LLParser.cpp revision 66284e063a1e46500acae48bdc0e4a00652021d1
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 // Update auto-upgraded malloc calls to "malloc". 73 // FIXME: Remove in LLVM 3.0. 74 if (MallocF) { 75 MallocF->setName("malloc"); 76 // If setName() does not set the name to "malloc", then there is already a 77 // declaration of "malloc". In that case, iterate over all calls to MallocF 78 // and get them to call the declared "malloc" instead. 79 if (MallocF->getName() != "malloc") { 80 Constant* RealMallocF = M->getFunction("malloc"); 81 if (RealMallocF->getType() != MallocF->getType()) 82 RealMallocF = ConstantExpr::getBitCast(RealMallocF, MallocF->getType()); 83 MallocF->replaceAllUsesWith(RealMallocF); 84 MallocF->eraseFromParent(); 85 MallocF = NULL; 86 } 87 } 88 89 if (!ForwardRefTypes.empty()) 90 return Error(ForwardRefTypes.begin()->second.second, 91 "use of undefined type named '" + 92 ForwardRefTypes.begin()->first + "'"); 93 if (!ForwardRefTypeIDs.empty()) 94 return Error(ForwardRefTypeIDs.begin()->second.second, 95 "use of undefined type '%" + 96 utostr(ForwardRefTypeIDs.begin()->first) + "'"); 97 98 if (!ForwardRefVals.empty()) 99 return Error(ForwardRefVals.begin()->second.second, 100 "use of undefined value '@" + ForwardRefVals.begin()->first + 101 "'"); 102 103 if (!ForwardRefValIDs.empty()) 104 return Error(ForwardRefValIDs.begin()->second.second, 105 "use of undefined value '@" + 106 utostr(ForwardRefValIDs.begin()->first) + "'"); 107 108 if (!ForwardRefMDNodes.empty()) 109 return Error(ForwardRefMDNodes.begin()->second.second, 110 "use of undefined metadata '!" + 111 utostr(ForwardRefMDNodes.begin()->first) + "'"); 112 113 114 // Look for intrinsic functions and CallInst that need to be upgraded 115 for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ) 116 UpgradeCallsToIntrinsic(FI++); // must be post-increment, as we remove 117 118 // Check debug info intrinsics. 119 CheckDebugInfoIntrinsics(M); 120 return false; 121} 122 123//===----------------------------------------------------------------------===// 124// Top-Level Entities 125//===----------------------------------------------------------------------===// 126 127bool LLParser::ParseTopLevelEntities() { 128 while (1) { 129 switch (Lex.getKind()) { 130 default: return TokError("expected top-level entity"); 131 case lltok::Eof: return false; 132 //case lltok::kw_define: 133 case lltok::kw_declare: if (ParseDeclare()) return true; break; 134 case lltok::kw_define: if (ParseDefine()) return true; break; 135 case lltok::kw_module: if (ParseModuleAsm()) return true; break; 136 case lltok::kw_target: if (ParseTargetDefinition()) return true; break; 137 case lltok::kw_deplibs: if (ParseDepLibs()) return true; break; 138 case lltok::kw_type: if (ParseUnnamedType()) return true; break; 139 case lltok::LocalVarID: if (ParseUnnamedType()) return true; break; 140 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0 141 case lltok::LocalVar: if (ParseNamedType()) return true; break; 142 case lltok::GlobalID: if (ParseUnnamedGlobal()) return true; break; 143 case lltok::GlobalVar: if (ParseNamedGlobal()) return true; break; 144 case lltok::Metadata: if (ParseStandaloneMetadata()) return true; break; 145 case lltok::NamedOrCustomMD: if (ParseNamedMetadata()) return true; break; 146 147 // The Global variable production with no name can have many different 148 // optional leading prefixes, the production is: 149 // GlobalVar ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 150 // OptionalAddrSpace ('constant'|'global') ... 151 case lltok::kw_private : // OptionalLinkage 152 case lltok::kw_linker_private: // OptionalLinkage 153 case lltok::kw_internal: // OptionalLinkage 154 case lltok::kw_weak: // OptionalLinkage 155 case lltok::kw_weak_odr: // OptionalLinkage 156 case lltok::kw_linkonce: // OptionalLinkage 157 case lltok::kw_linkonce_odr: // OptionalLinkage 158 case lltok::kw_appending: // OptionalLinkage 159 case lltok::kw_dllexport: // OptionalLinkage 160 case lltok::kw_common: // OptionalLinkage 161 case lltok::kw_dllimport: // OptionalLinkage 162 case lltok::kw_extern_weak: // OptionalLinkage 163 case lltok::kw_external: { // OptionalLinkage 164 unsigned Linkage, Visibility; 165 if (ParseOptionalLinkage(Linkage) || 166 ParseOptionalVisibility(Visibility) || 167 ParseGlobal("", SMLoc(), Linkage, true, Visibility)) 168 return true; 169 break; 170 } 171 case lltok::kw_default: // OptionalVisibility 172 case lltok::kw_hidden: // OptionalVisibility 173 case lltok::kw_protected: { // OptionalVisibility 174 unsigned Visibility; 175 if (ParseOptionalVisibility(Visibility) || 176 ParseGlobal("", SMLoc(), 0, false, Visibility)) 177 return true; 178 break; 179 } 180 181 case lltok::kw_thread_local: // OptionalThreadLocal 182 case lltok::kw_addrspace: // OptionalAddrSpace 183 case lltok::kw_constant: // GlobalType 184 case lltok::kw_global: // GlobalType 185 if (ParseGlobal("", SMLoc(), 0, false, 0)) return true; 186 break; 187 } 188 } 189} 190 191 192/// toplevelentity 193/// ::= 'module' 'asm' STRINGCONSTANT 194bool LLParser::ParseModuleAsm() { 195 assert(Lex.getKind() == lltok::kw_module); 196 Lex.Lex(); 197 198 std::string AsmStr; 199 if (ParseToken(lltok::kw_asm, "expected 'module asm'") || 200 ParseStringConstant(AsmStr)) return true; 201 202 const std::string &AsmSoFar = M->getModuleInlineAsm(); 203 if (AsmSoFar.empty()) 204 M->setModuleInlineAsm(AsmStr); 205 else 206 M->setModuleInlineAsm(AsmSoFar+"\n"+AsmStr); 207 return false; 208} 209 210/// toplevelentity 211/// ::= 'target' 'triple' '=' STRINGCONSTANT 212/// ::= 'target' 'datalayout' '=' STRINGCONSTANT 213bool LLParser::ParseTargetDefinition() { 214 assert(Lex.getKind() == lltok::kw_target); 215 std::string Str; 216 switch (Lex.Lex()) { 217 default: return TokError("unknown target property"); 218 case lltok::kw_triple: 219 Lex.Lex(); 220 if (ParseToken(lltok::equal, "expected '=' after target triple") || 221 ParseStringConstant(Str)) 222 return true; 223 M->setTargetTriple(Str); 224 return false; 225 case lltok::kw_datalayout: 226 Lex.Lex(); 227 if (ParseToken(lltok::equal, "expected '=' after target datalayout") || 228 ParseStringConstant(Str)) 229 return true; 230 M->setDataLayout(Str); 231 return false; 232 } 233} 234 235/// toplevelentity 236/// ::= 'deplibs' '=' '[' ']' 237/// ::= 'deplibs' '=' '[' STRINGCONSTANT (',' STRINGCONSTANT)* ']' 238bool LLParser::ParseDepLibs() { 239 assert(Lex.getKind() == lltok::kw_deplibs); 240 Lex.Lex(); 241 if (ParseToken(lltok::equal, "expected '=' after deplibs") || 242 ParseToken(lltok::lsquare, "expected '=' after deplibs")) 243 return true; 244 245 if (EatIfPresent(lltok::rsquare)) 246 return false; 247 248 std::string Str; 249 if (ParseStringConstant(Str)) return true; 250 M->addLibrary(Str); 251 252 while (EatIfPresent(lltok::comma)) { 253 if (ParseStringConstant(Str)) return true; 254 M->addLibrary(Str); 255 } 256 257 return ParseToken(lltok::rsquare, "expected ']' at end of list"); 258} 259 260/// ParseUnnamedType: 261/// ::= 'type' type 262/// ::= LocalVarID '=' 'type' type 263bool LLParser::ParseUnnamedType() { 264 unsigned TypeID = NumberedTypes.size(); 265 266 // Handle the LocalVarID form. 267 if (Lex.getKind() == lltok::LocalVarID) { 268 if (Lex.getUIntVal() != TypeID) 269 return Error(Lex.getLoc(), "type expected to be numbered '%" + 270 utostr(TypeID) + "'"); 271 Lex.Lex(); // eat LocalVarID; 272 273 if (ParseToken(lltok::equal, "expected '=' after name")) 274 return true; 275 } 276 277 assert(Lex.getKind() == lltok::kw_type); 278 LocTy TypeLoc = Lex.getLoc(); 279 Lex.Lex(); // eat kw_type 280 281 PATypeHolder Ty(Type::getVoidTy(Context)); 282 if (ParseType(Ty)) return true; 283 284 // See if this type was previously referenced. 285 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 286 FI = ForwardRefTypeIDs.find(TypeID); 287 if (FI != ForwardRefTypeIDs.end()) { 288 if (FI->second.first.get() == Ty) 289 return Error(TypeLoc, "self referential type is invalid"); 290 291 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 292 Ty = FI->second.first.get(); 293 ForwardRefTypeIDs.erase(FI); 294 } 295 296 NumberedTypes.push_back(Ty); 297 298 return false; 299} 300 301/// toplevelentity 302/// ::= LocalVar '=' 'type' type 303bool LLParser::ParseNamedType() { 304 std::string Name = Lex.getStrVal(); 305 LocTy NameLoc = Lex.getLoc(); 306 Lex.Lex(); // eat LocalVar. 307 308 PATypeHolder Ty(Type::getVoidTy(Context)); 309 310 if (ParseToken(lltok::equal, "expected '=' after name") || 311 ParseToken(lltok::kw_type, "expected 'type' after name") || 312 ParseType(Ty)) 313 return true; 314 315 // Set the type name, checking for conflicts as we do so. 316 bool AlreadyExists = M->addTypeName(Name, Ty); 317 if (!AlreadyExists) return false; 318 319 // See if this type is a forward reference. We need to eagerly resolve 320 // types to allow recursive type redefinitions below. 321 std::map<std::string, std::pair<PATypeHolder, LocTy> >::iterator 322 FI = ForwardRefTypes.find(Name); 323 if (FI != ForwardRefTypes.end()) { 324 if (FI->second.first.get() == Ty) 325 return Error(NameLoc, "self referential type is invalid"); 326 327 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 328 Ty = FI->second.first.get(); 329 ForwardRefTypes.erase(FI); 330 } 331 332 // Inserting a name that is already defined, get the existing name. 333 const Type *Existing = M->getTypeByName(Name); 334 assert(Existing && "Conflict but no matching type?!"); 335 336 // Otherwise, this is an attempt to redefine a type. That's okay if 337 // the redefinition is identical to the original. 338 // FIXME: REMOVE REDEFINITIONS IN LLVM 3.0 339 if (Existing == Ty) return false; 340 341 // Any other kind of (non-equivalent) redefinition is an error. 342 return Error(NameLoc, "redefinition of type named '" + Name + "' of type '" + 343 Ty->getDescription() + "'"); 344} 345 346 347/// toplevelentity 348/// ::= 'declare' FunctionHeader 349bool LLParser::ParseDeclare() { 350 assert(Lex.getKind() == lltok::kw_declare); 351 Lex.Lex(); 352 353 Function *F; 354 return ParseFunctionHeader(F, false); 355} 356 357/// toplevelentity 358/// ::= 'define' FunctionHeader '{' ... 359bool LLParser::ParseDefine() { 360 assert(Lex.getKind() == lltok::kw_define); 361 Lex.Lex(); 362 363 Function *F; 364 return ParseFunctionHeader(F, true) || 365 ParseFunctionBody(*F); 366} 367 368/// ParseGlobalType 369/// ::= 'constant' 370/// ::= 'global' 371bool LLParser::ParseGlobalType(bool &IsConstant) { 372 if (Lex.getKind() == lltok::kw_constant) 373 IsConstant = true; 374 else if (Lex.getKind() == lltok::kw_global) 375 IsConstant = false; 376 else { 377 IsConstant = false; 378 return TokError("expected 'global' or 'constant'"); 379 } 380 Lex.Lex(); 381 return false; 382} 383 384/// ParseUnnamedGlobal: 385/// OptionalVisibility ALIAS ... 386/// OptionalLinkage OptionalVisibility ... -> global variable 387/// GlobalID '=' OptionalVisibility ALIAS ... 388/// GlobalID '=' OptionalLinkage OptionalVisibility ... -> global variable 389bool LLParser::ParseUnnamedGlobal() { 390 unsigned VarID = NumberedVals.size(); 391 std::string Name; 392 LocTy NameLoc = Lex.getLoc(); 393 394 // Handle the GlobalID form. 395 if (Lex.getKind() == lltok::GlobalID) { 396 if (Lex.getUIntVal() != VarID) 397 return Error(Lex.getLoc(), "variable expected to be numbered '%" + 398 utostr(VarID) + "'"); 399 Lex.Lex(); // eat GlobalID; 400 401 if (ParseToken(lltok::equal, "expected '=' after name")) 402 return true; 403 } 404 405 bool HasLinkage; 406 unsigned Linkage, Visibility; 407 if (ParseOptionalLinkage(Linkage, HasLinkage) || 408 ParseOptionalVisibility(Visibility)) 409 return true; 410 411 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 412 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 413 return ParseAlias(Name, NameLoc, Visibility); 414} 415 416/// ParseNamedGlobal: 417/// GlobalVar '=' OptionalVisibility ALIAS ... 418/// GlobalVar '=' OptionalLinkage OptionalVisibility ... -> global variable 419bool LLParser::ParseNamedGlobal() { 420 assert(Lex.getKind() == lltok::GlobalVar); 421 LocTy NameLoc = Lex.getLoc(); 422 std::string Name = Lex.getStrVal(); 423 Lex.Lex(); 424 425 bool HasLinkage; 426 unsigned Linkage, Visibility; 427 if (ParseToken(lltok::equal, "expected '=' in global variable") || 428 ParseOptionalLinkage(Linkage, HasLinkage) || 429 ParseOptionalVisibility(Visibility)) 430 return true; 431 432 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 433 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 434 return ParseAlias(Name, NameLoc, Visibility); 435} 436 437// MDString: 438// ::= '!' STRINGCONSTANT 439bool LLParser::ParseMDString(MetadataBase *&MDS) { 440 std::string Str; 441 if (ParseStringConstant(Str)) return true; 442 MDS = MDString::get(Context, Str); 443 return false; 444} 445 446// MDNode: 447// ::= '!' MDNodeNumber 448bool LLParser::ParseMDNode(MetadataBase *&Node) { 449 // !{ ..., !42, ... } 450 unsigned MID = 0; 451 if (ParseUInt32(MID)) return true; 452 453 // Check existing MDNode. 454 std::map<unsigned, MetadataBase *>::iterator I = MetadataCache.find(MID); 455 if (I != MetadataCache.end()) { 456 Node = I->second; 457 return false; 458 } 459 460 // Check known forward references. 461 std::map<unsigned, std::pair<MetadataBase *, LocTy> >::iterator 462 FI = ForwardRefMDNodes.find(MID); 463 if (FI != ForwardRefMDNodes.end()) { 464 Node = FI->second.first; 465 return false; 466 } 467 468 // Create MDNode forward reference 469 SmallVector<Value *, 1> Elts; 470 std::string FwdRefName = "llvm.mdnode.fwdref." + utostr(MID); 471 Elts.push_back(MDString::get(Context, FwdRefName)); 472 MDNode *FwdNode = MDNode::get(Context, Elts.data(), Elts.size()); 473 ForwardRefMDNodes[MID] = std::make_pair(FwdNode, Lex.getLoc()); 474 Node = FwdNode; 475 return false; 476} 477 478///ParseNamedMetadata: 479/// !foo = !{ !1, !2 } 480bool LLParser::ParseNamedMetadata() { 481 assert(Lex.getKind() == lltok::NamedOrCustomMD); 482 Lex.Lex(); 483 std::string Name = Lex.getStrVal(); 484 485 if (ParseToken(lltok::equal, "expected '=' here")) 486 return true; 487 488 if (Lex.getKind() != lltok::Metadata) 489 return TokError("Expected '!' here"); 490 Lex.Lex(); 491 492 if (Lex.getKind() != lltok::lbrace) 493 return TokError("Expected '{' here"); 494 Lex.Lex(); 495 SmallVector<MetadataBase *, 8> Elts; 496 do { 497 if (Lex.getKind() != lltok::Metadata) 498 return TokError("Expected '!' here"); 499 Lex.Lex(); 500 MetadataBase *N = 0; 501 if (ParseMDNode(N)) return true; 502 Elts.push_back(N); 503 } while (EatIfPresent(lltok::comma)); 504 505 if (ParseToken(lltok::rbrace, "expected end of metadata node")) 506 return true; 507 508 NamedMDNode::Create(Context, Name, Elts.data(), Elts.size(), M); 509 return false; 510} 511 512/// ParseStandaloneMetadata: 513/// !42 = !{...} 514bool LLParser::ParseStandaloneMetadata() { 515 assert(Lex.getKind() == lltok::Metadata); 516 Lex.Lex(); 517 unsigned MetadataID = 0; 518 if (ParseUInt32(MetadataID)) 519 return true; 520 if (MetadataCache.find(MetadataID) != MetadataCache.end()) 521 return TokError("Metadata id is already used"); 522 if (ParseToken(lltok::equal, "expected '=' here")) 523 return true; 524 525 LocTy TyLoc; 526 PATypeHolder Ty(Type::getVoidTy(Context)); 527 if (ParseType(Ty, TyLoc)) 528 return true; 529 530 if (Lex.getKind() != lltok::Metadata) 531 return TokError("Expected metadata here"); 532 533 Lex.Lex(); 534 if (Lex.getKind() != lltok::lbrace) 535 return TokError("Expected '{' here"); 536 537 SmallVector<Value *, 16> Elts; 538 if (ParseMDNodeVector(Elts) 539 || ParseToken(lltok::rbrace, "expected end of metadata node")) 540 return true; 541 542 MDNode *Init = MDNode::get(Context, Elts.data(), Elts.size()); 543 MetadataCache[MetadataID] = Init; 544 std::map<unsigned, std::pair<MetadataBase *, LocTy> >::iterator 545 FI = ForwardRefMDNodes.find(MetadataID); 546 if (FI != ForwardRefMDNodes.end()) { 547 MDNode *FwdNode = cast<MDNode>(FI->second.first); 548 FwdNode->replaceAllUsesWith(Init); 549 ForwardRefMDNodes.erase(FI); 550 } 551 552 return false; 553} 554 555/// ParseAlias: 556/// ::= GlobalVar '=' OptionalVisibility 'alias' OptionalLinkage Aliasee 557/// Aliasee 558/// ::= TypeAndValue 559/// ::= 'bitcast' '(' TypeAndValue 'to' Type ')' 560/// ::= 'getelementptr' 'inbounds'? '(' ... ')' 561/// 562/// Everything through visibility has already been parsed. 