LLParser.cpp revision 201360
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 if (ParseUInt32(MetadataID) || 542 ParseToken(lltok::equal, "expected '=' here") || 543 ParseType(Ty, TyLoc) || 544 ParseToken(lltok::exclaim, "Expected '!' here") || 545 ParseToken(lltok::lbrace, "Expected '{' here") || 546 ParseMDNodeVector(Elts) || 547 ParseToken(lltok::rbrace, "expected end of metadata node")) 548 return true; 549 550 MDNode *Init = MDNode::get(Context, Elts.data(), Elts.size()); 551 552 // See if this was forward referenced, if so, handle it. 553 std::map<unsigned, std::pair<TrackingVH<MDNode>, LocTy> >::iterator 554 FI = ForwardRefMDNodes.find(MetadataID); 555 if (FI != ForwardRefMDNodes.end()) { 556 FI->second.first->replaceAllUsesWith(Init); 557 ForwardRefMDNodes.erase(FI); 558 559 assert(NumberedMetadata[MetadataID] == Init && "Tracking VH didn't work"); 560 } else { 561 if (MetadataID >= NumberedMetadata.size()) 562 NumberedMetadata.resize(MetadataID+1); 563 564 if (NumberedMetadata[MetadataID] != 0) 565 return TokError("Metadata id is already used"); 566 NumberedMetadata[MetadataID] = Init; 567 } 568 569 return false; 570} 571 572/// ParseAlias: 573/// ::= GlobalVar '=' OptionalVisibility 'alias' OptionalLinkage Aliasee 574/// Aliasee 575/// ::= TypeAndValue 576/// ::= 'bitcast' '(' TypeAndValue 'to' Type ')' 577/// ::= 'getelementptr' 'inbounds'? '(' ... ')' 578/// 579/// Everything through visibility has already been parsed. 580/// 581bool LLParser::ParseAlias(const std::string &Name, LocTy NameLoc, 582 unsigned Visibility) { 583 assert(Lex.getKind() == lltok::kw_alias); 584 Lex.Lex(); 585 unsigned Linkage; 586 LocTy LinkageLoc = Lex.getLoc(); 587 if (ParseOptionalLinkage(Linkage)) 588 return true; 589 590 if (Linkage != GlobalValue::ExternalLinkage && 591 Linkage != GlobalValue::WeakAnyLinkage && 592 Linkage != GlobalValue::WeakODRLinkage && 593 Linkage != GlobalValue::InternalLinkage && 594 Linkage != GlobalValue::PrivateLinkage && 595 Linkage != GlobalValue::LinkerPrivateLinkage) 596 return Error(LinkageLoc, "invalid linkage type for alias"); 597 598 Constant *Aliasee; 599 LocTy AliaseeLoc = Lex.getLoc(); 600 if (Lex.getKind() != lltok::kw_bitcast && 601 Lex.getKind() != lltok::kw_getelementptr) { 602 if (ParseGlobalTypeAndValue(Aliasee)) return true; 603 } else { 604 // The bitcast dest type is not present, it is implied by the dest type. 605 ValID ID; 606 if (ParseValID(ID)) return true; 607 if (ID.Kind != ValID::t_Constant) 608 return Error(AliaseeLoc, "invalid aliasee"); 609 Aliasee = ID.ConstantVal; 610 } 611 612 if (!isa<PointerType>(Aliasee->getType())) 613 return Error(AliaseeLoc, "alias must have pointer type"); 614 615 // Okay, create the alias but do not insert it into the module yet. 616 GlobalAlias* GA = new GlobalAlias(Aliasee->getType(), 617 (GlobalValue::LinkageTypes)Linkage, Name, 618 Aliasee); 619 GA->setVisibility((GlobalValue::VisibilityTypes)Visibility); 620 621 // See if this value already exists in the symbol table. If so, it is either 622 // a redefinition or a definition of a forward reference. 623 if (GlobalValue *Val = M->getNamedValue(Name)) { 624 // See if this was a redefinition. If so, there is no entry in 625 // ForwardRefVals. 626 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 627 I = ForwardRefVals.find(Name); 628 if (I == ForwardRefVals.end()) 629 return Error(NameLoc, "redefinition of global named '@" + Name + "'"); 630 631 // Otherwise, this was a definition of forward ref. Verify that types 632 // agree. 633 if (Val->getType() != GA->getType()) 634 return Error(NameLoc, 635 "forward reference and definition of alias have different types"); 636 637 // If they agree, just RAUW the old value with the alias and remove the 638 // forward ref info. 639 Val->replaceAllUsesWith(GA); 640 Val->eraseFromParent(); 641 ForwardRefVals.erase(I); 642 } 643 644 // Insert into the module, we know its name won't collide now. 645 M->getAliasList().push_back(GA); 646 assert(GA->getNameStr() == Name && "Should not be a name conflict!"); 647 648 return false; 649} 650 651/// ParseGlobal 652/// ::= GlobalVar '=' OptionalLinkage OptionalVisibility OptionalThreadLocal 653/// OptionalAddrSpace GlobalType Type Const 654/// ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 655/// OptionalAddrSpace GlobalType Type Const 656/// 657/// Everything through visibility has been parsed already. 658/// 659bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc, 660 unsigned Linkage, bool HasLinkage, 661 unsigned Visibility) { 662 unsigned AddrSpace; 663 bool ThreadLocal, IsConstant; 664 LocTy TyLoc; 665 666 PATypeHolder Ty(Type::getVoidTy(Context)); 667 if (ParseOptionalToken(lltok::kw_thread_local, ThreadLocal) || 668 ParseOptionalAddrSpace(AddrSpace) || 669 ParseGlobalType(IsConstant) || 670 ParseType(Ty, TyLoc)) 671 return true; 672 673 // If the linkage is specified and is external, then no initializer is 674 // present. 675 Constant *Init = 0; 676 if (!HasLinkage || (Linkage != GlobalValue::DLLImportLinkage && 677 Linkage != GlobalValue::ExternalWeakLinkage && 678 Linkage != GlobalValue::ExternalLinkage)) { 679 if (ParseGlobalValue(Ty, Init)) 680 return true; 681 } 682 683 if (isa<FunctionType>(Ty) || Ty->isLabelTy()) 684 return Error(TyLoc, "invalid type for global variable"); 685 686 GlobalVariable *GV = 0; 687 688 // See if the global was forward referenced, if so, use the global. 689 if (!Name.empty()) { 690 if (GlobalValue *GVal = M->getNamedValue(Name)) { 691 if (!ForwardRefVals.erase(Name) || !isa<GlobalValue>(GVal)) 692 return Error(NameLoc, "redefinition of global '@" + Name + "'"); 693 GV = cast<GlobalVariable>(GVal); 694 } 695 } else { 696 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 697 I = ForwardRefValIDs.find(NumberedVals.size()); 698 if (I != ForwardRefValIDs.end()) { 699 GV = cast<GlobalVariable>(I->second.first); 700 ForwardRefValIDs.erase(I); 701 } 702 } 703 704 if (GV == 0) { 705 GV = new GlobalVariable(*M, Ty, false, GlobalValue::ExternalLinkage, 0, 706 Name, 0, false, AddrSpace); 707 } else { 708 if (GV->getType()->getElementType() != Ty) 709 return Error(TyLoc, 710 "forward reference and definition of global have different types"); 711 712 // Move the forward-reference to the correct spot in the module. 713 M->getGlobalList().splice(M->global_end(), M->getGlobalList(), GV); 714 } 715 716 if (Name.empty()) 717 NumberedVals.push_back(GV); 718 719 // Set the parsed properties on the global. 720 if (Init) 721 GV->setInitializer(Init); 722 GV->setConstant(IsConstant); 723 GV->setLinkage((GlobalValue::LinkageTypes)Linkage); 724 GV->setVisibility((GlobalValue::VisibilityTypes)Visibility); 725 GV->setThreadLocal(ThreadLocal); 726 727 // Parse attributes on the global. 728 while (Lex.getKind() == lltok::comma) { 729 Lex.Lex(); 730 731 if (Lex.getKind() == lltok::kw_section) { 732 Lex.Lex(); 733 GV->setSection(Lex.getStrVal()); 734 if (ParseToken(lltok::StringConstant, "expected global section string")) 735 return true; 736 } else if (Lex.getKind() == lltok::kw_align) { 737 unsigned Alignment; 738 if (ParseOptionalAlignment(Alignment)) return true; 739 GV->setAlignment(Alignment); 740 } else { 741 TokError("unknown global variable property!"); 742 } 743 } 744 745 return false; 746} 747 748 749//===----------------------------------------------------------------------===// 750// GlobalValue Reference/Resolution Routines. 751//===----------------------------------------------------------------------===// 752 753/// GetGlobalVal - Get a value with the specified name or ID, creating a 754/// forward reference record if needed. This can return null if the value 755/// exists but does not have the right type. 756GlobalValue *LLParser::GetGlobalVal(const std::string &Name, const Type *Ty, 757 LocTy Loc) { 758 const PointerType *PTy = dyn_cast<PointerType>(Ty); 759 if (PTy == 0) { 760 Error(Loc, "global variable reference must have pointer type"); 761 return 0; 762 } 763 764 // Look this name up in the normal function symbol table. 765 GlobalValue *Val = 766 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name)); 767 768 // If this is a forward reference for the value, see if we already created a 769 // forward ref record. 770 if (Val == 0) { 771 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 772 I = ForwardRefVals.find(Name); 773 if (I != ForwardRefVals.end()) 774 Val = I->second.first; 775 } 776 777 // If we have the value in the symbol table or fwd-ref table, return it. 778 if (Val) { 779 if (Val->getType() == Ty) return Val; 780 Error(Loc, "'@" + Name + "' defined with type '" + 781 Val->getType()->getDescription() + "'"); 782 return 0; 783 } 784 785 // Otherwise, create a new forward reference for this value and remember it. 786 GlobalValue *FwdVal; 787 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 788 // Function types can return opaque but functions can't. 789 if (isa<OpaqueType>(FT->getReturnType())) { 790 Error(Loc, "function may not return opaque type"); 791 return 0; 792 } 793 794 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M); 795 } else { 796 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 797 GlobalValue::ExternalWeakLinkage, 0, Name); 798 } 799 800 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 801 return FwdVal; 802} 803 804GlobalValue *LLParser::GetGlobalVal(unsigned ID, const Type *Ty, LocTy Loc) { 805 const PointerType *PTy = dyn_cast<PointerType>(Ty); 806 if (PTy == 0) { 807 Error(Loc, "global variable reference must have pointer type"); 808 return 0; 809 } 810 811 GlobalValue *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 812 813 // If this is a forward reference for the value, see if we already created a 814 // forward ref record. 815 if (Val == 0) { 816 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 817 I = ForwardRefValIDs.find(ID); 818 if (I != ForwardRefValIDs.end()) 819 Val = I->second.first; 820 } 821 822 // If we have the value in the symbol table or fwd-ref table, return it. 823 if (Val) { 824 if (Val->getType() == Ty) return Val; 825 Error(Loc, "'@" + utostr(ID) + "' defined with type '" + 826 Val->getType()->getDescription() + "'"); 827 return 0; 828 } 829 830 // Otherwise, create a new forward reference for this value and remember it. 831 GlobalValue *FwdVal; 832 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 833 // Function types can return opaque but functions can't. 834 if (isa<OpaqueType>(FT->getReturnType())) { 835 Error(Loc, "function may not return opaque type"); 836 return 0; 837 } 838 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, "", M); 839 } else { 840 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 841 GlobalValue::ExternalWeakLinkage, 0, ""); 842 } 843 844 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 845 return FwdVal; 846} 847 848 849//===----------------------------------------------------------------------===// 850// Helper Routines. 851//===----------------------------------------------------------------------===// 852 853/// ParseToken - If the current token has the specified kind, eat it and return 854/// success. Otherwise, emit the specified error and return failure. 855bool LLParser::ParseToken(lltok::Kind T, const char *ErrMsg) { 856 if (Lex.getKind() != T) 857 return TokError(ErrMsg); 858 Lex.Lex(); 859 return false; 860} 861 862/// ParseStringConstant 863/// ::= StringConstant 864bool LLParser::ParseStringConstant(std::string &Result) { 865 if (Lex.getKind() != lltok::StringConstant) 866 return TokError("expected string constant"); 867 Result = Lex.getStrVal(); 868 Lex.Lex(); 869 return false; 870} 871 872/// ParseUInt32 873/// ::= uint32 874bool LLParser::ParseUInt32(unsigned &Val) { 875 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned()) 876 return TokError("expected integer"); 877 uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(0xFFFFFFFFULL+1); 878 if (Val64 != unsigned(Val64)) 879 return TokError("expected 32-bit integer (too large)"); 880 Val = Val64; 881 Lex.Lex(); 882 return false; 883} 884 885 886/// ParseOptionalAddrSpace 887/// := /*empty*/ 888/// := 'addrspace' '(' uint32 ')' 889bool LLParser::ParseOptionalAddrSpace(unsigned &AddrSpace) { 890 AddrSpace = 0; 891 if (!EatIfPresent(lltok::kw_addrspace)) 892 return false; 893 return ParseToken(lltok::lparen, "expected '(' in address space") || 894 ParseUInt32(AddrSpace) || 895 ParseToken(lltok::rparen, "expected ')' in address space"); 896} 897 898/// ParseOptionalAttrs - Parse a potentially empty attribute list. AttrKind 899/// indicates what kind of attribute list this is: 0: function arg, 1: result, 900/// 2: function attr. 901/// 3: function arg after value: FIXME: REMOVE IN LLVM 3.0 902bool LLParser::ParseOptionalAttrs(unsigned &Attrs, unsigned AttrKind) { 903 Attrs = Attribute::None; 904 LocTy AttrLoc = Lex.getLoc(); 905 906 while (1) { 907 switch (Lex.getKind()) { 908 case lltok::kw_sext: 909 case lltok::kw_zext: 910 // Treat these as signext/zeroext if they occur in the argument list after 911 // the value, as in "call i8 @foo(i8 10 sext)". If they occur before the 912 // value, as in "call i8 @foo(i8 sext (" then it is part of a constant 913 // expr. 914 // FIXME: REMOVE THIS IN LLVM 3.0 915 if (AttrKind == 3) { 916 if (Lex.getKind() == lltok::kw_sext) 917 Attrs |= Attribute::SExt; 918 else 919 Attrs |= Attribute::ZExt; 920 break; 921 } 922 // FALL THROUGH. 923 default: // End of attributes. 