LLParser.cpp revision 6225d64ba244cdf4af3c44e113fc8c589fa39508
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/LLVMContext.h" 22#include "llvm/Metadata.h" 23#include "llvm/Module.h" 24#include "llvm/Operator.h" 25#include "llvm/ValueSymbolTable.h" 26#include "llvm/ADT/SmallPtrSet.h" 27#include "llvm/ADT/StringExtras.h" 28#include "llvm/Support/ErrorHandling.h" 29#include "llvm/Support/raw_ostream.h" 30using namespace llvm; 31 32namespace llvm { 33 /// ValID - Represents a reference of a definition of some sort with no type. 34 /// There are several cases where we have to parse the value but where the 35 /// type can depend on later context. This may either be a numeric reference 36 /// or a symbolic (%var) reference. This is just a discriminated union. 37 struct ValID { 38 enum { 39 t_LocalID, t_GlobalID, // ID in UIntVal. 40 t_LocalName, t_GlobalName, // Name in StrVal. 41 t_APSInt, t_APFloat, // Value in APSIntVal/APFloatVal. 42 t_Null, t_Undef, t_Zero, // No value. 43 t_EmptyArray, // No value: [] 44 t_Constant, // Value in ConstantVal. 45 t_InlineAsm, // Value in StrVal/StrVal2/UIntVal. 46 t_Metadata // Value in MetadataVal. 47 } Kind; 48 49 LLParser::LocTy Loc; 50 unsigned UIntVal; 51 std::string StrVal, StrVal2; 52 APSInt APSIntVal; 53 APFloat APFloatVal; 54 Constant *ConstantVal; 55 MetadataBase *MetadataVal; 56 ValID() : APFloatVal(0.0) {} 57 }; 58} 59 60/// Run: module ::= toplevelentity* 61bool LLParser::Run() { 62 // Prime the lexer. 63 Lex.Lex(); 64 65 return ParseTopLevelEntities() || 66 ValidateEndOfModule(); 67} 68 69/// ValidateEndOfModule - Do final validity and sanity checks at the end of the 70/// module. 71bool LLParser::ValidateEndOfModule() { 72 if (!ForwardRefTypes.empty()) 73 return Error(ForwardRefTypes.begin()->second.second, 74 "use of undefined type named '" + 75 ForwardRefTypes.begin()->first + "'"); 76 if (!ForwardRefTypeIDs.empty()) 77 return Error(ForwardRefTypeIDs.begin()->second.second, 78 "use of undefined type '%" + 79 utostr(ForwardRefTypeIDs.begin()->first) + "'"); 80 81 if (!ForwardRefVals.empty()) 82 return Error(ForwardRefVals.begin()->second.second, 83 "use of undefined value '@" + ForwardRefVals.begin()->first + 84 "'"); 85 86 if (!ForwardRefValIDs.empty()) 87 return Error(ForwardRefValIDs.begin()->second.second, 88 "use of undefined value '@" + 89 utostr(ForwardRefValIDs.begin()->first) + "'"); 90 91 if (!ForwardRefMDNodes.empty()) 92 return Error(ForwardRefMDNodes.begin()->second.second, 93 "use of undefined metadata '!" + 94 utostr(ForwardRefMDNodes.begin()->first) + "'"); 95 96 97 // Look for intrinsic functions and CallInst that need to be upgraded 98 for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ) 99 UpgradeCallsToIntrinsic(FI++); // must be post-increment, as we remove 100 101 // Check debug info intrinsics. 102 CheckDebugInfoIntrinsics(M); 103 return false; 104} 105 106//===----------------------------------------------------------------------===// 107// Top-Level Entities 108//===----------------------------------------------------------------------===// 109 110bool LLParser::ParseTopLevelEntities() { 111 while (1) { 112 switch (Lex.getKind()) { 113 default: return TokError("expected top-level entity"); 114 case lltok::Eof: return false; 115 //case lltok::kw_define: 116 case lltok::kw_declare: if (ParseDeclare()) return true; break; 117 case lltok::kw_define: if (ParseDefine()) return true; break; 118 case lltok::kw_module: if (ParseModuleAsm()) return true; break; 119 case lltok::kw_target: if (ParseTargetDefinition()) return true; break; 120 case lltok::kw_deplibs: if (ParseDepLibs()) return true; break; 121 case lltok::kw_type: if (ParseUnnamedType()) return true; break; 122 case lltok::LocalVarID: if (ParseUnnamedType()) return true; break; 123 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0 124 case lltok::LocalVar: if (ParseNamedType()) return true; break; 125 case lltok::GlobalID: if (ParseUnnamedGlobal()) return true; break; 126 case lltok::GlobalVar: if (ParseNamedGlobal()) return true; break; 127 case lltok::Metadata: if (ParseStandaloneMetadata()) return true; break; 128 case lltok::NamedOrCustomMD: if (ParseNamedMetadata()) return true; break; 129 130 // The Global variable production with no name can have many different 131 // optional leading prefixes, the production is: 132 // GlobalVar ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 133 // OptionalAddrSpace ('constant'|'global') ... 134 case lltok::kw_private : // OptionalLinkage 135 case lltok::kw_linker_private: // OptionalLinkage 136 case lltok::kw_internal: // OptionalLinkage 137 case lltok::kw_weak: // OptionalLinkage 138 case lltok::kw_weak_odr: // OptionalLinkage 139 case lltok::kw_linkonce: // OptionalLinkage 140 case lltok::kw_linkonce_odr: // OptionalLinkage 141 case lltok::kw_appending: // OptionalLinkage 142 case lltok::kw_dllexport: // OptionalLinkage 143 case lltok::kw_common: // OptionalLinkage 144 case lltok::kw_dllimport: // OptionalLinkage 145 case lltok::kw_extern_weak: // OptionalLinkage 146 case lltok::kw_external: { // OptionalLinkage 147 unsigned Linkage, Visibility; 148 if (ParseOptionalLinkage(Linkage) || 149 ParseOptionalVisibility(Visibility) || 150 ParseGlobal("", SMLoc(), Linkage, true, Visibility)) 151 return true; 152 break; 153 } 154 case lltok::kw_default: // OptionalVisibility 155 case lltok::kw_hidden: // OptionalVisibility 156 case lltok::kw_protected: { // OptionalVisibility 157 unsigned Visibility; 158 if (ParseOptionalVisibility(Visibility) || 159 ParseGlobal("", SMLoc(), 0, false, Visibility)) 160 return true; 161 break; 162 } 163 164 case lltok::kw_thread_local: // OptionalThreadLocal 165 case lltok::kw_addrspace: // OptionalAddrSpace 166 case lltok::kw_constant: // GlobalType 167 case lltok::kw_global: // GlobalType 168 if (ParseGlobal("", SMLoc(), 0, false, 0)) return true; 169 break; 170 } 171 } 172} 173 174 175/// toplevelentity 176/// ::= 'module' 'asm' STRINGCONSTANT 177bool LLParser::ParseModuleAsm() { 178 assert(Lex.getKind() == lltok::kw_module); 179 Lex.Lex(); 180 181 std::string AsmStr; 182 if (ParseToken(lltok::kw_asm, "expected 'module asm'") || 183 ParseStringConstant(AsmStr)) return true; 184 185 const std::string &AsmSoFar = M->getModuleInlineAsm(); 186 if (AsmSoFar.empty()) 187 M->setModuleInlineAsm(AsmStr); 188 else 189 M->setModuleInlineAsm(AsmSoFar+"\n"+AsmStr); 190 return false; 191} 192 193/// toplevelentity 194/// ::= 'target' 'triple' '=' STRINGCONSTANT 195/// ::= 'target' 'datalayout' '=' STRINGCONSTANT 196bool LLParser::ParseTargetDefinition() { 197 assert(Lex.getKind() == lltok::kw_target); 198 std::string Str; 199 switch (Lex.Lex()) { 200 default: return TokError("unknown target property"); 201 case lltok::kw_triple: 202 Lex.Lex(); 203 if (ParseToken(lltok::equal, "expected '=' after target triple") || 204 ParseStringConstant(Str)) 205 return true; 206 M->setTargetTriple(Str); 207 return false; 208 case lltok::kw_datalayout: 209 Lex.Lex(); 210 if (ParseToken(lltok::equal, "expected '=' after target datalayout") || 211 ParseStringConstant(Str)) 212 return true; 213 M->setDataLayout(Str); 214 return false; 215 } 216} 217 218/// toplevelentity 219/// ::= 'deplibs' '=' '[' ']' 220/// ::= 'deplibs' '=' '[' STRINGCONSTANT (',' STRINGCONSTANT)* ']' 221bool LLParser::ParseDepLibs() { 222 assert(Lex.getKind() == lltok::kw_deplibs); 223 Lex.Lex(); 224 if (ParseToken(lltok::equal, "expected '=' after deplibs") || 225 ParseToken(lltok::lsquare, "expected '=' after deplibs")) 226 return true; 227 228 if (EatIfPresent(lltok::rsquare)) 229 return false; 230 231 std::string Str; 232 if (ParseStringConstant(Str)) return true; 233 M->addLibrary(Str); 234 235 while (EatIfPresent(lltok::comma)) { 236 if (ParseStringConstant(Str)) return true; 237 M->addLibrary(Str); 238 } 239 240 return ParseToken(lltok::rsquare, "expected ']' at end of list"); 241} 242 243/// ParseUnnamedType: 244/// ::= 'type' type 245/// ::= LocalVarID '=' 'type' type 246bool LLParser::ParseUnnamedType() { 247 unsigned TypeID = NumberedTypes.size(); 248 249 // Handle the LocalVarID form. 250 if (Lex.getKind() == lltok::LocalVarID) { 251 if (Lex.getUIntVal() != TypeID) 252 return Error(Lex.getLoc(), "type expected to be numbered '%" + 253 utostr(TypeID) + "'"); 254 Lex.Lex(); // eat LocalVarID; 255 256 if (ParseToken(lltok::equal, "expected '=' after name")) 257 return true; 258 } 259 260 assert(Lex.getKind() == lltok::kw_type); 261 LocTy TypeLoc = Lex.getLoc(); 262 Lex.Lex(); // eat kw_type 263 264 PATypeHolder Ty(Type::getVoidTy(Context)); 265 if (ParseType(Ty)) return true; 266 267 // See if this type was previously referenced. 268 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 269 FI = ForwardRefTypeIDs.find(TypeID); 270 if (FI != ForwardRefTypeIDs.end()) { 271 if (FI->second.first.get() == Ty) 272 return Error(TypeLoc, "self referential type is invalid"); 273 274 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 275 Ty = FI->second.first.get(); 276 ForwardRefTypeIDs.erase(FI); 277 } 278 279 NumberedTypes.push_back(Ty); 280 281 return false; 282} 283 284/// toplevelentity 285/// ::= LocalVar '=' 'type' type 286bool LLParser::ParseNamedType() { 287 std::string Name = Lex.getStrVal(); 288 LocTy NameLoc = Lex.getLoc(); 289 Lex.Lex(); // eat LocalVar. 290 291 PATypeHolder Ty(Type::getVoidTy(Context)); 292 293 if (ParseToken(lltok::equal, "expected '=' after name") || 294 ParseToken(lltok::kw_type, "expected 'type' after name") || 295 ParseType(Ty)) 296 return true; 297 298 // Set the type name, checking for conflicts as we do so. 299 bool AlreadyExists = M->addTypeName(Name, Ty); 300 if (!AlreadyExists) return false; 301 302 // See if this type is a forward reference. We need to eagerly resolve 303 // types to allow recursive type redefinitions below. 304 std::map<std::string, std::pair<PATypeHolder, LocTy> >::iterator 305 FI = ForwardRefTypes.find(Name); 306 if (FI != ForwardRefTypes.end()) { 307 if (FI->second.first.get() == Ty) 308 return Error(NameLoc, "self referential type is invalid"); 309 310 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 311 Ty = FI->second.first.get(); 312 ForwardRefTypes.erase(FI); 313 } 314 315 // Inserting a name that is already defined, get the existing name. 316 const Type *Existing = M->getTypeByName(Name); 317 assert(Existing && "Conflict but no matching type?!"); 318 319 // Otherwise, this is an attempt to redefine a type. That's okay if 320 // the redefinition is identical to the original. 321 // FIXME: REMOVE REDEFINITIONS IN LLVM 3.0 322 if (Existing == Ty) return false; 323 324 // Any other kind of (non-equivalent) redefinition is an error. 325 return Error(NameLoc, "redefinition of type named '" + Name + "' of type '" + 326 Ty->getDescription() + "'"); 327} 328 329 330/// toplevelentity 331/// ::= 'declare' FunctionHeader 332bool LLParser::ParseDeclare() { 333 assert(Lex.getKind() == lltok::kw_declare); 334 Lex.Lex(); 335 336 Function *F; 337 return ParseFunctionHeader(F, false); 338} 339 340/// toplevelentity 341/// ::= 'define' FunctionHeader '{' ... 342bool LLParser::ParseDefine() { 343 assert(Lex.getKind() == lltok::kw_define); 344 Lex.Lex(); 345 346 Function *F; 347 return ParseFunctionHeader(F, true) || 348 ParseFunctionBody(*F); 349} 350 351/// ParseGlobalType 352/// ::= 'constant' 353/// ::= 'global' 354bool LLParser::ParseGlobalType(bool &IsConstant) { 355 if (Lex.getKind() == lltok::kw_constant) 356 IsConstant = true; 357 else if (Lex.getKind() == lltok::kw_global) 358 IsConstant = false; 359 else { 360 IsConstant = false; 361 return TokError("expected 'global' or 'constant'"); 362 } 363 Lex.Lex(); 364 return false; 365} 366 367/// ParseUnnamedGlobal: 368/// OptionalVisibility ALIAS ... 369/// OptionalLinkage OptionalVisibility ... -> global variable 370/// GlobalID '=' OptionalVisibility ALIAS ... 371/// GlobalID '=' OptionalLinkage OptionalVisibility ... -> global variable 372bool LLParser::ParseUnnamedGlobal() { 373 unsigned VarID = NumberedVals.size(); 374 std::string Name; 375 LocTy NameLoc = Lex.getLoc(); 376 377 // Handle the GlobalID form. 378 if (Lex.getKind() == lltok::GlobalID) { 379 if (Lex.getUIntVal() != VarID) 380 return Error(Lex.getLoc(), "variable expected to be numbered '%" + 381 utostr(VarID) + "'"); 382 Lex.Lex(); // eat GlobalID; 383 384 if (ParseToken(lltok::equal, "expected '=' after name")) 385 return true; 386 } 387 388 bool HasLinkage; 389 unsigned Linkage, Visibility; 390 if (ParseOptionalLinkage(Linkage, HasLinkage) || 391 ParseOptionalVisibility(Visibility)) 392 return true; 393 394 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 395 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 396 return ParseAlias(Name, NameLoc, Visibility); 397} 398 399/// ParseNamedGlobal: 400/// GlobalVar '=' OptionalVisibility ALIAS ... 401/// GlobalVar '=' OptionalLinkage OptionalVisibility ... -> global variable 402bool LLParser::ParseNamedGlobal() { 403 assert(Lex.getKind() == lltok::GlobalVar); 404 LocTy NameLoc = Lex.getLoc(); 405 std::string Name = Lex.getStrVal(); 406 Lex.Lex(); 407 408 bool HasLinkage; 409 unsigned Linkage, Visibility; 410 if (ParseToken(lltok::equal, "expected '=' in global variable") || 411 ParseOptionalLinkage(Linkage, HasLinkage) || 412 ParseOptionalVisibility(Visibility)) 413 return true; 414 415 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 416 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 417 return ParseAlias(Name, NameLoc, Visibility); 418} 419 420// MDString: 421// ::= '!' STRINGCONSTANT 422bool LLParser::ParseMDString(MetadataBase *&MDS) { 423 std::string Str; 424 if (ParseStringConstant(Str)) return true; 425 MDS = MDString::get(Context, Str); 426 return false; 427} 428 429// MDNode: 430// ::= '!' MDNodeNumber 431bool LLParser::ParseMDNode(MetadataBase *&Node) { 432 // !{ ..., !42, ... } 433 unsigned MID = 0; 434 if (ParseUInt32(MID)) return true; 435 436 // Check existing MDNode. 437 std::map<unsigned, MetadataBase *>::iterator I = MetadataCache.find(MID); 438 if (I != MetadataCache.end()) { 439 Node = I->second; 440 return false; 441 } 442 443 // Check known forward references. 444 std::map<unsigned, std::pair<MetadataBase *, LocTy> >::iterator 445 FI = ForwardRefMDNodes.find(MID); 446 if (FI != ForwardRefMDNodes.end()) { 447 Node = FI->second.first; 448 return false; 449 } 450 451 // Create MDNode forward reference 452 SmallVector<Value *, 1> Elts; 453 std::string FwdRefName = "llvm.mdnode.fwdref." + utostr(MID); 454 Elts.push_back(MDString::get(Context, FwdRefName)); 455 MDNode *FwdNode = MDNode::get(Context, Elts.data(), Elts.size()); 456 ForwardRefMDNodes[MID] = std::make_pair(FwdNode, Lex.getLoc()); 457 Node = FwdNode; 458 return false; 459} 460 461///ParseNamedMetadata: 462/// !foo = !{ !1, !2 } 463bool LLParser::ParseNamedMetadata() { 464 assert(Lex.getKind() == lltok::NamedOrCustomMD); 465 Lex.Lex(); 466 std::string Name = Lex.getStrVal(); 467 468 if (ParseToken(lltok::equal, "expected '=' here")) 469 return true; 470 471 if (Lex.getKind() != lltok::Metadata) 472 return TokError("Expected '!' here"); 473 Lex.Lex(); 474 475 if (Lex.getKind() != lltok::lbrace) 476 return TokError("Expected '{' here"); 477 Lex.Lex(); 478 SmallVector<MetadataBase *, 8> Elts; 479 do { 480 if (Lex.getKind() != lltok::Metadata) 481 return TokError("Expected '!' here"); 482 Lex.Lex(); 483 MetadataBase *N = 0; 484 if (ParseMDNode(N)) return true; 485 Elts.push_back(N); 486 } while (EatIfPresent(lltok::comma)); 487 488 if (ParseToken(lltok::rbrace, "expected end of metadata node")) 489 return true; 490 491 NamedMDNode::Create(Context, Name, Elts.data(), Elts.size(), M); 492 return false; 493} 494 495/// ParseStandaloneMetadata: 496/// !42 = !{...