LLParser.cpp revision fbe910e7f432682457a7b3b9319f618dd66ddcd4
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 return false; 124} 125 126bool LLParser::ResolveForwardRefBlockAddresses(Function *TheFn, 127 std::vector<std::pair<ValID, GlobalValue*> > &Refs, 128 PerFunctionState *PFS) { 129 // Loop over all the references, resolving them. 130 for (unsigned i = 0, e = Refs.size(); i != e; ++i) { 131 BasicBlock *Res; 132 if (PFS) { 133 if (Refs[i].first.Kind == ValID::t_LocalName) 134 Res = PFS->GetBB(Refs[i].first.StrVal, Refs[i].first.Loc); 135 else 136 Res = PFS->GetBB(Refs[i].first.UIntVal, Refs[i].first.Loc); 137 } else if (Refs[i].first.Kind == ValID::t_LocalID) { 138 return Error(Refs[i].first.Loc, 139 "cannot take address of numeric label after the function is defined"); 140 } else { 141 Res = dyn_cast_or_null<BasicBlock>( 142 TheFn->getValueSymbolTable().lookup(Refs[i].first.StrVal)); 143 } 144 145 if (Res == 0) 146 return Error(Refs[i].first.Loc, 147 "referenced value is not a basic block"); 148 149 // Get the BlockAddress for this and update references to use it. 150 BlockAddress *BA = BlockAddress::get(TheFn, Res); 151 Refs[i].second->replaceAllUsesWith(BA); 152 Refs[i].second->eraseFromParent(); 153 } 154 return false; 155} 156 157 158//===----------------------------------------------------------------------===// 159// Top-Level Entities 160//===----------------------------------------------------------------------===// 161 162bool LLParser::ParseTopLevelEntities() { 163 while (1) { 164 switch (Lex.getKind()) { 165 default: return TokError("expected top-level entity"); 166 case lltok::Eof: return false; 167 case lltok::kw_declare: if (ParseDeclare()) return true; break; 168 case lltok::kw_define: if (ParseDefine()) return true; break; 169 case lltok::kw_module: if (ParseModuleAsm()) return true; break; 170 case lltok::kw_target: if (ParseTargetDefinition()) return true; break; 171 case lltok::kw_deplibs: if (ParseDepLibs()) return true; break; 172 case lltok::LocalVarID: if (ParseUnnamedType()) return true; break; 173 case lltok::LocalVar: if (ParseNamedType()) return true; break; 174 case lltok::GlobalID: if (ParseUnnamedGlobal()) return true; break; 175 case lltok::GlobalVar: if (ParseNamedGlobal()) return true; break; 176 case lltok::exclaim: if (ParseStandaloneMetadata()) return true; break; 177 case lltok::MetadataVar: if (ParseNamedMetadata()) return true; break; 178 179 // The Global variable production with no name can have many different 180 // optional leading prefixes, the production is: 181 // GlobalVar ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 182 // OptionalAddrSpace OptionalUnNammedAddr 183 // ('constant'|'global') ... 184 case lltok::kw_private: // OptionalLinkage 185 case lltok::kw_linker_private: // OptionalLinkage 186 case lltok::kw_linker_private_weak: // OptionalLinkage 187 case lltok::kw_linker_private_weak_def_auto: // OptionalLinkage 188 case lltok::kw_internal: // OptionalLinkage 189 case lltok::kw_weak: // OptionalLinkage 190 case lltok::kw_weak_odr: // OptionalLinkage 191 case lltok::kw_linkonce: // OptionalLinkage 192 case lltok::kw_linkonce_odr: // OptionalLinkage 193 case lltok::kw_appending: // OptionalLinkage 194 case lltok::kw_dllexport: // OptionalLinkage 195 case lltok::kw_common: // OptionalLinkage 196 case lltok::kw_dllimport: // OptionalLinkage 197 case lltok::kw_extern_weak: // OptionalLinkage 198 case lltok::kw_external: { // OptionalLinkage 199 unsigned Linkage, Visibility; 200 if (ParseOptionalLinkage(Linkage) || 201 ParseOptionalVisibility(Visibility) || 202 ParseGlobal("", SMLoc(), Linkage, true, Visibility)) 203 return true; 204 break; 205 } 206 case lltok::kw_default: // OptionalVisibility 207 case lltok::kw_hidden: // OptionalVisibility 208 case lltok::kw_protected: { // OptionalVisibility 209 unsigned Visibility; 210 if (ParseOptionalVisibility(Visibility) || 211 ParseGlobal("", SMLoc(), 0, false, Visibility)) 212 return true; 213 break; 214 } 215 216 case lltok::kw_thread_local: // OptionalThreadLocal 217 case lltok::kw_addrspace: // OptionalAddrSpace 218 case lltok::kw_constant: // GlobalType 219 case lltok::kw_global: // GlobalType 220 if (ParseGlobal("", SMLoc(), 0, false, 0)) return true; 221 break; 222 } 223 } 224} 225 226 227/// toplevelentity 228/// ::= 'module' 'asm' STRINGCONSTANT 229bool LLParser::ParseModuleAsm() { 230 assert(Lex.getKind() == lltok::kw_module); 231 Lex.Lex(); 232 233 std::string AsmStr; 234 if (ParseToken(lltok::kw_asm, "expected 'module asm'") || 235 ParseStringConstant(AsmStr)) return true; 236 237 M->appendModuleInlineAsm(AsmStr); 238 return false; 239} 240 241/// toplevelentity 242/// ::= 'target' 'triple' '=' STRINGCONSTANT 243/// ::= 'target' 'datalayout' '=' STRINGCONSTANT 244bool LLParser::ParseTargetDefinition() { 245 assert(Lex.getKind() == lltok::kw_target); 246 std::string Str; 247 switch (Lex.Lex()) { 248 default: return TokError("unknown target property"); 249 case lltok::kw_triple: 250 Lex.Lex(); 251 if (ParseToken(lltok::equal, "expected '=' after target triple") || 252 ParseStringConstant(Str)) 253 return true; 254 M->setTargetTriple(Str); 255 return false; 256 case lltok::kw_datalayout: 257 Lex.Lex(); 258 if (ParseToken(lltok::equal, "expected '=' after target datalayout") || 259 ParseStringConstant(Str)) 260 return true; 261 M->setDataLayout(Str); 262 return false; 263 } 264} 265 266/// toplevelentity 267/// ::= 'deplibs' '=' '[' ']' 268/// ::= 'deplibs' '=' '[' STRINGCONSTANT (',' STRINGCONSTANT)* ']' 269bool LLParser::ParseDepLibs() { 270 assert(Lex.getKind() == lltok::kw_deplibs); 271 Lex.Lex(); 272 if (ParseToken(lltok::equal, "expected '=' after deplibs") || 273 ParseToken(lltok::lsquare, "expected '=' after deplibs")) 274 return true; 275 276 if (EatIfPresent(lltok::rsquare)) 277 return false; 278 279 std::string Str; 280 if (ParseStringConstant(Str)) return true; 281 M->addLibrary(Str); 282 283 while (EatIfPresent(lltok::comma)) { 284 if (ParseStringConstant(Str)) return true; 285 M->addLibrary(Str); 286 } 287 288 return ParseToken(lltok::rsquare, "expected ']' at end of list"); 289} 290 291/// ParseUnnamedType: 292/// ::= LocalVarID '=' 'type' type 293bool LLParser::ParseUnnamedType() { 294 LocTy TypeLoc = Lex.getLoc(); 295 unsigned TypeID = Lex.getUIntVal(); 296 Lex.Lex(); // eat LocalVarID; 297 298 if (ParseToken(lltok::equal, "expected '=' after name") || 299 ParseToken(lltok::kw_type, "expected 'type' after '='")) 300 return true; 301 302 if (TypeID >= NumberedTypes.size()) 303 NumberedTypes.resize(TypeID+1); 304 305 Type *Result = 0; 306 if (ParseStructDefinition(TypeLoc, "", 307 NumberedTypes[TypeID], Result)) return true; 308 309 if (!isa<StructType>(Result)) { 310 std::pair<Type*, LocTy> &Entry = NumberedTypes[TypeID]; 311 if (Entry.first) 312 return Error(TypeLoc, "non-struct types may not be recursive"); 313 Entry.first = Result; 314 Entry.second = SMLoc(); 315 } 316 317 return false; 318} 319 320 321/// toplevelentity 322/// ::= LocalVar '=' 'type' type 323bool LLParser::ParseNamedType() { 324 std::string Name = Lex.getStrVal(); 325 LocTy NameLoc = Lex.getLoc(); 326 Lex.Lex(); // eat LocalVar. 327 328 if (ParseToken(lltok::equal, "expected '=' after name") || 329 ParseToken(lltok::kw_type, "expected 'type' after name")) 330 return true; 331 332 Type *Result = 0; 333 if (ParseStructDefinition(NameLoc, Name, 334 NamedTypes[Name], Result)) return true; 335 336 if (!isa<StructType>(Result)) { 337 std::pair<Type*, LocTy> &Entry = NamedTypes[Name]; 338 if (Entry.first) 339 return Error(NameLoc, "non-struct types may not be recursive"); 340 Entry.first = Result; 341 Entry.second = SMLoc(); 342 } 343 344 return false; 345} 346 347 348/// toplevelentity 349/// ::= 'declare' FunctionHeader 350bool LLParser::ParseDeclare() { 351 assert(Lex.getKind() == lltok::kw_declare); 352 Lex.Lex(); 353 354 Function *F; 355 return ParseFunctionHeader(F, false); 356} 357 358/// toplevelentity 359/// ::= 'define' FunctionHeader '{' ... 360bool LLParser::ParseDefine() { 361 assert(Lex.getKind() == lltok::kw_define); 362 Lex.Lex(); 363 364 Function *F; 365 return ParseFunctionHeader(F, true) || 366 ParseFunctionBody(*F); 367} 368 369/// ParseGlobalType 370/// ::= 'constant' 371/// ::= 'global' 372bool LLParser::ParseGlobalType(bool &IsConstant) { 373 if (Lex.getKind() == lltok::kw_constant) 374 IsConstant = true; 375 else if (Lex.getKind() == lltok::kw_global) 376 IsConstant = false; 377 else { 378 IsConstant = false; 379 return TokError("expected 'global' or 'constant'"); 380 } 381 Lex.Lex(); 382 return false; 383} 384 385/// ParseUnnamedGlobal: 386/// OptionalVisibility ALIAS ... 387/// OptionalLinkage OptionalVisibility ... -> global variable 388/// GlobalID '=' OptionalVisibility ALIAS ... 389/// GlobalID '=' OptionalLinkage OptionalVisibility ... -> global variable 390bool LLParser::ParseUnnamedGlobal() { 391 unsigned VarID = NumberedVals.size(); 392 std::string Name; 393 LocTy NameLoc = Lex.getLoc(); 394 395 // Handle the GlobalID form. 396 if (Lex.getKind() == lltok::GlobalID) { 397 if (Lex.getUIntVal() != VarID) 398 return Error(Lex.getLoc(), "variable expected to be numbered '%" + 399 Twine(VarID) + "'"); 400 Lex.Lex(); // eat GlobalID; 401 402 if (ParseToken(lltok::equal, "expected '=' after name")) 403 return true; 404 } 405 406 bool HasLinkage; 407 unsigned Linkage, Visibility; 408 if (ParseOptionalLinkage(Linkage, HasLinkage) || 409 ParseOptionalVisibility(Visibility)) 410 return true; 411 412 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 413 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 414 return ParseAlias(Name, NameLoc, Visibility); 415} 416 417/// ParseNamedGlobal: 418/// GlobalVar '=' OptionalVisibility ALIAS ... 419/// GlobalVar '=' OptionalLinkage OptionalVisibility ... -> global variable 420bool LLParser::ParseNamedGlobal() { 421 assert(Lex.getKind() == lltok::GlobalVar); 422 LocTy NameLoc = Lex.getLoc(); 423 std::string Name = Lex.getStrVal(); 424 Lex.Lex(); 425 426 bool HasLinkage; 427 unsigned Linkage, Visibility; 428 if (ParseToken(lltok::equal, "expected '=' in global variable") || 429 ParseOptionalLinkage(Linkage, HasLinkage) || 430 ParseOptionalVisibility(Visibility)) 431 return true; 432 433 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 434 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 435 return ParseAlias(Name, NameLoc, Visibility); 436} 437 438// MDString: 439// ::= '!' STRINGCONSTANT 440bool LLParser::ParseMDString(MDString *&Result) { 441 std::string Str; 442 if (ParseStringConstant(Str)) return true; 443 Result = MDString::get(Context, Str); 444 return false; 445} 446 447// MDNode: 448// ::= '!' MDNodeNumber 449// 450/// This version of ParseMDNodeID returns the slot number and null in the case 451/// of a forward reference. 452bool LLParser::ParseMDNodeID(MDNode *&Result, unsigned &SlotNo) { 453 // !{ ..., !42, ... } 454 if (ParseUInt32(SlotNo)) return true; 455 456 // Check existing MDNode. 457 if (SlotNo < NumberedMetadata.size() && NumberedMetadata[SlotNo] != 0) 458 Result = NumberedMetadata[SlotNo]; 459 else 460 Result = 0; 461 return false; 462} 463 464bool LLParser::ParseMDNodeID(MDNode *&Result) { 465 // !{ ..., !42, ... } 466 unsigned MID = 0; 467 if (ParseMDNodeID(Result, MID)) return true; 468 469 // If not a forward reference, just return it now. 470 if (Result) return false; 471 472 // Otherwise, create MDNode forward reference. 473 MDNode *FwdNode = MDNode::getTemporary(Context, ArrayRef<Value*>()); 474 ForwardRefMDNodes[MID] = std::make_pair(FwdNode, Lex.getLoc()); 475 476 if (NumberedMetadata.size() <= MID) 477 NumberedMetadata.resize(MID+1); 478 NumberedMetadata[MID] = FwdNode; 479 Result = FwdNode; 480 return false; 481} 482 483/// ParseNamedMetadata: 484/// !foo = !{ !1, !2 } 485bool LLParser::ParseNamedMetadata() { 486 assert(Lex.getKind() == lltok::MetadataVar); 487 std::string Name = Lex.getStrVal(); 488 Lex.Lex(); 489 490 if (ParseToken(lltok::equal, "expected '=' here") || 491 ParseToken(lltok::exclaim, "Expected '!' here") || 492 ParseToken(lltok::lbrace, "Expected '{' here")) 493 return true; 494 495 NamedMDNode *NMD = M->getOrInsertNamedMetadata(Name); 496 if (Lex.getKind() != lltok::rbrace) 497 do { 498 if (ParseToken(lltok::exclaim, "Expected '!' here")) 499 return true; 500 501 MDNode *N = 0; 502 if (ParseMDNodeID(N)) return true; 503 NMD->addOperand(N); 504 } while (EatIfPresent(lltok::comma)); 505 506 if (ParseToken(lltok::rbrace, "expected end of metadata node")) 507 return true; 508 509 return false; 510} 511 512/// ParseStandaloneMetadata: 513/// !42 = !{...} 514bool LLParser::ParseStandaloneMetadata() { 515 assert(Lex.getKind() == lltok::exclaim); 516 Lex.Lex(); 517 unsigned MetadataID = 0; 518 519 LocTy TyLoc; 520 Type *Ty = 0; 521 SmallVector<Value *, 16> Elts; 522 if (ParseUInt32(MetadataID) || 523 ParseToken(lltok::equal, "expected '=' here") || 524 ParseType(Ty, TyLoc) || 525 ParseToken(lltok::exclaim, "Expected '!' here") || 526 ParseToken(lltok::lbrace, "Expected '{' here") || 527 ParseMDNodeVector(Elts, NULL) || 528 ParseToken(lltok::rbrace, "expected end of metadata node")) 529 return true; 530 531 MDNode *Init = MDNode::get(Context, Elts); 532 533 // See if this was forward referenced, if so, handle it. 534 std::map<unsigned, std::pair<TrackingVH<MDNode>, LocTy> >::iterator 535 FI = ForwardRefMDNodes.find(MetadataID); 536 if (FI != ForwardRefMDNodes.end()) { 537 MDNode *Temp = FI->second.first; 538 Temp->replaceAllUsesWith(Init); 539 MDNode::deleteTemporary(Temp); 540 ForwardRefMDNodes.erase(FI); 541 542 assert(NumberedMetadata[MetadataID] == Init && "Tracking VH didn't work"); 543 } else { 544 if (MetadataID >= NumberedMetadata.size()) 545 NumberedMetadata.resize(MetadataID+1); 546 547 if (NumberedMetadata[MetadataID] != 0) 548 return TokError("Metadata id is already used"); 549 NumberedMetadata[MetadataID] = Init; 550 } 551 552 return false; 553} 554 555/// ParseAlias: 556/// ::= GlobalVar '=' OptionalVisibility 'alias' OptionalLinkage Aliasee 557/// Aliasee 558/// ::= TypeAndValue 559/// ::= 'bitcast' '(' TypeAndValue 'to' Type ')' 560/// ::= 'getelementptr' 'inbounds'? '(' ... ')' 561/// 562/// Everything through visibility has already been parsed. 563/// 564bool LLParser::ParseAlias(const std::string &Name, LocTy NameLoc, 565 unsigned Visibility) { 566 assert(Lex.getKind() == lltok::kw_alias); 567 Lex.Lex(); 568 unsigned Linkage; 569 LocTy LinkageLoc = Lex.getLoc(); 570 if (ParseOptionalLinkage(Linkage)) 571 return true; 572 573 if (Linkage != GlobalValue::ExternalLinkage && 574 Linkage != GlobalValue::WeakAnyLinkage && 575 Linkage != GlobalValue::WeakODRLinkage && 576 Linkage != GlobalValue::InternalLinkage && 577 Linkage != GlobalValue::PrivateLinkage && 578 Linkage != GlobalValue::LinkerPrivateLinkage && 579 Linkage != GlobalValue::LinkerPrivateWeakLinkage && 580 Linkage != GlobalValue::LinkerPrivateWeakDefAutoLinkage) 581 return Error(LinkageLoc, "invalid linkage type for alias"); 582 583 Constant *Aliasee; 584 LocTy AliaseeLoc = Lex.getLoc(); 585 if (Lex.getKind() != lltok::kw_bitcast && 586 Lex.getKind() != lltok::kw_getelementptr) { 587 if (ParseGlobalTypeAndValue(Aliasee)) return true; 588 } else { 589 // The bitcast dest type is not present, it is implied by the dest type. 590 ValID ID; 591 if (ParseValID(ID)) return true; 592 if (ID.Kind != ValID::t_Constant) 593 return Error(AliaseeLoc, "invalid aliasee"); 594 Aliasee = ID.ConstantVal; 595 } 596 597 if (!Aliasee->getType()->isPointerTy()) 598 return Error(AliaseeLoc, "alias must have pointer type"); 599 600 // Okay, create the alias but do not insert it into the module yet. 601 GlobalAlias* GA = new GlobalAlias(Aliasee->getType(), 602 (GlobalValue::LinkageTypes)Linkage, Name, 603 Aliasee); 604 GA->setVisibility((GlobalValue::VisibilityTypes)Visibility); 605 606 // See if this value already exists in the symbol table. If so, it is either 607 // a redefinition or a definition of a forward reference. 608 if (GlobalValue *Val = M->getNamedValue(Name)) { 609 // See if this was a redefinition. If so, there is no entry in 610 // ForwardRefVals. 611 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 612 I = ForwardRefVals.find(Name); 613 if (I == ForwardRefVals.end()) 614 return Error(NameLoc, "redefinition of global named '@" + Name + "'"); 615 616 // Otherwise, this was a definition of forward ref. Verify that types 617 // agree. 618 if (Val->getType() != GA->getType()) 619 return Error(NameLoc, 620 "forward reference and definition of alias have different types"); 621 622 // If they agree, just RAUW the old value with the alias and remove the 623 // forward ref info. 624 Val->replaceAllUsesWith(GA); 625 Val->eraseFromParent(); 626 ForwardRefVals.erase(I); 627 } 628 629 // Insert into the module, we know its name won't collide now. 630 M->getAliasList().push_back(GA); 631 assert(GA->getName() == Name && "Should not be a name conflict!"); 632 633 return false; 634} 635 636/// ParseGlobal 637/// ::= GlobalVar '=' OptionalLinkage OptionalVisibility OptionalThreadLocal 638/// OptionalAddrSpace OptionalUnNammedAddr GlobalType Type Const 639/// ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 640/// OptionalAddrSpace OptionalUnNammedAddr GlobalType Type Const 641/// 642/// Everything through visibility has been parsed already. 