LLParser.cpp revision 206083
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 assert(Lex.getKind() == lltok::kw_type); 326 LocTy TypeLoc = Lex.getLoc(); 327 Lex.Lex(); // eat kw_type 328 329 PATypeHolder Ty(Type::getVoidTy(Context)); 330 if (ParseType(Ty)) return true; 331 332 // See if this type was previously referenced. 333 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 334 FI = ForwardRefTypeIDs.find(TypeID); 335 if (FI != ForwardRefTypeIDs.end()) { 336 if (FI->second.first.get() == Ty) 337 return Error(TypeLoc, "self referential type is invalid"); 338 339 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 340 Ty = FI->second.first.get(); 341 ForwardRefTypeIDs.erase(FI); 342 } 343 344 NumberedTypes.push_back(Ty); 345 346 return false; 347} 348 349/// toplevelentity 350/// ::= LocalVar '=' 'type' type 351bool LLParser::ParseNamedType() { 352 std::string Name = Lex.getStrVal(); 353 LocTy NameLoc = Lex.getLoc(); 354 Lex.Lex(); // eat LocalVar. 355 356 PATypeHolder Ty(Type::getVoidTy(Context)); 357 358 if (ParseToken(lltok::equal, "expected '=' after name") || 359 ParseToken(lltok::kw_type, "expected 'type' after name") || 360 ParseType(Ty)) 361 return true; 362 363 // Set the type name, checking for conflicts as we do so. 364 bool AlreadyExists = M->addTypeName(Name, Ty); 365 if (!AlreadyExists) return false; 366 367 // See if this type is a forward reference. We need to eagerly resolve 368 // types to allow recursive type redefinitions below. 369 std::map<std::string, std::pair<PATypeHolder, LocTy> >::iterator 370 FI = ForwardRefTypes.find(Name); 371 if (FI != ForwardRefTypes.end()) { 372 if (FI->second.first.get() == Ty) 373 return Error(NameLoc, "self referential type is invalid"); 374 375 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 376 Ty = FI->second.first.get(); 377 ForwardRefTypes.erase(FI); 378 } 379 380 // Inserting a name that is already defined, get the existing name. 381 const Type *Existing = M->getTypeByName(Name); 382 assert(Existing && "Conflict but no matching type?!"); 383 384 // Otherwise, this is an attempt to redefine a type. That's okay if 385 // the redefinition is identical to the original. 386 // FIXME: REMOVE REDEFINITIONS IN LLVM 3.0 387 if (Existing == Ty) return false; 388 389 // Any other kind of (non-equivalent) redefinition is an error. 390 return Error(NameLoc, "redefinition of type named '" + Name + "' of type '" + 391 Ty->getDescription() + "'"); 392} 393 394 395/// toplevelentity 396/// ::= 'declare' FunctionHeader 397bool LLParser::ParseDeclare() { 398 assert(Lex.getKind() == lltok::kw_declare); 399 Lex.Lex(); 400 401 Function *F; 402 return ParseFunctionHeader(F, false); 403} 404 405/// toplevelentity 406/// ::= 'define' FunctionHeader '{' ... 407bool LLParser::ParseDefine() { 408 assert(Lex.getKind() == lltok::kw_define); 409 Lex.Lex(); 410 411 Function *F; 412 return ParseFunctionHeader(F, true) || 413 ParseFunctionBody(*F); 414} 415 416/// ParseGlobalType 417/// ::= 'constant' 418/// ::= 'global' 419bool LLParser::ParseGlobalType(bool &IsConstant) { 420 if (Lex.getKind() == lltok::kw_constant) 421 IsConstant = true; 422 else if (Lex.getKind() == lltok::kw_global) 423 IsConstant = false; 424 else { 425 IsConstant = false; 426 return TokError("expected 'global' or 'constant'"); 427 } 428 Lex.Lex(); 429 return false; 430} 431 432/// ParseUnnamedGlobal: 433/// OptionalVisibility ALIAS ... 434/// OptionalLinkage OptionalVisibility ... -> global variable 435/// GlobalID '=' OptionalVisibility ALIAS ... 436/// GlobalID '=' OptionalLinkage OptionalVisibility ... -> global variable 437bool LLParser::ParseUnnamedGlobal() { 438 unsigned VarID = NumberedVals.size(); 439 std::string Name; 440 LocTy NameLoc = Lex.getLoc(); 441 442 // Handle the GlobalID form. 443 if (Lex.getKind() == lltok::GlobalID) { 444 if (Lex.getUIntVal() != VarID) 445 return Error(Lex.getLoc(), "variable expected to be numbered '%" + 446 utostr(VarID) + "'"); 447 Lex.Lex(); // eat GlobalID; 448 449 if (ParseToken(lltok::equal, "expected '=' after name")) 450 return true; 451 } 452 453 bool HasLinkage; 454 unsigned Linkage, Visibility; 455 if (ParseOptionalLinkage(Linkage, HasLinkage) || 456 ParseOptionalVisibility(Visibility)) 457 return true; 458 459 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 460 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 461 return ParseAlias(Name, NameLoc, Visibility); 462} 463 464/// ParseNamedGlobal: 465/// GlobalVar '=' OptionalVisibility ALIAS ... 466/// GlobalVar '=' OptionalLinkage OptionalVisibility ... -> global variable 467bool LLParser::ParseNamedGlobal() { 468 assert(Lex.getKind() == lltok::GlobalVar); 469 LocTy NameLoc = Lex.getLoc(); 470 std::string Name = Lex.getStrVal(); 471 Lex.Lex(); 472 473 bool HasLinkage; 474 unsigned Linkage, Visibility; 475 if (ParseToken(lltok::equal, "expected '=' in global variable") || 476 ParseOptionalLinkage(Linkage, HasLinkage) || 477 ParseOptionalVisibility(Visibility)) 478 return true; 479 480 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 481 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 482 return ParseAlias(Name, NameLoc, Visibility); 483} 484 485// MDString: 486// ::= '!' STRINGCONSTANT 487bool LLParser::ParseMDString(MDString *&Result) { 488 std::string Str; 489 if (ParseStringConstant(Str)) return true; 490 Result = MDString::get(Context, Str); 491 return false; 492} 493 494// MDNode: 495// ::= '!' MDNodeNumber 496// 497/// This version of ParseMDNodeID returns the slot number and null in the case 498/// of a forward reference. 499bool LLParser::ParseMDNodeID(MDNode *&Result, unsigned &SlotNo) { 500 // !{ ..., !42, ... } 501 if (ParseUInt32(SlotNo)) return true; 502 503 // Check existing MDNode. 504 if (SlotNo < NumberedMetadata.size() && NumberedMetadata[SlotNo] != 0) 505 Result = NumberedMetadata[SlotNo]; 506 else 507 Result = 0; 508 return false; 509} 510 511bool LLParser::ParseMDNodeID(MDNode *&Result) { 512 // !{ ..., !42, ... } 513 unsigned MID = 0; 514 if (ParseMDNodeID(Result, MID)) return true; 515 516 // If not a forward reference, just return it now. 517 if (Result) return false; 518 519 // Otherwise, create MDNode forward reference. 520 521 // FIXME: This is not unique enough! 522 std::string FwdRefName = "llvm.mdnode.fwdref." + utostr(MID); 523 Value *V = MDString::get(Context, FwdRefName); 524 MDNode *FwdNode = MDNode::get(Context, &V, 1); 525 ForwardRefMDNodes[MID] = std::make_pair(FwdNode, Lex.getLoc()); 526 527 if (NumberedMetadata.size() <= MID) 528 NumberedMetadata.resize(MID+1); 529 NumberedMetadata[MID] = FwdNode; 530 Result = FwdNode; 531 return false; 532} 533 534/// ParseNamedMetadata: 535/// !foo = !{ !1, !2 } 536bool LLParser::ParseNamedMetadata() { 537 assert(Lex.getKind() == lltok::MetadataVar); 538 std::string Name = Lex.getStrVal(); 539 Lex.Lex(); 540 541 if (ParseToken(lltok::equal, "expected '=' here") || 542 ParseToken(lltok::exclaim, "Expected '!' here") || 543 ParseToken(lltok::lbrace, "Expected '{' here")) 544 return true; 545 546 SmallVector<MDNode *, 8> Elts; 547 do { 548 // Null is a special case since it is typeless. 549 if (EatIfPresent(lltok::kw_null)) { 550 Elts.push_back(0); 551 continue; 552 } 553 554 if (ParseToken(lltok::exclaim, "Expected '!' here")) 555 return true; 556 557 MDNode *N = 0; 558 if (ParseMDNodeID(N)) return true; 559 Elts.push_back(N); 560 } while (EatIfPresent(lltok::comma)); 561 562 if (ParseToken(lltok::rbrace, "expected end of metadata node")) 563 return true; 564 565 NamedMDNode::Create(Context, Name, Elts.data(), Elts.size(), M); 566 return false; 567} 568 569/// ParseStandaloneMetadata: 570/// !42 = !{...} 571bool LLParser::ParseStandaloneMetadata() { 572 assert(Lex.getKind() == lltok::exclaim); 573 Lex.Lex(); 574 unsigned MetadataID = 0; 575 576 LocTy TyLoc; 577 PATypeHolder Ty(Type::getVoidTy(Context)); 578 SmallVector<Value *, 16> Elts; 579 if (ParseUInt32(MetadataID) || 580 ParseToken(lltok::equal, "expected '=' here") || 581 ParseType(Ty, TyLoc) || 582 ParseToken(lltok::exclaim, "Expected '!' here") || 583 ParseToken(lltok::lbrace, "Expected '{' here") || 584 ParseMDNodeVector(Elts, NULL) || 585 ParseToken(lltok::rbrace, "expected end of metadata node")) 586 return true; 587 588 MDNode *Init = MDNode::get(Context, Elts.data(), Elts.size()); 589 590 // See if this was forward referenced, if so, handle it. 591 std::map<unsigned, std::pair<TrackingVH<MDNode>, LocTy> >::iterator 592 FI = ForwardRefMDNodes.find(MetadataID); 593 if (FI != ForwardRefMDNodes.end()) { 594 FI->second.first->replaceAllUsesWith(Init); 595 ForwardRefMDNodes.erase(FI); 596 597 assert(NumberedMetadata[MetadataID] == Init && "Tracking VH didn't work"); 598 } else { 599 if (MetadataID >= NumberedMetadata.size()) 600 NumberedMetadata.resize(MetadataID+1); 601 602 if (NumberedMetadata[MetadataID] != 0) 603 return TokError("Metadata id is already used"); 604 NumberedMetadata[MetadataID] = Init; 605 } 606 607 return false; 608} 609 610/// ParseAlias: 611/// ::= GlobalVar '=' OptionalVisibility 'alias' OptionalLinkage Aliasee 612/// Aliasee 613/// ::= TypeAndValue 614/// ::= 'bitcast' '(' TypeAndValue 'to' Type ')' 615/// ::= 'getelementptr' 'inbounds'? '(' ... ')' 616/// 617/// Everything through visibility has already been parsed. 618/// 619bool LLParser::ParseAlias(const std::string &Name, LocTy NameLoc, 620 unsigned Visibility) { 621 assert(Lex.getKind() == lltok::kw_alias); 622 Lex.Lex(); 623 unsigned Linkage; 624 LocTy LinkageLoc = Lex.getLoc(); 625 if (ParseOptionalLinkage(Linkage)) 626 return true; 627 628 if (Linkage != GlobalValue::ExternalLinkage && 629 Linkage != GlobalValue::WeakAnyLinkage && 630 Linkage != GlobalValue::WeakODRLinkage && 631 Linkage != GlobalValue::InternalLinkage && 632 Linkage != GlobalValue::PrivateLinkage && 633 Linkage != GlobalValue::LinkerPrivateLinkage) 634 return Error(LinkageLoc, "invalid linkage type for alias"); 635 636 Constant *Aliasee; 637 LocTy AliaseeLoc = Lex.getLoc(); 638 if (Lex.getKind() != lltok::kw_bitcast && 639 Lex.getKind() != lltok::kw_getelementptr) { 640 if (ParseGlobalTypeAndValue(Aliasee)) return true; 641 } else { 642 // The bitcast dest type is not present, it is implied by the dest type. 643 ValID ID; 644 if (ParseValID(ID)) return true; 645 if (ID.Kind != ValID::t_Constant) 646 return Error(AliaseeLoc, "invalid aliasee"); 647 Aliasee = ID.ConstantVal; 648 } 649 650 if (!Aliasee->getType()->isPointerTy()) 651 return Error(AliaseeLoc, "alias must have pointer type"); 652 653 // Okay, create the alias but do not insert it into the module yet. 654 GlobalAlias* GA = new GlobalAlias(Aliasee->getType(), 655 (GlobalValue::LinkageTypes)Linkage, Name, 656 Aliasee); 657 GA->setVisibility((GlobalValue::VisibilityTypes)Visibility); 658 659 // See if this value already exists in the symbol table. If so, it is either 660 // a redefinition or a definition of a forward reference. 