, "expected ',' after vaarg operand") || 3407 ParseType(EltTy, TypeLoc)) 3408 return true; 3409 3410 if (!EltTy->isFirstClassType()) 3411 return Error(TypeLoc, "va_arg requires operand with first class type"); 3412 3413 Inst = new VAArgInst(Op, EltTy); 3414 return false; 3415} 3416 3417/// ParseExtractElement 3418/// ::= 'extractelement' TypeAndValue ',' TypeAndValue 3419bool LLParser::ParseExtractElement(Instruction *&Inst, PerFunctionState &PFS) { 3420 LocTy Loc; 3421 Value *Op0, *Op1; 3422 if (ParseTypeAndValue(Op0, Loc, PFS) || 3423 ParseToken(lltok::comma, "expected ',' after extract value") || 3424 ParseTypeAndValue(Op1, PFS)) 3425 return true; 3426 3427 if (!ExtractElementInst::isValidOperands(Op0, Op1)) 3428 return Error(Loc, "invalid extractelement operands"); 3429 3430 Inst = ExtractElementInst::Create(Op0, Op1); 3431 return false; 3432} 3433 3434/// ParseInsertElement 3435/// ::= 'insertelement' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3436bool LLParser::ParseInsertElement(Instruction *&Inst, PerFunctionState &PFS) { 3437 LocTy Loc; 3438 Value *Op0, *Op1, *Op2; 3439 if (ParseTypeAndValue(Op0, Loc, PFS) || 3440 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3441 ParseTypeAndValue(Op1, PFS) || 3442 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3443 ParseTypeAndValue(Op2, PFS)) 3444 return true; 3445 3446 if (!InsertElementInst::isValidOperands(Op0, Op1, Op2)) 3447 return Error(Loc, "invalid insertelement operands"); 3448 3449 Inst = InsertElementInst::Create(Op0, Op1, Op2); 3450 return false; 3451} 3452 3453/// ParseShuffleVector 3454/// ::= 'shufflevector' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3455bool LLParser::ParseShuffleVector(Instruction *&Inst, PerFunctionState &PFS) { 3456 LocTy Loc; 3457 Value *Op0, *Op1, *Op2; 3458 if (ParseTypeAndValue(Op0, Loc, PFS) || 3459 ParseToken(lltok::comma, "expected ',' after shuffle mask") || 3460 ParseTypeAndValue(Op1, PFS) || 3461 ParseToken(lltok::comma, "expected ',' after shuffle value") || 3462 ParseTypeAndValue(Op2, PFS)) 3463 return true; 3464 3465 if (!ShuffleVectorInst::isValidOperands(Op0, Op1, Op2)) 3466 return Error(Loc, "invalid extractelement operands"); 3467 3468 Inst = new ShuffleVectorInst(Op0, Op1, Op2); 3469 return false; 3470} 3471 3472/// ParsePHI 3473/// ::= 'phi' Type '[' Value ',' Value ']' (',' '[' Value ',' Value ']')* 3474int LLParser::ParsePHI(Instruction *&Inst, PerFunctionState &PFS) { 3475 Type *Ty = 0; LocTy TypeLoc; 3476 Value *Op0, *Op1; 3477 3478 if (ParseType(Ty, TypeLoc) || 3479 ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3480 ParseValue(Ty, Op0, PFS) || 3481 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3482 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3483 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3484 return true; 3485 3486 bool AteExtraComma = false; 3487 SmallVector<std::pair<Value*, BasicBlock*>, 16> PHIVals; 3488 while (1) { 3489 PHIVals.push_back(std::make_pair(Op0, cast<BasicBlock>(Op1))); 3490 3491 if (!EatIfPresent(lltok::comma)) 3492 break; 3493 3494 if (Lex.getKind() == lltok::MetadataVar) { 3495 AteExtraComma = true; 3496 break; 3497 } 3498 3499 if (ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3500 ParseValue(Ty, Op0, PFS) || 3501 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3502 