LLParser.cpp revision f1cfb953375b726f999976924f95fb80db3c1c97
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 // Handle any instruction metadata forward references. 43 if (!ForwardRefInstMetadata.empty()) { 44 for (DenseMap<Instruction*, std::vector<MDRef> >::iterator 45 I = ForwardRefInstMetadata.begin(), E = ForwardRefInstMetadata.end(); 46 I != E; ++I) { 47 Instruction *Inst = I->first; 48 const std::vector<MDRef> &MDList = I->second; 49 50 for (unsigned i = 0, e = MDList.size(); i != e; ++i) { 51 unsigned SlotNo = MDList[i].MDSlot; 52 53 if (SlotNo >= NumberedMetadata.size() || NumberedMetadata[SlotNo] == 0) 54 return Error(MDList[i].Loc, "use of undefined metadata '!" + 55 utostr(SlotNo) + "'"); 56 Inst->setMetadata(MDList[i].MDKind, NumberedMetadata[SlotNo]); 57 } 58 } 59 ForwardRefInstMetadata.clear(); 60 } 61 62 63 // Update auto-upgraded malloc calls to "malloc". 64 // FIXME: Remove in LLVM 3.0. 65 if (MallocF) { 66 MallocF->setName("malloc"); 67 // If setName() does not set the name to "malloc", then there is already a 68 // declaration of "malloc". In that case, iterate over all calls to MallocF 69 // and get them to call the declared "malloc" instead. 70 if (MallocF->getName() != "malloc") { 71 Constant *RealMallocF = M->getFunction("malloc"); 72 if (RealMallocF->getType() != MallocF->getType()) 73 RealMallocF = ConstantExpr::getBitCast(RealMallocF, MallocF->getType()); 74 MallocF->replaceAllUsesWith(RealMallocF); 75 MallocF->eraseFromParent(); 76 MallocF = NULL; 77 } 78 } 79 80 81 // If there are entries in ForwardRefBlockAddresses at this point, they are 82 // references after the function was defined. Resolve those now. 83 while (!ForwardRefBlockAddresses.empty()) { 84 // Okay, we are referencing an already-parsed function, resolve them now. 85 Function *TheFn = 0; 86 const ValID &Fn = ForwardRefBlockAddresses.begin()->first; 87 if (Fn.Kind == ValID::t_GlobalName) 88 TheFn = M->getFunction(Fn.StrVal); 89 else if (Fn.UIntVal < NumberedVals.size()) 90 TheFn = dyn_cast<Function>(NumberedVals[Fn.UIntVal]); 91 92 if (TheFn == 0) 93 return Error(Fn.Loc, "unknown function referenced by blockaddress"); 94 95 // Resolve all these references. 96 if (ResolveForwardRefBlockAddresses(TheFn, 97 ForwardRefBlockAddresses.begin()->second, 98 0)) 99 return true; 100 101 ForwardRefBlockAddresses.erase(ForwardRefBlockAddresses.begin()); 102 } 103 104 105 if (!ForwardRefTypes.empty()) 106 return Error(ForwardRefTypes.begin()->second.second, 107 "use of undefined type named '" + 108 ForwardRefTypes.begin()->first + "'"); 109 if (!ForwardRefTypeIDs.empty()) 110 return Error(ForwardRefTypeIDs.begin()->second.second, 111 "use of undefined type '%" + 112 utostr(ForwardRefTypeIDs.begin()->first) + "'"); 113 114 if (!ForwardRefVals.empty()) 115 return Error(ForwardRefVals.begin()->second.second, 116 "use of undefined value '@" + ForwardRefVals.begin()->first + 117 "'"); 118 119 if (!ForwardRefValIDs.empty()) 120 return Error(ForwardRefValIDs.begin()->second.second, 121 "use of undefined value '@" + 122 utostr(ForwardRefValIDs.begin()->first) + "'"); 123 124 if (!ForwardRefMDNodes.empty()) 125 return Error(ForwardRefMDNodes.begin()->second.second, 126 "use of undefined metadata '!" + 127 utostr(ForwardRefMDNodes.begin()->first) + "'"); 128 129 130 // Look for intrinsic functions and CallInst that need to be upgraded 131 for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ) 132 UpgradeCallsToIntrinsic(FI++); // must be post-increment, as we remove 133 134 // Check debug info intrinsics. 135 CheckDebugInfoIntrinsics(M); 136 return false; 137} 138 139bool LLParser::ResolveForwardRefBlockAddresses(Function *TheFn, 140 std::vector<std::pair<ValID, GlobalValue*> > &Refs, 141 PerFunctionState *PFS) { 142 // Loop over all the references, resolving them. 143 for (unsigned i = 0, e = Refs.size(); i != e; ++i) { 144 BasicBlock *Res; 145 if (PFS) { 146 if (Refs[i].first.Kind == ValID::t_LocalName) 147 Res = PFS->GetBB(Refs[i].first.StrVal, Refs[i].first.Loc); 148 else 149 Res = PFS->GetBB(Refs[i].first.UIntVal, Refs[i].first.Loc); 150 } else if (Refs[i].first.Kind == ValID::t_LocalID) { 151 return Error(Refs[i].first.Loc, 152 "cannot take address of numeric label after the function is defined"); 153 } else { 154 Res = dyn_cast_or_null<BasicBlock>( 155 TheFn->getValueSymbolTable().lookup(Refs[i].first.StrVal)); 156 } 157 158 if (Res == 0) 159 return Error(Refs[i].first.Loc, 160 "referenced value is not a basic block"); 161 162 // Get the BlockAddress for this and update references to use it. 163 BlockAddress *BA = BlockAddress::get(TheFn, Res); 164 Refs[i].second->replaceAllUsesWith(BA); 165 Refs[i].second->eraseFromParent(); 166 } 167 return false; 168} 169 170 171//===----------------------------------------------------------------------===// 172// Top-Level Entities 173//===----------------------------------------------------------------------===// 174 175bool LLParser::ParseTopLevelEntities() { 176 while (1) { 177 switch (Lex.getKind()) { 178 default: return TokError("expected top-level entity"); 179 case lltok::Eof: return false; 180 //case lltok::kw_define: 181 case lltok::kw_declare: if (ParseDeclare()) return true; break; 182 case lltok::kw_define: if (ParseDefine()) return true; break; 183 case lltok::kw_module: if (ParseModuleAsm()) return true; break; 184 case lltok::kw_target: if (ParseTargetDefinition()) return true; break; 185 case lltok::kw_deplibs: if (ParseDepLibs()) return true; break; 186 case lltok::kw_type: if (ParseUnnamedType()) return true; break; 187 case lltok::LocalVarID: if (ParseUnnamedType()) return true; break; 188 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0 189 case lltok::LocalVar: if (ParseNamedType()) return true; break; 190 case lltok::GlobalID: if (ParseUnnamedGlobal()) return true; break; 191 case lltok::GlobalVar: if (ParseNamedGlobal()) return true; break; 192 case lltok::exclaim: if (ParseStandaloneMetadata()) return true; break; 193 case lltok::MetadataVar: if (ParseNamedMetadata()) return true; break; 194 195 // The Global variable production with no name can have many different 196 // optional leading prefixes, the production is: 197 // GlobalVar ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 198 // OptionalAddrSpace ('constant'|'global') ... 199 case lltok::kw_private : // OptionalLinkage 200 case lltok::kw_linker_private: // OptionalLinkage 201 case lltok::kw_internal: // OptionalLinkage 202 case lltok::kw_weak: // OptionalLinkage 203 case lltok::kw_weak_odr: // OptionalLinkage 204 case lltok::kw_linkonce: // OptionalLinkage 205 case lltok::kw_linkonce_odr: // OptionalLinkage 206 case lltok::kw_appending: // OptionalLinkage 207 case lltok::kw_dllexport: // OptionalLinkage 208 case lltok::kw_common: // OptionalLinkage 209 case lltok::kw_dllimport: // OptionalLinkage 210 case lltok::kw_extern_weak: // OptionalLinkage 211 case lltok::kw_external: { // OptionalLinkage 212 unsigned Linkage, Visibility; 213 if (ParseOptionalLinkage(Linkage) || 214 ParseOptionalVisibility(Visibility) || 215 ParseGlobal("", SMLoc(), Linkage, true, Visibility)) 216 return true; 217 break; 218 } 219 case lltok::kw_default: // OptionalVisibility 220 case lltok::kw_hidden: // OptionalVisibility 221 case lltok::kw_protected: { // OptionalVisibility 222 unsigned Visibility; 223 if (ParseOptionalVisibility(Visibility) || 224 ParseGlobal("", SMLoc(), 0, false, Visibility)) 225 return true; 226 break; 227 } 228 229 case lltok::kw_thread_local: // OptionalThreadLocal 230 case lltok::kw_addrspace: // OptionalAddrSpace 231 case lltok::kw_constant: // GlobalType 232 case lltok::kw_global: // GlobalType 233 if (ParseGlobal("", SMLoc(), 0, false, 0)) return true; 234 break; 235 } 236 } 237} 238 239 240/// toplevelentity 241/// ::= 'module' 'asm' STRINGCONSTANT 242bool LLParser::ParseModuleAsm() { 243 assert(Lex.getKind() == lltok::kw_module); 244 Lex.Lex(); 245 246 std::string AsmStr; 247 if (ParseToken(lltok::kw_asm, "expected 'module asm'") || 248 ParseStringConstant(AsmStr)) return true; 249 250 const std::string &AsmSoFar = M->getModuleInlineAsm(); 251 if (AsmSoFar.empty()) 252 M->setModuleInlineAsm(AsmStr); 253 else 254 M->setModuleInlineAsm(AsmSoFar+"\n"+AsmStr); 255 return false; 256} 257 258/// toplevelentity 259/// ::= 'target' 'triple' '=' STRINGCONSTANT 260/// ::= 'target' 'datalayout' '=' STRINGCONSTANT 261bool LLParser::ParseTargetDefinition() { 262 assert(Lex.getKind() == lltok::kw_target); 263 std::string Str; 264 switch (Lex.Lex()) { 265 default: return TokError("unknown target property"); 266 case lltok::kw_triple: 267 Lex.Lex(); 268 if (ParseToken(lltok::equal, "expected '=' after target triple") || 269 ParseStringConstant(Str)) 270 return true; 271 M->setTargetTriple(Str); 272 return false; 273 case lltok::kw_datalayout: 274 Lex.Lex(); 275 if (ParseToken(lltok::equal, "expected '=' after target datalayout") || 276 ParseStringConstant(Str)) 277 return true; 278 M->setDataLayout(Str); 279 return false; 280 } 281} 282 283/// toplevelentity 284/// ::= 'deplibs' '=' '[' ']' 285/// ::= 'deplibs' '=' '[' STRINGCONSTANT (',' STRINGCONSTANT)* ']' 286bool LLParser::ParseDepLibs() { 287 assert(Lex.getKind() == lltok::kw_deplibs); 288 Lex.Lex(); 289 if (ParseToken(lltok::equal, "expected '=' after deplibs") || 290 ParseToken(lltok::lsquare, "expected '=' after deplibs")) 291 return true; 292 293 if (EatIfPresent(lltok::rsquare)) 294 return false; 295 296 std::string Str; 297 if (ParseStringConstant(Str)) return true; 298 M->addLibrary(Str); 299 300 while (EatIfPresent(lltok::comma)) { 301 if (ParseStringConstant(Str)) return true; 302 M->addLibrary(Str); 303 } 304 305 return ParseToken(lltok::rsquare, "expected ']' at end of list"); 306} 307 308/// ParseUnnamedType: 309/// ::= 'type' type 310/// ::= LocalVarID '=' 'type' type 311bool LLParser::ParseUnnamedType() { 312 unsigned TypeID = NumberedTypes.size(); 313 314 // Handle the LocalVarID form. 315 if (Lex.getKind() == lltok::LocalVarID) { 316 if (Lex.getUIntVal() != TypeID) 317 return Error(Lex.getLoc(), "type expected to be numbered '%" + 318 utostr(TypeID) + "'"); 319 Lex.Lex(); // eat LocalVarID; 320 321 if (ParseToken(lltok::equal, "expected '=' after name")) 322 return true; 323 } 324 325 LocTy TypeLoc = Lex.getLoc(); 326 if (ParseToken(lltok::kw_type, "expected 'type' after '='")) return true; 327 328 PATypeHolder Ty(Type::getVoidTy(Context)); 329 if (ParseType(Ty)) return true; 330 331 // See if this type was previously referenced. 332 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 333 FI = ForwardRefTypeIDs.find(TypeID); 334 if (FI != ForwardRefTypeIDs.end()) { 335 if (FI->second.first.get() == Ty) 336 return Error(TypeLoc, "self referential type is invalid"); 337 338 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 339 Ty = FI->second.first.get(); 340 ForwardRefTypeIDs.erase(FI); 341 } 342 343 NumberedTypes.push_back(Ty); 344 345 return false; 346} 347 348/// toplevelentity 349/// ::= LocalVar '=' 'type' type 350bool LLParser::ParseNamedType() { 351 std::string Name = Lex.getStrVal(); 352 LocTy NameLoc = Lex.getLoc(); 353 Lex.Lex(); // eat LocalVar. 354 355 PATypeHolder Ty(Type::getVoidTy(Context)); 356 357 if (ParseToken(lltok::equal, "expected '=' after name") || 358 ParseToken(lltok::kw_type, "expected 'type' after name") || 359 ParseType(Ty)) 360 return true; 361 362 // Set the type name, checking for conflicts as we do so. 363 bool AlreadyExists = M->addTypeName(Name, Ty); 364 if (!AlreadyExists) return false; 365 366 // See if this type is a forward reference. We need to eagerly resolve 367 // types to allow recursive type redefinitions below. 368 std::map<std::string, std::pair<PATypeHolder, LocTy> >::iterator 369 FI = ForwardRefTypes.find(Name); 370 if (FI != ForwardRefTypes.end()) { 371 if (FI->second.first.get() == Ty) 372 return Error(NameLoc, "self referential type is invalid"); 373 374 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 375 Ty = FI->second.first.get(); 376 ForwardRefTypes.erase(FI); 377 } 378 379 // Inserting a name that is already defined, get the existing name. 380 const Type *Existing = M->getTypeByName(Name); 381 assert(Existing && "Conflict but no matching type?!"); 382 383 // Otherwise, this is an attempt to redefine a type. That's okay if 384 // the redefinition is identical to the original. 385 // FIXME: REMOVE REDEFINITIONS IN LLVM 3.0 386 if (Existing == Ty) return false; 387 388 // Any other kind of (non-equivalent) redefinition is an error. 389 return Error(NameLoc, "redefinition of type named '" + Name + "' of type '" + 390 Ty->getDescription() + "'"); 391} 392 393 394/// toplevelentity 395/// ::= 'declare' FunctionHeader 396bool LLParser::ParseDeclare() { 397 assert(Lex.getKind() == lltok::kw_declare); 398 Lex.Lex(); 399 400 Function *F; 401 return ParseFunctionHeader(F, false); 402} 403 404/// toplevelentity 405/// ::= 'define' FunctionHeader '{' ... 406bool LLParser::ParseDefine() { 407 assert(Lex.getKind() == lltok::kw_define); 408 Lex.Lex(); 409 410 Function *F; 411 return ParseFunctionHeader(F, true) || 412 ParseFunctionBody(*F); 413} 414 415/// ParseGlobalType 416/// ::= 'constant' 417/// ::= 'global' 418bool LLParser::ParseGlobalType(bool &IsConstant) { 419 if (Lex.getKind() == lltok::kw_constant) 420 IsConstant = true; 421 else if (Lex.getKind() == lltok::kw_global) 422 IsConstant = false; 423 else { 424 IsConstant = false; 425 return TokError("expected 'global' or 'constant'"); 426 } 427 Lex.Lex(); 428 return false; 429} 430 431/// ParseUnnamedGlobal: 432/// OptionalVisibility ALIAS ... 433/// OptionalLinkage OptionalVisibility ... -> global variable 434/// GlobalID '=' OptionalVisibility ALIAS ... 435/// GlobalID '=' OptionalLinkage OptionalVisibility ... -> global variable 436bool LLParser::ParseUnnamedGlobal() { 437 unsigned VarID = NumberedVals.size(); 438 std::string Name; 439 LocTy NameLoc = Lex.getLoc(); 440 441 // Handle the GlobalID form. 442 if (Lex.getKind() == lltok::GlobalID) { 443 if (Lex.getUIntVal() != VarID) 444 return Error(Lex.getLoc(), "variable expected to be numbered '%" + 445 utostr(VarID) + "'"); 446 Lex.Lex(); // eat GlobalID; 447 448 if (ParseToken(lltok::equal, "expected '=' after name")) 449 return true; 450 } 451 452 bool HasLinkage; 453 unsigned Linkage, Visibility; 454 if (ParseOptionalLinkage(Linkage, HasLinkage) || 455 ParseOptionalVisibility(Visibility)) 456 return true; 457 458 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 459 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 460 return ParseAlias(Name, NameLoc, Visibility); 461} 462 463/// ParseNamedGlobal: 464/// GlobalVar '=' OptionalVisibility ALIAS ... 465/// GlobalVar '=' OptionalLinkage OptionalVisibility ... -> global variable 466bool LLParser::ParseNamedGlobal() { 467 assert(Lex.getKind() == lltok::GlobalVar); 468 LocTy NameLoc = Lex.getLoc(); 469 std::string Name = Lex.getStrVal(); 470 Lex.Lex(); 471 472 bool HasLinkage; 473 unsigned Linkage, Visibility; 474 if (ParseToken(lltok::equal, "expected '=' in global variable") || 475 ParseOptionalLinkage(Linkage, HasLinkage) || 476 ParseOptionalVisibility(Visibility)) 477 return true; 478 479 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 480 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 481 return ParseAlias(Name, NameLoc, Visibility); 482} 483 484// MDString: 485// ::= '!' STRINGCONSTANT 486bool LLParser::ParseMDString(MDString *&Result) { 487 std::string Str; 488 if (ParseStringConstant(Str)) return true; 489 Result = MDString::get(Context, Str); 490 return false; 491} 492 493// MDNode: 494// ::= '!' MDNodeNumber 495// 496/// This version of ParseMDNodeID returns the slot number and null in the case 497/// of a forward reference. 498bool LLParser::ParseMDNodeID(MDNode *&Result, unsigned &SlotNo) { 499 // !{ ..., !42, ... } 500 if (ParseUInt32(SlotNo)) return true; 501 502 // Check existing MDNode. 503 if (SlotNo < NumberedMetadata.size() && NumberedMetadata[SlotNo] != 0) 504 Result = NumberedMetadata[SlotNo]; 505 else 506 Result = 0; 507 return false; 508} 509 510bool LLParser::ParseMDNodeID(MDNode *&Result) { 511 // !{ ..., !42, ... } 512 unsigned MID = 0; 513 if (ParseMDNodeID(Result, MID)) return true; 514 515 // If not a forward reference, just return it now. 516 if (Result) return false; 517 518 // Otherwise, create MDNode forward reference. 519 520 // FIXME: This is not unique enough! 521 std::string FwdRefName = "llvm.mdnode.fwdref." + utostr(MID); 522 Value *V = MDString::get(Context, FwdRefName); 523 MDNode *FwdNode = MDNode::get(Context, &V, 1); 524 ForwardRefMDNodes[MID] = std::make_pair(FwdNode, Lex.getLoc()); 525 526 if (NumberedMetadata.size() <= MID) 527 NumberedMetadata.resize(MID+1); 528 NumberedMetadata[MID] = FwdNode; 529 Result = FwdNode; 530 return false; 531} 532 533/// ParseNamedMetadata: 534/// !foo = !{ !1, !2 } 535bool LLParser::ParseNamedMetadata() { 536 assert(Lex.getKind() == lltok::MetadataVar); 537 std::string Name = Lex.getStrVal(); 538 Lex.Lex(); 539 540 if (ParseToken(lltok::equal, "expected '=' here") || 541 ParseToken(lltok::exclaim, "Expected '!' here") || 542 ParseToken(lltok::lbrace, "Expected '{' here")) 543 return true; 544 545 SmallVector<MDNode *, 8> Elts; 546 do { 547 // Null is a special case since it is typeless. 548 if (EatIfPresent(lltok::kw_null)) { 549 Elts.push_back(0); 550 continue; 551 } 552 553 if (ParseToken(lltok::exclaim, "Expected '!' here")) 554 return true; 555 556 MDNode *N = 0; 557 if (ParseMDNodeID(N)) return true; 558 Elts.push_back(N); 559 } while (EatIfPresent(lltok::comma)); 560 561 if (ParseToken(lltok::rbrace, "expected end of metadata node")) 562 return true; 563 564 NamedMDNode::Create(Context, Name, Elts.data(), Elts.size(), M); 565 return false; 566} 567 568/// ParseStandaloneMetadata: 569/// !42 = !