924 if (AttrKind != 2 && (Attrs & Attribute::FunctionOnly)) 925 return Error(AttrLoc, "invalid use of function-only attribute"); 926 927 if (AttrKind != 0 && AttrKind != 3 && (Attrs & Attribute::ParameterOnly)) 928 return Error(AttrLoc, "invalid use of parameter-only attribute"); 929 930 return false; 931 case lltok::kw_zeroext: Attrs |= Attribute::ZExt; break; 932 case lltok::kw_signext: Attrs |= Attribute::SExt; break; 933 case lltok::kw_inreg: Attrs |= Attribute::InReg; break; 934 case lltok::kw_sret: Attrs |= Attribute::StructRet; break; 935 case lltok::kw_noalias: Attrs |= Attribute::NoAlias; break; 936 case lltok::kw_nocapture: Attrs |= Attribute::NoCapture; break; 937 case lltok::kw_byval: Attrs |= Attribute::ByVal; break; 938 case lltok::kw_nest: Attrs |= Attribute::Nest; break; 939 940 case lltok::kw_noreturn: Attrs |= Attribute::NoReturn; break; 941 case lltok::kw_nounwind: Attrs |= Attribute::NoUnwind; break; 942 case lltok::kw_noinline: Attrs |= Attribute::NoInline; break; 943 case lltok::kw_readnone: Attrs |= Attribute::ReadNone; break; 944 case lltok::kw_readonly: Attrs |= Attribute::ReadOnly; break; 945 case lltok::kw_inlinehint: Attrs |= Attribute::InlineHint; break; 946 case lltok::kw_alwaysinline: Attrs |= Attribute::AlwaysInline; break; 947 case lltok::kw_optsize: Attrs |= Attribute::OptimizeForSize; break; 948 case lltok::kw_ssp: Attrs |= Attribute::StackProtect; break; 949 case lltok::kw_sspreq: Attrs |= Attribute::StackProtectReq; break; 950 case lltok::kw_noredzone: Attrs |= Attribute::NoRedZone; break; 951 case lltok::kw_noimplicitfloat: Attrs |= Attribute::NoImplicitFloat; break; 952 case lltok::kw_naked: Attrs |= Attribute::Naked; break; 953 954 case lltok::kw_align: { 955 unsigned Alignment; 956 if (ParseOptionalAlignment(Alignment)) 957 return true; 958 Attrs |= Attribute::constructAlignmentFromInt(Alignment); 959 continue; 960 } 961 } 962 Lex.Lex(); 963 } 964} 965 966/// ParseOptionalLinkage 967/// ::= /*empty*/ 968/// ::= 'private' 969/// ::= 'linker_private' 970/// ::= 'internal' 971/// ::= 'weak' 972/// ::= 'weak_odr' 973/// ::= 'linkonce' 974/// ::= 'linkonce_odr' 975/// ::= 'appending' 976/// ::= 'dllexport' 977/// ::= 'common' 978/// ::= 'dllimport' 979/// ::= 'extern_weak' 980/// ::= 'external' 981bool LLParser::ParseOptionalLinkage(unsigned &Res, bool &HasLinkage) { 982 HasLinkage = false; 983 switch (Lex.getKind()) { 984 default: Res=GlobalValue::ExternalLinkage; return false; 985 case lltok::kw_private: Res = GlobalValue::PrivateLinkage; break; 986 case lltok::kw_linker_private: Res = GlobalValue::LinkerPrivateLinkage; break; 987 case lltok::kw_internal: Res = GlobalValue::InternalLinkage; break; 988 case lltok::kw_weak: Res = GlobalValue::WeakAnyLinkage; break; 989 case lltok::kw_weak_odr: Res = GlobalValue::WeakODRLinkage; break; 990 case lltok::kw_linkonce: Res = GlobalValue::LinkOnceAnyLinkage; break; 991 case lltok::kw_linkonce_odr: Res = GlobalValue::LinkOnceODRLinkage; break; 992 case lltok::kw_available_externally: 993 Res = GlobalValue::AvailableExternallyLinkage; 994 break; 995 case lltok::kw_appending: Res = GlobalValue::AppendingLinkage; break; 996 case lltok::kw_dllexport: Res = GlobalValue::DLLExportLinkage; break; 997 case lltok::kw_common: Res = GlobalValue::CommonLinkage; break; 998 case lltok::kw_dllimport: Res = GlobalValue::DLLImportLinkage; break; 999 case lltok::kw_extern_weak: Res = GlobalValue::ExternalWeakLinkage; break; 1000 case lltok::kw_external: Res = GlobalValue::ExternalLinkage; break; 1001 } 1002 Lex.Lex(); 1003 HasLinkage = true; 1004 return false; 1005} 1006 1007/// ParseOptionalVisibility 1008/// ::= /*empty*/ 1009/// ::= 'default' 1010/// ::= 'hidden' 1011/// ::= 'protected' 1012/// 1013bool LLParser::ParseOptionalVisibility(unsigned &Res) { 1014 switch (Lex.getKind()) { 1015 default: Res = GlobalValue::DefaultVisibility; return false; 1016 case lltok::kw_default: Res = GlobalValue::DefaultVisibility; break; 1017 case lltok::kw_hidden: Res = GlobalValue::HiddenVisibility; break; 1018 case lltok::kw_protected: Res = GlobalValue::ProtectedVisibility; break; 1019 } 1020 Lex.Lex(); 1021 return false; 1022} 1023 1024/// ParseOptionalCallingConv 1025/// ::= /*empty*/ 1026/// ::= 'ccc' 1027/// ::= 'fastcc' 1028/// ::= 'coldcc' 1029/// ::= 'x86_stdcallcc' 1030/// ::= 'x86_fastcallcc' 1031/// ::= 'arm_apcscc' 1032/// ::= 'arm_aapcscc' 1033/// ::= 'arm_aapcs_vfpcc' 1034/// ::= 'msp430_intrcc' 1035/// ::= 'cc' UINT 1036/// 1037bool LLParser::ParseOptionalCallingConv(CallingConv::ID &CC) { 1038 switch (Lex.getKind()) { 1039 default: CC = CallingConv::C; return false; 1040 case lltok::kw_ccc: CC = CallingConv::C; break; 1041 case lltok::kw_fastcc: CC = CallingConv::Fast; break; 1042 case lltok::kw_coldcc: CC = CallingConv::Cold; break; 1043 case lltok::kw_x86_stdcallcc: CC = CallingConv::X86_StdCall; break; 1044 case lltok::kw_x86_fastcallcc: CC = CallingConv::X86_FastCall; break; 1045 case lltok::kw_arm_apcscc: CC = CallingConv::ARM_APCS; break; 1046 case lltok::kw_arm_aapcscc: CC = CallingConv::ARM_AAPCS; break; 1047 case lltok::kw_arm_aapcs_vfpcc:CC = CallingConv::ARM_AAPCS_VFP; break; 1048 case lltok::kw_msp430_intrcc: CC = CallingConv::MSP430_INTR; break; 1049 case lltok::kw_cc: { 1050 unsigned ArbitraryCC; 1051 Lex.Lex(); 1052 if (ParseUInt32(ArbitraryCC)) { 1053 return true; 1054 } else 1055 CC = static_cast<CallingConv::ID>(ArbitraryCC); 1056 return false; 1057 } 1058 break; 1059 } 1060 1061 Lex.Lex(); 1062 return false; 1063} 1064 1065/// ParseInstructionMetadata 1066/// ::= !dbg !42 (',' !dbg !57)* 1067bool LLParser:: 1068ParseInstructionMetadata(SmallVectorImpl<std::pair<unsigned, 1069 MDNode *> > &Result){ 1070 do { 1071 if (Lex.getKind() != lltok::MetadataVar) 1072 return TokError("expected metadata after comma"); 1073 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 Result.push_back(std::make_pair(MDK, Node)); 1084 1085 // If this is the end of the list, we're done. 1086 } while (EatIfPresent(lltok::comma)); 1087 return false; 1088} 1089 1090/// ParseOptionalAlignment 1091/// ::= /* empty */ 1092/// ::= 'align' 4 1093bool LLParser::ParseOptionalAlignment(unsigned &Alignment) { 1094 Alignment = 0; 1095 if (!EatIfPresent(lltok::kw_align)) 1096 return false; 1097 LocTy AlignLoc = Lex.getLoc(); 1098 if (ParseUInt32(Alignment)) return true; 1099 if (!isPowerOf2_32(Alignment)) 1100 return Error(AlignLoc, "alignment is not a power of two"); 1101 return false; 1102} 1103 1104/// ParseOptionalCommaAlign 1105/// ::= 1106/// ::= ',' align 4 1107/// 1108/// This returns with AteExtraComma set to true if it ate an excess comma at the 1109/// end. 1110bool LLParser::ParseOptionalCommaAlign(unsigned &Alignment, 1111 bool &AteExtraComma) { 1112 AteExtraComma = false; 1113 while (EatIfPresent(lltok::comma)) { 1114 // Metadata at the end is an early exit. 1115 if (Lex.getKind() == lltok::MetadataVar) { 1116 AteExtraComma = true; 1117 return false; 1118 } 1119 1120 if (Lex.getKind() == lltok::kw_align) { 1121 if (ParseOptionalAlignment(Alignment)) return true; 1122 } else 1123 return true; 1124 } 1125 1126 return false; 1127} 1128 1129 1130/// ParseIndexList - This parses the index list for an insert/extractvalue 1131/// instruction. This sets AteExtraComma in the case where we eat an extra 1132/// comma at the end of the line and find that it is followed by metadata. 1133/// Clients that don't allow metadata can call the version of this function that 1134/// only takes one argument. 1135/// 1136/// ParseIndexList 1137/// ::= (',' uint32)+ 1138/// 1139bool LLParser::ParseIndexList(SmallVectorImpl<unsigned> &Indices, 1140 bool &AteExtraComma) { 1141 AteExtraComma = false; 1142 1143 if (Lex.getKind() != lltok::comma) 1144 return TokError("expected ',' as start of index list"); 1145 1146 while (EatIfPresent(lltok::comma)) { 1147 if (Lex.getKind() == lltok::MetadataVar) { 1148 AteExtraComma = true; 1149 return false; 1150 } 1151 unsigned Idx; 1152 if (ParseUInt32(Idx)) return true; 1153 Indices.push_back(Idx); 1154 } 1155 1156 return false; 1157} 1158 1159//===----------------------------------------------------------------------===// 1160// Type Parsing. 1161//===----------------------------------------------------------------------===// 1162 1163/// ParseType - Parse and resolve a full type. 1164bool LLParser::ParseType(PATypeHolder &Result, bool AllowVoid) { 1165 LocTy TypeLoc = Lex.getLoc(); 1166 if (ParseTypeRec(Result)) return true; 1167 1168 // Verify no unresolved uprefs. 1169 if (!UpRefs.empty()) 1170 return Error(UpRefs.back().Loc, "invalid unresolved type up reference"); 1171 1172 if (!AllowVoid && Result.get()->isVoidTy()) 1173 return Error(TypeLoc, "void type only allowed for function results"); 1174 1175 return false; 1176} 1177 1178/// HandleUpRefs - Every time we finish a new layer of types, this function is 1179/// called. It loops through the UpRefs vector, which is a list of the 1180/// currently active types. For each type, if the up-reference is contained in 1181/// the newly completed type, we decrement the level count. When the level 1182/// count reaches zero, the up-referenced type is the type that is passed in: 1183/// thus we can complete the cycle. 1184/// 1185PATypeHolder LLParser::HandleUpRefs(const Type *ty) { 1186 // If Ty isn't abstract, or if there are no up-references in it, then there is 1187 // nothing to resolve here. 1188 if (!ty->isAbstract() || UpRefs.empty()) return ty; 1189 1190 PATypeHolder Ty(ty); 1191#if 0 1192 dbgs() << "Type '" << Ty->getDescription() 1193 << "' newly formed. Resolving upreferences.\n" 1194 << UpRefs.size() << " upreferences active!\n"; 1195#endif 1196 1197 // If we find any resolvable upreferences (i.e., those whose NestingLevel goes 1198 // to zero), we resolve them all together before we resolve them to Ty. At 1199 // the end of the loop, if there is anything to resolve to Ty, it will be in 1200 // this variable. 1201 OpaqueType *TypeToResolve = 0; 1202 1203 for (unsigned i = 0; i != UpRefs.size(); ++i) { 1204 // Determine if 'Ty' directly contains this up-references 'LastContainedTy'. 1205 bool ContainsType = 1206 std::find(Ty->subtype_begin(), Ty->subtype_end(), 1207 UpRefs[i].LastContainedTy) != Ty->subtype_end(); 1208 1209#if 0 1210 dbgs() << " UR#" << i << " - TypeContains(" << Ty->getDescription() << ", " 1211 << UpRefs[i].LastContainedTy->getDescription() << ") = " 1212 << (ContainsType ? "true" : "false") 1213 << " level=" << UpRefs[i].NestingLevel << "\n"; 1214#endif 1215 if (!ContainsType) 1216 continue; 1217 1218 // Decrement level of upreference 1219 unsigned Level = --UpRefs[i].NestingLevel; 1220 UpRefs[i].LastContainedTy = Ty; 1221 1222 // If the Up-reference has a non-zero level, it shouldn't be resolved yet. 1223 if (Level != 0) 1224 continue; 1225 1226#if 0 1227 dbgs() << " * Resolving upreference for " << UpRefs[i].UpRefTy << "\n"; 1228#endif 1229 if (!TypeToResolve) 1230 TypeToResolve = UpRefs[i].UpRefTy; 1231 else 1232 UpRefs[i].UpRefTy->refineAbstractTypeTo(TypeToResolve); 1233 UpRefs.erase(UpRefs.begin()+i); // Remove from upreference list. 1234 --i; // Do not skip the next element. 1235 } 1236 1237 if (TypeToResolve) 1238 TypeToResolve->refineAbstractTypeTo(Ty); 1239 1240 return Ty; 1241} 1242 1243 1244/// ParseTypeRec - The recursive function used to process the internal 1245/// implementation details of types. 1246bool LLParser::ParseTypeRec(PATypeHolder &Result) { 1247 switch (Lex.getKind()) { 1248 default: 1249 return TokError("expected type"); 1250 case lltok::Type: 1251 // TypeRec ::= 'float' | 'void' (etc) 1252 Result = Lex.getTyVal(); 1253 Lex.Lex(); 1254 break; 1255 case lltok::kw_opaque: 1256 // TypeRec ::= 'opaque' 1257 Result = OpaqueType::get(Context); 1258 Lex.Lex(); 1259 break; 1260 case lltok::lbrace: 1261 // TypeRec ::= '{' ... '}' 1262 if (ParseStructType(Result, false)) 1263 return true; 1264 break; 1265 case lltok::lsquare: 1266 // TypeRec ::= '[' ... ']' 1267 Lex.Lex(); // eat the lsquare. 1268 if (ParseArrayVectorType(Result, false)) 1269 return true; 1270 break; 1271 case lltok::less: // Either vector or packed struct. 1272 // TypeRec ::= '<' ... '>' 1273 Lex.Lex(); 1274 if (Lex.getKind() == lltok::lbrace) { 1275 if (ParseStructType(Result, true) || 1276 ParseToken(lltok::greater, "expected '>' at end of packed struct")) 1277 return true; 1278 } else if (ParseArrayVectorType(Result, true)) 1279 return true; 1280 break; 1281 case lltok::LocalVar: 1282 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0 1283 // TypeRec ::= %foo 1284 if (const Type *T = M->getTypeByName(Lex.getStrVal())) { 1285 Result = T; 1286 } else { 1287 Result = OpaqueType::get(Context); 1288 ForwardRefTypes.insert(std::make_pair(Lex.getStrVal(), 1289 std::make_pair(Result, 1290 Lex.getLoc()))); 1291 M->addTypeName(Lex.getStrVal(), Result.get()); 1292 } 1293 Lex.Lex(); 1294 break; 1295 1296 case lltok::LocalVarID: 1297 // TypeRec ::= %4 1298 if (Lex.getUIntVal() < NumberedTypes.size()) 1299 Result = NumberedTypes[Lex.getUIntVal()]; 1300 else { 1301 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 1302 I = ForwardRefTypeIDs.find(Lex.getUIntVal()); 1303 if (I != ForwardRefTypeIDs.end()) 1304 Result = I->second.first; 1305 else { 1306 Result = OpaqueType::get(Context); 1307 ForwardRefTypeIDs.insert(std::make_pair(Lex.getUIntVal(), 1308 std::make_pair(Result, 1309 Lex.getLoc()))); 1310 } 1311 } 1312 Lex.Lex(); 1313 break; 1314 case lltok::backslash: { 1315 // TypeRec ::= '\' 4 1316 Lex.Lex(); 1317 unsigned Val; 1318 if (ParseUInt32(Val)) return true; 1319 OpaqueType *OT = OpaqueType::get(Context); //Use temporary placeholder. 1320 UpRefs.push_back(UpRefRecord(Lex.getLoc(), Val, OT)); 1321 Result = OT; 1322 break; 1323 } 1324 } 1325 1326 // Parse the type suffixes. 1327 while (1) { 1328 switch (Lex.getKind()) { 1329 // End of type. 1330 default: return false; 1331 1332 // TypeRec ::= TypeRec '*' 1333 case lltok::star: 1334 if (Result.get()->isLabelTy()) 1335 return TokError("basic block pointers are invalid"); 1336 if (Result.get()->isVoidTy()) 1337 return TokError("pointers to void are invalid; use i8* instead"); 1338 if (!PointerType::isValidElementType(Result.get())) 1339 return TokError("pointer to this type is invalid"); 1340 Result = HandleUpRefs(PointerType::getUnqual(Result.get())); 1341 Lex.Lex(); 1342 break; 1343 1344 // TypeRec ::= TypeRec 'addrspace' '(' uint32 ')' '*' 1345 case lltok::kw_addrspace: { 1346 if (Result.get()->isLabelTy()) 1347 return TokError("basic block pointers are invalid"); 1348 if (Result.get()->isVoidTy()) 1349 return TokError("pointers to void are invalid; use i8* instead"); 1350 if (!PointerType::isValidElementType(Result.get())) 1351 return TokError("pointer to this type is invalid"); 1352 unsigned AddrSpace; 1353 if (ParseOptionalAddrSpace(AddrSpace) || 1354 ParseToken(lltok::star, "expected '*' in address space")) 1355 return true; 1356 1357 Result = HandleUpRefs(PointerType::get(Result.get(), AddrSpace)); 1358 break; 1359 } 1360 1361 /// Types '(' ArgTypeListI ')' OptFuncAttrs 1362 case lltok::lparen: 1363 if (ParseFunctionType(Result)) 1364 return true; 1365 break; 1366 } 1367 } 1368} 1369 1370/// ParseParameterList 1371/// ::= '(' ')' 1372/// ::= '(' Arg (',' Arg)* ')' 1373/// Arg 1374/// ::= Type OptionalAttributes Value OptionalAttributes 1375bool LLParser::ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList, 1376 PerFunctionState &PFS) { 1377 if (ParseToken(lltok::lparen, "expected '(' in call")) 1378 return true; 1379 1380 while (Lex.getKind() != lltok::rparen) { 1381 // If this isn't the first argument, we need a comma. 1382 if (!ArgList.empty() && 1383 ParseToken(lltok::comma, "expected ',' in argument list")) 1384 return true; 1385 1386 // Parse the argument. 1387 LocTy ArgLoc; 1388 PATypeHolder ArgTy(Type::getVoidTy(Context)); 1389 unsigned ArgAttrs1 = Attribute::None; 1390 unsigned ArgAttrs2 = Attribute::None; 1391 Value *V; 1392 if (ParseType(ArgTy, ArgLoc)) 1393 return true; 1394 1395 // Otherwise, handle normal operands. 