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: // FIXME: backwards compat. 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_linkonce_odr_auto_hide: // OptionalLinkage 194 case lltok::kw_appending: // OptionalLinkage 195 case lltok::kw_dllexport: // OptionalLinkage 196 case lltok::kw_common: // OptionalLinkage 197 case lltok::kw_dllimport: // OptionalLinkage 198 case lltok::kw_extern_weak: // OptionalLinkage 199 case lltok::kw_external: { // OptionalLinkage 200 unsigned Linkage, Visibility; 201 if (ParseOptionalLinkage(Linkage) || 202 ParseOptionalVisibility(Visibility) || 203 ParseGlobal("", SMLoc(), Linkage, true, Visibility)) 204 return true; 205 break; 206 } 207 case lltok::kw_default: // OptionalVisibility 208 case lltok::kw_hidden: // OptionalVisibility 209 case lltok::kw_protected: { // OptionalVisibility 210 unsigned Visibility; 211 if (ParseOptionalVisibility(Visibility) || 212 ParseGlobal("", SMLoc(), 0, false, Visibility)) 213 return true; 214 break; 215 } 216 217 case lltok::kw_thread_local: // OptionalThreadLocal 218 case lltok::kw_addrspace: // OptionalAddrSpace 219 case lltok::kw_constant: // GlobalType 220 case lltok::kw_global: // GlobalType 221 if (ParseGlobal("", SMLoc(), 0, false, 0)) return true; 222 break; 223 } 224 } 225} 226 227 228/// toplevelentity 229/// ::= 'module' 'asm' STRINGCONSTANT 230bool LLParser::ParseModuleAsm() { 231 assert(Lex.getKind() == lltok::kw_module); 232 Lex.Lex(); 233 234 std::string AsmStr; 235 if (ParseToken(lltok::kw_asm, "expected 'module asm'") || 236 ParseStringConstant(AsmStr)) return true; 237 238 M->appendModuleInlineAsm(AsmStr); 239 return false; 240} 241 242/// toplevelentity 243/// ::= 'target' 'triple' '=' STRINGCONSTANT 244/// ::= 'target' 'datalayout' '=' STRINGCONSTANT 245bool LLParser::ParseTargetDefinition() { 246 assert(Lex.getKind() == lltok::kw_target); 247 std::string Str; 248 switch (Lex.Lex()) { 249 default: return TokError("unknown target property"); 250 case lltok::kw_triple: 251 Lex.Lex(); 252 if (ParseToken(lltok::equal, "expected '=' after target triple") || 253 ParseStringConstant(Str)) 254 return true; 255 M->setTargetTriple(Str); 256 return false; 257 case lltok::kw_datalayout: 258 Lex.Lex(); 259 if (ParseToken(lltok::equal, "expected '=' after target datalayout") || 260 ParseStringConstant(Str)) 261 return true; 262 M->setDataLayout(Str); 263 return false; 264 } 265} 266 267/// toplevelentity 268/// ::= 'deplibs' '=' '[' ']' 269/// ::= 'deplibs' '=' '[' STRINGCONSTANT (',' STRINGCONSTANT)* ']' 270bool LLParser::ParseDepLibs() { 271 assert(Lex.getKind() == lltok::kw_deplibs); 272 Lex.Lex(); 273 if (ParseToken(lltok::equal, "expected '=' after deplibs") || 274 ParseToken(lltok::lsquare, "expected '=' after deplibs")) 275 return true; 276 277 if (EatIfPresent(lltok::rsquare)) 278 return false; 279 280 std::string Str; 281 if (ParseStringConstant(Str)) return true; 282 M->addLibrary(Str); 283 284 while (EatIfPresent(lltok::comma)) { 285 if (ParseStringConstant(Str)) return true; 286 M->addLibrary(Str); 287 } 288 289 return ParseToken(lltok::rsquare, "expected ']' at end of list"); 290} 291 292/// ParseUnnamedType: 293/// ::= LocalVarID '=' 'type' type 294bool LLParser::ParseUnnamedType() { 295 LocTy TypeLoc = Lex.getLoc(); 296 unsigned TypeID = Lex.getUIntVal(); 297 Lex.Lex(); // eat LocalVarID; 298 299 if (ParseToken(lltok::equal, "expected '=' after name") || 300 ParseToken(lltok::kw_type, "expected 'type' after '='")) 301 return true; 302 303 if (TypeID >= NumberedTypes.size()) 304 NumberedTypes.resize(TypeID+1); 305 306 Type *Result = 0; 307 if (ParseStructDefinition(TypeLoc, "", 308 NumberedTypes[TypeID], Result)) return true; 309 310 if (!isa<StructType>(Result)) { 311 std::pair<Type*, LocTy> &Entry = NumberedTypes[TypeID]; 312 if (Entry.first) 313 return Error(TypeLoc, "non-struct types may not be recursive"); 314 Entry.first = Result; 315 Entry.second = SMLoc(); 316 } 317 318 return false; 319} 320 321 322/// toplevelentity 323/// ::= LocalVar '=' 'type' type 324bool LLParser::ParseNamedType() { 325 std::string Name = Lex.getStrVal(); 326 LocTy NameLoc = Lex.getLoc(); 327 Lex.Lex(); // eat LocalVar. 328 329 if (ParseToken(lltok::equal, "expected '=' after name") || 330 ParseToken(lltok::kw_type, "expected 'type' after name")) 331 return true; 332 333 Type *Result = 0; 334 if (ParseStructDefinition(NameLoc, Name, 335 NamedTypes[Name], Result)) return true; 336 337 if (!isa<StructType>(Result)) { 338 std::pair<Type*, LocTy> &Entry = NamedTypes[Name]; 339 if (Entry.first) 340 return Error(NameLoc, "non-struct types may not be recursive"); 341 Entry.first = Result; 342 Entry.second = SMLoc(); 343 } 344 345 return false; 346} 347 348 349/// toplevelentity 350/// ::= 'declare' FunctionHeader 351bool LLParser::ParseDeclare() { 352 assert(Lex.getKind() == lltok::kw_declare); 353 Lex.Lex(); 354 355 Function *F; 356 return ParseFunctionHeader(F, false); 357} 358 359/// toplevelentity 360/// ::= 'define' FunctionHeader '{' ... 361bool LLParser::ParseDefine() { 362 assert(Lex.getKind() == lltok::kw_define); 363 Lex.Lex(); 364 365 Function *F; 366 return ParseFunctionHeader(F, true) || 367 ParseFunctionBody(*F); 368} 369 370/// ParseGlobalType 371/// ::= 'constant' 372/// ::= 'global' 373bool LLParser::ParseGlobalType(bool &IsConstant) { 374 if (Lex.getKind() == lltok::kw_constant) 375 IsConstant = true; 376 else if (Lex.getKind() == lltok::kw_global) 377 IsConstant = false; 378 else { 379 IsConstant = false; 380 return TokError("expected 'global' or 'constant'"); 381 } 382 Lex.Lex(); 383 return false; 384} 385 386/// ParseUnnamedGlobal: 387/// OptionalVisibility ALIAS ... 388/// OptionalLinkage OptionalVisibility ... -> global variable 389/// GlobalID '=' OptionalVisibility ALIAS ... 390/// GlobalID '=' OptionalLinkage OptionalVisibility ... -> global variable 391bool LLParser::ParseUnnamedGlobal() { 392 unsigned VarID = NumberedVals.size(); 393 std::string Name; 394 LocTy NameLoc = Lex.getLoc(); 395 396 // Handle the GlobalID form. 397 if (Lex.getKind() == lltok::GlobalID) { 398 if (Lex.getUIntVal() != VarID) 399 return Error(Lex.getLoc(), "variable expected to be numbered '%" + 400 Twine(VarID) + "'"); 401 Lex.Lex(); // eat GlobalID; 402 403 if (ParseToken(lltok::equal, "expected '=' after name")) 404 return true; 405 } 406 407 bool HasLinkage; 408 unsigned Linkage, Visibility; 409 if (ParseOptionalLinkage(Linkage, HasLinkage) || 410 ParseOptionalVisibility(Visibility)) 411 return true; 412 413 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 414 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 415 return ParseAlias(Name, NameLoc, Visibility); 416} 417 418/// ParseNamedGlobal: 419/// GlobalVar '=' OptionalVisibility ALIAS ... 420/// GlobalVar '=' OptionalLinkage OptionalVisibility ... -> global variable 421bool LLParser::ParseNamedGlobal() { 422 assert(Lex.getKind() == lltok::GlobalVar); 423 LocTy NameLoc = Lex.getLoc(); 424 std::string Name = Lex.getStrVal(); 425 Lex.Lex(); 426 427 bool HasLinkage; 428 unsigned Linkage, Visibility; 429 if (ParseToken(lltok::equal, "expected '=' in global variable") || 430 ParseOptionalLinkage(Linkage, HasLinkage) || 431 ParseOptionalVisibility(Visibility)) 432 return true; 433 434 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 435 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 436 return ParseAlias(Name, NameLoc, Visibility); 437} 438 439// MDString: 440// ::= '!' STRINGCONSTANT 441bool LLParser::ParseMDString(MDString *&Result) { 442 std::string Str; 443 if (ParseStringConstant(Str)) return true; 444 Result = MDString::get(Context, Str); 445 return false; 446} 447 448// MDNode: 449// ::= '!' MDNodeNumber 450// 451/// This version of ParseMDNodeID returns the slot number and null in the case 452/// of a forward reference. 453bool LLParser::ParseMDNodeID(MDNode *&Result, unsigned &SlotNo) { 454 // !{ ..., !42, ... } 455 if (ParseUInt32(SlotNo)) return true; 456 457 // Check existing MDNode. 458 if (SlotNo < NumberedMetadata.size() && NumberedMetadata[SlotNo] != 0) 459 Result = NumberedMetadata[SlotNo]; 460 else 461 Result = 0; 462 return false; 463} 464 465bool LLParser::ParseMDNodeID(MDNode *&Result) { 466 // !{ ..., !42, ... } 467 unsigned MID = 0; 468 if (ParseMDNodeID(Result, MID)) return true; 469 470 // If not a forward reference, just return it now. 471 if (Result) return false; 472 473 // Otherwise, create MDNode forward reference. 474 MDNode *FwdNode = MDNode::getTemporary(Context, ArrayRef<Value*>()); 475 ForwardRefMDNodes[MID] = std::make_pair(FwdNode, Lex.getLoc()); 476 477 if (NumberedMetadata.size() <= MID) 478 NumberedMetadata.resize(MID+1); 479 NumberedMetadata[MID] = FwdNode; 480 Result = FwdNode; 481 return false; 482} 483 484/// ParseNamedMetadata: 485/// !foo = !{ !1, !2 } 486bool LLParser::ParseNamedMetadata() { 487 assert(Lex.getKind() == lltok::MetadataVar); 488 std::string Name = Lex.getStrVal(); 489 Lex.Lex(); 490 491 if (ParseToken(lltok::equal, "expected '=' here") || 492 ParseToken(lltok::exclaim, "Expected '!' here") || 493 ParseToken(lltok::lbrace, "Expected '{' here")) 494 return true; 495 496 NamedMDNode *NMD = M->getOrInsertNamedMetadata(Name); 497 if (Lex.getKind() != lltok::rbrace) 498 do { 499 if (ParseToken(lltok::exclaim, "Expected '!' here")) 500 return true; 501 502 MDNode *N = 0; 503 if (ParseMDNodeID(N)) return true; 504 NMD->addOperand(N); 505 } while (EatIfPresent(lltok::comma)); 506 507 if (ParseToken(lltok::rbrace, "expected end of metadata node")) 508 return true; 509 510 return false; 511} 512 513/// ParseStandaloneMetadata: 514/// !42 = !{...} 515bool LLParser::ParseStandaloneMetadata() { 516 assert(Lex.getKind() == lltok::exclaim); 517 Lex.Lex(); 518 unsigned MetadataID = 0; 519 520 LocTy TyLoc; 521 Type *Ty = 0; 522 SmallVector<Value *, 16> Elts; 523 if (ParseUInt32(MetadataID) || 524 ParseToken(lltok::equal, "expected '=' here") || 525 ParseType(Ty, TyLoc) || 526 ParseToken(lltok::exclaim, "Expected '!' here") || 527 ParseToken(lltok::lbrace, "Expected '{' here") || 528 ParseMDNodeVector(Elts, NULL) || 529 ParseToken(lltok::rbrace, "expected end of metadata node")) 530 return true; 531 532 MDNode *Init = MDNode::get(Context, Elts); 533 534 // See if this was forward referenced, if so, handle it. 535 std::map<unsigned, std::pair<TrackingVH<MDNode>, LocTy> >::iterator 536 FI = ForwardRefMDNodes.find(MetadataID); 537 if (FI != ForwardRefMDNodes.end()) { 538 MDNode *Temp = FI->second.first; 539 Temp->replaceAllUsesWith(Init); 540 MDNode::deleteTemporary(Temp); 541 ForwardRefMDNodes.erase(FI); 542 543 assert(NumberedMetadata[MetadataID] == Init && "Tracking VH didn't work"); 544 } else { 545 if (MetadataID >= NumberedMetadata.size()) 546 NumberedMetadata.resize(MetadataID+1); 547 548 if (NumberedMetadata[MetadataID] != 0) 549 return TokError("Metadata id is already used"); 550 NumberedMetadata[MetadataID] = Init; 551 } 552 553 return false; 554} 555 556/// ParseAlias: 557/// ::= GlobalVar '=' OptionalVisibility 'alias' OptionalLinkage Aliasee 558/// Aliasee 559/// ::= TypeAndValue 560/// ::= 'bitcast' '(' TypeAndValue 'to' Type ')' 561/// ::= 'getelementptr' 'inbounds'? '(' ... ')' 562/// 563/// Everything through visibility has already been parsed. 564/// 565bool LLParser::ParseAlias(const std::string &Name, LocTy NameLoc, 566 unsigned Visibility) { 567 assert(Lex.getKind() == lltok::kw_alias); 568 Lex.Lex(); 569 unsigned Linkage; 570 LocTy LinkageLoc = Lex.getLoc(); 571 if (ParseOptionalLinkage(Linkage)) 572 return true; 573 574 if (Linkage != GlobalValue::ExternalLinkage && 575 Linkage != GlobalValue::WeakAnyLinkage && 576 Linkage != GlobalValue::WeakODRLinkage && 577 Linkage != GlobalValue::InternalLinkage && 578 Linkage != GlobalValue::PrivateLinkage && 579 Linkage != GlobalValue::LinkerPrivateLinkage && 580 Linkage != GlobalValue::LinkerPrivateWeakLinkage) 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 IsConstant, UnnamedAddr; 649 GlobalVariable::ThreadLocalMode TLM; 650 LocTy UnnamedAddrLoc; 651 LocTy TyLoc; 652 653 Type *Ty = 0; 654 if (ParseOptionalThreadLocal(TLM) || 655 ParseOptionalAddrSpace(AddrSpace) || 656 ParseOptionalToken(lltok::kw_unnamed_addr, UnnamedAddr, 657 &UnnamedAddrLoc) || 658 ParseGlobalType(IsConstant) || 659 ParseType(Ty, TyLoc)) 660 return true; 661 662 // If the linkage is specified and is external, then no initializer is 663 // present. 664 Constant *Init = 0; 665 if (!HasLinkage || (Linkage != GlobalValue::DLLImportLinkage && 666 Linkage != GlobalValue::ExternalWeakLinkage && 667 Linkage != GlobalValue::ExternalLinkage)) { 668 if (ParseGlobalValue(Ty, Init)) 669 return true; 670 } 671 672 if (Ty->isFunctionTy() || Ty->isLabelTy()) 673 return Error(TyLoc, "invalid type for global variable"); 674 675 GlobalVariable *GV = 0; 676 677 // See if the global was forward referenced, if so, use the global. 678 if (!Name.empty()) { 679 if (GlobalValue *GVal = M->getNamedValue(Name)) { 680 if (!ForwardRefVals.erase(Name) || !isa<GlobalValue>(GVal)) 681 return Error(NameLoc, "redefinition of global '@" + Name + "'"); 682 GV = cast<GlobalVariable>(GVal); 683 } 684 } else { 685 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 686 I = ForwardRefValIDs.find(NumberedVals.size()); 687 if (I != ForwardRefValIDs.end()) { 688 GV = cast<GlobalVariable>(I->second.first); 689 ForwardRefValIDs.erase(I); 690 } 691 } 692 693 if (GV == 0) { 694 GV = new GlobalVariable(*M, Ty, false, GlobalValue::ExternalLinkage, 0, 695 Name, 0, GlobalVariable::NotThreadLocal, 696 AddrSpace); 697 } else { 698 if (GV->getType()->getElementType() != Ty) 699 return Error(TyLoc, 700 "forward reference and definition of global have different types"); 701 702 // Move the forward-reference to the correct spot in the module. 703 M->getGlobalList().splice(M->global_end(), M->getGlobalList(), GV); 704 } 705 706 if (Name.empty()) 707 NumberedVals.push_back(GV); 708 709 // Set the parsed properties on the global. 710 if (Init) 711 GV->setInitializer(Init); 712 GV->setConstant(IsConstant); 713 GV->setLinkage((GlobalValue::LinkageTypes)Linkage); 714 GV->setVisibility((GlobalValue::VisibilityTypes)Visibility); 715 GV->setThreadLocalMode(TLM); 716 GV->setUnnamedAddr(UnnamedAddr); 717 718 // Parse attributes on the global. 719 while (Lex.getKind() == lltok::comma) { 720 Lex.Lex(); 721 722 if (Lex.getKind() == lltok::kw_section) { 723 Lex.Lex(); 724 GV->setSection(Lex.getStrVal()); 725 if (ParseToken(lltok::StringConstant, "expected global section string")) 726 return true; 727 } else if (Lex.getKind() == lltok::kw_align) { 728 unsigned Alignment; 729 if (ParseOptionalAlignment(Alignment)) return true; 730 GV->setAlignment(Alignment); 731 } else { 732 TokError("unknown global variable property!"); 733 } 734 } 735 736 return false; 737} 738 739 740//===----------------------------------------------------------------------===// 741// GlobalValue Reference/Resolution Routines. 742//===----------------------------------------------------------------------===// 743 744/// GetGlobalVal - Get a value with the specified name or ID, creating a 745/// forward reference record if needed. This can return null if the value 746/// exists but does not have the right type. 747GlobalValue *LLParser::GetGlobalVal(const std::string &Name, Type *Ty, 748 LocTy Loc) { 749 PointerType *PTy = dyn_cast<PointerType>(Ty); 750 if (PTy == 0) { 751 Error(Loc, "global variable reference must have pointer type"); 752 return 0; 753 } 754 755 // Look this name up in the normal function symbol table. 756 GlobalValue *Val = 757 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name)); 758 759 // If this is a forward reference for the value, see if we already created a 760 // forward ref record. 761 if (Val == 0) { 762 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 763 I = ForwardRefVals.find(Name); 764 if (I != ForwardRefVals.end()) 765 Val = I->second.first; 766 } 767 768 // If we have the value in the symbol table or fwd-ref table, return it. 769 if (Val) { 770 if (Val->getType() == Ty) return Val; 771 Error(Loc, "'@" + Name + "' defined with type '" + 772 getTypeString(Val->getType()) + "'"); 773 return 0; 774 } 775 776 // Otherwise, create a new forward reference for this value and remember it. 777 GlobalValue *FwdVal; 778 if (FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) 779 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M); 780 else 781 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 782 GlobalValue::ExternalWeakLinkage, 0, Name); 783 784 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 785 return FwdVal; 786} 787 788GlobalValue *LLParser::GetGlobalVal(unsigned ID, Type *Ty, LocTy Loc) { 789 PointerType *PTy = dyn_cast<PointerType>(Ty); 790 if (PTy == 0) { 791 Error(Loc, "global variable reference must have pointer type"); 792 return 0; 793 } 794 795 GlobalValue *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 796 797 // If this is a forward reference for the value, see if we already created a 798 // forward ref record. 