LLParser.cpp revision 267010864e139781ef5949939e081c41f954de0a
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(const 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 93 if (!ForwardRefTypes.empty()) 94 return Error(ForwardRefTypes.begin()->second.second, 95 "use of undefined type named '" + 96 ForwardRefTypes.begin()->first + "'"); 97 if (!ForwardRefTypeIDs.empty()) 98 return Error(ForwardRefTypeIDs.begin()->second.second, 99 "use of undefined type '%" + 100 Twine(ForwardRefTypeIDs.begin()->first) + "'"); 101 102 if (!ForwardRefVals.empty()) 103 return Error(ForwardRefVals.begin()->second.second, 104 "use of undefined value '@" + ForwardRefVals.begin()->first + 105 "'"); 106 107 if (!ForwardRefValIDs.empty()) 108 return Error(ForwardRefValIDs.begin()->second.second, 109 "use of undefined value '@" + 110 Twine(ForwardRefValIDs.begin()->first) + "'"); 111 112 if (!ForwardRefMDNodes.empty()) 113 return Error(ForwardRefMDNodes.begin()->second.second, 114 "use of undefined metadata '!" + 115 Twine(ForwardRefMDNodes.begin()->first) + "'"); 116 117 118 // Look for intrinsic functions and CallInst that need to be upgraded 119 for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ) 120 UpgradeCallsToIntrinsic(FI++); // must be post-increment, as we remove 121 122 // Check debug info intrinsics. 123 CheckDebugInfoIntrinsics(M); 124 return false; 125} 126 127bool LLParser::ResolveForwardRefBlockAddresses(Function *TheFn, 128 std::vector<std::pair<ValID, GlobalValue*> > &Refs, 129 PerFunctionState *PFS) { 130 // Loop over all the references, resolving them. 131 for (unsigned i = 0, e = Refs.size(); i != e; ++i) { 132 BasicBlock *Res; 133 if (PFS) { 134 if (Refs[i].first.Kind == ValID::t_LocalName) 135 Res = PFS->GetBB(Refs[i].first.StrVal, Refs[i].first.Loc); 136 else 137 Res = PFS->GetBB(Refs[i].first.UIntVal, Refs[i].first.Loc); 138 } else if (Refs[i].first.Kind == ValID::t_LocalID) { 139 return Error(Refs[i].first.Loc, 140 "cannot take address of numeric label after the function is defined"); 141 } else { 142 Res = dyn_cast_or_null<BasicBlock>( 143 TheFn->getValueSymbolTable().lookup(Refs[i].first.StrVal)); 144 } 145 146 if (Res == 0) 147 return Error(Refs[i].first.Loc, 148 "referenced value is not a basic block"); 149 150 // Get the BlockAddress for this and update references to use it. 151 BlockAddress *BA = BlockAddress::get(TheFn, Res); 152 Refs[i].second->replaceAllUsesWith(BA); 153 Refs[i].second->eraseFromParent(); 154 } 155 return false; 156} 157 158 159//===----------------------------------------------------------------------===// 160// Top-Level Entities 161//===----------------------------------------------------------------------===// 162 163bool LLParser::ParseTopLevelEntities() { 164 while (1) { 165 switch (Lex.getKind()) { 166 default: return TokError("expected top-level entity"); 167 case lltok::Eof: return false; 168 case lltok::kw_declare: if (ParseDeclare()) return true; break; 169 case lltok::kw_define: if (ParseDefine()) return true; break; 170 case lltok::kw_module: if (ParseModuleAsm()) return true; break; 171 case lltok::kw_target: if (ParseTargetDefinition()) return true; break; 172 case lltok::kw_deplibs: if (ParseDepLibs()) return true; break; 173 case lltok::LocalVarID: if (ParseUnnamedType()) return true; break; 174 case lltok::LocalVar: if (ParseNamedType()) return true; break; 175 case lltok::GlobalID: if (ParseUnnamedGlobal()) return true; break; 176 case lltok::GlobalVar: if (ParseNamedGlobal()) return true; break; 177 case lltok::exclaim: if (ParseStandaloneMetadata()) return true; break; 178 case lltok::MetadataVar: if (ParseNamedMetadata()) return true; break; 179 180 // The Global variable production with no name can have many different 181 // optional leading prefixes, the production is: 182 // GlobalVar ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 183 // OptionalAddrSpace OptionalUnNammedAddr 184 // ('constant'|'global') ... 185 case lltok::kw_private: // OptionalLinkage 186 case lltok::kw_linker_private: // OptionalLinkage 187 case lltok::kw_linker_private_weak: // OptionalLinkage 188 case lltok::kw_linker_private_weak_def_auto: // OptionalLinkage 189 case lltok::kw_internal: // OptionalLinkage 190 case lltok::kw_weak: // OptionalLinkage 191 case lltok::kw_weak_odr: // OptionalLinkage 192 case lltok::kw_linkonce: // OptionalLinkage 193 case lltok::kw_linkonce_odr: // 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 = NumberedTypes.size(); 297 if (Lex.getUIntVal() != TypeID) 298 return Error(Lex.getLoc(), "type expected to be numbered '%" + 299 Twine(TypeID) + "'"); 300 Lex.Lex(); // eat LocalVarID; 301 302 if (ParseToken(lltok::equal, "expected '=' after name") || 303 ParseToken(lltok::kw_type, "expected 'type' after '='")) 304 return true; 305 306 PATypeHolder Ty(Type::getVoidTy(Context)); 307 if (ParseType(Ty)) return true; 308 309 // See if this type was previously referenced. 310 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 311 FI = ForwardRefTypeIDs.find(TypeID); 312 if (FI != ForwardRefTypeIDs.end()) { 313 if (FI->second.first.get() == Ty) 314 return Error(TypeLoc, "self referential type is invalid"); 315 316 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 317 Ty = FI->second.first.get(); 318 ForwardRefTypeIDs.erase(FI); 319 } 320 321 NumberedTypes.push_back(Ty); 322 323 return false; 324} 325 326/// toplevelentity 327/// ::= LocalVar '=' 'type' type 328bool LLParser::ParseNamedType() { 329 std::string Name = Lex.getStrVal(); 330 LocTy NameLoc = Lex.getLoc(); 331 Lex.Lex(); // eat LocalVar. 332 333 PATypeHolder Ty(Type::getVoidTy(Context)); 334 335 if (ParseToken(lltok::equal, "expected '=' after name") || 336 ParseToken(lltok::kw_type, "expected 'type' after name") || 337 ParseType(Ty)) 338 return true; 339 340 // Set the type name, checking for conflicts as we do so. 341 bool AlreadyExists = M->addTypeName(Name, Ty); 342 if (!AlreadyExists) return false; 343 344 // See if this type is a forward reference. We need to eagerly resolve 345 // types to allow recursive type redefinitions below. 346 std::map<std::string, std::pair<PATypeHolder, LocTy> >::iterator 347 FI = ForwardRefTypes.find(Name); 348 if (FI != ForwardRefTypes.end()) { 349 if (FI->second.first.get() == Ty) 350 return Error(NameLoc, "self referential type is invalid"); 351 352 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 353 Ty = FI->second.first.get(); 354 ForwardRefTypes.erase(FI); 355 return false; 356 } 357 358 // Inserting a name that is already defined, get the existing name. 359 assert(M->getTypeByName(Name) && "Conflict but no matching type?!"); 360 361 // Otherwise, this is an attempt to redefine a type, report the error. 362 return Error(NameLoc, "redefinition of type named '" + Name + "' of type '" + 363 getTypeString(Ty) + "'"); 364} 365 366 367/// toplevelentity 368/// ::= 'declare' FunctionHeader 369bool LLParser::ParseDeclare() { 370 assert(Lex.getKind() == lltok::kw_declare); 371 Lex.Lex(); 372 373 Function *F; 374 return ParseFunctionHeader(F, false); 375} 376 377/// toplevelentity 378/// ::= 'define' FunctionHeader '{' ... 379bool LLParser::ParseDefine() { 380 assert(Lex.getKind() == lltok::kw_define); 381 Lex.Lex(); 382 383 Function *F; 384 return ParseFunctionHeader(F, true) || 385 ParseFunctionBody(*F); 386} 387 388/// ParseGlobalType 389/// ::= 'constant' 390/// ::= 'global' 391bool LLParser::ParseGlobalType(bool &IsConstant) { 392 if (Lex.getKind() == lltok::kw_constant) 393 IsConstant = true; 394 else if (Lex.getKind() == lltok::kw_global) 395 IsConstant = false; 396 else { 397 IsConstant = false; 398 return TokError("expected 'global' or 'constant'"); 399 } 400 Lex.Lex(); 401 return false; 402} 403 404/// ParseUnnamedGlobal: 405/// OptionalVisibility ALIAS ... 406/// OptionalLinkage OptionalVisibility ... -> global variable 407/// GlobalID '=' OptionalVisibility ALIAS ... 408/// GlobalID '=' OptionalLinkage OptionalVisibility ... -> global variable 409bool LLParser::ParseUnnamedGlobal() { 410 unsigned VarID = NumberedVals.size(); 411 std::string Name; 412 LocTy NameLoc = Lex.getLoc(); 413 414 // Handle the GlobalID form. 415 if (Lex.getKind() == lltok::GlobalID) { 416 if (Lex.getUIntVal() != VarID) 417 return Error(Lex.getLoc(), "variable expected to be numbered '%" + 418 Twine(VarID) + "'"); 419 Lex.Lex(); // eat GlobalID; 420 421 if (ParseToken(lltok::equal, "expected '=' after name")) 422 return true; 423 } 424 425 bool HasLinkage; 426 unsigned Linkage, Visibility; 427 if (ParseOptionalLinkage(Linkage, HasLinkage) || 428 ParseOptionalVisibility(Visibility)) 429 return true; 430 431 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 432 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 433 return ParseAlias(Name, NameLoc, Visibility); 434} 435 436/// ParseNamedGlobal: 437/// GlobalVar '=' OptionalVisibility ALIAS ... 438/// GlobalVar '=' OptionalLinkage OptionalVisibility ... -> global variable 439bool LLParser::ParseNamedGlobal() { 440 assert(Lex.getKind() == lltok::GlobalVar); 441 LocTy NameLoc = Lex.getLoc(); 442 std::string Name = Lex.getStrVal(); 443 Lex.Lex(); 444 445 bool HasLinkage; 446 unsigned Linkage, Visibility; 447 if (ParseToken(lltok::equal, "expected '=' in global variable") || 448 ParseOptionalLinkage(Linkage, HasLinkage) || 449 ParseOptionalVisibility(Visibility)) 450 return true; 451 452 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 453 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 454 return ParseAlias(Name, NameLoc, Visibility); 455} 456 457// MDString: 458// ::= '!' STRINGCONSTANT 459bool LLParser::ParseMDString(MDString *&Result) { 460 std::string Str; 461 if (ParseStringConstant(Str)) return true; 462 Result = MDString::get(Context, Str); 463 return false; 464} 465 466// MDNode: 467// ::= '!' MDNodeNumber 468// 469/// This version of ParseMDNodeID returns the slot number and null in the case 470/// of a forward reference. 471bool LLParser::ParseMDNodeID(MDNode *&Result, unsigned &SlotNo) { 472 // !{ ..., !42, ... } 473 if (ParseUInt32(SlotNo)) return true; 474 475 // Check existing MDNode. 476 if (SlotNo < NumberedMetadata.size() && NumberedMetadata[SlotNo] != 0) 477 Result = NumberedMetadata[SlotNo]; 478 else 479 Result = 0; 480 return false; 481} 482 483bool LLParser::ParseMDNodeID(MDNode *&Result) { 484 // !{ ..., !42, ... } 485 unsigned MID = 0; 486 if (ParseMDNodeID(Result, MID)) return true; 487 488 // If not a forward reference, just return it now. 489 if (Result) return false; 490 491 // Otherwise, create MDNode forward reference. 492 MDNode *FwdNode = MDNode::getTemporary(Context, ArrayRef<Value*>()); 493 ForwardRefMDNodes[MID] = std::make_pair(FwdNode, Lex.getLoc()); 494 495 if (NumberedMetadata.size() <= MID) 496 NumberedMetadata.resize(MID+1); 497 NumberedMetadata[MID] = FwdNode; 498 Result = FwdNode; 499 return false; 500} 501 502/// ParseNamedMetadata: 503/// !foo = !{ !1, !2 } 504bool LLParser::ParseNamedMetadata() { 505 assert(Lex.getKind() == lltok::MetadataVar); 506 std::string Name = Lex.getStrVal(); 507 Lex.Lex(); 508 509 if (ParseToken(lltok::equal, "expected '=' here") || 510 ParseToken(lltok::exclaim, "Expected '!' here") || 511 ParseToken(lltok::lbrace, "Expected '{' here")) 512 return true; 513 514 NamedMDNode *NMD = M->getOrInsertNamedMetadata(Name); 515 if (Lex.getKind() != lltok::rbrace) 516 do { 517 if (ParseToken(lltok::exclaim, "Expected '!' here")) 518 return true; 519 520 MDNode *N = 0; 521 if (ParseMDNodeID(N)) return true; 522 NMD->addOperand(N); 523 } while (EatIfPresent(lltok::comma)); 524 525 if (ParseToken(lltok::rbrace, "expected end of metadata node")) 526 return true; 527 528 return false; 529} 530 531/// ParseStandaloneMetadata: 532/// !42 = !{...} 533bool LLParser::ParseStandaloneMetadata() { 534 assert(Lex.getKind() == lltok::exclaim); 535 Lex.Lex(); 536 unsigned MetadataID = 0; 537 538 LocTy TyLoc; 539 PATypeHolder Ty(Type::getVoidTy(Context)); 540 SmallVector<Value *, 16> Elts; 541 if (ParseUInt32(MetadataID) || 542 ParseToken(lltok::equal, "expected '=' here") || 543 ParseType(Ty, TyLoc) || 544 ParseToken(lltok::exclaim, "Expected '!' here") || 545 ParseToken(lltok::lbrace, "Expected '{' here") || 546 ParseMDNodeVector(Elts, NULL) || 547 ParseToken(lltok::rbrace, "expected end of metadata node")) 548 return true; 549 550 MDNode *Init = MDNode::get(Context, Elts); 551 552 // See if this was forward referenced, if so, handle it. 553 std::map<unsigned, std::pair<TrackingVH<MDNode>, LocTy> >::iterator 554 FI = ForwardRefMDNodes.find(MetadataID); 555 if (FI != ForwardRefMDNodes.end()) { 556 MDNode *Temp = FI->second.first; 557 Temp->replaceAllUsesWith(Init); 558 MDNode::deleteTemporary(Temp); 559 ForwardRefMDNodes.erase(FI); 560 561 assert(NumberedMetadata[MetadataID] == Init && "Tracking VH didn't work"); 562 } else { 563 if (MetadataID >= NumberedMetadata.size()) 564 NumberedMetadata.resize(MetadataID+1); 565 566 if (NumberedMetadata[MetadataID] != 0) 567 return TokError("Metadata id is already used"); 568 NumberedMetadata[MetadataID] = Init; 569 } 570 571 return false; 572} 573 574/// ParseAlias: 575/// ::= GlobalVar '=' OptionalVisibility 'alias' OptionalLinkage Aliasee 576/// Aliasee 577/// ::= TypeAndValue 578/// ::= 'bitcast' '(' TypeAndValue 'to' Type ')' 579/// ::= 'getelementptr' 'inbounds'? '(' ... ')' 580/// 581/// Everything through visibility has already been parsed. 582/// 583bool LLParser::ParseAlias(const std::string &Name, LocTy NameLoc, 584 unsigned Visibility) { 585 assert(Lex.getKind() == lltok::kw_alias); 586 Lex.Lex(); 587 unsigned Linkage; 588 LocTy LinkageLoc = Lex.getLoc(); 589 if (ParseOptionalLinkage(Linkage)) 590 return true; 591 592 if (Linkage != GlobalValue::ExternalLinkage && 593 Linkage != GlobalValue::WeakAnyLinkage && 594 Linkage != GlobalValue::WeakODRLinkage && 595 Linkage != GlobalValue::InternalLinkage && 596 Linkage != GlobalValue::PrivateLinkage && 597 Linkage != GlobalValue::LinkerPrivateLinkage && 598 Linkage != GlobalValue::LinkerPrivateWeakLinkage && 599 Linkage != GlobalValue::LinkerPrivateWeakDefAutoLinkage) 600 return Error(LinkageLoc, "invalid linkage type for alias"); 601 602 Constant *Aliasee; 603 LocTy AliaseeLoc = Lex.getLoc(); 604 if (Lex.getKind() != lltok::kw_bitcast && 605 Lex.getKind() != lltok::kw_getelementptr) { 606 if (ParseGlobalTypeAndValue(Aliasee)) return true; 607 } else { 608 // The bitcast dest type is not present, it is implied by the dest type. 609 ValID ID; 610 if (ParseValID(ID)) return true; 611 if (ID.Kind != ValID::t_Constant) 612 return Error(AliaseeLoc, "invalid aliasee"); 613 Aliasee = ID.ConstantVal; 614 } 615 616 if (!Aliasee->getType()->isPointerTy()) 617 return Error(AliaseeLoc, "alias must have pointer type"); 618 619 // Okay, create the alias but do not insert it into the module yet. 620 GlobalAlias* GA = new GlobalAlias(Aliasee->getType(), 621 (GlobalValue::LinkageTypes)Linkage, Name, 622 Aliasee); 623 GA->setVisibility((GlobalValue::VisibilityTypes)Visibility); 624 625 // See if this value already exists in the symbol table. If so, it is either 626 // a redefinition or a definition of a forward reference. 627 if (GlobalValue *Val = M->getNamedValue(Name)) { 628 // See if this was a redefinition. If so, there is no entry in 629 // ForwardRefVals. 630 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 631 I = ForwardRefVals.find(Name); 632 if (I == ForwardRefVals.end()) 633 return Error(NameLoc, "redefinition of global named '@" + Name + "'"); 634 635 // Otherwise, this was a definition of forward ref. Verify that types 636 // agree. 637 if (Val->getType() != GA->getType()) 638 return Error(NameLoc, 639 "forward reference and definition of alias have different types"); 640 641 // If they agree, just RAUW the old value with the alias and remove the 642 // forward ref info. 643 Val->replaceAllUsesWith(GA); 644 Val->eraseFromParent(); 645 ForwardRefVals.erase(I); 646 } 647 648 // Insert into the module, we know its name won't collide now. 649 M->getAliasList().push_back(GA); 650 assert(GA->getName() == Name && "Should not be a name conflict!"); 651 652 return false; 653} 654 655/// ParseGlobal 656/// ::= GlobalVar '=' OptionalLinkage OptionalVisibility OptionalThreadLocal 657/// OptionalAddrSpace OptionalUnNammedAddr GlobalType Type Const 658/// ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 659/// OptionalAddrSpace OptionalUnNammedAddr GlobalType Type Const 660/// 661/// Everything through visibility has been parsed already. 