1396 if (ParseOptionalAttrs(ArgAttrs1, 0) || 1397 ParseValue(ArgTy, V, PFS) || 1398 // FIXME: Should not allow attributes after the argument, remove this 1399 // in LLVM 3.0. 1400 ParseOptionalAttrs(ArgAttrs2, 3)) 1401 return true; 1402 ArgList.push_back(ParamInfo(ArgLoc, V, ArgAttrs1|ArgAttrs2)); 1403 } 1404 1405 Lex.Lex(); // Lex the ')'. 1406 return false; 1407} 1408 1409 1410 1411/// ParseArgumentList - Parse the argument list for a function type or function 1412/// prototype. If 'inType' is true then we are parsing a FunctionType. 1413/// ::= '(' ArgTypeListI ')' 1414/// ArgTypeListI 1415/// ::= /*empty*/ 1416/// ::= '...' 1417/// ::= ArgTypeList ',' '...' 1418/// ::= ArgType (',' ArgType)* 1419/// 1420bool LLParser::ParseArgumentList(std::vector<ArgInfo> &ArgList, 1421 bool &isVarArg, bool inType) { 1422 isVarArg = false; 1423 assert(Lex.getKind() == lltok::lparen); 1424 Lex.Lex(); // eat the (. 1425 1426 if (Lex.getKind() == lltok::rparen) { 1427 // empty 1428 } else if (Lex.getKind() == lltok::dotdotdot) { 1429 isVarArg = true; 1430 Lex.Lex(); 1431 } else { 1432 LocTy TypeLoc = Lex.getLoc(); 1433 PATypeHolder ArgTy(Type::getVoidTy(Context)); 1434 unsigned Attrs; 1435 std::string Name; 1436 1437 // If we're parsing a type, use ParseTypeRec, because we allow recursive 1438 // types (such as a function returning a pointer to itself). If parsing a 1439 // function prototype, we require fully resolved types. 1440 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1441 ParseOptionalAttrs(Attrs, 0)) return true; 1442 1443 if (ArgTy->isVoidTy()) 1444 return Error(TypeLoc, "argument can not have void type"); 1445 1446 if (Lex.getKind() == lltok::LocalVar || 1447 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1448 Name = Lex.getStrVal(); 1449 Lex.Lex(); 1450 } 1451 1452 if (!FunctionType::isValidArgumentType(ArgTy)) 1453 return Error(TypeLoc, "invalid type for function argument"); 1454 1455 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1456 1457 while (EatIfPresent(lltok::comma)) { 1458 // Handle ... at end of arg list. 1459 if (EatIfPresent(lltok::dotdotdot)) { 1460 isVarArg = true; 1461 break; 1462 } 1463 1464 // Otherwise must be an argument type. 1465 TypeLoc = Lex.getLoc(); 1466 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1467 ParseOptionalAttrs(Attrs, 0)) return true; 1468 1469 if (ArgTy->isVoidTy()) 1470 return Error(TypeLoc, "argument can not have void type"); 1471 1472 if (Lex.getKind() == lltok::LocalVar || 1473 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1474 Name = Lex.getStrVal(); 1475 Lex.Lex(); 1476 } else { 1477 Name = ""; 1478 } 1479 1480 if (!ArgTy->isFirstClassType() && !isa<OpaqueType>(ArgTy)) 1481 return Error(TypeLoc, "invalid type for function argument"); 1482 1483 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1484 } 1485 } 1486 1487 return ParseToken(lltok::rparen, "expected ')' at end of argument list"); 1488} 1489 1490/// ParseFunctionType 1491/// ::= Type ArgumentList OptionalAttrs 1492bool LLParser::ParseFunctionType(PATypeHolder &Result) { 1493 assert(Lex.getKind() == lltok::lparen); 1494 1495 if (!FunctionType::isValidReturnType(Result)) 1496 return TokError("invalid function return type"); 1497 1498 std::vector<ArgInfo> ArgList; 1499 bool isVarArg; 1500 unsigned Attrs; 1501 if (ParseArgumentList(ArgList, isVarArg, true) || 1502 // FIXME: Allow, but ignore attributes on function types! 1503 // FIXME: Remove in LLVM 3.0 1504 ParseOptionalAttrs(Attrs, 2)) 1505 return true; 1506 1507 // Reject names on the arguments lists. 1508 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 1509 if (!ArgList[i].Name.empty()) 1510 return Error(ArgList[i].Loc, "argument name invalid in function type"); 1511 if (!ArgList[i].Attrs != 0) { 1512 // Allow but ignore attributes on function types; this permits 1513 // auto-upgrade. 1514 // FIXME: REJECT ATTRIBUTES ON FUNCTION TYPES in LLVM 3.0 1515 } 1516 } 1517 1518 std::vector<const Type*> ArgListTy; 1519 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 1520 ArgListTy.push_back(ArgList[i].Type); 1521 1522 Result = HandleUpRefs(FunctionType::get(Result.get(), 1523 ArgListTy, isVarArg)); 1524 return false; 1525} 1526 1527/// ParseStructType: Handles packed and unpacked types. </> parsed elsewhere. 1528/// TypeRec 1529/// ::= '{' '}' 1530/// ::= '{' TypeRec (',' TypeRec)* '}' 1531/// ::= '<' '{' '}' '>' 1532/// ::= '<' '{' TypeRec (',' TypeRec)* '}' '>' 1533bool LLParser::ParseStructType(PATypeHolder &Result, bool Packed) { 1534 assert(Lex.getKind() == lltok::lbrace); 1535 Lex.Lex(); // Consume the '{' 1536 1537 if (EatIfPresent(lltok::rbrace)) { 1538 Result = StructType::get(Context, Packed); 1539 return false; 1540 } 1541 1542 std::vector<PATypeHolder> ParamsList; 1543 LocTy EltTyLoc = Lex.getLoc(); 1544 if (ParseTypeRec(Result)) return true; 1545 ParamsList.push_back(Result); 1546 1547 if (Result->isVoidTy()) 1548 return Error(EltTyLoc, "struct element can not have void type"); 1549 if (!StructType::isValidElementType(Result)) 1550 return Error(EltTyLoc, "invalid element type for struct"); 1551 1552 while (EatIfPresent(lltok::comma)) { 1553 EltTyLoc = Lex.getLoc(); 1554 if (ParseTypeRec(Result)) return true; 1555 1556 if (Result->isVoidTy()) 1557 return Error(EltTyLoc, "struct element can not have void type"); 1558 if (!StructType::isValidElementType(Result)) 1559 return Error(EltTyLoc, "invalid element type for struct"); 1560 1561 ParamsList.push_back(Result); 1562 } 1563 1564 if (ParseToken(lltok::rbrace, "expected '}' at end of struct")) 1565 return true; 1566 1567 std::vector<const Type*> ParamsListTy; 1568 for (unsigned i = 0, e = ParamsList.size(); i != e; ++i) 1569 ParamsListTy.push_back(ParamsList[i].get()); 1570 Result = HandleUpRefs(StructType::get(Context, ParamsListTy, Packed)); 1571 return false; 1572} 1573 1574/// ParseArrayVectorType - Parse an array or vector type, assuming the first 1575/// token has already been consumed. 1576/// TypeRec 1577/// ::= '[' APSINTVAL 'x' Types ']' 1578/// ::= '<' APSINTVAL 'x' Types '>' 1579bool LLParser::ParseArrayVectorType(PATypeHolder &Result, bool isVector) { 1580 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned() || 1581 Lex.getAPSIntVal().getBitWidth() > 64) 1582 return TokError("expected number in address space"); 1583 1584 LocTy SizeLoc = Lex.getLoc(); 1585 uint64_t Size = Lex.getAPSIntVal().getZExtValue(); 1586 Lex.Lex(); 1587 1588 if (ParseToken(lltok::kw_x, "expected 'x' after element count")) 1589 return true; 1590 1591 LocTy TypeLoc = Lex.getLoc(); 1592 PATypeHolder EltTy(Type::getVoidTy(Context)); 1593 if (ParseTypeRec(EltTy)) return true; 1594 1595 if (EltTy->isVoidTy()) 1596 return Error(TypeLoc, "array and vector element type cannot be void"); 1597 1598 if (ParseToken(isVector ? lltok::greater : lltok::rsquare, 1599 "expected end of sequential type")) 1600 return true; 1601 1602 if (isVector) { 1603 if (Size == 0) 1604 return Error(SizeLoc, "zero element vector is illegal"); 1605 if ((unsigned)Size != Size) 1606 return Error(SizeLoc, "size too large for vector"); 1607 if (!VectorType::isValidElementType(EltTy)) 1608 return Error(TypeLoc, "vector element type must be fp or integer"); 1609 Result = VectorType::get(EltTy, unsigned(Size)); 1610 } else { 1611 if (!ArrayType::isValidElementType(EltTy)) 1612 return Error(TypeLoc, "invalid array element type"); 1613 Result = HandleUpRefs(ArrayType::get(EltTy, Size)); 1614 } 1615 return false; 1616} 1617 1618//===----------------------------------------------------------------------===// 1619// Function Semantic Analysis. 1620//===----------------------------------------------------------------------===// 1621 1622LLParser::PerFunctionState::PerFunctionState(LLParser &p, Function &f, 1623 int functionNumber) 1624 : P(p), F(f), FunctionNumber(functionNumber) { 1625 1626 // Insert unnamed arguments into the NumberedVals list. 1627 for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 1628 AI != E; ++AI) 1629 if (!AI->hasName()) 1630 NumberedVals.push_back(AI); 1631} 1632 1633LLParser::PerFunctionState::~PerFunctionState() { 1634 // If there were any forward referenced non-basicblock values, delete them. 1635 for (std::map<std::string, std::pair<Value*, LocTy> >::iterator 1636 I = ForwardRefVals.begin(), E = ForwardRefVals.end(); I != E; ++I) 1637 if (!isa<BasicBlock>(I->second.first)) { 1638 I->second.first->replaceAllUsesWith( 1639 UndefValue::get(I->second.first->getType())); 1640 delete I->second.first; 1641 I->second.first = 0; 1642 } 1643 1644 for (std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1645 I = ForwardRefValIDs.begin(), E = ForwardRefValIDs.end(); I != E; ++I) 1646 if (!isa<BasicBlock>(I->second.first)) { 1647 I->second.first->replaceAllUsesWith( 1648 UndefValue::get(I->second.first->getType())); 1649 delete I->second.first; 1650 I->second.first = 0; 1651 } 1652} 1653 1654bool LLParser::PerFunctionState::FinishFunction() { 1655 // Check to see if someone took the address of labels in this block. 1656 if (!P.ForwardRefBlockAddresses.empty()) { 1657 ValID FunctionID; 1658 if (!F.getName().empty()) { 1659 FunctionID.Kind = ValID::t_GlobalName; 1660 FunctionID.StrVal = F.getName(); 1661 } else { 1662 FunctionID.Kind = ValID::t_GlobalID; 1663 FunctionID.UIntVal = FunctionNumber; 1664 } 1665 1666 std::map<ValID, std::vector<std::pair<ValID, GlobalValue*> > >::iterator 1667 FRBAI = P.ForwardRefBlockAddresses.find(FunctionID); 1668 if (FRBAI != P.ForwardRefBlockAddresses.end()) { 1669 // Resolve all these references. 1670 if (P.ResolveForwardRefBlockAddresses(&F, FRBAI->second, this)) 1671 return true; 1672 1673 P.ForwardRefBlockAddresses.erase(FRBAI); 1674 } 1675 } 1676 1677 if (!ForwardRefVals.empty()) 1678 return P.Error(ForwardRefVals.begin()->second.second, 1679 "use of undefined value '%" + ForwardRefVals.begin()->first + 1680 "'"); 1681 if (!ForwardRefValIDs.empty()) 1682 return P.Error(ForwardRefValIDs.begin()->second.second, 1683 "use of undefined value '%" + 1684 utostr(ForwardRefValIDs.begin()->first) + "'"); 1685 return false; 1686} 1687 1688 1689/// GetVal - Get a value with the specified name or ID, creating a 1690/// forward reference record if needed. This can return null if the value 1691/// exists but does not have the right type. 1692Value *LLParser::PerFunctionState::GetVal(const std::string &Name, 1693 const Type *Ty, LocTy Loc) { 1694 // Look this name up in the normal function symbol table. 1695 Value *Val = F.getValueSymbolTable().lookup(Name); 1696 1697 // If this is a forward reference for the value, see if we already created a 1698 // forward ref record. 1699 if (Val == 0) { 1700 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1701 I = ForwardRefVals.find(Name); 1702 if (I != ForwardRefVals.end()) 1703 Val = I->second.first; 1704 } 1705 1706 // If we have the value in the symbol table or fwd-ref table, return it. 1707 if (Val) { 1708 if (Val->getType() == Ty) return Val; 1709 if (Ty->isLabelTy()) 1710 P.Error(Loc, "'%" + Name + "' is not a basic block"); 1711 else 1712 P.Error(Loc, "'%" + Name + "' defined with type '" + 1713 Val->getType()->getDescription() + "'"); 1714 return 0; 1715 } 1716 1717 // Don't make placeholders with invalid type. 1718 if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty) && 1719 Ty != Type::getLabelTy(F.getContext())) { 1720 P.Error(Loc, "invalid use of a non-first-class type"); 1721 return 0; 1722 } 1723 1724 // Otherwise, create a new forward reference for this value and remember it. 1725 Value *FwdVal; 1726 if (Ty->isLabelTy()) 1727 FwdVal = BasicBlock::Create(F.getContext(), Name, &F); 1728 else 1729 FwdVal = new Argument(Ty, Name); 1730 1731 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 1732 return FwdVal; 1733} 1734 1735Value *LLParser::PerFunctionState::GetVal(unsigned ID, const Type *Ty, 1736 LocTy Loc) { 1737 // Look this name up in the normal function symbol table. 1738 Value *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 1739 1740 // If this is a forward reference for the value, see if we already created a 1741 // forward ref record. 1742 if (Val == 0) { 1743 std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1744 I = ForwardRefValIDs.find(ID); 1745 if (I != ForwardRefValIDs.end()) 1746 Val = I->second.first; 1747 } 1748 1749 // If we have the value in the symbol table or fwd-ref table, return it. 1750 if (Val) { 1751 if (Val->getType() == Ty) return Val; 1752 if (Ty->isLabelTy()) 1753 P.Error(Loc, "'%" + utostr(ID) + "' is not a basic block"); 1754 else 1755 P.Error(Loc, "'%" + utostr(ID) + "' defined with type '" + 1756 Val->getType()->getDescription() + "'"); 1757 return 0; 1758 } 1759 1760 if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty) && 1761 Ty != Type::getLabelTy(F.getContext())) { 1762 P.Error(Loc, "invalid use of a non-first-class type"); 1763 return 0; 1764 } 1765 1766 // Otherwise, create a new forward reference for this value and remember it. 1767 Value *FwdVal; 1768 if (Ty->isLabelTy()) 1769 FwdVal = BasicBlock::Create(F.getContext(), "", &F); 1770 else 1771 FwdVal = new Argument(Ty); 1772 1773 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 1774 return FwdVal; 1775} 1776 1777/// SetInstName - After an instruction is parsed and inserted into its 1778/// basic block, this installs its name. 1779bool LLParser::PerFunctionState::SetInstName(int NameID, 1780 const std::string &NameStr, 1781 LocTy NameLoc, Instruction *Inst) { 1782 // If this instruction has void type, it cannot have a name or ID specified. 1783 if (Inst->getType()->isVoidTy()) { 1784 if (NameID != -1 || !NameStr.empty()) 1785 return P.Error(NameLoc, "instructions returning void cannot have a name"); 1786 return false; 1787 } 1788 1789 // If this was a numbered instruction, verify that the instruction is the 1790 // expected value and resolve any forward references. 1791 if (NameStr.empty()) { 1792 // If neither a name nor an ID was specified, just use the next ID. 1793 if (NameID == -1) 1794 NameID = NumberedVals.size(); 1795 1796 if (unsigned(NameID) != NumberedVals.size()) 1797 return P.Error(NameLoc, "instruction expected to be numbered '%" + 1798 utostr(NumberedVals.size()) + "'"); 1799 1800 std::map<unsigned, std::pair<Value*, LocTy> >::iterator FI = 1801 ForwardRefValIDs.find(NameID); 1802 if (FI != ForwardRefValIDs.end()) { 1803 if (FI->second.first->getType() != Inst->getType()) 1804 return P.Error(NameLoc, "instruction forward referenced with type '" + 1805 FI->second.first->getType()->getDescription() + "'"); 1806 FI->second.first->replaceAllUsesWith(Inst); 1807 delete FI->second.first; 1808 ForwardRefValIDs.erase(FI); 1809 } 1810 1811 NumberedVals.push_back(Inst); 1812 return false; 1813 } 1814 1815 // Otherwise, the instruction had a name. Resolve forward refs and set it. 1816 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1817 FI = ForwardRefVals.find(NameStr); 1818 if (FI != ForwardRefVals.end()) { 1819 if (FI->second.first->getType() != Inst->getType()) 1820 return P.Error(NameLoc, "instruction forward referenced with type '" + 1821 FI->second.first->getType()->getDescription() + "'"); 1822 FI->second.first->replaceAllUsesWith(Inst); 1823 delete FI->second.first; 1824 ForwardRefVals.erase(FI); 1825 } 1826 1827 // Set the name on the instruction. 