563/// 564bool LLParser::ParseAlias(const std::string &Name, LocTy NameLoc, 565 unsigned Visibility) { 566 assert(Lex.getKind() == lltok::kw_alias); 567 Lex.Lex(); 568 unsigned Linkage; 569 LocTy LinkageLoc = Lex.getLoc(); 570 if (ParseOptionalLinkage(Linkage)) 571 return true; 572 573 if (Linkage != GlobalValue::ExternalLinkage && 574 Linkage != GlobalValue::WeakAnyLinkage && 575 Linkage != GlobalValue::WeakODRLinkage && 576 Linkage != GlobalValue::InternalLinkage && 577 Linkage != GlobalValue::PrivateLinkage && 578 Linkage != GlobalValue::LinkerPrivateLinkage) 579 return Error(LinkageLoc, "invalid linkage type for alias"); 580 581 Constant *Aliasee; 582 LocTy AliaseeLoc = Lex.getLoc(); 583 if (Lex.getKind() != lltok::kw_bitcast && 584 Lex.getKind() != lltok::kw_getelementptr) { 585 if (ParseGlobalTypeAndValue(Aliasee)) return true; 586 } else { 587 // The bitcast dest type is not present, it is implied by the dest type. 588 ValID ID; 589 if (ParseValID(ID)) return true; 590 if (ID.Kind != ValID::t_Constant) 591 return Error(AliaseeLoc, "invalid aliasee"); 592 Aliasee = ID.ConstantVal; 593 } 594 595 if (!isa<PointerType>(Aliasee->getType())) 596 return Error(AliaseeLoc, "alias must have pointer type"); 597 598 // Okay, create the alias but do not insert it into the module yet. 599 GlobalAlias* GA = new GlobalAlias(Aliasee->getType(), 600 (GlobalValue::LinkageTypes)Linkage, Name, 601 Aliasee); 602 GA->setVisibility((GlobalValue::VisibilityTypes)Visibility); 603 604 // See if this value already exists in the symbol table. If so, it is either 605 // a redefinition or a definition of a forward reference. 606 if (GlobalValue *Val = 607 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name))) { 608 // See if this was a redefinition. If so, there is no entry in 609 // ForwardRefVals. 610 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 611 I = ForwardRefVals.find(Name); 612 if (I == ForwardRefVals.end()) 613 return Error(NameLoc, "redefinition of global named '@" + Name + "'"); 614 615 // Otherwise, this was a definition of forward ref. Verify that types 616 // agree. 617 if (Val->getType() != GA->getType()) 618 return Error(NameLoc, 619 "forward reference and definition of alias have different types"); 620 621 // If they agree, just RAUW the old value with the alias and remove the 622 // forward ref info. 623 Val->replaceAllUsesWith(GA); 624 Val->eraseFromParent(); 625 ForwardRefVals.erase(I); 626 } 627 628 // Insert into the module, we know its name won't collide now. 629 M->getAliasList().push_back(GA); 630 assert(GA->getNameStr() == Name && "Should not be a name conflict!"); 631 632 return false; 633} 634 635/// ParseGlobal 636/// ::= GlobalVar '=' OptionalLinkage OptionalVisibility OptionalThreadLocal 637/// OptionalAddrSpace GlobalType Type Const 638/// ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 639/// OptionalAddrSpace GlobalType Type Const 640/// 641/// Everything through visibility has been parsed already. 642/// 643bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc, 644 unsigned Linkage, bool HasLinkage, 645 unsigned Visibility) { 646 unsigned AddrSpace; 647 bool ThreadLocal, IsConstant; 648 LocTy TyLoc; 649 650 PATypeHolder Ty(Type::getVoidTy(Context)); 651 if (ParseOptionalToken(lltok::kw_thread_local, ThreadLocal) || 652 ParseOptionalAddrSpace(AddrSpace) || 653 ParseGlobalType(IsConstant) || 654 ParseType(Ty, TyLoc)) 655 return true; 656 657 // If the linkage is specified and is external, then no initializer is 658 // present. 659 Constant *Init = 0; 660 if (!HasLinkage || (Linkage != GlobalValue::DLLImportLinkage && 661 Linkage != GlobalValue::ExternalWeakLinkage && 662 Linkage != GlobalValue::ExternalLinkage)) { 663 if (ParseGlobalValue(Ty, Init)) 664 return true; 665 } 666 667 if (isa<FunctionType>(Ty) || Ty->isLabelTy()) 668 return Error(TyLoc, "invalid type for global variable"); 669 670 GlobalVariable *GV = 0; 671 672 // See if the global was forward referenced, if so, use the global. 673 if (!Name.empty()) { 674 if ((GV = M->getGlobalVariable(Name, true)) && 675 !ForwardRefVals.erase(Name)) 676 return Error(NameLoc, "redefinition of global '@" + Name + "'"); 677 } else { 678 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 679 I = ForwardRefValIDs.find(NumberedVals.size()); 680 if (I != ForwardRefValIDs.end()) { 681 GV = cast<GlobalVariable>(I->second.first); 682 ForwardRefValIDs.erase(I); 683 } 684 } 685 686 if (GV == 0) { 687 GV = new GlobalVariable(*M, Ty, false, GlobalValue::ExternalLinkage, 0, 688 Name, 0, false, AddrSpace); 689 } else { 690 if (GV->getType()->getElementType() != Ty) 691 return Error(TyLoc, 692 "forward reference and definition of global have different types"); 693 694 // Move the forward-reference to the correct spot in the module. 695 M->getGlobalList().splice(M->global_end(), M->getGlobalList(), GV); 696 } 697 698 if (Name.empty()) 699 NumberedVals.push_back(GV); 700 701 // Set the parsed properties on the global. 702 if (Init) 703 GV->setInitializer(Init); 704 GV->setConstant(IsConstant); 705 GV->setLinkage((GlobalValue::LinkageTypes)Linkage); 706 GV->setVisibility((GlobalValue::VisibilityTypes)Visibility); 707 GV->setThreadLocal(ThreadLocal); 708 709 // Parse attributes on the global. 710 while (Lex.getKind() == lltok::comma) { 711 Lex.Lex(); 712 713 if (Lex.getKind() == lltok::kw_section) { 714 Lex.Lex(); 715 GV->setSection(Lex.getStrVal()); 716 if (ParseToken(lltok::StringConstant, "expected global section string")) 717 return true; 718 } else if (Lex.getKind() == lltok::kw_align) { 719 unsigned Alignment; 720 if (ParseOptionalAlignment(Alignment)) return true; 721 GV->setAlignment(Alignment); 722 } else { 723 TokError("unknown global variable property!"); 724 } 725 } 726 727 return false; 728} 729 730 731//===----------------------------------------------------------------------===// 732// GlobalValue Reference/Resolution Routines. 733//===----------------------------------------------------------------------===// 734 735/// GetGlobalVal - Get a value with the specified name or ID, creating a 736/// forward reference record if needed. This can return null if the value 737/// exists but does not have the right type. 738GlobalValue *LLParser::GetGlobalVal(const std::string &Name, const Type *Ty, 739 LocTy Loc) { 740 const PointerType *PTy = dyn_cast<PointerType>(Ty); 741 if (PTy == 0) { 742 Error(Loc, "global variable reference must have pointer type"); 743 return 0; 744 } 745 746 // Look this name up in the normal function symbol table. 747 GlobalValue *Val = 748 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name)); 749 750 // If this is a forward reference for the value, see if we already created a 751 // forward ref record. 752 if (Val == 0) { 753 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 754 I = ForwardRefVals.find(Name); 755 if (I != ForwardRefVals.end()) 756 Val = I->second.first; 757 } 758 759 // If we have the value in the symbol table or fwd-ref table, return it. 760 if (Val) { 761 if (Val->getType() == Ty) return Val; 762 Error(Loc, "'@" + Name + "' defined with type '" + 763 Val->getType()->getDescription() + "'"); 764 return 0; 765 } 766 767 // Otherwise, create a new forward reference for this value and remember it. 768 GlobalValue *FwdVal; 769 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 770 // Function types can return opaque but functions can't. 771 if (isa<OpaqueType>(FT->getReturnType())) { 772 Error(Loc, "function may not return opaque type"); 773 return 0; 774 } 775 776 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M); 777 } else { 778 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 779 GlobalValue::ExternalWeakLinkage, 0, Name); 780 } 781 782 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 783 return FwdVal; 784} 785 786GlobalValue *LLParser::GetGlobalVal(unsigned ID, const Type *Ty, LocTy Loc) { 787 const PointerType *PTy = dyn_cast<PointerType>(Ty); 788 if (PTy == 0) { 789 Error(Loc, "global variable reference must have pointer type"); 790 return 0; 791 } 792 793 GlobalValue *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 794 795 // If this is a forward reference for the value, see if we already created a 796 // forward ref record. 797 if (Val == 0) { 798 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 799 I = ForwardRefValIDs.find(ID); 800 if (I != ForwardRefValIDs.end()) 801 Val = I->second.first; 802 } 803 804 // If we have the value in the symbol table or fwd-ref table, return it. 805 if (Val) { 806 if (Val->getType() == Ty) return Val; 807 Error(Loc, "'@" + utostr(ID) + "' defined with type '" + 808 Val->getType()->getDescription() + "'"); 809 return 0; 810 } 811 812 // Otherwise, create a new forward reference for this value and remember it. 813 GlobalValue *FwdVal; 814 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 815 // Function types can return opaque but functions can't. 816 if (isa<OpaqueType>(FT->getReturnType())) { 817 Error(Loc, "function may not return opaque type"); 818 return 0; 819 } 820 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, "", M); 821 } else { 822 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 823 GlobalValue::ExternalWeakLinkage, 0, ""); 824 } 825 826 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 827 return FwdVal; 828} 829 830 831//===----------------------------------------------------------------------===// 832// Helper Routines. 833//===----------------------------------------------------------------------===// 834 835/// ParseToken - If the current token has the specified kind, eat it and return 836/// success. Otherwise, emit the specified error and return failure. 837bool LLParser::ParseToken(lltok::Kind T, const char *ErrMsg) { 838 if (Lex.getKind() != T) 839 return TokError(ErrMsg); 840 Lex.Lex(); 841 return false; 842} 843 844/// ParseStringConstant 845/// ::= StringConstant 846bool LLParser::ParseStringConstant(std::string &Result) { 847 if (Lex.getKind() != lltok::StringConstant) 848 return TokError("expected string constant"); 849 Result = Lex.getStrVal(); 850 Lex.Lex(); 851 return false; 852} 853 854/// ParseUInt32 855/// ::= uint32 856bool LLParser::ParseUInt32(unsigned &Val) { 857 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned()) 858 return TokError("expected integer"); 859 uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(0xFFFFFFFFULL+1); 860 if (Val64 != unsigned(Val64)) 861 return TokError("expected 32-bit integer (too large)"); 862 Val = Val64; 863 Lex.Lex(); 864 return false; 865} 866 867 868/// ParseOptionalAddrSpace 869/// := /*empty*/ 870/// := 'addrspace' '(' uint32 ')' 871bool LLParser::ParseOptionalAddrSpace(unsigned &AddrSpace) { 872 AddrSpace = 0; 873 if (!EatIfPresent(lltok::kw_addrspace)) 874 return false; 875 return ParseToken(lltok::lparen, "expected '(' in address space") || 876 ParseUInt32(AddrSpace) || 877 ParseToken(lltok::rparen, "expected ')' in address space"); 878} 879 880/// ParseOptionalAttrs - Parse a potentially empty attribute list. AttrKind 881/// indicates what kind of attribute list this is: 0: function arg, 1: result, 882/// 2: function attr. 883/// 3: function arg after value: FIXME: REMOVE IN LLVM 3.0 884bool LLParser::ParseOptionalAttrs(unsigned &Attrs, unsigned AttrKind) { 885 Attrs = Attribute::None; 886 LocTy AttrLoc = Lex.getLoc(); 887 888 while (1) { 889 switch (Lex.getKind()) { 890 case lltok::kw_sext: 891 case lltok::kw_zext: 892 // Treat these as signext/zeroext if they occur in the argument list after 893 // the value, as in "call i8 @foo(i8 10 sext)". If they occur before the 894 // value, as in "call i8 @foo(i8 sext (" then it is part of a constant 895 // expr. 896 // FIXME: REMOVE THIS IN LLVM 3.0 897 if (AttrKind == 3) { 898 if (Lex.getKind() == lltok::kw_sext) 899 Attrs |= Attribute::SExt; 900 else 901 Attrs |= Attribute::ZExt; 902 break; 903 } 904 // FALL THROUGH. 905 default: // End of attributes. 906 if (AttrKind != 2 && (Attrs & Attribute::FunctionOnly)) 907 return Error(AttrLoc, "invalid use of function-only attribute"); 908 909 if (AttrKind != 0 && AttrKind != 3 && (Attrs & Attribute::ParameterOnly)) 910 return Error(AttrLoc, "invalid use of parameter-only attribute"); 911 912 return false; 913 case lltok::kw_zeroext: Attrs |= Attribute::ZExt; break; 914 case lltok::kw_signext: Attrs |= Attribute::SExt; break; 915 case lltok::kw_inreg: Attrs |= Attribute::InReg; break; 916 case lltok::kw_sret: Attrs |= Attribute::StructRet; break; 917 case lltok::kw_noalias: Attrs |= Attribute::NoAlias; break; 918 case lltok::kw_nocapture: Attrs |= Attribute::NoCapture; break; 919 case lltok::kw_byval: Attrs |= Attribute::ByVal; break; 920 case lltok::kw_nest: Attrs |= Attribute::Nest; break; 921 922 case lltok::kw_noreturn: Attrs |= Attribute::NoReturn; break; 923 case lltok::kw_nounwind: Attrs |= Attribute::NoUnwind; break; 924 case lltok::kw_noinline: Attrs |= Attribute::NoInline; break; 925 case lltok::kw_readnone: Attrs |= Attribute::ReadNone; break; 926 case lltok::kw_readonly: Attrs |= Attribute::ReadOnly; break; 927 case lltok::kw_inlinehint: Attrs |= Attribute::InlineHint; break; 928 case lltok::kw_alwaysinline: Attrs |= Attribute::AlwaysInline; break; 929 case lltok::kw_optsize: Attrs |= Attribute::OptimizeForSize; break; 930 case lltok::kw_ssp: Attrs |= Attribute::StackProtect; break; 931 case lltok::kw_sspreq: Attrs |= Attribute::StackProtectReq; break; 932 case lltok::kw_noredzone: Attrs |= Attribute::NoRedZone; break; 933 case lltok::kw_noimplicitfloat: Attrs |= Attribute::NoImplicitFloat; break; 934 case lltok::kw_naked: Attrs |= Attribute::Naked; break; 935 936 case lltok::kw_align: { 937 unsigned Alignment; 938 if (ParseOptionalAlignment(Alignment)) 939 return true; 940 Attrs |= Attribute::constructAlignmentFromInt(Alignment); 941 continue; 942 } 943 } 944 Lex.Lex(); 945 } 946} 947 948/// ParseOptionalLinkage 949/// ::= /*empty*/ 950/// ::= 'private' 951/// ::= 'linker_private' 952/// ::= 'internal' 953/// ::= 'weak' 954/// ::= 'weak_odr' 955/// ::= 'linkonce' 956/// ::= 'linkonce_odr' 957/// ::= 'appending' 958/// ::= 'dllexport' 959/// ::= 'common' 960/// ::= 'dllimport' 961/// ::= 'extern_weak' 962/// ::= 'external' 963bool LLParser::ParseOptionalLinkage(unsigned &Res, bool &HasLinkage) { 964 HasLinkage = false; 965 switch (Lex.getKind()) { 966 default: Res=GlobalValue::ExternalLinkage; return false; 967 case lltok::kw_private: Res = GlobalValue::PrivateLinkage; break; 968 case lltok::kw_linker_private: Res = GlobalValue::LinkerPrivateLinkage; break; 969 case lltok::kw_internal: Res = GlobalValue::InternalLinkage; break; 970 case lltok::kw_weak: Res = GlobalValue::WeakAnyLinkage; break; 971 case lltok::kw_weak_odr: Res = GlobalValue::WeakODRLinkage; break; 972 case lltok::kw_linkonce: Res = GlobalValue::LinkOnceAnyLinkage; break; 973 case lltok::kw_linkonce_odr: Res = GlobalValue::LinkOnceODRLinkage; break; 974 case lltok::kw_available_externally: 975 Res = GlobalValue::AvailableExternallyLinkage; 976 break; 977 case lltok::kw_appending: Res = GlobalValue::AppendingLinkage; break; 978 case lltok::kw_dllexport: Res = GlobalValue::DLLExportLinkage; break; 979 case lltok::kw_common: Res = GlobalValue::CommonLinkage; break; 980 case lltok::kw_dllimport: Res = GlobalValue::DLLImportLinkage; break; 981 case lltok::kw_extern_weak: Res = GlobalValue::ExternalWeakLinkage; break; 982 case lltok::kw_external: Res = GlobalValue::ExternalLinkage; break; 983 } 984 Lex.Lex(); 985 HasLinkage = true; 986 return false; 987} 988 989/// ParseOptionalVisibility 990/// ::= /*empty*/ 991/// ::= 'default' 992/// ::= 'hidden' 993/// ::= 'protected' 994/// 995bool LLParser::ParseOptionalVisibility(unsigned &Res) { 996 switch (Lex.getKind()) { 997 default: Res = GlobalValue::DefaultVisibility; return false; 998 case lltok::kw_default: Res = GlobalValue::DefaultVisibility; break; 