{...} 570bool LLParser::ParseStandaloneMetadata() { 571 assert(Lex.getKind() == lltok::exclaim); 572 Lex.Lex(); 573 unsigned MetadataID = 0; 574 575 LocTy TyLoc; 576 PATypeHolder Ty(Type::getVoidTy(Context)); 577 SmallVector<Value *, 16> Elts; 578 if (ParseUInt32(MetadataID) || 579 ParseToken(lltok::equal, "expected '=' here") || 580 ParseType(Ty, TyLoc) || 581 ParseToken(lltok::exclaim, "Expected '!' here") || 582 ParseToken(lltok::lbrace, "Expected '{' here") || 583 ParseMDNodeVector(Elts, NULL) || 584 ParseToken(lltok::rbrace, "expected end of metadata node")) 585 return true; 586 587 MDNode *Init = MDNode::get(Context, Elts.data(), Elts.size()); 588 589 // See if this was forward referenced, if so, handle it. 590 std::map<unsigned, std::pair<TrackingVH<MDNode>, LocTy> >::iterator 591 FI = ForwardRefMDNodes.find(MetadataID); 592 if (FI != ForwardRefMDNodes.end()) { 593 FI->second.first->replaceAllUsesWith(Init); 594 ForwardRefMDNodes.erase(FI); 595 596 assert(NumberedMetadata[MetadataID] == Init && "Tracking VH didn't work"); 597 } else { 598 if (MetadataID >= NumberedMetadata.size()) 599 NumberedMetadata.resize(MetadataID+1); 600 601 if (NumberedMetadata[MetadataID] != 0) 602 return TokError("Metadata id is already used"); 603 NumberedMetadata[MetadataID] = Init; 604 } 605 606 return false; 607} 608 609/// ParseAlias: 610/// ::= GlobalVar '=' OptionalVisibility 'alias' OptionalLinkage Aliasee 611/// Aliasee 612/// ::= TypeAndValue 613/// ::= 'bitcast' '(' TypeAndValue 'to' Type ')' 614/// ::= 'getelementptr' 'inbounds'? '(' ... ')' 615/// 616/// Everything through visibility has already been parsed. 617/// 618bool LLParser::ParseAlias(const std::string &Name, LocTy NameLoc, 619 unsigned Visibility) { 620 assert(Lex.getKind() == lltok::kw_alias); 621 Lex.Lex(); 622 unsigned Linkage; 623 LocTy LinkageLoc = Lex.getLoc(); 624 if (ParseOptionalLinkage(Linkage)) 625 return true; 626 627 if (Linkage != GlobalValue::ExternalLinkage && 628 Linkage != GlobalValue::WeakAnyLinkage && 629 Linkage != GlobalValue::WeakODRLinkage && 630 Linkage != GlobalValue::InternalLinkage && 631 Linkage != GlobalValue::PrivateLinkage && 632 Linkage != GlobalValue::LinkerPrivateLinkage) 633 return Error(LinkageLoc, "invalid linkage type for alias"); 634 635 Constant *Aliasee; 636 LocTy AliaseeLoc = Lex.getLoc(); 637 if (Lex.getKind() != lltok::kw_bitcast && 638 Lex.getKind() != lltok::kw_getelementptr) { 639 if (ParseGlobalTypeAndValue(Aliasee)) return true; 640 } else { 641 // The bitcast dest type is not present, it is implied by the dest type. 642 ValID ID; 643 if (ParseValID(ID)) return true; 644 if (ID.Kind != ValID::t_Constant) 645 return Error(AliaseeLoc, "invalid aliasee"); 646 Aliasee = ID.ConstantVal; 647 } 648 649 if (!Aliasee->getType()->isPointerTy()) 650 return Error(AliaseeLoc, "alias must have pointer type"); 651 652 // Okay, create the alias but do not insert it into the module yet. 653 GlobalAlias* GA = new GlobalAlias(Aliasee->getType(), 654 (GlobalValue::LinkageTypes)Linkage, Name, 655 Aliasee); 656 GA->setVisibility((GlobalValue::VisibilityTypes)Visibility); 657 658 // See if this value already exists in the symbol table. If so, it is either 659 // a redefinition or a definition of a forward reference. 660 if (GlobalValue *Val = M->getNamedValue(Name)) { 661 // See if this was a redefinition. If so, there is no entry in 662 // ForwardRefVals. 663 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 664 I = ForwardRefVals.find(Name); 665 if (I == ForwardRefVals.end()) 666 return Error(NameLoc, "redefinition of global named '@" + Name + "'"); 667 668 // Otherwise, this was a definition of forward ref. Verify that types 669 // agree. 670 if (Val->getType() != GA->getType()) 671 return Error(NameLoc, 672 "forward reference and definition of alias have different types"); 673 674 // If they agree, just RAUW the old value with the alias and remove the 675 // forward ref info. 676 Val->replaceAllUsesWith(GA); 677 Val->eraseFromParent(); 678 ForwardRefVals.erase(I); 679 } 680 681 // Insert into the module, we know its name won't collide now. 682 M->getAliasList().push_back(GA); 683 assert(GA->getNameStr() == Name && "Should not be a name conflict!"); 684 685 return false; 686} 687 688/// ParseGlobal 689/// ::= GlobalVar '=' OptionalLinkage OptionalVisibility OptionalThreadLocal 690/// OptionalAddrSpace GlobalType Type Const 691/// ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 692/// OptionalAddrSpace GlobalType Type Const 693/// 694/// Everything through visibility has been parsed already. 695/// 696bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc, 697 unsigned Linkage, bool HasLinkage, 698 unsigned Visibility) { 699 unsigned AddrSpace; 700 bool ThreadLocal, IsConstant; 701 LocTy TyLoc; 702 703 PATypeHolder Ty(Type::getVoidTy(Context)); 704 if (ParseOptionalToken(lltok::kw_thread_local, ThreadLocal) || 705 ParseOptionalAddrSpace(AddrSpace) || 706 ParseGlobalType(IsConstant) || 707 ParseType(Ty, TyLoc)) 708 return true; 709 710 // If the linkage is specified and is external, then no initializer is 711 // present. 712 Constant *Init = 0; 713 if (!HasLinkage || (Linkage != GlobalValue::DLLImportLinkage && 714 Linkage != GlobalValue::ExternalWeakLinkage && 715 Linkage != GlobalValue::ExternalLinkage)) { 716 if (ParseGlobalValue(Ty, Init)) 717 return true; 718 } 719 720 if (Ty->isFunctionTy() || Ty->isLabelTy()) 721 return Error(TyLoc, "invalid type for global variable"); 722 723 GlobalVariable *GV = 0; 724 725 // See if the global was forward referenced, if so, use the global. 726 if (!Name.empty()) { 727 if (GlobalValue *GVal = M->getNamedValue(Name)) { 728 if (!ForwardRefVals.erase(Name) || !isa<GlobalValue>(GVal)) 729 return Error(NameLoc, "redefinition of global '@" + Name + "'"); 730 GV = cast<GlobalVariable>(GVal); 731 } 732 } else { 733 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 734 I = ForwardRefValIDs.find(NumberedVals.size()); 735 if (I != ForwardRefValIDs.end()) { 736 GV = cast<GlobalVariable>(I->second.first); 737 ForwardRefValIDs.erase(I); 738 } 739 } 740 741 if (GV == 0) { 742 GV = new GlobalVariable(*M, Ty, false, GlobalValue::ExternalLinkage, 0, 743 Name, 0, false, AddrSpace); 744 } else { 745 if (GV->getType()->getElementType() != Ty) 746 return Error(TyLoc, 747 "forward reference and definition of global have different types"); 748 749 // Move the forward-reference to the correct spot in the module. 750 M->getGlobalList().splice(M->global_end(), M->getGlobalList(), GV); 751 } 752 753 if (Name.empty()) 754 NumberedVals.push_back(GV); 755 756 // Set the parsed properties on the global. 757 if (Init) 758 GV->setInitializer(Init); 759 GV->setConstant(IsConstant); 760 GV->setLinkage((GlobalValue::LinkageTypes)Linkage); 761 GV->setVisibility((GlobalValue::VisibilityTypes)Visibility); 762 GV->setThreadLocal(ThreadLocal); 763 764 // Parse attributes on the global. 765 while (Lex.getKind() == lltok::comma) { 766 Lex.Lex(); 767 768 if (Lex.getKind() == lltok::kw_section) { 769 Lex.Lex(); 770 GV->setSection(Lex.getStrVal()); 771 if (ParseToken(lltok::StringConstant, "expected global section string")) 772 return true; 773 } else if (Lex.getKind() == lltok::kw_align) { 774 unsigned Alignment; 775 if (ParseOptionalAlignment(Alignment)) return true; 776 GV->setAlignment(Alignment); 777 } else { 778 TokError("unknown global variable property!"); 779 } 780 } 781 782 return false; 783} 784 785 786//===----------------------------------------------------------------------===// 787// GlobalValue Reference/Resolution Routines. 788//===----------------------------------------------------------------------===// 789 790/// GetGlobalVal - Get a value with the specified name or ID, creating a 791/// forward reference record if needed. This can return null if the value 792/// exists but does not have the right type. 793GlobalValue *LLParser::GetGlobalVal(const std::string &Name, const Type *Ty, 794 LocTy Loc) { 795 const PointerType *PTy = dyn_cast<PointerType>(Ty); 796 if (PTy == 0) { 797 Error(Loc, "global variable reference must have pointer type"); 798 return 0; 799 } 800 801 // Look this name up in the normal function symbol table. 802 GlobalValue *Val = 803 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name)); 804 805 // If this is a forward reference for the value, see if we already created a 806 // forward ref record. 807 if (Val == 0) { 808 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 809 I = ForwardRefVals.find(Name); 810 if (I != ForwardRefVals.end()) 811 Val = I->second.first; 812 } 813 814 // If we have the value in the symbol table or fwd-ref table, return it. 815 if (Val) { 816 if (Val->getType() == Ty) return Val; 817 Error(Loc, "'@" + Name + "' defined with type '" + 818 Val->getType()->getDescription() + "'"); 819 return 0; 820 } 821 822 // Otherwise, create a new forward reference for this value and remember it. 823 GlobalValue *FwdVal; 824 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 825 // Function types can return opaque but functions can't. 826 if (FT->getReturnType()->isOpaqueTy()) { 827 Error(Loc, "function may not return opaque type"); 828 return 0; 829 } 830 831 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M); 832 } else { 833 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 834 GlobalValue::ExternalWeakLinkage, 0, Name); 835 } 836 837 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 838 return FwdVal; 839} 840 841GlobalValue *LLParser::GetGlobalVal(unsigned ID, const Type *Ty, LocTy Loc) { 842 const PointerType *PTy = dyn_cast<PointerType>(Ty); 843 if (PTy == 0) { 844 Error(Loc, "global variable reference must have pointer type"); 845 return 0; 846 } 847 848 GlobalValue *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 849 850 // If this is a forward reference for the value, see if we already created a 851 // forward ref record. 852 if (Val == 0) { 853 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 854 I = ForwardRefValIDs.find(ID); 855 if (I != ForwardRefValIDs.end()) 856 Val = I->second.first; 857 } 858 859 // If we have the value in the symbol table or fwd-ref table, return it. 860 if (Val) { 861 if (Val->getType() == Ty) return Val; 862 Error(Loc, "'@" + utostr(ID) + "' defined with type '" + 863 Val->getType()->getDescription() + "'"); 864 return 0; 865 } 866 867 // Otherwise, create a new forward reference for this value and remember it. 868 GlobalValue *FwdVal; 869 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 870 // Function types can return opaque but functions can't. 871 if (FT->getReturnType()->isOpaqueTy()) { 872 Error(Loc, "function may not return opaque type"); 873 return 0; 874 } 875 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, "", M); 876 } else { 877 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 878 GlobalValue::ExternalWeakLinkage, 0, ""); 879 } 880 881 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 882 return FwdVal; 883} 884 885 886//===----------------------------------------------------------------------===// 887// Helper Routines. 888//===----------------------------------------------------------------------===// 889 890/// ParseToken - If the current token has the specified kind, eat it and return 891/// success. Otherwise, emit the specified error and return failure. 892bool LLParser::ParseToken(lltok::Kind T, const char *ErrMsg) { 893 if (Lex.getKind() != T) 894 return TokError(ErrMsg); 895 Lex.Lex(); 896 return false; 897} 898 899/// ParseStringConstant 900/// ::= StringConstant 901bool LLParser::ParseStringConstant(std::string &Result) { 902 if (Lex.getKind() != lltok::StringConstant) 903 return TokError("expected string constant"); 904 Result = Lex.getStrVal(); 905 Lex.Lex(); 906 return false; 907} 908 909/// ParseUInt32 910/// ::= uint32 911bool LLParser::ParseUInt32(unsigned &Val) { 912 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned()) 913 return TokError("expected integer"); 914 uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(0xFFFFFFFFULL+1); 915 if (Val64 != unsigned(Val64)) 916 return TokError("expected 32-bit integer (too large)"); 917 Val = Val64; 918 Lex.Lex(); 919 return false; 920} 921 922 923/// ParseOptionalAddrSpace 924/// := /*empty*/ 925/// := 'addrspace' '(' uint32 ')' 926bool LLParser::ParseOptionalAddrSpace(unsigned &AddrSpace) { 927 AddrSpace = 0; 928 if (!EatIfPresent(lltok::kw_addrspace)) 929 return false; 930 return ParseToken(lltok::lparen, "expected '(' in address space") || 931 ParseUInt32(AddrSpace) || 932 ParseToken(lltok::rparen, "expected ')' in address space"); 933} 934 935/// ParseOptionalAttrs - Parse a potentially empty attribute list. AttrKind 936/// indicates what kind of attribute list this is: 0: function arg, 1: result, 937/// 2: function attr. 938/// 3: function arg after value: FIXME: REMOVE IN LLVM 3.0 939bool LLParser::ParseOptionalAttrs(unsigned &Attrs, unsigned AttrKind) { 940 Attrs = Attribute::None; 941 LocTy AttrLoc = Lex.getLoc(); 942 943 while (1) { 944 switch (Lex.getKind()) { 945 case lltok::kw_sext: 946 case lltok::kw_zext: 947 // Treat these as signext/zeroext if they occur in the argument list after 948 // the value, as in "call i8 @foo(i8 10 sext)". If they occur before the 949 // value, as in "call i8 @foo(i8 sext (" then it is part of a constant 950 // expr. 951 // FIXME: REMOVE THIS IN LLVM 3.0 952 if (AttrKind == 3) { 953 if (Lex.getKind() == lltok::kw_sext) 954 Attrs |= Attribute::SExt; 955 else 956 Attrs |= Attribute::ZExt; 957 break; 958 } 959 // FALL THROUGH. 960 default: // End of attributes. 961 if (AttrKind != 2 && (Attrs & Attribute::FunctionOnly)) 962 return Error(AttrLoc, "invalid use of function-only attribute"); 963 964 if (AttrKind != 0 && AttrKind != 3 && (Attrs & Attribute::ParameterOnly)) 965 return Error(AttrLoc, "invalid use of parameter-only attribute"); 966 967 return false; 968 case lltok::kw_zeroext: Attrs |= Attribute::ZExt; break; 969 case lltok::kw_signext: Attrs |= Attribute::SExt; break; 970 case lltok::kw_inreg: Attrs |= Attribute::InReg; break; 971 case lltok::kw_sret: Attrs |= Attribute::StructRet; break; 972 case lltok::kw_noalias: Attrs |= Attribute::NoAlias; break; 973 case lltok::kw_nocapture: Attrs |= Attribute::NoCapture; break; 974 case lltok::kw_byval: Attrs |= Attribute::ByVal; break; 975 case lltok::kw_nest: Attrs |= Attribute::Nest; break; 976 977 case lltok::kw_noreturn: Attrs |= Attribute::NoReturn; break; 978 case lltok::kw_nounwind: Attrs |= Attribute::NoUnwind; break; 979 case lltok::kw_noinline: Attrs |= Attribute::NoInline; break; 980 case lltok::kw_readnone: Attrs |= Attribute::ReadNone; break; 981 case lltok::kw_readonly: Attrs |= Attribute::ReadOnly; break; 982 case lltok::kw_inlinehint: Attrs |= Attribute::InlineHint; break; 983 case lltok::kw_alwaysinline: Attrs |= Attribute::AlwaysInline; break; 984 case lltok::kw_optsize: Attrs |= Attribute::OptimizeForSize; break; 985 case lltok::kw_ssp: Attrs |= Attribute::StackProtect; break; 986 case lltok::kw_sspreq: Attrs |= Attribute::StackProtectReq; break; 987 case lltok::kw_noredzone: Attrs |= Attribute::NoRedZone; break; 988 case lltok::kw_noimplicitfloat: Attrs |= Attribute::NoImplicitFloat; break; 989 case lltok::kw_naked: Attrs |= Attribute::Naked; break; 990 991 case lltok::kw_alignstack: { 992 unsigned Alignment; 993 if (ParseOptionalStackAlignment(Alignment)) 994 return true; 995 Attrs |= Attribute::constructStackAlignmentFromInt(Alignment); 996 continue; 997 } 998 999 case lltok::kw_align: { 1000 unsigned Alignment; 1001 if (ParseOptionalAlignment(Alignment)) 1002 return true; 1003 Attrs |= Attribute::constructAlignmentFromInt(Alignment); 1004 continue; 1005 } 1006 1007 } 1008 Lex.Lex(); 1009 } 1010} 1011 1012/// ParseOptionalLinkage 1013/// ::= /*empty*/ 1014/// ::= 'private' 1015/// ::= 'linker_private' 1016/// ::= 'internal' 1017/// ::= 'weak' 1018/// ::= 'weak_odr' 1019/// ::= 'linkonce' 1020/// ::= 'linkonce_odr' 1021/// ::= 'appending' 1022/// ::= 'dllexport' 1023/// ::= 'common' 1024/// ::= 'dllimport' 1025/// ::= 'extern_weak' 1026/// ::= 'external' 1027bool LLParser::ParseOptionalLinkage(unsigned &Res, bool &HasLinkage) { 1028 HasLinkage = false; 1029 switch (Lex.getKind()) { 1030 default: Res=GlobalValue::ExternalLinkage; return false; 1031 case lltok::kw_private: Res = GlobalValue::PrivateLinkage; break; 1032 case lltok::kw_linker_private: Res = GlobalValue::LinkerPrivateLinkage; break; 1033 case lltok::kw_internal: Res = GlobalValue::InternalLinkage; break; 1034 case lltok::kw_weak: Res = GlobalValue::WeakAnyLinkage; break; 1035 case lltok::kw_weak_odr: Res = GlobalValue::WeakODRLinkage; break; 1036 case lltok::kw_linkonce: Res = GlobalValue::LinkOnceAnyLinkage; break; 1037 case lltok::kw_linkonce_odr: Res = GlobalValue::LinkOnceODRLinkage; break; 1038 case lltok::kw_available_externally: 1039 Res = GlobalValue::AvailableExternallyLinkage; 1040 break; 1041 case lltok::kw_appending: Res = GlobalValue::AppendingLinkage; break; 1042 case lltok::kw_dllexport: Res = GlobalValue::DLLExportLinkage; break; 1043 case lltok::kw_common: Res = GlobalValue::CommonLinkage; break; 1044 case lltok::kw_dllimport: Res = GlobalValue::DLLImportLinkage; break; 1045 case lltok::kw_extern_weak: Res = GlobalValue::ExternalWeakLinkage; break; 1046 case lltok::kw_external: Res = GlobalValue::ExternalLinkage; break; 1047 } 1048 Lex.Lex(); 1049 HasLinkage = true; 1050 return false; 1051} 1052 1053/// ParseOptionalVisibility 1054/// ::= /*empty*/ 1055/// ::= 'default' 1056/// ::= 'hidden' 1057/// ::= 'protected' 1058/// 1059bool LLParser::ParseOptionalVisibility(unsigned &Res) { 1060 switch (Lex.getKind()) { 1061 default: Res = GlobalValue::DefaultVisibility; return false; 1062 case lltok::kw_default: Res = GlobalValue::DefaultVisibility; break; 1063 case lltok::kw_hidden: Res = GlobalValue::HiddenVisibility; break; 1064 case lltok::kw_protected: Res = GlobalValue::ProtectedVisibility; break; 1065 } 1066 Lex.Lex(); 1067 return false; 1068} 1069 1070/// ParseOptionalCallingConv 1071/// ::= /*empty*/ 1072/// ::= 'ccc' 1073/// ::= 'fastcc' 1074/// ::= 'coldcc' 1075/// ::= 'x86_stdcallcc' 1076/// ::= 'x86_fastcallcc' 1077/// ::= 'arm_apcscc' 1078/// ::= 'arm_aapcscc' 1079/// ::= 'arm_aapcs_vfpcc' 1080/// ::= 'msp430_intrcc' 1081/// ::= 'cc' UINT 1082/// 1083bool LLParser::ParseOptionalCallingConv(CallingConv::ID &CC) { 1084 switch (Lex.getKind()) { 1085 default: CC = CallingConv::C; return false; 1086 case lltok::kw_ccc: CC = CallingConv::C; break; 1087 case lltok::kw_fastcc: CC = CallingConv::Fast; break; 1088 case lltok::kw_coldcc: CC = CallingConv::Cold; break; 1089 case lltok::kw_x86_stdcallcc: CC = CallingConv::X86_StdCall; break; 1090 case lltok::kw_x86_fastcallcc: CC = CallingConv::X86_FastCall; break; 1091 case lltok::kw_arm_apcscc: CC = CallingConv::ARM_APCS; break; 1092 case lltok::kw_arm_aapcscc: CC = CallingConv::ARM_AAPCS; break; 1093 case lltok::kw_arm_aapcs_vfpcc:CC = CallingConv::ARM_AAPCS_VFP; break; 1094 case lltok::kw_msp430_intrcc: CC = CallingConv::MSP430_INTR; break; 1095 case lltok::kw_cc: { 1096 unsigned ArbitraryCC; 1097 Lex.Lex(); 1098 if (ParseUInt32(ArbitraryCC)) { 1099 return true; 1100 } else 1101 CC = static_cast<CallingConv::ID>(ArbitraryCC); 1102 return false; 1103 } 1104 break; 1105 } 1106 1107 Lex.Lex(); 1108 return false; 1109} 1110 1111/// ParseInstructionMetadata 1112/// ::= !dbg !42 (',' !dbg !57)* 1113bool LLParser::ParseInstructionMetadata(Instruction *Inst) { 1114 do { 1115 if (Lex.getKind() != lltok::MetadataVar) 1116 return TokError("expected metadata after comma"); 1117 1118 std::string Name = Lex.getStrVal(); 1119 Lex.Lex(); 1120 1121 MDNode *Node; 1122 unsigned NodeID; 1123 SMLoc Loc = Lex.getLoc(); 1124 if (ParseToken(lltok::exclaim, "expected '!' here") || 1125 ParseMDNodeID(Node, NodeID)) 1126 return true; 1127 1128 unsigned MDK = M->getMDKindID(Name.c_str()); 1129 if (Node) { 1130 // If we got the node, add it to the instruction. 