1828 Inst->setName(NameStr); 1829 1830 if (Inst->getNameStr() != NameStr) 1831 return P.Error(NameLoc, "multiple definition of local value named '" + 1832 NameStr + "'"); 1833 return false; 1834} 1835 1836/// GetBB - Get a basic block with the specified name or ID, creating a 1837/// forward reference record if needed. 1838BasicBlock *LLParser::PerFunctionState::GetBB(const std::string &Name, 1839 LocTy Loc) { 1840 return cast_or_null<BasicBlock>(GetVal(Name, 1841 Type::getLabelTy(F.getContext()), Loc)); 1842} 1843 1844BasicBlock *LLParser::PerFunctionState::GetBB(unsigned ID, LocTy Loc) { 1845 return cast_or_null<BasicBlock>(GetVal(ID, 1846 Type::getLabelTy(F.getContext()), Loc)); 1847} 1848 1849/// DefineBB - Define the specified basic block, which is either named or 1850/// unnamed. If there is an error, this returns null otherwise it returns 1851/// the block being defined. 1852BasicBlock *LLParser::PerFunctionState::DefineBB(const std::string &Name, 1853 LocTy Loc) { 1854 BasicBlock *BB; 1855 if (Name.empty()) 1856 BB = GetBB(NumberedVals.size(), Loc); 1857 else 1858 BB = GetBB(Name, Loc); 1859 if (BB == 0) return 0; // Already diagnosed error. 1860 1861 // Move the block to the end of the function. Forward ref'd blocks are 1862 // inserted wherever they happen to be referenced. 1863 F.getBasicBlockList().splice(F.end(), F.getBasicBlockList(), BB); 1864 1865 // Remove the block from forward ref sets. 1866 if (Name.empty()) { 1867 ForwardRefValIDs.erase(NumberedVals.size()); 1868 NumberedVals.push_back(BB); 1869 } else { 1870 // BB forward references are already in the function symbol table. 1871 ForwardRefVals.erase(Name); 1872 } 1873 1874 return BB; 1875} 1876 1877//===----------------------------------------------------------------------===// 1878// Constants. 1879//===----------------------------------------------------------------------===// 1880 1881/// ParseValID - Parse an abstract value that doesn't necessarily have a 1882/// type implied. For example, if we parse "4" we don't know what integer type 1883/// it has. The value will later be combined with its type and checked for 1884/// sanity. 1885bool LLParser::ParseValID(ValID &ID) { 1886 ID.Loc = Lex.getLoc(); 1887 switch (Lex.getKind()) { 1888 default: return TokError("expected value token"); 1889 case lltok::GlobalID: // @42 1890 ID.UIntVal = Lex.getUIntVal(); 1891 ID.Kind = ValID::t_GlobalID; 1892 break; 1893 case lltok::GlobalVar: // @foo 1894 ID.StrVal = Lex.getStrVal(); 1895 ID.Kind = ValID::t_GlobalName; 1896 break; 1897 case lltok::LocalVarID: // %42 1898 ID.UIntVal = Lex.getUIntVal(); 1899 ID.Kind = ValID::t_LocalID; 1900 break; 1901 case lltok::LocalVar: // %foo 1902 case lltok::StringConstant: // "foo" - FIXME: REMOVE IN LLVM 3.0 1903 ID.StrVal = Lex.getStrVal(); 1904 ID.Kind = ValID::t_LocalName; 1905 break; 1906 case lltok::exclaim: // !{...} MDNode, !"foo" MDString 1907 Lex.Lex(); 1908 1909 if (EatIfPresent(lltok::lbrace)) { 1910 SmallVector<Value*, 16> Elts; 1911 if (ParseMDNodeVector(Elts) || 1912 ParseToken(lltok::rbrace, "expected end of metadata node")) 1913 return true; 1914 1915 ID.MDNodeVal = MDNode::get(Context, Elts.data(), Elts.size()); 1916 ID.Kind = ValID::t_MDNode; 1917 return false; 1918 } 1919 1920 // Standalone metadata reference 1921 // !{ ..., !42, ... } 1922 if (Lex.getKind() == lltok::APSInt) { 1923 if (ParseMDNodeID(ID.MDNodeVal)) return true; 1924 ID.Kind = ValID::t_MDNode; 1925 return false; 1926 } 1927 1928 // MDString: 1929 // ::= '!' STRINGCONSTANT 1930 if (ParseMDString(ID.MDStringVal)) return true; 1931 ID.Kind = ValID::t_MDString; 1932 return false; 1933 case lltok::APSInt: 1934 ID.APSIntVal = Lex.getAPSIntVal(); 1935 ID.Kind = ValID::t_APSInt; 1936 break; 1937 case lltok::APFloat: 1938 ID.APFloatVal = Lex.getAPFloatVal(); 1939 ID.Kind = ValID::t_APFloat; 1940 break; 1941 case lltok::kw_true: 1942 ID.ConstantVal = ConstantInt::getTrue(Context); 1943 ID.Kind = ValID::t_Constant; 1944 break; 1945 case lltok::kw_false: 1946 ID.ConstantVal = ConstantInt::getFalse(Context); 1947 ID.Kind = ValID::t_Constant; 1948 break; 1949 case lltok::kw_null: ID.Kind = ValID::t_Null; break; 1950 case lltok::kw_undef: ID.Kind = ValID::t_Undef; break; 1951 case lltok::kw_zeroinitializer: ID.Kind = ValID::t_Zero; break; 1952 1953 case lltok::lbrace: { 1954 // ValID ::= '{' ConstVector '}' 1955 Lex.Lex(); 1956 SmallVector<Constant*, 16> Elts; 1957 if (ParseGlobalValueVector(Elts) || 1958 ParseToken(lltok::rbrace, "expected end of struct constant")) 1959 return true; 1960 1961 ID.ConstantVal = ConstantStruct::get(Context, Elts.data(), 1962 Elts.size(), false); 1963 ID.Kind = ValID::t_Constant; 1964 return false; 1965 } 1966 case lltok::less: { 1967 // ValID ::= '<' ConstVector '>' --> Vector. 1968 // ValID ::= '<' '{' ConstVector '}' '>' --> Packed Struct. 1969 Lex.Lex(); 1970 bool isPackedStruct = EatIfPresent(lltok::lbrace); 1971 1972 SmallVector<Constant*, 16> Elts; 1973 LocTy FirstEltLoc = Lex.getLoc(); 1974 if (ParseGlobalValueVector(Elts) || 1975 (isPackedStruct && 1976 ParseToken(lltok::rbrace, "expected end of packed struct")) || 1977 ParseToken(lltok::greater, "expected end of constant")) 1978 return true; 1979 1980 if (isPackedStruct) { 1981 ID.ConstantVal = 1982 ConstantStruct::get(Context, Elts.data(), Elts.size(), true); 1983 ID.Kind = ValID::t_Constant; 1984 return false; 1985 } 1986 1987 if (Elts.empty()) 1988 return Error(ID.Loc, "constant vector must not be empty"); 1989 1990 if (!Elts[0]->getType()->isInteger() && 1991 !Elts[0]->getType()->isFloatingPoint()) 1992 return Error(FirstEltLoc, 1993 "vector elements must have integer or floating point type"); 1994 1995 // Verify that all the vector elements have the same type. 1996 for (unsigned i = 1, e = Elts.size(); i != e; ++i) 1997 if (Elts[i]->getType() != Elts[0]->getType()) 1998 return Error(FirstEltLoc, 1999 "vector element #" + utostr(i) + 2000 " is not of type '" + Elts[0]->getType()->getDescription()); 2001 2002 ID.ConstantVal = ConstantVector::get(Elts.data(), Elts.size()); 2003 ID.Kind = ValID::t_Constant; 2004 return false; 2005 } 2006 case lltok::lsquare: { // Array Constant 2007 Lex.Lex(); 2008 SmallVector<Constant*, 16> Elts; 2009 LocTy FirstEltLoc = Lex.getLoc(); 2010 if (ParseGlobalValueVector(Elts) || 2011 ParseToken(lltok::rsquare, "expected end of array constant")) 2012 return true; 2013 2014 // Handle empty element. 2015 if (Elts.empty()) { 2016 // Use undef instead of an array because it's inconvenient to determine 2017 // the element type at this point, there being no elements to examine. 2018 ID.Kind = ValID::t_EmptyArray; 2019 return false; 2020 } 2021 2022 if (!Elts[0]->getType()->isFirstClassType()) 2023 return Error(FirstEltLoc, "invalid array element type: " + 2024 Elts[0]->getType()->getDescription()); 2025 2026 ArrayType *ATy = ArrayType::get(Elts[0]->getType(), Elts.size()); 2027 2028 // Verify all elements are correct type! 2029 for (unsigned i = 0, e = Elts.size(); i != e; ++i) { 2030 if (Elts[i]->getType() != Elts[0]->getType()) 2031 return Error(FirstEltLoc, 2032 "array element #" + utostr(i) + 2033 " is not of type '" +Elts[0]->getType()->getDescription()); 2034 } 2035 2036 ID.ConstantVal = ConstantArray::get(ATy, Elts.data(), Elts.size()); 2037 ID.Kind = ValID::t_Constant; 2038 return false; 2039 } 2040 case lltok::kw_c: // c "foo" 2041 Lex.Lex(); 2042 ID.ConstantVal = ConstantArray::get(Context, Lex.getStrVal(), false); 2043 if (ParseToken(lltok::StringConstant, "expected string")) return true; 2044 ID.Kind = ValID::t_Constant; 2045 return false; 2046 2047 case lltok::kw_asm: { 2048 // ValID ::= 'asm' SideEffect? AlignStack? STRINGCONSTANT ',' STRINGCONSTANT 2049 bool HasSideEffect, AlignStack; 2050 Lex.Lex(); 2051 if (ParseOptionalToken(lltok::kw_sideeffect, HasSideEffect) || 2052 ParseOptionalToken(lltok::kw_alignstack, AlignStack) || 2053 ParseStringConstant(ID.StrVal) || 2054 ParseToken(lltok::comma, "expected comma in inline asm expression") || 2055 ParseToken(lltok::StringConstant, "expected constraint string")) 2056 return true; 2057 ID.StrVal2 = Lex.getStrVal(); 2058 ID.UIntVal = unsigned(HasSideEffect) | (unsigned(AlignStack)<<1); 2059 ID.Kind = ValID::t_InlineAsm; 2060 return false; 2061 } 2062 2063 case lltok::kw_blockaddress: { 2064 // ValID ::= 'blockaddress' '(' @foo ',' %bar ')' 2065 Lex.Lex(); 2066 2067 ValID Fn, Label; 2068 LocTy FnLoc, LabelLoc; 2069 2070 if (ParseToken(lltok::lparen, "expected '(' in block address expression") || 2071 ParseValID(Fn) || 2072 ParseToken(lltok::comma, "expected comma in block address expression")|| 2073 ParseValID(Label) || 2074 ParseToken(lltok::rparen, "expected ')' in block address expression")) 2075 return true; 2076 2077 if (Fn.Kind != ValID::t_GlobalID && Fn.Kind != ValID::t_GlobalName) 2078 return Error(Fn.Loc, "expected function name in blockaddress"); 2079 if (Label.Kind != ValID::t_LocalID && Label.Kind != ValID::t_LocalName) 2080 return Error(Label.Loc, "expected basic block name in blockaddress"); 2081 2082 // Make a global variable as a placeholder for this reference. 2083 GlobalVariable *FwdRef = new GlobalVariable(*M, Type::getInt8Ty(Context), 2084 false, GlobalValue::InternalLinkage, 2085 0, ""); 2086 ForwardRefBlockAddresses[Fn].push_back(std::make_pair(Label, FwdRef)); 2087 ID.ConstantVal = FwdRef; 2088 ID.Kind = ValID::t_Constant; 2089 return false; 2090 } 2091 2092 case lltok::kw_trunc: 2093 case lltok::kw_zext: 2094 case lltok::kw_sext: 2095 case lltok::kw_fptrunc: 2096 case lltok::kw_fpext: 2097 case lltok::kw_bitcast: 2098 case lltok::kw_uitofp: 2099 case lltok::kw_sitofp: 2100 case lltok::kw_fptoui: 2101 case lltok::kw_fptosi: 2102 case lltok::kw_inttoptr: 2103 case lltok::kw_ptrtoint: { 2104 unsigned Opc = Lex.getUIntVal(); 2105 PATypeHolder DestTy(Type::getVoidTy(Context)); 2106 Constant *SrcVal; 2107 Lex.Lex(); 2108 if (ParseToken(lltok::lparen, "expected '(' after constantexpr cast") || 2109 ParseGlobalTypeAndValue(SrcVal) || 2110 ParseToken(lltok::kw_to, "expected 'to' in constantexpr cast") || 2111 ParseType(DestTy) || 2112 ParseToken(lltok::rparen, "expected ')' at end of constantexpr cast")) 2113 return true; 2114 if (!CastInst::castIsValid((Instruction::CastOps)Opc, SrcVal, DestTy)) 2115 return Error(ID.Loc, "invalid cast opcode for cast from '" + 2116 SrcVal->getType()->getDescription() + "' to '" + 2117 DestTy->getDescription() + "'"); 2118 ID.ConstantVal = ConstantExpr::getCast((Instruction::CastOps)Opc, 2119 SrcVal, DestTy); 2120 ID.Kind = ValID::t_Constant; 2121 return false; 2122 } 2123 case lltok::kw_extractvalue: { 2124 Lex.Lex(); 2125 Constant *Val; 2126 SmallVector<unsigned, 4> Indices; 2127 if (ParseToken(lltok::lparen, "expected '(' in extractvalue constantexpr")|| 2128 ParseGlobalTypeAndValue(Val) || 2129 ParseIndexList(Indices) || 2130 ParseToken(lltok::rparen, "expected ')' in extractvalue constantexpr")) 2131 return true; 2132 2133 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 2134 return Error(ID.Loc, "extractvalue operand must be array or struct"); 2135 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 2136 Indices.end())) 2137 return Error(ID.Loc, "invalid indices for extractvalue"); 2138 ID.ConstantVal = 2139 ConstantExpr::getExtractValue(Val, Indices.data(), Indices.size()); 2140 ID.Kind = ValID::t_Constant; 2141 return false; 2142 } 2143 case lltok::kw_insertvalue: { 2144 Lex.Lex(); 2145 Constant *Val0, *Val1; 2146 SmallVector<unsigned, 4> Indices; 2147 if (ParseToken(lltok::lparen, "expected '(' in insertvalue constantexpr")|| 2148 ParseGlobalTypeAndValue(Val0) || 2149 ParseToken(lltok::comma, "expected comma in insertvalue constantexpr")|| 2150 ParseGlobalTypeAndValue(Val1) || 2151 ParseIndexList(Indices) || 2152 ParseToken(lltok::rparen, "expected ')' in insertvalue constantexpr")) 2153 return true; 2154 if (!isa<StructType>(Val0->getType()) && !isa<ArrayType>(Val0->getType())) 2155 return Error(ID.Loc, "extractvalue operand must be array or struct"); 2156 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 2157 Indices.end())) 2158 return Error(ID.Loc, "invalid indices for insertvalue"); 2159 ID.ConstantVal = ConstantExpr::getInsertValue(Val0, Val1, 2160 Indices.data(), Indices.size()); 2161 ID.Kind = ValID::t_Constant; 2162 return false; 2163 } 2164 case lltok::kw_icmp: 2165 case lltok::kw_fcmp: { 2166 unsigned PredVal, Opc = Lex.getUIntVal(); 2167 Constant *Val0, *Val1; 2168 Lex.Lex(); 2169 if (ParseCmpPredicate(PredVal, Opc) || 2170 ParseToken(lltok::lparen, "expected '(' in compare constantexpr") || 2171 ParseGlobalTypeAndValue(Val0) || 2172 ParseToken(lltok::comma, "expected comma in compare constantexpr") || 2173 ParseGlobalTypeAndValue(Val1) || 2174 ParseToken(lltok::rparen, "expected ')' in compare constantexpr")) 2175 return true; 2176 2177 if (Val0->getType() != Val1->getType()) 2178 return Error(ID.Loc, "compare operands must have the same type"); 2179 2180 CmpInst::Predicate Pred = (CmpInst::Predicate)PredVal; 2181 2182 if (Opc == Instruction::FCmp) { 2183 if (!Val0->getType()->isFPOrFPVector()) 2184 return Error(ID.Loc, "fcmp requires floating point operands"); 2185 ID.ConstantVal = ConstantExpr::getFCmp(Pred, Val0, Val1); 2186 } else { 2187 assert(Opc == Instruction::ICmp && "Unexpected opcode for CmpInst!"); 2188 if (!Val0->getType()->isIntOrIntVector() && 2189 !isa<PointerType>(Val0->getType())) 2190 return Error(ID.Loc, "icmp requires pointer or integer operands"); 2191 ID.ConstantVal = ConstantExpr::getICmp(Pred, Val0, Val1); 2192 } 2193 ID.Kind = ValID::t_Constant; 2194 return false; 2195 } 2196 2197 // Binary Operators. 