999 case lltok::kw_hidden: Res = GlobalValue::HiddenVisibility; break; 1000 case lltok::kw_protected: Res = GlobalValue::ProtectedVisibility; break; 1001 } 1002 Lex.Lex(); 1003 return false; 1004} 1005 1006/// ParseOptionalCallingConv 1007/// ::= /*empty*/ 1008/// ::= 'ccc' 1009/// ::= 'fastcc' 1010/// ::= 'coldcc' 1011/// ::= 'x86_stdcallcc' 1012/// ::= 'x86_fastcallcc' 1013/// ::= 'arm_apcscc' 1014/// ::= 'arm_aapcscc' 1015/// ::= 'arm_aapcs_vfpcc' 1016/// ::= 'cc' UINT 1017/// 1018bool LLParser::ParseOptionalCallingConv(CallingConv::ID &CC) { 1019 switch (Lex.getKind()) { 1020 default: CC = CallingConv::C; return false; 1021 case lltok::kw_ccc: CC = CallingConv::C; break; 1022 case lltok::kw_fastcc: CC = CallingConv::Fast; break; 1023 case lltok::kw_coldcc: CC = CallingConv::Cold; break; 1024 case lltok::kw_x86_stdcallcc: CC = CallingConv::X86_StdCall; break; 1025 case lltok::kw_x86_fastcallcc: CC = CallingConv::X86_FastCall; break; 1026 case lltok::kw_arm_apcscc: CC = CallingConv::ARM_APCS; break; 1027 case lltok::kw_arm_aapcscc: CC = CallingConv::ARM_AAPCS; break; 1028 case lltok::kw_arm_aapcs_vfpcc:CC = CallingConv::ARM_AAPCS_VFP; break; 1029 case lltok::kw_cc: { 1030 unsigned ArbitraryCC; 1031 Lex.Lex(); 1032 if (ParseUInt32(ArbitraryCC)) { 1033 return true; 1034 } else 1035 CC = static_cast<CallingConv::ID>(ArbitraryCC); 1036 return false; 1037 } 1038 break; 1039 } 1040 1041 Lex.Lex(); 1042 return false; 1043} 1044 1045/// ParseOptionalCustomMetadata 1046/// ::= /* empty */ 1047/// ::= !dbg !42 1048bool LLParser::ParseOptionalCustomMetadata() { 1049 if (Lex.getKind() != lltok::NamedOrCustomMD) 1050 return false; 1051 1052 std::string Name = Lex.getStrVal(); 1053 Lex.Lex(); 1054 1055 if (Lex.getKind() != lltok::Metadata) 1056 return TokError("Expected '!' here"); 1057 Lex.Lex(); 1058 1059 MetadataBase *Node; 1060 if (ParseMDNode(Node)) return true; 1061 1062 MetadataContext &TheMetadata = M->getContext().getMetadata(); 1063 unsigned MDK = TheMetadata.getMDKind(Name.c_str()); 1064 if (!MDK) 1065 MDK = TheMetadata.registerMDKind(Name.c_str()); 1066 MDsOnInst.push_back(std::make_pair(MDK, cast<MDNode>(Node))); 1067 1068 return false; 1069} 1070 1071/// ParseOptionalAlignment 1072/// ::= /* empty */ 1073/// ::= 'align' 4 1074bool LLParser::ParseOptionalAlignment(unsigned &Alignment) { 1075 Alignment = 0; 1076 if (!EatIfPresent(lltok::kw_align)) 1077 return false; 1078 LocTy AlignLoc = Lex.getLoc(); 1079 if (ParseUInt32(Alignment)) return true; 1080 if (!isPowerOf2_32(Alignment)) 1081 return Error(AlignLoc, "alignment is not a power of two"); 1082 return false; 1083} 1084 1085/// ParseOptionalInfo 1086/// ::= OptionalInfo (',' OptionalInfo)+ 1087bool LLParser::ParseOptionalInfo(unsigned &Alignment) { 1088 1089 // FIXME: Handle customized metadata info attached with an instruction. 1090 do { 1091 if (Lex.getKind() == lltok::NamedOrCustomMD) { 1092 if (ParseOptionalCustomMetadata()) return true; 1093 } else if (Lex.getKind() == lltok::kw_align) { 1094 if (ParseOptionalAlignment(Alignment)) return true; 1095 } else 1096 return true; 1097 } while (EatIfPresent(lltok::comma)); 1098 1099 return false; 1100} 1101 1102 1103/// ParseIndexList 1104/// ::= (',' uint32)+ 1105bool LLParser::ParseIndexList(SmallVectorImpl<unsigned> &Indices) { 1106 if (Lex.getKind() != lltok::comma) 1107 return TokError("expected ',' as start of index list"); 1108 1109 while (EatIfPresent(lltok::comma)) { 1110 unsigned Idx; 1111 if (ParseUInt32(Idx)) return true; 1112 Indices.push_back(Idx); 1113 } 1114 1115 return false; 1116} 1117 1118//===----------------------------------------------------------------------===// 1119// Type Parsing. 1120//===----------------------------------------------------------------------===// 1121 1122/// ParseType - Parse and resolve a full type. 1123bool LLParser::ParseType(PATypeHolder &Result, bool AllowVoid) { 1124 LocTy TypeLoc = Lex.getLoc(); 1125 if (ParseTypeRec(Result)) return true; 1126 1127 // Verify no unresolved uprefs. 1128 if (!UpRefs.empty()) 1129 return Error(UpRefs.back().Loc, "invalid unresolved type up reference"); 1130 1131 if (!AllowVoid && Result.get()->isVoidTy()) 1132 return Error(TypeLoc, "void type only allowed for function results"); 1133 1134 return false; 1135} 1136 1137/// HandleUpRefs - Every time we finish a new layer of types, this function is 1138/// called. It loops through the UpRefs vector, which is a list of the 1139/// currently active types. For each type, if the up-reference is contained in 1140/// the newly completed type, we decrement the level count. When the level 1141/// count reaches zero, the up-referenced type is the type that is passed in: 1142/// thus we can complete the cycle. 1143/// 1144PATypeHolder LLParser::HandleUpRefs(const Type *ty) { 1145 // If Ty isn't abstract, or if there are no up-references in it, then there is 1146 // nothing to resolve here. 1147 if (!ty->isAbstract() || UpRefs.empty()) return ty; 1148 1149 PATypeHolder Ty(ty); 1150#if 0 1151 errs() << "Type '" << Ty->getDescription() 1152 << "' newly formed. Resolving upreferences.\n" 1153 << UpRefs.size() << " upreferences active!\n"; 1154#endif 1155 1156 // If we find any resolvable upreferences (i.e., those whose NestingLevel goes 1157 // to zero), we resolve them all together before we resolve them to Ty. At 1158 // the end of the loop, if there is anything to resolve to Ty, it will be in 1159 // this variable. 1160 OpaqueType *TypeToResolve = 0; 1161 1162 for (unsigned i = 0; i != UpRefs.size(); ++i) { 1163 // Determine if 'Ty' directly contains this up-references 'LastContainedTy'. 1164 bool ContainsType = 1165 std::find(Ty->subtype_begin(), Ty->subtype_end(), 1166 UpRefs[i].LastContainedTy) != Ty->subtype_end(); 1167 1168#if 0 1169 errs() << " UR#" << i << " - TypeContains(" << Ty->getDescription() << ", " 1170 << UpRefs[i].LastContainedTy->getDescription() << ") = " 1171 << (ContainsType ? "true" : "false") 1172 << " level=" << UpRefs[i].NestingLevel << "\n"; 1173#endif 1174 if (!ContainsType) 1175 continue; 1176 1177 // Decrement level of upreference 1178 unsigned Level = --UpRefs[i].NestingLevel; 1179 UpRefs[i].LastContainedTy = Ty; 1180 1181 // If the Up-reference has a non-zero level, it shouldn't be resolved yet. 1182 if (Level != 0) 1183 continue; 1184 1185#if 0 1186 errs() << " * Resolving upreference for " << UpRefs[i].UpRefTy << "\n"; 1187#endif 1188 if (!TypeToResolve) 1189 TypeToResolve = UpRefs[i].UpRefTy; 1190 else 1191 UpRefs[i].UpRefTy->refineAbstractTypeTo(TypeToResolve); 1192 UpRefs.erase(UpRefs.begin()+i); // Remove from upreference list. 1193 --i; // Do not skip the next element. 1194 } 1195 1196 if (TypeToResolve) 1197 TypeToResolve->refineAbstractTypeTo(Ty); 1198 1199 return Ty; 1200} 1201 1202 1203/// ParseTypeRec - The recursive function used to process the internal 1204/// implementation details of types. 1205bool LLParser::ParseTypeRec(PATypeHolder &Result) { 1206 switch (Lex.getKind()) { 1207 default: 1208 return TokError("expected type"); 1209 case lltok::Type: 1210 // TypeRec ::= 'float' | 'void' (etc) 1211 Result = Lex.getTyVal(); 1212 Lex.Lex(); 1213 break; 1214 case lltok::kw_opaque: 1215 // TypeRec ::= 'opaque' 1216 Result = OpaqueType::get(Context); 1217 Lex.Lex(); 1218 break; 1219 case lltok::lbrace: 1220 // TypeRec ::= '{' ... '}' 1221 if (ParseStructType(Result, false)) 1222 return true; 1223 break; 1224 case lltok::lsquare: 1225 // TypeRec ::= '[' ... ']' 1226 Lex.Lex(); // eat the lsquare. 1227 if (ParseArrayVectorType(Result, false)) 1228 return true; 1229 break; 1230 case lltok::less: // Either vector or packed struct. 1231 // TypeRec ::= '<' ... '>' 1232 Lex.Lex(); 1233 if (Lex.getKind() == lltok::lbrace) { 1234 if (ParseStructType(Result, true) || 1235 ParseToken(lltok::greater, "expected '>' at end of packed struct")) 1236 return true; 1237 } else if (ParseArrayVectorType(Result, true)) 1238 return true; 1239 break; 1240 case lltok::LocalVar: 1241 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0 1242 // TypeRec ::= %foo 1243 if (const Type *T = M->getTypeByName(Lex.getStrVal())) { 1244 Result = T; 1245 } else { 1246 Result = OpaqueType::get(Context); 1247 ForwardRefTypes.insert(std::make_pair(Lex.getStrVal(), 1248 std::make_pair(Result, 1249 Lex.getLoc()))); 1250 M->addTypeName(Lex.getStrVal(), Result.get()); 1251 } 1252 Lex.Lex(); 1253 break; 1254 1255 case lltok::LocalVarID: 1256 // TypeRec ::= %4 1257 if (Lex.getUIntVal() < NumberedTypes.size()) 1258 Result = NumberedTypes[Lex.getUIntVal()]; 1259 else { 1260 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 1261 I = ForwardRefTypeIDs.find(Lex.getUIntVal()); 1262 if (I != ForwardRefTypeIDs.end()) 1263 Result = I->second.first; 1264 else { 1265 Result = OpaqueType::get(Context); 1266 ForwardRefTypeIDs.insert(std::make_pair(Lex.getUIntVal(), 1267 std::make_pair(Result, 1268 Lex.getLoc()))); 1269 } 1270 } 1271 Lex.Lex(); 1272 break; 1273 case lltok::backslash: { 1274 // TypeRec ::= '\' 4 1275 Lex.Lex(); 1276 unsigned Val; 1277 if (ParseUInt32(Val)) return true; 1278 OpaqueType *OT = OpaqueType::get(Context); //Use temporary placeholder. 1279 UpRefs.push_back(UpRefRecord(Lex.getLoc(), Val, OT)); 1280 Result = OT; 1281 break; 1282 } 1283 } 1284 1285 // Parse the type suffixes. 1286 while (1) { 1287 switch (Lex.getKind()) { 1288 // End of type. 1289 default: return false; 1290 1291 // TypeRec ::= TypeRec '*' 1292 case lltok::star: 1293 if (Result.get()->isLabelTy()) 1294 return TokError("basic block pointers are invalid"); 1295 if (Result.get()->isVoidTy()) 1296 return TokError("pointers to void are invalid; use i8* instead"); 1297 if (!PointerType::isValidElementType(Result.get())) 1298 return TokError("pointer to this type is invalid"); 1299 Result = HandleUpRefs(PointerType::getUnqual(Result.get())); 1300 Lex.Lex(); 1301 break; 1302 1303 // TypeRec ::= TypeRec 'addrspace' '(' uint32 ')' '*' 1304 case lltok::kw_addrspace: { 1305 if (Result.get()->isLabelTy()) 1306 return TokError("basic block pointers are invalid"); 1307 if (Result.get()->isVoidTy()) 1308 return TokError("pointers to void are invalid; use i8* instead"); 1309 if (!PointerType::isValidElementType(Result.get())) 1310 return TokError("pointer to this type is invalid"); 1311 unsigned AddrSpace; 1312 if (ParseOptionalAddrSpace(AddrSpace) || 1313 ParseToken(lltok::star, "expected '*' in address space")) 1314 return true; 1315 1316 Result = HandleUpRefs(PointerType::get(Result.get(), AddrSpace)); 1317 break; 1318 } 1319 1320 /// Types '(' ArgTypeListI ')' OptFuncAttrs 1321 case lltok::lparen: 1322 if (ParseFunctionType(Result)) 1323 return true; 1324 break; 1325 } 1326 } 1327} 1328 1329/// ParseParameterList 1330/// ::= '(' ')' 1331/// ::= '(' Arg (',' Arg)* ')' 1332/// Arg 1333/// ::= Type OptionalAttributes Value OptionalAttributes 1334bool LLParser::ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList, 1335 PerFunctionState &PFS) { 1336 if (ParseToken(lltok::lparen, "expected '(' in call")) 1337 return true; 1338 1339 while (Lex.getKind() != lltok::rparen) { 1340 // If this isn't the first argument, we need a comma. 1341 if (!ArgList.empty() && 1342 ParseToken(lltok::comma, "expected ',' in argument list")) 1343 return true; 1344 1345 // Parse the argument. 1346 LocTy ArgLoc; 1347 PATypeHolder ArgTy(Type::getVoidTy(Context)); 1348 unsigned ArgAttrs1, ArgAttrs2; 1349 Value *V; 1350 if (ParseType(ArgTy, ArgLoc) || 1351 ParseOptionalAttrs(ArgAttrs1, 0) || 1352 ParseValue(ArgTy, V, PFS) || 1353 // FIXME: Should not allow attributes after the argument, remove this in 1354 // LLVM 3.0. 1355 ParseOptionalAttrs(ArgAttrs2, 3)) 1356 return true; 1357 ArgList.push_back(ParamInfo(ArgLoc, V, ArgAttrs1|ArgAttrs2)); 1358 } 1359 1360 Lex.Lex(); // Lex the ')'. 1361 return false; 1362} 1363 1364 1365 1366/// ParseArgumentList - Parse the argument list for a function type or function 1367/// prototype. If 'inType' is true then we are parsing a FunctionType. 1368/// ::= '(' ArgTypeListI ')' 1369/// ArgTypeListI 1370/// ::= /*empty*/ 1371/// ::= '...' 1372/// ::= ArgTypeList ',' '...' 1373/// ::= ArgType (',' ArgType)* 1374/// 1375bool LLParser::ParseArgumentList(std::vector<ArgInfo> &ArgList, 1376 bool &isVarArg, bool inType) { 1377 isVarArg = false; 1378 assert(Lex.getKind() == lltok::lparen); 1379 Lex.Lex(); // eat the (. 1380 1381 if (Lex.getKind() == lltok::rparen) { 1382 // empty 1383 } else if (Lex.getKind() == lltok::dotdotdot) { 1384 isVarArg = true; 1385 Lex.Lex(); 1386 } else { 1387 LocTy TypeLoc = Lex.getLoc(); 1388 PATypeHolder ArgTy(Type::getVoidTy(Context)); 1389 unsigned Attrs; 1390 std::string Name; 1391 1392 // If we're parsing a type, use ParseTypeRec, because we allow recursive 1393 // types (such as a function returning a pointer to itself). If parsing a 1394 // function prototype, we require fully resolved types. 1395 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1396 ParseOptionalAttrs(Attrs, 0)) return true; 1397 1398 if (ArgTy->isVoidTy()) 1399 return Error(TypeLoc, "argument can not have void type"); 1400 1401 if (Lex.getKind() == lltok::LocalVar || 1402 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1403 Name = Lex.getStrVal(); 1404 Lex.Lex(); 1405 } 1406 1407 if (!FunctionType::isValidArgumentType(ArgTy)) 1408 return Error(TypeLoc, "invalid type for function argument"); 1409 1410 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1411 1412 while (EatIfPresent(lltok::comma)) { 1413 // Handle ... at end of arg list. 1414 if (EatIfPresent(lltok::dotdotdot)) { 1415 isVarArg = true; 1416 break; 1417 } 1418 1419 // Otherwise must be an argument type. 1420 TypeLoc = Lex.getLoc(); 1421 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1422 ParseOptionalAttrs(Attrs, 0)) return true; 1423 1424 if (ArgTy->isVoidTy()) 1425 return Error(TypeLoc, "argument can not have void type"); 1426 1427 if (Lex.getKind() == lltok::LocalVar || 1428 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1429 Name = Lex.getStrVal(); 1430 Lex.Lex(); 1431 } else { 1432 Name = ""; 1433 } 1434 1435 if (!ArgTy->isFirstClassType() && !isa<OpaqueType>(ArgTy)) 1436 return Error(TypeLoc, "invalid type for function argument"); 1437 1438 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1439 } 1440 } 1441 1442 return ParseToken(lltok::rparen, "expected ')' at end of argument list"); 1443} 1444 1445/// ParseFunctionType 1446/// ::= Type ArgumentList OptionalAttrs 1447bool LLParser::ParseFunctionType(PATypeHolder &Result) { 1448 assert(Lex.getKind() == lltok::lparen); 1449 1450 if (!FunctionType::isValidReturnType(Result)) 1451 return TokError("invalid function return type"); 1452 1453 std::vector<ArgInfo> ArgList; 1454 bool isVarArg; 1455 unsigned Attrs; 1456 if (ParseArgumentList(ArgList, isVarArg, true) || 1457 // FIXME: Allow, but ignore attributes on function types! 1458 // FIXME: Remove in LLVM 3.0 1459 ParseOptionalAttrs(Attrs, 2)) 1460 return true; 1461 1462 // Reject names on the arguments lists. 1463 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 1464 if (!ArgList[i].Name.empty()) 1465 return Error(ArgList[i].Loc, "argument name invalid in function type"); 1466 if (!ArgList[i].Attrs != 0) { 1467 // Allow but ignore attributes on function types; this permits 1468 // auto-upgrade. 1469 // FIXME: REJECT ATTRIBUTES ON FUNCTION TYPES in LLVM 3.0 1470 } 1471 } 1472 1473 std::vector<const Type*> ArgListTy; 1474 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 1475 ArgListTy.push_back(ArgList[i].Type); 1476 1477 Result = HandleUpRefs(FunctionType::get(Result.get(), 1478 ArgListTy, isVarArg)); 1479 return false; 1480} 1481 1482/// ParseStructType: Handles packed and unpacked types. </> parsed elsewhere. 