LLParser.cpp revision f1bc7ce7b362d2859349c7a1e2bc6df493d0f809
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/ADT/StringExtras.h" 26#include "llvm/Support/ErrorHandling.h" 27#include "llvm/Support/raw_ostream.h" 28using namespace llvm; 29 30/// Run: module ::= toplevelentity* 31bool LLParser::Run() { 32 // Prime the lexer. 33 Lex.Lex(); 34 35 return ParseTopLevelEntities() || 36 ValidateEndOfModule(); 37} 38 39/// ValidateEndOfModule - Do final validity and sanity checks at the end of the 40/// module. 41bool LLParser::ValidateEndOfModule() { 42 // Update auto-upgraded malloc calls to "malloc". 43 // FIXME: Remove in LLVM 3.0. 44 if (MallocF) { 45 MallocF->setName("malloc"); 46 // If setName() does not set the name to "malloc", then there is already a 47 // declaration of "malloc". In that case, iterate over all calls to MallocF 48 // and get them to call the declared "malloc" instead. 49 if (MallocF->getName() != "malloc") { 50 Constant *RealMallocF = M->getFunction("malloc"); 51 if (RealMallocF->getType() != MallocF->getType()) 52 RealMallocF = ConstantExpr::getBitCast(RealMallocF, MallocF->getType()); 53 MallocF->replaceAllUsesWith(RealMallocF); 54 MallocF->eraseFromParent(); 55 MallocF = NULL; 56 } 57 } 58 59 60 // If there are entries in ForwardRefBlockAddresses at this point, they are 61 // references after the function was defined. Resolve those now. 62 while (!ForwardRefBlockAddresses.empty()) { 63 // Okay, we are referencing an already-parsed function, resolve them now. 64 Function *TheFn = 0; 65 const ValID &Fn = ForwardRefBlockAddresses.begin()->first; 66 if (Fn.Kind == ValID::t_GlobalName) 67 TheFn = M->getFunction(Fn.StrVal); 68 else if (Fn.UIntVal < NumberedVals.size()) 69 TheFn = dyn_cast<Function>(NumberedVals[Fn.UIntVal]); 70 71 if (TheFn == 0) 72 return Error(Fn.Loc, "unknown function referenced by blockaddress"); 73 74 // Resolve all these references. 75 if (ResolveForwardRefBlockAddresses(TheFn, 76 ForwardRefBlockAddresses.begin()->second, 77 0)) 78 return true; 79 80 ForwardRefBlockAddresses.erase(ForwardRefBlockAddresses.begin()); 81 } 82 83 84 if (!ForwardRefTypes.empty()) 85 return Error(ForwardRefTypes.begin()->second.second, 86 "use of undefined type named '" + 87 ForwardRefTypes.begin()->first + "'"); 88 if (!ForwardRefTypeIDs.empty()) 89 return Error(ForwardRefTypeIDs.begin()->second.second, 90 "use of undefined type '%" + 91 utostr(ForwardRefTypeIDs.begin()->first) + "'"); 92 93 if (!ForwardRefVals.empty()) 94 return Error(ForwardRefVals.begin()->second.second, 95 "use of undefined value '@" + ForwardRefVals.begin()->first + 96 "'"); 97 98 if (!ForwardRefValIDs.empty()) 99 return Error(ForwardRefValIDs.begin()->second.second, 100 "use of undefined value '@" + 101 utostr(ForwardRefValIDs.begin()->first) + "'"); 102 103 if (!ForwardRefMDNodes.empty()) 104 return Error(ForwardRefMDNodes.begin()->second.second, 105 "use of undefined metadata '!" + 106 utostr(ForwardRefMDNodes.begin()->first) + "'"); 107 108 109 // Look for intrinsic functions and CallInst that need to be upgraded 110 for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ) 111 UpgradeCallsToIntrinsic(FI++); // must be post-increment, as we remove 112 113 // Check debug info intrinsics. 114 CheckDebugInfoIntrinsics(M); 115 return false; 116} 117 118bool LLParser::ResolveForwardRefBlockAddresses(Function *TheFn, 119 std::vector<std::pair<ValID, GlobalValue*> > &Refs, 120 PerFunctionState *PFS) { 121 // Loop over all the references, resolving them. 122 for (unsigned i = 0, e = Refs.size(); i != e; ++i) { 123 BasicBlock *Res; 124 if (PFS) { 125 if (Refs[i].first.Kind == ValID::t_LocalName) 126 Res = PFS->GetBB(Refs[i].first.StrVal, Refs[i].first.Loc); 127 else 128 Res = PFS->GetBB(Refs[i].first.UIntVal, Refs[i].first.Loc); 129 } else if (Refs[i].first.Kind == ValID::t_LocalID) { 130 return Error(Refs[i].first.Loc, 131 "cannot take address of numeric label after the function is defined"); 132 } else { 133 Res = dyn_cast_or_null<BasicBlock>( 134 TheFn->getValueSymbolTable().lookup(Refs[i].first.StrVal)); 135 } 136 137 if (Res == 0) 138 return Error(Refs[i].first.Loc, 139 "referenced value is not a basic block"); 140 141 // Get the BlockAddress for this and update references to use it. 142 BlockAddress *BA = BlockAddress::get(TheFn, Res); 143 Refs[i].second->replaceAllUsesWith(BA); 144 Refs[i].second->eraseFromParent(); 145 } 146 return false; 147} 148 149 150//===----------------------------------------------------------------------===// 151// Top-Level Entities 152//===----------------------------------------------------------------------===// 153 154bool LLParser::ParseTopLevelEntities() { 155 while (1) { 156 switch (Lex.getKind()) { 157 default: return TokError("expected top-level entity"); 158 case lltok::Eof: return false; 159 //case lltok::kw_define: 160 case lltok::kw_declare: if (ParseDeclare()) return true; break; 161 case lltok::kw_define: if (ParseDefine()) return true; break; 162 case lltok::kw_module: if (ParseModuleAsm()) return true; break; 163 case lltok::kw_target: if (ParseTargetDefinition()) return true; break; 164 case lltok::kw_deplibs: if (ParseDepLibs()) return true; break; 165 case lltok::kw_type: if (ParseUnnamedType()) return true; break; 166 case lltok::LocalVarID: if (ParseUnnamedType()) return true; break; 167 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0 168 case lltok::LocalVar: if (ParseNamedType()) return true; break; 169 case lltok::GlobalID: if (ParseUnnamedGlobal()) return true; break; 170 case lltok::GlobalVar: if (ParseNamedGlobal()) return true; break; 171 case lltok::exclaim: if (ParseStandaloneMetadata()) return true; break; 172 case lltok::MetadataVar: if (ParseNamedMetadata()) return true; break; 173 174 // The Global variable production with no name can have many different 175 // optional leading prefixes, the production is: 176 // GlobalVar ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 177 // OptionalAddrSpace ('constant'|'global') ... 178 case lltok::kw_private : // OptionalLinkage 179 case lltok::kw_linker_private: // OptionalLinkage 180 case lltok::kw_internal: // OptionalLinkage 181 case lltok::kw_weak: // OptionalLinkage 182 case lltok::kw_weak_odr: // OptionalLinkage 183 case lltok::kw_linkonce: // OptionalLinkage 184 case lltok::kw_linkonce_odr: // OptionalLinkage 185 case lltok::kw_appending: // OptionalLinkage 186 case lltok::kw_dllexport: // OptionalLinkage 187 case lltok::kw_common: // OptionalLinkage 188 case lltok::kw_dllimport: // OptionalLinkage 189 case lltok::kw_extern_weak: // OptionalLinkage 190 case lltok::kw_external: { // OptionalLinkage 191 unsigned Linkage, Visibility; 192 if (ParseOptionalLinkage(Linkage) || 193 ParseOptionalVisibility(Visibility) || 194 ParseGlobal("", SMLoc(), Linkage, true, Visibility)) 195 return true; 196 break; 197 } 198 case lltok::kw_default: // OptionalVisibility 199 case lltok::kw_hidden: // OptionalVisibility 200 case lltok::kw_protected: { // OptionalVisibility 201 unsigned Visibility; 202 if (ParseOptionalVisibility(Visibility) || 203 ParseGlobal("", SMLoc(), 0, false, Visibility)) 204 return true; 205 break; 206 } 207 208 case lltok::kw_thread_local: // OptionalThreadLocal 209 case lltok::kw_addrspace: // OptionalAddrSpace 210 case lltok::kw_constant: // GlobalType 211 case lltok::kw_global: // GlobalType 212 if (ParseGlobal("", SMLoc(), 0, false, 0)) return true; 213 break; 214 } 215 } 216} 217 218 219/// toplevelentity 220/// ::= 'module' 'asm' STRINGCONSTANT 221bool LLParser::ParseModuleAsm() { 222 assert(Lex.getKind() == lltok::kw_module); 223 Lex.Lex(); 224 225 std::string AsmStr; 226 if (ParseToken(lltok::kw_asm, "expected 'module asm'") || 227 ParseStringConstant(AsmStr)) return true; 228 229 const std::string &AsmSoFar = M->getModuleInlineAsm(); 230 if (AsmSoFar.empty()) 231 M->setModuleInlineAsm(AsmStr); 232 else 233 M->setModuleInlineAsm(AsmSoFar+"\n"+AsmStr); 234 return false; 235} 236 237/// toplevelentity 238/// ::= 'target' 'triple' '=' STRINGCONSTANT 239/// ::= 'target' 'datalayout' '=' STRINGCONSTANT 240bool LLParser::ParseTargetDefinition() { 241 assert(Lex.getKind() == lltok::kw_target); 242 std::string Str; 243 switch (Lex.Lex()) { 244 default: return TokError("unknown target property"); 245 case lltok::kw_triple: 246 Lex.Lex(); 247 if (ParseToken(lltok::equal, "expected '=' after target triple") || 248 ParseStringConstant(Str)) 249 return true; 250 M->setTargetTriple(Str); 251 return false; 252 case lltok::kw_datalayout: 253 Lex.Lex(); 254 if (ParseToken(lltok::equal, "expected '=' after target datalayout") || 255 ParseStringConstant(Str)) 256 return true; 257 M->setDataLayout(Str); 258 return false; 259 } 260} 261 262/// toplevelentity 263/// ::= 'deplibs' '=' '[' ']' 264/// ::= 'deplibs' '=' '[' STRINGCONSTANT (',' STRINGCONSTANT)* ']' 265bool LLParser::ParseDepLibs() { 266 assert(Lex.getKind() == lltok::kw_deplibs); 267 Lex.Lex(); 268 if (ParseToken(lltok::equal, "expected '=' after deplibs") || 269 ParseToken(lltok::lsquare, "expected '=' after deplibs")) 270 return true; 271 272 if (EatIfPresent(lltok::rsquare)) 273 return false; 274 275 std::string Str; 276 if (ParseStringConstant(Str)) return true; 277 M->addLibrary(Str); 278 279 while (EatIfPresent(lltok::comma)) { 280 if (ParseStringConstant(Str)) return true; 281 M->addLibrary(Str); 282 } 283 284 return ParseToken(lltok::rsquare, "expected ']' at end of list"); 285} 286 287/// ParseUnnamedType: 288/// ::= 'type' type 289/// ::= LocalVarID '=' 'type' type 290bool LLParser::ParseUnnamedType() { 291 unsigned TypeID = NumberedTypes.size(); 292 293 // Handle the LocalVarID form. 294 if (Lex.getKind() == lltok::LocalVarID) { 295 if (Lex.getUIntVal() != TypeID) 296 return Error(Lex.getLoc(), "type expected to be numbered '%" + 297 utostr(TypeID) + "'"); 298 Lex.Lex(); // eat LocalVarID; 299 300 if (ParseToken(lltok::equal, "expected '=' after name")) 301 return true; 302 } 303 304 assert(Lex.getKind() == lltok::kw_type); 305 LocTy TypeLoc = Lex.getLoc(); 306 Lex.Lex(); // eat kw_type 307 308 PATypeHolder Ty(Type::getVoidTy(Context)); 309 if (ParseType(Ty)) return true; 310 311 // See if this type was previously referenced. 312 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 313 FI = ForwardRefTypeIDs.find(TypeID); 314 if (FI != ForwardRefTypeIDs.end()) { 315 if (FI->second.first.get() == Ty) 316 return Error(TypeLoc, "self referential type is invalid"); 317 318 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 319 Ty = FI->second.first.get(); 320 ForwardRefTypeIDs.erase(FI); 321 } 322 323 NumberedTypes.push_back(Ty); 324 325 return false; 326} 327 328/// toplevelentity 329/// ::= LocalVar '=' 'type' type 330bool LLParser::ParseNamedType() { 331 std::string Name = Lex.getStrVal(); 332 LocTy NameLoc = Lex.getLoc(); 333 Lex.Lex(); // eat LocalVar. 334 335 PATypeHolder Ty(Type::getVoidTy(Context)); 336 337 if (ParseToken(lltok::equal, "expected '=' after name") || 338 ParseToken(lltok::kw_type, "expected 'type' after name") || 339 ParseType(Ty)) 340 return true; 341 342 // Set the type name, checking for conflicts as we do so. 343 bool AlreadyExists = M->addTypeName(Name, Ty); 344 if (!AlreadyExists) return false; 345 346 // See if this type is a forward reference. We need to eagerly resolve 347 // types to allow recursive type redefinitions below. 348 std::map<std::string, std::pair<PATypeHolder, LocTy> >::iterator 349 FI = ForwardRefTypes.find(Name); 350 if (FI != ForwardRefTypes.end()) { 351 if (FI->second.first.get() == Ty) 352 return Error(NameLoc, "self referential type is invalid"); 353 354 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 355 Ty = FI->second.first.get(); 356 ForwardRefTypes.erase(FI); 357 } 358 359 // Inserting a name that is already defined, get the existing name. 360 const Type *Existing = M->getTypeByName(Name); 361 assert(Existing && "Conflict but no matching type?!"); 362 363 // Otherwise, this is an attempt to redefine a type. That's okay if 364 // the redefinition is identical to the original. 365 // FIXME: REMOVE REDEFINITIONS IN LLVM 3.0 366 if (Existing == Ty) return false; 367 368 // Any other kind of (non-equivalent) redefinition is an error. 369 return Error(NameLoc, "redefinition of type named '" + Name + "' of type '" + 370 Ty->getDescription() + "'"); 371} 372 373 374/// toplevelentity 375/// ::= 'declare' FunctionHeader 376bool LLParser::ParseDeclare() { 377 assert(Lex.getKind() == lltok::kw_declare); 378 Lex.Lex(); 379 380 Function *F; 381 return ParseFunctionHeader(F, false); 382} 383 384/// toplevelentity 385/// ::= 'define' FunctionHeader '{' ... 386bool LLParser::ParseDefine() { 387 assert(Lex.getKind() == lltok::kw_define); 388 Lex.Lex(); 389 390 Function *F; 391 return ParseFunctionHeader(F, true) || 392 ParseFunctionBody(*F); 393} 394 395/// ParseGlobalType 396/// ::= 'constant' 397/// ::= 'global' 398bool LLParser::ParseGlobalType(bool &IsConstant) { 399 if (Lex.getKind() == lltok::kw_constant) 400 IsConstant = true; 401 else if (Lex.getKind() == lltok::kw_global) 402 IsConstant = false; 403 else { 404 IsConstant = false; 405 return TokError("expected 'global' or 'constant'"); 406 } 407 Lex.Lex(); 408 return false; 409} 410 411/// ParseUnnamedGlobal: 412/// OptionalVisibility ALIAS ... 413/// OptionalLinkage OptionalVisibility ... -> global variable 414/// GlobalID '=' OptionalVisibility ALIAS ... 415/// GlobalID '=' OptionalLinkage OptionalVisibility ... -> global variable 416bool LLParser::ParseUnnamedGlobal() { 417 unsigned VarID = NumberedVals.size(); 418 std::string Name; 419 LocTy NameLoc = Lex.getLoc(); 420 421 // Handle the GlobalID form. 422 if (Lex.getKind() == lltok::GlobalID) { 423 if (Lex.getUIntVal() != VarID) 424 return Error(Lex.getLoc(), "variable expected to be numbered '%" + 425 utostr(VarID) + "'"); 426 Lex.Lex(); // eat GlobalID; 427 428 if (ParseToken(lltok::equal, "expected '=' after name")) 429 return true; 430 } 431 432 bool HasLinkage; 433 unsigned Linkage, Visibility; 434 if (ParseOptionalLinkage(Linkage, HasLinkage) || 435 ParseOptionalVisibility(Visibility)) 436 return true; 437 438 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 439 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 440 return ParseAlias(Name, NameLoc, Visibility); 441} 442 443/// ParseNamedGlobal: 444/// GlobalVar '=' OptionalVisibility ALIAS ... 445/// GlobalVar '=' OptionalLinkage OptionalVisibility ... -> global variable 446bool LLParser::ParseNamedGlobal() { 447 assert(Lex.getKind() == lltok::GlobalVar); 448 LocTy NameLoc = Lex.getLoc(); 449 std::string Name = Lex.getStrVal(); 450 Lex.Lex(); 451 452 bool HasLinkage; 453 unsigned Linkage, Visibility; 454 if (ParseToken(lltok::equal, "expected '=' in global variable") || 455 ParseOptionalLinkage(Linkage, HasLinkage) || 456 ParseOptionalVisibility(Visibility)) 457 return true; 458 459 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 460 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 461 return ParseAlias(Name, NameLoc, Visibility); 462} 463 464// MDString: 465// ::= '!' STRINGCONSTANT 466bool LLParser::ParseMDString(MDString *&Result) { 467 std::string Str; 468 if (ParseStringConstant(Str)) return true; 469 Result = MDString::get(Context, Str); 470 return false; 471} 472 473// MDNode: 474// ::= '!' MDNodeNumber 475bool LLParser::ParseMDNodeID(MDNode *&Result) { 476 // !{ ..., !42, ... } 477 unsigned MID = 0; 478 if (ParseUInt32(MID)) return true; 479 480 // Check existing MDNode. 481 if (MID < NumberedMetadata.size() && NumberedMetadata[MID] != 0) { 482 Result = NumberedMetadata[MID]; 483 return false; 484 } 485 486 // Create MDNode forward reference. 487 488 // FIXME: This is not unique enough! 489 std::string FwdRefName = "llvm.mdnode.fwdref." + utostr(MID); 490 Value *V = MDString::get(Context, FwdRefName); 491 MDNode *FwdNode = MDNode::get(Context, &V, 1); 492 ForwardRefMDNodes[MID] = std::make_pair(FwdNode, Lex.getLoc()); 493 494 if (NumberedMetadata.size() <= MID) 495 NumberedMetadata.resize(MID+1); 496 NumberedMetadata[MID] = FwdNode; 497 Result = FwdNode; 498 return false; 499} 500 501/// ParseNamedMetadata: 502/// !foo = !