799 if (Val == 0) { 800 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 801 I = ForwardRefValIDs.find(ID); 802 if (I != ForwardRefValIDs.end()) 803 Val = I->second.first; 804 } 805 806 // If we have the value in the symbol table or fwd-ref table, return it. 807 if (Val) { 808 if (Val->getType() == Ty) return Val; 809 Error(Loc, "'@" + Twine(ID) + "' defined with type '" + 810 getTypeString(Val->getType()) + "'"); 811 return 0; 812 } 813 814 // Otherwise, create a new forward reference for this value and remember it. 815 GlobalValue *FwdVal; 816 if (FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) 817 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, "", M); 818 else 819 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 820 GlobalValue::ExternalWeakLinkage, 0, ""); 821 822 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 823 return FwdVal; 824} 825 826 827//===----------------------------------------------------------------------===// 828// Helper Routines. 829//===----------------------------------------------------------------------===// 830 831/// ParseToken - If the current token has the specified kind, eat it and return 832/// success. Otherwise, emit the specified error and return failure. 833bool LLParser::ParseToken(lltok::Kind T, const char *ErrMsg) { 834 if (Lex.getKind() != T) 835 return TokError(ErrMsg); 836 Lex.Lex(); 837 return false; 838} 839 840/// ParseStringConstant 841/// ::= StringConstant 842bool LLParser::ParseStringConstant(std::string &Result) { 843 if (Lex.getKind() != lltok::StringConstant) 844 return TokError("expected string constant"); 845 Result = Lex.getStrVal(); 846 Lex.Lex(); 847 return false; 848} 849 850/// ParseUInt32 851/// ::= uint32 852bool LLParser::ParseUInt32(unsigned &Val) { 853 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned()) 854 return TokError("expected integer"); 855 uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(0xFFFFFFFFULL+1); 856 if (Val64 != unsigned(Val64)) 857 return TokError("expected 32-bit integer (too large)"); 858 Val = Val64; 859 Lex.Lex(); 860 return false; 861} 862 863/// ParseTLSModel 864/// := 'localdynamic' 865/// := 'initialexec' 866/// := 'localexec' 867bool LLParser::ParseTLSModel(GlobalVariable::ThreadLocalMode &TLM) { 868 switch (Lex.getKind()) { 869 default: 870 return TokError("expected localdynamic, initialexec or localexec"); 871 case lltok::kw_localdynamic: 872 TLM = GlobalVariable::LocalDynamicTLSModel; 873 break; 874 case lltok::kw_initialexec: 875 TLM = GlobalVariable::InitialExecTLSModel; 876 break; 877 case lltok::kw_localexec: 878 TLM = GlobalVariable::LocalExecTLSModel; 879 break; 880 } 881 882 Lex.Lex(); 883 return false; 884} 885 886/// ParseOptionalThreadLocal 887/// := /*empty*/ 888/// := 'thread_local' 889/// := 'thread_local' '(' tlsmodel ')' 890bool LLParser::ParseOptionalThreadLocal(GlobalVariable::ThreadLocalMode &TLM) { 891 TLM = GlobalVariable::NotThreadLocal; 892 if (!EatIfPresent(lltok::kw_thread_local)) 893 return false; 894 895 TLM = GlobalVariable::GeneralDynamicTLSModel; 896 if (Lex.getKind() == lltok::lparen) { 897 Lex.Lex(); 898 return ParseTLSModel(TLM) || 899 ParseToken(lltok::rparen, "expected ')' after thread local model"); 900 } 901 return false; 902} 903 904/// ParseOptionalAddrSpace 905/// := /*empty*/ 906/// := 'addrspace' '(' uint32 ')' 907bool LLParser::ParseOptionalAddrSpace(unsigned &AddrSpace) { 908 AddrSpace = 0; 909 if (!EatIfPresent(lltok::kw_addrspace)) 910 return false; 911 return ParseToken(lltok::lparen, "expected '(' in address space") || 912 ParseUInt32(AddrSpace) || 913 ParseToken(lltok::rparen, "expected ')' in address space"); 914} 915 916/// ParseOptionalAttrs - Parse a potentially empty attribute list. AttrKind 917/// indicates what kind of attribute list this is: 0: function arg, 1: result, 918/// 2: function attr. 919bool LLParser::ParseOptionalAttrs(Attributes &Attrs, unsigned AttrKind) { 920 Attrs = Attribute::None; 921 LocTy AttrLoc = Lex.getLoc(); 922 923 while (1) { 924 switch (Lex.getKind()) { 925 default: // End of attributes. 926 if (AttrKind != 2 && (Attrs & Attribute::FunctionOnly)) 927 return Error(AttrLoc, "invalid use of function-only attribute"); 928 929 // As a hack, we allow "align 2" on functions as a synonym for 930 // "alignstack 2". 931 if (AttrKind == 2 && 932 (Attrs & ~(Attribute::FunctionOnly | Attribute::Alignment))) 933 return Error(AttrLoc, "invalid use of attribute on a function"); 934 935 if (AttrKind != 0 && (Attrs & Attribute::ParameterOnly)) 936 return Error(AttrLoc, "invalid use of parameter-only attribute"); 937 938 return false; 939 case lltok::kw_zeroext: Attrs |= Attribute::ZExt; break; 940 case lltok::kw_signext: Attrs |= Attribute::SExt; break; 941 case lltok::kw_inreg: Attrs |= Attribute::InReg; break; 942 case lltok::kw_sret: Attrs |= Attribute::StructRet; break; 943 case lltok::kw_noalias: Attrs |= Attribute::NoAlias; break; 944 case lltok::kw_nocapture: Attrs |= Attribute::NoCapture; break; 945 case lltok::kw_byval: Attrs |= Attribute::ByVal; break; 946 case lltok::kw_nest: Attrs |= Attribute::Nest; break; 947 948 case lltok::kw_noreturn: Attrs |= Attribute::NoReturn; break; 949 case lltok::kw_nounwind: Attrs |= Attribute::NoUnwind; break; 950 case lltok::kw_uwtable: Attrs |= Attribute::UWTable; break; 951 case lltok::kw_returns_twice: Attrs |= Attribute::ReturnsTwice; break; 952 case lltok::kw_noinline: Attrs |= Attribute::NoInline; break; 953 case lltok::kw_readnone: Attrs |= Attribute::ReadNone; break; 954 case lltok::kw_readonly: Attrs |= Attribute::ReadOnly; break; 955 case lltok::kw_inlinehint: Attrs |= Attribute::InlineHint; break; 956 case lltok::kw_alwaysinline: Attrs |= Attribute::AlwaysInline; break; 957 case lltok::kw_optsize: Attrs |= Attribute::OptimizeForSize; break; 958 case lltok::kw_ssp: Attrs |= Attribute::StackProtect; break; 959 case lltok::kw_sspreq: Attrs |= Attribute::StackProtectReq; break; 960 case lltok::kw_noredzone: Attrs |= Attribute::NoRedZone; break; 961 case lltok::kw_noimplicitfloat: Attrs |= Attribute::NoImplicitFloat; break; 962 case lltok::kw_naked: Attrs |= Attribute::Naked; break; 963 case lltok::kw_nonlazybind: Attrs |= Attribute::NonLazyBind; break; 964 case lltok::kw_address_safety: Attrs |= Attribute::AddressSafety; break; 965 966 case lltok::kw_alignstack: { 967 unsigned Alignment; 968 if (ParseOptionalStackAlignment(Alignment)) 969 return true; 970 Attrs |= Attribute::constructStackAlignmentFromInt(Alignment); 971 continue; 972 } 973 974 case lltok::kw_align: { 975 unsigned Alignment; 976 if (ParseOptionalAlignment(Alignment)) 977 return true; 978 Attrs |= Attribute::constructAlignmentFromInt(Alignment); 979 continue; 980 } 981 982 } 983 Lex.Lex(); 984 } 985} 986 987/// ParseOptionalLinkage 988/// ::= /*empty*/ 989/// ::= 'private' 990/// ::= 'linker_private' 991/// ::= 'linker_private_weak' 992/// ::= 'internal' 993/// ::= 'weak' 994/// ::= 'weak_odr' 995/// ::= 'linkonce' 996/// ::= 'linkonce_odr' 997/// ::= 'linkonce_odr_auto_hide' 998/// ::= 'available_externally' 999/// ::= 'appending' 1000/// ::= 'dllexport' 1001/// ::= 'common' 1002/// ::= 'dllimport' 1003/// ::= 'extern_weak' 1004/// ::= 'external' 1005bool LLParser::ParseOptionalLinkage(unsigned &Res, bool &HasLinkage) { 1006 HasLinkage = false; 1007 switch (Lex.getKind()) { 1008 default: Res=GlobalValue::ExternalLinkage; return false; 1009 case lltok::kw_private: Res = GlobalValue::PrivateLinkage; break; 1010 case lltok::kw_linker_private: Res = GlobalValue::LinkerPrivateLinkage; break; 1011 case lltok::kw_linker_private_weak: 1012 Res = GlobalValue::LinkerPrivateWeakLinkage; 1013 break; 1014 case lltok::kw_internal: Res = GlobalValue::InternalLinkage; break; 1015 case lltok::kw_weak: Res = GlobalValue::WeakAnyLinkage; break; 1016 case lltok::kw_weak_odr: Res = GlobalValue::WeakODRLinkage; break; 1017 case lltok::kw_linkonce: Res = GlobalValue::LinkOnceAnyLinkage; break; 1018 case lltok::kw_linkonce_odr: Res = GlobalValue::LinkOnceODRLinkage; break; 1019 case lltok::kw_linkonce_odr_auto_hide: 1020 case lltok::kw_linker_private_weak_def_auto: // FIXME: For backwards compat. 1021 Res = GlobalValue::LinkOnceODRAutoHideLinkage; 1022 break; 1023 case lltok::kw_available_externally: 1024 Res = GlobalValue::AvailableExternallyLinkage; 1025 break; 1026 case lltok::kw_appending: Res = GlobalValue::AppendingLinkage; break; 1027 case lltok::kw_dllexport: Res = GlobalValue::DLLExportLinkage; break; 1028 case lltok::kw_common: Res = GlobalValue::CommonLinkage; break; 1029 case lltok::kw_dllimport: Res = GlobalValue::DLLImportLinkage; break; 1030 case lltok::kw_extern_weak: Res = GlobalValue::ExternalWeakLinkage; break; 1031 case lltok::kw_external: Res = GlobalValue::ExternalLinkage; break; 1032 } 1033 Lex.Lex(); 1034 HasLinkage = true; 1035 return false; 1036} 1037 1038/// ParseOptionalVisibility 1039/// ::= /*empty*/ 1040/// ::= 'default' 1041/// ::= 'hidden' 1042/// ::= 'protected' 1043/// 1044bool LLParser::ParseOptionalVisibility(unsigned &Res) { 1045 switch (Lex.getKind()) { 1046 default: Res = GlobalValue::DefaultVisibility; return false; 1047 case lltok::kw_default: Res = GlobalValue::DefaultVisibility; break; 1048 case lltok::kw_hidden: Res = GlobalValue::HiddenVisibility; break; 1049 case lltok::kw_protected: Res = GlobalValue::ProtectedVisibility; break; 1050 } 1051 Lex.Lex(); 1052 return false; 1053} 1054 1055/// ParseOptionalCallingConv 1056/// ::= /*empty*/ 1057/// ::= 'ccc' 1058/// ::= 'fastcc' 1059/// ::= 'coldcc' 1060/// ::= 'x86_stdcallcc' 1061/// ::= 'x86_fastcallcc' 1062/// ::= 'x86_thiscallcc' 1063/// ::= 'arm_apcscc' 1064/// ::= 'arm_aapcscc' 1065/// ::= 'arm_aapcs_vfpcc' 1066/// ::= 'msp430_intrcc' 1067/// ::= 'ptx_kernel' 1068/// ::= 'ptx_device' 1069/// ::= 'cc' UINT 1070/// 1071bool LLParser::ParseOptionalCallingConv(CallingConv::ID &CC) { 1072 switch (Lex.getKind()) { 1073 default: CC = CallingConv::C; return false; 1074 case lltok::kw_ccc: CC = CallingConv::C; break; 1075 case lltok::kw_fastcc: CC = CallingConv::Fast; break; 1076 case lltok::kw_coldcc: CC = CallingConv::Cold; break; 1077 case lltok::kw_x86_stdcallcc: CC = CallingConv::X86_StdCall; break; 1078 case lltok::kw_x86_fastcallcc: CC = CallingConv::X86_FastCall; break; 1079 case lltok::kw_x86_thiscallcc: CC = CallingConv::X86_ThisCall; break; 1080 case lltok::kw_arm_apcscc: CC = CallingConv::ARM_APCS; break; 1081 case lltok::kw_arm_aapcscc: CC = CallingConv::ARM_AAPCS; break; 1082 case lltok::kw_arm_aapcs_vfpcc:CC = CallingConv::ARM_AAPCS_VFP; break; 1083 case lltok::kw_msp430_intrcc: CC = CallingConv::MSP430_INTR; break; 1084 case lltok::kw_ptx_kernel: CC = CallingConv::PTX_Kernel; break; 1085 case lltok::kw_ptx_device: CC = CallingConv::PTX_Device; break; 1086 case lltok::kw_cc: { 1087 unsigned ArbitraryCC; 1088 Lex.Lex(); 1089 if (ParseUInt32(ArbitraryCC)) 1090 return true; 1091 CC = static_cast<CallingConv::ID>(ArbitraryCC); 1092 return false; 1093 } 1094 } 1095 1096 Lex.Lex(); 1097 return false; 1098} 1099 1100/// ParseInstructionMetadata 1101/// ::= !dbg !42 (',' !dbg !57)* 1102bool LLParser::ParseInstructionMetadata(Instruction *Inst, 1103 PerFunctionState *PFS) { 1104 do { 1105 if (Lex.getKind() != lltok::MetadataVar) 1106 return TokError("expected metadata after comma"); 1107 1108 std::string Name = Lex.getStrVal(); 1109 unsigned MDK = M->getMDKindID(Name); 1110 Lex.Lex(); 1111 1112 MDNode *Node; 1113 SMLoc Loc = Lex.getLoc(); 1114 1115 if (ParseToken(lltok::exclaim, "expected '!' here")) 1116 return true; 1117 1118 // This code is similar to that of ParseMetadataValue, however it needs to 1119 // have special-case code for a forward reference; see the comments on 1120 // ForwardRefInstMetadata for details. Also, MDStrings are not supported 1121 // at the top level here. 1122 if (Lex.getKind() == lltok::lbrace) { 1123 ValID ID; 1124 if (ParseMetadataListValue(ID, PFS)) 1125 return true; 1126 assert(ID.Kind == ValID::t_MDNode); 1127 Inst->setMetadata(MDK, ID.MDNodeVal); 1128 } else { 1129 unsigned NodeID = 0; 1130 if (ParseMDNodeID(Node, NodeID)) 1131 return true; 1132 if (Node) { 1133 // If we got the node, add it to the instruction. 1134 Inst->setMetadata(MDK, Node); 1135 } else { 1136 MDRef R = { Loc, MDK, NodeID }; 1137 // Otherwise, remember that this should be resolved later. 1138 ForwardRefInstMetadata[Inst].push_back(R); 1139 } 1140 } 1141 1142 // If this is the end of the list, we're done. 1143 } while (EatIfPresent(lltok::comma)); 1144 return false; 1145} 1146 1147/// ParseOptionalAlignment 1148/// ::= /* empty */ 1149/// ::= 'align' 4 1150bool LLParser::ParseOptionalAlignment(unsigned &Alignment) { 1151 Alignment = 0; 1152 if (!EatIfPresent(lltok::kw_align)) 1153 return false; 1154 LocTy AlignLoc = Lex.getLoc(); 1155 if (ParseUInt32(Alignment)) return true; 1156 if (!isPowerOf2_32(Alignment)) 1157 return Error(AlignLoc, "alignment is not a power of two"); 1158 if (Alignment > Value::MaximumAlignment) 1159 return Error(AlignLoc, "huge alignments are not supported yet"); 1160 return false; 1161} 1162 1163/// ParseOptionalCommaAlign 1164/// ::= 1165/// ::= ',' align 4 1166/// 1167/// This returns with AteExtraComma set to true if it ate an excess comma at the 1168/// end. 1169bool LLParser::ParseOptionalCommaAlign(unsigned &Alignment, 1170 bool &AteExtraComma) { 1171 AteExtraComma = false; 1172 while (EatIfPresent(lltok::comma)) { 1173 // Metadata at the end is an early exit. 1174 if (Lex.getKind() == lltok::MetadataVar) { 1175 AteExtraComma = true; 1176 return false; 1177 } 1178 1179 if (Lex.getKind() != lltok::kw_align) 1180 return Error(Lex.getLoc(), "expected metadata or 'align'"); 1181 1182 if (ParseOptionalAlignment(Alignment)) return true; 1183 } 1184 1185 return false; 1186} 1187 1188/// ParseScopeAndOrdering 1189/// if isAtomic: ::= 'singlethread'? AtomicOrdering 1190/// else: ::= 1191/// 1192/// This sets Scope and Ordering to the parsed values. 1193bool LLParser::ParseScopeAndOrdering(bool isAtomic, SynchronizationScope &Scope, 1194 AtomicOrdering &Ordering) { 1195 if (!isAtomic) 1196 return false; 1197 1198 Scope = CrossThread; 1199 if (EatIfPresent(lltok::kw_singlethread)) 1200 Scope = SingleThread; 1201 switch (Lex.getKind()) { 1202 default: return TokError("Expected ordering on atomic instruction"); 1203 case lltok::kw_unordered: Ordering = Unordered; break; 1204 case lltok::kw_monotonic: Ordering = Monotonic; break; 1205 case lltok::kw_acquire: Ordering = Acquire; break; 1206 case lltok::kw_release: Ordering = Release; break; 1207 case lltok::kw_acq_rel: Ordering = AcquireRelease; break; 1208 case lltok::kw_seq_cst: Ordering = SequentiallyConsistent; break; 1209 } 1210 Lex.Lex(); 1211 return false; 1212} 1213 1214/// ParseOptionalStackAlignment 1215/// ::= /* empty */ 1216/// ::= 'alignstack' '(' 4 ')' 1217bool LLParser::ParseOptionalStackAlignment(unsigned &Alignment) { 1218 Alignment = 0; 1219 if (!EatIfPresent(lltok::kw_alignstack)) 1220 return false; 1221 LocTy ParenLoc = Lex.getLoc(); 1222 if (!EatIfPresent(lltok::lparen)) 1223 return Error(ParenLoc, "expected '('"); 1224 LocTy AlignLoc = Lex.getLoc(); 1225 if (ParseUInt32(Alignment)) return true; 1226 ParenLoc = Lex.getLoc(); 1227 if (!EatIfPresent(lltok::rparen)) 1228 return Error(ParenLoc, "expected ')'"); 1229 if (!isPowerOf2_32(Alignment)) 1230 return Error(AlignLoc, "stack alignment is not a power of two"); 1231 return false; 1232} 1233 1234/// ParseIndexList - This parses the index list for an insert/extractvalue 1235/// instruction. This sets AteExtraComma in the case where we eat an extra 1236/// comma at the end of the line and find that it is followed by metadata. 1237/// Clients that don't allow metadata can call the version of this function that 1238/// only takes one argument. 1239/// 1240/// ParseIndexList 1241/// ::= (',' uint32)+ 1242/// 1243bool LLParser::ParseIndexList(SmallVectorImpl<unsigned> &Indices, 1244 bool &AteExtraComma) { 1245 AteExtraComma = false; 1246 1247 if (Lex.getKind() != lltok::comma) 1248 return TokError("expected ',' as start of index list"); 1249 1250 while (EatIfPresent(lltok::comma)) { 1251 if (Lex.getKind() == lltok::MetadataVar) { 1252 AteExtraComma = true; 1253 return false; 1254 } 1255 unsigned Idx = 0; 1256 if (ParseUInt32(Idx)) return true; 1257 Indices.push_back(Idx); 1258 } 1259 1260 return false; 1261} 1262 1263//===----------------------------------------------------------------------===// 1264// Type Parsing. 