} 497bool LLParser::ParseStandaloneMetadata() { 498 assert(Lex.getKind() == lltok::Metadata); 499 Lex.Lex(); 500 unsigned MetadataID = 0; 501 if (ParseUInt32(MetadataID)) 502 return true; 503 if (MetadataCache.find(MetadataID) != MetadataCache.end()) 504 return TokError("Metadata id is already used"); 505 if (ParseToken(lltok::equal, "expected '=' here")) 506 return true; 507 508 LocTy TyLoc; 509 PATypeHolder Ty(Type::getVoidTy(Context)); 510 if (ParseType(Ty, TyLoc)) 511 return true; 512 513 if (Lex.getKind() != lltok::Metadata) 514 return TokError("Expected metadata here"); 515 516 Lex.Lex(); 517 if (Lex.getKind() != lltok::lbrace) 518 return TokError("Expected '{' here"); 519 520 SmallVector<Value *, 16> Elts; 521 if (ParseMDNodeVector(Elts) 522 || ParseToken(lltok::rbrace, "expected end of metadata node")) 523 return true; 524 525 MDNode *Init = MDNode::get(Context, Elts.data(), Elts.size()); 526 MetadataCache[MetadataID] = Init; 527 std::map<unsigned, std::pair<MetadataBase *, LocTy> >::iterator 528 FI = ForwardRefMDNodes.find(MetadataID); 529 if (FI != ForwardRefMDNodes.end()) { 530 MDNode *FwdNode = cast<MDNode>(FI->second.first); 531 FwdNode->replaceAllUsesWith(Init); 532 ForwardRefMDNodes.erase(FI); 533 } 534 535 return false; 536} 537 538/// ParseAlias: 539/// ::= GlobalVar '=' OptionalVisibility 'alias' OptionalLinkage Aliasee 540/// Aliasee 541/// ::= TypeAndValue 542/// ::= 'bitcast' '(' TypeAndValue 'to' Type ')' 543/// ::= 'getelementptr' 'inbounds'? '(' ... ')' 544/// 545/// Everything through visibility has already been parsed. 546/// 547bool LLParser::ParseAlias(const std::string &Name, LocTy NameLoc, 548 unsigned Visibility) { 549 assert(Lex.getKind() == lltok::kw_alias); 550 Lex.Lex(); 551 unsigned Linkage; 552 LocTy LinkageLoc = Lex.getLoc(); 553 if (ParseOptionalLinkage(Linkage)) 554 return true; 555 556 if (Linkage != GlobalValue::ExternalLinkage && 557 Linkage != GlobalValue::WeakAnyLinkage && 558 Linkage != GlobalValue::WeakODRLinkage && 559 Linkage != GlobalValue::InternalLinkage && 560 Linkage != GlobalValue::PrivateLinkage && 561 Linkage != GlobalValue::LinkerPrivateLinkage) 562 return Error(LinkageLoc, "invalid linkage type for alias"); 563 564 Constant *Aliasee; 565 LocTy AliaseeLoc = Lex.getLoc(); 566 if (Lex.getKind() != lltok::kw_bitcast && 567 Lex.getKind() != lltok::kw_getelementptr) { 568 if (ParseGlobalTypeAndValue(Aliasee)) return true; 569 } else { 570 // The bitcast dest type is not present, it is implied by the dest type. 571 ValID ID; 572 if (ParseValID(ID)) return true; 573 if (ID.Kind != ValID::t_Constant) 574 return Error(AliaseeLoc, "invalid aliasee"); 575 Aliasee = ID.ConstantVal; 576 } 577 578 if (!isa<PointerType>(Aliasee->getType())) 579 return Error(AliaseeLoc, "alias must have pointer type"); 580 581 // Okay, create the alias but do not insert it into the module yet. 582 GlobalAlias* GA = new GlobalAlias(Aliasee->getType(), 583 (GlobalValue::LinkageTypes)Linkage, Name, 584 Aliasee); 585 GA->setVisibility((GlobalValue::VisibilityTypes)Visibility); 586 587 // See if this value already exists in the symbol table. If so, it is either 588 // a redefinition or a definition of a forward reference. 589 if (GlobalValue *Val = 590 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name))) { 591 // See if this was a redefinition. If so, there is no entry in 592 // ForwardRefVals. 593 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 594 I = ForwardRefVals.find(Name); 595 if (I == ForwardRefVals.end()) 596 return Error(NameLoc, "redefinition of global named '@" + Name + "'"); 597 598 // Otherwise, this was a definition of forward ref. Verify that types 599 // agree. 600 if (Val->getType() != GA->getType()) 601 return Error(NameLoc, 602 "forward reference and definition of alias have different types"); 603 604 // If they agree, just RAUW the old value with the alias and remove the 605 // forward ref info. 606 Val->replaceAllUsesWith(GA); 607 Val->eraseFromParent(); 608 ForwardRefVals.erase(I); 609 } 610 611 // Insert into the module, we know its name won't collide now. 612 M->getAliasList().push_back(GA); 613 assert(GA->getNameStr() == Name && "Should not be a name conflict!"); 614 615 return false; 616} 617 618/// ParseGlobal 619/// ::= GlobalVar '=' OptionalLinkage OptionalVisibility OptionalThreadLocal 620/// OptionalAddrSpace GlobalType Type Const 621/// ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 622/// OptionalAddrSpace GlobalType Type Const 623/// 624/// Everything through visibility has been parsed already. 625/// 626bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc, 627 unsigned Linkage, bool HasLinkage, 628 unsigned Visibility) { 629 unsigned AddrSpace; 630 bool ThreadLocal, IsConstant; 631 LocTy TyLoc; 632 633 PATypeHolder Ty(Type::getVoidTy(Context)); 634 if (ParseOptionalToken(lltok::kw_thread_local, ThreadLocal) || 635 ParseOptionalAddrSpace(AddrSpace) || 636 ParseGlobalType(IsConstant) || 637 ParseType(Ty, TyLoc)) 638 return true; 639 640 // If the linkage is specified and is external, then no initializer is 641 // present. 642 Constant *Init = 0; 643 if (!HasLinkage || (Linkage != GlobalValue::DLLImportLinkage && 644 Linkage != GlobalValue::ExternalWeakLinkage && 645 Linkage != GlobalValue::ExternalLinkage)) { 646 if (ParseGlobalValue(Ty, Init)) 647 return true; 648 } 649 650 if (isa<FunctionType>(Ty) || Ty->isLabelTy()) 651 return Error(TyLoc, "invalid type for global variable"); 652 653 GlobalVariable *GV = 0; 654 655 // See if the global was forward referenced, if so, use the global. 656 if (!Name.empty()) { 657 if ((GV = M->getGlobalVariable(Name, true)) && 658 !ForwardRefVals.erase(Name)) 659 return Error(NameLoc, "redefinition of global '@" + Name + "'"); 660 } else { 661 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 662 I = ForwardRefValIDs.find(NumberedVals.size()); 663 if (I != ForwardRefValIDs.end()) { 664 GV = cast<GlobalVariable>(I->second.first); 665 ForwardRefValIDs.erase(I); 666 } 667 } 668 669 if (GV == 0) { 670 GV = new GlobalVariable(*M, Ty, false, GlobalValue::ExternalLinkage, 0, 671 Name, 0, false, AddrSpace); 672 } else { 673 if (GV->getType()->getElementType() != Ty) 674 return Error(TyLoc, 675 "forward reference and definition of global have different types"); 676 677 // Move the forward-reference to the correct spot in the module. 678 M->getGlobalList().splice(M->global_end(), M->getGlobalList(), GV); 679 } 680 681 if (Name.empty()) 682 NumberedVals.push_back(GV); 683 684 // Set the parsed properties on the global. 685 if (Init) 686 GV->setInitializer(Init); 687 GV->setConstant(IsConstant); 688 GV->setLinkage((GlobalValue::LinkageTypes)Linkage); 689 GV->setVisibility((GlobalValue::VisibilityTypes)Visibility); 690 GV->setThreadLocal(ThreadLocal); 691 692 // Parse attributes on the global. 693 while (Lex.getKind() == lltok::comma) { 694 Lex.Lex(); 695 696 if (Lex.getKind() == lltok::kw_section) { 697 Lex.Lex(); 698 GV->setSection(Lex.getStrVal()); 699 if (ParseToken(lltok::StringConstant, "expected global section string")) 700 return true; 701 } else if (Lex.getKind() == lltok::kw_align) { 702 unsigned Alignment; 703 if (ParseOptionalAlignment(Alignment)) return true; 704 GV->setAlignment(Alignment); 705 } else { 706 TokError("unknown global variable property!"); 707 } 708 } 709 710 return false; 711} 712 713 714//===----------------------------------------------------------------------===// 715// GlobalValue Reference/Resolution Routines. 716//===----------------------------------------------------------------------===// 717 718/// GetGlobalVal - Get a value with the specified name or ID, creating a 719/// forward reference record if needed. This can return null if the value 720/// exists but does not have the right type. 721GlobalValue *LLParser::GetGlobalVal(const std::string &Name, const Type *Ty, 722 LocTy Loc) { 723 const PointerType *PTy = dyn_cast<PointerType>(Ty); 724 if (PTy == 0) { 725 Error(Loc, "global variable reference must have pointer type"); 726 return 0; 727 } 728 729 // Look this name up in the normal function symbol table. 730 GlobalValue *Val = 731 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name)); 732 733 // If this is a forward reference for the value, see if we already created a 734 // forward ref record. 735 if (Val == 0) { 736 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 737 I = ForwardRefVals.find(Name); 738 if (I != ForwardRefVals.end()) 739 Val = I->second.first; 740 } 741 742 // If we have the value in the symbol table or fwd-ref table, return it. 743 if (Val) { 744 if (Val->getType() == Ty) return Val; 745 Error(Loc, "'@" + Name + "' defined with type '" + 746 Val->getType()->getDescription() + "'"); 747 return 0; 748 } 749 750 // Otherwise, create a new forward reference for this value and remember it. 751 GlobalValue *FwdVal; 752 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 753 // Function types can return opaque but functions can't. 754 if (isa<OpaqueType>(FT->getReturnType())) { 755 Error(Loc, "function may not return opaque type"); 756 return 0; 757 } 758 759 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M); 760 } else { 761 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 762 GlobalValue::ExternalWeakLinkage, 0, Name); 763 } 764 765 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 766 return FwdVal; 767} 768 769GlobalValue *LLParser::GetGlobalVal(unsigned ID, const Type *Ty, LocTy Loc) { 770 const PointerType *PTy = dyn_cast<PointerType>(Ty); 771 if (PTy == 0) { 772 Error(Loc, "global variable reference must have pointer type"); 773 return 0; 774 } 775 776 GlobalValue *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 777 778 // If this is a forward reference for the value, see if we already created a 779 // forward ref record. 780 if (Val == 0) { 781 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 782 I = ForwardRefValIDs.find(ID); 783 if (I != ForwardRefValIDs.end()) 784 Val = I->second.first; 785 } 786 787 // If we have the value in the symbol table or fwd-ref table, return it. 788 if (Val) { 789 if (Val->getType() == Ty) return Val; 790 Error(Loc, "'@" + utostr(ID) + "' defined with type '" + 791 Val->getType()->getDescription() + "'"); 792 return 0; 793 } 794 795 // Otherwise, create a new forward reference for this value and remember it. 796 GlobalValue *FwdVal; 797 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 798 // Function types can return opaque but functions can't. 799 if (isa<OpaqueType>(FT->getReturnType())) { 800 Error(Loc, "function may not return opaque type"); 801 return 0; 802 } 803 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, "", M); 804 } else { 805 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 806 GlobalValue::ExternalWeakLinkage, 0, ""); 807 } 808 809 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 810 return FwdVal; 811} 812 813 814//===----------------------------------------------------------------------===// 815// Helper Routines. 816//===----------------------------------------------------------------------===// 817 818/// ParseToken - If the current token has the specified kind, eat it and return 819/// success. Otherwise, emit the specified error and return failure. 820bool LLParser::ParseToken(lltok::Kind T, const char *ErrMsg) { 821 if (Lex.getKind() != T) 822 return TokError(ErrMsg); 823 Lex.Lex(); 824 return false; 825} 826 827/// ParseStringConstant 828/// ::= StringConstant 829bool LLParser::ParseStringConstant(std::string &Result) { 830 if (Lex.getKind() != lltok::StringConstant) 831 return TokError("expected string constant"); 832 Result = Lex.getStrVal(); 833 Lex.Lex(); 834 return false; 835} 836 837/// ParseUInt32 838/// ::= uint32 839bool LLParser::ParseUInt32(unsigned &Val) { 840 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned()) 841 return TokError("expected integer"); 842 uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(0xFFFFFFFFULL+1); 843 if (Val64 != unsigned(Val64)) 844 return TokError("expected 32-bit integer (too large)"); 845 Val = Val64; 846 Lex.Lex(); 847 return false; 848} 849 850 851/// ParseOptionalAddrSpace 852/// := /*empty*/ 853/// := 'addrspace' '(' uint32 ')' 854bool LLParser::ParseOptionalAddrSpace(unsigned &AddrSpace) { 855 AddrSpace = 0; 856 if (!EatIfPresent(lltok::kw_addrspace)) 857 return false; 858 return ParseToken(lltok::lparen, "expected '(' in address space") || 859 ParseUInt32(AddrSpace) || 860 ParseToken(lltok::rparen, "expected ')' in address space"); 861} 862 863/// ParseOptionalAttrs - Parse a potentially empty attribute list. AttrKind 864/// indicates what kind of attribute list this is: 0: function arg, 1: result, 865/// 2: function attr. 866/// 3: function arg after value: FIXME: REMOVE IN LLVM 3.0 867bool LLParser::ParseOptionalAttrs(unsigned &Attrs, unsigned AttrKind) { 868 Attrs = Attribute::None; 869 LocTy AttrLoc = Lex.getLoc(); 870 871 while (1) { 872 switch (Lex.getKind()) { 873 case lltok::kw_sext: 874 case lltok::kw_zext: 875 // Treat these as signext/zeroext if they occur in the argument list after 876 // the value, as in "call i8 @foo(i8 10 sext)". If they occur before the 877 // value, as in "call i8 @foo(i8 sext (" then it is part of a constant 878 // expr. 879 // FIXME: REMOVE THIS IN LLVM 3.0 880 if (AttrKind == 3) { 881 if (Lex.getKind() == lltok::kw_sext) 882 Attrs |= Attribute::SExt; 883 else 884 Attrs |= Attribute::ZExt; 885 break; 886 } 887 // FALL THROUGH. 888 default: // End of attributes. 889 if (AttrKind != 2 && (Attrs & Attribute::FunctionOnly)) 890 return Error(AttrLoc, "invalid use of function-only attribute"); 891 892 if (AttrKind != 0 && AttrKind != 3 && (Attrs & Attribute::ParameterOnly)) 893 return Error(AttrLoc, "invalid use of parameter-only attribute"); 894 895 return false; 896 case lltok::kw_zeroext: Attrs |= Attribute::ZExt; break; 897 case lltok::kw_signext: Attrs |= Attribute::SExt; break; 898 case lltok::kw_inreg: Attrs |= Attribute::InReg; break; 899 case lltok::kw_sret: Attrs |= Attribute::StructRet; break; 900 case lltok::kw_noalias: Attrs |= Attribute::NoAlias; break; 901 case lltok::kw_nocapture: Attrs |= Attribute::NoCapture; break; 902 case lltok::kw_byval: Attrs |= Attribute::ByVal; break; 903 case lltok::kw_nest: Attrs |= Attribute::Nest; break; 904 905 case lltok::kw_noreturn: Attrs |= Attribute::NoReturn; break; 906 case lltok::kw_nounwind: Attrs |= Attribute::NoUnwind; break; 907 case lltok::kw_noinline: Attrs |= Attribute::NoInline; break; 908 case lltok::kw_readnone: Attrs |= Attribute::ReadNone; break; 909 case lltok::kw_readonly: Attrs |= Attribute::ReadOnly; break; 910 case lltok::kw_inlinehint: Attrs |= Attribute::InlineHint; break; 911 case lltok::kw_alwaysinline: Attrs |= Attribute::AlwaysInline; break; 912 case lltok::kw_optsize: Attrs |= Attribute::OptimizeForSize; break; 913 case lltok::kw_ssp: Attrs |= Attribute::StackProtect; break; 914 case lltok::kw_sspreq: Attrs |= Attribute::StackProtectReq; break; 915 case lltok::kw_noredzone: Attrs |= Attribute::NoRedZone; break; 916 case lltok::kw_noimplicitfloat: Attrs |= Attribute::NoImplicitFloat; break; 917 case lltok::kw_naked: Attrs |= Attribute::Naked; break; 918 919 case lltok::kw_align: { 920 unsigned Alignment; 921 if (ParseOptionalAlignment(Alignment)) 922 return true; 923 Attrs |= Attribute::constructAlignmentFromInt(Alignment); 924 continue; 925 } 926 } 927 Lex.Lex(); 928 } 929} 930 931/// ParseOptionalLinkage 932/// ::= /*empty*/ 933/// ::= 'private' 934/// ::= 'linker_private' 935/// ::= 'internal' 936/// ::= 'weak' 937/// ::= 'weak_odr' 938/// ::= 'linkonce' 939/// ::= 'linkonce_odr' 940/// ::= 'appending' 941/// ::= 'dllexport' 942/// ::= 'common' 943/// ::= 'dllimport' 944/// ::= 'extern_weak' 945/// ::= 'external' 946bool LLParser::ParseOptionalLinkage(unsigned &Res, bool &HasLinkage) { 947 HasLinkage = false; 948 switch (Lex.getKind()) { 949 default: Res=GlobalValue::ExternalLinkage; return false; 950 case lltok::kw_private: Res = GlobalValue::PrivateLinkage; break; 951 case lltok::kw_linker_private: Res = GlobalValue::LinkerPrivateLinkage; break; 952 case lltok::kw_internal: Res = GlobalValue::InternalLinkage; break; 953 case lltok::kw_weak: Res = GlobalValue::WeakAnyLinkage; break; 954 case lltok::kw_weak_odr: Res = GlobalValue::WeakODRLinkage; break; 955 case lltok::kw_linkonce: Res = GlobalValue::LinkOnceAnyLinkage; break; 956 case lltok::kw_linkonce_odr: Res = GlobalValue::LinkOnceODRLinkage; break; 957 case lltok::kw_available_externally: 958 Res = GlobalValue::AvailableExternallyLinkage; 959 break; 960 case lltok::kw_appending: