LLParser.cpp revision 2fdf8dbed5661336059f647700e66bca1f4cd51a
1//===-- LLParser.cpp - Parser Class ---------------------------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the parser class for .ll files. 11// 12//===----------------------------------------------------------------------===// 13 14#include "LLParser.h" 15#include "llvm/AutoUpgrade.h" 16#include "llvm/CallingConv.h" 17#include "llvm/Constants.h" 18#include "llvm/DerivedTypes.h" 19#include "llvm/InlineAsm.h" 20#include "llvm/Instructions.h" 21#include "llvm/Module.h" 22#include "llvm/Operator.h" 23#include "llvm/ValueSymbolTable.h" 24#include "llvm/ADT/SmallPtrSet.h" 25#include "llvm/ADT/StringExtras.h" 26#include "llvm/Support/ErrorHandling.h" 27#include "llvm/Support/raw_ostream.h" 28using namespace llvm; 29 30/// Run: module ::= toplevelentity* 31bool LLParser::Run() { 32 // Prime the lexer. 33 Lex.Lex(); 34 35 return ParseTopLevelEntities() || 36 ValidateEndOfModule(); 37} 38 39/// ValidateEndOfModule - Do final validity and sanity checks at the end of the 40/// module. 41bool LLParser::ValidateEndOfModule() { 42 // Update auto-upgraded malloc calls to "malloc". 43 // FIXME: Remove in LLVM 3.0. 44 if (MallocF) { 45 MallocF->setName("malloc"); 46 // If setName() does not set the name to "malloc", then there is already a 47 // declaration of "malloc". In that case, iterate over all calls to MallocF 48 // and get them to call the declared "malloc" instead. 49 if (MallocF->getName() != "malloc") { 50 Constant *RealMallocF = M->getFunction("malloc"); 51 if (RealMallocF->getType() != MallocF->getType()) 52 RealMallocF = ConstantExpr::getBitCast(RealMallocF, MallocF->getType()); 53 MallocF->replaceAllUsesWith(RealMallocF); 54 MallocF->eraseFromParent(); 55 MallocF = NULL; 56 } 57 } 58 59 60 // If there are entries in ForwardRefBlockAddresses at this point, they are 61 // references after the function was defined. Resolve those now. 62 while (!ForwardRefBlockAddresses.empty()) { 63 // Okay, we are referencing an already-parsed function, resolve them now. 64 Function *TheFn = 0; 65 const ValID &Fn = ForwardRefBlockAddresses.begin()->first; 66 if (Fn.Kind == ValID::t_GlobalName) 67 TheFn = M->getFunction(Fn.StrVal); 68 else if (Fn.UIntVal < NumberedVals.size()) 69 TheFn = dyn_cast<Function>(NumberedVals[Fn.UIntVal]); 70 71 if (TheFn == 0) 72 return Error(Fn.Loc, "unknown function referenced by blockaddress"); 73 74 // Resolve all these references. 75 if (ResolveForwardRefBlockAddresses(TheFn, 76 ForwardRefBlockAddresses.begin()->second, 77 0)) 78 return true; 79 80 ForwardRefBlockAddresses.erase(ForwardRefBlockAddresses.begin()); 81 } 82 83 84 if (!ForwardRefTypes.empty()) 85 return Error(ForwardRefTypes.begin()->second.second, 86 "use of undefined type named '" + 87 ForwardRefTypes.begin()->first + "'"); 88 if (!ForwardRefTypeIDs.empty()) 89 return Error(ForwardRefTypeIDs.begin()->second.second, 90 "use of undefined type '%" + 91 utostr(ForwardRefTypeIDs.begin()->first) + "'"); 92 93 if (!ForwardRefVals.empty()) 94 return Error(ForwardRefVals.begin()->second.second, 95 "use of undefined value '@" + ForwardRefVals.begin()->first + 96 "'"); 97 98 if (!ForwardRefValIDs.empty()) 99 return Error(ForwardRefValIDs.begin()->second.second, 100 "use of undefined value '@" + 101 utostr(ForwardRefValIDs.begin()->first) + "'"); 102 103 if (!ForwardRefMDNodes.empty()) 104 return Error(ForwardRefMDNodes.begin()->second.second, 105 "use of undefined metadata '!" + 106 utostr(ForwardRefMDNodes.begin()->first) + "'"); 107 108 109 // Look for intrinsic functions and CallInst that need to be upgraded 110 for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ) 111 UpgradeCallsToIntrinsic(FI++); // must be post-increment, as we remove 112 113 // Check debug info intrinsics. 114 CheckDebugInfoIntrinsics(M); 115 return false; 116} 117 118bool LLParser::ResolveForwardRefBlockAddresses(Function *TheFn, 119 std::vector<std::pair<ValID, GlobalValue*> > &Refs, 120 PerFunctionState *PFS) { 121 // Loop over all the references, resolving them. 122 for (unsigned i = 0, e = Refs.size(); i != e; ++i) { 123 BasicBlock *Res; 124 if (PFS) { 125 if (Refs[i].first.Kind == ValID::t_LocalName) 126 Res = PFS->GetBB(Refs[i].first.StrVal, Refs[i].first.Loc); 127 else 128 Res = PFS->GetBB(Refs[i].first.UIntVal, Refs[i].first.Loc); 129 } else if (Refs[i].first.Kind == ValID::t_LocalID) { 130 return Error(Refs[i].first.Loc, 131 "cannot take address of numeric label after the function is defined"); 132 } else { 133 Res = dyn_cast_or_null<BasicBlock>( 134 TheFn->getValueSymbolTable().lookup(Refs[i].first.StrVal)); 135 } 136 137 if (Res == 0) 138 return Error(Refs[i].first.Loc, 139 "referenced value is not a basic block"); 140 141 // Get the BlockAddress for this and update references to use it. 142 BlockAddress *BA = BlockAddress::get(TheFn, Res); 143 Refs[i].second->replaceAllUsesWith(BA); 144 Refs[i].second->eraseFromParent(); 145 } 146 return false; 147} 148 149 150//===----------------------------------------------------------------------===// 151// Top-Level Entities 152//===----------------------------------------------------------------------===// 153 154bool LLParser::ParseTopLevelEntities() { 155 while (1) { 156 switch (Lex.getKind()) { 157 default: return TokError("expected top-level entity"); 158 case lltok::Eof: return false; 159 //case lltok::kw_define: 160 case lltok::kw_declare: if (ParseDeclare()) return true; break; 161 case lltok::kw_define: if (ParseDefine()) return true; break; 162 case lltok::kw_module: if (ParseModuleAsm()) return true; break; 163 case lltok::kw_target: if (ParseTargetDefinition()) return true; break; 164 case lltok::kw_deplibs: if (ParseDepLibs()) return true; break; 165 case lltok::kw_type: if (ParseUnnamedType()) return true; break; 166 case lltok::LocalVarID: if (ParseUnnamedType()) return true; break; 167 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0 168 case lltok::LocalVar: if (ParseNamedType()) return true; break; 169 case lltok::GlobalID: if (ParseUnnamedGlobal()) return true; break; 170 case lltok::GlobalVar: if (ParseNamedGlobal()) return true; break; 171 case lltok::exclaim: if (ParseStandaloneMetadata()) return true; break; 172 case lltok::MetadataVar: if (ParseNamedMetadata()) return true; break; 173 174 // The Global variable production with no name can have many different 175 // optional leading prefixes, the production is: 176 // GlobalVar ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 177 // OptionalAddrSpace ('constant'|'global') ... 178 case lltok::kw_private : // OptionalLinkage 179 case lltok::kw_linker_private: // OptionalLinkage 180 case lltok::kw_internal: // OptionalLinkage 181 case lltok::kw_weak: // OptionalLinkage 182 case lltok::kw_weak_odr: // OptionalLinkage 183 case lltok::kw_linkonce: // OptionalLinkage 184 case lltok::kw_linkonce_odr: // OptionalLinkage 185 case lltok::kw_appending: // OptionalLinkage 186 case lltok::kw_dllexport: // OptionalLinkage 187 case lltok::kw_common: // OptionalLinkage 188 case lltok::kw_dllimport: // OptionalLinkage 189 case lltok::kw_extern_weak: // OptionalLinkage 190 case lltok::kw_external: { // OptionalLinkage 191 unsigned Linkage, Visibility; 192 if (ParseOptionalLinkage(Linkage) || 193 ParseOptionalVisibility(Visibility) || 194 ParseGlobal("", SMLoc(), Linkage, true, Visibility)) 195 return true; 196 break; 197 } 198 case lltok::kw_default: // OptionalVisibility 199 case lltok::kw_hidden: // OptionalVisibility 200 case lltok::kw_protected: { // OptionalVisibility 201 unsigned Visibility; 202 if (ParseOptionalVisibility(Visibility) || 203 ParseGlobal("", SMLoc(), 0, false, Visibility)) 204 return true; 205 break; 206 } 207 208 case lltok::kw_thread_local: // OptionalThreadLocal 209 case lltok::kw_addrspace: // OptionalAddrSpace 210 case lltok::kw_constant: // GlobalType 211 case lltok::kw_global: // GlobalType 212 if (ParseGlobal("", SMLoc(), 0, false, 0)) return true; 213 break; 214 } 215 } 216} 217 218 219/// toplevelentity 220/// ::= 'module' 'asm' STRINGCONSTANT 221bool LLParser::ParseModuleAsm() { 222 assert(Lex.getKind() == lltok::kw_module); 223 Lex.Lex(); 224 225 std::string AsmStr; 226 if (ParseToken(lltok::kw_asm, "expected 'module asm'") || 227 ParseStringConstant(AsmStr)) return true; 228 229 const std::string &AsmSoFar = M->getModuleInlineAsm(); 230 if (AsmSoFar.empty()) 231 M->setModuleInlineAsm(AsmStr); 232 else 233 M->setModuleInlineAsm(AsmSoFar+"\n"+AsmStr); 234 return false; 235} 236 237/// toplevelentity 238/// ::= 'target' 'triple' '=' STRINGCONSTANT 239/// ::= 'target' 'datalayout' '=' STRINGCONSTANT 240bool LLParser::ParseTargetDefinition() { 241 assert(Lex.getKind() == lltok::kw_target); 242 std::string Str; 243 switch (Lex.Lex()) { 244 default: return TokError("unknown target property"); 245 case lltok::kw_triple: 246 Lex.Lex(); 247 if (ParseToken(lltok::equal, "expected '=' after target triple") || 248 ParseStringConstant(Str)) 249 return true; 250 M->setTargetTriple(Str); 251 return false; 252 case lltok::kw_datalayout: 253 Lex.Lex(); 254 if (ParseToken(lltok::equal, "expected '=' after target datalayout") || 255 ParseStringConstant(Str)) 256 return true; 257 M->setDataLayout(Str); 258 return false; 259 } 260} 261 262/// toplevelentity 263/// ::= 'deplibs' '=' '[' ']' 264/// ::= 'deplibs' '=' '[' STRINGCONSTANT (',' STRINGCONSTANT)* ']' 265bool LLParser::ParseDepLibs() { 266 assert(Lex.getKind() == lltok::kw_deplibs); 267 Lex.Lex(); 268 if (ParseToken(lltok::equal, "expected '=' after deplibs") || 269 ParseToken(lltok::lsquare, "expected '=' after deplibs")) 270 return true; 271 272 if (EatIfPresent(lltok::rsquare)) 273 return false; 274 275 std::string Str; 276 if (ParseStringConstant(Str)) return true; 277 M->addLibrary(Str); 278 279 while (EatIfPresent(lltok::comma)) { 280 if (ParseStringConstant(Str)) return true; 281 M->addLibrary(Str); 282 } 283 284 return ParseToken(lltok::rsquare, "expected ']' at end of list"); 285} 286 287/// ParseUnnamedType: 288/// ::= 'type' type 289/// ::= LocalVarID '=' 'type' type 290bool LLParser::ParseUnnamedType() { 291 unsigned TypeID = NumberedTypes.size(); 292 293 // Handle the LocalVarID form. 294 if (Lex.getKind() == lltok::LocalVarID) { 295 if (Lex.getUIntVal() != TypeID) 296 return Error(Lex.getLoc(), "type expected to be numbered '%" + 297 utostr(TypeID) + "'"); 298 Lex.Lex(); // eat LocalVarID; 299 300 if (ParseToken(lltok::equal, "expected '=' after name")) 301 return true; 302 } 303 304 assert(Lex.getKind() == lltok::kw_type); 305 LocTy TypeLoc = Lex.getLoc(); 306 Lex.Lex(); // eat kw_type 307 308 PATypeHolder Ty(Type::getVoidTy(Context)); 309 if (ParseType(Ty)) return true; 310 311 // See if this type was previously referenced. 312 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 313 FI = ForwardRefTypeIDs.find(TypeID); 314 if (FI != ForwardRefTypeIDs.end()) { 315 if (FI->second.first.get() == Ty) 316 return Error(TypeLoc, "self referential type is invalid"); 317 318 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 319 Ty = FI->second.first.get(); 320 ForwardRefTypeIDs.erase(FI); 321 } 322 323 NumberedTypes.push_back(Ty); 324 325 return false; 326} 327 328/// toplevelentity 329/// ::= LocalVar '=' 'type' type 330bool LLParser::ParseNamedType() { 331 std::string Name = Lex.getStrVal(); 332 LocTy NameLoc = Lex.getLoc(); 333 Lex.Lex(); // eat LocalVar. 334 335 PATypeHolder Ty(Type::getVoidTy(Context)); 336 337 if (ParseToken(lltok::equal, "expected '=' after name") || 338 ParseToken(lltok::kw_type, "expected 'type' after name") || 339 ParseType(Ty)) 340 return true; 341 342 // Set the type name, checking for conflicts as we do so. 343 bool AlreadyExists = M->addTypeName(Name, Ty); 344 if (!AlreadyExists) return false; 345 346 // See if this type is a forward reference. We need to eagerly resolve 347 // types to allow recursive type redefinitions below. 348 std::map<std::string, std::pair<PATypeHolder, LocTy> >::iterator 349 FI = ForwardRefTypes.find(Name); 350 if (FI != ForwardRefTypes.end()) { 351 if (FI->second.first.get() == Ty) 352 return Error(NameLoc, "self referential type is invalid"); 353 354 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 355 Ty = FI->second.first.get(); 356 ForwardRefTypes.erase(FI); 357 } 358 359 // Inserting a name that is already defined, get the existing name. 360 const Type *Existing = M->getTypeByName(Name); 361 assert(Existing && "Conflict but no matching type?!"); 362 363 // Otherwise, this is an attempt to redefine a type. That's okay if 364 // the redefinition is identical to the original. 365 // FIXME: REMOVE REDEFINITIONS IN LLVM 3.0 366 if (Existing == Ty) return false; 367 368 // Any other kind of (non-equivalent) redefinition is an error. 369 return Error(NameLoc, "redefinition of type named '" + Name + "' of type '" + 370 Ty->getDescription() + "'"); 371} 372 373 374/// toplevelentity 375/// ::= 'declare' FunctionHeader 376bool LLParser::ParseDeclare() { 377 assert(Lex.getKind() == lltok::kw_declare); 378 Lex.Lex(); 379 380 Function *F; 381 return ParseFunctionHeader(F, false); 382} 383 384/// toplevelentity 385/// ::= 'define' FunctionHeader '{' ... 386bool LLParser::ParseDefine() { 387 assert(Lex.getKind() == lltok::kw_define); 388 Lex.Lex(); 389 390 Function *F; 391 return ParseFunctionHeader(F, true) || 392 ParseFunctionBody(*F); 393} 394 395/// ParseGlobalType 396/// ::= 'constant' 397/// ::= 'global' 398bool LLParser::ParseGlobalType(bool &IsConstant) { 399 if (Lex.getKind() == lltok::kw_constant) 400 IsConstant = true; 401 else if (Lex.getKind() == lltok::kw_global) 402 IsConstant = false; 403 else { 404 IsConstant = false; 405 return TokError("expected 'global' or 'constant'"); 406 } 407 Lex.Lex(); 408 return false; 409} 410 411/// ParseUnnamedGlobal: 412/// OptionalVisibility ALIAS ... 413/// OptionalLinkage OptionalVisibility ... -> global variable 414/// GlobalID '=' OptionalVisibility ALIAS ... 415/// GlobalID '=' OptionalLinkage OptionalVisibility ... -> global variable 416bool LLParser::ParseUnnamedGlobal() { 417 unsigned VarID = NumberedVals.size(); 418 std::string Name; 419 LocTy NameLoc = Lex.getLoc(); 420 421 // Handle the GlobalID form. 422 if (Lex.getKind() == lltok::GlobalID) { 423 if (Lex.getUIntVal() != VarID) 424 return Error(Lex.getLoc(), "variable expected to be numbered '%" + 425 utostr(VarID) + "'"); 426 Lex.Lex(); // eat GlobalID; 427 428 if (ParseToken(lltok::equal, "expected '=' after name")) 429 return true; 430 } 431 432 bool HasLinkage; 433 unsigned Linkage, Visibility; 434 if (ParseOptionalLinkage(Linkage, HasLinkage) || 435 ParseOptionalVisibility(Visibility)) 436 return true; 437 438 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 439 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 440 return ParseAlias(Name, NameLoc, Visibility); 441} 442 443/// ParseNamedGlobal: 444/// GlobalVar '=' OptionalVisibility ALIAS ... 445/// GlobalVar '=' OptionalLinkage OptionalVisibility ... -> global variable 446bool LLParser::ParseNamedGlobal() { 447 assert(Lex.getKind() == lltok::GlobalVar); 448 LocTy NameLoc = Lex.getLoc(); 449 std::string Name = Lex.getStrVal(); 450 Lex.Lex(); 451 452 bool HasLinkage; 453 unsigned Linkage, Visibility; 454 if (ParseToken(lltok::equal, "expected '=' in global variable") || 455 ParseOptionalLinkage(Linkage, HasLinkage) || 456 ParseOptionalVisibility(Visibility)) 457 return true; 458 459 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 460 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 461 return ParseAlias(Name, NameLoc, Visibility); 462} 463 464// MDString: 465// ::= '!' STRINGCONSTANT 466bool LLParser::ParseMDString(MDString *&Result) { 467 std::string Str; 468 if (ParseStringConstant(Str)) return true; 469 Result = MDString::get(Context, Str); 470 return false; 471} 472 473// MDNode: 474// ::= '!' MDNodeNumber 475bool LLParser::ParseMDNodeID(MDNode *&Result) { 476 // !{ ..., !42, ... } 477 unsigned MID = 0; 478 if (ParseUInt32(MID)) return true; 479 480 // Check existing MDNode. 481 if (MID < NumberedMetadata.size() && NumberedMetadata[MID] != 0) { 482 Result = NumberedMetadata[MID]; 483 return false; 484 } 485 486 // Create MDNode forward reference. 487 488 // FIXME: This is not unique enough! 489 std::string FwdRefName = "llvm.mdnode.fwdref." + utostr(MID); 490 Value *V = MDString::get(Context, FwdRefName); 491 MDNode *FwdNode = MDNode::get(Context, &V, 1); 492 ForwardRefMDNodes[MID] = std::make_pair(FwdNode, Lex.getLoc()); 493 494 if (NumberedMetadata.size() <= MID) 495 NumberedMetadata.resize(MID+1); 496 NumberedMetadata[MID] = FwdNode; 497 Result = FwdNode; 498 return false; 499} 500 501/// ParseNamedMetadata: 502/// !foo = !{ !1, !2 } 503bool LLParser::ParseNamedMetadata() { 504 assert(Lex.getKind() == lltok::MetadataVar); 505 std::string Name = Lex.getStrVal(); 506 Lex.Lex(); 507 508 if (ParseToken(lltok::equal, "expected '=' here") || 509 ParseToken(lltok::exclaim, "Expected '!' here") || 510 ParseToken(lltok::lbrace, "Expected '{' here")) 511 return true; 512 513 SmallVector<MDNode *, 8> Elts; 514 do { 515 // Null is a special case since it is typeless. 