{ !1, !2 } 503bool LLParser::ParseNamedMetadata() { 504 assert(Lex.getKind() == lltok::MetadataVar); 505 std::string Name = Lex.getStrVal(); 506 Lex.Lex(); 507 508 if (ParseToken(lltok::equal, "expected '=' here") || 509 ParseToken(lltok::exclaim, "Expected '!' here") || 510 ParseToken(lltok::lbrace, "Expected '{' here")) 511 return true; 512 513 SmallVector<MetadataBase *, 8> Elts; 514 do { 515 if (ParseToken(lltok::exclaim, "Expected '!' here")) 516 return true; 517 518 // FIXME: This rejects MDStrings. Are they legal in an named MDNode or not? 519 MDNode *N = 0; 520 if (ParseMDNodeID(N)) return true; 521 Elts.push_back(N); 522 } while (EatIfPresent(lltok::comma)); 523 524 if (ParseToken(lltok::rbrace, "expected end of metadata node")) 525 return true; 526 527 NamedMDNode::Create(Context, Name, Elts.data(), Elts.size(), M); 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 // FIXME: This doesn't make sense here. Pull braced MD stuff parsing out! 542 if (ParseUInt32(MetadataID) || 543 ParseToken(lltok::equal, "expected '=' here") || 544 ParseType(Ty, TyLoc) || 545 ParseToken(lltok::exclaim, "Expected '!' here") || 546 ParseToken(lltok::lbrace, "Expected '{' here") || 547 ParseMDNodeVector(Elts) || 548 ParseToken(lltok::rbrace, "expected end of metadata node")) 549 return true; 550 551 MDNode *Init = MDNode::get(Context, Elts.data(), Elts.size()); 552 553 // See if this was forward referenced, if so, handle it. 554 std::map<unsigned, std::pair<TrackingVH<MDNode>, LocTy> >::iterator 555 FI = ForwardRefMDNodes.find(MetadataID); 556 if (FI != ForwardRefMDNodes.end()) { 557 FI->second.first->replaceAllUsesWith(Init); 558 ForwardRefMDNodes.erase(FI); 559 560 assert(NumberedMetadata[MetadataID] == Init && "Tracking VH didn't work"); 561 } else { 562 if (MetadataID >= NumberedMetadata.size()) 563 NumberedMetadata.resize(MetadataID+1); 564 565 if (NumberedMetadata[MetadataID] != 0) 566 return TokError("Metadata id is already used"); 567 NumberedMetadata[MetadataID] = Init; 568 } 569 570 return false; 571} 572 573/// ParseAlias: 574/// ::= GlobalVar '=' OptionalVisibility 'alias' OptionalLinkage Aliasee 575/// Aliasee 576/// ::= TypeAndValue 577/// ::= 'bitcast' '(' TypeAndValue 'to' Type ')' 578/// ::= 'getelementptr' 'inbounds'? '(' ... ')' 579/// 580/// Everything through visibility has already been parsed. 581/// 582bool LLParser::ParseAlias(const std::string &Name, LocTy NameLoc, 583 unsigned Visibility) { 584 assert(Lex.getKind() == lltok::kw_alias); 585 Lex.Lex(); 586 unsigned Linkage; 587 LocTy LinkageLoc = Lex.getLoc(); 588 if (ParseOptionalLinkage(Linkage)) 589 return true; 590 591 if (Linkage != GlobalValue::ExternalLinkage && 592 Linkage != GlobalValue::WeakAnyLinkage && 593 Linkage != GlobalValue::WeakODRLinkage && 594 Linkage != GlobalValue::InternalLinkage && 595 Linkage != GlobalValue::PrivateLinkage && 596 Linkage != GlobalValue::LinkerPrivateLinkage) 597 return Error(LinkageLoc, "invalid linkage type for alias"); 598 599 Constant *Aliasee; 600 LocTy AliaseeLoc = Lex.getLoc(); 601 if (Lex.getKind() != lltok::kw_bitcast && 602 Lex.getKind() != lltok::kw_getelementptr) { 603 if (ParseGlobalTypeAndValue(Aliasee)) return true; 604 } else { 605 // The bitcast dest type is not present, it is implied by the dest type. 606 ValID ID; 607 if (ParseValID(ID)) return true; 608 if (ID.Kind != ValID::t_Constant) 609 return Error(AliaseeLoc, "invalid aliasee"); 610 Aliasee = ID.ConstantVal; 611 } 612 613 if (!isa<PointerType>(Aliasee->getType())) 614 return Error(AliaseeLoc, "alias must have pointer type"); 615 616 // Okay, create the alias but do not insert it into the module yet. 617 GlobalAlias* GA = new GlobalAlias(Aliasee->getType(), 618 (GlobalValue::LinkageTypes)Linkage, Name, 619 Aliasee); 620 GA->setVisibility((GlobalValue::VisibilityTypes)Visibility); 621 622 // See if this value already exists in the symbol table. If so, it is either 623 // a redefinition or a definition of a forward reference. 624 if (GlobalValue *Val = M->getNamedValue(Name)) { 625 // See if this was a redefinition. If so, there is no entry in 626 // ForwardRefVals. 627 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 628 I = ForwardRefVals.find(Name); 629 if (I == ForwardRefVals.end()) 630 return Error(NameLoc, "redefinition of global named '@" + Name + "'"); 631 632 // Otherwise, this was a definition of forward ref. Verify that types 633 // agree. 634 if (Val->getType() != GA->getType()) 635 return Error(NameLoc, 636 "forward reference and definition of alias have different types"); 637 638 // If they agree, just RAUW the old value with the alias and remove the 639 // forward ref info. 640 Val->replaceAllUsesWith(GA); 641 Val->eraseFromParent(); 642 ForwardRefVals.erase(I); 643 } 644 645 // Insert into the module, we know its name won't collide now. 646 M->getAliasList().push_back(GA); 647 assert(GA->getNameStr() == Name && "Should not be a name conflict!"); 648 649 return false; 650} 651 652/// ParseGlobal 653/// ::= GlobalVar '=' OptionalLinkage OptionalVisibility OptionalThreadLocal 654/// OptionalAddrSpace GlobalType Type Const 655/// ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 656/// OptionalAddrSpace GlobalType Type Const 657/// 658/// Everything through visibility has been parsed already. 659/// 660bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc, 661 unsigned Linkage, bool HasLinkage, 662 unsigned Visibility) { 663 unsigned AddrSpace; 664 bool ThreadLocal, IsConstant; 665 LocTy TyLoc; 666 667 PATypeHolder Ty(Type::getVoidTy(Context)); 668 if (ParseOptionalToken(lltok::kw_thread_local, ThreadLocal) || 669 ParseOptionalAddrSpace(AddrSpace) || 670 ParseGlobalType(IsConstant) || 671 ParseType(Ty, TyLoc)) 672 return true; 673 674 // If the linkage is specified and is external, then no initializer is 675 // present. 676 Constant *Init = 0; 677 if (!HasLinkage || (Linkage != GlobalValue::DLLImportLinkage && 678 Linkage != GlobalValue::ExternalWeakLinkage && 679 Linkage != GlobalValue::ExternalLinkage)) { 680 if (ParseGlobalValue(Ty, Init)) 681 return true; 682 } 683 684 if (isa<FunctionType>(Ty) || Ty->isLabelTy()) 685 return Error(TyLoc, "invalid type for global variable"); 686 687 GlobalVariable *GV = 0; 688 689 // See if the global was forward referenced, if so, use the global. 690 if (!Name.empty()) { 691 if (GlobalValue *GVal = M->getNamedValue(Name)) { 692 if (!ForwardRefVals.erase(Name) || !isa<GlobalValue>(GVal)) 693 return Error(NameLoc, "redefinition of global '@" + Name + "'"); 694 GV = cast<GlobalVariable>(GVal); 695 } 696 } else { 697 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 698 I = ForwardRefValIDs.find(NumberedVals.size()); 699 if (I != ForwardRefValIDs.end()) { 700 GV = cast<GlobalVariable>(I->second.first); 701 ForwardRefValIDs.erase(I); 702 } 703 } 704 705 if (GV == 0) { 706 GV = new GlobalVariable(*M, Ty, false, GlobalValue::ExternalLinkage, 0, 707 Name, 0, false, AddrSpace); 708 } else { 709 if (GV->getType()->getElementType() != Ty) 710 return Error(TyLoc, 711 "forward reference and definition of global have different types"); 712 713 // Move the forward-reference to the correct spot in the module. 714 M->getGlobalList().splice(M->global_end(), M->getGlobalList(), GV); 715 } 716 717 if (Name.empty()) 718 NumberedVals.push_back(GV); 719 720 // Set the parsed properties on the global. 721 if (Init) 722 GV->setInitializer(Init); 723 GV->setConstant(IsConstant); 724 GV->setLinkage((GlobalValue::LinkageTypes)Linkage); 725 GV->setVisibility((GlobalValue::VisibilityTypes)Visibility); 726 GV->setThreadLocal(ThreadLocal); 727 728 // Parse attributes on the global. 729 while (Lex.getKind() == lltok::comma) { 730 Lex.Lex(); 731 732 if (Lex.getKind() == lltok::kw_section) { 733 Lex.Lex(); 734 GV->setSection(Lex.getStrVal()); 735 if (ParseToken(lltok::StringConstant, "expected global section string")) 736 return true; 737 } else if (Lex.getKind() == lltok::kw_align) { 738 unsigned Alignment; 739 if (ParseOptionalAlignment(Alignment)) return true; 740 GV->setAlignment(Alignment); 741 } else { 742 TokError("unknown global variable property!"); 743 } 744 } 745 746 return false; 747} 748 749 750//===----------------------------------------------------------------------===// 751// GlobalValue Reference/Resolution Routines. 752//===----------------------------------------------------------------------===// 753 754/// GetGlobalVal - Get a value with the specified name or ID, creating a 755/// forward reference record if needed. This can return null if the value 756/// exists but does not have the right type. 757GlobalValue *LLParser::GetGlobalVal(const std::string &Name, const Type *Ty, 758 LocTy Loc) { 759 const PointerType *PTy = dyn_cast<PointerType>(Ty); 760 if (PTy == 0) { 761 Error(Loc, "global variable reference must have pointer type"); 762 return 0; 763 } 764 765 // Look this name up in the normal function symbol table. 766 GlobalValue *Val = 767 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name)); 768 769 // If this is a forward reference for the value, see if we already created a 770 // forward ref record. 771 if (Val == 0) { 772 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 773 I = ForwardRefVals.find(Name); 774 if (I != ForwardRefVals.end()) 775 Val = I->second.first; 776 } 777 778 // If we have the value in the symbol table or fwd-ref table, return it. 779 if (Val) { 780 if (Val->getType() == Ty) return Val; 781 Error(Loc, "'@" + Name + "' defined with type '" + 782 Val->getType()->getDescription() + "'"); 783 return 0; 784 } 785 786 // Otherwise, create a new forward reference for this value and remember it. 787 GlobalValue *FwdVal; 788 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 789 // Function types can return opaque but functions can't. 790 if (isa<OpaqueType>(FT->getReturnType())) { 791 Error(Loc, "function may not return opaque type"); 792 return 0; 793 } 794 795 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M); 796 } else { 797 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 798 GlobalValue::ExternalWeakLinkage, 0, Name); 799 } 800 801 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 802 return FwdVal; 803} 804 805GlobalValue *LLParser::GetGlobalVal(unsigned ID, const Type *Ty, LocTy Loc) { 806 const PointerType *PTy = dyn_cast<PointerType>(Ty); 807 if (PTy == 0) { 808 Error(Loc, "global variable reference must have pointer type"); 809 return 0; 810 } 811 812 GlobalValue *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 813 814 // If this is a forward reference for the value, see if we already created a 815 // forward ref record. 816 if (Val == 0) { 817 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 818 I = ForwardRefValIDs.find(ID); 819 if (I != ForwardRefValIDs.end()) 820 Val = I->second.first; 821 } 822 823 // If we have the value in the symbol table or fwd-ref table, return it. 824 if (Val) { 825 if (Val->getType() == Ty) return Val; 826 Error(Loc, "'@" + utostr(ID) + "' defined with type '" + 827 Val->getType()->getDescription() + "'"); 828 return 0; 829 } 830 831 // Otherwise, create a new forward reference for this value and remember it. 832 GlobalValue *FwdVal; 833 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 834 // Function types can return opaque but functions can't. 835 if (isa<OpaqueType>(FT->getReturnType())) { 836 Error(Loc, "function may not return opaque type"); 837 return 0; 838 } 839 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, "", M); 840 } else { 841 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 842 GlobalValue::ExternalWeakLinkage, 0, ""); 843 } 844 845 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 846 return FwdVal; 847} 848 849 850//===----------------------------------------------------------------------===// 851// Helper Routines. 852//===----------------------------------------------------------------------===// 853 854/// ParseToken - If the current token has the specified kind, eat it and return 855/// success. Otherwise, emit the specified error and return failure. 856bool LLParser::ParseToken(lltok::Kind T, const char *ErrMsg) { 857 if (Lex.getKind() != T) 858 return TokError(ErrMsg); 859 Lex.Lex(); 860 return false; 861} 862 863/// ParseStringConstant 864/// ::= StringConstant 865bool LLParser::ParseStringConstant(std::string &Result) { 866 if (Lex.getKind() != lltok::StringConstant) 867 return TokError("expected string constant"); 868 Result = Lex.getStrVal(); 869 Lex.Lex(); 870 return false; 871} 872 873/// ParseUInt32 874/// ::= uint32 875bool LLParser::ParseUInt32(unsigned &Val) { 876 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned()) 877 return TokError("expected integer"); 878 uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(0xFFFFFFFFULL+1); 879 if (Val64 != unsigned(Val64)) 880 return TokError("expected 32-bit integer (too large)"); 881 Val = Val64; 882 Lex.Lex(); 883 return false; 884} 885 886 887/// ParseOptionalAddrSpace 888/// := /*empty*/ 889/// := 'addrspace' '(' uint32 ')' 890bool LLParser::ParseOptionalAddrSpace(unsigned &AddrSpace) { 891 AddrSpace = 0; 892 if (!EatIfPresent(lltok::kw_addrspace)) 893 return false; 894 return ParseToken(lltok::lparen, "expected '(' in address space") || 895 ParseUInt32(AddrSpace) || 896 ParseToken(lltok::rparen, "expected ')' in address space"); 897} 898 899/// ParseOptionalAttrs - Parse a potentially empty attribute list. AttrKind 900/// indicates what kind of attribute list this is: 0: function arg, 1: result, 901/// 2: function attr. 902/// 3: function arg after value: FIXME: REMOVE IN LLVM 3.0 903bool LLParser::ParseOptionalAttrs(unsigned &Attrs, unsigned AttrKind) { 904 Attrs = Attribute::None; 905 LocTy AttrLoc = Lex.getLoc(); 906 907 while (1) { 908 switch (Lex.getKind()) { 909 case lltok::kw_sext: 910 case lltok::kw_zext: 911 // Treat these as signext/zeroext if they occur in the argument list after 912 // the value, as in "call i8 @foo(i8 10 sext)". If they occur before the 913 // value, as in "call i8 @foo(i8 sext (" then it is part of a constant 914 // expr. 915 // FIXME: REMOVE THIS IN LLVM 3.0 916 if (AttrKind == 3) { 917 if (Lex.getKind() == lltok::kw_sext) 918 Attrs |= Attribute::SExt; 919 else 920 Attrs |= Attribute::ZExt; 921 break; 922 } 923 // FALL THROUGH. 924 default: // End of attributes. 925 if (AttrKind != 2 && (Attrs & Attribute::FunctionOnly)) 926 return Error(AttrLoc, "invalid use of function-only attribute"); 927 928 if (AttrKind != 0 && AttrKind != 3 && (Attrs & Attribute::ParameterOnly)) 929 return Error(AttrLoc, "invalid use of parameter-only attribute"); 930 931 return false; 932 case lltok::kw_zeroext: Attrs |= Attribute::ZExt; break; 933 case lltok::kw_signext: Attrs |= Attribute::SExt; break; 934 case lltok::kw_inreg: Attrs |= Attribute::InReg; break; 935 case lltok::kw_sret: Attrs |= Attribute::StructRet; break; 936 case lltok::kw_noalias: Attrs |= Attribute::NoAlias; break; 937 case lltok::kw_nocapture: Attrs |= Attribute::NoCapture; break; 938 case lltok::kw_byval: Attrs |= Attribute::ByVal; break; 939 case lltok::kw_nest: Attrs |= Attribute::Nest; break; 940 941 case lltok::kw_noreturn: Attrs |= Attribute::NoReturn; break; 942 case lltok::kw_nounwind: Attrs |= Attribute::NoUnwind; break; 943 case lltok::kw_noinline: Attrs |= Attribute::NoInline; break; 944 case lltok::kw_readnone: Attrs |= Attribute::ReadNone; break; 945 case lltok::kw_readonly: Attrs |= Attribute::ReadOnly; break; 946 case lltok::kw_inlinehint: Attrs |= Attribute::InlineHint; break; 947 case lltok::kw_alwaysinline: Attrs |= Attribute::AlwaysInline; break; 948 case lltok::kw_optsize: Attrs |= Attribute::OptimizeForSize; break; 949 case lltok::kw_ssp: Attrs |= Attribute::StackProtect; break; 950 case lltok::kw_sspreq: Attrs |= Attribute::StackProtectReq; break; 951 case lltok::kw_noredzone: Attrs |= Attribute::NoRedZone; break; 952 case lltok::kw_noimplicitfloat: Attrs |= Attribute::NoImplicitFloat; break; 953 case lltok::kw_naked: Attrs |= Attribute::Naked; break; 954 955 case lltok::kw_align: { 956 unsigned Alignment; 957 if (ParseOptionalAlignment(Alignment)) 958 return true; 959 Attrs |= Attribute::constructAlignmentFromInt(Alignment); 960 continue; 961 } 962 } 963 Lex.Lex(); 964 } 965} 966 967/// ParseOptionalLinkage 968/// ::= /*empty*/ 969/// ::= 'private' 970/// ::= 'linker_private' 971/// ::= 'internal' 972/// ::= 'weak' 973/// ::= 'weak_odr' 974/// ::= 'linkonce' 975/// ::= 'linkonce_odr' 976/// ::= 'appending' 977/// ::= 'dllexport' 978/// ::= 'common' 979/// ::= 'dllimport' 980/// ::= 'extern_weak' 981/// ::= 'external' 982bool LLParser::ParseOptionalLinkage(unsigned &Res, bool &HasLinkage) { 983 HasLinkage = false; 984 switch (Lex.getKind()) { 985 default: Res=GlobalValue::ExternalLinkage; return false; 986 case lltok::kw_private: Res = GlobalValue::PrivateLinkage; break; 987 case lltok::kw_linker_private: Res = GlobalValue::LinkerPrivateLinkage; break; 988 case lltok::kw_internal: Res = GlobalValue::InternalLinkage; break; 989 case lltok::kw_weak: Res = GlobalValue::WeakAnyLinkage; break; 990 case lltok::kw_weak_odr: Res = GlobalValue::WeakODRLinkage; break; 991 case lltok::kw_linkonce: Res = GlobalValue::LinkOnceAnyLinkage; break; 992 case lltok::kw_linkonce_odr: Res = GlobalValue::LinkOnceODRLinkage; break; 993 case lltok::kw_available_externally: 994 Res = GlobalValue::AvailableExternallyLinkage; 995 break; 996 case lltok::kw_appending: Res = GlobalValue::AppendingLinkage; break; 997 case lltok::kw_dllexport: Res = GlobalValue::DLLExportLinkage; break; 998 case lltok::kw_common: Res = GlobalValue::CommonLinkage; break; 999 case lltok::kw_dllimport: Res = GlobalValue::DLLImportLinkage; break; 1000 case lltok::kw_extern_weak: Res = GlobalValue::ExternalWeakLinkage; break; 1001 case lltok::kw_external: Res = GlobalValue::ExternalLinkage; break; 1002 } 1003 Lex.Lex(); 1004 HasLinkage = true; 1005 return false; 1006} 1007 1008/// ParseOptionalVisibility 1009/// ::= /*empty*/ 1010/// ::= 'default' 1011/// ::= 'hidden' 1012/// ::= 'protected' 1013/// 1014bool LLParser::ParseOptionalVisibility(unsigned &Res) { 1015 switch (Lex.getKind()) { 