643/// 644bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc, 645 unsigned Linkage, bool HasLinkage, 646 unsigned Visibility) { 647 unsigned AddrSpace; 648 bool ThreadLocal, IsConstant, UnnamedAddr; 649 LocTy UnnamedAddrLoc; 650 LocTy TyLoc; 651 652 Type *Ty = 0; 653 if (ParseOptionalToken(lltok::kw_thread_local, ThreadLocal) || 654 ParseOptionalAddrSpace(AddrSpace) || 655 ParseOptionalToken(lltok::kw_unnamed_addr, UnnamedAddr, 656 &UnnamedAddrLoc) || 657 ParseGlobalType(IsConstant) || 658 ParseType(Ty, TyLoc)) 659 return true; 660 661 // If the linkage is specified and is external, then no initializer is 662 // present. 663 Constant *Init = 0; 664 if (!HasLinkage || (Linkage != GlobalValue::DLLImportLinkage && 665 Linkage != GlobalValue::ExternalWeakLinkage && 666 Linkage != GlobalValue::ExternalLinkage)) { 667 if (ParseGlobalValue(Ty, Init)) 668 return true; 669 } 670 671 if (Ty->isFunctionTy() || Ty->isLabelTy()) 672 return Error(TyLoc, "invalid type for global variable"); 673 674 GlobalVariable *GV = 0; 675 676 // See if the global was forward referenced, if so, use the global. 677 if (!Name.empty()) { 678 if (GlobalValue *GVal = M->getNamedValue(Name)) { 679 if (!ForwardRefVals.erase(Name) || !isa<GlobalValue>(GVal)) 680 return Error(NameLoc, "redefinition of global '@" + Name + "'"); 681 GV = cast<GlobalVariable>(GVal); 682 } 683 } else { 684 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 685 I = ForwardRefValIDs.find(NumberedVals.size()); 686 if (I != ForwardRefValIDs.end()) { 687 GV = cast<GlobalVariable>(I->second.first); 688 ForwardRefValIDs.erase(I); 689 } 690 } 691 692 if (GV == 0) { 693 GV = new GlobalVariable(*M, Ty, false, GlobalValue::ExternalLinkage, 0, 694 Name, 0, false, AddrSpace); 695 } else { 696 if (GV->getType()->getElementType() != Ty) 697 return Error(TyLoc, 698 "forward reference and definition of global have different types"); 699 700 // Move the forward-reference to the correct spot in the module. 701 M->getGlobalList().splice(M->global_end(), M->getGlobalList(), GV); 702 } 703 704 if (Name.empty()) 705 NumberedVals.push_back(GV); 706 707 // Set the parsed properties on the global. 708 if (Init) 709 GV->setInitializer(Init); 710 GV->setConstant(IsConstant); 711 GV->setLinkage((GlobalValue::LinkageTypes)Linkage); 712 GV->setVisibility((GlobalValue::VisibilityTypes)Visibility); 713 GV->setThreadLocal(ThreadLocal); 714 GV->setUnnamedAddr(UnnamedAddr); 715 716 // Parse attributes on the global. 717 while (Lex.getKind() == lltok::comma) { 718 Lex.Lex(); 719 720 if (Lex.getKind() == lltok::kw_section) { 721 Lex.Lex(); 722 GV->setSection(Lex.getStrVal()); 723 if (ParseToken(lltok::StringConstant, "expected global section string")) 724 return true; 725 } else if (Lex.getKind() == lltok::kw_align) { 726 unsigned Alignment; 727 if (ParseOptionalAlignment(Alignment)) return true; 728 GV->setAlignment(Alignment); 729 } else { 730 TokError("unknown global variable property!"); 731 } 732 } 733 734 return false; 735} 736 737 738//===----------------------------------------------------------------------===// 739// GlobalValue Reference/Resolution Routines. 740//===----------------------------------------------------------------------===// 741 742/// GetGlobalVal - Get a value with the specified name or ID, creating a 743/// forward reference record if needed. This can return null if the value 744/// exists but does not have the right type. 745GlobalValue *LLParser::GetGlobalVal(const std::string &Name, Type *Ty, 746 LocTy Loc) { 747 PointerType *PTy = dyn_cast<PointerType>(Ty); 748 if (PTy == 0) { 749 Error(Loc, "global variable reference must have pointer type"); 750 return 0; 751 } 752 753 // Look this name up in the normal function symbol table. 754 GlobalValue *Val = 755 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name)); 756 757 // If this is a forward reference for the value, see if we already created a 758 // forward ref record. 759 if (Val == 0) { 760 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 761 I = ForwardRefVals.find(Name); 762 if (I != ForwardRefVals.end()) 763 Val = I->second.first; 764 } 765 766 // If we have the value in the symbol table or fwd-ref table, return it. 767 if (Val) { 768 if (Val->getType() == Ty) return Val; 769 Error(Loc, "'@" + Name + "' defined with type '" + 770 getTypeString(Val->getType()) + "'"); 771 return 0; 772 } 773 774 // Otherwise, create a new forward reference for this value and remember it. 775 GlobalValue *FwdVal; 776 if (FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) 777 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M); 778 else 779 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 780 GlobalValue::ExternalWeakLinkage, 0, Name); 781 782 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 783 return FwdVal; 784} 785 786GlobalValue *LLParser::GetGlobalVal(unsigned ID, Type *Ty, LocTy Loc) { 787 PointerType *PTy = dyn_cast<PointerType>(Ty); 788 if (PTy == 0) { 789 Error(Loc, "global variable reference must have pointer type"); 790 return 0; 791 } 792 793 GlobalValue *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 794 795 // If this is a forward reference for the value, see if we already created a 796 // forward ref record. 797 if (Val == 0) { 798 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 799 I = ForwardRefValIDs.find(ID); 800 if (I != ForwardRefValIDs.end()) 801 Val = I->second.first; 802 } 803 804 // If we have the value in the symbol table or fwd-ref table, return it. 805 if (Val) { 806 if (Val->getType() == Ty) return Val; 807 Error(Loc, "'@" + Twine(ID) + "' defined with type '" + 808 getTypeString(Val->getType()) + "'"); 809 return 0; 810 } 811 812 // Otherwise, create a new forward reference for this value and remember it. 813 GlobalValue *FwdVal; 814 if (FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) 815 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, "", M); 816 else 817 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 818 GlobalValue::ExternalWeakLinkage, 0, ""); 819 820 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 821 return FwdVal; 822} 823 824 825//===----------------------------------------------------------------------===// 826// Helper Routines. 827//===----------------------------------------------------------------------===// 828 829/// ParseToken - If the current token has the specified kind, eat it and return 830/// success. Otherwise, emit the specified error and return failure. 831bool LLParser::ParseToken(lltok::Kind T, const char *ErrMsg) { 832 if (Lex.getKind() != T) 833 return TokError(ErrMsg); 834 Lex.Lex(); 835 return false; 836} 837 838/// ParseStringConstant 839/// ::= StringConstant 840bool LLParser::ParseStringConstant(std::string &Result) { 841 if (Lex.getKind() != lltok::StringConstant) 842 return TokError("expected string constant"); 843 Result = Lex.getStrVal(); 844 Lex.Lex(); 845 return false; 846} 847 848/// ParseUInt32 849/// ::= uint32 850bool LLParser::ParseUInt32(unsigned &Val) { 851 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned()) 852 return TokError("expected integer"); 853 uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(0xFFFFFFFFULL+1); 854 if (Val64 != unsigned(Val64)) 855 return TokError("expected 32-bit integer (too large)"); 856 Val = Val64; 857 Lex.Lex(); 858 return false; 859} 860 861 862/// ParseOptionalAddrSpace 863/// := /*empty*/ 864/// := 'addrspace' '(' uint32 ')' 865bool LLParser::ParseOptionalAddrSpace(unsigned &AddrSpace) { 866 AddrSpace = 0; 867 if (!EatIfPresent(lltok::kw_addrspace)) 868 return false; 869 return ParseToken(lltok::lparen, "expected '(' in address space") || 870 ParseUInt32(AddrSpace) || 871 ParseToken(lltok::rparen, "expected ')' in address space"); 872} 873 874/// ParseOptionalAttrs - Parse a potentially empty attribute list. AttrKind 875/// indicates what kind of attribute list this is: 0: function arg, 1: result, 876/// 2: function attr. 877bool LLParser::ParseOptionalAttrs(unsigned &Attrs, unsigned AttrKind) { 878 Attrs = Attribute::None; 879 LocTy AttrLoc = Lex.getLoc(); 880 881 while (1) { 882 switch (Lex.getKind()) { 883 default: // End of attributes. 884 if (AttrKind != 2 && (Attrs & Attribute::FunctionOnly)) 885 return Error(AttrLoc, "invalid use of function-only attribute"); 886 887 // As a hack, we allow "align 2" on functions as a synonym for 888 // "alignstack 2". 889 if (AttrKind == 2 && 890 (Attrs & ~(Attribute::FunctionOnly | Attribute::Alignment))) 891 return Error(AttrLoc, "invalid use of attribute on a function"); 892 893 if (AttrKind != 0 && (Attrs & Attribute::ParameterOnly)) 894 return Error(AttrLoc, "invalid use of parameter-only attribute"); 895 896 return false; 897 case lltok::kw_zeroext: Attrs |= Attribute::ZExt; break; 898 case lltok::kw_signext: Attrs |= Attribute::SExt; break; 899 case lltok::kw_inreg: Attrs |= Attribute::InReg; break; 900 case lltok::kw_sret: Attrs |= Attribute::StructRet; break; 901 case lltok::kw_noalias: Attrs |= Attribute::NoAlias; break; 902 case lltok::kw_nocapture: Attrs |= Attribute::NoCapture; break; 903 case lltok::kw_byval: Attrs |= Attribute::ByVal; break; 904 case lltok::kw_nest: Attrs |= Attribute::Nest; break; 905 906 case lltok::kw_noreturn: Attrs |= Attribute::NoReturn; break; 907 case lltok::kw_nounwind: Attrs |= Attribute::NoUnwind; break; 908 case lltok::kw_uwtable: Attrs |= Attribute::UWTable; break; 909 case lltok::kw_returns_twice: Attrs |= Attribute::ReturnsTwice; break; 910 case lltok::kw_noinline: Attrs |= Attribute::NoInline; break; 911 case lltok::kw_readnone: Attrs |= Attribute::ReadNone; break; 912 case lltok::kw_readonly: Attrs |= Attribute::ReadOnly; break; 913 case lltok::kw_inlinehint: Attrs |= Attribute::InlineHint; break; 914 case lltok::kw_alwaysinline: Attrs |= Attribute::AlwaysInline; break; 915 case lltok::kw_optsize: Attrs |= Attribute::OptimizeForSize; break; 916 case lltok::kw_ssp: Attrs |= Attribute::StackProtect; break; 917 case lltok::kw_sspreq: Attrs |= Attribute::StackProtectReq; break; 918 case lltok::kw_noredzone: Attrs |= Attribute::NoRedZone; break; 919 case lltok::kw_noimplicitfloat: Attrs |= Attribute::NoImplicitFloat; break; 920 case lltok::kw_naked: Attrs |= Attribute::Naked; break; 921 case lltok::kw_nonlazybind: Attrs |= Attribute::NonLazyBind; break; 922 923 case lltok::kw_alignstack: { 924 unsigned Alignment; 925 if (ParseOptionalStackAlignment(Alignment)) 926 return true; 927 Attrs |= Attribute::constructStackAlignmentFromInt(Alignment); 928 continue; 929 } 930 931 case lltok::kw_align: { 932 unsigned Alignment; 933 if (ParseOptionalAlignment(Alignment)) 934 return true; 935 Attrs |= Attribute::constructAlignmentFromInt(Alignment); 936 continue; 937 } 938 939 } 940 Lex.Lex(); 941 } 942} 943 944/// ParseOptionalLinkage 945/// ::= /*empty*/ 946/// ::= 'private' 947/// ::= 'linker_private' 948/// ::= 'linker_private_weak' 949/// ::= 'linker_private_weak_def_auto' 950/// ::= 'internal' 951/// ::= 'weak' 952/// ::= 'weak_odr' 953/// ::= 'linkonce' 954/// ::= 'linkonce_odr' 955/// ::= 'available_externally' 956/// ::= 'appending' 957/// ::= 'dllexport' 958/// ::= 'common' 959/// ::= 'dllimport' 960/// ::= 'extern_weak' 961/// ::= 'external' 962bool LLParser::ParseOptionalLinkage(unsigned &Res, bool &HasLinkage) { 963 HasLinkage = false; 964 switch (Lex.getKind()) { 965 default: Res=GlobalValue::ExternalLinkage; return false; 966 case lltok::kw_private: Res = GlobalValue::PrivateLinkage; break; 967 case lltok::kw_linker_private: Res = GlobalValue::LinkerPrivateLinkage; break; 968 case lltok::kw_linker_private_weak: 969 Res = GlobalValue::LinkerPrivateWeakLinkage; 970 break; 971 case lltok::kw_linker_private_weak_def_auto: 972 Res = GlobalValue::LinkerPrivateWeakDefAutoLinkage; 973 break; 974 case lltok::kw_internal: Res = GlobalValue::InternalLinkage; break; 975 case lltok::kw_weak: Res = GlobalValue::WeakAnyLinkage; break; 976 case lltok::kw_weak_odr: Res = GlobalValue::WeakODRLinkage; break; 977 case lltok::kw_linkonce: Res = GlobalValue::LinkOnceAnyLinkage; break; 978 case lltok::kw_linkonce_odr: Res = GlobalValue::LinkOnceODRLinkage; break; 979 case lltok::kw_available_externally: 980 Res = GlobalValue::AvailableExternallyLinkage; 981 break; 982 case lltok::kw_appending: Res = GlobalValue::AppendingLinkage; break; 983 case lltok::kw_dllexport: Res = GlobalValue::DLLExportLinkage; break; 984 case lltok::kw_common: Res = GlobalValue::CommonLinkage; break; 985 case lltok::kw_dllimport: Res = GlobalValue::DLLImportLinkage; break; 986 case lltok::kw_extern_weak: Res = GlobalValue::ExternalWeakLinkage; break; 987 case lltok::kw_external: Res = GlobalValue::ExternalLinkage; break; 988 } 989 Lex.Lex(); 990 HasLinkage = true; 991 return false; 992} 993 994/// ParseOptionalVisibility 995/// ::= /*empty*/ 996/// ::= 'default' 997/// ::= 'hidden' 998/// ::= 'protected' 999/// 1000bool LLParser::ParseOptionalVisibility(unsigned &Res) { 1001 switch (Lex.getKind()) { 1002 default: Res = GlobalValue::DefaultVisibility; return false; 1003 case lltok::kw_default: Res = GlobalValue::DefaultVisibility; break; 1004 case lltok::kw_hidden: Res = GlobalValue::HiddenVisibility; break; 1005 case lltok::kw_protected: Res = GlobalValue::ProtectedVisibility; break; 1006 } 1007 Lex.Lex(); 1008 return false; 1009} 1010 1011/// ParseOptionalCallingConv 1012/// ::= /*empty*/ 1013/// ::= 'ccc' 1014/// ::= 'fastcc' 1015/// ::= 'coldcc' 1016/// ::= 'x86_stdcallcc' 1017/// ::= 'x86_fastcallcc' 1018/// ::= 'x86_thiscallcc' 1019/// ::= 'arm_apcscc' 1020/// ::= 'arm_aapcscc' 1021/// ::= 'arm_aapcs_vfpcc' 1022/// ::= 'msp430_intrcc' 1023/// ::= 'ptx_kernel' 1024/// ::= 'ptx_device' 1025/// ::= 'cc' UINT 1026/// 1027bool LLParser::ParseOptionalCallingConv(CallingConv::ID &CC) { 1028 switch (Lex.getKind()) { 1029 default: CC = CallingConv::C; return false; 1030 case lltok::kw_ccc: CC = CallingConv::C; break; 1031 case lltok::kw_fastcc: CC = CallingConv::Fast; break; 1032 case lltok::kw_coldcc: CC = CallingConv::Cold; break; 1033 case lltok::kw_x86_stdcallcc: CC = CallingConv::X86_StdCall; break; 1034 case lltok::kw_x86_fastcallcc: CC = CallingConv::X86_FastCall; break; 1035 case lltok::kw_x86_thiscallcc: CC = CallingConv::X86_ThisCall; break; 1036 case lltok::kw_arm_apcscc: CC = CallingConv::ARM_APCS; break; 1037 case lltok::kw_arm_aapcscc: CC = CallingConv::ARM_AAPCS; break; 1038 case lltok::kw_arm_aapcs_vfpcc:CC = CallingConv::ARM_AAPCS_VFP; break; 1039 case lltok::kw_msp430_intrcc: CC = CallingConv::MSP430_INTR; break; 1040 case lltok::kw_ptx_kernel: CC = CallingConv::PTX_Kernel; break; 1041 case lltok::kw_ptx_device: CC = CallingConv::PTX_Device; break; 1042 case lltok::kw_cc: { 1043 unsigned ArbitraryCC; 1044 Lex.Lex(); 1045 if (ParseUInt32(ArbitraryCC)) { 1046 return true; 1047 } else 1048 CC = static_cast<CallingConv::ID>(ArbitraryCC); 1049 return false; 1050 } 1051 break; 1052 } 1053 1054 Lex.Lex(); 1055 return false; 1056} 1057 1058/// ParseInstructionMetadata 1059/// ::= !dbg !42 (',' !dbg !57)* 1060bool LLParser::ParseInstructionMetadata(Instruction *Inst, 1061 PerFunctionState *PFS) { 1062 do { 1063 if (Lex.getKind() != lltok::MetadataVar) 1064 return TokError("expected metadata after comma"); 1065 1066 std::string Name = Lex.getStrVal(); 1067 unsigned MDK = M->getMDKindID(Name.c_str()); 1068 Lex.Lex(); 1069 1070 MDNode *Node; 1071 SMLoc Loc = Lex.getLoc(); 1072 1073 if (ParseToken(lltok::exclaim, "expected '!' here")) 1074 return true; 1075 1076 // This code is similar to that of ParseMetadataValue, however it needs to 1077 // have special-case code for a forward reference; see the comments on 1078 // ForwardRefInstMetadata for details. Also, MDStrings are not supported 1079 // at the top level here. 1080 if (Lex.getKind() == lltok::lbrace) { 1081 ValID ID; 1082 if (ParseMetadataListValue(ID, PFS)) 1083 return true; 1084 assert(ID.Kind == ValID::t_MDNode); 1085 Inst->setMetadata(MDK, ID.MDNodeVal); 1086 } else { 1087 unsigned NodeID = 0; 1088 if (ParseMDNodeID(Node, NodeID)) 1089 return true; 1090 if (Node) { 1091 // If we got the node, add it to the instruction. 1092 Inst->setMetadata(MDK, Node); 1093 } else { 1094 MDRef R = { Loc, MDK, NodeID }; 1095 // Otherwise, remember that this should be resolved later. 