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3503 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3504 return true; 3505 } 3506 3507 if (!Ty->isFirstClassType()) 3508 return Error(TypeLoc, "phi node must have first class type"); 3509 3510 PHINode *PN = PHINode::Create(Ty, PHIVals.size()); 3511 for (unsigned i = 0, e = PHIVals.size(); i != e; ++i) 3512 PN->addIncoming(PHIVals[i].first, PHIVals[i].second); 3513 Inst = PN; 3514 return AteExtraComma ? InstExtraComma : InstNormal; 3515} 3516 3517/// ParseLandingPad 3518/// ::= 'landingpad' Type 'personality' TypeAndValue 'cleanup'? 3519/// (ClauseID ClauseList)+ 3520/// ClauseID 3521/// ::= 'catch' 3522/// ::= 'filter' 3523/// ClauseList 3524/// ::= TypeAndValue (',' TypeAndValue)* 3525bool LLParser::ParseLandingPad(Instruction *&Inst, PerFunctionState &PFS) { 3526 Type *Ty = 0; LocTy TyLoc; 3527 Value *PersFn; LocTy PersFnLoc; 3528 LocTy LPLoc = Lex.getLoc(); 3529 3530 if (ParseType(Ty, TyLoc) || 3531 ParseToken(lltok::kw_personality, "expected 'personality'") || 3532 ParseTypeAndValue(PersFn, PersFnLoc, PFS)) 3533 return true; 3534 3535 bool IsCleanup = EatIfPresent(lltok::kw_cleanup); 3536 3537 SmallVector<std::pair<LandingPadInst::ClauseType, Constant*>, 16> Clauses; 3538 while (Lex.getKind() == lltok::kw_catch || Lex.getKind() == lltok::kw_filter){ 3539 LandingPadInst::ClauseType CT; 3540 if (Lex.getKind() == lltok::kw_catch) { 3541 CT = LandingPadInst::Catch; 3542 ParseToken(lltok::kw_catch, "expected 'catch'"); 3543 } else { 3544 CT = LandingPadInst::Filter; 3545 ParseToken(lltok::kw_filter, "expected 'filter'"); 3546 } 3547 3548 do { 3549 Value *V; LocTy VLoc; 3550 if (ParseTypeAndValue(V, VLoc, PFS)) 3551 return true; 3552 Clauses.push_back(std::make_pair(CT, cast<Constant>(V))); 3553 } while (EatIfPresent(lltok::comma)); 3554 } 3555 3556 LandingPadInst *LP = LandingPadInst::Create(Ty, cast<Function>(PersFn), 3557 Clauses.size()); 3558 LP->setCleanup(IsCleanup); 3559 3560 for (SmallVectorImpl<std::pair<LandingPadInst::ClauseType, 3561 Constant*> >::iterator 3562 I = Clauses.begin(), E = Clauses.end(); I != E; ++I) 3563 LP->addClause(I->first, I->second); 3564 3565 Inst = LP; 3566 return false; 3567} 3568 3569/// ParseCall 3570/// ::= 'tail'? 'call' OptionalCallingConv OptionalAttrs Type Value 3571/// ParameterList OptionalAttrs 3572bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS, 3573 bool isTail) { 3574 unsigned RetAttrs, FnAttrs; 3575 CallingConv::ID CC; 3576 Type *RetType = 0; 3577 LocTy RetTypeLoc; 3578 ValID CalleeID; 3579 SmallVector<ParamInfo, 16> ArgList; 3580 LocTy CallLoc = Lex.getLoc(); 3581 3582 if ((isTail && ParseToken(lltok::kw_call, "expected 'tail call'")) || 3583 ParseOptionalCallingConv(CC) || 3584 ParseOptionalAttrs(RetAttrs, 1) || 3585 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3586 ParseValID(CalleeID) || 3587 ParseParameterList(ArgList, PFS) || 3588 ParseOptionalAttrs(FnAttrs, 2)) 3589 return true; 3590 3591 // If RetType is a non-function pointer type, then this is the short syntax 3592 // for the call, which means that RetType is just the return type. Infer the 3593 // rest of the function argument types from the arguments that are present. 