1016 default: Res = GlobalValue::DefaultVisibility; return false; 1017 case lltok::kw_default: Res = GlobalValue::DefaultVisibility; break; 1018 case lltok::kw_hidden: Res = GlobalValue::HiddenVisibility; break; 1019 case lltok::kw_protected: Res = GlobalValue::ProtectedVisibility; break; 1020 } 1021 Lex.Lex(); 1022 return false; 1023} 1024 1025/// ParseOptionalCallingConv 1026/// ::= /*empty*/ 1027/// ::= 'ccc' 1028/// ::= 'fastcc' 1029/// ::= 'coldcc' 1030/// ::= 'x86_stdcallcc' 1031/// ::= 'x86_fastcallcc' 1032/// ::= 'arm_apcscc' 1033/// ::= 'arm_aapcscc' 1034/// ::= 'arm_aapcs_vfpcc' 1035/// ::= 'msp430_intrcc' 1036/// ::= 'cc' UINT 1037/// 1038bool LLParser::ParseOptionalCallingConv(CallingConv::ID &CC) { 1039 switch (Lex.getKind()) { 1040 default: CC = CallingConv::C; return false; 1041 case lltok::kw_ccc: CC = CallingConv::C; break; 1042 case lltok::kw_fastcc: CC = CallingConv::Fast; break; 1043 case lltok::kw_coldcc: CC = CallingConv::Cold; break; 1044 case lltok::kw_x86_stdcallcc: CC = CallingConv::X86_StdCall; break; 1045 case lltok::kw_x86_fastcallcc: CC = CallingConv::X86_FastCall; break; 1046 case lltok::kw_arm_apcscc: CC = CallingConv::ARM_APCS; break; 1047 case lltok::kw_arm_aapcscc: CC = CallingConv::ARM_AAPCS; break; 1048 case lltok::kw_arm_aapcs_vfpcc:CC = CallingConv::ARM_AAPCS_VFP; break; 1049 case lltok::kw_msp430_intrcc: CC = CallingConv::MSP430_INTR; break; 1050 case lltok::kw_cc: { 1051 unsigned ArbitraryCC; 1052 Lex.Lex(); 1053 if (ParseUInt32(ArbitraryCC)) { 1054 return true; 1055 } else 1056 CC = static_cast<CallingConv::ID>(ArbitraryCC); 1057 return false; 1058 } 1059 break; 1060 } 1061 1062 Lex.Lex(); 1063 return false; 1064} 1065 1066/// ParseOptionalCustomMetadata 1067/// ::= /* empty */ 1068/// ::= !dbg !42 (',' !dbg !57)* 1069bool LLParser::ParseOptionalCustomMetadata() { 1070 if (Lex.getKind() != lltok::MetadataVar) 1071 return false; 1072 1073 while (1) { 1074 std::string Name = Lex.getStrVal(); 1075 Lex.Lex(); 1076 1077 MDNode *Node; 1078 if (ParseToken(lltok::exclaim, "expected '!' here") || 1079 ParseMDNodeID(Node)) 1080 return true; 1081 1082 unsigned MDK = M->getMDKindID(Name.c_str()); 1083 MDsOnInst.push_back(std::make_pair(MDK, Node)); 1084 1085 // If this is the end of the list, we're done. 1086 if (!EatIfPresent(lltok::comma)) 1087 return false; 1088 1089 // The next value must be a custom metadata id. 1090 if (Lex.getKind() != lltok::MetadataVar) 1091 return TokError("expected more custom metadata ids"); 1092 } 1093} 1094 1095/// ParseOptionalAlignment 1096/// ::= /* empty */ 1097/// ::= 'align' 4 1098bool LLParser::ParseOptionalAlignment(unsigned &Alignment) { 1099 Alignment = 0; 1100 if (!EatIfPresent(lltok::kw_align)) 1101 return false; 1102 LocTy AlignLoc = Lex.getLoc(); 1103 if (ParseUInt32(Alignment)) return true; 1104 if (!isPowerOf2_32(Alignment)) 1105 return Error(AlignLoc, "alignment is not a power of two"); 1106 return false; 1107} 1108 1109/// ParseOptionalInfo 1110/// ::= OptionalInfo (',' OptionalInfo)+ 1111bool LLParser::ParseOptionalInfo(unsigned &Alignment) { 1112 1113 // FIXME: Handle customized metadata info attached with an instruction. 1114 do { 1115 if (Lex.getKind() == lltok::MetadataVar) { 1116 if (ParseOptionalCustomMetadata()) return true; 1117 } else if (Lex.getKind() == lltok::kw_align) { 1118 if (ParseOptionalAlignment(Alignment)) return true; 1119 } else 1120 return true; 1121 } while (EatIfPresent(lltok::comma)); 1122 1123 return false; 1124} 1125 1126 1127/// ParseIndexList - This parses the index list for an insert/extractvalue 1128/// instruction. This sets AteExtraComma in the case where we eat an extra 1129/// comma at the end of the line and find that it is followed by metadata. 1130/// Clients that don't allow metadata can call the version of this function that 1131/// only takes one argument. 1132/// 1133/// ParseIndexList 1134/// ::= (',' uint32)+ 1135/// 1136bool LLParser::ParseIndexList(SmallVectorImpl<unsigned> &Indices, 1137 bool &AteExtraComma) { 1138 AteExtraComma = false; 1139 1140 if (Lex.getKind() != lltok::comma) 1141 return TokError("expected ',' as start of index list"); 1142 1143 while (EatIfPresent(lltok::comma)) { 1144 if (Lex.getKind() == lltok::MetadataVar) { 1145 AteExtraComma = true; 1146 return false; 1147 } 1148 unsigned Idx; 1149 if (ParseUInt32(Idx)) return true; 1150 Indices.push_back(Idx); 1151 } 1152 1153 return false; 1154} 1155 1156//===----------------------------------------------------------------------===// 1157// Type Parsing. 1158//===----------------------------------------------------------------------===// 1159 1160/// ParseType - Parse and resolve a full type. 1161bool LLParser::ParseType(PATypeHolder &Result, bool AllowVoid) { 1162 LocTy TypeLoc = Lex.getLoc(); 1163 if (ParseTypeRec(Result)) return true; 1164 1165 // Verify no unresolved uprefs. 1166 if (!UpRefs.empty()) 1167 return Error(UpRefs.back().Loc, "invalid unresolved type up reference"); 1168 1169 if (!AllowVoid && Result.get()->isVoidTy()) 1170 return Error(TypeLoc, "void type only allowed for function results"); 1171 1172 return false; 1173} 1174 1175/// HandleUpRefs - Every time we finish a new layer of types, this function is 1176/// called. It loops through the UpRefs vector, which is a list of the 1177/// currently active types. For each type, if the up-reference is contained in 1178/// the newly completed type, we decrement the level count. When the level 1179/// count reaches zero, the up-referenced type is the type that is passed in: 1180/// thus we can complete the cycle. 1181/// 1182PATypeHolder LLParser::HandleUpRefs(const Type *ty) { 1183 // If Ty isn't abstract, or if there are no up-references in it, then there is 1184 // nothing to resolve here. 1185 if (!ty->isAbstract() || UpRefs.empty()) return ty; 1186 1187 PATypeHolder Ty(ty); 1188#if 0 1189 dbgs() << "Type '" << Ty->getDescription() 1190 << "' newly formed. Resolving upreferences.\n" 1191 << UpRefs.size() << " upreferences active!\n"; 1192#endif 1193 1194 // If we find any resolvable upreferences (i.e., those whose NestingLevel goes 1195 // to zero), we resolve them all together before we resolve them to Ty. At 1196 // the end of the loop, if there is anything to resolve to Ty, it will be in 1197 // this variable. 1198 OpaqueType *TypeToResolve = 0; 1199 1200 for (unsigned i = 0; i != UpRefs.size(); ++i) { 1201 // Determine if 'Ty' directly contains this up-references 'LastContainedTy'. 1202 bool ContainsType = 1203 std::find(Ty->subtype_begin(), Ty->subtype_end(), 1204 UpRefs[i].LastContainedTy) != Ty->subtype_end(); 1205 1206#if 0 1207 dbgs() << " UR#" << i << " - TypeContains(" << Ty->getDescription() << ", " 1208 << UpRefs[i].LastContainedTy->getDescription() << ") = " 1209 << (ContainsType ? "true" : "false") 1210 << " level=" << UpRefs[i].NestingLevel << "\n"; 1211#endif 1212 if (!ContainsType) 1213 continue; 1214 1215 // Decrement level of upreference 1216 unsigned Level = --UpRefs[i].NestingLevel; 1217 UpRefs[i].LastContainedTy = Ty; 1218 1219 // If the Up-reference has a non-zero level, it shouldn't be resolved yet. 1220 if (Level != 0) 1221 continue; 1222 1223#if 0 1224 dbgs() << " * Resolving upreference for " << UpRefs[i].UpRefTy << "\n"; 1225#endif 1226 if (!TypeToResolve) 1227 TypeToResolve = UpRefs[i].UpRefTy; 1228 else 1229 UpRefs[i].UpRefTy->refineAbstractTypeTo(TypeToResolve); 1230 UpRefs.erase(UpRefs.begin()+i); // Remove from upreference list. 1231 --i; // Do not skip the next element. 1232 } 1233 1234 if (TypeToResolve) 1235 TypeToResolve->refineAbstractTypeTo(Ty); 1236 1237 return Ty; 1238} 1239 1240 1241/// ParseTypeRec - The recursive function used to process the internal 1242/// implementation details of types. 1243bool LLParser::ParseTypeRec(PATypeHolder &Result) { 1244 switch (Lex.getKind()) { 1245 default: 1246 return TokError("expected type"); 1247 case lltok::Type: 1248 // TypeRec ::= 'float' | 'void' (etc) 1249 Result = Lex.getTyVal(); 1250 Lex.Lex(); 1251 break; 1252 case lltok::kw_opaque: 1253 // TypeRec ::= 'opaque' 1254 Result = OpaqueType::get(Context); 1255 Lex.Lex(); 1256 break; 1257 case lltok::lbrace: 1258 // TypeRec ::= '{' ... '}' 1259 if (ParseStructType(Result, false)) 1260 return true; 1261 break; 1262 case lltok::lsquare: 1263 // TypeRec ::= '[' ... ']' 1264 Lex.Lex(); // eat the lsquare. 1265 if (ParseArrayVectorType(Result, false)) 1266 return true; 1267 break; 1268 case lltok::less: // Either vector or packed struct. 1269 // TypeRec ::= '<' ... '>' 1270 Lex.Lex(); 1271 if (Lex.getKind() == lltok::lbrace) { 1272 if (ParseStructType(Result, true) || 1273 ParseToken(lltok::greater, "expected '>' at end of packed struct")) 1274 return true; 1275 } else if (ParseArrayVectorType(Result, true)) 1276 return true; 1277 break; 1278 case lltok::LocalVar: 1279 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0 1280 // TypeRec ::= %foo 1281 if (const Type *T = M->getTypeByName(Lex.getStrVal())) { 1282 Result = T; 1283 } else { 1284 Result = OpaqueType::get(Context); 1285 ForwardRefTypes.insert(std::make_pair(Lex.getStrVal(), 1286 std::make_pair(Result, 1287 Lex.getLoc()))); 1288 M->addTypeName(Lex.getStrVal(), Result.get()); 1289 } 1290 Lex.Lex(); 1291 break; 1292 1293 case lltok::LocalVarID: 1294 // TypeRec ::= %4 1295 if (Lex.getUIntVal() < NumberedTypes.size()) 1296 Result = NumberedTypes[Lex.getUIntVal()]; 1297 else { 1298 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 1299 I = ForwardRefTypeIDs.find(Lex.getUIntVal()); 1300 if (I != ForwardRefTypeIDs.end()) 1301 Result = I->second.first; 1302 else { 1303 Result = OpaqueType::get(Context); 1304 ForwardRefTypeIDs.insert(std::make_pair(Lex.getUIntVal(), 1305 std::make_pair(Result, 1306 Lex.getLoc()))); 1307 } 1308 } 1309 Lex.Lex(); 1310 break; 1311 case lltok::backslash: { 1312 // TypeRec ::= '\' 4 1313 Lex.Lex(); 1314 unsigned Val; 1315 if (ParseUInt32(Val)) return true; 1316 OpaqueType *OT = OpaqueType::get(Context); //Use temporary placeholder. 1317 UpRefs.push_back(UpRefRecord(Lex.getLoc(), Val, OT)); 1318 Result = OT; 1319 break; 1320 } 1321 } 1322 1323 // Parse the type suffixes. 1324 while (1) { 1325 switch (Lex.getKind()) { 1326 // End of type. 1327 default: return false; 1328 1329 // TypeRec ::= TypeRec '*' 1330 case lltok::star: 1331 if (Result.get()->isLabelTy()) 1332 return TokError("basic block pointers are invalid"); 1333 if (Result.get()->isVoidTy()) 1334 return TokError("pointers to void are invalid; use i8* instead"); 1335 if (!PointerType::isValidElementType(Result.get())) 1336 return TokError("pointer to this type is invalid"); 1337 Result = HandleUpRefs(PointerType::getUnqual(Result.get())); 1338 Lex.Lex(); 1339 break; 1340 1341 // TypeRec ::= TypeRec 'addrspace' '(' uint32 ')' '*' 1342 case lltok::kw_addrspace: { 1343 if (Result.get()->isLabelTy()) 1344 return TokError("basic block pointers are invalid"); 1345 if (Result.get()->isVoidTy()) 1346 return TokError("pointers to void are invalid; use i8* instead"); 1347 if (!PointerType::isValidElementType(Result.get())) 1348 return TokError("pointer to this type is invalid"); 1349 unsigned AddrSpace; 1350 if (ParseOptionalAddrSpace(AddrSpace) || 1351 ParseToken(lltok::star, "expected '*' in address space")) 1352 return true; 1353 1354 Result = HandleUpRefs(PointerType::get(Result.get(), AddrSpace)); 1355 break; 1356 } 1357 1358 /// Types '(' ArgTypeListI ')' OptFuncAttrs 1359 case lltok::lparen: 1360 if (ParseFunctionType(Result)) 1361 return true; 1362 break; 1363 } 1364 } 1365} 1366 1367/// ParseParameterList 1368/// ::= '(' ')' 1369/// ::= '(' Arg (',' Arg)* ')' 1370/// Arg 1371/// ::= Type OptionalAttributes Value OptionalAttributes 1372bool LLParser::ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList, 1373 PerFunctionState &PFS) { 1374 if (ParseToken(lltok::lparen, "expected '(' in call")) 1375 return true; 1376 1377 while (Lex.getKind() != lltok::rparen) { 1378 // If this isn't the first argument, we need a comma. 1379 if (!ArgList.empty() && 1380 ParseToken(lltok::comma, "expected ',' in argument list")) 1381 return true; 1382 1383 // Parse the argument. 1384 LocTy ArgLoc; 1385 PATypeHolder ArgTy(Type::getVoidTy(Context)); 1386 unsigned ArgAttrs1 = Attribute::None; 1387 unsigned ArgAttrs2 = Attribute::None; 1388 Value *V; 1389 if (ParseType(ArgTy, ArgLoc)) 1390 return true; 1391 1392 // Otherwise, handle normal operands. 1393 if (ParseOptionalAttrs(ArgAttrs1, 0) || 1394 ParseValue(ArgTy, V, PFS) || 1395 // FIXME: Should not allow attributes after the argument, remove this 1396 // in LLVM 3.0. 1397 ParseOptionalAttrs(ArgAttrs2, 3)) 1398 return true; 1399 ArgList.push_back(ParamInfo(ArgLoc, V, ArgAttrs1|ArgAttrs2)); 1400 } 1401 1402 Lex.Lex(); // Lex the ')'. 1403 return false; 1404} 1405 1406 1407 1408/// ParseArgumentList - Parse the argument list for a function type or function 1409/// prototype. If 'inType' is true then we are parsing a FunctionType. 1410/// ::= '(' ArgTypeListI ')' 1411/// ArgTypeListI 1412/// ::= /*empty*/ 1413/// ::= '...' 1414/// ::= ArgTypeList ',' '...' 1415/// ::= ArgType (',' ArgType)* 1416/// 1417bool LLParser::ParseArgumentList(std::vector<ArgInfo> &ArgList, 1418 bool &isVarArg, bool inType) { 1419 isVarArg = false; 1420 assert(Lex.getKind() == lltok::lparen); 1421 Lex.Lex(); // eat the (. 1422 1423 if (Lex.getKind() == lltok::rparen) { 1424 // empty 1425 } else if (Lex.getKind() == lltok::dotdotdot) { 1426 isVarArg = true; 1427 Lex.Lex(); 1428 } else { 1429 LocTy TypeLoc = Lex.getLoc(); 1430 PATypeHolder ArgTy(Type::getVoidTy(Context)); 1431 unsigned Attrs; 1432 std::string Name; 1433 1434 // If we're parsing a type, use ParseTypeRec, because we allow recursive 1435 // types (such as a function returning a pointer to itself). If parsing a 1436 // function prototype, we require fully resolved types. 1437 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1438 ParseOptionalAttrs(Attrs, 0)) return true; 1439 1440 if (ArgTy->isVoidTy()) 1441 return Error(TypeLoc, "argument can not have void type"); 1442 1443 if (Lex.getKind() == lltok::LocalVar || 1444 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1445 Name = Lex.getStrVal(); 1446 Lex.Lex(); 1447 } 1448 1449 if (!FunctionType::isValidArgumentType(ArgTy)) 1450 return Error(TypeLoc, "invalid type for function argument"); 1451 1452 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1453 1454 while (EatIfPresent(lltok::comma)) { 1455 // Handle ... at end of arg list. 1456 if (EatIfPresent(lltok::dotdotdot)) { 1457 isVarArg = true; 1458 break; 1459 } 1460 1461 // Otherwise must be an argument type. 1462 TypeLoc = Lex.getLoc(); 1463 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1464 ParseOptionalAttrs(Attrs, 0)) return true; 1465 1466 if (ArgTy->isVoidTy()) 1467 return Error(TypeLoc, "argument can not have void type"); 1468 1469 if (Lex.getKind() == lltok::LocalVar || 1470 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1471 Name = Lex.getStrVal(); 1472 Lex.Lex(); 1473 } else { 1474 Name = ""; 1475 } 1476 1477 if (!ArgTy->isFirstClassType() && !isa<OpaqueType>(ArgTy)) 1478 return Error(TypeLoc, "invalid type for function argument"); 1479 1480 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1481 } 1482 } 1483 1484 return ParseToken(lltok::rparen, "expected ')' at end of argument list"); 1485} 1486 1487/// ParseFunctionType 1488/// ::= Type ArgumentList OptionalAttrs 1489bool LLParser::ParseFunctionType(PATypeHolder &Result) { 1490 assert(Lex.getKind() == lltok::lparen); 1491 1492 if (!FunctionType::isValidReturnType(Result)) 1493 return TokError("invalid function return type"); 1494 1495 std::vector<ArgInfo> ArgList; 1496 bool isVarArg; 1497 unsigned Attrs; 1498 if (ParseArgumentList(ArgList, isVarArg, true) || 1499 // FIXME: Allow, but ignore attributes on function types! 1500 // FIXME: Remove in LLVM 3.0 1501 ParseOptionalAttrs(Attrs, 2)) 1502 return true; 1503 1504 // Reject names on the arguments lists. 1505 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 1506 if (!ArgList[i].Name.empty()) 1507 return Error(ArgList[i].Loc, "argument name invalid in function type"); 1508 if (!ArgList[i].Attrs != 0) { 1509 // Allow but ignore attributes on function types; this permits 1510 // auto-upgrade. 1511 // FIXME: REJECT ATTRIBUTES ON FUNCTION TYPES in LLVM 3.0 1512 } 1513 } 1514 1515 std::vector<const Type*> ArgListTy; 1516 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 1517 ArgListTy.push_back(ArgList[i].Type); 1518 1519 Result = HandleUpRefs(FunctionType::get(Result.get(), 1520 ArgListTy, isVarArg)); 1521 return false; 1522} 1523 1524/// ParseStructType: Handles packed and unpacked types. </> parsed elsewhere. 