662/// 663bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc, 664 unsigned Linkage, bool HasLinkage, 665 unsigned Visibility) { 666 unsigned AddrSpace; 667 bool ThreadLocal, IsConstant, UnnamedAddr; 668 LocTy UnnamedAddrLoc; 669 LocTy TyLoc; 670 671 PATypeHolder Ty(Type::getVoidTy(Context)); 672 if (ParseOptionalToken(lltok::kw_thread_local, ThreadLocal) || 673 ParseOptionalAddrSpace(AddrSpace) || 674 ParseOptionalToken(lltok::kw_unnamed_addr, UnnamedAddr, 675 &UnnamedAddrLoc) || 676 ParseGlobalType(IsConstant) || 677 ParseType(Ty, TyLoc)) 678 return true; 679 680 // If the linkage is specified and is external, then no initializer is 681 // present. 682 Constant *Init = 0; 683 if (!HasLinkage || (Linkage != GlobalValue::DLLImportLinkage && 684 Linkage != GlobalValue::ExternalWeakLinkage && 685 Linkage != GlobalValue::ExternalLinkage)) { 686 if (ParseGlobalValue(Ty, Init)) 687 return true; 688 } 689 690 if (Ty->isFunctionTy() || Ty->isLabelTy()) 691 return Error(TyLoc, "invalid type for global variable"); 692 693 GlobalVariable *GV = 0; 694 695 // See if the global was forward referenced, if so, use the global. 696 if (!Name.empty()) { 697 if (GlobalValue *GVal = M->getNamedValue(Name)) { 698 if (!ForwardRefVals.erase(Name) || !isa<GlobalValue>(GVal)) 699 return Error(NameLoc, "redefinition of global '@" + Name + "'"); 700 GV = cast<GlobalVariable>(GVal); 701 } 702 } else { 703 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 704 I = ForwardRefValIDs.find(NumberedVals.size()); 705 if (I != ForwardRefValIDs.end()) { 706 GV = cast<GlobalVariable>(I->second.first); 707 ForwardRefValIDs.erase(I); 708 } 709 } 710 711 if (GV == 0) { 712 GV = new GlobalVariable(*M, Ty, false, GlobalValue::ExternalLinkage, 0, 713 Name, 0, false, AddrSpace); 714 } else { 715 if (GV->getType()->getElementType() != Ty) 716 return Error(TyLoc, 717 "forward reference and definition of global have different types"); 718 719 // Move the forward-reference to the correct spot in the module. 720 M->getGlobalList().splice(M->global_end(), M->getGlobalList(), GV); 721 } 722 723 if (Name.empty()) 724 NumberedVals.push_back(GV); 725 726 // Set the parsed properties on the global. 727 if (Init) 728 GV->setInitializer(Init); 729 GV->setConstant(IsConstant); 730 GV->setLinkage((GlobalValue::LinkageTypes)Linkage); 731 GV->setVisibility((GlobalValue::VisibilityTypes)Visibility); 732 GV->setThreadLocal(ThreadLocal); 733 GV->setUnnamedAddr(UnnamedAddr); 734 735 // Parse attributes on the global. 736 while (Lex.getKind() == lltok::comma) { 737 Lex.Lex(); 738 739 if (Lex.getKind() == lltok::kw_section) { 740 Lex.Lex(); 741 GV->setSection(Lex.getStrVal()); 742 if (ParseToken(lltok::StringConstant, "expected global section string")) 743 return true; 744 } else if (Lex.getKind() == lltok::kw_align) { 745 unsigned Alignment; 746 if (ParseOptionalAlignment(Alignment)) return true; 747 GV->setAlignment(Alignment); 748 } else { 749 TokError("unknown global variable property!"); 750 } 751 } 752 753 return false; 754} 755 756 757//===----------------------------------------------------------------------===// 758// GlobalValue Reference/Resolution Routines. 759//===----------------------------------------------------------------------===// 760 761/// GetGlobalVal - Get a value with the specified name or ID, creating a 762/// forward reference record if needed. This can return null if the value 763/// exists but does not have the right type. 764GlobalValue *LLParser::GetGlobalVal(const std::string &Name, const Type *Ty, 765 LocTy Loc) { 766 const PointerType *PTy = dyn_cast<PointerType>(Ty); 767 if (PTy == 0) { 768 Error(Loc, "global variable reference must have pointer type"); 769 return 0; 770 } 771 772 // Look this name up in the normal function symbol table. 773 GlobalValue *Val = 774 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name)); 775 776 // If this is a forward reference for the value, see if we already created a 777 // forward ref record. 778 if (Val == 0) { 779 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 780 I = ForwardRefVals.find(Name); 781 if (I != ForwardRefVals.end()) 782 Val = I->second.first; 783 } 784 785 // If we have the value in the symbol table or fwd-ref table, return it. 786 if (Val) { 787 if (Val->getType() == Ty) return Val; 788 Error(Loc, "'@" + Name + "' defined with type '" + 789 getTypeString(Val->getType()) + "'"); 790 return 0; 791 } 792 793 // Otherwise, create a new forward reference for this value and remember it. 794 GlobalValue *FwdVal; 795 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 796 // Function types can return opaque but functions can't. 797 if (FT->getReturnType()->isOpaqueTy()) { 798 Error(Loc, "function may not return opaque type"); 799 return 0; 800 } 801 802 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M); 803 } else { 804 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 805 GlobalValue::ExternalWeakLinkage, 0, Name); 806 } 807 808 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 809 return FwdVal; 810} 811 812GlobalValue *LLParser::GetGlobalVal(unsigned ID, const Type *Ty, LocTy Loc) { 813 const PointerType *PTy = dyn_cast<PointerType>(Ty); 814 if (PTy == 0) { 815 Error(Loc, "global variable reference must have pointer type"); 816 return 0; 817 } 818 819 GlobalValue *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 820 821 // If this is a forward reference for the value, see if we already created a 822 // forward ref record. 823 if (Val == 0) { 824 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 825 I = ForwardRefValIDs.find(ID); 826 if (I != ForwardRefValIDs.end()) 827 Val = I->second.first; 828 } 829 830 // If we have the value in the symbol table or fwd-ref table, return it. 831 if (Val) { 832 if (Val->getType() == Ty) return Val; 833 Error(Loc, "'@" + Twine(ID) + "' defined with type '" + 834 getTypeString(Val->getType()) + "'"); 835 return 0; 836 } 837 838 // Otherwise, create a new forward reference for this value and remember it. 839 GlobalValue *FwdVal; 840 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 841 // Function types can return opaque but functions can't. 842 if (FT->getReturnType()->isOpaqueTy()) { 843 Error(Loc, "function may not return opaque type"); 844 return 0; 845 } 846 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, "", M); 847 } else { 848 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 849 GlobalValue::ExternalWeakLinkage, 0, ""); 850 } 851 852 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 853 return FwdVal; 854} 855 856 857//===----------------------------------------------------------------------===// 858// Helper Routines. 859//===----------------------------------------------------------------------===// 860 861/// ParseToken - If the current token has the specified kind, eat it and return 862/// success. Otherwise, emit the specified error and return failure. 863bool LLParser::ParseToken(lltok::Kind T, const char *ErrMsg) { 864 if (Lex.getKind() != T) 865 return TokError(ErrMsg); 866 Lex.Lex(); 867 return false; 868} 869 870/// ParseStringConstant 871/// ::= StringConstant 872bool LLParser::ParseStringConstant(std::string &Result) { 873 if (Lex.getKind() != lltok::StringConstant) 874 return TokError("expected string constant"); 875 Result = Lex.getStrVal(); 876 Lex.Lex(); 877 return false; 878} 879 880/// ParseUInt32 881/// ::= uint32 882bool LLParser::ParseUInt32(unsigned &Val) { 883 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned()) 884 return TokError("expected integer"); 885 uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(0xFFFFFFFFULL+1); 886 if (Val64 != unsigned(Val64)) 887 return TokError("expected 32-bit integer (too large)"); 888 Val = Val64; 889 Lex.Lex(); 890 return false; 891} 892 893 894/// ParseOptionalAddrSpace 895/// := /*empty*/ 896/// := 'addrspace' '(' uint32 ')' 897bool LLParser::ParseOptionalAddrSpace(unsigned &AddrSpace) { 898 AddrSpace = 0; 899 if (!EatIfPresent(lltok::kw_addrspace)) 900 return false; 901 return ParseToken(lltok::lparen, "expected '(' in address space") || 902 ParseUInt32(AddrSpace) || 903 ParseToken(lltok::rparen, "expected ')' in address space"); 904} 905 906/// ParseOptionalAttrs - Parse a potentially empty attribute list. AttrKind 907/// indicates what kind of attribute list this is: 0: function arg, 1: result, 908/// 2: function attr. 909bool LLParser::ParseOptionalAttrs(unsigned &Attrs, unsigned AttrKind) { 910 Attrs = Attribute::None; 911 LocTy AttrLoc = Lex.getLoc(); 912 913 while (1) { 914 switch (Lex.getKind()) { 915 default: // End of attributes. 916 if (AttrKind != 2 && (Attrs & Attribute::FunctionOnly)) 917 return Error(AttrLoc, "invalid use of function-only attribute"); 918 919 // As a hack, we allow "align 2" on functions as a synonym for 920 // "alignstack 2". 921 if (AttrKind == 2 && 922 (Attrs & ~(Attribute::FunctionOnly | Attribute::Alignment))) 923 return Error(AttrLoc, "invalid use of attribute on a function"); 924 925 if (AttrKind != 0 && (Attrs & Attribute::ParameterOnly)) 926 return Error(AttrLoc, "invalid use of parameter-only attribute"); 927 928 return false; 929 case lltok::kw_zeroext: Attrs |= Attribute::ZExt; break; 930 case lltok::kw_signext: Attrs |= Attribute::SExt; break; 931 case lltok::kw_inreg: Attrs |= Attribute::InReg; break; 932 case lltok::kw_sret: Attrs |= Attribute::StructRet; break; 933 case lltok::kw_noalias: Attrs |= Attribute::NoAlias; break; 934 case lltok::kw_nocapture: Attrs |= Attribute::NoCapture; break; 935 case lltok::kw_byval: Attrs |= Attribute::ByVal; break; 936 case lltok::kw_nest: Attrs |= Attribute::Nest; break; 937 938 case lltok::kw_noreturn: Attrs |= Attribute::NoReturn; break; 939 case lltok::kw_nounwind: Attrs |= Attribute::NoUnwind; break; 940 case lltok::kw_uwtable: Attrs |= Attribute::UWTable; break; 941 case lltok::kw_noinline: Attrs |= Attribute::NoInline; break; 942 case lltok::kw_readnone: Attrs |= Attribute::ReadNone; break; 943 case lltok::kw_readonly: Attrs |= Attribute::ReadOnly; break; 944 case lltok::kw_inlinehint: Attrs |= Attribute::InlineHint; break; 945 case lltok::kw_alwaysinline: Attrs |= Attribute::AlwaysInline; break; 946 case lltok::kw_optsize: Attrs |= Attribute::OptimizeForSize; break; 947 case lltok::kw_ssp: Attrs |= Attribute::StackProtect; break; 948 case lltok::kw_sspreq: Attrs |= Attribute::StackProtectReq; break; 949 case lltok::kw_noredzone: Attrs |= Attribute::NoRedZone; break; 950 case lltok::kw_noimplicitfloat: Attrs |= Attribute::NoImplicitFloat; break; 951 case lltok::kw_naked: Attrs |= Attribute::Naked; break; 952 case lltok::kw_hotpatch: Attrs |= Attribute::Hotpatch; break; 953 case lltok::kw_nonlazybind: Attrs |= Attribute::NonLazyBind; break; 954 955 case lltok::kw_alignstack: { 956 unsigned Alignment; 957 if (ParseOptionalStackAlignment(Alignment)) 958 return true; 959 Attrs |= Attribute::constructStackAlignmentFromInt(Alignment); 960 continue; 961 } 962 963 case lltok::kw_align: { 964 unsigned Alignment; 965 if (ParseOptionalAlignment(Alignment)) 966 return true; 967 Attrs |= Attribute::constructAlignmentFromInt(Alignment); 968 continue; 969 } 970 971 } 972 Lex.Lex(); 973 } 974} 975 976/// ParseOptionalLinkage 977/// ::= /*empty*/ 978/// ::= 'private' 979/// ::= 'linker_private' 980/// ::= 'linker_private_weak' 981/// ::= 'linker_private_weak_def_auto' 982/// ::= 'internal' 983/// ::= 'weak' 984/// ::= 'weak_odr' 985/// ::= 'linkonce' 986/// ::= 'linkonce_odr' 987/// ::= 'available_externally' 988/// ::= 'appending' 989/// ::= 'dllexport' 990/// ::= 'common' 991/// ::= 'dllimport' 992/// ::= 'extern_weak' 993/// ::= 'external' 994bool LLParser::ParseOptionalLinkage(unsigned &Res, bool &HasLinkage) { 995 HasLinkage = false; 996 switch (Lex.getKind()) { 997 default: Res=GlobalValue::ExternalLinkage; return false; 998 case lltok::kw_private: Res = GlobalValue::PrivateLinkage; break; 999 case lltok::kw_linker_private: Res = GlobalValue::LinkerPrivateLinkage; break; 1000 case lltok::kw_linker_private_weak: 1001 Res = GlobalValue::LinkerPrivateWeakLinkage; 1002 break; 1003 case lltok::kw_linker_private_weak_def_auto: 1004 Res = GlobalValue::LinkerPrivateWeakDefAutoLinkage; 1005 break; 1006 case lltok::kw_internal: Res = GlobalValue::InternalLinkage; break; 1007 case lltok::kw_weak: Res = GlobalValue::WeakAnyLinkage; break; 1008 case lltok::kw_weak_odr: Res = GlobalValue::WeakODRLinkage; break; 1009 case lltok::kw_linkonce: Res = GlobalValue::LinkOnceAnyLinkage; break; 1010 case lltok::kw_linkonce_odr: Res = GlobalValue::LinkOnceODRLinkage; break; 1011 case lltok::kw_available_externally: 1012 Res = GlobalValue::AvailableExternallyLinkage; 1013 break; 1014 case lltok::kw_appending: Res = GlobalValue::AppendingLinkage; break; 1015 case lltok::kw_dllexport: Res = GlobalValue::DLLExportLinkage; break; 1016 case lltok::kw_common: Res = GlobalValue::CommonLinkage; break; 1017 case lltok::kw_dllimport: Res = GlobalValue::DLLImportLinkage; break; 1018 case lltok::kw_extern_weak: Res = GlobalValue::ExternalWeakLinkage; break; 1019 case lltok::kw_external: Res = GlobalValue::ExternalLinkage; break; 1020 } 1021 Lex.Lex(); 1022 HasLinkage = true; 1023 return false; 1024} 1025 1026/// ParseOptionalVisibility 1027/// ::= /*empty*/ 1028/// ::= 'default' 1029/// ::= 'hidden' 1030/// ::= 'protected' 1031/// 1032bool LLParser::ParseOptionalVisibility(unsigned &Res) { 1033 switch (Lex.getKind()) { 1034 default: Res = GlobalValue::DefaultVisibility; return false; 1035 case lltok::kw_default: Res = GlobalValue::DefaultVisibility; break; 1036 case lltok::kw_hidden: Res = GlobalValue::HiddenVisibility; break; 1037 case lltok::kw_protected: Res = GlobalValue::ProtectedVisibility; break; 1038 } 1039 Lex.Lex(); 1040 return false; 1041} 1042 1043/// ParseOptionalCallingConv 1044/// ::= /*empty*/ 1045/// ::= 'ccc' 1046/// ::= 'fastcc' 1047/// ::= 'coldcc' 1048/// ::= 'x86_stdcallcc' 1049/// ::= 'x86_fastcallcc' 1050/// ::= 'x86_thiscallcc' 1051/// ::= 'arm_apcscc' 1052/// ::= 'arm_aapcscc' 1053/// ::= 'arm_aapcs_vfpcc' 1054/// ::= 'msp430_intrcc' 1055/// ::= 'ptx_kernel' 1056/// ::= 'ptx_device' 1057/// ::= 'cc' UINT 1058/// 1059bool LLParser::ParseOptionalCallingConv(CallingConv::ID &CC) { 1060 switch (Lex.getKind()) { 1061 default: CC = CallingConv::C; return false; 1062 case lltok::kw_ccc: CC = CallingConv::C; break; 1063 case lltok::kw_fastcc: CC = CallingConv::Fast; break; 1064 case lltok::kw_coldcc: CC = CallingConv::Cold; break; 1065 case lltok::kw_x86_stdcallcc: CC = CallingConv::X86_StdCall; break; 1066 case lltok::kw_x86_fastcallcc: CC = CallingConv::X86_FastCall; break; 1067 case lltok::kw_x86_thiscallcc: CC = CallingConv::X86_ThisCall; break; 1068 case lltok::kw_arm_apcscc: CC = CallingConv::ARM_APCS; break; 1069 case lltok::kw_arm_aapcscc: CC = CallingConv::ARM_AAPCS; break; 1070 case lltok::kw_arm_aapcs_vfpcc:CC = CallingConv::ARM_AAPCS_VFP; break; 1071 case lltok::kw_msp430_intrcc: CC = CallingConv::MSP430_INTR; break; 1072 case lltok::kw_ptx_kernel: CC = CallingConv::PTX_Kernel; break; 1073 case lltok::kw_ptx_device: CC = CallingConv::PTX_Device; break; 1074 case lltok::kw_cc: { 1075 unsigned ArbitraryCC; 1076 Lex.Lex(); 1077 if (ParseUInt32(ArbitraryCC)) { 1078 return true; 1079 } else 1080 CC = static_cast<CallingConv::ID>(ArbitraryCC); 1081 return false; 1082 } 1083 break; 1084 } 1085 1086 Lex.Lex(); 1087 return false; 1088} 1089 1090/// ParseInstructionMetadata 1091/// ::= !dbg !42 (',' !dbg !57)* 1092bool LLParser::ParseInstructionMetadata(Instruction *Inst, 1093 PerFunctionState *PFS) { 1094 do { 1095 if (Lex.getKind() != lltok::MetadataVar) 1096 return TokError("expected metadata after comma"); 1097 1098 std::string Name = Lex.getStrVal(); 1099 unsigned MDK = M->getMDKindID(Name.c_str()); 1100 Lex.Lex(); 1101 1102 MDNode *Node; 1103 SMLoc Loc = Lex.getLoc(); 1104 1105 if (ParseToken(lltok::exclaim, "expected '!' here")) 1106 return true; 1107 1108 // This code is similar to that of ParseMetadataValue, however it needs to 1109 // have special-case code for a forward reference; see the comments on 1110 // ForwardRefInstMetadata for details. Also, MDStrings are not supported 1111 // at the top level here. 1112 if (Lex.getKind() == lltok::lbrace) { 1113 ValID ID; 1114 if (ParseMetadataListValue(ID, PFS)) 1115 return true; 1116 assert(ID.Kind == ValID::t_MDNode); 1117 Inst->setMetadata(MDK, ID.MDNodeVal); 1118 } else { 1119 unsigned NodeID = 0; 1120 if (ParseMDNodeID(Node, NodeID)) 1121 return true; 1122 if (Node) { 1123 // If we got the node, add it to the instruction. 