1131 Inst->setMetadata(MDK, Node); 1132 } else { 1133 MDRef R = { Loc, MDK, NodeID }; 1134 // Otherwise, remember that this should be resolved later. 1135 ForwardRefInstMetadata[Inst].push_back(R); 1136 } 1137 1138 // If this is the end of the list, we're done. 1139 } while (EatIfPresent(lltok::comma)); 1140 return false; 1141} 1142 1143/// ParseOptionalAlignment 1144/// ::= /* empty */ 1145/// ::= 'align' 4 1146bool LLParser::ParseOptionalAlignment(unsigned &Alignment) { 1147 Alignment = 0; 1148 if (!EatIfPresent(lltok::kw_align)) 1149 return false; 1150 LocTy AlignLoc = Lex.getLoc(); 1151 if (ParseUInt32(Alignment)) return true; 1152 if (!isPowerOf2_32(Alignment)) 1153 return Error(AlignLoc, "alignment is not a power of two"); 1154 return false; 1155} 1156 1157/// ParseOptionalCommaAlign 1158/// ::= 1159/// ::= ',' align 4 1160/// 1161/// This returns with AteExtraComma set to true if it ate an excess comma at the 1162/// end. 1163bool LLParser::ParseOptionalCommaAlign(unsigned &Alignment, 1164 bool &AteExtraComma) { 1165 AteExtraComma = false; 1166 while (EatIfPresent(lltok::comma)) { 1167 // Metadata at the end is an early exit. 1168 if (Lex.getKind() == lltok::MetadataVar) { 1169 AteExtraComma = true; 1170 return false; 1171 } 1172 1173 if (Lex.getKind() == lltok::kw_align) { 1174 if (ParseOptionalAlignment(Alignment)) return true; 1175 } else 1176 return true; 1177 } 1178 1179 return false; 1180} 1181 1182/// ParseOptionalStackAlignment 1183/// ::= /* empty */ 1184/// ::= 'alignstack' '(' 4 ')' 1185bool LLParser::ParseOptionalStackAlignment(unsigned &Alignment) { 1186 Alignment = 0; 1187 if (!EatIfPresent(lltok::kw_alignstack)) 1188 return false; 1189 LocTy ParenLoc = Lex.getLoc(); 1190 if (!EatIfPresent(lltok::lparen)) 1191 return Error(ParenLoc, "expected '('"); 1192 LocTy AlignLoc = Lex.getLoc(); 1193 if (ParseUInt32(Alignment)) return true; 1194 ParenLoc = Lex.getLoc(); 1195 if (!EatIfPresent(lltok::rparen)) 1196 return Error(ParenLoc, "expected ')'"); 1197 if (!isPowerOf2_32(Alignment)) 1198 return Error(AlignLoc, "stack alignment is not a power of two"); 1199 return false; 1200} 1201 1202/// ParseIndexList - This parses the index list for an insert/extractvalue 1203/// instruction. This sets AteExtraComma in the case where we eat an extra 1204/// comma at the end of the line and find that it is followed by metadata. 1205/// Clients that don't allow metadata can call the version of this function that 1206/// only takes one argument. 1207/// 1208/// ParseIndexList 1209/// ::= (',' uint32)+ 1210/// 1211bool LLParser::ParseIndexList(SmallVectorImpl<unsigned> &Indices, 1212 bool &AteExtraComma) { 1213 AteExtraComma = false; 1214 1215 if (Lex.getKind() != lltok::comma) 1216 return TokError("expected ',' as start of index list"); 1217 1218 while (EatIfPresent(lltok::comma)) { 1219 if (Lex.getKind() == lltok::MetadataVar) { 1220 AteExtraComma = true; 1221 return false; 1222 } 1223 unsigned Idx; 1224 if (ParseUInt32(Idx)) return true; 1225 Indices.push_back(Idx); 1226 } 1227 1228 return false; 1229} 1230 1231//===----------------------------------------------------------------------===// 1232// Type Parsing. 1233//===----------------------------------------------------------------------===// 1234 1235/// ParseType - Parse and resolve a full type. 1236bool LLParser::ParseType(PATypeHolder &Result, bool AllowVoid) { 1237 LocTy TypeLoc = Lex.getLoc(); 1238 if (ParseTypeRec(Result)) return true; 1239 1240 // Verify no unresolved uprefs. 1241 if (!UpRefs.empty()) 1242 return Error(UpRefs.back().Loc, "invalid unresolved type up reference"); 1243 1244 if (!AllowVoid && Result.get()->isVoidTy()) 1245 return Error(TypeLoc, "void type only allowed for function results"); 1246 1247 return false; 1248} 1249 1250/// HandleUpRefs - Every time we finish a new layer of types, this function is 1251/// called. It loops through the UpRefs vector, which is a list of the 1252/// currently active types. For each type, if the up-reference is contained in 1253/// the newly completed type, we decrement the level count. When the level 1254/// count reaches zero, the up-referenced type is the type that is passed in: 1255/// thus we can complete the cycle. 1256/// 1257PATypeHolder LLParser::HandleUpRefs(const Type *ty) { 1258 // If Ty isn't abstract, or if there are no up-references in it, then there is 1259 // nothing to resolve here. 1260 if (!ty->isAbstract() || UpRefs.empty()) return ty; 1261 1262 PATypeHolder Ty(ty); 1263#if 0 1264 dbgs() << "Type '" << Ty->getDescription() 1265 << "' newly formed. Resolving upreferences.\n" 1266 << UpRefs.size() << " upreferences active!\n"; 1267#endif 1268 1269 // If we find any resolvable upreferences (i.e., those whose NestingLevel goes 1270 // to zero), we resolve them all together before we resolve them to Ty. At 1271 // the end of the loop, if there is anything to resolve to Ty, it will be in 1272 // this variable. 1273 OpaqueType *TypeToResolve = 0; 1274 1275 for (unsigned i = 0; i != UpRefs.size(); ++i) { 1276 // Determine if 'Ty' directly contains this up-references 'LastContainedTy'. 1277 bool ContainsType = 1278 std::find(Ty->subtype_begin(), Ty->subtype_end(), 1279 UpRefs[i].LastContainedTy) != Ty->subtype_end(); 1280 1281#if 0 1282 dbgs() << " UR#" << i << " - TypeContains(" << Ty->getDescription() << ", " 1283 << UpRefs[i].LastContainedTy->getDescription() << ") = " 1284 << (ContainsType ? "true" : "false") 1285 << " level=" << UpRefs[i].NestingLevel << "\n"; 1286#endif 1287 if (!ContainsType) 1288 continue; 1289 1290 // Decrement level of upreference 1291 unsigned Level = --UpRefs[i].NestingLevel; 1292 UpRefs[i].LastContainedTy = Ty; 1293 1294 // If the Up-reference has a non-zero level, it shouldn't be resolved yet. 1295 if (Level != 0) 1296 continue; 1297 1298#if 0 1299 dbgs() << " * Resolving upreference for " << UpRefs[i].UpRefTy << "\n"; 1300#endif 1301 if (!TypeToResolve) 1302 TypeToResolve = UpRefs[i].UpRefTy; 1303 else 1304 UpRefs[i].UpRefTy->refineAbstractTypeTo(TypeToResolve); 1305 UpRefs.erase(UpRefs.begin()+i); // Remove from upreference list. 1306 --i; // Do not skip the next element. 1307 } 1308 1309 if (TypeToResolve) 1310 TypeToResolve->refineAbstractTypeTo(Ty); 1311 1312 return Ty; 1313} 1314 1315 1316/// ParseTypeRec - The recursive function used to process the internal 1317/// implementation details of types. 1318bool LLParser::ParseTypeRec(PATypeHolder &Result) { 1319 switch (Lex.getKind()) { 1320 default: 1321 return TokError("expected type"); 1322 case lltok::Type: 1323 // TypeRec ::= 'float' | 'void' (etc) 1324 Result = Lex.getTyVal(); 1325 Lex.Lex(); 1326 break; 1327 case lltok::kw_opaque: 1328 // TypeRec ::= 'opaque' 1329 Result = OpaqueType::get(Context); 1330 Lex.Lex(); 1331 break; 1332 case lltok::lbrace: 1333 // TypeRec ::= '{' ... '}' 1334 if (ParseStructType(Result, false)) 1335 return true; 1336 break; 1337 case lltok::kw_union: 1338 // TypeRec ::= 'union' '{' ... '}' 1339 if (ParseUnionType(Result)) 1340 return true; 1341 break; 1342 case lltok::lsquare: 1343 // TypeRec ::= '[' ... ']' 1344 Lex.Lex(); // eat the lsquare. 1345 if (ParseArrayVectorType(Result, false)) 1346 return true; 1347 break; 1348 case lltok::less: // Either vector or packed struct. 1349 // TypeRec ::= '<' ... '>' 1350 Lex.Lex(); 1351 if (Lex.getKind() == lltok::lbrace) { 1352 if (ParseStructType(Result, true) || 1353 ParseToken(lltok::greater, "expected '>' at end of packed struct")) 1354 return true; 1355 } else if (ParseArrayVectorType(Result, true)) 1356 return true; 1357 break; 1358 case lltok::LocalVar: 1359 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0 1360 // TypeRec ::= %foo 1361 if (const Type *T = M->getTypeByName(Lex.getStrVal())) { 1362 Result = T; 1363 } else { 1364 Result = OpaqueType::get(Context); 1365 ForwardRefTypes.insert(std::make_pair(Lex.getStrVal(), 1366 std::make_pair(Result, 1367 Lex.getLoc()))); 1368 M->addTypeName(Lex.getStrVal(), Result.get()); 1369 } 1370 Lex.Lex(); 1371 break; 1372 1373 case lltok::LocalVarID: 1374 // TypeRec ::= %4 1375 if (Lex.getUIntVal() < NumberedTypes.size()) 1376 Result = NumberedTypes[Lex.getUIntVal()]; 1377 else { 1378 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 1379 I = ForwardRefTypeIDs.find(Lex.getUIntVal()); 1380 if (I != ForwardRefTypeIDs.end()) 1381 Result = I->second.first; 1382 else { 1383 Result = OpaqueType::get(Context); 1384 ForwardRefTypeIDs.insert(std::make_pair(Lex.getUIntVal(), 1385 std::make_pair(Result, 1386 Lex.getLoc()))); 1387 } 1388 } 1389 Lex.Lex(); 1390 break; 1391 case lltok::backslash: { 1392 // TypeRec ::= '\' 4 1393 Lex.Lex(); 1394 unsigned Val; 1395 if (ParseUInt32(Val)) return true; 1396 OpaqueType *OT = OpaqueType::get(Context); //Use temporary placeholder. 1397 UpRefs.push_back(UpRefRecord(Lex.getLoc(), Val, OT)); 1398 Result = OT; 1399 break; 1400 } 1401 } 1402 1403 // Parse the type suffixes. 1404 while (1) { 1405 switch (Lex.getKind()) { 1406 // End of type. 1407 default: return false; 1408 1409 // TypeRec ::= TypeRec '*' 1410 case lltok::star: 1411 if (Result.get()->isLabelTy()) 1412 return TokError("basic block pointers are invalid"); 1413 if (Result.get()->isVoidTy()) 1414 return TokError("pointers to void are invalid; use i8* instead"); 1415 if (!PointerType::isValidElementType(Result.get())) 1416 return TokError("pointer to this type is invalid"); 1417 Result = HandleUpRefs(PointerType::getUnqual(Result.get())); 1418 Lex.Lex(); 1419 break; 1420 1421 // TypeRec ::= TypeRec 'addrspace' '(' uint32 ')' '*' 1422 case lltok::kw_addrspace: { 1423 if (Result.get()->isLabelTy()) 1424 return TokError("basic block pointers are invalid"); 1425 if (Result.get()->isVoidTy()) 1426 return TokError("pointers to void are invalid; use i8* instead"); 1427 if (!PointerType::isValidElementType(Result.get())) 1428 return TokError("pointer to this type is invalid"); 1429 unsigned AddrSpace; 1430 if (ParseOptionalAddrSpace(AddrSpace) || 1431 ParseToken(lltok::star, "expected '*' in address space")) 1432 return true; 1433 1434 Result = HandleUpRefs(PointerType::get(Result.get(), AddrSpace)); 1435 break; 1436 } 1437 1438 /// Types '(' ArgTypeListI ')' OptFuncAttrs 1439 case lltok::lparen: 1440 if (ParseFunctionType(Result)) 1441 return true; 1442 break; 1443 } 1444 } 1445} 1446 1447/// ParseParameterList 1448/// ::= '(' ')' 1449/// ::= '(' Arg (',' Arg)* ')' 1450/// Arg 1451/// ::= Type OptionalAttributes Value OptionalAttributes 1452bool LLParser::ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList, 1453 PerFunctionState &PFS) { 1454 if (ParseToken(lltok::lparen, "expected '(' in call")) 1455 return true; 1456 1457 while (Lex.getKind() != lltok::rparen) { 1458 // If this isn't the first argument, we need a comma. 1459 if (!ArgList.empty() && 1460 ParseToken(lltok::comma, "expected ',' in argument list")) 1461 return true; 1462 1463 // Parse the argument. 1464 LocTy ArgLoc; 1465 PATypeHolder ArgTy(Type::getVoidTy(Context)); 1466 unsigned ArgAttrs1 = Attribute::None; 1467 unsigned ArgAttrs2 = Attribute::None; 1468 Value *V; 1469 if (ParseType(ArgTy, ArgLoc)) 1470 return true; 1471 1472 // Otherwise, handle normal operands. 1473 if (ParseOptionalAttrs(ArgAttrs1, 0) || 1474 ParseValue(ArgTy, V, PFS) || 1475 // FIXME: Should not allow attributes after the argument, remove this 1476 // in LLVM 3.0. 1477 ParseOptionalAttrs(ArgAttrs2, 3)) 1478 return true; 1479 ArgList.push_back(ParamInfo(ArgLoc, V, ArgAttrs1|ArgAttrs2)); 1480 } 1481 1482 Lex.Lex(); // Lex the ')'. 1483 return false; 1484} 1485 1486 1487 1488/// ParseArgumentList - Parse the argument list for a function type or function 1489/// prototype. If 'inType' is true then we are parsing a FunctionType. 1490/// ::= '(' ArgTypeListI ')' 1491/// ArgTypeListI 1492/// ::= /*empty*/ 1493/// ::= '...' 1494/// ::= ArgTypeList ',' '...' 1495/// ::= ArgType (',' ArgType)* 1496/// 1497bool LLParser::ParseArgumentList(std::vector<ArgInfo> &ArgList, 1498 bool &isVarArg, bool inType) { 1499 isVarArg = false; 1500 assert(Lex.getKind() == lltok::lparen); 1501 Lex.Lex(); // eat the (. 1502 1503 if (Lex.getKind() == lltok::rparen) { 1504 // empty 1505 } else if (Lex.getKind() == lltok::dotdotdot) { 1506 isVarArg = true; 1507 Lex.Lex(); 1508 } else { 1509 LocTy TypeLoc = Lex.getLoc(); 1510 PATypeHolder ArgTy(Type::getVoidTy(Context)); 1511 unsigned Attrs; 1512 std::string Name; 1513 1514 // If we're parsing a type, use ParseTypeRec, because we allow recursive 1515 // types (such as a function returning a pointer to itself). If parsing a 1516 // function prototype, we require fully resolved types. 1517 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1518 ParseOptionalAttrs(Attrs, 0)) return true; 1519 1520 if (ArgTy->isVoidTy()) 1521 return Error(TypeLoc, "argument can not have void type"); 1522 1523 if (Lex.getKind() == lltok::LocalVar || 1524 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1525 Name = Lex.getStrVal(); 1526 Lex.Lex(); 1527 } 1528 1529 if (!FunctionType::isValidArgumentType(ArgTy)) 1530 return Error(TypeLoc, "invalid type for function argument"); 1531 1532 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1533 1534 while (EatIfPresent(lltok::comma)) { 1535 // Handle ... at end of arg list. 1536 if (EatIfPresent(lltok::dotdotdot)) { 1537 isVarArg = true; 1538 break; 1539 } 1540 1541 // Otherwise must be an argument type. 1542 TypeLoc = Lex.getLoc(); 1543 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1544 ParseOptionalAttrs(Attrs, 0)) return true; 1545 1546 if (ArgTy->isVoidTy()) 1547 return Error(TypeLoc, "argument can not have void type"); 1548 1549 if (Lex.getKind() == lltok::LocalVar || 1550 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1551 Name = Lex.getStrVal(); 1552 Lex.Lex(); 1553 } else { 1554 Name = ""; 1555 } 1556 1557 if (!ArgTy->isFirstClassType() && !ArgTy->isOpaqueTy()) 1558 return Error(TypeLoc, "invalid type for function argument"); 1559 1560 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1561 } 1562 } 1563 1564 return ParseToken(lltok::rparen, "expected ')' at end of argument list"); 1565} 1566 1567/// ParseFunctionType 1568/// ::= Type ArgumentList OptionalAttrs 1569bool LLParser::ParseFunctionType(PATypeHolder &Result) { 1570 assert(Lex.getKind() == lltok::lparen); 1571 1572 if (!FunctionType::isValidReturnType(Result)) 1573 return TokError("invalid function return type"); 1574 1575 std::vector<ArgInfo> ArgList; 1576 bool isVarArg; 1577 unsigned Attrs; 1578 if (ParseArgumentList(ArgList, isVarArg, true) || 1579 // FIXME: Allow, but ignore attributes on function types! 1580 // FIXME: Remove in LLVM 3.0 1581 ParseOptionalAttrs(Attrs, 2)) 1582 return true; 1583 1584 // Reject names on the arguments lists. 1585 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 1586 if (!ArgList[i].Name.empty()) 1587 return Error(ArgList[i].Loc, "argument name invalid in function type"); 1588 if (!ArgList[i].Attrs != 0) { 1589 // Allow but ignore attributes on function types; this permits 1590 // auto-upgrade. 