516 if (EatIfPresent(lltok::kw_null)) { 517 Elts.push_back(0); 518 continue; 519 } 520 521 if (ParseToken(lltok::exclaim, "Expected '!' here")) 522 return true; 523 524 MDNode *N = 0; 525 if (ParseMDNodeID(N)) return true; 526 Elts.push_back(N); 527 } while (EatIfPresent(lltok::comma)); 528 529 if (ParseToken(lltok::rbrace, "expected end of metadata node")) 530 return true; 531 532 NamedMDNode::Create(Context, Name, Elts.data(), Elts.size(), M); 533 return false; 534} 535 536/// ParseStandaloneMetadata: 537/// !42 = !{...} 538bool LLParser::ParseStandaloneMetadata() { 539 assert(Lex.getKind() == lltok::exclaim); 540 Lex.Lex(); 541 unsigned MetadataID = 0; 542 543 LocTy TyLoc; 544 PATypeHolder Ty(Type::getVoidTy(Context)); 545 SmallVector<Value *, 16> Elts; 546 if (ParseUInt32(MetadataID) || 547 ParseToken(lltok::equal, "expected '=' here") || 548 ParseType(Ty, TyLoc) || 549 ParseToken(lltok::exclaim, "Expected '!' here") || 550 ParseToken(lltok::lbrace, "Expected '{' here") || 551 ParseMDNodeVector(Elts, NULL, NULL) || 552 ParseToken(lltok::rbrace, "expected end of metadata node")) 553 return true; 554 555 MDNode *Init = MDNode::get(Context, Elts.data(), Elts.size()); 556 557 // See if this was forward referenced, if so, handle it. 558 std::map<unsigned, std::pair<TrackingVH<MDNode>, LocTy> >::iterator 559 FI = ForwardRefMDNodes.find(MetadataID); 560 if (FI != ForwardRefMDNodes.end()) { 561 FI->second.first->replaceAllUsesWith(Init); 562 ForwardRefMDNodes.erase(FI); 563 564 assert(NumberedMetadata[MetadataID] == Init && "Tracking VH didn't work"); 565 } else { 566 if (MetadataID >= NumberedMetadata.size()) 567 NumberedMetadata.resize(MetadataID+1); 568 569 if (NumberedMetadata[MetadataID] != 0) 570 return TokError("Metadata id is already used"); 571 NumberedMetadata[MetadataID] = Init; 572 } 573 574 return false; 575} 576 577/// ParseAlias: 578/// ::= GlobalVar '=' OptionalVisibility 'alias' OptionalLinkage Aliasee 579/// Aliasee 580/// ::= TypeAndValue 581/// ::= 'bitcast' '(' TypeAndValue 'to' Type ')' 582/// ::= 'getelementptr' 'inbounds'? '(' ... ')' 583/// 584/// Everything through visibility has already been parsed. 585/// 586bool LLParser::ParseAlias(const std::string &Name, LocTy NameLoc, 587 unsigned Visibility) { 588 assert(Lex.getKind() == lltok::kw_alias); 589 Lex.Lex(); 590 unsigned Linkage; 591 LocTy LinkageLoc = Lex.getLoc(); 592 if (ParseOptionalLinkage(Linkage)) 593 return true; 594 595 if (Linkage != GlobalValue::ExternalLinkage && 596 Linkage != GlobalValue::WeakAnyLinkage && 597 Linkage != GlobalValue::WeakODRLinkage && 598 Linkage != GlobalValue::InternalLinkage && 599 Linkage != GlobalValue::PrivateLinkage && 600 Linkage != GlobalValue::LinkerPrivateLinkage) 601 return Error(LinkageLoc, "invalid linkage type for alias"); 602 603 Constant *Aliasee; 604 LocTy AliaseeLoc = Lex.getLoc(); 605 if (Lex.getKind() != lltok::kw_bitcast && 606 Lex.getKind() != lltok::kw_getelementptr) { 607 if (ParseGlobalTypeAndValue(Aliasee)) return true; 608 } else { 609 // The bitcast dest type is not present, it is implied by the dest type. 610 ValID ID; 611 if (ParseValID(ID)) return true; 612 if (ID.Kind != ValID::t_Constant) 613 return Error(AliaseeLoc, "invalid aliasee"); 614 Aliasee = ID.ConstantVal; 615 } 616 617 if (!isa<PointerType>(Aliasee->getType())) 618 return Error(AliaseeLoc, "alias must have pointer type"); 619 620 // Okay, create the alias but do not insert it into the module yet. 621 GlobalAlias* GA = new GlobalAlias(Aliasee->getType(), 622 (GlobalValue::LinkageTypes)Linkage, Name, 623 Aliasee); 624 GA->setVisibility((GlobalValue::VisibilityTypes)Visibility); 625 626 // See if this value already exists in the symbol table. If so, it is either 627 // a redefinition or a definition of a forward reference. 628 if (GlobalValue *Val = M->getNamedValue(Name)) { 629 // See if this was a redefinition. If so, there is no entry in 630 // ForwardRefVals. 631 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 632 I = ForwardRefVals.find(Name); 633 if (I == ForwardRefVals.end()) 634 return Error(NameLoc, "redefinition of global named '@" + Name + "'"); 635 636 // Otherwise, this was a definition of forward ref. Verify that types 637 // agree. 638 if (Val->getType() != GA->getType()) 639 return Error(NameLoc, 640 "forward reference and definition of alias have different types"); 641 642 // If they agree, just RAUW the old value with the alias and remove the 643 // forward ref info. 644 Val->replaceAllUsesWith(GA); 645 Val->eraseFromParent(); 646 ForwardRefVals.erase(I); 647 } 648 649 // Insert into the module, we know its name won't collide now. 650 M->getAliasList().push_back(GA); 651 assert(GA->getNameStr() == Name && "Should not be a name conflict!"); 652 653 return false; 654} 655 656/// ParseGlobal 657/// ::= GlobalVar '=' OptionalLinkage OptionalVisibility OptionalThreadLocal 658/// OptionalAddrSpace GlobalType Type Const 659/// ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 660/// OptionalAddrSpace GlobalType Type Const 661/// 662/// Everything through visibility has been parsed already. 663/// 664bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc, 665 unsigned Linkage, bool HasLinkage, 666 unsigned Visibility) { 667 unsigned AddrSpace; 668 bool ThreadLocal, IsConstant; 669 LocTy TyLoc; 670 671 PATypeHolder Ty(Type::getVoidTy(Context)); 672 if (ParseOptionalToken(lltok::kw_thread_local, ThreadLocal) || 673 ParseOptionalAddrSpace(AddrSpace) || 674 ParseGlobalType(IsConstant) || 675 ParseType(Ty, TyLoc)) 676 return true; 677 678 // If the linkage is specified and is external, then no initializer is 679 // present. 680 Constant *Init = 0; 681 if (!HasLinkage || (Linkage != GlobalValue::DLLImportLinkage && 682 Linkage != GlobalValue::ExternalWeakLinkage && 683 Linkage != GlobalValue::ExternalLinkage)) { 684 if (ParseGlobalValue(Ty, Init)) 685 return true; 686 } 687 688 if (isa<FunctionType>(Ty) || Ty->isLabelTy()) 689 return Error(TyLoc, "invalid type for global variable"); 690 691 GlobalVariable *GV = 0; 692 693 // See if the global was forward referenced, if so, use the global. 694 if (!Name.empty()) { 695 if (GlobalValue *GVal = M->getNamedValue(Name)) { 696 if (!ForwardRefVals.erase(Name) || !isa<GlobalValue>(GVal)) 697 return Error(NameLoc, "redefinition of global '@" + Name + "'"); 698 GV = cast<GlobalVariable>(GVal); 699 } 700 } else { 701 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 702 I = ForwardRefValIDs.find(NumberedVals.size()); 703 if (I != ForwardRefValIDs.end()) { 704 GV = cast<GlobalVariable>(I->second.first); 705 ForwardRefValIDs.erase(I); 706 } 707 } 708 709 if (GV == 0) { 710 GV = new GlobalVariable(*M, Ty, false, GlobalValue::ExternalLinkage, 0, 711 Name, 0, false, AddrSpace); 712 } else { 713 if (GV->getType()->getElementType() != Ty) 714 return Error(TyLoc, 715 "forward reference and definition of global have different types"); 716 717 // Move the forward-reference to the correct spot in the module. 718 M->getGlobalList().splice(M->global_end(), M->getGlobalList(), GV); 719 } 720 721 if (Name.empty()) 722 NumberedVals.push_back(GV); 723 724 // Set the parsed properties on the global. 725 if (Init) 726 GV->setInitializer(Init); 727 GV->setConstant(IsConstant); 728 GV->setLinkage((GlobalValue::LinkageTypes)Linkage); 729 GV->setVisibility((GlobalValue::VisibilityTypes)Visibility); 730 GV->setThreadLocal(ThreadLocal); 731 732 // Parse attributes on the global. 733 while (Lex.getKind() == lltok::comma) { 734 Lex.Lex(); 735 736 if (Lex.getKind() == lltok::kw_section) { 737 Lex.Lex(); 738 GV->setSection(Lex.getStrVal()); 739 if (ParseToken(lltok::StringConstant, "expected global section string")) 740 return true; 741 } else if (Lex.getKind() == lltok::kw_align) { 742 unsigned Alignment; 743 if (ParseOptionalAlignment(Alignment)) return true; 744 GV->setAlignment(Alignment); 745 } else { 746 TokError("unknown global variable property!"); 747 } 748 } 749 750 return false; 751} 752 753 754//===----------------------------------------------------------------------===// 755// GlobalValue Reference/Resolution Routines. 756//===----------------------------------------------------------------------===// 757 758/// GetGlobalVal - Get a value with the specified name or ID, creating a 759/// forward reference record if needed. This can return null if the value 760/// exists but does not have the right type. 761GlobalValue *LLParser::GetGlobalVal(const std::string &Name, const Type *Ty, 762 LocTy Loc) { 763 const PointerType *PTy = dyn_cast<PointerType>(Ty); 764 if (PTy == 0) { 765 Error(Loc, "global variable reference must have pointer type"); 766 return 0; 767 } 768 769 // Look this name up in the normal function symbol table. 770 GlobalValue *Val = 771 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name)); 772 773 // If this is a forward reference for the value, see if we already created a 774 // forward ref record. 775 if (Val == 0) { 776 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 777 I = ForwardRefVals.find(Name); 778 if (I != ForwardRefVals.end()) 779 Val = I->second.first; 780 } 781 782 // If we have the value in the symbol table or fwd-ref table, return it. 783 if (Val) { 784 if (Val->getType() == Ty) return Val; 785 Error(Loc, "'@" + Name + "' defined with type '" + 786 Val->getType()->getDescription() + "'"); 787 return 0; 788 } 789 790 // Otherwise, create a new forward reference for this value and remember it. 791 GlobalValue *FwdVal; 792 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 793 // Function types can return opaque but functions can't. 794 if (isa<OpaqueType>(FT->getReturnType())) { 795 Error(Loc, "function may not return opaque type"); 796 return 0; 797 } 798 799 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M); 800 } else { 801 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 802 GlobalValue::ExternalWeakLinkage, 0, Name); 803 } 804 805 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 806 return FwdVal; 807} 808 809GlobalValue *LLParser::GetGlobalVal(unsigned ID, const Type *Ty, LocTy Loc) { 810 const PointerType *PTy = dyn_cast<PointerType>(Ty); 811 if (PTy == 0) { 812 Error(Loc, "global variable reference must have pointer type"); 813 return 0; 814 } 815 816 GlobalValue *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 817 818 // If this is a forward reference for the value, see if we already created a 819 // forward ref record. 820 if (Val == 0) { 821 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 822 I = ForwardRefValIDs.find(ID); 823 if (I != ForwardRefValIDs.end()) 824 Val = I->second.first; 825 } 826 827 // If we have the value in the symbol table or fwd-ref table, return it. 828 if (Val) { 829 if (Val->getType() == Ty) return Val; 830 Error(Loc, "'@" + utostr(ID) + "' defined with type '" + 831 Val->getType()->getDescription() + "'"); 832 return 0; 833 } 834 835 // Otherwise, create a new forward reference for this value and remember it. 836 GlobalValue *FwdVal; 837 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 838 // Function types can return opaque but functions can't. 839 if (isa<OpaqueType>(FT->getReturnType())) { 840 Error(Loc, "function may not return opaque type"); 841 return 0; 842 } 843 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, "", M); 844 } else { 845 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 846 GlobalValue::ExternalWeakLinkage, 0, ""); 847 } 848 849 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 850 return FwdVal; 851} 852 853 854//===----------------------------------------------------------------------===// 855// Helper Routines. 856//===----------------------------------------------------------------------===// 857 858/// ParseToken - If the current token has the specified kind, eat it and return 859/// success. Otherwise, emit the specified error and return failure. 860bool LLParser::ParseToken(lltok::Kind T, const char *ErrMsg) { 861 if (Lex.getKind() != T) 862 return TokError(ErrMsg); 863 Lex.Lex(); 864 return false; 865} 866 867/// ParseStringConstant 868/// ::= StringConstant 869bool LLParser::ParseStringConstant(std::string &Result) { 870 if (Lex.getKind() != lltok::StringConstant) 871 return TokError("expected string constant"); 872 Result = Lex.getStrVal(); 873 Lex.Lex(); 874 return false; 875} 876 877/// ParseUInt32 878/// ::= uint32 879bool LLParser::ParseUInt32(unsigned &Val) { 880 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned()) 881 return TokError("expected integer"); 882 uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(0xFFFFFFFFULL+1); 883 if (Val64 != unsigned(Val64)) 884 return TokError("expected 32-bit integer (too large)"); 885 Val = Val64; 886 Lex.Lex(); 887 return false; 888} 889 890 891/// ParseOptionalAddrSpace 892/// := /*empty*/ 893/// := 'addrspace' '(' uint32 ')' 894bool LLParser::ParseOptionalAddrSpace(unsigned &AddrSpace) { 895 AddrSpace = 0; 896 if (!EatIfPresent(lltok::kw_addrspace)) 897 return false; 898 return ParseToken(lltok::lparen, "expected '(' in address space") || 899 ParseUInt32(AddrSpace) || 900 ParseToken(lltok::rparen, "expected ')' in address space"); 901} 902 903/// ParseOptionalAttrs - Parse a potentially empty attribute list. AttrKind 904/// indicates what kind of attribute list this is: 0: function arg, 1: result, 905/// 2: function attr. 906/// 3: function arg after value: FIXME: REMOVE IN LLVM 3.0 907bool LLParser::ParseOptionalAttrs(unsigned &Attrs, unsigned AttrKind) { 908 Attrs = Attribute::None; 909 LocTy AttrLoc = Lex.getLoc(); 910 911 while (1) { 912 switch (Lex.getKind()) { 913 case lltok::kw_sext: 914 case lltok::kw_zext: 915 // Treat these as signext/zeroext if they occur in the argument list after 916 // the value, as in "call i8 @foo(i8 10 sext)". If they occur before the 917 // value, as in "call i8 @foo(i8 sext (" then it is part of a constant 918 // expr. 919 // FIXME: REMOVE THIS IN LLVM 3.0 920 if (AttrKind == 3) { 921 if (Lex.getKind() == lltok::kw_sext) 922 Attrs |= Attribute::SExt; 923 else 924 Attrs |= Attribute::ZExt; 925 break; 926 } 927 // FALL THROUGH. 928 default: // End of attributes. 929 if (AttrKind != 2 && (Attrs & Attribute::FunctionOnly)) 930 return Error(AttrLoc, "invalid use of function-only attribute"); 931 932 if (AttrKind != 0 && AttrKind != 3 && (Attrs & Attribute::ParameterOnly)) 933 return Error(AttrLoc, "invalid use of parameter-only attribute"); 934 935 return false; 936 case lltok::kw_zeroext: Attrs |= Attribute::ZExt; break; 937 case lltok::kw_signext: Attrs |= Attribute::SExt; break; 938 case lltok::kw_inreg: Attrs |= Attribute::InReg; break; 939 case lltok::kw_sret: Attrs |= Attribute::StructRet; break; 940 case lltok::kw_noalias: Attrs |= Attribute::NoAlias; break; 941 case lltok::kw_nocapture: Attrs |= Attribute::NoCapture; break; 942 case lltok::kw_byval: Attrs |= Attribute::ByVal; break; 943 case lltok::kw_nest: Attrs |= Attribute::Nest; break; 944 945 case lltok::kw_noreturn: Attrs |= Attribute::NoReturn; break; 946 case lltok::kw_nounwind: Attrs |= Attribute::NoUnwind; break; 947 case lltok::kw_noinline: Attrs |= Attribute::NoInline; break; 948 case lltok::kw_readnone: Attrs |= Attribute::ReadNone; break; 949 case lltok::kw_readonly: Attrs |= Attribute::ReadOnly; break; 950 case lltok::kw_inlinehint: Attrs |= Attribute::InlineHint; break; 951 case lltok::kw_alwaysinline: Attrs |= Attribute::AlwaysInline; break; 952 case lltok::kw_optsize: Attrs |= Attribute::OptimizeForSize; break; 953 case lltok::kw_ssp: Attrs |= Attribute::StackProtect; break; 954 case lltok::kw_sspreq: Attrs |= Attribute::StackProtectReq; break; 955 case lltok::kw_noredzone: Attrs |= Attribute::NoRedZone; break; 956 case lltok::kw_noimplicitfloat: Attrs |= Attribute::NoImplicitFloat; break; 957 case lltok::kw_naked: Attrs |= Attribute::Naked; break; 958 959 case lltok::kw_align: { 960 unsigned Alignment; 961 if (ParseOptionalAlignment(Alignment)) 962 return true; 963 Attrs |= Attribute::constructAlignmentFromInt(Alignment); 964 continue; 965 } 966 } 967 Lex.Lex(); 968 } 969} 970 971/// ParseOptionalLinkage 972/// ::= /*empty*/ 973/// ::= 'private' 974/// ::= 'linker_private' 975/// ::= 'internal' 976/// ::= 'weak' 977/// ::= 'weak_odr' 978/// ::= 'linkonce' 979/// ::= 'linkonce_odr' 980/// ::= 'appending' 981/// ::= 'dllexport' 982/// ::= 'common' 983/// ::= 'dllimport' 984/// ::= 'extern_weak' 985/// ::= 'external' 986bool LLParser::ParseOptionalLinkage(unsigned &Res, bool &HasLinkage) { 987 HasLinkage = false; 988 switch (Lex.getKind()) { 989 default: Res=GlobalValue::ExternalLinkage; return false; 990 case lltok::kw_private: Res = GlobalValue::PrivateLinkage; break; 991 case lltok::kw_linker_private: Res = GlobalValue::LinkerPrivateLinkage; break; 992 case lltok::kw_internal: Res = GlobalValue::InternalLinkage; break; 993 case lltok::kw_weak: Res = GlobalValue::WeakAnyLinkage; break; 994 case lltok::kw_weak_odr: Res = GlobalValue::WeakODRLinkage; break; 995 case lltok::kw_linkonce: Res = GlobalValue::LinkOnceAnyLinkage; break; 996 case lltok::kw_linkonce_odr: Res = GlobalValue::LinkOnceODRLinkage; break; 997 case lltok::kw_available_externally: 998 Res = GlobalValue::AvailableExternallyLinkage; 999 break; 1000 case lltok::kw_appending: Res = GlobalValue::AppendingLinkage; break; 1001 case lltok::kw_dllexport: Res = GlobalValue::DLLExportLinkage; break; 1002 case lltok::kw_common: Res = GlobalValue::CommonLinkage; break; 1003 case lltok::kw_dllimport: Res = GlobalValue::DLLImportLinkage; break; 1004 case lltok::kw_extern_weak: Res = GlobalValue::ExternalWeakLinkage; break; 1005 case lltok::kw_external: Res = GlobalValue::ExternalLinkage; break; 1006 } 1007 Lex.Lex(); 1008 HasLinkage = true; 1009 return false; 1010} 1011 1012/// ParseOptionalVisibility 1013/// ::= /*empty*/ 1014/// ::= 'default' 1015/// ::= 'hidden' 1016/// ::= 'protected' 1017/// 1018bool LLParser::ParseOptionalVisibility(unsigned &Res) { 1019 switch (Lex.getKind()) { 1020 default: Res = GlobalValue::DefaultVisibility; return false; 1021 case lltok::kw_default: Res = GlobalValue::DefaultVisibility; break; 1022 case lltok::kw_hidden: Res = GlobalValue::HiddenVisibility; break; 1023 case lltok::kw_protected: Res = GlobalValue::ProtectedVisibility; break; 1024 } 1025 Lex.Lex(); 1026 return false; 1027} 1028 1029/// ParseOptionalCallingConv 1030/// ::= /*empty*/ 1031/// ::= 'ccc' 1032/// ::= 'fastcc' 1033/// ::= 'coldcc' 1034/// ::= 'x86_stdcallcc' 1035/// ::= 'x86_fastcallcc' 1036/// ::= 'arm_apcscc' 1037/// ::= 'arm_aapcscc' 1038/// ::= 'arm_aapcs_vfpcc' 1039/// ::= 'msp430_intrcc' 1040/// ::= 'cc' UINT 1041/// 1042bool LLParser::ParseOptionalCallingConv(CallingConv::ID &CC) { 1043 switch (Lex.getKind()) { 1044 default: CC = CallingConv::C; return false; 1045 case lltok::kw_ccc: CC = CallingConv::C; break; 1046 case lltok::kw_fastcc: CC = CallingConv::Fast; break; 1047 case lltok::kw_coldcc: CC = CallingConv::Cold; break; 1048 case lltok::kw_x86_stdcallcc: CC = CallingConv::X86_StdCall; break; 1049 case lltok::kw_x86_fastcallcc: CC = CallingConv::X86_FastCall; break; 1050 case lltok::kw_arm_apcscc: CC = CallingConv::ARM_APCS; break; 1051 case lltok::kw_arm_aapcscc: CC = CallingConv::ARM_AAPCS; break; 1052 case lltok::kw_arm_aapcs_vfpcc:CC = CallingConv::ARM_AAPCS_VFP; break; 1053 case lltok::kw_msp430_intrcc: CC = CallingConv::MSP430_INTR; break; 1054 case lltok::kw_cc: { 1055 unsigned ArbitraryCC; 1056 Lex.Lex(); 1057 if (ParseUInt32(ArbitraryCC)) { 1058 return true; 1059 } else 1060 CC = static_cast<CallingConv::ID>(ArbitraryCC); 1061 return false; 1062 } 1063 break; 1064 } 1065 1066 Lex.Lex(); 1067 return false; 1068} 1069 1070/// ParseInstructionMetadata 1071/// ::= !dbg !42 (',' !dbg !57)* 1072bool LLParser:: 1073ParseInstructionMetadata(SmallVectorImpl<std::pair<unsigned, 1074 MDNode *> > &Result){ 1075 do { 1076 if (Lex.getKind() != lltok::MetadataVar) 1077 return TokError("expected metadata after comma"); 1078 1079 std::string Name = Lex.getStrVal(); 1080 Lex.Lex(); 1081 1082 MDNode *Node; 1083 if (ParseToken(lltok::exclaim, "expected '!' here") || 1084 ParseMDNodeID(Node)) 1085 return true; 1086 1087 unsigned MDK = M->getMDKindID(Name.c_str()); 1088 Result.push_back(std::make_pair(MDK, Node)); 1089 1090 // If this is the end of the list, we're done. 1091 } while (EatIfPresent(lltok::comma)); 1092 return false; 1093} 1094 1095/// ParseOptionalAlignment 1096/// ::= /* empty */ 1097/// ::= 'align' 4 1098bool LLParser::ParseOptionalAlignment(unsigned &Alignment) { 1099 Alignment = 0; 1100 if (!EatIfPresent(lltok::kw_align)) 1101 return false; 1102 LocTy AlignLoc = Lex.getLoc(); 1103 if (ParseUInt32(Alignment)) return true; 1104 if (!isPowerOf2_32(Alignment)) 1105 return Error(AlignLoc, "alignment is not a power of two"); 1106 return false; 1107} 1108 1109/// ParseOptionalCommaAlign 1110/// ::= 1111/// ::= ',' align 4 1112/// 1113/// This returns with AteExtraComma set to true if it ate an excess comma at the 1114/// end. 1115bool LLParser::ParseOptionalCommaAlign(unsigned &Alignment, 1116 bool &AteExtraComma) { 1117 AteExtraComma = false; 1118 while (EatIfPresent(lltok::comma)) { 1119 // Metadata at the end is an early exit. 1120 if (Lex.getKind() == lltok::MetadataVar) { 1121 AteExtraComma = true; 1122 return false; 1123 } 1124 1125 if (Lex.getKind() == lltok::kw_align) { 1126 if (ParseOptionalAlignment(Alignment)) return true; 1127 } else 1128 return true; 1129 } 1130 1131 return false; 1132} 1133 1134 1135/// ParseIndexList - This parses the index list for an insert/extractvalue 1136/// instruction. This sets AteExtraComma in the case where we eat an extra 1137/// comma at the end of the line and find that it is followed by metadata. 1138/// Clients that don't allow metadata can call the version of this function that 1139/// only takes one argument. 1140/// 1141/// ParseIndexList 1142/// ::= (',' uint32)+ 1143/// 1144bool LLParser::ParseIndexList(SmallVectorImpl<unsigned> &Indices, 1145 bool &AteExtraComma) { 1146 AteExtraComma = false; 1147 1148 if (Lex.getKind() != lltok::comma) 1149 return TokError("expected ',' as start of index list"); 1150 1151 while (EatIfPresent(lltok::comma)) { 1152 if (Lex.getKind() == lltok::MetadataVar) { 1153 AteExtraComma = true; 1154 return false; 1155 } 1156 unsigned Idx; 1157 if (ParseUInt32(Idx)) return true; 1158 Indices.push_back(Idx); 1159 } 1160 1161 return false; 1162} 1163 1164//===----------------------------------------------------------------------===// 1165// Type Parsing. 1166//===----------------------------------------------------------------------===// 1167 1168/// ParseType - Parse and resolve a full type. 1169bool LLParser::ParseType(PATypeHolder &Result, bool AllowVoid) { 1170 LocTy TypeLoc = Lex.getLoc(); 1171 if (ParseTypeRec(Result)) return true; 1172 1173 // Verify no unresolved uprefs. 1174 if (!UpRefs.empty()) 1175 return Error(UpRefs.back().Loc, "invalid unresolved type up reference"); 1176 1177 if (!AllowVoid && Result.get()->isVoidTy()) 1178 return Error(TypeLoc, "void type only allowed for function results"); 1179 1180 return false; 1181} 1182 1183/// HandleUpRefs - Every time we finish a new layer of types, this function is 1184/// called. It loops through the UpRefs vector, which is a list of the 1185/// currently active types. For each type, if the up-reference is contained in 1186/// the newly completed type, we decrement the level count. When the level 1187/// count reaches zero, the up-referenced type is the type that is passed in: 1188/// thus we can complete the cycle. 1189/// 1190PATypeHolder LLParser::HandleUpRefs(const Type *ty) { 1191 // If Ty isn't abstract, or if there are no up-references in it, then there is 1192 // nothing to resolve here. 1193 if (!ty->isAbstract() || UpRefs.empty()) return ty; 1194 1195 PATypeHolder Ty(ty); 1196#if 0 1197 dbgs() << "Type '" << Ty->getDescription() 1198 << "' newly formed. Resolving upreferences.\n" 1199 << UpRefs.size() << " upreferences active!\n"; 1200#endif 1201 1202 // If we find any resolvable upreferences (i.e., those whose NestingLevel goes 1203 // to zero), we resolve them all together before we resolve them to Ty. At 1204 // the end of the loop, if there is anything to resolve to Ty, it will be in 1205 // this variable. 1206 OpaqueType *TypeToResolve = 0; 1207 1208 for (unsigned i = 0; i != UpRefs.size(); ++i) { 1209 // Determine if 'Ty' directly contains this up-references 'LastContainedTy'. 1210 bool ContainsType = 1211 std::find(Ty->subtype_begin(), Ty->subtype_end(), 1212 UpRefs[i].LastContainedTy) != Ty->subtype_end(); 1213 1214#if 0 1215 dbgs() << " UR#" << i << " - TypeContains(" << Ty->getDescription() << ", " 1216 << UpRefs[i].LastContainedTy->getDescription() << ") = " 1217 << (ContainsType ? "true" : "false") 1218 << " level=" << UpRefs[i].NestingLevel << "\n"; 1219#endif 1220 if (!ContainsType) 1221 continue; 1222 1223 // Decrement level of upreference 1224 unsigned Level = --UpRefs[i].NestingLevel; 1225 UpRefs[i].LastContainedTy = Ty; 1226 1227 // If the Up-reference has a non-zero level, it shouldn't be resolved yet. 1228 if (Level != 0) 1229 continue; 1230 1231#if 0 1232 dbgs() << " * Resolving upreference for " << UpRefs[i].UpRefTy << "\n"; 1233#endif 1234 if (!TypeToResolve) 1235 TypeToResolve = UpRefs[i].UpRefTy; 1236 else 1237 UpRefs[i].UpRefTy->refineAbstractTypeTo(TypeToResolve); 1238 UpRefs.erase(UpRefs.begin()+i); // Remove from upreference list. 1239 --i; // Do not skip the next element. 1240 } 1241 1242 if (TypeToResolve) 1243 TypeToResolve->refineAbstractTypeTo(Ty); 1244 1245 return Ty; 1246} 1247 1248 1249/// ParseTypeRec - The recursive function used to process the internal 1250/// implementation details of types. 1251bool LLParser::ParseTypeRec(PATypeHolder &Result) { 1252 switch (Lex.getKind()) { 1253 default: 1254 return TokError("expected type"); 1255 case lltok::Type: 1256 // TypeRec ::= 'float' | 'void' (etc) 1257 Result = Lex.getTyVal(); 1258 Lex.Lex(); 1259 break; 1260 case lltok::kw_opaque: 1261 // TypeRec ::= 'opaque' 1262 Result = OpaqueType::get(Context); 1263 Lex.Lex(); 1264 break; 1265 case lltok::lbrace: 1266 // TypeRec ::= '{' ... '}' 1267 if (ParseStructType(Result, false)) 1268 return true; 1269 break; 1270 case lltok::lsquare: 1271 // TypeRec ::= '[' ... ']' 1272 Lex.Lex(); // eat the lsquare. 1273 if (ParseArrayVectorType(Result, false)) 1274 return true; 1275 break; 1276 case lltok::less: // Either vector or packed struct. 1277 // TypeRec ::= '<' ... '>' 1278 Lex.Lex(); 1279 if (Lex.getKind() == lltok::lbrace) { 1280 if (ParseStructType(Result, true) || 1281 ParseToken(lltok::greater, "expected '>' at end of packed struct")) 1282 return true; 1283 } else if (ParseArrayVectorType(Result, true)) 1284 return true; 1285 break; 1286 case lltok::LocalVar: 1287 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0 1288 // TypeRec ::= %foo 1289 if (const Type *T = M->getTypeByName(Lex.getStrVal())) { 1290 Result = T; 1291 } else { 1292 Result = OpaqueType::get(Context); 1293 ForwardRefTypes.insert(std::make_pair(Lex.getStrVal(), 1294 std::make_pair(Result, 1295 Lex.getLoc()))); 1296 M->addTypeName(Lex.getStrVal(), Result.get()); 1297 } 1298 Lex.Lex(); 1299 break; 1300 1301 case lltok::LocalVarID: 1302 // TypeRec ::= %4 1303 if (Lex.getUIntVal() < NumberedTypes.size()) 1304 Result = NumberedTypes[Lex.getUIntVal()]; 1305 else { 1306 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 1307 I = ForwardRefTypeIDs.find(Lex.getUIntVal()); 1308 if (I != ForwardRefTypeIDs.end()) 1309 Result = I->second.first; 1310 else { 1311 Result = OpaqueType::get(Context); 1312 ForwardRefTypeIDs.insert(std::make_pair(Lex.getUIntVal(), 1313 std::make_pair(Result, 1314 Lex.getLoc()))); 1315 } 1316 } 1317 Lex.Lex(); 1318 break; 1319 case lltok::backslash: { 1320 // TypeRec ::= '\' 4 1321 Lex.Lex(); 1322 unsigned Val; 1323 if (ParseUInt32(Val)) return true; 1324 OpaqueType *OT = OpaqueType::get(Context); //Use temporary placeholder. 1325 UpRefs.push_back(UpRefRecord(Lex.getLoc(), Val, OT)); 1326 Result = OT; 1327 break; 1328 } 1329 } 1330 1331 // Parse the type suffixes. 1332 while (1) { 1333 switch (Lex.getKind()) { 1334 // End of type. 1335 default: return false; 1336 1337 // TypeRec ::= TypeRec '*' 1338 case lltok::star: 1339 if (Result.get()->isLabelTy()) 1340 return TokError("basic block pointers are invalid"); 1341 if (Result.get()->isVoidTy()) 1342 return TokError("pointers to void are invalid; use i8* instead"); 1343 if (!PointerType::isValidElementType(Result.get())) 1344 return TokError("pointer to this type is invalid"); 1345 Result = HandleUpRefs(PointerType::getUnqual(Result.get())); 1346 Lex.Lex(); 1347 break; 1348 1349 // TypeRec ::= TypeRec 'addrspace' '(' uint32 ')' '*' 1350 case lltok::kw_addrspace: { 1351 if (Result.get()->isLabelTy()) 1352 return TokError("basic block pointers are invalid"); 1353 if (Result.get()->isVoidTy()) 1354 return TokError("pointers to void are invalid; use i8* instead"); 1355 if (!PointerType::isValidElementType(Result.get())) 1356 return TokError("pointer to this type is invalid"); 1357 unsigned AddrSpace; 1358 if (ParseOptionalAddrSpace(AddrSpace) || 1359 ParseToken(lltok::star, "expected '*' in address space")) 1360 return true; 1361 1362 Result = HandleUpRefs(PointerType::get(Result.get(), AddrSpace)); 1363 break; 1364 } 1365 1366 /// Types '(' ArgTypeListI ')' OptFuncAttrs 1367 case lltok::lparen: 1368 if (ParseFunctionType(Result)) 1369 return true; 1370 break; 1371 } 1372 } 1373} 1374 1375/// ParseParameterList 1376/// ::= '(' ')' 1377/// ::= '(' Arg (',' Arg)* ')' 1378/// Arg 1379/// ::= Type OptionalAttributes Value OptionalAttributes 1380bool LLParser::ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList, 1381 PerFunctionState &PFS) { 1382 if (ParseToken(lltok::lparen, "expected '(' in call")) 1383 return true; 1384 1385 while (Lex.getKind() != lltok::rparen) { 1386 // If this isn't the first argument, we need a comma. 1387 if (!ArgList.empty() && 1388 ParseToken(lltok::comma, "expected ',' in argument list")) 1389 return true; 1390 1391 // Parse the argument. 1392 LocTy ArgLoc; 1393 PATypeHolder ArgTy(Type::getVoidTy(Context)); 1394 unsigned ArgAttrs1 = Attribute::None; 1395 unsigned ArgAttrs2 = Attribute::None; 1396 Value *V; 1397 if (ParseType(ArgTy, ArgLoc)) 1398 return true; 1399 1400 // Otherwise, handle normal operands. 1401 if (ParseOptionalAttrs(ArgAttrs1, 0) || 1402 ParseValue(ArgTy, V, PFS) || 1403 // FIXME: Should not allow attributes after the argument, remove this 1404 // in LLVM 3.0. 1405 ParseOptionalAttrs(ArgAttrs2, 3)) 1406 return true; 1407 ArgList.push_back(ParamInfo(ArgLoc, V, ArgAttrs1|ArgAttrs2)); 1408 } 1409 1410 Lex.Lex(); // Lex the ')'. 1411 return false; 1412} 1413 1414 1415 1416/// ParseArgumentList - Parse the argument list for a function type or function 1417/// prototype. If 'inType' is true then we are parsing a FunctionType. 1418/// ::= '(' ArgTypeListI ')' 1419/// ArgTypeListI 1420/// ::= /*empty*/ 1421/// ::= '...' 1422/// ::= ArgTypeList ',' '...' 1423/// ::= ArgType (',' ArgType)* 1424/// 1425bool LLParser::ParseArgumentList(std::vector<ArgInfo> &ArgList, 1426 bool &isVarArg, bool inType) { 1427 isVarArg = false; 1428 assert(Lex.getKind() == lltok::lparen); 1429 Lex.Lex(); // eat the (. 1430 1431 if (Lex.getKind() == lltok::rparen) { 1432 // empty 1433 } else if (Lex.getKind() == lltok::dotdotdot) { 1434 isVarArg = true; 1435 Lex.Lex(); 1436 } else { 1437 LocTy TypeLoc = Lex.getLoc(); 1438 PATypeHolder ArgTy(Type::getVoidTy(Context)); 1439 unsigned Attrs; 1440 std::string Name; 1441 1442 // If we're parsing a type, use ParseTypeRec, because we allow recursive 1443 // types (such as a function returning a pointer to itself). If parsing a 1444 // function prototype, we require fully resolved types. 1445 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1446 ParseOptionalAttrs(Attrs, 0)) return true; 1447 1448 if (ArgTy->isVoidTy()) 1449 return Error(TypeLoc, "argument can not have void type"); 1450 1451 if (Lex.getKind() == lltok::LocalVar || 1452 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1453 Name = Lex.getStrVal(); 1454 Lex.Lex(); 1455 } 1456 1457 if (!FunctionType::isValidArgumentType(ArgTy)) 1458 return Error(TypeLoc, "invalid type for function argument"); 1459 1460 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1461 1462 while (EatIfPresent(lltok::comma)) { 1463 // Handle ... at end of arg list. 1464 if (EatIfPresent(lltok::dotdotdot)) { 1465 isVarArg = true; 1466 break; 1467 } 1468 1469 // Otherwise must be an argument type. 1470 TypeLoc = Lex.getLoc(); 1471 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1472 ParseOptionalAttrs(Attrs, 0)) return true; 1473 1474 if (ArgTy->isVoidTy()) 1475 return Error(TypeLoc, "argument can not have void type"); 1476 1477 if (Lex.getKind() == lltok::LocalVar || 1478 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1479 Name = Lex.getStrVal(); 1480 Lex.Lex(); 1481 } else { 1482 Name = ""; 1483 } 1484 1485 if (!ArgTy->isFirstClassType() && !isa<OpaqueType>(ArgTy)) 1486 return Error(TypeLoc, "invalid type for function argument"); 1487 1488 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1489 } 1490 } 1491 1492 return ParseToken(lltok::rparen, "expected ')' at end of argument list"); 1493} 1494 1495/// ParseFunctionType 1496/// ::= Type ArgumentList OptionalAttrs 1497bool LLParser::ParseFunctionType(PATypeHolder &Result) { 1498 assert(Lex.getKind() == lltok::lparen); 1499 1500 if (!FunctionType::isValidReturnType(Result)) 1501 return TokError("invalid function return type"); 1502 1503 std::vector<ArgInfo> ArgList; 1504 bool isVarArg; 1505 unsigned Attrs; 1506 if (ParseArgumentList(ArgList, isVarArg, true) || 1507 // FIXME: Allow, but ignore attributes on function types! 1508 // FIXME: Remove in LLVM 3.0 1509 ParseOptionalAttrs(Attrs, 2)) 1510 return true; 1511 1512 // Reject names on the arguments lists. 1513 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 1514 if (!ArgList[i].Name.empty()) 1515 return Error(ArgList[i].Loc, "argument name invalid in function type"); 1516 if (!ArgList[i].Attrs != 0) { 1517 // Allow but ignore attributes on function types; this permits 1518 // auto-upgrade. 1519 // FIXME: REJECT ATTRIBUTES ON FUNCTION TYPES in LLVM 3.0 1520 } 1521 } 1522 1523 std::vector<const Type*> ArgListTy; 1524 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 1525 ArgListTy.push_back(ArgList[i].Type); 1526 1527 Result = HandleUpRefs(FunctionType::get(Result.get(), 1528 ArgListTy, isVarArg)); 1529 return false; 1530} 1531 1532/// ParseStructType: Handles packed and unpacked types. </> parsed elsewhere. 