1124 Inst->setMetadata(MDK, Node); 1125 } else { 1126 MDRef R = { Loc, MDK, NodeID }; 1127 // Otherwise, remember that this should be resolved later. 1128 ForwardRefInstMetadata[Inst].push_back(R); 1129 } 1130 } 1131 1132 // If this is the end of the list, we're done. 1133 } while (EatIfPresent(lltok::comma)); 1134 return false; 1135} 1136 1137/// ParseOptionalAlignment 1138/// ::= /* empty */ 1139/// ::= 'align' 4 1140bool LLParser::ParseOptionalAlignment(unsigned &Alignment) { 1141 Alignment = 0; 1142 if (!EatIfPresent(lltok::kw_align)) 1143 return false; 1144 LocTy AlignLoc = Lex.getLoc(); 1145 if (ParseUInt32(Alignment)) return true; 1146 if (!isPowerOf2_32(Alignment)) 1147 return Error(AlignLoc, "alignment is not a power of two"); 1148 if (Alignment > Value::MaximumAlignment) 1149 return Error(AlignLoc, "huge alignments are not supported yet"); 1150 return false; 1151} 1152 1153/// ParseOptionalCommaAlign 1154/// ::= 1155/// ::= ',' align 4 1156/// 1157/// This returns with AteExtraComma set to true if it ate an excess comma at the 1158/// end. 1159bool LLParser::ParseOptionalCommaAlign(unsigned &Alignment, 1160 bool &AteExtraComma) { 1161 AteExtraComma = false; 1162 while (EatIfPresent(lltok::comma)) { 1163 // Metadata at the end is an early exit. 1164 if (Lex.getKind() == lltok::MetadataVar) { 1165 AteExtraComma = true; 1166 return false; 1167 } 1168 1169 if (Lex.getKind() != lltok::kw_align) 1170 return Error(Lex.getLoc(), "expected metadata or 'align'"); 1171 1172 if (ParseOptionalAlignment(Alignment)) return true; 1173 } 1174 1175 return false; 1176} 1177 1178/// ParseOptionalStackAlignment 1179/// ::= /* empty */ 1180/// ::= 'alignstack' '(' 4 ')' 1181bool LLParser::ParseOptionalStackAlignment(unsigned &Alignment) { 1182 Alignment = 0; 1183 if (!EatIfPresent(lltok::kw_alignstack)) 1184 return false; 1185 LocTy ParenLoc = Lex.getLoc(); 1186 if (!EatIfPresent(lltok::lparen)) 1187 return Error(ParenLoc, "expected '('"); 1188 LocTy AlignLoc = Lex.getLoc(); 1189 if (ParseUInt32(Alignment)) return true; 1190 ParenLoc = Lex.getLoc(); 1191 if (!EatIfPresent(lltok::rparen)) 1192 return Error(ParenLoc, "expected ')'"); 1193 if (!isPowerOf2_32(Alignment)) 1194 return Error(AlignLoc, "stack alignment is not a power of two"); 1195 return false; 1196} 1197 1198/// ParseIndexList - This parses the index list for an insert/extractvalue 1199/// instruction. This sets AteExtraComma in the case where we eat an extra 1200/// comma at the end of the line and find that it is followed by metadata. 1201/// Clients that don't allow metadata can call the version of this function that 1202/// only takes one argument. 1203/// 1204/// ParseIndexList 1205/// ::= (',' uint32)+ 1206/// 1207bool LLParser::ParseIndexList(SmallVectorImpl<unsigned> &Indices, 1208 bool &AteExtraComma) { 1209 AteExtraComma = false; 1210 1211 if (Lex.getKind() != lltok::comma) 1212 return TokError("expected ',' as start of index list"); 1213 1214 while (EatIfPresent(lltok::comma)) { 1215 if (Lex.getKind() == lltok::MetadataVar) { 1216 AteExtraComma = true; 1217 return false; 1218 } 1219 unsigned Idx = 0; 1220 if (ParseUInt32(Idx)) return true; 1221 Indices.push_back(Idx); 1222 } 1223 1224 return false; 1225} 1226 1227//===----------------------------------------------------------------------===// 1228// Type Parsing. 1229//===----------------------------------------------------------------------===// 1230 1231/// ParseType - Parse and resolve a full type. 1232bool LLParser::ParseType(PATypeHolder &Result, bool AllowVoid) { 1233 LocTy TypeLoc = Lex.getLoc(); 1234 if (ParseTypeRec(Result)) return true; 1235 1236 // Verify no unresolved uprefs. 1237 if (!UpRefs.empty()) 1238 return Error(UpRefs.back().Loc, "invalid unresolved type up reference"); 1239 1240 if (!AllowVoid && Result.get()->isVoidTy()) 1241 return Error(TypeLoc, "void type only allowed for function results"); 1242 1243 return false; 1244} 1245 1246/// HandleUpRefs - Every time we finish a new layer of types, this function is 1247/// called. It loops through the UpRefs vector, which is a list of the 1248/// currently active types. For each type, if the up-reference is contained in 1249/// the newly completed type, we decrement the level count. When the level 1250/// count reaches zero, the up-referenced type is the type that is passed in: 1251/// thus we can complete the cycle. 1252/// 1253PATypeHolder LLParser::HandleUpRefs(const Type *ty) { 1254 // If Ty isn't abstract, or if there are no up-references in it, then there is 1255 // nothing to resolve here. 1256 if (!ty->isAbstract() || UpRefs.empty()) return ty; 1257 1258 PATypeHolder Ty(ty); 1259#if 0 1260 dbgs() << "Type '" << *Ty 1261 << "' newly formed. Resolving upreferences.\n" 1262 << UpRefs.size() << " upreferences active!\n"; 1263#endif 1264 1265 // If we find any resolvable upreferences (i.e., those whose NestingLevel goes 1266 // to zero), we resolve them all together before we resolve them to Ty. At 1267 // the end of the loop, if there is anything to resolve to Ty, it will be in 1268 // this variable. 1269 OpaqueType *TypeToResolve = 0; 1270 1271 for (unsigned i = 0; i != UpRefs.size(); ++i) { 1272 // Determine if 'Ty' directly contains this up-references 'LastContainedTy'. 1273 bool ContainsType = 1274 std::find(Ty->subtype_begin(), Ty->subtype_end(), 1275 UpRefs[i].LastContainedTy) != Ty->subtype_end(); 1276 1277#if 0 1278 dbgs() << " UR#" << i << " - TypeContains(" << *Ty << ", " 1279 << *UpRefs[i].LastContainedTy << ") = " 1280 << (ContainsType ? "true" : "false") 1281 << " level=" << UpRefs[i].NestingLevel << "\n"; 1282#endif 1283 if (!ContainsType) 1284 continue; 1285 1286 // Decrement level of upreference 1287 unsigned Level = --UpRefs[i].NestingLevel; 1288 UpRefs[i].LastContainedTy = Ty; 1289 1290 // If the Up-reference has a non-zero level, it shouldn't be resolved yet. 1291 if (Level != 0) 1292 continue; 1293 1294#if 0 1295 dbgs() << " * Resolving upreference for " << UpRefs[i].UpRefTy << "\n"; 1296#endif 1297 if (!TypeToResolve) 1298 TypeToResolve = UpRefs[i].UpRefTy; 1299 else 1300 UpRefs[i].UpRefTy->refineAbstractTypeTo(TypeToResolve); 1301 UpRefs.erase(UpRefs.begin()+i); // Remove from upreference list. 1302 --i; // Do not skip the next element. 1303 } 1304 1305 if (TypeToResolve) 1306 TypeToResolve->refineAbstractTypeTo(Ty); 1307 1308 return Ty; 1309} 1310 1311 1312/// ParseTypeRec - The recursive function used to process the internal 1313/// implementation details of types. 1314bool LLParser::ParseTypeRec(PATypeHolder &Result) { 1315 switch (Lex.getKind()) { 1316 default: 1317 return TokError("expected type"); 1318 case lltok::Type: 1319 // TypeRec ::= 'float' | 'void' (etc) 1320 Result = Lex.getTyVal(); 1321 Lex.Lex(); 1322 break; 1323 case lltok::kw_opaque: 1324 // TypeRec ::= 'opaque' 1325 Result = OpaqueType::get(Context); 1326 Lex.Lex(); 1327 break; 1328 case lltok::lbrace: 1329 // TypeRec ::= '{' ... '}' 1330 if (ParseStructType(Result, false)) 1331 return true; 1332 break; 1333 case lltok::lsquare: 1334 // TypeRec ::= '[' ... ']' 1335 Lex.Lex(); // eat the lsquare. 1336 if (ParseArrayVectorType(Result, false)) 1337 return true; 1338 break; 1339 case lltok::less: // Either vector or packed struct. 1340 // TypeRec ::= '<' ... '>' 1341 Lex.Lex(); 1342 if (Lex.getKind() == lltok::lbrace) { 1343 if (ParseStructType(Result, true) || 1344 ParseToken(lltok::greater, "expected '>' at end of packed struct")) 1345 return true; 1346 } else if (ParseArrayVectorType(Result, true)) 1347 return true; 1348 break; 1349 case lltok::LocalVar: 1350 // TypeRec ::= %foo 1351 if (const Type *T = M->getTypeByName(Lex.getStrVal())) { 1352 Result = T; 1353 } else { 1354 Result = OpaqueType::get(Context); 1355 ForwardRefTypes.insert(std::make_pair(Lex.getStrVal(), 1356 std::make_pair(Result, 1357 Lex.getLoc()))); 1358 M->addTypeName(Lex.getStrVal(), Result.get()); 1359 } 1360 Lex.Lex(); 1361 break; 1362 1363 case lltok::LocalVarID: 1364 // TypeRec ::= %4 1365 if (Lex.getUIntVal() < NumberedTypes.size()) 1366 Result = NumberedTypes[Lex.getUIntVal()]; 1367 else { 1368 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 1369 I = ForwardRefTypeIDs.find(Lex.getUIntVal()); 1370 if (I != ForwardRefTypeIDs.end()) 1371 Result = I->second.first; 1372 else { 1373 Result = OpaqueType::get(Context); 1374 ForwardRefTypeIDs.insert(std::make_pair(Lex.getUIntVal(), 1375 std::make_pair(Result, 1376 Lex.getLoc()))); 1377 } 1378 } 1379 Lex.Lex(); 1380 break; 1381 case lltok::backslash: { 1382 // TypeRec ::= '\' 4 1383 Lex.Lex(); 1384 unsigned Val; 1385 if (ParseUInt32(Val)) return true; 1386 OpaqueType *OT = OpaqueType::get(Context); //Use temporary placeholder. 1387 UpRefs.push_back(UpRefRecord(Lex.getLoc(), Val, OT)); 1388 Result = OT; 1389 break; 1390 } 1391 } 1392 1393 // Parse the type suffixes. 1394 while (1) { 1395 switch (Lex.getKind()) { 1396 // End of type. 1397 default: return false; 1398 1399 // TypeRec ::= TypeRec '*' 1400 case lltok::star: 1401 if (Result.get()->isLabelTy()) 1402 return TokError("basic block pointers are invalid"); 1403 if (Result.get()->isVoidTy()) 1404 return TokError("pointers to void are invalid; use i8* instead"); 1405 if (!PointerType::isValidElementType(Result.get())) 1406 return TokError("pointer to this type is invalid"); 1407 Result = HandleUpRefs(PointerType::getUnqual(Result.get())); 1408 Lex.Lex(); 1409 break; 1410 1411 // TypeRec ::= TypeRec 'addrspace' '(' uint32 ')' '*' 1412 case lltok::kw_addrspace: { 1413 if (Result.get()->isLabelTy()) 1414 return TokError("basic block pointers are invalid"); 1415 if (Result.get()->isVoidTy()) 1416 return TokError("pointers to void are invalid; use i8* instead"); 1417 if (!PointerType::isValidElementType(Result.get())) 1418 return TokError("pointer to this type is invalid"); 1419 unsigned AddrSpace; 1420 if (ParseOptionalAddrSpace(AddrSpace) || 1421 ParseToken(lltok::star, "expected '*' in address space")) 1422 return true; 1423 1424 Result = HandleUpRefs(PointerType::get(Result.get(), AddrSpace)); 1425 break; 1426 } 1427 1428 /// Types '(' ArgTypeListI ')' OptFuncAttrs 1429 case lltok::lparen: 1430 if (ParseFunctionType(Result)) 1431 return true; 1432 break; 1433 } 1434 } 1435} 1436 1437/// ParseParameterList 1438/// ::= '(' ')' 1439/// ::= '(' Arg (',' Arg)* ')' 1440/// Arg 1441/// ::= Type OptionalAttributes Value OptionalAttributes 1442bool LLParser::ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList, 1443 PerFunctionState &PFS) { 1444 if (ParseToken(lltok::lparen, "expected '(' in call")) 1445 return true; 1446 1447 while (Lex.getKind() != lltok::rparen) { 1448 // If this isn't the first argument, we need a comma. 1449 if (!ArgList.empty() && 1450 ParseToken(lltok::comma, "expected ',' in argument list")) 1451 return true; 1452 1453 // Parse the argument. 1454 LocTy ArgLoc; 1455 PATypeHolder ArgTy(Type::getVoidTy(Context)); 1456 unsigned ArgAttrs1 = Attribute::None; 1457 unsigned ArgAttrs2 = Attribute::None; 1458 Value *V; 1459 if (ParseType(ArgTy, ArgLoc)) 1460 return true; 1461 1462 // Otherwise, handle normal operands. 1463 if (ParseOptionalAttrs(ArgAttrs1, 0) || ParseValue(ArgTy, V, PFS)) 1464 return true; 1465 ArgList.push_back(ParamInfo(ArgLoc, V, ArgAttrs1|ArgAttrs2)); 1466 } 1467 1468 Lex.Lex(); // Lex the ')'. 1469 return false; 1470} 1471 1472 1473 1474/// ParseArgumentList - Parse the argument list for a function type or function 1475/// prototype. If 'inType' is true then we are parsing a FunctionType. 1476/// ::= '(' ArgTypeListI ')' 1477/// ArgTypeListI 1478/// ::= /*empty*/ 1479/// ::= '...' 1480/// ::= ArgTypeList ',' '...' 1481/// ::= ArgType (',' ArgType)* 1482/// 1483bool LLParser::ParseArgumentList(std::vector<ArgInfo> &ArgList, 1484 bool &isVarArg, bool inType) { 1485 isVarArg = false; 1486 assert(Lex.getKind() == lltok::lparen); 1487 Lex.Lex(); // eat the (. 1488 1489 if (Lex.getKind() == lltok::rparen) { 1490 // empty 1491 } else if (Lex.getKind() == lltok::dotdotdot) { 1492 isVarArg = true; 1493 Lex.Lex(); 1494 } else { 1495 LocTy TypeLoc = Lex.getLoc(); 1496 PATypeHolder ArgTy(Type::getVoidTy(Context)); 1497 unsigned Attrs; 1498 std::string Name; 1499 1500 // If we're parsing a type, use ParseTypeRec, because we allow recursive 1501 // types (such as a function returning a pointer to itself). If parsing a 1502 // function prototype, we require fully resolved types. 1503 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1504 ParseOptionalAttrs(Attrs, 0)) return true; 1505 1506 if (ArgTy->isVoidTy()) 1507 return Error(TypeLoc, "argument can not have void type"); 1508 1509 if (Lex.getKind() == lltok::LocalVar) { 1510 Name = Lex.getStrVal(); 1511 Lex.Lex(); 1512 } 1513 1514 if (!FunctionType::isValidArgumentType(ArgTy)) 1515 return Error(TypeLoc, "invalid type for function argument"); 1516 1517 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1518 1519 while (EatIfPresent(lltok::comma)) { 1520 // Handle ... at end of arg list. 1521 if (EatIfPresent(lltok::dotdotdot)) { 1522 isVarArg = true; 1523 break; 1524 } 1525 1526 // Otherwise must be an argument type. 1527 TypeLoc = Lex.getLoc(); 1528 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1529 ParseOptionalAttrs(Attrs, 0)) return true; 1530 1531 if (ArgTy->isVoidTy()) 1532 return Error(TypeLoc, "argument can not have void type"); 1533 1534 if (Lex.getKind() == lltok::LocalVar) { 1535 Name = Lex.getStrVal(); 1536 Lex.Lex(); 1537 } else { 1538 Name = ""; 1539 } 1540 1541 if (!ArgTy->isFirstClassType() && !ArgTy->isOpaqueTy()) 1542 return Error(TypeLoc, "invalid type for function argument"); 1543 1544 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1545 } 1546 } 1547 1548 return ParseToken(lltok::rparen, "expected ')' at end of argument list"); 1549} 1550 1551/// ParseFunctionType 1552/// ::= Type ArgumentList OptionalAttrs 1553bool LLParser::ParseFunctionType(PATypeHolder &Result) { 1554 assert(Lex.getKind() == lltok::lparen); 1555 1556 if (!FunctionType::isValidReturnType(Result)) 1557 return TokError("invalid function return type"); 1558 1559 std::vector<ArgInfo> ArgList; 1560 bool isVarArg; 1561 if (ParseArgumentList(ArgList, isVarArg, true)) 1562 return true; 1563 1564 // Reject names on the arguments lists. 1565 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 1566 if (!ArgList[i].Name.empty()) 1567 return Error(ArgList[i].Loc, "argument name invalid in function type"); 1568 if (ArgList[i].Attrs != 0) 1569 return Error(ArgList[i].Loc, 1570 "argument attributes invalid in function type"); 1571 } 1572 1573 std::vector<const Type*> ArgListTy; 1574 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 1575 ArgListTy.push_back(ArgList[i].Type); 1576 1577 Result = HandleUpRefs(FunctionType::get(Result.get(), 1578 ArgListTy, isVarArg)); 1579 return false; 1580} 1581 1582/// ParseStructType: Handles packed and unpacked types. </> parsed elsewhere. 