2198 case lltok::kw_add: 2199 case lltok::kw_fadd: 2200 case lltok::kw_sub: 2201 case lltok::kw_fsub: 2202 case lltok::kw_mul: 2203 case lltok::kw_fmul: 2204 case lltok::kw_udiv: 2205 case lltok::kw_sdiv: 2206 case lltok::kw_fdiv: 2207 case lltok::kw_urem: 2208 case lltok::kw_srem: 2209 case lltok::kw_frem: { 2210 bool NUW = false; 2211 bool NSW = false; 2212 bool Exact = false; 2213 unsigned Opc = Lex.getUIntVal(); 2214 Constant *Val0, *Val1; 2215 Lex.Lex(); 2216 LocTy ModifierLoc = Lex.getLoc(); 2217 if (Opc == Instruction::Add || 2218 Opc == Instruction::Sub || 2219 Opc == Instruction::Mul) { 2220 if (EatIfPresent(lltok::kw_nuw)) 2221 NUW = true; 2222 if (EatIfPresent(lltok::kw_nsw)) { 2223 NSW = true; 2224 if (EatIfPresent(lltok::kw_nuw)) 2225 NUW = true; 2226 } 2227 } else if (Opc == Instruction::SDiv) { 2228 if (EatIfPresent(lltok::kw_exact)) 2229 Exact = true; 2230 } 2231 if (ParseToken(lltok::lparen, "expected '(' in binary constantexpr") || 2232 ParseGlobalTypeAndValue(Val0) || 2233 ParseToken(lltok::comma, "expected comma in binary constantexpr") || 2234 ParseGlobalTypeAndValue(Val1) || 2235 ParseToken(lltok::rparen, "expected ')' in binary constantexpr")) 2236 return true; 2237 if (Val0->getType() != Val1->getType()) 2238 return Error(ID.Loc, "operands of constexpr must have same type"); 2239 if (!Val0->getType()->isIntOrIntVector()) { 2240 if (NUW) 2241 return Error(ModifierLoc, "nuw only applies to integer operations"); 2242 if (NSW) 2243 return Error(ModifierLoc, "nsw only applies to integer operations"); 2244 } 2245 // API compatibility: Accept either integer or floating-point types with 2246 // add, sub, and mul. 2247 if (!Val0->getType()->isIntOrIntVector() && 2248 !Val0->getType()->isFPOrFPVector()) 2249 return Error(ID.Loc,"constexpr requires integer, fp, or vector operands"); 2250 unsigned Flags = 0; 2251 if (NUW) Flags |= OverflowingBinaryOperator::NoUnsignedWrap; 2252 if (NSW) Flags |= OverflowingBinaryOperator::NoSignedWrap; 2253 if (Exact) Flags |= SDivOperator::IsExact; 2254 Constant *C = ConstantExpr::get(Opc, Val0, Val1, Flags); 2255 ID.ConstantVal = C; 2256 ID.Kind = ValID::t_Constant; 2257 return false; 2258 } 2259 2260 // Logical Operations 2261 case lltok::kw_shl: 2262 case lltok::kw_lshr: 2263 case lltok::kw_ashr: 2264 case lltok::kw_and: 2265 case lltok::kw_or: 2266 case lltok::kw_xor: { 2267 unsigned Opc = Lex.getUIntVal(); 2268 Constant *Val0, *Val1; 2269 Lex.Lex(); 2270 if (ParseToken(lltok::lparen, "expected '(' in logical constantexpr") || 2271 ParseGlobalTypeAndValue(Val0) || 2272 ParseToken(lltok::comma, "expected comma in logical constantexpr") || 2273 ParseGlobalTypeAndValue(Val1) || 2274 ParseToken(lltok::rparen, "expected ')' in logical constantexpr")) 2275 return true; 2276 if (Val0->getType() != Val1->getType()) 2277 return Error(ID.Loc, "operands of constexpr must have same type"); 2278 if (!Val0->getType()->isIntOrIntVector()) 2279 return Error(ID.Loc, 2280 "constexpr requires integer or integer vector operands"); 2281 ID.ConstantVal = ConstantExpr::get(Opc, Val0, Val1); 2282 ID.Kind = ValID::t_Constant; 2283 return false; 2284 } 2285 2286 case lltok::kw_getelementptr: 2287 case lltok::kw_shufflevector: 2288 case lltok::kw_insertelement: 2289 case lltok::kw_extractelement: 2290 case lltok::kw_select: { 2291 unsigned Opc = Lex.getUIntVal(); 2292 SmallVector<Constant*, 16> Elts; 2293 bool InBounds = false; 2294 Lex.Lex(); 2295 if (Opc == Instruction::GetElementPtr) 2296 InBounds = EatIfPresent(lltok::kw_inbounds); 2297 if (ParseToken(lltok::lparen, "expected '(' in constantexpr") || 2298 ParseGlobalValueVector(Elts) || 2299 ParseToken(lltok::rparen, "expected ')' in constantexpr")) 2300 return true; 2301 2302 if (Opc == Instruction::GetElementPtr) { 2303 if (Elts.size() == 0 || !isa<PointerType>(Elts[0]->getType())) 2304 return Error(ID.Loc, "getelementptr requires pointer operand"); 2305 2306 if (!GetElementPtrInst::getIndexedType(Elts[0]->getType(), 2307 (Value**)(Elts.data() + 1), 2308 Elts.size() - 1)) 2309 return Error(ID.Loc, "invalid indices for getelementptr"); 2310 ID.ConstantVal = InBounds ? 2311 ConstantExpr::getInBoundsGetElementPtr(Elts[0], 2312 Elts.data() + 1, 2313 Elts.size() - 1) : 2314 ConstantExpr::getGetElementPtr(Elts[0], 2315 Elts.data() + 1, Elts.size() - 1); 2316 } else if (Opc == Instruction::Select) { 2317 if (Elts.size() != 3) 2318 return Error(ID.Loc, "expected three operands to select"); 2319 if (const char *Reason = SelectInst::areInvalidOperands(Elts[0], Elts[1], 2320 Elts[2])) 2321 return Error(ID.Loc, Reason); 2322 ID.ConstantVal = ConstantExpr::getSelect(Elts[0], Elts[1], Elts[2]); 2323 } else if (Opc == Instruction::ShuffleVector) { 2324 if (Elts.size() != 3) 2325 return Error(ID.Loc, "expected three operands to shufflevector"); 2326 if (!ShuffleVectorInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2327 return Error(ID.Loc, "invalid operands to shufflevector"); 2328 ID.ConstantVal = 2329 ConstantExpr::getShuffleVector(Elts[0], Elts[1],Elts[2]); 2330 } else if (Opc == Instruction::ExtractElement) { 2331 if (Elts.size() != 2) 2332 return Error(ID.Loc, "expected two operands to extractelement"); 2333 if (!ExtractElementInst::isValidOperands(Elts[0], Elts[1])) 2334 return Error(ID.Loc, "invalid extractelement operands"); 2335 ID.ConstantVal = ConstantExpr::getExtractElement(Elts[0], Elts[1]); 2336 } else { 2337 assert(Opc == Instruction::InsertElement && "Unknown opcode"); 2338 if (Elts.size() != 3) 2339 return Error(ID.Loc, "expected three operands to insertelement"); 2340 if (!InsertElementInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2341 return Error(ID.Loc, "invalid insertelement operands"); 2342 ID.ConstantVal = 2343 ConstantExpr::getInsertElement(Elts[0], Elts[1],Elts[2]); 2344 } 2345 2346 ID.Kind = ValID::t_Constant; 2347 return false; 2348 } 2349 } 2350 2351 Lex.Lex(); 2352 return false; 2353} 2354 2355/// ParseGlobalValue - Parse a global value with the specified type. 2356bool LLParser::ParseGlobalValue(const Type *Ty, Constant *&V) { 2357 V = 0; 2358 ValID ID; 2359 return ParseValID(ID) || 2360 ConvertGlobalValIDToValue(Ty, ID, V); 2361} 2362 2363/// ConvertGlobalValIDToValue - Apply a type to a ValID to get a fully resolved 2364/// constant. 2365bool LLParser::ConvertGlobalValIDToValue(const Type *Ty, ValID &ID, 2366 Constant *&V) { 2367 if (isa<FunctionType>(Ty)) 2368 return Error(ID.Loc, "functions are not values, refer to them as pointers"); 2369 2370 switch (ID.Kind) { 2371 default: llvm_unreachable("Unknown ValID!"); 2372 case ValID::t_MDNode: 2373 case ValID::t_MDString: 2374 return Error(ID.Loc, "invalid use of metadata"); 2375 case ValID::t_LocalID: 2376 case ValID::t_LocalName: 2377 return Error(ID.Loc, "invalid use of function-local name"); 2378 case ValID::t_InlineAsm: 2379 return Error(ID.Loc, "inline asm can only be an operand of call/invoke"); 2380 case ValID::t_GlobalName: 2381 V = GetGlobalVal(ID.StrVal, Ty, ID.Loc); 2382 return V == 0; 2383 case ValID::t_GlobalID: 2384 V = GetGlobalVal(ID.UIntVal, Ty, ID.Loc); 2385 return V == 0; 2386 case ValID::t_APSInt: 2387 if (!isa<IntegerType>(Ty)) 2388 return Error(ID.Loc, "integer constant must have integer type"); 2389 ID.APSIntVal.extOrTrunc(Ty->getPrimitiveSizeInBits()); 2390 V = ConstantInt::get(Context, ID.APSIntVal); 2391 return false; 2392 case ValID::t_APFloat: 2393 if (!Ty->isFloatingPoint() || 2394 !ConstantFP::isValueValidForType(Ty, ID.APFloatVal)) 2395 return Error(ID.Loc, "floating point constant invalid for type"); 2396 2397 // The lexer has no type info, so builds all float and double FP constants 2398 // as double. Fix this here. Long double does not need this. 2399 if (&ID.APFloatVal.getSemantics() == &APFloat::IEEEdouble && 2400 Ty->isFloatTy()) { 2401 bool Ignored; 2402 ID.APFloatVal.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, 2403 &Ignored); 2404 } 2405 V = ConstantFP::get(Context, ID.APFloatVal); 2406 2407 if (V->getType() != Ty) 2408 return Error(ID.Loc, "floating point constant does not have type '" + 2409 Ty->getDescription() + "'"); 2410 2411 return false; 2412 case ValID::t_Null: 2413 if (!isa<PointerType>(Ty)) 2414 return Error(ID.Loc, "null must be a pointer type"); 2415 V = ConstantPointerNull::get(cast<PointerType>(Ty)); 2416 return false; 2417 case ValID::t_Undef: 2418 // FIXME: LabelTy should not be a first-class type. 2419 if ((!Ty->isFirstClassType() || Ty->isLabelTy()) && 2420 !isa<OpaqueType>(Ty)) 2421 return Error(ID.Loc, "invalid type for undef constant"); 2422 V = UndefValue::get(Ty); 2423 return false; 2424 case ValID::t_EmptyArray: 2425 if (!isa<ArrayType>(Ty) || cast<ArrayType>(Ty)->getNumElements() != 0) 2426 return Error(ID.Loc, "invalid empty array initializer"); 2427 V = UndefValue::get(Ty); 2428 return false; 2429 case ValID::t_Zero: 2430 // FIXME: LabelTy should not be a first-class type. 2431 if (!Ty->isFirstClassType() || Ty->isLabelTy()) 2432 return Error(ID.Loc, "invalid type for null constant"); 2433 V = Constant::getNullValue(Ty); 2434 return false; 2435 case ValID::t_Constant: 2436 if (ID.ConstantVal->getType() != Ty) 2437 return Error(ID.Loc, "constant expression type mismatch"); 2438 V = ID.ConstantVal; 2439 return false; 2440 } 2441} 2442 2443/// ConvertGlobalOrMetadataValIDToValue - Apply a type to a ValID to get a fully 2444/// resolved constant or metadata value. 2445bool LLParser::ConvertGlobalOrMetadataValIDToValue(const Type *Ty, ValID &ID, 2446 Value *&V) { 2447 switch (ID.Kind) { 2448 case ValID::t_MDNode: 2449 if (!Ty->isMetadataTy()) 2450 return Error(ID.Loc, "metadata value must have metadata type"); 2451 V = ID.MDNodeVal; 2452 return false; 2453 case ValID::t_MDString: 2454 if (!Ty->isMetadataTy()) 2455 return Error(ID.Loc, "metadata value must have metadata type"); 2456 V = ID.MDStringVal; 2457 return false; 2458 default: 2459 Constant *C; 2460 if (ConvertGlobalValIDToValue(Ty, ID, C)) return true; 2461 V = C; 2462 return false; 2463 } 2464} 2465 2466 2467bool LLParser::ParseGlobalTypeAndValue(Constant *&V) { 2468 PATypeHolder Type(Type::getVoidTy(Context)); 2469 return ParseType(Type) || 2470 ParseGlobalValue(Type, V); 2471} 2472 2473/// ParseGlobalValueVector 2474/// ::= /*empty*/ 2475/// ::= TypeAndValue (',' TypeAndValue)* 2476bool LLParser::ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts) { 2477 // Empty list. 2478 if (Lex.getKind() == lltok::rbrace || 2479 Lex.getKind() == lltok::rsquare || 2480 Lex.getKind() == lltok::greater || 2481 Lex.getKind() == lltok::rparen) 2482 return false; 2483 2484 Constant *C; 2485 if (ParseGlobalTypeAndValue(C)) return true; 2486 Elts.push_back(C); 2487 2488 while (EatIfPresent(lltok::comma)) { 2489 if (ParseGlobalTypeAndValue(C)) return true; 2490 Elts.push_back(C); 2491 } 2492 2493 return false; 2494} 2495 2496 2497//===----------------------------------------------------------------------===// 2498// Function Parsing. 2499//===----------------------------------------------------------------------===// 2500 2501bool LLParser::ConvertValIDToValue(const Type *Ty, ValID &ID, Value *&V, 2502 PerFunctionState &PFS) { 2503 switch (ID.Kind) { 2504 case ValID::t_LocalID: V = PFS.GetVal(ID.UIntVal, Ty, ID.Loc); break; 2505 case ValID::t_LocalName: V = PFS.GetVal(ID.StrVal, Ty, ID.Loc); break; 2506 case ValID::t_InlineAsm: { 2507 const PointerType *PTy = dyn_cast<PointerType>(Ty); 2508 const FunctionType *FTy = 2509 PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : 0; 2510 if (!FTy || !InlineAsm::Verify(FTy, ID.StrVal2)) 2511 return Error(ID.Loc, "invalid type for inline asm constraint string"); 2512 V = InlineAsm::get(FTy, ID.StrVal, ID.StrVal2, ID.UIntVal&1, ID.UIntVal>>1); 2513 return false; 2514 } 2515 default: 2516 return ConvertGlobalOrMetadataValIDToValue(Ty, ID, V); 2517 } 2518 2519 return V == 0; 2520} 2521 2522bool LLParser::ParseValue(const Type *Ty, Value *&V, PerFunctionState &PFS) { 2523 V = 0; 2524 ValID ID; 2525 return ParseValID(ID) || 2526 ConvertValIDToValue(Ty, ID, V, PFS); 2527} 2528 2529bool LLParser::ParseTypeAndValue(Value *&V, PerFunctionState &PFS) { 2530 PATypeHolder T(Type::getVoidTy(Context)); 2531 return ParseType(T) || 2532 ParseValue(T, V, PFS); 2533} 2534 2535bool LLParser::ParseTypeAndBasicBlock(BasicBlock *&BB, LocTy &Loc, 2536 PerFunctionState &PFS) { 2537 Value *V; 2538 Loc = Lex.getLoc(); 2539 if (ParseTypeAndValue(V, PFS)) return true; 2540 if (!isa<BasicBlock>(V)) 2541 return Error(Loc, "expected a basic block"); 2542 BB = cast<BasicBlock>(V); 2543 return false; 2544} 2545 2546 2547/// FunctionHeader 2548/// ::= OptionalLinkage OptionalVisibility OptionalCallingConv OptRetAttrs 2549/// Type GlobalName '(' ArgList ')' OptFuncAttrs OptSection 2550/// OptionalAlign OptGC 2551bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) { 2552 // Parse the linkage. 2553 LocTy LinkageLoc = Lex.getLoc(); 2554 unsigned Linkage; 2555 2556 unsigned Visibility, RetAttrs; 2557 CallingConv::ID CC; 2558 PATypeHolder RetType(Type::getVoidTy(Context)); 2559 LocTy RetTypeLoc = Lex.getLoc(); 2560 if (ParseOptionalLinkage(Linkage) || 2561 ParseOptionalVisibility(Visibility) || 2562 ParseOptionalCallingConv(CC) || 2563 ParseOptionalAttrs(RetAttrs, 1) || 2564 ParseType(RetType, RetTypeLoc, true /*void allowed*/)) 2565 return true; 2566 2567 // Verify that the linkage is ok. 2568 switch ((GlobalValue::LinkageTypes)Linkage) { 2569 case GlobalValue::ExternalLinkage: 2570 break; // always ok. 2571 case GlobalValue::DLLImportLinkage: 2572 case GlobalValue::ExternalWeakLinkage: 2573 if (isDefine) 2574 return Error(LinkageLoc, "invalid linkage for function definition"); 2575 break; 2576 case GlobalValue::PrivateLinkage: 2577 case GlobalValue::LinkerPrivateLinkage: 2578 case GlobalValue::InternalLinkage: 2579 case GlobalValue::AvailableExternallyLinkage: 2580 case GlobalValue::LinkOnceAnyLinkage: 2581 case GlobalValue::LinkOnceODRLinkage: 2582 case GlobalValue::WeakAnyLinkage: 2583 case GlobalValue::WeakODRLinkage: 2584 case GlobalValue::DLLExportLinkage: 2585 if (!isDefine) 2586 return Error(LinkageLoc, "invalid linkage for function declaration"); 2587 break; 2588 case GlobalValue::AppendingLinkage: 2589 case GlobalValue::GhostLinkage: 2590 case GlobalValue::CommonLinkage: 2591 return Error(LinkageLoc, "invalid function linkage type"); 2592 } 2593 2594 if (!FunctionType::isValidReturnType(RetType) || 2595 isa<OpaqueType>(RetType)) 2596 return Error(RetTypeLoc, "invalid function return type"); 2597 2598 LocTy NameLoc = Lex.getLoc(); 2599 2600 std::string FunctionName; 2601 if (Lex.getKind() == lltok::GlobalVar) { 2602 FunctionName = Lex.getStrVal(); 2603 } else if (Lex.getKind() == lltok::GlobalID) { // @42 is ok. 2604 unsigned NameID = Lex.getUIntVal(); 2605 2606 if (NameID != NumberedVals.size()) 2607 return TokError("function expected to be numbered '%" + 2608 utostr(NumberedVals.size()) + "'"); 2609 } else { 2610 return TokError("expected function name"); 2611 } 2612 2613 Lex.Lex(); 2614 2615 if (Lex.getKind() != lltok::lparen) 2616 return TokError("expected '(' in function argument list"); 2617 2618 std::vector<ArgInfo> ArgList; 2619 bool isVarArg; 2620 unsigned FuncAttrs; 2621 std::string Section; 2622 unsigned Alignment; 2623 std::string GC; 2624 2625 if (ParseArgumentList(ArgList, isVarArg, false) || 2626 ParseOptionalAttrs(FuncAttrs, 2) || 2627 (EatIfPresent(lltok::kw_section) && 2628 ParseStringConstant(Section)) || 2629 ParseOptionalAlignment(Alignment) || 2630 (EatIfPresent(lltok::kw_gc) && 2631 ParseStringConstant(GC))) 2632 return true; 2633 2634 // If the alignment was parsed as an attribute, move to the alignment field. 