1265//===----------------------------------------------------------------------===// 1266 1267/// ParseType - Parse a type. 1268bool LLParser::ParseType(Type *&Result, bool AllowVoid) { 1269 SMLoc TypeLoc = Lex.getLoc(); 1270 switch (Lex.getKind()) { 1271 default: 1272 return TokError("expected type"); 1273 case lltok::Type: 1274 // Type ::= 'float' | 'void' (etc) 1275 Result = Lex.getTyVal(); 1276 Lex.Lex(); 1277 break; 1278 case lltok::lbrace: 1279 // Type ::= StructType 1280 if (ParseAnonStructType(Result, false)) 1281 return true; 1282 break; 1283 case lltok::lsquare: 1284 // Type ::= '[' ... ']' 1285 Lex.Lex(); // eat the lsquare. 1286 if (ParseArrayVectorType(Result, false)) 1287 return true; 1288 break; 1289 case lltok::less: // Either vector or packed struct. 1290 // Type ::= '<' ... '>' 1291 Lex.Lex(); 1292 if (Lex.getKind() == lltok::lbrace) { 1293 if (ParseAnonStructType(Result, true) || 1294 ParseToken(lltok::greater, "expected '>' at end of packed struct")) 1295 return true; 1296 } else if (ParseArrayVectorType(Result, true)) 1297 return true; 1298 break; 1299 case lltok::LocalVar: { 1300 // Type ::= %foo 1301 std::pair<Type*, LocTy> &Entry = NamedTypes[Lex.getStrVal()]; 1302 1303 // If the type hasn't been defined yet, create a forward definition and 1304 // remember where that forward def'n was seen (in case it never is defined). 1305 if (Entry.first == 0) { 1306 Entry.first = StructType::create(Context, Lex.getStrVal()); 1307 Entry.second = Lex.getLoc(); 1308 } 1309 Result = Entry.first; 1310 Lex.Lex(); 1311 break; 1312 } 1313 1314 case lltok::LocalVarID: { 1315 // Type ::= %4 1316 if (Lex.getUIntVal() >= NumberedTypes.size()) 1317 NumberedTypes.resize(Lex.getUIntVal()+1); 1318 std::pair<Type*, LocTy> &Entry = NumberedTypes[Lex.getUIntVal()]; 1319 1320 // If the type hasn't been defined yet, create a forward definition and 1321 // remember where that forward def'n was seen (in case it never is defined). 1322 if (Entry.first == 0) { 1323 Entry.first = StructType::create(Context); 1324 Entry.second = Lex.getLoc(); 1325 } 1326 Result = Entry.first; 1327 Lex.Lex(); 1328 break; 1329 } 1330 } 1331 1332 // Parse the type suffixes. 1333 while (1) { 1334 switch (Lex.getKind()) { 1335 // End of type. 1336 default: 1337 if (!AllowVoid && Result->isVoidTy()) 1338 return Error(TypeLoc, "void type only allowed for function results"); 1339 return false; 1340 1341 // Type ::= Type '*' 1342 case lltok::star: 1343 if (Result->isLabelTy()) 1344 return TokError("basic block pointers are invalid"); 1345 if (Result->isVoidTy()) 1346 return TokError("pointers to void are invalid - use i8* instead"); 1347 if (!PointerType::isValidElementType(Result)) 1348 return TokError("pointer to this type is invalid"); 1349 Result = PointerType::getUnqual(Result); 1350 Lex.Lex(); 1351 break; 1352 1353 // Type ::= Type 'addrspace' '(' uint32 ')' '*' 1354 case lltok::kw_addrspace: { 1355 if (Result->isLabelTy()) 1356 return TokError("basic block pointers are invalid"); 1357 if (Result->isVoidTy()) 1358 return TokError("pointers to void are invalid; use i8* instead"); 1359 if (!PointerType::isValidElementType(Result)) 1360 return TokError("pointer to this type is invalid"); 1361 unsigned AddrSpace; 1362 if (ParseOptionalAddrSpace(AddrSpace) || 1363 ParseToken(lltok::star, "expected '*' in address space")) 1364 return true; 1365 1366 Result = PointerType::get(Result, AddrSpace); 1367 break; 1368 } 1369 1370 /// Types '(' ArgTypeListI ')' OptFuncAttrs 1371 case lltok::lparen: 1372 if (ParseFunctionType(Result)) 1373 return true; 1374 break; 1375 } 1376 } 1377} 1378 1379/// ParseParameterList 1380/// ::= '(' ')' 1381/// ::= '(' Arg (',' Arg)* ')' 1382/// Arg 1383/// ::= Type OptionalAttributes Value OptionalAttributes 1384bool LLParser::ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList, 1385 PerFunctionState &PFS) { 1386 if (ParseToken(lltok::lparen, "expected '(' in call")) 1387 return true; 1388 1389 while (Lex.getKind() != lltok::rparen) { 1390 // If this isn't the first argument, we need a comma. 1391 if (!ArgList.empty() && 1392 ParseToken(lltok::comma, "expected ',' in argument list")) 1393 return true; 1394 1395 // Parse the argument. 1396 LocTy ArgLoc; 1397 Type *ArgTy = 0; 1398 Attributes ArgAttrs1; 1399 Attributes ArgAttrs2; 1400 Value *V; 1401 if (ParseType(ArgTy, ArgLoc)) 1402 return true; 1403 1404 // Otherwise, handle normal operands. 1405 if (ParseOptionalAttrs(ArgAttrs1, 0) || ParseValue(ArgTy, V, PFS)) 1406 return true; 1407 ArgList.push_back(ParamInfo(ArgLoc, V, ArgAttrs1|ArgAttrs2)); 1408 } 1409 1410 Lex.Lex(); // Lex the ')'. 1411 return false; 1412} 1413 1414 1415 1416/// ParseArgumentList - Parse the argument list for a function type or function 1417/// prototype. 1418/// ::= '(' ArgTypeListI ')' 1419/// ArgTypeListI 1420/// ::= /*empty*/ 1421/// ::= '...' 1422/// ::= ArgTypeList ',' '...' 1423/// ::= ArgType (',' ArgType)* 1424/// 1425bool LLParser::ParseArgumentList(SmallVectorImpl<ArgInfo> &ArgList, 1426 bool &isVarArg){ 1427 isVarArg = false; 1428 assert(Lex.getKind() == lltok::lparen); 1429 Lex.Lex(); // eat the (. 1430 1431 if (Lex.getKind() == lltok::rparen) { 1432 // empty 1433 } else if (Lex.getKind() == lltok::dotdotdot) { 1434 isVarArg = true; 1435 Lex.Lex(); 1436 } else { 1437 LocTy TypeLoc = Lex.getLoc(); 1438 Type *ArgTy = 0; 1439 Attributes Attrs; 1440 std::string Name; 1441 1442 if (ParseType(ArgTy) || 1443 ParseOptionalAttrs(Attrs, 0)) return true; 1444 1445 if (ArgTy->isVoidTy()) 1446 return Error(TypeLoc, "argument can not have void type"); 1447 1448 if (Lex.getKind() == lltok::LocalVar) { 1449 Name = Lex.getStrVal(); 1450 Lex.Lex(); 1451 } 1452 1453 if (!FunctionType::isValidArgumentType(ArgTy)) 1454 return Error(TypeLoc, "invalid type for function argument"); 1455 1456 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1457 1458 while (EatIfPresent(lltok::comma)) { 1459 // Handle ... at end of arg list. 1460 if (EatIfPresent(lltok::dotdotdot)) { 1461 isVarArg = true; 1462 break; 1463 } 1464 1465 // Otherwise must be an argument type. 1466 TypeLoc = Lex.getLoc(); 1467 if (ParseType(ArgTy) || ParseOptionalAttrs(Attrs, 0)) return true; 1468 1469 if (ArgTy->isVoidTy()) 1470 return Error(TypeLoc, "argument can not have void type"); 1471 1472 if (Lex.getKind() == lltok::LocalVar) { 1473 Name = Lex.getStrVal(); 1474 Lex.Lex(); 1475 } else { 1476 Name = ""; 1477 } 1478 1479 if (!ArgTy->isFirstClassType()) 1480 return Error(TypeLoc, "invalid type for function argument"); 1481 1482 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1483 } 1484 } 1485 1486 return ParseToken(lltok::rparen, "expected ')' at end of argument list"); 1487} 1488 1489/// ParseFunctionType 1490/// ::= Type ArgumentList OptionalAttrs 1491bool LLParser::ParseFunctionType(Type *&Result) { 1492 assert(Lex.getKind() == lltok::lparen); 1493 1494 if (!FunctionType::isValidReturnType(Result)) 1495 return TokError("invalid function return type"); 1496 1497 SmallVector<ArgInfo, 8> ArgList; 1498 bool isVarArg; 1499 if (ParseArgumentList(ArgList, isVarArg)) 1500 return true; 1501 1502 // Reject names on the arguments lists. 1503 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 1504 if (!ArgList[i].Name.empty()) 1505 return Error(ArgList[i].Loc, "argument name invalid in function type"); 1506 if (ArgList[i].Attrs) 1507 return Error(ArgList[i].Loc, 1508 "argument attributes invalid in function type"); 1509 } 1510 1511 SmallVector<Type*, 16> ArgListTy; 1512 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 1513 ArgListTy.push_back(ArgList[i].Ty); 1514 1515 Result = FunctionType::get(Result, ArgListTy, isVarArg); 1516 return false; 1517} 1518 1519/// ParseAnonStructType - Parse an anonymous struct type, which is inlined into 1520/// other structs. 1521bool LLParser::ParseAnonStructType(Type *&Result, bool Packed) { 1522 SmallVector<Type*, 8> Elts; 1523 if (ParseStructBody(Elts)) return true; 1524 1525 Result = StructType::get(Context, Elts, Packed); 1526 return false; 1527} 1528 1529/// ParseStructDefinition - Parse a struct in a 'type' definition. 1530bool LLParser::ParseStructDefinition(SMLoc TypeLoc, StringRef Name, 1531 std::pair<Type*, LocTy> &Entry, 1532 Type *&ResultTy) { 1533 // If the type was already defined, diagnose the redefinition. 1534 if (Entry.first && !Entry.second.isValid()) 1535 return Error(TypeLoc, "redefinition of type"); 1536 1537 // If we have opaque, just return without filling in the definition for the 1538 // struct. This counts as a definition as far as the .ll file goes. 1539 if (EatIfPresent(lltok::kw_opaque)) { 1540 // This type is being defined, so clear the location to indicate this. 1541 Entry.second = SMLoc(); 1542 1543 // If this type number has never been uttered, create it. 1544 if (Entry.first == 0) 1545 Entry.first = StructType::create(Context, Name); 1546 ResultTy = Entry.first; 1547 return false; 1548 } 1549 1550 // If the type starts with '<', then it is either a packed struct or a vector. 1551 bool isPacked = EatIfPresent(lltok::less); 1552 1553 // If we don't have a struct, then we have a random type alias, which we 1554 // accept for compatibility with old files. These types are not allowed to be 1555 // forward referenced and not allowed to be recursive. 1556 if (Lex.getKind() != lltok::lbrace) { 1557 if (Entry.first) 1558 return Error(TypeLoc, "forward references to non-struct type"); 1559 1560 ResultTy = 0; 1561 if (isPacked) 1562 return ParseArrayVectorType(ResultTy, true); 1563 return ParseType(ResultTy); 1564 } 1565 1566 // This type is being defined, so clear the location to indicate this. 1567 Entry.second = SMLoc(); 1568 1569 // If this type number has never been uttered, create it. 1570 if (Entry.first == 0) 1571 Entry.first = StructType::create(Context, Name); 1572 1573 StructType *STy = cast<StructType>(Entry.first); 1574 1575 SmallVector<Type*, 8> Body; 1576 if (ParseStructBody(Body) || 1577 (isPacked && ParseToken(lltok::greater, "expected '>' in packed struct"))) 1578 return true; 1579 1580 STy->setBody(Body, isPacked); 1581 ResultTy = STy; 1582 return false; 1583} 1584 1585 1586/// ParseStructType: Handles packed and unpacked types. </> parsed elsewhere. 1587/// StructType 1588/// ::= '{' '}' 1589/// ::= '{' Type (',' Type)* '}' 1590/// ::= '<' '{' '}' '>' 1591/// ::= '<' '{' Type (',' Type)* '}' '>' 1592bool LLParser::ParseStructBody(SmallVectorImpl<Type*> &Body) { 1593 assert(Lex.getKind() == lltok::lbrace); 1594 Lex.Lex(); // Consume the '{' 1595 1596 // Handle the empty struct. 1597 if (EatIfPresent(lltok::rbrace)) 1598 return false; 1599 1600 LocTy EltTyLoc = Lex.getLoc(); 1601 Type *Ty = 0; 1602 if (ParseType(Ty)) return true; 1603 Body.push_back(Ty); 1604 1605 if (!StructType::isValidElementType(Ty)) 1606 return Error(EltTyLoc, "invalid element type for struct"); 1607 1608 while (EatIfPresent(lltok::comma)) { 1609 EltTyLoc = Lex.getLoc(); 1610 if (ParseType(Ty)) return true; 1611 1612 if (!StructType::isValidElementType(Ty)) 1613 return Error(EltTyLoc, "invalid element type for struct"); 1614 1615 Body.push_back(Ty); 1616 } 1617 1618 return ParseToken(lltok::rbrace, "expected '}' at end of struct"); 1619} 1620 1621/// ParseArrayVectorType - Parse an array or vector type, assuming the first 1622/// token has already been consumed. 1623/// Type 1624/// ::= '[' APSINTVAL 'x' Types ']' 1625/// ::= '<' APSINTVAL 'x' Types '>' 1626bool LLParser::ParseArrayVectorType(Type *&Result, bool isVector) { 1627 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned() || 1628 Lex.getAPSIntVal().getBitWidth() > 64) 1629 return TokError("expected number in address space"); 1630 1631 LocTy SizeLoc = Lex.getLoc(); 1632 uint64_t Size = Lex.getAPSIntVal().getZExtValue(); 1633 Lex.Lex(); 1634 1635 if (ParseToken(lltok::kw_x, "expected 'x' after element count")) 1636 return true; 1637 1638 LocTy TypeLoc = Lex.getLoc(); 1639 Type *EltTy = 0; 1640 if (ParseType(EltTy)) return true; 1641 1642 if (ParseToken(isVector ? lltok::greater : lltok::rsquare, 1643 "expected end of sequential type")) 1644 return true; 1645 1646 if (isVector) { 1647 if (Size == 0) 1648 return Error(SizeLoc, "zero element vector is illegal"); 1649 if ((unsigned)Size != Size) 1650 return Error(SizeLoc, "size too large for vector"); 1651 if (!VectorType::isValidElementType(EltTy)) 1652 return Error(TypeLoc, 1653 "vector element type must be fp, integer or a pointer to these types"); 1654 Result = VectorType::get(EltTy, unsigned(Size)); 1655 } else { 1656 if (!ArrayType::isValidElementType(EltTy)) 1657 return Error(TypeLoc, "invalid array element type"); 1658 Result = ArrayType::get(EltTy, Size); 1659 } 1660 return false; 1661} 1662 1663//===----------------------------------------------------------------------===// 1664// Function Semantic Analysis. 1665//===----------------------------------------------------------------------===// 1666 1667LLParser::PerFunctionState::PerFunctionState(LLParser &p, Function &f, 1668 int functionNumber) 1669 : P(p), F(f), FunctionNumber(functionNumber) { 1670 1671 // Insert unnamed arguments into the NumberedVals list. 1672 for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 1673 AI != E; ++AI) 1674 if (!AI->hasName()) 1675 NumberedVals.push_back(AI); 1676} 1677 1678LLParser::PerFunctionState::~PerFunctionState() { 1679 // If there were any forward referenced non-basicblock values, delete them. 1680 for (std::map<std::string, std::pair<Value*, LocTy> >::iterator 1681 I = ForwardRefVals.begin(), E = ForwardRefVals.end(); I != E; ++I) 1682 if (!isa<BasicBlock>(I->second.first)) { 1683 I->second.first->replaceAllUsesWith( 1684 UndefValue::get(I->second.first->getType())); 1685 delete I->second.first; 1686 I->second.first = 0; 1687 } 1688 1689 for (std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1690 I = ForwardRefValIDs.begin(), E = ForwardRefValIDs.end(); I != E; ++I) 1691 if (!isa<BasicBlock>(I->second.first)) { 1692 I->second.first->replaceAllUsesWith( 1693 UndefValue::get(I->second.first->getType())); 1694 delete I->second.first; 1695 I->second.first = 0; 1696 } 1697} 1698 1699bool LLParser::PerFunctionState::FinishFunction() { 1700 // Check to see if someone took the address of labels in this block. 1701 if (!P.ForwardRefBlockAddresses.empty()) { 1702 ValID FunctionID; 1703 if (!F.getName().empty()) { 1704 FunctionID.Kind = ValID::t_GlobalName; 1705 FunctionID.StrVal = F.getName(); 1706 } else { 1707 FunctionID.Kind = ValID::t_GlobalID; 1708 FunctionID.UIntVal = FunctionNumber; 1709 } 1710 1711 std::map<ValID, std::vector<std::pair<ValID, GlobalValue*> > >::iterator 1712 FRBAI = P.ForwardRefBlockAddresses.find(FunctionID); 1713 if (FRBAI != P.ForwardRefBlockAddresses.end()) { 1714 // Resolve all these references. 1715 if (P.ResolveForwardRefBlockAddresses(&F, FRBAI->second, this)) 1716 return true; 1717 1718 P.ForwardRefBlockAddresses.erase(FRBAI); 1719 } 1720 } 1721 1722 if (!ForwardRefVals.empty()) 1723 return P.Error(ForwardRefVals.begin()->second.second, 1724 "use of undefined value '%" + ForwardRefVals.begin()->first + 1725 "'"); 1726 if (!ForwardRefValIDs.empty()) 1727 return P.Error(ForwardRefValIDs.begin()->second.second, 1728 "use of undefined value '%" + 1729 Twine(ForwardRefValIDs.begin()->first) + "'"); 1730 return false; 1731} 1732 1733 1734/// GetVal - Get a value with the specified name or ID, creating a 1735/// forward reference record if needed. This can return null if the value 1736/// exists but does not have the right type. 1737Value *LLParser::PerFunctionState::GetVal(const std::string &Name, 1738 Type *Ty, LocTy Loc) { 1739 // Look this name up in the normal function symbol table. 1740 Value *Val = F.getValueSymbolTable().lookup(Name); 1741 1742 // If this is a forward reference for the value, see if we already created a 1743 // forward ref record. 1744 if (Val == 0) { 1745 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1746 I = ForwardRefVals.find(Name); 1747 if (I != ForwardRefVals.end()) 1748 Val = I->second.first; 1749 } 1750 1751 // If we have the value in the symbol table or fwd-ref table, return it. 1752 if (Val) { 1753 if (Val->getType() == Ty) return Val; 1754 if (Ty->isLabelTy()) 1755 P.Error(Loc, "'%" + Name + "' is not a basic block"); 1756 else 1757 P.Error(Loc, "'%" + Name + "' defined with type '" + 1758 getTypeString(Val->getType()) + "'"); 1759 return 0; 1760 } 1761 1762 // Don't make placeholders with invalid type. 1763 if (!Ty->isFirstClassType() && !Ty->isLabelTy()) { 1764 P.Error(Loc, "invalid use of a non-first-class type"); 1765 return 0; 1766 } 1767 1768 // Otherwise, create a new forward reference for this value and remember it. 1769 Value *FwdVal; 1770 if (Ty->isLabelTy()) 1771 FwdVal = BasicBlock::Create(F.getContext(), Name, &F); 1772 else 1773 FwdVal = new Argument(Ty, Name); 1774 1775 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 1776 return FwdVal; 1777} 1778 1779Value *LLParser::PerFunctionState::GetVal(unsigned ID, Type *Ty, 1780 LocTy Loc) { 1781 // Look this name up in the normal function symbol table. 