661 if (GlobalValue *Val = M->getNamedValue(Name)) { 662 // See if this was a redefinition. If so, there is no entry in 663 // ForwardRefVals. 664 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 665 I = ForwardRefVals.find(Name); 666 if (I == ForwardRefVals.end()) 667 return Error(NameLoc, "redefinition of global named '@" + Name + "'"); 668 669 // Otherwise, this was a definition of forward ref. Verify that types 670 // agree. 671 if (Val->getType() != GA->getType()) 672 return Error(NameLoc, 673 "forward reference and definition of alias have different types"); 674 675 // If they agree, just RAUW the old value with the alias and remove the 676 // forward ref info. 677 Val->replaceAllUsesWith(GA); 678 Val->eraseFromParent(); 679 ForwardRefVals.erase(I); 680 } 681 682 // Insert into the module, we know its name won't collide now. 683 M->getAliasList().push_back(GA); 684 assert(GA->getNameStr() == Name && "Should not be a name conflict!"); 685 686 return false; 687} 688 689/// ParseGlobal 690/// ::= GlobalVar '=' OptionalLinkage OptionalVisibility OptionalThreadLocal 691/// OptionalAddrSpace GlobalType Type Const 692/// ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 693/// OptionalAddrSpace GlobalType Type Const 694/// 695/// Everything through visibility has been parsed already. 696/// 697bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc, 698 unsigned Linkage, bool HasLinkage, 699 unsigned Visibility) { 700 unsigned AddrSpace; 701 bool ThreadLocal, IsConstant; 702 LocTy TyLoc; 703 704 PATypeHolder Ty(Type::getVoidTy(Context)); 705 if (ParseOptionalToken(lltok::kw_thread_local, ThreadLocal) || 706 ParseOptionalAddrSpace(AddrSpace) || 707 ParseGlobalType(IsConstant) || 708 ParseType(Ty, TyLoc)) 709 return true; 710 711 // If the linkage is specified and is external, then no initializer is 712 // present. 713 Constant *Init = 0; 714 if (!HasLinkage || (Linkage != GlobalValue::DLLImportLinkage && 715 Linkage != GlobalValue::ExternalWeakLinkage && 716 Linkage != GlobalValue::ExternalLinkage)) { 717 if (ParseGlobalValue(Ty, Init)) 718 return true; 719 } 720 721 if (Ty->isFunctionTy() || Ty->isLabelTy()) 722 return Error(TyLoc, "invalid type for global variable"); 723 724 GlobalVariable *GV = 0; 725 726 // See if the global was forward referenced, if so, use the global. 727 if (!Name.empty()) { 728 if (GlobalValue *GVal = M->getNamedValue(Name)) { 729 if (!ForwardRefVals.erase(Name) || !isa<GlobalValue>(GVal)) 730 return Error(NameLoc, "redefinition of global '@" + Name + "'"); 731 GV = cast<GlobalVariable>(GVal); 732 } 733 } else { 734 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 735 I = ForwardRefValIDs.find(NumberedVals.size()); 736 if (I != ForwardRefValIDs.end()) { 737 GV = cast<GlobalVariable>(I->second.first); 738 ForwardRefValIDs.erase(I); 739 } 740 } 741 742 if (GV == 0) { 743 GV = new GlobalVariable(*M, Ty, false, GlobalValue::ExternalLinkage, 0, 744 Name, 0, false, AddrSpace); 745 } else { 746 if (GV->getType()->getElementType() != Ty) 747 return Error(TyLoc, 748 "forward reference and definition of global have different types"); 749 750 // Move the forward-reference to the correct spot in the module. 751 M->getGlobalList().splice(M->global_end(), M->getGlobalList(), GV); 752 } 753 754 if (Name.empty()) 755 NumberedVals.push_back(GV); 756 757 // Set the parsed properties on the global. 758 if (Init) 759 GV->setInitializer(Init); 760 GV->setConstant(IsConstant); 761 GV->setLinkage((GlobalValue::LinkageTypes)Linkage); 762 GV->setVisibility((GlobalValue::VisibilityTypes)Visibility); 763 GV->setThreadLocal(ThreadLocal); 764 765 // Parse attributes on the global. 766 while (Lex.getKind() == lltok::comma) { 767 Lex.Lex(); 768 769 if (Lex.getKind() == lltok::kw_section) { 770 Lex.Lex(); 771 GV->setSection(Lex.getStrVal()); 772 if (ParseToken(lltok::StringConstant, "expected global section string")) 773 return true; 774 } else if (Lex.getKind() == lltok::kw_align) { 775 unsigned Alignment; 776 if (ParseOptionalAlignment(Alignment)) return true; 777 GV->setAlignment(Alignment); 778 } else { 779 TokError("unknown global variable property!"); 780 } 781 } 782 783 return false; 784} 785 786 787//===----------------------------------------------------------------------===// 788// GlobalValue Reference/Resolution Routines. 789//===----------------------------------------------------------------------===// 790 791/// GetGlobalVal - Get a value with the specified name or ID, creating a 792/// forward reference record if needed. This can return null if the value 793/// exists but does not have the right type. 794GlobalValue *LLParser::GetGlobalVal(const std::string &Name, const Type *Ty, 795 LocTy Loc) { 796 const PointerType *PTy = dyn_cast<PointerType>(Ty); 797 if (PTy == 0) { 798 Error(Loc, "global variable reference must have pointer type"); 799 return 0; 800 } 801 802 // Look this name up in the normal function symbol table. 803 GlobalValue *Val = 804 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name)); 805 806 // If this is a forward reference for the value, see if we already created a 807 // forward ref record. 808 if (Val == 0) { 809 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 810 I = ForwardRefVals.find(Name); 811 if (I != ForwardRefVals.end()) 812 Val = I->second.first; 813 } 814 815 // If we have the value in the symbol table or fwd-ref table, return it. 816 if (Val) { 817 if (Val->getType() == Ty) return Val; 818 Error(Loc, "'@" + Name + "' defined with type '" + 819 Val->getType()->getDescription() + "'"); 820 return 0; 821 } 822 823 // Otherwise, create a new forward reference for this value and remember it. 824 GlobalValue *FwdVal; 825 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 826 // Function types can return opaque but functions can't. 827 if (FT->getReturnType()->isOpaqueTy()) { 828 Error(Loc, "function may not return opaque type"); 829 return 0; 830 } 831 832 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M); 833 } else { 834 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 835 GlobalValue::ExternalWeakLinkage, 0, Name); 836 } 837 838 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 839 return FwdVal; 840} 841 842GlobalValue *LLParser::GetGlobalVal(unsigned ID, const Type *Ty, LocTy Loc) { 843 const PointerType *PTy = dyn_cast<PointerType>(Ty); 844 if (PTy == 0) { 845 Error(Loc, "global variable reference must have pointer type"); 846 return 0; 847 } 848 849 GlobalValue *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 850 851 // If this is a forward reference for the value, see if we already created a 852 // forward ref record. 853 if (Val == 0) { 854 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 855 I = ForwardRefValIDs.find(ID); 856 if (I != ForwardRefValIDs.end()) 857 Val = I->second.first; 858 } 859 860 // If we have the value in the symbol table or fwd-ref table, return it. 861 if (Val) { 862 if (Val->getType() == Ty) return Val; 863 Error(Loc, "'@" + utostr(ID) + "' defined with type '" + 864 Val->getType()->getDescription() + "'"); 865 return 0; 866 } 867 868 // Otherwise, create a new forward reference for this value and remember it. 869 GlobalValue *FwdVal; 870 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 871 // Function types can return opaque but functions can't. 872 if (FT->getReturnType()->isOpaqueTy()) { 873 Error(Loc, "function may not return opaque type"); 874 return 0; 875 } 876 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, "", M); 877 } else { 878 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 879 GlobalValue::ExternalWeakLinkage, 0, ""); 880 } 881 882 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 883 return FwdVal; 884} 885 886 887//===----------------------------------------------------------------------===// 888// Helper Routines. 889//===----------------------------------------------------------------------===// 890 891/// ParseToken - If the current token has the specified kind, eat it and return 892/// success. Otherwise, emit the specified error and return failure. 893bool LLParser::ParseToken(lltok::Kind T, const char *ErrMsg) { 894 if (Lex.getKind() != T) 895 return TokError(ErrMsg); 896 Lex.Lex(); 897 return false; 898} 899 900/// ParseStringConstant 901/// ::= StringConstant 902bool LLParser::ParseStringConstant(std::string &Result) { 903 if (Lex.getKind() != lltok::StringConstant) 904 return TokError("expected string constant"); 905 Result = Lex.getStrVal(); 906 Lex.Lex(); 907 return false; 908} 909 910/// ParseUInt32 911/// ::= uint32 912bool LLParser::ParseUInt32(unsigned &Val) { 913 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned()) 914 return TokError("expected integer"); 915 uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(0xFFFFFFFFULL+1); 916 if (Val64 != unsigned(Val64)) 917 return TokError("expected 32-bit integer (too large)"); 918 Val = Val64; 919 Lex.Lex(); 920 return false; 921} 922 923 924/// ParseOptionalAddrSpace 925/// := /*empty*/ 926/// := 'addrspace' '(' uint32 ')' 927bool LLParser::ParseOptionalAddrSpace(unsigned &AddrSpace) { 928 AddrSpace = 0; 929 if (!EatIfPresent(lltok::kw_addrspace)) 930 return false; 931 return ParseToken(lltok::lparen, "expected '(' in address space") || 932 ParseUInt32(AddrSpace) || 933 ParseToken(lltok::rparen, "expected ')' in address space"); 934} 935 936/// ParseOptionalAttrs - Parse a potentially empty attribute list. AttrKind 937/// indicates what kind of attribute list this is: 0: function arg, 1: result, 938/// 2: function attr. 939/// 3: function arg after value: FIXME: REMOVE IN LLVM 3.0 940bool LLParser::ParseOptionalAttrs(unsigned &Attrs, unsigned AttrKind) { 941 Attrs = Attribute::None; 942 LocTy AttrLoc = Lex.getLoc(); 943 944 while (1) { 945 switch (Lex.getKind()) { 946 case lltok::kw_sext: 947 case lltok::kw_zext: 948 // Treat these as signext/zeroext if they occur in the argument list after 949 // the value, as in "call i8 @foo(i8 10 sext)". If they occur before the 950 // value, as in "call i8 @foo(i8 sext (" then it is part of a constant 951 // expr. 952 // FIXME: REMOVE THIS IN LLVM 3.0 953 if (AttrKind == 3) { 954 if (Lex.getKind() == lltok::kw_sext) 955 Attrs |= Attribute::SExt; 956 else 957 Attrs |= Attribute::ZExt; 958 break; 959 } 960 // FALL THROUGH. 