2635 if (FuncAttrs & Attribute::Alignment) { 2636 Alignment = Attribute::getAlignmentFromAttrs(FuncAttrs); 2637 FuncAttrs &= ~Attribute::Alignment; 2638 } 2639 2640 // Okay, if we got here, the function is syntactically valid. Convert types 2641 // and do semantic checks. 2642 std::vector<const Type*> ParamTypeList; 2643 SmallVector<AttributeWithIndex, 8> Attrs; 2644 // FIXME : In 3.0, stop accepting zext, sext and inreg as optional function 2645 // attributes. 2646 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 2647 if (FuncAttrs & ObsoleteFuncAttrs) { 2648 RetAttrs |= FuncAttrs & ObsoleteFuncAttrs; 2649 FuncAttrs &= ~ObsoleteFuncAttrs; 2650 } 2651 2652 if (RetAttrs != Attribute::None) 2653 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 2654 2655 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 2656 ParamTypeList.push_back(ArgList[i].Type); 2657 if (ArgList[i].Attrs != Attribute::None) 2658 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 2659 } 2660 2661 if (FuncAttrs != Attribute::None) 2662 Attrs.push_back(AttributeWithIndex::get(~0, FuncAttrs)); 2663 2664 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 2665 2666 if (PAL.paramHasAttr(1, Attribute::StructRet) && 2667 RetType != Type::getVoidTy(Context)) 2668 return Error(RetTypeLoc, "functions with 'sret' argument must return void"); 2669 2670 const FunctionType *FT = 2671 FunctionType::get(RetType, ParamTypeList, isVarArg); 2672 const PointerType *PFT = PointerType::getUnqual(FT); 2673 2674 Fn = 0; 2675 if (!FunctionName.empty()) { 2676 // If this was a definition of a forward reference, remove the definition 2677 // from the forward reference table and fill in the forward ref. 2678 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator FRVI = 2679 ForwardRefVals.find(FunctionName); 2680 if (FRVI != ForwardRefVals.end()) { 2681 Fn = M->getFunction(FunctionName); 2682 ForwardRefVals.erase(FRVI); 2683 } else if ((Fn = M->getFunction(FunctionName))) { 2684 // If this function already exists in the symbol table, then it is 2685 // multiply defined. We accept a few cases for old backwards compat. 2686 // FIXME: Remove this stuff for LLVM 3.0. 2687 if (Fn->getType() != PFT || Fn->getAttributes() != PAL || 2688 (!Fn->isDeclaration() && isDefine)) { 2689 // If the redefinition has different type or different attributes, 2690 // reject it. If both have bodies, reject it. 2691 return Error(NameLoc, "invalid redefinition of function '" + 2692 FunctionName + "'"); 2693 } else if (Fn->isDeclaration()) { 2694 // Make sure to strip off any argument names so we can't get conflicts. 2695 for (Function::arg_iterator AI = Fn->arg_begin(), AE = Fn->arg_end(); 2696 AI != AE; ++AI) 2697 AI->setName(""); 2698 } 2699 } else if (M->getNamedValue(FunctionName)) { 2700 return Error(NameLoc, "redefinition of function '@" + FunctionName + "'"); 2701 } 2702 2703 } else { 2704 // If this is a definition of a forward referenced function, make sure the 2705 // types agree. 2706 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator I 2707 = ForwardRefValIDs.find(NumberedVals.size()); 2708 if (I != ForwardRefValIDs.end()) { 2709 Fn = cast<Function>(I->second.first); 2710 if (Fn->getType() != PFT) 2711 return Error(NameLoc, "type of definition and forward reference of '@" + 2712 utostr(NumberedVals.size()) +"' disagree"); 2713 ForwardRefValIDs.erase(I); 2714 } 2715 } 2716 2717 if (Fn == 0) 2718 Fn = Function::Create(FT, GlobalValue::ExternalLinkage, FunctionName, M); 2719 else // Move the forward-reference to the correct spot in the module. 2720 M->getFunctionList().splice(M->end(), M->getFunctionList(), Fn); 2721 2722 if (FunctionName.empty()) 2723 NumberedVals.push_back(Fn); 2724 2725 Fn->setLinkage((GlobalValue::LinkageTypes)Linkage); 2726 Fn->setVisibility((GlobalValue::VisibilityTypes)Visibility); 2727 Fn->setCallingConv(CC); 2728 Fn->setAttributes(PAL); 2729 Fn->setAlignment(Alignment); 2730 Fn->setSection(Section); 2731 if (!GC.empty()) Fn->setGC(GC.c_str()); 2732 2733 // Add all of the arguments we parsed to the function. 2734 Function::arg_iterator ArgIt = Fn->arg_begin(); 2735 for (unsigned i = 0, e = ArgList.size(); i != e; ++i, ++ArgIt) { 2736 // If we run out of arguments in the Function prototype, exit early. 2737 // FIXME: REMOVE THIS IN LLVM 3.0, this is just for the mismatch case above. 2738 if (ArgIt == Fn->arg_end()) break; 2739 2740 // If the argument has a name, insert it into the argument symbol table. 2741 if (ArgList[i].Name.empty()) continue; 2742 2743 // Set the name, if it conflicted, it will be auto-renamed. 2744 ArgIt->setName(ArgList[i].Name); 2745 2746 if (ArgIt->getNameStr() != ArgList[i].Name) 2747 return Error(ArgList[i].Loc, "redefinition of argument '%" + 2748 ArgList[i].Name + "'"); 2749 } 2750 2751 return false; 2752} 2753 2754 2755/// ParseFunctionBody 2756/// ::= '{' BasicBlock+ '}' 2757/// ::= 'begin' BasicBlock+ 'end' // FIXME: remove in LLVM 3.0 2758/// 2759bool LLParser::ParseFunctionBody(Function &Fn) { 2760 if (Lex.getKind() != lltok::lbrace && Lex.getKind() != lltok::kw_begin) 2761 return TokError("expected '{' in function body"); 2762 Lex.Lex(); // eat the {. 2763 2764 int FunctionNumber = -1; 2765 if (!Fn.hasName()) FunctionNumber = NumberedVals.size()-1; 2766 2767 PerFunctionState PFS(*this, Fn, FunctionNumber); 2768 2769 while (Lex.getKind() != lltok::rbrace && Lex.getKind() != lltok::kw_end) 2770 if (ParseBasicBlock(PFS)) return true; 2771 2772 // Eat the }. 2773 Lex.Lex(); 2774 2775 // Verify function is ok. 2776 return PFS.FinishFunction(); 2777} 2778 2779/// ParseBasicBlock 2780/// ::= LabelStr? Instruction* 2781bool LLParser::ParseBasicBlock(PerFunctionState &PFS) { 2782 // If this basic block starts out with a name, remember it. 2783 std::string Name; 2784 LocTy NameLoc = Lex.getLoc(); 2785 if (Lex.getKind() == lltok::LabelStr) { 2786 Name = Lex.getStrVal(); 2787 Lex.Lex(); 2788 } 2789 2790 BasicBlock *BB = PFS.DefineBB(Name, NameLoc); 2791 if (BB == 0) return true; 2792 2793 std::string NameStr; 2794 2795 // Parse the instructions in this block until we get a terminator. 2796 Instruction *Inst; 2797 SmallVector<std::pair<unsigned, MDNode *>, 4> MetadataOnInst; 2798 do { 2799 // This instruction may have three possibilities for a name: a) none 2800 // specified, b) name specified "%foo =", c) number specified: "%4 =". 2801 LocTy NameLoc = Lex.getLoc(); 2802 int NameID = -1; 2803 NameStr = ""; 2804 2805 if (Lex.getKind() == lltok::LocalVarID) { 2806 NameID = Lex.getUIntVal(); 2807 Lex.Lex(); 2808 if (ParseToken(lltok::equal, "expected '=' after instruction id")) 2809 return true; 2810 } else if (Lex.getKind() == lltok::LocalVar || 2811 // FIXME: REMOVE IN LLVM 3.0 2812 Lex.getKind() == lltok::StringConstant) { 2813 NameStr = Lex.getStrVal(); 2814 Lex.Lex(); 2815 if (ParseToken(lltok::equal, "expected '=' after instruction name")) 2816 return true; 2817 } 2818 2819 switch (ParseInstruction(Inst, BB, PFS)) { 2820 default: assert(0 && "Unknown ParseInstruction result!"); 2821 case InstError: return true; 2822 case InstNormal: 2823 // With a normal result, we check to see if the instruction is followed by 2824 // a comma and metadata. 2825 if (EatIfPresent(lltok::comma)) 2826 if (ParseInstructionMetadata(MetadataOnInst)) 2827 return true; 2828 break; 2829 case InstExtraComma: 2830 // If the instruction parser ate an extra comma at the end of it, it 2831 // *must* be followed by metadata. 2832 if (ParseInstructionMetadata(MetadataOnInst)) 2833 return true; 2834 break; 2835 } 2836 2837 // Set metadata attached with this instruction. 2838 for (unsigned i = 0, e = MetadataOnInst.size(); i != e; ++i) 2839 Inst->setMetadata(MetadataOnInst[i].first, MetadataOnInst[i].second); 2840 MetadataOnInst.clear(); 2841 2842 BB->getInstList().push_back(Inst); 2843 2844 // Set the name on the instruction. 2845 if (PFS.SetInstName(NameID, NameStr, NameLoc, Inst)) return true; 2846 } while (!isa<TerminatorInst>(Inst)); 2847 2848 return false; 2849} 2850 2851//===----------------------------------------------------------------------===// 2852// Instruction Parsing. 2853//===----------------------------------------------------------------------===// 2854 2855/// ParseInstruction - Parse one of the many different instructions. 2856/// 2857int LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB, 2858 PerFunctionState &PFS) { 2859 lltok::Kind Token = Lex.getKind(); 2860 if (Token == lltok::Eof) 2861 return TokError("found end of file when expecting more instructions"); 2862 LocTy Loc = Lex.getLoc(); 2863 unsigned KeywordVal = Lex.getUIntVal(); 2864 Lex.Lex(); // Eat the keyword. 2865 2866 switch (Token) { 2867 default: return Error(Loc, "expected instruction opcode"); 2868 // Terminator Instructions. 2869 case lltok::kw_unwind: Inst = new UnwindInst(Context); return false; 2870 case lltok::kw_unreachable: Inst = new UnreachableInst(Context); return false; 2871 case lltok::kw_ret: return ParseRet(Inst, BB, PFS); 2872 case lltok::kw_br: return ParseBr(Inst, PFS); 2873 case lltok::kw_switch: return ParseSwitch(Inst, PFS); 2874 case lltok::kw_indirectbr: return ParseIndirectBr(Inst, PFS); 2875 case lltok::kw_invoke: return ParseInvoke(Inst, PFS); 2876 // Binary Operators. 2877 case lltok::kw_add: 2878 case lltok::kw_sub: 2879 case lltok::kw_mul: { 2880 bool NUW = false; 2881 bool NSW = false; 2882 LocTy ModifierLoc = Lex.getLoc(); 2883 if (EatIfPresent(lltok::kw_nuw)) 2884 NUW = true; 2885 if (EatIfPresent(lltok::kw_nsw)) { 2886 NSW = true; 2887 if (EatIfPresent(lltok::kw_nuw)) 2888 NUW = true; 2889 } 2890 // API compatibility: Accept either integer or floating-point types. 2891 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 0); 2892 if (!Result) { 2893 if (!Inst->getType()->isIntOrIntVector()) { 2894 if (NUW) 2895 return Error(ModifierLoc, "nuw only applies to integer operations"); 2896 if (NSW) 2897 return Error(ModifierLoc, "nsw only applies to integer operations"); 2898 } 2899 if (NUW) 2900 cast<BinaryOperator>(Inst)->setHasNoUnsignedWrap(true); 2901 if (NSW) 2902 cast<BinaryOperator>(Inst)->setHasNoSignedWrap(true); 2903 } 2904 return Result; 2905 } 2906 case lltok::kw_fadd: 2907 case lltok::kw_fsub: 2908 case lltok::kw_fmul: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2909 2910 case lltok::kw_sdiv: { 2911 bool Exact = false; 2912 if (EatIfPresent(lltok::kw_exact)) 2913 Exact = true; 2914 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 1); 2915 if (!Result) 2916 if (Exact) 2917 cast<BinaryOperator>(Inst)->setIsExact(true); 2918 return Result; 2919 } 2920 2921 case lltok::kw_udiv: 2922 case lltok::kw_urem: 2923 case lltok::kw_srem: return ParseArithmetic(Inst, PFS, KeywordVal, 1); 2924 case lltok::kw_fdiv: 2925 case lltok::kw_frem: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2926 case lltok::kw_shl: 2927 case lltok::kw_lshr: 2928 case lltok::kw_ashr: 2929 case lltok::kw_and: 2930 case lltok::kw_or: 2931 case lltok::kw_xor: return ParseLogical(Inst, PFS, KeywordVal); 2932 case lltok::kw_icmp: 2933 case lltok::kw_fcmp: return ParseCompare(Inst, PFS, KeywordVal); 2934 // Casts. 2935 case lltok::kw_trunc: 2936 case lltok::kw_zext: 2937 case lltok::kw_sext: 2938 case lltok::kw_fptrunc: 2939 case lltok::kw_fpext: 2940 case lltok::kw_bitcast: 2941 case lltok::kw_uitofp: 2942 case lltok::kw_sitofp: 2943 case lltok::kw_fptoui: 2944 case lltok::kw_fptosi: 2945 case lltok::kw_inttoptr: 2946 case lltok::kw_ptrtoint: return ParseCast(Inst, PFS, KeywordVal); 2947 // Other. 2948 case lltok::kw_select: return ParseSelect(Inst, PFS); 2949 case lltok::kw_va_arg: return ParseVA_Arg(Inst, PFS); 2950 case lltok::kw_extractelement: return ParseExtractElement(Inst, PFS); 2951 case lltok::kw_insertelement: return ParseInsertElement(Inst, PFS); 2952 case lltok::kw_shufflevector: return ParseShuffleVector(Inst, PFS); 2953 case lltok::kw_phi: return ParsePHI(Inst, PFS); 2954 case lltok::kw_call: return ParseCall(Inst, PFS, false); 2955 case lltok::kw_tail: return ParseCall(Inst, PFS, true); 2956 // Memory. 2957 case lltok::kw_alloca: return ParseAlloc(Inst, PFS); 2958 case lltok::kw_malloc: return ParseAlloc(Inst, PFS, BB, false); 2959 case lltok::kw_free: return ParseFree(Inst, PFS, BB); 2960 case lltok::kw_load: return ParseLoad(Inst, PFS, false); 2961 case lltok::kw_store: return ParseStore(Inst, PFS, false); 2962 case lltok::kw_volatile: 2963 if (EatIfPresent(lltok::kw_load)) 2964 return ParseLoad(Inst, PFS, true); 2965 else if (EatIfPresent(lltok::kw_store)) 2966 return ParseStore(Inst, PFS, true); 2967 else 2968 return TokError("expected 'load' or 'store'"); 2969 case lltok::kw_getresult: return ParseGetResult(Inst, PFS); 2970 case lltok::kw_getelementptr: return ParseGetElementPtr(Inst, PFS); 2971 case lltok::kw_extractvalue: return ParseExtractValue(Inst, PFS); 2972 case lltok::kw_insertvalue: return ParseInsertValue(Inst, PFS); 2973 } 2974} 2975 2976/// ParseCmpPredicate - Parse an integer or fp predicate, based on Kind. 2977bool LLParser::ParseCmpPredicate(unsigned &P, unsigned Opc) { 2978 if (Opc == Instruction::FCmp) { 2979 switch (Lex.getKind()) { 2980 default: TokError("expected fcmp predicate (e.g. 'oeq')"); 2981 case lltok::kw_oeq: P = CmpInst::FCMP_OEQ; break; 2982 case lltok::kw_one: P = CmpInst::FCMP_ONE; break; 2983 case lltok::kw_olt: P = CmpInst::FCMP_OLT; break; 2984 case lltok::kw_ogt: P = CmpInst::FCMP_OGT; break; 2985 case lltok::kw_ole: P = CmpInst::FCMP_OLE; break; 2986 case lltok::kw_oge: P = CmpInst::FCMP_OGE; break; 2987 case lltok::kw_ord: P = CmpInst::FCMP_ORD; break; 2988 case lltok::kw_uno: P = CmpInst::FCMP_UNO; break; 2989 case lltok::kw_ueq: P = CmpInst::FCMP_UEQ; break; 2990 case lltok::kw_une: P = CmpInst::FCMP_UNE; break; 2991 case lltok::kw_ult: P = CmpInst::FCMP_ULT; break; 2992 case lltok::kw_ugt: P = CmpInst::FCMP_UGT; break; 2993 case lltok::kw_ule: P = CmpInst::FCMP_ULE; break; 2994 case lltok::kw_uge: P = CmpInst::FCMP_UGE; break; 2995 case lltok::kw_true: P = CmpInst::FCMP_TRUE; break; 2996 case lltok::kw_false: P = CmpInst::FCMP_FALSE; break; 2997 } 2998 } else { 2999 switch (Lex.getKind()) { 3000 default: TokError("expected icmp predicate (e.g. 