Res = GlobalValue::AppendingLinkage; break; 961 case lltok::kw_dllexport: Res = GlobalValue::DLLExportLinkage; break; 962 case lltok::kw_common: Res = GlobalValue::CommonLinkage; break; 963 case lltok::kw_dllimport: Res = GlobalValue::DLLImportLinkage; break; 964 case lltok::kw_extern_weak: Res = GlobalValue::ExternalWeakLinkage; break; 965 case lltok::kw_external: Res = GlobalValue::ExternalLinkage; break; 966 } 967 Lex.Lex(); 968 HasLinkage = true; 969 return false; 970} 971 972/// ParseOptionalVisibility 973/// ::= /*empty*/ 974/// ::= 'default' 975/// ::= 'hidden' 976/// ::= 'protected' 977/// 978bool LLParser::ParseOptionalVisibility(unsigned &Res) { 979 switch (Lex.getKind()) { 980 default: Res = GlobalValue::DefaultVisibility; return false; 981 case lltok::kw_default: Res = GlobalValue::DefaultVisibility; break; 982 case lltok::kw_hidden: Res = GlobalValue::HiddenVisibility; break; 983 case lltok::kw_protected: Res = GlobalValue::ProtectedVisibility; break; 984 } 985 Lex.Lex(); 986 return false; 987} 988 989/// ParseOptionalCallingConv 990/// ::= /*empty*/ 991/// ::= 'ccc' 992/// ::= 'fastcc' 993/// ::= 'coldcc' 994/// ::= 'x86_stdcallcc' 995/// ::= 'x86_fastcallcc' 996/// ::= 'arm_apcscc' 997/// ::= 'arm_aapcscc' 998/// ::= 'arm_aapcs_vfpcc' 999/// ::= 'cc' UINT 1000/// 1001bool LLParser::ParseOptionalCallingConv(CallingConv::ID &CC) { 1002 switch (Lex.getKind()) { 1003 default: CC = CallingConv::C; return false; 1004 case lltok::kw_ccc: CC = CallingConv::C; break; 1005 case lltok::kw_fastcc: CC = CallingConv::Fast; break; 1006 case lltok::kw_coldcc: CC = CallingConv::Cold; break; 1007 case lltok::kw_x86_stdcallcc: CC = CallingConv::X86_StdCall; break; 1008 case lltok::kw_x86_fastcallcc: CC = CallingConv::X86_FastCall; break; 1009 case lltok::kw_arm_apcscc: CC = CallingConv::ARM_APCS; break; 1010 case lltok::kw_arm_aapcscc: CC = CallingConv::ARM_AAPCS; break; 1011 case lltok::kw_arm_aapcs_vfpcc:CC = CallingConv::ARM_AAPCS_VFP; break; 1012 case lltok::kw_cc: { 1013 unsigned ArbitraryCC; 1014 Lex.Lex(); 1015 if (ParseUInt32(ArbitraryCC)) { 1016 return true; 1017 } else 1018 CC = static_cast<CallingConv::ID>(ArbitraryCC); 1019 return false; 1020 } 1021 break; 1022 } 1023 1024 Lex.Lex(); 1025 return false; 1026} 1027 1028/// ParseOptionalCustomMetadata 1029/// ::= /* empty */ 1030/// ::= !dbg !42 1031bool LLParser::ParseOptionalCustomMetadata() { 1032 1033 std::string Name; 1034 if (Lex.getKind() == lltok::NamedOrCustomMD) { 1035 Name = Lex.getStrVal(); 1036 Lex.Lex(); 1037 } else 1038 return false; 1039 1040 if (Lex.getKind() != lltok::Metadata) 1041 return TokError("Expected '!' here"); 1042 Lex.Lex(); 1043 1044 MetadataBase *Node; 1045 if (ParseMDNode(Node)) return true; 1046 1047 MetadataContext &TheMetadata = M->getContext().getMetadata(); 1048 unsigned MDK = TheMetadata.getMDKind(Name.c_str()); 1049 if (!MDK) 1050 MDK = TheMetadata.RegisterMDKind(Name.c_str()); 1051 MDsOnInst.push_back(std::make_pair(MDK, cast<MDNode>(Node))); 1052 1053 return false; 1054} 1055 1056/// ParseOptionalAlignment 1057/// ::= /* empty */ 1058/// ::= 'align' 4 1059bool LLParser::ParseOptionalAlignment(unsigned &Alignment) { 1060 Alignment = 0; 1061 if (!EatIfPresent(lltok::kw_align)) 1062 return false; 1063 LocTy AlignLoc = Lex.getLoc(); 1064 if (ParseUInt32(Alignment)) return true; 1065 if (!isPowerOf2_32(Alignment)) 1066 return Error(AlignLoc, "alignment is not a power of two"); 1067 return false; 1068} 1069 1070/// ParseOptionalInfo 1071/// ::= OptionalInfo (',' OptionalInfo)+ 1072bool LLParser::ParseOptionalInfo(unsigned &Alignment) { 1073 1074 // FIXME: Handle customized metadata info attached with an instruction. 1075 do { 1076 if (Lex.getKind() == lltok::NamedOrCustomMD) { 1077 if (ParseOptionalCustomMetadata()) return true; 1078 } else if (Lex.getKind() == lltok::kw_align) { 1079 if (ParseOptionalAlignment(Alignment)) return true; 1080 } else 1081 return true; 1082 } while (EatIfPresent(lltok::comma)); 1083 1084 return false; 1085} 1086 1087 1088/// ParseIndexList 1089/// ::= (',' uint32)+ 1090bool LLParser::ParseIndexList(SmallVectorImpl<unsigned> &Indices) { 1091 if (Lex.getKind() != lltok::comma) 1092 return TokError("expected ',' as start of index list"); 1093 1094 while (EatIfPresent(lltok::comma)) { 1095 unsigned Idx; 1096 if (ParseUInt32(Idx)) return true; 1097 Indices.push_back(Idx); 1098 } 1099 1100 return false; 1101} 1102 1103//===----------------------------------------------------------------------===// 1104// Type Parsing. 1105//===----------------------------------------------------------------------===// 1106 1107/// ParseType - Parse and resolve a full type. 1108bool LLParser::ParseType(PATypeHolder &Result, bool AllowVoid) { 1109 LocTy TypeLoc = Lex.getLoc(); 1110 if (ParseTypeRec(Result)) return true; 1111 1112 // Verify no unresolved uprefs. 1113 if (!UpRefs.empty()) 1114 return Error(UpRefs.back().Loc, "invalid unresolved type up reference"); 1115 1116 if (!AllowVoid && Result.get()->isVoidTy()) 1117 return Error(TypeLoc, "void type only allowed for function results"); 1118 1119 return false; 1120} 1121 1122/// HandleUpRefs - Every time we finish a new layer of types, this function is 1123/// called. It loops through the UpRefs vector, which is a list of the 1124/// currently active types. For each type, if the up-reference is contained in 1125/// the newly completed type, we decrement the level count. When the level 1126/// count reaches zero, the up-referenced type is the type that is passed in: 1127/// thus we can complete the cycle. 1128/// 1129PATypeHolder LLParser::HandleUpRefs(const Type *ty) { 1130 // If Ty isn't abstract, or if there are no up-references in it, then there is 1131 // nothing to resolve here. 1132 if (!ty->isAbstract() || UpRefs.empty()) return ty; 1133 1134 PATypeHolder Ty(ty); 1135#if 0 1136 errs() << "Type '" << Ty->getDescription() 1137 << "' newly formed. Resolving upreferences.\n" 1138 << UpRefs.size() << " upreferences active!\n"; 1139#endif 1140 1141 // If we find any resolvable upreferences (i.e., those whose NestingLevel goes 1142 // to zero), we resolve them all together before we resolve them to Ty. At 1143 // the end of the loop, if there is anything to resolve to Ty, it will be in 1144 // this variable. 1145 OpaqueType *TypeToResolve = 0; 1146 1147 for (unsigned i = 0; i != UpRefs.size(); ++i) { 1148 // Determine if 'Ty' directly contains this up-references 'LastContainedTy'. 1149 bool ContainsType = 1150 std::find(Ty->subtype_begin(), Ty->subtype_end(), 1151 UpRefs[i].LastContainedTy) != Ty->subtype_end(); 1152 1153#if 0 1154 errs() << " UR#" << i << " - TypeContains(" << Ty->getDescription() << ", " 1155 << UpRefs[i].LastContainedTy->getDescription() << ") = " 1156 << (ContainsType ? "true" : "false") 1157 << " level=" << UpRefs[i].NestingLevel << "\n"; 1158#endif 1159 if (!ContainsType) 1160 continue; 1161 1162 // Decrement level of upreference 1163 unsigned Level = --UpRefs[i].NestingLevel; 1164 UpRefs[i].LastContainedTy = Ty; 1165 1166 // If the Up-reference has a non-zero level, it shouldn't be resolved yet. 1167 if (Level != 0) 1168 continue; 1169 1170#if 0 1171 errs() << " * Resolving upreference for " << UpRefs[i].UpRefTy << "\n"; 1172#endif 1173 if (!TypeToResolve) 1174 TypeToResolve = UpRefs[i].UpRefTy; 1175 else 1176 UpRefs[i].UpRefTy->refineAbstractTypeTo(TypeToResolve); 1177 UpRefs.erase(UpRefs.begin()+i); // Remove from upreference list. 1178 --i; // Do not skip the next element. 1179 } 1180 1181 if (TypeToResolve) 1182 TypeToResolve->refineAbstractTypeTo(Ty); 1183 1184 return Ty; 1185} 1186 1187 1188/// ParseTypeRec - The recursive function used to process the internal 1189/// implementation details of types. 1190bool LLParser::ParseTypeRec(PATypeHolder &Result) { 1191 switch (Lex.getKind()) { 1192 default: 1193 return TokError("expected type"); 1194 case lltok::Type: 1195 // TypeRec ::= 'float' | 'void' (etc) 1196 Result = Lex.getTyVal(); 1197 Lex.Lex(); 1198 break; 1199 case lltok::kw_opaque: 1200 // TypeRec ::= 'opaque' 1201 Result = OpaqueType::get(Context); 1202 Lex.Lex(); 1203 break; 1204 case lltok::lbrace: 1205 // TypeRec ::= '{' ... '}' 1206 if (ParseStructType(Result, false)) 1207 return true; 1208 break; 1209 case lltok::lsquare: 1210 // TypeRec ::= '[' ... ']' 1211 Lex.Lex(); // eat the lsquare. 1212 if (ParseArrayVectorType(Result, false)) 1213 return true; 1214 break; 1215 case lltok::less: // Either vector or packed struct. 1216 // TypeRec ::= '<' ... '>' 1217 Lex.Lex(); 1218 if (Lex.getKind() == lltok::lbrace) { 1219 if (ParseStructType(Result, true) || 1220 ParseToken(lltok::greater, "expected '>' at end of packed struct")) 1221 return true; 1222 } else if (ParseArrayVectorType(Result, true)) 1223 return true; 1224 break; 1225 case lltok::LocalVar: 1226 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0 1227 // TypeRec ::= %foo 1228 if (const Type *T = M->getTypeByName(Lex.getStrVal())) { 1229 Result = T; 1230 } else { 1231 Result = OpaqueType::get(Context); 1232 ForwardRefTypes.insert(std::make_pair(Lex.getStrVal(), 1233 std::make_pair(Result, 1234 Lex.getLoc()))); 1235 M->addTypeName(Lex.getStrVal(), Result.get()); 1236 } 1237 Lex.Lex(); 1238 break; 1239 1240 case lltok::LocalVarID: 1241 // TypeRec ::= %4 1242 if (Lex.getUIntVal() < NumberedTypes.size()) 1243 Result = NumberedTypes[Lex.getUIntVal()]; 1244 else { 1245 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 1246 I = ForwardRefTypeIDs.find(Lex.getUIntVal()); 1247 if (I != ForwardRefTypeIDs.end()) 1248 Result = I->second.first; 1249 else { 1250 Result = OpaqueType::get(Context); 1251 ForwardRefTypeIDs.insert(std::make_pair(Lex.getUIntVal(), 1252 std::make_pair(Result, 1253 Lex.getLoc()))); 1254 } 1255 } 1256 Lex.Lex(); 1257 break; 1258 case lltok::backslash: { 1259 // TypeRec ::= '\' 4 1260 Lex.Lex(); 1261 unsigned Val; 1262 if (ParseUInt32(Val)) return true; 1263 OpaqueType *OT = OpaqueType::get(Context); //Use temporary placeholder. 1264 UpRefs.push_back(UpRefRecord(Lex.getLoc(), Val, OT)); 1265 Result = OT; 1266 break; 1267 } 1268 } 1269 1270 // Parse the type suffixes. 1271 while (1) { 1272 switch (Lex.getKind()) { 1273 // End of type. 1274 default: return false; 1275 1276 // TypeRec ::= TypeRec '*' 1277 case lltok::star: 1278 if (Result.get()->isLabelTy()) 1279 return TokError("basic block pointers are invalid"); 1280 if (Result.get()->isVoidTy()) 1281 return TokError("pointers to void are invalid; use i8* instead"); 1282 if (!PointerType::isValidElementType(Result.get())) 1283 return TokError("pointer to this type is invalid"); 1284 Result = HandleUpRefs(PointerType::getUnqual(Result.get())); 1285 Lex.Lex(); 1286 break; 1287 1288 // TypeRec ::= TypeRec 'addrspace' '(' uint32 ')' '*' 1289 case lltok::kw_addrspace: { 1290 if (Result.get()->isLabelTy()) 1291 return TokError("basic block pointers are invalid"); 1292 if (Result.get()->isVoidTy()) 1293 return TokError("pointers to void are invalid; use i8* instead"); 1294 if (!PointerType::isValidElementType(Result.get())) 1295 return TokError("pointer to this type is invalid"); 1296 unsigned AddrSpace; 1297 if (ParseOptionalAddrSpace(AddrSpace) || 1298 ParseToken(lltok::star, "expected '*' in address space")) 1299 return true; 1300 1301 Result = HandleUpRefs(PointerType::get(Result.get(), AddrSpace)); 1302 break; 1303 } 1304 1305 /// Types '(' ArgTypeListI ')' OptFuncAttrs 1306 case lltok::lparen: 1307 if (ParseFunctionType(Result)) 1308 return true; 1309 break; 1310 } 1311 } 1312} 1313 1314/// ParseParameterList 1315/// ::= '(' ')' 1316/// ::= '(' Arg (',' Arg)* ')' 1317/// Arg 1318/// ::= Type OptionalAttributes Value OptionalAttributes 1319bool LLParser::ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList, 1320 PerFunctionState &PFS) { 1321 if (ParseToken(lltok::lparen, "expected '(' in call")) 1322 return true; 1323 1324 while (Lex.getKind() != lltok::rparen) { 1325 // If this isn't the first argument, we need a comma. 1326 if (!ArgList.empty() && 1327 ParseToken(lltok::comma, "expected ',' in argument list")) 1328 return true; 1329 1330 // Parse the argument. 1331 LocTy ArgLoc; 1332 PATypeHolder ArgTy(Type::getVoidTy(Context)); 1333 unsigned ArgAttrs1, ArgAttrs2; 1334 Value *V; 1335 if (ParseType(ArgTy, ArgLoc) || 1336 ParseOptionalAttrs(ArgAttrs1, 0) || 1337 ParseValue(ArgTy, V, PFS) || 1338 // FIXME: Should not allow attributes after the argument, remove this in 1339 // LLVM 3.0. 1340 ParseOptionalAttrs(ArgAttrs2, 3)) 1341 return true; 1342 ArgList.push_back(ParamInfo(ArgLoc, V, ArgAttrs1|ArgAttrs2)); 1343 } 1344 1345 Lex.Lex(); // Lex the ')'. 1346 return false; 1347} 1348 1349 1350 1351/// ParseArgumentList - Parse the argument list for a function type or function 1352/// prototype. If 'inType' is true then we are parsing a FunctionType. 1353/// ::= '(' ArgTypeListI ')' 1354/// ArgTypeListI 1355/// ::= /*empty*/ 1356/// ::= '...' 1357/// ::= ArgTypeList ',' '...' 1358/// ::= ArgType (',' ArgType)* 1359/// 1360bool LLParser::ParseArgumentList(std::vector<ArgInfo> &ArgList, 1361 bool &isVarArg, bool inType) { 1362 isVarArg = false; 1363 assert(Lex.getKind() == lltok::lparen); 1364 Lex.Lex(); // eat the (. 1365 1366 if (Lex.getKind() == lltok::rparen) { 1367 // empty 1368 } else if (Lex.getKind() == lltok::dotdotdot) { 1369 isVarArg = true; 1370 Lex.Lex(); 1371 } else { 1372 LocTy TypeLoc = Lex.getLoc(); 1373 PATypeHolder ArgTy(Type::getVoidTy(Context)); 1374 unsigned Attrs; 1375 std::string Name; 1376 1377 // If we're parsing a type, use ParseTypeRec, because we allow recursive 1378 // types (such as a function returning a pointer to itself). If parsing a 1379 // function prototype, we require fully resolved types. 1380 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1381 ParseOptionalAttrs(Attrs, 0)) return true; 1382 1383 if (ArgTy->isVoidTy()) 1384 return Error(TypeLoc, "argument can not have void type"); 1385 1386 if (Lex.getKind() == lltok::LocalVar || 1387 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1388 Name = Lex.getStrVal(); 1389 Lex.Lex(); 1390 } 1391 1392 if (!FunctionType::isValidArgumentType(ArgTy)) 1393 return Error(TypeLoc, "invalid type for function argument"); 1394 1395 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1396 1397 while (EatIfPresent(lltok::comma)) { 1398 // Handle ... at end of arg list. 1399 if (EatIfPresent(lltok::dotdotdot)) { 1400 isVarArg = true; 1401 break; 1402 } 1403 1404 // Otherwise must be an argument type. 1405 TypeLoc = Lex.getLoc(); 1406 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1407 ParseOptionalAttrs(Attrs, 0)) return true; 1408 1409 if (ArgTy->isVoidTy()) 1410 return Error(TypeLoc, "argument can not have void type"); 1411 1412 if (Lex.getKind() == lltok::LocalVar || 1413 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1414 Name = Lex.getStrVal(); 1415 Lex.Lex(); 1416 } else { 1417 Name = ""; 1418 } 1419 1420 if (!ArgTy->isFirstClassType() && !isa<OpaqueType>(ArgTy)) 1421 return Error(TypeLoc, "invalid type for function argument"); 1422 1423 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1424 } 1425 } 1426 1427 return ParseToken(lltok::rparen, "expected ')' at end of argument list"); 1428} 1429 1430/// ParseFunctionType 1431/// ::= Type ArgumentList OptionalAttrs 1432bool LLParser::ParseFunctionType(PATypeHolder &Result) { 1433 assert(Lex.getKind() == lltok::lparen); 1434 1435 if (!FunctionType::isValidReturnType(Result)) 1436 return TokError("invalid function return type"); 1437 1438 std::vector<ArgInfo> ArgList; 1439 bool isVarArg; 1440 unsigned Attrs; 1441 if (ParseArgumentList(ArgList, isVarArg, true) || 1442 // FIXME: Allow, but ignore attributes on function types! 1443 // FIXME: Remove in LLVM 3.0 1444 ParseOptionalAttrs(Attrs, 2)) 1445 return true; 1446 1447 // Reject names on the arguments lists. 1448 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 1449 if (!ArgList[i].Name.empty()) 1450 return Error(ArgList[i].Loc, "argument name invalid in function type"); 1451 if (!ArgList[i].Attrs != 0) { 1452 // Allow but ignore attributes on function types; this permits 1453 // auto-upgrade. 