1583/// TypeRec 1584/// ::= '{' '}' 1585/// ::= '{' TypeRec (',' TypeRec)* '}' 1586/// ::= '<' '{' '}' '>' 1587/// ::= '<' '{' TypeRec (',' TypeRec)* '}' '>' 1588bool LLParser::ParseStructType(PATypeHolder &Result, bool Packed) { 1589 assert(Lex.getKind() == lltok::lbrace); 1590 Lex.Lex(); // Consume the '{' 1591 1592 if (EatIfPresent(lltok::rbrace)) { 1593 Result = StructType::get(Context, Packed); 1594 return false; 1595 } 1596 1597 std::vector<PATypeHolder> ParamsList; 1598 LocTy EltTyLoc = Lex.getLoc(); 1599 if (ParseTypeRec(Result)) return true; 1600 ParamsList.push_back(Result); 1601 1602 if (Result->isVoidTy()) 1603 return Error(EltTyLoc, "struct element can not have void type"); 1604 if (!StructType::isValidElementType(Result)) 1605 return Error(EltTyLoc, "invalid element type for struct"); 1606 1607 while (EatIfPresent(lltok::comma)) { 1608 EltTyLoc = Lex.getLoc(); 1609 if (ParseTypeRec(Result)) return true; 1610 1611 if (Result->isVoidTy()) 1612 return Error(EltTyLoc, "struct element can not have void type"); 1613 if (!StructType::isValidElementType(Result)) 1614 return Error(EltTyLoc, "invalid element type for struct"); 1615 1616 ParamsList.push_back(Result); 1617 } 1618 1619 if (ParseToken(lltok::rbrace, "expected '}' at end of struct")) 1620 return true; 1621 1622 std::vector<const Type*> ParamsListTy; 1623 for (unsigned i = 0, e = ParamsList.size(); i != e; ++i) 1624 ParamsListTy.push_back(ParamsList[i].get()); 1625 Result = HandleUpRefs(StructType::get(Context, ParamsListTy, Packed)); 1626 return false; 1627} 1628 1629/// ParseArrayVectorType - Parse an array or vector type, assuming the first 1630/// token has already been consumed. 1631/// TypeRec 1632/// ::= '[' APSINTVAL 'x' Types ']' 1633/// ::= '<' APSINTVAL 'x' Types '>' 1634bool LLParser::ParseArrayVectorType(PATypeHolder &Result, bool isVector) { 1635 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned() || 1636 Lex.getAPSIntVal().getBitWidth() > 64) 1637 return TokError("expected number in address space"); 1638 1639 LocTy SizeLoc = Lex.getLoc(); 1640 uint64_t Size = Lex.getAPSIntVal().getZExtValue(); 1641 Lex.Lex(); 1642 1643 if (ParseToken(lltok::kw_x, "expected 'x' after element count")) 1644 return true; 1645 1646 LocTy TypeLoc = Lex.getLoc(); 1647 PATypeHolder EltTy(Type::getVoidTy(Context)); 1648 if (ParseTypeRec(EltTy)) return true; 1649 1650 if (EltTy->isVoidTy()) 1651 return Error(TypeLoc, "array and vector element type cannot be void"); 1652 1653 if (ParseToken(isVector ? lltok::greater : lltok::rsquare, 1654 "expected end of sequential type")) 1655 return true; 1656 1657 if (isVector) { 1658 if (Size == 0) 1659 return Error(SizeLoc, "zero element vector is illegal"); 1660 if ((unsigned)Size != Size) 1661 return Error(SizeLoc, "size too large for vector"); 1662 if (!VectorType::isValidElementType(EltTy)) 1663 return Error(TypeLoc, "vector element type must be fp or integer"); 1664 Result = VectorType::get(EltTy, unsigned(Size)); 1665 } else { 1666 if (!ArrayType::isValidElementType(EltTy)) 1667 return Error(TypeLoc, "invalid array element type"); 1668 Result = HandleUpRefs(ArrayType::get(EltTy, Size)); 1669 } 1670 return false; 1671} 1672 1673//===----------------------------------------------------------------------===// 1674// Function Semantic Analysis. 1675//===----------------------------------------------------------------------===// 1676 1677LLParser::PerFunctionState::PerFunctionState(LLParser &p, Function &f, 1678 int functionNumber) 1679 : P(p), F(f), FunctionNumber(functionNumber) { 1680 1681 // Insert unnamed arguments into the NumberedVals list. 1682 for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 1683 AI != E; ++AI) 1684 if (!AI->hasName()) 1685 NumberedVals.push_back(AI); 1686} 1687 1688LLParser::PerFunctionState::~PerFunctionState() { 1689 // If there were any forward referenced non-basicblock values, delete them. 1690 for (std::map<std::string, std::pair<Value*, LocTy> >::iterator 1691 I = ForwardRefVals.begin(), E = ForwardRefVals.end(); I != E; ++I) 1692 if (!isa<BasicBlock>(I->second.first)) { 1693 I->second.first->replaceAllUsesWith( 1694 UndefValue::get(I->second.first->getType())); 1695 delete I->second.first; 1696 I->second.first = 0; 1697 } 1698 1699 for (std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1700 I = ForwardRefValIDs.begin(), E = ForwardRefValIDs.end(); I != E; ++I) 1701 if (!isa<BasicBlock>(I->second.first)) { 1702 I->second.first->replaceAllUsesWith( 1703 UndefValue::get(I->second.first->getType())); 1704 delete I->second.first; 1705 I->second.first = 0; 1706 } 1707} 1708 1709bool LLParser::PerFunctionState::FinishFunction() { 1710 // Check to see if someone took the address of labels in this block. 1711 if (!P.ForwardRefBlockAddresses.empty()) { 1712 ValID FunctionID; 1713 if (!F.getName().empty()) { 1714 FunctionID.Kind = ValID::t_GlobalName; 1715 FunctionID.StrVal = F.getName(); 1716 } else { 1717 FunctionID.Kind = ValID::t_GlobalID; 1718 FunctionID.UIntVal = FunctionNumber; 1719 } 1720 1721 std::map<ValID, std::vector<std::pair<ValID, GlobalValue*> > >::iterator 1722 FRBAI = P.ForwardRefBlockAddresses.find(FunctionID); 1723 if (FRBAI != P.ForwardRefBlockAddresses.end()) { 1724 // Resolve all these references. 1725 if (P.ResolveForwardRefBlockAddresses(&F, FRBAI->second, this)) 1726 return true; 1727 1728 P.ForwardRefBlockAddresses.erase(FRBAI); 1729 } 1730 } 1731 1732 if (!ForwardRefVals.empty()) 1733 return P.Error(ForwardRefVals.begin()->second.second, 1734 "use of undefined value '%" + ForwardRefVals.begin()->first + 1735 "'"); 1736 if (!ForwardRefValIDs.empty()) 1737 return P.Error(ForwardRefValIDs.begin()->second.second, 1738 "use of undefined value '%" + 1739 Twine(ForwardRefValIDs.begin()->first) + "'"); 1740 return false; 1741} 1742 1743 1744/// GetVal - Get a value with the specified name or ID, creating a 1745/// forward reference record if needed. This can return null if the value 1746/// exists but does not have the right type. 1747Value *LLParser::PerFunctionState::GetVal(const std::string &Name, 1748 const Type *Ty, LocTy Loc) { 1749 // Look this name up in the normal function symbol table. 1750 Value *Val = F.getValueSymbolTable().lookup(Name); 1751 1752 // If this is a forward reference for the value, see if we already created a 1753 // forward ref record. 1754 if (Val == 0) { 1755 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1756 I = ForwardRefVals.find(Name); 1757 if (I != ForwardRefVals.end()) 1758 Val = I->second.first; 1759 } 1760 1761 // If we have the value in the symbol table or fwd-ref table, return it. 1762 if (Val) { 1763 if (Val->getType() == Ty) return Val; 1764 if (Ty->isLabelTy()) 1765 P.Error(Loc, "'%" + Name + "' is not a basic block"); 1766 else 1767 P.Error(Loc, "'%" + Name + "' defined with type '" + 1768 getTypeString(Val->getType()) + "'"); 1769 return 0; 1770 } 1771 1772 // Don't make placeholders with invalid type. 1773 if (!Ty->isFirstClassType() && !Ty->isOpaqueTy() && !Ty->isLabelTy()) { 1774 P.Error(Loc, "invalid use of a non-first-class type"); 1775 return 0; 1776 } 1777 1778 // Otherwise, create a new forward reference for this value and remember it. 1779 Value *FwdVal; 1780 if (Ty->isLabelTy()) 1781 FwdVal = BasicBlock::Create(F.getContext(), Name, &F); 1782 else 1783 FwdVal = new Argument(Ty, Name); 1784 1785 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 1786 return FwdVal; 1787} 1788 1789Value *LLParser::PerFunctionState::GetVal(unsigned ID, const Type *Ty, 1790 LocTy Loc) { 1791 // Look this name up in the normal function symbol table. 1792 Value *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 1793 1794 // If this is a forward reference for the value, see if we already created a 1795 // forward ref record. 1796 if (Val == 0) { 1797 std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1798 I = ForwardRefValIDs.find(ID); 1799 if (I != ForwardRefValIDs.end()) 1800 Val = I->second.first; 1801 } 1802 1803 // If we have the value in the symbol table or fwd-ref table, return it. 1804 if (Val) { 1805 if (Val->getType() == Ty) return Val; 1806 if (Ty->isLabelTy()) 1807 P.Error(Loc, "'%" + Twine(ID) + "' is not a basic block"); 1808 else 1809 P.Error(Loc, "'%" + Twine(ID) + "' defined with type '" + 1810 getTypeString(Val->getType()) + "'"); 1811 return 0; 1812 } 1813 1814 if (!Ty->isFirstClassType() && !Ty->isOpaqueTy() && !Ty->isLabelTy()) { 1815 P.Error(Loc, "invalid use of a non-first-class type"); 1816 return 0; 1817 } 1818 1819 // Otherwise, create a new forward reference for this value and remember it. 1820 Value *FwdVal; 1821 if (Ty->isLabelTy()) 1822 FwdVal = BasicBlock::Create(F.getContext(), "", &F); 1823 else 1824 FwdVal = new Argument(Ty); 1825 1826 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 1827 return FwdVal; 1828} 1829 1830/// SetInstName - After an instruction is parsed and inserted into its 1831/// basic block, this installs its name. 1832bool LLParser::PerFunctionState::SetInstName(int NameID, 1833 const std::string &NameStr, 1834 LocTy NameLoc, Instruction *Inst) { 1835 // If this instruction has void type, it cannot have a name or ID specified. 1836 if (Inst->getType()->isVoidTy()) { 1837 if (NameID != -1 || !NameStr.empty()) 1838 return P.Error(NameLoc, "instructions returning void cannot have a name"); 1839 return false; 1840 } 1841 1842 // If this was a numbered instruction, verify that the instruction is the 1843 // expected value and resolve any forward references. 1844 if (NameStr.empty()) { 1845 // If neither a name nor an ID was specified, just use the next ID. 1846 if (NameID == -1) 1847 NameID = NumberedVals.size(); 1848 1849 if (unsigned(NameID) != NumberedVals.size()) 1850 return P.Error(NameLoc, "instruction expected to be numbered '%" + 1851 Twine(NumberedVals.size()) + "'"); 1852 1853 std::map<unsigned, std::pair<Value*, LocTy> >::iterator FI = 1854 ForwardRefValIDs.find(NameID); 1855 if (FI != ForwardRefValIDs.end()) { 1856 if (FI->second.first->getType() != Inst->getType()) 1857 return P.Error(NameLoc, "instruction forward referenced with type '" + 1858 getTypeString(FI->second.first->getType()) + "'"); 1859 FI->second.first->replaceAllUsesWith(Inst); 1860 delete FI->second.first; 1861 ForwardRefValIDs.erase(FI); 1862 } 1863 1864 NumberedVals.push_back(Inst); 1865 return false; 1866 } 1867 1868 // Otherwise, the instruction had a name. Resolve forward refs and set it. 1869 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1870 FI = ForwardRefVals.find(NameStr); 1871 if (FI != ForwardRefVals.end()) { 1872 if (FI->second.first->getType() != Inst->getType()) 1873 return P.Error(NameLoc, "instruction forward referenced with type '" + 1874 getTypeString(FI->second.first->getType()) + "'"); 1875 FI->second.first->replaceAllUsesWith(Inst); 1876 delete FI->second.first; 1877 ForwardRefVals.erase(FI); 1878 } 1879 1880 // Set the name on the instruction. 1881 Inst->setName(NameStr); 1882 1883 if (Inst->getName() != NameStr) 1884 return P.Error(NameLoc, "multiple definition of local value named '" + 1885 NameStr + "'"); 1886 return false; 1887} 1888 1889/// GetBB - Get a basic block with the specified name or ID, creating a 1890/// forward reference record if needed. 1891BasicBlock *LLParser::PerFunctionState::GetBB(const std::string &Name, 1892 LocTy Loc) { 1893 return cast_or_null<BasicBlock>(GetVal(Name, 1894 Type::getLabelTy(F.getContext()), Loc)); 1895} 1896 1897BasicBlock *LLParser::PerFunctionState::GetBB(unsigned ID, LocTy Loc) { 1898 return cast_or_null<BasicBlock>(GetVal(ID, 1899 Type::getLabelTy(F.getContext()), Loc)); 1900} 1901 1902/// DefineBB - Define the specified basic block, which is either named or 1903/// unnamed. If there is an error, this returns null otherwise it returns 1904/// the block being defined. 1905BasicBlock *LLParser::PerFunctionState::DefineBB(const std::string &Name, 1906 LocTy Loc) { 1907 BasicBlock *BB; 1908 if (Name.empty()) 1909 BB = GetBB(NumberedVals.size(), Loc); 1910 else 1911 BB = GetBB(Name, Loc); 1912 if (BB == 0) return 0; // Already diagnosed error. 1913 1914 // Move the block to the end of the function. Forward ref'd blocks are 1915 // inserted wherever they happen to be referenced. 1916 F.getBasicBlockList().splice(F.end(), F.getBasicBlockList(), BB); 1917 1918 // Remove the block from forward ref sets. 1919 if (Name.empty()) { 1920 ForwardRefValIDs.erase(NumberedVals.size()); 1921 NumberedVals.push_back(BB); 1922 } else { 1923 // BB forward references are already in the function symbol table. 1924 ForwardRefVals.erase(Name); 1925 } 1926 1927 return BB; 1928} 1929 1930//===----------------------------------------------------------------------===// 1931// Constants. 1932//===----------------------------------------------------------------------===// 1933 1934/// ParseValID - Parse an abstract value that doesn't necessarily have a 1935/// type implied. For example, if we parse "4" we don't know what integer type 1936/// it has. The value will later be combined with its type and checked for 1937/// sanity. PFS is used to convert function-local operands of metadata (since 1938/// metadata operands are not just parsed here but also converted to values). 1939/// PFS can be null when we are not parsing metadata values inside a function. 1940bool LLParser::ParseValID(ValID &ID, PerFunctionState *PFS) { 1941 ID.Loc = Lex.getLoc(); 1942 switch (Lex.getKind()) { 1943 default: return TokError("expected value token"); 1944 case lltok::GlobalID: // @42 1945 ID.UIntVal = Lex.getUIntVal(); 1946 ID.Kind = ValID::t_GlobalID; 1947 break; 1948 case lltok::GlobalVar: // @foo 1949 ID.StrVal = Lex.getStrVal(); 1950 ID.Kind = ValID::t_GlobalName; 1951 break; 1952 case lltok::LocalVarID: // %42 1953 ID.UIntVal = Lex.getUIntVal(); 1954 ID.Kind = ValID::t_LocalID; 1955 break; 1956 case lltok::LocalVar: // %foo 1957 ID.StrVal = Lex.getStrVal(); 1958 ID.Kind = ValID::t_LocalName; 1959 break; 1960 case lltok::exclaim: // !42, !{...}, or !"foo" 1961 return ParseMetadataValue(ID, PFS); 1962 case lltok::APSInt: 1963 ID.APSIntVal = Lex.getAPSIntVal(); 1964 ID.Kind = ValID::t_APSInt; 1965 break; 1966 case lltok::APFloat: 1967 ID.APFloatVal = Lex.getAPFloatVal(); 1968 ID.Kind = ValID::t_APFloat; 1969 break; 1970 case lltok::kw_true: 1971 ID.ConstantVal = ConstantInt::getTrue(Context); 1972 ID.Kind = ValID::t_Constant; 1973 break; 1974 case lltok::kw_false: 1975 ID.ConstantVal = ConstantInt::getFalse(Context); 1976 ID.Kind = ValID::t_Constant; 1977 break; 1978 case lltok::kw_null: ID.Kind = ValID::t_Null; break; 1979 case lltok::kw_undef: ID.Kind = ValID::t_Undef; break; 1980 case lltok::kw_zeroinitializer: ID.Kind = ValID::t_Zero; break; 1981 1982 case lltok::lbrace: { 1983 // ValID ::= '{' ConstVector '}' 1984 Lex.Lex(); 1985 SmallVector<Constant*, 16> Elts; 1986 if (ParseGlobalValueVector(Elts) || 1987 ParseToken(lltok::rbrace, "expected end of struct constant")) 1988 return true; 1989 1990 // FIXME: Get this type from context instead of reconstructing it! 1991 ID.ConstantVal = ConstantStruct::getAnon(Context, Elts); 1992 ID.Kind = ValID::t_Constant; 1993 return false; 1994 } 1995 case lltok::less: { 1996 // ValID ::= '<' ConstVector '>' --> Vector. 1997 // ValID ::= '<' '{' ConstVector '}' '>' --> Packed Struct. 1998 Lex.Lex(); 1999 bool isPackedStruct = EatIfPresent(lltok::lbrace); 2000 2001 SmallVector<Constant*, 16> Elts; 2002 LocTy FirstEltLoc = Lex.getLoc(); 2003 if (ParseGlobalValueVector(Elts) || 2004 (isPackedStruct && 2005 ParseToken(lltok::rbrace, "expected end of packed struct")) || 2006 ParseToken(lltok::greater, "expected end of constant")) 2007 return true; 2008 2009 if (isPackedStruct) { 2010 // FIXME: Get this type from context instead of reconstructing it! 2011 ID.ConstantVal = ConstantStruct::getAnon(Context, Elts, true); 2012 ID.Kind = ValID::t_Constant; 2013 return false; 2014 } 2015 2016 if (Elts.empty()) 2017 return Error(ID.Loc, "constant vector must not be empty"); 2018 2019 if (!Elts[0]->getType()->isIntegerTy() && 2020 !Elts[0]->getType()->isFloatingPointTy()) 2021 return Error(FirstEltLoc, 2022 "vector elements must have integer or floating point type"); 2023 2024 // Verify that all the vector elements have the same type. 2025 for (unsigned i = 1, e = Elts.size(); i != e; ++i) 2026 if (Elts[i]->getType() != Elts[0]->getType()) 2027 return Error(FirstEltLoc, 2028 "vector element #" + Twine(i) + 2029 " is not of type '" + getTypeString(Elts[0]->getType())); 2030 2031 ID.ConstantVal = ConstantVector::get(Elts); 2032 ID.Kind = ValID::t_Constant; 2033 return false; 2034 } 2035 case lltok::lsquare: { // Array Constant 2036 Lex.Lex(); 2037 SmallVector<Constant*, 16> Elts; 2038 LocTy FirstEltLoc = Lex.getLoc(); 2039 if (ParseGlobalValueVector(Elts) || 2040 ParseToken(lltok::rsquare, "expected end of array constant")) 2041 return true; 2042 2043 // Handle empty element. 