1096 ForwardRefInstMetadata[Inst].push_back(R); 1097 } 1098 } 1099 1100 // If this is the end of the list, we're done. 1101 } while (EatIfPresent(lltok::comma)); 1102 return false; 1103} 1104 1105/// ParseOptionalAlignment 1106/// ::= /* empty */ 1107/// ::= 'align' 4 1108bool LLParser::ParseOptionalAlignment(unsigned &Alignment) { 1109 Alignment = 0; 1110 if (!EatIfPresent(lltok::kw_align)) 1111 return false; 1112 LocTy AlignLoc = Lex.getLoc(); 1113 if (ParseUInt32(Alignment)) return true; 1114 if (!isPowerOf2_32(Alignment)) 1115 return Error(AlignLoc, "alignment is not a power of two"); 1116 if (Alignment > Value::MaximumAlignment) 1117 return Error(AlignLoc, "huge alignments are not supported yet"); 1118 return false; 1119} 1120 1121/// ParseOptionalCommaAlign 1122/// ::= 1123/// ::= ',' align 4 1124/// 1125/// This returns with AteExtraComma set to true if it ate an excess comma at the 1126/// end. 1127bool LLParser::ParseOptionalCommaAlign(unsigned &Alignment, 1128 bool &AteExtraComma) { 1129 AteExtraComma = false; 1130 while (EatIfPresent(lltok::comma)) { 1131 // Metadata at the end is an early exit. 1132 if (Lex.getKind() == lltok::MetadataVar) { 1133 AteExtraComma = true; 1134 return false; 1135 } 1136 1137 if (Lex.getKind() != lltok::kw_align) 1138 return Error(Lex.getLoc(), "expected metadata or 'align'"); 1139 1140 if (ParseOptionalAlignment(Alignment)) return true; 1141 } 1142 1143 return false; 1144} 1145 1146/// ParseScopeAndOrdering 1147/// if isAtomic: ::= 'singlethread'? AtomicOrdering 1148/// else: ::= 1149/// 1150/// This sets Scope and Ordering to the parsed values. 1151bool LLParser::ParseScopeAndOrdering(bool isAtomic, SynchronizationScope &Scope, 1152 AtomicOrdering &Ordering) { 1153 if (!isAtomic) 1154 return false; 1155 1156 Scope = CrossThread; 1157 if (EatIfPresent(lltok::kw_singlethread)) 1158 Scope = SingleThread; 1159 switch (Lex.getKind()) { 1160 default: return TokError("Expected ordering on atomic instruction"); 1161 case lltok::kw_unordered: Ordering = Unordered; break; 1162 case lltok::kw_monotonic: Ordering = Monotonic; break; 1163 case lltok::kw_acquire: Ordering = Acquire; break; 1164 case lltok::kw_release: Ordering = Release; break; 1165 case lltok::kw_acq_rel: Ordering = AcquireRelease; break; 1166 case lltok::kw_seq_cst: Ordering = SequentiallyConsistent; break; 1167 } 1168 Lex.Lex(); 1169 return false; 1170} 1171 1172/// ParseOptionalStackAlignment 1173/// ::= /* empty */ 1174/// ::= 'alignstack' '(' 4 ')' 1175bool LLParser::ParseOptionalStackAlignment(unsigned &Alignment) { 1176 Alignment = 0; 1177 if (!EatIfPresent(lltok::kw_alignstack)) 1178 return false; 1179 LocTy ParenLoc = Lex.getLoc(); 1180 if (!EatIfPresent(lltok::lparen)) 1181 return Error(ParenLoc, "expected '('"); 1182 LocTy AlignLoc = Lex.getLoc(); 1183 if (ParseUInt32(Alignment)) return true; 1184 ParenLoc = Lex.getLoc(); 1185 if (!EatIfPresent(lltok::rparen)) 1186 return Error(ParenLoc, "expected ')'"); 1187 if (!isPowerOf2_32(Alignment)) 1188 return Error(AlignLoc, "stack alignment is not a power of two"); 1189 return false; 1190} 1191 1192/// ParseIndexList - This parses the index list for an insert/extractvalue 1193/// instruction. This sets AteExtraComma in the case where we eat an extra 1194/// comma at the end of the line and find that it is followed by metadata. 1195/// Clients that don't allow metadata can call the version of this function that 1196/// only takes one argument. 1197/// 1198/// ParseIndexList 1199/// ::= (',' uint32)+ 1200/// 1201bool LLParser::ParseIndexList(SmallVectorImpl<unsigned> &Indices, 1202 bool &AteExtraComma) { 1203 AteExtraComma = false; 1204 1205 if (Lex.getKind() != lltok::comma) 1206 return TokError("expected ',' as start of index list"); 1207 1208 while (EatIfPresent(lltok::comma)) { 1209 if (Lex.getKind() == lltok::MetadataVar) { 1210 AteExtraComma = true; 1211 return false; 1212 } 1213 unsigned Idx = 0; 1214 if (ParseUInt32(Idx)) return true; 1215 Indices.push_back(Idx); 1216 } 1217 1218 return false; 1219} 1220 1221//===----------------------------------------------------------------------===// 1222// Type Parsing. 1223//===----------------------------------------------------------------------===// 1224 1225/// ParseType - Parse a type. 1226bool LLParser::ParseType(Type *&Result, bool AllowVoid) { 1227 SMLoc TypeLoc = Lex.getLoc(); 1228 switch (Lex.getKind()) { 1229 default: 1230 return TokError("expected type"); 1231 case lltok::Type: 1232 // Type ::= 'float' | 'void' (etc) 1233 Result = Lex.getTyVal(); 1234 Lex.Lex(); 1235 break; 1236 case lltok::lbrace: 1237 // Type ::= StructType 1238 if (ParseAnonStructType(Result, false)) 1239 return true; 1240 break; 1241 case lltok::lsquare: 1242 // Type ::= '[' ... ']' 1243 Lex.Lex(); // eat the lsquare. 1244 if (ParseArrayVectorType(Result, false)) 1245 return true; 1246 break; 1247 case lltok::less: // Either vector or packed struct. 1248 // Type ::= '<' ... '>' 1249 Lex.Lex(); 1250 if (Lex.getKind() == lltok::lbrace) { 1251 if (ParseAnonStructType(Result, true) || 1252 ParseToken(lltok::greater, "expected '>' at end of packed struct")) 1253 return true; 1254 } else if (ParseArrayVectorType(Result, true)) 1255 return true; 1256 break; 1257 case lltok::LocalVar: { 1258 // Type ::= %foo 1259 std::pair<Type*, LocTy> &Entry = NamedTypes[Lex.getStrVal()]; 1260 1261 // If the type hasn't been defined yet, create a forward definition and 1262 // remember where that forward def'n was seen (in case it never is defined). 1263 if (Entry.first == 0) { 1264 Entry.first = StructType::create(Context, Lex.getStrVal()); 1265 Entry.second = Lex.getLoc(); 1266 } 1267 Result = Entry.first; 1268 Lex.Lex(); 1269 break; 1270 } 1271 1272 case lltok::LocalVarID: { 1273 // Type ::= %4 1274 if (Lex.getUIntVal() >= NumberedTypes.size()) 1275 NumberedTypes.resize(Lex.getUIntVal()+1); 1276 std::pair<Type*, LocTy> &Entry = NumberedTypes[Lex.getUIntVal()]; 1277 1278 // If the type hasn't been defined yet, create a forward definition and 1279 // remember where that forward def'n was seen (in case it never is defined). 1280 if (Entry.first == 0) { 1281 Entry.first = StructType::create(Context); 1282 Entry.second = Lex.getLoc(); 1283 } 1284 Result = Entry.first; 1285 Lex.Lex(); 1286 break; 1287 } 1288 } 1289 1290 // Parse the type suffixes. 1291 while (1) { 1292 switch (Lex.getKind()) { 1293 // End of type. 1294 default: 1295 if (!AllowVoid && Result->isVoidTy()) 1296 return Error(TypeLoc, "void type only allowed for function results"); 1297 return false; 1298 1299 // Type ::= Type '*' 1300 case lltok::star: 1301 if (Result->isLabelTy()) 1302 return TokError("basic block pointers are invalid"); 1303 if (Result->isVoidTy()) 1304 return TokError("pointers to void are invalid - use i8* instead"); 1305 if (!PointerType::isValidElementType(Result)) 1306 return TokError("pointer to this type is invalid"); 1307 Result = PointerType::getUnqual(Result); 1308 Lex.Lex(); 1309 break; 1310 1311 // Type ::= Type 'addrspace' '(' uint32 ')' '*' 1312 case lltok::kw_addrspace: { 1313 if (Result->isLabelTy()) 1314 return TokError("basic block pointers are invalid"); 1315 if (Result->isVoidTy()) 1316 return TokError("pointers to void are invalid; use i8* instead"); 1317 if (!PointerType::isValidElementType(Result)) 1318 return TokError("pointer to this type is invalid"); 1319 unsigned AddrSpace; 1320 if (ParseOptionalAddrSpace(AddrSpace) || 1321 ParseToken(lltok::star, "expected '*' in address space")) 1322 return true; 1323 1324 Result = PointerType::get(Result, AddrSpace); 1325 break; 1326 } 1327 1328 /// Types '(' ArgTypeListI ')' OptFuncAttrs 1329 case lltok::lparen: 1330 if (ParseFunctionType(Result)) 1331 return true; 1332 break; 1333 } 1334 } 1335} 1336 1337/// ParseParameterList 1338/// ::= '(' ')' 1339/// ::= '(' Arg (',' Arg)* ')' 1340/// Arg 1341/// ::= Type OptionalAttributes Value OptionalAttributes 1342bool LLParser::ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList, 1343 PerFunctionState &PFS) { 1344 if (ParseToken(lltok::lparen, "expected '(' in call")) 1345 return true; 1346 1347 while (Lex.getKind() != lltok::rparen) { 1348 // If this isn't the first argument, we need a comma. 1349 if (!ArgList.empty() && 1350 ParseToken(lltok::comma, "expected ',' in argument list")) 1351 return true; 1352 1353 // Parse the argument. 1354 LocTy ArgLoc; 1355 Type *ArgTy = 0; 1356 unsigned ArgAttrs1 = Attribute::None; 1357 unsigned ArgAttrs2 = Attribute::None; 1358 Value *V; 1359 if (ParseType(ArgTy, ArgLoc)) 1360 return true; 1361 1362 // Otherwise, handle normal operands. 1363 if (ParseOptionalAttrs(ArgAttrs1, 0) || ParseValue(ArgTy, V, PFS)) 1364 return true; 1365 ArgList.push_back(ParamInfo(ArgLoc, V, ArgAttrs1|ArgAttrs2)); 1366 } 1367 1368 Lex.Lex(); // Lex the ')'. 1369 return false; 1370} 1371 1372 1373 1374/// ParseArgumentList - Parse the argument list for a function type or function 1375/// prototype. 1376/// ::= '(' ArgTypeListI ')' 1377/// ArgTypeListI 1378/// ::= /*empty*/ 1379/// ::= '...' 1380/// ::= ArgTypeList ',' '...' 1381/// ::= ArgType (',' ArgType)* 1382/// 1383bool LLParser::ParseArgumentList(SmallVectorImpl<ArgInfo> &ArgList, 1384 bool &isVarArg){ 1385 isVarArg = false; 1386 assert(Lex.getKind() == lltok::lparen); 1387 Lex.Lex(); // eat the (. 1388 1389 if (Lex.getKind() == lltok::rparen) { 1390 // empty 1391 } else if (Lex.getKind() == lltok::dotdotdot) { 1392 isVarArg = true; 1393 Lex.Lex(); 1394 } else { 1395 LocTy TypeLoc = Lex.getLoc(); 1396 Type *ArgTy = 0; 1397 unsigned Attrs; 1398 std::string Name; 1399 1400 if (ParseType(ArgTy) || 1401 ParseOptionalAttrs(Attrs, 0)) return true; 1402 1403 if (ArgTy->isVoidTy()) 1404 return Error(TypeLoc, "argument can not have void type"); 1405 1406 if (Lex.getKind() == lltok::LocalVar) { 1407 Name = Lex.getStrVal(); 1408 Lex.Lex(); 1409 } 1410 1411 if (!FunctionType::isValidArgumentType(ArgTy)) 1412 return Error(TypeLoc, "invalid type for function argument"); 1413 1414 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1415 1416 while (EatIfPresent(lltok::comma)) { 1417 // Handle ... at end of arg list. 1418 if (EatIfPresent(lltok::dotdotdot)) { 1419 isVarArg = true; 1420 break; 1421 } 1422 1423 // Otherwise must be an argument type. 1424 TypeLoc = Lex.getLoc(); 1425 if (ParseType(ArgTy) || ParseOptionalAttrs(Attrs, 0)) return true; 1426 1427 if (ArgTy->isVoidTy()) 1428 return Error(TypeLoc, "argument can not have void type"); 1429 1430 if (Lex.getKind() == lltok::LocalVar) { 1431 Name = Lex.getStrVal(); 1432 Lex.Lex(); 1433 } else { 1434 Name = ""; 1435 } 1436 1437 if (!ArgTy->isFirstClassType()) 1438 return Error(TypeLoc, "invalid type for function argument"); 1439 1440 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1441 } 1442 } 1443 1444 return ParseToken(lltok::rparen, "expected ')' at end of argument list"); 1445} 1446 1447/// ParseFunctionType 1448/// ::= Type ArgumentList OptionalAttrs 1449bool LLParser::ParseFunctionType(Type *&Result) { 1450 assert(Lex.getKind() == lltok::lparen); 1451 1452 if (!FunctionType::isValidReturnType(Result)) 1453 return TokError("invalid function return type"); 1454 1455 SmallVector<ArgInfo, 8> ArgList; 1456 bool isVarArg; 1457 if (ParseArgumentList(ArgList, isVarArg)) 1458 return true; 1459 1460 // Reject names on the arguments lists. 1461 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 1462 if (!ArgList[i].Name.empty()) 1463 return Error(ArgList[i].Loc, "argument name invalid in function type"); 1464 if (ArgList[i].Attrs != 0) 1465 return Error(ArgList[i].Loc, 1466 "argument attributes invalid in function type"); 1467 } 1468 1469 SmallVector<Type*, 16> ArgListTy; 1470 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 1471 ArgListTy.push_back(ArgList[i].Ty); 1472 1473 Result = FunctionType::get(Result, ArgListTy, isVarArg); 1474 return false; 1475} 1476 1477/// ParseAnonStructType - Parse an anonymous struct type, which is inlined into 1478/// other structs. 1479bool LLParser::ParseAnonStructType(Type *&Result, bool Packed) { 1480 SmallVector<Type*, 8> Elts; 1481 if (ParseStructBody(Elts)) return true; 1482 1483 Result = StructType::get(Context, Elts, Packed); 1484 return false; 1485} 1486 1487/// ParseStructDefinition - Parse a struct in a 'type' definition. 1488bool LLParser::ParseStructDefinition(SMLoc TypeLoc, StringRef Name, 1489 std::pair<Type*, LocTy> &Entry, 1490 Type *&ResultTy) { 1491 // If the type was already defined, diagnose the redefinition. 1492 if (Entry.first && !Entry.second.isValid()) 1493 return Error(TypeLoc, "redefinition of type"); 1494 1495 // If we have opaque, just return without filling in the definition for the 1496 // struct. This counts as a definition as far as the .ll file goes. 1497 if (EatIfPresent(lltok::kw_opaque)) { 1498 // This type is being defined, so clear the location to indicate this. 1499 Entry.second = SMLoc(); 1500 1501 // If this type number has never been uttered, create it. 1502 if (Entry.first == 0) 1503 Entry.first = StructType::create(Context, Name); 1504 ResultTy = Entry.first; 1505 return false; 1506 } 1507 1508 // If the type starts with '<', then it is either a packed struct or a vector. 1509 bool isPacked = EatIfPresent(lltok::less); 1510 1511 // If we don't have a struct, then we have a random type alias, which we 1512 // accept for compatibility with old files. These types are not allowed to be 1513 // forward referenced and not allowed to be recursive. 1514 if (Lex.getKind() != lltok::lbrace) { 1515 if (Entry.first) 1516 return Error(TypeLoc, "forward references to non-struct type"); 1517 1518 ResultTy = 0; 1519 if (isPacked) 1520 return ParseArrayVectorType(ResultTy, true); 1521 return ParseType(ResultTy); 1522 } 1523 1524 // This type is being defined, so clear the location to indicate this. 1525 Entry.second = SMLoc(); 1526 1527 // If this type number has never been uttered, create it. 1528 if (Entry.first == 0) 1529 Entry.first = StructType::create(Context, Name); 1530 1531 StructType *STy = cast<StructType>(Entry.first); 1532 1533 SmallVector<Type*, 8> Body; 1534 if (ParseStructBody(Body) || 1535 (isPacked && ParseToken(lltok::greater, "expected '>' in packed struct"))) 1536 return true; 1537 1538 STy->setBody(Body, isPacked); 1539 ResultTy = STy; 1540 return false; 1541} 1542 1543 1544/// ParseStructType: Handles packed and unpacked types. </> parsed elsewhere. 1545/// StructType 1546/// ::= '{' '}' 1547/// ::= '{' Type (',' Type)* '}' 1548/// ::= '<' '{' '}' '>' 1549/// ::= '<' '{' Type (',' Type)* '}' '>' 1550bool LLParser::ParseStructBody(SmallVectorImpl<Type*> &Body) { 1551 assert(Lex.getKind() == lltok::lbrace); 1552 Lex.Lex(); // Consume the '{' 1553 1554 // Handle the empty struct. 1555 if (EatIfPresent(lltok::rbrace)) 1556 return false; 1557 1558 LocTy EltTyLoc = Lex.getLoc(); 1559 Type *Ty = 0; 1560 if (ParseType(Ty)) return true; 1561 Body.push_back(Ty); 1562 1563 if (!StructType::isValidElementType(Ty)) 1564 return Error(EltTyLoc, "invalid element type for struct"); 1565 1566 while (EatIfPresent(lltok::comma)) { 1567 EltTyLoc = Lex.getLoc(); 1568 if (ParseType(Ty)) return true; 1569 1570 if (!StructType::isValidElementType(Ty)) 1571 return Error(EltTyLoc, "invalid element type for struct"); 1572 1573 Body.push_back(Ty); 1574 } 1575 1576 return ParseToken(lltok::rbrace, "expected '}' at end of struct"); 1577} 1578 1579/// ParseArrayVectorType - Parse an array or vector type, assuming the first 1580/// token has already been consumed. 1581/// Type 1582/// ::= '[' APSINTVAL 'x' Types ']' 1583/// ::= '<' APSINTVAL 'x' Types '>' 1584bool LLParser::ParseArrayVectorType(Type *&Result, bool isVector) { 1585 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned() || 1586 Lex.getAPSIntVal().getBitWidth() > 64) 1587 return TokError("expected number in address space"); 1588 1589 LocTy SizeLoc = Lex.getLoc(); 1590 uint64_t Size = Lex.getAPSIntVal().getZExtValue(); 1591 Lex.Lex(); 1592 1593 if (ParseToken(lltok::kw_x, "expected 'x' after element count")) 1594 return true; 1595 1596 LocTy TypeLoc = Lex.getLoc(); 1597 Type *EltTy = 0; 1598 if (ParseType(EltTy)) return true; 1599 1600 if (ParseToken(isVector ? lltok::greater : lltok::rsquare, 1601 "expected end of sequential type")) 1602 return true; 1603 1604 if (isVector) { 1605 if (Size == 0) 1606 return Error(SizeLoc, "zero element vector is illegal"); 1607 if ((unsigned)Size != Size) 1608 return Error(SizeLoc, "size too large for vector"); 1609 if (!VectorType::isValidElementType(EltTy)) 1610 return Error(TypeLoc, "vector element type must be fp or integer"); 1611 Result = VectorType::get(EltTy, unsigned(Size)); 1612 } else { 1613 if (!ArrayType::isValidElementType(EltTy)) 1614 return Error(TypeLoc, "invalid array element type"); 1615 Result = ArrayType::get(EltTy, Size); 1616 } 1617 return false; 1618} 1619 1620//===----------------------------------------------------------------------===// 1621// Function Semantic Analysis. 1622//===----------------------------------------------------------------------===// 1623 1624LLParser::PerFunctionState::PerFunctionState(LLParser &p, Function &f, 1625 int functionNumber) 1626 : P(p), F(f), FunctionNumber(functionNumber) { 1627 1628 // Insert unnamed arguments into the NumberedVals list. 1629 for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 1630 AI != E; ++AI) 1631 if (!AI->hasName()) 1632 NumberedVals.push_back(AI); 1633} 1634 1635LLParser::PerFunctionState::~PerFunctionState() { 1636 // If there were any forward referenced non-basicblock values, delete them. 1637 for (std::map<std::string, std::pair<Value*, LocTy> >::iterator 1638 I = ForwardRefVals.begin(), E = ForwardRefVals.end(); I != E; ++I) 1639 if (!isa<BasicBlock>(I->second.first)) { 1640 I->second.first->replaceAllUsesWith( 1641 UndefValue::get(I->second.first->getType())); 1642 delete I->second.first; 1643 I->second.first = 0; 1644 } 1645 1646 for (std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1647 I = ForwardRefValIDs.begin(), E = ForwardRefValIDs.end(); I != E; ++I) 1648 if (!isa<BasicBlock>(I->second.first)) { 1649 I->second.first->replaceAllUsesWith( 1650 UndefValue::get(I->second.first->getType())); 1651 delete I->second.first; 1652 I->second.first = 0; 1653 } 1654} 1655 1656bool LLParser::PerFunctionState::FinishFunction() { 1657 // Check to see if someone took the address of labels in this block. 