3594 PointerType *PFTy = 0; 3595 FunctionType *Ty = 0; 3596 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3597 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3598 // Pull out the types of all of the arguments... 3599 std::vector<Type*> ParamTypes; 3600 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3601 ParamTypes.push_back(ArgList[i].V->getType()); 3602 3603 if (!FunctionType::isValidReturnType(RetType)) 3604 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3605 3606 Ty = FunctionType::get(RetType, ParamTypes, false); 3607 PFTy = PointerType::getUnqual(Ty); 3608 } 3609 3610 // Look up the callee. 3611 Value *Callee; 3612 if (ConvertValIDToValue(PFTy, CalleeID, Callee, &PFS)) return true; 3613 3614 // Set up the Attributes for the function. 3615 SmallVector<AttributeWithIndex, 8> Attrs; 3616 if (RetAttrs != Attribute::None) 3617 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3618 3619 SmallVector<Value*, 8> Args; 3620 3621 // Loop through FunctionType's arguments and ensure they are specified 3622 // correctly. Also, gather any parameter attributes. 3623 FunctionType::param_iterator I = Ty->param_begin(); 3624 FunctionType::param_iterator E = Ty->param_end(); 3625 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3626 Type *ExpectedTy = 0; 3627 if (I != E) { 3628 ExpectedTy = *I++; 3629 } else if (!Ty->isVarArg()) { 3630 return Error(ArgList[i].Loc, "too many arguments specified"); 3631 } 3632 3633 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3634 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3635 getTypeString(ExpectedTy) + "'"); 3636 Args.push_back(ArgList[i].V); 3637 if (ArgList[i].Attrs != Attribute::None) 3638 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3639 } 3640 3641 if (I != E) 3642 return Error(CallLoc, "not enough parameters specified for call"); 3643 3644 if (FnAttrs != Attribute::None) 3645 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3646 3647 // Finish off the Attributes and check them 3648 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3649 3650 CallInst *CI = CallInst::Create(Callee, Args); 3651 CI->setTailCall(isTail); 3652 CI->setCallingConv(CC); 3653 CI->setAttributes(PAL); 3654 Inst = CI; 3655 return false; 3656} 3657 3658//===----------------------------------------------------------------------===// 3659// Memory Instructions. 3660//===----------------------------------------------------------------------===// 3661 3662/// ParseAlloc 3663/// ::= 'alloca' Type (',' TypeAndValue)? (',' OptionalInfo)? 3664int LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS) { 3665 Value *Size = 0; 3666 LocTy SizeLoc; 3667 unsigned Alignment = 0; 3668 Type *Ty = 0; 3669 if (ParseType(Ty)) return true; 3670 3671 bool AteExtraComma = false; 3672 if (EatIfPresent(lltok::comma)) { 3673 if (Lex.getKind() == lltok::kw_align) { 3674 if (ParseOptionalAlignment(Alignment)) return true; 3675 } else if (Lex.getKind() == lltok::MetadataVar) { 3676 AteExtraComma = true; 3677 } else { 3678 if (ParseTypeAndValue(Size, SizeLoc, PFS) || 3679 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3680 return true; 3681 } 3682 } 3683 3684 if (Size && !Size->getType()->isIntegerTy()) 3685 return Error(SizeLoc, "element count must have integer type"); 3686 3687 Inst = new AllocaInst(Ty, Size, Alignment); 3688 return AteExtraComma ? InstExtraComma : InstNormal; 3689} 3690 3691/// ParseLoad 3692/// ::= 'volatile'? 