1454 // FIXME: REJECT ATTRIBUTES ON FUNCTION TYPES in LLVM 3.0 1455 } 1456 } 1457 1458 std::vector<const Type*> ArgListTy; 1459 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 1460 ArgListTy.push_back(ArgList[i].Type); 1461 1462 Result = HandleUpRefs(FunctionType::get(Result.get(), 1463 ArgListTy, isVarArg)); 1464 return false; 1465} 1466 1467/// ParseStructType: Handles packed and unpacked types. </> parsed elsewhere. 1468/// TypeRec 1469/// ::= '{' '}' 1470/// ::= '{' TypeRec (',' TypeRec)* '}' 1471/// ::= '<' '{' '}' '>' 1472/// ::= '<' '{' TypeRec (',' TypeRec)* '}' '>' 1473bool LLParser::ParseStructType(PATypeHolder &Result, bool Packed) { 1474 assert(Lex.getKind() == lltok::lbrace); 1475 Lex.Lex(); // Consume the '{' 1476 1477 if (EatIfPresent(lltok::rbrace)) { 1478 Result = StructType::get(Context, Packed); 1479 return false; 1480 } 1481 1482 std::vector<PATypeHolder> ParamsList; 1483 LocTy EltTyLoc = Lex.getLoc(); 1484 if (ParseTypeRec(Result)) return true; 1485 ParamsList.push_back(Result); 1486 1487 if (Result->isVoidTy()) 1488 return Error(EltTyLoc, "struct element can not have void type"); 1489 if (!StructType::isValidElementType(Result)) 1490 return Error(EltTyLoc, "invalid element type for struct"); 1491 1492 while (EatIfPresent(lltok::comma)) { 1493 EltTyLoc = Lex.getLoc(); 1494 if (ParseTypeRec(Result)) return true; 1495 1496 if (Result->isVoidTy()) 1497 return Error(EltTyLoc, "struct element can not have void type"); 1498 if (!StructType::isValidElementType(Result)) 1499 return Error(EltTyLoc, "invalid element type for struct"); 1500 1501 ParamsList.push_back(Result); 1502 } 1503 1504 if (ParseToken(lltok::rbrace, "expected '}' at end of struct")) 1505 return true; 1506 1507 std::vector<const Type*> ParamsListTy; 1508 for (unsigned i = 0, e = ParamsList.size(); i != e; ++i) 1509 ParamsListTy.push_back(ParamsList[i].get()); 1510 Result = HandleUpRefs(StructType::get(Context, ParamsListTy, Packed)); 1511 return false; 1512} 1513 1514/// ParseArrayVectorType - Parse an array or vector type, assuming the first 1515/// token has already been consumed. 1516/// TypeRec 1517/// ::= '[' APSINTVAL 'x' Types ']' 1518/// ::= '<' APSINTVAL 'x' Types '>' 1519bool LLParser::ParseArrayVectorType(PATypeHolder &Result, bool isVector) { 1520 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned() || 1521 Lex.getAPSIntVal().getBitWidth() > 64) 1522 return TokError("expected number in address space"); 1523 1524 LocTy SizeLoc = Lex.getLoc(); 1525 uint64_t Size = Lex.getAPSIntVal().getZExtValue(); 1526 Lex.Lex(); 1527 1528 if (ParseToken(lltok::kw_x, "expected 'x' after element count")) 1529 return true; 1530 1531 LocTy TypeLoc = Lex.getLoc(); 1532 PATypeHolder EltTy(Type::getVoidTy(Context)); 1533 if (ParseTypeRec(EltTy)) return true; 1534 1535 if (EltTy->isVoidTy()) 1536 return Error(TypeLoc, "array and vector element type cannot be void"); 1537 1538 if (ParseToken(isVector ? lltok::greater : lltok::rsquare, 1539 "expected end of sequential type")) 1540 return true; 1541 1542 if (isVector) { 1543 if (Size == 0) 1544 return Error(SizeLoc, "zero element vector is illegal"); 1545 if ((unsigned)Size != Size) 1546 return Error(SizeLoc, "size too large for vector"); 1547 if (!VectorType::isValidElementType(EltTy)) 1548 return Error(TypeLoc, "vector element type must be fp or integer"); 1549 Result = VectorType::get(EltTy, unsigned(Size)); 1550 } else { 1551 if (!ArrayType::isValidElementType(EltTy)) 1552 return Error(TypeLoc, "invalid array element type"); 1553 Result = HandleUpRefs(ArrayType::get(EltTy, Size)); 1554 } 1555 return false; 1556} 1557 1558//===----------------------------------------------------------------------===// 1559// Function Semantic Analysis. 1560//===----------------------------------------------------------------------===// 1561 1562LLParser::PerFunctionState::PerFunctionState(LLParser &p, Function &f) 1563 : P(p), F(f) { 1564 1565 // Insert unnamed arguments into the NumberedVals list. 1566 for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 1567 AI != E; ++AI) 1568 if (!AI->hasName()) 1569 NumberedVals.push_back(AI); 1570} 1571 1572LLParser::PerFunctionState::~PerFunctionState() { 1573 // If there were any forward referenced non-basicblock values, delete them. 1574 for (std::map<std::string, std::pair<Value*, LocTy> >::iterator 1575 I = ForwardRefVals.begin(), E = ForwardRefVals.end(); I != E; ++I) 1576 if (!isa<BasicBlock>(I->second.first)) { 1577 I->second.first->replaceAllUsesWith( 1578 UndefValue::get(I->second.first->getType())); 1579 delete I->second.first; 1580 I->second.first = 0; 1581 } 1582 1583 for (std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1584 I = ForwardRefValIDs.begin(), E = ForwardRefValIDs.end(); I != E; ++I) 1585 if (!isa<BasicBlock>(I->second.first)) { 1586 I->second.first->replaceAllUsesWith( 1587 UndefValue::get(I->second.first->getType())); 1588 delete I->second.first; 1589 I->second.first = 0; 1590 } 1591} 1592 1593bool LLParser::PerFunctionState::VerifyFunctionComplete() { 1594 if (!ForwardRefVals.empty()) 1595 return P.Error(ForwardRefVals.begin()->second.second, 1596 "use of undefined value '%" + ForwardRefVals.begin()->first + 1597 "'"); 1598 if (!ForwardRefValIDs.empty()) 1599 return P.Error(ForwardRefValIDs.begin()->second.second, 1600 "use of undefined value '%" + 1601 utostr(ForwardRefValIDs.begin()->first) + "'"); 1602 return false; 1603} 1604 1605 1606/// GetVal - Get a value with the specified name or ID, creating a 1607/// forward reference record if needed. This can return null if the value 1608/// exists but does not have the right type. 1609Value *LLParser::PerFunctionState::GetVal(const std::string &Name, 1610 const Type *Ty, LocTy Loc) { 1611 // Look this name up in the normal function symbol table. 1612 Value *Val = F.getValueSymbolTable().lookup(Name); 1613 1614 // If this is a forward reference for the value, see if we already created a 1615 // forward ref record. 1616 if (Val == 0) { 1617 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1618 I = ForwardRefVals.find(Name); 1619 if (I != ForwardRefVals.end()) 1620 Val = I->second.first; 1621 } 1622 1623 // If we have the value in the symbol table or fwd-ref table, return it. 1624 if (Val) { 1625 if (Val->getType() == Ty) return Val; 1626 if (Ty->isLabelTy()) 1627 P.Error(Loc, "'%" + Name + "' is not a basic block"); 1628 else 1629 P.Error(Loc, "'%" + Name + "' defined with type '" + 1630 Val->getType()->getDescription() + "'"); 1631 return 0; 1632 } 1633 1634 // Don't make placeholders with invalid type. 1635 if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty) && 1636 Ty != Type::getLabelTy(F.getContext())) { 1637 P.Error(Loc, "invalid use of a non-first-class type"); 1638 return 0; 1639 } 1640 1641 // Otherwise, create a new forward reference for this value and remember it. 1642 Value *FwdVal; 1643 if (Ty->isLabelTy()) 1644 FwdVal = BasicBlock::Create(F.getContext(), Name, &F); 1645 else 1646 FwdVal = new Argument(Ty, Name); 1647 1648 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 1649 return FwdVal; 1650} 1651 1652Value *LLParser::PerFunctionState::GetVal(unsigned ID, const Type *Ty, 1653 LocTy Loc) { 1654 // Look this name up in the normal function symbol table. 1655 Value *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 1656 1657 // If this is a forward reference for the value, see if we already created a 1658 // forward ref record. 1659 if (Val == 0) { 1660 std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1661 I = ForwardRefValIDs.find(ID); 1662 if (I != ForwardRefValIDs.end()) 1663 Val = I->second.first; 1664 } 1665 1666 // If we have the value in the symbol table or fwd-ref table, return it. 1667 if (Val) { 1668 if (Val->getType() == Ty) return Val; 1669 if (Ty->isLabelTy()) 1670 P.Error(Loc, "'%" + utostr(ID) + "' is not a basic block"); 1671 else 1672 P.Error(Loc, "'%" + utostr(ID) + "' defined with type '" + 1673 Val->getType()->getDescription() + "'"); 1674 return 0; 1675 } 1676 1677 if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty) && 1678 Ty != Type::getLabelTy(F.getContext())) { 1679 P.Error(Loc, "invalid use of a non-first-class type"); 1680 return 0; 1681 } 1682 1683 // Otherwise, create a new forward reference for this value and remember it. 1684 Value *FwdVal; 1685 if (Ty->isLabelTy()) 1686 FwdVal = BasicBlock::Create(F.getContext(), "", &F); 1687 else 1688 FwdVal = new Argument(Ty); 1689 1690 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 1691 return FwdVal; 1692} 1693 1694/// SetInstName - After an instruction is parsed and inserted into its 1695/// basic block, this installs its name. 1696bool LLParser::PerFunctionState::SetInstName(int NameID, 1697 const std::string &NameStr, 1698 LocTy NameLoc, Instruction *Inst) { 1699 // If this instruction has void type, it cannot have a name or ID specified. 1700 if (Inst->getType()->isVoidTy()) { 1701 if (NameID != -1 || !NameStr.empty()) 1702 return P.Error(NameLoc, "instructions returning void cannot have a name"); 1703 return false; 1704 } 1705 1706 // If this was a numbered instruction, verify that the instruction is the 1707 // expected value and resolve any forward references. 1708 if (NameStr.empty()) { 1709 // If neither a name nor an ID was specified, just use the next ID. 1710 if (NameID == -1) 1711 NameID = NumberedVals.size(); 1712 1713 if (unsigned(NameID) != NumberedVals.size()) 1714 return P.Error(NameLoc, "instruction expected to be numbered '%" + 1715 utostr(NumberedVals.size()) + "'"); 1716 1717 std::map<unsigned, std::pair<Value*, LocTy> >::iterator FI = 1718 ForwardRefValIDs.find(NameID); 1719 if (FI != ForwardRefValIDs.end()) { 1720 if (FI->second.first->getType() != Inst->getType()) 1721 return P.Error(NameLoc, "instruction forward referenced with type '" + 1722 FI->second.first->getType()->getDescription() + "'"); 1723 FI->second.first->replaceAllUsesWith(Inst); 1724 delete FI->second.first; 1725 ForwardRefValIDs.erase(FI); 1726 } 1727 1728 NumberedVals.push_back(Inst); 1729 return false; 1730 } 1731 1732 // Otherwise, the instruction had a name. Resolve forward refs and set it. 1733 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1734 FI = ForwardRefVals.find(NameStr); 1735 if (FI != ForwardRefVals.end()) { 1736 if (FI->second.first->getType() != Inst->getType()) 1737 return P.Error(NameLoc, "instruction forward referenced with type '" + 1738 FI->second.first->getType()->getDescription() + "'"); 1739 FI->second.first->replaceAllUsesWith(Inst); 1740 delete FI->second.first; 1741 ForwardRefVals.erase(FI); 1742 } 1743 1744 // Set the name on the instruction. 1745 Inst->setName(NameStr); 1746 1747 if (Inst->getNameStr() != NameStr) 1748 return P.Error(NameLoc, "multiple definition of local value named '" + 1749 NameStr + "'"); 1750 return false; 1751} 1752 1753/// GetBB - Get a basic block with the specified name or ID, creating a 1754/// forward reference record if needed. 1755BasicBlock *LLParser::PerFunctionState::GetBB(const std::string &Name, 1756 LocTy Loc) { 1757 return cast_or_null<BasicBlock>(GetVal(Name, 1758 Type::getLabelTy(F.getContext()), Loc)); 1759} 1760 1761BasicBlock *LLParser::PerFunctionState::GetBB(unsigned ID, LocTy Loc) { 1762 return cast_or_null<BasicBlock>(GetVal(ID, 1763 Type::getLabelTy(F.getContext()), Loc)); 1764} 1765 1766/// DefineBB - Define the specified basic block, which is either named or 1767/// unnamed. If there is an error, this returns null otherwise it returns 1768/// the block being defined. 1769BasicBlock *LLParser::PerFunctionState::DefineBB(const std::string &Name, 1770 LocTy Loc) { 1771 BasicBlock *BB; 1772 if (Name.empty()) 1773 BB = GetBB(NumberedVals.size(), Loc); 1774 else 1775 BB = GetBB(Name, Loc); 1776 if (BB == 0) return 0; // Already diagnosed error. 1777 1778 // Move the block to the end of the function. Forward ref'd blocks are 1779 // inserted wherever they happen to be referenced. 1780 F.getBasicBlockList().splice(F.end(), F.getBasicBlockList(), BB); 1781 1782 // Remove the block from forward ref sets. 1783 if (Name.empty()) { 1784 ForwardRefValIDs.erase(NumberedVals.size()); 1785 NumberedVals.push_back(BB); 1786 } else { 1787 // BB forward references are already in the function symbol table. 1788 ForwardRefVals.erase(Name); 1789 } 1790 1791 return BB; 1792} 1793 1794//===----------------------------------------------------------------------===// 1795// Constants. 1796//===----------------------------------------------------------------------===// 1797 1798/// ParseValID - Parse an abstract value that doesn't necessarily have a 1799/// type implied. For example, if we parse "4" we don't know what integer type 1800/// it has. The value will later be combined with its type and checked for 1801/// sanity. 1802bool LLParser::ParseValID(ValID &ID) { 1803 ID.Loc = Lex.getLoc(); 1804 switch (Lex.getKind()) { 1805 default: return TokError("expected value token"); 1806 case lltok::GlobalID: // @42 1807 ID.UIntVal = Lex.getUIntVal(); 1808 ID.Kind = ValID::t_GlobalID; 1809 break; 1810 case lltok::GlobalVar: // @foo 1811 ID.StrVal = Lex.getStrVal(); 1812 ID.Kind = ValID::t_GlobalName; 1813 break; 1814 case lltok::LocalVarID: // %42 1815 ID.UIntVal = Lex.getUIntVal(); 1816 ID.Kind = ValID::t_LocalID; 1817 break; 1818 case lltok::LocalVar: // %foo 1819 case lltok::StringConstant: // "foo" - FIXME: REMOVE IN LLVM 3.0 1820 ID.StrVal = Lex.getStrVal(); 1821 ID.Kind = ValID::t_LocalName; 1822 break; 1823 case lltok::Metadata: { // !{...} MDNode, !"foo" MDString 1824 ID.Kind = ValID::t_Metadata; 1825 Lex.Lex(); 1826 if (Lex.getKind() == lltok::lbrace) { 1827 SmallVector<Value*, 16> Elts; 1828 if (ParseMDNodeVector(Elts) || 1829 ParseToken(lltok::rbrace, "expected end of metadata node")) 1830 return true; 1831 1832 ID.MetadataVal = MDNode::get(Context, Elts.data(), Elts.size()); 1833 return false; 1834 } 1835 1836 // Standalone metadata reference 1837 // !{ ..., !42, ... } 1838 if (!ParseMDNode(ID.MetadataVal)) 1839 return false; 1840 1841 // MDString: 1842 // ::= '!' STRINGCONSTANT 1843 if (ParseMDString(ID.MetadataVal)) return true; 1844 ID.Kind = ValID::t_Metadata; 1845 return false; 1846 } 1847 case lltok::APSInt: 1848 ID.APSIntVal = Lex.getAPSIntVal(); 1849 ID.Kind = ValID::t_APSInt; 1850 break; 1851 case lltok::APFloat: 1852 ID.APFloatVal = Lex.getAPFloatVal(); 1853 ID.Kind = ValID::t_APFloat; 1854 break; 1855 case lltok::kw_true: 1856 ID.ConstantVal = ConstantInt::getTrue(Context); 1857 ID.Kind = ValID::t_Constant; 1858 break; 1859 case lltok::kw_false: 1860 ID.ConstantVal = ConstantInt::getFalse(Context); 1861 ID.Kind = ValID::t_Constant; 1862 break; 1863 case lltok::kw_null: ID.Kind = ValID::t_Null; break; 1864 case lltok::kw_undef: ID.Kind = ValID::t_Undef; break; 1865 case lltok::kw_zeroinitializer: ID.Kind = ValID::t_Zero; break; 1866 1867 case lltok::lbrace: { 1868 // ValID ::= '{' ConstVector '}' 1869 Lex.Lex(); 1870 SmallVector<Constant*, 16> Elts; 1871 if (ParseGlobalValueVector(Elts) || 1872 ParseToken(lltok::rbrace, "expected end of struct constant")) 1873 return true; 1874 1875 ID.ConstantVal = ConstantStruct::get(Context, Elts.data(), 1876 Elts.size(), false); 1877 ID.Kind = ValID::t_Constant; 1878 return false; 1879 } 1880 case lltok::less: { 1881 // ValID ::= '<' ConstVector '>' --> Vector. 1882 // ValID ::= '<' '{' ConstVector '}' '>' --> Packed Struct. 1883 Lex.Lex(); 1884 bool isPackedStruct = EatIfPresent(lltok::lbrace); 1885 1886 SmallVector<Constant*, 16> Elts; 1887 LocTy FirstEltLoc = Lex.getLoc(); 1888 if (ParseGlobalValueVector(Elts) || 1889 (isPackedStruct && 1890 ParseToken(lltok::rbrace, "expected end of packed struct")) || 1891 ParseToken(lltok::greater, "expected end of constant")) 1892 return true; 1893 1894 if (isPackedStruct) { 1895 ID.ConstantVal = 1896 ConstantStruct::get(Context, Elts.data(), Elts.size(), true); 1897 ID.Kind = ValID::t_Constant; 1898 return false; 1899 } 1900 1901 if (Elts.empty()) 1902 return Error(ID.Loc, "constant vector must not be empty"); 1903 1904 if (!Elts[0]->getType()->isInteger() && 1905 !Elts[0]->getType()->isFloatingPoint()) 1906 return Error(FirstEltLoc, 1907 "vector elements must have integer or floating point type"); 1908 1909 // Verify that all the vector elements have the same type. 1910 for (unsigned i = 1, e = Elts.size(); i != e; ++i) 1911 if (Elts[i]->getType() != Elts[0]->getType()) 1912 return Error(FirstEltLoc, 1913 "vector element #" + utostr(i) + 1914 " is not of type '" + Elts[0]->getType()->getDescription()); 1915 1916 ID.ConstantVal = ConstantVector::get(Elts.data(), Elts.size()); 1917 ID.Kind = ValID::t_Constant; 1918 return false; 1919 } 1920 case lltok::lsquare: { // Array Constant 1921 Lex.Lex(); 1922 SmallVector<Constant*, 16> Elts; 1923 LocTy FirstEltLoc = Lex.getLoc(); 1924 if (ParseGlobalValueVector(Elts) || 1925 ParseToken(lltok::rsquare, "expected end of array constant")) 1926 return true; 1927 1928 // Handle empty element. 