'eq')"); 3001 case lltok::kw_eq: P = CmpInst::ICMP_EQ; break; 3002 case lltok::kw_ne: P = CmpInst::ICMP_NE; break; 3003 case lltok::kw_slt: P = CmpInst::ICMP_SLT; break; 3004 case lltok::kw_sgt: P = CmpInst::ICMP_SGT; break; 3005 case lltok::kw_sle: P = CmpInst::ICMP_SLE; break; 3006 case lltok::kw_sge: P = CmpInst::ICMP_SGE; break; 3007 case lltok::kw_ult: P = CmpInst::ICMP_ULT; break; 3008 case lltok::kw_ugt: P = CmpInst::ICMP_UGT; break; 3009 case lltok::kw_ule: P = CmpInst::ICMP_ULE; break; 3010 case lltok::kw_uge: P = CmpInst::ICMP_UGE; break; 3011 } 3012 } 3013 Lex.Lex(); 3014 return false; 3015} 3016 3017//===----------------------------------------------------------------------===// 3018// Terminator Instructions. 3019//===----------------------------------------------------------------------===// 3020 3021/// ParseRet - Parse a return instruction. 3022/// ::= 'ret' void (',' !dbg, !1)* 3023/// ::= 'ret' TypeAndValue (',' !dbg, !1)* 3024/// ::= 'ret' TypeAndValue (',' TypeAndValue)+ (',' !dbg, !1)* 3025/// [[obsolete: LLVM 3.0]] 3026int LLParser::ParseRet(Instruction *&Inst, BasicBlock *BB, 3027 PerFunctionState &PFS) { 3028 PATypeHolder Ty(Type::getVoidTy(Context)); 3029 if (ParseType(Ty, true /*void allowed*/)) return true; 3030 3031 if (Ty->isVoidTy()) { 3032 Inst = ReturnInst::Create(Context); 3033 return false; 3034 } 3035 3036 Value *RV; 3037 if (ParseValue(Ty, RV, PFS)) return true; 3038 3039 bool ExtraComma = false; 3040 if (EatIfPresent(lltok::comma)) { 3041 // Parse optional custom metadata, e.g. !dbg 3042 if (Lex.getKind() == lltok::MetadataVar) { 3043 ExtraComma = true; 3044 } else { 3045 // The normal case is one return value. 3046 // FIXME: LLVM 3.0 remove MRV support for 'ret i32 1, i32 2', requiring 3047 // use of 'ret {i32,i32} {i32 1, i32 2}' 3048 SmallVector<Value*, 8> RVs; 3049 RVs.push_back(RV); 3050 3051 do { 3052 // If optional custom metadata, e.g. !dbg is seen then this is the 3053 // end of MRV. 3054 if (Lex.getKind() == lltok::MetadataVar) 3055 break; 3056 if (ParseTypeAndValue(RV, PFS)) return true; 3057 RVs.push_back(RV); 3058 } while (EatIfPresent(lltok::comma)); 3059 3060 RV = UndefValue::get(PFS.getFunction().getReturnType()); 3061 for (unsigned i = 0, e = RVs.size(); i != e; ++i) { 3062 Instruction *I = InsertValueInst::Create(RV, RVs[i], i, "mrv"); 3063 BB->getInstList().push_back(I); 3064 RV = I; 3065 } 3066 } 3067 } 3068 3069 Inst = ReturnInst::Create(Context, RV); 3070 return ExtraComma ? InstExtraComma : InstNormal; 3071} 3072 3073 3074/// ParseBr 3075/// ::= 'br' TypeAndValue 3076/// ::= 'br' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3077bool LLParser::ParseBr(Instruction *&Inst, PerFunctionState &PFS) { 3078 LocTy Loc, Loc2; 3079 Value *Op0; 3080 BasicBlock *Op1, *Op2; 3081 if (ParseTypeAndValue(Op0, Loc, PFS)) return true; 3082 3083 if (BasicBlock *BB = dyn_cast<BasicBlock>(Op0)) { 3084 Inst = BranchInst::Create(BB); 3085 return false; 3086 } 3087 3088 if (Op0->getType() != Type::getInt1Ty(Context)) 3089 return Error(Loc, "branch condition must have 'i1' type"); 3090 3091 if (ParseToken(lltok::comma, "expected ',' after branch condition") || 3092 ParseTypeAndBasicBlock(Op1, Loc, PFS) || 3093 ParseToken(lltok::comma, "expected ',' after true destination") || 3094 ParseTypeAndBasicBlock(Op2, Loc2, PFS)) 3095 return true; 3096 3097 Inst = BranchInst::Create(Op1, Op2, Op0); 3098 return false; 3099} 3100 3101/// ParseSwitch 3102/// Instruction 3103/// ::= 'switch' TypeAndValue ',' TypeAndValue '[' JumpTable ']' 3104/// JumpTable 3105/// ::= (TypeAndValue ',' TypeAndValue)* 3106bool LLParser::ParseSwitch(Instruction *&Inst, PerFunctionState &PFS) { 3107 LocTy CondLoc, BBLoc; 3108 Value *Cond; 3109 BasicBlock *DefaultBB; 3110 if (ParseTypeAndValue(Cond, CondLoc, PFS) || 3111 ParseToken(lltok::comma, "expected ',' after switch condition") || 3112 ParseTypeAndBasicBlock(DefaultBB, BBLoc, PFS) || 3113 ParseToken(lltok::lsquare, "expected '[' with switch table")) 3114 return true; 3115 3116 if (!isa<IntegerType>(Cond->getType())) 3117 return Error(CondLoc, "switch condition must have integer type"); 3118 3119 // Parse the jump table pairs. 3120 SmallPtrSet<Value*, 32> SeenCases; 3121 SmallVector<std::pair<ConstantInt*, BasicBlock*>, 32> Table; 3122 while (Lex.getKind() != lltok::rsquare) { 3123 Value *Constant; 3124 BasicBlock *DestBB; 3125 3126 if (ParseTypeAndValue(Constant, CondLoc, PFS) || 3127 ParseToken(lltok::comma, "expected ',' after case value") || 3128 ParseTypeAndBasicBlock(DestBB, PFS)) 3129 return true; 3130 3131 if (!SeenCases.insert(Constant)) 3132 return Error(CondLoc, "duplicate case value in switch"); 3133 if (!isa<ConstantInt>(Constant)) 3134 return Error(CondLoc, "case value is not a constant integer"); 3135 3136 Table.push_back(std::make_pair(cast<ConstantInt>(Constant), DestBB)); 3137 } 3138 3139 Lex.Lex(); // Eat the ']'. 3140 3141 SwitchInst *SI = SwitchInst::Create(Cond, DefaultBB, Table.size()); 3142 for (unsigned i = 0, e = Table.size(); i != e; ++i) 3143 SI->addCase(Table[i].first, Table[i].second); 3144 Inst = SI; 3145 return false; 3146} 3147 3148/// ParseIndirectBr 3149/// Instruction 3150/// ::= 'indirectbr' TypeAndValue ',' '[' LabelList ']' 3151bool LLParser::ParseIndirectBr(Instruction *&Inst, PerFunctionState &PFS) { 3152 LocTy AddrLoc; 3153 Value *Address; 3154 if (ParseTypeAndValue(Address, AddrLoc, PFS) || 3155 ParseToken(lltok::comma, "expected ',' after indirectbr address") || 3156 ParseToken(lltok::lsquare, "expected '[' with indirectbr")) 3157 return true; 3158 3159 if (!isa<PointerType>(Address->getType())) 3160 return Error(AddrLoc, "indirectbr address must have pointer type"); 3161 3162 // Parse the destination list. 3163 SmallVector<BasicBlock*, 16> DestList; 3164 3165 if (Lex.getKind() != lltok::rsquare) { 3166 BasicBlock *DestBB; 3167 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3168 return true; 3169 DestList.push_back(DestBB); 3170 3171 while (EatIfPresent(lltok::comma)) { 3172 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3173 return true; 3174 DestList.push_back(DestBB); 3175 } 3176 } 3177 3178 if (ParseToken(lltok::rsquare, "expected ']' at end of block list")) 3179 return true; 3180 3181 IndirectBrInst *IBI = IndirectBrInst::Create(Address, DestList.size()); 3182 for (unsigned i = 0, e = DestList.size(); i != e; ++i) 3183 IBI->addDestination(DestList[i]); 3184 Inst = IBI; 3185 return false; 3186} 3187 3188 3189/// ParseInvoke 3190/// ::= 'invoke' OptionalCallingConv OptionalAttrs Type Value ParamList 3191/// OptionalAttrs 'to' TypeAndValue 'unwind' TypeAndValue 3192bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) { 3193 LocTy CallLoc = Lex.getLoc(); 3194 unsigned RetAttrs, FnAttrs; 3195 CallingConv::ID CC; 3196 PATypeHolder RetType(Type::getVoidTy(Context)); 3197 LocTy RetTypeLoc; 3198 ValID CalleeID; 3199 SmallVector<ParamInfo, 16> ArgList; 3200 3201 BasicBlock *NormalBB, *UnwindBB; 3202 if (ParseOptionalCallingConv(CC) || 3203 ParseOptionalAttrs(RetAttrs, 1) || 3204 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3205 ParseValID(CalleeID) || 3206 ParseParameterList(ArgList, PFS) || 3207 ParseOptionalAttrs(FnAttrs, 2) || 3208 ParseToken(lltok::kw_to, "expected 'to' in invoke") || 3209 ParseTypeAndBasicBlock(NormalBB, PFS) || 3210 ParseToken(lltok::kw_unwind, "expected 'unwind' in invoke") || 3211 ParseTypeAndBasicBlock(UnwindBB, PFS)) 3212 return true; 3213 3214 // If RetType is a non-function pointer type, then this is the short syntax 3215 // for the call, which means that RetType is just the return type. Infer the 3216 // rest of the function argument types from the arguments that are present. 3217 const PointerType *PFTy = 0; 3218 const FunctionType *Ty = 0; 3219 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3220 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3221 // Pull out the types of all of the arguments... 3222 std::vector<const Type*> ParamTypes; 3223 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3224 ParamTypes.push_back(ArgList[i].V->getType()); 3225 3226 if (!FunctionType::isValidReturnType(RetType)) 3227 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3228 3229 Ty = FunctionType::get(RetType, ParamTypes, false); 3230 PFTy = PointerType::getUnqual(Ty); 3231 } 3232 3233 // Look up the callee. 3234 Value *Callee; 3235 if (ConvertValIDToValue(PFTy, CalleeID, Callee, PFS)) return true; 3236 3237 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 3238 // function attributes. 3239 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 3240 if (FnAttrs & ObsoleteFuncAttrs) { 3241 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 3242 FnAttrs &= ~ObsoleteFuncAttrs; 3243 } 3244 3245 // Set up the Attributes for the function. 3246 SmallVector<AttributeWithIndex, 8> Attrs; 3247 if (RetAttrs != Attribute::None) 3248 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3249 3250 SmallVector<Value*, 8> Args; 3251 3252 // Loop through FunctionType's arguments and ensure they are specified 3253 // correctly. Also, gather any parameter attributes. 3254 FunctionType::param_iterator I = Ty->param_begin(); 3255 FunctionType::param_iterator E = Ty->param_end(); 3256 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3257 const Type *ExpectedTy = 0; 3258 if (I != E) { 3259 ExpectedTy = *I++; 3260 } else if (!Ty->isVarArg()) { 3261 return Error(ArgList[i].Loc, "too many arguments specified"); 3262 } 3263 3264 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3265 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3266 ExpectedTy->getDescription() + "'"); 3267 Args.push_back(ArgList[i].V); 3268 if (ArgList[i].Attrs != Attribute::None) 3269 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3270 } 3271 3272 if (I != E) 3273 return Error(CallLoc, "not enough parameters specified for call"); 3274 3275 if (FnAttrs != Attribute::None) 3276 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3277 3278 // Finish off the Attributes and check them 3279 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3280 3281 InvokeInst *II = InvokeInst::Create(Callee, NormalBB, UnwindBB, 3282 Args.begin(), Args.end()); 3283 II->setCallingConv(CC); 3284 II->setAttributes(PAL); 3285 Inst = II; 3286 return false; 3287} 3288 3289 3290 3291//===----------------------------------------------------------------------===// 3292// Binary Operators. 3293//===----------------------------------------------------------------------===// 3294 3295/// ParseArithmetic 3296/// ::= ArithmeticOps TypeAndValue ',' Value 3297/// 3298/// If OperandType is 0, then any FP or integer operand is allowed. If it is 1, 3299/// then any integer operand is allowed, if it is 2, any fp operand is allowed. 3300bool LLParser::ParseArithmetic(Instruction *&Inst, PerFunctionState &PFS, 3301 unsigned Opc, unsigned OperandType) { 3302 LocTy Loc; Value *LHS, *RHS; 3303 if (ParseTypeAndValue(LHS, Loc, PFS) || 3304 ParseToken(lltok::comma, "expected ',' in arithmetic operation") || 3305 ParseValue(LHS->getType(), RHS, PFS)) 3306 return true; 3307 3308 bool Valid; 3309 switch (OperandType) { 3310 default: llvm_unreachable("Unknown operand type!"); 3311 case 0: // int or FP. 3312 Valid = LHS->getType()->isIntOrIntVector() || 3313 LHS->getType()->isFPOrFPVector(); 3314 break; 3315 case 1: Valid = LHS->getType()->isIntOrIntVector(); break; 3316 case 2: Valid = LHS->getType()->isFPOrFPVector(); break; 3317 } 3318 3319 if (!Valid) 3320 return Error(Loc, "invalid operand type for instruction"); 3321 3322 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3323 return false; 3324} 3325 3326/// ParseLogical 3327/// ::= ArithmeticOps TypeAndValue ',' Value { 3328bool LLParser::ParseLogical(Instruction *&Inst, PerFunctionState &PFS, 3329 unsigned Opc) { 3330 LocTy Loc; Value *LHS, *RHS; 3331 if (ParseTypeAndValue(LHS, Loc, PFS) || 3332 ParseToken(lltok::comma, "expected ',' in logical operation") || 3333 ParseValue(LHS->getType(), RHS, PFS)) 3334 return true; 3335 3336 if (!LHS->getType()->isIntOrIntVector()) 3337 return Error(Loc,"instruction requires integer or integer vector operands"); 3338 3339 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3340 return false; 3341} 3342 3343 3344/// ParseCompare 3345/// ::= 'icmp' IPredicates TypeAndValue ',' Value 3346/// ::= 'fcmp' FPredicates TypeAndValue ',' Value 3347bool LLParser::ParseCompare(Instruction *&Inst, PerFunctionState &PFS, 3348 unsigned Opc) { 3349 // Parse the integer/fp comparison predicate. 3350 LocTy Loc; 3351 unsigned Pred; 3352 Value *LHS, *RHS; 3353 if (ParseCmpPredicate(Pred, Opc) || 3354 ParseTypeAndValue(LHS, Loc, PFS) || 3355 ParseToken(lltok::comma, "expected ',' after compare value") || 3356 ParseValue(LHS->getType(), RHS, PFS)) 3357 return true; 3358 3359 if (Opc == Instruction::FCmp) { 3360 if (!LHS->getType()->isFPOrFPVector()) 3361 return Error(Loc, "fcmp requires floating point operands"); 3362 Inst = new FCmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3363 } else { 3364 assert(Opc == Instruction::ICmp && "Unknown opcode for CmpInst!"); 3365 if (!LHS->getType()->isIntOrIntVector() && 3366 !isa<PointerType>(LHS->getType())) 3367 return Error(Loc, "icmp requires integer operands"); 3368 Inst = new ICmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3369 } 3370 return false; 3371} 3372 3373//===----------------------------------------------------------------------===// 3374// Other Instructions. 