1782 Value *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 1783 1784 // If this is a forward reference for the value, see if we already created a 1785 // forward ref record. 1786 if (Val == 0) { 1787 std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1788 I = ForwardRefValIDs.find(ID); 1789 if (I != ForwardRefValIDs.end()) 1790 Val = I->second.first; 1791 } 1792 1793 // If we have the value in the symbol table or fwd-ref table, return it. 1794 if (Val) { 1795 if (Val->getType() == Ty) return Val; 1796 if (Ty->isLabelTy()) 1797 P.Error(Loc, "'%" + Twine(ID) + "' is not a basic block"); 1798 else 1799 P.Error(Loc, "'%" + Twine(ID) + "' defined with type '" + 1800 getTypeString(Val->getType()) + "'"); 1801 return 0; 1802 } 1803 1804 if (!Ty->isFirstClassType() && !Ty->isLabelTy()) { 1805 P.Error(Loc, "invalid use of a non-first-class type"); 1806 return 0; 1807 } 1808 1809 // Otherwise, create a new forward reference for this value and remember it. 1810 Value *FwdVal; 1811 if (Ty->isLabelTy()) 1812 FwdVal = BasicBlock::Create(F.getContext(), "", &F); 1813 else 1814 FwdVal = new Argument(Ty); 1815 1816 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 1817 return FwdVal; 1818} 1819 1820/// SetInstName - After an instruction is parsed and inserted into its 1821/// basic block, this installs its name. 1822bool LLParser::PerFunctionState::SetInstName(int NameID, 1823 const std::string &NameStr, 1824 LocTy NameLoc, Instruction *Inst) { 1825 // If this instruction has void type, it cannot have a name or ID specified. 1826 if (Inst->getType()->isVoidTy()) { 1827 if (NameID != -1 || !NameStr.empty()) 1828 return P.Error(NameLoc, "instructions returning void cannot have a name"); 1829 return false; 1830 } 1831 1832 // If this was a numbered instruction, verify that the instruction is the 1833 // expected value and resolve any forward references. 1834 if (NameStr.empty()) { 1835 // If neither a name nor an ID was specified, just use the next ID. 1836 if (NameID == -1) 1837 NameID = NumberedVals.size(); 1838 1839 if (unsigned(NameID) != NumberedVals.size()) 1840 return P.Error(NameLoc, "instruction expected to be numbered '%" + 1841 Twine(NumberedVals.size()) + "'"); 1842 1843 std::map<unsigned, std::pair<Value*, LocTy> >::iterator FI = 1844 ForwardRefValIDs.find(NameID); 1845 if (FI != ForwardRefValIDs.end()) { 1846 if (FI->second.first->getType() != Inst->getType()) 1847 return P.Error(NameLoc, "instruction forward referenced with type '" + 1848 getTypeString(FI->second.first->getType()) + "'"); 1849 FI->second.first->replaceAllUsesWith(Inst); 1850 delete FI->second.first; 1851 ForwardRefValIDs.erase(FI); 1852 } 1853 1854 NumberedVals.push_back(Inst); 1855 return false; 1856 } 1857 1858 // Otherwise, the instruction had a name. Resolve forward refs and set it. 1859 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1860 FI = ForwardRefVals.find(NameStr); 1861 if (FI != ForwardRefVals.end()) { 1862 if (FI->second.first->getType() != Inst->getType()) 1863 return P.Error(NameLoc, "instruction forward referenced with type '" + 1864 getTypeString(FI->second.first->getType()) + "'"); 1865 FI->second.first->replaceAllUsesWith(Inst); 1866 delete FI->second.first; 1867 ForwardRefVals.erase(FI); 1868 } 1869 1870 // Set the name on the instruction. 1871 Inst->setName(NameStr); 1872 1873 if (Inst->getName() != NameStr) 1874 return P.Error(NameLoc, "multiple definition of local value named '" + 1875 NameStr + "'"); 1876 return false; 1877} 1878 1879/// GetBB - Get a basic block with the specified name or ID, creating a 1880/// forward reference record if needed. 1881BasicBlock *LLParser::PerFunctionState::GetBB(const std::string &Name, 1882 LocTy Loc) { 1883 return cast_or_null<BasicBlock>(GetVal(Name, 1884 Type::getLabelTy(F.getContext()), Loc)); 1885} 1886 1887BasicBlock *LLParser::PerFunctionState::GetBB(unsigned ID, LocTy Loc) { 1888 return cast_or_null<BasicBlock>(GetVal(ID, 1889 Type::getLabelTy(F.getContext()), Loc)); 1890} 1891 1892/// DefineBB - Define the specified basic block, which is either named or 1893/// unnamed. If there is an error, this returns null otherwise it returns 1894/// the block being defined. 1895BasicBlock *LLParser::PerFunctionState::DefineBB(const std::string &Name, 1896 LocTy Loc) { 1897 BasicBlock *BB; 1898 if (Name.empty()) 1899 BB = GetBB(NumberedVals.size(), Loc); 1900 else 1901 BB = GetBB(Name, Loc); 1902 if (BB == 0) return 0; // Already diagnosed error. 1903 1904 // Move the block to the end of the function. Forward ref'd blocks are 1905 // inserted wherever they happen to be referenced. 1906 F.getBasicBlockList().splice(F.end(), F.getBasicBlockList(), BB); 1907 1908 // Remove the block from forward ref sets. 1909 if (Name.empty()) { 1910 ForwardRefValIDs.erase(NumberedVals.size()); 1911 NumberedVals.push_back(BB); 1912 } else { 1913 // BB forward references are already in the function symbol table. 1914 ForwardRefVals.erase(Name); 1915 } 1916 1917 return BB; 1918} 1919 1920//===----------------------------------------------------------------------===// 1921// Constants. 1922//===----------------------------------------------------------------------===// 1923 1924/// ParseValID - Parse an abstract value that doesn't necessarily have a 1925/// type implied. For example, if we parse "4" we don't know what integer type 1926/// it has. The value will later be combined with its type and checked for 1927/// sanity. PFS is used to convert function-local operands of metadata (since 1928/// metadata operands are not just parsed here but also converted to values). 1929/// PFS can be null when we are not parsing metadata values inside a function. 1930bool LLParser::ParseValID(ValID &ID, PerFunctionState *PFS) { 1931 ID.Loc = Lex.getLoc(); 1932 switch (Lex.getKind()) { 1933 default: return TokError("expected value token"); 1934 case lltok::GlobalID: // @42 1935 ID.UIntVal = Lex.getUIntVal(); 1936 ID.Kind = ValID::t_GlobalID; 1937 break; 1938 case lltok::GlobalVar: // @foo 1939 ID.StrVal = Lex.getStrVal(); 1940 ID.Kind = ValID::t_GlobalName; 1941 break; 1942 case lltok::LocalVarID: // %42 1943 ID.UIntVal = Lex.getUIntVal(); 1944 ID.Kind = ValID::t_LocalID; 1945 break; 1946 case lltok::LocalVar: // %foo 1947 ID.StrVal = Lex.getStrVal(); 1948 ID.Kind = ValID::t_LocalName; 1949 break; 1950 case lltok::exclaim: // !42, !{...}, or !"foo" 1951 return ParseMetadataValue(ID, PFS); 1952 case lltok::APSInt: 1953 ID.APSIntVal = Lex.getAPSIntVal(); 1954 ID.Kind = ValID::t_APSInt; 1955 break; 1956 case lltok::APFloat: 1957 ID.APFloatVal = Lex.getAPFloatVal(); 1958 ID.Kind = ValID::t_APFloat; 1959 break; 1960 case lltok::kw_true: 1961 ID.ConstantVal = ConstantInt::getTrue(Context); 1962 ID.Kind = ValID::t_Constant; 1963 break; 1964 case lltok::kw_false: 1965 ID.ConstantVal = ConstantInt::getFalse(Context); 1966 ID.Kind = ValID::t_Constant; 1967 break; 1968 case lltok::kw_null: ID.Kind = ValID::t_Null; break; 1969 case lltok::kw_undef: ID.Kind = ValID::t_Undef; break; 1970 case lltok::kw_zeroinitializer: ID.Kind = ValID::t_Zero; break; 1971 1972 case lltok::lbrace: { 1973 // ValID ::= '{' ConstVector '}' 1974 Lex.Lex(); 1975 SmallVector<Constant*, 16> Elts; 1976 if (ParseGlobalValueVector(Elts) || 1977 ParseToken(lltok::rbrace, "expected end of struct constant")) 1978 return true; 1979 1980 ID.ConstantStructElts = new Constant*[Elts.size()]; 1981 ID.UIntVal = Elts.size(); 1982 memcpy(ID.ConstantStructElts, Elts.data(), Elts.size()*sizeof(Elts[0])); 1983 ID.Kind = ValID::t_ConstantStruct; 1984 return false; 1985 } 1986 case lltok::less: { 1987 // ValID ::= '<' ConstVector '>' --> Vector. 1988 // ValID ::= '<' '{' ConstVector '}' '>' --> Packed Struct. 1989 Lex.Lex(); 1990 bool isPackedStruct = EatIfPresent(lltok::lbrace); 1991 1992 SmallVector<Constant*, 16> Elts; 1993 LocTy FirstEltLoc = Lex.getLoc(); 1994 if (ParseGlobalValueVector(Elts) || 1995 (isPackedStruct && 1996 ParseToken(lltok::rbrace, "expected end of packed struct")) || 1997 ParseToken(lltok::greater, "expected end of constant")) 1998 return true; 1999 2000 if (isPackedStruct) { 2001 ID.ConstantStructElts = new Constant*[Elts.size()]; 2002 memcpy(ID.ConstantStructElts, Elts.data(), Elts.size()*sizeof(Elts[0])); 2003 ID.UIntVal = Elts.size(); 2004 ID.Kind = ValID::t_PackedConstantStruct; 2005 return false; 2006 } 2007 2008 if (Elts.empty()) 2009 return Error(ID.Loc, "constant vector must not be empty"); 2010 2011 if (!Elts[0]->getType()->isIntegerTy() && 2012 !Elts[0]->getType()->isFloatingPointTy() && 2013 !Elts[0]->getType()->isPointerTy()) 2014 return Error(FirstEltLoc, 2015 "vector elements must have integer, pointer or floating point type"); 2016 2017 // Verify that all the vector elements have the same type. 2018 for (unsigned i = 1, e = Elts.size(); i != e; ++i) 2019 if (Elts[i]->getType() != Elts[0]->getType()) 2020 return Error(FirstEltLoc, 2021 "vector element #" + Twine(i) + 2022 " is not of type '" + getTypeString(Elts[0]->getType())); 2023 2024 ID.ConstantVal = ConstantVector::get(Elts); 2025 ID.Kind = ValID::t_Constant; 2026 return false; 2027 } 2028 case lltok::lsquare: { // Array Constant 2029 Lex.Lex(); 2030 SmallVector<Constant*, 16> Elts; 2031 LocTy FirstEltLoc = Lex.getLoc(); 2032 if (ParseGlobalValueVector(Elts) || 2033 ParseToken(lltok::rsquare, "expected end of array constant")) 2034 return true; 2035 2036 // Handle empty element. 2037 if (Elts.empty()) { 2038 // Use undef instead of an array because it's inconvenient to determine 2039 // the element type at this point, there being no elements to examine. 2040 ID.Kind = ValID::t_EmptyArray; 2041 return false; 2042 } 2043 2044 if (!Elts[0]->getType()->isFirstClassType()) 2045 return Error(FirstEltLoc, "invalid array element type: " + 2046 getTypeString(Elts[0]->getType())); 2047 2048 ArrayType *ATy = ArrayType::get(Elts[0]->getType(), Elts.size()); 2049 2050 // Verify all elements are correct type! 2051 for (unsigned i = 0, e = Elts.size(); i != e; ++i) { 2052 if (Elts[i]->getType() != Elts[0]->getType()) 2053 return Error(FirstEltLoc, 2054 "array element #" + Twine(i) + 2055 " is not of type '" + getTypeString(Elts[0]->getType())); 2056 } 2057 2058 ID.ConstantVal = ConstantArray::get(ATy, Elts); 2059 ID.Kind = ValID::t_Constant; 2060 return false; 2061 } 2062 case lltok::kw_c: // c "foo" 2063 Lex.Lex(); 2064 ID.ConstantVal = ConstantDataArray::getString(Context, Lex.getStrVal(), 2065 false); 2066 if (ParseToken(lltok::StringConstant, "expected string")) return true; 2067 ID.Kind = ValID::t_Constant; 2068 return false; 2069 2070 case lltok::kw_asm: { 2071 // ValID ::= 'asm' SideEffect? AlignStack? STRINGCONSTANT ',' STRINGCONSTANT 2072 bool HasSideEffect, AlignStack, AsmDialect; 2073 Lex.Lex(); 2074 if (ParseOptionalToken(lltok::kw_sideeffect, HasSideEffect) || 2075 ParseOptionalToken(lltok::kw_alignstack, AlignStack) || 2076 ParseOptionalToken(lltok::kw_inteldialect, AsmDialect) || 2077 ParseStringConstant(ID.StrVal) || 2078 ParseToken(lltok::comma, "expected comma in inline asm expression") || 2079 ParseToken(lltok::StringConstant, "expected constraint string")) 2080 return true; 2081 ID.StrVal2 = Lex.getStrVal(); 2082 ID.UIntVal = unsigned(HasSideEffect) | (unsigned(AlignStack)<<1) | 2083 (unsigned(AsmDialect)<<2); 2084 ID.Kind = ValID::t_InlineAsm; 2085 return false; 2086 } 2087 2088 case lltok::kw_blockaddress: { 2089 // ValID ::= 'blockaddress' '(' @foo ',' %bar ')' 2090 Lex.Lex(); 2091 2092 ValID Fn, Label; 2093 LocTy FnLoc, LabelLoc; 2094 2095 if (ParseToken(lltok::lparen, "expected '(' in block address expression") || 2096 ParseValID(Fn) || 2097 ParseToken(lltok::comma, "expected comma in block address expression")|| 2098 ParseValID(Label) || 2099 ParseToken(lltok::rparen, "expected ')' in block address expression")) 2100 return true; 2101 2102 if (Fn.Kind != ValID::t_GlobalID && Fn.Kind != ValID::t_GlobalName) 2103 return Error(Fn.Loc, "expected function name in blockaddress"); 2104 if (Label.Kind != ValID::t_LocalID && Label.Kind != ValID::t_LocalName) 2105 return Error(Label.Loc, "expected basic block name in blockaddress"); 2106 2107 // Make a global variable as a placeholder for this reference. 2108 GlobalVariable *FwdRef = new GlobalVariable(*M, Type::getInt8Ty(Context), 2109 false, GlobalValue::InternalLinkage, 2110 0, ""); 2111 ForwardRefBlockAddresses[Fn].push_back(std::make_pair(Label, FwdRef)); 2112 ID.ConstantVal = FwdRef; 2113 ID.Kind = ValID::t_Constant; 2114 return false; 2115 } 2116 2117 case lltok::kw_trunc: 2118 case lltok::kw_zext: 2119 case lltok::kw_sext: 2120 case lltok::kw_fptrunc: 2121 case lltok::kw_fpext: 2122 case lltok::kw_bitcast: 2123 case lltok::kw_uitofp: 2124 case lltok::kw_sitofp: 2125 case lltok::kw_fptoui: 2126 case lltok::kw_fptosi: 2127 case lltok::kw_inttoptr: 2128 case lltok::kw_ptrtoint: { 2129 unsigned Opc = Lex.getUIntVal(); 2130 Type *DestTy = 0; 2131 Constant *SrcVal; 2132 Lex.Lex(); 2133 if (ParseToken(lltok::lparen, "expected '(' after constantexpr cast") || 2134 ParseGlobalTypeAndValue(SrcVal) || 2135 ParseToken(lltok::kw_to, "expected 'to' in constantexpr cast") || 2136 ParseType(DestTy) || 2137 ParseToken(lltok::rparen, "expected ')' at end of constantexpr cast")) 2138 return true; 2139 if (!CastInst::castIsValid((Instruction::CastOps)Opc, SrcVal, DestTy)) 2140 return Error(ID.Loc, "invalid cast opcode for cast from '" + 2141 getTypeString(SrcVal->getType()) + "' to '" + 2142 getTypeString(DestTy) + "'"); 2143 ID.ConstantVal = ConstantExpr::getCast((Instruction::CastOps)Opc, 2144 SrcVal, DestTy); 2145 ID.Kind = ValID::t_Constant; 2146 return false; 2147 } 2148 case lltok::kw_extractvalue: { 2149 Lex.Lex(); 2150 Constant *Val; 2151 SmallVector<unsigned, 4> Indices; 2152 if (ParseToken(lltok::lparen, "expected '(' in extractvalue constantexpr")|| 2153 ParseGlobalTypeAndValue(Val) || 2154 ParseIndexList(Indices) || 2155 ParseToken(lltok::rparen, "expected ')' in extractvalue constantexpr")) 2156 return true; 2157 2158 if (!Val->getType()->isAggregateType()) 2159 return Error(ID.Loc, "extractvalue operand must be aggregate type"); 2160 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices)) 2161 return Error(ID.Loc, "invalid indices for extractvalue"); 2162 ID.ConstantVal = ConstantExpr::getExtractValue(Val, Indices); 2163 ID.Kind = ValID::t_Constant; 2164 return false; 2165 } 2166 case lltok::kw_insertvalue: { 2167 Lex.Lex(); 2168 Constant *Val0, *Val1; 2169 SmallVector<unsigned, 4> Indices; 2170 if (ParseToken(lltok::lparen, "expected '(' in insertvalue constantexpr")|| 2171 ParseGlobalTypeAndValue(Val0) || 2172 ParseToken(lltok::comma, "expected comma in insertvalue constantexpr")|| 2173 ParseGlobalTypeAndValue(Val1) || 2174 ParseIndexList(Indices) || 2175 ParseToken(lltok::rparen, "expected ')' in insertvalue constantexpr")) 2176 return true; 2177 if (!Val0->getType()->isAggregateType()) 2178 return Error(ID.Loc, "insertvalue operand must be aggregate type"); 2179 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices)) 2180 return Error(ID.Loc, "invalid indices for insertvalue"); 2181 ID.ConstantVal = ConstantExpr::getInsertValue(Val0, Val1, Indices); 2182 ID.Kind = ValID::t_Constant; 2183 return false; 2184 } 2185 case lltok::kw_icmp: 2186 case lltok::kw_fcmp: { 2187 unsigned PredVal, Opc = Lex.getUIntVal(); 2188 Constant *Val0, *Val1; 2189 Lex.Lex(); 2190 if (ParseCmpPredicate(PredVal, Opc) || 2191 ParseToken(lltok::lparen, "expected '(' in compare constantexpr") || 2192 ParseGlobalTypeAndValue(Val0) || 2193 ParseToken(lltok::comma, "expected comma in compare constantexpr") || 2194 ParseGlobalTypeAndValue(Val1) || 2195 ParseToken(lltok::rparen, "expected ')' in compare constantexpr")) 2196 return true; 2197 2198 if (Val0->getType() != Val1->getType()) 2199 return Error(ID.Loc, "compare operands must have the same type"); 2200 2201 CmpInst::Predicate Pred = (CmpInst::Predicate)PredVal; 2202 2203 if (Opc == Instruction::FCmp) { 2204 if (!Val0->getType()->isFPOrFPVectorTy()) 2205 return Error(ID.Loc, "fcmp requires floating point operands"); 2206 ID.ConstantVal = ConstantExpr::getFCmp(Pred, Val0, Val1); 2207 } else { 2208 assert(Opc == Instruction::ICmp && "Unexpected opcode for CmpInst!"); 2209 if (!Val0->getType()->isIntOrIntVectorTy() && 2210 !Val0->getType()->getScalarType()->isPointerTy()) 2211 return Error(ID.Loc, "icmp requires pointer or integer operands"); 2212 ID.ConstantVal = ConstantExpr::getICmp(Pred, Val0, Val1); 2213 } 2214 ID.Kind = ValID::t_Constant; 2215 return false; 2216 } 2217 2218 // Binary Operators. 