1658 if (!P.ForwardRefBlockAddresses.empty()) { 1659 ValID FunctionID; 1660 if (!F.getName().empty()) { 1661 FunctionID.Kind = ValID::t_GlobalName; 1662 FunctionID.StrVal = F.getName(); 1663 } else { 1664 FunctionID.Kind = ValID::t_GlobalID; 1665 FunctionID.UIntVal = FunctionNumber; 1666 } 1667 1668 std::map<ValID, std::vector<std::pair<ValID, GlobalValue*> > >::iterator 1669 FRBAI = P.ForwardRefBlockAddresses.find(FunctionID); 1670 if (FRBAI != P.ForwardRefBlockAddresses.end()) { 1671 // Resolve all these references. 1672 if (P.ResolveForwardRefBlockAddresses(&F, FRBAI->second, this)) 1673 return true; 1674 1675 P.ForwardRefBlockAddresses.erase(FRBAI); 1676 } 1677 } 1678 1679 if (!ForwardRefVals.empty()) 1680 return P.Error(ForwardRefVals.begin()->second.second, 1681 "use of undefined value '%" + ForwardRefVals.begin()->first + 1682 "'"); 1683 if (!ForwardRefValIDs.empty()) 1684 return P.Error(ForwardRefValIDs.begin()->second.second, 1685 "use of undefined value '%" + 1686 Twine(ForwardRefValIDs.begin()->first) + "'"); 1687 return false; 1688} 1689 1690 1691/// GetVal - Get a value with the specified name or ID, creating a 1692/// forward reference record if needed. This can return null if the value 1693/// exists but does not have the right type. 1694Value *LLParser::PerFunctionState::GetVal(const std::string &Name, 1695 Type *Ty, LocTy Loc) { 1696 // Look this name up in the normal function symbol table. 1697 Value *Val = F.getValueSymbolTable().lookup(Name); 1698 1699 // If this is a forward reference for the value, see if we already created a 1700 // forward ref record. 1701 if (Val == 0) { 1702 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1703 I = ForwardRefVals.find(Name); 1704 if (I != ForwardRefVals.end()) 1705 Val = I->second.first; 1706 } 1707 1708 // If we have the value in the symbol table or fwd-ref table, return it. 1709 if (Val) { 1710 if (Val->getType() == Ty) return Val; 1711 if (Ty->isLabelTy()) 1712 P.Error(Loc, "'%" + Name + "' is not a basic block"); 1713 else 1714 P.Error(Loc, "'%" + Name + "' defined with type '" + 1715 getTypeString(Val->getType()) + "'"); 1716 return 0; 1717 } 1718 1719 // Don't make placeholders with invalid type. 1720 if (!Ty->isFirstClassType() && !Ty->isLabelTy()) { 1721 P.Error(Loc, "invalid use of a non-first-class type"); 1722 return 0; 1723 } 1724 1725 // Otherwise, create a new forward reference for this value and remember it. 1726 Value *FwdVal; 1727 if (Ty->isLabelTy()) 1728 FwdVal = BasicBlock::Create(F.getContext(), Name, &F); 1729 else 1730 FwdVal = new Argument(Ty, Name); 1731 1732 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 1733 return FwdVal; 1734} 1735 1736Value *LLParser::PerFunctionState::GetVal(unsigned ID, Type *Ty, 1737 LocTy Loc) { 1738 // Look this name up in the normal function symbol table. 1739 Value *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 1740 1741 // If this is a forward reference for the value, see if we already created a 1742 // forward ref record. 1743 if (Val == 0) { 1744 std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1745 I = ForwardRefValIDs.find(ID); 1746 if (I != ForwardRefValIDs.end()) 1747 Val = I->second.first; 1748 } 1749 1750 // If we have the value in the symbol table or fwd-ref table, return it. 1751 if (Val) { 1752 if (Val->getType() == Ty) return Val; 1753 if (Ty->isLabelTy()) 1754 P.Error(Loc, "'%" + Twine(ID) + "' is not a basic block"); 1755 else 1756 P.Error(Loc, "'%" + Twine(ID) + "' defined with type '" + 1757 getTypeString(Val->getType()) + "'"); 1758 return 0; 1759 } 1760 1761 if (!Ty->isFirstClassType() && !Ty->isLabelTy()) { 1762 P.Error(Loc, "invalid use of a non-first-class type"); 1763 return 0; 1764 } 1765 1766 // Otherwise, create a new forward reference for this value and remember it. 1767 Value *FwdVal; 1768 if (Ty->isLabelTy()) 1769 FwdVal = BasicBlock::Create(F.getContext(), "", &F); 1770 else 1771 FwdVal = new Argument(Ty); 1772 1773 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 1774 return FwdVal; 1775} 1776 1777/// SetInstName - After an instruction is parsed and inserted into its 1778/// basic block, this installs its name. 1779bool LLParser::PerFunctionState::SetInstName(int NameID, 1780 const std::string &NameStr, 1781 LocTy NameLoc, Instruction *Inst) { 1782 // If this instruction has void type, it cannot have a name or ID specified. 1783 if (Inst->getType()->isVoidTy()) { 1784 if (NameID != -1 || !NameStr.empty()) 1785 return P.Error(NameLoc, "instructions returning void cannot have a name"); 1786 return false; 1787 } 1788 1789 // If this was a numbered instruction, verify that the instruction is the 1790 // expected value and resolve any forward references. 1791 if (NameStr.empty()) { 1792 // If neither a name nor an ID was specified, just use the next ID. 1793 if (NameID == -1) 1794 NameID = NumberedVals.size(); 1795 1796 if (unsigned(NameID) != NumberedVals.size()) 1797 return P.Error(NameLoc, "instruction expected to be numbered '%" + 1798 Twine(NumberedVals.size()) + "'"); 1799 1800 std::map<unsigned, std::pair<Value*, LocTy> >::iterator FI = 1801 ForwardRefValIDs.find(NameID); 1802 if (FI != ForwardRefValIDs.end()) { 1803 if (FI->second.first->getType() != Inst->getType()) 1804 return P.Error(NameLoc, "instruction forward referenced with type '" + 1805 getTypeString(FI->second.first->getType()) + "'"); 1806 FI->second.first->replaceAllUsesWith(Inst); 1807 delete FI->second.first; 1808 ForwardRefValIDs.erase(FI); 1809 } 1810 1811 NumberedVals.push_back(Inst); 1812 return false; 1813 } 1814 1815 // Otherwise, the instruction had a name. Resolve forward refs and set it. 1816 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1817 FI = ForwardRefVals.find(NameStr); 1818 if (FI != ForwardRefVals.end()) { 1819 if (FI->second.first->getType() != Inst->getType()) 1820 return P.Error(NameLoc, "instruction forward referenced with type '" + 1821 getTypeString(FI->second.first->getType()) + "'"); 1822 FI->second.first->replaceAllUsesWith(Inst); 1823 delete FI->second.first; 1824 ForwardRefVals.erase(FI); 1825 } 1826 1827 // Set the name on the instruction. 1828 Inst->setName(NameStr); 1829 1830 if (Inst->getName() != NameStr) 1831 return P.Error(NameLoc, "multiple definition of local value named '" + 1832 NameStr + "'"); 1833 return false; 1834} 1835 1836/// GetBB - Get a basic block with the specified name or ID, creating a 1837/// forward reference record if needed. 1838BasicBlock *LLParser::PerFunctionState::GetBB(const std::string &Name, 1839 LocTy Loc) { 1840 return cast_or_null<BasicBlock>(GetVal(Name, 1841 Type::getLabelTy(F.getContext()), Loc)); 1842} 1843 1844BasicBlock *LLParser::PerFunctionState::GetBB(unsigned ID, LocTy Loc) { 1845 return cast_or_null<BasicBlock>(GetVal(ID, 1846 Type::getLabelTy(F.getContext()), Loc)); 1847} 1848 1849/// DefineBB - Define the specified basic block, which is either named or 1850/// unnamed. If there is an error, this returns null otherwise it returns 1851/// the block being defined. 1852BasicBlock *LLParser::PerFunctionState::DefineBB(const std::string &Name, 1853 LocTy Loc) { 1854 BasicBlock *BB; 1855 if (Name.empty()) 1856 BB = GetBB(NumberedVals.size(), Loc); 1857 else 1858 BB = GetBB(Name, Loc); 1859 if (BB == 0) return 0; // Already diagnosed error. 1860 1861 // Move the block to the end of the function. Forward ref'd blocks are 1862 // inserted wherever they happen to be referenced. 1863 F.getBasicBlockList().splice(F.end(), F.getBasicBlockList(), BB); 1864 1865 // Remove the block from forward ref sets. 1866 if (Name.empty()) { 1867 ForwardRefValIDs.erase(NumberedVals.size()); 1868 NumberedVals.push_back(BB); 1869 } else { 1870 // BB forward references are already in the function symbol table. 1871 ForwardRefVals.erase(Name); 1872 } 1873 1874 return BB; 1875} 1876 1877//===----------------------------------------------------------------------===// 1878// Constants. 1879//===----------------------------------------------------------------------===// 1880 1881/// ParseValID - Parse an abstract value that doesn't necessarily have a 1882/// type implied. For example, if we parse "4" we don't know what integer type 1883/// it has. The value will later be combined with its type and checked for 1884/// sanity. PFS is used to convert function-local operands of metadata (since 1885/// metadata operands are not just parsed here but also converted to values). 1886/// PFS can be null when we are not parsing metadata values inside a function. 1887bool LLParser::ParseValID(ValID &ID, PerFunctionState *PFS) { 1888 ID.Loc = Lex.getLoc(); 1889 switch (Lex.getKind()) { 1890 default: return TokError("expected value token"); 1891 case lltok::GlobalID: // @42 1892 ID.UIntVal = Lex.getUIntVal(); 1893 ID.Kind = ValID::t_GlobalID; 1894 break; 1895 case lltok::GlobalVar: // @foo 1896 ID.StrVal = Lex.getStrVal(); 1897 ID.Kind = ValID::t_GlobalName; 1898 break; 1899 case lltok::LocalVarID: // %42 1900 ID.UIntVal = Lex.getUIntVal(); 1901 ID.Kind = ValID::t_LocalID; 1902 break; 1903 case lltok::LocalVar: // %foo 1904 ID.StrVal = Lex.getStrVal(); 1905 ID.Kind = ValID::t_LocalName; 1906 break; 1907 case lltok::exclaim: // !42, !{...}, or !"foo" 1908 return ParseMetadataValue(ID, PFS); 1909 case lltok::APSInt: 1910 ID.APSIntVal = Lex.getAPSIntVal(); 1911 ID.Kind = ValID::t_APSInt; 1912 break; 1913 case lltok::APFloat: 1914 ID.APFloatVal = Lex.getAPFloatVal(); 1915 ID.Kind = ValID::t_APFloat; 1916 break; 1917 case lltok::kw_true: 1918 ID.ConstantVal = ConstantInt::getTrue(Context); 1919 ID.Kind = ValID::t_Constant; 1920 break; 1921 case lltok::kw_false: 1922 ID.ConstantVal = ConstantInt::getFalse(Context); 1923 ID.Kind = ValID::t_Constant; 1924 break; 1925 case lltok::kw_null: ID.Kind = ValID::t_Null; break; 1926 case lltok::kw_undef: ID.Kind = ValID::t_Undef; break; 1927 case lltok::kw_zeroinitializer: ID.Kind = ValID::t_Zero; break; 1928 1929 case lltok::lbrace: { 1930 // ValID ::= '{' ConstVector '}' 1931 Lex.Lex(); 1932 SmallVector<Constant*, 16> Elts; 1933 if (ParseGlobalValueVector(Elts) || 1934 ParseToken(lltok::rbrace, "expected end of struct constant")) 1935 return true; 1936 1937 ID.ConstantStructElts = new Constant*[Elts.size()]; 1938 ID.UIntVal = Elts.size(); 1939 memcpy(ID.ConstantStructElts, Elts.data(), Elts.size()*sizeof(Elts[0])); 1940 ID.Kind = ValID::t_ConstantStruct; 1941 return false; 1942 } 1943 case lltok::less: { 1944 // ValID ::= '<' ConstVector '>' --> Vector. 1945 // ValID ::= '<' '{' ConstVector '}' '>' --> Packed Struct. 1946 Lex.Lex(); 1947 bool isPackedStruct = EatIfPresent(lltok::lbrace); 1948 1949 SmallVector<Constant*, 16> Elts; 1950 LocTy FirstEltLoc = Lex.getLoc(); 1951 if (ParseGlobalValueVector(Elts) || 1952 (isPackedStruct && 1953 ParseToken(lltok::rbrace, "expected end of packed struct")) || 1954 ParseToken(lltok::greater, "expected end of constant")) 1955 return true; 1956 1957 if (isPackedStruct) { 1958 ID.ConstantStructElts = new Constant*[Elts.size()]; 1959 memcpy(ID.ConstantStructElts, Elts.data(), Elts.size()*sizeof(Elts[0])); 1960 ID.UIntVal = Elts.size(); 1961 ID.Kind = ValID::t_PackedConstantStruct; 1962 return false; 1963 } 1964 1965 if (Elts.empty()) 1966 return Error(ID.Loc, "constant vector must not be empty"); 1967 1968 if (!Elts[0]->getType()->isIntegerTy() && 1969 !Elts[0]->getType()->isFloatingPointTy()) 1970 return Error(FirstEltLoc, 1971 "vector elements must have integer or floating point type"); 1972 1973 // Verify that all the vector elements have the same type. 1974 for (unsigned i = 1, e = Elts.size(); i != e; ++i) 1975 if (Elts[i]->getType() != Elts[0]->getType()) 1976 return Error(FirstEltLoc, 1977 "vector element #" + Twine(i) + 1978 " is not of type '" + getTypeString(Elts[0]->getType())); 1979 1980 ID.ConstantVal = ConstantVector::get(Elts); 1981 ID.Kind = ValID::t_Constant; 1982 return false; 1983 } 1984 case lltok::lsquare: { // Array Constant 1985 Lex.Lex(); 1986 SmallVector<Constant*, 16> Elts; 1987 LocTy FirstEltLoc = Lex.getLoc(); 1988 if (ParseGlobalValueVector(Elts) || 1989 ParseToken(lltok::rsquare, "expected end of array constant")) 1990 return true; 1991 1992 // Handle empty element. 1993 if (Elts.empty()) { 1994 // Use undef instead of an array because it's inconvenient to determine 1995 // the element type at this point, there being no elements to examine. 1996 ID.Kind = ValID::t_EmptyArray; 1997 return false; 1998 } 1999 2000 if (!Elts[0]->getType()->isFirstClassType()) 2001 return Error(FirstEltLoc, "invalid array element type: " + 2002 getTypeString(Elts[0]->getType())); 2003 2004 ArrayType *ATy = ArrayType::get(Elts[0]->getType(), Elts.size()); 2005 2006 // Verify all elements are correct type! 2007 for (unsigned i = 0, e = Elts.size(); i != e; ++i) { 2008 if (Elts[i]->getType() != Elts[0]->getType()) 2009 return Error(FirstEltLoc, 2010 "array element #" + Twine(i) + 2011 " is not of type '" + getTypeString(Elts[0]->getType())); 2012 } 2013 2014 ID.ConstantVal = ConstantArray::get(ATy, Elts); 2015 ID.Kind = ValID::t_Constant; 2016 return false; 2017 } 2018 case lltok::kw_c: // c "foo" 2019 Lex.Lex(); 2020 ID.ConstantVal = ConstantArray::get(Context, Lex.getStrVal(), false); 2021 if (ParseToken(lltok::StringConstant, "expected string")) return true; 2022 ID.Kind = ValID::t_Constant; 2023 return false; 2024 2025 case lltok::kw_asm: { 2026 // ValID ::= 'asm' SideEffect? AlignStack? STRINGCONSTANT ',' STRINGCONSTANT 2027 bool HasSideEffect, AlignStack; 2028 Lex.Lex(); 2029 if (ParseOptionalToken(lltok::kw_sideeffect, HasSideEffect) || 2030 ParseOptionalToken(lltok::kw_alignstack, AlignStack) || 2031 ParseStringConstant(ID.StrVal) || 2032 ParseToken(lltok::comma, "expected comma in inline asm expression") || 2033 ParseToken(lltok::StringConstant, "expected constraint string")) 2034 return true; 2035 ID.StrVal2 = Lex.getStrVal(); 2036 ID.UIntVal = unsigned(HasSideEffect) | (unsigned(AlignStack)<<1); 2037 ID.Kind = ValID::t_InlineAsm; 2038 return false; 2039 } 2040 2041 case lltok::kw_blockaddress: { 2042 // ValID ::= 'blockaddress' '(' @foo ',' %bar ')' 2043 Lex.Lex(); 2044 2045 ValID Fn, Label; 2046 LocTy FnLoc, LabelLoc; 2047 2048 if (ParseToken(lltok::lparen, "expected '(' in block address expression") || 2049 ParseValID(Fn) || 2050 ParseToken(lltok::comma, "expected comma in block address expression")|| 2051 ParseValID(Label) || 2052 ParseToken(lltok::rparen, "expected ')' in block address expression")) 2053 return true; 2054 2055 if (Fn.Kind != ValID::t_GlobalID && Fn.Kind != ValID::t_GlobalName) 2056 return Error(Fn.Loc, "expected function name in blockaddress"); 2057 if (Label.Kind != ValID::t_LocalID && Label.Kind != ValID::t_LocalName) 2058 return Error(Label.Loc, "expected basic block name in blockaddress"); 2059 2060 // Make a global variable as a placeholder for this reference. 