1533/// TypeRec 1534/// ::= '{' '}' 1535/// ::= '{' TypeRec (',' TypeRec)* '}' 1536/// ::= '<' '{' '}' '>' 1537/// ::= '<' '{' TypeRec (',' TypeRec)* '}' '>' 1538bool LLParser::ParseStructType(PATypeHolder &Result, bool Packed) { 1539 assert(Lex.getKind() == lltok::lbrace); 1540 Lex.Lex(); // Consume the '{' 1541 1542 if (EatIfPresent(lltok::rbrace)) { 1543 Result = StructType::get(Context, Packed); 1544 return false; 1545 } 1546 1547 std::vector<PATypeHolder> ParamsList; 1548 LocTy EltTyLoc = Lex.getLoc(); 1549 if (ParseTypeRec(Result)) return true; 1550 ParamsList.push_back(Result); 1551 1552 if (Result->isVoidTy()) 1553 return Error(EltTyLoc, "struct element can not have void type"); 1554 if (!StructType::isValidElementType(Result)) 1555 return Error(EltTyLoc, "invalid element type for struct"); 1556 1557 while (EatIfPresent(lltok::comma)) { 1558 EltTyLoc = Lex.getLoc(); 1559 if (ParseTypeRec(Result)) return true; 1560 1561 if (Result->isVoidTy()) 1562 return Error(EltTyLoc, "struct element can not have void type"); 1563 if (!StructType::isValidElementType(Result)) 1564 return Error(EltTyLoc, "invalid element type for struct"); 1565 1566 ParamsList.push_back(Result); 1567 } 1568 1569 if (ParseToken(lltok::rbrace, "expected '}' at end of struct")) 1570 return true; 1571 1572 std::vector<const Type*> ParamsListTy; 1573 for (unsigned i = 0, e = ParamsList.size(); i != e; ++i) 1574 ParamsListTy.push_back(ParamsList[i].get()); 1575 Result = HandleUpRefs(StructType::get(Context, ParamsListTy, Packed)); 1576 return false; 1577} 1578 1579/// ParseArrayVectorType - Parse an array or vector type, assuming the first 1580/// token has already been consumed. 1581/// TypeRec 1582/// ::= '[' APSINTVAL 'x' Types ']' 1583/// ::= '<' APSINTVAL 'x' Types '>' 1584bool LLParser::ParseArrayVectorType(PATypeHolder &Result, bool isVector) { 1585 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned() || 1586 Lex.getAPSIntVal().getBitWidth() > 64) 1587 return TokError("expected number in address space"); 1588 1589 LocTy SizeLoc = Lex.getLoc(); 1590 uint64_t Size = Lex.getAPSIntVal().getZExtValue(); 1591 Lex.Lex(); 1592 1593 if (ParseToken(lltok::kw_x, "expected 'x' after element count")) 1594 return true; 1595 1596 LocTy TypeLoc = Lex.getLoc(); 1597 PATypeHolder EltTy(Type::getVoidTy(Context)); 1598 if (ParseTypeRec(EltTy)) return true; 1599 1600 if (EltTy->isVoidTy()) 1601 return Error(TypeLoc, "array and vector element type cannot be void"); 1602 1603 if (ParseToken(isVector ? lltok::greater : lltok::rsquare, 1604 "expected end of sequential type")) 1605 return true; 1606 1607 if (isVector) { 1608 if (Size == 0) 1609 return Error(SizeLoc, "zero element vector is illegal"); 1610 if ((unsigned)Size != Size) 1611 return Error(SizeLoc, "size too large for vector"); 1612 if (!VectorType::isValidElementType(EltTy)) 1613 return Error(TypeLoc, "vector element type must be fp or integer"); 1614 Result = VectorType::get(EltTy, unsigned(Size)); 1615 } else { 1616 if (!ArrayType::isValidElementType(EltTy)) 1617 return Error(TypeLoc, "invalid array element type"); 1618 Result = HandleUpRefs(ArrayType::get(EltTy, Size)); 1619 } 1620 return false; 1621} 1622 1623//===----------------------------------------------------------------------===// 1624// Function Semantic Analysis. 1625//===----------------------------------------------------------------------===// 1626 1627LLParser::PerFunctionState::PerFunctionState(LLParser &p, Function &f, 1628 int functionNumber) 1629 : P(p), F(f), FunctionNumber(functionNumber) { 1630 1631 // Insert unnamed arguments into the NumberedVals list. 1632 for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 1633 AI != E; ++AI) 1634 if (!AI->hasName()) 1635 NumberedVals.push_back(AI); 1636} 1637 1638LLParser::PerFunctionState::~PerFunctionState() { 1639 // If there were any forward referenced non-basicblock values, delete them. 1640 for (std::map<std::string, std::pair<Value*, LocTy> >::iterator 1641 I = ForwardRefVals.begin(), E = ForwardRefVals.end(); I != E; ++I) 1642 if (!isa<BasicBlock>(I->second.first)) { 1643 I->second.first->replaceAllUsesWith( 1644 UndefValue::get(I->second.first->getType())); 1645 delete I->second.first; 1646 I->second.first = 0; 1647 } 1648 1649 for (std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1650 I = ForwardRefValIDs.begin(), E = ForwardRefValIDs.end(); I != E; ++I) 1651 if (!isa<BasicBlock>(I->second.first)) { 1652 I->second.first->replaceAllUsesWith( 1653 UndefValue::get(I->second.first->getType())); 1654 delete I->second.first; 1655 I->second.first = 0; 1656 } 1657} 1658 1659bool LLParser::PerFunctionState::FinishFunction() { 1660 // Check to see if someone took the address of labels in this block. 1661 if (!P.ForwardRefBlockAddresses.empty()) { 1662 ValID FunctionID; 1663 if (!F.getName().empty()) { 1664 FunctionID.Kind = ValID::t_GlobalName; 1665 FunctionID.StrVal = F.getName(); 1666 } else { 1667 FunctionID.Kind = ValID::t_GlobalID; 1668 FunctionID.UIntVal = FunctionNumber; 1669 } 1670 1671 std::map<ValID, std::vector<std::pair<ValID, GlobalValue*> > >::iterator 1672 FRBAI = P.ForwardRefBlockAddresses.find(FunctionID); 1673 if (FRBAI != P.ForwardRefBlockAddresses.end()) { 1674 // Resolve all these references. 1675 if (P.ResolveForwardRefBlockAddresses(&F, FRBAI->second, this)) 1676 return true; 1677 1678 P.ForwardRefBlockAddresses.erase(FRBAI); 1679 } 1680 } 1681 1682 if (!ForwardRefVals.empty()) 1683 return P.Error(ForwardRefVals.begin()->second.second, 1684 "use of undefined value '%" + ForwardRefVals.begin()->first + 1685 "'"); 1686 if (!ForwardRefValIDs.empty()) 1687 return P.Error(ForwardRefValIDs.begin()->second.second, 1688 "use of undefined value '%" + 1689 utostr(ForwardRefValIDs.begin()->first) + "'"); 1690 return false; 1691} 1692 1693 1694/// GetVal - Get a value with the specified name or ID, creating a 1695/// forward reference record if needed. This can return null if the value 1696/// exists but does not have the right type. 1697Value *LLParser::PerFunctionState::GetVal(const std::string &Name, 1698 const Type *Ty, LocTy Loc) { 1699 // Look this name up in the normal function symbol table. 1700 Value *Val = F.getValueSymbolTable().lookup(Name); 1701 1702 // If this is a forward reference for the value, see if we already created a 1703 // forward ref record. 1704 if (Val == 0) { 1705 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1706 I = ForwardRefVals.find(Name); 1707 if (I != ForwardRefVals.end()) 1708 Val = I->second.first; 1709 } 1710 1711 // If we have the value in the symbol table or fwd-ref table, return it. 1712 if (Val) { 1713 if (Val->getType() == Ty) return Val; 1714 if (Ty->isLabelTy()) 1715 P.Error(Loc, "'%" + Name + "' is not a basic block"); 1716 else 1717 P.Error(Loc, "'%" + Name + "' defined with type '" + 1718 Val->getType()->getDescription() + "'"); 1719 return 0; 1720 } 1721 1722 // Don't make placeholders with invalid type. 1723 if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty) && !Ty->isLabelTy()) { 1724 P.Error(Loc, "invalid use of a non-first-class type"); 1725 return 0; 1726 } 1727 1728 // Otherwise, create a new forward reference for this value and remember it. 1729 Value *FwdVal; 1730 if (Ty->isLabelTy()) 1731 FwdVal = BasicBlock::Create(F.getContext(), Name, &F); 1732 else 1733 FwdVal = new Argument(Ty, Name); 1734 1735 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 1736 return FwdVal; 1737} 1738 1739Value *LLParser::PerFunctionState::GetVal(unsigned ID, const Type *Ty, 1740 LocTy Loc) { 1741 // Look this name up in the normal function symbol table. 1742 Value *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 1743 1744 // If this is a forward reference for the value, see if we already created a 1745 // forward ref record. 1746 if (Val == 0) { 1747 std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1748 I = ForwardRefValIDs.find(ID); 1749 if (I != ForwardRefValIDs.end()) 1750 Val = I->second.first; 1751 } 1752 1753 // If we have the value in the symbol table or fwd-ref table, return it. 1754 if (Val) { 1755 if (Val->getType() == Ty) return Val; 1756 if (Ty->isLabelTy()) 1757 P.Error(Loc, "'%" + utostr(ID) + "' is not a basic block"); 1758 else 1759 P.Error(Loc, "'%" + utostr(ID) + "' defined with type '" + 1760 Val->getType()->getDescription() + "'"); 1761 return 0; 1762 } 1763 1764 if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty) && !Ty->isLabelTy()) { 1765 P.Error(Loc, "invalid use of a non-first-class type"); 1766 return 0; 1767 } 1768 1769 // Otherwise, create a new forward reference for this value and remember it. 1770 Value *FwdVal; 1771 if (Ty->isLabelTy()) 1772 FwdVal = BasicBlock::Create(F.getContext(), "", &F); 1773 else 1774 FwdVal = new Argument(Ty); 1775 1776 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 1777 return FwdVal; 1778} 1779 1780/// SetInstName - After an instruction is parsed and inserted into its 1781/// basic block, this installs its name. 1782bool LLParser::PerFunctionState::SetInstName(int NameID, 1783 const std::string &NameStr, 1784 LocTy NameLoc, Instruction *Inst) { 1785 // If this instruction has void type, it cannot have a name or ID specified. 1786 if (Inst->getType()->isVoidTy()) { 1787 if (NameID != -1 || !NameStr.empty()) 1788 return P.Error(NameLoc, "instructions returning void cannot have a name"); 1789 return false; 1790 } 1791 1792 // If this was a numbered instruction, verify that the instruction is the 1793 // expected value and resolve any forward references. 1794 if (NameStr.empty()) { 1795 // If neither a name nor an ID was specified, just use the next ID. 1796 if (NameID == -1) 1797 NameID = NumberedVals.size(); 1798 1799 if (unsigned(NameID) != NumberedVals.size()) 1800 return P.Error(NameLoc, "instruction expected to be numbered '%" + 1801 utostr(NumberedVals.size()) + "'"); 1802 1803 std::map<unsigned, std::pair<Value*, LocTy> >::iterator FI = 1804 ForwardRefValIDs.find(NameID); 1805 if (FI != ForwardRefValIDs.end()) { 1806 if (FI->second.first->getType() != Inst->getType()) 1807 return P.Error(NameLoc, "instruction forward referenced with type '" + 1808 FI->second.first->getType()->getDescription() + "'"); 1809 FI->second.first->replaceAllUsesWith(Inst); 1810 delete FI->second.first; 1811 ForwardRefValIDs.erase(FI); 1812 } 1813 1814 NumberedVals.push_back(Inst); 1815 return false; 1816 } 1817 1818 // Otherwise, the instruction had a name. Resolve forward refs and set it. 1819 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1820 FI = ForwardRefVals.find(NameStr); 1821 if (FI != ForwardRefVals.end()) { 1822 if (FI->second.first->getType() != Inst->getType()) 1823 return P.Error(NameLoc, "instruction forward referenced with type '" + 1824 FI->second.first->getType()->getDescription() + "'"); 1825 FI->second.first->replaceAllUsesWith(Inst); 1826 delete FI->second.first; 1827 ForwardRefVals.erase(FI); 1828 } 1829 1830 // Set the name on the instruction. 1831 Inst->setName(NameStr); 1832 1833 if (Inst->getNameStr() != NameStr) 1834 return P.Error(NameLoc, "multiple definition of local value named '" + 1835 NameStr + "'"); 1836 return false; 1837} 1838 1839/// GetBB - Get a basic block with the specified name or ID, creating a 1840/// forward reference record if needed. 1841BasicBlock *LLParser::PerFunctionState::GetBB(const std::string &Name, 1842 LocTy Loc) { 1843 return cast_or_null<BasicBlock>(GetVal(Name, 1844 Type::getLabelTy(F.getContext()), Loc)); 1845} 1846 1847BasicBlock *LLParser::PerFunctionState::GetBB(unsigned ID, LocTy Loc) { 1848 return cast_or_null<BasicBlock>(GetVal(ID, 1849 Type::getLabelTy(F.getContext()), Loc)); 1850} 1851 1852/// DefineBB - Define the specified basic block, which is either named or 1853/// unnamed. If there is an error, this returns null otherwise it returns 1854/// the block being defined. 1855BasicBlock *LLParser::PerFunctionState::DefineBB(const std::string &Name, 1856 LocTy Loc) { 1857 BasicBlock *BB; 1858 if (Name.empty()) 1859 BB = GetBB(NumberedVals.size(), Loc); 1860 else 1861 BB = GetBB(Name, Loc); 1862 if (BB == 0) return 0; // Already diagnosed error. 1863 1864 // Move the block to the end of the function. Forward ref'd blocks are 1865 // inserted wherever they happen to be referenced. 1866 F.getBasicBlockList().splice(F.end(), F.getBasicBlockList(), BB); 1867 1868 // Remove the block from forward ref sets. 1869 if (Name.empty()) { 1870 ForwardRefValIDs.erase(NumberedVals.size()); 1871 NumberedVals.push_back(BB); 1872 } else { 1873 // BB forward references are already in the function symbol table. 1874 ForwardRefVals.erase(Name); 1875 } 1876 1877 return BB; 1878} 1879 1880//===----------------------------------------------------------------------===// 1881// Constants. 1882//===----------------------------------------------------------------------===// 1883 1884/// ParseValID - Parse an abstract value that doesn't necessarily have a 1885/// type implied. For example, if we parse "4" we don't know what integer type 1886/// it has. The value will later be combined with its type and checked for 1887/// sanity. 1888bool LLParser::ParseValID(ValID &ID, PerFunctionState *PFS) { 1889 ID.Loc = Lex.getLoc(); 1890 switch (Lex.getKind()) { 1891 default: return TokError("expected value token"); 1892 case lltok::GlobalID: // @42 1893 ID.UIntVal = Lex.getUIntVal(); 1894 ID.Kind = ValID::t_GlobalID; 1895 break; 1896 case lltok::GlobalVar: // @foo 1897 ID.StrVal = Lex.getStrVal(); 1898 ID.Kind = ValID::t_GlobalName; 1899 break; 1900 case lltok::LocalVarID: // %42 1901 ID.UIntVal = Lex.getUIntVal(); 1902 ID.Kind = ValID::t_LocalID; 1903 break; 1904 case lltok::LocalVar: // %foo 1905 case lltok::StringConstant: // "foo" - FIXME: REMOVE IN LLVM 3.0 1906 ID.StrVal = Lex.getStrVal(); 1907 ID.Kind = ValID::t_LocalName; 1908 break; 1909 case lltok::exclaim: // !{...} MDNode, !"foo" MDString 1910 Lex.Lex(); 1911 1912 if (EatIfPresent(lltok::lbrace)) { 1913 SmallVector<Value*, 16> Elts; 1914 bool isFunctionLocal = false; 1915 if (ParseMDNodeVector(Elts, PFS, &isFunctionLocal) || 1916 ParseToken(lltok::rbrace, "expected end of metadata node")) 1917 return true; 1918 1919 ID.MDNodeVal = MDNode::get(Context, Elts.data(), Elts.size(), 1920 isFunctionLocal); 1921 ID.Kind = ValID::t_MDNode; 1922 return false; 1923 } 1924 1925 // Standalone metadata reference 1926 // !{ ..., !42, ... } 1927 if (Lex.getKind() == lltok::APSInt) { 1928 if (ParseMDNodeID(ID.MDNodeVal)) return true; 1929 ID.Kind = ValID::t_MDNode; 1930 return false; 1931 } 1932 1933 // MDString: 1934 // ::= '!' STRINGCONSTANT 1935 if (ParseMDString(ID.MDStringVal)) return true; 1936 ID.Kind = ValID::t_MDString; 1937 return false; 1938 case lltok::APSInt: 1939 ID.APSIntVal = Lex.getAPSIntVal(); 1940 ID.Kind = ValID::t_APSInt; 1941 break; 1942 case lltok::APFloat: 1943 ID.APFloatVal = Lex.getAPFloatVal(); 1944 ID.Kind = ValID::t_APFloat; 1945 break; 1946 case lltok::kw_true: 1947 ID.ConstantVal = ConstantInt::getTrue(Context); 1948 ID.Kind = ValID::t_Constant; 1949 break; 1950 case lltok::kw_false: 1951 ID.ConstantVal = ConstantInt::getFalse(Context); 1952 ID.Kind = ValID::t_Constant; 1953 break; 1954 case lltok::kw_null: ID.Kind = ValID::t_Null; break; 1955 case lltok::kw_undef: ID.Kind = ValID::t_Undef; break; 1956 case lltok::kw_zeroinitializer: ID.Kind = ValID::t_Zero; break; 1957 1958 case lltok::lbrace: { 1959 // ValID ::= '{' ConstVector '}' 1960 Lex.Lex(); 1961 SmallVector<Constant*, 16> Elts; 1962 if (ParseGlobalValueVector(Elts) || 1963 ParseToken(lltok::rbrace, "expected end of struct constant")) 1964 return true; 1965 1966 ID.ConstantVal = ConstantStruct::get(Context, Elts.data(), 1967 Elts.size(), false); 1968 ID.Kind = ValID::t_Constant; 1969 return false; 1970 } 1971 case lltok::less: { 1972 // ValID ::= '<' ConstVector '>' --> Vector. 1973 // ValID ::= '<' '{' ConstVector '}' '>' --> Packed Struct. 1974 Lex.Lex(); 1975 bool isPackedStruct = EatIfPresent(lltok::lbrace); 1976 1977 SmallVector<Constant*, 16> Elts; 1978 LocTy FirstEltLoc = Lex.getLoc(); 1979 if (ParseGlobalValueVector(Elts) || 1980 (isPackedStruct && 1981 ParseToken(lltok::rbrace, "expected end of packed struct")) || 1982 ParseToken(lltok::greater, "expected end of constant")) 1983 return true; 1984 1985 if (isPackedStruct) { 1986 ID.ConstantVal = 1987 ConstantStruct::get(Context, Elts.data(), Elts.size(), true); 1988 ID.Kind = ValID::t_Constant; 1989 return false; 1990 } 1991 1992 if (Elts.empty()) 1993 return Error(ID.Loc, "constant vector must not be empty"); 1994 1995 if (!Elts[0]->getType()->isInteger() && 1996 !Elts[0]->getType()->isFloatingPoint()) 1997 return Error(FirstEltLoc, 1998 "vector elements must have integer or floating point type"); 1999 2000 // Verify that all the vector elements have the same type. 2001 for (unsigned i = 1, e = Elts.size(); i != e; ++i) 2002 if (Elts[i]->getType() != Elts[0]->getType()) 2003 return Error(FirstEltLoc, 2004 "vector element #" + utostr(i) + 2005 " is not of type '" + Elts[0]->getType()->getDescription()); 2006 2007 ID.ConstantVal = ConstantVector::get(Elts.data(), Elts.size()); 2008 ID.Kind = ValID::t_Constant; 2009 return false; 2010 } 2011 case lltok::lsquare: { // Array Constant 2012 Lex.Lex(); 2013 SmallVector<Constant*, 16> Elts; 2014 LocTy FirstEltLoc = Lex.getLoc(); 2015 if (ParseGlobalValueVector(Elts) || 2016 ParseToken(lltok::rsquare, "expected end of array constant")) 2017 return true; 2018 2019 // Handle empty element. 