1929 if (Elts.empty()) { 1930 // Use undef instead of an array because it's inconvenient to determine 1931 // the element type at this point, there being no elements to examine. 1932 ID.Kind = ValID::t_EmptyArray; 1933 return false; 1934 } 1935 1936 if (!Elts[0]->getType()->isFirstClassType()) 1937 return Error(FirstEltLoc, "invalid array element type: " + 1938 Elts[0]->getType()->getDescription()); 1939 1940 ArrayType *ATy = ArrayType::get(Elts[0]->getType(), Elts.size()); 1941 1942 // Verify all elements are correct type! 1943 for (unsigned i = 0, e = Elts.size(); i != e; ++i) { 1944 if (Elts[i]->getType() != Elts[0]->getType()) 1945 return Error(FirstEltLoc, 1946 "array element #" + utostr(i) + 1947 " is not of type '" +Elts[0]->getType()->getDescription()); 1948 } 1949 1950 ID.ConstantVal = ConstantArray::get(ATy, Elts.data(), Elts.size()); 1951 ID.Kind = ValID::t_Constant; 1952 return false; 1953 } 1954 case lltok::kw_c: // c "foo" 1955 Lex.Lex(); 1956 ID.ConstantVal = ConstantArray::get(Context, Lex.getStrVal(), false); 1957 if (ParseToken(lltok::StringConstant, "expected string")) return true; 1958 ID.Kind = ValID::t_Constant; 1959 return false; 1960 1961 case lltok::kw_asm: { 1962 // ValID ::= 'asm' SideEffect? STRINGCONSTANT ',' STRINGCONSTANT 1963 bool HasSideEffect; 1964 Lex.Lex(); 1965 if (ParseOptionalToken(lltok::kw_sideeffect, HasSideEffect) || 1966 ParseStringConstant(ID.StrVal) || 1967 ParseToken(lltok::comma, "expected comma in inline asm expression") || 1968 ParseToken(lltok::StringConstant, "expected constraint string")) 1969 return true; 1970 ID.StrVal2 = Lex.getStrVal(); 1971 ID.UIntVal = HasSideEffect; 1972 ID.Kind = ValID::t_InlineAsm; 1973 return false; 1974 } 1975 1976 case lltok::kw_trunc: 1977 case lltok::kw_zext: 1978 case lltok::kw_sext: 1979 case lltok::kw_fptrunc: 1980 case lltok::kw_fpext: 1981 case lltok::kw_bitcast: 1982 case lltok::kw_uitofp: 1983 case lltok::kw_sitofp: 1984 case lltok::kw_fptoui: 1985 case lltok::kw_fptosi: 1986 case lltok::kw_inttoptr: 1987 case lltok::kw_ptrtoint: { 1988 unsigned Opc = Lex.getUIntVal(); 1989 PATypeHolder DestTy(Type::getVoidTy(Context)); 1990 Constant *SrcVal; 1991 Lex.Lex(); 1992 if (ParseToken(lltok::lparen, "expected '(' after constantexpr cast") || 1993 ParseGlobalTypeAndValue(SrcVal) || 1994 ParseToken(lltok::kw_to, "expected 'to' in constantexpr cast") || 1995 ParseType(DestTy) || 1996 ParseToken(lltok::rparen, "expected ')' at end of constantexpr cast")) 1997 return true; 1998 if (!CastInst::castIsValid((Instruction::CastOps)Opc, SrcVal, DestTy)) 1999 return Error(ID.Loc, "invalid cast opcode for cast from '" + 2000 SrcVal->getType()->getDescription() + "' to '" + 2001 DestTy->getDescription() + "'"); 2002 ID.ConstantVal = ConstantExpr::getCast((Instruction::CastOps)Opc, 2003 SrcVal, DestTy); 2004 ID.Kind = ValID::t_Constant; 2005 return false; 2006 } 2007 case lltok::kw_extractvalue: { 2008 Lex.Lex(); 2009 Constant *Val; 2010 SmallVector<unsigned, 4> Indices; 2011 if (ParseToken(lltok::lparen, "expected '(' in extractvalue constantexpr")|| 2012 ParseGlobalTypeAndValue(Val) || 2013 ParseIndexList(Indices) || 2014 ParseToken(lltok::rparen, "expected ')' in extractvalue constantexpr")) 2015 return true; 2016 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 2017 return Error(ID.Loc, "extractvalue operand must be array or struct"); 2018 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 2019 Indices.end())) 2020 return Error(ID.Loc, "invalid indices for extractvalue"); 2021 ID.ConstantVal = 2022 ConstantExpr::getExtractValue(Val, Indices.data(), Indices.size()); 2023 ID.Kind = ValID::t_Constant; 2024 return false; 2025 } 2026 case lltok::kw_insertvalue: { 2027 Lex.Lex(); 2028 Constant *Val0, *Val1; 2029 SmallVector<unsigned, 4> Indices; 2030 if (ParseToken(lltok::lparen, "expected '(' in insertvalue constantexpr")|| 2031 ParseGlobalTypeAndValue(Val0) || 2032 ParseToken(lltok::comma, "expected comma in insertvalue constantexpr")|| 2033 ParseGlobalTypeAndValue(Val1) || 2034 ParseIndexList(Indices) || 2035 ParseToken(lltok::rparen, "expected ')' in insertvalue constantexpr")) 2036 return true; 2037 if (!isa<StructType>(Val0->getType()) && !isa<ArrayType>(Val0->getType())) 2038 return Error(ID.Loc, "extractvalue operand must be array or struct"); 2039 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 2040 Indices.end())) 2041 return Error(ID.Loc, "invalid indices for insertvalue"); 2042 ID.ConstantVal = ConstantExpr::getInsertValue(Val0, Val1, 2043 Indices.data(), Indices.size()); 2044 ID.Kind = ValID::t_Constant; 2045 return false; 2046 } 2047 case lltok::kw_icmp: 2048 case lltok::kw_fcmp: { 2049 unsigned PredVal, Opc = Lex.getUIntVal(); 2050 Constant *Val0, *Val1; 2051 Lex.Lex(); 2052 if (ParseCmpPredicate(PredVal, Opc) || 2053 ParseToken(lltok::lparen, "expected '(' in compare constantexpr") || 2054 ParseGlobalTypeAndValue(Val0) || 2055 ParseToken(lltok::comma, "expected comma in compare constantexpr") || 2056 ParseGlobalTypeAndValue(Val1) || 2057 ParseToken(lltok::rparen, "expected ')' in compare constantexpr")) 2058 return true; 2059 2060 if (Val0->getType() != Val1->getType()) 2061 return Error(ID.Loc, "compare operands must have the same type"); 2062 2063 CmpInst::Predicate Pred = (CmpInst::Predicate)PredVal; 2064 2065 if (Opc == Instruction::FCmp) { 2066 if (!Val0->getType()->isFPOrFPVector()) 2067 return Error(ID.Loc, "fcmp requires floating point operands"); 2068 ID.ConstantVal = ConstantExpr::getFCmp(Pred, Val0, Val1); 2069 } else { 2070 assert(Opc == Instruction::ICmp && "Unexpected opcode for CmpInst!"); 2071 if (!Val0->getType()->isIntOrIntVector() && 2072 !isa<PointerType>(Val0->getType())) 2073 return Error(ID.Loc, "icmp requires pointer or integer operands"); 2074 ID.ConstantVal = ConstantExpr::getICmp(Pred, Val0, Val1); 2075 } 2076 ID.Kind = ValID::t_Constant; 2077 return false; 2078 } 2079 2080 // Binary Operators. 2081 case lltok::kw_add: 2082 case lltok::kw_fadd: 2083 case lltok::kw_sub: 2084 case lltok::kw_fsub: 2085 case lltok::kw_mul: 2086 case lltok::kw_fmul: 2087 case lltok::kw_udiv: 2088 case lltok::kw_sdiv: 2089 case lltok::kw_fdiv: 2090 case lltok::kw_urem: 2091 case lltok::kw_srem: 2092 case lltok::kw_frem: { 2093 bool NUW = false; 2094 bool NSW = false; 2095 bool Exact = false; 2096 unsigned Opc = Lex.getUIntVal(); 2097 Constant *Val0, *Val1; 2098 Lex.Lex(); 2099 LocTy ModifierLoc = Lex.getLoc(); 2100 if (Opc == Instruction::Add || 2101 Opc == Instruction::Sub || 2102 Opc == Instruction::Mul) { 2103 if (EatIfPresent(lltok::kw_nuw)) 2104 NUW = true; 2105 if (EatIfPresent(lltok::kw_nsw)) { 2106 NSW = true; 2107 if (EatIfPresent(lltok::kw_nuw)) 2108 NUW = true; 2109 } 2110 } else if (Opc == Instruction::SDiv) { 2111 if (EatIfPresent(lltok::kw_exact)) 2112 Exact = true; 2113 } 2114 if (ParseToken(lltok::lparen, "expected '(' in binary constantexpr") || 2115 ParseGlobalTypeAndValue(Val0) || 2116 ParseToken(lltok::comma, "expected comma in binary constantexpr") || 2117 ParseGlobalTypeAndValue(Val1) || 2118 ParseToken(lltok::rparen, "expected ')' in binary constantexpr")) 2119 return true; 2120 if (Val0->getType() != Val1->getType()) 2121 return Error(ID.Loc, "operands of constexpr must have same type"); 2122 if (!Val0->getType()->isIntOrIntVector()) { 2123 if (NUW) 2124 return Error(ModifierLoc, "nuw only applies to integer operations"); 2125 if (NSW) 2126 return Error(ModifierLoc, "nsw only applies to integer operations"); 2127 } 2128 // API compatibility: Accept either integer or floating-point types with 2129 // add, sub, and mul. 2130 if (!Val0->getType()->isIntOrIntVector() && 2131 !Val0->getType()->isFPOrFPVector()) 2132 return Error(ID.Loc,"constexpr requires integer, fp, or vector operands"); 2133 unsigned Flags = 0; 2134 if (NUW) Flags |= OverflowingBinaryOperator::NoUnsignedWrap; 2135 if (NSW) Flags |= OverflowingBinaryOperator::NoSignedWrap; 2136 if (Exact) Flags |= SDivOperator::IsExact; 2137 Constant *C = ConstantExpr::get(Opc, Val0, Val1, Flags); 2138 ID.ConstantVal = C; 2139 ID.Kind = ValID::t_Constant; 2140 return false; 2141 } 2142 2143 // Logical Operations 2144 case lltok::kw_shl: 2145 case lltok::kw_lshr: 2146 case lltok::kw_ashr: 2147 case lltok::kw_and: 2148 case lltok::kw_or: 2149 case lltok::kw_xor: { 2150 unsigned Opc = Lex.getUIntVal(); 2151 Constant *Val0, *Val1; 2152 Lex.Lex(); 2153 if (ParseToken(lltok::lparen, "expected '(' in logical constantexpr") || 2154 ParseGlobalTypeAndValue(Val0) || 2155 ParseToken(lltok::comma, "expected comma in logical constantexpr") || 2156 ParseGlobalTypeAndValue(Val1) || 2157 ParseToken(lltok::rparen, "expected ')' in logical constantexpr")) 2158 return true; 2159 if (Val0->getType() != Val1->getType()) 2160 return Error(ID.Loc, "operands of constexpr must have same type"); 2161 if (!Val0->getType()->isIntOrIntVector()) 2162 return Error(ID.Loc, 2163 "constexpr requires integer or integer vector operands"); 2164 ID.ConstantVal = ConstantExpr::get(Opc, Val0, Val1); 2165 ID.Kind = ValID::t_Constant; 2166 return false; 2167 } 2168 2169 case lltok::kw_getelementptr: 2170 case lltok::kw_shufflevector: 2171 case lltok::kw_insertelement: 2172 case lltok::kw_extractelement: 2173 case lltok::kw_select: { 2174 unsigned Opc = Lex.getUIntVal(); 2175 SmallVector<Constant*, 16> Elts; 2176 bool InBounds = false; 2177 Lex.Lex(); 2178 if (Opc == Instruction::GetElementPtr) 2179 InBounds = EatIfPresent(lltok::kw_inbounds); 2180 if (ParseToken(lltok::lparen, "expected '(' in constantexpr") || 2181 ParseGlobalValueVector(Elts) || 2182 ParseToken(lltok::rparen, "expected ')' in constantexpr")) 2183 return true; 2184 2185 if (Opc == Instruction::GetElementPtr) { 2186 if (Elts.size() == 0 || !isa<PointerType>(Elts[0]->getType())) 2187 return Error(ID.Loc, "getelementptr requires pointer operand"); 2188 2189 if (!GetElementPtrInst::getIndexedType(Elts[0]->getType(), 2190 (Value**)(Elts.data() + 1), 2191 Elts.size() - 1)) 2192 return Error(ID.Loc, "invalid indices for getelementptr"); 2193 ID.ConstantVal = InBounds ? 2194 ConstantExpr::getInBoundsGetElementPtr(Elts[0], 2195 Elts.data() + 1, 2196 Elts.size() - 1) : 2197 ConstantExpr::getGetElementPtr(Elts[0], 2198 Elts.data() + 1, Elts.size() - 1); 2199 } else if (Opc == Instruction::Select) { 2200 if (Elts.size() != 3) 2201 return Error(ID.Loc, "expected three operands to select"); 2202 if (const char *Reason = SelectInst::areInvalidOperands(Elts[0], Elts[1], 2203 Elts[2])) 2204 return Error(ID.Loc, Reason); 2205 ID.ConstantVal = ConstantExpr::getSelect(Elts[0], Elts[1], Elts[2]); 2206 } else if (Opc == Instruction::ShuffleVector) { 2207 if (Elts.size() != 3) 2208 return Error(ID.Loc, "expected three operands to shufflevector"); 2209 if (!ShuffleVectorInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2210 return Error(ID.Loc, "invalid operands to shufflevector"); 2211 ID.ConstantVal = 2212 ConstantExpr::getShuffleVector(Elts[0], Elts[1],Elts[2]); 2213 } else if (Opc == Instruction::ExtractElement) { 2214 if (Elts.size() != 2) 2215 return Error(ID.Loc, "expected two operands to extractelement"); 2216 if (!ExtractElementInst::isValidOperands(Elts[0], Elts[1])) 2217 return Error(ID.Loc, "invalid extractelement operands"); 2218 ID.ConstantVal = ConstantExpr::getExtractElement(Elts[0], Elts[1]); 2219 } else { 2220 assert(Opc == Instruction::InsertElement && "Unknown opcode"); 2221 if (Elts.size() != 3) 2222 return Error(ID.Loc, "expected three operands to insertelement"); 2223 if (!InsertElementInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2224 return Error(ID.Loc, "invalid insertelement operands"); 2225 ID.ConstantVal = 2226 ConstantExpr::getInsertElement(Elts[0], Elts[1],Elts[2]); 2227 } 2228 2229 ID.Kind = ValID::t_Constant; 2230 return false; 2231 } 2232 } 2233 2234 Lex.Lex(); 2235 return false; 2236} 2237 2238/// ParseGlobalValue - Parse a global value with the specified type. 2239bool LLParser::ParseGlobalValue(const Type *Ty, Constant *&V) { 2240 V = 0; 2241 ValID ID; 2242 return ParseValID(ID) || 2243 ConvertGlobalValIDToValue(Ty, ID, V); 2244} 2245 2246/// ConvertGlobalValIDToValue - Apply a type to a ValID to get a fully resolved 2247/// constant. 2248bool LLParser::ConvertGlobalValIDToValue(const Type *Ty, ValID &ID, 2249 Constant *&V) { 2250 if (isa<FunctionType>(Ty)) 2251 return Error(ID.Loc, "functions are not values, refer to them as pointers"); 2252 2253 switch (ID.Kind) { 2254 default: llvm_unreachable("Unknown ValID!"); 2255 case ValID::t_Metadata: 2256 return Error(ID.Loc, "invalid use of metadata"); 2257 case ValID::t_LocalID: 2258 case ValID::t_LocalName: 2259 return Error(ID.Loc, "invalid use of function-local name"); 2260 case ValID::t_InlineAsm: 2261 return Error(ID.Loc, "inline asm can only be an operand of call/invoke"); 2262 case ValID::t_GlobalName: 2263 V = GetGlobalVal(ID.StrVal, Ty, ID.Loc); 2264 return V == 0; 2265 case ValID::t_GlobalID: 2266 V = GetGlobalVal(ID.UIntVal, Ty, ID.Loc); 2267 return V == 0; 2268 case ValID::t_APSInt: 2269 if (!isa<IntegerType>(Ty)) 2270 return Error(ID.Loc, "integer constant must have integer type"); 2271 ID.APSIntVal.extOrTrunc(Ty->getPrimitiveSizeInBits()); 2272 V = ConstantInt::get(Context, ID.APSIntVal); 2273 return false; 2274 case ValID::t_APFloat: 2275 if (!Ty->isFloatingPoint() || 2276 !ConstantFP::isValueValidForType(Ty, ID.APFloatVal)) 2277 return Error(ID.Loc, "floating point constant invalid for type"); 2278 2279 // The lexer has no type info, so builds all float and double FP constants 2280 // as double. Fix this here. Long double does not need this. 2281 if (&ID.APFloatVal.getSemantics() == &APFloat::IEEEdouble && 2282 Ty->isFloatTy()) { 2283 bool Ignored; 2284 ID.APFloatVal.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, 2285 &Ignored); 2286 } 2287 V = ConstantFP::get(Context, ID.APFloatVal); 2288 2289 if (V->getType() != Ty) 2290 return Error(ID.Loc, "floating point constant does not have type '" + 2291 Ty->getDescription() + "'"); 2292 2293 return false; 2294 case ValID::t_Null: 2295 if (!isa<PointerType>(Ty)) 2296 return Error(ID.Loc, "null must be a pointer type"); 2297 V = ConstantPointerNull::get(cast<PointerType>(Ty)); 2298 return false; 2299 case ValID::t_Undef: 2300 // FIXME: LabelTy should not be a first-class type. 2301 if ((!Ty->isFirstClassType() || Ty->isLabelTy()) && 2302 !isa<OpaqueType>(Ty)) 2303 return Error(ID.Loc, "invalid type for undef constant"); 2304 V = UndefValue::get(Ty); 2305 return false; 2306 case ValID::t_EmptyArray: 2307 if (!isa<ArrayType>(Ty) || cast<ArrayType>(Ty)->getNumElements() != 0) 2308 return Error(ID.Loc, "invalid empty array initializer"); 2309 V = UndefValue::get(Ty); 2310 return false; 2311 case ValID::t_Zero: 2312 // FIXME: LabelTy should not be a first-class type. 2313 if (!Ty->isFirstClassType() || Ty->isLabelTy()) 2314 return Error(ID.Loc, "invalid type for null constant"); 2315 V = Constant::getNullValue(Ty); 2316 return false; 2317 case ValID::t_Constant: 2318 if (ID.ConstantVal->getType() != Ty) 2319 return Error(ID.Loc, "constant expression type mismatch"); 2320 V = ID.ConstantVal; 2321 return false; 2322 } 2323} 2324 2325bool LLParser::ParseGlobalTypeAndValue(Constant *&V) { 2326 PATypeHolder Type(Type::getVoidTy(Context)); 2327 return ParseType(Type) || 2328 ParseGlobalValue(Type, V); 2329} 2330 2331/// ParseGlobalValueVector 2332/// ::= /*empty*/ 2333/// ::= TypeAndValue (',' TypeAndValue)* 2334bool LLParser::ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts) { 2335 // Empty list. 2336 if (Lex.getKind() == lltok::rbrace || 2337 Lex.getKind() == lltok::rsquare || 2338 Lex.getKind() == lltok::greater || 2339 Lex.getKind() == lltok::rparen) 2340 return false; 2341 2342 Constant *C; 2343 if (ParseGlobalTypeAndValue(C)) return true; 2344 Elts.push_back(C); 2345 2346 while (EatIfPresent(lltok::comma)) { 2347 if (ParseGlobalTypeAndValue(C)) return true; 2348 Elts.push_back(C); 2349 } 2350 2351 return false; 2352} 2353 2354 2355//===----------------------------------------------------------------------===// 2356// Function Parsing. 