2061 GlobalVariable *FwdRef = new GlobalVariable(*M, Type::getInt8Ty(Context), 2062 false, GlobalValue::InternalLinkage, 2063 0, ""); 2064 ForwardRefBlockAddresses[Fn].push_back(std::make_pair(Label, FwdRef)); 2065 ID.ConstantVal = FwdRef; 2066 ID.Kind = ValID::t_Constant; 2067 return false; 2068 } 2069 2070 case lltok::kw_trunc: 2071 case lltok::kw_zext: 2072 case lltok::kw_sext: 2073 case lltok::kw_fptrunc: 2074 case lltok::kw_fpext: 2075 case lltok::kw_bitcast: 2076 case lltok::kw_uitofp: 2077 case lltok::kw_sitofp: 2078 case lltok::kw_fptoui: 2079 case lltok::kw_fptosi: 2080 case lltok::kw_inttoptr: 2081 case lltok::kw_ptrtoint: { 2082 unsigned Opc = Lex.getUIntVal(); 2083 Type *DestTy = 0; 2084 Constant *SrcVal; 2085 Lex.Lex(); 2086 if (ParseToken(lltok::lparen, "expected '(' after constantexpr cast") || 2087 ParseGlobalTypeAndValue(SrcVal) || 2088 ParseToken(lltok::kw_to, "expected 'to' in constantexpr cast") || 2089 ParseType(DestTy) || 2090 ParseToken(lltok::rparen, "expected ')' at end of constantexpr cast")) 2091 return true; 2092 if (!CastInst::castIsValid((Instruction::CastOps)Opc, SrcVal, DestTy)) 2093 return Error(ID.Loc, "invalid cast opcode for cast from '" + 2094 getTypeString(SrcVal->getType()) + "' to '" + 2095 getTypeString(DestTy) + "'"); 2096 ID.ConstantVal = ConstantExpr::getCast((Instruction::CastOps)Opc, 2097 SrcVal, DestTy); 2098 ID.Kind = ValID::t_Constant; 2099 return false; 2100 } 2101 case lltok::kw_extractvalue: { 2102 Lex.Lex(); 2103 Constant *Val; 2104 SmallVector<unsigned, 4> Indices; 2105 if (ParseToken(lltok::lparen, "expected '(' in extractvalue constantexpr")|| 2106 ParseGlobalTypeAndValue(Val) || 2107 ParseIndexList(Indices) || 2108 ParseToken(lltok::rparen, "expected ')' in extractvalue constantexpr")) 2109 return true; 2110 2111 if (!Val->getType()->isAggregateType()) 2112 return Error(ID.Loc, "extractvalue operand must be aggregate type"); 2113 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices)) 2114 return Error(ID.Loc, "invalid indices for extractvalue"); 2115 ID.ConstantVal = ConstantExpr::getExtractValue(Val, Indices); 2116 ID.Kind = ValID::t_Constant; 2117 return false; 2118 } 2119 case lltok::kw_insertvalue: { 2120 Lex.Lex(); 2121 Constant *Val0, *Val1; 2122 SmallVector<unsigned, 4> Indices; 2123 if (ParseToken(lltok::lparen, "expected '(' in insertvalue constantexpr")|| 2124 ParseGlobalTypeAndValue(Val0) || 2125 ParseToken(lltok::comma, "expected comma in insertvalue constantexpr")|| 2126 ParseGlobalTypeAndValue(Val1) || 2127 ParseIndexList(Indices) || 2128 ParseToken(lltok::rparen, "expected ')' in insertvalue constantexpr")) 2129 return true; 2130 if (!Val0->getType()->isAggregateType()) 2131 return Error(ID.Loc, "insertvalue operand must be aggregate type"); 2132 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices)) 2133 return Error(ID.Loc, "invalid indices for insertvalue"); 2134 ID.ConstantVal = ConstantExpr::getInsertValue(Val0, Val1, Indices); 2135 ID.Kind = ValID::t_Constant; 2136 return false; 2137 } 2138 case lltok::kw_icmp: 2139 case lltok::kw_fcmp: { 2140 unsigned PredVal, Opc = Lex.getUIntVal(); 2141 Constant *Val0, *Val1; 2142 Lex.Lex(); 2143 if (ParseCmpPredicate(PredVal, Opc) || 2144 ParseToken(lltok::lparen, "expected '(' in compare constantexpr") || 2145 ParseGlobalTypeAndValue(Val0) || 2146 ParseToken(lltok::comma, "expected comma in compare constantexpr") || 2147 ParseGlobalTypeAndValue(Val1) || 2148 ParseToken(lltok::rparen, "expected ')' in compare constantexpr")) 2149 return true; 2150 2151 if (Val0->getType() != Val1->getType()) 2152 return Error(ID.Loc, "compare operands must have the same type"); 2153 2154 CmpInst::Predicate Pred = (CmpInst::Predicate)PredVal; 2155 2156 if (Opc == Instruction::FCmp) { 2157 if (!Val0->getType()->isFPOrFPVectorTy()) 2158 return Error(ID.Loc, "fcmp requires floating point operands"); 2159 ID.ConstantVal = ConstantExpr::getFCmp(Pred, Val0, Val1); 2160 } else { 2161 assert(Opc == Instruction::ICmp && "Unexpected opcode for CmpInst!"); 2162 if (!Val0->getType()->isIntOrIntVectorTy() && 2163 !Val0->getType()->isPointerTy()) 2164 return Error(ID.Loc, "icmp requires pointer or integer operands"); 2165 ID.ConstantVal = ConstantExpr::getICmp(Pred, Val0, Val1); 2166 } 2167 ID.Kind = ValID::t_Constant; 2168 return false; 2169 } 2170 2171 // Binary Operators. 2172 case lltok::kw_add: 2173 case lltok::kw_fadd: 2174 case lltok::kw_sub: 2175 case lltok::kw_fsub: 2176 case lltok::kw_mul: 2177 case lltok::kw_fmul: 2178 case lltok::kw_udiv: 2179 case lltok::kw_sdiv: 2180 case lltok::kw_fdiv: 2181 case lltok::kw_urem: 2182 case lltok::kw_srem: 2183 case lltok::kw_frem: 2184 case lltok::kw_shl: 2185 case lltok::kw_lshr: 2186 case lltok::kw_ashr: { 2187 bool NUW = false; 2188 bool NSW = false; 2189 bool Exact = false; 2190 unsigned Opc = Lex.getUIntVal(); 2191 Constant *Val0, *Val1; 2192 Lex.Lex(); 2193 LocTy ModifierLoc = Lex.getLoc(); 2194 if (Opc == Instruction::Add || Opc == Instruction::Sub || 2195 Opc == Instruction::Mul || Opc == Instruction::Shl) { 2196 if (EatIfPresent(lltok::kw_nuw)) 2197 NUW = true; 2198 if (EatIfPresent(lltok::kw_nsw)) { 2199 NSW = true; 2200 if (EatIfPresent(lltok::kw_nuw)) 2201 NUW = true; 2202 } 2203 } else if (Opc == Instruction::SDiv || Opc == Instruction::UDiv || 2204 Opc == Instruction::LShr || Opc == Instruction::AShr) { 2205 if (EatIfPresent(lltok::kw_exact)) 2206 Exact = true; 2207 } 2208 if (ParseToken(lltok::lparen, "expected '(' in binary constantexpr") || 2209 ParseGlobalTypeAndValue(Val0) || 2210 ParseToken(lltok::comma, "expected comma in binary constantexpr") || 2211 ParseGlobalTypeAndValue(Val1) || 2212 ParseToken(lltok::rparen, "expected ')' in binary constantexpr")) 2213 return true; 2214 if (Val0->getType() != Val1->getType()) 2215 return Error(ID.Loc, "operands of constexpr must have same type"); 2216 if (!Val0->getType()->isIntOrIntVectorTy()) { 2217 if (NUW) 2218 return Error(ModifierLoc, "nuw only applies to integer operations"); 2219 if (NSW) 2220 return Error(ModifierLoc, "nsw only applies to integer operations"); 2221 } 2222 // Check that the type is valid for the operator. 2223 switch (Opc) { 2224 case Instruction::Add: 2225 case Instruction::Sub: 2226 case Instruction::Mul: 2227 case Instruction::UDiv: 2228 case Instruction::SDiv: 2229 case Instruction::URem: 2230 case Instruction::SRem: 2231 case Instruction::Shl: 2232 case Instruction::AShr: 2233 case Instruction::LShr: 2234 if (!Val0->getType()->isIntOrIntVectorTy()) 2235 return Error(ID.Loc, "constexpr requires integer operands"); 2236 break; 2237 case Instruction::FAdd: 2238 case Instruction::FSub: 2239 case Instruction::FMul: 2240 case Instruction::FDiv: 2241 case Instruction::FRem: 2242 if (!Val0->getType()->isFPOrFPVectorTy()) 2243 return Error(ID.Loc, "constexpr requires fp operands"); 2244 break; 2245 default: llvm_unreachable("Unknown binary operator!"); 2246 } 2247 unsigned Flags = 0; 2248 if (NUW) Flags |= OverflowingBinaryOperator::NoUnsignedWrap; 2249 if (NSW) Flags |= OverflowingBinaryOperator::NoSignedWrap; 2250 if (Exact) Flags |= PossiblyExactOperator::IsExact; 2251 Constant *C = ConstantExpr::get(Opc, Val0, Val1, Flags); 2252 ID.ConstantVal = C; 2253 ID.Kind = ValID::t_Constant; 2254 return false; 2255 } 2256 2257 // Logical Operations 2258 case lltok::kw_and: 2259 case lltok::kw_or: 2260 case lltok::kw_xor: { 2261 unsigned Opc = Lex.getUIntVal(); 2262 Constant *Val0, *Val1; 2263 Lex.Lex(); 2264 if (ParseToken(lltok::lparen, "expected '(' in logical constantexpr") || 2265 ParseGlobalTypeAndValue(Val0) || 2266 ParseToken(lltok::comma, "expected comma in logical constantexpr") || 2267 ParseGlobalTypeAndValue(Val1) || 2268 ParseToken(lltok::rparen, "expected ')' in logical constantexpr")) 2269 return true; 2270 if (Val0->getType() != Val1->getType()) 2271 return Error(ID.Loc, "operands of constexpr must have same type"); 2272 if (!Val0->getType()->isIntOrIntVectorTy()) 2273 return Error(ID.Loc, 2274 "constexpr requires integer or integer vector operands"); 2275 ID.ConstantVal = ConstantExpr::get(Opc, Val0, Val1); 2276 ID.Kind = ValID::t_Constant; 2277 return false; 2278 } 2279 2280 case lltok::kw_getelementptr: 2281 case lltok::kw_shufflevector: 2282 case lltok::kw_insertelement: 2283 case lltok::kw_extractelement: 2284 case lltok::kw_select: { 2285 unsigned Opc = Lex.getUIntVal(); 2286 SmallVector<Constant*, 16> Elts; 2287 bool InBounds = false; 2288 Lex.Lex(); 2289 if (Opc == Instruction::GetElementPtr) 2290 InBounds = EatIfPresent(lltok::kw_inbounds); 2291 if (ParseToken(lltok::lparen, "expected '(' in constantexpr") || 2292 ParseGlobalValueVector(Elts) || 2293 ParseToken(lltok::rparen, "expected ')' in constantexpr")) 2294 return true; 2295 2296 if (Opc == Instruction::GetElementPtr) { 2297 if (Elts.size() == 0 || !Elts[0]->getType()->isPointerTy()) 2298 return Error(ID.Loc, "getelementptr requires pointer operand"); 2299 2300 ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end()); 2301 if (!GetElementPtrInst::getIndexedType(Elts[0]->getType(), Indices)) 2302 return Error(ID.Loc, "invalid indices for getelementptr"); 2303 ID.ConstantVal = ConstantExpr::getGetElementPtr(Elts[0], Indices, 2304 InBounds); 2305 } else if (Opc == Instruction::Select) { 2306 if (Elts.size() != 3) 2307 return Error(ID.Loc, "expected three operands to select"); 2308 if (const char *Reason = SelectInst::areInvalidOperands(Elts[0], Elts[1], 2309 Elts[2])) 2310 return Error(ID.Loc, Reason); 2311 ID.ConstantVal = ConstantExpr::getSelect(Elts[0], Elts[1], Elts[2]); 2312 } else if (Opc == Instruction::ShuffleVector) { 2313 if (Elts.size() != 3) 2314 return Error(ID.Loc, "expected three operands to shufflevector"); 2315 if (!ShuffleVectorInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2316 return Error(ID.Loc, "invalid operands to shufflevector"); 2317 ID.ConstantVal = 2318 ConstantExpr::getShuffleVector(Elts[0], Elts[1],Elts[2]); 2319 } else if (Opc == Instruction::ExtractElement) { 2320 if (Elts.size() != 2) 2321 return Error(ID.Loc, "expected two operands to extractelement"); 2322 if (!ExtractElementInst::isValidOperands(Elts[0], Elts[1])) 2323 return Error(ID.Loc, "invalid extractelement operands"); 2324 ID.ConstantVal = ConstantExpr::getExtractElement(Elts[0], Elts[1]); 2325 } else { 2326 assert(Opc == Instruction::InsertElement && "Unknown opcode"); 2327 if (Elts.size() != 3) 2328 return Error(ID.Loc, "expected three operands to insertelement"); 2329 if (!InsertElementInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2330 return Error(ID.Loc, "invalid insertelement operands"); 2331 ID.ConstantVal = 2332 ConstantExpr::getInsertElement(Elts[0], Elts[1],Elts[2]); 2333 } 2334 2335 ID.Kind = ValID::t_Constant; 2336 return false; 2337 } 2338 } 2339 2340 Lex.Lex(); 2341 return false; 2342} 2343 2344/// ParseGlobalValue - Parse a global value with the specified type. 2345bool LLParser::ParseGlobalValue(Type *Ty, Constant *&C) { 2346 C = 0; 2347 ValID ID; 2348 Value *V = NULL; 2349 bool Parsed = ParseValID(ID) || 2350 ConvertValIDToValue(Ty, ID, V, NULL); 2351 if (V && !(C = dyn_cast<Constant>(V))) 2352 return Error(ID.Loc, "global values must be constants"); 2353 return Parsed; 2354} 2355 2356bool LLParser::ParseGlobalTypeAndValue(Constant *&V) { 2357 Type *Ty = 0; 2358 return ParseType(Ty) || 2359 ParseGlobalValue(Ty, V); 2360} 2361 2362/// ParseGlobalValueVector 2363/// ::= /*empty*/ 2364/// ::= TypeAndValue (',' TypeAndValue)* 2365bool LLParser::ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts) { 2366 // Empty list. 2367 if (Lex.getKind() == lltok::rbrace || 2368 Lex.getKind() == lltok::rsquare || 2369 Lex.getKind() == lltok::greater || 2370 Lex.getKind() == lltok::rparen) 2371 return false; 2372 2373 Constant *C; 2374 if (ParseGlobalTypeAndValue(C)) return true; 2375 Elts.push_back(C); 2376 2377 while (EatIfPresent(lltok::comma)) { 2378 if (ParseGlobalTypeAndValue(C)) return true; 2379 Elts.push_back(C); 2380 } 2381 2382 return false; 2383} 2384 2385bool LLParser::ParseMetadataListValue(ValID &ID, PerFunctionState *PFS) { 2386 assert(Lex.getKind() == lltok::lbrace); 2387 Lex.Lex(); 2388 2389 SmallVector<Value*, 16> Elts; 2390 if (ParseMDNodeVector(Elts, PFS) || 2391 ParseToken(lltok::rbrace, "expected end of metadata node")) 2392 return true; 2393 2394 ID.MDNodeVal = MDNode::get(Context, Elts); 2395 ID.Kind = ValID::t_MDNode; 2396 return false; 2397} 2398 2399/// ParseMetadataValue 2400/// ::= !42 2401/// ::= !{...} 2402/// ::= !"string" 2403bool LLParser::ParseMetadataValue(ValID &ID, PerFunctionState *PFS) { 2404 assert(Lex.getKind() == lltok::exclaim); 2405 Lex.Lex(); 2406 2407 // MDNode: 2408 // !{ ... } 2409 if (Lex.getKind() == lltok::lbrace) 2410 return ParseMetadataListValue(ID, PFS); 2411 2412 // Standalone metadata reference 2413 // !42 2414 if (Lex.getKind() == lltok::APSInt) { 2415 if (ParseMDNodeID(ID.MDNodeVal)) return true; 2416 ID.Kind = ValID::t_MDNode; 2417 return false; 2418 } 2419 2420 // MDString: 2421 // ::= '!' STRINGCONSTANT 2422 if (ParseMDString(ID.MDStringVal)) return true; 2423 ID.Kind = ValID::t_MDString; 2424 return false; 2425} 2426 2427 2428//===----------------------------------------------------------------------===// 2429// Function Parsing. 2430//===----------------------------------------------------------------------===// 2431 2432bool LLParser::ConvertValIDToValue(Type *Ty, ValID &ID, Value *&V, 2433 PerFunctionState *PFS) { 2434 if (Ty->isFunctionTy()) 2435 return Error(ID.Loc, "functions are not values, refer to them as pointers"); 2436 2437 switch (ID.Kind) { 2438 default: llvm_unreachable("Unknown ValID!"); 2439 case ValID::t_LocalID: 2440 if (!PFS) return Error(ID.Loc, "invalid use of function-local name"); 2441 V = PFS->GetVal(ID.UIntVal, Ty, ID.Loc); 2442 return (V == 0); 2443 case ValID::t_LocalName: 2444 if (!PFS) return Error(ID.Loc, "invalid use of function-local name"); 2445 V = PFS->GetVal(ID.StrVal, Ty, ID.Loc); 2446 return (V == 0); 2447 case ValID::t_InlineAsm: { 2448 PointerType *PTy = dyn_cast<PointerType>(Ty); 2449 FunctionType *FTy = 2450 PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : 0; 2451 if (!FTy || !InlineAsm::Verify(FTy, ID.StrVal2)) 2452 return Error(ID.Loc, "invalid type for inline asm constraint string"); 2453 V = InlineAsm::get(FTy, ID.StrVal, ID.StrVal2, ID.UIntVal&1, ID.UIntVal>>1); 2454 return false; 2455 } 2456 case ValID::t_MDNode: 2457 if (!Ty->isMetadataTy()) 2458 return Error(ID.Loc, "metadata value must have metadata type"); 2459 V = ID.MDNodeVal; 2460 return false; 2461 case ValID::t_MDString: 2462 if (!Ty->isMetadataTy()) 2463 return Error(ID.Loc, "metadata value must have metadata type"); 2464 V = ID.MDStringVal; 2465 return false; 2466 case ValID::t_GlobalName: 2467 V = GetGlobalVal(ID.StrVal, Ty, ID.Loc); 2468 return V == 0; 2469 case ValID::t_GlobalID: 2470 V = GetGlobalVal(ID.UIntVal, Ty, ID.Loc); 2471 return V == 0; 2472 case ValID::t_APSInt: 2473 if (!Ty->isIntegerTy()) 2474 return Error(ID.Loc, "integer constant must have integer type"); 2475 ID.APSIntVal = ID.APSIntVal.extOrTrunc(Ty->getPrimitiveSizeInBits()); 2476 V = ConstantInt::get(Context, ID.APSIntVal); 2477 return false; 2478 case ValID::t_APFloat: 2479 if (!Ty->isFloatingPointTy() || 2480 !ConstantFP::isValueValidForType(Ty, ID.APFloatVal)) 2481 return Error(ID.Loc, "floating point constant invalid for type"); 2482 2483 // The lexer has no type info, so builds all float and double FP constants 2484 // as double. Fix this here. Long double does not need this. 2485 if (&ID.APFloatVal.getSemantics() == &APFloat::IEEEdouble && 2486 Ty->isFloatTy()) { 2487 bool Ignored; 2488 ID.APFloatVal.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, 2489 &Ignored); 2490 } 2491 V = ConstantFP::get(Context, ID.APFloatVal); 2492 2493 if (V->getType() != Ty) 2494 return Error(ID.Loc, "floating point constant does not have type '" + 2495 getTypeString(Ty) + "'"); 2496 2497 return false; 2498 case ValID::t_Null: 2499 if (!Ty->isPointerTy()) 2500 return Error(ID.Loc, "null must be a pointer type"); 2501 V = ConstantPointerNull::get(cast<PointerType>(Ty)); 2502 return false; 2503 case ValID::t_Undef: 2504 // FIXME: LabelTy should not be a first-class type. 2505 if (!Ty->isFirstClassType() || Ty->isLabelTy()) 2506 return Error(ID.Loc, "invalid type for undef constant"); 2507 V = UndefValue::get(Ty); 2508 return false; 2509 case ValID::t_EmptyArray: 2510 if (!Ty->isArrayTy() || cast<ArrayType>(Ty)->getNumElements() != 0) 2511 return Error(ID.Loc, "invalid empty array initializer"); 2512 V = UndefValue::get(Ty); 2513 return false; 2514 case ValID::t_Zero: 2515 // FIXME: LabelTy should not be a first-class type. 2516 if (!Ty->isFirstClassType() || Ty->isLabelTy()) 2517 return Error(ID.Loc, "invalid type for null constant"); 2518 V = Constant::getNullValue(Ty); 2519 return false; 2520 case ValID::t_Constant: 2521 if (ID.ConstantVal->getType() != Ty) 2522 return Error(ID.Loc, "constant expression type mismatch"); 2523 2524 V = ID.ConstantVal; 2525 return false; 2526 case ValID::t_ConstantStruct: 2527 case ValID::t_PackedConstantStruct: 2528 if (StructType *ST = dyn_cast<StructType>(Ty)) { 2529 if (ST->getNumElements() != ID.UIntVal) 2530 return Error(ID.Loc, 2531 "initializer with struct type has wrong # elements"); 2532 if (ST->isPacked() != (ID.Kind == ValID::t_PackedConstantStruct)) 2533 return Error(ID.Loc, "packed'ness of initializer and type don't match"); 2534 2535 // Verify that the elements are compatible with the structtype. 2536 for (unsigned i = 0, e = ID.UIntVal; i != e; ++i) 2537 if (ID.ConstantStructElts[i]->getType() != ST->getElementType(i)) 2538 return Error(ID.Loc, "element " + Twine(i) + 2539 " of struct initializer doesn't match struct element type"); 2540 2541 V = ConstantStruct::get(ST, makeArrayRef(ID.ConstantStructElts, 2542 ID.UIntVal)); 2543 } else 2544 return Error(ID.Loc, "constant expression type mismatch"); 2545 return false; 2546 } 2547} 2548 2549bool LLParser::ParseValue(Type *Ty, Value *&V, PerFunctionState *PFS) { 2550 V = 0; 2551 ValID ID; 2552 return ParseValID(ID, PFS) || 2553 ConvertValIDToValue(Ty, ID, V, PFS); 2554} 2555 2556bool LLParser::ParseTypeAndValue(Value *&V, PerFunctionState *PFS) { 2557 Type *Ty = 0; 2558 return ParseType(Ty) || 2559 ParseValue(Ty, V, PFS); 2560} 2561 2562bool LLParser::ParseTypeAndBasicBlock(BasicBlock *&BB, LocTy &Loc, 2563 PerFunctionState &PFS) { 2564 Value *V; 2565 Loc = Lex.getLoc(); 2566 if (ParseTypeAndValue(V, PFS)) return true; 2567 if (!isa<BasicBlock>(V)) 2568 return Error(Loc, "expected a basic block"); 2569 BB = cast<BasicBlock>(V); 2570 return false; 2571} 2572 2573 2574/// FunctionHeader 2575/// ::= OptionalLinkage OptionalVisibility OptionalCallingConv OptRetAttrs 2576/// OptUnnamedAddr Type GlobalName '(' ArgList ')' OptFuncAttrs OptSection 2577/// OptionalAlign OptGC 2578bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) { 2579 // Parse the linkage. 