961 default: // End of attributes. 962 if (AttrKind != 2 && (Attrs & Attribute::FunctionOnly)) 963 return Error(AttrLoc, "invalid use of function-only attribute"); 964 965 if (AttrKind != 0 && AttrKind != 3 && (Attrs & Attribute::ParameterOnly)) 966 return Error(AttrLoc, "invalid use of parameter-only attribute"); 967 968 return false; 969 case lltok::kw_zeroext: Attrs |= Attribute::ZExt; break; 970 case lltok::kw_signext: Attrs |= Attribute::SExt; break; 971 case lltok::kw_inreg: Attrs |= Attribute::InReg; break; 972 case lltok::kw_sret: Attrs |= Attribute::StructRet; break; 973 case lltok::kw_noalias: Attrs |= Attribute::NoAlias; break; 974 case lltok::kw_nocapture: Attrs |= Attribute::NoCapture; break; 975 case lltok::kw_byval: Attrs |= Attribute::ByVal; break; 976 case lltok::kw_nest: Attrs |= Attribute::Nest; break; 977 978 case lltok::kw_noreturn: Attrs |= Attribute::NoReturn; break; 979 case lltok::kw_nounwind: Attrs |= Attribute::NoUnwind; break; 980 case lltok::kw_noinline: Attrs |= Attribute::NoInline; break; 981 case lltok::kw_readnone: Attrs |= Attribute::ReadNone; break; 982 case lltok::kw_readonly: Attrs |= Attribute::ReadOnly; break; 983 case lltok::kw_inlinehint: Attrs |= Attribute::InlineHint; break; 984 case lltok::kw_alwaysinline: Attrs |= Attribute::AlwaysInline; break; 985 case lltok::kw_optsize: Attrs |= Attribute::OptimizeForSize; break; 986 case lltok::kw_ssp: Attrs |= Attribute::StackProtect; break; 987 case lltok::kw_sspreq: Attrs |= Attribute::StackProtectReq; break; 988 case lltok::kw_noredzone: Attrs |= Attribute::NoRedZone; break; 989 case lltok::kw_noimplicitfloat: Attrs |= Attribute::NoImplicitFloat; break; 990 case lltok::kw_naked: Attrs |= Attribute::Naked; break; 991 992 case lltok::kw_alignstack: { 993 unsigned Alignment; 994 if (ParseOptionalStackAlignment(Alignment)) 995 return true; 996 Attrs |= Attribute::constructStackAlignmentFromInt(Alignment); 997 continue; 998 } 999 1000 case lltok::kw_align: { 1001 unsigned Alignment; 1002 if (ParseOptionalAlignment(Alignment)) 1003 return true; 1004 Attrs |= Attribute::constructAlignmentFromInt(Alignment); 1005 continue; 1006 } 1007 1008 } 1009 Lex.Lex(); 1010 } 1011} 1012 1013/// ParseOptionalLinkage 1014/// ::= /*empty*/ 1015/// ::= 'private' 1016/// ::= 'linker_private' 1017/// ::= 'internal' 1018/// ::= 'weak' 1019/// ::= 'weak_odr' 1020/// ::= 'linkonce' 1021/// ::= 'linkonce_odr' 1022/// ::= 'appending' 1023/// ::= 'dllexport' 1024/// ::= 'common' 1025/// ::= 'dllimport' 1026/// ::= 'extern_weak' 1027/// ::= 'external' 1028bool LLParser::ParseOptionalLinkage(unsigned &Res, bool &HasLinkage) { 1029 HasLinkage = false; 1030 switch (Lex.getKind()) { 1031 default: Res=GlobalValue::ExternalLinkage; return false; 1032 case lltok::kw_private: Res = GlobalValue::PrivateLinkage; break; 1033 case lltok::kw_linker_private: Res = GlobalValue::LinkerPrivateLinkage; break; 1034 case lltok::kw_internal: Res = GlobalValue::InternalLinkage; break; 1035 case lltok::kw_weak: Res = GlobalValue::WeakAnyLinkage; break; 1036 case lltok::kw_weak_odr: Res = GlobalValue::WeakODRLinkage; break; 1037 case lltok::kw_linkonce: Res = GlobalValue::LinkOnceAnyLinkage; break; 1038 case lltok::kw_linkonce_odr: Res = GlobalValue::LinkOnceODRLinkage; break; 1039 case lltok::kw_available_externally: 1040 Res = GlobalValue::AvailableExternallyLinkage; 1041 break; 1042 case lltok::kw_appending: Res = GlobalValue::AppendingLinkage; break; 1043 case lltok::kw_dllexport: Res = GlobalValue::DLLExportLinkage; break; 1044 case lltok::kw_common: Res = GlobalValue::CommonLinkage; break; 1045 case lltok::kw_dllimport: Res = GlobalValue::DLLImportLinkage; break; 1046 case lltok::kw_extern_weak: Res = GlobalValue::ExternalWeakLinkage; break; 1047 case lltok::kw_external: Res = GlobalValue::ExternalLinkage; break; 1048 } 1049 Lex.Lex(); 1050 HasLinkage = true; 1051 return false; 1052} 1053 1054/// ParseOptionalVisibility 1055/// ::= /*empty*/ 1056/// ::= 'default' 1057/// ::= 'hidden' 1058/// ::= 'protected' 1059/// 1060bool LLParser::ParseOptionalVisibility(unsigned &Res) { 1061 switch (Lex.getKind()) { 1062 default: Res = GlobalValue::DefaultVisibility; return false; 1063 case lltok::kw_default: Res = GlobalValue::DefaultVisibility; break; 1064 case lltok::kw_hidden: Res = GlobalValue::HiddenVisibility; break; 1065 case lltok::kw_protected: Res = GlobalValue::ProtectedVisibility; break; 1066 } 1067 Lex.Lex(); 1068 return false; 1069} 1070 1071/// ParseOptionalCallingConv 1072/// ::= /*empty*/ 1073/// ::= 'ccc' 1074/// ::= 'fastcc' 1075/// ::= 'coldcc' 1076/// ::= 'x86_stdcallcc' 1077/// ::= 'x86_fastcallcc' 1078/// ::= 'arm_apcscc' 1079/// ::= 'arm_aapcscc' 1080/// ::= 'arm_aapcs_vfpcc' 1081/// ::= 'msp430_intrcc' 1082/// ::= 'cc' UINT 1083/// 1084bool LLParser::ParseOptionalCallingConv(CallingConv::ID &CC) { 1085 switch (Lex.getKind()) { 1086 default: CC = CallingConv::C; return false; 1087 case lltok::kw_ccc: CC = CallingConv::C; break; 1088 case lltok::kw_fastcc: CC = CallingConv::Fast; break; 1089 case lltok::kw_coldcc: CC = CallingConv::Cold; break; 1090 case lltok::kw_x86_stdcallcc: CC = CallingConv::X86_StdCall; break; 1091 case lltok::kw_x86_fastcallcc: CC = CallingConv::X86_FastCall; break; 1092 case lltok::kw_arm_apcscc: CC = CallingConv::ARM_APCS; break; 1093 case lltok::kw_arm_aapcscc: CC = CallingConv::ARM_AAPCS; break; 1094 case lltok::kw_arm_aapcs_vfpcc:CC = CallingConv::ARM_AAPCS_VFP; break; 1095 case lltok::kw_msp430_intrcc: CC = CallingConv::MSP430_INTR; break; 1096 case lltok::kw_cc: { 1097 unsigned ArbitraryCC; 1098 Lex.Lex(); 1099 if (ParseUInt32(ArbitraryCC)) { 1100 return true; 1101 } else 1102 CC = static_cast<CallingConv::ID>(ArbitraryCC); 1103 return false; 1104 } 1105 break; 1106 } 1107 1108 Lex.Lex(); 1109 return false; 1110} 1111 1112/// ParseInstructionMetadata 1113/// ::= !dbg !42 (',' !dbg !57)* 1114bool LLParser::ParseInstructionMetadata(Instruction *Inst) { 1115 do { 1116 if (Lex.getKind() != lltok::MetadataVar) 1117 return TokError("expected metadata after comma"); 1118 1119 std::string Name = Lex.getStrVal(); 1120 Lex.Lex(); 1121 1122 MDNode *Node; 1123 unsigned NodeID; 1124 SMLoc Loc = Lex.getLoc(); 1125 if (ParseToken(lltok::exclaim, "expected '!' here") || 1126 ParseMDNodeID(Node, NodeID)) 1127 return true; 1128 1129 unsigned MDK = M->getMDKindID(Name.c_str()); 1130 if (Node) { 1131 // If we got the node, add it to the instruction. 1132 Inst->setMetadata(MDK, Node); 1133 } else { 1134 MDRef R = { Loc, MDK, NodeID }; 1135 // Otherwise, remember that this should be resolved later. 1136 ForwardRefInstMetadata[Inst].push_back(R); 1137 } 1138 1139 // If this is the end of the list, we're done. 1140 } while (EatIfPresent(lltok::comma)); 1141 return false; 1142} 1143 1144/// ParseOptionalAlignment 1145/// ::= /* empty */ 1146/// ::= 'align' 4 1147bool LLParser::ParseOptionalAlignment(unsigned &Alignment) { 1148 Alignment = 0; 1149 if (!EatIfPresent(lltok::kw_align)) 1150 return false; 1151 LocTy AlignLoc = Lex.getLoc(); 1152 if (ParseUInt32(Alignment)) return true; 1153 if (!isPowerOf2_32(Alignment)) 1154 return Error(AlignLoc, "alignment is not a power of two"); 1155 return false; 1156} 1157 1158/// ParseOptionalCommaAlign 1159/// ::= 1160/// ::= ',' align 4 1161/// 1162/// This returns with AteExtraComma set to true if it ate an excess comma at the 1163/// end. 1164bool LLParser::ParseOptionalCommaAlign(unsigned &Alignment, 1165 bool &AteExtraComma) { 1166 AteExtraComma = false; 1167 while (EatIfPresent(lltok::comma)) { 1168 // Metadata at the end is an early exit. 1169 if (Lex.getKind() == lltok::MetadataVar) { 1170 AteExtraComma = true; 1171 return false; 1172 } 1173 1174 if (Lex.getKind() == lltok::kw_align) { 1175 if (ParseOptionalAlignment(Alignment)) return true; 1176 } else 1177 return true; 1178 } 1179 1180 return false; 1181} 1182 1183/// ParseOptionalStackAlignment 1184/// ::= /* empty */ 1185/// ::= 'alignstack' '(' 4 ')' 1186bool LLParser::ParseOptionalStackAlignment(unsigned &Alignment) { 1187 Alignment = 0; 1188 if (!EatIfPresent(lltok::kw_alignstack)) 1189 return false; 1190 LocTy ParenLoc = Lex.getLoc(); 1191 if (!EatIfPresent(lltok::lparen)) 1192 return Error(ParenLoc, "expected '('"); 1193 LocTy AlignLoc = Lex.getLoc(); 1194 if (ParseUInt32(Alignment)) return true; 1195 ParenLoc = Lex.getLoc(); 1196 if (!EatIfPresent(lltok::rparen)) 1197 return Error(ParenLoc, "expected ')'"); 1198 if (!isPowerOf2_32(Alignment)) 1199 return Error(AlignLoc, "stack alignment is not a power of two"); 1200 return false; 1201} 1202 1203/// ParseIndexList - This parses the index list for an insert/extractvalue 1204/// instruction. This sets AteExtraComma in the case where we eat an extra 1205/// comma at the end of the line and find that it is followed by metadata. 1206/// Clients that don't allow metadata can call the version of this function that 1207/// only takes one argument. 1208/// 1209/// ParseIndexList 1210/// ::= (',' uint32)+ 1211/// 1212bool LLParser::ParseIndexList(SmallVectorImpl<unsigned> &Indices, 1213 bool &AteExtraComma) { 1214 AteExtraComma = false; 1215 1216 if (Lex.getKind() != lltok::comma) 1217 return TokError("expected ',' as start of index list"); 1218 1219 while (EatIfPresent(lltok::comma)) { 1220 if (Lex.getKind() == lltok::MetadataVar) { 1221 AteExtraComma = true; 1222 return false; 1223 } 1224 unsigned Idx; 1225 if (ParseUInt32(Idx)) return true; 1226 Indices.push_back(Idx); 1227 } 1228 1229 return false; 1230} 1231 1232//===----------------------------------------------------------------------===// 1233// Type Parsing. 1234//===----------------------------------------------------------------------===// 1235 1236/// ParseType - Parse and resolve a full type. 1237bool LLParser::ParseType(PATypeHolder &Result, bool AllowVoid) { 1238 LocTy TypeLoc = Lex.getLoc(); 1239 if (ParseTypeRec(Result)) return true; 1240 1241 // Verify no unresolved uprefs. 1242 if (!UpRefs.empty()) 1243 return Error(UpRefs.back().Loc, "invalid unresolved type up reference"); 1244 1245 if (!AllowVoid && Result.get()->isVoidTy()) 1246 return Error(TypeLoc, "void type only allowed for function results"); 1247 1248 return false; 1249} 1250 1251/// HandleUpRefs - Every time we finish a new layer of types, this function is 1252/// called. It loops through the UpRefs vector, which is a list of the 1253/// currently active types. For each type, if the up-reference is contained in 1254/// the newly completed type, we decrement the level count. When the level 1255/// count reaches zero, the up-referenced type is the type that is passed in: 1256/// thus we can complete the cycle. 