2219 case lltok::kw_add: 2220 case lltok::kw_fadd: 2221 case lltok::kw_sub: 2222 case lltok::kw_fsub: 2223 case lltok::kw_mul: 2224 case lltok::kw_fmul: 2225 case lltok::kw_udiv: 2226 case lltok::kw_sdiv: 2227 case lltok::kw_fdiv: 2228 case lltok::kw_urem: 2229 case lltok::kw_srem: 2230 case lltok::kw_frem: 2231 case lltok::kw_shl: 2232 case lltok::kw_lshr: 2233 case lltok::kw_ashr: { 2234 bool NUW = false; 2235 bool NSW = false; 2236 bool Exact = false; 2237 unsigned Opc = Lex.getUIntVal(); 2238 Constant *Val0, *Val1; 2239 Lex.Lex(); 2240 LocTy ModifierLoc = Lex.getLoc(); 2241 if (Opc == Instruction::Add || Opc == Instruction::Sub || 2242 Opc == Instruction::Mul || Opc == Instruction::Shl) { 2243 if (EatIfPresent(lltok::kw_nuw)) 2244 NUW = true; 2245 if (EatIfPresent(lltok::kw_nsw)) { 2246 NSW = true; 2247 if (EatIfPresent(lltok::kw_nuw)) 2248 NUW = true; 2249 } 2250 } else if (Opc == Instruction::SDiv || Opc == Instruction::UDiv || 2251 Opc == Instruction::LShr || Opc == Instruction::AShr) { 2252 if (EatIfPresent(lltok::kw_exact)) 2253 Exact = true; 2254 } 2255 if (ParseToken(lltok::lparen, "expected '(' in binary constantexpr") || 2256 ParseGlobalTypeAndValue(Val0) || 2257 ParseToken(lltok::comma, "expected comma in binary constantexpr") || 2258 ParseGlobalTypeAndValue(Val1) || 2259 ParseToken(lltok::rparen, "expected ')' in binary constantexpr")) 2260 return true; 2261 if (Val0->getType() != Val1->getType()) 2262 return Error(ID.Loc, "operands of constexpr must have same type"); 2263 if (!Val0->getType()->isIntOrIntVectorTy()) { 2264 if (NUW) 2265 return Error(ModifierLoc, "nuw only applies to integer operations"); 2266 if (NSW) 2267 return Error(ModifierLoc, "nsw only applies to integer operations"); 2268 } 2269 // Check that the type is valid for the operator. 2270 switch (Opc) { 2271 case Instruction::Add: 2272 case Instruction::Sub: 2273 case Instruction::Mul: 2274 case Instruction::UDiv: 2275 case Instruction::SDiv: 2276 case Instruction::URem: 2277 case Instruction::SRem: 2278 case Instruction::Shl: 2279 case Instruction::AShr: 2280 case Instruction::LShr: 2281 if (!Val0->getType()->isIntOrIntVectorTy()) 2282 return Error(ID.Loc, "constexpr requires integer operands"); 2283 break; 2284 case Instruction::FAdd: 2285 case Instruction::FSub: 2286 case Instruction::FMul: 2287 case Instruction::FDiv: 2288 case Instruction::FRem: 2289 if (!Val0->getType()->isFPOrFPVectorTy()) 2290 return Error(ID.Loc, "constexpr requires fp operands"); 2291 break; 2292 default: llvm_unreachable("Unknown binary operator!"); 2293 } 2294 unsigned Flags = 0; 2295 if (NUW) Flags |= OverflowingBinaryOperator::NoUnsignedWrap; 2296 if (NSW) Flags |= OverflowingBinaryOperator::NoSignedWrap; 2297 if (Exact) Flags |= PossiblyExactOperator::IsExact; 2298 Constant *C = ConstantExpr::get(Opc, Val0, Val1, Flags); 2299 ID.ConstantVal = C; 2300 ID.Kind = ValID::t_Constant; 2301 return false; 2302 } 2303 2304 // Logical Operations 2305 case lltok::kw_and: 2306 case lltok::kw_or: 2307 case lltok::kw_xor: { 2308 unsigned Opc = Lex.getUIntVal(); 2309 Constant *Val0, *Val1; 2310 Lex.Lex(); 2311 if (ParseToken(lltok::lparen, "expected '(' in logical constantexpr") || 2312 ParseGlobalTypeAndValue(Val0) || 2313 ParseToken(lltok::comma, "expected comma in logical constantexpr") || 2314 ParseGlobalTypeAndValue(Val1) || 2315 ParseToken(lltok::rparen, "expected ')' in logical constantexpr")) 2316 return true; 2317 if (Val0->getType() != Val1->getType()) 2318 return Error(ID.Loc, "operands of constexpr must have same type"); 2319 if (!Val0->getType()->isIntOrIntVectorTy()) 2320 return Error(ID.Loc, 2321 "constexpr requires integer or integer vector operands"); 2322 ID.ConstantVal = ConstantExpr::get(Opc, Val0, Val1); 2323 ID.Kind = ValID::t_Constant; 2324 return false; 2325 } 2326 2327 case lltok::kw_getelementptr: 2328 case lltok::kw_shufflevector: 2329 case lltok::kw_insertelement: 2330 case lltok::kw_extractelement: 2331 case lltok::kw_select: { 2332 unsigned Opc = Lex.getUIntVal(); 2333 SmallVector<Constant*, 16> Elts; 2334 bool InBounds = false; 2335 Lex.Lex(); 2336 if (Opc == Instruction::GetElementPtr) 2337 InBounds = EatIfPresent(lltok::kw_inbounds); 2338 if (ParseToken(lltok::lparen, "expected '(' in constantexpr") || 2339 ParseGlobalValueVector(Elts) || 2340 ParseToken(lltok::rparen, "expected ')' in constantexpr")) 2341 return true; 2342 2343 if (Opc == Instruction::GetElementPtr) { 2344 if (Elts.size() == 0 || 2345 !Elts[0]->getType()->getScalarType()->isPointerTy()) 2346 return Error(ID.Loc, "getelementptr requires pointer operand"); 2347 2348 ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end()); 2349 if (!GetElementPtrInst::getIndexedType(Elts[0]->getType(), Indices)) 2350 return Error(ID.Loc, "invalid indices for getelementptr"); 2351 ID.ConstantVal = ConstantExpr::getGetElementPtr(Elts[0], Indices, 2352 InBounds); 2353 } else if (Opc == Instruction::Select) { 2354 if (Elts.size() != 3) 2355 return Error(ID.Loc, "expected three operands to select"); 2356 if (const char *Reason = SelectInst::areInvalidOperands(Elts[0], Elts[1], 2357 Elts[2])) 2358 return Error(ID.Loc, Reason); 2359 ID.ConstantVal = ConstantExpr::getSelect(Elts[0], Elts[1], Elts[2]); 2360 } else if (Opc == Instruction::ShuffleVector) { 2361 if (Elts.size() != 3) 2362 return Error(ID.Loc, "expected three operands to shufflevector"); 2363 if (!ShuffleVectorInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2364 return Error(ID.Loc, "invalid operands to shufflevector"); 2365 ID.ConstantVal = 2366 ConstantExpr::getShuffleVector(Elts[0], Elts[1],Elts[2]); 2367 } else if (Opc == Instruction::ExtractElement) { 2368 if (Elts.size() != 2) 2369 return Error(ID.Loc, "expected two operands to extractelement"); 2370 if (!ExtractElementInst::isValidOperands(Elts[0], Elts[1])) 2371 return Error(ID.Loc, "invalid extractelement operands"); 2372 ID.ConstantVal = ConstantExpr::getExtractElement(Elts[0], Elts[1]); 2373 } else { 2374 assert(Opc == Instruction::InsertElement && "Unknown opcode"); 2375 if (Elts.size() != 3) 2376 return Error(ID.Loc, "expected three operands to insertelement"); 2377 if (!InsertElementInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2378 return Error(ID.Loc, "invalid insertelement operands"); 2379 ID.ConstantVal = 2380 ConstantExpr::getInsertElement(Elts[0], Elts[1],Elts[2]); 2381 } 2382 2383 ID.Kind = ValID::t_Constant; 2384 return false; 2385 } 2386 } 2387 2388 Lex.Lex(); 2389 return false; 2390} 2391 2392/// ParseGlobalValue - Parse a global value with the specified type. 2393bool LLParser::ParseGlobalValue(Type *Ty, Constant *&C) { 2394 C = 0; 2395 ValID ID; 2396 Value *V = NULL; 2397 bool Parsed = ParseValID(ID) || 2398 ConvertValIDToValue(Ty, ID, V, NULL); 2399 if (V && !(C = dyn_cast<Constant>(V))) 2400 return Error(ID.Loc, "global values must be constants"); 2401 return Parsed; 2402} 2403 2404bool LLParser::ParseGlobalTypeAndValue(Constant *&V) { 2405 Type *Ty = 0; 2406 return ParseType(Ty) || 2407 ParseGlobalValue(Ty, V); 2408} 2409 2410/// ParseGlobalValueVector 2411/// ::= /*empty*/ 2412/// ::= TypeAndValue (',' TypeAndValue)* 2413bool LLParser::ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts) { 2414 // Empty list. 2415 if (Lex.getKind() == lltok::rbrace || 2416 Lex.getKind() == lltok::rsquare || 2417 Lex.getKind() == lltok::greater || 2418 Lex.getKind() == lltok::rparen) 2419 return false; 2420 2421 Constant *C; 2422 if (ParseGlobalTypeAndValue(C)) return true; 2423 Elts.push_back(C); 2424 2425 while (EatIfPresent(lltok::comma)) { 2426 if (ParseGlobalTypeAndValue(C)) return true; 2427 Elts.push_back(C); 2428 } 2429 2430 return false; 2431} 2432 2433bool LLParser::ParseMetadataListValue(ValID &ID, PerFunctionState *PFS) { 2434 assert(Lex.getKind() == lltok::lbrace); 2435 Lex.Lex(); 2436 2437 SmallVector<Value*, 16> Elts; 2438 if (ParseMDNodeVector(Elts, PFS) || 2439 ParseToken(lltok::rbrace, "expected end of metadata node")) 2440 return true; 2441 2442 ID.MDNodeVal = MDNode::get(Context, Elts); 2443 ID.Kind = ValID::t_MDNode; 2444 return false; 2445} 2446 2447/// ParseMetadataValue 2448/// ::= !42 2449/// ::= !{...} 2450/// ::= !"string" 2451bool LLParser::ParseMetadataValue(ValID &ID, PerFunctionState *PFS) { 2452 assert(Lex.getKind() == lltok::exclaim); 2453 Lex.Lex(); 2454 2455 // MDNode: 2456 // !{ ... } 2457 if (Lex.getKind() == lltok::lbrace) 2458 return ParseMetadataListValue(ID, PFS); 2459 2460 // Standalone metadata reference 2461 // !42 2462 if (Lex.getKind() == lltok::APSInt) { 2463 if (ParseMDNodeID(ID.MDNodeVal)) return true; 2464 ID.Kind = ValID::t_MDNode; 2465 return false; 2466 } 2467 2468 // MDString: 2469 // ::= '!' STRINGCONSTANT 2470 if (ParseMDString(ID.MDStringVal)) return true; 2471 ID.Kind = ValID::t_MDString; 2472 return false; 2473} 2474 2475 2476//===----------------------------------------------------------------------===// 2477// Function Parsing. 2478//===----------------------------------------------------------------------===// 2479 2480bool LLParser::ConvertValIDToValue(Type *Ty, ValID &ID, Value *&V, 2481 PerFunctionState *PFS) { 2482 if (Ty->isFunctionTy()) 2483 return Error(ID.Loc, "functions are not values, refer to them as pointers"); 2484 2485 switch (ID.Kind) { 2486 case ValID::t_LocalID: 2487 if (!PFS) return Error(ID.Loc, "invalid use of function-local name"); 2488 V = PFS->GetVal(ID.UIntVal, Ty, ID.Loc); 2489 return (V == 0); 2490 case ValID::t_LocalName: 2491 if (!PFS) return Error(ID.Loc, "invalid use of function-local name"); 2492 V = PFS->GetVal(ID.StrVal, Ty, ID.Loc); 2493 return (V == 0); 2494 case ValID::t_InlineAsm: { 2495 PointerType *PTy = dyn_cast<PointerType>(Ty); 2496 FunctionType *FTy = 2497 PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : 0; 2498 if (!FTy || !InlineAsm::Verify(FTy, ID.StrVal2)) 2499 return Error(ID.Loc, "invalid type for inline asm constraint string"); 2500 V = InlineAsm::get(FTy, ID.StrVal, ID.StrVal2, ID.UIntVal&1, 2501 (ID.UIntVal>>1)&1, (InlineAsm::AsmDialect(ID.UIntVal>>2))); 2502 return false; 2503 } 2504 case ValID::t_MDNode: 2505 if (!Ty->isMetadataTy()) 2506 return Error(ID.Loc, "metadata value must have metadata type"); 2507 V = ID.MDNodeVal; 2508 return false; 2509 case ValID::t_MDString: 2510 if (!Ty->isMetadataTy()) 2511 return Error(ID.Loc, "metadata value must have metadata type"); 2512 V = ID.MDStringVal; 2513 return false; 2514 case ValID::t_GlobalName: 2515 V = GetGlobalVal(ID.StrVal, Ty, ID.Loc); 2516 return V == 0; 2517 case ValID::t_GlobalID: 2518 V = GetGlobalVal(ID.UIntVal, Ty, ID.Loc); 2519 return V == 0; 2520 case ValID::t_APSInt: 2521 if (!Ty->isIntegerTy()) 2522 return Error(ID.Loc, "integer constant must have integer type"); 2523 ID.APSIntVal = ID.APSIntVal.extOrTrunc(Ty->getPrimitiveSizeInBits()); 2524 V = ConstantInt::get(Context, ID.APSIntVal); 2525 return false; 2526 case ValID::t_APFloat: 2527 if (!Ty->isFloatingPointTy() || 2528 !ConstantFP::isValueValidForType(Ty, ID.APFloatVal)) 2529 return Error(ID.Loc, "floating point constant invalid for type"); 2530 2531 // The lexer has no type info, so builds all half, float, and double FP 2532 // constants as double. Fix this here. Long double does not need this. 2533 if (&ID.APFloatVal.getSemantics() == &APFloat::IEEEdouble) { 2534 bool Ignored; 2535 if (Ty->isHalfTy()) 2536 ID.APFloatVal.convert(APFloat::IEEEhalf, APFloat::rmNearestTiesToEven, 2537 &Ignored); 2538 else if (Ty->isFloatTy()) 2539 ID.APFloatVal.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, 2540 &Ignored); 2541 } 2542 V = ConstantFP::get(Context, ID.APFloatVal); 2543 2544 if (V->getType() != Ty) 2545 return Error(ID.Loc, "floating point constant does not have type '" + 2546 getTypeString(Ty) + "'"); 2547 2548 return false; 2549 case ValID::t_Null: 2550 if (!Ty->isPointerTy()) 2551 return Error(ID.Loc, "null must be a pointer type"); 2552 V = ConstantPointerNull::get(cast<PointerType>(Ty)); 2553 return false; 2554 case ValID::t_Undef: 2555 // FIXME: LabelTy should not be a first-class type. 2556 if (!Ty->isFirstClassType() || Ty->isLabelTy()) 2557 return Error(ID.Loc, "invalid type for undef constant"); 2558 V = UndefValue::get(Ty); 2559 return false; 2560 case ValID::t_EmptyArray: 2561 if (!Ty->isArrayTy() || cast<ArrayType>(Ty)->getNumElements() != 0) 2562 return Error(ID.Loc, "invalid empty array initializer"); 2563 V = UndefValue::get(Ty); 2564 return false; 2565 case ValID::t_Zero: 2566 // FIXME: LabelTy should not be a first-class type. 2567 if (!Ty->isFirstClassType() || Ty->isLabelTy()) 2568 return Error(ID.Loc, "invalid type for null constant"); 2569 V = Constant::getNullValue(Ty); 2570 return false; 2571 case ValID::t_Constant: 2572 if (ID.ConstantVal->getType() != Ty) 2573 return Error(ID.Loc, "constant expression type mismatch"); 2574 2575 V = ID.ConstantVal; 2576 return false; 2577 case ValID::t_ConstantStruct: 2578 case ValID::t_PackedConstantStruct: 2579 if (StructType *ST = dyn_cast<StructType>(Ty)) { 2580 if (ST->getNumElements() != ID.UIntVal) 2581 return Error(ID.Loc, 2582 "initializer with struct type has wrong # elements"); 2583 if (ST->isPacked() != (ID.Kind == ValID::t_PackedConstantStruct)) 2584 return Error(ID.Loc, "packed'ness of initializer and type don't match"); 2585 2586 // Verify that the elements are compatible with the structtype. 2587 for (unsigned i = 0, e = ID.UIntVal; i != e; ++i) 2588 if (ID.ConstantStructElts[i]->getType() != ST->getElementType(i)) 2589 return Error(ID.Loc, "element " + Twine(i) + 2590 " of struct initializer doesn't match struct element type"); 2591 2592 V = ConstantStruct::get(ST, makeArrayRef(ID.ConstantStructElts, 2593 ID.UIntVal)); 2594 } else 2595 return Error(ID.Loc, "constant expression type mismatch"); 2596 return false; 2597 } 2598 llvm_unreachable("Invalid ValID"); 2599} 2600 2601bool LLParser::ParseValue(Type *Ty, Value *&V, PerFunctionState *PFS) { 2602 V = 0; 2603 ValID ID; 2604 return ParseValID(ID, PFS) || 2605 ConvertValIDToValue(Ty, ID, V, PFS); 2606} 2607 2608bool LLParser::ParseTypeAndValue(Value *&V, PerFunctionState *PFS) { 2609 Type *Ty = 0; 2610 return ParseType(Ty) || 2611 ParseValue(Ty, V, PFS); 2612} 2613 2614bool LLParser::ParseTypeAndBasicBlock(BasicBlock *&BB, LocTy &Loc, 2615 PerFunctionState &PFS) { 2616 Value *V; 2617 Loc = Lex.getLoc(); 2618 if (ParseTypeAndValue(V, PFS)) return true; 2619 if (!isa<BasicBlock>(V)) 2620 return Error(Loc, "expected a basic block"); 2621 BB = cast<BasicBlock>(V); 2622 return false; 2623} 2624 2625 2626/// FunctionHeader 2627/// ::= OptionalLinkage OptionalVisibility OptionalCallingConv OptRetAttrs 2628/// OptUnnamedAddr Type GlobalName '(' ArgList ')' OptFuncAttrs OptSection 2629/// OptionalAlign OptGC 2630bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) { 2631 // Parse the linkage. 2632 LocTy LinkageLoc = Lex.getLoc(); 2633 unsigned Linkage; 2634 2635 unsigned Visibility; 2636 Attributes RetAttrs; 2637 CallingConv::ID CC; 2638 Type *RetType = 0; 2639 LocTy RetTypeLoc = Lex.getLoc(); 2640 if (ParseOptionalLinkage(Linkage) || 2641 ParseOptionalVisibility(Visibility) || 2642 ParseOptionalCallingConv(CC) || 2643 ParseOptionalAttrs(RetAttrs, 1) || 2644 ParseType(RetType, RetTypeLoc, true /*void allowed*/)) 2645 return true; 2646 2647 // Verify that the linkage is ok. 2648 switch ((GlobalValue::LinkageTypes)Linkage) { 2649 case GlobalValue::ExternalLinkage: 2650 break; // always ok. 2651 case GlobalValue::DLLImportLinkage: 2652 case GlobalValue::ExternalWeakLinkage: 2653 if (isDefine) 2654 return Error(LinkageLoc, "invalid linkage for function definition"); 2655 break; 2656 case GlobalValue::PrivateLinkage: 2657 case GlobalValue::LinkerPrivateLinkage: 2658 case GlobalValue::LinkerPrivateWeakLinkage: 2659 case GlobalValue::InternalLinkage: 2660 case GlobalValue::AvailableExternallyLinkage: 2661 case GlobalValue::LinkOnceAnyLinkage: 2662 case GlobalValue::LinkOnceODRLinkage: 2663 case GlobalValue::LinkOnceODRAutoHideLinkage: 2664 case GlobalValue::WeakAnyLinkage: 2665 case GlobalValue::WeakODRLinkage: 2666 case GlobalValue::DLLExportLinkage: 2667 if (!isDefine) 2668 return Error(LinkageLoc, "invalid linkage for function declaration"); 2669 break; 2670 case GlobalValue::AppendingLinkage: 2671 case GlobalValue::CommonLinkage: 2672 return Error(LinkageLoc, "invalid function linkage type"); 2673 } 2674 2675 if (!FunctionType::isValidReturnType(RetType)) 2676 return Error(RetTypeLoc, "invalid function return type"); 2677 2678 LocTy NameLoc = Lex.getLoc(); 2679 2680 std::string FunctionName; 2681 if (Lex.getKind() == lltok::GlobalVar) { 2682 FunctionName = Lex.getStrVal(); 2683 } else if (Lex.getKind() == lltok::GlobalID) { // @42 is ok. 2684 unsigned NameID = Lex.getUIntVal(); 2685 2686 if (NameID != NumberedVals.size()) 2687 return TokError("function expected to be numbered '%" + 2688 Twine(NumberedVals.size()) + "'"); 2689 } else { 2690 return TokError("expected function name"); 2691 } 2692 2693 Lex.Lex(); 2694 2695 if (Lex.getKind() != lltok::lparen) 2696 return TokError("expected '(' in function argument list"); 2697 2698 SmallVector<ArgInfo, 8> ArgList; 2699 bool isVarArg; 2700 Attributes FuncAttrs; 2701 std::string Section; 2702 unsigned Alignment; 2703 std::string GC; 2704 bool UnnamedAddr; 2705 LocTy UnnamedAddrLoc; 2706 2707 if (ParseArgumentList(ArgList, isVarArg) || 2708 ParseOptionalToken(lltok::kw_unnamed_addr, UnnamedAddr, 2709 &UnnamedAddrLoc) || 2710 ParseOptionalAttrs(FuncAttrs, 2) || 2711 (EatIfPresent(lltok::kw_section) && 2712 ParseStringConstant(Section)) || 2713 ParseOptionalAlignment(Alignment) || 2714 (EatIfPresent(lltok::kw_gc) && 2715 ParseStringConstant(GC))) 2716 return true; 2717 2718 // If the alignment was parsed as an attribute, move to the alignment field. 