2357//===----------------------------------------------------------------------===// 2358 2359bool LLParser::ConvertValIDToValue(const Type *Ty, ValID &ID, Value *&V, 2360 PerFunctionState &PFS) { 2361 if (ID.Kind == ValID::t_LocalID) 2362 V = PFS.GetVal(ID.UIntVal, Ty, ID.Loc); 2363 else if (ID.Kind == ValID::t_LocalName) 2364 V = PFS.GetVal(ID.StrVal, Ty, ID.Loc); 2365 else if (ID.Kind == ValID::t_InlineAsm) { 2366 const PointerType *PTy = dyn_cast<PointerType>(Ty); 2367 const FunctionType *FTy = 2368 PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : 0; 2369 if (!FTy || !InlineAsm::Verify(FTy, ID.StrVal2)) 2370 return Error(ID.Loc, "invalid type for inline asm constraint string"); 2371 V = InlineAsm::get(FTy, ID.StrVal, ID.StrVal2, ID.UIntVal); 2372 return false; 2373 } else if (ID.Kind == ValID::t_Metadata) { 2374 V = ID.MetadataVal; 2375 } else { 2376 Constant *C; 2377 if (ConvertGlobalValIDToValue(Ty, ID, C)) return true; 2378 V = C; 2379 return false; 2380 } 2381 2382 return V == 0; 2383} 2384 2385bool LLParser::ParseValue(const Type *Ty, Value *&V, PerFunctionState &PFS) { 2386 V = 0; 2387 ValID ID; 2388 return ParseValID(ID) || 2389 ConvertValIDToValue(Ty, ID, V, PFS); 2390} 2391 2392bool LLParser::ParseTypeAndValue(Value *&V, PerFunctionState &PFS) { 2393 PATypeHolder T(Type::getVoidTy(Context)); 2394 return ParseType(T) || 2395 ParseValue(T, V, PFS); 2396} 2397 2398/// FunctionHeader 2399/// ::= OptionalLinkage OptionalVisibility OptionalCallingConv OptRetAttrs 2400/// Type GlobalName '(' ArgList ')' OptFuncAttrs OptSection 2401/// OptionalAlign OptGC 2402bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) { 2403 // Parse the linkage. 2404 LocTy LinkageLoc = Lex.getLoc(); 2405 unsigned Linkage; 2406 2407 unsigned Visibility, RetAttrs; 2408 CallingConv::ID CC; 2409 PATypeHolder RetType(Type::getVoidTy(Context)); 2410 LocTy RetTypeLoc = Lex.getLoc(); 2411 if (ParseOptionalLinkage(Linkage) || 2412 ParseOptionalVisibility(Visibility) || 2413 ParseOptionalCallingConv(CC) || 2414 ParseOptionalAttrs(RetAttrs, 1) || 2415 ParseType(RetType, RetTypeLoc, true /*void allowed*/)) 2416 return true; 2417 2418 // Verify that the linkage is ok. 2419 switch ((GlobalValue::LinkageTypes)Linkage) { 2420 case GlobalValue::ExternalLinkage: 2421 break; // always ok. 2422 case GlobalValue::DLLImportLinkage: 2423 case GlobalValue::ExternalWeakLinkage: 2424 if (isDefine) 2425 return Error(LinkageLoc, "invalid linkage for function definition"); 2426 break; 2427 case GlobalValue::PrivateLinkage: 2428 case GlobalValue::LinkerPrivateLinkage: 2429 case GlobalValue::InternalLinkage: 2430 case GlobalValue::AvailableExternallyLinkage: 2431 case GlobalValue::LinkOnceAnyLinkage: 2432 case GlobalValue::LinkOnceODRLinkage: 2433 case GlobalValue::WeakAnyLinkage: 2434 case GlobalValue::WeakODRLinkage: 2435 case GlobalValue::DLLExportLinkage: 2436 if (!isDefine) 2437 return Error(LinkageLoc, "invalid linkage for function declaration"); 2438 break; 2439 case GlobalValue::AppendingLinkage: 2440 case GlobalValue::GhostLinkage: 2441 case GlobalValue::CommonLinkage: 2442 return Error(LinkageLoc, "invalid function linkage type"); 2443 } 2444 2445 if (!FunctionType::isValidReturnType(RetType) || 2446 isa<OpaqueType>(RetType)) 2447 return Error(RetTypeLoc, "invalid function return type"); 2448 2449 LocTy NameLoc = Lex.getLoc(); 2450 2451 std::string FunctionName; 2452 if (Lex.getKind() == lltok::GlobalVar) { 2453 FunctionName = Lex.getStrVal(); 2454 } else if (Lex.getKind() == lltok::GlobalID) { // @42 is ok. 2455 unsigned NameID = Lex.getUIntVal(); 2456 2457 if (NameID != NumberedVals.size()) 2458 return TokError("function expected to be numbered '%" + 2459 utostr(NumberedVals.size()) + "'"); 2460 } else { 2461 return TokError("expected function name"); 2462 } 2463 2464 Lex.Lex(); 2465 2466 if (Lex.getKind() != lltok::lparen) 2467 return TokError("expected '(' in function argument list"); 2468 2469 std::vector<ArgInfo> ArgList; 2470 bool isVarArg; 2471 unsigned FuncAttrs; 2472 std::string Section; 2473 unsigned Alignment; 2474 std::string GC; 2475 2476 if (ParseArgumentList(ArgList, isVarArg, false) || 2477 ParseOptionalAttrs(FuncAttrs, 2) || 2478 (EatIfPresent(lltok::kw_section) && 2479 ParseStringConstant(Section)) || 2480 ParseOptionalAlignment(Alignment) || 2481 (EatIfPresent(lltok::kw_gc) && 2482 ParseStringConstant(GC))) 2483 return true; 2484 2485 // If the alignment was parsed as an attribute, move to the alignment field. 2486 if (FuncAttrs & Attribute::Alignment) { 2487 Alignment = Attribute::getAlignmentFromAttrs(FuncAttrs); 2488 FuncAttrs &= ~Attribute::Alignment; 2489 } 2490 2491 // Okay, if we got here, the function is syntactically valid. Convert types 2492 // and do semantic checks. 2493 std::vector<const Type*> ParamTypeList; 2494 SmallVector<AttributeWithIndex, 8> Attrs; 2495 // FIXME : In 3.0, stop accepting zext, sext and inreg as optional function 2496 // attributes. 2497 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 2498 if (FuncAttrs & ObsoleteFuncAttrs) { 2499 RetAttrs |= FuncAttrs & ObsoleteFuncAttrs; 2500 FuncAttrs &= ~ObsoleteFuncAttrs; 2501 } 2502 2503 if (RetAttrs != Attribute::None) 2504 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 2505 2506 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 2507 ParamTypeList.push_back(ArgList[i].Type); 2508 if (ArgList[i].Attrs != Attribute::None) 2509 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 2510 } 2511 2512 if (FuncAttrs != Attribute::None) 2513 Attrs.push_back(AttributeWithIndex::get(~0, FuncAttrs)); 2514 2515 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 2516 2517 if (PAL.paramHasAttr(1, Attribute::StructRet) && 2518 RetType != Type::getVoidTy(Context)) 2519 return Error(RetTypeLoc, "functions with 'sret' argument must return void"); 2520 2521 const FunctionType *FT = 2522 FunctionType::get(RetType, ParamTypeList, isVarArg); 2523 const PointerType *PFT = PointerType::getUnqual(FT); 2524 2525 Fn = 0; 2526 if (!FunctionName.empty()) { 2527 // If this was a definition of a forward reference, remove the definition 2528 // from the forward reference table and fill in the forward ref. 2529 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator FRVI = 2530 ForwardRefVals.find(FunctionName); 2531 if (FRVI != ForwardRefVals.end()) { 2532 Fn = M->getFunction(FunctionName); 2533 ForwardRefVals.erase(FRVI); 2534 } else if ((Fn = M->getFunction(FunctionName))) { 2535 // If this function already exists in the symbol table, then it is 2536 // multiply defined. We accept a few cases for old backwards compat. 2537 // FIXME: Remove this stuff for LLVM 3.0. 2538 if (Fn->getType() != PFT || Fn->getAttributes() != PAL || 2539 (!Fn->isDeclaration() && isDefine)) { 2540 // If the redefinition has different type or different attributes, 2541 // reject it. If both have bodies, reject it. 2542 return Error(NameLoc, "invalid redefinition of function '" + 2543 FunctionName + "'"); 2544 } else if (Fn->isDeclaration()) { 2545 // Make sure to strip off any argument names so we can't get conflicts. 2546 for (Function::arg_iterator AI = Fn->arg_begin(), AE = Fn->arg_end(); 2547 AI != AE; ++AI) 2548 AI->setName(""); 2549 } 2550 } 2551 2552 } else { 2553 // If this is a definition of a forward referenced function, make sure the 2554 // types agree. 2555 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator I 2556 = ForwardRefValIDs.find(NumberedVals.size()); 2557 if (I != ForwardRefValIDs.end()) { 2558 Fn = cast<Function>(I->second.first); 2559 if (Fn->getType() != PFT) 2560 return Error(NameLoc, "type of definition and forward reference of '@" + 2561 utostr(NumberedVals.size()) +"' disagree"); 2562 ForwardRefValIDs.erase(I); 2563 } 2564 } 2565 2566 if (Fn == 0) 2567 Fn = Function::Create(FT, GlobalValue::ExternalLinkage, FunctionName, M); 2568 else // Move the forward-reference to the correct spot in the module. 2569 M->getFunctionList().splice(M->end(), M->getFunctionList(), Fn); 2570 2571 if (FunctionName.empty()) 2572 NumberedVals.push_back(Fn); 2573 2574 Fn->setLinkage((GlobalValue::LinkageTypes)Linkage); 2575 Fn->setVisibility((GlobalValue::VisibilityTypes)Visibility); 2576 Fn->setCallingConv(CC); 2577 Fn->setAttributes(PAL); 2578 Fn->setAlignment(Alignment); 2579 Fn->setSection(Section); 2580 if (!GC.empty()) Fn->setGC(GC.c_str()); 2581 2582 // Add all of the arguments we parsed to the function. 2583 Function::arg_iterator ArgIt = Fn->arg_begin(); 2584 for (unsigned i = 0, e = ArgList.size(); i != e; ++i, ++ArgIt) { 2585 // If the argument has a name, insert it into the argument symbol table. 2586 if (ArgList[i].Name.empty()) continue; 2587 2588 // Set the name, if it conflicted, it will be auto-renamed. 2589 ArgIt->setName(ArgList[i].Name); 2590 2591 if (ArgIt->getNameStr() != ArgList[i].Name) 2592 return Error(ArgList[i].Loc, "redefinition of argument '%" + 2593 ArgList[i].Name + "'"); 2594 } 2595 2596 return false; 2597} 2598 2599 2600/// ParseFunctionBody 2601/// ::= '{' BasicBlock+ '}' 2602/// ::= 'begin' BasicBlock+ 'end' // FIXME: remove in LLVM 3.0 2603/// 2604bool LLParser::ParseFunctionBody(Function &Fn) { 2605 if (Lex.getKind() != lltok::lbrace && Lex.getKind() != lltok::kw_begin) 2606 return TokError("expected '{' in function body"); 2607 Lex.Lex(); // eat the {. 2608 2609 PerFunctionState PFS(*this, Fn); 2610 2611 while (Lex.getKind() != lltok::rbrace && Lex.getKind() != lltok::kw_end) 2612 if (ParseBasicBlock(PFS)) return true; 2613 2614 // Eat the }. 2615 Lex.Lex(); 2616 2617 // Verify function is ok. 2618 return PFS.VerifyFunctionComplete(); 2619} 2620 2621/// ParseBasicBlock 2622/// ::= LabelStr? Instruction* 2623bool LLParser::ParseBasicBlock(PerFunctionState &PFS) { 2624 // If this basic block starts out with a name, remember it. 2625 std::string Name; 2626 LocTy NameLoc = Lex.getLoc(); 2627 if (Lex.getKind() == lltok::LabelStr) { 2628 Name = Lex.getStrVal(); 2629 Lex.Lex(); 2630 } 2631 2632 BasicBlock *BB = PFS.DefineBB(Name, NameLoc); 2633 if (BB == 0) return true; 2634 2635 std::string NameStr; 2636 2637 // Parse the instructions in this block until we get a terminator. 2638 Instruction *Inst; 2639 do { 2640 // This instruction may have three possibilities for a name: a) none 2641 // specified, b) name specified "%foo =", c) number specified: "%4 =". 2642 LocTy NameLoc = Lex.getLoc(); 2643 int NameID = -1; 2644 NameStr = ""; 2645 2646 if (Lex.getKind() == lltok::LocalVarID) { 2647 NameID = Lex.getUIntVal(); 2648 Lex.Lex(); 2649 if (ParseToken(lltok::equal, "expected '=' after instruction id")) 2650 return true; 2651 } else if (Lex.getKind() == lltok::LocalVar || 2652 // FIXME: REMOVE IN LLVM 3.0 2653 Lex.getKind() == lltok::StringConstant) { 2654 NameStr = Lex.getStrVal(); 2655 Lex.Lex(); 2656 if (ParseToken(lltok::equal, "expected '=' after instruction name")) 2657 return true; 2658 } 2659 2660 if (ParseInstruction(Inst, BB, PFS)) return true; 2661 if (EatIfPresent(lltok::comma)) 2662 ParseOptionalCustomMetadata(); 2663 2664 // Set metadata attached with this instruction. 2665 MetadataContext &TheMetadata = M->getContext().getMetadata(); 2666 for (SmallVector<std::pair<unsigned, MDNode *>, 2>::iterator 2667 MDI = MDsOnInst.begin(), MDE = MDsOnInst.end(); MDI != MDE; ++MDI) 2668 TheMetadata.addMD(MDI->first, MDI->second, Inst); 2669 MDsOnInst.clear(); 2670 2671 BB->getInstList().push_back(Inst); 2672 2673 // Set the name on the instruction. 2674 if (PFS.SetInstName(NameID, NameStr, NameLoc, Inst)) return true; 2675 } while (!isa<TerminatorInst>(Inst)); 2676 2677 return false; 2678} 2679 2680//===----------------------------------------------------------------------===// 2681// Instruction Parsing. 2682//===----------------------------------------------------------------------===// 2683 2684/// ParseInstruction - Parse one of the many different instructions. 2685/// 2686bool LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB, 2687 PerFunctionState &PFS) { 2688 lltok::Kind Token = Lex.getKind(); 2689 if (Token == lltok::Eof) 2690 return TokError("found end of file when expecting more instructions"); 2691 LocTy Loc = Lex.getLoc(); 2692 unsigned KeywordVal = Lex.getUIntVal(); 2693 Lex.Lex(); // Eat the keyword. 2694 2695 switch (Token) { 2696 default: return Error(Loc, "expected instruction opcode"); 2697 // Terminator Instructions. 2698 case lltok::kw_unwind: Inst = new UnwindInst(Context); return false; 2699 case lltok::kw_unreachable: Inst = new UnreachableInst(Context); return false; 2700 case lltok::kw_ret: return ParseRet(Inst, BB, PFS); 2701 case lltok::kw_br: return ParseBr(Inst, PFS); 2702 case lltok::kw_switch: return ParseSwitch(Inst, PFS); 2703 case lltok::kw_invoke: return ParseInvoke(Inst, PFS); 2704 // Binary Operators. 2705 case lltok::kw_add: 2706 case lltok::kw_sub: 2707 case lltok::kw_mul: { 2708 bool NUW = false; 2709 bool NSW = false; 2710 LocTy ModifierLoc = Lex.getLoc(); 2711 if (EatIfPresent(lltok::kw_nuw)) 2712 NUW = true; 2713 if (EatIfPresent(lltok::kw_nsw)) { 2714 NSW = true; 2715 if (EatIfPresent(lltok::kw_nuw)) 2716 NUW = true; 2717 } 2718 // API compatibility: Accept either integer or floating-point types. 2719 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 0); 2720 if (!Result) { 2721 if (!Inst->getType()->isIntOrIntVector()) { 2722 if (NUW) 2723 return Error(ModifierLoc, "nuw only applies to integer operations"); 2724 if (NSW) 2725 return Error(ModifierLoc, "nsw only applies to integer operations"); 2726 } 2727 if (NUW) 2728 cast<BinaryOperator>(Inst)->setHasNoUnsignedWrap(true); 2729 if (NSW) 2730 cast<BinaryOperator>(Inst)->setHasNoSignedWrap(true); 2731 } 2732 return Result; 2733 } 2734 case lltok::kw_fadd: 2735 case lltok::kw_fsub: 2736 case lltok::kw_fmul: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2737 2738 case lltok::kw_sdiv: { 2739 bool Exact = false; 2740 if (EatIfPresent(lltok::kw_exact)) 2741 Exact = true; 2742 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 1); 2743 if (!Result) 2744 if (Exact) 2745 cast<BinaryOperator>(Inst)->setIsExact(true); 2746 return Result; 2747 } 2748 2749 case lltok::kw_udiv: 2750 case lltok::kw_urem: 2751 case lltok::kw_srem: return ParseArithmetic(Inst, PFS, KeywordVal, 1); 2752 case lltok::kw_fdiv: 2753 case lltok::kw_frem: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2754 case lltok::kw_shl: 2755 case lltok::kw_lshr: 2756 case lltok::kw_ashr: 2757 case lltok::kw_and: 2758 case lltok::kw_or: 2759 case lltok::kw_xor: return ParseLogical(Inst, PFS, KeywordVal); 2760 case lltok::kw_icmp: 2761 case lltok::kw_fcmp: return ParseCompare(Inst, PFS, KeywordVal); 2762 // Casts. 2763 case lltok::kw_trunc: 2764 case lltok::kw_zext: 2765 case lltok::kw_sext: 2766 case lltok::kw_fptrunc: 2767 case lltok::kw_fpext: 2768 case lltok::kw_bitcast: 2769 case lltok::kw_uitofp: 2770 case lltok::kw_sitofp: 2771 case lltok::kw_fptoui: 2772 case lltok::kw_fptosi: 2773 case lltok::kw_inttoptr: 2774 case lltok::kw_ptrtoint: return ParseCast(Inst, PFS, KeywordVal); 2775 // Other. 2776 case lltok::kw_select: return ParseSelect(Inst, PFS); 2777 case lltok::kw_va_arg: return ParseVA_Arg(Inst, PFS); 2778 case lltok::kw_extractelement: return ParseExtractElement(Inst, PFS); 2779 case lltok::kw_insertelement: return ParseInsertElement(Inst, PFS); 2780 case lltok::kw_shufflevector: return ParseShuffleVector(Inst, PFS); 2781 case lltok::kw_phi: return ParsePHI(Inst, PFS); 2782 case lltok::kw_call: return ParseCall(Inst, PFS, false); 2783 case lltok::kw_tail: return ParseCall(Inst, PFS, true); 2784 // Memory. 