2580 LocTy LinkageLoc = Lex.getLoc(); 2581 unsigned Linkage; 2582 2583 unsigned Visibility, RetAttrs; 2584 CallingConv::ID CC; 2585 Type *RetType = 0; 2586 LocTy RetTypeLoc = Lex.getLoc(); 2587 if (ParseOptionalLinkage(Linkage) || 2588 ParseOptionalVisibility(Visibility) || 2589 ParseOptionalCallingConv(CC) || 2590 ParseOptionalAttrs(RetAttrs, 1) || 2591 ParseType(RetType, RetTypeLoc, true /*void allowed*/)) 2592 return true; 2593 2594 // Verify that the linkage is ok. 2595 switch ((GlobalValue::LinkageTypes)Linkage) { 2596 case GlobalValue::ExternalLinkage: 2597 break; // always ok. 2598 case GlobalValue::DLLImportLinkage: 2599 case GlobalValue::ExternalWeakLinkage: 2600 if (isDefine) 2601 return Error(LinkageLoc, "invalid linkage for function definition"); 2602 break; 2603 case GlobalValue::PrivateLinkage: 2604 case GlobalValue::LinkerPrivateLinkage: 2605 case GlobalValue::LinkerPrivateWeakLinkage: 2606 case GlobalValue::LinkerPrivateWeakDefAutoLinkage: 2607 case GlobalValue::InternalLinkage: 2608 case GlobalValue::AvailableExternallyLinkage: 2609 case GlobalValue::LinkOnceAnyLinkage: 2610 case GlobalValue::LinkOnceODRLinkage: 2611 case GlobalValue::WeakAnyLinkage: 2612 case GlobalValue::WeakODRLinkage: 2613 case GlobalValue::DLLExportLinkage: 2614 if (!isDefine) 2615 return Error(LinkageLoc, "invalid linkage for function declaration"); 2616 break; 2617 case GlobalValue::AppendingLinkage: 2618 case GlobalValue::CommonLinkage: 2619 return Error(LinkageLoc, "invalid function linkage type"); 2620 } 2621 2622 if (!FunctionType::isValidReturnType(RetType)) 2623 return Error(RetTypeLoc, "invalid function return type"); 2624 2625 LocTy NameLoc = Lex.getLoc(); 2626 2627 std::string FunctionName; 2628 if (Lex.getKind() == lltok::GlobalVar) { 2629 FunctionName = Lex.getStrVal(); 2630 } else if (Lex.getKind() == lltok::GlobalID) { // @42 is ok. 2631 unsigned NameID = Lex.getUIntVal(); 2632 2633 if (NameID != NumberedVals.size()) 2634 return TokError("function expected to be numbered '%" + 2635 Twine(NumberedVals.size()) + "'"); 2636 } else { 2637 return TokError("expected function name"); 2638 } 2639 2640 Lex.Lex(); 2641 2642 if (Lex.getKind() != lltok::lparen) 2643 return TokError("expected '(' in function argument list"); 2644 2645 SmallVector<ArgInfo, 8> ArgList; 2646 bool isVarArg; 2647 unsigned FuncAttrs; 2648 std::string Section; 2649 unsigned Alignment; 2650 std::string GC; 2651 bool UnnamedAddr; 2652 LocTy UnnamedAddrLoc; 2653 2654 if (ParseArgumentList(ArgList, isVarArg) || 2655 ParseOptionalToken(lltok::kw_unnamed_addr, UnnamedAddr, 2656 &UnnamedAddrLoc) || 2657 ParseOptionalAttrs(FuncAttrs, 2) || 2658 (EatIfPresent(lltok::kw_section) && 2659 ParseStringConstant(Section)) || 2660 ParseOptionalAlignment(Alignment) || 2661 (EatIfPresent(lltok::kw_gc) && 2662 ParseStringConstant(GC))) 2663 return true; 2664 2665 // If the alignment was parsed as an attribute, move to the alignment field. 2666 if (FuncAttrs & Attribute::Alignment) { 2667 Alignment = Attribute::getAlignmentFromAttrs(FuncAttrs); 2668 FuncAttrs &= ~Attribute::Alignment; 2669 } 2670 2671 // Okay, if we got here, the function is syntactically valid. Convert types 2672 // and do semantic checks. 2673 std::vector<Type*> ParamTypeList; 2674 SmallVector<AttributeWithIndex, 8> Attrs; 2675 2676 if (RetAttrs != Attribute::None) 2677 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 2678 2679 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 2680 ParamTypeList.push_back(ArgList[i].Ty); 2681 if (ArgList[i].Attrs != Attribute::None) 2682 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 2683 } 2684 2685 if (FuncAttrs != Attribute::None) 2686 Attrs.push_back(AttributeWithIndex::get(~0, FuncAttrs)); 2687 2688 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 2689 2690 if (PAL.paramHasAttr(1, Attribute::StructRet) && !RetType->isVoidTy()) 2691 return Error(RetTypeLoc, "functions with 'sret' argument must return void"); 2692 2693 FunctionType *FT = 2694 FunctionType::get(RetType, ParamTypeList, isVarArg); 2695 PointerType *PFT = PointerType::getUnqual(FT); 2696 2697 Fn = 0; 2698 if (!FunctionName.empty()) { 2699 // If this was a definition of a forward reference, remove the definition 2700 // from the forward reference table and fill in the forward ref. 2701 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator FRVI = 2702 ForwardRefVals.find(FunctionName); 2703 if (FRVI != ForwardRefVals.end()) { 2704 Fn = M->getFunction(FunctionName); 2705 if (Fn->getType() != PFT) 2706 return Error(FRVI->second.second, "invalid forward reference to " 2707 "function '" + FunctionName + "' with wrong type!"); 2708 2709 ForwardRefVals.erase(FRVI); 2710 } else if ((Fn = M->getFunction(FunctionName))) { 2711 // Reject redefinitions. 2712 return Error(NameLoc, "invalid redefinition of function '" + 2713 FunctionName + "'"); 2714 } else if (M->getNamedValue(FunctionName)) { 2715 return Error(NameLoc, "redefinition of function '@" + FunctionName + "'"); 2716 } 2717 2718 } else { 2719 // If this is a definition of a forward referenced function, make sure the 2720 // types agree. 2721 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator I 2722 = ForwardRefValIDs.find(NumberedVals.size()); 2723 if (I != ForwardRefValIDs.end()) { 2724 Fn = cast<Function>(I->second.first); 2725 if (Fn->getType() != PFT) 2726 return Error(NameLoc, "type of definition and forward reference of '@" + 2727 Twine(NumberedVals.size()) + "' disagree"); 2728 ForwardRefValIDs.erase(I); 2729 } 2730 } 2731 2732 if (Fn == 0) 2733 Fn = Function::Create(FT, GlobalValue::ExternalLinkage, FunctionName, M); 2734 else // Move the forward-reference to the correct spot in the module. 2735 M->getFunctionList().splice(M->end(), M->getFunctionList(), Fn); 2736 2737 if (FunctionName.empty()) 2738 NumberedVals.push_back(Fn); 2739 2740 Fn->setLinkage((GlobalValue::LinkageTypes)Linkage); 2741 Fn->setVisibility((GlobalValue::VisibilityTypes)Visibility); 2742 Fn->setCallingConv(CC); 2743 Fn->setAttributes(PAL); 2744 Fn->setUnnamedAddr(UnnamedAddr); 2745 Fn->setAlignment(Alignment); 2746 Fn->setSection(Section); 2747 if (!GC.empty()) Fn->setGC(GC.c_str()); 2748 2749 // Add all of the arguments we parsed to the function. 2750 Function::arg_iterator ArgIt = Fn->arg_begin(); 2751 for (unsigned i = 0, e = ArgList.size(); i != e; ++i, ++ArgIt) { 2752 // If the argument has a name, insert it into the argument symbol table. 2753 if (ArgList[i].Name.empty()) continue; 2754 2755 // Set the name, if it conflicted, it will be auto-renamed. 2756 ArgIt->setName(ArgList[i].Name); 2757 2758 if (ArgIt->getName() != ArgList[i].Name) 2759 return Error(ArgList[i].Loc, "redefinition of argument '%" + 2760 ArgList[i].Name + "'"); 2761 } 2762 2763 return false; 2764} 2765 2766 2767/// ParseFunctionBody 2768/// ::= '{' BasicBlock+ '}' 2769/// 2770bool LLParser::ParseFunctionBody(Function &Fn) { 2771 if (Lex.getKind() != lltok::lbrace) 2772 return TokError("expected '{' in function body"); 2773 Lex.Lex(); // eat the {. 2774 2775 int FunctionNumber = -1; 2776 if (!Fn.hasName()) FunctionNumber = NumberedVals.size()-1; 2777 2778 PerFunctionState PFS(*this, Fn, FunctionNumber); 2779 2780 // We need at least one basic block. 2781 if (Lex.getKind() == lltok::rbrace) 2782 return TokError("function body requires at least one basic block"); 2783 2784 while (Lex.getKind() != lltok::rbrace) 2785 if (ParseBasicBlock(PFS)) return true; 2786 2787 // Eat the }. 2788 Lex.Lex(); 2789 2790 // Verify function is ok. 2791 return PFS.FinishFunction(); 2792} 2793 2794/// ParseBasicBlock 2795/// ::= LabelStr? Instruction* 2796bool LLParser::ParseBasicBlock(PerFunctionState &PFS) { 2797 // If this basic block starts out with a name, remember it. 2798 std::string Name; 2799 LocTy NameLoc = Lex.getLoc(); 2800 if (Lex.getKind() == lltok::LabelStr) { 2801 Name = Lex.getStrVal(); 2802 Lex.Lex(); 2803 } 2804 2805 BasicBlock *BB = PFS.DefineBB(Name, NameLoc); 2806 if (BB == 0) return true; 2807 2808 std::string NameStr; 2809 2810 // Parse the instructions in this block until we get a terminator. 2811 Instruction *Inst; 2812 SmallVector<std::pair<unsigned, MDNode *>, 4> MetadataOnInst; 2813 do { 2814 // This instruction may have three possibilities for a name: a) none 2815 // specified, b) name specified "%foo =", c) number specified: "%4 =". 2816 LocTy NameLoc = Lex.getLoc(); 2817 int NameID = -1; 2818 NameStr = ""; 2819 2820 if (Lex.getKind() == lltok::LocalVarID) { 2821 NameID = Lex.getUIntVal(); 2822 Lex.Lex(); 2823 if (ParseToken(lltok::equal, "expected '=' after instruction id")) 2824 return true; 2825 } else if (Lex.getKind() == lltok::LocalVar) { 2826 NameStr = Lex.getStrVal(); 2827 Lex.Lex(); 2828 if (ParseToken(lltok::equal, "expected '=' after instruction name")) 2829 return true; 2830 } 2831 2832 switch (ParseInstruction(Inst, BB, PFS)) { 2833 default: assert(0 && "Unknown ParseInstruction result!"); 2834 case InstError: return true; 2835 case InstNormal: 2836 BB->getInstList().push_back(Inst); 2837 2838 // With a normal result, we check to see if the instruction is followed by 2839 // a comma and metadata. 2840 if (EatIfPresent(lltok::comma)) 2841 if (ParseInstructionMetadata(Inst, &PFS)) 2842 return true; 2843 break; 2844 case InstExtraComma: 2845 BB->getInstList().push_back(Inst); 2846 2847 // If the instruction parser ate an extra comma at the end of it, it 2848 // *must* be followed by metadata. 2849 if (ParseInstructionMetadata(Inst, &PFS)) 2850 return true; 2851 break; 2852 } 2853 2854 // Set the name on the instruction. 2855 if (PFS.SetInstName(NameID, NameStr, NameLoc, Inst)) return true; 2856 } while (!isa<TerminatorInst>(Inst)); 2857 2858 return false; 2859} 2860 2861//===----------------------------------------------------------------------===// 2862// Instruction Parsing. 2863//===----------------------------------------------------------------------===// 2864 2865/// ParseInstruction - Parse one of the many different instructions. 2866/// 2867int LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB, 2868 PerFunctionState &PFS) { 2869 lltok::Kind Token = Lex.getKind(); 2870 if (Token == lltok::Eof) 2871 return TokError("found end of file when expecting more instructions"); 2872 LocTy Loc = Lex.getLoc(); 2873 unsigned KeywordVal = Lex.getUIntVal(); 2874 Lex.Lex(); // Eat the keyword. 2875 2876 switch (Token) { 2877 default: return Error(Loc, "expected instruction opcode"); 2878 // Terminator Instructions. 2879 case lltok::kw_unwind: Inst = new UnwindInst(Context); return false; 2880 case lltok::kw_unreachable: Inst = new UnreachableInst(Context); return false; 2881 case lltok::kw_ret: return ParseRet(Inst, BB, PFS); 2882 case lltok::kw_br: return ParseBr(Inst, PFS); 2883 case lltok::kw_switch: return ParseSwitch(Inst, PFS); 2884 case lltok::kw_indirectbr: return ParseIndirectBr(Inst, PFS); 2885 case lltok::kw_invoke: return ParseInvoke(Inst, PFS); 2886 case lltok::kw_resume: return ParseResume(Inst, PFS); 2887 // Binary Operators. 2888 case lltok::kw_add: 2889 case lltok::kw_sub: 2890 case lltok::kw_mul: 2891 case lltok::kw_shl: { 2892 bool NUW = EatIfPresent(lltok::kw_nuw); 2893 bool NSW = EatIfPresent(lltok::kw_nsw); 2894 if (!NUW) NUW = EatIfPresent(lltok::kw_nuw); 2895 2896 if (ParseArithmetic(Inst, PFS, KeywordVal, 1)) return true; 2897 2898 if (NUW) cast<BinaryOperator>(Inst)->setHasNoUnsignedWrap(true); 2899 if (NSW) cast<BinaryOperator>(Inst)->setHasNoSignedWrap(true); 2900 return false; 2901 } 2902 case lltok::kw_fadd: 2903 case lltok::kw_fsub: 2904 case lltok::kw_fmul: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2905 2906 case lltok::kw_sdiv: 2907 case lltok::kw_udiv: 2908 case lltok::kw_lshr: 2909 case lltok::kw_ashr: { 2910 bool Exact = EatIfPresent(lltok::kw_exact); 2911 2912 if (ParseArithmetic(Inst, PFS, KeywordVal, 1)) return true; 2913 if (Exact) cast<BinaryOperator>(Inst)->setIsExact(true); 2914 return false; 2915 } 2916 2917 case lltok::kw_urem: 2918 case lltok::kw_srem: return ParseArithmetic(Inst, PFS, KeywordVal, 1); 2919 case lltok::kw_fdiv: 2920 case lltok::kw_frem: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2921 case lltok::kw_and: 2922 case lltok::kw_or: 2923 case lltok::kw_xor: return ParseLogical(Inst, PFS, KeywordVal); 2924 case lltok::kw_icmp: 2925 case lltok::kw_fcmp: return ParseCompare(Inst, PFS, KeywordVal); 2926 // Casts. 2927 case lltok::kw_trunc: 2928 case lltok::kw_zext: 2929 case lltok::kw_sext: 2930 case lltok::kw_fptrunc: 2931 case lltok::kw_fpext: 2932 case lltok::kw_bitcast: 2933 case lltok::kw_uitofp: 2934 case lltok::kw_sitofp: 2935 case lltok::kw_fptoui: 2936 case lltok::kw_fptosi: 2937 case lltok::kw_inttoptr: 2938 case lltok::kw_ptrtoint: return ParseCast(Inst, PFS, KeywordVal); 2939 // Other. 2940 case lltok::kw_select: return ParseSelect(Inst, PFS); 2941 case lltok::kw_va_arg: return ParseVA_Arg(Inst, PFS); 2942 case lltok::kw_extractelement: return ParseExtractElement(Inst, PFS); 2943 case lltok::kw_insertelement: return ParseInsertElement(Inst, PFS); 2944 case lltok::kw_shufflevector: return ParseShuffleVector(Inst, PFS); 2945 case lltok::kw_phi: return ParsePHI(Inst, PFS); 2946 case lltok::kw_landingpad: return ParseLandingPad(Inst, PFS); 2947 case lltok::kw_call: return ParseCall(Inst, PFS, false); 2948 case lltok::kw_tail: return ParseCall(Inst, PFS, true); 2949 // Memory. 2950 case lltok::kw_alloca: return ParseAlloc(Inst, PFS); 2951 case lltok::kw_load: return ParseLoad(Inst, PFS); 2952 case lltok::kw_store: return ParseStore(Inst, PFS); 2953 case lltok::kw_cmpxchg: return ParseCmpXchg(Inst, PFS); 2954 case lltok::kw_atomicrmw: return ParseAtomicRMW(Inst, PFS); 2955 case lltok::kw_fence: return ParseFence(Inst, PFS); 2956 case lltok::kw_getelementptr: return ParseGetElementPtr(Inst, PFS); 2957 case lltok::kw_extractvalue: return ParseExtractValue(Inst, PFS); 2958 case lltok::kw_insertvalue: return ParseInsertValue(Inst, PFS); 2959 } 2960} 2961 2962/// ParseCmpPredicate - Parse an integer or fp predicate, based on Kind. 2963bool LLParser::ParseCmpPredicate(unsigned &P, unsigned Opc) { 2964 if (Opc == Instruction::FCmp) { 2965 switch (Lex.getKind()) { 2966 default: TokError("expected fcmp predicate (e.g. 'oeq')"); 2967 case lltok::kw_oeq: P = CmpInst::FCMP_OEQ; break; 2968 case lltok::kw_one: P = CmpInst::FCMP_ONE; break; 2969 case lltok::kw_olt: P = CmpInst::FCMP_OLT; break; 2970 case lltok::kw_ogt: P = CmpInst::FCMP_OGT; break; 2971 case lltok::kw_ole: P = CmpInst::FCMP_OLE; break; 2972 case lltok::kw_oge: P = CmpInst::FCMP_OGE; break; 2973 case lltok::kw_ord: P = CmpInst::FCMP_ORD; break; 2974 case lltok::kw_uno: P = CmpInst::FCMP_UNO; break; 2975 case lltok::kw_ueq: P = CmpInst::FCMP_UEQ; break; 2976 case lltok::kw_une: P = CmpInst::FCMP_UNE; break; 2977 case lltok::kw_ult: P = CmpInst::FCMP_ULT; break; 2978 case lltok::kw_ugt: P = CmpInst::FCMP_UGT; break; 2979 case lltok::kw_ule: P = CmpInst::FCMP_ULE; break; 2980 case lltok::kw_uge: P = CmpInst::FCMP_UGE; break; 2981 case lltok::kw_true: P = CmpInst::FCMP_TRUE; break; 2982 case lltok::kw_false: P = CmpInst::FCMP_FALSE; break; 2983 } 2984 } else { 2985 switch (Lex.getKind()) { 2986 default: TokError("expected icmp predicate (e.g. 'eq')"); 2987 case lltok::kw_eq: P = CmpInst::ICMP_EQ; break; 2988 case lltok::kw_ne: P = CmpInst::ICMP_NE; break; 2989 case lltok::kw_slt: P = CmpInst::ICMP_SLT; break; 2990 case lltok::kw_sgt: P = CmpInst::ICMP_SGT; break; 2991 case lltok::kw_sle: P = CmpInst::ICMP_SLE; break; 2992 case lltok::kw_sge: P = CmpInst::ICMP_SGE; break; 2993 case lltok::kw_ult: P = CmpInst::ICMP_ULT; break; 2994 case lltok::kw_ugt: P = CmpInst::ICMP_UGT; break; 2995 case lltok::kw_ule: P = CmpInst::ICMP_ULE; break; 2996 case lltok::kw_uge: P = CmpInst::ICMP_UGE; break; 2997 } 2998 } 2999 Lex.Lex(); 3000 return false; 3001} 3002 3003//===----------------------------------------------------------------------===// 3004// Terminator Instructions. 3005//===----------------------------------------------------------------------===// 3006 3007/// ParseRet - Parse a return instruction. 