1257/// 1258PATypeHolder LLParser::HandleUpRefs(const Type *ty) { 1259 // If Ty isn't abstract, or if there are no up-references in it, then there is 1260 // nothing to resolve here. 1261 if (!ty->isAbstract() || UpRefs.empty()) return ty; 1262 1263 PATypeHolder Ty(ty); 1264#if 0 1265 dbgs() << "Type '" << Ty->getDescription() 1266 << "' newly formed. Resolving upreferences.\n" 1267 << UpRefs.size() << " upreferences active!\n"; 1268#endif 1269 1270 // If we find any resolvable upreferences (i.e., those whose NestingLevel goes 1271 // to zero), we resolve them all together before we resolve them to Ty. At 1272 // the end of the loop, if there is anything to resolve to Ty, it will be in 1273 // this variable. 1274 OpaqueType *TypeToResolve = 0; 1275 1276 for (unsigned i = 0; i != UpRefs.size(); ++i) { 1277 // Determine if 'Ty' directly contains this up-references 'LastContainedTy'. 1278 bool ContainsType = 1279 std::find(Ty->subtype_begin(), Ty->subtype_end(), 1280 UpRefs[i].LastContainedTy) != Ty->subtype_end(); 1281 1282#if 0 1283 dbgs() << " UR#" << i << " - TypeContains(" << Ty->getDescription() << ", " 1284 << UpRefs[i].LastContainedTy->getDescription() << ") = " 1285 << (ContainsType ? "true" : "false") 1286 << " level=" << UpRefs[i].NestingLevel << "\n"; 1287#endif 1288 if (!ContainsType) 1289 continue; 1290 1291 // Decrement level of upreference 1292 unsigned Level = --UpRefs[i].NestingLevel; 1293 UpRefs[i].LastContainedTy = Ty; 1294 1295 // If the Up-reference has a non-zero level, it shouldn't be resolved yet. 1296 if (Level != 0) 1297 continue; 1298 1299#if 0 1300 dbgs() << " * Resolving upreference for " << UpRefs[i].UpRefTy << "\n"; 1301#endif 1302 if (!TypeToResolve) 1303 TypeToResolve = UpRefs[i].UpRefTy; 1304 else 1305 UpRefs[i].UpRefTy->refineAbstractTypeTo(TypeToResolve); 1306 UpRefs.erase(UpRefs.begin()+i); // Remove from upreference list. 1307 --i; // Do not skip the next element. 1308 } 1309 1310 if (TypeToResolve) 1311 TypeToResolve->refineAbstractTypeTo(Ty); 1312 1313 return Ty; 1314} 1315 1316 1317/// ParseTypeRec - The recursive function used to process the internal 1318/// implementation details of types. 1319bool LLParser::ParseTypeRec(PATypeHolder &Result) { 1320 switch (Lex.getKind()) { 1321 default: 1322 return TokError("expected type"); 1323 case lltok::Type: 1324 // TypeRec ::= 'float' | 'void' (etc) 1325 Result = Lex.getTyVal(); 1326 Lex.Lex(); 1327 break; 1328 case lltok::kw_opaque: 1329 // TypeRec ::= 'opaque' 1330 Result = OpaqueType::get(Context); 1331 Lex.Lex(); 1332 break; 1333 case lltok::lbrace: 1334 // TypeRec ::= '{' ... '}' 1335 if (ParseStructType(Result, false)) 1336 return true; 1337 break; 1338 case lltok::kw_union: 1339 // TypeRec ::= 'union' '{' ... '}' 1340 if (ParseUnionType(Result)) 1341 return true; 1342 break; 1343 case lltok::lsquare: 1344 // TypeRec ::= '[' ... ']' 1345 Lex.Lex(); // eat the lsquare. 1346 if (ParseArrayVectorType(Result, false)) 1347 return true; 1348 break; 1349 case lltok::less: // Either vector or packed struct. 1350 // TypeRec ::= '<' ... '>' 1351 Lex.Lex(); 1352 if (Lex.getKind() == lltok::lbrace) { 1353 if (ParseStructType(Result, true) || 1354 ParseToken(lltok::greater, "expected '>' at end of packed struct")) 1355 return true; 1356 } else if (ParseArrayVectorType(Result, true)) 1357 return true; 1358 break; 1359 case lltok::LocalVar: 1360 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0 1361 // TypeRec ::= %foo 1362 if (const Type *T = M->getTypeByName(Lex.getStrVal())) { 1363 Result = T; 1364 } else { 1365 Result = OpaqueType::get(Context); 1366 ForwardRefTypes.insert(std::make_pair(Lex.getStrVal(), 1367 std::make_pair(Result, 1368 Lex.getLoc()))); 1369 M->addTypeName(Lex.getStrVal(), Result.get()); 1370 } 1371 Lex.Lex(); 1372 break; 1373 1374 case lltok::LocalVarID: 1375 // TypeRec ::= %4 1376 if (Lex.getUIntVal() < NumberedTypes.size()) 1377 Result = NumberedTypes[Lex.getUIntVal()]; 1378 else { 1379 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 1380 I = ForwardRefTypeIDs.find(Lex.getUIntVal()); 1381 if (I != ForwardRefTypeIDs.end()) 1382 Result = I->second.first; 1383 else { 1384 Result = OpaqueType::get(Context); 1385 ForwardRefTypeIDs.insert(std::make_pair(Lex.getUIntVal(), 1386 std::make_pair(Result, 1387 Lex.getLoc()))); 1388 } 1389 } 1390 Lex.Lex(); 1391 break; 1392 case lltok::backslash: { 1393 // TypeRec ::= '\' 4 1394 Lex.Lex(); 1395 unsigned Val; 1396 if (ParseUInt32(Val)) return true; 1397 OpaqueType *OT = OpaqueType::get(Context); //Use temporary placeholder. 1398 UpRefs.push_back(UpRefRecord(Lex.getLoc(), Val, OT)); 1399 Result = OT; 1400 break; 1401 } 1402 } 1403 1404 // Parse the type suffixes. 1405 while (1) { 1406 switch (Lex.getKind()) { 1407 // End of type. 1408 default: return false; 1409 1410 // TypeRec ::= TypeRec '*' 1411 case lltok::star: 1412 if (Result.get()->isLabelTy()) 1413 return TokError("basic block pointers are invalid"); 1414 if (Result.get()->isVoidTy()) 1415 return TokError("pointers to void are invalid; use i8* instead"); 1416 if (!PointerType::isValidElementType(Result.get())) 1417 return TokError("pointer to this type is invalid"); 1418 Result = HandleUpRefs(PointerType::getUnqual(Result.get())); 1419 Lex.Lex(); 1420 break; 1421 1422 // TypeRec ::= TypeRec 'addrspace' '(' uint32 ')' '*' 1423 case lltok::kw_addrspace: { 1424 if (Result.get()->isLabelTy()) 1425 return TokError("basic block pointers are invalid"); 1426 if (Result.get()->isVoidTy()) 1427 return TokError("pointers to void are invalid; use i8* instead"); 1428 if (!PointerType::isValidElementType(Result.get())) 1429 return TokError("pointer to this type is invalid"); 1430 unsigned AddrSpace; 1431 if (ParseOptionalAddrSpace(AddrSpace) || 1432 ParseToken(lltok::star, "expected '*' in address space")) 1433 return true; 1434 1435 Result = HandleUpRefs(PointerType::get(Result.get(), AddrSpace)); 1436 break; 1437 } 1438 1439 /// Types '(' ArgTypeListI ')' OptFuncAttrs 1440 case lltok::lparen: 1441 if (ParseFunctionType(Result)) 1442 return true; 1443 break; 1444 } 1445 } 1446} 1447 1448/// ParseParameterList 1449/// ::= '(' ')' 1450/// ::= '(' Arg (',' Arg)* ')' 1451/// Arg 1452/// ::= Type OptionalAttributes Value OptionalAttributes 1453bool LLParser::ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList, 1454 PerFunctionState &PFS) { 1455 if (ParseToken(lltok::lparen, "expected '(' in call")) 1456 return true; 1457 1458 while (Lex.getKind() != lltok::rparen) { 1459 // If this isn't the first argument, we need a comma. 1460 if (!ArgList.empty() && 1461 ParseToken(lltok::comma, "expected ',' in argument list")) 1462 return true; 1463 1464 // Parse the argument. 1465 LocTy ArgLoc; 1466 PATypeHolder ArgTy(Type::getVoidTy(Context)); 1467 unsigned ArgAttrs1 = Attribute::None; 1468 unsigned ArgAttrs2 = Attribute::None; 1469 Value *V; 1470 if (ParseType(ArgTy, ArgLoc)) 1471 return true; 1472 1473 // Otherwise, handle normal operands. 1474 if (ParseOptionalAttrs(ArgAttrs1, 0) || 1475 ParseValue(ArgTy, V, PFS) || 1476 // FIXME: Should not allow attributes after the argument, remove this 1477 // in LLVM 3.0. 1478 ParseOptionalAttrs(ArgAttrs2, 3)) 1479 return true; 1480 ArgList.push_back(ParamInfo(ArgLoc, V, ArgAttrs1|ArgAttrs2)); 1481 } 1482 1483 Lex.Lex(); // Lex the ')'. 1484 return false; 1485} 1486 1487 1488 1489/// ParseArgumentList - Parse the argument list for a function type or function 1490/// prototype. If 'inType' is true then we are parsing a FunctionType. 1491/// ::= '(' ArgTypeListI ')' 1492/// ArgTypeListI 1493/// ::= /*empty*/ 1494/// ::= '...' 1495/// ::= ArgTypeList ',' '...' 1496/// ::= ArgType (',' ArgType)* 1497/// 1498bool LLParser::ParseArgumentList(std::vector<ArgInfo> &ArgList, 1499 bool &isVarArg, bool inType) { 1500 isVarArg = false; 1501 assert(Lex.getKind() == lltok::lparen); 1502 Lex.Lex(); // eat the (. 1503 1504 if (Lex.getKind() == lltok::rparen) { 1505 // empty 1506 } else if (Lex.getKind() == lltok::dotdotdot) { 1507 isVarArg = true; 1508 Lex.Lex(); 1509 } else { 1510 LocTy TypeLoc = Lex.getLoc(); 1511 PATypeHolder ArgTy(Type::getVoidTy(Context)); 1512 unsigned Attrs; 1513 std::string Name; 1514 1515 // If we're parsing a type, use ParseTypeRec, because we allow recursive 1516 // types (such as a function returning a pointer to itself). If parsing a 1517 // function prototype, we require fully resolved types. 1518 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1519 ParseOptionalAttrs(Attrs, 0)) return true; 1520 1521 if (ArgTy->isVoidTy()) 1522 return Error(TypeLoc, "argument can not have void type"); 1523 1524 if (Lex.getKind() == lltok::LocalVar || 1525 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1526 Name = Lex.getStrVal(); 1527 Lex.Lex(); 1528 } 1529 1530 if (!FunctionType::isValidArgumentType(ArgTy)) 1531 return Error(TypeLoc, "invalid type for function argument"); 1532 1533 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1534 1535 while (EatIfPresent(lltok::comma)) { 1536 // Handle ... at end of arg list. 1537 if (EatIfPresent(lltok::dotdotdot)) { 1538 isVarArg = true; 1539 break; 1540 } 1541 1542 // Otherwise must be an argument type. 1543 TypeLoc = Lex.getLoc(); 1544 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1545 ParseOptionalAttrs(Attrs, 0)) return true; 1546 1547 if (ArgTy->isVoidTy()) 1548 return Error(TypeLoc, "argument can not have void type"); 1549 1550 if (Lex.getKind() == lltok::LocalVar || 1551 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1552 Name = Lex.getStrVal(); 1553 Lex.Lex(); 1554 } else { 1555 Name = ""; 1556 } 1557 1558 if (!ArgTy->isFirstClassType() && !ArgTy->isOpaqueTy()) 1559 return Error(TypeLoc, "invalid type for function argument"); 1560 1561 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1562 } 1563 } 1564 1565 return ParseToken(lltok::rparen, "expected ')' at end of argument list"); 1566} 1567 1568/// ParseFunctionType 1569/// ::= Type ArgumentList OptionalAttrs 1570bool LLParser::ParseFunctionType(PATypeHolder &Result) { 1571 assert(Lex.getKind() == lltok::lparen); 1572 1573 if (!FunctionType::isValidReturnType(Result)) 1574 return TokError("invalid function return type"); 1575 1576 std::vector<ArgInfo> ArgList; 1577 bool isVarArg; 1578 unsigned Attrs; 1579 if (ParseArgumentList(ArgList, isVarArg, true) || 1580 // FIXME: Allow, but ignore attributes on function types! 