1525/// TypeRec 1526/// ::= '{' '}' 1527/// ::= '{' TypeRec (',' TypeRec)* '}' 1528/// ::= '<' '{' '}' '>' 1529/// ::= '<' '{' TypeRec (',' TypeRec)* '}' '>' 1530bool LLParser::ParseStructType(PATypeHolder &Result, bool Packed) { 1531 assert(Lex.getKind() == lltok::lbrace); 1532 Lex.Lex(); // Consume the '{' 1533 1534 if (EatIfPresent(lltok::rbrace)) { 1535 Result = StructType::get(Context, Packed); 1536 return false; 1537 } 1538 1539 std::vector<PATypeHolder> ParamsList; 1540 LocTy EltTyLoc = Lex.getLoc(); 1541 if (ParseTypeRec(Result)) return true; 1542 ParamsList.push_back(Result); 1543 1544 if (Result->isVoidTy()) 1545 return Error(EltTyLoc, "struct element can not have void type"); 1546 if (!StructType::isValidElementType(Result)) 1547 return Error(EltTyLoc, "invalid element type for struct"); 1548 1549 while (EatIfPresent(lltok::comma)) { 1550 EltTyLoc = Lex.getLoc(); 1551 if (ParseTypeRec(Result)) return true; 1552 1553 if (Result->isVoidTy()) 1554 return Error(EltTyLoc, "struct element can not have void type"); 1555 if (!StructType::isValidElementType(Result)) 1556 return Error(EltTyLoc, "invalid element type for struct"); 1557 1558 ParamsList.push_back(Result); 1559 } 1560 1561 if (ParseToken(lltok::rbrace, "expected '}' at end of struct")) 1562 return true; 1563 1564 std::vector<const Type*> ParamsListTy; 1565 for (unsigned i = 0, e = ParamsList.size(); i != e; ++i) 1566 ParamsListTy.push_back(ParamsList[i].get()); 1567 Result = HandleUpRefs(StructType::get(Context, ParamsListTy, Packed)); 1568 return false; 1569} 1570 1571/// ParseArrayVectorType - Parse an array or vector type, assuming the first 1572/// token has already been consumed. 1573/// TypeRec 1574/// ::= '[' APSINTVAL 'x' Types ']' 1575/// ::= '<' APSINTVAL 'x' Types '>' 1576bool LLParser::ParseArrayVectorType(PATypeHolder &Result, bool isVector) { 1577 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned() || 1578 Lex.getAPSIntVal().getBitWidth() > 64) 1579 return TokError("expected number in address space"); 1580 1581 LocTy SizeLoc = Lex.getLoc(); 1582 uint64_t Size = Lex.getAPSIntVal().getZExtValue(); 1583 Lex.Lex(); 1584 1585 if (ParseToken(lltok::kw_x, "expected 'x' after element count")) 1586 return true; 1587 1588 LocTy TypeLoc = Lex.getLoc(); 1589 PATypeHolder EltTy(Type::getVoidTy(Context)); 1590 if (ParseTypeRec(EltTy)) return true; 1591 1592 if (EltTy->isVoidTy()) 1593 return Error(TypeLoc, "array and vector element type cannot be void"); 1594 1595 if (ParseToken(isVector ? lltok::greater : lltok::rsquare, 1596 "expected end of sequential type")) 1597 return true; 1598 1599 if (isVector) { 1600 if (Size == 0) 1601 return Error(SizeLoc, "zero element vector is illegal"); 1602 if ((unsigned)Size != Size) 1603 return Error(SizeLoc, "size too large for vector"); 1604 if (!VectorType::isValidElementType(EltTy)) 1605 return Error(TypeLoc, "vector element type must be fp or integer"); 1606 Result = VectorType::get(EltTy, unsigned(Size)); 1607 } else { 1608 if (!ArrayType::isValidElementType(EltTy)) 1609 return Error(TypeLoc, "invalid array element type"); 1610 Result = HandleUpRefs(ArrayType::get(EltTy, Size)); 1611 } 1612 return false; 1613} 1614 1615//===----------------------------------------------------------------------===// 1616// Function Semantic Analysis. 1617//===----------------------------------------------------------------------===// 1618 1619LLParser::PerFunctionState::PerFunctionState(LLParser &p, Function &f, 1620 int functionNumber) 1621 : P(p), F(f), FunctionNumber(functionNumber) { 1622 1623 // Insert unnamed arguments into the NumberedVals list. 1624 for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 1625 AI != E; ++AI) 1626 if (!AI->hasName()) 1627 NumberedVals.push_back(AI); 1628} 1629 1630LLParser::PerFunctionState::~PerFunctionState() { 1631 // If there were any forward referenced non-basicblock values, delete them. 1632 for (std::map<std::string, std::pair<Value*, LocTy> >::iterator 1633 I = ForwardRefVals.begin(), E = ForwardRefVals.end(); I != E; ++I) 1634 if (!isa<BasicBlock>(I->second.first)) { 1635 I->second.first->replaceAllUsesWith( 1636 UndefValue::get(I->second.first->getType())); 1637 delete I->second.first; 1638 I->second.first = 0; 1639 } 1640 1641 for (std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1642 I = ForwardRefValIDs.begin(), E = ForwardRefValIDs.end(); I != E; ++I) 1643 if (!isa<BasicBlock>(I->second.first)) { 1644 I->second.first->replaceAllUsesWith( 1645 UndefValue::get(I->second.first->getType())); 1646 delete I->second.first; 1647 I->second.first = 0; 1648 } 1649} 1650 1651bool LLParser::PerFunctionState::FinishFunction() { 1652 // Check to see if someone took the address of labels in this block. 1653 if (!P.ForwardRefBlockAddresses.empty()) { 1654 ValID FunctionID; 1655 if (!F.getName().empty()) { 1656 FunctionID.Kind = ValID::t_GlobalName; 1657 FunctionID.StrVal = F.getName(); 1658 } else { 1659 FunctionID.Kind = ValID::t_GlobalID; 1660 FunctionID.UIntVal = FunctionNumber; 1661 } 1662 1663 std::map<ValID, std::vector<std::pair<ValID, GlobalValue*> > >::iterator 1664 FRBAI = P.ForwardRefBlockAddresses.find(FunctionID); 1665 if (FRBAI != P.ForwardRefBlockAddresses.end()) { 1666 // Resolve all these references. 1667 if (P.ResolveForwardRefBlockAddresses(&F, FRBAI->second, this)) 1668 return true; 1669 1670 P.ForwardRefBlockAddresses.erase(FRBAI); 1671 } 1672 } 1673 1674 if (!ForwardRefVals.empty()) 1675 return P.Error(ForwardRefVals.begin()->second.second, 1676 "use of undefined value '%" + ForwardRefVals.begin()->first + 1677 "'"); 1678 if (!ForwardRefValIDs.empty()) 1679 return P.Error(ForwardRefValIDs.begin()->second.second, 1680 "use of undefined value '%" + 1681 utostr(ForwardRefValIDs.begin()->first) + "'"); 1682 return false; 1683} 1684 1685 1686/// GetVal - Get a value with the specified name or ID, creating a 1687/// forward reference record if needed. This can return null if the value 1688/// exists but does not have the right type. 1689Value *LLParser::PerFunctionState::GetVal(const std::string &Name, 1690 const Type *Ty, LocTy Loc) { 1691 // Look this name up in the normal function symbol table. 1692 Value *Val = F.getValueSymbolTable().lookup(Name); 1693 1694 // If this is a forward reference for the value, see if we already created a 1695 // forward ref record. 1696 if (Val == 0) { 1697 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1698 I = ForwardRefVals.find(Name); 1699 if (I != ForwardRefVals.end()) 1700 Val = I->second.first; 1701 } 1702 1703 // If we have the value in the symbol table or fwd-ref table, return it. 1704 if (Val) { 1705 if (Val->getType() == Ty) return Val; 1706 if (Ty->isLabelTy()) 1707 P.Error(Loc, "'%" + Name + "' is not a basic block"); 1708 else 1709 P.Error(Loc, "'%" + Name + "' defined with type '" + 1710 Val->getType()->getDescription() + "'"); 1711 return 0; 1712 } 1713 1714 // Don't make placeholders with invalid type. 1715 if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty) && 1716 Ty != Type::getLabelTy(F.getContext())) { 1717 P.Error(Loc, "invalid use of a non-first-class type"); 1718 return 0; 1719 } 1720 1721 // Otherwise, create a new forward reference for this value and remember it. 1722 Value *FwdVal; 1723 if (Ty->isLabelTy()) 1724 FwdVal = BasicBlock::Create(F.getContext(), Name, &F); 1725 else 1726 FwdVal = new Argument(Ty, Name); 1727 1728 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 1729 return FwdVal; 1730} 1731 1732Value *LLParser::PerFunctionState::GetVal(unsigned ID, const Type *Ty, 1733 LocTy Loc) { 1734 // Look this name up in the normal function symbol table. 1735 Value *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 1736 1737 // If this is a forward reference for the value, see if we already created a 1738 // forward ref record. 1739 if (Val == 0) { 1740 std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1741 I = ForwardRefValIDs.find(ID); 1742 if (I != ForwardRefValIDs.end()) 1743 Val = I->second.first; 1744 } 1745 1746 // If we have the value in the symbol table or fwd-ref table, return it. 1747 if (Val) { 1748 if (Val->getType() == Ty) return Val; 1749 if (Ty->isLabelTy()) 1750 P.Error(Loc, "'%" + utostr(ID) + "' is not a basic block"); 1751 else 1752 P.Error(Loc, "'%" + utostr(ID) + "' defined with type '" + 1753 Val->getType()->getDescription() + "'"); 1754 return 0; 1755 } 1756 1757 if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty) && 1758 Ty != Type::getLabelTy(F.getContext())) { 1759 P.Error(Loc, "invalid use of a non-first-class type"); 1760 return 0; 1761 } 1762 1763 // Otherwise, create a new forward reference for this value and remember it. 1764 Value *FwdVal; 1765 if (Ty->isLabelTy()) 1766 FwdVal = BasicBlock::Create(F.getContext(), "", &F); 1767 else 1768 FwdVal = new Argument(Ty); 1769 1770 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 1771 return FwdVal; 1772} 1773 1774/// SetInstName - After an instruction is parsed and inserted into its 1775/// basic block, this installs its name. 1776bool LLParser::PerFunctionState::SetInstName(int NameID, 1777 const std::string &NameStr, 1778 LocTy NameLoc, Instruction *Inst) { 1779 // If this instruction has void type, it cannot have a name or ID specified. 1780 if (Inst->getType()->isVoidTy()) { 1781 if (NameID != -1 || !NameStr.empty()) 1782 return P.Error(NameLoc, "instructions returning void cannot have a name"); 1783 return false; 1784 } 1785 1786 // If this was a numbered instruction, verify that the instruction is the 1787 // expected value and resolve any forward references. 1788 if (NameStr.empty()) { 1789 // If neither a name nor an ID was specified, just use the next ID. 1790 if (NameID == -1) 1791 NameID = NumberedVals.size(); 1792 1793 if (unsigned(NameID) != NumberedVals.size()) 1794 return P.Error(NameLoc, "instruction expected to be numbered '%" + 1795 utostr(NumberedVals.size()) + "'"); 1796 1797 std::map<unsigned, std::pair<Value*, LocTy> >::iterator FI = 1798 ForwardRefValIDs.find(NameID); 1799 if (FI != ForwardRefValIDs.end()) { 1800 if (FI->second.first->getType() != Inst->getType()) 1801 return P.Error(NameLoc, "instruction forward referenced with type '" + 1802 FI->second.first->getType()->getDescription() + "'"); 1803 FI->second.first->replaceAllUsesWith(Inst); 1804 delete FI->second.first; 1805 ForwardRefValIDs.erase(FI); 1806 } 1807 1808 NumberedVals.push_back(Inst); 1809 return false; 1810 } 1811 1812 // Otherwise, the instruction had a name. Resolve forward refs and set it. 1813 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1814 FI = ForwardRefVals.find(NameStr); 1815 if (FI != ForwardRefVals.end()) { 1816 if (FI->second.first->getType() != Inst->getType()) 1817 return P.Error(NameLoc, "instruction forward referenced with type '" + 1818 FI->second.first->getType()->getDescription() + "'"); 1819 FI->second.first->replaceAllUsesWith(Inst); 1820 delete FI->second.first; 1821 ForwardRefVals.erase(FI); 1822 } 1823 1824 // Set the name on the instruction. 1825 Inst->setName(NameStr); 1826 1827 if (Inst->getNameStr() != NameStr) 1828 return P.Error(NameLoc, "multiple definition of local value named '" + 1829 NameStr + "'"); 1830 return false; 1831} 1832 1833/// GetBB - Get a basic block with the specified name or ID, creating a 1834/// forward reference record if needed. 1835BasicBlock *LLParser::PerFunctionState::GetBB(const std::string &Name, 1836 LocTy Loc) { 1837 return cast_or_null<BasicBlock>(GetVal(Name, 1838 Type::getLabelTy(F.getContext()), Loc)); 1839} 1840 1841BasicBlock *LLParser::PerFunctionState::GetBB(unsigned ID, LocTy Loc) { 1842 return cast_or_null<BasicBlock>(GetVal(ID, 1843 Type::getLabelTy(F.getContext()), Loc)); 1844} 1845 1846/// DefineBB - Define the specified basic block, which is either named or 1847/// unnamed. If there is an error, this returns null otherwise it returns 1848/// the block being defined. 1849BasicBlock *LLParser::PerFunctionState::DefineBB(const std::string &Name, 1850 LocTy Loc) { 1851 BasicBlock *BB; 1852 if (Name.empty()) 1853 BB = GetBB(NumberedVals.size(), Loc); 1854 else 1855 BB = GetBB(Name, Loc); 1856 if (BB == 0) return 0; // Already diagnosed error. 1857 1858 // Move the block to the end of the function. Forward ref'd blocks are 1859 // inserted wherever they happen to be referenced. 1860 F.getBasicBlockList().splice(F.end(), F.getBasicBlockList(), BB); 1861 1862 // Remove the block from forward ref sets. 1863 if (Name.empty()) { 1864 ForwardRefValIDs.erase(NumberedVals.size()); 1865 NumberedVals.push_back(BB); 1866 } else { 1867 // BB forward references are already in the function symbol table. 1868 ForwardRefVals.erase(Name); 1869 } 1870 1871 return BB; 1872} 1873 1874//===----------------------------------------------------------------------===// 1875// Constants. 1876//===----------------------------------------------------------------------===// 1877 1878/// ParseValID - Parse an abstract value that doesn't necessarily have a 1879/// type implied. For example, if we parse "4" we don't know what integer type 1880/// it has. The value will later be combined with its type and checked for 1881/// sanity. 1882bool LLParser::ParseValID(ValID &ID) { 1883 ID.Loc = Lex.getLoc(); 1884 switch (Lex.getKind()) { 1885 default: return TokError("expected value token"); 1886 case lltok::GlobalID: // @42 1887 ID.UIntVal = Lex.getUIntVal(); 1888 ID.Kind = ValID::t_GlobalID; 1889 break; 1890 case lltok::GlobalVar: // @foo 1891 ID.StrVal = Lex.getStrVal(); 1892 ID.Kind = ValID::t_GlobalName; 1893 break; 1894 case lltok::LocalVarID: // %42 1895 ID.UIntVal = Lex.getUIntVal(); 1896 ID.Kind = ValID::t_LocalID; 1897 break; 1898 case lltok::LocalVar: // %foo 1899 case lltok::StringConstant: // "foo" - FIXME: REMOVE IN LLVM 3.0 1900 ID.StrVal = Lex.getStrVal(); 1901 ID.Kind = ValID::t_LocalName; 1902 break; 1903 case lltok::exclaim: // !{...} MDNode, !"foo" MDString 1904 Lex.Lex(); 1905 1906 // FIXME: This doesn't belong here. 1907 if (EatIfPresent(lltok::lbrace)) { 1908 SmallVector<Value*, 16> Elts; 1909 if (ParseMDNodeVector(Elts) || 1910 ParseToken(lltok::rbrace, "expected end of metadata node")) 1911 return true; 1912 1913 ID.MDNodeVal = MDNode::get(Context, Elts.data(), Elts.size()); 1914 ID.Kind = ValID::t_MDNode; 1915 return false; 1916 } 1917 1918 // Standalone metadata reference 1919 // !{ ..., !42, ... } 1920 if (Lex.getKind() == lltok::APSInt) { 1921 if (ParseMDNodeID(ID.MDNodeVal)) return true; 1922 ID.Kind = ValID::t_MDNode; 1923 return false; 1924 } 1925 1926 // MDString: 1927 // ::= '!' STRINGCONSTANT 1928 if (ParseMDString(ID.MDStringVal)) return true; 1929 ID.Kind = ValID::t_MDString; 1930 return false; 1931 case lltok::APSInt: 1932 ID.APSIntVal = Lex.getAPSIntVal(); 1933 ID.Kind = ValID::t_APSInt; 1934 break; 1935 case lltok::APFloat: 1936 ID.APFloatVal = Lex.getAPFloatVal(); 1937 ID.Kind = ValID::t_APFloat; 1938 break; 1939 case lltok::kw_true: 1940 ID.ConstantVal = ConstantInt::getTrue(Context); 1941 ID.Kind = ValID::t_Constant; 1942 break; 1943 case lltok::kw_false: 1944 ID.ConstantVal = ConstantInt::getFalse(Context); 1945 ID.Kind = ValID::t_Constant; 1946 break; 1947 case lltok::kw_null: ID.Kind = ValID::t_Null; break; 1948 case lltok::kw_undef: ID.Kind = ValID::t_Undef; break; 1949 case lltok::kw_zeroinitializer: ID.Kind = ValID::t_Zero; break; 1950 1951 case lltok::lbrace: { 1952 // ValID ::= '{' ConstVector '}' 1953 Lex.Lex(); 1954 SmallVector<Constant*, 16> Elts; 1955 if (ParseGlobalValueVector(Elts) || 1956 ParseToken(lltok::rbrace, "expected end of struct constant")) 1957 return true; 1958 1959 ID.ConstantVal = ConstantStruct::get(Context, Elts.data(), 1960 Elts.size(), false); 1961 ID.Kind = ValID::t_Constant; 1962 return false; 1963 } 1964 case lltok::less: { 1965 // ValID ::= '<' ConstVector '>' --> Vector. 1966 // ValID ::= '<' '{' ConstVector '}' '>' --> Packed Struct. 1967 Lex.Lex(); 1968 bool isPackedStruct = EatIfPresent(lltok::lbrace); 1969 1970 SmallVector<Constant*, 16> Elts; 1971 LocTy FirstEltLoc = Lex.getLoc(); 1972 if (ParseGlobalValueVector(Elts) || 1973 (isPackedStruct && 1974 ParseToken(lltok::rbrace, "expected end of packed struct")) || 1975 ParseToken(lltok::greater, "expected end of constant")) 1976 return true; 1977 1978 if (isPackedStruct) { 1979 ID.ConstantVal = 1980 ConstantStruct::get(Context, Elts.data(), Elts.size(), true); 1981 ID.Kind = ValID::t_Constant; 1982 return false; 1983 } 1984 1985 if (Elts.empty()) 1986 return Error(ID.Loc, "constant vector must not be empty"); 1987 1988 if (!Elts[0]->getType()->isInteger() && 1989 !Elts[0]->getType()->isFloatingPoint()) 1990 return Error(FirstEltLoc, 1991 "vector elements must have integer or floating point type"); 1992 1993 // Verify that all the vector elements have the same type. 1994 for (unsigned i = 1, e = Elts.size(); i != e; ++i) 1995 if (Elts[i]->getType() != Elts[0]->getType()) 1996 return Error(FirstEltLoc, 1997 "vector element #" + utostr(i) + 1998 " is not of type '" + Elts[0]->getType()->getDescription()); 1999 2000 ID.ConstantVal = ConstantVector::get(Elts.data(), Elts.size()); 2001 ID.Kind = ValID::t_Constant; 2002 return false; 2003 } 2004 case lltok::lsquare: { // Array Constant 2005 Lex.Lex(); 2006 SmallVector<Constant*, 16> Elts; 2007 LocTy FirstEltLoc = Lex.getLoc(); 2008 if (ParseGlobalValueVector(Elts) || 2009 ParseToken(lltok::rsquare, "expected end of array constant")) 2010 return true; 2011 2012 // Handle empty element. 2013 if (Elts.empty()) { 2014 // Use undef instead of an array because it's inconvenient to determine 2015 // the element type at this point, there being no elements to examine. 