1591 // FIXME: REJECT ATTRIBUTES ON FUNCTION TYPES in LLVM 3.0 1592 } 1593 } 1594 1595 std::vector<const Type*> ArgListTy; 1596 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 1597 ArgListTy.push_back(ArgList[i].Type); 1598 1599 Result = HandleUpRefs(FunctionType::get(Result.get(), 1600 ArgListTy, isVarArg)); 1601 return false; 1602} 1603 1604/// ParseStructType: Handles packed and unpacked types. </> parsed elsewhere. 1605/// TypeRec 1606/// ::= '{' '}' 1607/// ::= '{' TypeRec (',' TypeRec)* '}' 1608/// ::= '<' '{' '}' '>' 1609/// ::= '<' '{' TypeRec (',' TypeRec)* '}' '>' 1610bool LLParser::ParseStructType(PATypeHolder &Result, bool Packed) { 1611 assert(Lex.getKind() == lltok::lbrace); 1612 Lex.Lex(); // Consume the '{' 1613 1614 if (EatIfPresent(lltok::rbrace)) { 1615 Result = StructType::get(Context, Packed); 1616 return false; 1617 } 1618 1619 std::vector<PATypeHolder> ParamsList; 1620 LocTy EltTyLoc = Lex.getLoc(); 1621 if (ParseTypeRec(Result)) return true; 1622 ParamsList.push_back(Result); 1623 1624 if (Result->isVoidTy()) 1625 return Error(EltTyLoc, "struct element can not have void type"); 1626 if (!StructType::isValidElementType(Result)) 1627 return Error(EltTyLoc, "invalid element type for struct"); 1628 1629 while (EatIfPresent(lltok::comma)) { 1630 EltTyLoc = Lex.getLoc(); 1631 if (ParseTypeRec(Result)) return true; 1632 1633 if (Result->isVoidTy()) 1634 return Error(EltTyLoc, "struct element can not have void type"); 1635 if (!StructType::isValidElementType(Result)) 1636 return Error(EltTyLoc, "invalid element type for struct"); 1637 1638 ParamsList.push_back(Result); 1639 } 1640 1641 if (ParseToken(lltok::rbrace, "expected '}' at end of struct")) 1642 return true; 1643 1644 std::vector<const Type*> ParamsListTy; 1645 for (unsigned i = 0, e = ParamsList.size(); i != e; ++i) 1646 ParamsListTy.push_back(ParamsList[i].get()); 1647 Result = HandleUpRefs(StructType::get(Context, ParamsListTy, Packed)); 1648 return false; 1649} 1650 1651/// ParseUnionType 1652/// TypeRec 1653/// ::= 'union' '{' TypeRec (',' TypeRec)* '}' 1654bool LLParser::ParseUnionType(PATypeHolder &Result) { 1655 assert(Lex.getKind() == lltok::kw_union); 1656 Lex.Lex(); // Consume the 'union' 1657 1658 if (ParseToken(lltok::lbrace, "'{' expected after 'union'")) return true; 1659 1660 SmallVector<PATypeHolder, 8> ParamsList; 1661 do { 1662 LocTy EltTyLoc = Lex.getLoc(); 1663 if (ParseTypeRec(Result)) return true; 1664 ParamsList.push_back(Result); 1665 1666 if (Result->isVoidTy()) 1667 return Error(EltTyLoc, "union element can not have void type"); 1668 if (!UnionType::isValidElementType(Result)) 1669 return Error(EltTyLoc, "invalid element type for union"); 1670 1671 } while (EatIfPresent(lltok::comma)) ; 1672 1673 if (ParseToken(lltok::rbrace, "expected '}' at end of union")) 1674 return true; 1675 1676 SmallVector<const Type*, 8> ParamsListTy; 1677 for (unsigned i = 0, e = ParamsList.size(); i != e; ++i) 1678 ParamsListTy.push_back(ParamsList[i].get()); 1679 Result = HandleUpRefs(UnionType::get(&ParamsListTy[0], ParamsListTy.size())); 1680 return false; 1681} 1682 1683/// ParseArrayVectorType - Parse an array or vector type, assuming the first 1684/// token has already been consumed. 1685/// TypeRec 1686/// ::= '[' APSINTVAL 'x' Types ']' 1687/// ::= '<' APSINTVAL 'x' Types '>' 1688bool LLParser::ParseArrayVectorType(PATypeHolder &Result, bool isVector) { 1689 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned() || 1690 Lex.getAPSIntVal().getBitWidth() > 64) 1691 return TokError("expected number in address space"); 1692 1693 LocTy SizeLoc = Lex.getLoc(); 1694 uint64_t Size = Lex.getAPSIntVal().getZExtValue(); 1695 Lex.Lex(); 1696 1697 if (ParseToken(lltok::kw_x, "expected 'x' after element count")) 1698 return true; 1699 1700 LocTy TypeLoc = Lex.getLoc(); 1701 PATypeHolder EltTy(Type::getVoidTy(Context)); 1702 if (ParseTypeRec(EltTy)) return true; 1703 1704 if (EltTy->isVoidTy()) 1705 return Error(TypeLoc, "array and vector element type cannot be void"); 1706 1707 if (ParseToken(isVector ? lltok::greater : lltok::rsquare, 1708 "expected end of sequential type")) 1709 return true; 1710 1711 if (isVector) { 1712 if (Size == 0) 1713 return Error(SizeLoc, "zero element vector is illegal"); 1714 if ((unsigned)Size != Size) 1715 return Error(SizeLoc, "size too large for vector"); 1716 if (!VectorType::isValidElementType(EltTy)) 1717 return Error(TypeLoc, "vector element type must be fp or integer"); 1718 Result = VectorType::get(EltTy, unsigned(Size)); 1719 } else { 1720 if (!ArrayType::isValidElementType(EltTy)) 1721 return Error(TypeLoc, "invalid array element type"); 1722 Result = HandleUpRefs(ArrayType::get(EltTy, Size)); 1723 } 1724 return false; 1725} 1726 1727//===----------------------------------------------------------------------===// 1728// Function Semantic Analysis. 1729//===----------------------------------------------------------------------===// 1730 1731LLParser::PerFunctionState::PerFunctionState(LLParser &p, Function &f, 1732 int functionNumber) 1733 : P(p), F(f), FunctionNumber(functionNumber) { 1734 1735 // Insert unnamed arguments into the NumberedVals list. 1736 for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 1737 AI != E; ++AI) 1738 if (!AI->hasName()) 1739 NumberedVals.push_back(AI); 1740} 1741 1742LLParser::PerFunctionState::~PerFunctionState() { 1743 // If there were any forward referenced non-basicblock values, delete them. 1744 for (std::map<std::string, std::pair<Value*, LocTy> >::iterator 1745 I = ForwardRefVals.begin(), E = ForwardRefVals.end(); I != E; ++I) 1746 if (!isa<BasicBlock>(I->second.first)) { 1747 I->second.first->replaceAllUsesWith( 1748 UndefValue::get(I->second.first->getType())); 1749 delete I->second.first; 1750 I->second.first = 0; 1751 } 1752 1753 for (std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1754 I = ForwardRefValIDs.begin(), E = ForwardRefValIDs.end(); I != E; ++I) 1755 if (!isa<BasicBlock>(I->second.first)) { 1756 I->second.first->replaceAllUsesWith( 1757 UndefValue::get(I->second.first->getType())); 1758 delete I->second.first; 1759 I->second.first = 0; 1760 } 1761} 1762 1763bool LLParser::PerFunctionState::FinishFunction() { 1764 // Check to see if someone took the address of labels in this block. 1765 if (!P.ForwardRefBlockAddresses.empty()) { 1766 ValID FunctionID; 1767 if (!F.getName().empty()) { 1768 FunctionID.Kind = ValID::t_GlobalName; 1769 FunctionID.StrVal = F.getName(); 1770 } else { 1771 FunctionID.Kind = ValID::t_GlobalID; 1772 FunctionID.UIntVal = FunctionNumber; 1773 } 1774 1775 std::map<ValID, std::vector<std::pair<ValID, GlobalValue*> > >::iterator 1776 FRBAI = P.ForwardRefBlockAddresses.find(FunctionID); 1777 if (FRBAI != P.ForwardRefBlockAddresses.end()) { 1778 // Resolve all these references. 1779 if (P.ResolveForwardRefBlockAddresses(&F, FRBAI->second, this)) 1780 return true; 1781 1782 P.ForwardRefBlockAddresses.erase(FRBAI); 1783 } 1784 } 1785 1786 if (!ForwardRefVals.empty()) 1787 return P.Error(ForwardRefVals.begin()->second.second, 1788 "use of undefined value '%" + ForwardRefVals.begin()->first + 1789 "'"); 1790 if (!ForwardRefValIDs.empty()) 1791 return P.Error(ForwardRefValIDs.begin()->second.second, 1792 "use of undefined value '%" + 1793 utostr(ForwardRefValIDs.begin()->first) + "'"); 1794 return false; 1795} 1796 1797 1798/// GetVal - Get a value with the specified name or ID, creating a 1799/// forward reference record if needed. This can return null if the value 1800/// exists but does not have the right type. 1801Value *LLParser::PerFunctionState::GetVal(const std::string &Name, 1802 const Type *Ty, LocTy Loc) { 1803 // Look this name up in the normal function symbol table. 1804 Value *Val = F.getValueSymbolTable().lookup(Name); 1805 1806 // If this is a forward reference for the value, see if we already created a 1807 // forward ref record. 1808 if (Val == 0) { 1809 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1810 I = ForwardRefVals.find(Name); 1811 if (I != ForwardRefVals.end()) 1812 Val = I->second.first; 1813 } 1814 1815 // If we have the value in the symbol table or fwd-ref table, return it. 1816 if (Val) { 1817 if (Val->getType() == Ty) return Val; 1818 if (Ty->isLabelTy()) 1819 P.Error(Loc, "'%" + Name + "' is not a basic block"); 1820 else 1821 P.Error(Loc, "'%" + Name + "' defined with type '" + 1822 Val->getType()->getDescription() + "'"); 1823 return 0; 1824 } 1825 1826 // Don't make placeholders with invalid type. 1827 if (!Ty->isFirstClassType() && !Ty->isOpaqueTy() && !Ty->isLabelTy()) { 1828 P.Error(Loc, "invalid use of a non-first-class type"); 1829 return 0; 1830 } 1831 1832 // Otherwise, create a new forward reference for this value and remember it. 1833 Value *FwdVal; 1834 if (Ty->isLabelTy()) 1835 FwdVal = BasicBlock::Create(F.getContext(), Name, &F); 1836 else 1837 FwdVal = new Argument(Ty, Name); 1838 1839 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 1840 return FwdVal; 1841} 1842 1843Value *LLParser::PerFunctionState::GetVal(unsigned ID, const Type *Ty, 1844 LocTy Loc) { 1845 // Look this name up in the normal function symbol table. 1846 Value *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 1847 1848 // If this is a forward reference for the value, see if we already created a 1849 // forward ref record. 1850 if (Val == 0) { 1851 std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1852 I = ForwardRefValIDs.find(ID); 1853 if (I != ForwardRefValIDs.end()) 1854 Val = I->second.first; 1855 } 1856 1857 // If we have the value in the symbol table or fwd-ref table, return it. 1858 if (Val) { 1859 if (Val->getType() == Ty) return Val; 1860 if (Ty->isLabelTy()) 1861 P.Error(Loc, "'%" + utostr(ID) + "' is not a basic block"); 1862 else 1863 P.Error(Loc, "'%" + utostr(ID) + "' defined with type '" + 1864 Val->getType()->getDescription() + "'"); 1865 return 0; 1866 } 1867 1868 if (!Ty->isFirstClassType() && !Ty->isOpaqueTy() && !Ty->isLabelTy()) { 1869 P.Error(Loc, "invalid use of a non-first-class type"); 1870 return 0; 1871 } 1872 1873 // Otherwise, create a new forward reference for this value and remember it. 1874 Value *FwdVal; 1875 if (Ty->isLabelTy()) 1876 FwdVal = BasicBlock::Create(F.getContext(), "", &F); 1877 else 1878 FwdVal = new Argument(Ty); 1879 1880 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 1881 return FwdVal; 1882} 1883 1884/// SetInstName - After an instruction is parsed and inserted into its 1885/// basic block, this installs its name. 1886bool LLParser::PerFunctionState::SetInstName(int NameID, 1887 const std::string &NameStr, 1888 LocTy NameLoc, Instruction *Inst) { 1889 // If this instruction has void type, it cannot have a name or ID specified. 1890 if (Inst->getType()->isVoidTy()) { 1891 if (NameID != -1 || !NameStr.empty()) 1892 return P.Error(NameLoc, "instructions returning void cannot have a name"); 1893 return false; 1894 } 1895 1896 // If this was a numbered instruction, verify that the instruction is the 1897 // expected value and resolve any forward references. 1898 if (NameStr.empty()) { 1899 // If neither a name nor an ID was specified, just use the next ID. 1900 if (NameID == -1) 1901 NameID = NumberedVals.size(); 1902 1903 if (unsigned(NameID) != NumberedVals.size()) 1904 return P.Error(NameLoc, "instruction expected to be numbered '%" + 1905 utostr(NumberedVals.size()) + "'"); 1906 1907 std::map<unsigned, std::pair<Value*, LocTy> >::iterator FI = 1908 ForwardRefValIDs.find(NameID); 1909 if (FI != ForwardRefValIDs.end()) { 1910 if (FI->second.first->getType() != Inst->getType()) 1911 return P.Error(NameLoc, "instruction forward referenced with type '" + 1912 FI->second.first->getType()->getDescription() + "'"); 1913 FI->second.first->replaceAllUsesWith(Inst); 1914 delete FI->second.first; 1915 ForwardRefValIDs.erase(FI); 1916 } 1917 1918 NumberedVals.push_back(Inst); 1919 return false; 1920 } 1921 1922 // Otherwise, the instruction had a name. Resolve forward refs and set it. 1923 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1924 FI = ForwardRefVals.find(NameStr); 1925 if (FI != ForwardRefVals.end()) { 1926 if (FI->second.first->getType() != Inst->getType()) 1927 return P.Error(NameLoc, "instruction forward referenced with type '" + 1928 FI->second.first->getType()->getDescription() + "'"); 1929 FI->second.first->replaceAllUsesWith(Inst); 1930 delete FI->second.first; 1931 ForwardRefVals.erase(FI); 1932 } 1933 1934 // Set the name on the instruction. 1935 Inst->setName(NameStr); 1936 1937 if (Inst->getNameStr() != NameStr) 1938 return P.Error(NameLoc, "multiple definition of local value named '" + 1939 NameStr + "'"); 1940 return false; 1941} 1942 1943/// GetBB - Get a basic block with the specified name or ID, creating a 1944/// forward reference record if needed. 1945BasicBlock *LLParser::PerFunctionState::GetBB(const std::string &Name, 1946 LocTy Loc) { 1947 return cast_or_null<BasicBlock>(GetVal(Name, 1948 Type::getLabelTy(F.getContext()), Loc)); 1949} 1950 1951BasicBlock *LLParser::PerFunctionState::GetBB(unsigned ID, LocTy Loc) { 1952 return cast_or_null<BasicBlock>(GetVal(ID, 1953 Type::getLabelTy(F.getContext()), Loc)); 1954} 1955 1956/// DefineBB - Define the specified basic block, which is either named or 1957/// unnamed. If there is an error, this returns null otherwise it returns 1958/// the block being defined. 1959BasicBlock *LLParser::PerFunctionState::DefineBB(const std::string &Name, 1960 LocTy Loc) { 1961 BasicBlock *BB; 1962 if (Name.empty()) 1963 BB = GetBB(NumberedVals.size(), Loc); 1964 else 1965 BB = GetBB(Name, Loc); 1966 if (BB == 0) return 0; // Already diagnosed error. 1967 1968 // Move the block to the end of the function. Forward ref'd blocks are 1969 // inserted wherever they happen to be referenced. 1970 F.getBasicBlockList().splice(F.end(), F.getBasicBlockList(), BB); 1971 1972 // Remove the block from forward ref sets. 1973 if (Name.empty()) { 1974 ForwardRefValIDs.erase(NumberedVals.size()); 1975 NumberedVals.push_back(BB); 1976 } else { 1977 // BB forward references are already in the function symbol table. 1978 ForwardRefVals.erase(Name); 1979 } 1980 1981 return BB; 1982} 1983 1984//===----------------------------------------------------------------------===// 1985// Constants. 1986//===----------------------------------------------------------------------===// 1987 1988/// ParseValID - Parse an abstract value that doesn't necessarily have a 1989/// type implied. For example, if we parse "4" we don't know what integer type 1990/// it has. The value will later be combined with its type and checked for 1991/// sanity. PFS is used to convert function-local operands of metadata (since 1992/// metadata operands are not just parsed here but also converted to values). 1993/// PFS can be null when we are not parsing metadata values inside a function. 1994bool LLParser::ParseValID(ValID &ID, PerFunctionState *PFS) { 1995 ID.Loc = Lex.getLoc(); 1996 switch (Lex.getKind()) { 1997 default: return TokError("expected value token"); 1998 case lltok::GlobalID: // @42 1999 ID.UIntVal = Lex.getUIntVal(); 2000 ID.Kind = ValID::t_GlobalID; 2001 break; 2002 case lltok::GlobalVar: // @foo 2003 ID.StrVal = Lex.getStrVal(); 2004 ID.Kind = ValID::t_GlobalName; 2005 break; 2006 case lltok::LocalVarID: // %42 2007 ID.UIntVal = Lex.getUIntVal(); 2008 ID.Kind = ValID::t_LocalID; 2009 break; 2010 case lltok::LocalVar: // %foo 2011 case lltok::StringConstant: // "foo" - FIXME: REMOVE IN LLVM 3.0 2012 ID.StrVal = Lex.getStrVal(); 2013 ID.Kind = ValID::t_LocalName; 2014 break; 2015 case lltok::exclaim: // !{...} MDNode, !"foo" MDString 2016 Lex.Lex(); 2017 2018 if (EatIfPresent(lltok::lbrace)) { 2019 SmallVector<Value*, 16> Elts; 2020 if (ParseMDNodeVector(Elts, PFS) || 2021 ParseToken(lltok::rbrace, "expected end of metadata node")) 2022 return true; 2023 2024 ID.MDNodeVal = MDNode::get(Context, Elts.data(), Elts.size()); 2025 ID.Kind = ValID::t_MDNode; 2026 return false; 2027 } 2028 2029 // Standalone metadata reference 2030 // !{ ..., !42, ... } 2031 if (Lex.getKind() == lltok::APSInt) { 2032 if (ParseMDNodeID(ID.MDNodeVal)) return true; 2033 ID.Kind = ValID::t_MDNode; 2034 return false; 2035 } 2036 2037 // MDString: 2038 // ::= '!' STRINGCONSTANT 2039 if (ParseMDString(ID.MDStringVal)) return true; 2040 ID.Kind = ValID::t_MDString; 2041 return false; 2042 case lltok::APSInt: 2043 ID.APSIntVal = Lex.getAPSIntVal(); 2044 ID.Kind = ValID::t_APSInt; 2045 break; 2046 case lltok::APFloat: 2047 ID.APFloatVal = Lex.getAPFloatVal(); 2048 ID.Kind = ValID::t_APFloat; 2049 break; 2050 case lltok::kw_true: 2051 ID.ConstantVal = ConstantInt::getTrue(Context); 2052 ID.Kind = ValID::t_Constant; 2053 break; 2054 case lltok::kw_false: 2055 ID.ConstantVal = ConstantInt::getFalse(Context); 2056 ID.Kind = ValID::t_Constant; 2057 break; 2058 case lltok::kw_null: ID.Kind = ValID::t_Null; break; 2059 case lltok::kw_undef: ID.Kind = ValID::t_Undef; break; 2060 case lltok::kw_zeroinitializer: ID.Kind = ValID::t_Zero; break; 2061 2062 case lltok::lbrace: { 2063 // ValID ::= '{' ConstVector '}' 2064 Lex.Lex(); 2065 SmallVector<Constant*, 16> Elts; 2066 if (ParseGlobalValueVector(Elts) || 2067 ParseToken(lltok::rbrace, "expected end of struct constant")) 2068 return true; 2069 2070 ID.ConstantVal = ConstantStruct::get(Context, Elts.data(), 2071 Elts.size(), false); 2072 ID.Kind = ValID::t_Constant; 2073 return false; 2074 } 2075 case lltok::less: { 2076 // ValID ::= '<' ConstVector '>' --> Vector. 2077 // ValID ::= '<' '{' ConstVector '}' '>' --> Packed Struct. 