1581 // FIXME: Remove in LLVM 3.0 1582 ParseOptionalAttrs(Attrs, 2)) 1583 return true; 1584 1585 // Reject names on the arguments lists. 1586 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 1587 if (!ArgList[i].Name.empty()) 1588 return Error(ArgList[i].Loc, "argument name invalid in function type"); 1589 if (!ArgList[i].Attrs != 0) { 1590 // Allow but ignore attributes on function types; this permits 1591 // auto-upgrade. 1592 // FIXME: REJECT ATTRIBUTES ON FUNCTION TYPES in LLVM 3.0 1593 } 1594 } 1595 1596 std::vector<const Type*> ArgListTy; 1597 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 1598 ArgListTy.push_back(ArgList[i].Type); 1599 1600 Result = HandleUpRefs(FunctionType::get(Result.get(), 1601 ArgListTy, isVarArg)); 1602 return false; 1603} 1604 1605/// ParseStructType: Handles packed and unpacked types. </> parsed elsewhere. 1606/// TypeRec 1607/// ::= '{' '}' 1608/// ::= '{' TypeRec (',' TypeRec)* '}' 1609/// ::= '<' '{' '}' '>' 1610/// ::= '<' '{' TypeRec (',' TypeRec)* '}' '>' 1611bool LLParser::ParseStructType(PATypeHolder &Result, bool Packed) { 1612 assert(Lex.getKind() == lltok::lbrace); 1613 Lex.Lex(); // Consume the '{' 1614 1615 if (EatIfPresent(lltok::rbrace)) { 1616 Result = StructType::get(Context, Packed); 1617 return false; 1618 } 1619 1620 std::vector<PATypeHolder> ParamsList; 1621 LocTy EltTyLoc = Lex.getLoc(); 1622 if (ParseTypeRec(Result)) return true; 1623 ParamsList.push_back(Result); 1624 1625 if (Result->isVoidTy()) 1626 return Error(EltTyLoc, "struct element can not have void type"); 1627 if (!StructType::isValidElementType(Result)) 1628 return Error(EltTyLoc, "invalid element type for struct"); 1629 1630 while (EatIfPresent(lltok::comma)) { 1631 EltTyLoc = Lex.getLoc(); 1632 if (ParseTypeRec(Result)) return true; 1633 1634 if (Result->isVoidTy()) 1635 return Error(EltTyLoc, "struct element can not have void type"); 1636 if (!StructType::isValidElementType(Result)) 1637 return Error(EltTyLoc, "invalid element type for struct"); 1638 1639 ParamsList.push_back(Result); 1640 } 1641 1642 if (ParseToken(lltok::rbrace, "expected '}' at end of struct")) 1643 return true; 1644 1645 std::vector<const Type*> ParamsListTy; 1646 for (unsigned i = 0, e = ParamsList.size(); i != e; ++i) 1647 ParamsListTy.push_back(ParamsList[i].get()); 1648 Result = HandleUpRefs(StructType::get(Context, ParamsListTy, Packed)); 1649 return false; 1650} 1651 1652/// ParseUnionType 1653/// TypeRec 1654/// ::= 'union' '{' TypeRec (',' TypeRec)* '}' 1655bool LLParser::ParseUnionType(PATypeHolder &Result) { 1656 assert(Lex.getKind() == lltok::kw_union); 1657 Lex.Lex(); // Consume the 'union' 1658 1659 if (ParseToken(lltok::lbrace, "'{' expected after 'union'")) return true; 1660 1661 SmallVector<PATypeHolder, 8> ParamsList; 1662 do { 1663 LocTy EltTyLoc = Lex.getLoc(); 1664 if (ParseTypeRec(Result)) return true; 1665 ParamsList.push_back(Result); 1666 1667 if (Result->isVoidTy()) 1668 return Error(EltTyLoc, "union element can not have void type"); 1669 if (!UnionType::isValidElementType(Result)) 1670 return Error(EltTyLoc, "invalid element type for union"); 1671 1672 } while (EatIfPresent(lltok::comma)) ; 1673 1674 if (ParseToken(lltok::rbrace, "expected '}' at end of union")) 1675 return true; 1676 1677 SmallVector<const Type*, 8> ParamsListTy; 1678 for (unsigned i = 0, e = ParamsList.size(); i != e; ++i) 1679 ParamsListTy.push_back(ParamsList[i].get()); 1680 Result = HandleUpRefs(UnionType::get(&ParamsListTy[0], ParamsListTy.size())); 1681 return false; 1682} 1683 1684/// ParseArrayVectorType - Parse an array or vector type, assuming the first 1685/// token has already been consumed. 1686/// TypeRec 1687/// ::= '[' APSINTVAL 'x' Types ']' 1688/// ::= '<' APSINTVAL 'x' Types '>' 1689bool LLParser::ParseArrayVectorType(PATypeHolder &Result, bool isVector) { 1690 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned() || 1691 Lex.getAPSIntVal().getBitWidth() > 64) 1692 return TokError("expected number in address space"); 1693 1694 LocTy SizeLoc = Lex.getLoc(); 1695 uint64_t Size = Lex.getAPSIntVal().getZExtValue(); 1696 Lex.Lex(); 1697 1698 if (ParseToken(lltok::kw_x, "expected 'x' after element count")) 1699 return true; 1700 1701 LocTy TypeLoc = Lex.getLoc(); 1702 PATypeHolder EltTy(Type::getVoidTy(Context)); 1703 if (ParseTypeRec(EltTy)) return true; 1704 1705 if (EltTy->isVoidTy()) 1706 return Error(TypeLoc, "array and vector element type cannot be void"); 1707 1708 if (ParseToken(isVector ? lltok::greater : lltok::rsquare, 1709 "expected end of sequential type")) 1710 return true; 1711 1712 if (isVector) { 1713 if (Size == 0) 1714 return Error(SizeLoc, "zero element vector is illegal"); 1715 if ((unsigned)Size != Size) 1716 return Error(SizeLoc, "size too large for vector"); 1717 if (!VectorType::isValidElementType(EltTy)) 1718 return Error(TypeLoc, "vector element type must be fp or integer"); 1719 Result = VectorType::get(EltTy, unsigned(Size)); 1720 } else { 1721 if (!ArrayType::isValidElementType(EltTy)) 1722 return Error(TypeLoc, "invalid array element type"); 1723 Result = HandleUpRefs(ArrayType::get(EltTy, Size)); 1724 } 1725 return false; 1726} 1727 1728//===----------------------------------------------------------------------===// 1729// Function Semantic Analysis. 1730//===----------------------------------------------------------------------===// 1731 1732LLParser::PerFunctionState::PerFunctionState(LLParser &p, Function &f, 1733 int functionNumber) 1734 : P(p), F(f), FunctionNumber(functionNumber) { 1735 1736 // Insert unnamed arguments into the NumberedVals list. 1737 for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 1738 AI != E; ++AI) 1739 if (!AI->hasName()) 1740 NumberedVals.push_back(AI); 1741} 1742 1743LLParser::PerFunctionState::~PerFunctionState() { 1744 // If there were any forward referenced non-basicblock values, delete them. 1745 for (std::map<std::string, std::pair<Value*, LocTy> >::iterator 1746 I = ForwardRefVals.begin(), E = ForwardRefVals.end(); I != E; ++I) 1747 if (!isa<BasicBlock>(I->second.first)) { 1748 I->second.first->replaceAllUsesWith( 1749 UndefValue::get(I->second.first->getType())); 1750 delete I->second.first; 1751 I->second.first = 0; 1752 } 1753 1754 for (std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1755 I = ForwardRefValIDs.begin(), E = ForwardRefValIDs.end(); I != E; ++I) 1756 if (!isa<BasicBlock>(I->second.first)) { 1757 I->second.first->replaceAllUsesWith( 1758 UndefValue::get(I->second.first->getType())); 1759 delete I->second.first; 1760 I->second.first = 0; 1761 } 1762} 1763 1764bool LLParser::PerFunctionState::FinishFunction() { 1765 // Check to see if someone took the address of labels in this block. 1766 if (!P.ForwardRefBlockAddresses.empty()) { 1767 ValID FunctionID; 1768 if (!F.getName().empty()) { 1769 FunctionID.Kind = ValID::t_GlobalName; 1770 FunctionID.StrVal = F.getName(); 1771 } else { 1772 FunctionID.Kind = ValID::t_GlobalID; 1773 FunctionID.UIntVal = FunctionNumber; 1774 } 1775 1776 std::map<ValID, std::vector<std::pair<ValID, GlobalValue*> > >::iterator 1777 FRBAI = P.ForwardRefBlockAddresses.find(FunctionID); 1778 if (FRBAI != P.ForwardRefBlockAddresses.end()) { 1779 // Resolve all these references. 1780 if (P.ResolveForwardRefBlockAddresses(&F, FRBAI->second, this)) 1781 return true; 1782 1783 P.ForwardRefBlockAddresses.erase(FRBAI); 1784 } 1785 } 1786 1787 if (!ForwardRefVals.empty()) 1788 return P.Error(ForwardRefVals.begin()->second.second, 1789 "use of undefined value '%" + ForwardRefVals.begin()->first + 1790 "'"); 1791 if (!ForwardRefValIDs.empty()) 1792 return P.Error(ForwardRefValIDs.begin()->second.second, 1793 "use of undefined value '%" + 1794 utostr(ForwardRefValIDs.begin()->first) + "'"); 1795 return false; 1796} 1797 1798 1799/// GetVal - Get a value with the specified name or ID, creating a 1800/// forward reference record if needed. This can return null if the value 1801/// exists but does not have the right type. 1802Value *LLParser::PerFunctionState::GetVal(const std::string &Name, 1803 const Type *Ty, LocTy Loc) { 1804 // Look this name up in the normal function symbol table. 1805 Value *Val = F.getValueSymbolTable().lookup(Name); 1806 1807 // If this is a forward reference for the value, see if we already created a 1808 // forward ref record. 1809 if (Val == 0) { 1810 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1811 I = ForwardRefVals.find(Name); 1812 if (I != ForwardRefVals.end()) 1813 Val = I->second.first; 1814 } 1815 1816 // If we have the value in the symbol table or fwd-ref table, return it. 1817 if (Val) { 1818 if (Val->getType() == Ty) return Val; 1819 if (Ty->isLabelTy()) 1820 P.Error(Loc, "'%" + Name + "' is not a basic block"); 1821 else 1822 P.Error(Loc, "'%" + Name + "' defined with type '" + 1823 Val->getType()->getDescription() + "'"); 1824 return 0; 1825 } 1826 1827 // Don't make placeholders with invalid type. 1828 if (!Ty->isFirstClassType() && !Ty->isOpaqueTy() && !Ty->isLabelTy()) { 1829 P.Error(Loc, "invalid use of a non-first-class type"); 1830 return 0; 1831 } 1832 1833 // Otherwise, create a new forward reference for this value and remember it. 1834 Value *FwdVal; 1835 if (Ty->isLabelTy()) 1836 FwdVal = BasicBlock::Create(F.getContext(), Name, &F); 1837 else 1838 FwdVal = new Argument(Ty, Name); 1839 1840 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 1841 return FwdVal; 1842} 1843 1844Value *LLParser::PerFunctionState::GetVal(unsigned ID, const Type *Ty, 1845 LocTy Loc) { 1846 // Look this name up in the normal function symbol table. 1847 Value *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 1848 1849 // If this is a forward reference for the value, see if we already created a 1850 // forward ref record. 1851 if (Val == 0) { 1852 std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1853 I = ForwardRefValIDs.find(ID); 1854 if (I != ForwardRefValIDs.end()) 1855 Val = I->second.first; 1856 } 1857 1858 // If we have the value in the symbol table or fwd-ref table, return it. 1859 if (Val) { 1860 if (Val->getType() == Ty) return Val; 1861 if (Ty->isLabelTy()) 1862 P.Error(Loc, "'%" + utostr(ID) + "' is not a basic block"); 1863 else 1864 P.Error(Loc, "'%" + utostr(ID) + "' defined with type '" + 1865 Val->getType()->getDescription() + "'"); 1866 return 0; 1867 } 1868 1869 if (!Ty->isFirstClassType() && !Ty->isOpaqueTy() && !Ty->isLabelTy()) { 1870 P.Error(Loc, "invalid use of a non-first-class type"); 1871 return 0; 1872 } 1873 1874 // Otherwise, create a new forward reference for this value and remember it. 1875 Value *FwdVal; 1876 if (Ty->isLabelTy()) 1877 FwdVal = BasicBlock::Create(F.getContext(), "", &F); 1878 else 1879 FwdVal = new Argument(Ty); 1880 1881 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 1882 return FwdVal; 1883} 1884 1885/// SetInstName - After an instruction is parsed and inserted into its 1886/// basic block, this installs its name. 1887bool LLParser::PerFunctionState::SetInstName(int NameID, 1888 const std::string &NameStr, 1889 LocTy NameLoc, Instruction *Inst) { 1890 // If this instruction has void type, it cannot have a name or ID specified. 