2016 ID.Kind = ValID::t_EmptyArray; 2017 return false; 2018 } 2019 2020 if (!Elts[0]->getType()->isFirstClassType()) 2021 return Error(FirstEltLoc, "invalid array element type: " + 2022 Elts[0]->getType()->getDescription()); 2023 2024 ArrayType *ATy = ArrayType::get(Elts[0]->getType(), Elts.size()); 2025 2026 // Verify all elements are correct type! 2027 for (unsigned i = 0, e = Elts.size(); i != e; ++i) { 2028 if (Elts[i]->getType() != Elts[0]->getType()) 2029 return Error(FirstEltLoc, 2030 "array element #" + utostr(i) + 2031 " is not of type '" +Elts[0]->getType()->getDescription()); 2032 } 2033 2034 ID.ConstantVal = ConstantArray::get(ATy, Elts.data(), Elts.size()); 2035 ID.Kind = ValID::t_Constant; 2036 return false; 2037 } 2038 case lltok::kw_c: // c "foo" 2039 Lex.Lex(); 2040 ID.ConstantVal = ConstantArray::get(Context, Lex.getStrVal(), false); 2041 if (ParseToken(lltok::StringConstant, "expected string")) return true; 2042 ID.Kind = ValID::t_Constant; 2043 return false; 2044 2045 case lltok::kw_asm: { 2046 // ValID ::= 'asm' SideEffect? AlignStack? STRINGCONSTANT ',' STRINGCONSTANT 2047 bool HasSideEffect, AlignStack; 2048 Lex.Lex(); 2049 if (ParseOptionalToken(lltok::kw_sideeffect, HasSideEffect) || 2050 ParseOptionalToken(lltok::kw_alignstack, AlignStack) || 2051 ParseStringConstant(ID.StrVal) || 2052 ParseToken(lltok::comma, "expected comma in inline asm expression") || 2053 ParseToken(lltok::StringConstant, "expected constraint string")) 2054 return true; 2055 ID.StrVal2 = Lex.getStrVal(); 2056 ID.UIntVal = unsigned(HasSideEffect) | (unsigned(AlignStack)<<1); 2057 ID.Kind = ValID::t_InlineAsm; 2058 return false; 2059 } 2060 2061 case lltok::kw_blockaddress: { 2062 // ValID ::= 'blockaddress' '(' @foo ',' %bar ')' 2063 Lex.Lex(); 2064 2065 ValID Fn, Label; 2066 LocTy FnLoc, LabelLoc; 2067 2068 if (ParseToken(lltok::lparen, "expected '(' in block address expression") || 2069 ParseValID(Fn) || 2070 ParseToken(lltok::comma, "expected comma in block address expression")|| 2071 ParseValID(Label) || 2072 ParseToken(lltok::rparen, "expected ')' in block address expression")) 2073 return true; 2074 2075 if (Fn.Kind != ValID::t_GlobalID && Fn.Kind != ValID::t_GlobalName) 2076 return Error(Fn.Loc, "expected function name in blockaddress"); 2077 if (Label.Kind != ValID::t_LocalID && Label.Kind != ValID::t_LocalName) 2078 return Error(Label.Loc, "expected basic block name in blockaddress"); 2079 2080 // Make a global variable as a placeholder for this reference. 2081 GlobalVariable *FwdRef = new GlobalVariable(*M, Type::getInt8Ty(Context), 2082 false, GlobalValue::InternalLinkage, 2083 0, ""); 2084 ForwardRefBlockAddresses[Fn].push_back(std::make_pair(Label, FwdRef)); 2085 ID.ConstantVal = FwdRef; 2086 ID.Kind = ValID::t_Constant; 2087 return false; 2088 } 2089 2090 case lltok::kw_trunc: 2091 case lltok::kw_zext: 2092 case lltok::kw_sext: 2093 case lltok::kw_fptrunc: 2094 case lltok::kw_fpext: 2095 case lltok::kw_bitcast: 2096 case lltok::kw_uitofp: 2097 case lltok::kw_sitofp: 2098 case lltok::kw_fptoui: 2099 case lltok::kw_fptosi: 2100 case lltok::kw_inttoptr: 2101 case lltok::kw_ptrtoint: { 2102 unsigned Opc = Lex.getUIntVal(); 2103 PATypeHolder DestTy(Type::getVoidTy(Context)); 2104 Constant *SrcVal; 2105 Lex.Lex(); 2106 if (ParseToken(lltok::lparen, "expected '(' after constantexpr cast") || 2107 ParseGlobalTypeAndValue(SrcVal) || 2108 ParseToken(lltok::kw_to, "expected 'to' in constantexpr cast") || 2109 ParseType(DestTy) || 2110 ParseToken(lltok::rparen, "expected ')' at end of constantexpr cast")) 2111 return true; 2112 if (!CastInst::castIsValid((Instruction::CastOps)Opc, SrcVal, DestTy)) 2113 return Error(ID.Loc, "invalid cast opcode for cast from '" + 2114 SrcVal->getType()->getDescription() + "' to '" + 2115 DestTy->getDescription() + "'"); 2116 ID.ConstantVal = ConstantExpr::getCast((Instruction::CastOps)Opc, 2117 SrcVal, DestTy); 2118 ID.Kind = ValID::t_Constant; 2119 return false; 2120 } 2121 case lltok::kw_extractvalue: { 2122 Lex.Lex(); 2123 Constant *Val; 2124 SmallVector<unsigned, 4> Indices; 2125 if (ParseToken(lltok::lparen, "expected '(' in extractvalue constantexpr")|| 2126 ParseGlobalTypeAndValue(Val) || 2127 ParseIndexList(Indices) || 2128 ParseToken(lltok::rparen, "expected ')' in extractvalue constantexpr")) 2129 return true; 2130 2131 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 2132 return Error(ID.Loc, "extractvalue operand must be array or struct"); 2133 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 2134 Indices.end())) 2135 return Error(ID.Loc, "invalid indices for extractvalue"); 2136 ID.ConstantVal = 2137 ConstantExpr::getExtractValue(Val, Indices.data(), Indices.size()); 2138 ID.Kind = ValID::t_Constant; 2139 return false; 2140 } 2141 case lltok::kw_insertvalue: { 2142 Lex.Lex(); 2143 Constant *Val0, *Val1; 2144 SmallVector<unsigned, 4> Indices; 2145 if (ParseToken(lltok::lparen, "expected '(' in insertvalue constantexpr")|| 2146 ParseGlobalTypeAndValue(Val0) || 2147 ParseToken(lltok::comma, "expected comma in insertvalue constantexpr")|| 2148 ParseGlobalTypeAndValue(Val1) || 2149 ParseIndexList(Indices) || 2150 ParseToken(lltok::rparen, "expected ')' in insertvalue constantexpr")) 2151 return true; 2152 if (!isa<StructType>(Val0->getType()) && !isa<ArrayType>(Val0->getType())) 2153 return Error(ID.Loc, "extractvalue operand must be array or struct"); 2154 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 2155 Indices.end())) 2156 return Error(ID.Loc, "invalid indices for insertvalue"); 2157 ID.ConstantVal = ConstantExpr::getInsertValue(Val0, Val1, 2158 Indices.data(), Indices.size()); 2159 ID.Kind = ValID::t_Constant; 2160 return false; 2161 } 2162 case lltok::kw_icmp: 2163 case lltok::kw_fcmp: { 2164 unsigned PredVal, Opc = Lex.getUIntVal(); 2165 Constant *Val0, *Val1; 2166 Lex.Lex(); 2167 if (ParseCmpPredicate(PredVal, Opc) || 2168 ParseToken(lltok::lparen, "expected '(' in compare constantexpr") || 2169 ParseGlobalTypeAndValue(Val0) || 2170 ParseToken(lltok::comma, "expected comma in compare constantexpr") || 2171 ParseGlobalTypeAndValue(Val1) || 2172 ParseToken(lltok::rparen, "expected ')' in compare constantexpr")) 2173 return true; 2174 2175 if (Val0->getType() != Val1->getType()) 2176 return Error(ID.Loc, "compare operands must have the same type"); 2177 2178 CmpInst::Predicate Pred = (CmpInst::Predicate)PredVal; 2179 2180 if (Opc == Instruction::FCmp) { 2181 if (!Val0->getType()->isFPOrFPVector()) 2182 return Error(ID.Loc, "fcmp requires floating point operands"); 2183 ID.ConstantVal = ConstantExpr::getFCmp(Pred, Val0, Val1); 2184 } else { 2185 assert(Opc == Instruction::ICmp && "Unexpected opcode for CmpInst!"); 2186 if (!Val0->getType()->isIntOrIntVector() && 2187 !isa<PointerType>(Val0->getType())) 2188 return Error(ID.Loc, "icmp requires pointer or integer operands"); 2189 ID.ConstantVal = ConstantExpr::getICmp(Pred, Val0, Val1); 2190 } 2191 ID.Kind = ValID::t_Constant; 2192 return false; 2193 } 2194 2195 // Binary Operators. 2196 case lltok::kw_add: 2197 case lltok::kw_fadd: 2198 case lltok::kw_sub: 2199 case lltok::kw_fsub: 2200 case lltok::kw_mul: 2201 case lltok::kw_fmul: 2202 case lltok::kw_udiv: 2203 case lltok::kw_sdiv: 2204 case lltok::kw_fdiv: 2205 case lltok::kw_urem: 2206 case lltok::kw_srem: 2207 case lltok::kw_frem: { 2208 bool NUW = false; 2209 bool NSW = false; 2210 bool Exact = false; 2211 unsigned Opc = Lex.getUIntVal(); 2212 Constant *Val0, *Val1; 2213 Lex.Lex(); 2214 LocTy ModifierLoc = Lex.getLoc(); 2215 if (Opc == Instruction::Add || 2216 Opc == Instruction::Sub || 2217 Opc == Instruction::Mul) { 2218 if (EatIfPresent(lltok::kw_nuw)) 2219 NUW = true; 2220 if (EatIfPresent(lltok::kw_nsw)) { 2221 NSW = true; 2222 if (EatIfPresent(lltok::kw_nuw)) 2223 NUW = true; 2224 } 2225 } else if (Opc == Instruction::SDiv) { 2226 if (EatIfPresent(lltok::kw_exact)) 2227 Exact = true; 2228 } 2229 if (ParseToken(lltok::lparen, "expected '(' in binary constantexpr") || 2230 ParseGlobalTypeAndValue(Val0) || 2231 ParseToken(lltok::comma, "expected comma in binary constantexpr") || 2232 ParseGlobalTypeAndValue(Val1) || 2233 ParseToken(lltok::rparen, "expected ')' in binary constantexpr")) 2234 return true; 2235 if (Val0->getType() != Val1->getType()) 2236 return Error(ID.Loc, "operands of constexpr must have same type"); 2237 if (!Val0->getType()->isIntOrIntVector()) { 2238 if (NUW) 2239 return Error(ModifierLoc, "nuw only applies to integer operations"); 2240 if (NSW) 2241 return Error(ModifierLoc, "nsw only applies to integer operations"); 2242 } 2243 // API compatibility: Accept either integer or floating-point types with 2244 // add, sub, and mul. 2245 if (!Val0->getType()->isIntOrIntVector() && 2246 !Val0->getType()->isFPOrFPVector()) 2247 return Error(ID.Loc,"constexpr requires integer, fp, or vector operands"); 2248 unsigned Flags = 0; 2249 if (NUW) Flags |= OverflowingBinaryOperator::NoUnsignedWrap; 2250 if (NSW) Flags |= OverflowingBinaryOperator::NoSignedWrap; 2251 if (Exact) Flags |= SDivOperator::IsExact; 2252 Constant *C = ConstantExpr::get(Opc, Val0, Val1, Flags); 2253 ID.ConstantVal = C; 2254 ID.Kind = ValID::t_Constant; 2255 return false; 2256 } 2257 2258 // Logical Operations 2259 case lltok::kw_shl: 2260 case lltok::kw_lshr: 2261 case lltok::kw_ashr: 2262 case lltok::kw_and: 2263 case lltok::kw_or: 2264 case lltok::kw_xor: { 2265 unsigned Opc = Lex.getUIntVal(); 2266 Constant *Val0, *Val1; 2267 Lex.Lex(); 2268 if (ParseToken(lltok::lparen, "expected '(' in logical constantexpr") || 2269 ParseGlobalTypeAndValue(Val0) || 2270 ParseToken(lltok::comma, "expected comma in logical constantexpr") || 2271 ParseGlobalTypeAndValue(Val1) || 2272 ParseToken(lltok::rparen, "expected ')' in logical constantexpr")) 2273 return true; 2274 if (Val0->getType() != Val1->getType()) 2275 return Error(ID.Loc, "operands of constexpr must have same type"); 2276 if (!Val0->getType()->isIntOrIntVector()) 2277 return Error(ID.Loc, 2278 "constexpr requires integer or integer vector operands"); 2279 ID.ConstantVal = ConstantExpr::get(Opc, Val0, Val1); 2280 ID.Kind = ValID::t_Constant; 2281 return false; 2282 } 2283 2284 case lltok::kw_getelementptr: 2285 case lltok::kw_shufflevector: 2286 case lltok::kw_insertelement: 2287 case lltok::kw_extractelement: 2288 case lltok::kw_select: { 2289 unsigned Opc = Lex.getUIntVal(); 2290 SmallVector<Constant*, 16> Elts; 2291 bool InBounds = false; 2292 Lex.Lex(); 2293 if (Opc == Instruction::GetElementPtr) 2294 InBounds = EatIfPresent(lltok::kw_inbounds); 2295 if (ParseToken(lltok::lparen, "expected '(' in constantexpr") || 2296 ParseGlobalValueVector(Elts) || 2297 ParseToken(lltok::rparen, "expected ')' in constantexpr")) 2298 return true; 2299 2300 if (Opc == Instruction::GetElementPtr) { 2301 if (Elts.size() == 0 || !isa<PointerType>(Elts[0]->getType())) 2302 return Error(ID.Loc, "getelementptr requires pointer operand"); 2303 2304 if (!GetElementPtrInst::getIndexedType(Elts[0]->getType(), 2305 (Value**)(Elts.data() + 1), 2306 Elts.size() - 1)) 2307 return Error(ID.Loc, "invalid indices for getelementptr"); 2308 ID.ConstantVal = InBounds ? 2309 ConstantExpr::getInBoundsGetElementPtr(Elts[0], 2310 Elts.data() + 1, 2311 Elts.size() - 1) : 2312 ConstantExpr::getGetElementPtr(Elts[0], 2313 Elts.data() + 1, Elts.size() - 1); 2314 } else if (Opc == Instruction::Select) { 2315 if (Elts.size() != 3) 2316 return Error(ID.Loc, "expected three operands to select"); 2317 if (const char *Reason = SelectInst::areInvalidOperands(Elts[0], Elts[1], 2318 Elts[2])) 2319 return Error(ID.Loc, Reason); 2320 ID.ConstantVal = ConstantExpr::getSelect(Elts[0], Elts[1], Elts[2]); 2321 } else if (Opc == Instruction::ShuffleVector) { 2322 if (Elts.size() != 3) 2323 return Error(ID.Loc, "expected three operands to shufflevector"); 2324 if (!ShuffleVectorInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2325 return Error(ID.Loc, "invalid operands to shufflevector"); 2326 ID.ConstantVal = 2327 ConstantExpr::getShuffleVector(Elts[0], Elts[1],Elts[2]); 2328 } else if (Opc == Instruction::ExtractElement) { 2329 if (Elts.size() != 2) 2330 return Error(ID.Loc, "expected two operands to extractelement"); 2331 if (!ExtractElementInst::isValidOperands(Elts[0], Elts[1])) 2332 return Error(ID.Loc, "invalid extractelement operands"); 2333 ID.ConstantVal = ConstantExpr::getExtractElement(Elts[0], Elts[1]); 2334 } else { 2335 assert(Opc == Instruction::InsertElement && "Unknown opcode"); 2336 if (Elts.size() != 3) 2337 return Error(ID.Loc, "expected three operands to insertelement"); 2338 if (!InsertElementInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2339 return Error(ID.Loc, "invalid insertelement operands"); 2340 ID.ConstantVal = 2341 ConstantExpr::getInsertElement(Elts[0], Elts[1],Elts[2]); 2342 } 2343 2344 ID.Kind = ValID::t_Constant; 2345 return false; 2346 } 2347 } 2348 2349 Lex.Lex(); 2350 return false; 2351} 2352 2353/// ParseGlobalValue - Parse a global value with the specified type. 2354bool LLParser::ParseGlobalValue(const Type *Ty, Constant *&V) { 2355 V = 0; 2356 ValID ID; 2357 return ParseValID(ID) || 2358 ConvertGlobalValIDToValue(Ty, ID, V); 2359} 2360 2361/// ConvertGlobalValIDToValue - Apply a type to a ValID to get a fully resolved 2362/// constant. 2363bool LLParser::ConvertGlobalValIDToValue(const Type *Ty, ValID &ID, 2364 Constant *&V) { 2365 if (isa<FunctionType>(Ty)) 2366 return Error(ID.Loc, "functions are not values, refer to them as pointers"); 2367 2368 switch (ID.Kind) { 2369 default: llvm_unreachable("Unknown ValID!"); 2370 case ValID::t_MDNode: 2371 case ValID::t_MDString: 2372 return Error(ID.Loc, "invalid use of metadata"); 2373 case ValID::t_LocalID: 2374 case ValID::t_LocalName: 2375 return Error(ID.Loc, "invalid use of function-local name"); 2376 case ValID::t_InlineAsm: 2377 return Error(ID.Loc, "inline asm can only be an operand of call/invoke"); 2378 case ValID::t_GlobalName: 2379 V = GetGlobalVal(ID.StrVal, Ty, ID.Loc); 2380 return V == 0; 2381 case ValID::t_GlobalID: 2382 V = GetGlobalVal(ID.UIntVal, Ty, ID.Loc); 2383 return V == 0; 2384 case ValID::t_APSInt: 2385 if (!isa<IntegerType>(Ty)) 2386 return Error(ID.Loc, "integer constant must have integer type"); 2387 ID.APSIntVal.extOrTrunc(Ty->getPrimitiveSizeInBits()); 2388 V = ConstantInt::get(Context, ID.APSIntVal); 2389 return false; 2390 case ValID::t_APFloat: 2391 if (!Ty->isFloatingPoint() || 2392 !ConstantFP::isValueValidForType(Ty, ID.APFloatVal)) 2393 return Error(ID.Loc, "floating point constant invalid for type"); 2394 2395 // The lexer has no type info, so builds all float and double FP constants 2396 // as double. Fix this here. Long double does not need this. 2397 if (&ID.APFloatVal.getSemantics() == &APFloat::IEEEdouble && 2398 Ty->isFloatTy()) { 2399 bool Ignored; 2400 ID.APFloatVal.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, 2401 &Ignored); 2402 } 2403 V = ConstantFP::get(Context, ID.APFloatVal); 2404 2405 if (V->getType() != Ty) 2406 return Error(ID.Loc, "floating point constant does not have type '" + 2407 Ty->getDescription() + "'"); 2408 2409 return false; 2410 case ValID::t_Null: 2411 if (!isa<PointerType>(Ty)) 2412 return Error(ID.Loc, "null must be a pointer type"); 2413 V = ConstantPointerNull::get(cast<PointerType>(Ty)); 2414 return false; 2415 case ValID::t_Undef: 2416 // FIXME: LabelTy should not be a first-class type. 2417 if ((!Ty->isFirstClassType() || Ty->isLabelTy()) && 2418 !isa<OpaqueType>(Ty)) 2419 return Error(ID.Loc, "invalid type for undef constant"); 2420 V = UndefValue::get(Ty); 2421 return false; 2422 case ValID::t_EmptyArray: 2423 if (!isa<ArrayType>(Ty) || cast<ArrayType>(Ty)->getNumElements() != 0) 2424 return Error(ID.Loc, "invalid empty array initializer"); 2425 V = UndefValue::get(Ty); 2426 return false; 2427 case ValID::t_Zero: 2428 // FIXME: LabelTy should not be a first-class type. 2429 if (!Ty->isFirstClassType() || Ty->isLabelTy()) 2430 return Error(ID.Loc, "invalid type for null constant"); 2431 V = Constant::getNullValue(Ty); 2432 return false; 2433 case ValID::t_Constant: 2434 if (ID.ConstantVal->getType() != Ty) 2435 return Error(ID.Loc, "constant expression type mismatch"); 2436 V = ID.ConstantVal; 2437 return false; 2438 } 2439} 2440 2441/// ConvertGlobalOrMetadataValIDToValue - Apply a type to a ValID to get a fully 2442/// resolved constant or metadata value. 