2044 if (Elts.empty()) { 2045 // Use undef instead of an array because it's inconvenient to determine 2046 // the element type at this point, there being no elements to examine. 2047 ID.Kind = ValID::t_EmptyArray; 2048 return false; 2049 } 2050 2051 if (!Elts[0]->getType()->isFirstClassType()) 2052 return Error(FirstEltLoc, "invalid array element type: " + 2053 getTypeString(Elts[0]->getType())); 2054 2055 ArrayType *ATy = ArrayType::get(Elts[0]->getType(), Elts.size()); 2056 2057 // Verify all elements are correct type! 2058 for (unsigned i = 0, e = Elts.size(); i != e; ++i) { 2059 if (Elts[i]->getType() != Elts[0]->getType()) 2060 return Error(FirstEltLoc, 2061 "array element #" + Twine(i) + 2062 " is not of type '" + getTypeString(Elts[0]->getType())); 2063 } 2064 2065 ID.ConstantVal = ConstantArray::get(ATy, Elts); 2066 ID.Kind = ValID::t_Constant; 2067 return false; 2068 } 2069 case lltok::kw_c: // c "foo" 2070 Lex.Lex(); 2071 ID.ConstantVal = ConstantArray::get(Context, Lex.getStrVal(), false); 2072 if (ParseToken(lltok::StringConstant, "expected string")) return true; 2073 ID.Kind = ValID::t_Constant; 2074 return false; 2075 2076 case lltok::kw_asm: { 2077 // ValID ::= 'asm' SideEffect? AlignStack? STRINGCONSTANT ',' STRINGCONSTANT 2078 bool HasSideEffect, AlignStack; 2079 Lex.Lex(); 2080 if (ParseOptionalToken(lltok::kw_sideeffect, HasSideEffect) || 2081 ParseOptionalToken(lltok::kw_alignstack, AlignStack) || 2082 ParseStringConstant(ID.StrVal) || 2083 ParseToken(lltok::comma, "expected comma in inline asm expression") || 2084 ParseToken(lltok::StringConstant, "expected constraint string")) 2085 return true; 2086 ID.StrVal2 = Lex.getStrVal(); 2087 ID.UIntVal = unsigned(HasSideEffect) | (unsigned(AlignStack)<<1); 2088 ID.Kind = ValID::t_InlineAsm; 2089 return false; 2090 } 2091 2092 case lltok::kw_blockaddress: { 2093 // ValID ::= 'blockaddress' '(' @foo ',' %bar ')' 2094 Lex.Lex(); 2095 2096 ValID Fn, Label; 2097 LocTy FnLoc, LabelLoc; 2098 2099 if (ParseToken(lltok::lparen, "expected '(' in block address expression") || 2100 ParseValID(Fn) || 2101 ParseToken(lltok::comma, "expected comma in block address expression")|| 2102 ParseValID(Label) || 2103 ParseToken(lltok::rparen, "expected ')' in block address expression")) 2104 return true; 2105 2106 if (Fn.Kind != ValID::t_GlobalID && Fn.Kind != ValID::t_GlobalName) 2107 return Error(Fn.Loc, "expected function name in blockaddress"); 2108 if (Label.Kind != ValID::t_LocalID && Label.Kind != ValID::t_LocalName) 2109 return Error(Label.Loc, "expected basic block name in blockaddress"); 2110 2111 // Make a global variable as a placeholder for this reference. 2112 GlobalVariable *FwdRef = new GlobalVariable(*M, Type::getInt8Ty(Context), 2113 false, GlobalValue::InternalLinkage, 2114 0, ""); 2115 ForwardRefBlockAddresses[Fn].push_back(std::make_pair(Label, FwdRef)); 2116 ID.ConstantVal = FwdRef; 2117 ID.Kind = ValID::t_Constant; 2118 return false; 2119 } 2120 2121 case lltok::kw_trunc: 2122 case lltok::kw_zext: 2123 case lltok::kw_sext: 2124 case lltok::kw_fptrunc: 2125 case lltok::kw_fpext: 2126 case lltok::kw_bitcast: 2127 case lltok::kw_uitofp: 2128 case lltok::kw_sitofp: 2129 case lltok::kw_fptoui: 2130 case lltok::kw_fptosi: 2131 case lltok::kw_inttoptr: 2132 case lltok::kw_ptrtoint: { 2133 unsigned Opc = Lex.getUIntVal(); 2134 PATypeHolder DestTy(Type::getVoidTy(Context)); 2135 Constant *SrcVal; 2136 Lex.Lex(); 2137 if (ParseToken(lltok::lparen, "expected '(' after constantexpr cast") || 2138 ParseGlobalTypeAndValue(SrcVal) || 2139 ParseToken(lltok::kw_to, "expected 'to' in constantexpr cast") || 2140 ParseType(DestTy) || 2141 ParseToken(lltok::rparen, "expected ')' at end of constantexpr cast")) 2142 return true; 2143 if (!CastInst::castIsValid((Instruction::CastOps)Opc, SrcVal, DestTy)) 2144 return Error(ID.Loc, "invalid cast opcode for cast from '" + 2145 getTypeString(SrcVal->getType()) + "' to '" + 2146 getTypeString(DestTy) + "'"); 2147 ID.ConstantVal = ConstantExpr::getCast((Instruction::CastOps)Opc, 2148 SrcVal, DestTy); 2149 ID.Kind = ValID::t_Constant; 2150 return false; 2151 } 2152 case lltok::kw_extractvalue: { 2153 Lex.Lex(); 2154 Constant *Val; 2155 SmallVector<unsigned, 4> Indices; 2156 if (ParseToken(lltok::lparen, "expected '(' in extractvalue constantexpr")|| 2157 ParseGlobalTypeAndValue(Val) || 2158 ParseIndexList(Indices) || 2159 ParseToken(lltok::rparen, "expected ')' in extractvalue constantexpr")) 2160 return true; 2161 2162 if (!Val->getType()->isAggregateType()) 2163 return Error(ID.Loc, "extractvalue operand must be aggregate type"); 2164 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 2165 Indices.end())) 2166 return Error(ID.Loc, "invalid indices for extractvalue"); 2167 ID.ConstantVal = 2168 ConstantExpr::getExtractValue(Val, Indices.data(), Indices.size()); 2169 ID.Kind = ValID::t_Constant; 2170 return false; 2171 } 2172 case lltok::kw_insertvalue: { 2173 Lex.Lex(); 2174 Constant *Val0, *Val1; 2175 SmallVector<unsigned, 4> Indices; 2176 if (ParseToken(lltok::lparen, "expected '(' in insertvalue constantexpr")|| 2177 ParseGlobalTypeAndValue(Val0) || 2178 ParseToken(lltok::comma, "expected comma in insertvalue constantexpr")|| 2179 ParseGlobalTypeAndValue(Val1) || 2180 ParseIndexList(Indices) || 2181 ParseToken(lltok::rparen, "expected ')' in insertvalue constantexpr")) 2182 return true; 2183 if (!Val0->getType()->isAggregateType()) 2184 return Error(ID.Loc, "insertvalue operand must be aggregate type"); 2185 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 2186 Indices.end())) 2187 return Error(ID.Loc, "invalid indices for insertvalue"); 2188 ID.ConstantVal = ConstantExpr::getInsertValue(Val0, Val1, 2189 Indices.data(), Indices.size()); 2190 ID.Kind = ValID::t_Constant; 2191 return false; 2192 } 2193 case lltok::kw_icmp: 2194 case lltok::kw_fcmp: { 2195 unsigned PredVal, Opc = Lex.getUIntVal(); 2196 Constant *Val0, *Val1; 2197 Lex.Lex(); 2198 if (ParseCmpPredicate(PredVal, Opc) || 2199 ParseToken(lltok::lparen, "expected '(' in compare constantexpr") || 2200 ParseGlobalTypeAndValue(Val0) || 2201 ParseToken(lltok::comma, "expected comma in compare constantexpr") || 2202 ParseGlobalTypeAndValue(Val1) || 2203 ParseToken(lltok::rparen, "expected ')' in compare constantexpr")) 2204 return true; 2205 2206 if (Val0->getType() != Val1->getType()) 2207 return Error(ID.Loc, "compare operands must have the same type"); 2208 2209 CmpInst::Predicate Pred = (CmpInst::Predicate)PredVal; 2210 2211 if (Opc == Instruction::FCmp) { 2212 if (!Val0->getType()->isFPOrFPVectorTy()) 2213 return Error(ID.Loc, "fcmp requires floating point operands"); 2214 ID.ConstantVal = ConstantExpr::getFCmp(Pred, Val0, Val1); 2215 } else { 2216 assert(Opc == Instruction::ICmp && "Unexpected opcode for CmpInst!"); 2217 if (!Val0->getType()->isIntOrIntVectorTy() && 2218 !Val0->getType()->isPointerTy()) 2219 return Error(ID.Loc, "icmp requires pointer or integer operands"); 2220 ID.ConstantVal = ConstantExpr::getICmp(Pred, Val0, Val1); 2221 } 2222 ID.Kind = ValID::t_Constant; 2223 return false; 2224 } 2225 2226 // Binary Operators. 2227 case lltok::kw_add: 2228 case lltok::kw_fadd: 2229 case lltok::kw_sub: 2230 case lltok::kw_fsub: 2231 case lltok::kw_mul: 2232 case lltok::kw_fmul: 2233 case lltok::kw_udiv: 2234 case lltok::kw_sdiv: 2235 case lltok::kw_fdiv: 2236 case lltok::kw_urem: 2237 case lltok::kw_srem: 2238 case lltok::kw_frem: 2239 case lltok::kw_shl: 2240 case lltok::kw_lshr: 2241 case lltok::kw_ashr: { 2242 bool NUW = false; 2243 bool NSW = false; 2244 bool Exact = false; 2245 unsigned Opc = Lex.getUIntVal(); 2246 Constant *Val0, *Val1; 2247 Lex.Lex(); 2248 LocTy ModifierLoc = Lex.getLoc(); 2249 if (Opc == Instruction::Add || Opc == Instruction::Sub || 2250 Opc == Instruction::Mul || Opc == Instruction::Shl) { 2251 if (EatIfPresent(lltok::kw_nuw)) 2252 NUW = true; 2253 if (EatIfPresent(lltok::kw_nsw)) { 2254 NSW = true; 2255 if (EatIfPresent(lltok::kw_nuw)) 2256 NUW = true; 2257 } 2258 } else if (Opc == Instruction::SDiv || Opc == Instruction::UDiv || 2259 Opc == Instruction::LShr || Opc == Instruction::AShr) { 2260 if (EatIfPresent(lltok::kw_exact)) 2261 Exact = true; 2262 } 2263 if (ParseToken(lltok::lparen, "expected '(' in binary constantexpr") || 2264 ParseGlobalTypeAndValue(Val0) || 2265 ParseToken(lltok::comma, "expected comma in binary constantexpr") || 2266 ParseGlobalTypeAndValue(Val1) || 2267 ParseToken(lltok::rparen, "expected ')' in binary constantexpr")) 2268 return true; 2269 if (Val0->getType() != Val1->getType()) 2270 return Error(ID.Loc, "operands of constexpr must have same type"); 2271 if (!Val0->getType()->isIntOrIntVectorTy()) { 2272 if (NUW) 2273 return Error(ModifierLoc, "nuw only applies to integer operations"); 2274 if (NSW) 2275 return Error(ModifierLoc, "nsw only applies to integer operations"); 2276 } 2277 // Check that the type is valid for the operator. 2278 switch (Opc) { 2279 case Instruction::Add: 2280 case Instruction::Sub: 2281 case Instruction::Mul: 2282 case Instruction::UDiv: 2283 case Instruction::SDiv: 2284 case Instruction::URem: 2285 case Instruction::SRem: 2286 case Instruction::Shl: 2287 case Instruction::AShr: 2288 case Instruction::LShr: 2289 if (!Val0->getType()->isIntOrIntVectorTy()) 2290 return Error(ID.Loc, "constexpr requires integer operands"); 2291 break; 2292 case Instruction::FAdd: 2293 case Instruction::FSub: 2294 case Instruction::FMul: 2295 case Instruction::FDiv: 2296 case Instruction::FRem: 2297 if (!Val0->getType()->isFPOrFPVectorTy()) 2298 return Error(ID.Loc, "constexpr requires fp operands"); 2299 break; 2300 default: llvm_unreachable("Unknown binary operator!"); 2301 } 2302 unsigned Flags = 0; 2303 if (NUW) Flags |= OverflowingBinaryOperator::NoUnsignedWrap; 2304 if (NSW) Flags |= OverflowingBinaryOperator::NoSignedWrap; 2305 if (Exact) Flags |= PossiblyExactOperator::IsExact; 2306 Constant *C = ConstantExpr::get(Opc, Val0, Val1, Flags); 2307 ID.ConstantVal = C; 2308 ID.Kind = ValID::t_Constant; 2309 return false; 2310 } 2311 2312 // Logical Operations 2313 case lltok::kw_and: 2314 case lltok::kw_or: 2315 case lltok::kw_xor: { 2316 unsigned Opc = Lex.getUIntVal(); 2317 Constant *Val0, *Val1; 2318 Lex.Lex(); 2319 if (ParseToken(lltok::lparen, "expected '(' in logical constantexpr") || 2320 ParseGlobalTypeAndValue(Val0) || 2321 ParseToken(lltok::comma, "expected comma in logical constantexpr") || 2322 ParseGlobalTypeAndValue(Val1) || 2323 ParseToken(lltok::rparen, "expected ')' in logical constantexpr")) 2324 return true; 2325 if (Val0->getType() != Val1->getType()) 2326 return Error(ID.Loc, "operands of constexpr must have same type"); 2327 if (!Val0->getType()->isIntOrIntVectorTy()) 2328 return Error(ID.Loc, 2329 "constexpr requires integer or integer vector operands"); 2330 ID.ConstantVal = ConstantExpr::get(Opc, Val0, Val1); 2331 ID.Kind = ValID::t_Constant; 2332 return false; 2333 } 2334 2335 case lltok::kw_getelementptr: 2336 case lltok::kw_shufflevector: 2337 case lltok::kw_insertelement: 2338 case lltok::kw_extractelement: 2339 case lltok::kw_select: { 2340 unsigned Opc = Lex.getUIntVal(); 2341 SmallVector<Constant*, 16> Elts; 2342 bool InBounds = false; 2343 Lex.Lex(); 2344 if (Opc == Instruction::GetElementPtr) 2345 InBounds = EatIfPresent(lltok::kw_inbounds); 2346 if (ParseToken(lltok::lparen, "expected '(' in constantexpr") || 2347 ParseGlobalValueVector(Elts) || 2348 ParseToken(lltok::rparen, "expected ')' in constantexpr")) 2349 return true; 2350 2351 if (Opc == Instruction::GetElementPtr) { 2352 if (Elts.size() == 0 || !Elts[0]->getType()->isPointerTy()) 2353 return Error(ID.Loc, "getelementptr requires pointer operand"); 2354 2355 if (!GetElementPtrInst::getIndexedType(Elts[0]->getType(), 2356 (Value**)(Elts.data() + 1), 2357 Elts.size() - 1)) 2358 return Error(ID.Loc, "invalid indices for getelementptr"); 2359 ID.ConstantVal = InBounds ? 2360 ConstantExpr::getInBoundsGetElementPtr(Elts[0], 2361 Elts.data() + 1, 2362 Elts.size() - 1) : 2363 ConstantExpr::getGetElementPtr(Elts[0], 2364 Elts.data() + 1, Elts.size() - 1); 2365 } else if (Opc == Instruction::Select) { 2366 if (Elts.size() != 3) 2367 return Error(ID.Loc, "expected three operands to select"); 2368 if (const char *Reason = SelectInst::areInvalidOperands(Elts[0], Elts[1], 2369 Elts[2])) 2370 return Error(ID.Loc, Reason); 2371 ID.ConstantVal = ConstantExpr::getSelect(Elts[0], Elts[1], Elts[2]); 2372 } else if (Opc == Instruction::ShuffleVector) { 2373 if (Elts.size() != 3) 2374 return Error(ID.Loc, "expected three operands to shufflevector"); 2375 if (!ShuffleVectorInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2376 return Error(ID.Loc, "invalid operands to shufflevector"); 2377 ID.ConstantVal = 2378 ConstantExpr::getShuffleVector(Elts[0], Elts[1],Elts[2]); 2379 } else if (Opc == Instruction::ExtractElement) { 2380 if (Elts.size() != 2) 2381 return Error(ID.Loc, "expected two operands to extractelement"); 2382 if (!ExtractElementInst::isValidOperands(Elts[0], Elts[1])) 2383 return Error(ID.Loc, "invalid extractelement operands"); 2384 ID.ConstantVal = ConstantExpr::getExtractElement(Elts[0], Elts[1]); 2385 } else { 2386 assert(Opc == Instruction::InsertElement && "Unknown opcode"); 2387 if (Elts.size() != 3) 2388 return Error(ID.Loc, "expected three operands to insertelement"); 2389 if (!InsertElementInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2390 return Error(ID.Loc, "invalid insertelement operands"); 2391 ID.ConstantVal = 2392 ConstantExpr::getInsertElement(Elts[0], Elts[1],Elts[2]); 2393 } 2394 2395 ID.Kind = ValID::t_Constant; 2396 return false; 2397 } 2398 } 2399 2400 Lex.Lex(); 2401 return false; 2402} 2403 2404/// ParseGlobalValue - Parse a global value with the specified type. 2405bool LLParser::ParseGlobalValue(const Type *Ty, Constant *&C) { 2406 C = 0; 2407 ValID ID; 2408 Value *V = NULL; 2409 bool Parsed = ParseValID(ID) || 2410 ConvertValIDToValue(Ty, ID, V, NULL); 2411 if (V && !(C = dyn_cast<Constant>(V))) 2412 return Error(ID.Loc, "global values must be constants"); 2413 return Parsed; 2414} 2415 2416bool LLParser::ParseGlobalTypeAndValue(Constant *&V) { 2417 PATypeHolder Type(Type::getVoidTy(Context)); 2418 return ParseType(Type) || 2419 ParseGlobalValue(Type, V); 2420} 2421 2422/// ParseGlobalValueVector 2423/// ::= /*empty*/ 2424/// ::= TypeAndValue (',' TypeAndValue)* 2425bool LLParser::ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts) { 2426 // Empty list. 2427 if (Lex.getKind() == lltok::rbrace || 2428 Lex.getKind() == lltok::rsquare || 2429 Lex.getKind() == lltok::greater || 2430 Lex.getKind() == lltok::rparen) 2431 return false; 2432 2433 Constant *C; 2434 if (ParseGlobalTypeAndValue(C)) return true; 2435 Elts.push_back(C); 2436 2437 while (EatIfPresent(lltok::comma)) { 2438 if (ParseGlobalTypeAndValue(C)) return true; 2439 Elts.push_back(C); 2440 } 2441 2442 return false; 2443} 2444 2445bool LLParser::ParseMetadataListValue(ValID &ID, PerFunctionState *PFS) { 2446 assert(Lex.getKind() == lltok::lbrace); 2447 Lex.Lex(); 2448 2449 SmallVector<Value*, 16> Elts; 2450 if (ParseMDNodeVector(Elts, PFS) || 2451 ParseToken(lltok::rbrace, "expected end of metadata node")) 2452 return true; 2453 2454 ID.MDNodeVal = MDNode::get(Context, Elts); 2455 ID.Kind = ValID::t_MDNode; 2456 return false; 2457} 2458 2459/// ParseMetadataValue 2460/// ::= !42 2461/// ::= !{...} 2462/// ::= !"string" 2463bool LLParser::ParseMetadataValue(ValID &ID, PerFunctionState *PFS) { 2464 assert(Lex.getKind() == lltok::exclaim); 2465 Lex.Lex(); 2466 2467 // MDNode: 2468 // !