1483/// TypeRec 1484/// ::= '{' '}' 1485/// ::= '{' TypeRec (',' TypeRec)* '}' 1486/// ::= '<' '{' '}' '>' 1487/// ::= '<' '{' TypeRec (',' TypeRec)* '}' '>' 1488bool LLParser::ParseStructType(PATypeHolder &Result, bool Packed) { 1489 assert(Lex.getKind() == lltok::lbrace); 1490 Lex.Lex(); // Consume the '{' 1491 1492 if (EatIfPresent(lltok::rbrace)) { 1493 Result = StructType::get(Context, Packed); 1494 return false; 1495 } 1496 1497 std::vector<PATypeHolder> ParamsList; 1498 LocTy EltTyLoc = Lex.getLoc(); 1499 if (ParseTypeRec(Result)) return true; 1500 ParamsList.push_back(Result); 1501 1502 if (Result->isVoidTy()) 1503 return Error(EltTyLoc, "struct element can not have void type"); 1504 if (!StructType::isValidElementType(Result)) 1505 return Error(EltTyLoc, "invalid element type for struct"); 1506 1507 while (EatIfPresent(lltok::comma)) { 1508 EltTyLoc = Lex.getLoc(); 1509 if (ParseTypeRec(Result)) return true; 1510 1511 if (Result->isVoidTy()) 1512 return Error(EltTyLoc, "struct element can not have void type"); 1513 if (!StructType::isValidElementType(Result)) 1514 return Error(EltTyLoc, "invalid element type for struct"); 1515 1516 ParamsList.push_back(Result); 1517 } 1518 1519 if (ParseToken(lltok::rbrace, "expected '}' at end of struct")) 1520 return true; 1521 1522 std::vector<const Type*> ParamsListTy; 1523 for (unsigned i = 0, e = ParamsList.size(); i != e; ++i) 1524 ParamsListTy.push_back(ParamsList[i].get()); 1525 Result = HandleUpRefs(StructType::get(Context, ParamsListTy, Packed)); 1526 return false; 1527} 1528 1529/// ParseArrayVectorType - Parse an array or vector type, assuming the first 1530/// token has already been consumed. 1531/// TypeRec 1532/// ::= '[' APSINTVAL 'x' Types ']' 1533/// ::= '<' APSINTVAL 'x' Types '>' 1534bool LLParser::ParseArrayVectorType(PATypeHolder &Result, bool isVector) { 1535 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned() || 1536 Lex.getAPSIntVal().getBitWidth() > 64) 1537 return TokError("expected number in address space"); 1538 1539 LocTy SizeLoc = Lex.getLoc(); 1540 uint64_t Size = Lex.getAPSIntVal().getZExtValue(); 1541 Lex.Lex(); 1542 1543 if (ParseToken(lltok::kw_x, "expected 'x' after element count")) 1544 return true; 1545 1546 LocTy TypeLoc = Lex.getLoc(); 1547 PATypeHolder EltTy(Type::getVoidTy(Context)); 1548 if (ParseTypeRec(EltTy)) return true; 1549 1550 if (EltTy->isVoidTy()) 1551 return Error(TypeLoc, "array and vector element type cannot be void"); 1552 1553 if (ParseToken(isVector ? lltok::greater : lltok::rsquare, 1554 "expected end of sequential type")) 1555 return true; 1556 1557 if (isVector) { 1558 if (Size == 0) 1559 return Error(SizeLoc, "zero element vector is illegal"); 1560 if ((unsigned)Size != Size) 1561 return Error(SizeLoc, "size too large for vector"); 1562 if (!VectorType::isValidElementType(EltTy)) 1563 return Error(TypeLoc, "vector element type must be fp or integer"); 1564 Result = VectorType::get(EltTy, unsigned(Size)); 1565 } else { 1566 if (!ArrayType::isValidElementType(EltTy)) 1567 return Error(TypeLoc, "invalid array element type"); 1568 Result = HandleUpRefs(ArrayType::get(EltTy, Size)); 1569 } 1570 return false; 1571} 1572 1573//===----------------------------------------------------------------------===// 1574// Function Semantic Analysis. 1575//===----------------------------------------------------------------------===// 1576 1577LLParser::PerFunctionState::PerFunctionState(LLParser &p, Function &f) 1578 : P(p), F(f) { 1579 1580 // Insert unnamed arguments into the NumberedVals list. 1581 for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 1582 AI != E; ++AI) 1583 if (!AI->hasName()) 1584 NumberedVals.push_back(AI); 1585} 1586 1587LLParser::PerFunctionState::~PerFunctionState() { 1588 // If there were any forward referenced non-basicblock values, delete them. 1589 for (std::map<std::string, std::pair<Value*, LocTy> >::iterator 1590 I = ForwardRefVals.begin(), E = ForwardRefVals.end(); I != E; ++I) 1591 if (!isa<BasicBlock>(I->second.first)) { 1592 I->second.first->replaceAllUsesWith( 1593 UndefValue::get(I->second.first->getType())); 1594 delete I->second.first; 1595 I->second.first = 0; 1596 } 1597 1598 for (std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1599 I = ForwardRefValIDs.begin(), E = ForwardRefValIDs.end(); I != E; ++I) 1600 if (!isa<BasicBlock>(I->second.first)) { 1601 I->second.first->replaceAllUsesWith( 1602 UndefValue::get(I->second.first->getType())); 1603 delete I->second.first; 1604 I->second.first = 0; 1605 } 1606} 1607 1608bool LLParser::PerFunctionState::VerifyFunctionComplete() { 1609 if (!ForwardRefVals.empty()) 1610 return P.Error(ForwardRefVals.begin()->second.second, 1611 "use of undefined value '%" + ForwardRefVals.begin()->first + 1612 "'"); 1613 if (!ForwardRefValIDs.empty()) 1614 return P.Error(ForwardRefValIDs.begin()->second.second, 1615 "use of undefined value '%" + 1616 utostr(ForwardRefValIDs.begin()->first) + "'"); 1617 return false; 1618} 1619 1620 1621/// GetVal - Get a value with the specified name or ID, creating a 1622/// forward reference record if needed. This can return null if the value 1623/// exists but does not have the right type. 1624Value *LLParser::PerFunctionState::GetVal(const std::string &Name, 1625 const Type *Ty, LocTy Loc) { 1626 // Look this name up in the normal function symbol table. 1627 Value *Val = F.getValueSymbolTable().lookup(Name); 1628 1629 // If this is a forward reference for the value, see if we already created a 1630 // forward ref record. 1631 if (Val == 0) { 1632 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1633 I = ForwardRefVals.find(Name); 1634 if (I != ForwardRefVals.end()) 1635 Val = I->second.first; 1636 } 1637 1638 // If we have the value in the symbol table or fwd-ref table, return it. 1639 if (Val) { 1640 if (Val->getType() == Ty) return Val; 1641 if (Ty->isLabelTy()) 1642 P.Error(Loc, "'%" + Name + "' is not a basic block"); 1643 else 1644 P.Error(Loc, "'%" + Name + "' defined with type '" + 1645 Val->getType()->getDescription() + "'"); 1646 return 0; 1647 } 1648 1649 // Don't make placeholders with invalid type. 1650 if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty) && 1651 Ty != Type::getLabelTy(F.getContext())) { 1652 P.Error(Loc, "invalid use of a non-first-class type"); 1653 return 0; 1654 } 1655 1656 // Otherwise, create a new forward reference for this value and remember it. 1657 Value *FwdVal; 1658 if (Ty->isLabelTy()) 1659 FwdVal = BasicBlock::Create(F.getContext(), Name, &F); 1660 else 1661 FwdVal = new Argument(Ty, Name); 1662 1663 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 1664 return FwdVal; 1665} 1666 1667Value *LLParser::PerFunctionState::GetVal(unsigned ID, const Type *Ty, 1668 LocTy Loc) { 1669 // Look this name up in the normal function symbol table. 1670 Value *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 1671 1672 // If this is a forward reference for the value, see if we already created a 1673 // forward ref record. 1674 if (Val == 0) { 1675 std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1676 I = ForwardRefValIDs.find(ID); 1677 if (I != ForwardRefValIDs.end()) 1678 Val = I->second.first; 1679 } 1680 1681 // If we have the value in the symbol table or fwd-ref table, return it. 1682 if (Val) { 1683 if (Val->getType() == Ty) return Val; 1684 if (Ty->isLabelTy()) 1685 P.Error(Loc, "'%" + utostr(ID) + "' is not a basic block"); 1686 else 1687 P.Error(Loc, "'%" + utostr(ID) + "' defined with type '" + 1688 Val->getType()->getDescription() + "'"); 1689 return 0; 1690 } 1691 1692 if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty) && 1693 Ty != Type::getLabelTy(F.getContext())) { 1694 P.Error(Loc, "invalid use of a non-first-class type"); 1695 return 0; 1696 } 1697 1698 // Otherwise, create a new forward reference for this value and remember it. 1699 Value *FwdVal; 1700 if (Ty->isLabelTy()) 1701 FwdVal = BasicBlock::Create(F.getContext(), "", &F); 1702 else 1703 FwdVal = new Argument(Ty); 1704 1705 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 1706 return FwdVal; 1707} 1708 1709/// SetInstName - After an instruction is parsed and inserted into its 1710/// basic block, this installs its name. 1711bool LLParser::PerFunctionState::SetInstName(int NameID, 1712 const std::string &NameStr, 1713 LocTy NameLoc, Instruction *Inst) { 1714 // If this instruction has void type, it cannot have a name or ID specified. 1715 if (Inst->getType()->isVoidTy()) { 1716 if (NameID != -1 || !NameStr.empty()) 1717 return P.Error(NameLoc, "instructions returning void cannot have a name"); 1718 return false; 1719 } 1720 1721 // If this was a numbered instruction, verify that the instruction is the 1722 // expected value and resolve any forward references. 1723 if (NameStr.empty()) { 1724 // If neither a name nor an ID was specified, just use the next ID. 1725 if (NameID == -1) 1726 NameID = NumberedVals.size(); 1727 1728 if (unsigned(NameID) != NumberedVals.size()) 1729 return P.Error(NameLoc, "instruction expected to be numbered '%" + 1730 utostr(NumberedVals.size()) + "'"); 1731 1732 std::map<unsigned, std::pair<Value*, LocTy> >::iterator FI = 1733 ForwardRefValIDs.find(NameID); 1734 if (FI != ForwardRefValIDs.end()) { 1735 if (FI->second.first->getType() != Inst->getType()) 1736 return P.Error(NameLoc, "instruction forward referenced with type '" + 1737 FI->second.first->getType()->getDescription() + "'"); 1738 FI->second.first->replaceAllUsesWith(Inst); 1739 delete FI->second.first; 1740 ForwardRefValIDs.erase(FI); 1741 } 1742 1743 NumberedVals.push_back(Inst); 1744 return false; 1745 } 1746 1747 // Otherwise, the instruction had a name. Resolve forward refs and set it. 1748 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1749 FI = ForwardRefVals.find(NameStr); 1750 if (FI != ForwardRefVals.end()) { 1751 if (FI->second.first->getType() != Inst->getType()) 1752 return P.Error(NameLoc, "instruction forward referenced with type '" + 1753 FI->second.first->getType()->getDescription() + "'"); 1754 FI->second.first->replaceAllUsesWith(Inst); 1755 delete FI->second.first; 1756 ForwardRefVals.erase(FI); 1757 } 1758 1759 // Set the name on the instruction. 1760 Inst->setName(NameStr); 1761 1762 if (Inst->getNameStr() != NameStr) 1763 return P.Error(NameLoc, "multiple definition of local value named '" + 1764 NameStr + "'"); 1765 return false; 1766} 1767 1768/// GetBB - Get a basic block with the specified name or ID, creating a 1769/// forward reference record if needed. 1770BasicBlock *LLParser::PerFunctionState::GetBB(const std::string &Name, 1771 LocTy Loc) { 1772 return cast_or_null<BasicBlock>(GetVal(Name, 1773 Type::getLabelTy(F.getContext()), Loc)); 1774} 1775 1776BasicBlock *LLParser::PerFunctionState::GetBB(unsigned ID, LocTy Loc) { 1777 return cast_or_null<BasicBlock>(GetVal(ID, 1778 Type::getLabelTy(F.getContext()), Loc)); 1779} 1780 1781/// DefineBB - Define the specified basic block, which is either named or 1782/// unnamed. If there is an error, this returns null otherwise it returns 1783/// the block being defined. 1784BasicBlock *LLParser::PerFunctionState::DefineBB(const std::string &Name, 1785 LocTy Loc) { 1786 BasicBlock *BB; 1787 if (Name.empty()) 1788 BB = GetBB(NumberedVals.size(), Loc); 1789 else 1790 BB = GetBB(Name, Loc); 1791 if (BB == 0) return 0; // Already diagnosed error. 1792 1793 // Move the block to the end of the function. Forward ref'd blocks are 1794 // inserted wherever they happen to be referenced. 1795 F.getBasicBlockList().splice(F.end(), F.getBasicBlockList(), BB); 1796 1797 // Remove the block from forward ref sets. 1798 if (Name.empty()) { 1799 ForwardRefValIDs.erase(NumberedVals.size()); 1800 NumberedVals.push_back(BB); 1801 } else { 1802 // BB forward references are already in the function symbol table. 1803 ForwardRefVals.erase(Name); 1804 } 1805 1806 return BB; 1807} 1808 1809//===----------------------------------------------------------------------===// 1810// Constants. 1811//===----------------------------------------------------------------------===// 1812 1813/// ParseValID - Parse an abstract value that doesn't necessarily have a 1814/// type implied. For example, if we parse "4" we don't know what integer type 1815/// it has. The value will later be combined with its type and checked for 1816/// sanity. 1817bool LLParser::ParseValID(ValID &ID) { 1818 ID.Loc = Lex.getLoc(); 1819 switch (Lex.getKind()) { 1820 default: return TokError("expected value token"); 1821 case lltok::GlobalID: // @42 1822 ID.UIntVal = Lex.getUIntVal(); 1823 ID.Kind = ValID::t_GlobalID; 1824 break; 1825 case lltok::GlobalVar: // @foo 1826 ID.StrVal = Lex.getStrVal(); 1827 ID.Kind = ValID::t_GlobalName; 1828 break; 1829 case lltok::LocalVarID: // %42 1830 ID.UIntVal = Lex.getUIntVal(); 1831 ID.Kind = ValID::t_LocalID; 1832 break; 1833 case lltok::LocalVar: // %foo 1834 case lltok::StringConstant: // "foo" - FIXME: REMOVE IN LLVM 3.0 1835 ID.StrVal = Lex.getStrVal(); 1836 ID.Kind = ValID::t_LocalName; 1837 break; 1838 case lltok::Metadata: { // !{...} MDNode, !"foo" MDString 1839 ID.Kind = ValID::t_Metadata; 1840 Lex.Lex(); 1841 if (Lex.getKind() == lltok::lbrace) { 1842 SmallVector<Value*, 16> Elts; 1843 if (ParseMDNodeVector(Elts) || 1844 ParseToken(lltok::rbrace, "expected end of metadata node")) 1845 return true; 1846 1847 ID.MetadataVal = MDNode::get(Context, Elts.data(), Elts.size()); 1848 return false; 1849 } 1850 1851 // Standalone metadata reference 1852 // !{ ..., !42, ... } 1853 if (!ParseMDNode(ID.MetadataVal)) 1854 return false; 1855 1856 // MDString: 1857 // ::= '!' STRINGCONSTANT 1858 if (ParseMDString(ID.MetadataVal)) return true; 1859 ID.Kind = ValID::t_Metadata; 1860 return false; 1861 } 1862 case lltok::APSInt: 1863 ID.APSIntVal = Lex.getAPSIntVal(); 1864 ID.Kind = ValID::t_APSInt; 1865 break; 1866 case lltok::APFloat: 1867 ID.APFloatVal = Lex.getAPFloatVal(); 1868 ID.Kind = ValID::t_APFloat; 1869 break; 1870 case lltok::kw_true: 1871 ID.ConstantVal = ConstantInt::getTrue(Context); 1872 ID.Kind = ValID::t_Constant; 1873 break; 1874 case lltok::kw_false: 1875 ID.ConstantVal = ConstantInt::getFalse(Context); 1876 ID.Kind = ValID::t_Constant; 1877 break; 1878 case lltok::kw_null: ID.Kind = ValID::t_Null; break; 1879 case lltok::kw_undef: ID.Kind = ValID::t_Undef; break; 1880 case lltok::kw_zeroinitializer: ID.Kind = ValID::t_Zero; break; 1881 1882 case lltok::lbrace: { 1883 // ValID ::= '{' ConstVector '}' 1884 Lex.Lex(); 1885 SmallVector<Constant*, 16> Elts; 1886 if (ParseGlobalValueVector(Elts) || 1887 ParseToken(lltok::rbrace, "expected end of struct constant")) 1888 return true; 1889 1890 ID.ConstantVal = ConstantStruct::get(Context, Elts.data(), 1891 Elts.size(), false); 1892 ID.Kind = ValID::t_Constant; 1893 return false; 1894 } 1895 case lltok::less: { 1896 // ValID ::= '<' ConstVector '>' --> Vector. 1897 // ValID ::= '<' '{' ConstVector '}' '>' --> Packed Struct. 1898 Lex.Lex(); 1899 bool isPackedStruct = EatIfPresent(lltok::lbrace); 1900 1901 SmallVector<Constant*, 16> Elts; 1902 LocTy FirstEltLoc = Lex.getLoc(); 1903 if (ParseGlobalValueVector(Elts) || 1904 (isPackedStruct && 1905 ParseToken(lltok::rbrace, "expected end of packed struct")) || 1906 ParseToken(lltok::greater, "expected end of constant")) 1907 return true; 1908 1909 if (isPackedStruct) { 1910 ID.ConstantVal = 1911 ConstantStruct::get(Context, Elts.data(), Elts.size(), true); 1912 ID.Kind = ValID::t_Constant; 1913 return false; 1914 } 1915 1916 if (Elts.empty()) 1917 return Error(ID.Loc, "constant vector must not be empty"); 1918 1919 if (!Elts[0]->getType()->isInteger() && 1920 !Elts[0]->getType()->isFloatingPoint()) 1921 return Error(FirstEltLoc, 1922 "vector elements must have integer or floating point type"); 1923 1924 // Verify that all the vector elements have the same type. 1925 for (unsigned i = 1, e = Elts.size(); i != e; ++i) 1926 if (Elts[i]->getType() != Elts[0]->getType()) 1927 return Error(FirstEltLoc, 1928 "vector element #" + utostr(i) + 1929 " is not of type '" + Elts[0]->getType()->getDescription()); 1930 1931 ID.ConstantVal = ConstantVector::get(Elts.data(), Elts.size()); 1932 ID.Kind = ValID::t_Constant; 1933 return false; 1934 } 1935 case lltok::lsquare: { // Array Constant 1936 Lex.Lex(); 1937 SmallVector<Constant*, 16> Elts; 1938 LocTy FirstEltLoc = Lex.getLoc(); 1939 if (ParseGlobalValueVector(Elts) || 1940 ParseToken(lltok::rsquare, "expected end of array constant")) 1941 return true; 1942 1943 // Handle empty element. 