2443bool LLParser::ConvertGlobalOrMetadataValIDToValue(const Type *Ty, ValID &ID, 2444 Value *&V) { 2445 switch (ID.Kind) { 2446 case ValID::t_MDNode: 2447 if (!Ty->isMetadataTy()) 2448 return Error(ID.Loc, "metadata value must have metadata type"); 2449 V = ID.MDNodeVal; 2450 return false; 2451 case ValID::t_MDString: 2452 if (!Ty->isMetadataTy()) 2453 return Error(ID.Loc, "metadata value must have metadata type"); 2454 V = ID.MDStringVal; 2455 return false; 2456 default: 2457 Constant *C; 2458 if (ConvertGlobalValIDToValue(Ty, ID, C)) return true; 2459 V = C; 2460 return false; 2461 } 2462} 2463 2464 2465bool LLParser::ParseGlobalTypeAndValue(Constant *&V) { 2466 PATypeHolder Type(Type::getVoidTy(Context)); 2467 return ParseType(Type) || 2468 ParseGlobalValue(Type, V); 2469} 2470 2471/// ParseGlobalValueVector 2472/// ::= /*empty*/ 2473/// ::= TypeAndValue (',' TypeAndValue)* 2474bool LLParser::ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts) { 2475 // Empty list. 2476 if (Lex.getKind() == lltok::rbrace || 2477 Lex.getKind() == lltok::rsquare || 2478 Lex.getKind() == lltok::greater || 2479 Lex.getKind() == lltok::rparen) 2480 return false; 2481 2482 Constant *C; 2483 if (ParseGlobalTypeAndValue(C)) return true; 2484 Elts.push_back(C); 2485 2486 while (EatIfPresent(lltok::comma)) { 2487 if (ParseGlobalTypeAndValue(C)) return true; 2488 Elts.push_back(C); 2489 } 2490 2491 return false; 2492} 2493 2494 2495//===----------------------------------------------------------------------===// 2496// Function Parsing. 2497//===----------------------------------------------------------------------===// 2498 2499bool LLParser::ConvertValIDToValue(const Type *Ty, ValID &ID, Value *&V, 2500 PerFunctionState &PFS) { 2501 switch (ID.Kind) { 2502 case ValID::t_LocalID: V = PFS.GetVal(ID.UIntVal, Ty, ID.Loc); break; 2503 case ValID::t_LocalName: V = PFS.GetVal(ID.StrVal, Ty, ID.Loc); break; 2504 case ValID::t_InlineAsm: { 2505 const PointerType *PTy = dyn_cast<PointerType>(Ty); 2506 const FunctionType *FTy = 2507 PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : 0; 2508 if (!FTy || !InlineAsm::Verify(FTy, ID.StrVal2)) 2509 return Error(ID.Loc, "invalid type for inline asm constraint string"); 2510 V = InlineAsm::get(FTy, ID.StrVal, ID.StrVal2, ID.UIntVal&1, ID.UIntVal>>1); 2511 return false; 2512 } 2513 default: 2514 return ConvertGlobalOrMetadataValIDToValue(Ty, ID, V); 2515 } 2516 2517 return V == 0; 2518} 2519 2520bool LLParser::ParseValue(const Type *Ty, Value *&V, PerFunctionState &PFS) { 2521 V = 0; 2522 ValID ID; 2523 return ParseValID(ID) || 2524 ConvertValIDToValue(Ty, ID, V, PFS); 2525} 2526 2527bool LLParser::ParseTypeAndValue(Value *&V, PerFunctionState &PFS) { 2528 PATypeHolder T(Type::getVoidTy(Context)); 2529 return ParseType(T) || 2530 ParseValue(T, V, PFS); 2531} 2532 2533bool LLParser::ParseTypeAndBasicBlock(BasicBlock *&BB, LocTy &Loc, 2534 PerFunctionState &PFS) { 2535 Value *V; 2536 Loc = Lex.getLoc(); 2537 if (ParseTypeAndValue(V, PFS)) return true; 2538 if (!isa<BasicBlock>(V)) 2539 return Error(Loc, "expected a basic block"); 2540 BB = cast<BasicBlock>(V); 2541 return false; 2542} 2543 2544 2545/// FunctionHeader 2546/// ::= OptionalLinkage OptionalVisibility OptionalCallingConv OptRetAttrs 2547/// Type GlobalName '(' ArgList ')' OptFuncAttrs OptSection 2548/// OptionalAlign OptGC 2549bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) { 2550 // Parse the linkage. 2551 LocTy LinkageLoc = Lex.getLoc(); 2552 unsigned Linkage; 2553 2554 unsigned Visibility, RetAttrs; 2555 CallingConv::ID CC; 2556 PATypeHolder RetType(Type::getVoidTy(Context)); 2557 LocTy RetTypeLoc = Lex.getLoc(); 2558 if (ParseOptionalLinkage(Linkage) || 2559 ParseOptionalVisibility(Visibility) || 2560 ParseOptionalCallingConv(CC) || 2561 ParseOptionalAttrs(RetAttrs, 1) || 2562 ParseType(RetType, RetTypeLoc, true /*void allowed*/)) 2563 return true; 2564 2565 // Verify that the linkage is ok. 2566 switch ((GlobalValue::LinkageTypes)Linkage) { 2567 case GlobalValue::ExternalLinkage: 2568 break; // always ok. 2569 case GlobalValue::DLLImportLinkage: 2570 case GlobalValue::ExternalWeakLinkage: 2571 if (isDefine) 2572 return Error(LinkageLoc, "invalid linkage for function definition"); 2573 break; 2574 case GlobalValue::PrivateLinkage: 2575 case GlobalValue::LinkerPrivateLinkage: 2576 case GlobalValue::InternalLinkage: 2577 case GlobalValue::AvailableExternallyLinkage: 2578 case GlobalValue::LinkOnceAnyLinkage: 2579 case GlobalValue::LinkOnceODRLinkage: 2580 case GlobalValue::WeakAnyLinkage: 2581 case GlobalValue::WeakODRLinkage: 2582 case GlobalValue::DLLExportLinkage: 2583 if (!isDefine) 2584 return Error(LinkageLoc, "invalid linkage for function declaration"); 2585 break; 2586 case GlobalValue::AppendingLinkage: 2587 case GlobalValue::GhostLinkage: 2588 case GlobalValue::CommonLinkage: 2589 return Error(LinkageLoc, "invalid function linkage type"); 2590 } 2591 2592 if (!FunctionType::isValidReturnType(RetType) || 2593 isa<OpaqueType>(RetType)) 2594 return Error(RetTypeLoc, "invalid function return type"); 2595 2596 LocTy NameLoc = Lex.getLoc(); 2597 2598 std::string FunctionName; 2599 if (Lex.getKind() == lltok::GlobalVar) { 2600 FunctionName = Lex.getStrVal(); 2601 } else if (Lex.getKind() == lltok::GlobalID) { // @42 is ok. 2602 unsigned NameID = Lex.getUIntVal(); 2603 2604 if (NameID != NumberedVals.size()) 2605 return TokError("function expected to be numbered '%" + 2606 utostr(NumberedVals.size()) + "'"); 2607 } else { 2608 return TokError("expected function name"); 2609 } 2610 2611 Lex.Lex(); 2612 2613 if (Lex.getKind() != lltok::lparen) 2614 return TokError("expected '(' in function argument list"); 2615 2616 std::vector<ArgInfo> ArgList; 2617 bool isVarArg; 2618 unsigned FuncAttrs; 2619 std::string Section; 2620 unsigned Alignment; 2621 std::string GC; 2622 2623 if (ParseArgumentList(ArgList, isVarArg, false) || 2624 ParseOptionalAttrs(FuncAttrs, 2) || 2625 (EatIfPresent(lltok::kw_section) && 2626 ParseStringConstant(Section)) || 2627 ParseOptionalAlignment(Alignment) || 2628 (EatIfPresent(lltok::kw_gc) && 2629 ParseStringConstant(GC))) 2630 return true; 2631 2632 // If the alignment was parsed as an attribute, move to the alignment field. 2633 if (FuncAttrs & Attribute::Alignment) { 2634 Alignment = Attribute::getAlignmentFromAttrs(FuncAttrs); 2635 FuncAttrs &= ~Attribute::Alignment; 2636 } 2637 2638 // Okay, if we got here, the function is syntactically valid. Convert types 2639 // and do semantic checks. 2640 std::vector<const Type*> ParamTypeList; 2641 SmallVector<AttributeWithIndex, 8> Attrs; 2642 // FIXME : In 3.0, stop accepting zext, sext and inreg as optional function 2643 // attributes. 2644 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 2645 if (FuncAttrs & ObsoleteFuncAttrs) { 2646 RetAttrs |= FuncAttrs & ObsoleteFuncAttrs; 2647 FuncAttrs &= ~ObsoleteFuncAttrs; 2648 } 2649 2650 if (RetAttrs != Attribute::None) 2651 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 2652 2653 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 2654 ParamTypeList.push_back(ArgList[i].Type); 2655 if (ArgList[i].Attrs != Attribute::None) 2656 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 2657 } 2658 2659 if (FuncAttrs != Attribute::None) 2660 Attrs.push_back(AttributeWithIndex::get(~0, FuncAttrs)); 2661 2662 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 2663 2664 if (PAL.paramHasAttr(1, Attribute::StructRet) && 2665 RetType != Type::getVoidTy(Context)) 2666 return Error(RetTypeLoc, "functions with 'sret' argument must return void"); 2667 2668 const FunctionType *FT = 2669 FunctionType::get(RetType, ParamTypeList, isVarArg); 2670 const PointerType *PFT = PointerType::getUnqual(FT); 2671 2672 Fn = 0; 2673 if (!FunctionName.empty()) { 2674 // If this was a definition of a forward reference, remove the definition 2675 // from the forward reference table and fill in the forward ref. 2676 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator FRVI = 2677 ForwardRefVals.find(FunctionName); 2678 if (FRVI != ForwardRefVals.end()) { 2679 Fn = M->getFunction(FunctionName); 2680 ForwardRefVals.erase(FRVI); 2681 } else if ((Fn = M->getFunction(FunctionName))) { 2682 // If this function already exists in the symbol table, then it is 2683 // multiply defined. We accept a few cases for old backwards compat. 2684 // FIXME: Remove this stuff for LLVM 3.0. 2685 if (Fn->getType() != PFT || Fn->getAttributes() != PAL || 2686 (!Fn->isDeclaration() && isDefine)) { 2687 // If the redefinition has different type or different attributes, 2688 // reject it. If both have bodies, reject it. 2689 return Error(NameLoc, "invalid redefinition of function '" + 2690 FunctionName + "'"); 2691 } else if (Fn->isDeclaration()) { 2692 // Make sure to strip off any argument names so we can't get conflicts. 2693 for (Function::arg_iterator AI = Fn->arg_begin(), AE = Fn->arg_end(); 2694 AI != AE; ++AI) 2695 AI->setName(""); 2696 } 2697 } else if (M->getNamedValue(FunctionName)) { 2698 return Error(NameLoc, "redefinition of function '@" + FunctionName + "'"); 2699 } 2700 2701 } else { 2702 // If this is a definition of a forward referenced function, make sure the 2703 // types agree. 2704 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator I 2705 = ForwardRefValIDs.find(NumberedVals.size()); 2706 if (I != ForwardRefValIDs.end()) { 2707 Fn = cast<Function>(I->second.first); 2708 if (Fn->getType() != PFT) 2709 return Error(NameLoc, "type of definition and forward reference of '@" + 2710 utostr(NumberedVals.size()) +"' disagree"); 2711 ForwardRefValIDs.erase(I); 2712 } 2713 } 2714 2715 if (Fn == 0) 2716 Fn = Function::Create(FT, GlobalValue::ExternalLinkage, FunctionName, M); 2717 else // Move the forward-reference to the correct spot in the module. 2718 M->getFunctionList().splice(M->end(), M->getFunctionList(), Fn); 2719 2720 if (FunctionName.empty()) 2721 NumberedVals.push_back(Fn); 2722 2723 Fn->setLinkage((GlobalValue::LinkageTypes)Linkage); 2724 Fn->setVisibility((GlobalValue::VisibilityTypes)Visibility); 2725 Fn->setCallingConv(CC); 2726 Fn->setAttributes(PAL); 2727 Fn->setAlignment(Alignment); 2728 Fn->setSection(Section); 2729 if (!GC.empty()) Fn->setGC(GC.c_str()); 2730 2731 // Add all of the arguments we parsed to the function. 2732 Function::arg_iterator ArgIt = Fn->arg_begin(); 2733 for (unsigned i = 0, e = ArgList.size(); i != e; ++i, ++ArgIt) { 2734 // If we run out of arguments in the Function prototype, exit early. 2735 // FIXME: REMOVE THIS IN LLVM 3.0, this is just for the mismatch case above. 2736 if (ArgIt == Fn->arg_end()) break; 2737 2738 // If the argument has a name, insert it into the argument symbol table. 2739 if (ArgList[i].Name.empty()) continue; 2740 2741 // Set the name, if it conflicted, it will be auto-renamed. 2742 ArgIt->setName(ArgList[i].Name); 2743 2744 if (ArgIt->getNameStr() != ArgList[i].Name) 2745 return Error(ArgList[i].Loc, "redefinition of argument '%" + 2746 ArgList[i].Name + "'"); 2747 } 2748 2749 return false; 2750} 2751 2752 2753/// ParseFunctionBody 2754/// ::= '{' BasicBlock+ '}' 2755/// ::= 'begin' BasicBlock+ 'end' // FIXME: remove in LLVM 3.0 2756/// 2757bool LLParser::ParseFunctionBody(Function &Fn) { 2758 if (Lex.getKind() != lltok::lbrace && Lex.getKind() != lltok::kw_begin) 2759 return TokError("expected '{' in function body"); 2760 Lex.Lex(); // eat the {. 2761 2762 int FunctionNumber = -1; 2763 if (!Fn.hasName()) FunctionNumber = NumberedVals.size()-1; 2764 2765 PerFunctionState PFS(*this, Fn, FunctionNumber); 2766 2767 while (Lex.getKind() != lltok::rbrace && Lex.getKind() != lltok::kw_end) 2768 if (ParseBasicBlock(PFS)) return true; 2769 2770 // Eat the }. 2771 Lex.Lex(); 2772 2773 // Verify function is ok. 2774 return PFS.FinishFunction(); 2775} 2776 2777/// ParseBasicBlock 2778/// ::= LabelStr? Instruction* 2779bool LLParser::ParseBasicBlock(PerFunctionState &PFS) { 2780 // If this basic block starts out with a name, remember it. 2781 std::string Name; 2782 LocTy NameLoc = Lex.getLoc(); 2783 if (Lex.getKind() == lltok::LabelStr) { 2784 Name = Lex.getStrVal(); 2785 Lex.Lex(); 2786 } 2787 2788 BasicBlock *BB = PFS.DefineBB(Name, NameLoc); 2789 if (BB == 0) return true; 2790 2791 std::string NameStr; 2792 2793 // Parse the instructions in this block until we get a terminator. 2794 Instruction *Inst; 2795 do { 2796 // This instruction may have three possibilities for a name: a) none 2797 // specified, b) name specified "%foo =", c) number specified: "%4 =". 2798 LocTy NameLoc = Lex.getLoc(); 2799 int NameID = -1; 2800 NameStr = ""; 2801 2802 if (Lex.getKind() == lltok::LocalVarID) { 2803 NameID = Lex.getUIntVal(); 2804 Lex.Lex(); 2805 if (ParseToken(lltok::equal, "expected '=' after instruction id")) 2806 return true; 2807 } else if (Lex.getKind() == lltok::LocalVar || 2808 // FIXME: REMOVE IN LLVM 3.0 2809 Lex.getKind() == lltok::StringConstant) { 2810 NameStr = Lex.getStrVal(); 2811 Lex.Lex(); 2812 if (ParseToken(lltok::equal, "expected '=' after instruction name")) 2813 return true; 2814 } 2815 2816 switch (ParseInstruction(Inst, BB, PFS)) { 2817 default: assert(0 && "Unknown ParseInstruction result!"); 2818 case InstError: return true; 2819 case InstNormal: 2820 // With a normal result, we check to see if the instruction is followed by 2821 // a comma and metadata. 2822 if (EatIfPresent(lltok::comma)) 2823 if (ParseOptionalCustomMetadata()) 2824 return true; 2825 break; 2826 case InstExtraComma: 2827 // If the instruction parser ate an extra comma at the end of it, it 2828 // *must* be followed by metadata. 2829 if (Lex.getKind() != lltok::MetadataVar) 2830 return TokError("expected metadata after comma"); 2831 // Parse it. 2832 if (ParseOptionalCustomMetadata()) 2833 return true; 2834 break; 2835 } 2836 2837 // Set metadata attached with this instruction. 2838 for (SmallVector<std::pair<unsigned, MDNode *>, 2>::iterator 2839 MDI = MDsOnInst.begin(), MDE = MDsOnInst.end(); MDI != MDE; ++MDI) 2840 Inst->setMetadata(MDI->first, MDI->second); 2841 MDsOnInst.clear(); 2842 2843 BB->getInstList().push_back(Inst); 2844 2845 // Set the name on the instruction. 2846 if (PFS.SetInstName(NameID, NameStr, NameLoc, Inst)) return true; 2847 } while (!isa<TerminatorInst>(Inst)); 2848 2849 return false; 2850} 2851 2852//===----------------------------------------------------------------------===// 2853// Instruction Parsing. 2854//===----------------------------------------------------------------------===// 2855 2856/// ParseInstruction - Parse one of the many different instructions. 2857/// 2858int LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB, 2859 PerFunctionState &PFS) { 2860 lltok::Kind Token = Lex.getKind(); 2861 if (Token == lltok::Eof) 2862 return TokError("found end of file when expecting more instructions"); 2863 LocTy Loc = Lex.getLoc(); 2864 unsigned KeywordVal = Lex.getUIntVal(); 2865 Lex.Lex(); // Eat the keyword. 2866 2867 switch (Token) { 2868 default: return Error(Loc, "expected instruction opcode"); 2869 // Terminator Instructions. 2870 case lltok::kw_unwind: Inst = new UnwindInst(Context); return false; 2871 case lltok::kw_unreachable: Inst = new UnreachableInst(Context); return false; 2872 case lltok::kw_ret: return ParseRet(Inst, BB, PFS); 2873 case lltok::kw_br: return ParseBr(Inst, PFS); 2874 case lltok::kw_switch: return ParseSwitch(Inst, PFS); 2875 case lltok::kw_indirectbr: return ParseIndirectBr(Inst, PFS); 2876 case lltok::kw_invoke: return ParseInvoke(Inst, PFS); 2877 // Binary Operators. 2878 case lltok::kw_add: 2879 case lltok::kw_sub: 2880 case lltok::kw_mul: { 2881 bool NUW = false; 2882 bool NSW = false; 2883 LocTy ModifierLoc = Lex.getLoc(); 2884 if (EatIfPresent(lltok::kw_nuw)) 2885 NUW = true; 2886 if (EatIfPresent(lltok::kw_nsw)) { 2887 NSW = true; 2888 if (EatIfPresent(lltok::kw_nuw)) 2889 NUW = true; 2890 } 2891 // API compatibility: Accept either integer or floating-point types. 2892 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 0); 2893 if (!Result) { 2894 if (!Inst->getType()->isIntOrIntVector()) { 2895 if (NUW) 2896 return Error(ModifierLoc, "nuw only applies to integer operations"); 2897 if (NSW) 2898 return Error(ModifierLoc, "nsw only applies to integer operations"); 2899 } 2900 if (NUW) 2901 cast<BinaryOperator>(Inst)->setHasNoUnsignedWrap(true); 2902 if (NSW) 2903 cast<BinaryOperator>(Inst)->setHasNoSignedWrap(true); 2904 } 2905 return Result; 2906 } 2907 case lltok::kw_fadd: 2908 case lltok::kw_fsub: 2909 case lltok::kw_fmul: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2910 2911 case lltok::kw_sdiv: { 2912 bool Exact = false; 2913 if (EatIfPresent(lltok::kw_exact)) 2914 Exact = true; 2915 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 1); 2916 if (!Result) 2917 if (Exact) 2918 cast<BinaryOperator>(Inst)->setIsExact(true); 2919 return Result; 2920 } 2921 2922 case lltok::kw_udiv: 2923 case lltok::kw_urem: 2924 case lltok::kw_srem: return ParseArithmetic(Inst, PFS, KeywordVal, 1); 2925 case lltok::kw_fdiv: 2926 case lltok::kw_frem: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2927 case lltok::kw_shl: 2928 case lltok::kw_lshr: 2929 case lltok::kw_ashr: 2930 case lltok::kw_and: 2931 case lltok::kw_or: 2932 case lltok::kw_xor: return ParseLogical(Inst, PFS, KeywordVal); 2933 case lltok::kw_icmp: 2934 case lltok::kw_fcmp: return ParseCompare(Inst, PFS, KeywordVal); 2935 // Casts. 2936 case lltok::kw_trunc: 2937 case lltok::kw_zext: 2938 case lltok::kw_sext: 2939 case lltok::kw_fptrunc: 2940 case lltok::kw_fpext: 2941 case lltok::kw_bitcast: 2942 case lltok::kw_uitofp: 2943 case lltok::kw_sitofp: 2944 case lltok::kw_fptoui: 2945 case lltok::kw_fptosi: 2946 case lltok::kw_inttoptr: 2947 case lltok::kw_ptrtoint: return ParseCast(Inst, PFS, KeywordVal); 2948 // Other. 