1891 if (Inst->getType()->isVoidTy()) { 1892 if (NameID != -1 || !NameStr.empty()) 1893 return P.Error(NameLoc, "instructions returning void cannot have a name"); 1894 return false; 1895 } 1896 1897 // If this was a numbered instruction, verify that the instruction is the 1898 // expected value and resolve any forward references. 1899 if (NameStr.empty()) { 1900 // If neither a name nor an ID was specified, just use the next ID. 1901 if (NameID == -1) 1902 NameID = NumberedVals.size(); 1903 1904 if (unsigned(NameID) != NumberedVals.size()) 1905 return P.Error(NameLoc, "instruction expected to be numbered '%" + 1906 utostr(NumberedVals.size()) + "'"); 1907 1908 std::map<unsigned, std::pair<Value*, LocTy> >::iterator FI = 1909 ForwardRefValIDs.find(NameID); 1910 if (FI != ForwardRefValIDs.end()) { 1911 if (FI->second.first->getType() != Inst->getType()) 1912 return P.Error(NameLoc, "instruction forward referenced with type '" + 1913 FI->second.first->getType()->getDescription() + "'"); 1914 FI->second.first->replaceAllUsesWith(Inst); 1915 delete FI->second.first; 1916 ForwardRefValIDs.erase(FI); 1917 } 1918 1919 NumberedVals.push_back(Inst); 1920 return false; 1921 } 1922 1923 // Otherwise, the instruction had a name. Resolve forward refs and set it. 1924 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1925 FI = ForwardRefVals.find(NameStr); 1926 if (FI != ForwardRefVals.end()) { 1927 if (FI->second.first->getType() != Inst->getType()) 1928 return P.Error(NameLoc, "instruction forward referenced with type '" + 1929 FI->second.first->getType()->getDescription() + "'"); 1930 FI->second.first->replaceAllUsesWith(Inst); 1931 delete FI->second.first; 1932 ForwardRefVals.erase(FI); 1933 } 1934 1935 // Set the name on the instruction. 1936 Inst->setName(NameStr); 1937 1938 if (Inst->getNameStr() != NameStr) 1939 return P.Error(NameLoc, "multiple definition of local value named '" + 1940 NameStr + "'"); 1941 return false; 1942} 1943 1944/// GetBB - Get a basic block with the specified name or ID, creating a 1945/// forward reference record if needed. 1946BasicBlock *LLParser::PerFunctionState::GetBB(const std::string &Name, 1947 LocTy Loc) { 1948 return cast_or_null<BasicBlock>(GetVal(Name, 1949 Type::getLabelTy(F.getContext()), Loc)); 1950} 1951 1952BasicBlock *LLParser::PerFunctionState::GetBB(unsigned ID, LocTy Loc) { 1953 return cast_or_null<BasicBlock>(GetVal(ID, 1954 Type::getLabelTy(F.getContext()), Loc)); 1955} 1956 1957/// DefineBB - Define the specified basic block, which is either named or 1958/// unnamed. If there is an error, this returns null otherwise it returns 1959/// the block being defined. 1960BasicBlock *LLParser::PerFunctionState::DefineBB(const std::string &Name, 1961 LocTy Loc) { 1962 BasicBlock *BB; 1963 if (Name.empty()) 1964 BB = GetBB(NumberedVals.size(), Loc); 1965 else 1966 BB = GetBB(Name, Loc); 1967 if (BB == 0) return 0; // Already diagnosed error. 1968 1969 // Move the block to the end of the function. Forward ref'd blocks are 1970 // inserted wherever they happen to be referenced. 1971 F.getBasicBlockList().splice(F.end(), F.getBasicBlockList(), BB); 1972 1973 // Remove the block from forward ref sets. 1974 if (Name.empty()) { 1975 ForwardRefValIDs.erase(NumberedVals.size()); 1976 NumberedVals.push_back(BB); 1977 } else { 1978 // BB forward references are already in the function symbol table. 1979 ForwardRefVals.erase(Name); 1980 } 1981 1982 return BB; 1983} 1984 1985//===----------------------------------------------------------------------===// 1986// Constants. 1987//===----------------------------------------------------------------------===// 1988 1989/// ParseValID - Parse an abstract value that doesn't necessarily have a 1990/// type implied. For example, if we parse "4" we don't know what integer type 1991/// it has. The value will later be combined with its type and checked for 1992/// sanity. PFS is used to convert function-local operands of metadata (since 1993/// metadata operands are not just parsed here but also converted to values). 1994/// PFS can be null when we are not parsing metadata values inside a function. 1995bool LLParser::ParseValID(ValID &ID, PerFunctionState *PFS) { 1996 ID.Loc = Lex.getLoc(); 1997 switch (Lex.getKind()) { 1998 default: return TokError("expected value token"); 1999 case lltok::GlobalID: // @42 2000 ID.UIntVal = Lex.getUIntVal(); 2001 ID.Kind = ValID::t_GlobalID; 2002 break; 2003 case lltok::GlobalVar: // @foo 2004 ID.StrVal = Lex.getStrVal(); 2005 ID.Kind = ValID::t_GlobalName; 2006 break; 2007 case lltok::LocalVarID: // %42 2008 ID.UIntVal = Lex.getUIntVal(); 2009 ID.Kind = ValID::t_LocalID; 2010 break; 2011 case lltok::LocalVar: // %foo 2012 case lltok::StringConstant: // "foo" - FIXME: REMOVE IN LLVM 3.0 2013 ID.StrVal = Lex.getStrVal(); 2014 ID.Kind = ValID::t_LocalName; 2015 break; 2016 case lltok::exclaim: // !{...} MDNode, !"foo" MDString 2017 Lex.Lex(); 2018 2019 if (EatIfPresent(lltok::lbrace)) { 2020 SmallVector<Value*, 16> Elts; 2021 if (ParseMDNodeVector(Elts, PFS) || 2022 ParseToken(lltok::rbrace, "expected end of metadata node")) 2023 return true; 2024 2025 ID.MDNodeVal = MDNode::get(Context, Elts.data(), Elts.size()); 2026 ID.Kind = ValID::t_MDNode; 2027 return false; 2028 } 2029 2030 // Standalone metadata reference 2031 // !{ ..., !42, ... } 2032 if (Lex.getKind() == lltok::APSInt) { 2033 if (ParseMDNodeID(ID.MDNodeVal)) return true; 2034 ID.Kind = ValID::t_MDNode; 2035 return false; 2036 } 2037 2038 // MDString: 2039 // ::= '!' STRINGCONSTANT 2040 if (ParseMDString(ID.MDStringVal)) return true; 2041 ID.Kind = ValID::t_MDString; 2042 return false; 2043 case lltok::APSInt: 2044 ID.APSIntVal = Lex.getAPSIntVal(); 2045 ID.Kind = ValID::t_APSInt; 2046 break; 2047 case lltok::APFloat: 2048 ID.APFloatVal = Lex.getAPFloatVal(); 2049 ID.Kind = ValID::t_APFloat; 2050 break; 2051 case lltok::kw_true: 2052 ID.ConstantVal = ConstantInt::getTrue(Context); 2053 ID.Kind = ValID::t_Constant; 2054 break; 2055 case lltok::kw_false: 2056 ID.ConstantVal = ConstantInt::getFalse(Context); 2057 ID.Kind = ValID::t_Constant; 2058 break; 2059 case lltok::kw_null: ID.Kind = ValID::t_Null; break; 2060 case lltok::kw_undef: ID.Kind = ValID::t_Undef; break; 2061 case lltok::kw_zeroinitializer: ID.Kind = ValID::t_Zero; break; 2062 2063 case lltok::lbrace: { 2064 // ValID ::= '{' ConstVector '}' 2065 Lex.Lex(); 2066 SmallVector<Constant*, 16> Elts; 2067 if (ParseGlobalValueVector(Elts) || 2068 ParseToken(lltok::rbrace, "expected end of struct constant")) 2069 return true; 2070 2071 ID.ConstantVal = ConstantStruct::get(Context, Elts.data(), 2072 Elts.size(), false); 2073 ID.Kind = ValID::t_Constant; 2074 return false; 2075 } 2076 case lltok::less: { 2077 // ValID ::= '<' ConstVector '>' --> Vector. 2078 // ValID ::= '<' '{' ConstVector '}' '>' --> Packed Struct. 2079 Lex.Lex(); 2080 bool isPackedStruct = EatIfPresent(lltok::lbrace); 2081 2082 SmallVector<Constant*, 16> Elts; 2083 LocTy FirstEltLoc = Lex.getLoc(); 2084 if (ParseGlobalValueVector(Elts) || 2085 (isPackedStruct && 2086 ParseToken(lltok::rbrace, "expected end of packed struct")) || 2087 ParseToken(lltok::greater, "expected end of constant")) 2088 return true; 2089 2090 if (isPackedStruct) { 2091 ID.ConstantVal = 2092 ConstantStruct::get(Context, Elts.data(), Elts.size(), true); 2093 ID.Kind = ValID::t_Constant; 2094 return false; 2095 } 2096 2097 if (Elts.empty()) 2098 return Error(ID.Loc, "constant vector must not be empty"); 2099 2100 if (!Elts[0]->getType()->isIntegerTy() && 2101 !Elts[0]->getType()->isFloatingPointTy()) 2102 return Error(FirstEltLoc, 2103 "vector elements must have integer or floating point type"); 2104 2105 // Verify that all the vector elements have the same type. 2106 for (unsigned i = 1, e = Elts.size(); i != e; ++i) 2107 if (Elts[i]->getType() != Elts[0]->getType()) 2108 return Error(FirstEltLoc, 2109 "vector element #" + utostr(i) + 2110 " is not of type '" + Elts[0]->getType()->getDescription()); 2111 2112 ID.ConstantVal = ConstantVector::get(Elts.data(), Elts.size()); 2113 ID.Kind = ValID::t_Constant; 2114 return false; 2115 } 2116 case lltok::lsquare: { // Array Constant 2117 Lex.Lex(); 2118 SmallVector<Constant*, 16> Elts; 2119 LocTy FirstEltLoc = Lex.getLoc(); 2120 if (ParseGlobalValueVector(Elts) || 2121 ParseToken(lltok::rsquare, "expected end of array constant")) 2122 return true; 2123 2124 // Handle empty element. 2125 if (Elts.empty()) { 2126 // Use undef instead of an array because it's inconvenient to determine 2127 // the element type at this point, there being no elements to examine. 2128 ID.Kind = ValID::t_EmptyArray; 2129 return false; 2130 } 2131 2132 if (!Elts[0]->getType()->isFirstClassType()) 2133 return Error(FirstEltLoc, "invalid array element type: " + 2134 Elts[0]->getType()->getDescription()); 2135 2136 ArrayType *ATy = ArrayType::get(Elts[0]->getType(), Elts.size()); 2137 2138 // Verify all elements are correct type! 2139 for (unsigned i = 0, e = Elts.size(); i != e; ++i) { 2140 if (Elts[i]->getType() != Elts[0]->getType()) 2141 return Error(FirstEltLoc, 2142 "array element #" + utostr(i) + 2143 " is not of type '" +Elts[0]->getType()->getDescription()); 2144 } 2145 2146 ID.ConstantVal = ConstantArray::get(ATy, Elts.data(), Elts.size()); 2147 ID.Kind = ValID::t_Constant; 2148 return false; 2149 } 2150 case lltok::kw_c: // c "foo" 2151 Lex.Lex(); 2152 ID.ConstantVal = ConstantArray::get(Context, Lex.getStrVal(), false); 2153 if (ParseToken(lltok::StringConstant, "expected string")) return true; 2154 ID.Kind = ValID::t_Constant; 2155 return false; 2156 2157 case lltok::kw_asm: { 2158 // ValID ::= 'asm' SideEffect? AlignStack? STRINGCONSTANT ',' STRINGCONSTANT 2159 bool HasSideEffect, AlignStack; 2160 Lex.Lex(); 2161 if (ParseOptionalToken(lltok::kw_sideeffect, HasSideEffect) || 2162 ParseOptionalToken(lltok::kw_alignstack, AlignStack) || 2163 ParseStringConstant(ID.StrVal) || 2164 ParseToken(lltok::comma, "expected comma in inline asm expression") || 2165 ParseToken(lltok::StringConstant, "expected constraint string")) 2166 return true; 2167 ID.StrVal2 = Lex.getStrVal(); 2168 ID.UIntVal = unsigned(HasSideEffect) | (unsigned(AlignStack)<<1); 2169 ID.Kind = ValID::t_InlineAsm; 2170 return false; 2171 } 2172 2173 case lltok::kw_blockaddress: { 2174 // ValID ::= 'blockaddress' '(' @foo ',' %bar ')' 2175 Lex.Lex(); 2176 2177 ValID Fn, Label; 2178 LocTy FnLoc, LabelLoc; 2179 2180 if (ParseToken(lltok::lparen, "expected '(' in block address expression") || 2181 ParseValID(Fn) || 2182 ParseToken(lltok::comma, "expected comma in block address expression")|| 2183 ParseValID(Label) || 2184 ParseToken(lltok::rparen, "expected ')' in block address expression")) 2185 return true; 2186 2187 if (Fn.Kind != ValID::t_GlobalID && Fn.Kind != ValID::t_GlobalName) 2188 return Error(Fn.Loc, "expected function name in blockaddress"); 2189 if (Label.Kind != ValID::t_LocalID && Label.Kind != ValID::t_LocalName) 2190 return Error(Label.Loc, "expected basic block name in blockaddress"); 2191 2192 // Make a global variable as a placeholder for this reference. 