3008/// ::= 'ret' void (',' !dbg, !1)* 3009/// ::= 'ret' TypeAndValue (',' !dbg, !1)* 3010bool LLParser::ParseRet(Instruction *&Inst, BasicBlock *BB, 3011 PerFunctionState &PFS) { 3012 SMLoc TypeLoc = Lex.getLoc(); 3013 Type *Ty = 0; 3014 if (ParseType(Ty, true /*void allowed*/)) return true; 3015 3016 Type *ResType = PFS.getFunction().getReturnType(); 3017 3018 if (Ty->isVoidTy()) { 3019 if (!ResType->isVoidTy()) 3020 return Error(TypeLoc, "value doesn't match function result type '" + 3021 getTypeString(ResType) + "'"); 3022 3023 Inst = ReturnInst::Create(Context); 3024 return false; 3025 } 3026 3027 Value *RV; 3028 if (ParseValue(Ty, RV, PFS)) return true; 3029 3030 if (ResType != RV->getType()) 3031 return Error(TypeLoc, "value doesn't match function result type '" + 3032 getTypeString(ResType) + "'"); 3033 3034 Inst = ReturnInst::Create(Context, RV); 3035 return false; 3036} 3037 3038 3039/// ParseBr 3040/// ::= 'br' TypeAndValue 3041/// ::= 'br' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3042bool LLParser::ParseBr(Instruction *&Inst, PerFunctionState &PFS) { 3043 LocTy Loc, Loc2; 3044 Value *Op0; 3045 BasicBlock *Op1, *Op2; 3046 if (ParseTypeAndValue(Op0, Loc, PFS)) return true; 3047 3048 if (BasicBlock *BB = dyn_cast<BasicBlock>(Op0)) { 3049 Inst = BranchInst::Create(BB); 3050 return false; 3051 } 3052 3053 if (Op0->getType() != Type::getInt1Ty(Context)) 3054 return Error(Loc, "branch condition must have 'i1' type"); 3055 3056 if (ParseToken(lltok::comma, "expected ',' after branch condition") || 3057 ParseTypeAndBasicBlock(Op1, Loc, PFS) || 3058 ParseToken(lltok::comma, "expected ',' after true destination") || 3059 ParseTypeAndBasicBlock(Op2, Loc2, PFS)) 3060 return true; 3061 3062 Inst = BranchInst::Create(Op1, Op2, Op0); 3063 return false; 3064} 3065 3066/// ParseSwitch 3067/// Instruction 3068/// ::= 'switch' TypeAndValue ',' TypeAndValue '[' JumpTable ']' 3069/// JumpTable 3070/// ::= (TypeAndValue ',' TypeAndValue)* 3071bool LLParser::ParseSwitch(Instruction *&Inst, PerFunctionState &PFS) { 3072 LocTy CondLoc, BBLoc; 3073 Value *Cond; 3074 BasicBlock *DefaultBB; 3075 if (ParseTypeAndValue(Cond, CondLoc, PFS) || 3076 ParseToken(lltok::comma, "expected ',' after switch condition") || 3077 ParseTypeAndBasicBlock(DefaultBB, BBLoc, PFS) || 3078 ParseToken(lltok::lsquare, "expected '[' with switch table")) 3079 return true; 3080 3081 if (!Cond->getType()->isIntegerTy()) 3082 return Error(CondLoc, "switch condition must have integer type"); 3083 3084 // Parse the jump table pairs. 3085 SmallPtrSet<Value*, 32> SeenCases; 3086 SmallVector<std::pair<ConstantInt*, BasicBlock*>, 32> Table; 3087 while (Lex.getKind() != lltok::rsquare) { 3088 Value *Constant; 3089 BasicBlock *DestBB; 3090 3091 if (ParseTypeAndValue(Constant, CondLoc, PFS) || 3092 ParseToken(lltok::comma, "expected ',' after case value") || 3093 ParseTypeAndBasicBlock(DestBB, PFS)) 3094 return true; 3095 3096 if (!SeenCases.insert(Constant)) 3097 return Error(CondLoc, "duplicate case value in switch"); 3098 if (!isa<ConstantInt>(Constant)) 3099 return Error(CondLoc, "case value is not a constant integer"); 3100 3101 Table.push_back(std::make_pair(cast<ConstantInt>(Constant), DestBB)); 3102 } 3103 3104 Lex.Lex(); // Eat the ']'. 3105 3106 SwitchInst *SI = SwitchInst::Create(Cond, DefaultBB, Table.size()); 3107 for (unsigned i = 0, e = Table.size(); i != e; ++i) 3108 SI->addCase(Table[i].first, Table[i].second); 3109 Inst = SI; 3110 return false; 3111} 3112 3113/// ParseIndirectBr 3114/// Instruction 3115/// ::= 'indirectbr' TypeAndValue ',' '[' LabelList ']' 3116bool LLParser::ParseIndirectBr(Instruction *&Inst, PerFunctionState &PFS) { 3117 LocTy AddrLoc; 3118 Value *Address; 3119 if (ParseTypeAndValue(Address, AddrLoc, PFS) || 3120 ParseToken(lltok::comma, "expected ',' after indirectbr address") || 3121 ParseToken(lltok::lsquare, "expected '[' with indirectbr")) 3122 return true; 3123 3124 if (!Address->getType()->isPointerTy()) 3125 return Error(AddrLoc, "indirectbr address must have pointer type"); 3126 3127 // Parse the destination list. 3128 SmallVector<BasicBlock*, 16> DestList; 3129 3130 if (Lex.getKind() != lltok::rsquare) { 3131 BasicBlock *DestBB; 3132 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3133 return true; 3134 DestList.push_back(DestBB); 3135 3136 while (EatIfPresent(lltok::comma)) { 3137 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3138 return true; 3139 DestList.push_back(DestBB); 3140 } 3141 } 3142 3143 if (ParseToken(lltok::rsquare, "expected ']' at end of block list")) 3144 return true; 3145 3146 IndirectBrInst *IBI = IndirectBrInst::Create(Address, DestList.size()); 3147 for (unsigned i = 0, e = DestList.size(); i != e; ++i) 3148 IBI->addDestination(DestList[i]); 3149 Inst = IBI; 3150 return false; 3151} 3152 3153 3154/// ParseInvoke 3155/// ::= 'invoke' OptionalCallingConv OptionalAttrs Type Value ParamList 3156/// OptionalAttrs 'to' TypeAndValue 'unwind' TypeAndValue 3157bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) { 3158 LocTy CallLoc = Lex.getLoc(); 3159 unsigned RetAttrs, FnAttrs; 3160 CallingConv::ID CC; 3161 Type *RetType = 0; 3162 LocTy RetTypeLoc; 3163 ValID CalleeID; 3164 SmallVector<ParamInfo, 16> ArgList; 3165 3166 BasicBlock *NormalBB, *UnwindBB; 3167 if (ParseOptionalCallingConv(CC) || 3168 ParseOptionalAttrs(RetAttrs, 1) || 3169 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3170 ParseValID(CalleeID) || 3171 ParseParameterList(ArgList, PFS) || 3172 ParseOptionalAttrs(FnAttrs, 2) || 3173 ParseToken(lltok::kw_to, "expected 'to' in invoke") || 3174 ParseTypeAndBasicBlock(NormalBB, PFS) || 3175 ParseToken(lltok::kw_unwind, "expected 'unwind' in invoke") || 3176 ParseTypeAndBasicBlock(UnwindBB, PFS)) 3177 return true; 3178 3179 // If RetType is a non-function pointer type, then this is the short syntax 3180 // for the call, which means that RetType is just the return type. Infer the 3181 // rest of the function argument types from the arguments that are present. 3182 PointerType *PFTy = 0; 3183 FunctionType *Ty = 0; 3184 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3185 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3186 // Pull out the types of all of the arguments... 3187 std::vector<Type*> ParamTypes; 3188 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3189 ParamTypes.push_back(ArgList[i].V->getType()); 3190 3191 if (!FunctionType::isValidReturnType(RetType)) 3192 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3193 3194 Ty = FunctionType::get(RetType, ParamTypes, false); 3195 PFTy = PointerType::getUnqual(Ty); 3196 } 3197 3198 // Look up the callee. 3199 Value *Callee; 3200 if (ConvertValIDToValue(PFTy, CalleeID, Callee, &PFS)) return true; 3201 3202 // Set up the Attributes for the function. 3203 SmallVector<AttributeWithIndex, 8> Attrs; 3204 if (RetAttrs != Attribute::None) 3205 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3206 3207 SmallVector<Value*, 8> Args; 3208 3209 // Loop through FunctionType's arguments and ensure they are specified 3210 // correctly. Also, gather any parameter attributes. 3211 FunctionType::param_iterator I = Ty->param_begin(); 3212 FunctionType::param_iterator E = Ty->param_end(); 3213 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3214 Type *ExpectedTy = 0; 3215 if (I != E) { 3216 ExpectedTy = *I++; 3217 } else if (!Ty->isVarArg()) { 3218 return Error(ArgList[i].Loc, "too many arguments specified"); 3219 } 3220 3221 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3222 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3223 getTypeString(ExpectedTy) + "'"); 3224 Args.push_back(ArgList[i].V); 3225 if (ArgList[i].Attrs != Attribute::None) 3226 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3227 } 3228 3229 if (I != E) 3230 return Error(CallLoc, "not enough parameters specified for call"); 3231 3232 if (FnAttrs != Attribute::None) 3233 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3234 3235 // Finish off the Attributes and check them 3236 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3237 3238 InvokeInst *II = InvokeInst::Create(Callee, NormalBB, UnwindBB, Args); 3239 II->setCallingConv(CC); 3240 II->setAttributes(PAL); 3241 Inst = II; 3242 return false; 3243} 3244 3245/// ParseResume 3246/// ::= 'resume' TypeAndValue 3247bool LLParser::ParseResume(Instruction *&Inst, PerFunctionState &PFS) { 3248 Value *Exn; LocTy ExnLoc; 3249 if (ParseTypeAndValue(Exn, ExnLoc, PFS)) 3250 return true; 3251 3252 ResumeInst *RI = ResumeInst::Create(Exn); 3253 Inst = RI; 3254 return false; 3255} 3256 3257//===----------------------------------------------------------------------===// 3258// Binary Operators. 3259//===----------------------------------------------------------------------===// 3260 3261/// ParseArithmetic 3262/// ::= ArithmeticOps TypeAndValue ',' Value 3263/// 3264/// If OperandType is 0, then any FP or integer operand is allowed. If it is 1, 3265/// then any integer operand is allowed, if it is 2, any fp operand is allowed. 3266bool LLParser::ParseArithmetic(Instruction *&Inst, PerFunctionState &PFS, 3267 unsigned Opc, unsigned OperandType) { 3268 LocTy Loc; Value *LHS, *RHS; 3269 if (ParseTypeAndValue(LHS, Loc, PFS) || 3270 ParseToken(lltok::comma, "expected ',' in arithmetic operation") || 3271 ParseValue(LHS->getType(), RHS, PFS)) 3272 return true; 3273 3274 bool Valid; 3275 switch (OperandType) { 3276 default: llvm_unreachable("Unknown operand type!"); 3277 case 0: // int or FP. 3278 Valid = LHS->getType()->isIntOrIntVectorTy() || 3279 LHS->getType()->isFPOrFPVectorTy(); 3280 break; 3281 case 1: Valid = LHS->getType()->isIntOrIntVectorTy(); break; 3282 case 2: Valid = LHS->getType()->isFPOrFPVectorTy(); break; 3283 } 3284 3285 if (!Valid) 3286 return Error(Loc, "invalid operand type for instruction"); 3287 3288 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3289 return false; 3290} 3291 3292/// ParseLogical 3293/// ::= ArithmeticOps TypeAndValue ',' Value { 3294bool LLParser::ParseLogical(Instruction *&Inst, PerFunctionState &PFS, 3295 unsigned Opc) { 3296 LocTy Loc; Value *LHS, *RHS; 3297 if (ParseTypeAndValue(LHS, Loc, PFS) || 3298 ParseToken(lltok::comma, "expected ',' in logical operation") || 3299 ParseValue(LHS->getType(), RHS, PFS)) 3300 return true; 3301 3302 if (!LHS->getType()->isIntOrIntVectorTy()) 3303 return Error(Loc,"instruction requires integer or integer vector operands"); 3304 3305 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3306 return false; 3307} 3308 3309 3310/// ParseCompare 3311/// ::= 'icmp' IPredicates TypeAndValue ',' Value 3312/// ::= 'fcmp' FPredicates TypeAndValue ',' Value 3313bool LLParser::ParseCompare(Instruction *&Inst, PerFunctionState &PFS, 3314 unsigned Opc) { 3315 // Parse the integer/fp comparison predicate. 3316 LocTy Loc; 3317 unsigned Pred; 3318 Value *LHS, *RHS; 3319 if (ParseCmpPredicate(Pred, Opc) || 3320 ParseTypeAndValue(LHS, Loc, PFS) || 3321 ParseToken(lltok::comma, "expected ',' after compare value") || 3322 ParseValue(LHS->getType(), RHS, PFS)) 3323 return true; 3324 3325 if (Opc == Instruction::FCmp) { 3326 if (!LHS->getType()->isFPOrFPVectorTy()) 3327 return Error(Loc, "fcmp requires floating point operands"); 3328 Inst = new FCmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3329 } else { 3330 assert(Opc == Instruction::ICmp && "Unknown opcode for CmpInst!"); 3331 if (!LHS->getType()->isIntOrIntVectorTy() && 3332 !LHS->getType()->isPointerTy()) 3333 return Error(Loc, "icmp requires integer operands"); 3334 Inst = new ICmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3335 } 3336 return false; 3337} 3338 3339//===----------------------------------------------------------------------===// 3340// Other Instructions. 3341//===----------------------------------------------------------------------===// 3342 3343 3344/// ParseCast 3345/// ::= CastOpc TypeAndValue 'to' Type 3346bool LLParser::ParseCast(Instruction *&Inst, PerFunctionState &PFS, 3347 unsigned Opc) { 3348 LocTy Loc; 3349 Value *Op; 3350 Type *DestTy = 0; 3351 if (ParseTypeAndValue(Op, Loc, PFS) || 3352 ParseToken(lltok::kw_to, "expected 'to' after cast value") || 3353 ParseType(DestTy)) 3354 return true; 3355 3356 if (!CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy)) { 3357 CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy); 3358 return Error(Loc, "invalid cast opcode for cast from '" + 3359 getTypeString(Op->getType()) + "' to '" + 3360 getTypeString(DestTy) + "'"); 3361 } 3362 Inst = CastInst::Create((Instruction::CastOps)Opc, Op, DestTy); 3363 return false; 3364} 3365 3366/// ParseSelect 3367/// ::= 'select' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3368bool LLParser::ParseSelect(Instruction *&Inst, PerFunctionState &PFS) { 3369 LocTy Loc; 3370 Value *Op0, *Op1, *Op2; 3371 if (ParseTypeAndValue(Op0, Loc, PFS) || 3372 ParseToken(lltok::comma, "expected ',' after select condition") || 3373 ParseTypeAndValue(Op1, PFS) || 3374 ParseToken(lltok::comma, "expected ',' after select value") || 3375 ParseTypeAndValue(Op2, PFS)) 3376 return true; 3377 3378 if (const char *Reason = SelectInst::areInvalidOperands(Op0, Op1, Op2)) 3379 return Error(Loc, Reason); 3380 3381 Inst = SelectInst::Create(Op0, Op1, Op2); 3382 return false; 3383} 3384 3385/// ParseVA_Arg 3386/// ::= 'va_arg' TypeAndValue ',' Type 3387bool LLParser::ParseVA_Arg(Instruction *&Inst, PerFunctionState &PFS) { 3388 Value *Op; 3389 Type *EltTy = 0; 3390 LocTy TypeLoc; 3391 if (ParseTypeAndValue(Op, PFS) || 3392 ParseToken(lltok::comma, "expected ',' after vaarg operand") || 3393 ParseType(EltTy, TypeLoc)) 3394 return true; 3395 3396 if (!EltTy->isFirstClassType()) 3397 return Error(TypeLoc, "va_arg requires operand with first class type"); 3398 3399 Inst = new VAArgInst(Op, EltTy); 3400 return false; 3401} 3402 3403/// ParseExtractElement 3404/// ::= 'extractelement' TypeAndValue ',' TypeAndValue 3405bool LLParser::ParseExtractElement(Instruction *&Inst, PerFunctionState &PFS) { 3406 LocTy Loc; 3407 Value *Op0, *Op1; 3408 if (ParseTypeAndValue(Op0, Loc, PFS) || 3409 ParseToken(lltok::comma, "expected ',' after extract value") || 3410 ParseTypeAndValue(Op1, PFS)) 3411 return true; 3412 3413 if (!ExtractElementInst::isValidOperands(Op0, Op1)) 3414 return Error(Loc, "invalid extractelement operands"); 3415 3416 Inst = ExtractElementInst::Create(Op0, Op1); 3417 return false; 3418} 3419 3420/// ParseInsertElement 3421/// ::= 'insertelement' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3422bool LLParser::ParseInsertElement(Instruction *&Inst, PerFunctionState &PFS) { 3423 LocTy Loc; 3424 Value *Op0, *Op1, *Op2; 3425 if (ParseTypeAndValue(Op0, Loc, PFS) || 3426 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3427 ParseTypeAndValue(Op1, PFS) || 3428 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3429 ParseTypeAndValue(Op2, PFS)) 3430 return true; 3431 3432 if (!InsertElementInst::isValidOperands(Op0, Op1, Op2)) 3433 return Error(Loc, "invalid insertelement operands"); 3434 3435 Inst = InsertElementInst::Create(Op0, Op1, Op2); 3436 return false; 3437} 3438 3439/// ParseShuffleVector 3440/// ::= 'shufflevector' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3441bool LLParser::ParseShuffleVector(Instruction *&Inst, PerFunctionState &PFS) { 3442 LocTy Loc; 3443 Value *Op0, *Op1, *Op2; 3444 if (ParseTypeAndValue(Op0, Loc, PFS) || 3445 ParseToken(lltok::comma, "expected ',' after shuffle mask") || 3446 ParseTypeAndValue(Op1, PFS) || 3447 ParseToken(lltok::comma, "expected ',' after shuffle value") || 3448 ParseTypeAndValue(Op2, PFS)) 3449 return true; 3450 3451 if (!ShuffleVectorInst::isValidOperands(Op0, Op1, Op2)) 3452 return Error(Loc, "invalid extractelement operands"); 3453 3454 Inst = new ShuffleVectorInst(Op0, Op1, Op2); 3455 return false; 3456} 3457 3458/// ParsePHI 3459/// ::= 'phi' Type '[' Value ',' Value ']' (',' '[' Value ',' Value ']')* 3460int LLParser::ParsePHI(Instruction *&Inst, PerFunctionState &PFS) { 3461 Type *Ty = 0; LocTy TypeLoc; 3462 Value *Op0, *Op1; 3463 3464 if (ParseType(Ty, TypeLoc) || 3465 ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3466 ParseValue(Ty, Op0, PFS) || 3467 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3468 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3469 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3470 return true; 3471 3472 bool AteExtraComma = false; 3473 SmallVector<std::pair<Value*, BasicBlock*>, 16> PHIVals; 3474 while (1) { 3475 PHIVals.push_back(std::make_pair(Op0, cast<BasicBlock>(Op1))); 3476 3477 if (!EatIfPresent(lltok::comma)) 3478 break; 3479 3480 if (Lex.getKind() == lltok::MetadataVar) { 3481 AteExtraComma = true; 3482 break; 3483 } 3484 3485 if (ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3486 ParseValue(Ty, Op0, PFS) || 3487 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3488 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3489 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3490 return true; 3491 } 3492 3493 if (!Ty->isFirstClassType()) 3494 return Error(TypeLoc, "phi node must have first class type"); 3495 3496 PHINode *PN = PHINode::Create(Ty, PHIVals.size()); 3497 for (unsigned i = 0, e = PHIVals.size(); i != e; ++i) 3498 PN->addIncoming(PHIVals[i].first, PHIVals[i].second); 3499 Inst = PN; 3500 return AteExtraComma ? InstExtraComma : InstNormal; 3501} 3502 3503/// ParseLandingPad 3504/// ::= 'landingpad' Type 'personality' TypeAndValue 'cleanup'? Clause+ 3505/// Clause 3506/// ::= 'catch' TypeAndValue 3507/// ::= 'filter' 3508/// ::= 'filter' TypeAndValue ( ',' TypeAndValue )* 3509bool LLParser::ParseLandingPad(Instruction *&Inst, PerFunctionState &PFS) { 3510 Type *Ty = 0; LocTy TyLoc; 3511 Value *PersFn; LocTy PersFnLoc; 3512 3513 if (ParseType(Ty, TyLoc) || 3514 ParseToken(lltok::kw_personality, "expected 'personality'") || 3515 ParseTypeAndValue(PersFn, PersFnLoc, PFS)) 3516 return true; 3517 3518 LandingPadInst *LP = LandingPadInst::Create(Ty, PersFn, 0); 3519 LP->setCleanup(EatIfPresent(lltok::kw_cleanup)); 3520 3521 while (Lex.getKind() == lltok::kw_catch || Lex.getKind() == lltok::kw_filter){ 3522 LandingPadInst::ClauseType CT; 3523 if (EatIfPresent(lltok::kw_catch)) 3524 CT = LandingPadInst::Catch; 3525 else if (EatIfPresent(lltok::kw_filter)) 3526 CT = LandingPadInst::Filter; 3527 else 3528 return TokError("expected 'catch' or 'filter' clause type"); 3529 3530 Value *V; LocTy VLoc; 3531 if (ParseTypeAndValue(V, VLoc, PFS)) { 3532 delete LP; 3533 return true; 3534 } 3535 3536 // A 'catch' type expects a non-array constant. A filter clause expects an 3537 // array constant. 