1944 if (Elts.empty()) { 1945 // Use undef instead of an array because it's inconvenient to determine 1946 // the element type at this point, there being no elements to examine. 1947 ID.Kind = ValID::t_EmptyArray; 1948 return false; 1949 } 1950 1951 if (!Elts[0]->getType()->isFirstClassType()) 1952 return Error(FirstEltLoc, "invalid array element type: " + 1953 Elts[0]->getType()->getDescription()); 1954 1955 ArrayType *ATy = ArrayType::get(Elts[0]->getType(), Elts.size()); 1956 1957 // Verify all elements are correct type! 1958 for (unsigned i = 0, e = Elts.size(); i != e; ++i) { 1959 if (Elts[i]->getType() != Elts[0]->getType()) 1960 return Error(FirstEltLoc, 1961 "array element #" + utostr(i) + 1962 " is not of type '" +Elts[0]->getType()->getDescription()); 1963 } 1964 1965 ID.ConstantVal = ConstantArray::get(ATy, Elts.data(), Elts.size()); 1966 ID.Kind = ValID::t_Constant; 1967 return false; 1968 } 1969 case lltok::kw_c: // c "foo" 1970 Lex.Lex(); 1971 ID.ConstantVal = ConstantArray::get(Context, Lex.getStrVal(), false); 1972 if (ParseToken(lltok::StringConstant, "expected string")) return true; 1973 ID.Kind = ValID::t_Constant; 1974 return false; 1975 1976 case lltok::kw_asm: { 1977 // ValID ::= 'asm' SideEffect? AlignStack? STRINGCONSTANT ',' STRINGCONSTANT 1978 bool HasSideEffect, AlignStack; 1979 Lex.Lex(); 1980 if (ParseOptionalToken(lltok::kw_sideeffect, HasSideEffect) || 1981 ParseOptionalToken(lltok::kw_alignstack, AlignStack) || 1982 ParseStringConstant(ID.StrVal) || 1983 ParseToken(lltok::comma, "expected comma in inline asm expression") || 1984 ParseToken(lltok::StringConstant, "expected constraint string")) 1985 return true; 1986 ID.StrVal2 = Lex.getStrVal(); 1987 ID.UIntVal = HasSideEffect | ((unsigned)AlignStack<<1); 1988 ID.Kind = ValID::t_InlineAsm; 1989 return false; 1990 } 1991 1992 case lltok::kw_trunc: 1993 case lltok::kw_zext: 1994 case lltok::kw_sext: 1995 case lltok::kw_fptrunc: 1996 case lltok::kw_fpext: 1997 case lltok::kw_bitcast: 1998 case lltok::kw_uitofp: 1999 case lltok::kw_sitofp: 2000 case lltok::kw_fptoui: 2001 case lltok::kw_fptosi: 2002 case lltok::kw_inttoptr: 2003 case lltok::kw_ptrtoint: { 2004 unsigned Opc = Lex.getUIntVal(); 2005 PATypeHolder DestTy(Type::getVoidTy(Context)); 2006 Constant *SrcVal; 2007 Lex.Lex(); 2008 if (ParseToken(lltok::lparen, "expected '(' after constantexpr cast") || 2009 ParseGlobalTypeAndValue(SrcVal) || 2010 ParseToken(lltok::kw_to, "expected 'to' in constantexpr cast") || 2011 ParseType(DestTy) || 2012 ParseToken(lltok::rparen, "expected ')' at end of constantexpr cast")) 2013 return true; 2014 if (!CastInst::castIsValid((Instruction::CastOps)Opc, SrcVal, DestTy)) 2015 return Error(ID.Loc, "invalid cast opcode for cast from '" + 2016 SrcVal->getType()->getDescription() + "' to '" + 2017 DestTy->getDescription() + "'"); 2018 ID.ConstantVal = ConstantExpr::getCast((Instruction::CastOps)Opc, 2019 SrcVal, DestTy); 2020 ID.Kind = ValID::t_Constant; 2021 return false; 2022 } 2023 case lltok::kw_extractvalue: { 2024 Lex.Lex(); 2025 Constant *Val; 2026 SmallVector<unsigned, 4> Indices; 2027 if (ParseToken(lltok::lparen, "expected '(' in extractvalue constantexpr")|| 2028 ParseGlobalTypeAndValue(Val) || 2029 ParseIndexList(Indices) || 2030 ParseToken(lltok::rparen, "expected ')' in extractvalue constantexpr")) 2031 return true; 2032 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 2033 return Error(ID.Loc, "extractvalue operand must be array or struct"); 2034 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 2035 Indices.end())) 2036 return Error(ID.Loc, "invalid indices for extractvalue"); 2037 ID.ConstantVal = 2038 ConstantExpr::getExtractValue(Val, Indices.data(), Indices.size()); 2039 ID.Kind = ValID::t_Constant; 2040 return false; 2041 } 2042 case lltok::kw_insertvalue: { 2043 Lex.Lex(); 2044 Constant *Val0, *Val1; 2045 SmallVector<unsigned, 4> Indices; 2046 if (ParseToken(lltok::lparen, "expected '(' in insertvalue constantexpr")|| 2047 ParseGlobalTypeAndValue(Val0) || 2048 ParseToken(lltok::comma, "expected comma in insertvalue constantexpr")|| 2049 ParseGlobalTypeAndValue(Val1) || 2050 ParseIndexList(Indices) || 2051 ParseToken(lltok::rparen, "expected ')' in insertvalue constantexpr")) 2052 return true; 2053 if (!isa<StructType>(Val0->getType()) && !isa<ArrayType>(Val0->getType())) 2054 return Error(ID.Loc, "extractvalue operand must be array or struct"); 2055 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 2056 Indices.end())) 2057 return Error(ID.Loc, "invalid indices for insertvalue"); 2058 ID.ConstantVal = ConstantExpr::getInsertValue(Val0, Val1, 2059 Indices.data(), Indices.size()); 2060 ID.Kind = ValID::t_Constant; 2061 return false; 2062 } 2063 case lltok::kw_icmp: 2064 case lltok::kw_fcmp: { 2065 unsigned PredVal, Opc = Lex.getUIntVal(); 2066 Constant *Val0, *Val1; 2067 Lex.Lex(); 2068 if (ParseCmpPredicate(PredVal, Opc) || 2069 ParseToken(lltok::lparen, "expected '(' in compare constantexpr") || 2070 ParseGlobalTypeAndValue(Val0) || 2071 ParseToken(lltok::comma, "expected comma in compare constantexpr") || 2072 ParseGlobalTypeAndValue(Val1) || 2073 ParseToken(lltok::rparen, "expected ')' in compare constantexpr")) 2074 return true; 2075 2076 if (Val0->getType() != Val1->getType()) 2077 return Error(ID.Loc, "compare operands must have the same type"); 2078 2079 CmpInst::Predicate Pred = (CmpInst::Predicate)PredVal; 2080 2081 if (Opc == Instruction::FCmp) { 2082 if (!Val0->getType()->isFPOrFPVector()) 2083 return Error(ID.Loc, "fcmp requires floating point operands"); 2084 ID.ConstantVal = ConstantExpr::getFCmp(Pred, Val0, Val1); 2085 } else { 2086 assert(Opc == Instruction::ICmp && "Unexpected opcode for CmpInst!"); 2087 if (!Val0->getType()->isIntOrIntVector() && 2088 !isa<PointerType>(Val0->getType())) 2089 return Error(ID.Loc, "icmp requires pointer or integer operands"); 2090 ID.ConstantVal = ConstantExpr::getICmp(Pred, Val0, Val1); 2091 } 2092 ID.Kind = ValID::t_Constant; 2093 return false; 2094 } 2095 2096 // Binary Operators. 2097 case lltok::kw_add: 2098 case lltok::kw_fadd: 2099 case lltok::kw_sub: 2100 case lltok::kw_fsub: 2101 case lltok::kw_mul: 2102 case lltok::kw_fmul: 2103 case lltok::kw_udiv: 2104 case lltok::kw_sdiv: 2105 case lltok::kw_fdiv: 2106 case lltok::kw_urem: 2107 case lltok::kw_srem: 2108 case lltok::kw_frem: { 2109 bool NUW = false; 2110 bool NSW = false; 2111 bool Exact = false; 2112 unsigned Opc = Lex.getUIntVal(); 2113 Constant *Val0, *Val1; 2114 Lex.Lex(); 2115 LocTy ModifierLoc = Lex.getLoc(); 2116 if (Opc == Instruction::Add || 2117 Opc == Instruction::Sub || 2118 Opc == Instruction::Mul) { 2119 if (EatIfPresent(lltok::kw_nuw)) 2120 NUW = true; 2121 if (EatIfPresent(lltok::kw_nsw)) { 2122 NSW = true; 2123 if (EatIfPresent(lltok::kw_nuw)) 2124 NUW = true; 2125 } 2126 } else if (Opc == Instruction::SDiv) { 2127 if (EatIfPresent(lltok::kw_exact)) 2128 Exact = true; 2129 } 2130 if (ParseToken(lltok::lparen, "expected '(' in binary constantexpr") || 2131 ParseGlobalTypeAndValue(Val0) || 2132 ParseToken(lltok::comma, "expected comma in binary constantexpr") || 2133 ParseGlobalTypeAndValue(Val1) || 2134 ParseToken(lltok::rparen, "expected ')' in binary constantexpr")) 2135 return true; 2136 if (Val0->getType() != Val1->getType()) 2137 return Error(ID.Loc, "operands of constexpr must have same type"); 2138 if (!Val0->getType()->isIntOrIntVector()) { 2139 if (NUW) 2140 return Error(ModifierLoc, "nuw only applies to integer operations"); 2141 if (NSW) 2142 return Error(ModifierLoc, "nsw only applies to integer operations"); 2143 } 2144 // API compatibility: Accept either integer or floating-point types with 2145 // add, sub, and mul. 2146 if (!Val0->getType()->isIntOrIntVector() && 2147 !Val0->getType()->isFPOrFPVector()) 2148 return Error(ID.Loc,"constexpr requires integer, fp, or vector operands"); 2149 unsigned Flags = 0; 2150 if (NUW) Flags |= OverflowingBinaryOperator::NoUnsignedWrap; 2151 if (NSW) Flags |= OverflowingBinaryOperator::NoSignedWrap; 2152 if (Exact) Flags |= SDivOperator::IsExact; 2153 Constant *C = ConstantExpr::get(Opc, Val0, Val1, Flags); 2154 ID.ConstantVal = C; 2155 ID.Kind = ValID::t_Constant; 2156 return false; 2157 } 2158 2159 // Logical Operations 2160 case lltok::kw_shl: 2161 case lltok::kw_lshr: 2162 case lltok::kw_ashr: 2163 case lltok::kw_and: 2164 case lltok::kw_or: 2165 case lltok::kw_xor: { 2166 unsigned Opc = Lex.getUIntVal(); 2167 Constant *Val0, *Val1; 2168 Lex.Lex(); 2169 if (ParseToken(lltok::lparen, "expected '(' in logical constantexpr") || 2170 ParseGlobalTypeAndValue(Val0) || 2171 ParseToken(lltok::comma, "expected comma in logical constantexpr") || 2172 ParseGlobalTypeAndValue(Val1) || 2173 ParseToken(lltok::rparen, "expected ')' in logical constantexpr")) 2174 return true; 2175 if (Val0->getType() != Val1->getType()) 2176 return Error(ID.Loc, "operands of constexpr must have same type"); 2177 if (!Val0->getType()->isIntOrIntVector()) 2178 return Error(ID.Loc, 2179 "constexpr requires integer or integer vector operands"); 2180 ID.ConstantVal = ConstantExpr::get(Opc, Val0, Val1); 2181 ID.Kind = ValID::t_Constant; 2182 return false; 2183 } 2184 2185 case lltok::kw_getelementptr: 2186 case lltok::kw_shufflevector: 2187 case lltok::kw_insertelement: 2188 case lltok::kw_extractelement: 2189 case lltok::kw_select: { 2190 unsigned Opc = Lex.getUIntVal(); 2191 SmallVector<Constant*, 16> Elts; 2192 bool InBounds = false; 2193 Lex.Lex(); 2194 if (Opc == Instruction::GetElementPtr) 2195 InBounds = EatIfPresent(lltok::kw_inbounds); 2196 if (ParseToken(lltok::lparen, "expected '(' in constantexpr") || 2197 ParseGlobalValueVector(Elts) || 2198 ParseToken(lltok::rparen, "expected ')' in constantexpr")) 2199 return true; 2200 2201 if (Opc == Instruction::GetElementPtr) { 2202 if (Elts.size() == 0 || !isa<PointerType>(Elts[0]->getType())) 2203 return Error(ID.Loc, "getelementptr requires pointer operand"); 2204 2205 if (!GetElementPtrInst::getIndexedType(Elts[0]->getType(), 2206 (Value**)(Elts.data() + 1), 2207 Elts.size() - 1)) 2208 return Error(ID.Loc, "invalid indices for getelementptr"); 2209 ID.ConstantVal = InBounds ? 2210 ConstantExpr::getInBoundsGetElementPtr(Elts[0], 2211 Elts.data() + 1, 2212 Elts.size() - 1) : 2213 ConstantExpr::getGetElementPtr(Elts[0], 2214 Elts.data() + 1, Elts.size() - 1); 2215 } else if (Opc == Instruction::Select) { 2216 if (Elts.size() != 3) 2217 return Error(ID.Loc, "expected three operands to select"); 2218 if (const char *Reason = SelectInst::areInvalidOperands(Elts[0], Elts[1], 2219 Elts[2])) 2220 return Error(ID.Loc, Reason); 2221 ID.ConstantVal = ConstantExpr::getSelect(Elts[0], Elts[1], Elts[2]); 2222 } else if (Opc == Instruction::ShuffleVector) { 2223 if (Elts.size() != 3) 2224 return Error(ID.Loc, "expected three operands to shufflevector"); 2225 if (!ShuffleVectorInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2226 return Error(ID.Loc, "invalid operands to shufflevector"); 2227 ID.ConstantVal = 2228 ConstantExpr::getShuffleVector(Elts[0], Elts[1],Elts[2]); 2229 } else if (Opc == Instruction::ExtractElement) { 2230 if (Elts.size() != 2) 2231 return Error(ID.Loc, "expected two operands to extractelement"); 2232 if (!ExtractElementInst::isValidOperands(Elts[0], Elts[1])) 2233 return Error(ID.Loc, "invalid extractelement operands"); 2234 ID.ConstantVal = ConstantExpr::getExtractElement(Elts[0], Elts[1]); 2235 } else { 2236 assert(Opc == Instruction::InsertElement && "Unknown opcode"); 2237 if (Elts.size() != 3) 2238 return Error(ID.Loc, "expected three operands to insertelement"); 2239 if (!InsertElementInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2240 return Error(ID.Loc, "invalid insertelement operands"); 2241 ID.ConstantVal = 2242 ConstantExpr::getInsertElement(Elts[0], Elts[1],Elts[2]); 2243 } 2244 2245 ID.Kind = ValID::t_Constant; 2246 return false; 2247 } 2248 } 2249 2250 Lex.Lex(); 2251 return false; 2252} 2253 2254/// ParseGlobalValue - Parse a global value with the specified type. 2255bool LLParser::ParseGlobalValue(const Type *Ty, Constant *&V) { 2256 V = 0; 2257 ValID ID; 2258 return ParseValID(ID) || 2259 ConvertGlobalValIDToValue(Ty, ID, V); 2260} 2261 2262/// ConvertGlobalValIDToValue - Apply a type to a ValID to get a fully resolved 2263/// constant. 2264bool LLParser::ConvertGlobalValIDToValue(const Type *Ty, ValID &ID, 2265 Constant *&V) { 2266 if (isa<FunctionType>(Ty)) 2267 return Error(ID.Loc, "functions are not values, refer to them as pointers"); 2268 2269 switch (ID.Kind) { 2270 default: llvm_unreachable("Unknown ValID!"); 2271 case ValID::t_Metadata: 2272 return Error(ID.Loc, "invalid use of metadata"); 2273 case ValID::t_LocalID: 2274 case ValID::t_LocalName: 2275 return Error(ID.Loc, "invalid use of function-local name"); 2276 case ValID::t_InlineAsm: 2277 return Error(ID.Loc, "inline asm can only be an operand of call/invoke"); 2278 case ValID::t_GlobalName: 2279 V = GetGlobalVal(ID.StrVal, Ty, ID.Loc); 2280 return V == 0; 2281 case ValID::t_GlobalID: 2282 V = GetGlobalVal(ID.UIntVal, Ty, ID.Loc); 2283 return V == 0; 2284 case ValID::t_APSInt: 2285 if (!isa<IntegerType>(Ty)) 2286 return Error(ID.Loc, "integer constant must have integer type"); 2287 ID.APSIntVal.extOrTrunc(Ty->getPrimitiveSizeInBits()); 2288 V = ConstantInt::get(Context, ID.APSIntVal); 2289 return false; 2290 case ValID::t_APFloat: 2291 if (!Ty->isFloatingPoint() || 2292 !ConstantFP::isValueValidForType(Ty, ID.APFloatVal)) 2293 return Error(ID.Loc, "floating point constant invalid for type"); 2294 2295 // The lexer has no type info, so builds all float and double FP constants 2296 // as double. Fix this here. Long double does not need this. 2297 if (&ID.APFloatVal.getSemantics() == &APFloat::IEEEdouble && 2298 Ty->isFloatTy()) { 2299 bool Ignored; 2300 ID.APFloatVal.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, 2301 &Ignored); 2302 } 2303 V = ConstantFP::get(Context, ID.APFloatVal); 2304 2305 if (V->getType() != Ty) 2306 return Error(ID.Loc, "floating point constant does not have type '" + 2307 Ty->getDescription() + "'"); 2308 2309 return false; 2310 case ValID::t_Null: 2311 if (!isa<PointerType>(Ty)) 2312 return Error(ID.Loc, "null must be a pointer type"); 2313 V = ConstantPointerNull::get(cast<PointerType>(Ty)); 2314 return false; 2315 case ValID::t_Undef: 2316 // FIXME: LabelTy should not be a first-class type. 2317 if ((!Ty->isFirstClassType() || Ty->isLabelTy()) && 2318 !isa<OpaqueType>(Ty)) 2319 return Error(ID.Loc, "invalid type for undef constant"); 2320 V = UndefValue::get(Ty); 2321 return false; 2322 case ValID::t_EmptyArray: 2323 if (!isa<ArrayType>(Ty) || cast<ArrayType>(Ty)->getNumElements() != 0) 2324 return Error(ID.Loc, "invalid empty array initializer"); 2325 V = UndefValue::get(Ty); 2326 return false; 2327 case ValID::t_Zero: 2328 // FIXME: LabelTy should not be a first-class type. 2329 if (!Ty->isFirstClassType() || Ty->isLabelTy()) 2330 return Error(ID.Loc, "invalid type for null constant"); 2331 V = Constant::getNullValue(Ty); 2332 return false; 2333 case ValID::t_Constant: 2334 if (ID.ConstantVal->getType() != Ty) 2335 return Error(ID.Loc, "constant expression type mismatch"); 2336 V = ID.ConstantVal; 2337 return false; 2338 } 2339} 2340 2341bool LLParser::ParseGlobalTypeAndValue(Constant *&V) { 2342 PATypeHolder Type(Type::getVoidTy(Context)); 2343 return ParseType(Type) || 2344 ParseGlobalValue(Type, V); 2345} 2346 2347/// ParseGlobalValueVector 2348/// ::= /*empty*/ 2349/// ::= TypeAndValue (',' TypeAndValue)* 2350bool LLParser::ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts) { 2351 // Empty list. 2352 if (Lex.getKind() == lltok::rbrace || 2353 Lex.getKind() == lltok::rsquare || 2354 Lex.getKind() == lltok::greater || 2355 Lex.getKind() == lltok::rparen) 2356 return false; 2357 2358 Constant *C; 2359 if (ParseGlobalTypeAndValue(C)) return true; 2360 Elts.push_back(C); 2361 2362 while (EatIfPresent(lltok::comma)) { 2363 if (ParseGlobalTypeAndValue(C)) return true; 2364 Elts.push_back(C); 2365 } 2366 2367 return false; 2368} 2369 2370 2371//===----------------------------------------------------------------------===// 2372// Function Parsing. 