{ ... } 2469 if (Lex.getKind() == lltok::lbrace) 2470 return ParseMetadataListValue(ID, PFS); 2471 2472 // Standalone metadata reference 2473 // !42 2474 if (Lex.getKind() == lltok::APSInt) { 2475 if (ParseMDNodeID(ID.MDNodeVal)) return true; 2476 ID.Kind = ValID::t_MDNode; 2477 return false; 2478 } 2479 2480 // MDString: 2481 // ::= '!' STRINGCONSTANT 2482 if (ParseMDString(ID.MDStringVal)) return true; 2483 ID.Kind = ValID::t_MDString; 2484 return false; 2485} 2486 2487 2488//===----------------------------------------------------------------------===// 2489// Function Parsing. 2490//===----------------------------------------------------------------------===// 2491 2492bool LLParser::ConvertValIDToValue(const Type *Ty, ValID &ID, Value *&V, 2493 PerFunctionState *PFS) { 2494 if (Ty->isFunctionTy()) 2495 return Error(ID.Loc, "functions are not values, refer to them as pointers"); 2496 2497 switch (ID.Kind) { 2498 default: llvm_unreachable("Unknown ValID!"); 2499 case ValID::t_LocalID: 2500 if (!PFS) return Error(ID.Loc, "invalid use of function-local name"); 2501 V = PFS->GetVal(ID.UIntVal, Ty, ID.Loc); 2502 return (V == 0); 2503 case ValID::t_LocalName: 2504 if (!PFS) return Error(ID.Loc, "invalid use of function-local name"); 2505 V = PFS->GetVal(ID.StrVal, Ty, ID.Loc); 2506 return (V == 0); 2507 case ValID::t_InlineAsm: { 2508 const PointerType *PTy = dyn_cast<PointerType>(Ty); 2509 const FunctionType *FTy = 2510 PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : 0; 2511 if (!FTy || !InlineAsm::Verify(FTy, ID.StrVal2)) 2512 return Error(ID.Loc, "invalid type for inline asm constraint string"); 2513 V = InlineAsm::get(FTy, ID.StrVal, ID.StrVal2, ID.UIntVal&1, ID.UIntVal>>1); 2514 return false; 2515 } 2516 case ValID::t_MDNode: 2517 if (!Ty->isMetadataTy()) 2518 return Error(ID.Loc, "metadata value must have metadata type"); 2519 V = ID.MDNodeVal; 2520 return false; 2521 case ValID::t_MDString: 2522 if (!Ty->isMetadataTy()) 2523 return Error(ID.Loc, "metadata value must have metadata type"); 2524 V = ID.MDStringVal; 2525 return false; 2526 case ValID::t_GlobalName: 2527 V = GetGlobalVal(ID.StrVal, Ty, ID.Loc); 2528 return V == 0; 2529 case ValID::t_GlobalID: 2530 V = GetGlobalVal(ID.UIntVal, Ty, ID.Loc); 2531 return V == 0; 2532 case ValID::t_APSInt: 2533 if (!Ty->isIntegerTy()) 2534 return Error(ID.Loc, "integer constant must have integer type"); 2535 ID.APSIntVal = ID.APSIntVal.extOrTrunc(Ty->getPrimitiveSizeInBits()); 2536 V = ConstantInt::get(Context, ID.APSIntVal); 2537 return false; 2538 case ValID::t_APFloat: 2539 if (!Ty->isFloatingPointTy() || 2540 !ConstantFP::isValueValidForType(Ty, ID.APFloatVal)) 2541 return Error(ID.Loc, "floating point constant invalid for type"); 2542 2543 // The lexer has no type info, so builds all float and double FP constants 2544 // as double. Fix this here. Long double does not need this. 2545 if (&ID.APFloatVal.getSemantics() == &APFloat::IEEEdouble && 2546 Ty->isFloatTy()) { 2547 bool Ignored; 2548 ID.APFloatVal.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, 2549 &Ignored); 2550 } 2551 V = ConstantFP::get(Context, ID.APFloatVal); 2552 2553 if (V->getType() != Ty) 2554 return Error(ID.Loc, "floating point constant does not have type '" + 2555 getTypeString(Ty) + "'"); 2556 2557 return false; 2558 case ValID::t_Null: 2559 if (!Ty->isPointerTy()) 2560 return Error(ID.Loc, "null must be a pointer type"); 2561 V = ConstantPointerNull::get(cast<PointerType>(Ty)); 2562 return false; 2563 case ValID::t_Undef: 2564 // FIXME: LabelTy should not be a first-class type. 2565 if ((!Ty->isFirstClassType() || Ty->isLabelTy()) && 2566 !Ty->isOpaqueTy()) 2567 return Error(ID.Loc, "invalid type for undef constant"); 2568 V = UndefValue::get(Ty); 2569 return false; 2570 case ValID::t_EmptyArray: 2571 if (!Ty->isArrayTy() || cast<ArrayType>(Ty)->getNumElements() != 0) 2572 return Error(ID.Loc, "invalid empty array initializer"); 2573 V = UndefValue::get(Ty); 2574 return false; 2575 case ValID::t_Zero: 2576 // FIXME: LabelTy should not be a first-class type. 2577 if (!Ty->isFirstClassType() || Ty->isLabelTy()) 2578 return Error(ID.Loc, "invalid type for null constant"); 2579 V = Constant::getNullValue(Ty); 2580 return false; 2581 case ValID::t_Constant: 2582 if (ID.ConstantVal->getType() != Ty) 2583 return Error(ID.Loc, "constant expression type mismatch"); 2584 2585 V = ID.ConstantVal; 2586 return false; 2587 } 2588} 2589 2590bool LLParser::ParseValue(const Type *Ty, Value *&V, PerFunctionState &PFS) { 2591 V = 0; 2592 ValID ID; 2593 return ParseValID(ID, &PFS) || 2594 ConvertValIDToValue(Ty, ID, V, &PFS); 2595} 2596 2597bool LLParser::ParseTypeAndValue(Value *&V, PerFunctionState &PFS) { 2598 PATypeHolder T(Type::getVoidTy(Context)); 2599 return ParseType(T) || 2600 ParseValue(T, V, PFS); 2601} 2602 2603bool LLParser::ParseTypeAndBasicBlock(BasicBlock *&BB, LocTy &Loc, 2604 PerFunctionState &PFS) { 2605 Value *V; 2606 Loc = Lex.getLoc(); 2607 if (ParseTypeAndValue(V, PFS)) return true; 2608 if (!isa<BasicBlock>(V)) 2609 return Error(Loc, "expected a basic block"); 2610 BB = cast<BasicBlock>(V); 2611 return false; 2612} 2613 2614 2615/// FunctionHeader 2616/// ::= OptionalLinkage OptionalVisibility OptionalCallingConv OptRetAttrs 2617/// OptUnnamedAddr Type GlobalName '(' ArgList ')' OptFuncAttrs OptSection 2618/// OptionalAlign OptGC 2619bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) { 2620 // Parse the linkage. 2621 LocTy LinkageLoc = Lex.getLoc(); 2622 unsigned Linkage; 2623 2624 unsigned Visibility, RetAttrs; 2625 CallingConv::ID CC; 2626 PATypeHolder RetType(Type::getVoidTy(Context)); 2627 LocTy RetTypeLoc = Lex.getLoc(); 2628 if (ParseOptionalLinkage(Linkage) || 2629 ParseOptionalVisibility(Visibility) || 2630 ParseOptionalCallingConv(CC) || 2631 ParseOptionalAttrs(RetAttrs, 1) || 2632 ParseType(RetType, RetTypeLoc, true /*void allowed*/)) 2633 return true; 2634 2635 // Verify that the linkage is ok. 2636 switch ((GlobalValue::LinkageTypes)Linkage) { 2637 case GlobalValue::ExternalLinkage: 2638 break; // always ok. 2639 case GlobalValue::DLLImportLinkage: 2640 case GlobalValue::ExternalWeakLinkage: 2641 if (isDefine) 2642 return Error(LinkageLoc, "invalid linkage for function definition"); 2643 break; 2644 case GlobalValue::PrivateLinkage: 2645 case GlobalValue::LinkerPrivateLinkage: 2646 case GlobalValue::LinkerPrivateWeakLinkage: 2647 case GlobalValue::LinkerPrivateWeakDefAutoLinkage: 2648 case GlobalValue::InternalLinkage: 2649 case GlobalValue::AvailableExternallyLinkage: 2650 case GlobalValue::LinkOnceAnyLinkage: 2651 case GlobalValue::LinkOnceODRLinkage: 2652 case GlobalValue::WeakAnyLinkage: 2653 case GlobalValue::WeakODRLinkage: 2654 case GlobalValue::DLLExportLinkage: 2655 if (!isDefine) 2656 return Error(LinkageLoc, "invalid linkage for function declaration"); 2657 break; 2658 case GlobalValue::AppendingLinkage: 2659 case GlobalValue::CommonLinkage: 2660 return Error(LinkageLoc, "invalid function linkage type"); 2661 } 2662 2663 if (!FunctionType::isValidReturnType(RetType) || 2664 RetType->isOpaqueTy()) 2665 return Error(RetTypeLoc, "invalid function return type"); 2666 2667 LocTy NameLoc = Lex.getLoc(); 2668 2669 std::string FunctionName; 2670 if (Lex.getKind() == lltok::GlobalVar) { 2671 FunctionName = Lex.getStrVal(); 2672 } else if (Lex.getKind() == lltok::GlobalID) { // @42 is ok. 2673 unsigned NameID = Lex.getUIntVal(); 2674 2675 if (NameID != NumberedVals.size()) 2676 return TokError("function expected to be numbered '%" + 2677 Twine(NumberedVals.size()) + "'"); 2678 } else { 2679 return TokError("expected function name"); 2680 } 2681 2682 Lex.Lex(); 2683 2684 if (Lex.getKind() != lltok::lparen) 2685 return TokError("expected '(' in function argument list"); 2686 2687 std::vector<ArgInfo> ArgList; 2688 bool isVarArg; 2689 unsigned FuncAttrs; 2690 std::string Section; 2691 unsigned Alignment; 2692 std::string GC; 2693 bool UnnamedAddr; 2694 LocTy UnnamedAddrLoc; 2695 2696 if (ParseArgumentList(ArgList, isVarArg, false) || 2697 ParseOptionalToken(lltok::kw_unnamed_addr, UnnamedAddr, 2698 &UnnamedAddrLoc) || 2699 ParseOptionalAttrs(FuncAttrs, 2) || 2700 (EatIfPresent(lltok::kw_section) && 2701 ParseStringConstant(Section)) || 2702 ParseOptionalAlignment(Alignment) || 2703 (EatIfPresent(lltok::kw_gc) && 2704 ParseStringConstant(GC))) 2705 return true; 2706 2707 // If the alignment was parsed as an attribute, move to the alignment field. 2708 if (FuncAttrs & Attribute::Alignment) { 2709 Alignment = Attribute::getAlignmentFromAttrs(FuncAttrs); 2710 FuncAttrs &= ~Attribute::Alignment; 2711 } 2712 2713 // Okay, if we got here, the function is syntactically valid. Convert types 2714 // and do semantic checks. 2715 std::vector<const Type*> ParamTypeList; 2716 SmallVector<AttributeWithIndex, 8> Attrs; 2717 2718 if (RetAttrs != Attribute::None) 2719 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 2720 2721 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 2722 ParamTypeList.push_back(ArgList[i].Type); 2723 if (ArgList[i].Attrs != Attribute::None) 2724 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 2725 } 2726 2727 if (FuncAttrs != Attribute::None) 2728 Attrs.push_back(AttributeWithIndex::get(~0, FuncAttrs)); 2729 2730 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 2731 2732 if (PAL.paramHasAttr(1, Attribute::StructRet) && !RetType->isVoidTy()) 2733 return Error(RetTypeLoc, "functions with 'sret' argument must return void"); 2734 2735 const FunctionType *FT = 2736 FunctionType::get(RetType, ParamTypeList, isVarArg); 2737 const PointerType *PFT = PointerType::getUnqual(FT); 2738 2739 Fn = 0; 2740 if (!FunctionName.empty()) { 2741 // If this was a definition of a forward reference, remove the definition 2742 // from the forward reference table and fill in the forward ref. 2743 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator FRVI = 2744 ForwardRefVals.find(FunctionName); 2745 if (FRVI != ForwardRefVals.end()) { 2746 Fn = M->getFunction(FunctionName); 2747 if (Fn->getType() != PFT) 2748 return Error(FRVI->second.second, "invalid forward reference to " 2749 "function '" + FunctionName + "' with wrong type!"); 2750 2751 ForwardRefVals.erase(FRVI); 2752 } else if ((Fn = M->getFunction(FunctionName))) { 2753 // Reject redefinitions. 2754 return Error(NameLoc, "invalid redefinition of function '" + 2755 FunctionName + "'"); 2756 } else if (M->getNamedValue(FunctionName)) { 2757 return Error(NameLoc, "redefinition of function '@" + FunctionName + "'"); 2758 } 2759 2760 } else { 2761 // If this is a definition of a forward referenced function, make sure the 2762 // types agree. 2763 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator I 2764 = ForwardRefValIDs.find(NumberedVals.size()); 2765 if (I != ForwardRefValIDs.end()) { 2766 Fn = cast<Function>(I->second.first); 2767 if (Fn->getType() != PFT) 2768 return Error(NameLoc, "type of definition and forward reference of '@" + 2769 Twine(NumberedVals.size()) + "' disagree"); 2770 ForwardRefValIDs.erase(I); 2771 } 2772 } 2773 2774 if (Fn == 0) 2775 Fn = Function::Create(FT, GlobalValue::ExternalLinkage, FunctionName, M); 2776 else // Move the forward-reference to the correct spot in the module. 2777 M->getFunctionList().splice(M->end(), M->getFunctionList(), Fn); 2778 2779 if (FunctionName.empty()) 2780 NumberedVals.push_back(Fn); 2781 2782 Fn->setLinkage((GlobalValue::LinkageTypes)Linkage); 2783 Fn->setVisibility((GlobalValue::VisibilityTypes)Visibility); 2784 Fn->setCallingConv(CC); 2785 Fn->setAttributes(PAL); 2786 Fn->setUnnamedAddr(UnnamedAddr); 2787 Fn->setAlignment(Alignment); 2788 Fn->setSection(Section); 2789 if (!GC.empty()) Fn->setGC(GC.c_str()); 2790 2791 // Add all of the arguments we parsed to the function. 2792 Function::arg_iterator ArgIt = Fn->arg_begin(); 2793 for (unsigned i = 0, e = ArgList.size(); i != e; ++i, ++ArgIt) { 2794 // If the argument has a name, insert it into the argument symbol table. 2795 if (ArgList[i].Name.empty()) continue; 2796 2797 // Set the name, if it conflicted, it will be auto-renamed. 2798 ArgIt->setName(ArgList[i].Name); 2799 2800 if (ArgIt->getName() != ArgList[i].Name) 2801 return Error(ArgList[i].Loc, "redefinition of argument '%" + 2802 ArgList[i].Name + "'"); 2803 } 2804 2805 return false; 2806} 2807 2808 2809/// ParseFunctionBody 2810/// ::= '{' BasicBlock+ '}' 2811/// 2812bool LLParser::ParseFunctionBody(Function &Fn) { 2813 if (Lex.getKind() != lltok::lbrace) 2814 return TokError("expected '{' in function body"); 2815 Lex.Lex(); // eat the {. 2816 2817 int FunctionNumber = -1; 2818 if (!Fn.hasName()) FunctionNumber = NumberedVals.size()-1; 2819 2820 PerFunctionState PFS(*this, Fn, FunctionNumber); 2821 2822 // We need at least one basic block. 2823 if (Lex.getKind() == lltok::rbrace) 2824 return TokError("function body requires at least one basic block"); 2825 2826 while (Lex.getKind() != lltok::rbrace) 2827 if (ParseBasicBlock(PFS)) return true; 2828 2829 // Eat the }. 2830 Lex.Lex(); 2831 2832 // Verify function is ok. 2833 return PFS.FinishFunction(); 2834} 2835 2836/// ParseBasicBlock 2837/// ::= LabelStr? Instruction* 2838bool LLParser::ParseBasicBlock(PerFunctionState &PFS) { 2839 // If this basic block starts out with a name, remember it. 2840 std::string Name; 2841 LocTy NameLoc = Lex.getLoc(); 2842 if (Lex.getKind() == lltok::LabelStr) { 2843 Name = Lex.getStrVal(); 2844 Lex.Lex(); 2845 } 2846 2847 BasicBlock *BB = PFS.DefineBB(Name, NameLoc); 2848 if (BB == 0) return true; 2849 2850 std::string NameStr; 2851 2852 // Parse the instructions in this block until we get a terminator. 2853 Instruction *Inst; 2854 SmallVector<std::pair<unsigned, MDNode *>, 4> MetadataOnInst; 2855 do { 2856 // This instruction may have three possibilities for a name: a) none 2857 // specified, b) name specified "%foo =", c) number specified: "%4 =". 2858 LocTy NameLoc = Lex.getLoc(); 2859 int NameID = -1; 2860 NameStr = ""; 2861 2862 if (Lex.getKind() == lltok::LocalVarID) { 2863 NameID = Lex.getUIntVal(); 2864 Lex.Lex(); 2865 if (ParseToken(lltok::equal, "expected '=' after instruction id")) 2866 return true; 2867 } else if (Lex.getKind() == lltok::LocalVar) { 2868 NameStr = Lex.getStrVal(); 2869 Lex.Lex(); 2870 if (ParseToken(lltok::equal, "expected '=' after instruction name")) 2871 return true; 2872 } 2873 2874 switch (ParseInstruction(Inst, BB, PFS)) { 2875 default: assert(0 && "Unknown ParseInstruction result!"); 2876 case InstError: return true; 2877 case InstNormal: 2878 BB->getInstList().push_back(Inst); 2879 2880 // With a normal result, we check to see if the instruction is followed by 2881 // a comma and metadata. 2882 if (EatIfPresent(lltok::comma)) 2883 if (ParseInstructionMetadata(Inst, &PFS)) 2884 return true; 2885 break; 2886 case InstExtraComma: 2887 BB->getInstList().push_back(Inst); 2888 2889 // If the instruction parser ate an extra comma at the end of it, it 2890 // *must* be followed by metadata. 2891 if (ParseInstructionMetadata(Inst, &PFS)) 2892 return true; 2893 break; 2894 } 2895 2896 // Set the name on the instruction. 2897 if (PFS.SetInstName(NameID, NameStr, NameLoc, Inst)) return true; 2898 } while (!isa<TerminatorInst>(Inst)); 2899 2900 return false; 2901} 2902 2903//===----------------------------------------------------------------------===// 2904// Instruction Parsing. 2905//===----------------------------------------------------------------------===// 2906 2907/// ParseInstruction - Parse one of the many different instructions. 2908/// 2909int LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB, 2910 PerFunctionState &PFS) { 2911 lltok::Kind Token = Lex.getKind(); 2912 if (Token == lltok::Eof) 2913 return TokError("found end of file when expecting more instructions"); 2914 LocTy Loc = Lex.getLoc(); 2915 unsigned KeywordVal = Lex.getUIntVal(); 2916 Lex.Lex(); // Eat the keyword. 2917 2918 switch (Token) { 2919 default: return Error(Loc, "expected instruction opcode"); 2920 // Terminator Instructions. 2921 case lltok::kw_unwind: Inst = new UnwindInst(Context); return false; 2922 case lltok::kw_unreachable: Inst = new UnreachableInst(Context); return false; 2923 case lltok::kw_ret: return ParseRet(Inst, BB, PFS); 2924 case lltok::kw_br: return ParseBr(Inst, PFS); 2925 case lltok::kw_switch: return ParseSwitch(Inst, PFS); 2926 case lltok::kw_indirectbr: return ParseIndirectBr(Inst, PFS); 2927 case lltok::kw_invoke: return ParseInvoke(Inst, PFS); 2928 // Binary Operators. 