2020 if (Elts.empty()) { 2021 // Use undef instead of an array because it's inconvenient to determine 2022 // the element type at this point, there being no elements to examine. 2023 ID.Kind = ValID::t_EmptyArray; 2024 return false; 2025 } 2026 2027 if (!Elts[0]->getType()->isFirstClassType()) 2028 return Error(FirstEltLoc, "invalid array element type: " + 2029 Elts[0]->getType()->getDescription()); 2030 2031 ArrayType *ATy = ArrayType::get(Elts[0]->getType(), Elts.size()); 2032 2033 // Verify all elements are correct type! 2034 for (unsigned i = 0, e = Elts.size(); i != e; ++i) { 2035 if (Elts[i]->getType() != Elts[0]->getType()) 2036 return Error(FirstEltLoc, 2037 "array element #" + utostr(i) + 2038 " is not of type '" +Elts[0]->getType()->getDescription()); 2039 } 2040 2041 ID.ConstantVal = ConstantArray::get(ATy, Elts.data(), Elts.size()); 2042 ID.Kind = ValID::t_Constant; 2043 return false; 2044 } 2045 case lltok::kw_c: // c "foo" 2046 Lex.Lex(); 2047 ID.ConstantVal = ConstantArray::get(Context, Lex.getStrVal(), false); 2048 if (ParseToken(lltok::StringConstant, "expected string")) return true; 2049 ID.Kind = ValID::t_Constant; 2050 return false; 2051 2052 case lltok::kw_asm: { 2053 // ValID ::= 'asm' SideEffect? AlignStack? STRINGCONSTANT ',' STRINGCONSTANT 2054 bool HasSideEffect, AlignStack; 2055 Lex.Lex(); 2056 if (ParseOptionalToken(lltok::kw_sideeffect, HasSideEffect) || 2057 ParseOptionalToken(lltok::kw_alignstack, AlignStack) || 2058 ParseStringConstant(ID.StrVal) || 2059 ParseToken(lltok::comma, "expected comma in inline asm expression") || 2060 ParseToken(lltok::StringConstant, "expected constraint string")) 2061 return true; 2062 ID.StrVal2 = Lex.getStrVal(); 2063 ID.UIntVal = unsigned(HasSideEffect) | (unsigned(AlignStack)<<1); 2064 ID.Kind = ValID::t_InlineAsm; 2065 return false; 2066 } 2067 2068 case lltok::kw_blockaddress: { 2069 // ValID ::= 'blockaddress' '(' @foo ',' %bar ')' 2070 Lex.Lex(); 2071 2072 ValID Fn, Label; 2073 LocTy FnLoc, LabelLoc; 2074 2075 if (ParseToken(lltok::lparen, "expected '(' in block address expression") || 2076 ParseValID(Fn) || 2077 ParseToken(lltok::comma, "expected comma in block address expression")|| 2078 ParseValID(Label) || 2079 ParseToken(lltok::rparen, "expected ')' in block address expression")) 2080 return true; 2081 2082 if (Fn.Kind != ValID::t_GlobalID && Fn.Kind != ValID::t_GlobalName) 2083 return Error(Fn.Loc, "expected function name in blockaddress"); 2084 if (Label.Kind != ValID::t_LocalID && Label.Kind != ValID::t_LocalName) 2085 return Error(Label.Loc, "expected basic block name in blockaddress"); 2086 2087 // Make a global variable as a placeholder for this reference. 2088 GlobalVariable *FwdRef = new GlobalVariable(*M, Type::getInt8Ty(Context), 2089 false, GlobalValue::InternalLinkage, 2090 0, ""); 2091 ForwardRefBlockAddresses[Fn].push_back(std::make_pair(Label, FwdRef)); 2092 ID.ConstantVal = FwdRef; 2093 ID.Kind = ValID::t_Constant; 2094 return false; 2095 } 2096 2097 case lltok::kw_trunc: 2098 case lltok::kw_zext: 2099 case lltok::kw_sext: 2100 case lltok::kw_fptrunc: 2101 case lltok::kw_fpext: 2102 case lltok::kw_bitcast: 2103 case lltok::kw_uitofp: 2104 case lltok::kw_sitofp: 2105 case lltok::kw_fptoui: 2106 case lltok::kw_fptosi: 2107 case lltok::kw_inttoptr: 2108 case lltok::kw_ptrtoint: { 2109 unsigned Opc = Lex.getUIntVal(); 2110 PATypeHolder DestTy(Type::getVoidTy(Context)); 2111 Constant *SrcVal; 2112 Lex.Lex(); 2113 if (ParseToken(lltok::lparen, "expected '(' after constantexpr cast") || 2114 ParseGlobalTypeAndValue(SrcVal) || 2115 ParseToken(lltok::kw_to, "expected 'to' in constantexpr cast") || 2116 ParseType(DestTy) || 2117 ParseToken(lltok::rparen, "expected ')' at end of constantexpr cast")) 2118 return true; 2119 if (!CastInst::castIsValid((Instruction::CastOps)Opc, SrcVal, DestTy)) 2120 return Error(ID.Loc, "invalid cast opcode for cast from '" + 2121 SrcVal->getType()->getDescription() + "' to '" + 2122 DestTy->getDescription() + "'"); 2123 ID.ConstantVal = ConstantExpr::getCast((Instruction::CastOps)Opc, 2124 SrcVal, DestTy); 2125 ID.Kind = ValID::t_Constant; 2126 return false; 2127 } 2128 case lltok::kw_extractvalue: { 2129 Lex.Lex(); 2130 Constant *Val; 2131 SmallVector<unsigned, 4> Indices; 2132 if (ParseToken(lltok::lparen, "expected '(' in extractvalue constantexpr")|| 2133 ParseGlobalTypeAndValue(Val) || 2134 ParseIndexList(Indices) || 2135 ParseToken(lltok::rparen, "expected ')' in extractvalue constantexpr")) 2136 return true; 2137 2138 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 2139 return Error(ID.Loc, "extractvalue operand must be array or struct"); 2140 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 2141 Indices.end())) 2142 return Error(ID.Loc, "invalid indices for extractvalue"); 2143 ID.ConstantVal = 2144 ConstantExpr::getExtractValue(Val, Indices.data(), Indices.size()); 2145 ID.Kind = ValID::t_Constant; 2146 return false; 2147 } 2148 case lltok::kw_insertvalue: { 2149 Lex.Lex(); 2150 Constant *Val0, *Val1; 2151 SmallVector<unsigned, 4> Indices; 2152 if (ParseToken(lltok::lparen, "expected '(' in insertvalue constantexpr")|| 2153 ParseGlobalTypeAndValue(Val0) || 2154 ParseToken(lltok::comma, "expected comma in insertvalue constantexpr")|| 2155 ParseGlobalTypeAndValue(Val1) || 2156 ParseIndexList(Indices) || 2157 ParseToken(lltok::rparen, "expected ')' in insertvalue constantexpr")) 2158 return true; 2159 if (!isa<StructType>(Val0->getType()) && !isa<ArrayType>(Val0->getType())) 2160 return Error(ID.Loc, "extractvalue operand must be array or struct"); 2161 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 2162 Indices.end())) 2163 return Error(ID.Loc, "invalid indices for insertvalue"); 2164 ID.ConstantVal = ConstantExpr::getInsertValue(Val0, Val1, 2165 Indices.data(), Indices.size()); 2166 ID.Kind = ValID::t_Constant; 2167 return false; 2168 } 2169 case lltok::kw_icmp: 2170 case lltok::kw_fcmp: { 2171 unsigned PredVal, Opc = Lex.getUIntVal(); 2172 Constant *Val0, *Val1; 2173 Lex.Lex(); 2174 if (ParseCmpPredicate(PredVal, Opc) || 2175 ParseToken(lltok::lparen, "expected '(' in compare constantexpr") || 2176 ParseGlobalTypeAndValue(Val0) || 2177 ParseToken(lltok::comma, "expected comma in compare constantexpr") || 2178 ParseGlobalTypeAndValue(Val1) || 2179 ParseToken(lltok::rparen, "expected ')' in compare constantexpr")) 2180 return true; 2181 2182 if (Val0->getType() != Val1->getType()) 2183 return Error(ID.Loc, "compare operands must have the same type"); 2184 2185 CmpInst::Predicate Pred = (CmpInst::Predicate)PredVal; 2186 2187 if (Opc == Instruction::FCmp) { 2188 if (!Val0->getType()->isFPOrFPVector()) 2189 return Error(ID.Loc, "fcmp requires floating point operands"); 2190 ID.ConstantVal = ConstantExpr::getFCmp(Pred, Val0, Val1); 2191 } else { 2192 assert(Opc == Instruction::ICmp && "Unexpected opcode for CmpInst!"); 2193 if (!Val0->getType()->isIntOrIntVector() && 2194 !isa<PointerType>(Val0->getType())) 2195 return Error(ID.Loc, "icmp requires pointer or integer operands"); 2196 ID.ConstantVal = ConstantExpr::getICmp(Pred, Val0, Val1); 2197 } 2198 ID.Kind = ValID::t_Constant; 2199 return false; 2200 } 2201 2202 // Binary Operators. 2203 case lltok::kw_add: 2204 case lltok::kw_fadd: 2205 case lltok::kw_sub: 2206 case lltok::kw_fsub: 2207 case lltok::kw_mul: 2208 case lltok::kw_fmul: 2209 case lltok::kw_udiv: 2210 case lltok::kw_sdiv: 2211 case lltok::kw_fdiv: 2212 case lltok::kw_urem: 2213 case lltok::kw_srem: 2214 case lltok::kw_frem: { 2215 bool NUW = false; 2216 bool NSW = false; 2217 bool Exact = false; 2218 unsigned Opc = Lex.getUIntVal(); 2219 Constant *Val0, *Val1; 2220 Lex.Lex(); 2221 LocTy ModifierLoc = Lex.getLoc(); 2222 if (Opc == Instruction::Add || 2223 Opc == Instruction::Sub || 2224 Opc == Instruction::Mul) { 2225 if (EatIfPresent(lltok::kw_nuw)) 2226 NUW = true; 2227 if (EatIfPresent(lltok::kw_nsw)) { 2228 NSW = true; 2229 if (EatIfPresent(lltok::kw_nuw)) 2230 NUW = true; 2231 } 2232 } else if (Opc == Instruction::SDiv) { 2233 if (EatIfPresent(lltok::kw_exact)) 2234 Exact = true; 2235 } 2236 if (ParseToken(lltok::lparen, "expected '(' in binary constantexpr") || 2237 ParseGlobalTypeAndValue(Val0) || 2238 ParseToken(lltok::comma, "expected comma in binary constantexpr") || 2239 ParseGlobalTypeAndValue(Val1) || 2240 ParseToken(lltok::rparen, "expected ')' in binary constantexpr")) 2241 return true; 2242 if (Val0->getType() != Val1->getType()) 2243 return Error(ID.Loc, "operands of constexpr must have same type"); 2244 if (!Val0->getType()->isIntOrIntVector()) { 2245 if (NUW) 2246 return Error(ModifierLoc, "nuw only applies to integer operations"); 2247 if (NSW) 2248 return Error(ModifierLoc, "nsw only applies to integer operations"); 2249 } 2250 // API compatibility: Accept either integer or floating-point types with 2251 // add, sub, and mul. 2252 if (!Val0->getType()->isIntOrIntVector() && 2253 !Val0->getType()->isFPOrFPVector()) 2254 return Error(ID.Loc,"constexpr requires integer, fp, or vector operands"); 2255 unsigned Flags = 0; 2256 if (NUW) Flags |= OverflowingBinaryOperator::NoUnsignedWrap; 2257 if (NSW) Flags |= OverflowingBinaryOperator::NoSignedWrap; 2258 if (Exact) Flags |= SDivOperator::IsExact; 2259 Constant *C = ConstantExpr::get(Opc, Val0, Val1, Flags); 2260 ID.ConstantVal = C; 2261 ID.Kind = ValID::t_Constant; 2262 return false; 2263 } 2264 2265 // Logical Operations 2266 case lltok::kw_shl: 2267 case lltok::kw_lshr: 2268 case lltok::kw_ashr: 2269 case lltok::kw_and: 2270 case lltok::kw_or: 2271 case lltok::kw_xor: { 2272 unsigned Opc = Lex.getUIntVal(); 2273 Constant *Val0, *Val1; 2274 Lex.Lex(); 2275 if (ParseToken(lltok::lparen, "expected '(' in logical constantexpr") || 2276 ParseGlobalTypeAndValue(Val0) || 2277 ParseToken(lltok::comma, "expected comma in logical constantexpr") || 2278 ParseGlobalTypeAndValue(Val1) || 2279 ParseToken(lltok::rparen, "expected ')' in logical constantexpr")) 2280 return true; 2281 if (Val0->getType() != Val1->getType()) 2282 return Error(ID.Loc, "operands of constexpr must have same type"); 2283 if (!Val0->getType()->isIntOrIntVector()) 2284 return Error(ID.Loc, 2285 "constexpr requires integer or integer vector operands"); 2286 ID.ConstantVal = ConstantExpr::get(Opc, Val0, Val1); 2287 ID.Kind = ValID::t_Constant; 2288 return false; 2289 } 2290 2291 case lltok::kw_getelementptr: 2292 case lltok::kw_shufflevector: 2293 case lltok::kw_insertelement: 2294 case lltok::kw_extractelement: 2295 case lltok::kw_select: { 2296 unsigned Opc = Lex.getUIntVal(); 2297 SmallVector<Constant*, 16> Elts; 2298 bool InBounds = false; 2299 Lex.Lex(); 2300 if (Opc == Instruction::GetElementPtr) 2301 InBounds = EatIfPresent(lltok::kw_inbounds); 2302 if (ParseToken(lltok::lparen, "expected '(' in constantexpr") || 2303 ParseGlobalValueVector(Elts) || 2304 ParseToken(lltok::rparen, "expected ')' in constantexpr")) 2305 return true; 2306 2307 if (Opc == Instruction::GetElementPtr) { 2308 if (Elts.size() == 0 || !isa<PointerType>(Elts[0]->getType())) 2309 return Error(ID.Loc, "getelementptr requires pointer operand"); 2310 2311 if (!GetElementPtrInst::getIndexedType(Elts[0]->getType(), 2312 (Value**)(Elts.data() + 1), 2313 Elts.size() - 1)) 2314 return Error(ID.Loc, "invalid indices for getelementptr"); 2315 ID.ConstantVal = InBounds ? 2316 ConstantExpr::getInBoundsGetElementPtr(Elts[0], 2317 Elts.data() + 1, 2318 Elts.size() - 1) : 2319 ConstantExpr::getGetElementPtr(Elts[0], 2320 Elts.data() + 1, Elts.size() - 1); 2321 } else if (Opc == Instruction::Select) { 2322 if (Elts.size() != 3) 2323 return Error(ID.Loc, "expected three operands to select"); 2324 if (const char *Reason = SelectInst::areInvalidOperands(Elts[0], Elts[1], 2325 Elts[2])) 2326 return Error(ID.Loc, Reason); 2327 ID.ConstantVal = ConstantExpr::getSelect(Elts[0], Elts[1], Elts[2]); 2328 } else if (Opc == Instruction::ShuffleVector) { 2329 if (Elts.size() != 3) 2330 return Error(ID.Loc, "expected three operands to shufflevector"); 2331 if (!ShuffleVectorInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2332 return Error(ID.Loc, "invalid operands to shufflevector"); 2333 ID.ConstantVal = 2334 ConstantExpr::getShuffleVector(Elts[0], Elts[1],Elts[2]); 2335 } else if (Opc == Instruction::ExtractElement) { 2336 if (Elts.size() != 2) 2337 return Error(ID.Loc, "expected two operands to extractelement"); 2338 if (!ExtractElementInst::isValidOperands(Elts[0], Elts[1])) 2339 return Error(ID.Loc, "invalid extractelement operands"); 2340 ID.ConstantVal = ConstantExpr::getExtractElement(Elts[0], Elts[1]); 2341 } else { 2342 assert(Opc == Instruction::InsertElement && "Unknown opcode"); 2343 if (Elts.size() != 3) 2344 return Error(ID.Loc, "expected three operands to insertelement"); 2345 if (!InsertElementInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2346 return Error(ID.Loc, "invalid insertelement operands"); 2347 ID.ConstantVal = 2348 ConstantExpr::getInsertElement(Elts[0], Elts[1],Elts[2]); 2349 } 2350 2351 ID.Kind = ValID::t_Constant; 2352 return false; 2353 } 2354 } 2355 2356 Lex.Lex(); 2357 return false; 2358} 2359 2360/// ParseGlobalValue - Parse a global value with the specified type. 2361bool LLParser::ParseGlobalValue(const Type *Ty, Constant *&V) { 2362 V = 0; 2363 ValID ID; 2364 return ParseValID(ID) || 2365 ConvertGlobalValIDToValue(Ty, ID, V); 2366} 2367 2368/// ConvertGlobalValIDToValue - Apply a type to a ValID to get a fully resolved 2369/// constant. 2370bool LLParser::ConvertGlobalValIDToValue(const Type *Ty, ValID &ID, 2371 Constant *&V) { 2372 if (isa<FunctionType>(Ty)) 2373 return Error(ID.Loc, "functions are not values, refer to them as pointers"); 2374 2375 switch (ID.Kind) { 2376 default: llvm_unreachable("Unknown ValID!"); 2377 case ValID::t_MDNode: 2378 case ValID::t_MDString: 2379 return Error(ID.Loc, "invalid use of metadata"); 2380 case ValID::t_LocalID: 2381 case ValID::t_LocalName: 2382 return Error(ID.Loc, "invalid use of function-local name"); 2383 case ValID::t_InlineAsm: 2384 return Error(ID.Loc, "inline asm can only be an operand of call/invoke"); 2385 case ValID::t_GlobalName: 2386 V = GetGlobalVal(ID.StrVal, Ty, ID.Loc); 2387 return V == 0; 2388 case ValID::t_GlobalID: 2389 V = GetGlobalVal(ID.UIntVal, Ty, ID.Loc); 2390 return V == 0; 2391 case ValID::t_APSInt: 2392 if (!isa<IntegerType>(Ty)) 2393 return Error(ID.Loc, "integer constant must have integer type"); 2394 ID.APSIntVal.extOrTrunc(Ty->getPrimitiveSizeInBits()); 2395 V = ConstantInt::get(Context, ID.APSIntVal); 2396 return false; 2397 case ValID::t_APFloat: 2398 if (!Ty->isFloatingPoint() || 2399 !ConstantFP::isValueValidForType(Ty, ID.APFloatVal)) 2400 return Error(ID.Loc, "floating point constant invalid for type"); 2401 2402 // The lexer has no type info, so builds all float and double FP constants 2403 // as double. Fix this here. Long double does not need this. 2404 if (&ID.APFloatVal.getSemantics() == &APFloat::IEEEdouble && 2405 Ty->isFloatTy()) { 2406 bool Ignored; 2407 ID.APFloatVal.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, 2408 &Ignored); 2409 } 2410 V = ConstantFP::get(Context, ID.APFloatVal); 2411 2412 if (V->getType() != Ty) 2413 return Error(ID.Loc, "floating point constant does not have type '" + 2414 Ty->getDescription() + "'"); 2415 2416 return false; 2417 case ValID::t_Null: 2418 if (!isa<PointerType>(Ty)) 2419 return Error(ID.Loc, "null must be a pointer type"); 2420 V = ConstantPointerNull::get(cast<PointerType>(Ty)); 2421 return false; 2422 case ValID::t_Undef: 2423 // FIXME: LabelTy should not be a first-class type. 2424 if ((!Ty->isFirstClassType() || Ty->isLabelTy()) && 2425 !isa<OpaqueType>(Ty)) 2426 return Error(ID.Loc, "invalid type for undef constant"); 2427 V = UndefValue::get(Ty); 2428 return false; 2429 case ValID::t_EmptyArray: 2430 if (!isa<ArrayType>(Ty) || cast<ArrayType>(Ty)->getNumElements() != 0) 2431 return Error(ID.Loc, "invalid empty array initializer"); 2432 V = UndefValue::get(Ty); 2433 return false; 2434 case ValID::t_Zero: 2435 // FIXME: LabelTy should not be a first-class type. 2436 if (!Ty->isFirstClassType() || Ty->isLabelTy()) 2437 return Error(ID.Loc, "invalid type for null constant"); 2438 V = Constant::getNullValue(Ty); 2439 return false; 2440 case ValID::t_Constant: 2441 if (ID.ConstantVal->getType() != Ty) 2442 return Error(ID.Loc, "constant expression type mismatch"); 2443 V = ID.ConstantVal; 2444 return false; 2445 } 2446} 2447 2448/// ConvertGlobalOrMetadataValIDToValue - Apply a type to a ValID to get a fully 2449/// resolved constant, metadata, or function-local value 2450bool LLParser::ConvertGlobalOrMetadataValIDToValue(const Type *Ty, ValID &ID, 2451 Value *&V, 2452 PerFunctionState *PFS, 2453 bool *isFunctionLocal) { 2454 switch (ID.Kind) { 2455 case ValID::t_MDNode: 2456 if (!Ty->isMetadataTy()) 2457 return Error(ID.Loc, "metadata value must have metadata type"); 2458 V = ID.MDNodeVal; 2459 return false; 2460 case ValID::t_MDString: 2461 if (!Ty->isMetadataTy()) 2462 return Error(ID.Loc, "metadata value must have metadata type"); 2463 V = ID.MDStringVal; 2464 return false; 2465 case ValID::t_LocalID: 2466 case ValID::t_LocalName: 2467 if (!PFS || !isFunctionLocal) 2468 return Error(ID.Loc, "invalid use of function-local name"); 2469 if (ConvertValIDToValue(Ty, ID, V, *PFS)) return true; 2470 *isFunctionLocal = true; 2471 return false; 2472 default: 2473 Constant *C; 2474 if (ConvertGlobalValIDToValue(Ty, ID, C)) return true; 2475 V = C; 2476 return false; 2477 } 2478} 2479 2480 2481bool LLParser::ParseGlobalTypeAndValue(Constant *&V) { 2482 PATypeHolder Type(Type::getVoidTy(Context)); 2483 return ParseType(Type) || 2484 ParseGlobalValue(Type, V); 2485} 2486 2487/// ParseGlobalValueVector 2488/// ::= /*empty*/ 2489/// ::= TypeAndValue (',' TypeAndValue)* 2490bool LLParser::ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts) { 2491 // Empty list. 2492 if (Lex.getKind() == lltok::rbrace || 2493 Lex.getKind() == lltok::rsquare || 2494 Lex.getKind() == lltok::greater || 2495 Lex.getKind() == lltok::rparen) 2496 return false; 2497 2498 Constant *C; 2499 if (ParseGlobalTypeAndValue(C)) return true; 2500 Elts.push_back(C); 2501 2502 while (EatIfPresent(lltok::comma)) { 2503 if (ParseGlobalTypeAndValue(C)) return true; 2504 Elts.push_back(C); 2505 } 2506 2507 return false; 2508} 2509 2510 2511//===----------------------------------------------------------------------===// 2512// Function Parsing. 