2785 case lltok::kw_alloca: 2786 case lltok::kw_malloc: return ParseAlloc(Inst, PFS, KeywordVal); 2787 case lltok::kw_free: return ParseFree(Inst, PFS); 2788 case lltok::kw_load: return ParseLoad(Inst, PFS, false); 2789 case lltok::kw_store: return ParseStore(Inst, PFS, false); 2790 case lltok::kw_volatile: 2791 if (EatIfPresent(lltok::kw_load)) 2792 return ParseLoad(Inst, PFS, true); 2793 else if (EatIfPresent(lltok::kw_store)) 2794 return ParseStore(Inst, PFS, true); 2795 else 2796 return TokError("expected 'load' or 'store'"); 2797 case lltok::kw_getresult: return ParseGetResult(Inst, PFS); 2798 case lltok::kw_getelementptr: return ParseGetElementPtr(Inst, PFS); 2799 case lltok::kw_extractvalue: return ParseExtractValue(Inst, PFS); 2800 case lltok::kw_insertvalue: return ParseInsertValue(Inst, PFS); 2801 } 2802} 2803 2804/// ParseCmpPredicate - Parse an integer or fp predicate, based on Kind. 2805bool LLParser::ParseCmpPredicate(unsigned &P, unsigned Opc) { 2806 if (Opc == Instruction::FCmp) { 2807 switch (Lex.getKind()) { 2808 default: TokError("expected fcmp predicate (e.g. 'oeq')"); 2809 case lltok::kw_oeq: P = CmpInst::FCMP_OEQ; break; 2810 case lltok::kw_one: P = CmpInst::FCMP_ONE; break; 2811 case lltok::kw_olt: P = CmpInst::FCMP_OLT; break; 2812 case lltok::kw_ogt: P = CmpInst::FCMP_OGT; break; 2813 case lltok::kw_ole: P = CmpInst::FCMP_OLE; break; 2814 case lltok::kw_oge: P = CmpInst::FCMP_OGE; break; 2815 case lltok::kw_ord: P = CmpInst::FCMP_ORD; break; 2816 case lltok::kw_uno: P = CmpInst::FCMP_UNO; break; 2817 case lltok::kw_ueq: P = CmpInst::FCMP_UEQ; break; 2818 case lltok::kw_une: P = CmpInst::FCMP_UNE; break; 2819 case lltok::kw_ult: P = CmpInst::FCMP_ULT; break; 2820 case lltok::kw_ugt: P = CmpInst::FCMP_UGT; break; 2821 case lltok::kw_ule: P = CmpInst::FCMP_ULE; break; 2822 case lltok::kw_uge: P = CmpInst::FCMP_UGE; break; 2823 case lltok::kw_true: P = CmpInst::FCMP_TRUE; break; 2824 case lltok::kw_false: P = CmpInst::FCMP_FALSE; break; 2825 } 2826 } else { 2827 switch (Lex.getKind()) { 2828 default: TokError("expected icmp predicate (e.g. 'eq')"); 2829 case lltok::kw_eq: P = CmpInst::ICMP_EQ; break; 2830 case lltok::kw_ne: P = CmpInst::ICMP_NE; break; 2831 case lltok::kw_slt: P = CmpInst::ICMP_SLT; break; 2832 case lltok::kw_sgt: P = CmpInst::ICMP_SGT; break; 2833 case lltok::kw_sle: P = CmpInst::ICMP_SLE; break; 2834 case lltok::kw_sge: P = CmpInst::ICMP_SGE; break; 2835 case lltok::kw_ult: P = CmpInst::ICMP_ULT; break; 2836 case lltok::kw_ugt: P = CmpInst::ICMP_UGT; break; 2837 case lltok::kw_ule: P = CmpInst::ICMP_ULE; break; 2838 case lltok::kw_uge: P = CmpInst::ICMP_UGE; break; 2839 } 2840 } 2841 Lex.Lex(); 2842 return false; 2843} 2844 2845//===----------------------------------------------------------------------===// 2846// Terminator Instructions. 2847//===----------------------------------------------------------------------===// 2848 2849/// ParseRet - Parse a return instruction. 2850/// ::= 'ret' void (',' !dbg, !1) 2851/// ::= 'ret' TypeAndValue (',' !dbg, !1) 2852/// ::= 'ret' TypeAndValue (',' TypeAndValue)+ (',' !dbg, !1) 2853/// [[obsolete: LLVM 3.0]] 2854bool LLParser::ParseRet(Instruction *&Inst, BasicBlock *BB, 2855 PerFunctionState &PFS) { 2856 PATypeHolder Ty(Type::getVoidTy(Context)); 2857 if (ParseType(Ty, true /*void allowed*/)) return true; 2858 2859 if (Ty->isVoidTy()) { 2860 if (EatIfPresent(lltok::comma)) 2861 if (ParseOptionalCustomMetadata()) return true; 2862 Inst = ReturnInst::Create(Context); 2863 return false; 2864 } 2865 2866 Value *RV; 2867 if (ParseValue(Ty, RV, PFS)) return true; 2868 2869 if (EatIfPresent(lltok::comma)) { 2870 // Parse optional custom metadata, e.g. !dbg 2871 if (Lex.getKind() == lltok::NamedOrCustomMD) { 2872 if (ParseOptionalCustomMetadata()) return true; 2873 } else { 2874 // The normal case is one return value. 2875 // FIXME: LLVM 3.0 remove MRV support for 'ret i32 1, i32 2', requiring use 2876 // of 'ret {i32,i32} {i32 1, i32 2}' 2877 SmallVector<Value*, 8> RVs; 2878 RVs.push_back(RV); 2879 2880 do { 2881 // If optional custom metadata, e.g. !dbg is seen then this is the 2882 // end of MRV. 2883 if (Lex.getKind() == lltok::NamedOrCustomMD) 2884 break; 2885 if (ParseTypeAndValue(RV, PFS)) return true; 2886 RVs.push_back(RV); 2887 } while (EatIfPresent(lltok::comma)); 2888 2889 RV = UndefValue::get(PFS.getFunction().getReturnType()); 2890 for (unsigned i = 0, e = RVs.size(); i != e; ++i) { 2891 Instruction *I = InsertValueInst::Create(RV, RVs[i], i, "mrv"); 2892 BB->getInstList().push_back(I); 2893 RV = I; 2894 } 2895 } 2896 } 2897 if (EatIfPresent(lltok::comma)) 2898 if (ParseOptionalCustomMetadata()) return true; 2899 2900 Inst = ReturnInst::Create(Context, RV); 2901 return false; 2902} 2903 2904 2905/// ParseBr 2906/// ::= 'br' TypeAndValue 2907/// ::= 'br' TypeAndValue ',' TypeAndValue ',' TypeAndValue 2908bool LLParser::ParseBr(Instruction *&Inst, PerFunctionState &PFS) { 2909 LocTy Loc, Loc2; 2910 Value *Op0, *Op1, *Op2; 2911 if (ParseTypeAndValue(Op0, Loc, PFS)) return true; 2912 2913 if (BasicBlock *BB = dyn_cast<BasicBlock>(Op0)) { 2914 Inst = BranchInst::Create(BB); 2915 return false; 2916 } 2917 2918 if (Op0->getType() != Type::getInt1Ty(Context)) 2919 return Error(Loc, "branch condition must have 'i1' type"); 2920 2921 if (ParseToken(lltok::comma, "expected ',' after branch condition") || 2922 ParseTypeAndValue(Op1, Loc, PFS) || 2923 ParseToken(lltok::comma, "expected ',' after true destination") || 2924 ParseTypeAndValue(Op2, Loc2, PFS)) 2925 return true; 2926 2927 if (!isa<BasicBlock>(Op1)) 2928 return Error(Loc, "true destination of branch must be a basic block"); 2929 if (!isa<BasicBlock>(Op2)) 2930 return Error(Loc2, "true destination of branch must be a basic block"); 2931 2932 Inst = BranchInst::Create(cast<BasicBlock>(Op1), cast<BasicBlock>(Op2), Op0); 2933 return false; 2934} 2935 2936/// ParseSwitch 2937/// Instruction 2938/// ::= 'switch' TypeAndValue ',' TypeAndValue '[' JumpTable ']' 2939/// JumpTable 2940/// ::= (TypeAndValue ',' TypeAndValue)* 2941bool LLParser::ParseSwitch(Instruction *&Inst, PerFunctionState &PFS) { 2942 LocTy CondLoc, BBLoc; 2943 Value *Cond, *DefaultBB; 2944 if (ParseTypeAndValue(Cond, CondLoc, PFS) || 2945 ParseToken(lltok::comma, "expected ',' after switch condition") || 2946 ParseTypeAndValue(DefaultBB, BBLoc, PFS) || 2947 ParseToken(lltok::lsquare, "expected '[' with switch table")) 2948 return true; 2949 2950 if (!isa<IntegerType>(Cond->getType())) 2951 return Error(CondLoc, "switch condition must have integer type"); 2952 if (!isa<BasicBlock>(DefaultBB)) 2953 return Error(BBLoc, "default destination must be a basic block"); 2954 2955 // Parse the jump table pairs. 2956 SmallPtrSet<Value*, 32> SeenCases; 2957 SmallVector<std::pair<ConstantInt*, BasicBlock*>, 32> Table; 2958 while (Lex.getKind() != lltok::rsquare) { 2959 Value *Constant, *DestBB; 2960 2961 if (ParseTypeAndValue(Constant, CondLoc, PFS) || 2962 ParseToken(lltok::comma, "expected ',' after case value") || 2963 ParseTypeAndValue(DestBB, BBLoc, PFS)) 2964 return true; 2965 2966 if (!SeenCases.insert(Constant)) 2967 return Error(CondLoc, "duplicate case value in switch"); 2968 if (!isa<ConstantInt>(Constant)) 2969 return Error(CondLoc, "case value is not a constant integer"); 2970 if (!isa<BasicBlock>(DestBB)) 2971 return Error(BBLoc, "case destination is not a basic block"); 2972 2973 Table.push_back(std::make_pair(cast<ConstantInt>(Constant), 2974 cast<BasicBlock>(DestBB))); 2975 } 2976 2977 Lex.Lex(); // Eat the ']'. 2978 2979 SwitchInst *SI = SwitchInst::Create(Cond, cast<BasicBlock>(DefaultBB), 2980 Table.size()); 2981 for (unsigned i = 0, e = Table.size(); i != e; ++i) 2982 SI->addCase(Table[i].first, Table[i].second); 2983 Inst = SI; 2984 return false; 2985} 2986 2987/// ParseInvoke 2988/// ::= 'invoke' OptionalCallingConv OptionalAttrs Type Value ParamList 2989/// OptionalAttrs 'to' TypeAndValue 'unwind' TypeAndValue 2990bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) { 2991 LocTy CallLoc = Lex.getLoc(); 2992 unsigned RetAttrs, FnAttrs; 2993 CallingConv::ID CC; 2994 PATypeHolder RetType(Type::getVoidTy(Context)); 2995 LocTy RetTypeLoc; 2996 ValID CalleeID; 2997 SmallVector<ParamInfo, 16> ArgList; 2998 2999 Value *NormalBB, *UnwindBB; 3000 if (ParseOptionalCallingConv(CC) || 3001 ParseOptionalAttrs(RetAttrs, 1) || 3002 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3003 ParseValID(CalleeID) || 3004 ParseParameterList(ArgList, PFS) || 3005 ParseOptionalAttrs(FnAttrs, 2) || 3006 ParseToken(lltok::kw_to, "expected 'to' in invoke") || 3007 ParseTypeAndValue(NormalBB, PFS) || 3008 ParseToken(lltok::kw_unwind, "expected 'unwind' in invoke") || 3009 ParseTypeAndValue(UnwindBB, PFS)) 3010 return true; 3011 3012 if (!isa<BasicBlock>(NormalBB)) 3013 return Error(CallLoc, "normal destination is not a basic block"); 3014 if (!isa<BasicBlock>(UnwindBB)) 3015 return Error(CallLoc, "unwind destination is not a basic block"); 3016 3017 // If RetType is a non-function pointer type, then this is the short syntax 3018 // for the call, which means that RetType is just the return type. Infer the 3019 // rest of the function argument types from the arguments that are present. 3020 const PointerType *PFTy = 0; 3021 const FunctionType *Ty = 0; 3022 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3023 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3024 // Pull out the types of all of the arguments... 3025 std::vector<const Type*> ParamTypes; 3026 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3027 ParamTypes.push_back(ArgList[i].V->getType()); 3028 3029 if (!FunctionType::isValidReturnType(RetType)) 3030 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3031 3032 Ty = FunctionType::get(RetType, ParamTypes, false); 3033 PFTy = PointerType::getUnqual(Ty); 3034 } 3035 3036 // Look up the callee. 3037 Value *Callee; 3038 if (ConvertValIDToValue(PFTy, CalleeID, Callee, PFS)) return true; 3039 3040 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 3041 // function attributes. 3042 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 3043 if (FnAttrs & ObsoleteFuncAttrs) { 3044 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 3045 FnAttrs &= ~ObsoleteFuncAttrs; 3046 } 3047 3048 // Set up the Attributes for the function. 3049 SmallVector<AttributeWithIndex, 8> Attrs; 3050 if (RetAttrs != Attribute::None) 3051 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3052 3053 SmallVector<Value*, 8> Args; 3054 3055 // Loop through FunctionType's arguments and ensure they are specified 3056 // correctly. Also, gather any parameter attributes. 3057 FunctionType::param_iterator I = Ty->param_begin(); 3058 FunctionType::param_iterator E = Ty->param_end(); 3059 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3060 const Type *ExpectedTy = 0; 3061 if (I != E) { 3062 ExpectedTy = *I++; 3063 } else if (!Ty->isVarArg()) { 3064 return Error(ArgList[i].Loc, "too many arguments specified"); 3065 } 3066 3067 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3068 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3069 ExpectedTy->getDescription() + "'"); 3070 Args.push_back(ArgList[i].V); 3071 if (ArgList[i].Attrs != Attribute::None) 3072 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3073 } 3074 3075 if (I != E) 3076 return Error(CallLoc, "not enough parameters specified for call"); 3077 3078 if (FnAttrs != Attribute::None) 3079 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3080 3081 // Finish off the Attributes and check them 3082 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3083 3084 InvokeInst *II = InvokeInst::Create(Callee, cast<BasicBlock>(NormalBB), 3085 cast<BasicBlock>(UnwindBB), 3086 Args.begin(), Args.end()); 3087 II->setCallingConv(CC); 3088 II->setAttributes(PAL); 3089 Inst = II; 3090 return false; 3091} 3092 3093 3094 3095//===----------------------------------------------------------------------===// 3096// Binary Operators. 3097//===----------------------------------------------------------------------===// 3098 3099/// ParseArithmetic 3100/// ::= ArithmeticOps TypeAndValue ',' Value 3101/// 3102/// If OperandType is 0, then any FP or integer operand is allowed. If it is 1, 3103/// then any integer operand is allowed, if it is 2, any fp operand is allowed. 3104bool LLParser::ParseArithmetic(Instruction *&Inst, PerFunctionState &PFS, 3105 unsigned Opc, unsigned OperandType) { 3106 LocTy Loc; Value *LHS, *RHS; 3107 if (ParseTypeAndValue(LHS, Loc, PFS) || 3108 ParseToken(lltok::comma, "expected ',' in arithmetic operation") || 3109 ParseValue(LHS->getType(), RHS, PFS)) 3110 return true; 3111 3112 bool Valid; 3113 switch (OperandType) { 3114 default: llvm_unreachable("Unknown operand type!"); 3115 case 0: // int or FP. 3116 Valid = LHS->getType()->isIntOrIntVector() || 3117 LHS->getType()->isFPOrFPVector(); 3118 break; 3119 case 1: Valid = LHS->getType()->isIntOrIntVector(); break; 3120 case 2: Valid = LHS->getType()->isFPOrFPVector(); break; 3121 } 3122 3123 if (!Valid) 3124 return Error(Loc, "invalid operand type for instruction"); 3125 3126 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3127 return false; 3128} 3129 3130/// ParseLogical 3131/// ::= ArithmeticOps TypeAndValue ',' Value { 3132bool LLParser::ParseLogical(Instruction *&Inst, PerFunctionState &PFS, 3133 unsigned Opc) { 3134 LocTy Loc; Value *LHS, *RHS; 3135 if (ParseTypeAndValue(LHS, Loc, PFS) || 3136 ParseToken(lltok::comma, "expected ',' in logical operation") || 3137 ParseValue(LHS->getType(), RHS, PFS)) 3138 return true; 3139 3140 if (!LHS->getType()->isIntOrIntVector()) 3141 return Error(Loc,"instruction requires integer or integer vector operands"); 3142 3143 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3144 return false; 3145} 3146 3147 3148/// ParseCompare 3149/// ::= 'icmp' IPredicates TypeAndValue ',' Value 3150/// ::= 'fcmp' FPredicates TypeAndValue ',' Value 3151bool LLParser::ParseCompare(Instruction *&Inst, PerFunctionState &PFS, 3152 unsigned Opc) { 3153 // Parse the integer/fp comparison predicate. 3154 LocTy Loc; 3155 unsigned Pred; 3156 Value *LHS, *RHS; 3157 if (ParseCmpPredicate(Pred, Opc) || 3158 ParseTypeAndValue(LHS, Loc, PFS) || 3159 ParseToken(lltok::comma, "expected ',' after compare value") || 3160 ParseValue(LHS->getType(), RHS, PFS)) 3161 return true; 3162 3163 if (Opc == Instruction::FCmp) { 3164 if (!LHS->getType()->isFPOrFPVector()) 3165 return Error(Loc, "fcmp requires floating point operands"); 3166 Inst = new FCmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3167 } else { 3168 assert(Opc == Instruction::ICmp && "Unknown opcode for CmpInst!"); 3169 if (!LHS->getType()->isIntOrIntVector() && 3170 !isa<PointerType>(LHS->getType())) 3171 return Error(Loc, "icmp requires integer operands"); 3172 Inst = new ICmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3173 } 3174 return false; 3175} 3176 3177//===----------------------------------------------------------------------===// 3178// Other Instructions. 