2949 case lltok::kw_select: return ParseSelect(Inst, PFS); 2950 case lltok::kw_va_arg: return ParseVA_Arg(Inst, PFS); 2951 case lltok::kw_extractelement: return ParseExtractElement(Inst, PFS); 2952 case lltok::kw_insertelement: return ParseInsertElement(Inst, PFS); 2953 case lltok::kw_shufflevector: return ParseShuffleVector(Inst, PFS); 2954 case lltok::kw_phi: return ParsePHI(Inst, PFS); 2955 case lltok::kw_call: return ParseCall(Inst, PFS, false); 2956 case lltok::kw_tail: return ParseCall(Inst, PFS, true); 2957 // Memory. 2958 case lltok::kw_alloca: return ParseAlloc(Inst, PFS); 2959 case lltok::kw_malloc: return ParseAlloc(Inst, PFS, BB, false); 2960 case lltok::kw_free: return ParseFree(Inst, PFS, BB); 2961 case lltok::kw_load: return ParseLoad(Inst, PFS, false); 2962 case lltok::kw_store: return ParseStore(Inst, PFS, false); 2963 case lltok::kw_volatile: 2964 if (EatIfPresent(lltok::kw_load)) 2965 return ParseLoad(Inst, PFS, true); 2966 else if (EatIfPresent(lltok::kw_store)) 2967 return ParseStore(Inst, PFS, true); 2968 else 2969 return TokError("expected 'load' or 'store'"); 2970 case lltok::kw_getresult: return ParseGetResult(Inst, PFS); 2971 case lltok::kw_getelementptr: return ParseGetElementPtr(Inst, PFS); 2972 case lltok::kw_extractvalue: return ParseExtractValue(Inst, PFS); 2973 case lltok::kw_insertvalue: return ParseInsertValue(Inst, PFS); 2974 } 2975} 2976 2977/// ParseCmpPredicate - Parse an integer or fp predicate, based on Kind. 2978bool LLParser::ParseCmpPredicate(unsigned &P, unsigned Opc) { 2979 if (Opc == Instruction::FCmp) { 2980 switch (Lex.getKind()) { 2981 default: TokError("expected fcmp predicate (e.g. 'oeq')"); 2982 case lltok::kw_oeq: P = CmpInst::FCMP_OEQ; break; 2983 case lltok::kw_one: P = CmpInst::FCMP_ONE; break; 2984 case lltok::kw_olt: P = CmpInst::FCMP_OLT; break; 2985 case lltok::kw_ogt: P = CmpInst::FCMP_OGT; break; 2986 case lltok::kw_ole: P = CmpInst::FCMP_OLE; break; 2987 case lltok::kw_oge: P = CmpInst::FCMP_OGE; break; 2988 case lltok::kw_ord: P = CmpInst::FCMP_ORD; break; 2989 case lltok::kw_uno: P = CmpInst::FCMP_UNO; break; 2990 case lltok::kw_ueq: P = CmpInst::FCMP_UEQ; break; 2991 case lltok::kw_une: P = CmpInst::FCMP_UNE; break; 2992 case lltok::kw_ult: P = CmpInst::FCMP_ULT; break; 2993 case lltok::kw_ugt: P = CmpInst::FCMP_UGT; break; 2994 case lltok::kw_ule: P = CmpInst::FCMP_ULE; break; 2995 case lltok::kw_uge: P = CmpInst::FCMP_UGE; break; 2996 case lltok::kw_true: P = CmpInst::FCMP_TRUE; break; 2997 case lltok::kw_false: P = CmpInst::FCMP_FALSE; break; 2998 } 2999 } else { 3000 switch (Lex.getKind()) { 3001 default: TokError("expected icmp predicate (e.g. 'eq')"); 3002 case lltok::kw_eq: P = CmpInst::ICMP_EQ; break; 3003 case lltok::kw_ne: P = CmpInst::ICMP_NE; break; 3004 case lltok::kw_slt: P = CmpInst::ICMP_SLT; break; 3005 case lltok::kw_sgt: P = CmpInst::ICMP_SGT; break; 3006 case lltok::kw_sle: P = CmpInst::ICMP_SLE; break; 3007 case lltok::kw_sge: P = CmpInst::ICMP_SGE; break; 3008 case lltok::kw_ult: P = CmpInst::ICMP_ULT; break; 3009 case lltok::kw_ugt: P = CmpInst::ICMP_UGT; break; 3010 case lltok::kw_ule: P = CmpInst::ICMP_ULE; break; 3011 case lltok::kw_uge: P = CmpInst::ICMP_UGE; break; 3012 } 3013 } 3014 Lex.Lex(); 3015 return false; 3016} 3017 3018//===----------------------------------------------------------------------===// 3019// Terminator Instructions. 3020//===----------------------------------------------------------------------===// 3021 3022/// ParseRet - Parse a return instruction. 3023/// ::= 'ret' void (',' !dbg, !1)* 3024/// ::= 'ret' TypeAndValue (',' !dbg, !1)* 3025/// ::= 'ret' TypeAndValue (',' TypeAndValue)+ (',' !dbg, !1)* 3026/// [[obsolete: LLVM 3.0]] 3027int LLParser::ParseRet(Instruction *&Inst, BasicBlock *BB, 3028 PerFunctionState &PFS) { 3029 PATypeHolder Ty(Type::getVoidTy(Context)); 3030 if (ParseType(Ty, true /*void allowed*/)) return true; 3031 3032 if (Ty->isVoidTy()) { 3033 Inst = ReturnInst::Create(Context); 3034 return false; 3035 } 3036 3037 Value *RV; 3038 if (ParseValue(Ty, RV, PFS)) return true; 3039 3040 bool ExtraComma = false; 3041 if (EatIfPresent(lltok::comma)) { 3042 // Parse optional custom metadata, e.g. !dbg 3043 if (Lex.getKind() == lltok::MetadataVar) { 3044 ExtraComma = true; 3045 } else { 3046 // The normal case is one return value. 3047 // FIXME: LLVM 3.0 remove MRV support for 'ret i32 1, i32 2', requiring 3048 // use of 'ret {i32,i32} {i32 1, i32 2}' 3049 SmallVector<Value*, 8> RVs; 3050 RVs.push_back(RV); 3051 3052 do { 3053 // If optional custom metadata, e.g. !dbg is seen then this is the 3054 // end of MRV. 3055 if (Lex.getKind() == lltok::MetadataVar) 3056 break; 3057 if (ParseTypeAndValue(RV, PFS)) return true; 3058 RVs.push_back(RV); 3059 } while (EatIfPresent(lltok::comma)); 3060 3061 RV = UndefValue::get(PFS.getFunction().getReturnType()); 3062 for (unsigned i = 0, e = RVs.size(); i != e; ++i) { 3063 Instruction *I = InsertValueInst::Create(RV, RVs[i], i, "mrv"); 3064 BB->getInstList().push_back(I); 3065 RV = I; 3066 } 3067 } 3068 } 3069 3070 Inst = ReturnInst::Create(Context, RV); 3071 return ExtraComma ? InstExtraComma : InstNormal; 3072} 3073 3074 3075/// ParseBr 3076/// ::= 'br' TypeAndValue 3077/// ::= 'br' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3078bool LLParser::ParseBr(Instruction *&Inst, PerFunctionState &PFS) { 3079 LocTy Loc, Loc2; 3080 Value *Op0; 3081 BasicBlock *Op1, *Op2; 3082 if (ParseTypeAndValue(Op0, Loc, PFS)) return true; 3083 3084 if (BasicBlock *BB = dyn_cast<BasicBlock>(Op0)) { 3085 Inst = BranchInst::Create(BB); 3086 return false; 3087 } 3088 3089 if (Op0->getType() != Type::getInt1Ty(Context)) 3090 return Error(Loc, "branch condition must have 'i1' type"); 3091 3092 if (ParseToken(lltok::comma, "expected ',' after branch condition") || 3093 ParseTypeAndBasicBlock(Op1, Loc, PFS) || 3094 ParseToken(lltok::comma, "expected ',' after true destination") || 3095 ParseTypeAndBasicBlock(Op2, Loc2, PFS)) 3096 return true; 3097 3098 Inst = BranchInst::Create(Op1, Op2, Op0); 3099 return false; 3100} 3101 3102/// ParseSwitch 3103/// Instruction 3104/// ::= 'switch' TypeAndValue ',' TypeAndValue '[' JumpTable ']' 3105/// JumpTable 3106/// ::= (TypeAndValue ',' TypeAndValue)* 3107bool LLParser::ParseSwitch(Instruction *&Inst, PerFunctionState &PFS) { 3108 LocTy CondLoc, BBLoc; 3109 Value *Cond; 3110 BasicBlock *DefaultBB; 3111 if (ParseTypeAndValue(Cond, CondLoc, PFS) || 3112 ParseToken(lltok::comma, "expected ',' after switch condition") || 3113 ParseTypeAndBasicBlock(DefaultBB, BBLoc, PFS) || 3114 ParseToken(lltok::lsquare, "expected '[' with switch table")) 3115 return true; 3116 3117 if (!isa<IntegerType>(Cond->getType())) 3118 return Error(CondLoc, "switch condition must have integer type"); 3119 3120 // Parse the jump table pairs. 3121 SmallPtrSet<Value*, 32> SeenCases; 3122 SmallVector<std::pair<ConstantInt*, BasicBlock*>, 32> Table; 3123 while (Lex.getKind() != lltok::rsquare) { 3124 Value *Constant; 3125 BasicBlock *DestBB; 3126 3127 if (ParseTypeAndValue(Constant, CondLoc, PFS) || 3128 ParseToken(lltok::comma, "expected ',' after case value") || 3129 ParseTypeAndBasicBlock(DestBB, PFS)) 3130 return true; 3131 3132 if (!SeenCases.insert(Constant)) 3133 return Error(CondLoc, "duplicate case value in switch"); 3134 if (!isa<ConstantInt>(Constant)) 3135 return Error(CondLoc, "case value is not a constant integer"); 3136 3137 Table.push_back(std::make_pair(cast<ConstantInt>(Constant), DestBB)); 3138 } 3139 3140 Lex.Lex(); // Eat the ']'. 3141 3142 SwitchInst *SI = SwitchInst::Create(Cond, DefaultBB, Table.size()); 3143 for (unsigned i = 0, e = Table.size(); i != e; ++i) 3144 SI->addCase(Table[i].first, Table[i].second); 3145 Inst = SI; 3146 return false; 3147} 3148 3149/// ParseIndirectBr 3150/// Instruction 3151/// ::= 'indirectbr' TypeAndValue ',' '[' LabelList ']' 3152bool LLParser::ParseIndirectBr(Instruction *&Inst, PerFunctionState &PFS) { 3153 LocTy AddrLoc; 3154 Value *Address; 3155 if (ParseTypeAndValue(Address, AddrLoc, PFS) || 3156 ParseToken(lltok::comma, "expected ',' after indirectbr address") || 3157 ParseToken(lltok::lsquare, "expected '[' with indirectbr")) 3158 return true; 3159 3160 if (!isa<PointerType>(Address->getType())) 3161 return Error(AddrLoc, "indirectbr address must have pointer type"); 3162 3163 // Parse the destination list. 3164 SmallVector<BasicBlock*, 16> DestList; 3165 3166 if (Lex.getKind() != lltok::rsquare) { 3167 BasicBlock *DestBB; 3168 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3169 return true; 3170 DestList.push_back(DestBB); 3171 3172 while (EatIfPresent(lltok::comma)) { 3173 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3174 return true; 3175 DestList.push_back(DestBB); 3176 } 3177 } 3178 3179 if (ParseToken(lltok::rsquare, "expected ']' at end of block list")) 3180 return true; 3181 3182 IndirectBrInst *IBI = IndirectBrInst::Create(Address, DestList.size()); 3183 for (unsigned i = 0, e = DestList.size(); i != e; ++i) 3184 IBI->addDestination(DestList[i]); 3185 Inst = IBI; 3186 return false; 3187} 3188 3189 3190/// ParseInvoke 3191/// ::= 'invoke' OptionalCallingConv OptionalAttrs Type Value ParamList 3192/// OptionalAttrs 'to' TypeAndValue 'unwind' TypeAndValue 3193bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) { 3194 LocTy CallLoc = Lex.getLoc(); 3195 unsigned RetAttrs, FnAttrs; 3196 CallingConv::ID CC; 3197 PATypeHolder RetType(Type::getVoidTy(Context)); 3198 LocTy RetTypeLoc; 3199 ValID CalleeID; 3200 SmallVector<ParamInfo, 16> ArgList; 3201 3202 BasicBlock *NormalBB, *UnwindBB; 3203 if (ParseOptionalCallingConv(CC) || 3204 ParseOptionalAttrs(RetAttrs, 1) || 3205 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3206 ParseValID(CalleeID) || 3207 ParseParameterList(ArgList, PFS) || 3208 ParseOptionalAttrs(FnAttrs, 2) || 3209 ParseToken(lltok::kw_to, "expected 'to' in invoke") || 3210 ParseTypeAndBasicBlock(NormalBB, PFS) || 3211 ParseToken(lltok::kw_unwind, "expected 'unwind' in invoke") || 3212 ParseTypeAndBasicBlock(UnwindBB, PFS)) 3213 return true; 3214 3215 // If RetType is a non-function pointer type, then this is the short syntax 3216 // for the call, which means that RetType is just the return type. Infer the 3217 // rest of the function argument types from the arguments that are present. 3218 const PointerType *PFTy = 0; 3219 const FunctionType *Ty = 0; 3220 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3221 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3222 // Pull out the types of all of the arguments... 3223 std::vector<const Type*> ParamTypes; 3224 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3225 ParamTypes.push_back(ArgList[i].V->getType()); 3226 3227 if (!FunctionType::isValidReturnType(RetType)) 3228 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3229 3230 Ty = FunctionType::get(RetType, ParamTypes, false); 3231 PFTy = PointerType::getUnqual(Ty); 3232 } 3233 3234 // Look up the callee. 3235 Value *Callee; 3236 if (ConvertValIDToValue(PFTy, CalleeID, Callee, PFS)) return true; 3237 3238 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 3239 // function attributes. 3240 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 3241 if (FnAttrs & ObsoleteFuncAttrs) { 3242 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 3243 FnAttrs &= ~ObsoleteFuncAttrs; 3244 } 3245 3246 // Set up the Attributes for the function. 3247 SmallVector<AttributeWithIndex, 8> Attrs; 3248 if (RetAttrs != Attribute::None) 3249 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3250 3251 SmallVector<Value*, 8> Args; 3252 3253 // Loop through FunctionType's arguments and ensure they are specified 3254 // correctly. Also, gather any parameter attributes. 3255 FunctionType::param_iterator I = Ty->param_begin(); 3256 FunctionType::param_iterator E = Ty->param_end(); 3257 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3258 const Type *ExpectedTy = 0; 3259 if (I != E) { 3260 ExpectedTy = *I++; 3261 } else if (!Ty->isVarArg()) { 3262 return Error(ArgList[i].Loc, "too many arguments specified"); 3263 } 3264 3265 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3266 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3267 ExpectedTy->getDescription() + "'"); 3268 Args.push_back(ArgList[i].V); 3269 if (ArgList[i].Attrs != Attribute::None) 3270 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3271 } 3272 3273 if (I != E) 3274 return Error(CallLoc, "not enough parameters specified for call"); 3275 3276 if (FnAttrs != Attribute::None) 3277 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3278 3279 // Finish off the Attributes and check them 3280 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3281 3282 InvokeInst *II = InvokeInst::Create(Callee, NormalBB, UnwindBB, 3283 Args.begin(), Args.end()); 3284 II->setCallingConv(CC); 3285 II->setAttributes(PAL); 3286 Inst = II; 3287 return false; 3288} 3289 3290 3291 3292//===----------------------------------------------------------------------===// 3293// Binary Operators. 3294//===----------------------------------------------------------------------===// 3295 3296/// ParseArithmetic 3297/// ::= ArithmeticOps TypeAndValue ',' Value 3298/// 3299/// If OperandType is 0, then any FP or integer operand is allowed. If it is 1, 3300/// then any integer operand is allowed, if it is 2, any fp operand is allowed. 3301bool LLParser::ParseArithmetic(Instruction *&Inst, PerFunctionState &PFS, 3302 unsigned Opc, unsigned OperandType) { 3303 LocTy Loc; Value *LHS, *RHS; 3304 if (ParseTypeAndValue(LHS, Loc, PFS) || 3305 ParseToken(lltok::comma, "expected ',' in arithmetic operation") || 3306 ParseValue(LHS->getType(), RHS, PFS)) 3307 return true; 3308 3309 bool Valid; 3310 switch (OperandType) { 3311 default: llvm_unreachable("Unknown operand type!"); 3312 case 0: // int or FP. 3313 Valid = LHS->getType()->isIntOrIntVector() || 3314 LHS->getType()->isFPOrFPVector(); 3315 break; 3316 case 1: Valid = LHS->getType()->isIntOrIntVector(); break; 3317 case 2: Valid = LHS->getType()->isFPOrFPVector(); break; 3318 } 3319 3320 if (!Valid) 3321 return Error(Loc, "invalid operand type for instruction"); 3322 3323 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3324 return false; 3325} 3326 3327/// ParseLogical 3328/// ::= ArithmeticOps TypeAndValue ',' Value { 3329bool LLParser::ParseLogical(Instruction *&Inst, PerFunctionState &PFS, 3330 unsigned Opc) { 3331 LocTy Loc; Value *LHS, *RHS; 3332 if (ParseTypeAndValue(LHS, Loc, PFS) || 3333 ParseToken(lltok::comma, "expected ',' in logical operation") || 3334 ParseValue(LHS->getType(), RHS, PFS)) 3335 return true; 3336 3337 if (!LHS->getType()->isIntOrIntVector()) 3338 return Error(Loc,"instruction requires integer or integer vector operands"); 3339 3340 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3341 return false; 3342} 3343 3344 3345/// ParseCompare 3346/// ::= 'icmp' IPredicates TypeAndValue ',' Value 3347/// ::= 'fcmp' FPredicates TypeAndValue ',' Value 3348bool LLParser::ParseCompare(Instruction *&Inst, PerFunctionState &PFS, 3349 unsigned Opc) { 3350 // Parse the integer/fp comparison predicate. 3351 LocTy Loc; 3352 unsigned Pred; 3353 Value *LHS, *RHS; 3354 if (ParseCmpPredicate(Pred, Opc) || 3355 ParseTypeAndValue(LHS, Loc, PFS) || 3356 ParseToken(lltok::comma, "expected ',' after compare value") || 3357 ParseValue(LHS->getType(), RHS, PFS)) 3358 return true; 3359 3360 if (Opc == Instruction::FCmp) { 3361 if (!LHS->getType()->isFPOrFPVector()) 3362 return Error(Loc, "fcmp requires floating point operands"); 3363 Inst = new FCmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3364 } else { 3365 assert(Opc == Instruction::ICmp && "Unknown opcode for CmpInst!"); 3366 if (!LHS->getType()->isIntOrIntVector() && 3367 !isa<PointerType>(LHS->getType())) 3368 return Error(Loc, "icmp requires integer operands"); 3369 Inst = new ICmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3370 } 3371 return false; 3372} 3373 3374//===----------------------------------------------------------------------===// 3375// Other Instructions. 