2513//===----------------------------------------------------------------------===// 2514 2515bool LLParser::ConvertValIDToValue(const Type *Ty, ValID &ID, Value *&V, 2516 PerFunctionState &PFS) { 2517 switch (ID.Kind) { 2518 case ValID::t_LocalID: V = PFS.GetVal(ID.UIntVal, Ty, ID.Loc); break; 2519 case ValID::t_LocalName: V = PFS.GetVal(ID.StrVal, Ty, ID.Loc); break; 2520 case ValID::t_InlineAsm: { 2521 const PointerType *PTy = dyn_cast<PointerType>(Ty); 2522 const FunctionType *FTy = 2523 PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : 0; 2524 if (!FTy || !InlineAsm::Verify(FTy, ID.StrVal2)) 2525 return Error(ID.Loc, "invalid type for inline asm constraint string"); 2526 V = InlineAsm::get(FTy, ID.StrVal, ID.StrVal2, ID.UIntVal&1, ID.UIntVal>>1); 2527 return false; 2528 } 2529 default: 2530 return ConvertGlobalOrMetadataValIDToValue(Ty, ID, V, &PFS, NULL); 2531 } 2532 2533 return V == 0; 2534} 2535 2536bool LLParser::ParseValue(const Type *Ty, Value *&V, PerFunctionState &PFS) { 2537 V = 0; 2538 ValID ID; 2539 return ParseValID(ID, &PFS) || 2540 ConvertValIDToValue(Ty, ID, V, PFS); 2541} 2542 2543bool LLParser::ParseTypeAndValue(Value *&V, PerFunctionState &PFS) { 2544 PATypeHolder T(Type::getVoidTy(Context)); 2545 return ParseType(T) || 2546 ParseValue(T, V, PFS); 2547} 2548 2549bool LLParser::ParseTypeAndBasicBlock(BasicBlock *&BB, LocTy &Loc, 2550 PerFunctionState &PFS) { 2551 Value *V; 2552 Loc = Lex.getLoc(); 2553 if (ParseTypeAndValue(V, PFS)) return true; 2554 if (!isa<BasicBlock>(V)) 2555 return Error(Loc, "expected a basic block"); 2556 BB = cast<BasicBlock>(V); 2557 return false; 2558} 2559 2560 2561/// FunctionHeader 2562/// ::= OptionalLinkage OptionalVisibility OptionalCallingConv OptRetAttrs 2563/// Type GlobalName '(' ArgList ')' OptFuncAttrs OptSection 2564/// OptionalAlign OptGC 2565bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) { 2566 // Parse the linkage. 2567 LocTy LinkageLoc = Lex.getLoc(); 2568 unsigned Linkage; 2569 2570 unsigned Visibility, RetAttrs; 2571 CallingConv::ID CC; 2572 PATypeHolder RetType(Type::getVoidTy(Context)); 2573 LocTy RetTypeLoc = Lex.getLoc(); 2574 if (ParseOptionalLinkage(Linkage) || 2575 ParseOptionalVisibility(Visibility) || 2576 ParseOptionalCallingConv(CC) || 2577 ParseOptionalAttrs(RetAttrs, 1) || 2578 ParseType(RetType, RetTypeLoc, true /*void allowed*/)) 2579 return true; 2580 2581 // Verify that the linkage is ok. 2582 switch ((GlobalValue::LinkageTypes)Linkage) { 2583 case GlobalValue::ExternalLinkage: 2584 break; // always ok. 2585 case GlobalValue::DLLImportLinkage: 2586 case GlobalValue::ExternalWeakLinkage: 2587 if (isDefine) 2588 return Error(LinkageLoc, "invalid linkage for function definition"); 2589 break; 2590 case GlobalValue::PrivateLinkage: 2591 case GlobalValue::LinkerPrivateLinkage: 2592 case GlobalValue::InternalLinkage: 2593 case GlobalValue::AvailableExternallyLinkage: 2594 case GlobalValue::LinkOnceAnyLinkage: 2595 case GlobalValue::LinkOnceODRLinkage: 2596 case GlobalValue::WeakAnyLinkage: 2597 case GlobalValue::WeakODRLinkage: 2598 case GlobalValue::DLLExportLinkage: 2599 if (!isDefine) 2600 return Error(LinkageLoc, "invalid linkage for function declaration"); 2601 break; 2602 case GlobalValue::AppendingLinkage: 2603 case GlobalValue::GhostLinkage: 2604 case GlobalValue::CommonLinkage: 2605 return Error(LinkageLoc, "invalid function linkage type"); 2606 } 2607 2608 if (!FunctionType::isValidReturnType(RetType) || 2609 isa<OpaqueType>(RetType)) 2610 return Error(RetTypeLoc, "invalid function return type"); 2611 2612 LocTy NameLoc = Lex.getLoc(); 2613 2614 std::string FunctionName; 2615 if (Lex.getKind() == lltok::GlobalVar) { 2616 FunctionName = Lex.getStrVal(); 2617 } else if (Lex.getKind() == lltok::GlobalID) { // @42 is ok. 2618 unsigned NameID = Lex.getUIntVal(); 2619 2620 if (NameID != NumberedVals.size()) 2621 return TokError("function expected to be numbered '%" + 2622 utostr(NumberedVals.size()) + "'"); 2623 } else { 2624 return TokError("expected function name"); 2625 } 2626 2627 Lex.Lex(); 2628 2629 if (Lex.getKind() != lltok::lparen) 2630 return TokError("expected '(' in function argument list"); 2631 2632 std::vector<ArgInfo> ArgList; 2633 bool isVarArg; 2634 unsigned FuncAttrs; 2635 std::string Section; 2636 unsigned Alignment; 2637 std::string GC; 2638 2639 if (ParseArgumentList(ArgList, isVarArg, false) || 2640 ParseOptionalAttrs(FuncAttrs, 2) || 2641 (EatIfPresent(lltok::kw_section) && 2642 ParseStringConstant(Section)) || 2643 ParseOptionalAlignment(Alignment) || 2644 (EatIfPresent(lltok::kw_gc) && 2645 ParseStringConstant(GC))) 2646 return true; 2647 2648 // If the alignment was parsed as an attribute, move to the alignment field. 2649 if (FuncAttrs & Attribute::Alignment) { 2650 Alignment = Attribute::getAlignmentFromAttrs(FuncAttrs); 2651 FuncAttrs &= ~Attribute::Alignment; 2652 } 2653 2654 // Okay, if we got here, the function is syntactically valid. Convert types 2655 // and do semantic checks. 2656 std::vector<const Type*> ParamTypeList; 2657 SmallVector<AttributeWithIndex, 8> Attrs; 2658 // FIXME : In 3.0, stop accepting zext, sext and inreg as optional function 2659 // attributes. 2660 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 2661 if (FuncAttrs & ObsoleteFuncAttrs) { 2662 RetAttrs |= FuncAttrs & ObsoleteFuncAttrs; 2663 FuncAttrs &= ~ObsoleteFuncAttrs; 2664 } 2665 2666 if (RetAttrs != Attribute::None) 2667 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 2668 2669 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 2670 ParamTypeList.push_back(ArgList[i].Type); 2671 if (ArgList[i].Attrs != Attribute::None) 2672 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 2673 } 2674 2675 if (FuncAttrs != Attribute::None) 2676 Attrs.push_back(AttributeWithIndex::get(~0, FuncAttrs)); 2677 2678 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 2679 2680 if (PAL.paramHasAttr(1, Attribute::StructRet) && !RetType->isVoidTy()) 2681 return Error(RetTypeLoc, "functions with 'sret' argument must return void"); 2682 2683 const FunctionType *FT = 2684 FunctionType::get(RetType, ParamTypeList, isVarArg); 2685 const PointerType *PFT = PointerType::getUnqual(FT); 2686 2687 Fn = 0; 2688 if (!FunctionName.empty()) { 2689 // If this was a definition of a forward reference, remove the definition 2690 // from the forward reference table and fill in the forward ref. 2691 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator FRVI = 2692 ForwardRefVals.find(FunctionName); 2693 if (FRVI != ForwardRefVals.end()) { 2694 Fn = M->getFunction(FunctionName); 2695 ForwardRefVals.erase(FRVI); 2696 } else if ((Fn = M->getFunction(FunctionName))) { 2697 // If this function already exists in the symbol table, then it is 2698 // multiply defined. We accept a few cases for old backwards compat. 2699 // FIXME: Remove this stuff for LLVM 3.0. 2700 if (Fn->getType() != PFT || Fn->getAttributes() != PAL || 2701 (!Fn->isDeclaration() && isDefine)) { 2702 // If the redefinition has different type or different attributes, 2703 // reject it. If both have bodies, reject it. 2704 return Error(NameLoc, "invalid redefinition of function '" + 2705 FunctionName + "'"); 2706 } else if (Fn->isDeclaration()) { 2707 // Make sure to strip off any argument names so we can't get conflicts. 2708 for (Function::arg_iterator AI = Fn->arg_begin(), AE = Fn->arg_end(); 2709 AI != AE; ++AI) 2710 AI->setName(""); 2711 } 2712 } else if (M->getNamedValue(FunctionName)) { 2713 return Error(NameLoc, "redefinition of function '@" + FunctionName + "'"); 2714 } 2715 2716 } else { 2717 // If this is a definition of a forward referenced function, make sure the 2718 // types agree. 2719 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator I 2720 = ForwardRefValIDs.find(NumberedVals.size()); 2721 if (I != ForwardRefValIDs.end()) { 2722 Fn = cast<Function>(I->second.first); 2723 if (Fn->getType() != PFT) 2724 return Error(NameLoc, "type of definition and forward reference of '@" + 2725 utostr(NumberedVals.size()) +"' disagree"); 2726 ForwardRefValIDs.erase(I); 2727 } 2728 } 2729 2730 if (Fn == 0) 2731 Fn = Function::Create(FT, GlobalValue::ExternalLinkage, FunctionName, M); 2732 else // Move the forward-reference to the correct spot in the module. 2733 M->getFunctionList().splice(M->end(), M->getFunctionList(), Fn); 2734 2735 if (FunctionName.empty()) 2736 NumberedVals.push_back(Fn); 2737 2738 Fn->setLinkage((GlobalValue::LinkageTypes)Linkage); 2739 Fn->setVisibility((GlobalValue::VisibilityTypes)Visibility); 2740 Fn->setCallingConv(CC); 2741 Fn->setAttributes(PAL); 2742 Fn->setAlignment(Alignment); 2743 Fn->setSection(Section); 2744 if (!GC.empty()) Fn->setGC(GC.c_str()); 2745 2746 // Add all of the arguments we parsed to the function. 2747 Function::arg_iterator ArgIt = Fn->arg_begin(); 2748 for (unsigned i = 0, e = ArgList.size(); i != e; ++i, ++ArgIt) { 2749 // If we run out of arguments in the Function prototype, exit early. 2750 // FIXME: REMOVE THIS IN LLVM 3.0, this is just for the mismatch case above. 2751 if (ArgIt == Fn->arg_end()) break; 2752 2753 // If the argument has a name, insert it into the argument symbol table. 2754 if (ArgList[i].Name.empty()) continue; 2755 2756 // Set the name, if it conflicted, it will be auto-renamed. 2757 ArgIt->setName(ArgList[i].Name); 2758 2759 if (ArgIt->getNameStr() != ArgList[i].Name) 2760 return Error(ArgList[i].Loc, "redefinition of argument '%" + 2761 ArgList[i].Name + "'"); 2762 } 2763 2764 return false; 2765} 2766 2767 2768/// ParseFunctionBody 2769/// ::= '{' BasicBlock+ '}' 2770/// ::= 'begin' BasicBlock+ 'end' // FIXME: remove in LLVM 3.0 2771/// 2772bool LLParser::ParseFunctionBody(Function &Fn) { 2773 if (Lex.getKind() != lltok::lbrace && Lex.getKind() != lltok::kw_begin) 2774 return TokError("expected '{' in function body"); 2775 Lex.Lex(); // eat the {. 2776 2777 int FunctionNumber = -1; 2778 if (!Fn.hasName()) FunctionNumber = NumberedVals.size()-1; 2779 2780 PerFunctionState PFS(*this, Fn, FunctionNumber); 2781 2782 // We need at least one basic block. 2783 if (Lex.getKind() == lltok::rbrace || Lex.getKind() == lltok::kw_end) 2784 return TokError("function body requires at least one basic block"); 2785 2786 while (Lex.getKind() != lltok::rbrace && Lex.getKind() != lltok::kw_end) 2787 if (ParseBasicBlock(PFS)) return true; 2788 2789 // Eat the }. 2790 Lex.Lex(); 2791 2792 // Verify function is ok. 2793 return PFS.FinishFunction(); 2794} 2795 2796/// ParseBasicBlock 2797/// ::= LabelStr? Instruction* 2798bool LLParser::ParseBasicBlock(PerFunctionState &PFS) { 2799 // If this basic block starts out with a name, remember it. 2800 std::string Name; 2801 LocTy NameLoc = Lex.getLoc(); 2802 if (Lex.getKind() == lltok::LabelStr) { 2803 Name = Lex.getStrVal(); 2804 Lex.Lex(); 2805 } 2806 2807 BasicBlock *BB = PFS.DefineBB(Name, NameLoc); 2808 if (BB == 0) return true; 2809 2810 std::string NameStr; 2811 2812 // Parse the instructions in this block until we get a terminator. 2813 Instruction *Inst; 2814 SmallVector<std::pair<unsigned, MDNode *>, 4> MetadataOnInst; 2815 do { 2816 // This instruction may have three possibilities for a name: a) none 2817 // specified, b) name specified "%foo =", c) number specified: "%4 =". 2818 LocTy NameLoc = Lex.getLoc(); 2819 int NameID = -1; 2820 NameStr = ""; 2821 2822 if (Lex.getKind() == lltok::LocalVarID) { 2823 NameID = Lex.getUIntVal(); 2824 Lex.Lex(); 2825 if (ParseToken(lltok::equal, "expected '=' after instruction id")) 2826 return true; 2827 } else if (Lex.getKind() == lltok::LocalVar || 2828 // FIXME: REMOVE IN LLVM 3.0 2829 Lex.getKind() == lltok::StringConstant) { 2830 NameStr = Lex.getStrVal(); 2831 Lex.Lex(); 2832 if (ParseToken(lltok::equal, "expected '=' after instruction name")) 2833 return true; 2834 } 2835 2836 switch (ParseInstruction(Inst, BB, PFS)) { 2837 default: assert(0 && "Unknown ParseInstruction result!"); 2838 case InstError: return true; 2839 case InstNormal: 2840 // With a normal result, we check to see if the instruction is followed by 2841 // a comma and metadata. 2842 if (EatIfPresent(lltok::comma)) 2843 if (ParseInstructionMetadata(MetadataOnInst)) 2844 return true; 2845 break; 2846 case InstExtraComma: 2847 // If the instruction parser ate an extra comma at the end of it, it 2848 // *must* be followed by metadata. 2849 if (ParseInstructionMetadata(MetadataOnInst)) 2850 return true; 2851 break; 2852 } 2853 2854 // Set metadata attached with this instruction. 2855 for (unsigned i = 0, e = MetadataOnInst.size(); i != e; ++i) 2856 Inst->setMetadata(MetadataOnInst[i].first, MetadataOnInst[i].second); 2857 MetadataOnInst.clear(); 2858 2859 BB->getInstList().push_back(Inst); 2860 2861 // Set the name on the instruction. 2862 if (PFS.SetInstName(NameID, NameStr, NameLoc, Inst)) return true; 2863 } while (!isa<TerminatorInst>(Inst)); 2864 2865 return false; 2866} 2867 2868//===----------------------------------------------------------------------===// 2869// Instruction Parsing. 2870//===----------------------------------------------------------------------===// 2871 2872/// ParseInstruction - Parse one of the many different instructions. 2873/// 2874int LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB, 2875 PerFunctionState &PFS) { 2876 lltok::Kind Token = Lex.getKind(); 2877 if (Token == lltok::Eof) 2878 return TokError("found end of file when expecting more instructions"); 2879 LocTy Loc = Lex.getLoc(); 2880 unsigned KeywordVal = Lex.getUIntVal(); 2881 Lex.Lex(); // Eat the keyword. 2882 2883 switch (Token) { 2884 default: return Error(Loc, "expected instruction opcode"); 2885 // Terminator Instructions. 2886 case lltok::kw_unwind: Inst = new UnwindInst(Context); return false; 2887 case lltok::kw_unreachable: Inst = new UnreachableInst(Context); return false; 2888 case lltok::kw_ret: return ParseRet(Inst, BB, PFS); 2889 case lltok::kw_br: return ParseBr(Inst, PFS); 2890 case lltok::kw_switch: return ParseSwitch(Inst, PFS); 2891 case lltok::kw_indirectbr: return ParseIndirectBr(Inst, PFS); 2892 case lltok::kw_invoke: return ParseInvoke(Inst, PFS); 2893 // Binary Operators. 2894 case lltok::kw_add: 2895 case lltok::kw_sub: 2896 case lltok::kw_mul: { 2897 bool NUW = false; 2898 bool NSW = false; 2899 LocTy ModifierLoc = Lex.getLoc(); 2900 if (EatIfPresent(lltok::kw_nuw)) 2901 NUW = true; 2902 if (EatIfPresent(lltok::kw_nsw)) { 2903 NSW = true; 2904 if (EatIfPresent(lltok::kw_nuw)) 2905 NUW = true; 2906 } 2907 // API compatibility: Accept either integer or floating-point types. 2908 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 0); 2909 if (!Result) { 2910 if (!Inst->getType()->isIntOrIntVector()) { 2911 if (NUW) 2912 return Error(ModifierLoc, "nuw only applies to integer operations"); 2913 if (NSW) 2914 return Error(ModifierLoc, "nsw only applies to integer operations"); 2915 } 2916 if (NUW) 2917 cast<BinaryOperator>(Inst)->setHasNoUnsignedWrap(true); 2918 if (NSW) 2919 cast<BinaryOperator>(Inst)->setHasNoSignedWrap(true); 2920 } 2921 return Result; 2922 } 2923 case lltok::kw_fadd: 2924 case lltok::kw_fsub: 2925 case lltok::kw_fmul: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2926 2927 case lltok::kw_sdiv: { 2928 bool Exact = false; 2929 if (EatIfPresent(lltok::kw_exact)) 2930 Exact = true; 2931 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 1); 2932 if (!Result) 2933 if (Exact) 2934 cast<BinaryOperator>(Inst)->setIsExact(true); 2935 return Result; 2936 } 2937 2938 case lltok::kw_udiv: 2939 case lltok::kw_urem: 2940 case lltok::kw_srem: return ParseArithmetic(Inst, PFS, KeywordVal, 1); 2941 case lltok::kw_fdiv: 2942 case lltok::kw_frem: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 2943 case lltok::kw_shl: 2944 case lltok::kw_lshr: 2945 case lltok::kw_ashr: 2946 case lltok::kw_and: 2947 case lltok::kw_or: 2948 case lltok::kw_xor: return ParseLogical(Inst, PFS, KeywordVal); 2949 case lltok::kw_icmp: 2950 case lltok::kw_fcmp: return ParseCompare(Inst, PFS, KeywordVal); 2951 // Casts. 