3179//===----------------------------------------------------------------------===// 3180 3181 3182/// ParseCast 3183/// ::= CastOpc TypeAndValue 'to' Type 3184bool LLParser::ParseCast(Instruction *&Inst, PerFunctionState &PFS, 3185 unsigned Opc) { 3186 LocTy Loc; Value *Op; 3187 PATypeHolder DestTy(Type::getVoidTy(Context)); 3188 if (ParseTypeAndValue(Op, Loc, PFS) || 3189 ParseToken(lltok::kw_to, "expected 'to' after cast value") || 3190 ParseType(DestTy)) 3191 return true; 3192 3193 if (!CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy)) { 3194 CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy); 3195 return Error(Loc, "invalid cast opcode for cast from '" + 3196 Op->getType()->getDescription() + "' to '" + 3197 DestTy->getDescription() + "'"); 3198 } 3199 Inst = CastInst::Create((Instruction::CastOps)Opc, Op, DestTy); 3200 return false; 3201} 3202 3203/// ParseSelect 3204/// ::= 'select' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3205bool LLParser::ParseSelect(Instruction *&Inst, PerFunctionState &PFS) { 3206 LocTy Loc; 3207 Value *Op0, *Op1, *Op2; 3208 if (ParseTypeAndValue(Op0, Loc, PFS) || 3209 ParseToken(lltok::comma, "expected ',' after select condition") || 3210 ParseTypeAndValue(Op1, PFS) || 3211 ParseToken(lltok::comma, "expected ',' after select value") || 3212 ParseTypeAndValue(Op2, PFS)) 3213 return true; 3214 3215 if (const char *Reason = SelectInst::areInvalidOperands(Op0, Op1, Op2)) 3216 return Error(Loc, Reason); 3217 3218 Inst = SelectInst::Create(Op0, Op1, Op2); 3219 return false; 3220} 3221 3222/// ParseVA_Arg 3223/// ::= 'va_arg' TypeAndValue ',' Type 3224bool LLParser::ParseVA_Arg(Instruction *&Inst, PerFunctionState &PFS) { 3225 Value *Op; 3226 PATypeHolder EltTy(Type::getVoidTy(Context)); 3227 LocTy TypeLoc; 3228 if (ParseTypeAndValue(Op, PFS) || 3229 ParseToken(lltok::comma, "expected ',' after vaarg operand") || 3230 ParseType(EltTy, TypeLoc)) 3231 return true; 3232 3233 if (!EltTy->isFirstClassType()) 3234 return Error(TypeLoc, "va_arg requires operand with first class type"); 3235 3236 Inst = new VAArgInst(Op, EltTy); 3237 return false; 3238} 3239 3240/// ParseExtractElement 3241/// ::= 'extractelement' TypeAndValue ',' TypeAndValue 3242bool LLParser::ParseExtractElement(Instruction *&Inst, PerFunctionState &PFS) { 3243 LocTy Loc; 3244 Value *Op0, *Op1; 3245 if (ParseTypeAndValue(Op0, Loc, PFS) || 3246 ParseToken(lltok::comma, "expected ',' after extract value") || 3247 ParseTypeAndValue(Op1, PFS)) 3248 return true; 3249 3250 if (!ExtractElementInst::isValidOperands(Op0, Op1)) 3251 return Error(Loc, "invalid extractelement operands"); 3252 3253 Inst = ExtractElementInst::Create(Op0, Op1); 3254 return false; 3255} 3256 3257/// ParseInsertElement 3258/// ::= 'insertelement' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3259bool LLParser::ParseInsertElement(Instruction *&Inst, PerFunctionState &PFS) { 3260 LocTy Loc; 3261 Value *Op0, *Op1, *Op2; 3262 if (ParseTypeAndValue(Op0, Loc, PFS) || 3263 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3264 ParseTypeAndValue(Op1, PFS) || 3265 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3266 ParseTypeAndValue(Op2, PFS)) 3267 return true; 3268 3269 if (!InsertElementInst::isValidOperands(Op0, Op1, Op2)) 3270 return Error(Loc, "invalid insertelement operands"); 3271 3272 Inst = InsertElementInst::Create(Op0, Op1, Op2); 3273 return false; 3274} 3275 3276/// ParseShuffleVector 3277/// ::= 'shufflevector' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3278bool LLParser::ParseShuffleVector(Instruction *&Inst, PerFunctionState &PFS) { 3279 LocTy Loc; 3280 Value *Op0, *Op1, *Op2; 3281 if (ParseTypeAndValue(Op0, Loc, PFS) || 3282 ParseToken(lltok::comma, "expected ',' after shuffle mask") || 3283 ParseTypeAndValue(Op1, PFS) || 3284 ParseToken(lltok::comma, "expected ',' after shuffle value") || 3285 ParseTypeAndValue(Op2, PFS)) 3286 return true; 3287 3288 if (!ShuffleVectorInst::isValidOperands(Op0, Op1, Op2)) 3289 return Error(Loc, "invalid extractelement operands"); 3290 3291 Inst = new ShuffleVectorInst(Op0, Op1, Op2); 3292 return false; 3293} 3294 3295/// ParsePHI 3296/// ::= 'phi' Type '[' Value ',' Value ']' (',' '[' Value ',' Valueß ']')* 3297bool LLParser::ParsePHI(Instruction *&Inst, PerFunctionState &PFS) { 3298 PATypeHolder Ty(Type::getVoidTy(Context)); 3299 Value *Op0, *Op1; 3300 LocTy TypeLoc = Lex.getLoc(); 3301 3302 if (ParseType(Ty) || 3303 ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3304 ParseValue(Ty, Op0, PFS) || 3305 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3306 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3307 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3308 return true; 3309 3310 SmallVector<std::pair<Value*, BasicBlock*>, 16> PHIVals; 3311 while (1) { 3312 PHIVals.push_back(std::make_pair(Op0, cast<BasicBlock>(Op1))); 3313 3314 if (!EatIfPresent(lltok::comma)) 3315 break; 3316 3317 if (ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3318 ParseValue(Ty, Op0, PFS) || 3319 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3320 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3321 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3322 return true; 3323 } 3324 3325 if (!Ty->isFirstClassType()) 3326 return Error(TypeLoc, "phi node must have first class type"); 3327 3328 PHINode *PN = PHINode::Create(Ty); 3329 PN->reserveOperandSpace(PHIVals.size()); 3330 for (unsigned i = 0, e = PHIVals.size(); i != e; ++i) 3331 PN->addIncoming(PHIVals[i].first, PHIVals[i].second); 3332 Inst = PN; 3333 return false; 3334} 3335 3336/// ParseCall 3337/// ::= 'tail'? 'call' OptionalCallingConv OptionalAttrs Type Value 3338/// ParameterList OptionalAttrs 3339bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS, 3340 bool isTail) { 3341 unsigned RetAttrs, FnAttrs; 3342 CallingConv::ID CC; 3343 PATypeHolder RetType(Type::getVoidTy(Context)); 3344 LocTy RetTypeLoc; 3345 ValID CalleeID; 3346 SmallVector<ParamInfo, 16> ArgList; 3347 LocTy CallLoc = Lex.getLoc(); 3348 3349 if ((isTail && ParseToken(lltok::kw_call, "expected 'tail call'")) || 3350 ParseOptionalCallingConv(CC) || 3351 ParseOptionalAttrs(RetAttrs, 1) || 3352 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3353 ParseValID(CalleeID) || 3354 ParseParameterList(ArgList, PFS) || 3355 ParseOptionalAttrs(FnAttrs, 2)) 3356 return true; 3357 3358 // If RetType is a non-function pointer type, then this is the short syntax 3359 // for the call, which means that RetType is just the return type. Infer the 3360 // rest of the function argument types from the arguments that are present. 3361 const PointerType *PFTy = 0; 3362 const FunctionType *Ty = 0; 3363 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3364 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3365 // Pull out the types of all of the arguments... 3366 std::vector<const Type*> ParamTypes; 3367 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3368 ParamTypes.push_back(ArgList[i].V->getType()); 3369 3370 if (!FunctionType::isValidReturnType(RetType)) 3371 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3372 3373 Ty = FunctionType::get(RetType, ParamTypes, false); 3374 PFTy = PointerType::getUnqual(Ty); 3375 } 3376 3377 // Look up the callee. 3378 Value *Callee; 3379 if (ConvertValIDToValue(PFTy, CalleeID, Callee, PFS)) return true; 3380 3381 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 3382 // function attributes. 3383 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 3384 if (FnAttrs & ObsoleteFuncAttrs) { 3385 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 3386 FnAttrs &= ~ObsoleteFuncAttrs; 3387 } 3388 3389 // Set up the Attributes for the function. 3390 SmallVector<AttributeWithIndex, 8> Attrs; 3391 if (RetAttrs != Attribute::None) 3392 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3393 3394 SmallVector<Value*, 8> Args; 3395 3396 // Loop through FunctionType's arguments and ensure they are specified 3397 // correctly. Also, gather any parameter attributes. 3398 FunctionType::param_iterator I = Ty->param_begin(); 3399 FunctionType::param_iterator E = Ty->param_end(); 3400 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3401 const Type *ExpectedTy = 0; 3402 if (I != E) { 3403 ExpectedTy = *I++; 3404 } else if (!Ty->isVarArg()) { 3405 return Error(ArgList[i].Loc, "too many arguments specified"); 3406 } 3407 3408 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3409 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3410 ExpectedTy->getDescription() + "'"); 3411 Args.push_back(ArgList[i].V); 3412 if (ArgList[i].Attrs != Attribute::None) 3413 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3414 } 3415 3416 if (I != E) 3417 return Error(CallLoc, "not enough parameters specified for call"); 3418 3419 if (FnAttrs != Attribute::None) 3420 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3421 3422 // Finish off the Attributes and check them 3423 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3424 3425 CallInst *CI = CallInst::Create(Callee, Args.begin(), Args.end()); 3426 CI->setTailCall(isTail); 3427 CI->setCallingConv(CC); 3428 CI->setAttributes(PAL); 3429 Inst = CI; 3430 return false; 3431} 3432 3433//===----------------------------------------------------------------------===// 3434// Memory Instructions. 3435//===----------------------------------------------------------------------===// 3436 3437/// ParseAlloc 3438/// ::= 'malloc' Type (',' TypeAndValue)? (',' OptionalInfo)? 3439/// ::= 'alloca' Type (',' TypeAndValue)? (',' OptionalInfo)? 3440bool LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS, 3441 unsigned Opc) { 3442 PATypeHolder Ty(Type::getVoidTy(Context)); 3443 Value *Size = 0; 3444 LocTy SizeLoc; 3445 unsigned Alignment = 0; 3446 if (ParseType(Ty)) return true; 3447 3448 if (EatIfPresent(lltok::comma)) { 3449 if (Lex.getKind() == lltok::kw_align 3450 || Lex.getKind() == lltok::NamedOrCustomMD) { 3451 if (ParseOptionalInfo(Alignment)) return true; 3452 } else { 3453 if (ParseTypeAndValue(Size, SizeLoc, PFS)) return true; 3454 if (EatIfPresent(lltok::comma)) 3455 if (ParseOptionalInfo(Alignment)) return true; 3456 } 3457 } 3458 3459 if (Size && Size->getType() != Type::getInt32Ty(Context)) 3460 return Error(SizeLoc, "element count must be i32"); 3461 3462 if (Opc == Instruction::Malloc) 3463 Inst = new MallocInst(Ty, Size, Alignment); 3464 else 3465 Inst = new AllocaInst(Ty, Size, Alignment); 3466 return false; 3467} 3468 3469/// ParseFree 3470/// ::= 'free' TypeAndValue 3471bool LLParser::ParseFree(Instruction *&Inst, PerFunctionState &PFS) { 3472 Value *Val; LocTy Loc; 3473 if (ParseTypeAndValue(Val, Loc, PFS)) return true; 3474 if (!isa<PointerType>(Val->getType())) 3475 return Error(Loc, "operand to free must be a pointer"); 3476 Inst = new FreeInst(Val); 3477 return false; 3478} 3479 3480/// ParseLoad 3481/// ::= 'volatile'? 'load' TypeAndValue (',' OptionalInfo)? 3482bool LLParser::ParseLoad(Instruction *&Inst, PerFunctionState &PFS, 3483 bool isVolatile) { 3484 Value *Val; LocTy Loc; 3485 unsigned Alignment = 0; 3486 if (ParseTypeAndValue(Val, Loc, PFS)) return true; 3487 3488 if (EatIfPresent(lltok::comma)) 3489 if (ParseOptionalInfo(Alignment)) return true; 3490 3491 if (!isa<PointerType>(Val->getType()) || 3492 !cast<PointerType>(Val->getType())->getElementType()->isFirstClassType()) 3493 return Error(Loc, "load operand must be a pointer to a first class type"); 3494 3495 Inst = new LoadInst(Val, "", isVolatile, Alignment); 3496 return false; 3497} 3498 3499/// ParseStore 3500/// ::= 'volatile'? 'store' TypeAndValue ',' TypeAndValue (',' 'align' i32)? 3501bool LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS, 3502 bool isVolatile) { 3503 Value *Val, *Ptr; LocTy Loc, PtrLoc; 3504 unsigned Alignment = 0; 3505 if (ParseTypeAndValue(Val, Loc, PFS) || 3506 ParseToken(lltok::comma, "expected ',' after store operand") || 3507 ParseTypeAndValue(Ptr, PtrLoc, PFS)) 3508 return true; 3509 3510 if (EatIfPresent(lltok::comma)) 3511 if (ParseOptionalInfo(Alignment)) return true; 3512 3513 if (!isa<PointerType>(Ptr->getType())) 3514 return Error(PtrLoc, "store operand must be a pointer"); 3515 if (!Val->getType()->isFirstClassType()) 3516 return Error(Loc, "store operand must be a first class value"); 3517 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType()) 3518 return Error(Loc, "stored value and pointer type do not match"); 3519 3520 Inst = new StoreInst(Val, Ptr, isVolatile, Alignment); 3521 return false; 3522} 3523 3524/// ParseGetResult 3525/// ::= 'getresult' TypeAndValue ',' i32 3526/// FIXME: Remove support for getresult in LLVM 3.0 3527bool LLParser::ParseGetResult(Instruction *&Inst, PerFunctionState &PFS) { 3528 Value *Val; LocTy ValLoc, EltLoc; 3529 unsigned Element; 3530 if (ParseTypeAndValue(Val, ValLoc, PFS) || 3531 ParseToken(lltok::comma, "expected ',' after getresult operand") || 3532 ParseUInt32(Element, EltLoc)) 3533 return true; 3534 3535 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 3536 return Error(ValLoc, "getresult inst requires an aggregate operand"); 3537 if (!ExtractValueInst::getIndexedType(Val->getType(), Element)) 3538 return Error(EltLoc, "invalid getresult index for value"); 3539 Inst = ExtractValueInst::Create(Val, Element); 3540 return false; 3541} 3542 3543/// ParseGetElementPtr 3544/// ::= 'getelementptr' 'inbounds'? TypeAndValue (',' TypeAndValue)* 3545bool LLParser::ParseGetElementPtr(Instruction *&Inst, PerFunctionState &PFS) { 3546 Value *Ptr, *Val; LocTy Loc, EltLoc; 3547 3548 bool InBounds = EatIfPresent(lltok::kw_inbounds); 3549 3550 if (ParseTypeAndValue(Ptr, Loc, PFS)) return true; 3551 3552 if (!isa<PointerType>(Ptr->getType())) 3553 return Error(Loc, "base of getelementptr must be a pointer"); 3554 3555 SmallVector<Value*, 16> Indices; 3556 while (EatIfPresent(lltok::comma)) { 3557 if (Lex.getKind() == lltok::NamedOrCustomMD) 3558 break; 3559 if (ParseTypeAndValue(Val, EltLoc, PFS)) return true; 3560 if (!isa<IntegerType>(Val->getType())) 3561 return Error(EltLoc, "getelementptr index must be an integer"); 3562 Indices.push_back(Val); 3563 } 3564 if (Lex.getKind() == lltok::NamedOrCustomMD) 3565 if (ParseOptionalCustomMetadata()) return true; 3566 3567 if (!GetElementPtrInst::getIndexedType(Ptr->getType(), 3568 Indices.begin(), Indices.end())) 3569 return Error(Loc, "invalid getelementptr indices"); 3570 Inst = GetElementPtrInst::Create(Ptr, Indices.begin(), Indices.end()); 3571 if (InBounds) 3572 cast<GetElementPtrInst>(Inst)->setIsInBounds(true); 3573 return false; 3574} 3575 3576/// ParseExtractValue 3577/// ::= 'extractvalue' TypeAndValue (',' uint32)+ 3578bool LLParser::ParseExtractValue(Instruction *&Inst, PerFunctionState &PFS) { 3579 Value *Val; LocTy Loc; 3580 SmallVector<unsigned, 4> Indices; 3581 if (ParseTypeAndValue(Val, Loc, PFS) || 3582 ParseIndexList(Indices)) 3583 return true; 3584 3585 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 3586 return Error(Loc, "extractvalue operand must be array or struct"); 3587 3588 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 3589 Indices.end())) 3590 return Error(Loc, "invalid indices for extractvalue"); 3591 Inst = ExtractValueInst::Create(Val, Indices.begin(), Indices.end()); 3592 return false; 3593} 3594 3595/// ParseInsertValue 3596/// ::= 'insertvalue' TypeAndValue ',' TypeAndValue (',' uint32)+ 3597bool LLParser::ParseInsertValue(Instruction *&Inst, PerFunctionState &PFS) { 3598 Value *Val0, *Val1; LocTy Loc0, Loc1; 3599 SmallVector<unsigned, 4> Indices; 3600 if (ParseTypeAndValue(Val0, Loc0, PFS) || 3601 ParseToken(lltok::comma, "expected comma after insertvalue operand") || 3602 ParseTypeAndValue(Val1, Loc1, PFS) || 3603 ParseIndexList(Indices)) 3604 return true; 3605 3606 if (!isa<StructType>(Val0->getType()) && !isa<ArrayType>(Val0->getType())) 3607 return Error(Loc0, "extractvalue operand must be array or struct"); 3608 3609 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 3610 Indices.end())) 3611 return Error(Loc0, "invalid indices for insertvalue"); 3612 Inst = InsertValueInst::Create(Val0, Val1, Indices.begin(), Indices.end()); 3613 return false; 3614} 3615 3616//===----------------------------------------------------------------------===// 3617// Embedded metadata. 3618//===----------------------------------------------------------------------===// 3619 3620/// ParseMDNodeVector 3621/// ::= Element (',' Element)* 3622/// Element 3623/// ::= 'null' | TypeAndValue 3624bool LLParser::ParseMDNodeVector(SmallVectorImpl<Value*> &Elts) { 3625 assert(Lex.getKind() == lltok::lbrace); 3626 Lex.Lex(); 3627 do { 3628 Value *V = 0; 3629 if (Lex.getKind() == lltok::kw_null) { 3630 Lex.Lex(); 3631 V = 0; 3632 } else { 3633 PATypeHolder Ty(Type::getVoidTy(Context)); 3634 if (ParseType(Ty)) return true; 3635 if (Lex.getKind() == lltok::Metadata) { 3636 Lex.Lex(); 3637 MetadataBase *Node = 0; 3638 if (!ParseMDNode(Node)) 3639 V = Node; 3640 else { 3641 MetadataBase *MDS = 0; 3642 if (ParseMDString(MDS)) return true; 3643 V = MDS; 3644 } 3645 } else { 3646 Constant *C; 3647 if (ParseGlobalValue(Ty, C)) return true; 3648 V = C; 3649 } 3650 } 3651 Elts.push_back(V); 3652 } while (EatIfPresent(lltok::comma)); 3653 3654 return false; 3655} 3656