2193 GlobalVariable *FwdRef = new GlobalVariable(*M, Type::getInt8Ty(Context), 2194 false, GlobalValue::InternalLinkage, 2195 0, ""); 2196 ForwardRefBlockAddresses[Fn].push_back(std::make_pair(Label, FwdRef)); 2197 ID.ConstantVal = FwdRef; 2198 ID.Kind = ValID::t_Constant; 2199 return false; 2200 } 2201 2202 case lltok::kw_trunc: 2203 case lltok::kw_zext: 2204 case lltok::kw_sext: 2205 case lltok::kw_fptrunc: 2206 case lltok::kw_fpext: 2207 case lltok::kw_bitcast: 2208 case lltok::kw_uitofp: 2209 case lltok::kw_sitofp: 2210 case lltok::kw_fptoui: 2211 case lltok::kw_fptosi: 2212 case lltok::kw_inttoptr: 2213 case lltok::kw_ptrtoint: { 2214 unsigned Opc = Lex.getUIntVal(); 2215 PATypeHolder DestTy(Type::getVoidTy(Context)); 2216 Constant *SrcVal; 2217 Lex.Lex(); 2218 if (ParseToken(lltok::lparen, "expected '(' after constantexpr cast") || 2219 ParseGlobalTypeAndValue(SrcVal) || 2220 ParseToken(lltok::kw_to, "expected 'to' in constantexpr cast") || 2221 ParseType(DestTy) || 2222 ParseToken(lltok::rparen, "expected ')' at end of constantexpr cast")) 2223 return true; 2224 if (!CastInst::castIsValid((Instruction::CastOps)Opc, SrcVal, DestTy)) 2225 return Error(ID.Loc, "invalid cast opcode for cast from '" + 2226 SrcVal->getType()->getDescription() + "' to '" + 2227 DestTy->getDescription() + "'"); 2228 ID.ConstantVal = ConstantExpr::getCast((Instruction::CastOps)Opc, 2229 SrcVal, DestTy); 2230 ID.Kind = ValID::t_Constant; 2231 return false; 2232 } 2233 case lltok::kw_extractvalue: { 2234 Lex.Lex(); 2235 Constant *Val; 2236 SmallVector<unsigned, 4> Indices; 2237 if (ParseToken(lltok::lparen, "expected '(' in extractvalue constantexpr")|| 2238 ParseGlobalTypeAndValue(Val) || 2239 ParseIndexList(Indices) || 2240 ParseToken(lltok::rparen, "expected ')' in extractvalue constantexpr")) 2241 return true; 2242 2243 if (!Val->getType()->isAggregateType()) 2244 return Error(ID.Loc, "extractvalue operand must be aggregate type"); 2245 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 2246 Indices.end())) 2247 return Error(ID.Loc, "invalid indices for extractvalue"); 2248 ID.ConstantVal = 2249 ConstantExpr::getExtractValue(Val, Indices.data(), Indices.size()); 2250 ID.Kind = ValID::t_Constant; 2251 return false; 2252 } 2253 case lltok::kw_insertvalue: { 2254 Lex.Lex(); 2255 Constant *Val0, *Val1; 2256 SmallVector<unsigned, 4> Indices; 2257 if (ParseToken(lltok::lparen, "expected '(' in insertvalue constantexpr")|| 2258 ParseGlobalTypeAndValue(Val0) || 2259 ParseToken(lltok::comma, "expected comma in insertvalue constantexpr")|| 2260 ParseGlobalTypeAndValue(Val1) || 2261 ParseIndexList(Indices) || 2262 ParseToken(lltok::rparen, "expected ')' in insertvalue constantexpr")) 2263 return true; 2264 if (!Val0->getType()->isAggregateType()) 2265 return Error(ID.Loc, "insertvalue operand must be aggregate type"); 2266 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 2267 Indices.end())) 2268 return Error(ID.Loc, "invalid indices for insertvalue"); 2269 ID.ConstantVal = ConstantExpr::getInsertValue(Val0, Val1, 2270 Indices.data(), Indices.size()); 2271 ID.Kind = ValID::t_Constant; 2272 return false; 2273 } 2274 case lltok::kw_icmp: 2275 case lltok::kw_fcmp: { 2276 unsigned PredVal, Opc = Lex.getUIntVal(); 2277 Constant *Val0, *Val1; 2278 Lex.Lex(); 2279 if (ParseCmpPredicate(PredVal, Opc) || 2280 ParseToken(lltok::lparen, "expected '(' in compare constantexpr") || 2281 ParseGlobalTypeAndValue(Val0) || 2282 ParseToken(lltok::comma, "expected comma in compare constantexpr") || 2283 ParseGlobalTypeAndValue(Val1) || 2284 ParseToken(lltok::rparen, "expected ')' in compare constantexpr")) 2285 return true; 2286 2287 if (Val0->getType() != Val1->getType()) 2288 return Error(ID.Loc, "compare operands must have the same type"); 2289 2290 CmpInst::Predicate Pred = (CmpInst::Predicate)PredVal; 2291 2292 if (Opc == Instruction::FCmp) { 2293 if (!Val0->getType()->isFPOrFPVectorTy()) 2294 return Error(ID.Loc, "fcmp requires floating point operands"); 2295 ID.ConstantVal = ConstantExpr::getFCmp(Pred, Val0, Val1); 2296 } else { 2297 assert(Opc == Instruction::ICmp && "Unexpected opcode for CmpInst!"); 2298 if (!Val0->getType()->isIntOrIntVectorTy() && 2299 !Val0->getType()->isPointerTy()) 2300 return Error(ID.Loc, "icmp requires pointer or integer operands"); 2301 ID.ConstantVal = ConstantExpr::getICmp(Pred, Val0, Val1); 2302 } 2303 ID.Kind = ValID::t_Constant; 2304 return false; 2305 } 2306 2307 // Binary Operators. 2308 case lltok::kw_add: 2309 case lltok::kw_fadd: 2310 case lltok::kw_sub: 2311 case lltok::kw_fsub: 2312 case lltok::kw_mul: 2313 case lltok::kw_fmul: 2314 case lltok::kw_udiv: 2315 case lltok::kw_sdiv: 2316 case lltok::kw_fdiv: 2317 case lltok::kw_urem: 2318 case lltok::kw_srem: 2319 case lltok::kw_frem: { 2320 bool NUW = false; 2321 bool NSW = false; 2322 bool Exact = false; 2323 unsigned Opc = Lex.getUIntVal(); 2324 Constant *Val0, *Val1; 2325 Lex.Lex(); 2326 LocTy ModifierLoc = Lex.getLoc(); 2327 if (Opc == Instruction::Add || 2328 Opc == Instruction::Sub || 2329 Opc == Instruction::Mul) { 2330 if (EatIfPresent(lltok::kw_nuw)) 2331 NUW = true; 2332 if (EatIfPresent(lltok::kw_nsw)) { 2333 NSW = true; 2334 if (EatIfPresent(lltok::kw_nuw)) 2335 NUW = true; 2336 } 2337 } else if (Opc == Instruction::SDiv) { 2338 if (EatIfPresent(lltok::kw_exact)) 2339 Exact = true; 2340 } 2341 if (ParseToken(lltok::lparen, "expected '(' in binary constantexpr") || 2342 ParseGlobalTypeAndValue(Val0) || 2343 ParseToken(lltok::comma, "expected comma in binary constantexpr") || 2344 ParseGlobalTypeAndValue(Val1) || 2345 ParseToken(lltok::rparen, "expected ')' in binary constantexpr")) 2346 return true; 2347 if (Val0->getType() != Val1->getType()) 2348 return Error(ID.Loc, "operands of constexpr must have same type"); 2349 if (!Val0->getType()->isIntOrIntVectorTy()) { 2350 if (NUW) 2351 return Error(ModifierLoc, "nuw only applies to integer operations"); 2352 if (NSW) 2353 return Error(ModifierLoc, "nsw only applies to integer operations"); 2354 } 2355 // API compatibility: Accept either integer or floating-point types with 2356 // add, sub, and mul. 2357 if (!Val0->getType()->isIntOrIntVectorTy() && 2358 !Val0->getType()->isFPOrFPVectorTy()) 2359 return Error(ID.Loc,"constexpr requires integer, fp, or vector operands"); 2360 unsigned Flags = 0; 2361 if (NUW) Flags |= OverflowingBinaryOperator::NoUnsignedWrap; 2362 if (NSW) Flags |= OverflowingBinaryOperator::NoSignedWrap; 2363 if (Exact) Flags |= SDivOperator::IsExact; 2364 Constant *C = ConstantExpr::get(Opc, Val0, Val1, Flags); 2365 ID.ConstantVal = C; 2366 ID.Kind = ValID::t_Constant; 2367 return false; 2368 } 2369 2370 // Logical Operations 2371 case lltok::kw_shl: 2372 case lltok::kw_lshr: 2373 case lltok::kw_ashr: 2374 case lltok::kw_and: 2375 case lltok::kw_or: 2376 case lltok::kw_xor: { 2377 unsigned Opc = Lex.getUIntVal(); 2378 Constant *Val0, *Val1; 2379 Lex.Lex(); 2380 if (ParseToken(lltok::lparen, "expected '(' in logical constantexpr") || 2381 ParseGlobalTypeAndValue(Val0) || 2382 ParseToken(lltok::comma, "expected comma in logical constantexpr") || 2383 ParseGlobalTypeAndValue(Val1) || 2384 ParseToken(lltok::rparen, "expected ')' in logical constantexpr")) 2385 return true; 2386 if (Val0->getType() != Val1->getType()) 2387 return Error(ID.Loc, "operands of constexpr must have same type"); 2388 if (!Val0->getType()->isIntOrIntVectorTy()) 2389 return Error(ID.Loc, 2390 "constexpr requires integer or integer vector operands"); 2391 ID.ConstantVal = ConstantExpr::get(Opc, Val0, Val1); 2392 ID.Kind = ValID::t_Constant; 2393 return false; 2394 } 2395 2396 case lltok::kw_getelementptr: 2397 case lltok::kw_shufflevector: 2398 case lltok::kw_insertelement: 2399 case lltok::kw_extractelement: 2400 case lltok::kw_select: { 2401 unsigned Opc = Lex.getUIntVal(); 2402 SmallVector<Constant*, 16> Elts; 2403 bool InBounds = false; 2404 Lex.Lex(); 2405 if (Opc == Instruction::GetElementPtr) 2406 InBounds = EatIfPresent(lltok::kw_inbounds); 2407 if (ParseToken(lltok::lparen, "expected '(' in constantexpr") || 2408 ParseGlobalValueVector(Elts) || 2409 ParseToken(lltok::rparen, "expected ')' in constantexpr")) 2410 return true; 2411 2412 if (Opc == Instruction::GetElementPtr) { 2413 if (Elts.size() == 0 || !Elts[0]->getType()->isPointerTy()) 2414 return Error(ID.Loc, "getelementptr requires pointer operand"); 2415 2416 if (!GetElementPtrInst::getIndexedType(Elts[0]->getType(), 2417 (Value**)(Elts.data() + 1), 2418 Elts.size() - 1)) 2419 return Error(ID.Loc, "invalid indices for getelementptr"); 2420 ID.ConstantVal = InBounds ? 