2929 case lltok::kw_add: 2930 case lltok::kw_sub: 2931 case lltok::kw_mul: 2932 case lltok::kw_shl: { 2933 bool NUW = EatIfPresent(lltok::kw_nuw); 2934 bool NSW = EatIfPresent(lltok::kw_nsw); 2935 if (!NUW) NUW = EatIfPresent(lltok::kw_nuw); 2936 2937 if (ParseArithmetic(Inst, PFS, KeywordVal, 1)) return true; 2938 2939 if (NUW) cast<BinaryOperator>(Inst)->setHasNoUnsignedWrap(true); 2940 if (NSW) cast<BinaryOperator>(Inst)->setHasNoSignedWrap(true); 2941 return false; 2942 } 2943 case lltok::kw_fadd: 2944 case lltok::kw_fsub: 2945 case lltok::kw_fmul: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2946 2947 case lltok::kw_sdiv: 2948 case lltok::kw_udiv: 2949 case lltok::kw_lshr: 2950 case lltok::kw_ashr: { 2951 bool Exact = EatIfPresent(lltok::kw_exact); 2952 2953 if (ParseArithmetic(Inst, PFS, KeywordVal, 1)) return true; 2954 if (Exact) cast<BinaryOperator>(Inst)->setIsExact(true); 2955 return false; 2956 } 2957 2958 case lltok::kw_urem: 2959 case lltok::kw_srem: return ParseArithmetic(Inst, PFS, KeywordVal, 1); 2960 case lltok::kw_fdiv: 2961 case lltok::kw_frem: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2962 case lltok::kw_and: 2963 case lltok::kw_or: 2964 case lltok::kw_xor: return ParseLogical(Inst, PFS, KeywordVal); 2965 case lltok::kw_icmp: 2966 case lltok::kw_fcmp: return ParseCompare(Inst, PFS, KeywordVal); 2967 // Casts. 2968 case lltok::kw_trunc: 2969 case lltok::kw_zext: 2970 case lltok::kw_sext: 2971 case lltok::kw_fptrunc: 2972 case lltok::kw_fpext: 2973 case lltok::kw_bitcast: 2974 case lltok::kw_uitofp: 2975 case lltok::kw_sitofp: 2976 case lltok::kw_fptoui: 2977 case lltok::kw_fptosi: 2978 case lltok::kw_inttoptr: 2979 case lltok::kw_ptrtoint: return ParseCast(Inst, PFS, KeywordVal); 2980 // Other. 2981 case lltok::kw_select: return ParseSelect(Inst, PFS); 2982 case lltok::kw_va_arg: return ParseVA_Arg(Inst, PFS); 2983 case lltok::kw_extractelement: return ParseExtractElement(Inst, PFS); 2984 case lltok::kw_insertelement: return ParseInsertElement(Inst, PFS); 2985 case lltok::kw_shufflevector: return ParseShuffleVector(Inst, PFS); 2986 case lltok::kw_phi: return ParsePHI(Inst, PFS); 2987 case lltok::kw_call: return ParseCall(Inst, PFS, false); 2988 case lltok::kw_tail: return ParseCall(Inst, PFS, true); 2989 // Memory. 2990 case lltok::kw_alloca: return ParseAlloc(Inst, PFS); 2991 case lltok::kw_load: return ParseLoad(Inst, PFS, false); 2992 case lltok::kw_store: return ParseStore(Inst, PFS, false); 2993 case lltok::kw_volatile: 2994 if (EatIfPresent(lltok::kw_load)) 2995 return ParseLoad(Inst, PFS, true); 2996 else if (EatIfPresent(lltok::kw_store)) 2997 return ParseStore(Inst, PFS, true); 2998 else 2999 return TokError("expected 'load' or 'store'"); 3000 case lltok::kw_getelementptr: return ParseGetElementPtr(Inst, PFS); 3001 case lltok::kw_extractvalue: return ParseExtractValue(Inst, PFS); 3002 case lltok::kw_insertvalue: return ParseInsertValue(Inst, PFS); 3003 } 3004} 3005 3006/// ParseCmpPredicate - Parse an integer or fp predicate, based on Kind. 3007bool LLParser::ParseCmpPredicate(unsigned &P, unsigned Opc) { 3008 if (Opc == Instruction::FCmp) { 3009 switch (Lex.getKind()) { 3010 default: TokError("expected fcmp predicate (e.g. 'oeq')"); 3011 case lltok::kw_oeq: P = CmpInst::FCMP_OEQ; break; 3012 case lltok::kw_one: P = CmpInst::FCMP_ONE; break; 3013 case lltok::kw_olt: P = CmpInst::FCMP_OLT; break; 3014 case lltok::kw_ogt: P = CmpInst::FCMP_OGT; break; 3015 case lltok::kw_ole: P = CmpInst::FCMP_OLE; break; 3016 case lltok::kw_oge: P = CmpInst::FCMP_OGE; break; 3017 case lltok::kw_ord: P = CmpInst::FCMP_ORD; break; 3018 case lltok::kw_uno: P = CmpInst::FCMP_UNO; break; 3019 case lltok::kw_ueq: P = CmpInst::FCMP_UEQ; break; 3020 case lltok::kw_une: P = CmpInst::FCMP_UNE; break; 3021 case lltok::kw_ult: P = CmpInst::FCMP_ULT; break; 3022 case lltok::kw_ugt: P = CmpInst::FCMP_UGT; break; 3023 case lltok::kw_ule: P = CmpInst::FCMP_ULE; break; 3024 case lltok::kw_uge: P = CmpInst::FCMP_UGE; break; 3025 case lltok::kw_true: P = CmpInst::FCMP_TRUE; break; 3026 case lltok::kw_false: P = CmpInst::FCMP_FALSE; break; 3027 } 3028 } else { 3029 switch (Lex.getKind()) { 3030 default: TokError("expected icmp predicate (e.g. 'eq')"); 3031 case lltok::kw_eq: P = CmpInst::ICMP_EQ; break; 3032 case lltok::kw_ne: P = CmpInst::ICMP_NE; break; 3033 case lltok::kw_slt: P = CmpInst::ICMP_SLT; break; 3034 case lltok::kw_sgt: P = CmpInst::ICMP_SGT; break; 3035 case lltok::kw_sle: P = CmpInst::ICMP_SLE; break; 3036 case lltok::kw_sge: P = CmpInst::ICMP_SGE; break; 3037 case lltok::kw_ult: P = CmpInst::ICMP_ULT; break; 3038 case lltok::kw_ugt: P = CmpInst::ICMP_UGT; break; 3039 case lltok::kw_ule: P = CmpInst::ICMP_ULE; break; 3040 case lltok::kw_uge: P = CmpInst::ICMP_UGE; break; 3041 } 3042 } 3043 Lex.Lex(); 3044 return false; 3045} 3046 3047//===----------------------------------------------------------------------===// 3048// Terminator Instructions. 3049//===----------------------------------------------------------------------===// 3050 3051/// ParseRet - Parse a return instruction. 3052/// ::= 'ret' void (',' !dbg, !1)* 3053/// ::= 'ret' TypeAndValue (',' !dbg, !1)* 3054bool LLParser::ParseRet(Instruction *&Inst, BasicBlock *BB, 3055 PerFunctionState &PFS) { 3056 PATypeHolder Ty(Type::getVoidTy(Context)); 3057 if (ParseType(Ty, true /*void allowed*/)) return true; 3058 3059 if (Ty->isVoidTy()) { 3060 Inst = ReturnInst::Create(Context); 3061 return false; 3062 } 3063 3064 Value *RV; 3065 if (ParseValue(Ty, RV, PFS)) return true; 3066 3067 Inst = ReturnInst::Create(Context, RV); 3068 return false; 3069} 3070 3071 3072/// ParseBr 3073/// ::= 'br' TypeAndValue 3074/// ::= 'br' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3075bool LLParser::ParseBr(Instruction *&Inst, PerFunctionState &PFS) { 3076 LocTy Loc, Loc2; 3077 Value *Op0; 3078 BasicBlock *Op1, *Op2; 3079 if (ParseTypeAndValue(Op0, Loc, PFS)) return true; 3080 3081 if (BasicBlock *BB = dyn_cast<BasicBlock>(Op0)) { 3082 Inst = BranchInst::Create(BB); 3083 return false; 3084 } 3085 3086 if (Op0->getType() != Type::getInt1Ty(Context)) 3087 return Error(Loc, "branch condition must have 'i1' type"); 3088 3089 if (ParseToken(lltok::comma, "expected ',' after branch condition") || 3090 ParseTypeAndBasicBlock(Op1, Loc, PFS) || 3091 ParseToken(lltok::comma, "expected ',' after true destination") || 3092 ParseTypeAndBasicBlock(Op2, Loc2, PFS)) 3093 return true; 3094 3095 Inst = BranchInst::Create(Op1, Op2, Op0); 3096 return false; 3097} 3098 3099/// ParseSwitch 3100/// Instruction 3101/// ::= 'switch' TypeAndValue ',' TypeAndValue '[' JumpTable ']' 3102/// JumpTable 3103/// ::= (TypeAndValue ',' TypeAndValue)* 3104bool LLParser::ParseSwitch(Instruction *&Inst, PerFunctionState &PFS) { 3105 LocTy CondLoc, BBLoc; 3106 Value *Cond; 3107 BasicBlock *DefaultBB; 3108 if (ParseTypeAndValue(Cond, CondLoc, PFS) || 3109 ParseToken(lltok::comma, "expected ',' after switch condition") || 3110 ParseTypeAndBasicBlock(DefaultBB, BBLoc, PFS) || 3111 ParseToken(lltok::lsquare, "expected '[' with switch table")) 3112 return true; 3113 3114 if (!Cond->getType()->isIntegerTy()) 3115 return Error(CondLoc, "switch condition must have integer type"); 3116 3117 // Parse the jump table pairs. 3118 SmallPtrSet<Value*, 32> SeenCases; 3119 SmallVector<std::pair<ConstantInt*, BasicBlock*>, 32> Table; 3120 while (Lex.getKind() != lltok::rsquare) { 3121 Value *Constant; 3122 BasicBlock *DestBB; 3123 3124 if (ParseTypeAndValue(Constant, CondLoc, PFS) || 3125 ParseToken(lltok::comma, "expected ',' after case value") || 3126 ParseTypeAndBasicBlock(DestBB, PFS)) 3127 return true; 3128 3129 if (!SeenCases.insert(Constant)) 3130 return Error(CondLoc, "duplicate case value in switch"); 3131 if (!isa<ConstantInt>(Constant)) 3132 return Error(CondLoc, "case value is not a constant integer"); 3133 3134 Table.push_back(std::make_pair(cast<ConstantInt>(Constant), DestBB)); 3135 } 3136 3137 Lex.Lex(); // Eat the ']'. 3138 3139 SwitchInst *SI = SwitchInst::Create(Cond, DefaultBB, Table.size()); 3140 for (unsigned i = 0, e = Table.size(); i != e; ++i) 3141 SI->addCase(Table[i].first, Table[i].second); 3142 Inst = SI; 3143 return false; 3144} 3145 3146/// ParseIndirectBr 3147/// Instruction 3148/// ::= 'indirectbr' TypeAndValue ',' '[' LabelList ']' 3149bool LLParser::ParseIndirectBr(Instruction *&Inst, PerFunctionState &PFS) { 3150 LocTy AddrLoc; 3151 Value *Address; 3152 if (ParseTypeAndValue(Address, AddrLoc, PFS) || 3153 ParseToken(lltok::comma, "expected ',' after indirectbr address") || 3154 ParseToken(lltok::lsquare, "expected '[' with indirectbr")) 3155 return true; 3156 3157 if (!Address->getType()->isPointerTy()) 3158 return Error(AddrLoc, "indirectbr address must have pointer type"); 3159 3160 // Parse the destination list. 3161 SmallVector<BasicBlock*, 16> DestList; 3162 3163 if (Lex.getKind() != lltok::rsquare) { 3164 BasicBlock *DestBB; 3165 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3166 return true; 3167 DestList.push_back(DestBB); 3168 3169 while (EatIfPresent(lltok::comma)) { 3170 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3171 return true; 3172 DestList.push_back(DestBB); 3173 } 3174 } 3175 3176 if (ParseToken(lltok::rsquare, "expected ']' at end of block list")) 3177 return true; 3178 3179 IndirectBrInst *IBI = IndirectBrInst::Create(Address, DestList.size()); 3180 for (unsigned i = 0, e = DestList.size(); i != e; ++i) 3181 IBI->addDestination(DestList[i]); 3182 Inst = IBI; 3183 return false; 3184} 3185 3186 3187/// ParseInvoke 3188/// ::= 'invoke' OptionalCallingConv OptionalAttrs Type Value ParamList 3189/// OptionalAttrs 'to' TypeAndValue 'unwind' TypeAndValue 3190bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) { 3191 LocTy CallLoc = Lex.getLoc(); 3192 unsigned RetAttrs, FnAttrs; 3193 CallingConv::ID CC; 3194 PATypeHolder RetType(Type::getVoidTy(Context)); 3195 LocTy RetTypeLoc; 3196 ValID CalleeID; 3197 SmallVector<ParamInfo, 16> ArgList; 3198 3199 BasicBlock *NormalBB, *UnwindBB; 3200 if (ParseOptionalCallingConv(CC) || 3201 ParseOptionalAttrs(RetAttrs, 1) || 3202 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3203 ParseValID(CalleeID) || 3204 ParseParameterList(ArgList, PFS) || 3205 ParseOptionalAttrs(FnAttrs, 2) || 3206 ParseToken(lltok::kw_to, "expected 'to' in invoke") || 3207 ParseTypeAndBasicBlock(NormalBB, PFS) || 3208 ParseToken(lltok::kw_unwind, "expected 'unwind' in invoke") || 3209 ParseTypeAndBasicBlock(UnwindBB, PFS)) 3210 return true; 3211 3212 // If RetType is a non-function pointer type, then this is the short syntax 3213 // for the call, which means that RetType is just the return type. Infer the 3214 // rest of the function argument types from the arguments that are present. 3215 const PointerType *PFTy = 0; 3216 const FunctionType *Ty = 0; 3217 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3218 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3219 // Pull out the types of all of the arguments... 3220 std::vector<const Type*> ParamTypes; 3221 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3222 ParamTypes.push_back(ArgList[i].V->getType()); 3223 3224 if (!FunctionType::isValidReturnType(RetType)) 3225 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3226 3227 Ty = FunctionType::get(RetType, ParamTypes, false); 3228 PFTy = PointerType::getUnqual(Ty); 3229 } 3230 3231 // Look up the callee. 3232 Value *Callee; 3233 if (ConvertValIDToValue(PFTy, CalleeID, Callee, &PFS)) return true; 3234 3235 // Set up the Attributes for the function. 3236 SmallVector<AttributeWithIndex, 8> Attrs; 3237 if (RetAttrs != Attribute::None) 3238 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3239 3240 SmallVector<Value*, 8> Args; 3241 3242 // Loop through FunctionType's arguments and ensure they are specified 3243 // correctly. Also, gather any parameter attributes. 3244 FunctionType::param_iterator I = Ty->param_begin(); 3245 FunctionType::param_iterator E = Ty->param_end(); 3246 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3247 const Type *ExpectedTy = 0; 3248 if (I != E) { 3249 ExpectedTy = *I++; 3250 } else if (!Ty->isVarArg()) { 3251 return Error(ArgList[i].Loc, "too many arguments specified"); 3252 } 3253 3254 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3255 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3256 getTypeString(ExpectedTy) + "'"); 3257 Args.push_back(ArgList[i].V); 3258 if (ArgList[i].Attrs != Attribute::None) 3259 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3260 } 3261 3262 if (I != E) 3263 return Error(CallLoc, "not enough parameters specified for call"); 3264 3265 if (FnAttrs != Attribute::None) 3266 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3267 3268 // Finish off the Attributes and check them 3269 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3270 3271 InvokeInst *II = InvokeInst::Create(Callee, NormalBB, UnwindBB, 3272 Args.begin(), Args.end()); 3273 II->setCallingConv(CC); 3274 II->setAttributes(PAL); 3275 Inst = II; 3276 return false; 3277} 3278 3279 3280 3281//===----------------------------------------------------------------------===// 3282// Binary Operators. 3283//===----------------------------------------------------------------------===// 3284 3285/// ParseArithmetic 3286/// ::= ArithmeticOps TypeAndValue ',' Value 3287/// 3288/// If OperandType is 0, then any FP or integer operand is allowed. If it is 1, 3289/// then any integer operand is allowed, if it is 2, any fp operand is allowed. 3290bool LLParser::ParseArithmetic(Instruction *&Inst, PerFunctionState &PFS, 3291 unsigned Opc, unsigned OperandType) { 3292 LocTy Loc; Value *LHS, *RHS; 3293 if (ParseTypeAndValue(LHS, Loc, PFS) || 3294 ParseToken(lltok::comma, "expected ',' in arithmetic operation") || 3295 ParseValue(LHS->getType(), RHS, PFS)) 3296 return true; 3297 3298 bool Valid; 3299 switch (OperandType) { 3300 default: llvm_unreachable("Unknown operand type!"); 3301 case 0: // int or FP. 3302 Valid = LHS->getType()->isIntOrIntVectorTy() || 3303 LHS->getType()->isFPOrFPVectorTy(); 3304 break; 3305 case 1: Valid = LHS->getType()->isIntOrIntVectorTy(); break; 3306 case 2: Valid = LHS->getType()->isFPOrFPVectorTy(); break; 3307 } 3308 3309 if (!Valid) 3310 return Error(Loc, "invalid operand type for instruction"); 3311 3312 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3313 return false; 3314} 3315 3316/// ParseLogical 3317/// ::= ArithmeticOps TypeAndValue ',' Value { 3318bool LLParser::ParseLogical(Instruction *&Inst, PerFunctionState &PFS, 3319 unsigned Opc) { 3320 LocTy Loc; Value *LHS, *RHS; 3321 if (ParseTypeAndValue(LHS, Loc, PFS) || 3322 ParseToken(lltok::comma, "expected ',' in logical operation") || 3323 ParseValue(LHS->getType(), RHS, PFS)) 3324 return true; 3325 3326 if (!LHS->getType()->isIntOrIntVectorTy()) 3327 return Error(Loc,"instruction requires integer or integer vector operands"); 3328 3329 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3330 return false; 3331} 3332 3333 3334/// ParseCompare 3335/// ::= 'icmp' IPredicates TypeAndValue ',' Value 3336/// ::= 'fcmp' FPredicates TypeAndValue ',' Value 3337bool LLParser::ParseCompare(Instruction *&Inst, PerFunctionState &PFS, 3338 unsigned Opc) { 3339 // Parse the integer/fp comparison predicate. 3340 LocTy Loc; 3341 unsigned Pred; 3342 Value *LHS, *RHS; 3343 if (ParseCmpPredicate(Pred, Opc) || 3344 ParseTypeAndValue(LHS, Loc, PFS) || 3345 ParseToken(lltok::comma, "expected ',' after compare value") || 3346 ParseValue(LHS->getType(), RHS, PFS)) 3347 return true; 3348 3349 if (Opc == Instruction::FCmp) { 3350 if (!LHS->getType()->isFPOrFPVectorTy()) 3351 return Error(Loc, "fcmp requires floating point operands"); 3352 Inst = new FCmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3353 } else { 3354 assert(Opc == Instruction::ICmp && "Unknown opcode for CmpInst!"); 3355 if (!LHS->getType()->isIntOrIntVectorTy() && 3356 !LHS->getType()->isPointerTy()) 3357 return Error(Loc, "icmp requires integer operands"); 3358 Inst = new ICmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3359 } 3360 return false; 3361} 3362 3363//===----------------------------------------------------------------------===// 3364// Other Instructions. 