'load' TypeAndValue (',' OptionalInfo)? 3693int LLParser::ParseLoad(Instruction *&Inst, PerFunctionState &PFS, 3694 bool isVolatile) { 3695 Value *Val; LocTy Loc; 3696 unsigned Alignment = 0; 3697 bool AteExtraComma = false; 3698 if (ParseTypeAndValue(Val, Loc, PFS) || 3699 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3700 return true; 3701 3702 if (!Val->getType()->isPointerTy() || 3703 !cast<PointerType>(Val->getType())->getElementType()->isFirstClassType()) 3704 return Error(Loc, "load operand must be a pointer to a first class type"); 3705 3706 Inst = new LoadInst(Val, "", isVolatile, Alignment); 3707 return AteExtraComma ? InstExtraComma : InstNormal; 3708} 3709 3710/// ParseStore 3711/// ::= 'volatile'? 'store' TypeAndValue ',' TypeAndValue (',' 'align' i32)? 3712int LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS, 3713 bool isVolatile) { 3714 Value *Val, *Ptr; LocTy Loc, PtrLoc; 3715 unsigned Alignment = 0; 3716 bool AteExtraComma = false; 3717 if (ParseTypeAndValue(Val, Loc, PFS) || 3718 ParseToken(lltok::comma, "expected ',' after store operand") || 3719 ParseTypeAndValue(Ptr, PtrLoc, PFS) || 3720 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3721 return true; 3722 3723 if (!Ptr->getType()->isPointerTy()) 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 AteExtraComma ? InstExtraComma : InstNormal; 3732} 3733 3734/// ParseCmpXchg 3735/// ::= 'volatile'? 'cmpxchg' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3736/// 'singlethread'? AtomicOrdering 3737int LLParser::ParseCmpXchg(Instruction *&Inst, PerFunctionState &PFS, 3738 bool isVolatile) { 3739 Value *Ptr, *Cmp, *New; LocTy PtrLoc, CmpLoc, NewLoc; 3740 bool AteExtraComma = false; 3741 AtomicOrdering Ordering = NotAtomic; 3742 SynchronizationScope Scope = CrossThread; 3743 if (ParseTypeAndValue(Ptr, PtrLoc, PFS) || 3744 ParseToken(lltok::comma, "expected ',' after cmpxchg address") || 3745 ParseTypeAndValue(Cmp, CmpLoc, PFS) || 3746 ParseToken(lltok::comma, "expected ',' after cmpxchg cmp operand") || 3747 ParseTypeAndValue(New, NewLoc, PFS) || 3748 ParseScopeAndOrdering(true /*Always atomic*/, Scope, Ordering)) 3749 return true; 3750 3751 if (Ordering == Unordered) 3752 return TokError("cmpxchg cannot be unordered"); 3753 if (!Ptr->getType()->isPointerTy()) 3754 return Error(PtrLoc, "cmpxchg operand must be a pointer"); 3755 if (cast<PointerType>(Ptr->getType())->getElementType() != Cmp->getType()) 3756 return Error(CmpLoc, "compare value and pointer type do not match"); 3757 if (cast<PointerType>(Ptr->getType())->getElementType() != New->getType()) 3758 return Error(NewLoc, "new value and pointer type do not match"); 3759 if (!New->getType()->isIntegerTy()) 3760 return Error(NewLoc, "cmpxchg operand must be an integer"); 3761 unsigned Size = New->getType()->getPrimitiveSizeInBits(); 3762 if (Size < 8 || (Size & (Size - 1))) 3763 return Error(NewLoc, "cmpxchg operand must be power-of-two byte-sized" 3764 " integer"); 3765 3766 AtomicCmpXchgInst *CXI = 3767 new AtomicCmpXchgInst(Ptr, Cmp, New, Ordering, Scope); 3768 CXI->setVolatile(isVolatile); 3769 Inst = CXI; 3770 return AteExtraComma ? InstExtraComma : InstNormal; 3771} 3772 3773/// ParseAtomicRMW 3774/// ::= 'volatile'? 