2373//===----------------------------------------------------------------------===// 2374 2375bool LLParser::ConvertValIDToValue(const Type *Ty, ValID &ID, Value *&V, 2376 PerFunctionState &PFS) { 2377 if (ID.Kind == ValID::t_LocalID) 2378 V = PFS.GetVal(ID.UIntVal, Ty, ID.Loc); 2379 else if (ID.Kind == ValID::t_LocalName) 2380 V = PFS.GetVal(ID.StrVal, Ty, ID.Loc); 2381 else if (ID.Kind == ValID::t_InlineAsm) { 2382 const PointerType *PTy = dyn_cast<PointerType>(Ty); 2383 const FunctionType *FTy = 2384 PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : 0; 2385 if (!FTy || !InlineAsm::Verify(FTy, ID.StrVal2)) 2386 return Error(ID.Loc, "invalid type for inline asm constraint string"); 2387 V = InlineAsm::get(FTy, ID.StrVal, ID.StrVal2, ID.UIntVal&1, ID.UIntVal>>1); 2388 return false; 2389 } else if (ID.Kind == ValID::t_Metadata) { 2390 V = ID.MetadataVal; 2391 } else { 2392 Constant *C; 2393 if (ConvertGlobalValIDToValue(Ty, ID, C)) return true; 2394 V = C; 2395 return false; 2396 } 2397 2398 return V == 0; 2399} 2400 2401bool LLParser::ParseValue(const Type *Ty, Value *&V, PerFunctionState &PFS) { 2402 V = 0; 2403 ValID ID; 2404 return ParseValID(ID) || 2405 ConvertValIDToValue(Ty, ID, V, PFS); 2406} 2407 2408bool LLParser::ParseTypeAndValue(Value *&V, PerFunctionState &PFS) { 2409 PATypeHolder T(Type::getVoidTy(Context)); 2410 return ParseType(T) || 2411 ParseValue(T, V, PFS); 2412} 2413 2414/// FunctionHeader 2415/// ::= OptionalLinkage OptionalVisibility OptionalCallingConv OptRetAttrs 2416/// Type GlobalName '(' ArgList ')' OptFuncAttrs OptSection 2417/// OptionalAlign OptGC 2418bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) { 2419 // Parse the linkage. 2420 LocTy LinkageLoc = Lex.getLoc(); 2421 unsigned Linkage; 2422 2423 unsigned Visibility, RetAttrs; 2424 CallingConv::ID CC; 2425 PATypeHolder RetType(Type::getVoidTy(Context)); 2426 LocTy RetTypeLoc = Lex.getLoc(); 2427 if (ParseOptionalLinkage(Linkage) || 2428 ParseOptionalVisibility(Visibility) || 2429 ParseOptionalCallingConv(CC) || 2430 ParseOptionalAttrs(RetAttrs, 1) || 2431 ParseType(RetType, RetTypeLoc, true /*void allowed*/)) 2432 return true; 2433 2434 // Verify that the linkage is ok. 2435 switch ((GlobalValue::LinkageTypes)Linkage) { 2436 case GlobalValue::ExternalLinkage: 2437 break; // always ok. 2438 case GlobalValue::DLLImportLinkage: 2439 case GlobalValue::ExternalWeakLinkage: 2440 if (isDefine) 2441 return Error(LinkageLoc, "invalid linkage for function definition"); 2442 break; 2443 case GlobalValue::PrivateLinkage: 2444 case GlobalValue::LinkerPrivateLinkage: 2445 case GlobalValue::InternalLinkage: 2446 case GlobalValue::AvailableExternallyLinkage: 2447 case GlobalValue::LinkOnceAnyLinkage: 2448 case GlobalValue::LinkOnceODRLinkage: 2449 case GlobalValue::WeakAnyLinkage: 2450 case GlobalValue::WeakODRLinkage: 2451 case GlobalValue::DLLExportLinkage: 2452 if (!isDefine) 2453 return Error(LinkageLoc, "invalid linkage for function declaration"); 2454 break; 2455 case GlobalValue::AppendingLinkage: 2456 case GlobalValue::GhostLinkage: 2457 case GlobalValue::CommonLinkage: 2458 return Error(LinkageLoc, "invalid function linkage type"); 2459 } 2460 2461 if (!FunctionType::isValidReturnType(RetType) || 2462 isa<OpaqueType>(RetType)) 2463 return Error(RetTypeLoc, "invalid function return type"); 2464 2465 LocTy NameLoc = Lex.getLoc(); 2466 2467 std::string FunctionName; 2468 if (Lex.getKind() == lltok::GlobalVar) { 2469 FunctionName = Lex.getStrVal(); 2470 } else if (Lex.getKind() == lltok::GlobalID) { // @42 is ok. 2471 unsigned NameID = Lex.getUIntVal(); 2472 2473 if (NameID != NumberedVals.size()) 2474 return TokError("function expected to be numbered '%" + 2475 utostr(NumberedVals.size()) + "'"); 2476 } else { 2477 return TokError("expected function name"); 2478 } 2479 2480 Lex.Lex(); 2481 2482 if (Lex.getKind() != lltok::lparen) 2483 return TokError("expected '(' in function argument list"); 2484 2485 std::vector<ArgInfo> ArgList; 2486 bool isVarArg; 2487 unsigned FuncAttrs; 2488 std::string Section; 2489 unsigned Alignment; 2490 std::string GC; 2491 2492 if (ParseArgumentList(ArgList, isVarArg, false) || 2493 ParseOptionalAttrs(FuncAttrs, 2) || 2494 (EatIfPresent(lltok::kw_section) && 2495 ParseStringConstant(Section)) || 2496 ParseOptionalAlignment(Alignment) || 2497 (EatIfPresent(lltok::kw_gc) && 2498 ParseStringConstant(GC))) 2499 return true; 2500 2501 // If the alignment was parsed as an attribute, move to the alignment field. 2502 if (FuncAttrs & Attribute::Alignment) { 2503 Alignment = Attribute::getAlignmentFromAttrs(FuncAttrs); 2504 FuncAttrs &= ~Attribute::Alignment; 2505 } 2506 2507 // Okay, if we got here, the function is syntactically valid. Convert types 2508 // and do semantic checks. 2509 std::vector<const Type*> ParamTypeList; 2510 SmallVector<AttributeWithIndex, 8> Attrs; 2511 // FIXME : In 3.0, stop accepting zext, sext and inreg as optional function 2512 // attributes. 2513 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 2514 if (FuncAttrs & ObsoleteFuncAttrs) { 2515 RetAttrs |= FuncAttrs & ObsoleteFuncAttrs; 2516 FuncAttrs &= ~ObsoleteFuncAttrs; 2517 } 2518 2519 if (RetAttrs != Attribute::None) 2520 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 2521 2522 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 2523 ParamTypeList.push_back(ArgList[i].Type); 2524 if (ArgList[i].Attrs != Attribute::None) 2525 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 2526 } 2527 2528 if (FuncAttrs != Attribute::None) 2529 Attrs.push_back(AttributeWithIndex::get(~0, FuncAttrs)); 2530 2531 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 2532 2533 if (PAL.paramHasAttr(1, Attribute::StructRet) && 2534 RetType != Type::getVoidTy(Context)) 2535 return Error(RetTypeLoc, "functions with 'sret' argument must return void"); 2536 2537 const FunctionType *FT = 2538 FunctionType::get(RetType, ParamTypeList, isVarArg); 2539 const PointerType *PFT = PointerType::getUnqual(FT); 2540 2541 Fn = 0; 2542 if (!FunctionName.empty()) { 2543 // If this was a definition of a forward reference, remove the definition 2544 // from the forward reference table and fill in the forward ref. 2545 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator FRVI = 2546 ForwardRefVals.find(FunctionName); 2547 if (FRVI != ForwardRefVals.end()) { 2548 Fn = M->getFunction(FunctionName); 2549 ForwardRefVals.erase(FRVI); 2550 } else if ((Fn = M->getFunction(FunctionName))) { 2551 // If this function already exists in the symbol table, then it is 2552 // multiply defined. We accept a few cases for old backwards compat. 2553 // FIXME: Remove this stuff for LLVM 3.0. 2554 if (Fn->getType() != PFT || Fn->getAttributes() != PAL || 2555 (!Fn->isDeclaration() && isDefine)) { 2556 // If the redefinition has different type or different attributes, 2557 // reject it. If both have bodies, reject it. 2558 return Error(NameLoc, "invalid redefinition of function '" + 2559 FunctionName + "'"); 2560 } else if (Fn->isDeclaration()) { 2561 // Make sure to strip off any argument names so we can't get conflicts. 2562 for (Function::arg_iterator AI = Fn->arg_begin(), AE = Fn->arg_end(); 2563 AI != AE; ++AI) 2564 AI->setName(""); 2565 } 2566 } 2567 2568 } else { 2569 // If this is a definition of a forward referenced function, make sure the 2570 // types agree. 2571 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator I 2572 = ForwardRefValIDs.find(NumberedVals.size()); 2573 if (I != ForwardRefValIDs.end()) { 2574 Fn = cast<Function>(I->second.first); 2575 if (Fn->getType() != PFT) 2576 return Error(NameLoc, "type of definition and forward reference of '@" + 2577 utostr(NumberedVals.size()) +"' disagree"); 2578 ForwardRefValIDs.erase(I); 2579 } 2580 } 2581 2582 if (Fn == 0) 2583 Fn = Function::Create(FT, GlobalValue::ExternalLinkage, FunctionName, M); 2584 else // Move the forward-reference to the correct spot in the module. 2585 M->getFunctionList().splice(M->end(), M->getFunctionList(), Fn); 2586 2587 if (FunctionName.empty()) 2588 NumberedVals.push_back(Fn); 2589 2590 Fn->setLinkage((GlobalValue::LinkageTypes)Linkage); 2591 Fn->setVisibility((GlobalValue::VisibilityTypes)Visibility); 2592 Fn->setCallingConv(CC); 2593 Fn->setAttributes(PAL); 2594 Fn->setAlignment(Alignment); 2595 Fn->setSection(Section); 2596 if (!GC.empty()) Fn->setGC(GC.c_str()); 2597 2598 // Add all of the arguments we parsed to the function. 2599 Function::arg_iterator ArgIt = Fn->arg_begin(); 2600 for (unsigned i = 0, e = ArgList.size(); i != e; ++i, ++ArgIt) { 2601 // If the argument has a name, insert it into the argument symbol table. 2602 if (ArgList[i].Name.empty()) continue; 2603 2604 // Set the name, if it conflicted, it will be auto-renamed. 2605 ArgIt->setName(ArgList[i].Name); 2606 2607 if (ArgIt->getNameStr() != ArgList[i].Name) 2608 return Error(ArgList[i].Loc, "redefinition of argument '%" + 2609 ArgList[i].Name + "'"); 2610 } 2611 2612 return false; 2613} 2614 2615 2616/// ParseFunctionBody 2617/// ::= '{' BasicBlock+ '}' 2618/// ::= 'begin' BasicBlock+ 'end' // FIXME: remove in LLVM 3.0 2619/// 2620bool LLParser::ParseFunctionBody(Function &Fn) { 2621 if (Lex.getKind() != lltok::lbrace && Lex.getKind() != lltok::kw_begin) 2622 return TokError("expected '{' in function body"); 2623 Lex.Lex(); // eat the {. 2624 2625 PerFunctionState PFS(*this, Fn); 2626 2627 while (Lex.getKind() != lltok::rbrace && Lex.getKind() != lltok::kw_end) 2628 if (ParseBasicBlock(PFS)) return true; 2629 2630 // Eat the }. 2631 Lex.Lex(); 2632 2633 // Verify function is ok. 2634 return PFS.VerifyFunctionComplete(); 2635} 2636 2637/// ParseBasicBlock 2638/// ::= LabelStr? Instruction* 2639bool LLParser::ParseBasicBlock(PerFunctionState &PFS) { 2640 // If this basic block starts out with a name, remember it. 2641 std::string Name; 2642 LocTy NameLoc = Lex.getLoc(); 2643 if (Lex.getKind() == lltok::LabelStr) { 2644 Name = Lex.getStrVal(); 2645 Lex.Lex(); 2646 } 2647 2648 BasicBlock *BB = PFS.DefineBB(Name, NameLoc); 2649 if (BB == 0) return true; 2650 2651 std::string NameStr; 2652 2653 // Parse the instructions in this block until we get a terminator. 2654 Instruction *Inst; 2655 do { 2656 // This instruction may have three possibilities for a name: a) none 2657 // specified, b) name specified "%foo =", c) number specified: "%4 =". 2658 LocTy NameLoc = Lex.getLoc(); 2659 int NameID = -1; 2660 NameStr = ""; 2661 2662 if (Lex.getKind() == lltok::LocalVarID) { 2663 NameID = Lex.getUIntVal(); 2664 Lex.Lex(); 2665 if (ParseToken(lltok::equal, "expected '=' after instruction id")) 2666 return true; 2667 } else if (Lex.getKind() == lltok::LocalVar || 2668 // FIXME: REMOVE IN LLVM 3.0 2669 Lex.getKind() == lltok::StringConstant) { 2670 NameStr = Lex.getStrVal(); 2671 Lex.Lex(); 2672 if (ParseToken(lltok::equal, "expected '=' after instruction name")) 2673 return true; 2674 } 2675 2676 if (ParseInstruction(Inst, BB, PFS)) return true; 2677 if (EatIfPresent(lltok::comma)) 2678 ParseOptionalCustomMetadata(); 2679 2680 // Set metadata attached with this instruction. 2681 MetadataContext &TheMetadata = M->getContext().getMetadata(); 2682 for (SmallVector<std::pair<unsigned, MDNode *>, 2>::iterator 2683 MDI = MDsOnInst.begin(), MDE = MDsOnInst.end(); MDI != MDE; ++MDI) 2684 TheMetadata.addMD(MDI->first, MDI->second, Inst); 2685 MDsOnInst.clear(); 2686 2687 BB->getInstList().push_back(Inst); 2688 2689 // Set the name on the instruction. 2690 if (PFS.SetInstName(NameID, NameStr, NameLoc, Inst)) return true; 2691 } while (!isa<TerminatorInst>(Inst)); 2692 2693 return false; 2694} 2695 2696//===----------------------------------------------------------------------===// 2697// Instruction Parsing. 2698//===----------------------------------------------------------------------===// 2699 2700/// ParseInstruction - Parse one of the many different instructions. 2701/// 2702bool LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB, 2703 PerFunctionState &PFS) { 2704 lltok::Kind Token = Lex.getKind(); 2705 if (Token == lltok::Eof) 2706 return TokError("found end of file when expecting more instructions"); 2707 LocTy Loc = Lex.getLoc(); 2708 unsigned KeywordVal = Lex.getUIntVal(); 2709 Lex.Lex(); // Eat the keyword. 2710 2711 switch (Token) { 2712 default: return Error(Loc, "expected instruction opcode"); 2713 // Terminator Instructions. 2714 case lltok::kw_unwind: Inst = new UnwindInst(Context); return false; 2715 case lltok::kw_unreachable: Inst = new UnreachableInst(Context); return false; 2716 case lltok::kw_ret: return ParseRet(Inst, BB, PFS); 2717 case lltok::kw_br: return ParseBr(Inst, PFS); 2718 case lltok::kw_switch: return ParseSwitch(Inst, PFS); 2719 case lltok::kw_invoke: return ParseInvoke(Inst, PFS); 2720 // Binary Operators. 2721 case lltok::kw_add: 2722 case lltok::kw_sub: 2723 case lltok::kw_mul: { 2724 bool NUW = false; 2725 bool NSW = false; 2726 LocTy ModifierLoc = Lex.getLoc(); 2727 if (EatIfPresent(lltok::kw_nuw)) 2728 NUW = true; 2729 if (EatIfPresent(lltok::kw_nsw)) { 2730 NSW = true; 2731 if (EatIfPresent(lltok::kw_nuw)) 2732 NUW = true; 2733 } 2734 // API compatibility: Accept either integer or floating-point types. 2735 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 0); 2736 if (!Result) { 2737 if (!Inst->getType()->isIntOrIntVector()) { 2738 if (NUW) 2739 return Error(ModifierLoc, "nuw only applies to integer operations"); 2740 if (NSW) 2741 return Error(ModifierLoc, "nsw only applies to integer operations"); 2742 } 2743 if (NUW) 2744 cast<BinaryOperator>(Inst)->setHasNoUnsignedWrap(true); 2745 if (NSW) 2746 cast<BinaryOperator>(Inst)->setHasNoSignedWrap(true); 2747 } 2748 return Result; 2749 } 2750 case lltok::kw_fadd: 2751 case lltok::kw_fsub: 2752 case lltok::kw_fmul: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2753 2754 case lltok::kw_sdiv: { 2755 bool Exact = false; 2756 if (EatIfPresent(lltok::kw_exact)) 2757 Exact = true; 2758 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 1); 2759 if (!Result) 2760 if (Exact) 2761 cast<BinaryOperator>(Inst)->setIsExact(true); 2762 return Result; 2763 } 2764 2765 case lltok::kw_udiv: 2766 case lltok::kw_urem: 2767 case lltok::kw_srem: return ParseArithmetic(Inst, PFS, KeywordVal, 1); 2768 case lltok::kw_fdiv: 2769 case lltok::kw_frem: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2770 case lltok::kw_shl: 2771 case lltok::kw_lshr: 2772 case lltok::kw_ashr: 2773 case lltok::kw_and: 2774 case lltok::kw_or: 2775 case lltok::kw_xor: return ParseLogical(Inst, PFS, KeywordVal); 2776 case lltok::kw_icmp: 2777 case lltok::kw_fcmp: return ParseCompare(Inst, PFS, KeywordVal); 2778 // Casts. 2779 case lltok::kw_trunc: 2780 case lltok::kw_zext: 2781 case lltok::kw_sext: 2782 case lltok::kw_fptrunc: 2783 case lltok::kw_fpext: 2784 case lltok::kw_bitcast: 2785 case lltok::kw_uitofp: 2786 case lltok::kw_sitofp: 2787 case lltok::kw_fptoui: 2788 case lltok::kw_fptosi: 2789 case lltok::kw_inttoptr: 2790 case lltok::kw_ptrtoint: return ParseCast(Inst, PFS, KeywordVal); 2791 // Other. 2792 case lltok::kw_select: return ParseSelect(Inst, PFS); 2793 case lltok::kw_va_arg: return ParseVA_Arg(Inst, PFS); 2794 case lltok::kw_extractelement: return ParseExtractElement(Inst, PFS); 2795 case lltok::kw_insertelement: return ParseInsertElement(Inst, PFS); 2796 case lltok::kw_shufflevector: return ParseShuffleVector(Inst, PFS); 2797 case lltok::kw_phi: return ParsePHI(Inst, PFS); 2798 case lltok::kw_call: return ParseCall(Inst, PFS, false); 2799 case lltok::kw_tail: return ParseCall(Inst, PFS, true); 2800 // Memory. 