3365//===----------------------------------------------------------------------===// 3366 3367 3368/// ParseCast 3369/// ::= CastOpc TypeAndValue 'to' Type 3370bool LLParser::ParseCast(Instruction *&Inst, PerFunctionState &PFS, 3371 unsigned Opc) { 3372 LocTy Loc; Value *Op; 3373 PATypeHolder DestTy(Type::getVoidTy(Context)); 3374 if (ParseTypeAndValue(Op, Loc, PFS) || 3375 ParseToken(lltok::kw_to, "expected 'to' after cast value") || 3376 ParseType(DestTy)) 3377 return true; 3378 3379 if (!CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy)) { 3380 CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy); 3381 return Error(Loc, "invalid cast opcode for cast from '" + 3382 getTypeString(Op->getType()) + "' to '" + 3383 getTypeString(DestTy) + "'"); 3384 } 3385 Inst = CastInst::Create((Instruction::CastOps)Opc, Op, DestTy); 3386 return false; 3387} 3388 3389/// ParseSelect 3390/// ::= 'select' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3391bool LLParser::ParseSelect(Instruction *&Inst, PerFunctionState &PFS) { 3392 LocTy Loc; 3393 Value *Op0, *Op1, *Op2; 3394 if (ParseTypeAndValue(Op0, Loc, PFS) || 3395 ParseToken(lltok::comma, "expected ',' after select condition") || 3396 ParseTypeAndValue(Op1, PFS) || 3397 ParseToken(lltok::comma, "expected ',' after select value") || 3398 ParseTypeAndValue(Op2, PFS)) 3399 return true; 3400 3401 if (const char *Reason = SelectInst::areInvalidOperands(Op0, Op1, Op2)) 3402 return Error(Loc, Reason); 3403 3404 Inst = SelectInst::Create(Op0, Op1, Op2); 3405 return false; 3406} 3407 3408/// ParseVA_Arg 3409/// ::= 'va_arg' TypeAndValue ',' Type 3410bool LLParser::ParseVA_Arg(Instruction *&Inst, PerFunctionState &PFS) { 3411 Value *Op; 3412 PATypeHolder EltTy(Type::getVoidTy(Context)); 3413 LocTy TypeLoc; 3414 if (ParseTypeAndValue(Op, PFS) || 3415 ParseToken(lltok::comma, "expected ',' after vaarg operand") || 3416 ParseType(EltTy, TypeLoc)) 3417 return true; 3418 3419 if (!EltTy->isFirstClassType()) 3420 return Error(TypeLoc, "va_arg requires operand with first class type"); 3421 3422 Inst = new VAArgInst(Op, EltTy); 3423 return false; 3424} 3425 3426/// ParseExtractElement 3427/// ::= 'extractelement' TypeAndValue ',' TypeAndValue 3428bool LLParser::ParseExtractElement(Instruction *&Inst, PerFunctionState &PFS) { 3429 LocTy Loc; 3430 Value *Op0, *Op1; 3431 if (ParseTypeAndValue(Op0, Loc, PFS) || 3432 ParseToken(lltok::comma, "expected ',' after extract value") || 3433 ParseTypeAndValue(Op1, PFS)) 3434 return true; 3435 3436 if (!ExtractElementInst::isValidOperands(Op0, Op1)) 3437 return Error(Loc, "invalid extractelement operands"); 3438 3439 Inst = ExtractElementInst::Create(Op0, Op1); 3440 return false; 3441} 3442 3443/// ParseInsertElement 3444/// ::= 'insertelement' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3445bool LLParser::ParseInsertElement(Instruction *&Inst, PerFunctionState &PFS) { 3446 LocTy Loc; 3447 Value *Op0, *Op1, *Op2; 3448 if (ParseTypeAndValue(Op0, Loc, PFS) || 3449 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3450 ParseTypeAndValue(Op1, PFS) || 3451 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3452 ParseTypeAndValue(Op2, PFS)) 3453 return true; 3454 3455 if (!InsertElementInst::isValidOperands(Op0, Op1, Op2)) 3456 return Error(Loc, "invalid insertelement operands"); 3457 3458 Inst = InsertElementInst::Create(Op0, Op1, Op2); 3459 return false; 3460} 3461 3462/// ParseShuffleVector 3463/// ::= 'shufflevector' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3464bool LLParser::ParseShuffleVector(Instruction *&Inst, PerFunctionState &PFS) { 3465 LocTy Loc; 3466 Value *Op0, *Op1, *Op2; 3467 if (ParseTypeAndValue(Op0, Loc, PFS) || 3468 ParseToken(lltok::comma, "expected ',' after shuffle mask") || 3469 ParseTypeAndValue(Op1, PFS) || 3470 ParseToken(lltok::comma, "expected ',' after shuffle value") || 3471 ParseTypeAndValue(Op2, PFS)) 3472 return true; 3473 3474 if (!ShuffleVectorInst::isValidOperands(Op0, Op1, Op2)) 3475 return Error(Loc, "invalid extractelement operands"); 3476 3477 Inst = new ShuffleVectorInst(Op0, Op1, Op2); 3478 return false; 3479} 3480 3481/// ParsePHI 3482/// ::= 'phi' Type '[' Value ',' Value ']' (',' '[' Value ',' Value ']')* 3483int LLParser::ParsePHI(Instruction *&Inst, PerFunctionState &PFS) { 3484 PATypeHolder Ty(Type::getVoidTy(Context)); 3485 Value *Op0, *Op1; 3486 LocTy TypeLoc = Lex.getLoc(); 3487 3488 if (ParseType(Ty) || 3489 ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3490 ParseValue(Ty, Op0, PFS) || 3491 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3492 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3493 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3494 return true; 3495 3496 bool AteExtraComma = false; 3497 SmallVector<std::pair<Value*, BasicBlock*>, 16> PHIVals; 3498 while (1) { 3499 PHIVals.push_back(std::make_pair(Op0, cast<BasicBlock>(Op1))); 3500 3501 if (!EatIfPresent(lltok::comma)) 3502 break; 3503 3504 if (Lex.getKind() == lltok::MetadataVar) { 3505 AteExtraComma = true; 3506 break; 3507 } 3508 3509 if (ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3510 ParseValue(Ty, Op0, PFS) || 3511 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3512 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3513 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3514 return true; 3515 } 3516 3517 if (!Ty->isFirstClassType()) 3518 return Error(TypeLoc, "phi node must have first class type"); 3519 3520 PHINode *PN = PHINode::Create(Ty, PHIVals.size()); 3521 for (unsigned i = 0, e = PHIVals.size(); i != e; ++i) 3522 PN->addIncoming(PHIVals[i].first, PHIVals[i].second); 3523 Inst = PN; 3524 return AteExtraComma ? InstExtraComma : InstNormal; 3525} 3526 3527/// ParseCall 3528/// ::= 'tail'? 'call' OptionalCallingConv OptionalAttrs Type Value 3529/// ParameterList OptionalAttrs 3530bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS, 3531 bool isTail) { 3532 unsigned RetAttrs, FnAttrs; 3533 CallingConv::ID CC; 3534 PATypeHolder RetType(Type::getVoidTy(Context)); 3535 LocTy RetTypeLoc; 3536 ValID CalleeID; 3537 SmallVector<ParamInfo, 16> ArgList; 3538 LocTy CallLoc = Lex.getLoc(); 3539 3540 if ((isTail && ParseToken(lltok::kw_call, "expected 'tail call'")) || 3541 ParseOptionalCallingConv(CC) || 3542 ParseOptionalAttrs(RetAttrs, 1) || 3543 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3544 ParseValID(CalleeID) || 3545 ParseParameterList(ArgList, PFS) || 3546 ParseOptionalAttrs(FnAttrs, 2)) 3547 return true; 3548 3549 // If RetType is a non-function pointer type, then this is the short syntax 3550 // for the call, which means that RetType is just the return type. Infer the 3551 // rest of the function argument types from the arguments that are present. 3552 const PointerType *PFTy = 0; 3553 const FunctionType *Ty = 0; 3554 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3555 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3556 // Pull out the types of all of the arguments... 3557 std::vector<const Type*> ParamTypes; 3558 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3559 ParamTypes.push_back(ArgList[i].V->getType()); 3560 3561 if (!FunctionType::isValidReturnType(RetType)) 3562 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3563 3564 Ty = FunctionType::get(RetType, ParamTypes, false); 3565 PFTy = PointerType::getUnqual(Ty); 3566 } 3567 3568 // Look up the callee. 3569 Value *Callee; 3570 if (ConvertValIDToValue(PFTy, CalleeID, Callee, &PFS)) return true; 3571 3572 // Set up the Attributes for the function. 3573 SmallVector<AttributeWithIndex, 8> Attrs; 3574 if (RetAttrs != Attribute::None) 3575 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3576 3577 SmallVector<Value*, 8> Args; 3578 3579 // Loop through FunctionType's arguments and ensure they are specified 3580 // correctly. Also, gather any parameter attributes. 3581 FunctionType::param_iterator I = Ty->param_begin(); 3582 FunctionType::param_iterator E = Ty->param_end(); 3583 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3584 const Type *ExpectedTy = 0; 3585 if (I != E) { 3586 ExpectedTy = *I++; 3587 } else if (!Ty->isVarArg()) { 3588 return Error(ArgList[i].Loc, "too many arguments specified"); 3589 } 3590 3591 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3592 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3593 getTypeString(ExpectedTy) + "'"); 3594 Args.push_back(ArgList[i].V); 3595 if (ArgList[i].Attrs != Attribute::None) 3596 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3597 } 3598 3599 if (I != E) 3600 return Error(CallLoc, "not enough parameters specified for call"); 3601 3602 if (FnAttrs != Attribute::None) 3603 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3604 3605 // Finish off the Attributes and check them 3606 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3607 3608 CallInst *CI = CallInst::Create(Callee, Args.begin(), Args.end()); 3609 CI->setTailCall(isTail); 3610 CI->setCallingConv(CC); 3611 CI->setAttributes(PAL); 3612 Inst = CI; 3613 return false; 3614} 3615 3616//===----------------------------------------------------------------------===// 3617// Memory Instructions. 3618//===----------------------------------------------------------------------===// 3619 3620/// ParseAlloc 3621/// ::= 'alloca' Type (',' TypeAndValue)? (',' OptionalInfo)? 3622int LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS) { 3623 PATypeHolder Ty(Type::getVoidTy(Context)); 3624 Value *Size = 0; 3625 LocTy SizeLoc; 3626 unsigned Alignment = 0; 3627 if (ParseType(Ty)) return true; 3628 3629 bool AteExtraComma = false; 3630 if (EatIfPresent(lltok::comma)) { 3631 if (Lex.getKind() == lltok::kw_align) { 3632 if (ParseOptionalAlignment(Alignment)) return true; 3633 } else if (Lex.getKind() == lltok::MetadataVar) { 3634 AteExtraComma = true; 3635 } else { 3636 if (ParseTypeAndValue(Size, SizeLoc, PFS) || 3637 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3638 return true; 3639 } 3640 } 3641 3642 if (Size && !Size->getType()->isIntegerTy()) 3643 return Error(SizeLoc, "element count must have integer type"); 3644 3645 Inst = new AllocaInst(Ty, Size, Alignment); 3646 return AteExtraComma ? InstExtraComma : InstNormal; 3647} 3648 3649/// ParseLoad 3650/// ::= 'volatile'? 'load' TypeAndValue (',' OptionalInfo)? 3651int LLParser::ParseLoad(Instruction *&Inst, PerFunctionState &PFS, 3652 bool isVolatile) { 3653 Value *Val; LocTy Loc; 3654 unsigned Alignment = 0; 3655 bool AteExtraComma = false; 3656 if (ParseTypeAndValue(Val, Loc, PFS) || 3657 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3658 return true; 3659 3660 if (!Val->getType()->isPointerTy() || 3661 !cast<PointerType>(Val->getType())->getElementType()->isFirstClassType()) 3662 return Error(Loc, "load operand must be a pointer to a first class type"); 3663 3664 Inst = new LoadInst(Val, "", isVolatile, Alignment); 3665 return AteExtraComma ? InstExtraComma : InstNormal; 3666} 3667 3668/// ParseStore 3669/// ::= 'volatile'? 'store' TypeAndValue ',' TypeAndValue (',' 'align' i32)? 3670int LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS, 3671 bool isVolatile) { 3672 Value *Val, *Ptr; LocTy Loc, PtrLoc; 3673 unsigned Alignment = 0; 3674 bool AteExtraComma = false; 3675 if (ParseTypeAndValue(Val, Loc, PFS) || 3676 ParseToken(lltok::comma, "expected ',' after store operand") || 3677 ParseTypeAndValue(Ptr, PtrLoc, PFS) || 3678 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3679 return true; 3680 3681 if (!Ptr->getType()->isPointerTy()) 3682 return Error(PtrLoc, "store operand must be a pointer"); 3683 if (!Val->getType()->isFirstClassType()) 3684 return Error(Loc, "store operand must be a first class value"); 3685 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType()) 3686 return Error(Loc, "stored value and pointer type do not match"); 3687 3688 Inst = new StoreInst(Val, Ptr, isVolatile, Alignment); 3689 return AteExtraComma ? InstExtraComma : InstNormal; 3690} 3691 3692/// ParseGetElementPtr 3693/// ::= 'getelementptr' 'inbounds'? TypeAndValue (',' TypeAndValue)* 3694int LLParser::ParseGetElementPtr(Instruction *&Inst, PerFunctionState &PFS) { 3695 Value *Ptr, *Val; LocTy Loc, EltLoc; 3696 3697 bool InBounds = EatIfPresent(lltok::kw_inbounds); 3698 3699 if (ParseTypeAndValue(Ptr, Loc, PFS)) return true; 3700 3701 if (!Ptr->getType()->isPointerTy()) 3702 return Error(Loc, "base of getelementptr must be a pointer"); 3703 3704 SmallVector<Value*, 16> Indices; 3705 bool AteExtraComma = false; 3706 while (EatIfPresent(lltok::comma)) { 3707 if (Lex.getKind() == lltok::MetadataVar) { 3708 AteExtraComma = true; 3709 break; 3710 } 3711 if (ParseTypeAndValue(Val, EltLoc, PFS)) return true; 3712 if (!Val->getType()->isIntegerTy()) 3713 return Error(EltLoc, "getelementptr index must be an integer"); 3714 Indices.push_back(Val); 3715 } 3716 3717 if (!GetElementPtrInst::getIndexedType(Ptr->getType(), 3718 Indices.begin(), Indices.end())) 3719 return Error(Loc, "invalid getelementptr indices"); 3720 Inst = GetElementPtrInst::Create(Ptr, Indices.begin(), Indices.end()); 3721 if (InBounds) 3722 cast<GetElementPtrInst>(Inst)->setIsInBounds(true); 3723 return AteExtraComma ? InstExtraComma : InstNormal; 3724} 3725 3726/// ParseExtractValue 3727/// ::= 'extractvalue' TypeAndValue (',' uint32)+ 3728int LLParser::ParseExtractValue(Instruction *&Inst, PerFunctionState &PFS) { 3729 Value *Val; LocTy Loc; 3730 SmallVector<unsigned, 4> Indices; 3731 bool AteExtraComma; 3732 if (ParseTypeAndValue(Val, Loc, PFS) || 3733 ParseIndexList(Indices, AteExtraComma)) 3734 return true; 3735 3736 if (!Val->getType()->isAggregateType()) 3737 return Error(Loc, "extractvalue operand must be aggregate type"); 3738 3739 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 3740 Indices.end())) 3741 return Error(Loc, "invalid indices for extractvalue"); 3742 Inst = ExtractValueInst::Create(Val, Indices.begin(), Indices.end()); 3743 return AteExtraComma ? InstExtraComma : InstNormal; 3744} 3745 3746/// ParseInsertValue 3747/// ::= 'insertvalue' TypeAndValue ',' TypeAndValue (',' uint32)+ 3748int LLParser::ParseInsertValue(Instruction *&Inst, PerFunctionState &PFS) { 3749 Value *Val0, *Val1; LocTy Loc0, Loc1; 3750 SmallVector<unsigned, 4> Indices; 3751 bool AteExtraComma; 3752 if (ParseTypeAndValue(Val0, Loc0, PFS) || 3753 ParseToken(lltok::comma, "expected comma after insertvalue operand") || 3754 ParseTypeAndValue(Val1, Loc1, PFS) || 3755 ParseIndexList(Indices, AteExtraComma)) 3756 return true; 3757 3758 if (!Val0->getType()->isAggregateType()) 3759 return Error(Loc0, "insertvalue operand must be aggregate type"); 3760 3761 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 3762 Indices.end())) 3763 return Error(Loc0, "invalid indices for insertvalue"); 3764 Inst = InsertValueInst::Create(Val0, Val1, Indices.begin(), Indices.end()); 3765 return AteExtraComma ? InstExtraComma : InstNormal; 3766} 3767 3768//===----------------------------------------------------------------------===// 3769// Embedded metadata. 3770//===----------------------------------------------------------------------===// 3771 3772/// ParseMDNodeVector 3773/// ::= Element (',' Element)* 3774/// Element 3775/// ::= 'null' | TypeAndValue 3776bool LLParser::ParseMDNodeVector(SmallVectorImpl<Value*> &Elts, 3777 PerFunctionState *PFS) { 3778 // Check for an empty list. 3779 if (Lex.getKind() == lltok::rbrace) 3780 return false; 3781 3782 do { 3783 // Null is a special case since it is typeless. 3784 if (EatIfPresent(lltok::kw_null)) { 3785 Elts.push_back(0); 3786 continue; 3787 } 3788 3789 Value *V = 0; 3790 PATypeHolder Ty(Type::getVoidTy(Context)); 3791 ValID ID; 3792 if (ParseType(Ty) || ParseValID(ID, PFS) || 3793 ConvertValIDToValue(Ty, ID, V, PFS)) 3794 return true; 3795 3796 Elts.push_back(V); 3797 } while (EatIfPresent(lltok::comma)); 3798 3799 return false; 3800} 3801