2078 Lex.Lex(); 2079 bool isPackedStruct = EatIfPresent(lltok::lbrace); 2080 2081 SmallVector<Constant*, 16> Elts; 2082 LocTy FirstEltLoc = Lex.getLoc(); 2083 if (ParseGlobalValueVector(Elts) || 2084 (isPackedStruct && 2085 ParseToken(lltok::rbrace, "expected end of packed struct")) || 2086 ParseToken(lltok::greater, "expected end of constant")) 2087 return true; 2088 2089 if (isPackedStruct) { 2090 ID.ConstantVal = 2091 ConstantStruct::get(Context, Elts.data(), Elts.size(), true); 2092 ID.Kind = ValID::t_Constant; 2093 return false; 2094 } 2095 2096 if (Elts.empty()) 2097 return Error(ID.Loc, "constant vector must not be empty"); 2098 2099 if (!Elts[0]->getType()->isIntegerTy() && 2100 !Elts[0]->getType()->isFloatingPointTy()) 2101 return Error(FirstEltLoc, 2102 "vector elements must have integer or floating point type"); 2103 2104 // Verify that all the vector elements have the same type. 2105 for (unsigned i = 1, e = Elts.size(); i != e; ++i) 2106 if (Elts[i]->getType() != Elts[0]->getType()) 2107 return Error(FirstEltLoc, 2108 "vector element #" + utostr(i) + 2109 " is not of type '" + Elts[0]->getType()->getDescription()); 2110 2111 ID.ConstantVal = ConstantVector::get(Elts.data(), Elts.size()); 2112 ID.Kind = ValID::t_Constant; 2113 return false; 2114 } 2115 case lltok::lsquare: { // Array Constant 2116 Lex.Lex(); 2117 SmallVector<Constant*, 16> Elts; 2118 LocTy FirstEltLoc = Lex.getLoc(); 2119 if (ParseGlobalValueVector(Elts) || 2120 ParseToken(lltok::rsquare, "expected end of array constant")) 2121 return true; 2122 2123 // Handle empty element. 2124 if (Elts.empty()) { 2125 // Use undef instead of an array because it's inconvenient to determine 2126 // the element type at this point, there being no elements to examine. 2127 ID.Kind = ValID::t_EmptyArray; 2128 return false; 2129 } 2130 2131 if (!Elts[0]->getType()->isFirstClassType()) 2132 return Error(FirstEltLoc, "invalid array element type: " + 2133 Elts[0]->getType()->getDescription()); 2134 2135 ArrayType *ATy = ArrayType::get(Elts[0]->getType(), Elts.size()); 2136 2137 // Verify all elements are correct type! 2138 for (unsigned i = 0, e = Elts.size(); i != e; ++i) { 2139 if (Elts[i]->getType() != Elts[0]->getType()) 2140 return Error(FirstEltLoc, 2141 "array element #" + utostr(i) + 2142 " is not of type '" +Elts[0]->getType()->getDescription()); 2143 } 2144 2145 ID.ConstantVal = ConstantArray::get(ATy, Elts.data(), Elts.size()); 2146 ID.Kind = ValID::t_Constant; 2147 return false; 2148 } 2149 case lltok::kw_c: // c "foo" 2150 Lex.Lex(); 2151 ID.ConstantVal = ConstantArray::get(Context, Lex.getStrVal(), false); 2152 if (ParseToken(lltok::StringConstant, "expected string")) return true; 2153 ID.Kind = ValID::t_Constant; 2154 return false; 2155 2156 case lltok::kw_asm: { 2157 // ValID ::= 'asm' SideEffect? AlignStack? STRINGCONSTANT ',' STRINGCONSTANT 2158 bool HasSideEffect, AlignStack; 2159 Lex.Lex(); 2160 if (ParseOptionalToken(lltok::kw_sideeffect, HasSideEffect) || 2161 ParseOptionalToken(lltok::kw_alignstack, AlignStack) || 2162 ParseStringConstant(ID.StrVal) || 2163 ParseToken(lltok::comma, "expected comma in inline asm expression") || 2164 ParseToken(lltok::StringConstant, "expected constraint string")) 2165 return true; 2166 ID.StrVal2 = Lex.getStrVal(); 2167 ID.UIntVal = unsigned(HasSideEffect) | (unsigned(AlignStack)<<1); 2168 ID.Kind = ValID::t_InlineAsm; 2169 return false; 2170 } 2171 2172 case lltok::kw_blockaddress: { 2173 // ValID ::= 'blockaddress' '(' @foo ',' %bar ')' 2174 Lex.Lex(); 2175 2176 ValID Fn, Label; 2177 LocTy FnLoc, LabelLoc; 2178 2179 if (ParseToken(lltok::lparen, "expected '(' in block address expression") || 2180 ParseValID(Fn) || 2181 ParseToken(lltok::comma, "expected comma in block address expression")|| 2182 ParseValID(Label) || 2183 ParseToken(lltok::rparen, "expected ')' in block address expression")) 2184 return true; 2185 2186 if (Fn.Kind != ValID::t_GlobalID && Fn.Kind != ValID::t_GlobalName) 2187 return Error(Fn.Loc, "expected function name in blockaddress"); 2188 if (Label.Kind != ValID::t_LocalID && Label.Kind != ValID::t_LocalName) 2189 return Error(Label.Loc, "expected basic block name in blockaddress"); 2190 2191 // Make a global variable as a placeholder for this reference. 2192 GlobalVariable *FwdRef = new GlobalVariable(*M, Type::getInt8Ty(Context), 2193 false, GlobalValue::InternalLinkage, 2194 0, ""); 2195 ForwardRefBlockAddresses[Fn].push_back(std::make_pair(Label, FwdRef)); 2196 ID.ConstantVal = FwdRef; 2197 ID.Kind = ValID::t_Constant; 2198 return false; 2199 } 2200 2201 case lltok::kw_trunc: 2202 case lltok::kw_zext: 2203 case lltok::kw_sext: 2204 case lltok::kw_fptrunc: 2205 case lltok::kw_fpext: 2206 case lltok::kw_bitcast: 2207 case lltok::kw_uitofp: 2208 case lltok::kw_sitofp: 2209 case lltok::kw_fptoui: 2210 case lltok::kw_fptosi: 2211 case lltok::kw_inttoptr: 2212 case lltok::kw_ptrtoint: { 2213 unsigned Opc = Lex.getUIntVal(); 2214 PATypeHolder DestTy(Type::getVoidTy(Context)); 2215 Constant *SrcVal; 2216 Lex.Lex(); 2217 if (ParseToken(lltok::lparen, "expected '(' after constantexpr cast") || 2218 ParseGlobalTypeAndValue(SrcVal) || 2219 ParseToken(lltok::kw_to, "expected 'to' in constantexpr cast") || 2220 ParseType(DestTy) || 2221 ParseToken(lltok::rparen, "expected ')' at end of constantexpr cast")) 2222 return true; 2223 if (!CastInst::castIsValid((Instruction::CastOps)Opc, SrcVal, DestTy)) 2224 return Error(ID.Loc, "invalid cast opcode for cast from '" + 2225 SrcVal->getType()->getDescription() + "' to '" + 2226 DestTy->getDescription() + "'"); 2227 ID.ConstantVal = ConstantExpr::getCast((Instruction::CastOps)Opc, 2228 SrcVal, DestTy); 2229 ID.Kind = ValID::t_Constant; 2230 return false; 2231 } 2232 case lltok::kw_extractvalue: { 2233 Lex.Lex(); 2234 Constant *Val; 2235 SmallVector<unsigned, 4> Indices; 2236 if (ParseToken(lltok::lparen, "expected '(' in extractvalue constantexpr")|| 2237 ParseGlobalTypeAndValue(Val) || 2238 ParseIndexList(Indices) || 2239 ParseToken(lltok::rparen, "expected ')' in extractvalue constantexpr")) 2240 return true; 2241 2242 if (!Val->getType()->isAggregateType()) 2243 return Error(ID.Loc, "extractvalue operand must be aggregate type"); 2244 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 2245 Indices.end())) 2246 return Error(ID.Loc, "invalid indices for extractvalue"); 2247 ID.ConstantVal = 2248 ConstantExpr::getExtractValue(Val, Indices.data(), Indices.size()); 2249 ID.Kind = ValID::t_Constant; 2250 return false; 2251 } 2252 case lltok::kw_insertvalue: { 2253 Lex.Lex(); 2254 Constant *Val0, *Val1; 2255 SmallVector<unsigned, 4> Indices; 2256 if (ParseToken(lltok::lparen, "expected '(' in insertvalue constantexpr")|| 2257 ParseGlobalTypeAndValue(Val0) || 2258 ParseToken(lltok::comma, "expected comma in insertvalue constantexpr")|| 2259 ParseGlobalTypeAndValue(Val1) || 2260 ParseIndexList(Indices) || 2261 ParseToken(lltok::rparen, "expected ')' in insertvalue constantexpr")) 2262 return true; 2263 if (!Val0->getType()->isAggregateType()) 2264 return Error(ID.Loc, "insertvalue operand must be aggregate type"); 2265 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 2266 Indices.end())) 2267 return Error(ID.Loc, "invalid indices for insertvalue"); 2268 ID.ConstantVal = ConstantExpr::getInsertValue(Val0, Val1, 2269 Indices.data(), Indices.size()); 2270 ID.Kind = ValID::t_Constant; 2271 return false; 2272 } 2273 case lltok::kw_icmp: 2274 case lltok::kw_fcmp: { 2275 unsigned PredVal, Opc = Lex.getUIntVal(); 2276 Constant *Val0, *Val1; 2277 Lex.Lex(); 2278 if (ParseCmpPredicate(PredVal, Opc) || 2279 ParseToken(lltok::lparen, "expected '(' in compare constantexpr") || 2280 ParseGlobalTypeAndValue(Val0) || 2281 ParseToken(lltok::comma, "expected comma in compare constantexpr") || 2282 ParseGlobalTypeAndValue(Val1) || 2283 ParseToken(lltok::rparen, "expected ')' in compare constantexpr")) 2284 return true; 2285 2286 if (Val0->getType() != Val1->getType()) 2287 return Error(ID.Loc, "compare operands must have the same type"); 2288 2289 CmpInst::Predicate Pred = (CmpInst::Predicate)PredVal; 2290 2291 if (Opc == Instruction::FCmp) { 2292 if (!Val0->getType()->isFPOrFPVectorTy()) 2293 return Error(ID.Loc, "fcmp requires floating point operands"); 2294 ID.ConstantVal = ConstantExpr::getFCmp(Pred, Val0, Val1); 2295 } else { 2296 assert(Opc == Instruction::ICmp && "Unexpected opcode for CmpInst!"); 2297 if (!Val0->getType()->isIntOrIntVectorTy() && 2298 !Val0->getType()->isPointerTy()) 2299 return Error(ID.Loc, "icmp requires pointer or integer operands"); 2300 ID.ConstantVal = ConstantExpr::getICmp(Pred, Val0, Val1); 2301 } 2302 ID.Kind = ValID::t_Constant; 2303 return false; 2304 } 2305 2306 // Binary Operators. 2307 case lltok::kw_add: 2308 case lltok::kw_fadd: 2309 case lltok::kw_sub: 2310 case lltok::kw_fsub: 2311 case lltok::kw_mul: 2312 case lltok::kw_fmul: 2313 case lltok::kw_udiv: 2314 case lltok::kw_sdiv: 2315 case lltok::kw_fdiv: 2316 case lltok::kw_urem: 2317 case lltok::kw_srem: 2318 case lltok::kw_frem: { 2319 bool NUW = false; 2320 bool NSW = false; 2321 bool Exact = false; 2322 unsigned Opc = Lex.getUIntVal(); 2323 Constant *Val0, *Val1; 2324 Lex.Lex(); 2325 LocTy ModifierLoc = Lex.getLoc(); 2326 if (Opc == Instruction::Add || 2327 Opc == Instruction::Sub || 2328 Opc == Instruction::Mul) { 2329 if (EatIfPresent(lltok::kw_nuw)) 2330 NUW = true; 2331 if (EatIfPresent(lltok::kw_nsw)) { 2332 NSW = true; 2333 if (EatIfPresent(lltok::kw_nuw)) 2334 NUW = true; 2335 } 2336 } else if (Opc == Instruction::SDiv) { 2337 if (EatIfPresent(lltok::kw_exact)) 2338 Exact = true; 2339 } 2340 if (ParseToken(lltok::lparen, "expected '(' in binary constantexpr") || 2341 ParseGlobalTypeAndValue(Val0) || 2342 ParseToken(lltok::comma, "expected comma in binary constantexpr") || 2343 ParseGlobalTypeAndValue(Val1) || 2344 ParseToken(lltok::rparen, "expected ')' in binary constantexpr")) 2345 return true; 2346 if (Val0->getType() != Val1->getType()) 2347 return Error(ID.Loc, "operands of constexpr must have same type"); 2348 if (!Val0->getType()->isIntOrIntVectorTy()) { 2349 if (NUW) 2350 return Error(ModifierLoc, "nuw only applies to integer operations"); 2351 if (NSW) 2352 return Error(ModifierLoc, "nsw only applies to integer operations"); 2353 } 2354 // API compatibility: Accept either integer or floating-point types with 2355 // add, sub, and mul. 2356 if (!Val0->getType()->isIntOrIntVectorTy() && 2357 !Val0->getType()->isFPOrFPVectorTy()) 2358 return Error(ID.Loc,"constexpr requires integer, fp, or vector operands"); 2359 unsigned Flags = 0; 2360 if (NUW) Flags |= OverflowingBinaryOperator::NoUnsignedWrap; 2361 if (NSW) Flags |= OverflowingBinaryOperator::NoSignedWrap; 2362 if (Exact) Flags |= SDivOperator::IsExact; 2363 Constant *C = ConstantExpr::get(Opc, Val0, Val1, Flags); 2364 ID.ConstantVal = C; 2365 ID.Kind = ValID::t_Constant; 2366 return false; 2367 } 2368 2369 // Logical Operations 2370 case lltok::kw_shl: 2371 case lltok::kw_lshr: 2372 case lltok::kw_ashr: 2373 case lltok::kw_and: 2374 case lltok::kw_or: 2375 case lltok::kw_xor: { 2376 unsigned Opc = Lex.getUIntVal(); 2377 Constant *Val0, *Val1; 2378 Lex.Lex(); 2379 if (ParseToken(lltok::lparen, "expected '(' in logical constantexpr") || 2380 ParseGlobalTypeAndValue(Val0) || 2381 ParseToken(lltok::comma, "expected comma in logical constantexpr") || 2382 ParseGlobalTypeAndValue(Val1) || 2383 ParseToken(lltok::rparen, "expected ')' in logical constantexpr")) 2384 return true; 2385 if (Val0->getType() != Val1->getType()) 2386 return Error(ID.Loc, "operands of constexpr must have same type"); 2387 if (!Val0->getType()->isIntOrIntVectorTy()) 2388 return Error(ID.Loc, 2389 "constexpr requires integer or integer vector operands"); 2390 ID.ConstantVal = ConstantExpr::get(Opc, Val0, Val1); 2391 ID.Kind = ValID::t_Constant; 2392 return false; 2393 } 2394 2395 case lltok::kw_getelementptr: 2396 case lltok::kw_shufflevector: 2397 case lltok::kw_insertelement: 2398 case lltok::kw_extractelement: 2399 case lltok::kw_select: { 2400 unsigned Opc = Lex.getUIntVal(); 2401 SmallVector<Constant*, 16> Elts; 2402 bool InBounds = false; 2403 Lex.Lex(); 2404 if (Opc == Instruction::GetElementPtr) 2405 InBounds = EatIfPresent(lltok::kw_inbounds); 2406 if (ParseToken(lltok::lparen, "expected '(' in constantexpr") || 2407 ParseGlobalValueVector(Elts) || 2408 ParseToken(lltok::rparen, "expected ')' in constantexpr")) 2409 return true; 2410 2411 if (Opc == Instruction::GetElementPtr) { 2412 if (Elts.size() == 0 || !Elts[0]->getType()->isPointerTy()) 2413 return Error(ID.Loc, "getelementptr requires pointer operand"); 2414 2415 if (!GetElementPtrInst::getIndexedType(Elts[0]->getType(), 2416 (Value**)(Elts.data() + 1), 2417 Elts.size() - 1)) 2418 return Error(ID.Loc, "invalid indices for getelementptr"); 2419 ID.ConstantVal = InBounds ? 2420 ConstantExpr::getInBoundsGetElementPtr(Elts[0], 2421 Elts.data() + 1, 2422 Elts.size() - 1) : 2423 ConstantExpr::getGetElementPtr(Elts[0], 2424 Elts.data() + 1, Elts.size() - 1); 2425 } else if (Opc == Instruction::Select) { 2426 if (Elts.size() != 3) 2427 return Error(ID.Loc, "expected three operands to select"); 2428 if (const char *Reason = SelectInst::areInvalidOperands(Elts[0], Elts[1], 2429 Elts[2])) 2430 return Error(ID.Loc, Reason); 2431 ID.ConstantVal = ConstantExpr::getSelect(Elts[0], Elts[1], Elts[2]); 2432 } else if (Opc == Instruction::ShuffleVector) { 2433 if (Elts.size() != 3) 2434 return Error(ID.Loc, "expected three operands to shufflevector"); 2435 if (!ShuffleVectorInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2436 return Error(ID.Loc, "invalid operands to shufflevector"); 2437 ID.ConstantVal = 2438 ConstantExpr::getShuffleVector(Elts[0], Elts[1],Elts[2]); 2439 } else if (Opc == Instruction::ExtractElement) { 2440 if (Elts.size() != 2) 2441 return Error(ID.Loc, "expected two operands to extractelement"); 2442 if (!ExtractElementInst::isValidOperands(Elts[0], Elts[1])) 2443 return Error(ID.Loc, "invalid extractelement operands"); 2444 ID.ConstantVal = ConstantExpr::getExtractElement(Elts[0], Elts[1]); 2445 } else { 2446 assert(Opc == Instruction::InsertElement && "Unknown opcode"); 2447 if (Elts.size() != 3) 2448 return Error(ID.Loc, "expected three operands to insertelement"); 2449 if (!InsertElementInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2450 return Error(ID.Loc, "invalid insertelement operands"); 2451 ID.ConstantVal = 2452 ConstantExpr::getInsertElement(Elts[0], Elts[1],Elts[2]); 2453 } 2454 2455 ID.Kind = ValID::t_Constant; 2456 return false; 2457 } 2458 } 2459 2460 Lex.Lex(); 2461 return false; 2462} 2463 2464/// ParseGlobalValue - Parse a global value with the specified type. 2465bool LLParser::ParseGlobalValue(const Type *Ty, Constant *&C) { 2466 C = 0; 2467 ValID ID; 2468 Value *V = NULL; 2469 bool Parsed = ParseValID(ID) || 2470 ConvertValIDToValue(Ty, ID, V, NULL); 2471 if (V && !(C = dyn_cast<Constant>(V))) 2472 return Error(ID.Loc, "global values must be constants"); 2473 return Parsed; 2474} 2475 2476bool LLParser::ParseGlobalTypeAndValue(Constant *&V) { 2477 PATypeHolder Type(Type::getVoidTy(Context)); 2478 return ParseType(Type) || 2479 ParseGlobalValue(Type, V); 2480} 2481 2482/// ParseGlobalValueVector 2483/// ::= /*empty*/ 2484/// ::= TypeAndValue (',' TypeAndValue)* 2485bool LLParser::ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts) { 2486 // Empty list. 2487 if (Lex.getKind() == lltok::rbrace || 2488 Lex.getKind() == lltok::rsquare || 2489 Lex.getKind() == lltok::greater || 2490 Lex.getKind() == lltok::rparen) 2491 return false; 2492 2493 Constant *C; 2494 if (ParseGlobalTypeAndValue(C)) return true; 2495 Elts.push_back(C); 2496 2497 while (EatIfPresent(lltok::comma)) { 2498 if (ParseGlobalTypeAndValue(C)) return true; 2499 Elts.push_back(C); 2500 } 2501 2502 return false; 2503} 2504 2505 2506//===----------------------------------------------------------------------===// 2507// Function Parsing. 2508//===----------------------------------------------------------------------===// 2509 2510bool LLParser::ConvertValIDToValue(const Type *Ty, ValID &ID, Value *&V, 2511 PerFunctionState *PFS) { 2512 if (Ty->isFunctionTy()) 2513 return Error(ID.Loc, "functions are not values, refer to them as pointers"); 2514 2515 switch (ID.Kind) { 2516 default: llvm_unreachable("Unknown ValID!"); 2517 case ValID::t_LocalID: 2518 if (!PFS) return Error(ID.Loc, "invalid use of function-local name"); 2519 V = PFS->GetVal(ID.UIntVal, Ty, ID.Loc); 2520 return (V == 0); 2521 case ValID::t_LocalName: 2522 if (!PFS) return Error(ID.Loc, "invalid use of function-local name"); 2523 V = PFS->GetVal(ID.StrVal, Ty, ID.Loc); 2524 return (V == 0); 2525 case ValID::t_InlineAsm: { 2526 const PointerType *PTy = dyn_cast<PointerType>(Ty); 2527 const FunctionType *FTy = 2528 PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : 0; 2529 if (!FTy || !InlineAsm::Verify(FTy, ID.StrVal2)) 2530 return Error(ID.Loc, "invalid type for inline asm constraint string"); 2531 V = InlineAsm::get(FTy, ID.StrVal, ID.StrVal2, ID.UIntVal&1, ID.UIntVal>>1); 2532 return false; 2533 } 2534 case ValID::t_MDNode: 2535 if (!Ty->isMetadataTy()) 2536 return Error(ID.Loc, "metadata value must have metadata type"); 2537 V = ID.MDNodeVal; 2538 return false; 2539 case ValID::t_MDString: 2540 if (!Ty->isMetadataTy()) 2541 return Error(ID.Loc, "metadata value must have metadata type"); 2542 V = ID.MDStringVal; 2543 return false; 2544 case ValID::t_GlobalName: 2545 V = GetGlobalVal(ID.StrVal, Ty, ID.Loc); 2546 return V == 0; 2547 case ValID::t_GlobalID: 2548 V = GetGlobalVal(ID.UIntVal, Ty, ID.Loc); 2549 return V == 0; 2550 case ValID::t_APSInt: 2551 if (!Ty->isIntegerTy()) 2552 return Error(ID.Loc, "integer constant must have integer type"); 2553 ID.APSIntVal.extOrTrunc(Ty->getPrimitiveSizeInBits()); 2554 V = ConstantInt::get(Context, ID.APSIntVal); 2555 return false; 2556 case ValID::t_APFloat: 2557 if (!Ty->isFloatingPointTy() || 2558 !ConstantFP::isValueValidForType(Ty, ID.APFloatVal)) 2559 return Error(ID.Loc, "floating point constant invalid for type"); 2560 2561 // The lexer has no type info, so builds all float and double FP constants 2562 // as double. Fix this here. Long double does not need this. 2563 if (&ID.APFloatVal.getSemantics() == &APFloat::IEEEdouble && 2564 Ty->isFloatTy()) { 2565 bool Ignored; 2566 ID.APFloatVal.