2719 if (FuncAttrs & Attribute::Alignment) { 2720 Alignment = Attribute::getAlignmentFromAttrs(FuncAttrs); 2721 FuncAttrs &= ~Attribute::Alignment; 2722 } 2723 2724 // Okay, if we got here, the function is syntactically valid. Convert types 2725 // and do semantic checks. 2726 std::vector<Type*> ParamTypeList; 2727 SmallVector<AttributeWithIndex, 8> Attrs; 2728 2729 if (RetAttrs != Attribute::None) 2730 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 2731 2732 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 2733 ParamTypeList.push_back(ArgList[i].Ty); 2734 if (ArgList[i].Attrs != Attribute::None) 2735 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 2736 } 2737 2738 if (FuncAttrs != Attribute::None) 2739 Attrs.push_back(AttributeWithIndex::get(~0, FuncAttrs)); 2740 2741 AttrListPtr PAL = AttrListPtr::get(Attrs); 2742 2743 if (PAL.paramHasAttr(1, Attribute::StructRet) && !RetType->isVoidTy()) 2744 return Error(RetTypeLoc, "functions with 'sret' argument must return void"); 2745 2746 FunctionType *FT = 2747 FunctionType::get(RetType, ParamTypeList, isVarArg); 2748 PointerType *PFT = PointerType::getUnqual(FT); 2749 2750 Fn = 0; 2751 if (!FunctionName.empty()) { 2752 // If this was a definition of a forward reference, remove the definition 2753 // from the forward reference table and fill in the forward ref. 2754 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator FRVI = 2755 ForwardRefVals.find(FunctionName); 2756 if (FRVI != ForwardRefVals.end()) { 2757 Fn = M->getFunction(FunctionName); 2758 if (Fn->getType() != PFT) 2759 return Error(FRVI->second.second, "invalid forward reference to " 2760 "function '" + FunctionName + "' with wrong type!"); 2761 2762 ForwardRefVals.erase(FRVI); 2763 } else if ((Fn = M->getFunction(FunctionName))) { 2764 // Reject redefinitions. 2765 return Error(NameLoc, "invalid redefinition of function '" + 2766 FunctionName + "'"); 2767 } else if (M->getNamedValue(FunctionName)) { 2768 return Error(NameLoc, "redefinition of function '@" + FunctionName + "'"); 2769 } 2770 2771 } else { 2772 // If this is a definition of a forward referenced function, make sure the 2773 // types agree. 2774 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator I 2775 = ForwardRefValIDs.find(NumberedVals.size()); 2776 if (I != ForwardRefValIDs.end()) { 2777 Fn = cast<Function>(I->second.first); 2778 if (Fn->getType() != PFT) 2779 return Error(NameLoc, "type of definition and forward reference of '@" + 2780 Twine(NumberedVals.size()) + "' disagree"); 2781 ForwardRefValIDs.erase(I); 2782 } 2783 } 2784 2785 if (Fn == 0) 2786 Fn = Function::Create(FT, GlobalValue::ExternalLinkage, FunctionName, M); 2787 else // Move the forward-reference to the correct spot in the module. 2788 M->getFunctionList().splice(M->end(), M->getFunctionList(), Fn); 2789 2790 if (FunctionName.empty()) 2791 NumberedVals.push_back(Fn); 2792 2793 Fn->setLinkage((GlobalValue::LinkageTypes)Linkage); 2794 Fn->setVisibility((GlobalValue::VisibilityTypes)Visibility); 2795 Fn->setCallingConv(CC); 2796 Fn->setAttributes(PAL); 2797 Fn->setUnnamedAddr(UnnamedAddr); 2798 Fn->setAlignment(Alignment); 2799 Fn->setSection(Section); 2800 if (!GC.empty()) Fn->setGC(GC.c_str()); 2801 2802 // Add all of the arguments we parsed to the function. 2803 Function::arg_iterator ArgIt = Fn->arg_begin(); 2804 for (unsigned i = 0, e = ArgList.size(); i != e; ++i, ++ArgIt) { 2805 // If the argument has a name, insert it into the argument symbol table. 2806 if (ArgList[i].Name.empty()) continue; 2807 2808 // Set the name, if it conflicted, it will be auto-renamed. 2809 ArgIt->setName(ArgList[i].Name); 2810 2811 if (ArgIt->getName() != ArgList[i].Name) 2812 return Error(ArgList[i].Loc, "redefinition of argument '%" + 2813 ArgList[i].Name + "'"); 2814 } 2815 2816 return false; 2817} 2818 2819 2820/// ParseFunctionBody 2821/// ::= '{' BasicBlock+ '}' 2822/// 2823bool LLParser::ParseFunctionBody(Function &Fn) { 2824 if (Lex.getKind() != lltok::lbrace) 2825 return TokError("expected '{' in function body"); 2826 Lex.Lex(); // eat the {. 2827 2828 int FunctionNumber = -1; 2829 if (!Fn.hasName()) FunctionNumber = NumberedVals.size()-1; 2830 2831 PerFunctionState PFS(*this, Fn, FunctionNumber); 2832 2833 // We need at least one basic block. 2834 if (Lex.getKind() == lltok::rbrace) 2835 return TokError("function body requires at least one basic block"); 2836 2837 while (Lex.getKind() != lltok::rbrace) 2838 if (ParseBasicBlock(PFS)) return true; 2839 2840 // Eat the }. 2841 Lex.Lex(); 2842 2843 // Verify function is ok. 2844 return PFS.FinishFunction(); 2845} 2846 2847/// ParseBasicBlock 2848/// ::= LabelStr? Instruction* 2849bool LLParser::ParseBasicBlock(PerFunctionState &PFS) { 2850 // If this basic block starts out with a name, remember it. 2851 std::string Name; 2852 LocTy NameLoc = Lex.getLoc(); 2853 if (Lex.getKind() == lltok::LabelStr) { 2854 Name = Lex.getStrVal(); 2855 Lex.Lex(); 2856 } 2857 2858 BasicBlock *BB = PFS.DefineBB(Name, NameLoc); 2859 if (BB == 0) return true; 2860 2861 std::string NameStr; 2862 2863 // Parse the instructions in this block until we get a terminator. 2864 Instruction *Inst; 2865 SmallVector<std::pair<unsigned, MDNode *>, 4> MetadataOnInst; 2866 do { 2867 // This instruction may have three possibilities for a name: a) none 2868 // specified, b) name specified "%foo =", c) number specified: "%4 =". 2869 LocTy NameLoc = Lex.getLoc(); 2870 int NameID = -1; 2871 NameStr = ""; 2872 2873 if (Lex.getKind() == lltok::LocalVarID) { 2874 NameID = Lex.getUIntVal(); 2875 Lex.Lex(); 2876 if (ParseToken(lltok::equal, "expected '=' after instruction id")) 2877 return true; 2878 } else if (Lex.getKind() == lltok::LocalVar) { 2879 NameStr = Lex.getStrVal(); 2880 Lex.Lex(); 2881 if (ParseToken(lltok::equal, "expected '=' after instruction name")) 2882 return true; 2883 } 2884 2885 switch (ParseInstruction(Inst, BB, PFS)) { 2886 default: llvm_unreachable("Unknown ParseInstruction result!"); 2887 case InstError: return true; 2888 case InstNormal: 2889 BB->getInstList().push_back(Inst); 2890 2891 // With a normal result, we check to see if the instruction is followed by 2892 // a comma and metadata. 2893 if (EatIfPresent(lltok::comma)) 2894 if (ParseInstructionMetadata(Inst, &PFS)) 2895 return true; 2896 break; 2897 case InstExtraComma: 2898 BB->getInstList().push_back(Inst); 2899 2900 // If the instruction parser ate an extra comma at the end of it, it 2901 // *must* be followed by metadata. 2902 if (ParseInstructionMetadata(Inst, &PFS)) 2903 return true; 2904 break; 2905 } 2906 2907 // Set the name on the instruction. 2908 if (PFS.SetInstName(NameID, NameStr, NameLoc, Inst)) return true; 2909 } while (!isa<TerminatorInst>(Inst)); 2910 2911 return false; 2912} 2913 2914//===----------------------------------------------------------------------===// 2915// Instruction Parsing. 2916//===----------------------------------------------------------------------===// 2917 2918/// ParseInstruction - Parse one of the many different instructions. 2919/// 2920int LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB, 2921 PerFunctionState &PFS) { 2922 lltok::Kind Token = Lex.getKind(); 2923 if (Token == lltok::Eof) 2924 return TokError("found end of file when expecting more instructions"); 2925 LocTy Loc = Lex.getLoc(); 2926 unsigned KeywordVal = Lex.getUIntVal(); 2927 Lex.Lex(); // Eat the keyword. 2928 2929 switch (Token) { 2930 default: return Error(Loc, "expected instruction opcode"); 2931 // Terminator Instructions. 2932 case lltok::kw_unreachable: Inst = new UnreachableInst(Context); return false; 2933 case lltok::kw_ret: return ParseRet(Inst, BB, PFS); 2934 case lltok::kw_br: return ParseBr(Inst, PFS); 2935 case lltok::kw_switch: return ParseSwitch(Inst, PFS); 2936 case lltok::kw_indirectbr: return ParseIndirectBr(Inst, PFS); 2937 case lltok::kw_invoke: return ParseInvoke(Inst, PFS); 2938 case lltok::kw_resume: return ParseResume(Inst, PFS); 2939 // Binary Operators. 2940 case lltok::kw_add: 2941 case lltok::kw_sub: 2942 case lltok::kw_mul: 2943 case lltok::kw_shl: { 2944 bool NUW = EatIfPresent(lltok::kw_nuw); 2945 bool NSW = EatIfPresent(lltok::kw_nsw); 2946 if (!NUW) NUW = EatIfPresent(lltok::kw_nuw); 2947 2948 if (ParseArithmetic(Inst, PFS, KeywordVal, 1)) return true; 2949 2950 if (NUW) cast<BinaryOperator>(Inst)->setHasNoUnsignedWrap(true); 2951 if (NSW) cast<BinaryOperator>(Inst)->setHasNoSignedWrap(true); 2952 return false; 2953 } 2954 case lltok::kw_fadd: 2955 case lltok::kw_fsub: 2956 case lltok::kw_fmul: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2957 2958 case lltok::kw_sdiv: 2959 case lltok::kw_udiv: 2960 case lltok::kw_lshr: 2961 case lltok::kw_ashr: { 2962 bool Exact = EatIfPresent(lltok::kw_exact); 2963 2964 if (ParseArithmetic(Inst, PFS, KeywordVal, 1)) return true; 2965 if (Exact) cast<BinaryOperator>(Inst)->setIsExact(true); 2966 return false; 2967 } 2968 2969 case lltok::kw_urem: 2970 case lltok::kw_srem: return ParseArithmetic(Inst, PFS, KeywordVal, 1); 2971 case lltok::kw_fdiv: 2972 case lltok::kw_frem: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2973 case lltok::kw_and: 2974 case lltok::kw_or: 2975 case lltok::kw_xor: return ParseLogical(Inst, PFS, KeywordVal); 2976 case lltok::kw_icmp: 2977 case lltok::kw_fcmp: return ParseCompare(Inst, PFS, KeywordVal); 2978 // Casts. 2979 case lltok::kw_trunc: 2980 case lltok::kw_zext: 2981 case lltok::kw_sext: 2982 case lltok::kw_fptrunc: 2983 case lltok::kw_fpext: 2984 case lltok::kw_bitcast: 2985 case lltok::kw_uitofp: 2986 case lltok::kw_sitofp: 2987 case lltok::kw_fptoui: 2988 case lltok::kw_fptosi: 2989 case lltok::kw_inttoptr: 2990 case lltok::kw_ptrtoint: return ParseCast(Inst, PFS, KeywordVal); 2991 // Other. 2992 case lltok::kw_select: return ParseSelect(Inst, PFS); 2993 case lltok::kw_va_arg: return ParseVA_Arg(Inst, PFS); 2994 case lltok::kw_extractelement: return ParseExtractElement(Inst, PFS); 2995 case lltok::kw_insertelement: return ParseInsertElement(Inst, PFS); 2996 case lltok::kw_shufflevector: return ParseShuffleVector(Inst, PFS); 2997 case lltok::kw_phi: return ParsePHI(Inst, PFS); 2998 case lltok::kw_landingpad: return ParseLandingPad(Inst, PFS); 2999 case lltok::kw_call: return ParseCall(Inst, PFS, false); 3000 case lltok::kw_tail: return ParseCall(Inst, PFS, true); 3001 // Memory. 3002 case lltok::kw_alloca: return ParseAlloc(Inst, PFS); 3003 case lltok::kw_load: return ParseLoad(Inst, PFS); 3004 case lltok::kw_store: return ParseStore(Inst, PFS); 3005 case lltok::kw_cmpxchg: return ParseCmpXchg(Inst, PFS); 3006 case lltok::kw_atomicrmw: return ParseAtomicRMW(Inst, PFS); 3007 case lltok::kw_fence: return ParseFence(Inst, PFS); 3008 case lltok::kw_getelementptr: return ParseGetElementPtr(Inst, PFS); 3009 case lltok::kw_extractvalue: return ParseExtractValue(Inst, PFS); 3010 case lltok::kw_insertvalue: return ParseInsertValue(Inst, PFS); 3011 } 3012} 3013 3014/// ParseCmpPredicate - Parse an integer or fp predicate, based on Kind. 3015bool LLParser::ParseCmpPredicate(unsigned &P, unsigned Opc) { 3016 if (Opc == Instruction::FCmp) { 3017 switch (Lex.getKind()) { 3018 default: TokError("expected fcmp predicate (e.g. 'oeq')"); 3019 case lltok::kw_oeq: P = CmpInst::FCMP_OEQ; break; 3020 case lltok::kw_one: P = CmpInst::FCMP_ONE; break; 3021 case lltok::kw_olt: P = CmpInst::FCMP_OLT; break; 3022 case lltok::kw_ogt: P = CmpInst::FCMP_OGT; break; 3023 case lltok::kw_ole: P = CmpInst::FCMP_OLE; break; 3024 case lltok::kw_oge: P = CmpInst::FCMP_OGE; break; 3025 case lltok::kw_ord: P = CmpInst::FCMP_ORD; break; 3026 case lltok::kw_uno: P = CmpInst::FCMP_UNO; break; 3027 case lltok::kw_ueq: P = CmpInst::FCMP_UEQ; break; 3028 case lltok::kw_une: P = CmpInst::FCMP_UNE; break; 3029 case lltok::kw_ult: P = CmpInst::FCMP_ULT; break; 3030 case lltok::kw_ugt: P = CmpInst::FCMP_UGT; break; 3031 case lltok::kw_ule: P = CmpInst::FCMP_ULE; break; 3032 case lltok::kw_uge: P = CmpInst::FCMP_UGE; break; 3033 case lltok::kw_true: P = CmpInst::FCMP_TRUE; break; 3034 case lltok::kw_false: P = CmpInst::FCMP_FALSE; break; 3035 } 3036 } else { 3037 switch (Lex.getKind()) { 3038 default: TokError("expected icmp predicate (e.g. 'eq')"); 3039 case lltok::kw_eq: P = CmpInst::ICMP_EQ; break; 3040 case lltok::kw_ne: P = CmpInst::ICMP_NE; break; 3041 case lltok::kw_slt: P = CmpInst::ICMP_SLT; break; 3042 case lltok::kw_sgt: P = CmpInst::ICMP_SGT; break; 3043 case lltok::kw_sle: P = CmpInst::ICMP_SLE; break; 3044 case lltok::kw_sge: P = CmpInst::ICMP_SGE; break; 3045 case lltok::kw_ult: P = CmpInst::ICMP_ULT; break; 3046 case lltok::kw_ugt: P = CmpInst::ICMP_UGT; break; 3047 case lltok::kw_ule: P = CmpInst::ICMP_ULE; break; 3048 case lltok::kw_uge: P = CmpInst::ICMP_UGE; break; 3049 } 3050 } 3051 Lex.Lex(); 3052 return false; 3053} 3054 3055//===----------------------------------------------------------------------===// 3056// Terminator Instructions. 3057//===----------------------------------------------------------------------===// 3058 3059/// ParseRet - Parse a return instruction. 3060/// ::= 'ret' void (',' !dbg, !1)* 3061/// ::= 'ret' TypeAndValue (',' !dbg, !1)* 3062bool LLParser::ParseRet(Instruction *&Inst, BasicBlock *BB, 3063 PerFunctionState &PFS) { 3064 SMLoc TypeLoc = Lex.getLoc(); 3065 Type *Ty = 0; 3066 if (ParseType(Ty, true /*void allowed*/)) return true; 3067 3068 Type *ResType = PFS.getFunction().getReturnType(); 3069 3070 if (Ty->isVoidTy()) { 3071 if (!ResType->isVoidTy()) 3072 return Error(TypeLoc, "value doesn't match function result type '" + 3073 getTypeString(ResType) + "'"); 3074 3075 Inst = ReturnInst::Create(Context); 3076 return false; 3077 } 3078 3079 Value *RV; 3080 if (ParseValue(Ty, RV, PFS)) return true; 3081 3082 if (ResType != RV->getType()) 3083 return Error(TypeLoc, "value doesn't match function result type '" + 3084 getTypeString(ResType) + "'"); 3085 3086 Inst = ReturnInst::Create(Context, RV); 3087 return false; 3088} 3089 3090 3091/// ParseBr 3092/// ::= 'br' TypeAndValue 3093/// ::= 'br' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3094bool LLParser::ParseBr(Instruction *&Inst, PerFunctionState &PFS) { 3095 LocTy Loc, Loc2; 3096 Value *Op0; 3097 BasicBlock *Op1, *Op2; 3098 if (ParseTypeAndValue(Op0, Loc, PFS)) return true; 3099 3100 if (BasicBlock *BB = dyn_cast<BasicBlock>(Op0)) { 3101 Inst = BranchInst::Create(BB); 3102 return false; 3103 } 3104 3105 if (Op0->getType() != Type::getInt1Ty(Context)) 3106 return Error(Loc, "branch condition must have 'i1' type"); 3107 3108 if (ParseToken(lltok::comma, "expected ',' after branch condition") || 3109 ParseTypeAndBasicBlock(Op1, Loc, PFS) || 3110 ParseToken(lltok::comma, "expected ',' after true destination") || 3111 ParseTypeAndBasicBlock(Op2, Loc2, PFS)) 3112 return true; 3113 3114 Inst = BranchInst::Create(Op1, Op2, Op0); 3115 return false; 3116} 3117 3118/// ParseSwitch 3119/// Instruction 3120/// ::= 'switch' TypeAndValue ',' TypeAndValue '[' JumpTable ']' 3121/// JumpTable 3122/// ::= (TypeAndValue ',' TypeAndValue)* 3123bool LLParser::ParseSwitch(Instruction *&Inst, PerFunctionState &PFS) { 3124 LocTy CondLoc, BBLoc; 3125 Value *Cond; 3126 BasicBlock *DefaultBB; 3127 if (ParseTypeAndValue(Cond, CondLoc, PFS) || 3128 ParseToken(lltok::comma, "expected ',' after switch condition") || 3129 ParseTypeAndBasicBlock(DefaultBB, BBLoc, PFS) || 3130 ParseToken(lltok::lsquare, "expected '[' with switch table")) 3131 return true; 3132 3133 if (!Cond->getType()->isIntegerTy()) 3134 return Error(CondLoc, "switch condition must have integer type"); 3135 3136 // Parse the jump table pairs. 