'atomicrmw' BinOp TypeAndValue ',' TypeAndValue 3775/// 'singlethread'? AtomicOrdering 3776int LLParser::ParseAtomicRMW(Instruction *&Inst, PerFunctionState &PFS, 3777 bool isVolatile) { 3778 Value *Ptr, *Val; LocTy PtrLoc, ValLoc; 3779 bool AteExtraComma = false; 3780 AtomicOrdering Ordering = NotAtomic; 3781 SynchronizationScope Scope = CrossThread; 3782 AtomicRMWInst::BinOp Operation; 3783 switch (Lex.getKind()) { 3784 default: return TokError("expected binary operation in atomicrmw"); 3785 case lltok::kw_xchg: Operation = AtomicRMWInst::Xchg; break; 3786 case lltok::kw_add: Operation = AtomicRMWInst::Add; break; 3787 case lltok::kw_sub: Operation = AtomicRMWInst::Sub; break; 3788 case lltok::kw_and: Operation = AtomicRMWInst::And; break; 3789 case lltok::kw_nand: Operation = AtomicRMWInst::Nand; break; 3790 case lltok::kw_or: Operation = AtomicRMWInst::Or; break; 3791 case lltok::kw_xor: Operation = AtomicRMWInst::Xor; break; 3792 case lltok::kw_max: Operation = AtomicRMWInst::Max; break; 3793 case lltok::kw_min: Operation = AtomicRMWInst::Min; break; 3794 case lltok::kw_umax: Operation = AtomicRMWInst::UMax; break; 3795 case lltok::kw_umin: Operation = AtomicRMWInst::UMin; break; 3796 } 3797 Lex.Lex(); // Eat the operation. 3798 3799 if (ParseTypeAndValue(Ptr, PtrLoc, PFS) || 3800 ParseToken(lltok::comma, "expected ',' after atomicrmw address") || 3801 ParseTypeAndValue(Val, ValLoc, PFS) || 3802 ParseScopeAndOrdering(true /*Always atomic*/, Scope, Ordering)) 3803 return true; 3804 3805 if (Ordering == Unordered) 3806 return TokError("atomicrmw cannot be unordered"); 3807 if (!Ptr->getType()->isPointerTy()) 3808 return Error(PtrLoc, "atomicrmw operand must be a pointer"); 3809 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType()) 3810 return Error(ValLoc, "atomicrmw value and pointer type do not match"); 3811 if (!Val->getType()->isIntegerTy()) 3812 return Error(ValLoc, "atomicrmw operand must be an integer"); 3813 unsigned Size = Val->getType()->getPrimitiveSizeInBits(); 3814 if (Size < 8 || (Size & (Size - 1))) 3815 return Error(ValLoc, "atomicrmw operand must be power-of-two byte-sized" 3816 " integer"); 3817 3818 AtomicRMWInst *RMWI = 3819 new AtomicRMWInst(Operation, Ptr, Val, Ordering, Scope); 3820 RMWI->setVolatile(isVolatile); 3821 Inst = RMWI; 3822 return AteExtraComma ? InstExtraComma : InstNormal; 3823} 3824 3825/// ParseFence 3826/// ::= 'fence' 'singlethread'? AtomicOrdering 3827int LLParser::ParseFence(Instruction *&Inst, PerFunctionState &PFS) { 3828 AtomicOrdering Ordering = NotAtomic; 3829 SynchronizationScope Scope = CrossThread; 3830 if (ParseScopeAndOrdering(true /*Always atomic*/, Scope, Ordering)) 3831 return true; 3832 3833 if (Ordering == Unordered) 3834 return TokError("fence cannot be unordered"); 3835 if (Ordering == Monotonic) 3836 return TokError("fence cannot be monotonic"); 3837 3838 Inst = new FenceInst(Context, Ordering, Scope); 3839 return InstNormal; 3840} 3841 3842/// ParseGetElementPtr 3843/// ::= 'getelementptr' 'inbounds'? TypeAndValue (',' TypeAndValue)* 3844int LLParser::ParseGetElementPtr(Instruction *&Inst, PerFunctionState &PFS) { 3845 Value *Ptr, *Val; LocTy Loc, EltLoc; 3846 3847 bool InBounds = EatIfPresent(lltok::kw_inbounds); 3848 3849 if (ParseTypeAndValue(Ptr, Loc, PFS)) return true; 3850 3851 