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, 2567 &Ignored); 2568 } 2569 V = ConstantFP::get(Context, ID.APFloatVal); 2570 2571 if (V->getType() != Ty) 2572 return Error(ID.Loc, "floating point constant does not have type '" + 2573 Ty->getDescription() + "'"); 2574 2575 return false; 2576 case ValID::t_Null: 2577 if (!Ty->isPointerTy()) 2578 return Error(ID.Loc, "null must be a pointer type"); 2579 V = ConstantPointerNull::get(cast<PointerType>(Ty)); 2580 return false; 2581 case ValID::t_Undef: 2582 // FIXME: LabelTy should not be a first-class type. 2583 if ((!Ty->isFirstClassType() || Ty->isLabelTy()) && 2584 !Ty->isOpaqueTy()) 2585 return Error(ID.Loc, "invalid type for undef constant"); 2586 V = UndefValue::get(Ty); 2587 return false; 2588 case ValID::t_EmptyArray: 2589 if (!Ty->isArrayTy() || cast<ArrayType>(Ty)->getNumElements() != 0) 2590 return Error(ID.Loc, "invalid empty array initializer"); 2591 V = UndefValue::get(Ty); 2592 return false; 2593 case ValID::t_Zero: 2594 // FIXME: LabelTy should not be a first-class type. 2595 if (!Ty->isFirstClassType() || Ty->isLabelTy()) 2596 return Error(ID.Loc, "invalid type for null constant"); 2597 V = Constant::getNullValue(Ty); 2598 return false; 2599 case ValID::t_Constant: 2600 if (ID.ConstantVal->getType() != Ty) { 2601 // Allow a constant struct with a single member to be converted 2602 // to a union, if the union has a member which is the same type 2603 // as the struct member. 2604 if (const UnionType* utype = dyn_cast<UnionType>(Ty)) { 2605 return ParseUnionValue(utype, ID, V); 2606 } 2607 2608 return Error(ID.Loc, "constant expression type mismatch"); 2609 } 2610 2611 V = ID.ConstantVal; 2612 return false; 2613 } 2614} 2615 2616bool LLParser::ParseValue(const Type *Ty, Value *&V, PerFunctionState &PFS) { 2617 V = 0; 2618 ValID ID; 2619 return ParseValID(ID, &PFS) || 2620 ConvertValIDToValue(Ty, ID, V, &PFS); 2621} 2622 2623bool LLParser::ParseTypeAndValue(Value *&V, PerFunctionState &PFS) { 2624 PATypeHolder T(Type::getVoidTy(Context)); 2625 return ParseType(T) || 2626 ParseValue(T, V, PFS); 2627} 2628 2629bool LLParser::ParseTypeAndBasicBlock(BasicBlock *&BB, LocTy &Loc, 2630 PerFunctionState &PFS) { 2631 Value *V; 2632 Loc = Lex.getLoc(); 2633 if (ParseTypeAndValue(V, PFS)) return true; 2634 if (!isa<BasicBlock>(V)) 2635 return Error(Loc, "expected a basic block"); 2636 BB = cast<BasicBlock>(V); 2637 return false; 2638} 2639 2640bool LLParser::ParseUnionValue(const UnionType* utype, ValID &ID, Value *&V) { 2641 if (const StructType* stype = dyn_cast<StructType>(ID.ConstantVal->getType())) { 2642 if (stype->getNumContainedTypes() != 1) 2643 return Error(ID.Loc, "constant expression type mismatch"); 2644 int index = utype->getElementTypeIndex(stype->getContainedType(0)); 2645 if (index < 0) 2646 return Error(ID.Loc, "initializer type is not a member of the union"); 2647 2648 V = ConstantUnion::get( 2649 utype, cast<Constant>(ID.ConstantVal->getOperand(0))); 2650 return false; 2651 } 2652 2653 return Error(ID.Loc, "constant expression type mismatch"); 2654} 2655 2656 2657/// FunctionHeader 2658/// ::= OptionalLinkage OptionalVisibility OptionalCallingConv OptRetAttrs 2659/// Type GlobalName '(' ArgList ')' OptFuncAttrs OptSection 2660/// OptionalAlign OptGC 2661bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) { 2662 // Parse the linkage. 2663 LocTy LinkageLoc = Lex.getLoc(); 2664 unsigned Linkage; 2665 2666 unsigned Visibility, RetAttrs; 2667 CallingConv::ID CC; 2668 PATypeHolder RetType(Type::getVoidTy(Context)); 2669 LocTy RetTypeLoc = Lex.getLoc(); 2670 if (ParseOptionalLinkage(Linkage) || 2671 ParseOptionalVisibility(Visibility) || 2672 ParseOptionalCallingConv(CC) || 2673 ParseOptionalAttrs(RetAttrs, 1) || 2674 ParseType(RetType, RetTypeLoc, true /*void allowed*/)) 2675 return true; 2676 2677 // Verify that the linkage is ok. 2678 switch ((GlobalValue::LinkageTypes)Linkage) { 2679 case GlobalValue::ExternalLinkage: 2680 break; // always ok. 2681 case GlobalValue::DLLImportLinkage: 2682 case GlobalValue::ExternalWeakLinkage: 2683 if (isDefine) 2684 return Error(LinkageLoc, "invalid linkage for function definition"); 2685 break; 2686 case GlobalValue::PrivateLinkage: 2687 case GlobalValue::LinkerPrivateLinkage: 2688 case GlobalValue::InternalLinkage: 2689 case GlobalValue::AvailableExternallyLinkage: 2690 case GlobalValue::LinkOnceAnyLinkage: 2691 case GlobalValue::LinkOnceODRLinkage: 2692 case GlobalValue::WeakAnyLinkage: 2693 case GlobalValue::WeakODRLinkage: 2694 case GlobalValue::DLLExportLinkage: 2695 if (!isDefine) 2696 return Error(LinkageLoc, "invalid linkage for function declaration"); 2697 break; 2698 case GlobalValue::AppendingLinkage: 2699 case GlobalValue::CommonLinkage: 2700 return Error(LinkageLoc, "invalid function linkage type"); 2701 } 2702 2703 if (!FunctionType::isValidReturnType(RetType) || 2704 RetType->isOpaqueTy()) 2705 return Error(RetTypeLoc, "invalid function return type"); 2706 2707 LocTy NameLoc = Lex.getLoc(); 2708 2709 std::string FunctionName; 2710 if (Lex.getKind() == lltok::GlobalVar) { 2711 FunctionName = Lex.getStrVal(); 2712 } else if (Lex.getKind() == lltok::GlobalID) { // @42 is ok. 2713 unsigned NameID = Lex.getUIntVal(); 2714 2715 if (NameID != NumberedVals.size()) 2716 return TokError("function expected to be numbered '%" + 2717 utostr(NumberedVals.size()) + "'"); 2718 } else { 2719 return TokError("expected function name"); 2720 } 2721 2722 Lex.Lex(); 2723 2724 if (Lex.getKind() != lltok::lparen) 2725 return TokError("expected '(' in function argument list"); 2726 2727 std::vector<ArgInfo> ArgList; 2728 bool isVarArg; 2729 unsigned FuncAttrs; 2730 std::string Section; 2731 unsigned Alignment; 2732 std::string GC; 2733 2734 if (ParseArgumentList(ArgList, isVarArg, false) || 2735 ParseOptionalAttrs(FuncAttrs, 2) || 2736 (EatIfPresent(lltok::kw_section) && 2737 ParseStringConstant(Section)) || 2738 ParseOptionalAlignment(Alignment) || 2739 (EatIfPresent(lltok::kw_gc) && 2740 ParseStringConstant(GC))) 2741 return true; 2742 2743 // If the alignment was parsed as an attribute, move to the alignment field. 2744 if (FuncAttrs & Attribute::Alignment) { 2745 Alignment = Attribute::getAlignmentFromAttrs(FuncAttrs); 2746 FuncAttrs &= ~Attribute::Alignment; 2747 } 2748 2749 // Okay, if we got here, the function is syntactically valid. Convert types 2750 // and do semantic checks. 2751 std::vector<const Type*> ParamTypeList; 2752 SmallVector<AttributeWithIndex, 8> Attrs; 2753 // FIXME : In 3.0, stop accepting zext, sext and inreg as optional function 2754 // attributes. 2755 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 2756 if (FuncAttrs & ObsoleteFuncAttrs) { 2757 RetAttrs |= FuncAttrs & ObsoleteFuncAttrs; 2758 FuncAttrs &= ~ObsoleteFuncAttrs; 2759 } 2760 2761 if (RetAttrs != Attribute::None) 2762 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 2763 2764 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 2765 ParamTypeList.push_back(ArgList[i].Type); 2766 if (ArgList[i].Attrs != Attribute::None) 2767 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 2768 } 2769 2770 if (FuncAttrs != Attribute::None) 2771 Attrs.push_back(AttributeWithIndex::get(~0, FuncAttrs)); 2772 2773 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 2774 2775 if (PAL.paramHasAttr(1, Attribute::StructRet) && !RetType->isVoidTy()) 2776 return Error(RetTypeLoc, "functions with 'sret' argument must return void"); 2777 2778 const FunctionType *FT = 2779 FunctionType::get(RetType, ParamTypeList, isVarArg); 2780 const PointerType *PFT = PointerType::getUnqual(FT); 2781 2782 Fn = 0; 2783 if (!FunctionName.empty()) { 2784 // If this was a definition of a forward reference, remove the definition 2785 // from the forward reference table and fill in the forward ref. 2786 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator FRVI = 2787 ForwardRefVals.find(FunctionName); 2788 if (FRVI != ForwardRefVals.end()) { 2789 Fn = M->getFunction(FunctionName); 2790 if (Fn->getType() != PFT) 2791 return Error(FRVI->second.second, "invalid forward reference to " 2792 "function '" + FunctionName + "' with wrong type!"); 2793 2794 ForwardRefVals.erase(FRVI); 2795 } else if ((Fn = M->getFunction(FunctionName))) { 2796 // If this function already exists in the symbol table, then it is 2797 // multiply defined. We accept a few cases for old backwards compat. 2798 // FIXME: Remove this stuff for LLVM 3.0. 2799 if (Fn->getType() != PFT || Fn->getAttributes() != PAL || 2800 (!Fn->isDeclaration() && isDefine)) { 2801 // If the redefinition has different type or different attributes, 2802 // reject it. If both have bodies, reject it. 2803 return Error(NameLoc, "invalid redefinition of function '" + 2804 FunctionName + "'"); 2805 } else if (Fn->isDeclaration()) { 2806 // Make sure to strip off any argument names so we can't get conflicts. 2807 for (Function::arg_iterator AI = Fn->arg_begin(), AE = Fn->arg_end(); 2808 AI != AE; ++AI) 2809 AI->setName(""); 2810 } 2811 } else if (M->getNamedValue(FunctionName)) { 2812 return Error(NameLoc, "redefinition of function '@" + FunctionName + "'"); 2813 } 2814 2815 } else { 2816 // If this is a definition of a forward referenced function, make sure the 2817 // types agree. 2818 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator I 2819 = ForwardRefValIDs.find(NumberedVals.size()); 2820 if (I != ForwardRefValIDs.end()) { 2821 Fn = cast<Function>(I->second.first); 2822 if (Fn->getType() != PFT) 2823 return Error(NameLoc, "type of definition and forward reference of '@" + 2824 utostr(NumberedVals.size()) +"' disagree"); 2825 ForwardRefValIDs.erase(I); 2826 } 2827 } 2828 2829 if (Fn == 0) 2830 Fn = Function::Create(FT, GlobalValue::ExternalLinkage, FunctionName, M); 2831 else // Move the forward-reference to the correct spot in the module. 2832 M->getFunctionList().splice(M->end(), M->getFunctionList(), Fn); 2833 2834 if (FunctionName.empty()) 2835 NumberedVals.push_back(Fn); 2836 2837 Fn->setLinkage((GlobalValue::LinkageTypes)Linkage); 2838 Fn->setVisibility((GlobalValue::VisibilityTypes)Visibility); 2839 Fn->setCallingConv(CC); 2840 Fn->setAttributes(PAL); 2841 Fn->setAlignment(Alignment); 2842 Fn->setSection(Section); 2843 if (!GC.empty()) Fn->setGC(GC.c_str()); 2844 2845 // Add all of the arguments we parsed to the function. 2846 Function::arg_iterator ArgIt = Fn->arg_begin(); 2847 for (unsigned i = 0, e = ArgList.size(); i != e; ++i, ++ArgIt) { 2848 // If we run out of arguments in the Function prototype, exit early. 2849 // FIXME: REMOVE THIS IN LLVM 3.0, this is just for the mismatch case above. 2850 if (ArgIt == Fn->arg_end()) break; 2851 2852 // If the argument has a name, insert it into the argument symbol table. 2853 if (ArgList[i].Name.empty()) continue; 2854 2855 // Set the name, if it conflicted, it will be auto-renamed. 2856 ArgIt->setName(ArgList[i].Name); 2857 2858 if (ArgIt->getNameStr() != ArgList[i].Name) 2859 return Error(ArgList[i].Loc, "redefinition of argument '%" + 2860 ArgList[i].Name + "'"); 2861 } 2862 2863 return false; 2864} 2865 2866 2867/// ParseFunctionBody 2868/// ::= '{' BasicBlock+ '}' 2869/// ::= 'begin' BasicBlock+ 'end' // FIXME: remove in LLVM 3.0 2870/// 2871bool LLParser::ParseFunctionBody(Function &Fn) { 2872 if (Lex.getKind() != lltok::lbrace && Lex.getKind() != lltok::kw_begin) 2873 return TokError("expected '{' in function body"); 2874 Lex.Lex(); // eat the {. 2875 2876 int FunctionNumber = -1; 2877 if (!Fn.hasName()) FunctionNumber = NumberedVals.size()-1; 2878 2879 PerFunctionState PFS(*this, Fn, FunctionNumber); 2880 2881 // We need at least one basic block. 2882 if (Lex.getKind() == lltok::rbrace || Lex.getKind() == lltok::kw_end) 2883 return TokError("function body requires at least one basic block"); 2884 2885 while (Lex.getKind() != lltok::rbrace && Lex.getKind() != lltok::kw_end) 2886 if (ParseBasicBlock(PFS)) return true; 2887 2888 // Eat the }. 2889 Lex.Lex(); 2890 2891 // Verify function is ok. 2892 return PFS.FinishFunction(); 2893} 2894 2895/// ParseBasicBlock 2896/// ::= LabelStr? Instruction* 2897bool LLParser::ParseBasicBlock(PerFunctionState &PFS) { 2898 // If this basic block starts out with a name, remember it. 2899 std::string Name; 2900 LocTy NameLoc = Lex.getLoc(); 2901 if (Lex.getKind() == lltok::LabelStr) { 2902 Name = Lex.getStrVal(); 2903 Lex.Lex(); 2904 } 2905 2906 BasicBlock *BB = PFS.DefineBB(Name, NameLoc); 2907 if (BB == 0) return true; 2908 2909 std::string NameStr; 2910 2911 // Parse the instructions in this block until we get a terminator. 2912 Instruction *Inst; 2913 SmallVector<std::pair<unsigned, MDNode *>, 4> MetadataOnInst; 2914 do { 2915 // This instruction may have three possibilities for a name: a) none 2916 // specified, b) name specified "%foo =", c) number specified: "%4 =". 2917 LocTy NameLoc = Lex.getLoc(); 2918 int NameID = -1; 2919 NameStr = ""; 2920 2921 if (Lex.getKind() == lltok::LocalVarID) { 2922 NameID = Lex.getUIntVal(); 2923 Lex.Lex(); 2924 if (ParseToken(lltok::equal, "expected '=' after instruction id")) 2925 return true; 2926 } else if (Lex.getKind() == lltok::LocalVar || 2927 // FIXME: REMOVE IN LLVM 3.0 2928 Lex.getKind() == lltok::StringConstant) { 2929 NameStr = Lex.getStrVal(); 2930 Lex.Lex(); 2931 if (ParseToken(lltok::equal, "expected '=' after instruction name")) 2932 return true; 2933 } 2934 2935 switch (ParseInstruction(Inst, BB, PFS)) { 2936 default: assert(0 && "Unknown ParseInstruction result!"); 2937 case InstError: return true; 2938 case InstNormal: 2939 BB->getInstList().push_back(Inst); 2940 2941 // With a normal result, we check to see if the instruction is followed by 2942 // a comma and metadata. 2943 if (EatIfPresent(lltok::comma)) 2944 if (ParseInstructionMetadata(Inst)) 2945 return true; 2946 break; 2947 case InstExtraComma: 2948 BB->getInstList().push_back(Inst); 2949 2950 // If the instruction parser ate an extra comma at the end of it, it 2951 // *must* be followed by metadata. 2952 if (ParseInstructionMetadata(Inst)) 2953 return true; 2954 break; 2955 } 2956 2957 // Set the name on the instruction. 2958 if (PFS.SetInstName(NameID, NameStr, NameLoc, Inst)) return true; 2959 } while (!isa<TerminatorInst>(Inst)); 2960 2961 return false; 2962} 2963 2964//===----------------------------------------------------------------------===// 2965// Instruction Parsing. 2966//===----------------------------------------------------------------------===// 2967 2968/// ParseInstruction - Parse one of the many different instructions. 2969/// 2970int LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB, 2971 PerFunctionState &PFS) { 2972 lltok::Kind Token = Lex.getKind(); 2973 if (Token == lltok::Eof) 2974 return TokError("found end of file when expecting more instructions"); 2975 LocTy Loc = Lex.getLoc(); 2976 unsigned KeywordVal = Lex.getUIntVal(); 2977 Lex.Lex(); // Eat the keyword. 2978 2979 switch (Token) { 2980 default: return Error(Loc, "expected instruction opcode"); 2981 // Terminator Instructions. 2982 case lltok::kw_unwind: Inst = new UnwindInst(Context); return false; 2983 case lltok::kw_unreachable: Inst = new UnreachableInst(Context); return false; 2984 case lltok::kw_ret: return ParseRet(Inst, BB, PFS); 2985 case lltok::kw_br: return ParseBr(Inst, PFS); 2986 case lltok::kw_switch: return ParseSwitch(Inst, PFS); 2987 case lltok::kw_indirectbr: return ParseIndirectBr(Inst, PFS); 2988 case lltok::kw_invoke: return ParseInvoke(Inst, PFS); 2989 // Binary Operators. 2990 case lltok::kw_add: 2991 case lltok::kw_sub: 2992 case lltok::kw_mul: { 2993 bool NUW = false; 2994 bool NSW = false; 2995 LocTy ModifierLoc = Lex.getLoc(); 2996 if (EatIfPresent(lltok::kw_nuw)) 2997 NUW = true; 2998 if (EatIfPresent(lltok::kw_nsw)) { 2999 NSW = true; 3000 if (EatIfPresent(lltok::kw_nuw)) 3001 NUW = true; 3002 } 3003 // API compatibility: Accept either integer or floating-point types. 3004 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 0); 3005 if (!Result) { 3006 if (!Inst->getType()->isIntOrIntVectorTy()) { 3007 if (NUW) 3008 return Error(ModifierLoc, "nuw only applies to integer operations"); 3009 if (NSW) 3010 return Error(ModifierLoc, "nsw only applies to integer operations"); 3011 } 3012 if (NUW) 3013 cast<BinaryOperator>(Inst)->setHasNoUnsignedWrap(true); 3014 if (NSW) 3015 cast<BinaryOperator>(Inst)->setHasNoSignedWrap(true); 3016 } 3017 return Result; 3018 } 3019 case lltok::kw_fadd: 3020 case lltok::kw_fsub: 3021 case lltok::kw_fmul: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 3022 3023 case lltok::kw_sdiv: { 3024 bool Exact = false; 3025 if (EatIfPresent(lltok::kw_exact)) 3026 Exact = true; 3027 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 1); 3028 if (!Result) 3029 if (Exact) 3030 cast<BinaryOperator>(Inst)->setIsExact(true); 3031 return Result; 3032 } 3033 3034 case lltok::kw_udiv: 3035 case lltok::kw_urem: 3036 case lltok::kw_srem: return ParseArithmetic(Inst, PFS, KeywordVal, 1); 3037 case lltok::kw_fdiv: 3038 case lltok::kw_frem: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 3039 case lltok::kw_shl: 3040 case lltok::kw_lshr: 3041 case lltok::kw_ashr: 3042 case lltok::kw_and: 3043 case lltok::kw_or: 3044 case lltok::kw_xor: return ParseLogical(Inst, PFS, KeywordVal); 3045 case lltok::kw_icmp: 3046 case lltok::kw_fcmp: return ParseCompare(Inst, PFS, KeywordVal); 3047 // Casts. 