2801 case lltok::kw_alloca: return ParseAlloc(Inst, PFS); 2802 case lltok::kw_malloc: return ParseAlloc(Inst, PFS, BB, false); 2803 case lltok::kw_free: return ParseFree(Inst, PFS, BB); 2804 case lltok::kw_load: return ParseLoad(Inst, PFS, false); 2805 case lltok::kw_store: return ParseStore(Inst, PFS, false); 2806 case lltok::kw_volatile: 2807 if (EatIfPresent(lltok::kw_load)) 2808 return ParseLoad(Inst, PFS, true); 2809 else if (EatIfPresent(lltok::kw_store)) 2810 return ParseStore(Inst, PFS, true); 2811 else 2812 return TokError("expected 'load' or 'store'"); 2813 case lltok::kw_getresult: return ParseGetResult(Inst, PFS); 2814 case lltok::kw_getelementptr: return ParseGetElementPtr(Inst, PFS); 2815 case lltok::kw_extractvalue: return ParseExtractValue(Inst, PFS); 2816 case lltok::kw_insertvalue: return ParseInsertValue(Inst, PFS); 2817 } 2818} 2819 2820/// ParseCmpPredicate - Parse an integer or fp predicate, based on Kind. 2821bool LLParser::ParseCmpPredicate(unsigned &P, unsigned Opc) { 2822 if (Opc == Instruction::FCmp) { 2823 switch (Lex.getKind()) { 2824 default: TokError("expected fcmp predicate (e.g. 'oeq')"); 2825 case lltok::kw_oeq: P = CmpInst::FCMP_OEQ; break; 2826 case lltok::kw_one: P = CmpInst::FCMP_ONE; break; 2827 case lltok::kw_olt: P = CmpInst::FCMP_OLT; break; 2828 case lltok::kw_ogt: P = CmpInst::FCMP_OGT; break; 2829 case lltok::kw_ole: P = CmpInst::FCMP_OLE; break; 2830 case lltok::kw_oge: P = CmpInst::FCMP_OGE; break; 2831 case lltok::kw_ord: P = CmpInst::FCMP_ORD; break; 2832 case lltok::kw_uno: P = CmpInst::FCMP_UNO; break; 2833 case lltok::kw_ueq: P = CmpInst::FCMP_UEQ; break; 2834 case lltok::kw_une: P = CmpInst::FCMP_UNE; break; 2835 case lltok::kw_ult: P = CmpInst::FCMP_ULT; break; 2836 case lltok::kw_ugt: P = CmpInst::FCMP_UGT; break; 2837 case lltok::kw_ule: P = CmpInst::FCMP_ULE; break; 2838 case lltok::kw_uge: P = CmpInst::FCMP_UGE; break; 2839 case lltok::kw_true: P = CmpInst::FCMP_TRUE; break; 2840 case lltok::kw_false: P = CmpInst::FCMP_FALSE; break; 2841 } 2842 } else { 2843 switch (Lex.getKind()) { 2844 default: TokError("expected icmp predicate (e.g. 'eq')"); 2845 case lltok::kw_eq: P = CmpInst::ICMP_EQ; break; 2846 case lltok::kw_ne: P = CmpInst::ICMP_NE; break; 2847 case lltok::kw_slt: P = CmpInst::ICMP_SLT; break; 2848 case lltok::kw_sgt: P = CmpInst::ICMP_SGT; break; 2849 case lltok::kw_sle: P = CmpInst::ICMP_SLE; break; 2850 case lltok::kw_sge: P = CmpInst::ICMP_SGE; break; 2851 case lltok::kw_ult: P = CmpInst::ICMP_ULT; break; 2852 case lltok::kw_ugt: P = CmpInst::ICMP_UGT; break; 2853 case lltok::kw_ule: P = CmpInst::ICMP_ULE; break; 2854 case lltok::kw_uge: P = CmpInst::ICMP_UGE; break; 2855 } 2856 } 2857 Lex.Lex(); 2858 return false; 2859} 2860 2861//===----------------------------------------------------------------------===// 2862// Terminator Instructions. 2863//===----------------------------------------------------------------------===// 2864 2865/// ParseRet - Parse a return instruction. 2866/// ::= 'ret' void (',' !dbg, !1) 2867/// ::= 'ret' TypeAndValue (',' !dbg, !1) 2868/// ::= 'ret' TypeAndValue (',' TypeAndValue)+ (',' !dbg, !1) 2869/// [[obsolete: LLVM 3.0]] 2870bool LLParser::ParseRet(Instruction *&Inst, BasicBlock *BB, 2871 PerFunctionState &PFS) { 2872 PATypeHolder Ty(Type::getVoidTy(Context)); 2873 if (ParseType(Ty, true /*void allowed*/)) return true; 2874 2875 if (Ty->isVoidTy()) { 2876 Inst = ReturnInst::Create(Context); 2877 return false; 2878 } 2879 2880 Value *RV; 2881 if (ParseValue(Ty, RV, PFS)) return true; 2882 2883 if (EatIfPresent(lltok::comma)) { 2884 // Parse optional custom metadata, e.g. !dbg 2885 if (Lex.getKind() == lltok::NamedOrCustomMD) { 2886 if (ParseOptionalCustomMetadata()) return true; 2887 } else { 2888 // The normal case is one return value. 2889 // FIXME: LLVM 3.0 remove MRV support for 'ret i32 1, i32 2', requiring use 2890 // of 'ret {i32,i32} {i32 1, i32 2}' 2891 SmallVector<Value*, 8> RVs; 2892 RVs.push_back(RV); 2893 2894 do { 2895 // If optional custom metadata, e.g. !dbg is seen then this is the 2896 // end of MRV. 2897 if (Lex.getKind() == lltok::NamedOrCustomMD) 2898 break; 2899 if (ParseTypeAndValue(RV, PFS)) return true; 2900 RVs.push_back(RV); 2901 } while (EatIfPresent(lltok::comma)); 2902 2903 RV = UndefValue::get(PFS.getFunction().getReturnType()); 2904 for (unsigned i = 0, e = RVs.size(); i != e; ++i) { 2905 Instruction *I = InsertValueInst::Create(RV, RVs[i], i, "mrv"); 2906 BB->getInstList().push_back(I); 2907 RV = I; 2908 } 2909 } 2910 } 2911 2912 Inst = ReturnInst::Create(Context, RV); 2913 return false; 2914} 2915 2916 2917/// ParseBr 2918/// ::= 'br' TypeAndValue 2919/// ::= 'br' TypeAndValue ',' TypeAndValue ',' TypeAndValue 2920bool LLParser::ParseBr(Instruction *&Inst, PerFunctionState &PFS) { 2921 LocTy Loc, Loc2; 2922 Value *Op0, *Op1, *Op2; 2923 if (ParseTypeAndValue(Op0, Loc, PFS)) return true; 2924 2925 if (BasicBlock *BB = dyn_cast<BasicBlock>(Op0)) { 2926 Inst = BranchInst::Create(BB); 2927 return false; 2928 } 2929 2930 if (Op0->getType() != Type::getInt1Ty(Context)) 2931 return Error(Loc, "branch condition must have 'i1' type"); 2932 2933 if (ParseToken(lltok::comma, "expected ',' after branch condition") || 2934 ParseTypeAndValue(Op1, Loc, PFS) || 2935 ParseToken(lltok::comma, "expected ',' after true destination") || 2936 ParseTypeAndValue(Op2, Loc2, PFS)) 2937 return true; 2938 2939 if (!isa<BasicBlock>(Op1)) 2940 return Error(Loc, "true destination of branch must be a basic block"); 2941 if (!isa<BasicBlock>(Op2)) 2942 return Error(Loc2, "true destination of branch must be a basic block"); 2943 2944 Inst = BranchInst::Create(cast<BasicBlock>(Op1), cast<BasicBlock>(Op2), Op0); 2945 return false; 2946} 2947 2948/// ParseSwitch 2949/// Instruction 2950/// ::= 'switch' TypeAndValue ',' TypeAndValue '[' JumpTable ']' 2951/// JumpTable 2952/// ::= (TypeAndValue ',' TypeAndValue)* 2953bool LLParser::ParseSwitch(Instruction *&Inst, PerFunctionState &PFS) { 2954 LocTy CondLoc, BBLoc; 2955 Value *Cond, *DefaultBB; 2956 if (ParseTypeAndValue(Cond, CondLoc, PFS) || 2957 ParseToken(lltok::comma, "expected ',' after switch condition") || 2958 ParseTypeAndValue(DefaultBB, BBLoc, PFS) || 2959 ParseToken(lltok::lsquare, "expected '[' with switch table")) 2960 return true; 2961 2962 if (!isa<IntegerType>(Cond->getType())) 2963 return Error(CondLoc, "switch condition must have integer type"); 2964 if (!isa<BasicBlock>(DefaultBB)) 2965 return Error(BBLoc, "default destination must be a basic block"); 2966 2967 // Parse the jump table pairs. 2968 SmallPtrSet<Value*, 32> SeenCases; 2969 SmallVector<std::pair<ConstantInt*, BasicBlock*>, 32> Table; 2970 while (Lex.getKind() != lltok::rsquare) { 2971 Value *Constant, *DestBB; 2972 2973 if (ParseTypeAndValue(Constant, CondLoc, PFS) || 2974 ParseToken(lltok::comma, "expected ',' after case value") || 2975 ParseTypeAndValue(DestBB, BBLoc, PFS)) 2976 return true; 2977 2978 if (!SeenCases.insert(Constant)) 2979 return Error(CondLoc, "duplicate case value in switch"); 2980 if (!isa<ConstantInt>(Constant)) 2981 return Error(CondLoc, "case value is not a constant integer"); 2982 if (!isa<BasicBlock>(DestBB)) 2983 return Error(BBLoc, "case destination is not a basic block"); 2984 2985 Table.push_back(std::make_pair(cast<ConstantInt>(Constant), 2986 cast<BasicBlock>(DestBB))); 2987 } 2988 2989 Lex.Lex(); // Eat the ']'. 2990 2991 SwitchInst *SI = SwitchInst::Create(Cond, cast<BasicBlock>(DefaultBB), 2992 Table.size()); 2993 for (unsigned i = 0, e = Table.size(); i != e; ++i) 2994 SI->addCase(Table[i].first, Table[i].second); 2995 Inst = SI; 2996 return false; 2997} 2998 2999/// ParseInvoke 3000/// ::= 'invoke' OptionalCallingConv OptionalAttrs Type Value ParamList 3001/// OptionalAttrs 'to' TypeAndValue 'unwind' TypeAndValue 3002bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) { 3003 LocTy CallLoc = Lex.getLoc(); 3004 unsigned RetAttrs, FnAttrs; 3005 CallingConv::ID CC; 3006 PATypeHolder RetType(Type::getVoidTy(Context)); 3007 LocTy RetTypeLoc; 3008 ValID CalleeID; 3009 SmallVector<ParamInfo, 16> ArgList; 3010 3011 Value *NormalBB, *UnwindBB; 3012 if (ParseOptionalCallingConv(CC) || 3013 ParseOptionalAttrs(RetAttrs, 1) || 3014 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3015 ParseValID(CalleeID) || 3016 ParseParameterList(ArgList, PFS) || 3017 ParseOptionalAttrs(FnAttrs, 2) || 3018 ParseToken(lltok::kw_to, "expected 'to' in invoke") || 3019 ParseTypeAndValue(NormalBB, PFS) || 3020 ParseToken(lltok::kw_unwind, "expected 'unwind' in invoke") || 3021 ParseTypeAndValue(UnwindBB, PFS)) 3022 return true; 3023 3024 if (!isa<BasicBlock>(NormalBB)) 3025 return Error(CallLoc, "normal destination is not a basic block"); 3026 if (!isa<BasicBlock>(UnwindBB)) 3027 return Error(CallLoc, "unwind destination is not a basic block"); 3028 3029 // If RetType is a non-function pointer type, then this is the short syntax 3030 // for the call, which means that RetType is just the return type. Infer the 3031 // rest of the function argument types from the arguments that are present. 3032 const PointerType *PFTy = 0; 3033 const FunctionType *Ty = 0; 3034 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3035 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3036 // Pull out the types of all of the arguments... 3037 std::vector<const Type*> ParamTypes; 3038 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3039 ParamTypes.push_back(ArgList[i].V->getType()); 3040 3041 if (!FunctionType::isValidReturnType(RetType)) 3042 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3043 3044 Ty = FunctionType::get(RetType, ParamTypes, false); 3045 PFTy = PointerType::getUnqual(Ty); 3046 } 3047 3048 // Look up the callee. 3049 Value *Callee; 3050 if (ConvertValIDToValue(PFTy, CalleeID, Callee, PFS)) return true; 3051 3052 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 3053 // function attributes. 3054 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 3055 if (FnAttrs & ObsoleteFuncAttrs) { 3056 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 3057 FnAttrs &= ~ObsoleteFuncAttrs; 3058 } 3059 3060 // Set up the Attributes for the function. 3061 SmallVector<AttributeWithIndex, 8> Attrs; 3062 if (RetAttrs != Attribute::None) 3063 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3064 3065 SmallVector<Value*, 8> Args; 3066 3067 // Loop through FunctionType's arguments and ensure they are specified 3068 // correctly. Also, gather any parameter attributes. 3069 FunctionType::param_iterator I = Ty->param_begin(); 3070 FunctionType::param_iterator E = Ty->param_end(); 3071 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3072 const Type *ExpectedTy = 0; 3073 if (I != E) { 3074 ExpectedTy = *I++; 3075 } else if (!Ty->isVarArg()) { 3076 return Error(ArgList[i].Loc, "too many arguments specified"); 3077 } 3078 3079 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3080 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3081 ExpectedTy->getDescription() + "'"); 3082 Args.push_back(ArgList[i].V); 3083 if (ArgList[i].Attrs != Attribute::None) 3084 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3085 } 3086 3087 if (I != E) 3088 return Error(CallLoc, "not enough parameters specified for call"); 3089 3090 if (FnAttrs != Attribute::None) 3091 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3092 3093 // Finish off the Attributes and check them 3094 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3095 3096 InvokeInst *II = InvokeInst::Create(Callee, cast<BasicBlock>(NormalBB), 3097 cast<BasicBlock>(UnwindBB), 3098 Args.begin(), Args.end()); 3099 II->setCallingConv(CC); 3100 II->setAttributes(PAL); 3101 Inst = II; 3102 return false; 3103} 3104 3105 3106 3107//===----------------------------------------------------------------------===// 3108// Binary Operators. 3109//===----------------------------------------------------------------------===// 3110 3111/// ParseArithmetic 3112/// ::= ArithmeticOps TypeAndValue ',' Value 3113/// 3114/// If OperandType is 0, then any FP or integer operand is allowed. If it is 1, 3115/// then any integer operand is allowed, if it is 2, any fp operand is allowed. 3116bool LLParser::ParseArithmetic(Instruction *&Inst, PerFunctionState &PFS, 3117 unsigned Opc, unsigned OperandType) { 3118 LocTy Loc; Value *LHS, *RHS; 3119 if (ParseTypeAndValue(LHS, Loc, PFS) || 3120 ParseToken(lltok::comma, "expected ',' in arithmetic operation") || 3121 ParseValue(LHS->getType(), RHS, PFS)) 3122 return true; 3123 3124 bool Valid; 3125 switch (OperandType) { 3126 default: llvm_unreachable("Unknown operand type!"); 3127 case 0: // int or FP. 3128 Valid = LHS->getType()->isIntOrIntVector() || 3129 LHS->getType()->isFPOrFPVector(); 3130 break; 3131 case 1: Valid = LHS->getType()->isIntOrIntVector(); break; 3132 case 2: Valid = LHS->getType()->isFPOrFPVector(); break; 3133 } 3134 3135 if (!Valid) 3136 return Error(Loc, "invalid operand type for instruction"); 3137 3138 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3139 return false; 3140} 3141 3142/// ParseLogical 3143/// ::= ArithmeticOps TypeAndValue ',' Value { 3144bool LLParser::ParseLogical(Instruction *&Inst, PerFunctionState &PFS, 3145 unsigned Opc) { 3146 LocTy Loc; Value *LHS, *RHS; 3147 if (ParseTypeAndValue(LHS, Loc, PFS) || 3148 ParseToken(lltok::comma, "expected ',' in logical operation") || 3149 ParseValue(LHS->getType(), RHS, PFS)) 3150 return true; 3151 3152 if (!LHS->getType()->isIntOrIntVector()) 3153 return Error(Loc,"instruction requires integer or integer vector operands"); 3154 3155 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3156 return false; 3157} 3158 3159 3160/// ParseCompare 3161/// ::= 'icmp' IPredicates TypeAndValue ',' Value 3162/// ::= 'fcmp' FPredicates TypeAndValue ',' Value 3163bool LLParser::ParseCompare(Instruction *&Inst, PerFunctionState &PFS, 3164 unsigned Opc) { 3165 // Parse the integer/fp comparison predicate. 3166 LocTy Loc; 3167 unsigned Pred; 3168 Value *LHS, *RHS; 3169 if (ParseCmpPredicate(Pred, Opc) || 3170 ParseTypeAndValue(LHS, Loc, PFS) || 3171 ParseToken(lltok::comma, "expected ',' after compare value") || 3172 ParseValue(LHS->getType(), RHS, PFS)) 3173 return true; 3174 3175 if (Opc == Instruction::FCmp) { 3176 if (!LHS->getType()->isFPOrFPVector()) 3177 return Error(Loc, "fcmp requires floating point operands"); 3178 Inst = new FCmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3179 } else { 3180 assert(Opc == Instruction::ICmp && "Unknown opcode for CmpInst!"); 3181 if (!LHS->getType()->isIntOrIntVector() && 3182 !isa<PointerType>(LHS->getType())) 3183 return Error(Loc, "icmp requires integer operands"); 3184 Inst = new ICmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3185 } 3186 return false; 3187} 3188 3189//===----------------------------------------------------------------------===// 3190// Other Instructions. 