3376//===----------------------------------------------------------------------===// 3377 3378 3379/// ParseCast 3380/// ::= CastOpc TypeAndValue 'to' Type 3381bool LLParser::ParseCast(Instruction *&Inst, PerFunctionState &PFS, 3382 unsigned Opc) { 3383 LocTy Loc; Value *Op; 3384 PATypeHolder DestTy(Type::getVoidTy(Context)); 3385 if (ParseTypeAndValue(Op, Loc, PFS) || 3386 ParseToken(lltok::kw_to, "expected 'to' after cast value") || 3387 ParseType(DestTy)) 3388 return true; 3389 3390 if (!CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy)) { 3391 CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy); 3392 return Error(Loc, "invalid cast opcode for cast from '" + 3393 Op->getType()->getDescription() + "' to '" + 3394 DestTy->getDescription() + "'"); 3395 } 3396 Inst = CastInst::Create((Instruction::CastOps)Opc, Op, DestTy); 3397 return false; 3398} 3399 3400/// ParseSelect 3401/// ::= 'select' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3402bool LLParser::ParseSelect(Instruction *&Inst, PerFunctionState &PFS) { 3403 LocTy Loc; 3404 Value *Op0, *Op1, *Op2; 3405 if (ParseTypeAndValue(Op0, Loc, PFS) || 3406 ParseToken(lltok::comma, "expected ',' after select condition") || 3407 ParseTypeAndValue(Op1, PFS) || 3408 ParseToken(lltok::comma, "expected ',' after select value") || 3409 ParseTypeAndValue(Op2, PFS)) 3410 return true; 3411 3412 if (const char *Reason = SelectInst::areInvalidOperands(Op0, Op1, Op2)) 3413 return Error(Loc, Reason); 3414 3415 Inst = SelectInst::Create(Op0, Op1, Op2); 3416 return false; 3417} 3418 3419/// ParseVA_Arg 3420/// ::= 'va_arg' TypeAndValue ',' Type 3421bool LLParser::ParseVA_Arg(Instruction *&Inst, PerFunctionState &PFS) { 3422 Value *Op; 3423 PATypeHolder EltTy(Type::getVoidTy(Context)); 3424 LocTy TypeLoc; 3425 if (ParseTypeAndValue(Op, PFS) || 3426 ParseToken(lltok::comma, "expected ',' after vaarg operand") || 3427 ParseType(EltTy, TypeLoc)) 3428 return true; 3429 3430 if (!EltTy->isFirstClassType()) 3431 return Error(TypeLoc, "va_arg requires operand with first class type"); 3432 3433 Inst = new VAArgInst(Op, EltTy); 3434 return false; 3435} 3436 3437/// ParseExtractElement 3438/// ::= 'extractelement' TypeAndValue ',' TypeAndValue 3439bool LLParser::ParseExtractElement(Instruction *&Inst, PerFunctionState &PFS) { 3440 LocTy Loc; 3441 Value *Op0, *Op1; 3442 if (ParseTypeAndValue(Op0, Loc, PFS) || 3443 ParseToken(lltok::comma, "expected ',' after extract value") || 3444 ParseTypeAndValue(Op1, PFS)) 3445 return true; 3446 3447 if (!ExtractElementInst::isValidOperands(Op0, Op1)) 3448 return Error(Loc, "invalid extractelement operands"); 3449 3450 Inst = ExtractElementInst::Create(Op0, Op1); 3451 return false; 3452} 3453 3454/// ParseInsertElement 3455/// ::= 'insertelement' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3456bool LLParser::ParseInsertElement(Instruction *&Inst, PerFunctionState &PFS) { 3457 LocTy Loc; 3458 Value *Op0, *Op1, *Op2; 3459 if (ParseTypeAndValue(Op0, Loc, PFS) || 3460 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3461 ParseTypeAndValue(Op1, PFS) || 3462 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3463 ParseTypeAndValue(Op2, PFS)) 3464 return true; 3465 3466 if (!InsertElementInst::isValidOperands(Op0, Op1, Op2)) 3467 return Error(Loc, "invalid insertelement operands"); 3468 3469 Inst = InsertElementInst::Create(Op0, Op1, Op2); 3470 return false; 3471} 3472 3473/// ParseShuffleVector 3474/// ::= 'shufflevector' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3475bool LLParser::ParseShuffleVector(Instruction *&Inst, PerFunctionState &PFS) { 3476 LocTy Loc; 3477 Value *Op0, *Op1, *Op2; 3478 if (ParseTypeAndValue(Op0, Loc, PFS) || 3479 ParseToken(lltok::comma, "expected ',' after shuffle mask") || 3480 ParseTypeAndValue(Op1, PFS) || 3481 ParseToken(lltok::comma, "expected ',' after shuffle value") || 3482 ParseTypeAndValue(Op2, PFS)) 3483 return true; 3484 3485 if (!ShuffleVectorInst::isValidOperands(Op0, Op1, Op2)) 3486 return Error(Loc, "invalid extractelement operands"); 3487 3488 Inst = new ShuffleVectorInst(Op0, Op1, Op2); 3489 return false; 3490} 3491 3492/// ParsePHI 3493/// ::= 'phi' Type '[' Value ',' Value ']' (',' '[' Value ',' Value ']')* 3494bool LLParser::ParsePHI(Instruction *&Inst, PerFunctionState &PFS) { 3495 PATypeHolder Ty(Type::getVoidTy(Context)); 3496 Value *Op0, *Op1; 3497 LocTy TypeLoc = Lex.getLoc(); 3498 3499 if (ParseType(Ty) || 3500 ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3501 ParseValue(Ty, Op0, PFS) || 3502 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3503 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3504 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3505 return true; 3506 3507 SmallVector<std::pair<Value*, BasicBlock*>, 16> PHIVals; 3508 while (1) { 3509 PHIVals.push_back(std::make_pair(Op0, cast<BasicBlock>(Op1))); 3510 3511 if (!EatIfPresent(lltok::comma)) 3512 break; 3513 3514 if (Lex.getKind() == lltok::MetadataVar) 3515 break; 3516 3517 if (ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3518 ParseValue(Ty, Op0, PFS) || 3519 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3520 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3521 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3522 return true; 3523 } 3524 3525 if (Lex.getKind() == lltok::MetadataVar) 3526 if (ParseOptionalCustomMetadata()) return true; 3527 3528 if (!Ty->isFirstClassType()) 3529 return Error(TypeLoc, "phi node must have first class type"); 3530 3531 PHINode *PN = PHINode::Create(Ty); 3532 PN->reserveOperandSpace(PHIVals.size()); 3533 for (unsigned i = 0, e = PHIVals.size(); i != e; ++i) 3534 PN->addIncoming(PHIVals[i].first, PHIVals[i].second); 3535 Inst = PN; 3536 return false; 3537} 3538 3539/// ParseCall 3540/// ::= 'tail'? 'call' OptionalCallingConv OptionalAttrs Type Value 3541/// ParameterList OptionalAttrs 3542bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS, 3543 bool isTail) { 3544 unsigned RetAttrs, FnAttrs; 3545 CallingConv::ID CC; 3546 PATypeHolder RetType(Type::getVoidTy(Context)); 3547 LocTy RetTypeLoc; 3548 ValID CalleeID; 3549 SmallVector<ParamInfo, 16> ArgList; 3550 LocTy CallLoc = Lex.getLoc(); 3551 3552 if ((isTail && ParseToken(lltok::kw_call, "expected 'tail call'")) || 3553 ParseOptionalCallingConv(CC) || 3554 ParseOptionalAttrs(RetAttrs, 1) || 3555 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3556 ParseValID(CalleeID) || 3557 ParseParameterList(ArgList, PFS) || 3558 ParseOptionalAttrs(FnAttrs, 2)) 3559 return true; 3560 3561 // If RetType is a non-function pointer type, then this is the short syntax 3562 // for the call, which means that RetType is just the return type. Infer the 3563 // rest of the function argument types from the arguments that are present. 3564 const PointerType *PFTy = 0; 3565 const FunctionType *Ty = 0; 3566 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3567 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3568 // Pull out the types of all of the arguments... 3569 std::vector<const Type*> ParamTypes; 3570 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3571 ParamTypes.push_back(ArgList[i].V->getType()); 3572 3573 if (!FunctionType::isValidReturnType(RetType)) 3574 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3575 3576 Ty = FunctionType::get(RetType, ParamTypes, false); 3577 PFTy = PointerType::getUnqual(Ty); 3578 } 3579 3580 // Look up the callee. 3581 Value *Callee; 3582 if (ConvertValIDToValue(PFTy, CalleeID, Callee, PFS)) return true; 3583 3584 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 3585 // function attributes. 3586 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 3587 if (FnAttrs & ObsoleteFuncAttrs) { 3588 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 3589 FnAttrs &= ~ObsoleteFuncAttrs; 3590 } 3591 3592 // Set up the Attributes for the function. 3593 SmallVector<AttributeWithIndex, 8> Attrs; 3594 if (RetAttrs != Attribute::None) 3595 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3596 3597 SmallVector<Value*, 8> Args; 3598 3599 // Loop through FunctionType's arguments and ensure they are specified 3600 // correctly. Also, gather any parameter attributes. 3601 FunctionType::param_iterator I = Ty->param_begin(); 3602 FunctionType::param_iterator E = Ty->param_end(); 3603 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3604 const Type *ExpectedTy = 0; 3605 if (I != E) { 3606 ExpectedTy = *I++; 3607 } else if (!Ty->isVarArg()) { 3608 return Error(ArgList[i].Loc, "too many arguments specified"); 3609 } 3610 3611 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3612 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3613 ExpectedTy->getDescription() + "'"); 3614 Args.push_back(ArgList[i].V); 3615 if (ArgList[i].Attrs != Attribute::None) 3616 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3617 } 3618 3619 if (I != E) 3620 return Error(CallLoc, "not enough parameters specified for call"); 3621 3622 if (FnAttrs != Attribute::None) 3623 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3624 3625 // Finish off the Attributes and check them 3626 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3627 3628 CallInst *CI = CallInst::Create(Callee, Args.begin(), Args.end()); 3629 CI->setTailCall(isTail); 3630 CI->setCallingConv(CC); 3631 CI->setAttributes(PAL); 3632 Inst = CI; 3633 return false; 3634} 3635 3636//===----------------------------------------------------------------------===// 3637// Memory Instructions. 3638//===----------------------------------------------------------------------===// 3639 3640/// ParseAlloc 3641/// ::= 'malloc' Type (',' TypeAndValue)? (',' OptionalInfo)? 3642/// ::= 'alloca' Type (',' TypeAndValue)? (',' OptionalInfo)? 3643bool LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS, 3644 BasicBlock* BB, bool isAlloca) { 3645 PATypeHolder Ty(Type::getVoidTy(Context)); 3646 Value *Size = 0; 3647 LocTy SizeLoc; 3648 unsigned Alignment = 0; 3649 if (ParseType(Ty)) return true; 3650 3651 if (EatIfPresent(lltok::comma)) { 3652 if (Lex.getKind() == lltok::kw_align 3653 || Lex.getKind() == lltok::MetadataVar) { 3654 if (ParseOptionalInfo(Alignment)) return true; 3655 } else { 3656 if (ParseTypeAndValue(Size, SizeLoc, PFS)) return true; 3657 if (EatIfPresent(lltok::comma)) 3658 if (ParseOptionalInfo(Alignment)) return true; 3659 } 3660 } 3661 3662 if (Size && Size->getType() != Type::getInt32Ty(Context)) 3663 return Error(SizeLoc, "element count must be i32"); 3664 3665 if (isAlloca) { 3666 Inst = new AllocaInst(Ty, Size, Alignment); 3667 return false; 3668 } 3669 3670 // Autoupgrade old malloc instruction to malloc call. 3671 // FIXME: Remove in LLVM 3.0. 3672 const Type *IntPtrTy = Type::getInt32Ty(Context); 3673 Constant *AllocSize = ConstantExpr::getSizeOf(Ty); 3674 AllocSize = ConstantExpr::getTruncOrBitCast(AllocSize, IntPtrTy); 3675 if (!MallocF) 3676 // Prototype malloc as "void *(int32)". 3677 // This function is renamed as "malloc" in ValidateEndOfModule(). 3678 MallocF = cast<Function>( 3679 M->getOrInsertFunction("", Type::getInt8PtrTy(Context), IntPtrTy, NULL)); 3680 Inst = CallInst::CreateMalloc(BB, IntPtrTy, Ty, AllocSize, Size, MallocF); 3681 return false; 3682} 3683 3684/// ParseFree 3685/// ::= 'free' TypeAndValue 3686bool LLParser::ParseFree(Instruction *&Inst, PerFunctionState &PFS, 3687 BasicBlock* BB) { 3688 Value *Val; LocTy Loc; 3689 if (ParseTypeAndValue(Val, Loc, PFS)) return true; 3690 if (!isa<PointerType>(Val->getType())) 3691 return Error(Loc, "operand to free must be a pointer"); 3692 Inst = CallInst::CreateFree(Val, BB); 3693 return false; 3694} 3695 3696/// ParseLoad 3697/// ::= 'volatile'? 'load' TypeAndValue (',' OptionalInfo)? 3698bool LLParser::ParseLoad(Instruction *&Inst, PerFunctionState &PFS, 3699 bool isVolatile) { 3700 Value *Val; LocTy Loc; 3701 unsigned Alignment = 0; 3702 if (ParseTypeAndValue(Val, Loc, PFS)) return true; 3703 3704 if (EatIfPresent(lltok::comma)) 3705 if (ParseOptionalInfo(Alignment)) return true; 3706 3707 if (!isa<PointerType>(Val->getType()) || 3708 !cast<PointerType>(Val->getType())->getElementType()->isFirstClassType()) 3709 return Error(Loc, "load operand must be a pointer to a first class type"); 3710 3711 Inst = new LoadInst(Val, "", isVolatile, Alignment); 3712 return false; 3713} 3714 3715/// ParseStore 3716/// ::= 'volatile'? 'store' TypeAndValue ',' TypeAndValue (',' 'align' i32)? 3717bool LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS, 3718 bool isVolatile) { 3719 Value *Val, *Ptr; LocTy Loc, PtrLoc; 3720 unsigned Alignment = 0; 3721 if (ParseTypeAndValue(Val, Loc, PFS) || 3722 ParseToken(lltok::comma, "expected ',' after store operand") || 3723 ParseTypeAndValue(Ptr, PtrLoc, PFS)) 3724 return true; 3725 3726 if (EatIfPresent(lltok::comma)) 3727 if (ParseOptionalInfo(Alignment)) return true; 3728 3729 if (!isa<PointerType>(Ptr->getType())) 3730 return Error(PtrLoc, "store operand must be a pointer"); 3731 if (!Val->getType()->isFirstClassType()) 3732 return Error(Loc, "store operand must be a first class value"); 3733 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType()) 3734 return Error(Loc, "stored value and pointer type do not match"); 3735 3736 Inst = new StoreInst(Val, Ptr, isVolatile, Alignment); 3737 return false; 3738} 3739 3740/// ParseGetResult 3741/// ::= 'getresult' TypeAndValue ',' i32 3742/// FIXME: Remove support for getresult in LLVM 3.0 3743bool LLParser::ParseGetResult(Instruction *&Inst, PerFunctionState &PFS) { 3744 Value *Val; LocTy ValLoc, EltLoc; 3745 unsigned Element; 3746 if (ParseTypeAndValue(Val, ValLoc, PFS) || 3747 ParseToken(lltok::comma, "expected ',' after getresult operand") || 3748 ParseUInt32(Element, EltLoc)) 3749 return true; 3750 3751 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 3752 return Error(ValLoc, "getresult inst requires an aggregate operand"); 3753 if (!ExtractValueInst::getIndexedType(Val->getType(), Element)) 3754 return Error(EltLoc, "invalid getresult index for value"); 3755 Inst = ExtractValueInst::Create(Val, Element); 3756 return false; 3757} 3758 3759/// ParseGetElementPtr 3760/// ::= 'getelementptr' 'inbounds'? TypeAndValue (',' TypeAndValue)* 3761bool LLParser::ParseGetElementPtr(Instruction *&Inst, PerFunctionState &PFS) { 3762 Value *Ptr, *Val; LocTy Loc, EltLoc; 3763 3764 bool InBounds = EatIfPresent(lltok::kw_inbounds); 3765 3766 if (ParseTypeAndValue(Ptr, Loc, PFS)) return true; 3767 3768 if (!isa<PointerType>(Ptr->getType())) 3769 return Error(Loc, "base of getelementptr must be a pointer"); 3770 3771 SmallVector<Value*, 16> Indices; 3772 while (EatIfPresent(lltok::comma)) { 3773 if (Lex.getKind() == lltok::MetadataVar) 3774 break; 3775 if (ParseTypeAndValue(Val, EltLoc, PFS)) return true; 3776 if (!isa<IntegerType>(Val->getType())) 3777 return Error(EltLoc, "getelementptr index must be an integer"); 3778 Indices.push_back(Val); 3779 } 3780 if (Lex.getKind() == lltok::MetadataVar) 3781 if (ParseOptionalCustomMetadata()) return true; 3782 3783 if (!GetElementPtrInst::getIndexedType(Ptr->getType(), 3784 Indices.begin(), Indices.end())) 3785 return Error(Loc, "invalid getelementptr indices"); 3786 Inst = GetElementPtrInst::Create(Ptr, Indices.begin(), Indices.end()); 3787 if (InBounds) 3788 cast<GetElementPtrInst>(Inst)->setIsInBounds(true); 3789 return false; 3790} 3791 3792/// ParseExtractValue 3793/// ::= 'extractvalue' TypeAndValue (',' uint32)+ 3794bool LLParser::ParseExtractValue(Instruction *&Inst, PerFunctionState &PFS) { 3795 Value *Val; LocTy Loc; 3796 SmallVector<unsigned, 4> Indices; 3797 bool ParsedExtraComma; 3798 if (ParseTypeAndValue(Val, Loc, PFS) || 3799 ParseIndexList(Indices, ParsedExtraComma)) 3800 return true; 3801 if (ParsedExtraComma) { 3802 assert(Lex.getKind() == lltok::MetadataVar && "Should only happen for md"); 3803 if (ParseOptionalCustomMetadata()) return true; 3804 } 3805 3806 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 3807 return Error(Loc, "extractvalue operand must be array or struct"); 3808 3809 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 3810 Indices.end())) 3811 return Error(Loc, "invalid indices for extractvalue"); 3812 Inst = ExtractValueInst::Create(Val, Indices.begin(), Indices.end()); 3813 return false; 3814} 3815 3816/// ParseInsertValue 3817/// ::= 'insertvalue' TypeAndValue ',' TypeAndValue (',' uint32)+ 3818bool LLParser::ParseInsertValue(Instruction *&Inst, PerFunctionState &PFS) { 3819 Value *Val0, *Val1; LocTy Loc0, Loc1; 3820 SmallVector<unsigned, 4> Indices; 3821 bool ParsedExtraComma; 3822 if (ParseTypeAndValue(Val0, Loc0, PFS) || 3823 ParseToken(lltok::comma, "expected comma after insertvalue operand") || 3824 ParseTypeAndValue(Val1, Loc1, PFS) || 3825 ParseIndexList(Indices, ParsedExtraComma)) 3826 return true; 3827 if (ParsedExtraComma) { 3828 assert(Lex.getKind() == lltok::MetadataVar && "Should only happen for md"); 3829 if (ParseOptionalCustomMetadata()) return true; 3830 } 3831 3832 if (!isa<StructType>(Val0->getType()) && !isa<ArrayType>(Val0->getType())) 3833 return Error(Loc0, "extractvalue operand must be array or struct"); 3834 3835 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 3836 Indices.end())) 3837 return Error(Loc0, "invalid indices for insertvalue"); 3838 Inst = InsertValueInst::Create(Val0, Val1, Indices.begin(), Indices.end()); 3839 return false; 3840} 3841 3842//===----------------------------------------------------------------------===// 3843// Embedded metadata. 3844//===----------------------------------------------------------------------===// 3845 3846/// ParseMDNodeVector 3847/// ::= Element (',' Element)* 3848/// Element 3849/// ::= 'null' | TypeAndValue 3850bool LLParser::ParseMDNodeVector(SmallVectorImpl<Value*> &Elts) { 3851 do { 3852 // Null is a special case since it is typeless. 3853 if (EatIfPresent(lltok::kw_null)) { 3854 Elts.push_back(0); 3855 continue; 3856 } 3857 3858 Value *V = 0; 3859 PATypeHolder Ty(Type::getVoidTy(Context)); 3860 ValID ID; 3861 if (ParseType(Ty) || ParseValID(ID) || 3862 ConvertGlobalOrMetadataValIDToValue(Ty, ID, V)) 3863 return true; 3864 3865 Elts.push_back(V); 3866 } while (EatIfPresent(lltok::comma)); 3867 3868 return false; 3869} 3870