3048 case lltok::kw_trunc: 3049 case lltok::kw_zext: 3050 case lltok::kw_sext: 3051 case lltok::kw_fptrunc: 3052 case lltok::kw_fpext: 3053 case lltok::kw_bitcast: 3054 case lltok::kw_uitofp: 3055 case lltok::kw_sitofp: 3056 case lltok::kw_fptoui: 3057 case lltok::kw_fptosi: 3058 case lltok::kw_inttoptr: 3059 case lltok::kw_ptrtoint: return ParseCast(Inst, PFS, KeywordVal); 3060 // Other. 3061 case lltok::kw_select: return ParseSelect(Inst, PFS); 3062 case lltok::kw_va_arg: return ParseVA_Arg(Inst, PFS); 3063 case lltok::kw_extractelement: return ParseExtractElement(Inst, PFS); 3064 case lltok::kw_insertelement: return ParseInsertElement(Inst, PFS); 3065 case lltok::kw_shufflevector: return ParseShuffleVector(Inst, PFS); 3066 case lltok::kw_phi: return ParsePHI(Inst, PFS); 3067 case lltok::kw_call: return ParseCall(Inst, PFS, false); 3068 case lltok::kw_tail: return ParseCall(Inst, PFS, true); 3069 // Memory. 3070 case lltok::kw_alloca: return ParseAlloc(Inst, PFS); 3071 case lltok::kw_malloc: return ParseAlloc(Inst, PFS, BB, false); 3072 case lltok::kw_free: return ParseFree(Inst, PFS, BB); 3073 case lltok::kw_load: return ParseLoad(Inst, PFS, false); 3074 case lltok::kw_store: return ParseStore(Inst, PFS, false); 3075 case lltok::kw_volatile: 3076 if (EatIfPresent(lltok::kw_load)) 3077 return ParseLoad(Inst, PFS, true); 3078 else if (EatIfPresent(lltok::kw_store)) 3079 return ParseStore(Inst, PFS, true); 3080 else 3081 return TokError("expected 'load' or 'store'"); 3082 case lltok::kw_getresult: return ParseGetResult(Inst, PFS); 3083 case lltok::kw_getelementptr: return ParseGetElementPtr(Inst, PFS); 3084 case lltok::kw_extractvalue: return ParseExtractValue(Inst, PFS); 3085 case lltok::kw_insertvalue: return ParseInsertValue(Inst, PFS); 3086 } 3087} 3088 3089/// ParseCmpPredicate - Parse an integer or fp predicate, based on Kind. 3090bool LLParser::ParseCmpPredicate(unsigned &P, unsigned Opc) { 3091 if (Opc == Instruction::FCmp) { 3092 switch (Lex.getKind()) { 3093 default: TokError("expected fcmp predicate (e.g. 'oeq')"); 3094 case lltok::kw_oeq: P = CmpInst::FCMP_OEQ; break; 3095 case lltok::kw_one: P = CmpInst::FCMP_ONE; break; 3096 case lltok::kw_olt: P = CmpInst::FCMP_OLT; break; 3097 case lltok::kw_ogt: P = CmpInst::FCMP_OGT; break; 3098 case lltok::kw_ole: P = CmpInst::FCMP_OLE; break; 3099 case lltok::kw_oge: P = CmpInst::FCMP_OGE; break; 3100 case lltok::kw_ord: P = CmpInst::FCMP_ORD; break; 3101 case lltok::kw_uno: P = CmpInst::FCMP_UNO; break; 3102 case lltok::kw_ueq: P = CmpInst::FCMP_UEQ; break; 3103 case lltok::kw_une: P = CmpInst::FCMP_UNE; break; 3104 case lltok::kw_ult: P = CmpInst::FCMP_ULT; break; 3105 case lltok::kw_ugt: P = CmpInst::FCMP_UGT; break; 3106 case lltok::kw_ule: P = CmpInst::FCMP_ULE; break; 3107 case lltok::kw_uge: P = CmpInst::FCMP_UGE; break; 3108 case lltok::kw_true: P = CmpInst::FCMP_TRUE; break; 3109 case lltok::kw_false: P = CmpInst::FCMP_FALSE; break; 3110 } 3111 } else { 3112 switch (Lex.getKind()) { 3113 default: TokError("expected icmp predicate (e.g. 'eq')"); 3114 case lltok::kw_eq: P = CmpInst::ICMP_EQ; break; 3115 case lltok::kw_ne: P = CmpInst::ICMP_NE; break; 3116 case lltok::kw_slt: P = CmpInst::ICMP_SLT; break; 3117 case lltok::kw_sgt: P = CmpInst::ICMP_SGT; break; 3118 case lltok::kw_sle: P = CmpInst::ICMP_SLE; break; 3119 case lltok::kw_sge: P = CmpInst::ICMP_SGE; break; 3120 case lltok::kw_ult: P = CmpInst::ICMP_ULT; break; 3121 case lltok::kw_ugt: P = CmpInst::ICMP_UGT; break; 3122 case lltok::kw_ule: P = CmpInst::ICMP_ULE; break; 3123 case lltok::kw_uge: P = CmpInst::ICMP_UGE; break; 3124 } 3125 } 3126 Lex.Lex(); 3127 return false; 3128} 3129 3130//===----------------------------------------------------------------------===// 3131// Terminator Instructions. 3132//===----------------------------------------------------------------------===// 3133 3134/// ParseRet - Parse a return instruction. 3135/// ::= 'ret' void (',' !dbg, !1)* 3136/// ::= 'ret' TypeAndValue (',' !dbg, !1)* 3137/// ::= 'ret' TypeAndValue (',' TypeAndValue)+ (',' !dbg, !1)* 3138/// [[obsolete: LLVM 3.0]] 3139int LLParser::ParseRet(Instruction *&Inst, BasicBlock *BB, 3140 PerFunctionState &PFS) { 3141 PATypeHolder Ty(Type::getVoidTy(Context)); 3142 if (ParseType(Ty, true /*void allowed*/)) return true; 3143 3144 if (Ty->isVoidTy()) { 3145 Inst = ReturnInst::Create(Context); 3146 return false; 3147 } 3148 3149 Value *RV; 3150 if (ParseValue(Ty, RV, PFS)) return true; 3151 3152 bool ExtraComma = false; 3153 if (EatIfPresent(lltok::comma)) { 3154 // Parse optional custom metadata, e.g. !dbg 3155 if (Lex.getKind() == lltok::MetadataVar) { 3156 ExtraComma = true; 3157 } else { 3158 // The normal case is one return value. 3159 // FIXME: LLVM 3.0 remove MRV support for 'ret i32 1, i32 2', requiring 3160 // use of 'ret {i32,i32} {i32 1, i32 2}' 3161 SmallVector<Value*, 8> RVs; 3162 RVs.push_back(RV); 3163 3164 do { 3165 // If optional custom metadata, e.g. !dbg is seen then this is the 3166 // end of MRV. 3167 if (Lex.getKind() == lltok::MetadataVar) 3168 break; 3169 if (ParseTypeAndValue(RV, PFS)) return true; 3170 RVs.push_back(RV); 3171 } while (EatIfPresent(lltok::comma)); 3172 3173 RV = UndefValue::get(PFS.getFunction().getReturnType()); 3174 for (unsigned i = 0, e = RVs.size(); i != e; ++i) { 3175 Instruction *I = InsertValueInst::Create(RV, RVs[i], i, "mrv"); 3176 BB->getInstList().push_back(I); 3177 RV = I; 3178 } 3179 } 3180 } 3181 3182 Inst = ReturnInst::Create(Context, RV); 3183 return ExtraComma ? InstExtraComma : InstNormal; 3184} 3185 3186 3187/// ParseBr 3188/// ::= 'br' TypeAndValue 3189/// ::= 'br' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3190bool LLParser::ParseBr(Instruction *&Inst, PerFunctionState &PFS) { 3191 LocTy Loc, Loc2; 3192 Value *Op0; 3193 BasicBlock *Op1, *Op2; 3194 if (ParseTypeAndValue(Op0, Loc, PFS)) return true; 3195 3196 if (BasicBlock *BB = dyn_cast<BasicBlock>(Op0)) { 3197 Inst = BranchInst::Create(BB); 3198 return false; 3199 } 3200 3201 if (Op0->getType() != Type::getInt1Ty(Context)) 3202 return Error(Loc, "branch condition must have 'i1' type"); 3203 3204 if (ParseToken(lltok::comma, "expected ',' after branch condition") || 3205 ParseTypeAndBasicBlock(Op1, Loc, PFS) || 3206 ParseToken(lltok::comma, "expected ',' after true destination") || 3207 ParseTypeAndBasicBlock(Op2, Loc2, PFS)) 3208 return true; 3209 3210 Inst = BranchInst::Create(Op1, Op2, Op0); 3211 return false; 3212} 3213 3214/// ParseSwitch 3215/// Instruction 3216/// ::= 'switch' TypeAndValue ',' TypeAndValue '[' JumpTable ']' 3217/// JumpTable 3218/// ::= (TypeAndValue ',' TypeAndValue)* 3219bool LLParser::ParseSwitch(Instruction *&Inst, PerFunctionState &PFS) { 3220 LocTy CondLoc, BBLoc; 3221 Value *Cond; 3222 BasicBlock *DefaultBB; 3223 if (ParseTypeAndValue(Cond, CondLoc, PFS) || 3224 ParseToken(lltok::comma, "expected ',' after switch condition") || 3225 ParseTypeAndBasicBlock(DefaultBB, BBLoc, PFS) || 3226 ParseToken(lltok::lsquare, "expected '[' with switch table")) 3227 return true; 3228 3229 if (!Cond->getType()->isIntegerTy()) 3230 return Error(CondLoc, "switch condition must have integer type"); 3231 3232 // Parse the jump table pairs. 3233 SmallPtrSet<Value*, 32> SeenCases; 3234 SmallVector<std::pair<ConstantInt*, BasicBlock*>, 32> Table; 3235 while (Lex.getKind() != lltok::rsquare) { 3236 Value *Constant; 3237 BasicBlock *DestBB; 3238 3239 if (ParseTypeAndValue(Constant, CondLoc, PFS) || 3240 ParseToken(lltok::comma, "expected ',' after case value") || 3241 ParseTypeAndBasicBlock(DestBB, PFS)) 3242 return true; 3243 3244 if (!SeenCases.insert(Constant)) 3245 return Error(CondLoc, "duplicate case value in switch"); 3246 if (!isa<ConstantInt>(Constant)) 3247 return Error(CondLoc, "case value is not a constant integer"); 3248 3249 Table.push_back(std::make_pair(cast<ConstantInt>(Constant), DestBB)); 3250 } 3251 3252 Lex.Lex(); // Eat the ']'. 3253 3254 SwitchInst *SI = SwitchInst::Create(Cond, DefaultBB, Table.size()); 3255 for (unsigned i = 0, e = Table.size(); i != e; ++i) 3256 SI->addCase(Table[i].first, Table[i].second); 3257 Inst = SI; 3258 return false; 3259} 3260 3261/// ParseIndirectBr 3262/// Instruction 3263/// ::= 'indirectbr' TypeAndValue ',' '[' LabelList ']' 3264bool LLParser::ParseIndirectBr(Instruction *&Inst, PerFunctionState &PFS) { 3265 LocTy AddrLoc; 3266 Value *Address; 3267 if (ParseTypeAndValue(Address, AddrLoc, PFS) || 3268 ParseToken(lltok::comma, "expected ',' after indirectbr address") || 3269 ParseToken(lltok::lsquare, "expected '[' with indirectbr")) 3270 return true; 3271 3272 if (!Address->getType()->isPointerTy()) 3273 return Error(AddrLoc, "indirectbr address must have pointer type"); 3274 3275 // Parse the destination list. 3276 SmallVector<BasicBlock*, 16> DestList; 3277 3278 if (Lex.getKind() != lltok::rsquare) { 3279 BasicBlock *DestBB; 3280 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3281 return true; 3282 DestList.push_back(DestBB); 3283 3284 while (EatIfPresent(lltok::comma)) { 3285 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3286 return true; 3287 DestList.push_back(DestBB); 3288 } 3289 } 3290 3291 if (ParseToken(lltok::rsquare, "expected ']' at end of block list")) 3292 return true; 3293 3294 IndirectBrInst *IBI = IndirectBrInst::Create(Address, DestList.size()); 3295 for (unsigned i = 0, e = DestList.size(); i != e; ++i) 3296 IBI->addDestination(DestList[i]); 3297 Inst = IBI; 3298 return false; 3299} 3300 3301 3302/// ParseInvoke 3303/// ::= 'invoke' OptionalCallingConv OptionalAttrs Type Value ParamList 3304/// OptionalAttrs 'to' TypeAndValue 'unwind' TypeAndValue 3305bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) { 3306 LocTy CallLoc = Lex.getLoc(); 3307 unsigned RetAttrs, FnAttrs; 3308 CallingConv::ID CC; 3309 PATypeHolder RetType(Type::getVoidTy(Context)); 3310 LocTy RetTypeLoc; 3311 ValID CalleeID; 3312 SmallVector<ParamInfo, 16> ArgList; 3313 3314 BasicBlock *NormalBB, *UnwindBB; 3315 if (ParseOptionalCallingConv(CC) || 3316 ParseOptionalAttrs(RetAttrs, 1) || 3317 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3318 ParseValID(CalleeID) || 3319 ParseParameterList(ArgList, PFS) || 3320 ParseOptionalAttrs(FnAttrs, 2) || 3321 ParseToken(lltok::kw_to, "expected 'to' in invoke") || 3322 ParseTypeAndBasicBlock(NormalBB, PFS) || 3323 ParseToken(lltok::kw_unwind, "expected 'unwind' in invoke") || 3324 ParseTypeAndBasicBlock(UnwindBB, PFS)) 3325 return true; 3326 3327 // If RetType is a non-function pointer type, then this is the short syntax 3328 // for the call, which means that RetType is just the return type. Infer the 3329 // rest of the function argument types from the arguments that are present. 3330 const PointerType *PFTy = 0; 3331 const FunctionType *Ty = 0; 3332 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3333 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3334 // Pull out the types of all of the arguments... 3335 std::vector<const Type*> ParamTypes; 3336 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3337 ParamTypes.push_back(ArgList[i].V->getType()); 3338 3339 if (!FunctionType::isValidReturnType(RetType)) 3340 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3341 3342 Ty = FunctionType::get(RetType, ParamTypes, false); 3343 PFTy = PointerType::getUnqual(Ty); 3344 } 3345 3346 // Look up the callee. 3347 Value *Callee; 3348 if (ConvertValIDToValue(PFTy, CalleeID, Callee, &PFS)) return true; 3349 3350 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 3351 // function attributes. 3352 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 3353 if (FnAttrs & ObsoleteFuncAttrs) { 3354 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 3355 FnAttrs &= ~ObsoleteFuncAttrs; 3356 } 3357 3358 // Set up the Attributes for the function. 3359 SmallVector<AttributeWithIndex, 8> Attrs; 3360 if (RetAttrs != Attribute::None) 3361 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3362 3363 SmallVector<Value*, 8> Args; 3364 3365 // Loop through FunctionType's arguments and ensure they are specified 3366 // correctly. Also, gather any parameter attributes. 3367 FunctionType::param_iterator I = Ty->param_begin(); 3368 FunctionType::param_iterator E = Ty->param_end(); 3369 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3370 const Type *ExpectedTy = 0; 3371 if (I != E) { 3372 ExpectedTy = *I++; 3373 } else if (!Ty->isVarArg()) { 3374 return Error(ArgList[i].Loc, "too many arguments specified"); 3375 } 3376 3377 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3378 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3379 ExpectedTy->getDescription() + "'"); 3380 Args.push_back(ArgList[i].V); 3381 if (ArgList[i].Attrs != Attribute::None) 3382 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3383 } 3384 3385 if (I != E) 3386 return Error(CallLoc, "not enough parameters specified for call"); 3387 3388 if (FnAttrs != Attribute::None) 3389 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3390 3391 // Finish off the Attributes and check them 3392 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3393 3394 InvokeInst *II = InvokeInst::Create(Callee, NormalBB, UnwindBB, 3395 Args.begin(), Args.end()); 3396 II->setCallingConv(CC); 3397 II->setAttributes(PAL); 3398 Inst = II; 3399 return false; 3400} 3401 3402 3403 3404//===----------------------------------------------------------------------===// 3405// Binary Operators. 3406//===----------------------------------------------------------------------===// 3407 3408/// ParseArithmetic 3409/// ::= ArithmeticOps TypeAndValue ',' Value 3410/// 3411/// If OperandType is 0, then any FP or integer operand is allowed. If it is 1, 3412/// then any integer operand is allowed, if it is 2, any fp operand is allowed. 3413bool LLParser::ParseArithmetic(Instruction *&Inst, PerFunctionState &PFS, 3414 unsigned Opc, unsigned OperandType) { 3415 LocTy Loc; Value *LHS, *RHS; 3416 if (ParseTypeAndValue(LHS, Loc, PFS) || 3417 ParseToken(lltok::comma, "expected ',' in arithmetic operation") || 3418 ParseValue(LHS->getType(), RHS, PFS)) 3419 return true; 3420 3421 bool Valid; 3422 switch (OperandType) { 3423 default: llvm_unreachable("Unknown operand type!"); 3424 case 0: // int or FP. 3425 Valid = LHS->getType()->isIntOrIntVectorTy() || 3426 LHS->getType()->isFPOrFPVectorTy(); 3427 break; 3428 case 1: Valid = LHS->getType()->isIntOrIntVectorTy(); break; 3429 case 2: Valid = LHS->getType()->isFPOrFPVectorTy(); break; 3430 } 3431 3432 if (!Valid) 3433 return Error(Loc, "invalid operand type for instruction"); 3434 3435 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3436 return false; 3437} 3438 3439/// ParseLogical 3440/// ::= ArithmeticOps TypeAndValue ',' Value { 3441bool LLParser::ParseLogical(Instruction *&Inst, PerFunctionState &PFS, 3442 unsigned Opc) { 3443 LocTy Loc; Value *LHS, *RHS; 3444 if (ParseTypeAndValue(LHS, Loc, PFS) || 3445 ParseToken(lltok::comma, "expected ',' in logical operation") || 3446 ParseValue(LHS->getType(), RHS, PFS)) 3447 return true; 3448 3449 if (!LHS->getType()->isIntOrIntVectorTy()) 3450 return Error(Loc,"instruction requires integer or integer vector operands"); 3451 3452 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3453 return false; 3454} 3455 3456 3457/// ParseCompare 3458/// ::= 'icmp' IPredicates TypeAndValue ',' Value 3459/// ::= 'fcmp' FPredicates TypeAndValue ',' Value 3460bool LLParser::ParseCompare(Instruction *&Inst, PerFunctionState &PFS, 3461 unsigned Opc) { 3462 // Parse the integer/fp comparison predicate. 3463 LocTy Loc; 3464 unsigned Pred; 3465 Value *LHS, *RHS; 3466 if (ParseCmpPredicate(Pred, Opc) || 3467 ParseTypeAndValue(LHS, Loc, PFS) || 3468 ParseToken(lltok::comma, "expected ',' after compare value") || 3469 ParseValue(LHS->getType(), RHS, PFS)) 3470 return true; 3471 3472 if (Opc == Instruction::FCmp) { 3473 if (!LHS->getType()->isFPOrFPVectorTy()) 3474 return Error(Loc, "fcmp requires floating point operands"); 3475 Inst = new FCmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3476 } else { 3477 assert(Opc == Instruction::ICmp && "Unknown opcode for CmpInst!"); 3478 if (!LHS->getType()->isIntOrIntVectorTy() && 3479 !LHS->getType()->isPointerTy()) 3480 return Error(Loc, "icmp requires integer operands"); 3481 Inst = new ICmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3482 } 3483 return false; 3484} 3485 3486//===----------------------------------------------------------------------===// 3487// Other Instructions. 