3375//===----------------------------------------------------------------------===// 3376 3377 3378/// ParseCast 3379/// ::= CastOpc TypeAndValue 'to' Type 3380bool LLParser::ParseCast(Instruction *&Inst, PerFunctionState &PFS, 3381 unsigned Opc) { 3382 LocTy Loc; Value *Op; 3383 PATypeHolder DestTy(Type::getVoidTy(Context)); 3384 if (ParseTypeAndValue(Op, Loc, PFS) || 3385 ParseToken(lltok::kw_to, "expected 'to' after cast value") || 3386 ParseType(DestTy)) 3387 return true; 3388 3389 if (!CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy)) { 3390 CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy); 3391 return Error(Loc, "invalid cast opcode for cast from '" + 3392 Op->getType()->getDescription() + "' to '" + 3393 DestTy->getDescription() + "'"); 3394 } 3395 Inst = CastInst::Create((Instruction::CastOps)Opc, Op, DestTy); 3396 return false; 3397} 3398 3399/// ParseSelect 3400/// ::= 'select' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3401bool LLParser::ParseSelect(Instruction *&Inst, PerFunctionState &PFS) { 3402 LocTy Loc; 3403 Value *Op0, *Op1, *Op2; 3404 if (ParseTypeAndValue(Op0, Loc, PFS) || 3405 ParseToken(lltok::comma, "expected ',' after select condition") || 3406 ParseTypeAndValue(Op1, PFS) || 3407 ParseToken(lltok::comma, "expected ',' after select value") || 3408 ParseTypeAndValue(Op2, PFS)) 3409 return true; 3410 3411 if (const char *Reason = SelectInst::areInvalidOperands(Op0, Op1, Op2)) 3412 return Error(Loc, Reason); 3413 3414 Inst = SelectInst::Create(Op0, Op1, Op2); 3415 return false; 3416} 3417 3418/// ParseVA_Arg 3419/// ::= 'va_arg' TypeAndValue ',' Type 3420bool LLParser::ParseVA_Arg(Instruction *&Inst, PerFunctionState &PFS) { 3421 Value *Op; 3422 PATypeHolder EltTy(Type::getVoidTy(Context)); 3423 LocTy TypeLoc; 3424 if (ParseTypeAndValue(Op, PFS) || 3425 ParseToken(lltok::comma, "expected ',' after vaarg operand") || 3426 ParseType(EltTy, TypeLoc)) 3427 return true; 3428 3429 if (!EltTy->isFirstClassType()) 3430 return Error(TypeLoc, "va_arg requires operand with first class type"); 3431 3432 Inst = new VAArgInst(Op, EltTy); 3433 return false; 3434} 3435 3436/// ParseExtractElement 3437/// ::= 'extractelement' TypeAndValue ',' TypeAndValue 3438bool LLParser::ParseExtractElement(Instruction *&Inst, PerFunctionState &PFS) { 3439 LocTy Loc; 3440 Value *Op0, *Op1; 3441 if (ParseTypeAndValue(Op0, Loc, PFS) || 3442 ParseToken(lltok::comma, "expected ',' after extract value") || 3443 ParseTypeAndValue(Op1, PFS)) 3444 return true; 3445 3446 if (!ExtractElementInst::isValidOperands(Op0, Op1)) 3447 return Error(Loc, "invalid extractelement operands"); 3448 3449 Inst = ExtractElementInst::Create(Op0, Op1); 3450 return false; 3451} 3452 3453/// ParseInsertElement 3454/// ::= 'insertelement' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3455bool LLParser::ParseInsertElement(Instruction *&Inst, PerFunctionState &PFS) { 3456 LocTy Loc; 3457 Value *Op0, *Op1, *Op2; 3458 if (ParseTypeAndValue(Op0, Loc, PFS) || 3459 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3460 ParseTypeAndValue(Op1, PFS) || 3461 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3462 ParseTypeAndValue(Op2, PFS)) 3463 return true; 3464 3465 if (!InsertElementInst::isValidOperands(Op0, Op1, Op2)) 3466 return Error(Loc, "invalid insertelement operands"); 3467 3468 Inst = InsertElementInst::Create(Op0, Op1, Op2); 3469 return false; 3470} 3471 3472/// ParseShuffleVector 3473/// ::= 'shufflevector' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3474bool LLParser::ParseShuffleVector(Instruction *&Inst, PerFunctionState &PFS) { 3475 LocTy Loc; 3476 Value *Op0, *Op1, *Op2; 3477 if (ParseTypeAndValue(Op0, Loc, PFS) || 3478 ParseToken(lltok::comma, "expected ',' after shuffle mask") || 3479 ParseTypeAndValue(Op1, PFS) || 3480 ParseToken(lltok::comma, "expected ',' after shuffle value") || 3481 ParseTypeAndValue(Op2, PFS)) 3482 return true; 3483 3484 if (!ShuffleVectorInst::isValidOperands(Op0, Op1, Op2)) 3485 return Error(Loc, "invalid extractelement operands"); 3486 3487 Inst = new ShuffleVectorInst(Op0, Op1, Op2); 3488 return false; 3489} 3490 3491/// ParsePHI 3492/// ::= 'phi' Type '[' Value ',' Value ']' (',' '[' Value ',' Value ']')* 3493int LLParser::ParsePHI(Instruction *&Inst, PerFunctionState &PFS) { 3494 PATypeHolder Ty(Type::getVoidTy(Context)); 3495 Value *Op0, *Op1; 3496 LocTy TypeLoc = Lex.getLoc(); 3497 3498 if (ParseType(Ty) || 3499 ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3500 ParseValue(Ty, Op0, PFS) || 3501 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3502 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3503 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3504 return true; 3505 3506 bool AteExtraComma = false; 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 AteExtraComma = true; 3516 break; 3517 } 3518 3519 if (ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3520 ParseValue(Ty, Op0, PFS) || 3521 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3522 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3523 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3524 return true; 3525 } 3526 3527 if (!Ty->isFirstClassType()) 3528 return Error(TypeLoc, "phi node must have first class type"); 3529 3530 PHINode *PN = PHINode::Create(Ty); 3531 PN->reserveOperandSpace(PHIVals.size()); 3532 for (unsigned i = 0, e = PHIVals.size(); i != e; ++i) 3533 PN->addIncoming(PHIVals[i].first, PHIVals[i].second); 3534 Inst = PN; 3535 return AteExtraComma ? InstExtraComma : InstNormal; 3536} 3537 3538/// ParseCall 3539/// ::= 'tail'? 'call' OptionalCallingConv OptionalAttrs Type Value 3540/// ParameterList OptionalAttrs 3541bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS, 3542 bool isTail) { 3543 unsigned RetAttrs, FnAttrs; 3544 CallingConv::ID CC; 3545 PATypeHolder RetType(Type::getVoidTy(Context)); 3546 LocTy RetTypeLoc; 3547 ValID CalleeID; 3548 SmallVector<ParamInfo, 16> ArgList; 3549 LocTy CallLoc = Lex.getLoc(); 3550 3551 if ((isTail && ParseToken(lltok::kw_call, "expected 'tail call'")) || 3552 ParseOptionalCallingConv(CC) || 3553 ParseOptionalAttrs(RetAttrs, 1) || 3554 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3555 ParseValID(CalleeID) || 3556 ParseParameterList(ArgList, PFS) || 3557 ParseOptionalAttrs(FnAttrs, 2)) 3558 return true; 3559 3560 // If RetType is a non-function pointer type, then this is the short syntax 3561 // for the call, which means that RetType is just the return type. Infer the 3562 // rest of the function argument types from the arguments that are present. 3563 const PointerType *PFTy = 0; 3564 const FunctionType *Ty = 0; 3565 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3566 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3567 // Pull out the types of all of the arguments... 3568 std::vector<const Type*> ParamTypes; 3569 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3570 ParamTypes.push_back(ArgList[i].V->getType()); 3571 3572 if (!FunctionType::isValidReturnType(RetType)) 3573 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3574 3575 Ty = FunctionType::get(RetType, ParamTypes, false); 3576 PFTy = PointerType::getUnqual(Ty); 3577 } 3578 3579 // Look up the callee. 3580 Value *Callee; 3581 if (ConvertValIDToValue(PFTy, CalleeID, Callee, PFS)) return true; 3582 3583 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 3584 // function attributes. 3585 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 3586 if (FnAttrs & ObsoleteFuncAttrs) { 3587 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 3588 FnAttrs &= ~ObsoleteFuncAttrs; 3589 } 3590 3591 // Set up the Attributes for the function. 3592 SmallVector<AttributeWithIndex, 8> Attrs; 3593 if (RetAttrs != Attribute::None) 3594 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3595 3596 SmallVector<Value*, 8> Args; 3597 3598 // Loop through FunctionType's arguments and ensure they are specified 3599 // correctly. Also, gather any parameter attributes. 3600 FunctionType::param_iterator I = Ty->param_begin(); 3601 FunctionType::param_iterator E = Ty->param_end(); 3602 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3603 const Type *ExpectedTy = 0; 3604 if (I != E) { 3605 ExpectedTy = *I++; 3606 } else if (!Ty->isVarArg()) { 3607 return Error(ArgList[i].Loc, "too many arguments specified"); 3608 } 3609 3610 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3611 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3612 ExpectedTy->getDescription() + "'"); 3613 Args.push_back(ArgList[i].V); 3614 if (ArgList[i].Attrs != Attribute::None) 3615 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3616 } 3617 3618 if (I != E) 3619 return Error(CallLoc, "not enough parameters specified for call"); 3620 3621 if (FnAttrs != Attribute::None) 3622 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3623 3624 // Finish off the Attributes and check them 3625 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3626 3627 CallInst *CI = CallInst::Create(Callee, Args.begin(), Args.end()); 3628 CI->setTailCall(isTail); 3629 CI->setCallingConv(CC); 3630 CI->setAttributes(PAL); 3631 Inst = CI; 3632 return false; 3633} 3634 3635//===----------------------------------------------------------------------===// 3636// Memory Instructions. 3637//===----------------------------------------------------------------------===// 3638 3639/// ParseAlloc 3640/// ::= 'malloc' Type (',' TypeAndValue)? (',' OptionalInfo)? 3641/// ::= 'alloca' Type (',' TypeAndValue)? (',' OptionalInfo)? 3642int LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS, 3643 BasicBlock* BB, bool isAlloca) { 3644 PATypeHolder Ty(Type::getVoidTy(Context)); 3645 Value *Size = 0; 3646 LocTy SizeLoc; 3647 unsigned Alignment = 0; 3648 if (ParseType(Ty)) return true; 3649 3650 bool AteExtraComma = false; 3651 if (EatIfPresent(lltok::comma)) { 3652 if (Lex.getKind() == lltok::kw_align) { 3653 if (ParseOptionalAlignment(Alignment)) return true; 3654 } else if (Lex.getKind() == lltok::MetadataVar) { 3655 AteExtraComma = true; 3656 } else { 3657 if (ParseTypeAndValue(Size, SizeLoc, PFS) || 3658 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3659 return true; 3660 } 3661 } 3662 3663 if (Size && Size->getType() != Type::getInt32Ty(Context)) 3664 return Error(SizeLoc, "element count must be i32"); 3665 3666 if (isAlloca) { 3667 Inst = new AllocaInst(Ty, Size, Alignment); 3668 return AteExtraComma ? InstExtraComma : InstNormal; 3669 } 3670 3671 // Autoupgrade old malloc instruction to malloc call. 3672 // FIXME: Remove in LLVM 3.0. 3673 const Type *IntPtrTy = Type::getInt32Ty(Context); 3674 Constant *AllocSize = ConstantExpr::getSizeOf(Ty); 3675 AllocSize = ConstantExpr::getTruncOrBitCast(AllocSize, IntPtrTy); 3676 if (!MallocF) 3677 // Prototype malloc as "void *(int32)". 3678 // This function is renamed as "malloc" in ValidateEndOfModule(). 3679 MallocF = cast<Function>( 3680 M->getOrInsertFunction("", Type::getInt8PtrTy(Context), IntPtrTy, NULL)); 3681 Inst = CallInst::CreateMalloc(BB, IntPtrTy, Ty, AllocSize, Size, MallocF); 3682return AteExtraComma ? InstExtraComma : InstNormal; 3683} 3684 3685/// ParseFree 3686/// ::= 'free' TypeAndValue 3687bool LLParser::ParseFree(Instruction *&Inst, PerFunctionState &PFS, 3688 BasicBlock* BB) { 3689 Value *Val; LocTy Loc; 3690 if (ParseTypeAndValue(Val, Loc, PFS)) return true; 3691 if (!isa<PointerType>(Val->getType())) 3692 return Error(Loc, "operand to free must be a pointer"); 3693 Inst = CallInst::CreateFree(Val, BB); 3694 return false; 3695} 3696 3697/// ParseLoad 3698/// ::= 'volatile'? 'load' TypeAndValue (',' OptionalInfo)? 3699int LLParser::ParseLoad(Instruction *&Inst, PerFunctionState &PFS, 3700 bool isVolatile) { 3701 Value *Val; LocTy Loc; 3702 unsigned Alignment = 0; 3703 bool AteExtraComma = false; 3704 if (ParseTypeAndValue(Val, Loc, PFS) || 3705 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3706 return true; 3707 3708 if (!isa<PointerType>(Val->getType()) || 3709 !cast<PointerType>(Val->getType())->getElementType()->isFirstClassType()) 3710 return Error(Loc, "load operand must be a pointer to a first class type"); 3711 3712 Inst = new LoadInst(Val, "", isVolatile, Alignment); 3713 return AteExtraComma ? InstExtraComma : InstNormal; 3714} 3715 3716/// ParseStore 3717/// ::= 'volatile'? 'store' TypeAndValue ',' TypeAndValue (',' 'align' i32)? 3718int LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS, 3719 bool isVolatile) { 3720 Value *Val, *Ptr; LocTy Loc, PtrLoc; 3721 unsigned Alignment = 0; 3722 bool AteExtraComma = false; 3723 if (ParseTypeAndValue(Val, Loc, PFS) || 3724 ParseToken(lltok::comma, "expected ',' after store operand") || 3725 ParseTypeAndValue(Ptr, PtrLoc, PFS) || 3726 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3727 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 AteExtraComma ? InstExtraComma : InstNormal; 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)* 3761int 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 bool AteExtraComma = false; 3773 while (EatIfPresent(lltok::comma)) { 3774 if (Lex.getKind() == lltok::MetadataVar) { 3775 AteExtraComma = true; 3776 break; 3777 } 3778 if (ParseTypeAndValue(Val, EltLoc, PFS)) return true; 3779 if (!isa<IntegerType>(Val->getType())) 3780 return Error(EltLoc, "getelementptr index must be an integer"); 3781 Indices.push_back(Val); 3782 } 3783 3784 if (!GetElementPtrInst::getIndexedType(Ptr->getType(), 3785 Indices.begin(), Indices.end())) 3786 return Error(Loc, "invalid getelementptr indices"); 3787 Inst = GetElementPtrInst::Create(Ptr, Indices.begin(), Indices.end()); 3788 if (InBounds) 3789 cast<GetElementPtrInst>(Inst)->setIsInBounds(true); 3790 return AteExtraComma ? InstExtraComma : InstNormal; 3791} 3792 3793/// ParseExtractValue 3794/// ::= 'extractvalue' TypeAndValue (',' uint32)+ 3795int LLParser::ParseExtractValue(Instruction *&Inst, PerFunctionState &PFS) { 3796 Value *Val; LocTy Loc; 3797 SmallVector<unsigned, 4> Indices; 3798 bool AteExtraComma; 3799 if (ParseTypeAndValue(Val, Loc, PFS) || 3800 ParseIndexList(Indices, AteExtraComma)) 3801 return true; 3802 3803 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 3804 return Error(Loc, "extractvalue operand must be array or struct"); 3805 3806 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 3807 Indices.end())) 3808 return Error(Loc, "invalid indices for extractvalue"); 3809 Inst = ExtractValueInst::Create(Val, Indices.begin(), Indices.end()); 3810 return AteExtraComma ? InstExtraComma : InstNormal; 3811} 3812 3813/// ParseInsertValue 3814/// ::= 'insertvalue' TypeAndValue ',' TypeAndValue (',' uint32)+ 3815int LLParser::ParseInsertValue(Instruction *&Inst, PerFunctionState &PFS) { 3816 Value *Val0, *Val1; LocTy Loc0, Loc1; 3817 SmallVector<unsigned, 4> Indices; 3818 bool AteExtraComma; 3819 if (ParseTypeAndValue(Val0, Loc0, PFS) || 3820 ParseToken(lltok::comma, "expected comma after insertvalue operand") || 3821 ParseTypeAndValue(Val1, Loc1, PFS) || 3822 ParseIndexList(Indices, AteExtraComma)) 3823 return true; 3824 3825 if (!isa<StructType>(Val0->getType()) && !isa<ArrayType>(Val0->getType())) 3826 return Error(Loc0, "extractvalue operand must be array or struct"); 3827 3828 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 3829 Indices.end())) 3830 return Error(Loc0, "invalid indices for insertvalue"); 3831 Inst = InsertValueInst::Create(Val0, Val1, Indices.begin(), Indices.end()); 3832 return AteExtraComma ? InstExtraComma : InstNormal; 3833} 3834 3835//===----------------------------------------------------------------------===// 3836// Embedded metadata. 3837//===----------------------------------------------------------------------===// 3838 3839/// ParseMDNodeVector 3840/// ::= Element (',' Element)* 3841/// Element 3842/// ::= 'null' | TypeAndValue 3843bool LLParser::ParseMDNodeVector(SmallVectorImpl<Value*> &Elts) { 3844 do { 3845 // Null is a special case since it is typeless. 3846 if (EatIfPresent(lltok::kw_null)) { 3847 Elts.push_back(0); 3848 continue; 3849 } 3850 3851 Value *V = 0; 3852 PATypeHolder Ty(Type::getVoidTy(Context)); 3853 ValID ID; 3854 if (ParseType(Ty) || ParseValID(ID) || 3855 ConvertGlobalOrMetadataValIDToValue(Ty, ID, V)) 3856 return true; 3857 3858 Elts.push_back(V); 3859 } while (EatIfPresent(lltok::comma)); 3860 3861 return false; 3862} 3863