if (!Ptr->getType()->isPointerTy()) 3852 return Error(Loc, "base of getelementptr must be a pointer"); 3853 3854 SmallVector<Value*, 16> Indices; 3855 bool AteExtraComma = false; 3856 while (EatIfPresent(lltok::comma)) { 3857 if (Lex.getKind() == lltok::MetadataVar) { 3858 AteExtraComma = true; 3859 break; 3860 } 3861 if (ParseTypeAndValue(Val, EltLoc, PFS)) return true; 3862 if (!Val->getType()->isIntegerTy()) 3863 return Error(EltLoc, "getelementptr index must be an integer"); 3864 Indices.push_back(Val); 3865 } 3866 3867 if (!GetElementPtrInst::getIndexedType(Ptr->getType(), Indices)) 3868 return Error(Loc, "invalid getelementptr indices"); 3869 Inst = GetElementPtrInst::Create(Ptr, Indices); 3870 if (InBounds) 3871 cast<GetElementPtrInst>(Inst)->setIsInBounds(true); 3872 return AteExtraComma ? InstExtraComma : InstNormal; 3873} 3874 3875/// ParseExtractValue 3876/// ::= 'extractvalue' TypeAndValue (',' uint32)+ 3877int LLParser::ParseExtractValue(Instruction *&Inst, PerFunctionState &PFS) { 3878 Value *Val; LocTy Loc; 3879 SmallVector<unsigned, 4> Indices; 3880 bool AteExtraComma; 3881 if (ParseTypeAndValue(Val, Loc, PFS) || 3882 ParseIndexList(Indices, AteExtraComma)) 3883 return true; 3884 3885 if (!Val->getType()->isAggregateType()) 3886 return Error(Loc, "extractvalue operand must be aggregate type"); 3887 3888 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices)) 3889 return Error(Loc, "invalid indices for extractvalue"); 3890 Inst = ExtractValueInst::Create(Val, Indices); 3891 return AteExtraComma ? InstExtraComma : InstNormal; 3892} 3893 3894/// ParseInsertValue 3895/// ::= 'insertvalue' TypeAndValue ',' TypeAndValue (',' uint32)+ 3896int LLParser::ParseInsertValue(Instruction *&Inst, PerFunctionState &PFS) { 3897 Value *Val0, *Val1; LocTy Loc0, Loc1; 3898 SmallVector<unsigned, 4> Indices; 3899 bool AteExtraComma; 3900 if (ParseTypeAndValue(Val0, Loc0, PFS) || 3901 ParseToken(lltok::comma, "expected comma after insertvalue operand") || 3902 ParseTypeAndValue(Val1, Loc1, PFS) || 3903 ParseIndexList(Indices, AteExtraComma)) 3904 return true; 3905 3906 if (!Val0->getType()->isAggregateType()) 3907 return Error(Loc0, "insertvalue operand must be aggregate type"); 3908 3909 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices)) 3910 return Error(Loc0, "invalid indices for insertvalue"); 3911 Inst = InsertValueInst::Create(Val0, Val1, Indices); 3912 return AteExtraComma ? InstExtraComma : InstNormal; 3913} 3914 3915//===----------------------------------------------------------------------===// 3916// Embedded metadata. 3917//===----------------------------------------------------------------------===// 3918 3919/// ParseMDNodeVector 3920/// ::= Element (',' Element)* 3921/// Element 3922/// ::= 'null' | TypeAndValue 3923bool LLParser::ParseMDNodeVector(SmallVectorImpl<Value*> &Elts, 3924 PerFunctionState *PFS) { 3925 // Check for an empty list. 3926 if (Lex.getKind() == lltok::rbrace) 3927 return false; 3928 3929 do { 3930 // Null is a special case since it is typeless. 3931 if (EatIfPresent(lltok::kw_null)) { 3932 Elts.push_back(0); 3933 continue; 3934 } 3935 3936 Value *V = 0; 3937 if (ParseTypeAndValue(V, PFS)) return true; 3938 Elts.push_back(V); 3939 } while (EatIfPresent(lltok::comma)); 3940 3941 return false; 3942} 3943