2952 case lltok::kw_trunc: 2953 case lltok::kw_zext: 2954 case lltok::kw_sext: 2955 case lltok::kw_fptrunc: 2956 case lltok::kw_fpext: 2957 case lltok::kw_bitcast: 2958 case lltok::kw_uitofp: 2959 case lltok::kw_sitofp: 2960 case lltok::kw_fptoui: 2961 case lltok::kw_fptosi: 2962 case lltok::kw_inttoptr: 2963 case lltok::kw_ptrtoint: return ParseCast(Inst, PFS, KeywordVal); 2964 // Other. 2965 case lltok::kw_select: return ParseSelect(Inst, PFS); 2966 case lltok::kw_va_arg: return ParseVA_Arg(Inst, PFS); 2967 case lltok::kw_extractelement: return ParseExtractElement(Inst, PFS); 2968 case lltok::kw_insertelement: return ParseInsertElement(Inst, PFS); 2969 case lltok::kw_shufflevector: return ParseShuffleVector(Inst, PFS); 2970 case lltok::kw_phi: return ParsePHI(Inst, PFS); 2971 case lltok::kw_call: return ParseCall(Inst, PFS, false); 2972 case lltok::kw_tail: return ParseCall(Inst, PFS, true); 2973 // Memory. 2974 case lltok::kw_alloca: return ParseAlloc(Inst, PFS); 2975 case lltok::kw_malloc: return ParseAlloc(Inst, PFS, BB, false); 2976 case lltok::kw_free: return ParseFree(Inst, PFS, BB); 2977 case lltok::kw_load: return ParseLoad(Inst, PFS, false); 2978 case lltok::kw_store: return ParseStore(Inst, PFS, false); 2979 case lltok::kw_volatile: 2980 if (EatIfPresent(lltok::kw_load)) 2981 return ParseLoad(Inst, PFS, true); 2982 else if (EatIfPresent(lltok::kw_store)) 2983 return ParseStore(Inst, PFS, true); 2984 else 2985 return TokError("expected 'load' or 'store'"); 2986 case lltok::kw_getresult: return ParseGetResult(Inst, PFS); 2987 case lltok::kw_getelementptr: return ParseGetElementPtr(Inst, PFS); 2988 case lltok::kw_extractvalue: return ParseExtractValue(Inst, PFS); 2989 case lltok::kw_insertvalue: return ParseInsertValue(Inst, PFS); 2990 } 2991} 2992 2993/// ParseCmpPredicate - Parse an integer or fp predicate, based on Kind. 2994bool LLParser::ParseCmpPredicate(unsigned &P, unsigned Opc) { 2995 if (Opc == Instruction::FCmp) { 2996 switch (Lex.getKind()) { 2997 default: TokError("expected fcmp predicate (e.g. 'oeq')"); 2998 case lltok::kw_oeq: P = CmpInst::FCMP_OEQ; break; 2999 case lltok::kw_one: P = CmpInst::FCMP_ONE; break; 3000 case lltok::kw_olt: P = CmpInst::FCMP_OLT; break; 3001 case lltok::kw_ogt: P = CmpInst::FCMP_OGT; break; 3002 case lltok::kw_ole: P = CmpInst::FCMP_OLE; break; 3003 case lltok::kw_oge: P = CmpInst::FCMP_OGE; break; 3004 case lltok::kw_ord: P = CmpInst::FCMP_ORD; break; 3005 case lltok::kw_uno: P = CmpInst::FCMP_UNO; break; 3006 case lltok::kw_ueq: P = CmpInst::FCMP_UEQ; break; 3007 case lltok::kw_une: P = CmpInst::FCMP_UNE; break; 3008 case lltok::kw_ult: P = CmpInst::FCMP_ULT; break; 3009 case lltok::kw_ugt: P = CmpInst::FCMP_UGT; break; 3010 case lltok::kw_ule: P = CmpInst::FCMP_ULE; break; 3011 case lltok::kw_uge: P = CmpInst::FCMP_UGE; break; 3012 case lltok::kw_true: P = CmpInst::FCMP_TRUE; break; 3013 case lltok::kw_false: P = CmpInst::FCMP_FALSE; break; 3014 } 3015 } else { 3016 switch (Lex.getKind()) { 3017 default: TokError("expected icmp predicate (e.g. 'eq')"); 3018 case lltok::kw_eq: P = CmpInst::ICMP_EQ; break; 3019 case lltok::kw_ne: P = CmpInst::ICMP_NE; break; 3020 case lltok::kw_slt: P = CmpInst::ICMP_SLT; break; 3021 case lltok::kw_sgt: P = CmpInst::ICMP_SGT; break; 3022 case lltok::kw_sle: P = CmpInst::ICMP_SLE; break; 3023 case lltok::kw_sge: P = CmpInst::ICMP_SGE; break; 3024 case lltok::kw_ult: P = CmpInst::ICMP_ULT; break; 3025 case lltok::kw_ugt: P = CmpInst::ICMP_UGT; break; 3026 case lltok::kw_ule: P = CmpInst::ICMP_ULE; break; 3027 case lltok::kw_uge: P = CmpInst::ICMP_UGE; break; 3028 } 3029 } 3030 Lex.Lex(); 3031 return false; 3032} 3033 3034//===----------------------------------------------------------------------===// 3035// Terminator Instructions. 3036//===----------------------------------------------------------------------===// 3037 3038/// ParseRet - Parse a return instruction. 3039/// ::= 'ret' void (',' !dbg, !1)* 3040/// ::= 'ret' TypeAndValue (',' !dbg, !1)* 3041/// ::= 'ret' TypeAndValue (',' TypeAndValue)+ (',' !dbg, !1)* 3042/// [[obsolete: LLVM 3.0]] 3043int LLParser::ParseRet(Instruction *&Inst, BasicBlock *BB, 3044 PerFunctionState &PFS) { 3045 PATypeHolder Ty(Type::getVoidTy(Context)); 3046 if (ParseType(Ty, true /*void allowed*/)) return true; 3047 3048 if (Ty->isVoidTy()) { 3049 Inst = ReturnInst::Create(Context); 3050 return false; 3051 } 3052 3053 Value *RV; 3054 if (ParseValue(Ty, RV, PFS)) return true; 3055 3056 bool ExtraComma = false; 3057 if (EatIfPresent(lltok::comma)) { 3058 // Parse optional custom metadata, e.g. !dbg 3059 if (Lex.getKind() == lltok::MetadataVar) { 3060 ExtraComma = true; 3061 } else { 3062 // The normal case is one return value. 3063 // FIXME: LLVM 3.0 remove MRV support for 'ret i32 1, i32 2', requiring 3064 // use of 'ret {i32,i32} {i32 1, i32 2}' 3065 SmallVector<Value*, 8> RVs; 3066 RVs.push_back(RV); 3067 3068 do { 3069 // If optional custom metadata, e.g. !dbg is seen then this is the 3070 // end of MRV. 3071 if (Lex.getKind() == lltok::MetadataVar) 3072 break; 3073 if (ParseTypeAndValue(RV, PFS)) return true; 3074 RVs.push_back(RV); 3075 } while (EatIfPresent(lltok::comma)); 3076 3077 RV = UndefValue::get(PFS.getFunction().getReturnType()); 3078 for (unsigned i = 0, e = RVs.size(); i != e; ++i) { 3079 Instruction *I = InsertValueInst::Create(RV, RVs[i], i, "mrv"); 3080 BB->getInstList().push_back(I); 3081 RV = I; 3082 } 3083 } 3084 } 3085 3086 Inst = ReturnInst::Create(Context, RV); 3087 return ExtraComma ? InstExtraComma : InstNormal; 3088} 3089 3090 3091/// ParseBr 3092/// ::= 'br' TypeAndValue 3093/// ::= 'br' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3094bool LLParser::ParseBr(Instruction *&Inst, PerFunctionState &PFS) { 3095 LocTy Loc, Loc2; 3096 Value *Op0; 3097 BasicBlock *Op1, *Op2; 3098 if (ParseTypeAndValue(Op0, Loc, PFS)) return true; 3099 3100 if (BasicBlock *BB = dyn_cast<BasicBlock>(Op0)) { 3101 Inst = BranchInst::Create(BB); 3102 return false; 3103 } 3104 3105 if (Op0->getType() != Type::getInt1Ty(Context)) 3106 return Error(Loc, "branch condition must have 'i1' type"); 3107 3108 if (ParseToken(lltok::comma, "expected ',' after branch condition") || 3109 ParseTypeAndBasicBlock(Op1, Loc, PFS) || 3110 ParseToken(lltok::comma, "expected ',' after true destination") || 3111 ParseTypeAndBasicBlock(Op2, Loc2, PFS)) 3112 return true; 3113 3114 Inst = BranchInst::Create(Op1, Op2, Op0); 3115 return false; 3116} 3117 3118/// ParseSwitch 3119/// Instruction 3120/// ::= 'switch' TypeAndValue ',' TypeAndValue '[' JumpTable ']' 3121/// JumpTable 3122/// ::= (TypeAndValue ',' TypeAndValue)* 3123bool LLParser::ParseSwitch(Instruction *&Inst, PerFunctionState &PFS) { 3124 LocTy CondLoc, BBLoc; 3125 Value *Cond; 3126 BasicBlock *DefaultBB; 3127 if (ParseTypeAndValue(Cond, CondLoc, PFS) || 3128 ParseToken(lltok::comma, "expected ',' after switch condition") || 3129 ParseTypeAndBasicBlock(DefaultBB, BBLoc, PFS) || 3130 ParseToken(lltok::lsquare, "expected '[' with switch table")) 3131 return true; 3132 3133 if (!isa<IntegerType>(Cond->getType())) 3134 return Error(CondLoc, "switch condition must have integer type"); 3135 3136 // Parse the jump table pairs. 3137 SmallPtrSet<Value*, 32> SeenCases; 3138 SmallVector<std::pair<ConstantInt*, BasicBlock*>, 32> Table; 3139 while (Lex.getKind() != lltok::rsquare) { 3140 Value *Constant; 3141 BasicBlock *DestBB; 3142 3143 if (ParseTypeAndValue(Constant, CondLoc, PFS) || 3144 ParseToken(lltok::comma, "expected ',' after case value") || 3145 ParseTypeAndBasicBlock(DestBB, PFS)) 3146 return true; 3147 3148 if (!SeenCases.insert(Constant)) 3149 return Error(CondLoc, "duplicate case value in switch"); 3150 if (!isa<ConstantInt>(Constant)) 3151 return Error(CondLoc, "case value is not a constant integer"); 3152 3153 Table.push_back(std::make_pair(cast<ConstantInt>(Constant), DestBB)); 3154 } 3155 3156 Lex.Lex(); // Eat the ']'. 3157 3158 SwitchInst *SI = SwitchInst::Create(Cond, DefaultBB, Table.size()); 3159 for (unsigned i = 0, e = Table.size(); i != e; ++i) 3160 SI->addCase(Table[i].first, Table[i].second); 3161 Inst = SI; 3162 return false; 3163} 3164 3165/// ParseIndirectBr 3166/// Instruction 3167/// ::= 'indirectbr' TypeAndValue ',' '[' LabelList ']' 3168bool LLParser::ParseIndirectBr(Instruction *&Inst, PerFunctionState &PFS) { 3169 LocTy AddrLoc; 3170 Value *Address; 3171 if (ParseTypeAndValue(Address, AddrLoc, PFS) || 3172 ParseToken(lltok::comma, "expected ',' after indirectbr address") || 3173 ParseToken(lltok::lsquare, "expected '[' with indirectbr")) 3174 return true; 3175 3176 if (!isa<PointerType>(Address->getType())) 3177 return Error(AddrLoc, "indirectbr address must have pointer type"); 3178 3179 // Parse the destination list. 3180 SmallVector<BasicBlock*, 16> DestList; 3181 3182 if (Lex.getKind() != lltok::rsquare) { 3183 BasicBlock *DestBB; 3184 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3185 return true; 3186 DestList.push_back(DestBB); 3187 3188 while (EatIfPresent(lltok::comma)) { 3189 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3190 return true; 3191 DestList.push_back(DestBB); 3192 } 3193 } 3194 3195 if (ParseToken(lltok::rsquare, "expected ']' at end of block list")) 3196 return true; 3197 3198 IndirectBrInst *IBI = IndirectBrInst::Create(Address, DestList.size()); 3199 for (unsigned i = 0, e = DestList.size(); i != e; ++i) 3200 IBI->addDestination(DestList[i]); 3201 Inst = IBI; 3202 return false; 3203} 3204 3205 3206/// ParseInvoke 3207/// ::= 'invoke' OptionalCallingConv OptionalAttrs Type Value ParamList 3208/// OptionalAttrs 'to' TypeAndValue 'unwind' TypeAndValue 3209bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) { 3210 LocTy CallLoc = Lex.getLoc(); 3211 unsigned RetAttrs, FnAttrs; 3212 CallingConv::ID CC; 3213 PATypeHolder RetType(Type::getVoidTy(Context)); 3214 LocTy RetTypeLoc; 3215 ValID CalleeID; 3216 SmallVector<ParamInfo, 16> ArgList; 3217 3218 BasicBlock *NormalBB, *UnwindBB; 3219 if (ParseOptionalCallingConv(CC) || 3220 ParseOptionalAttrs(RetAttrs, 1) || 3221 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3222 ParseValID(CalleeID) || 3223 ParseParameterList(ArgList, PFS) || 3224 ParseOptionalAttrs(FnAttrs, 2) || 3225 ParseToken(lltok::kw_to, "expected 'to' in invoke") || 3226 ParseTypeAndBasicBlock(NormalBB, PFS) || 3227 ParseToken(lltok::kw_unwind, "expected 'unwind' in invoke") || 3228 ParseTypeAndBasicBlock(UnwindBB, PFS)) 3229 return true; 3230 3231 // If RetType is a non-function pointer type, then this is the short syntax 3232 // for the call, which means that RetType is just the return type. Infer the 3233 // rest of the function argument types from the arguments that are present. 3234 const PointerType *PFTy = 0; 3235 const FunctionType *Ty = 0; 3236 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3237 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3238 // Pull out the types of all of the arguments... 3239 std::vector<const Type*> ParamTypes; 3240 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3241 ParamTypes.push_back(ArgList[i].V->getType()); 3242 3243 if (!FunctionType::isValidReturnType(RetType)) 3244 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3245 3246 Ty = FunctionType::get(RetType, ParamTypes, false); 3247 PFTy = PointerType::getUnqual(Ty); 3248 } 3249 3250 // Look up the callee. 3251 Value *Callee; 3252 if (ConvertValIDToValue(PFTy, CalleeID, Callee, PFS)) return true; 3253 3254 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 3255 // function attributes. 3256 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 3257 if (FnAttrs & ObsoleteFuncAttrs) { 3258 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 3259 FnAttrs &= ~ObsoleteFuncAttrs; 3260 } 3261 3262 // Set up the Attributes for the function. 3263 SmallVector<AttributeWithIndex, 8> Attrs; 3264 if (RetAttrs != Attribute::None) 3265 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3266 3267 SmallVector<Value*, 8> Args; 3268 3269 // Loop through FunctionType's arguments and ensure they are specified 3270 // correctly. Also, gather any parameter attributes. 3271 FunctionType::param_iterator I = Ty->param_begin(); 3272 FunctionType::param_iterator E = Ty->param_end(); 3273 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3274 const Type *ExpectedTy = 0; 3275 if (I != E) { 3276 ExpectedTy = *I++; 3277 } else if (!Ty->isVarArg()) { 3278 return Error(ArgList[i].Loc, "too many arguments specified"); 3279 } 3280 3281 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3282 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3283 ExpectedTy->getDescription() + "'"); 3284 Args.push_back(ArgList[i].V); 3285 if (ArgList[i].Attrs != Attribute::None) 3286 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3287 } 3288 3289 if (I != E) 3290 return Error(CallLoc, "not enough parameters specified for call"); 3291 3292 if (FnAttrs != Attribute::None) 3293 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3294 3295 // Finish off the Attributes and check them 3296 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3297 3298 InvokeInst *II = InvokeInst::Create(Callee, NormalBB, UnwindBB, 3299 Args.begin(), Args.end()); 3300 II->setCallingConv(CC); 3301 II->setAttributes(PAL); 3302 Inst = II; 3303 return false; 3304} 3305 3306 3307 3308//===----------------------------------------------------------------------===// 3309// Binary Operators. 3310//===----------------------------------------------------------------------===// 3311 3312/// ParseArithmetic 3313/// ::= ArithmeticOps TypeAndValue ',' Value 3314/// 3315/// If OperandType is 0, then any FP or integer operand is allowed. If it is 1, 3316/// then any integer operand is allowed, if it is 2, any fp operand is allowed. 3317bool LLParser::ParseArithmetic(Instruction *&Inst, PerFunctionState &PFS, 3318 unsigned Opc, unsigned OperandType) { 3319 LocTy Loc; Value *LHS, *RHS; 3320 if (ParseTypeAndValue(LHS, Loc, PFS) || 3321 ParseToken(lltok::comma, "expected ',' in arithmetic operation") || 3322 ParseValue(LHS->getType(), RHS, PFS)) 3323 return true; 3324 3325 bool Valid; 3326 switch (OperandType) { 3327 default: llvm_unreachable("Unknown operand type!"); 3328 case 0: // int or FP. 3329 Valid = LHS->getType()->isIntOrIntVector() || 3330 LHS->getType()->isFPOrFPVector(); 3331 break; 3332 case 1: Valid = LHS->getType()->isIntOrIntVector(); break; 3333 case 2: Valid = LHS->getType()->isFPOrFPVector(); break; 3334 } 3335 3336 if (!Valid) 3337 return Error(Loc, "invalid operand type for instruction"); 3338 3339 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3340 return false; 3341} 3342 3343/// ParseLogical 3344/// ::= ArithmeticOps TypeAndValue ',' Value { 3345bool LLParser::ParseLogical(Instruction *&Inst, PerFunctionState &PFS, 3346 unsigned Opc) { 3347 LocTy Loc; Value *LHS, *RHS; 3348 if (ParseTypeAndValue(LHS, Loc, PFS) || 3349 ParseToken(lltok::comma, "expected ',' in logical operation") || 3350 ParseValue(LHS->getType(), RHS, PFS)) 3351 return true; 3352 3353 if (!LHS->getType()->isIntOrIntVector()) 3354 return Error(Loc,"instruction requires integer or integer vector operands"); 3355 3356 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3357 return false; 3358} 3359 3360 3361/// ParseCompare 3362/// ::= 'icmp' IPredicates TypeAndValue ',' Value 3363/// ::= 'fcmp' FPredicates TypeAndValue ',' Value 3364bool LLParser::ParseCompare(Instruction *&Inst, PerFunctionState &PFS, 3365 unsigned Opc) { 3366 // Parse the integer/fp comparison predicate. 3367 LocTy Loc; 3368 unsigned Pred; 3369 Value *LHS, *RHS; 3370 if (ParseCmpPredicate(Pred, Opc) || 3371 ParseTypeAndValue(LHS, Loc, PFS) || 3372 ParseToken(lltok::comma, "expected ',' after compare value") || 3373 ParseValue(LHS->getType(), RHS, PFS)) 3374 return true; 3375 3376 if (Opc == Instruction::FCmp) { 3377 if (!LHS->getType()->isFPOrFPVector()) 3378 return Error(Loc, "fcmp requires floating point operands"); 3379 Inst = new FCmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3380 } else { 3381 assert(Opc == Instruction::ICmp && "Unknown opcode for CmpInst!"); 3382 if (!LHS->getType()->isIntOrIntVector() && 3383 !isa<PointerType>(LHS->getType())) 3384 return Error(Loc, "icmp requires integer operands"); 3385 Inst = new ICmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3386 } 3387 return false; 3388} 3389 3390//===----------------------------------------------------------------------===// 3391// Other Instructions. 