3191//===----------------------------------------------------------------------===// 3192 3193 3194/// ParseCast 3195/// ::= CastOpc TypeAndValue 'to' Type 3196bool LLParser::ParseCast(Instruction *&Inst, PerFunctionState &PFS, 3197 unsigned Opc) { 3198 LocTy Loc; Value *Op; 3199 PATypeHolder DestTy(Type::getVoidTy(Context)); 3200 if (ParseTypeAndValue(Op, Loc, PFS) || 3201 ParseToken(lltok::kw_to, "expected 'to' after cast value") || 3202 ParseType(DestTy)) 3203 return true; 3204 3205 if (!CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy)) { 3206 CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy); 3207 return Error(Loc, "invalid cast opcode for cast from '" + 3208 Op->getType()->getDescription() + "' to '" + 3209 DestTy->getDescription() + "'"); 3210 } 3211 Inst = CastInst::Create((Instruction::CastOps)Opc, Op, DestTy); 3212 return false; 3213} 3214 3215/// ParseSelect 3216/// ::= 'select' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3217bool LLParser::ParseSelect(Instruction *&Inst, PerFunctionState &PFS) { 3218 LocTy Loc; 3219 Value *Op0, *Op1, *Op2; 3220 if (ParseTypeAndValue(Op0, Loc, PFS) || 3221 ParseToken(lltok::comma, "expected ',' after select condition") || 3222 ParseTypeAndValue(Op1, PFS) || 3223 ParseToken(lltok::comma, "expected ',' after select value") || 3224 ParseTypeAndValue(Op2, PFS)) 3225 return true; 3226 3227 if (const char *Reason = SelectInst::areInvalidOperands(Op0, Op1, Op2)) 3228 return Error(Loc, Reason); 3229 3230 Inst = SelectInst::Create(Op0, Op1, Op2); 3231 return false; 3232} 3233 3234/// ParseVA_Arg 3235/// ::= 'va_arg' TypeAndValue ',' Type 3236bool LLParser::ParseVA_Arg(Instruction *&Inst, PerFunctionState &PFS) { 3237 Value *Op; 3238 PATypeHolder EltTy(Type::getVoidTy(Context)); 3239 LocTy TypeLoc; 3240 if (ParseTypeAndValue(Op, PFS) || 3241 ParseToken(lltok::comma, "expected ',' after vaarg operand") || 3242 ParseType(EltTy, TypeLoc)) 3243 return true; 3244 3245 if (!EltTy->isFirstClassType()) 3246 return Error(TypeLoc, "va_arg requires operand with first class type"); 3247 3248 Inst = new VAArgInst(Op, EltTy); 3249 return false; 3250} 3251 3252/// ParseExtractElement 3253/// ::= 'extractelement' TypeAndValue ',' TypeAndValue 3254bool LLParser::ParseExtractElement(Instruction *&Inst, PerFunctionState &PFS) { 3255 LocTy Loc; 3256 Value *Op0, *Op1; 3257 if (ParseTypeAndValue(Op0, Loc, PFS) || 3258 ParseToken(lltok::comma, "expected ',' after extract value") || 3259 ParseTypeAndValue(Op1, PFS)) 3260 return true; 3261 3262 if (!ExtractElementInst::isValidOperands(Op0, Op1)) 3263 return Error(Loc, "invalid extractelement operands"); 3264 3265 Inst = ExtractElementInst::Create(Op0, Op1); 3266 return false; 3267} 3268 3269/// ParseInsertElement 3270/// ::= 'insertelement' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3271bool LLParser::ParseInsertElement(Instruction *&Inst, PerFunctionState &PFS) { 3272 LocTy Loc; 3273 Value *Op0, *Op1, *Op2; 3274 if (ParseTypeAndValue(Op0, Loc, PFS) || 3275 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3276 ParseTypeAndValue(Op1, PFS) || 3277 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3278 ParseTypeAndValue(Op2, PFS)) 3279 return true; 3280 3281 if (!InsertElementInst::isValidOperands(Op0, Op1, Op2)) 3282 return Error(Loc, "invalid insertelement operands"); 3283 3284 Inst = InsertElementInst::Create(Op0, Op1, Op2); 3285 return false; 3286} 3287 3288/// ParseShuffleVector 3289/// ::= 'shufflevector' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3290bool LLParser::ParseShuffleVector(Instruction *&Inst, PerFunctionState &PFS) { 3291 LocTy Loc; 3292 Value *Op0, *Op1, *Op2; 3293 if (ParseTypeAndValue(Op0, Loc, PFS) || 3294 ParseToken(lltok::comma, "expected ',' after shuffle mask") || 3295 ParseTypeAndValue(Op1, PFS) || 3296 ParseToken(lltok::comma, "expected ',' after shuffle value") || 3297 ParseTypeAndValue(Op2, PFS)) 3298 return true; 3299 3300 if (!ShuffleVectorInst::isValidOperands(Op0, Op1, Op2)) 3301 return Error(Loc, "invalid extractelement operands"); 3302 3303 Inst = new ShuffleVectorInst(Op0, Op1, Op2); 3304 return false; 3305} 3306 3307/// ParsePHI 3308/// ::= 'phi' Type '[' Value ',' Value ']' (',' '[' Value ',' Value ']')* 3309bool LLParser::ParsePHI(Instruction *&Inst, PerFunctionState &PFS) { 3310 PATypeHolder Ty(Type::getVoidTy(Context)); 3311 Value *Op0, *Op1; 3312 LocTy TypeLoc = Lex.getLoc(); 3313 3314 if (ParseType(Ty) || 3315 ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3316 ParseValue(Ty, Op0, PFS) || 3317 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3318 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3319 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3320 return true; 3321 3322 SmallVector<std::pair<Value*, BasicBlock*>, 16> PHIVals; 3323 while (1) { 3324 PHIVals.push_back(std::make_pair(Op0, cast<BasicBlock>(Op1))); 3325 3326 if (!EatIfPresent(lltok::comma)) 3327 break; 3328 3329 if (Lex.getKind() == lltok::NamedOrCustomMD) 3330 break; 3331 3332 if (ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3333 ParseValue(Ty, Op0, PFS) || 3334 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3335 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3336 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3337 return true; 3338 } 3339 3340 if (Lex.getKind() == lltok::NamedOrCustomMD) 3341 if (ParseOptionalCustomMetadata()) return true; 3342 3343 if (!Ty->isFirstClassType()) 3344 return Error(TypeLoc, "phi node must have first class type"); 3345 3346 PHINode *PN = PHINode::Create(Ty); 3347 PN->reserveOperandSpace(PHIVals.size()); 3348 for (unsigned i = 0, e = PHIVals.size(); i != e; ++i) 3349 PN->addIncoming(PHIVals[i].first, PHIVals[i].second); 3350 Inst = PN; 3351 return false; 3352} 3353 3354/// ParseCall 3355/// ::= 'tail'? 'call' OptionalCallingConv OptionalAttrs Type Value 3356/// ParameterList OptionalAttrs 3357bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS, 3358 bool isTail) { 3359 unsigned RetAttrs, FnAttrs; 3360 CallingConv::ID CC; 3361 PATypeHolder RetType(Type::getVoidTy(Context)); 3362 LocTy RetTypeLoc; 3363 ValID CalleeID; 3364 SmallVector<ParamInfo, 16> ArgList; 3365 LocTy CallLoc = Lex.getLoc(); 3366 3367 if ((isTail && ParseToken(lltok::kw_call, "expected 'tail call'")) || 3368 ParseOptionalCallingConv(CC) || 3369 ParseOptionalAttrs(RetAttrs, 1) || 3370 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3371 ParseValID(CalleeID) || 3372 ParseParameterList(ArgList, PFS) || 3373 ParseOptionalAttrs(FnAttrs, 2)) 3374 return true; 3375 3376 // If RetType is a non-function pointer type, then this is the short syntax 3377 // for the call, which means that RetType is just the return type. Infer the 3378 // rest of the function argument types from the arguments that are present. 3379 const PointerType *PFTy = 0; 3380 const FunctionType *Ty = 0; 3381 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3382 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3383 // Pull out the types of all of the arguments... 3384 std::vector<const Type*> ParamTypes; 3385 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3386 ParamTypes.push_back(ArgList[i].V->getType()); 3387 3388 if (!FunctionType::isValidReturnType(RetType)) 3389 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3390 3391 Ty = FunctionType::get(RetType, ParamTypes, false); 3392 PFTy = PointerType::getUnqual(Ty); 3393 } 3394 3395 // Look up the callee. 3396 Value *Callee; 3397 if (ConvertValIDToValue(PFTy, CalleeID, Callee, PFS)) return true; 3398 3399 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 3400 // function attributes. 3401 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 3402 if (FnAttrs & ObsoleteFuncAttrs) { 3403 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 3404 FnAttrs &= ~ObsoleteFuncAttrs; 3405 } 3406 3407 // Set up the Attributes for the function. 3408 SmallVector<AttributeWithIndex, 8> Attrs; 3409 if (RetAttrs != Attribute::None) 3410 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3411 3412 SmallVector<Value*, 8> Args; 3413 3414 // Loop through FunctionType's arguments and ensure they are specified 3415 // correctly. Also, gather any parameter attributes. 3416 FunctionType::param_iterator I = Ty->param_begin(); 3417 FunctionType::param_iterator E = Ty->param_end(); 3418 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3419 const Type *ExpectedTy = 0; 3420 if (I != E) { 3421 ExpectedTy = *I++; 3422 } else if (!Ty->isVarArg()) { 3423 return Error(ArgList[i].Loc, "too many arguments specified"); 3424 } 3425 3426 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3427 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3428 ExpectedTy->getDescription() + "'"); 3429 Args.push_back(ArgList[i].V); 3430 if (ArgList[i].Attrs != Attribute::None) 3431 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3432 } 3433 3434 if (I != E) 3435 return Error(CallLoc, "not enough parameters specified for call"); 3436 3437 if (FnAttrs != Attribute::None) 3438 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3439 3440 // Finish off the Attributes and check them 3441 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3442 3443 CallInst *CI = CallInst::Create(Callee, Args.begin(), Args.end()); 3444 CI->setTailCall(isTail); 3445 CI->setCallingConv(CC); 3446 CI->setAttributes(PAL); 3447 Inst = CI; 3448 return false; 3449} 3450 3451//===----------------------------------------------------------------------===// 3452// Memory Instructions. 3453//===----------------------------------------------------------------------===// 3454 3455/// ParseAlloc 3456/// ::= 'malloc' Type (',' TypeAndValue)? (',' OptionalInfo)? 3457/// ::= 'alloca' Type (',' TypeAndValue)? (',' OptionalInfo)? 3458bool LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS, 3459 BasicBlock* BB, bool isAlloca) { 3460 PATypeHolder Ty(Type::getVoidTy(Context)); 3461 Value *Size = 0; 3462 LocTy SizeLoc; 3463 unsigned Alignment = 0; 3464 if (ParseType(Ty)) return true; 3465 3466 if (EatIfPresent(lltok::comma)) { 3467 if (Lex.getKind() == lltok::kw_align 3468 || Lex.getKind() == lltok::NamedOrCustomMD) { 3469 if (ParseOptionalInfo(Alignment)) return true; 3470 } else { 3471 if (ParseTypeAndValue(Size, SizeLoc, PFS)) return true; 3472 if (EatIfPresent(lltok::comma)) 3473 if (ParseOptionalInfo(Alignment)) return true; 3474 } 3475 } 3476 3477 if (Size && Size->getType() != Type::getInt32Ty(Context)) 3478 return Error(SizeLoc, "element count must be i32"); 3479 3480 if (isAlloca) { 3481 Inst = new AllocaInst(Ty, Size, Alignment); 3482 return false; 3483 } 3484 3485 // Autoupgrade old malloc instruction to malloc call. 3486 // FIXME: Remove in LLVM 3.0. 3487 const Type *IntPtrTy = Type::getInt32Ty(Context); 3488 if (!MallocF) 3489 // Prototype malloc as "void *(int32)". 3490 // This function is renamed as "malloc" in ValidateEndOfModule(). 3491 MallocF = cast<Function>( 3492 M->getOrInsertFunction("", Type::getInt8PtrTy(Context), IntPtrTy, NULL)); 3493 Inst = CallInst::CreateMalloc(BB, IntPtrTy, Ty, Size, MallocF); 3494 return false; 3495} 3496 3497/// ParseFree 3498/// ::= 'free' TypeAndValue 3499bool LLParser::ParseFree(Instruction *&Inst, PerFunctionState &PFS, 3500 BasicBlock* BB) { 3501 Value *Val; LocTy Loc; 3502 if (ParseTypeAndValue(Val, Loc, PFS)) return true; 3503 if (!isa<PointerType>(Val->getType())) 3504 return Error(Loc, "operand to free must be a pointer"); 3505 Inst = CallInst::CreateFree(Val, BB); 3506 return false; 3507} 3508 3509/// ParseLoad 3510/// ::= 'volatile'? 'load' TypeAndValue (',' OptionalInfo)? 3511bool LLParser::ParseLoad(Instruction *&Inst, PerFunctionState &PFS, 3512 bool isVolatile) { 3513 Value *Val; LocTy Loc; 3514 unsigned Alignment = 0; 3515 if (ParseTypeAndValue(Val, Loc, PFS)) return true; 3516 3517 if (EatIfPresent(lltok::comma)) 3518 if (ParseOptionalInfo(Alignment)) return true; 3519 3520 if (!isa<PointerType>(Val->getType()) || 3521 !cast<PointerType>(Val->getType())->getElementType()->isFirstClassType()) 3522 return Error(Loc, "load operand must be a pointer to a first class type"); 3523 3524 Inst = new LoadInst(Val, "", isVolatile, Alignment); 3525 return false; 3526} 3527 3528/// ParseStore 3529/// ::= 'volatile'? 'store' TypeAndValue ',' TypeAndValue (',' 'align' i32)? 3530bool LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS, 3531 bool isVolatile) { 3532 Value *Val, *Ptr; LocTy Loc, PtrLoc; 3533 unsigned Alignment = 0; 3534 if (ParseTypeAndValue(Val, Loc, PFS) || 3535 ParseToken(lltok::comma, "expected ',' after store operand") || 3536 ParseTypeAndValue(Ptr, PtrLoc, PFS)) 3537 return true; 3538 3539 if (EatIfPresent(lltok::comma)) 3540 if (ParseOptionalInfo(Alignment)) return true; 3541 3542 if (!isa<PointerType>(Ptr->getType())) 3543 return Error(PtrLoc, "store operand must be a pointer"); 3544 if (!Val->getType()->isFirstClassType()) 3545 return Error(Loc, "store operand must be a first class value"); 3546 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType()) 3547 return Error(Loc, "stored value and pointer type do not match"); 3548 3549 Inst = new StoreInst(Val, Ptr, isVolatile, Alignment); 3550 return false; 3551} 3552 3553/// ParseGetResult 3554/// ::= 'getresult' TypeAndValue ',' i32 3555/// FIXME: Remove support for getresult in LLVM 3.0 3556bool LLParser::ParseGetResult(Instruction *&Inst, PerFunctionState &PFS) { 3557 Value *Val; LocTy ValLoc, EltLoc; 3558 unsigned Element; 3559 if (ParseTypeAndValue(Val, ValLoc, PFS) || 3560 ParseToken(lltok::comma, "expected ',' after getresult operand") || 3561 ParseUInt32(Element, EltLoc)) 3562 return true; 3563 3564 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 3565 return Error(ValLoc, "getresult inst requires an aggregate operand"); 3566 if (!ExtractValueInst::getIndexedType(Val->getType(), Element)) 3567 return Error(EltLoc, "invalid getresult index for value"); 3568 Inst = ExtractValueInst::Create(Val, Element); 3569 return false; 3570} 3571 3572/// ParseGetElementPtr 3573/// ::= 'getelementptr' 'inbounds'? TypeAndValue (',' TypeAndValue)* 3574bool LLParser::ParseGetElementPtr(Instruction *&Inst, PerFunctionState &PFS) { 3575 Value *Ptr, *Val; LocTy Loc, EltLoc; 3576 3577 bool InBounds = EatIfPresent(lltok::kw_inbounds); 3578 3579 if (ParseTypeAndValue(Ptr, Loc, PFS)) return true; 3580 3581 if (!isa<PointerType>(Ptr->getType())) 3582 return Error(Loc, "base of getelementptr must be a pointer"); 3583 3584 SmallVector<Value*, 16> Indices; 3585 while (EatIfPresent(lltok::comma)) { 3586 if (Lex.getKind() == lltok::NamedOrCustomMD) 3587 break; 3588 if (ParseTypeAndValue(Val, EltLoc, PFS)) return true; 3589 if (!isa<IntegerType>(Val->getType())) 3590 return Error(EltLoc, "getelementptr index must be an integer"); 3591 Indices.push_back(Val); 3592 } 3593 if (Lex.getKind() == lltok::NamedOrCustomMD) 3594 if (ParseOptionalCustomMetadata()) return true; 3595 3596 if (!GetElementPtrInst::getIndexedType(Ptr->getType(), 3597 Indices.begin(), Indices.end())) 3598 return Error(Loc, "invalid getelementptr indices"); 3599 Inst = GetElementPtrInst::Create(Ptr, Indices.begin(), Indices.end()); 3600 if (InBounds) 3601 cast<GetElementPtrInst>(Inst)->setIsInBounds(true); 3602 return false; 3603} 3604 3605/// ParseExtractValue 3606/// ::= 'extractvalue' TypeAndValue (',' uint32)+ 3607bool LLParser::ParseExtractValue(Instruction *&Inst, PerFunctionState &PFS) { 3608 Value *Val; LocTy Loc; 3609 SmallVector<unsigned, 4> Indices; 3610 if (ParseTypeAndValue(Val, Loc, PFS) || 3611 ParseIndexList(Indices)) 3612 return true; 3613 3614 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 3615 return Error(Loc, "extractvalue operand must be array or struct"); 3616 3617 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 3618 Indices.end())) 3619 return Error(Loc, "invalid indices for extractvalue"); 3620 Inst = ExtractValueInst::Create(Val, Indices.begin(), Indices.end()); 3621 return false; 3622} 3623 3624/// ParseInsertValue 3625/// ::= 'insertvalue' TypeAndValue ',' TypeAndValue (',' uint32)+ 3626bool LLParser::ParseInsertValue(Instruction *&Inst, PerFunctionState &PFS) { 3627 Value *Val0, *Val1; LocTy Loc0, Loc1; 3628 SmallVector<unsigned, 4> Indices; 3629 if (ParseTypeAndValue(Val0, Loc0, PFS) || 3630 ParseToken(lltok::comma, "expected comma after insertvalue operand") || 3631 ParseTypeAndValue(Val1, Loc1, PFS) || 3632 ParseIndexList(Indices)) 3633 return true; 3634 3635 if (!isa<StructType>(Val0->getType()) && !isa<ArrayType>(Val0->getType())) 3636 return Error(Loc0, "extractvalue operand must be array or struct"); 3637 3638 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 3639 Indices.end())) 3640 return Error(Loc0, "invalid indices for insertvalue"); 3641 Inst = InsertValueInst::Create(Val0, Val1, Indices.begin(), Indices.end()); 3642 return false; 3643} 3644 3645//===----------------------------------------------------------------------===// 3646// Embedded metadata. 3647//===----------------------------------------------------------------------===// 3648 3649/// ParseMDNodeVector 3650/// ::= Element (',' Element)* 3651/// Element 3652/// ::= 'null' | TypeAndValue 3653bool LLParser::ParseMDNodeVector(SmallVectorImpl<Value*> &Elts) { 3654 assert(Lex.getKind() == lltok::lbrace); 3655 Lex.Lex(); 3656 do { 3657 Value *V = 0; 3658 if (Lex.getKind() == lltok::kw_null) { 3659 Lex.Lex(); 3660 V = 0; 3661 } else { 3662 PATypeHolder Ty(Type::getVoidTy(Context)); 3663 if (ParseType(Ty)) return true; 3664 if (Lex.getKind() == lltok::Metadata) { 3665 Lex.Lex(); 3666 MetadataBase *Node = 0; 3667 if (!ParseMDNode(Node)) 3668 V = Node; 3669 else { 3670 MetadataBase *MDS = 0; 3671 if (ParseMDString(MDS)) return true; 3672 V = MDS; 3673 } 3674 } else { 3675 Constant *C; 3676 if (ParseGlobalValue(Ty, C)) return true; 3677 V = C; 3678 } 3679 } 3680 Elts.push_back(V); 3681 } while (EatIfPresent(lltok::comma)); 3682 3683 return false; 3684} 3685