3137 SmallPtrSet<Value*, 32> SeenCases; 3138 SmallVector<std::pair<ConstantInt*, BasicBlock*>, 32> Table; 3139 while (Lex.getKind() != lltok::rsquare) { 3140 Value *Constant; 3141 BasicBlock *DestBB; 3142 3143 if (ParseTypeAndValue(Constant, CondLoc, PFS) || 3144 ParseToken(lltok::comma, "expected ',' after case value") || 3145 ParseTypeAndBasicBlock(DestBB, PFS)) 3146 return true; 3147 3148 if (!SeenCases.insert(Constant)) 3149 return Error(CondLoc, "duplicate case value in switch"); 3150 if (!isa<ConstantInt>(Constant)) 3151 return Error(CondLoc, "case value is not a constant integer"); 3152 3153 Table.push_back(std::make_pair(cast<ConstantInt>(Constant), DestBB)); 3154 } 3155 3156 Lex.Lex(); // Eat the ']'. 3157 3158 SwitchInst *SI = SwitchInst::Create(Cond, DefaultBB, Table.size()); 3159 for (unsigned i = 0, e = Table.size(); i != e; ++i) 3160 SI->addCase(Table[i].first, Table[i].second); 3161 Inst = SI; 3162 return false; 3163} 3164 3165/// ParseIndirectBr 3166/// Instruction 3167/// ::= 'indirectbr' TypeAndValue ',' '[' LabelList ']' 3168bool LLParser::ParseIndirectBr(Instruction *&Inst, PerFunctionState &PFS) { 3169 LocTy AddrLoc; 3170 Value *Address; 3171 if (ParseTypeAndValue(Address, AddrLoc, PFS) || 3172 ParseToken(lltok::comma, "expected ',' after indirectbr address") || 3173 ParseToken(lltok::lsquare, "expected '[' with indirectbr")) 3174 return true; 3175 3176 if (!Address->getType()->isPointerTy()) 3177 return Error(AddrLoc, "indirectbr address must have pointer type"); 3178 3179 // Parse the destination list. 3180 SmallVector<BasicBlock*, 16> DestList; 3181 3182 if (Lex.getKind() != lltok::rsquare) { 3183 BasicBlock *DestBB; 3184 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3185 return true; 3186 DestList.push_back(DestBB); 3187 3188 while (EatIfPresent(lltok::comma)) { 3189 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3190 return true; 3191 DestList.push_back(DestBB); 3192 } 3193 } 3194 3195 if (ParseToken(lltok::rsquare, "expected ']' at end of block list")) 3196 return true; 3197 3198 IndirectBrInst *IBI = IndirectBrInst::Create(Address, DestList.size()); 3199 for (unsigned i = 0, e = DestList.size(); i != e; ++i) 3200 IBI->addDestination(DestList[i]); 3201 Inst = IBI; 3202 return false; 3203} 3204 3205 3206/// ParseInvoke 3207/// ::= 'invoke' OptionalCallingConv OptionalAttrs Type Value ParamList 3208/// OptionalAttrs 'to' TypeAndValue 'unwind' TypeAndValue 3209bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) { 3210 LocTy CallLoc = Lex.getLoc(); 3211 Attributes RetAttrs, FnAttrs; 3212 CallingConv::ID CC; 3213 Type *RetType = 0; 3214 LocTy RetTypeLoc; 3215 ValID CalleeID; 3216 SmallVector<ParamInfo, 16> ArgList; 3217 3218 BasicBlock *NormalBB, *UnwindBB; 3219 if (ParseOptionalCallingConv(CC) || 3220 ParseOptionalAttrs(RetAttrs, 1) || 3221 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3222 ParseValID(CalleeID) || 3223 ParseParameterList(ArgList, PFS) || 3224 ParseOptionalAttrs(FnAttrs, 2) || 3225 ParseToken(lltok::kw_to, "expected 'to' in invoke") || 3226 ParseTypeAndBasicBlock(NormalBB, PFS) || 3227 ParseToken(lltok::kw_unwind, "expected 'unwind' in invoke") || 3228 ParseTypeAndBasicBlock(UnwindBB, PFS)) 3229 return true; 3230 3231 // If RetType is a non-function pointer type, then this is the short syntax 3232 // for the call, which means that RetType is just the return type. Infer the 3233 // rest of the function argument types from the arguments that are present. 3234 PointerType *PFTy = 0; 3235 FunctionType *Ty = 0; 3236 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3237 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3238 // Pull out the types of all of the arguments... 3239 std::vector<Type*> ParamTypes; 3240 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3241 ParamTypes.push_back(ArgList[i].V->getType()); 3242 3243 if (!FunctionType::isValidReturnType(RetType)) 3244 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3245 3246 Ty = FunctionType::get(RetType, ParamTypes, false); 3247 PFTy = PointerType::getUnqual(Ty); 3248 } 3249 3250 // Look up the callee. 3251 Value *Callee; 3252 if (ConvertValIDToValue(PFTy, CalleeID, Callee, &PFS)) return true; 3253 3254 // Set up the Attributes for the function. 3255 SmallVector<AttributeWithIndex, 8> Attrs; 3256 if (RetAttrs != Attribute::None) 3257 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3258 3259 SmallVector<Value*, 8> Args; 3260 3261 // Loop through FunctionType's arguments and ensure they are specified 3262 // correctly. Also, gather any parameter attributes. 3263 FunctionType::param_iterator I = Ty->param_begin(); 3264 FunctionType::param_iterator E = Ty->param_end(); 3265 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3266 Type *ExpectedTy = 0; 3267 if (I != E) { 3268 ExpectedTy = *I++; 3269 } else if (!Ty->isVarArg()) { 3270 return Error(ArgList[i].Loc, "too many arguments specified"); 3271 } 3272 3273 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3274 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3275 getTypeString(ExpectedTy) + "'"); 3276 Args.push_back(ArgList[i].V); 3277 if (ArgList[i].Attrs != Attribute::None) 3278 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3279 } 3280 3281 if (I != E) 3282 return Error(CallLoc, "not enough parameters specified for call"); 3283 3284 if (FnAttrs != Attribute::None) 3285 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3286 3287 // Finish off the Attributes and check them 3288 AttrListPtr PAL = AttrListPtr::get(Attrs); 3289 3290 InvokeInst *II = InvokeInst::Create(Callee, NormalBB, UnwindBB, Args); 3291 II->setCallingConv(CC); 3292 II->setAttributes(PAL); 3293 Inst = II; 3294 return false; 3295} 3296 3297/// ParseResume 3298/// ::= 'resume' TypeAndValue 3299bool LLParser::ParseResume(Instruction *&Inst, PerFunctionState &PFS) { 3300 Value *Exn; LocTy ExnLoc; 3301 if (ParseTypeAndValue(Exn, ExnLoc, PFS)) 3302 return true; 3303 3304 ResumeInst *RI = ResumeInst::Create(Exn); 3305 Inst = RI; 3306 return false; 3307} 3308 3309//===----------------------------------------------------------------------===// 3310// Binary Operators. 3311//===----------------------------------------------------------------------===// 3312 3313/// ParseArithmetic 3314/// ::= ArithmeticOps TypeAndValue ',' Value 3315/// 3316/// If OperandType is 0, then any FP or integer operand is allowed. If it is 1, 3317/// then any integer operand is allowed, if it is 2, any fp operand is allowed. 3318bool LLParser::ParseArithmetic(Instruction *&Inst, PerFunctionState &PFS, 3319 unsigned Opc, unsigned OperandType) { 3320 LocTy Loc; Value *LHS, *RHS; 3321 if (ParseTypeAndValue(LHS, Loc, PFS) || 3322 ParseToken(lltok::comma, "expected ',' in arithmetic operation") || 3323 ParseValue(LHS->getType(), RHS, PFS)) 3324 return true; 3325 3326 bool Valid; 3327 switch (OperandType) { 3328 default: llvm_unreachable("Unknown operand type!"); 3329 case 0: // int or FP. 3330 Valid = LHS->getType()->isIntOrIntVectorTy() || 3331 LHS->getType()->isFPOrFPVectorTy(); 3332 break; 3333 case 1: Valid = LHS->getType()->isIntOrIntVectorTy(); break; 3334 case 2: Valid = LHS->getType()->isFPOrFPVectorTy(); break; 3335 } 3336 3337 if (!Valid) 3338 return Error(Loc, "invalid operand type for instruction"); 3339 3340 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3341 return false; 3342} 3343 3344/// ParseLogical 3345/// ::= ArithmeticOps TypeAndValue ',' Value { 3346bool LLParser::ParseLogical(Instruction *&Inst, PerFunctionState &PFS, 3347 unsigned Opc) { 3348 LocTy Loc; Value *LHS, *RHS; 3349 if (ParseTypeAndValue(LHS, Loc, PFS) || 3350 ParseToken(lltok::comma, "expected ',' in logical operation") || 3351 ParseValue(LHS->getType(), RHS, PFS)) 3352 return true; 3353 3354 if (!LHS->getType()->isIntOrIntVectorTy()) 3355 return Error(Loc,"instruction requires integer or integer vector operands"); 3356 3357 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3358 return false; 3359} 3360 3361 3362/// ParseCompare 3363/// ::= 'icmp' IPredicates TypeAndValue ',' Value 3364/// ::= 'fcmp' FPredicates TypeAndValue ',' Value 3365bool LLParser::ParseCompare(Instruction *&Inst, PerFunctionState &PFS, 3366 unsigned Opc) { 3367 // Parse the integer/fp comparison predicate. 3368 LocTy Loc; 3369 unsigned Pred; 3370 Value *LHS, *RHS; 3371 if (ParseCmpPredicate(Pred, Opc) || 3372 ParseTypeAndValue(LHS, Loc, PFS) || 3373 ParseToken(lltok::comma, "expected ',' after compare value") || 3374 ParseValue(LHS->getType(), RHS, PFS)) 3375 return true; 3376 3377 if (Opc == Instruction::FCmp) { 3378 if (!LHS->getType()->isFPOrFPVectorTy()) 3379 return Error(Loc, "fcmp requires floating point operands"); 3380 Inst = new FCmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3381 } else { 3382 assert(Opc == Instruction::ICmp && "Unknown opcode for CmpInst!"); 3383 if (!LHS->getType()->isIntOrIntVectorTy() && 3384 !LHS->getType()->getScalarType()->isPointerTy()) 3385 return Error(Loc, "icmp requires integer operands"); 3386 Inst = new ICmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3387 } 3388 return false; 3389} 3390 3391//===----------------------------------------------------------------------===// 3392// Other Instructions. 3393//===----------------------------------------------------------------------===// 3394 3395 3396/// ParseCast 3397/// ::= CastOpc TypeAndValue 'to' Type 3398bool LLParser::ParseCast(Instruction *&Inst, PerFunctionState &PFS, 3399 unsigned Opc) { 3400 LocTy Loc; 3401 Value *Op; 3402 Type *DestTy = 0; 3403 if (ParseTypeAndValue(Op, Loc, PFS) || 3404 ParseToken(lltok::kw_to, "expected 'to' after cast value") || 3405 ParseType(DestTy)) 3406 return true; 3407 3408 if (!CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy)) { 3409 CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy); 3410 return Error(Loc, "invalid cast opcode for cast from '" + 3411 getTypeString(Op->getType()) + "' to '" + 3412 getTypeString(DestTy) + "'"); 3413 } 3414 Inst = CastInst::Create((Instruction::CastOps)Opc, Op, DestTy); 3415 return false; 3416} 3417 3418/// ParseSelect 3419/// ::= 'select' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3420bool LLParser::ParseSelect(Instruction *&Inst, PerFunctionState &PFS) { 3421 LocTy Loc; 3422 Value *Op0, *Op1, *Op2; 3423 if (ParseTypeAndValue(Op0, Loc, PFS) || 3424 ParseToken(lltok::comma, "expected ',' after select condition") || 3425 ParseTypeAndValue(Op1, PFS) || 3426 ParseToken(lltok::comma, "expected ',' after select value") || 3427 ParseTypeAndValue(Op2, PFS)) 3428 return true; 3429 3430 if (const char *Reason = SelectInst::areInvalidOperands(Op0, Op1, Op2)) 3431 return Error(Loc, Reason); 3432 3433 Inst = SelectInst::Create(Op0, Op1, Op2); 3434 return false; 3435} 3436 3437/// ParseVA_Arg 3438/// ::= 'va_arg' TypeAndValue ',' Type 3439bool LLParser::ParseVA_Arg(Instruction *&Inst, PerFunctionState &PFS) { 3440 Value *Op; 3441 Type *EltTy = 0; 3442 LocTy TypeLoc; 3443 if (ParseTypeAndValue(Op, PFS) || 3444 ParseToken(lltok::comma, "expected ',' after vaarg operand") || 3445 ParseType(EltTy, TypeLoc)) 3446 return true; 3447 3448 if (!EltTy->isFirstClassType()) 3449 return Error(TypeLoc, "va_arg requires operand with first class type"); 3450 3451 Inst = new VAArgInst(Op, EltTy); 3452 return false; 3453} 3454 3455/// ParseExtractElement 3456/// ::= 'extractelement' TypeAndValue ',' TypeAndValue 3457bool LLParser::ParseExtractElement(Instruction *&Inst, PerFunctionState &PFS) { 3458 LocTy Loc; 3459 Value *Op0, *Op1; 3460 if (ParseTypeAndValue(Op0, Loc, PFS) || 3461 ParseToken(lltok::comma, "expected ',' after extract value") || 3462 ParseTypeAndValue(Op1, PFS)) 3463 return true; 3464 3465 if (!ExtractElementInst::isValidOperands(Op0, Op1)) 3466 return Error(Loc, "invalid extractelement operands"); 3467 3468 Inst = ExtractElementInst::Create(Op0, Op1); 3469 return false; 3470} 3471 3472/// ParseInsertElement 3473/// ::= 'insertelement' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3474bool LLParser::ParseInsertElement(Instruction *&Inst, PerFunctionState &PFS) { 3475 LocTy Loc; 3476 Value *Op0, *Op1, *Op2; 3477 if (ParseTypeAndValue(Op0, Loc, PFS) || 3478 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3479 ParseTypeAndValue(Op1, PFS) || 3480 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3481 ParseTypeAndValue(Op2, PFS)) 3482 return true; 3483 3484 if (!InsertElementInst::isValidOperands(Op0, Op1, Op2)) 3485 return Error(Loc, "invalid insertelement operands"); 3486 3487 Inst = InsertElementInst::Create(Op0, Op1, Op2); 3488 return false; 3489} 3490 3491/// ParseShuffleVector 3492/// ::= 'shufflevector' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3493bool LLParser::ParseShuffleVector(Instruction *&Inst, PerFunctionState &PFS) { 3494 LocTy Loc; 3495 Value *Op0, *Op1, *Op2; 3496 if (ParseTypeAndValue(Op0, Loc, PFS) || 3497 ParseToken(lltok::comma, "expected ',' after shuffle mask") || 3498 ParseTypeAndValue(Op1, PFS) || 3499 ParseToken(lltok::comma, "expected ',' after shuffle value") || 3500 ParseTypeAndValue(Op2, PFS)) 3501 return true; 3502 3503 if (!ShuffleVectorInst::isValidOperands(Op0, Op1, Op2)) 3504 return Error(Loc, "invalid shufflevector operands"); 3505 3506 Inst = new ShuffleVectorInst(Op0, Op1, Op2); 3507 return false; 3508} 3509 3510/// ParsePHI 3511/// ::= 'phi' Type '[' Value ',' Value ']' (',' '[' Value ',' Value ']')* 3512int LLParser::ParsePHI(Instruction *&Inst, PerFunctionState &PFS) { 3513 Type *Ty = 0; LocTy TypeLoc; 3514 Value *Op0, *Op1; 3515 3516 if (ParseType(Ty, TypeLoc) || 3517 ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3518 ParseValue(Ty, Op0, PFS) || 3519 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3520 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3521 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3522 return true; 3523 3524 bool AteExtraComma = false; 3525 SmallVector<std::pair<Value*, BasicBlock*>, 16> PHIVals; 3526 while (1) { 3527 PHIVals.push_back(std::make_pair(Op0, cast<BasicBlock>(Op1))); 3528 3529 if (!EatIfPresent(lltok::comma)) 3530 break; 3531 3532 if (Lex.getKind() == lltok::MetadataVar) { 3533 AteExtraComma = true; 3534 break; 3535 } 3536 3537 if (ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3538 ParseValue(Ty, Op0, PFS) || 3539 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3540 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3541 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3542 return true; 3543 } 3544 3545 if (!Ty->isFirstClassType()) 3546 return Error(TypeLoc, "phi node must have first class type"); 3547 3548 PHINode *PN = PHINode::Create(Ty, PHIVals.size()); 3549 for (unsigned i = 0, e = PHIVals.size(); i != e; ++i) 3550 PN->addIncoming(PHIVals[i].first, PHIVals[i].second); 3551 Inst = PN; 3552 return AteExtraComma ? InstExtraComma : InstNormal; 3553} 3554 3555/// ParseLandingPad 3556/// ::= 'landingpad' Type 'personality' TypeAndValue 'cleanup'? Clause+ 3557/// Clause 3558/// ::= 'catch' TypeAndValue 3559/// ::= 'filter' 3560/// ::= 'filter' TypeAndValue ( ',' TypeAndValue )* 3561bool LLParser::ParseLandingPad(Instruction *&Inst, PerFunctionState &PFS) { 3562 Type *Ty = 0; LocTy TyLoc; 3563 Value *PersFn; LocTy PersFnLoc; 3564 3565 if (ParseType(Ty, TyLoc) || 3566 ParseToken(lltok::kw_personality, "expected 'personality'") || 3567 ParseTypeAndValue(PersFn, PersFnLoc, PFS)) 3568 return true; 3569 3570 LandingPadInst *LP = LandingPadInst::Create(Ty, PersFn, 0); 3571 LP->setCleanup(EatIfPresent(lltok::kw_cleanup)); 3572 3573 while (Lex.getKind() == lltok::kw_catch || Lex.getKind() == lltok::kw_filter){ 3574 LandingPadInst::ClauseType CT; 3575 if (EatIfPresent(lltok::kw_catch)) 3576 CT = LandingPadInst::Catch; 3577 else if (EatIfPresent(lltok::kw_filter)) 3578 CT = LandingPadInst::Filter; 3579 else 3580 return TokError("expected 'catch' or 'filter' clause type"); 3581 3582 Value *V; LocTy VLoc; 3583 if (ParseTypeAndValue(V, VLoc, PFS)) { 3584 delete LP; 3585 return true; 3586 } 3587 3588 // A 'catch' type expects a non-array constant. A filter clause expects an 3589 // array constant. 3590 if (CT == LandingPadInst::Catch) { 3591 if (isa<ArrayType>(V->getType())) 3592 Error(VLoc, "'catch' clause has an invalid type"); 3593 } else { 3594 if (!isa<ArrayType>(V->getType())) 3595 Error(VLoc, "'filter' clause has an invalid type"); 3596 } 3597 3598 LP->addClause(V); 3599 } 3600 3601 Inst = LP; 3602 return false; 3603} 3604 3605/// ParseCall 3606/// ::= 'tail'? 