3392//===----------------------------------------------------------------------===// 3393 3394 3395/// ParseCast 3396/// ::= CastOpc TypeAndValue 'to' Type 3397bool LLParser::ParseCast(Instruction *&Inst, PerFunctionState &PFS, 3398 unsigned Opc) { 3399 LocTy Loc; Value *Op; 3400 PATypeHolder DestTy(Type::getVoidTy(Context)); 3401 if (ParseTypeAndValue(Op, Loc, PFS) || 3402 ParseToken(lltok::kw_to, "expected 'to' after cast value") || 3403 ParseType(DestTy)) 3404 return true; 3405 3406 if (!CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy)) { 3407 CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy); 3408 return Error(Loc, "invalid cast opcode for cast from '" + 3409 Op->getType()->getDescription() + "' to '" + 3410 DestTy->getDescription() + "'"); 3411 } 3412 Inst = CastInst::Create((Instruction::CastOps)Opc, Op, DestTy); 3413 return false; 3414} 3415 3416/// ParseSelect 3417/// ::= 'select' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3418bool LLParser::ParseSelect(Instruction *&Inst, PerFunctionState &PFS) { 3419 LocTy Loc; 3420 Value *Op0, *Op1, *Op2; 3421 if (ParseTypeAndValue(Op0, Loc, PFS) || 3422 ParseToken(lltok::comma, "expected ',' after select condition") || 3423 ParseTypeAndValue(Op1, PFS) || 3424 ParseToken(lltok::comma, "expected ',' after select value") || 3425 ParseTypeAndValue(Op2, PFS)) 3426 return true; 3427 3428 if (const char *Reason = SelectInst::areInvalidOperands(Op0, Op1, Op2)) 3429 return Error(Loc, Reason); 3430 3431 Inst = SelectInst::Create(Op0, Op1, Op2); 3432 return false; 3433} 3434 3435/// ParseVA_Arg 3436/// ::= 'va_arg' TypeAndValue ',' Type 3437bool LLParser::ParseVA_Arg(Instruction *&Inst, PerFunctionState &PFS) { 3438 Value *Op; 3439 PATypeHolder EltTy(Type::getVoidTy(Context)); 3440 LocTy TypeLoc; 3441 if (ParseTypeAndValue(Op, PFS) || 3442 ParseToken(lltok::comma, "expected ',' after vaarg operand") || 3443 ParseType(EltTy, TypeLoc)) 3444 return true; 3445 3446 if (!EltTy->isFirstClassType()) 3447 return Error(TypeLoc, "va_arg requires operand with first class type"); 3448 3449 Inst = new VAArgInst(Op, EltTy); 3450 return false; 3451} 3452 3453/// ParseExtractElement 3454/// ::= 'extractelement' TypeAndValue ',' TypeAndValue 3455bool LLParser::ParseExtractElement(Instruction *&Inst, PerFunctionState &PFS) { 3456 LocTy Loc; 3457 Value *Op0, *Op1; 3458 if (ParseTypeAndValue(Op0, Loc, PFS) || 3459 ParseToken(lltok::comma, "expected ',' after extract value") || 3460 ParseTypeAndValue(Op1, PFS)) 3461 return true; 3462 3463 if (!ExtractElementInst::isValidOperands(Op0, Op1)) 3464 return Error(Loc, "invalid extractelement operands"); 3465 3466 Inst = ExtractElementInst::Create(Op0, Op1); 3467 return false; 3468} 3469 3470/// ParseInsertElement 3471/// ::= 'insertelement' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3472bool LLParser::ParseInsertElement(Instruction *&Inst, PerFunctionState &PFS) { 3473 LocTy Loc; 3474 Value *Op0, *Op1, *Op2; 3475 if (ParseTypeAndValue(Op0, Loc, PFS) || 3476 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3477 ParseTypeAndValue(Op1, PFS) || 3478 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3479 ParseTypeAndValue(Op2, PFS)) 3480 return true; 3481 3482 if (!InsertElementInst::isValidOperands(Op0, Op1, Op2)) 3483 return Error(Loc, "invalid insertelement operands"); 3484 3485 Inst = InsertElementInst::Create(Op0, Op1, Op2); 3486 return false; 3487} 3488 3489/// ParseShuffleVector 3490/// ::= 'shufflevector' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3491bool LLParser::ParseShuffleVector(Instruction *&Inst, PerFunctionState &PFS) { 3492 LocTy Loc; 3493 Value *Op0, *Op1, *Op2; 3494 if (ParseTypeAndValue(Op0, Loc, PFS) || 3495 ParseToken(lltok::comma, "expected ',' after shuffle mask") || 3496 ParseTypeAndValue(Op1, PFS) || 3497 ParseToken(lltok::comma, "expected ',' after shuffle value") || 3498 ParseTypeAndValue(Op2, PFS)) 3499 return true; 3500 3501 if (!ShuffleVectorInst::isValidOperands(Op0, Op1, Op2)) 3502 return Error(Loc, "invalid extractelement operands"); 3503 3504 Inst = new ShuffleVectorInst(Op0, Op1, Op2); 3505 return false; 3506} 3507 3508/// ParsePHI 3509/// ::= 'phi' Type '[' Value ',' Value ']' (',' '[' Value ',' Value ']')* 3510int LLParser::ParsePHI(Instruction *&Inst, PerFunctionState &PFS) { 3511 PATypeHolder Ty(Type::getVoidTy(Context)); 3512 Value *Op0, *Op1; 3513 LocTy TypeLoc = Lex.getLoc(); 3514 3515 if (ParseType(Ty) || 3516 ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3517 ParseValue(Ty, Op0, PFS) || 3518 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3519 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3520 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3521 return true; 3522 3523 bool AteExtraComma = false; 3524 SmallVector<std::pair<Value*, BasicBlock*>, 16> PHIVals; 3525 while (1) { 3526 PHIVals.push_back(std::make_pair(Op0, cast<BasicBlock>(Op1))); 3527 3528 if (!EatIfPresent(lltok::comma)) 3529 break; 3530 3531 if (Lex.getKind() == lltok::MetadataVar) { 3532 AteExtraComma = true; 3533 break; 3534 } 3535 3536 if (ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3537 ParseValue(Ty, Op0, PFS) || 3538 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3539 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3540 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3541 return true; 3542 } 3543 3544 if (!Ty->isFirstClassType()) 3545 return Error(TypeLoc, "phi node must have first class type"); 3546 3547 PHINode *PN = PHINode::Create(Ty); 3548 PN->reserveOperandSpace(PHIVals.size()); 3549 for (unsigned i = 0, e = PHIVals.size(); i != e; ++i) 3550 PN->addIncoming(PHIVals[i].first, PHIVals[i].second); 3551 Inst = PN; 3552 return AteExtraComma ? InstExtraComma : InstNormal; 3553} 3554 3555/// ParseCall 3556/// ::= 'tail'? 'call' OptionalCallingConv OptionalAttrs Type Value 3557/// ParameterList OptionalAttrs 3558bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS, 3559 bool isTail) { 3560 unsigned RetAttrs, FnAttrs; 3561 CallingConv::ID CC; 3562 PATypeHolder RetType(Type::getVoidTy(Context)); 3563 LocTy RetTypeLoc; 3564 ValID CalleeID; 3565 SmallVector<ParamInfo, 16> ArgList; 3566 LocTy CallLoc = Lex.getLoc(); 3567 3568 if ((isTail && ParseToken(lltok::kw_call, "expected 'tail call'")) || 3569 ParseOptionalCallingConv(CC) || 3570 ParseOptionalAttrs(RetAttrs, 1) || 3571 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3572 ParseValID(CalleeID) || 3573 ParseParameterList(ArgList, PFS) || 3574 ParseOptionalAttrs(FnAttrs, 2)) 3575 return true; 3576 3577 // If RetType is a non-function pointer type, then this is the short syntax 3578 // for the call, which means that RetType is just the return type. Infer the 3579 // rest of the function argument types from the arguments that are present. 3580 const PointerType *PFTy = 0; 3581 const FunctionType *Ty = 0; 3582 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3583 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3584 // Pull out the types of all of the arguments... 3585 std::vector<const Type*> ParamTypes; 3586 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3587 ParamTypes.push_back(ArgList[i].V->getType()); 3588 3589 if (!FunctionType::isValidReturnType(RetType)) 3590 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3591 3592 Ty = FunctionType::get(RetType, ParamTypes, false); 3593 PFTy = PointerType::getUnqual(Ty); 3594 } 3595 3596 // Look up the callee. 3597 Value *Callee; 3598 if (ConvertValIDToValue(PFTy, CalleeID, Callee, PFS)) return true; 3599 3600 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 3601 // function attributes. 3602 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 3603 if (FnAttrs & ObsoleteFuncAttrs) { 3604 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 3605 FnAttrs &= ~ObsoleteFuncAttrs; 3606 } 3607 3608 // Set up the Attributes for the function. 3609 SmallVector<AttributeWithIndex, 8> Attrs; 3610 if (RetAttrs != Attribute::None) 3611 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3612 3613 SmallVector<Value*, 8> Args; 3614 3615 // Loop through FunctionType's arguments and ensure they are specified 3616 // correctly. Also, gather any parameter attributes. 3617 FunctionType::param_iterator I = Ty->param_begin(); 3618 FunctionType::param_iterator E = Ty->param_end(); 3619 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3620 const Type *ExpectedTy = 0; 3621 if (I != E) { 3622 ExpectedTy = *I++; 3623 } else if (!Ty->isVarArg()) { 3624 return Error(ArgList[i].Loc, "too many arguments specified"); 3625 } 3626 3627 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3628 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3629 ExpectedTy->getDescription() + "'"); 3630 Args.push_back(ArgList[i].V); 3631 if (ArgList[i].Attrs != Attribute::None) 3632 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3633 } 3634 3635 if (I != E) 3636 return Error(CallLoc, "not enough parameters specified for call"); 3637 3638 if (FnAttrs != Attribute::None) 3639 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3640 3641 // Finish off the Attributes and check them 3642 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3643 3644 CallInst *CI = CallInst::Create(Callee, Args.begin(), Args.end()); 3645 CI->setTailCall(isTail); 3646 CI->setCallingConv(CC); 3647 CI->setAttributes(PAL); 3648 Inst = CI; 3649 return false; 3650} 3651 3652//===----------------------------------------------------------------------===// 3653// Memory Instructions. 3654//===----------------------------------------------------------------------===// 3655 3656/// ParseAlloc 3657/// ::= 'malloc' Type (',' TypeAndValue)? (',' OptionalInfo)? 3658/// ::= 'alloca' Type (',' TypeAndValue)? (',' OptionalInfo)? 3659int LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS, 3660 BasicBlock* BB, bool isAlloca) { 3661 PATypeHolder Ty(Type::getVoidTy(Context)); 3662 Value *Size = 0; 3663 LocTy SizeLoc; 3664 unsigned Alignment = 0; 3665 if (ParseType(Ty)) return true; 3666 3667 bool AteExtraComma = false; 3668 if (EatIfPresent(lltok::comma)) { 3669 if (Lex.getKind() == lltok::kw_align) { 3670 if (ParseOptionalAlignment(Alignment)) return true; 3671 } else if (Lex.getKind() == lltok::MetadataVar) { 3672 AteExtraComma = true; 3673 } else { 3674 if (ParseTypeAndValue(Size, SizeLoc, PFS) || 3675 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3676 return true; 3677 } 3678 } 3679 3680 if (Size && !Size->getType()->isInteger(32)) 3681 return Error(SizeLoc, "element count must be i32"); 3682 3683 if (isAlloca) { 3684 Inst = new AllocaInst(Ty, Size, Alignment); 3685 return AteExtraComma ? InstExtraComma : InstNormal; 3686 } 3687 3688 // Autoupgrade old malloc instruction to malloc call. 3689 // FIXME: Remove in LLVM 3.0. 3690 const Type *IntPtrTy = Type::getInt32Ty(Context); 3691 Constant *AllocSize = ConstantExpr::getSizeOf(Ty); 3692 AllocSize = ConstantExpr::getTruncOrBitCast(AllocSize, IntPtrTy); 3693 if (!MallocF) 3694 // Prototype malloc as "void *(int32)". 3695 // This function is renamed as "malloc" in ValidateEndOfModule(). 3696 MallocF = cast<Function>( 3697 M->getOrInsertFunction("", Type::getInt8PtrTy(Context), IntPtrTy, NULL)); 3698 Inst = CallInst::CreateMalloc(BB, IntPtrTy, Ty, AllocSize, Size, MallocF); 3699return AteExtraComma ? InstExtraComma : InstNormal; 3700} 3701 3702/// ParseFree 3703/// ::= 'free' TypeAndValue 3704bool LLParser::ParseFree(Instruction *&Inst, PerFunctionState &PFS, 3705 BasicBlock* BB) { 3706 Value *Val; LocTy Loc; 3707 if (ParseTypeAndValue(Val, Loc, PFS)) return true; 3708 if (!isa<PointerType>(Val->getType())) 3709 return Error(Loc, "operand to free must be a pointer"); 3710 Inst = CallInst::CreateFree(Val, BB); 3711 return false; 3712} 3713 3714/// ParseLoad 3715/// ::= 'volatile'? 'load' TypeAndValue (',' OptionalInfo)? 3716int LLParser::ParseLoad(Instruction *&Inst, PerFunctionState &PFS, 3717 bool isVolatile) { 3718 Value *Val; LocTy Loc; 3719 unsigned Alignment = 0; 3720 bool AteExtraComma = false; 3721 if (ParseTypeAndValue(Val, Loc, PFS) || 3722 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3723 return true; 3724 3725 if (!isa<PointerType>(Val->getType()) || 3726 !cast<PointerType>(Val->getType())->getElementType()->isFirstClassType()) 3727 return Error(Loc, "load operand must be a pointer to a first class type"); 3728 3729 Inst = new LoadInst(Val, "", isVolatile, Alignment); 3730 return AteExtraComma ? InstExtraComma : InstNormal; 3731} 3732 3733/// ParseStore 3734/// ::= 'volatile'? 'store' TypeAndValue ',' TypeAndValue (',' 'align' i32)? 3735int LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS, 3736 bool isVolatile) { 3737 Value *Val, *Ptr; LocTy Loc, PtrLoc; 3738 unsigned Alignment = 0; 3739 bool AteExtraComma = false; 3740 if (ParseTypeAndValue(Val, Loc, PFS) || 3741 ParseToken(lltok::comma, "expected ',' after store operand") || 3742 ParseTypeAndValue(Ptr, PtrLoc, PFS) || 3743 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3744 return true; 3745 3746 if (!isa<PointerType>(Ptr->getType())) 3747 return Error(PtrLoc, "store operand must be a pointer"); 3748 if (!Val->getType()->isFirstClassType()) 3749 return Error(Loc, "store operand must be a first class value"); 3750 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType()) 3751 return Error(Loc, "stored value and pointer type do not match"); 3752 3753 Inst = new StoreInst(Val, Ptr, isVolatile, Alignment); 3754 return AteExtraComma ? InstExtraComma : InstNormal; 3755} 3756 3757/// ParseGetResult 3758/// ::= 'getresult' TypeAndValue ',' i32 3759/// FIXME: Remove support for getresult in LLVM 3.0 3760bool LLParser::ParseGetResult(Instruction *&Inst, PerFunctionState &PFS) { 3761 Value *Val; LocTy ValLoc, EltLoc; 3762 unsigned Element; 3763 if (ParseTypeAndValue(Val, ValLoc, PFS) || 3764 ParseToken(lltok::comma, "expected ',' after getresult operand") || 3765 ParseUInt32(Element, EltLoc)) 3766 return true; 3767 3768 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 3769 return Error(ValLoc, "getresult inst requires an aggregate operand"); 3770 if (!ExtractValueInst::getIndexedType(Val->getType(), Element)) 3771 return Error(EltLoc, "invalid getresult index for value"); 3772 Inst = ExtractValueInst::Create(Val, Element); 3773 return false; 3774} 3775 3776/// ParseGetElementPtr 3777/// ::= 'getelementptr' 'inbounds'? TypeAndValue (',' TypeAndValue)* 3778int LLParser::ParseGetElementPtr(Instruction *&Inst, PerFunctionState &PFS) { 3779 Value *Ptr, *Val; LocTy Loc, EltLoc; 3780 3781 bool InBounds = EatIfPresent(lltok::kw_inbounds); 3782 3783 if (ParseTypeAndValue(Ptr, Loc, PFS)) return true; 3784 3785 if (!isa<PointerType>(Ptr->getType())) 3786 return Error(Loc, "base of getelementptr must be a pointer"); 3787 3788 SmallVector<Value*, 16> Indices; 3789 bool AteExtraComma = false; 3790 while (EatIfPresent(lltok::comma)) { 3791 if (Lex.getKind() == lltok::MetadataVar) { 3792 AteExtraComma = true; 3793 break; 3794 } 3795 if (ParseTypeAndValue(Val, EltLoc, PFS)) return true; 3796 if (!isa<IntegerType>(Val->getType())) 3797 return Error(EltLoc, "getelementptr index must be an integer"); 3798 Indices.push_back(Val); 3799 } 3800 3801 if (!GetElementPtrInst::getIndexedType(Ptr->getType(), 3802 Indices.begin(), Indices.end())) 3803 return Error(Loc, "invalid getelementptr indices"); 3804 Inst = GetElementPtrInst::Create(Ptr, Indices.begin(), Indices.end()); 3805 if (InBounds) 3806 cast<GetElementPtrInst>(Inst)->setIsInBounds(true); 3807 return AteExtraComma ? InstExtraComma : InstNormal; 3808} 3809 3810/// ParseExtractValue 3811/// ::= 'extractvalue' TypeAndValue (',' uint32)+ 3812int LLParser::ParseExtractValue(Instruction *&Inst, PerFunctionState &PFS) { 3813 Value *Val; LocTy Loc; 3814 SmallVector<unsigned, 4> Indices; 3815 bool AteExtraComma; 3816 if (ParseTypeAndValue(Val, Loc, PFS) || 3817 ParseIndexList(Indices, AteExtraComma)) 3818 return true; 3819 3820 if (!isa<StructType>(Val->getType()) && !isa<ArrayType>(Val->getType())) 3821 return Error(Loc, "extractvalue operand must be array or struct"); 3822 3823 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 3824 Indices.end())) 3825 return Error(Loc, "invalid indices for extractvalue"); 3826 Inst = ExtractValueInst::Create(Val, Indices.begin(), Indices.end()); 3827 return AteExtraComma ? InstExtraComma : InstNormal; 3828} 3829 3830/// ParseInsertValue 3831/// ::= 'insertvalue' TypeAndValue ',' TypeAndValue (',' uint32)+ 3832int LLParser::ParseInsertValue(Instruction *&Inst, PerFunctionState &PFS) { 3833 Value *Val0, *Val1; LocTy Loc0, Loc1; 3834 SmallVector<unsigned, 4> Indices; 3835 bool AteExtraComma; 3836 if (ParseTypeAndValue(Val0, Loc0, PFS) || 3837 ParseToken(lltok::comma, "expected comma after insertvalue operand") || 3838 ParseTypeAndValue(Val1, Loc1, PFS) || 3839 ParseIndexList(Indices, AteExtraComma)) 3840 return true; 3841 3842 if (!isa<StructType>(Val0->getType()) && !isa<ArrayType>(Val0->getType())) 3843 return Error(Loc0, "extractvalue operand must be array or struct"); 3844 3845 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 3846 Indices.end())) 3847 return Error(Loc0, "invalid indices for insertvalue"); 3848 Inst = InsertValueInst::Create(Val0, Val1, Indices.begin(), Indices.end()); 3849 return AteExtraComma ? InstExtraComma : InstNormal; 3850} 3851 3852//===----------------------------------------------------------------------===// 3853// Embedded metadata. 3854//===----------------------------------------------------------------------===// 3855 3856/// ParseMDNodeVector 3857/// ::= Element (',' Element)* 3858/// Element 3859/// ::= 'null' | TypeAndValue 3860bool LLParser::ParseMDNodeVector(SmallVectorImpl<Value*> &Elts, 3861 PerFunctionState *PFS, bool *isFunctionLocal) { 3862 do { 3863 // Null is a special case since it is typeless. 3864 if (EatIfPresent(lltok::kw_null)) { 3865 Elts.push_back(0); 3866 continue; 3867 } 3868 3869 Value *V = 0; 3870 PATypeHolder Ty(Type::getVoidTy(Context)); 3871 ValID ID; 3872 if (ParseType(Ty) || ParseValID(ID, PFS) || 3873 ConvertGlobalOrMetadataValIDToValue(Ty, ID, V, PFS, isFunctionLocal)) 3874 return true; 3875 3876 Elts.push_back(V); 3877 } while (EatIfPresent(lltok::comma)); 3878 3879 return false; 3880} 3881