3488//===----------------------------------------------------------------------===// 3489 3490 3491/// ParseCast 3492/// ::= CastOpc TypeAndValue 'to' Type 3493bool LLParser::ParseCast(Instruction *&Inst, PerFunctionState &PFS, 3494 unsigned Opc) { 3495 LocTy Loc; Value *Op; 3496 PATypeHolder DestTy(Type::getVoidTy(Context)); 3497 if (ParseTypeAndValue(Op, Loc, PFS) || 3498 ParseToken(lltok::kw_to, "expected 'to' after cast value") || 3499 ParseType(DestTy)) 3500 return true; 3501 3502 if (!CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy)) { 3503 CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy); 3504 return Error(Loc, "invalid cast opcode for cast from '" + 3505 Op->getType()->getDescription() + "' to '" + 3506 DestTy->getDescription() + "'"); 3507 } 3508 Inst = CastInst::Create((Instruction::CastOps)Opc, Op, DestTy); 3509 return false; 3510} 3511 3512/// ParseSelect 3513/// ::= 'select' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3514bool LLParser::ParseSelect(Instruction *&Inst, PerFunctionState &PFS) { 3515 LocTy Loc; 3516 Value *Op0, *Op1, *Op2; 3517 if (ParseTypeAndValue(Op0, Loc, PFS) || 3518 ParseToken(lltok::comma, "expected ',' after select condition") || 3519 ParseTypeAndValue(Op1, PFS) || 3520 ParseToken(lltok::comma, "expected ',' after select value") || 3521 ParseTypeAndValue(Op2, PFS)) 3522 return true; 3523 3524 if (const char *Reason = SelectInst::areInvalidOperands(Op0, Op1, Op2)) 3525 return Error(Loc, Reason); 3526 3527 Inst = SelectInst::Create(Op0, Op1, Op2); 3528 return false; 3529} 3530 3531/// ParseVA_Arg 3532/// ::= 'va_arg' TypeAndValue ',' Type 3533bool LLParser::ParseVA_Arg(Instruction *&Inst, PerFunctionState &PFS) { 3534 Value *Op; 3535 PATypeHolder EltTy(Type::getVoidTy(Context)); 3536 LocTy TypeLoc; 3537 if (ParseTypeAndValue(Op, PFS) || 3538 ParseToken(lltok::comma, "expected ',' after vaarg operand") || 3539 ParseType(EltTy, TypeLoc)) 3540 return true; 3541 3542 if (!EltTy->isFirstClassType()) 3543 return Error(TypeLoc, "va_arg requires operand with first class type"); 3544 3545 Inst = new VAArgInst(Op, EltTy); 3546 return false; 3547} 3548 3549/// ParseExtractElement 3550/// ::= 'extractelement' TypeAndValue ',' TypeAndValue 3551bool LLParser::ParseExtractElement(Instruction *&Inst, PerFunctionState &PFS) { 3552 LocTy Loc; 3553 Value *Op0, *Op1; 3554 if (ParseTypeAndValue(Op0, Loc, PFS) || 3555 ParseToken(lltok::comma, "expected ',' after extract value") || 3556 ParseTypeAndValue(Op1, PFS)) 3557 return true; 3558 3559 if (!ExtractElementInst::isValidOperands(Op0, Op1)) 3560 return Error(Loc, "invalid extractelement operands"); 3561 3562 Inst = ExtractElementInst::Create(Op0, Op1); 3563 return false; 3564} 3565 3566/// ParseInsertElement 3567/// ::= 'insertelement' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3568bool LLParser::ParseInsertElement(Instruction *&Inst, PerFunctionState &PFS) { 3569 LocTy Loc; 3570 Value *Op0, *Op1, *Op2; 3571 if (ParseTypeAndValue(Op0, Loc, PFS) || 3572 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3573 ParseTypeAndValue(Op1, PFS) || 3574 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3575 ParseTypeAndValue(Op2, PFS)) 3576 return true; 3577 3578 if (!InsertElementInst::isValidOperands(Op0, Op1, Op2)) 3579 return Error(Loc, "invalid insertelement operands"); 3580 3581 Inst = InsertElementInst::Create(Op0, Op1, Op2); 3582 return false; 3583} 3584 3585/// ParseShuffleVector 3586/// ::= 'shufflevector' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3587bool LLParser::ParseShuffleVector(Instruction *&Inst, PerFunctionState &PFS) { 3588 LocTy Loc; 3589 Value *Op0, *Op1, *Op2; 3590 if (ParseTypeAndValue(Op0, Loc, PFS) || 3591 ParseToken(lltok::comma, "expected ',' after shuffle mask") || 3592 ParseTypeAndValue(Op1, PFS) || 3593 ParseToken(lltok::comma, "expected ',' after shuffle value") || 3594 ParseTypeAndValue(Op2, PFS)) 3595 return true; 3596 3597 if (!ShuffleVectorInst::isValidOperands(Op0, Op1, Op2)) 3598 return Error(Loc, "invalid extractelement operands"); 3599 3600 Inst = new ShuffleVectorInst(Op0, Op1, Op2); 3601 return false; 3602} 3603 3604/// ParsePHI 3605/// ::= 'phi' Type '[' Value ',' Value ']' (',' '[' Value ',' Value ']')* 3606int LLParser::ParsePHI(Instruction *&Inst, PerFunctionState &PFS) { 3607 PATypeHolder Ty(Type::getVoidTy(Context)); 3608 Value *Op0, *Op1; 3609 LocTy TypeLoc = Lex.getLoc(); 3610 3611 if (ParseType(Ty) || 3612 ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3613 ParseValue(Ty, Op0, PFS) || 3614 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3615 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3616 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3617 return true; 3618 3619 bool AteExtraComma = false; 3620 SmallVector<std::pair<Value*, BasicBlock*>, 16> PHIVals; 3621 while (1) { 3622 PHIVals.push_back(std::make_pair(Op0, cast<BasicBlock>(Op1))); 3623 3624 if (!EatIfPresent(lltok::comma)) 3625 break; 3626 3627 if (Lex.getKind() == lltok::MetadataVar) { 3628 AteExtraComma = true; 3629 break; 3630 } 3631 3632 if (ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3633 ParseValue(Ty, Op0, PFS) || 3634 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3635 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3636 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3637 return true; 3638 } 3639 3640 if (!Ty->isFirstClassType()) 3641 return Error(TypeLoc, "phi node must have first class type"); 3642 3643 PHINode *PN = PHINode::Create(Ty); 3644 PN->reserveOperandSpace(PHIVals.size()); 3645 for (unsigned i = 0, e = PHIVals.size(); i != e; ++i) 3646 PN->addIncoming(PHIVals[i].first, PHIVals[i].second); 3647 Inst = PN; 3648 return AteExtraComma ? InstExtraComma : InstNormal; 3649} 3650 3651/// ParseCall 3652/// ::= 'tail'? 'call' OptionalCallingConv OptionalAttrs Type Value 3653/// ParameterList OptionalAttrs 3654bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS, 3655 bool isTail) { 3656 unsigned RetAttrs, FnAttrs; 3657 CallingConv::ID CC; 3658 PATypeHolder RetType(Type::getVoidTy(Context)); 3659 LocTy RetTypeLoc; 3660 ValID CalleeID; 3661 SmallVector<ParamInfo, 16> ArgList; 3662 LocTy CallLoc = Lex.getLoc(); 3663 3664 if ((isTail && ParseToken(lltok::kw_call, "expected 'tail call'")) || 3665 ParseOptionalCallingConv(CC) || 3666 ParseOptionalAttrs(RetAttrs, 1) || 3667 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3668 ParseValID(CalleeID) || 3669 ParseParameterList(ArgList, PFS) || 3670 ParseOptionalAttrs(FnAttrs, 2)) 3671 return true; 3672 3673 // If RetType is a non-function pointer type, then this is the short syntax 3674 // for the call, which means that RetType is just the return type. Infer the 3675 // rest of the function argument types from the arguments that are present. 3676 const PointerType *PFTy = 0; 3677 const FunctionType *Ty = 0; 3678 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3679 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3680 // Pull out the types of all of the arguments... 3681 std::vector<const Type*> ParamTypes; 3682 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3683 ParamTypes.push_back(ArgList[i].V->getType()); 3684 3685 if (!FunctionType::isValidReturnType(RetType)) 3686 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3687 3688 Ty = FunctionType::get(RetType, ParamTypes, false); 3689 PFTy = PointerType::getUnqual(Ty); 3690 } 3691 3692 // Look up the callee. 3693 Value *Callee; 3694 if (ConvertValIDToValue(PFTy, CalleeID, Callee, &PFS)) return true; 3695 3696 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 3697 // function attributes. 3698 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 3699 if (FnAttrs & ObsoleteFuncAttrs) { 3700 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 3701 FnAttrs &= ~ObsoleteFuncAttrs; 3702 } 3703 3704 // Set up the Attributes for the function. 3705 SmallVector<AttributeWithIndex, 8> Attrs; 3706 if (RetAttrs != Attribute::None) 3707 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3708 3709 SmallVector<Value*, 8> Args; 3710 3711 // Loop through FunctionType's arguments and ensure they are specified 3712 // correctly. Also, gather any parameter attributes. 3713 FunctionType::param_iterator I = Ty->param_begin(); 3714 FunctionType::param_iterator E = Ty->param_end(); 3715 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3716 const Type *ExpectedTy = 0; 3717 if (I != E) { 3718 ExpectedTy = *I++; 3719 } else if (!Ty->isVarArg()) { 3720 return Error(ArgList[i].Loc, "too many arguments specified"); 3721 } 3722 3723 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3724 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3725 ExpectedTy->getDescription() + "'"); 3726 Args.push_back(ArgList[i].V); 3727 if (ArgList[i].Attrs != Attribute::None) 3728 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3729 } 3730 3731 if (I != E) 3732 return Error(CallLoc, "not enough parameters specified for call"); 3733 3734 if (FnAttrs != Attribute::None) 3735 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3736 3737 // Finish off the Attributes and check them 3738 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3739 3740 CallInst *CI = CallInst::Create(Callee, Args.begin(), Args.end()); 3741 CI->setTailCall(isTail); 3742 CI->setCallingConv(CC); 3743 CI->setAttributes(PAL); 3744 Inst = CI; 3745 return false; 3746} 3747 3748//===----------------------------------------------------------------------===// 3749// Memory Instructions. 3750//===----------------------------------------------------------------------===// 3751 3752/// ParseAlloc 3753/// ::= 'malloc' Type (',' TypeAndValue)? (',' OptionalInfo)? 3754/// ::= 'alloca' Type (',' TypeAndValue)? (',' OptionalInfo)? 3755int LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS, 3756 BasicBlock* BB, bool isAlloca) { 3757 PATypeHolder Ty(Type::getVoidTy(Context)); 3758 Value *Size = 0; 3759 LocTy SizeLoc; 3760 unsigned Alignment = 0; 3761 if (ParseType(Ty)) return true; 3762 3763 bool AteExtraComma = false; 3764 if (EatIfPresent(lltok::comma)) { 3765 if (Lex.getKind() == lltok::kw_align) { 3766 if (ParseOptionalAlignment(Alignment)) return true; 3767 } else if (Lex.getKind() == lltok::MetadataVar) { 3768 AteExtraComma = true; 3769 } else { 3770 if (ParseTypeAndValue(Size, SizeLoc, PFS) || 3771 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3772 return true; 3773 } 3774 } 3775 3776 if (Size && !Size->getType()->isIntegerTy(32)) 3777 return Error(SizeLoc, "element count must be i32"); 3778 3779 if (isAlloca) { 3780 Inst = new AllocaInst(Ty, Size, Alignment); 3781 return AteExtraComma ? InstExtraComma : InstNormal; 3782 } 3783 3784 // Autoupgrade old malloc instruction to malloc call. 3785 // FIXME: Remove in LLVM 3.0. 3786 const Type *IntPtrTy = Type::getInt32Ty(Context); 3787 Constant *AllocSize = ConstantExpr::getSizeOf(Ty); 3788 AllocSize = ConstantExpr::getTruncOrBitCast(AllocSize, IntPtrTy); 3789 if (!MallocF) 3790 // Prototype malloc as "void *(int32)". 3791 // This function is renamed as "malloc" in ValidateEndOfModule(). 3792 MallocF = cast<Function>( 3793 M->getOrInsertFunction("", Type::getInt8PtrTy(Context), IntPtrTy, NULL)); 3794 Inst = CallInst::CreateMalloc(BB, IntPtrTy, Ty, AllocSize, Size, MallocF); 3795return AteExtraComma ? InstExtraComma : InstNormal; 3796} 3797 3798/// ParseFree 3799/// ::= 'free' TypeAndValue 3800bool LLParser::ParseFree(Instruction *&Inst, PerFunctionState &PFS, 3801 BasicBlock* BB) { 3802 Value *Val; LocTy Loc; 3803 if (ParseTypeAndValue(Val, Loc, PFS)) return true; 3804 if (!Val->getType()->isPointerTy()) 3805 return Error(Loc, "operand to free must be a pointer"); 3806 Inst = CallInst::CreateFree(Val, BB); 3807 return false; 3808} 3809 3810/// ParseLoad 3811/// ::= 'volatile'? 'load' TypeAndValue (',' OptionalInfo)? 3812int LLParser::ParseLoad(Instruction *&Inst, PerFunctionState &PFS, 3813 bool isVolatile) { 3814 Value *Val; LocTy Loc; 3815 unsigned Alignment = 0; 3816 bool AteExtraComma = false; 3817 if (ParseTypeAndValue(Val, Loc, PFS) || 3818 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3819 return true; 3820 3821 if (!Val->getType()->isPointerTy() || 3822 !cast<PointerType>(Val->getType())->getElementType()->isFirstClassType()) 3823 return Error(Loc, "load operand must be a pointer to a first class type"); 3824 3825 Inst = new LoadInst(Val, "", isVolatile, Alignment); 3826 return AteExtraComma ? InstExtraComma : InstNormal; 3827} 3828 3829/// ParseStore 3830/// ::= 'volatile'? 'store' TypeAndValue ',' TypeAndValue (',' 'align' i32)? 3831int LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS, 3832 bool isVolatile) { 3833 Value *Val, *Ptr; LocTy Loc, PtrLoc; 3834 unsigned Alignment = 0; 3835 bool AteExtraComma = false; 3836 if (ParseTypeAndValue(Val, Loc, PFS) || 3837 ParseToken(lltok::comma, "expected ',' after store operand") || 3838 ParseTypeAndValue(Ptr, PtrLoc, PFS) || 3839 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3840 return true; 3841 3842 if (!Ptr->getType()->isPointerTy()) 3843 return Error(PtrLoc, "store operand must be a pointer"); 3844 if (!Val->getType()->isFirstClassType()) 3845 return Error(Loc, "store operand must be a first class value"); 3846 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType()) 3847 return Error(Loc, "stored value and pointer type do not match"); 3848 3849 Inst = new StoreInst(Val, Ptr, isVolatile, Alignment); 3850 return AteExtraComma ? InstExtraComma : InstNormal; 3851} 3852 3853/// ParseGetResult 3854/// ::= 'getresult' TypeAndValue ',' i32 3855/// FIXME: Remove support for getresult in LLVM 3.0 3856bool LLParser::ParseGetResult(Instruction *&Inst, PerFunctionState &PFS) { 3857 Value *Val; LocTy ValLoc, EltLoc; 3858 unsigned Element; 3859 if (ParseTypeAndValue(Val, ValLoc, PFS) || 3860 ParseToken(lltok::comma, "expected ',' after getresult operand") || 3861 ParseUInt32(Element, EltLoc)) 3862 return true; 3863 3864 if (!Val->getType()->isStructTy() && !Val->getType()->isArrayTy()) 3865 return Error(ValLoc, "getresult inst requires an aggregate operand"); 3866 if (!ExtractValueInst::getIndexedType(Val->getType(), Element)) 3867 return Error(EltLoc, "invalid getresult index for value"); 3868 Inst = ExtractValueInst::Create(Val, Element); 3869 return false; 3870} 3871 3872/// ParseGetElementPtr 3873/// ::= 'getelementptr' 'inbounds'? TypeAndValue (',' TypeAndValue)* 3874int LLParser::ParseGetElementPtr(Instruction *&Inst, PerFunctionState &PFS) { 3875 Value *Ptr, *Val; LocTy Loc, EltLoc; 3876 3877 bool InBounds = EatIfPresent(lltok::kw_inbounds); 3878 3879 if (ParseTypeAndValue(Ptr, Loc, PFS)) return true; 3880 3881 if (!Ptr->getType()->isPointerTy()) 3882 return Error(Loc, "base of getelementptr must be a pointer"); 3883 3884 SmallVector<Value*, 16> Indices; 3885 bool AteExtraComma = false; 3886 while (EatIfPresent(lltok::comma)) { 3887 if (Lex.getKind() == lltok::MetadataVar) { 3888 AteExtraComma = true; 3889 break; 3890 } 3891 if (ParseTypeAndValue(Val, EltLoc, PFS)) return true; 3892 if (!Val->getType()->isIntegerTy()) 3893 return Error(EltLoc, "getelementptr index must be an integer"); 3894 Indices.push_back(Val); 3895 } 3896 3897 if (!GetElementPtrInst::getIndexedType(Ptr->getType(), 3898 Indices.begin(), Indices.end())) 3899 return Error(Loc, "invalid getelementptr indices"); 3900 Inst = GetElementPtrInst::Create(Ptr, Indices.begin(), Indices.end()); 3901 if (InBounds) 3902 cast<GetElementPtrInst>(Inst)->setIsInBounds(true); 3903 return AteExtraComma ? InstExtraComma : InstNormal; 3904} 3905 3906/// ParseExtractValue 3907/// ::= 'extractvalue' TypeAndValue (',' uint32)+ 3908int LLParser::ParseExtractValue(Instruction *&Inst, PerFunctionState &PFS) { 3909 Value *Val; LocTy Loc; 3910 SmallVector<unsigned, 4> Indices; 3911 bool AteExtraComma; 3912 if (ParseTypeAndValue(Val, Loc, PFS) || 3913 ParseIndexList(Indices, AteExtraComma)) 3914 return true; 3915 3916 if (!Val->getType()->isAggregateType()) 3917 return Error(Loc, "extractvalue operand must be aggregate type"); 3918 3919 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 3920 Indices.end())) 3921 return Error(Loc, "invalid indices for extractvalue"); 3922 Inst = ExtractValueInst::Create(Val, Indices.begin(), Indices.end()); 3923 return AteExtraComma ? InstExtraComma : InstNormal; 3924} 3925 3926/// ParseInsertValue 3927/// ::= 'insertvalue' TypeAndValue ',' TypeAndValue (',' uint32)+ 3928int LLParser::ParseInsertValue(Instruction *&Inst, PerFunctionState &PFS) { 3929 Value *Val0, *Val1; LocTy Loc0, Loc1; 3930 SmallVector<unsigned, 4> Indices; 3931 bool AteExtraComma; 3932 if (ParseTypeAndValue(Val0, Loc0, PFS) || 3933 ParseToken(lltok::comma, "expected comma after insertvalue operand") || 3934 ParseTypeAndValue(Val1, Loc1, PFS) || 3935 ParseIndexList(Indices, AteExtraComma)) 3936 return true; 3937 3938 if (!Val0->getType()->isAggregateType()) 3939 return Error(Loc0, "insertvalue operand must be aggregate type"); 3940 3941 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 3942 Indices.end())) 3943 return Error(Loc0, "invalid indices for insertvalue"); 3944 Inst = InsertValueInst::Create(Val0, Val1, Indices.begin(), Indices.end()); 3945 return AteExtraComma ? InstExtraComma : InstNormal; 3946} 3947 3948//===----------------------------------------------------------------------===// 3949// Embedded metadata. 3950//===----------------------------------------------------------------------===// 3951 3952/// ParseMDNodeVector 3953/// ::= Element (',' Element)* 3954/// Element 3955/// ::= 'null' | TypeAndValue 3956bool LLParser::ParseMDNodeVector(SmallVectorImpl<Value*> &Elts, 3957 PerFunctionState *PFS) { 3958 do { 3959 // Null is a special case since it is typeless. 3960 if (EatIfPresent(lltok::kw_null)) { 3961 Elts.push_back(0); 3962 continue; 3963 } 3964 3965 Value *V = 0; 3966 PATypeHolder Ty(Type::getVoidTy(Context)); 3967 ValID ID; 3968 if (ParseType(Ty) || ParseValID(ID, PFS) || 3969 ConvertValIDToValue(Ty, ID, V, PFS)) 3970 return true; 3971 3972 Elts.push_back(V); 3973 } while (EatIfPresent(lltok::comma)); 3974 3975 return false; 3976} 3977