'call' OptionalCallingConv OptionalAttrs Type Value 3607/// ParameterList OptionalAttrs 3608bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS, 3609 bool isTail) { 3610 Attributes RetAttrs, FnAttrs; 3611 CallingConv::ID CC; 3612 Type *RetType = 0; 3613 LocTy RetTypeLoc; 3614 ValID CalleeID; 3615 SmallVector<ParamInfo, 16> ArgList; 3616 LocTy CallLoc = Lex.getLoc(); 3617 3618 if ((isTail && ParseToken(lltok::kw_call, "expected 'tail call'")) || 3619 ParseOptionalCallingConv(CC) || 3620 ParseOptionalAttrs(RetAttrs, 1) || 3621 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3622 ParseValID(CalleeID) || 3623 ParseParameterList(ArgList, PFS) || 3624 ParseOptionalAttrs(FnAttrs, 2)) 3625 return true; 3626 3627 // If RetType is a non-function pointer type, then this is the short syntax 3628 // for the call, which means that RetType is just the return type. Infer the 3629 // rest of the function argument types from the arguments that are present. 3630 PointerType *PFTy = 0; 3631 FunctionType *Ty = 0; 3632 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3633 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3634 // Pull out the types of all of the arguments... 3635 std::vector<Type*> ParamTypes; 3636 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3637 ParamTypes.push_back(ArgList[i].V->getType()); 3638 3639 if (!FunctionType::isValidReturnType(RetType)) 3640 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3641 3642 Ty = FunctionType::get(RetType, ParamTypes, false); 3643 PFTy = PointerType::getUnqual(Ty); 3644 } 3645 3646 // Look up the callee. 3647 Value *Callee; 3648 if (ConvertValIDToValue(PFTy, CalleeID, Callee, &PFS)) return true; 3649 3650 // Set up the Attributes for the function. 3651 SmallVector<AttributeWithIndex, 8> Attrs; 3652 if (RetAttrs != Attribute::None) 3653 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3654 3655 SmallVector<Value*, 8> Args; 3656 3657 // Loop through FunctionType's arguments and ensure they are specified 3658 // correctly. Also, gather any parameter attributes. 3659 FunctionType::param_iterator I = Ty->param_begin(); 3660 FunctionType::param_iterator E = Ty->param_end(); 3661 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3662 Type *ExpectedTy = 0; 3663 if (I != E) { 3664 ExpectedTy = *I++; 3665 } else if (!Ty->isVarArg()) { 3666 return Error(ArgList[i].Loc, "too many arguments specified"); 3667 } 3668 3669 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3670 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3671 getTypeString(ExpectedTy) + "'"); 3672 Args.push_back(ArgList[i].V); 3673 if (ArgList[i].Attrs != Attribute::None) 3674 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3675 } 3676 3677 if (I != E) 3678 return Error(CallLoc, "not enough parameters specified for call"); 3679 3680 if (FnAttrs != Attribute::None) 3681 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3682 3683 // Finish off the Attributes and check them 3684 AttrListPtr PAL = AttrListPtr::get(Attrs); 3685 3686 CallInst *CI = CallInst::Create(Callee, Args); 3687 CI->setTailCall(isTail); 3688 CI->setCallingConv(CC); 3689 CI->setAttributes(PAL); 3690 Inst = CI; 3691 return false; 3692} 3693 3694//===----------------------------------------------------------------------===// 3695// Memory Instructions. 3696//===----------------------------------------------------------------------===// 3697 3698/// ParseAlloc 3699/// ::= 'alloca' Type (',' TypeAndValue)? (',' OptionalInfo)? 3700int LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS) { 3701 Value *Size = 0; 3702 LocTy SizeLoc; 3703 unsigned Alignment = 0; 3704 Type *Ty = 0; 3705 if (ParseType(Ty)) return true; 3706 3707 bool AteExtraComma = false; 3708 if (EatIfPresent(lltok::comma)) { 3709 if (Lex.getKind() == lltok::kw_align) { 3710 if (ParseOptionalAlignment(Alignment)) return true; 3711 } else if (Lex.getKind() == lltok::MetadataVar) { 3712 AteExtraComma = true; 3713 } else { 3714 if (ParseTypeAndValue(Size, SizeLoc, PFS) || 3715 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3716 return true; 3717 } 3718 } 3719 3720 if (Size && !Size->getType()->isIntegerTy()) 3721 return Error(SizeLoc, "element count must have integer type"); 3722 3723 Inst = new AllocaInst(Ty, Size, Alignment); 3724 return AteExtraComma ? InstExtraComma : InstNormal; 3725} 3726 3727/// ParseLoad 3728/// ::= 'load' 'volatile'? TypeAndValue (',' 'align' i32)? 3729/// ::= 'load' 'atomic' 'volatile'? TypeAndValue 3730/// 'singlethread'? AtomicOrdering (',' 'align' i32)? 3731int LLParser::ParseLoad(Instruction *&Inst, PerFunctionState &PFS) { 3732 Value *Val; LocTy Loc; 3733 unsigned Alignment = 0; 3734 bool AteExtraComma = false; 3735 bool isAtomic = false; 3736 AtomicOrdering Ordering = NotAtomic; 3737 SynchronizationScope Scope = CrossThread; 3738 3739 if (Lex.getKind() == lltok::kw_atomic) { 3740 isAtomic = true; 3741 Lex.Lex(); 3742 } 3743 3744 bool isVolatile = false; 3745 if (Lex.getKind() == lltok::kw_volatile) { 3746 isVolatile = true; 3747 Lex.Lex(); 3748 } 3749 3750 if (ParseTypeAndValue(Val, Loc, PFS) || 3751 ParseScopeAndOrdering(isAtomic, Scope, Ordering) || 3752 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3753 return true; 3754 3755 if (!Val->getType()->isPointerTy() || 3756 !cast<PointerType>(Val->getType())->getElementType()->isFirstClassType()) 3757 return Error(Loc, "load operand must be a pointer to a first class type"); 3758 if (isAtomic && !Alignment) 3759 return Error(Loc, "atomic load must have explicit non-zero alignment"); 3760 if (Ordering == Release || Ordering == AcquireRelease) 3761 return Error(Loc, "atomic load cannot use Release ordering"); 3762 3763 Inst = new LoadInst(Val, "", isVolatile, Alignment, Ordering, Scope); 3764 return AteExtraComma ? InstExtraComma : InstNormal; 3765} 3766 3767/// ParseStore 3768 3769/// ::= 'store' 'volatile'? TypeAndValue ',' TypeAndValue (',' 'align' i32)? 3770/// ::= 'store' 'atomic' 'volatile'? TypeAndValue ',' TypeAndValue 3771/// 'singlethread'? AtomicOrdering (',' 'align' i32)? 3772int LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS) { 3773 Value *Val, *Ptr; LocTy Loc, PtrLoc; 3774 unsigned Alignment = 0; 3775 bool AteExtraComma = false; 3776 bool isAtomic = false; 3777 AtomicOrdering Ordering = NotAtomic; 3778 SynchronizationScope Scope = CrossThread; 3779 3780 if (Lex.getKind() == lltok::kw_atomic) { 3781 isAtomic = true; 3782 Lex.Lex(); 3783 } 3784 3785 bool isVolatile = false; 3786 if (Lex.getKind() == lltok::kw_volatile) { 3787 isVolatile = true; 3788 Lex.Lex(); 3789 } 3790 3791 if (ParseTypeAndValue(Val, Loc, PFS) || 3792 ParseToken(lltok::comma, "expected ',' after store operand") || 3793 ParseTypeAndValue(Ptr, PtrLoc, PFS) || 3794 ParseScopeAndOrdering(isAtomic, Scope, Ordering) || 3795 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3796 return true; 3797 3798 if (!Ptr->getType()->isPointerTy()) 3799 return Error(PtrLoc, "store operand must be a pointer"); 3800 if (!Val->getType()->isFirstClassType()) 3801 return Error(Loc, "store operand must be a first class value"); 3802 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType()) 3803 return Error(Loc, "stored value and pointer type do not match"); 3804 if (isAtomic && !Alignment) 3805 return Error(Loc, "atomic store must have explicit non-zero alignment"); 3806 if (Ordering == Acquire || Ordering == AcquireRelease) 3807 return Error(Loc, "atomic store cannot use Acquire ordering"); 3808 3809 Inst = new StoreInst(Val, Ptr, isVolatile, Alignment, Ordering, Scope); 3810 return AteExtraComma ? InstExtraComma : InstNormal; 3811} 3812 3813/// ParseCmpXchg 3814/// ::= 'cmpxchg' 'volatile'? TypeAndValue ',' TypeAndValue ',' TypeAndValue 3815/// 'singlethread'? AtomicOrdering 3816int LLParser::ParseCmpXchg(Instruction *&Inst, PerFunctionState &PFS) { 3817 Value *Ptr, *Cmp, *New; LocTy PtrLoc, CmpLoc, NewLoc; 3818 bool AteExtraComma = false; 3819 AtomicOrdering Ordering = NotAtomic; 3820 SynchronizationScope Scope = CrossThread; 3821 bool isVolatile = false; 3822 3823 if (EatIfPresent(lltok::kw_volatile)) 3824 isVolatile = true; 3825 3826 if (ParseTypeAndValue(Ptr, PtrLoc, PFS) || 3827 ParseToken(lltok::comma, "expected ',' after cmpxchg address") || 3828 ParseTypeAndValue(Cmp, CmpLoc, PFS) || 3829 ParseToken(lltok::comma, "expected ',' after cmpxchg cmp operand") || 3830 ParseTypeAndValue(New, NewLoc, PFS) || 3831 ParseScopeAndOrdering(true /*Always atomic*/, Scope, Ordering)) 3832 return true; 3833 3834 if (Ordering == Unordered) 3835 return TokError("cmpxchg cannot be unordered"); 3836 if (!Ptr->getType()->isPointerTy()) 3837 return Error(PtrLoc, "cmpxchg operand must be a pointer"); 3838 if (cast<PointerType>(Ptr->getType())->getElementType() != Cmp->getType()) 3839 return Error(CmpLoc, "compare value and pointer type do not match"); 3840 if (cast<PointerType>(Ptr->getType())->getElementType() != New->getType()) 3841 return Error(NewLoc, "new value and pointer type do not match"); 3842 if (!New->getType()->isIntegerTy()) 3843 return Error(NewLoc, "cmpxchg operand must be an integer"); 3844 unsigned Size = New->getType()->getPrimitiveSizeInBits(); 3845 if (Size < 8 || (Size & (Size - 1))) 3846 return Error(NewLoc, "cmpxchg operand must be power-of-two byte-sized" 3847 " integer"); 3848 3849 AtomicCmpXchgInst *CXI = 3850 new AtomicCmpXchgInst(Ptr, Cmp, New, Ordering, Scope); 3851 CXI->setVolatile(isVolatile); 3852 Inst = CXI; 3853 return AteExtraComma ? InstExtraComma : InstNormal; 3854} 3855 3856/// ParseAtomicRMW 3857/// ::= 'atomicrmw' 'volatile'? BinOp TypeAndValue ',' TypeAndValue 3858/// 'singlethread'? AtomicOrdering 3859int LLParser::ParseAtomicRMW(Instruction *&Inst, PerFunctionState &PFS) { 3860 Value *Ptr, *Val; LocTy PtrLoc, ValLoc; 3861 bool AteExtraComma = false; 3862 AtomicOrdering Ordering = NotAtomic; 3863 SynchronizationScope Scope = CrossThread; 3864 bool isVolatile = false; 3865 AtomicRMWInst::BinOp Operation; 3866 3867 if (EatIfPresent(lltok::kw_volatile)) 3868 isVolatile = true; 3869 3870 switch (Lex.getKind()) { 3871 default: return TokError("expected binary operation in atomicrmw"); 3872 case lltok::kw_xchg: Operation = AtomicRMWInst::Xchg; break; 3873 case lltok::kw_add: Operation = AtomicRMWInst::Add; break; 3874 case lltok::kw_sub: Operation = AtomicRMWInst::Sub; break; 3875 case lltok::kw_and: Operation = AtomicRMWInst::And; break; 3876 case lltok::kw_nand: Operation = AtomicRMWInst::Nand; break; 3877 case lltok::kw_or: Operation = AtomicRMWInst::Or; break; 3878 case lltok::kw_xor: Operation = AtomicRMWInst::Xor; break; 3879 case lltok::kw_max: Operation = AtomicRMWInst::Max; break; 3880 case lltok::kw_min: Operation = AtomicRMWInst::Min; break; 3881 case lltok::kw_umax: Operation = AtomicRMWInst::UMax; break; 3882 case lltok::kw_umin: Operation = AtomicRMWInst::UMin; break; 3883 } 3884 Lex.Lex(); // Eat the operation. 3885 3886 if (ParseTypeAndValue(Ptr, PtrLoc, PFS) || 3887 ParseToken(lltok::comma, "expected ',' after atomicrmw address") || 3888 ParseTypeAndValue(Val, ValLoc, PFS) || 3889 ParseScopeAndOrdering(true /*Always atomic*/, Scope, Ordering)) 3890 return true; 3891 3892 if (Ordering == Unordered) 3893 return TokError("atomicrmw cannot be unordered"); 3894 if (!Ptr->getType()->isPointerTy()) 3895 return Error(PtrLoc, "atomicrmw operand must be a pointer"); 3896 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType()) 3897 return Error(ValLoc, "atomicrmw value and pointer type do not match"); 3898 if (!Val->getType()->isIntegerTy()) 3899 return Error(ValLoc, "atomicrmw operand must be an integer"); 3900 unsigned Size = Val->getType()->getPrimitiveSizeInBits(); 3901 if (Size < 8 || (Size & (Size - 1))) 3902 return Error(ValLoc, "atomicrmw operand must be power-of-two byte-sized" 3903 " integer"); 3904 3905 AtomicRMWInst *RMWI = 3906 new AtomicRMWInst(Operation, Ptr, Val, Ordering, Scope); 3907 RMWI->setVolatile(isVolatile); 3908 Inst = RMWI; 3909 return AteExtraComma ? InstExtraComma : InstNormal; 3910} 3911 3912/// ParseFence 3913/// ::= 'fence' 'singlethread'? AtomicOrdering 3914int LLParser::ParseFence(Instruction *&Inst, PerFunctionState &PFS) { 3915 AtomicOrdering Ordering = NotAtomic; 3916 SynchronizationScope Scope = CrossThread; 3917 if (ParseScopeAndOrdering(true /*Always atomic*/, Scope, Ordering)) 3918 return true; 3919 3920 if (Ordering == Unordered) 3921 return TokError("fence cannot be unordered"); 3922 if (Ordering == Monotonic) 3923 return TokError("fence cannot be monotonic"); 3924 3925 Inst = new FenceInst(Context, Ordering, Scope); 3926 return InstNormal; 3927} 3928 3929/// ParseGetElementPtr 3930/// ::= 'getelementptr' 'inbounds'? TypeAndValue (',' TypeAndValue)* 3931int LLParser::ParseGetElementPtr(Instruction *&Inst, PerFunctionState &PFS) { 3932 Value *Ptr = 0; 3933 Value *Val = 0; 3934 LocTy Loc, EltLoc; 3935 3936 bool InBounds = EatIfPresent(lltok::kw_inbounds); 3937 3938 if (ParseTypeAndValue(Ptr, Loc, PFS)) return true; 3939 3940 if (!Ptr->getType()->getScalarType()->isPointerTy()) 3941 return Error(Loc, "base of getelementptr must be a pointer"); 3942 3943 SmallVector<Value*, 16> Indices; 3944 bool AteExtraComma = false; 3945 while (EatIfPresent(lltok::comma)) { 3946 if (Lex.getKind() == lltok::MetadataVar) { 3947 AteExtraComma = true; 3948 break; 3949 } 3950 if (ParseTypeAndValue(Val, EltLoc, PFS)) return true; 3951 if (!Val->getType()->getScalarType()->isIntegerTy()) 3952 return Error(EltLoc, "getelementptr index must be an integer"); 3953 if (Val->getType()->isVectorTy() != Ptr->getType()->isVectorTy()) 3954 return Error(EltLoc, "getelementptr index type missmatch"); 3955 if (Val->getType()->isVectorTy()) { 3956 unsigned ValNumEl = cast<VectorType>(Val->getType())->getNumElements(); 3957 unsigned PtrNumEl = cast<VectorType>(Ptr->getType())->getNumElements(); 3958 if (ValNumEl != PtrNumEl) 3959 return Error(EltLoc, 3960 "getelementptr vector index has a wrong number of elements"); 3961 } 3962 Indices.push_back(Val); 3963 } 3964 3965 if (Val && Val->getType()->isVectorTy() && Indices.size() != 1) 3966 return Error(EltLoc, "vector getelementptrs must have a single index"); 3967 3968 if (!GetElementPtrInst::getIndexedType(Ptr->getType(), Indices)) 3969 return Error(Loc, "invalid getelementptr indices"); 3970 Inst = GetElementPtrInst::Create(Ptr, Indices); 3971 if (InBounds) 3972 cast<GetElementPtrInst>(Inst)->setIsInBounds(true); 3973 return AteExtraComma ? InstExtraComma : InstNormal; 3974} 3975 3976/// ParseExtractValue 3977/// ::= 'extractvalue' TypeAndValue (',' uint32)+ 3978int LLParser::ParseExtractValue(Instruction *&Inst, PerFunctionState &PFS) { 3979 Value *Val; LocTy Loc; 3980 SmallVector<unsigned, 4> Indices; 3981 bool AteExtraComma; 3982 if (ParseTypeAndValue(Val, Loc, PFS) || 3983 ParseIndexList(Indices, AteExtraComma)) 3984 return true; 3985 3986 if (!Val->getType()->isAggregateType()) 3987 return Error(Loc, "extractvalue operand must be aggregate type"); 3988 3989 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices)) 3990 return Error(Loc, "invalid indices for extractvalue"); 3991 Inst = ExtractValueInst::Create(Val, Indices); 3992 return AteExtraComma ? InstExtraComma : InstNormal; 3993} 3994 3995/// ParseInsertValue 3996/// ::= 'insertvalue' TypeAndValue ',' TypeAndValue (',' uint32)+ 3997int LLParser::ParseInsertValue(Instruction *&Inst, PerFunctionState &PFS) { 3998 Value *Val0, *Val1; LocTy Loc0, Loc1; 3999 SmallVector<unsigned, 4> Indices; 4000 bool AteExtraComma; 4001 if (ParseTypeAndValue(Val0, Loc0, PFS) || 4002 ParseToken(lltok::comma, "expected comma after insertvalue operand") || 4003 ParseTypeAndValue(Val1, Loc1, PFS) || 4004 ParseIndexList(Indices, AteExtraComma)) 4005 return true; 4006 4007 if (!Val0->getType()->isAggregateType()) 4008 return Error(Loc0, "insertvalue operand must be aggregate type"); 4009 4010 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices)) 4011 return Error(Loc0, "invalid indices for insertvalue"); 4012 Inst = InsertValueInst::Create(Val0, Val1, Indices); 4013 return AteExtraComma ? InstExtraComma : InstNormal; 4014} 4015 4016//===----------------------------------------------------------------------===// 4017// Embedded metadata. 4018//===----------------------------------------------------------------------===// 4019 4020/// ParseMDNodeVector 4021/// ::= Element (',' Element)* 4022/// Element 4023/// ::= 'null' | TypeAndValue 4024bool LLParser::ParseMDNodeVector(SmallVectorImpl<Value*> &Elts, 4025 PerFunctionState *PFS) { 4026 // Check for an empty list. 4027 if (Lex.getKind() == lltok::rbrace) 4028 return false; 4029 4030 do { 4031 // Null is a special case since it is typeless. 4032 if (EatIfPresent(lltok::kw_null)) { 4033 Elts.push_back(0); 4034 continue; 4035 } 4036 4037 Value *V = 0; 4038 if (ParseTypeAndValue(V, PFS)) return true; 4039 Elts.push_back(V); 4040 } while (EatIfPresent(lltok::comma)); 4041 4042 return false; 4043} 4044