3538 if (CT == LandingPadInst::Catch) { 3539 if (isa<ArrayType>(V->getType())) 3540 Error(VLoc, "'catch' clause has an invalid type"); 3541 } else { 3542 if (!isa<ArrayType>(V->getType())) 3543 Error(VLoc, "'filter' clause has an invalid type"); 3544 } 3545 3546 LP->addClause(V); 3547 } 3548 3549 Inst = LP; 3550 return false; 3551} 3552 3553/// ParseCall 3554/// ::= 'tail'? 'call' OptionalCallingConv OptionalAttrs Type Value 3555/// ParameterList OptionalAttrs 3556bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS, 3557 bool isTail) { 3558 unsigned RetAttrs, FnAttrs; 3559 CallingConv::ID CC; 3560 Type *RetType = 0; 3561 LocTy RetTypeLoc; 3562 ValID CalleeID; 3563 SmallVector<ParamInfo, 16> ArgList; 3564 LocTy CallLoc = Lex.getLoc(); 3565 3566 if ((isTail && ParseToken(lltok::kw_call, "expected 'tail call'")) || 3567 ParseOptionalCallingConv(CC) || 3568 ParseOptionalAttrs(RetAttrs, 1) || 3569 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3570 ParseValID(CalleeID) || 3571 ParseParameterList(ArgList, PFS) || 3572 ParseOptionalAttrs(FnAttrs, 2)) 3573 return true; 3574 3575 // If RetType is a non-function pointer type, then this is the short syntax 3576 // for the call, which means that RetType is just the return type. Infer the 3577 // rest of the function argument types from the arguments that are present. 3578 PointerType *PFTy = 0; 3579 FunctionType *Ty = 0; 3580 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3581 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3582 // Pull out the types of all of the arguments... 3583 std::vector<Type*> ParamTypes; 3584 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3585 ParamTypes.push_back(ArgList[i].V->getType()); 3586 3587 if (!FunctionType::isValidReturnType(RetType)) 3588 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3589 3590 Ty = FunctionType::get(RetType, ParamTypes, false); 3591 PFTy = PointerType::getUnqual(Ty); 3592 } 3593 3594 // Look up the callee. 3595 Value *Callee; 3596 if (ConvertValIDToValue(PFTy, CalleeID, Callee, &PFS)) return true; 3597 3598 // Set up the Attributes for the function. 3599 SmallVector<AttributeWithIndex, 8> Attrs; 3600 if (RetAttrs != Attribute::None) 3601 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3602 3603 SmallVector<Value*, 8> Args; 3604 3605 // Loop through FunctionType's arguments and ensure they are specified 3606 // correctly. Also, gather any parameter attributes. 3607 FunctionType::param_iterator I = Ty->param_begin(); 3608 FunctionType::param_iterator E = Ty->param_end(); 3609 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3610 Type *ExpectedTy = 0; 3611 if (I != E) { 3612 ExpectedTy = *I++; 3613 } else if (!Ty->isVarArg()) { 3614 return Error(ArgList[i].Loc, "too many arguments specified"); 3615 } 3616 3617 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3618 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3619 getTypeString(ExpectedTy) + "'"); 3620 Args.push_back(ArgList[i].V); 3621 if (ArgList[i].Attrs != Attribute::None) 3622 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3623 } 3624 3625 if (I != E) 3626 return Error(CallLoc, "not enough parameters specified for call"); 3627 3628 if (FnAttrs != Attribute::None) 3629 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3630 3631 // Finish off the Attributes and check them 3632 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3633 3634 CallInst *CI = CallInst::Create(Callee, Args); 3635 CI->setTailCall(isTail); 3636 CI->setCallingConv(CC); 3637 CI->setAttributes(PAL); 3638 Inst = CI; 3639 return false; 3640} 3641 3642//===----------------------------------------------------------------------===// 3643// Memory Instructions. 3644//===----------------------------------------------------------------------===// 3645 3646/// ParseAlloc 3647/// ::= 'alloca' Type (',' TypeAndValue)? (',' OptionalInfo)? 3648int LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS) { 3649 Value *Size = 0; 3650 LocTy SizeLoc; 3651 unsigned Alignment = 0; 3652 Type *Ty = 0; 3653 if (ParseType(Ty)) return true; 3654 3655 bool AteExtraComma = false; 3656 if (EatIfPresent(lltok::comma)) { 3657 if (Lex.getKind() == lltok::kw_align) { 3658 if (ParseOptionalAlignment(Alignment)) return true; 3659 } else if (Lex.getKind() == lltok::MetadataVar) { 3660 AteExtraComma = true; 3661 } else { 3662 if (ParseTypeAndValue(Size, SizeLoc, PFS) || 3663 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3664 return true; 3665 } 3666 } 3667 3668 if (Size && !Size->getType()->isIntegerTy()) 3669 return Error(SizeLoc, "element count must have integer type"); 3670 3671 Inst = new AllocaInst(Ty, Size, Alignment); 3672 return AteExtraComma ? InstExtraComma : InstNormal; 3673} 3674 3675/// ParseLoad 3676/// ::= 'load' 'volatile'? TypeAndValue (',' 'align' i32)? 3677/// ::= 'load' 'atomic' 'volatile'? TypeAndValue 3678/// 'singlethread'? AtomicOrdering (',' 'align' i32)? 3679int LLParser::ParseLoad(Instruction *&Inst, PerFunctionState &PFS) { 3680 Value *Val; LocTy Loc; 3681 unsigned Alignment = 0; 3682 bool AteExtraComma = false; 3683 bool isAtomic = false; 3684 AtomicOrdering Ordering = NotAtomic; 3685 SynchronizationScope Scope = CrossThread; 3686 3687 if (Lex.getKind() == lltok::kw_atomic) { 3688 isAtomic = true; 3689 Lex.Lex(); 3690 } 3691 3692 bool isVolatile = false; 3693 if (Lex.getKind() == lltok::kw_volatile) { 3694 isVolatile = true; 3695 Lex.Lex(); 3696 } 3697 3698 if (ParseTypeAndValue(Val, Loc, PFS) || 3699 ParseScopeAndOrdering(isAtomic, Scope, Ordering) || 3700 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3701 return true; 3702 3703 if (!Val->getType()->isPointerTy() || 3704 !cast<PointerType>(Val->getType())->getElementType()->isFirstClassType()) 3705 return Error(Loc, "load operand must be a pointer to a first class type"); 3706 if (isAtomic && !Alignment) 3707 return Error(Loc, "atomic load must have explicit non-zero alignment"); 3708 if (Ordering == Release || Ordering == AcquireRelease) 3709 return Error(Loc, "atomic load cannot use Release ordering"); 3710 3711 Inst = new LoadInst(Val, "", isVolatile, Alignment, Ordering, Scope); 3712 return AteExtraComma ? InstExtraComma : InstNormal; 3713} 3714 3715/// ParseStore 3716 3717/// ::= 'store' 'volatile'? TypeAndValue ',' TypeAndValue (',' 'align' i32)? 3718/// ::= 'store' 'atomic' 'volatile'? TypeAndValue ',' TypeAndValue 3719/// 'singlethread'? AtomicOrdering (',' 'align' i32)? 3720int LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS) { 3721 Value *Val, *Ptr; LocTy Loc, PtrLoc; 3722 unsigned Alignment = 0; 3723 bool AteExtraComma = false; 3724 bool isAtomic = false; 3725 AtomicOrdering Ordering = NotAtomic; 3726 SynchronizationScope Scope = CrossThread; 3727 3728 if (Lex.getKind() == lltok::kw_atomic) { 3729 isAtomic = true; 3730 Lex.Lex(); 3731 } 3732 3733 bool isVolatile = false; 3734 if (Lex.getKind() == lltok::kw_volatile) { 3735 isVolatile = true; 3736 Lex.Lex(); 3737 } 3738 3739 if (ParseTypeAndValue(Val, Loc, PFS) || 3740 ParseToken(lltok::comma, "expected ',' after store operand") || 3741 ParseTypeAndValue(Ptr, PtrLoc, PFS) || 3742 ParseScopeAndOrdering(isAtomic, Scope, Ordering) || 3743 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3744 return true; 3745 3746 if (!Ptr->getType()->isPointerTy()) 3747 return Error(PtrLoc, "store operand must be a pointer"); 3748 if (!Val->getType()->isFirstClassType()) 3749 return Error(Loc, "store operand must be a first class value"); 3750 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType()) 3751 return Error(Loc, "stored value and pointer type do not match"); 3752 if (isAtomic && !Alignment) 3753 return Error(Loc, "atomic store must have explicit non-zero alignment"); 3754 if (Ordering == Acquire || Ordering == AcquireRelease) 3755 return Error(Loc, "atomic store cannot use Acquire ordering"); 3756 3757 Inst = new StoreInst(Val, Ptr, isVolatile, Alignment, Ordering, Scope); 3758 return AteExtraComma ? InstExtraComma : InstNormal; 3759} 3760 3761/// ParseCmpXchg 3762/// ::= 'cmpxchg' 'volatile'? TypeAndValue ',' TypeAndValue ',' TypeAndValue 3763/// 'singlethread'? AtomicOrdering 3764int LLParser::ParseCmpXchg(Instruction *&Inst, PerFunctionState &PFS) { 3765 Value *Ptr, *Cmp, *New; LocTy PtrLoc, CmpLoc, NewLoc; 3766 bool AteExtraComma = false; 3767 AtomicOrdering Ordering = NotAtomic; 3768 SynchronizationScope Scope = CrossThread; 3769 bool isVolatile = false; 3770 3771 if (EatIfPresent(lltok::kw_volatile)) 3772 isVolatile = true; 3773 3774 if (ParseTypeAndValue(Ptr, PtrLoc, PFS) || 3775 ParseToken(lltok::comma, "expected ',' after cmpxchg address") || 3776 ParseTypeAndValue(Cmp, CmpLoc, PFS) || 3777 ParseToken(lltok::comma, "expected ',' after cmpxchg cmp operand") || 3778 ParseTypeAndValue(New, NewLoc, PFS) || 3779 ParseScopeAndOrdering(true /*Always atomic*/, Scope, Ordering)) 3780 return true; 3781 3782 if (Ordering == Unordered) 3783 return TokError("cmpxchg cannot be unordered"); 3784 if (!Ptr->getType()->isPointerTy()) 3785 return Error(PtrLoc, "cmpxchg operand must be a pointer"); 3786 if (cast<PointerType>(Ptr->getType())->getElementType() != Cmp->getType()) 3787 return Error(CmpLoc, "compare value and pointer type do not match"); 3788 if (cast<PointerType>(Ptr->getType())->getElementType() != New->getType()) 3789 return Error(NewLoc, "new value and pointer type do not match"); 3790 if (!New->getType()->isIntegerTy()) 3791 return Error(NewLoc, "cmpxchg operand must be an integer"); 3792 unsigned Size = New->getType()->getPrimitiveSizeInBits(); 3793 if (Size < 8 || (Size & (Size - 1))) 3794 return Error(NewLoc, "cmpxchg operand must be power-of-two byte-sized" 3795 " integer"); 3796 3797 AtomicCmpXchgInst *CXI = 3798 new AtomicCmpXchgInst(Ptr, Cmp, New, Ordering, Scope); 3799 CXI->setVolatile(isVolatile); 3800 Inst = CXI; 3801 return AteExtraComma ? InstExtraComma : InstNormal; 3802} 3803 3804/// ParseAtomicRMW 3805/// ::= 'atomicrmw' 'volatile'? BinOp TypeAndValue ',' TypeAndValue 3806/// 'singlethread'? AtomicOrdering 3807int LLParser::ParseAtomicRMW(Instruction *&Inst, PerFunctionState &PFS) { 3808 Value *Ptr, *Val; LocTy PtrLoc, ValLoc; 3809 bool AteExtraComma = false; 3810 AtomicOrdering Ordering = NotAtomic; 3811 SynchronizationScope Scope = CrossThread; 3812 bool isVolatile = false; 3813 AtomicRMWInst::BinOp Operation; 3814 3815 if (EatIfPresent(lltok::kw_volatile)) 3816 isVolatile = true; 3817 3818 switch (Lex.getKind()) { 3819 default: return TokError("expected binary operation in atomicrmw"); 3820 case lltok::kw_xchg: Operation = AtomicRMWInst::Xchg; break; 3821 case lltok::kw_add: Operation = AtomicRMWInst::Add; break; 3822 case lltok::kw_sub: Operation = AtomicRMWInst::Sub; break; 3823 case lltok::kw_and: Operation = AtomicRMWInst::And; break; 3824 case lltok::kw_nand: Operation = AtomicRMWInst::Nand; break; 3825 case lltok::kw_or: Operation = AtomicRMWInst::Or; break; 3826 case lltok::kw_xor: Operation = AtomicRMWInst::Xor; break; 3827 case lltok::kw_max: Operation = AtomicRMWInst::Max; break; 3828 case lltok::kw_min: Operation = AtomicRMWInst::Min; break; 3829 case lltok::kw_umax: Operation = AtomicRMWInst::UMax; break; 3830 case lltok::kw_umin: Operation = AtomicRMWInst::UMin; break; 3831 } 3832 Lex.Lex(); // Eat the operation. 3833 3834 if (ParseTypeAndValue(Ptr, PtrLoc, PFS) || 3835 ParseToken(lltok::comma, "expected ',' after atomicrmw address") || 3836 ParseTypeAndValue(Val, ValLoc, PFS) || 3837 ParseScopeAndOrdering(true /*Always atomic*/, Scope, Ordering)) 3838 return true; 3839 3840 if (Ordering == Unordered) 3841 return TokError("atomicrmw cannot be unordered"); 3842 if (!Ptr->getType()->isPointerTy()) 3843 return Error(PtrLoc, "atomicrmw operand must be a pointer"); 3844 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType()) 3845 return Error(ValLoc, "atomicrmw value and pointer type do not match"); 3846 if (!Val->getType()->isIntegerTy()) 3847 return Error(ValLoc, "atomicrmw operand must be an integer"); 3848 unsigned Size = Val->getType()->getPrimitiveSizeInBits(); 3849 if (Size < 8 || (Size & (Size - 1))) 3850 return Error(ValLoc, "atomicrmw operand must be power-of-two byte-sized" 3851 " integer"); 3852 3853 AtomicRMWInst *RMWI = 3854 new AtomicRMWInst(Operation, Ptr, Val, Ordering, Scope); 3855 RMWI->setVolatile(isVolatile); 3856 Inst = RMWI; 3857 return AteExtraComma ? InstExtraComma : InstNormal; 3858} 3859 3860/// ParseFence 3861/// ::= 'fence' 'singlethread'? AtomicOrdering 3862int LLParser::ParseFence(Instruction *&Inst, PerFunctionState &PFS) { 3863 AtomicOrdering Ordering = NotAtomic; 3864 SynchronizationScope Scope = CrossThread; 3865 if (ParseScopeAndOrdering(true /*Always atomic*/, Scope, Ordering)) 3866 return true; 3867 3868 if (Ordering == Unordered) 3869 return TokError("fence cannot be unordered"); 3870 if (Ordering == Monotonic) 3871 return TokError("fence cannot be monotonic"); 3872 3873 Inst = new FenceInst(Context, Ordering, Scope); 3874 return InstNormal; 3875} 3876 3877/// ParseGetElementPtr 3878/// ::= 'getelementptr' 'inbounds'? TypeAndValue (',' TypeAndValue)* 3879int LLParser::ParseGetElementPtr(Instruction *&Inst, PerFunctionState &PFS) { 3880 Value *Ptr, *Val; LocTy Loc, EltLoc; 3881 3882 bool InBounds = EatIfPresent(lltok::kw_inbounds); 3883 3884 if (ParseTypeAndValue(Ptr, Loc, PFS)) return true; 3885 3886 if (!Ptr->getType()->isPointerTy()) 3887 return Error(Loc, "base of getelementptr must be a pointer"); 3888 3889 SmallVector<Value*, 16> Indices; 3890 bool AteExtraComma = false; 3891 while (EatIfPresent(lltok::comma)) { 3892 if (Lex.getKind() == lltok::MetadataVar) { 3893 AteExtraComma = true; 3894 break; 3895 } 3896 if (ParseTypeAndValue(Val, EltLoc, PFS)) return true; 3897 if (!Val->getType()->isIntegerTy()) 3898 return Error(EltLoc, "getelementptr index must be an integer"); 3899 Indices.push_back(Val); 3900 } 3901 3902 if (!GetElementPtrInst::getIndexedType(Ptr->getType(), Indices)) 3903 return Error(Loc, "invalid getelementptr indices"); 3904 Inst = GetElementPtrInst::Create(Ptr, Indices); 3905 if (InBounds) 3906 cast<GetElementPtrInst>(Inst)->setIsInBounds(true); 3907 return AteExtraComma ? InstExtraComma : InstNormal; 3908} 3909 3910/// ParseExtractValue 3911/// ::= 'extractvalue' TypeAndValue (',' uint32)+ 3912int LLParser::ParseExtractValue(Instruction *&Inst, PerFunctionState &PFS) { 3913 Value *Val; LocTy Loc; 3914 SmallVector<unsigned, 4> Indices; 3915 bool AteExtraComma; 3916 if (ParseTypeAndValue(Val, Loc, PFS) || 3917 ParseIndexList(Indices, AteExtraComma)) 3918 return true; 3919 3920 if (!Val->getType()->isAggregateType()) 3921 return Error(Loc, "extractvalue operand must be aggregate type"); 3922 3923 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices)) 3924 return Error(Loc, "invalid indices for extractvalue"); 3925 Inst = ExtractValueInst::Create(Val, Indices); 3926 return AteExtraComma ? InstExtraComma : InstNormal; 3927} 3928 3929/// ParseInsertValue 3930/// ::= 'insertvalue' TypeAndValue ',' TypeAndValue (',' uint32)+ 3931int LLParser::ParseInsertValue(Instruction *&Inst, PerFunctionState &PFS) { 3932 Value *Val0, *Val1; LocTy Loc0, Loc1; 3933 SmallVector<unsigned, 4> Indices; 3934 bool AteExtraComma; 3935 if (ParseTypeAndValue(Val0, Loc0, PFS) || 3936 ParseToken(lltok::comma, "expected comma after insertvalue operand") || 3937 ParseTypeAndValue(Val1, Loc1, PFS) || 3938 ParseIndexList(Indices, AteExtraComma)) 3939 return true; 3940 3941 if (!Val0->getType()->isAggregateType()) 3942 return Error(Loc0, "insertvalue operand must be aggregate type"); 3943 3944 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices)) 3945 return Error(Loc0, "invalid indices for insertvalue"); 3946 Inst = InsertValueInst::Create(Val0, Val1, Indices); 3947 return AteExtraComma ? InstExtraComma : InstNormal; 3948} 3949 3950//===----------------------------------------------------------------------===// 3951// Embedded metadata. 3952//===----------------------------------------------------------------------===// 3953 3954/// ParseMDNodeVector 3955/// ::= Element (',' Element)* 3956/// Element 3957/// ::= 'null' | TypeAndValue 3958bool LLParser::ParseMDNodeVector(SmallVectorImpl<Value*> &Elts, 3959 PerFunctionState *PFS) { 3960 // Check for an empty list. 3961 if (Lex.getKind() == lltok::rbrace) 3962 return false; 3963 3964 do { 3965 // Null is a special case since it is typeless. 3966 if (EatIfPresent(lltok::kw_null)) { 3967 Elts.push_back(0); 3968 continue; 3969 } 3970 3971 Value *V = 0; 3972 if (ParseTypeAndValue(V, PFS)) return true; 3973 Elts.push_back(V); 3974 } while (EatIfPresent(lltok::comma)); 3975 3976 return false; 3977} 3978