2421 ConstantExpr::getInBoundsGetElementPtr(Elts[0], 2422 Elts.data() + 1, 2423 Elts.size() - 1) : 2424 ConstantExpr::getGetElementPtr(Elts[0], 2425 Elts.data() + 1, Elts.size() - 1); 2426 } else if (Opc == Instruction::Select) { 2427 if (Elts.size() != 3) 2428 return Error(ID.Loc, "expected three operands to select"); 2429 if (const char *Reason = SelectInst::areInvalidOperands(Elts[0], Elts[1], 2430 Elts[2])) 2431 return Error(ID.Loc, Reason); 2432 ID.ConstantVal = ConstantExpr::getSelect(Elts[0], Elts[1], Elts[2]); 2433 } else if (Opc == Instruction::ShuffleVector) { 2434 if (Elts.size() != 3) 2435 return Error(ID.Loc, "expected three operands to shufflevector"); 2436 if (!ShuffleVectorInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2437 return Error(ID.Loc, "invalid operands to shufflevector"); 2438 ID.ConstantVal = 2439 ConstantExpr::getShuffleVector(Elts[0], Elts[1],Elts[2]); 2440 } else if (Opc == Instruction::ExtractElement) { 2441 if (Elts.size() != 2) 2442 return Error(ID.Loc, "expected two operands to extractelement"); 2443 if (!ExtractElementInst::isValidOperands(Elts[0], Elts[1])) 2444 return Error(ID.Loc, "invalid extractelement operands"); 2445 ID.ConstantVal = ConstantExpr::getExtractElement(Elts[0], Elts[1]); 2446 } else { 2447 assert(Opc == Instruction::InsertElement && "Unknown opcode"); 2448 if (Elts.size() != 3) 2449 return Error(ID.Loc, "expected three operands to insertelement"); 2450 if (!InsertElementInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2451 return Error(ID.Loc, "invalid insertelement operands"); 2452 ID.ConstantVal = 2453 ConstantExpr::getInsertElement(Elts[0], Elts[1],Elts[2]); 2454 } 2455 2456 ID.Kind = ValID::t_Constant; 2457 return false; 2458 } 2459 } 2460 2461 Lex.Lex(); 2462 return false; 2463} 2464 2465/// ParseGlobalValue - Parse a global value with the specified type. 2466bool LLParser::ParseGlobalValue(const Type *Ty, Constant *&C) { 2467 C = 0; 2468 ValID ID; 2469 Value *V = NULL; 2470 bool Parsed = ParseValID(ID) || 2471 ConvertValIDToValue(Ty, ID, V, NULL); 2472 if (V && !(C = dyn_cast<Constant>(V))) 2473 return Error(ID.Loc, "global values must be constants"); 2474 return Parsed; 2475} 2476 2477bool LLParser::ParseGlobalTypeAndValue(Constant *&V) { 2478 PATypeHolder Type(Type::getVoidTy(Context)); 2479 return ParseType(Type) || 2480 ParseGlobalValue(Type, V); 2481} 2482 2483/// ParseGlobalValueVector 2484/// ::= /*empty*/ 2485/// ::= TypeAndValue (',' TypeAndValue)* 2486bool LLParser::ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts) { 2487 // Empty list. 2488 if (Lex.getKind() == lltok::rbrace || 2489 Lex.getKind() == lltok::rsquare || 2490 Lex.getKind() == lltok::greater || 2491 Lex.getKind() == lltok::rparen) 2492 return false; 2493 2494 Constant *C; 2495 if (ParseGlobalTypeAndValue(C)) return true; 2496 Elts.push_back(C); 2497 2498 while (EatIfPresent(lltok::comma)) { 2499 if (ParseGlobalTypeAndValue(C)) return true; 2500 Elts.push_back(C); 2501 } 2502 2503 return false; 2504} 2505 2506 2507//===----------------------------------------------------------------------===// 2508// Function Parsing. 2509//===----------------------------------------------------------------------===// 2510 2511bool LLParser::ConvertValIDToValue(const Type *Ty, ValID &ID, Value *&V, 2512 PerFunctionState *PFS) { 2513 if (Ty->isFunctionTy()) 2514 return Error(ID.Loc, "functions are not values, refer to them as pointers"); 2515 2516 switch (ID.Kind) { 2517 default: llvm_unreachable("Unknown ValID!"); 2518 case ValID::t_LocalID: 2519 if (!PFS) return Error(ID.Loc, "invalid use of function-local name"); 2520 V = PFS->GetVal(ID.UIntVal, Ty, ID.Loc); 2521 return (V == 0); 2522 case ValID::t_LocalName: 2523 if (!PFS) return Error(ID.Loc, "invalid use of function-local name"); 2524 V = PFS->GetVal(ID.StrVal, Ty, ID.Loc); 2525 return (V == 0); 2526 case ValID::t_InlineAsm: { 2527 const PointerType *PTy = dyn_cast<PointerType>(Ty); 2528 const FunctionType *FTy = 2529 PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : 0; 2530 if (!FTy || !InlineAsm::Verify(FTy, ID.StrVal2)) 2531 return Error(ID.Loc, "invalid type for inline asm constraint string"); 2532 V = InlineAsm::get(FTy, ID.StrVal, ID.StrVal2, ID.UIntVal&1, ID.UIntVal>>1); 2533 return false; 2534 } 2535 case ValID::t_MDNode: 2536 if (!Ty->isMetadataTy()) 2537 return Error(ID.Loc, "metadata value must have metadata type"); 2538 V = ID.MDNodeVal; 2539 return false; 2540 case ValID::t_MDString: 2541 if (!Ty->isMetadataTy()) 2542 return Error(ID.Loc, "metadata value must have metadata type"); 2543 V = ID.MDStringVal; 2544 return false; 2545 case ValID::t_GlobalName: 2546 V = GetGlobalVal(ID.StrVal, Ty, ID.Loc); 2547 return V == 0; 2548 case ValID::t_GlobalID: 2549 V = GetGlobalVal(ID.UIntVal, Ty, ID.Loc); 2550 return V == 0; 2551 case ValID::t_APSInt: 2552 if (!Ty->isIntegerTy()) 2553 return Error(ID.Loc, "integer constant must have integer type"); 2554 ID.APSIntVal.extOrTrunc(Ty->getPrimitiveSizeInBits()); 2555 V = ConstantInt::get(Context, ID.APSIntVal); 2556 return false; 2557 case ValID::t_APFloat: 2558 if (!Ty->isFloatingPointTy() || 2559 !ConstantFP::isValueValidForType(Ty, ID.APFloatVal)) 2560 return Error(ID.Loc, "floating point constant invalid for type"); 2561 2562 // The lexer has no type info, so builds all float and double FP constants 2563 // as double. Fix this here. Long double does not need this. 2564 if (&ID.APFloatVal.getSemantics() == &APFloat::IEEEdouble && 2565 Ty->isFloatTy()) { 2566 bool Ignored; 2567 ID.APFloatVal.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, 2568 &Ignored); 2569 } 2570 V = ConstantFP::get(Context, ID.APFloatVal); 2571 2572 if (V->getType() != Ty) 2573 return Error(ID.Loc, "floating point constant does not have type '" + 2574 Ty->getDescription() + "'"); 2575 2576 return false; 2577 case ValID::t_Null: 2578 if (!Ty->isPointerTy()) 2579 return Error(ID.Loc, "null must be a pointer type"); 2580 V = ConstantPointerNull::get(cast<PointerType>(Ty)); 2581 return false; 2582 case ValID::t_Undef: 2583 // FIXME: LabelTy should not be a first-class type. 2584 if ((!Ty->isFirstClassType() || Ty->isLabelTy()) && 2585 !Ty->isOpaqueTy()) 2586 return Error(ID.Loc, "invalid type for undef constant"); 2587 V = UndefValue::get(Ty); 2588 return false; 2589 case ValID::t_EmptyArray: 2590 if (!Ty->isArrayTy() || cast<ArrayType>(Ty)->getNumElements() != 0) 2591 return Error(ID.Loc, "invalid empty array initializer"); 2592 V = UndefValue::get(Ty); 2593 return false; 2594 case ValID::t_Zero: 2595 // FIXME: LabelTy should not be a first-class type. 2596 if (!Ty->isFirstClassType() || Ty->isLabelTy()) 2597 return Error(ID.Loc, "invalid type for null constant"); 2598 V = Constant::getNullValue(Ty); 2599 return false; 2600 case ValID::t_Constant: 2601 if (ID.ConstantVal->getType() != Ty) { 2602 // Allow a constant struct with a single member to be converted 2603 // to a union, if the union has a member which is the same type 2604 // as the struct member. 2605 if (const UnionType* utype = dyn_cast<UnionType>(Ty)) { 2606 return ParseUnionValue(utype, ID, V); 2607 } 2608 2609 return Error(ID.Loc, "constant expression type mismatch"); 2610 } 2611 2612 V = ID.ConstantVal; 2613 return false; 2614 } 2615} 2616 2617bool LLParser::ParseValue(const Type *Ty, Value *&V, PerFunctionState &PFS) { 2618 V = 0; 2619 ValID ID; 2620 return ParseValID(ID, &PFS) || 2621 ConvertValIDToValue(Ty, ID, V, &PFS); 2622} 2623 2624bool LLParser::ParseTypeAndValue(Value *&V, PerFunctionState &PFS) { 2625 PATypeHolder T(Type::getVoidTy(Context)); 2626 return ParseType(T) || 2627 ParseValue(T, V, PFS); 2628} 2629 2630bool LLParser::ParseTypeAndBasicBlock(BasicBlock *&BB, LocTy &Loc, 2631 PerFunctionState &PFS) { 2632 Value *V; 2633 Loc = Lex.getLoc(); 2634 if (ParseTypeAndValue(V, PFS)) return true; 2635 if (!isa<BasicBlock>(V)) 2636 return Error(Loc, "expected a basic block"); 2637 BB = cast<BasicBlock>(V); 2638 return false; 2639} 2640 2641bool LLParser::ParseUnionValue(const UnionType* utype, ValID &ID, Value *&V) { 2642 if (const StructType* stype = dyn_cast<StructType>(ID.ConstantVal->getType())) { 2643 if (stype->getNumContainedTypes() != 1) 2644 return Error(ID.Loc, "constant expression type mismatch"); 2645 int index = utype->getElementTypeIndex(stype->getContainedType(0)); 2646 if (index < 0) 2647 return Error(ID.Loc, "initializer type is not a member of the union"); 2648 2649 V = ConstantUnion::get( 2650 utype, cast<Constant>(ID.ConstantVal->getOperand(0))); 2651 return false; 2652 } 2653 2654 return Error(ID.Loc, "constant expression type mismatch"); 2655} 2656 2657 2658/// FunctionHeader 2659/// ::= OptionalLinkage OptionalVisibility OptionalCallingConv OptRetAttrs 2660/// Type GlobalName '(' ArgList ')' OptFuncAttrs OptSection 2661/// OptionalAlign OptGC 2662bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) { 2663 // Parse the linkage. 2664 LocTy LinkageLoc = Lex.getLoc(); 2665 unsigned Linkage; 2666 2667 unsigned Visibility, RetAttrs; 2668 CallingConv::ID CC; 2669 PATypeHolder RetType(Type::getVoidTy(Context)); 2670 LocTy RetTypeLoc = Lex.getLoc(); 2671 if (ParseOptionalLinkage(Linkage) || 2672 ParseOptionalVisibility(Visibility) || 2673 ParseOptionalCallingConv(CC) || 2674 ParseOptionalAttrs(RetAttrs, 1) || 2675 ParseType(RetType, RetTypeLoc, true /*void allowed*/)) 2676 return true; 2677 2678 // Verify that the linkage is ok. 2679 switch ((GlobalValue::LinkageTypes)Linkage) { 2680 case GlobalValue::ExternalLinkage: 2681 break; // always ok. 2682 case GlobalValue::DLLImportLinkage: 2683 case GlobalValue::ExternalWeakLinkage: 2684 if (isDefine) 2685 return Error(LinkageLoc, "invalid linkage for function definition"); 2686 break; 2687 case GlobalValue::PrivateLinkage: 2688 case GlobalValue::LinkerPrivateLinkage: 2689 case GlobalValue::InternalLinkage: 2690 case GlobalValue::AvailableExternallyLinkage: 2691 case GlobalValue::LinkOnceAnyLinkage: 2692 case GlobalValue::LinkOnceODRLinkage: 2693 case GlobalValue::WeakAnyLinkage: 2694 case GlobalValue::WeakODRLinkage: 2695 case GlobalValue::DLLExportLinkage: 2696 if (!isDefine) 2697 return Error(LinkageLoc, "invalid linkage for function declaration"); 2698 break; 2699 case GlobalValue::AppendingLinkage: 2700 case GlobalValue::CommonLinkage: 2701 return Error(LinkageLoc, "invalid function linkage type"); 2702 } 2703 2704 if (!FunctionType::isValidReturnType(RetType) || 2705 RetType->isOpaqueTy()) 2706 return Error(RetTypeLoc, "invalid function return type"); 2707 2708 LocTy NameLoc = Lex.getLoc(); 2709 2710 std::string FunctionName; 2711 if (Lex.getKind() == lltok::GlobalVar) { 2712 FunctionName = Lex.getStrVal(); 2713 } else if (Lex.getKind() == lltok::GlobalID) { // @42 is ok. 2714 unsigned NameID = Lex.getUIntVal(); 2715 2716 if (NameID != NumberedVals.size()) 2717 return TokError("function expected to be numbered '%" + 2718 utostr(NumberedVals.size()) + "'"); 2719 } else { 2720 return TokError("expected function name"); 2721 } 2722 2723 Lex.Lex(); 2724 2725 if (Lex.getKind() != lltok::lparen) 2726 return TokError("expected '(' in function argument list"); 2727 2728 std::vector<ArgInfo> ArgList; 2729 bool isVarArg; 2730 unsigned FuncAttrs; 2731 std::string Section; 2732 unsigned Alignment; 2733 std::string GC; 2734 2735 if (ParseArgumentList(ArgList, isVarArg, false) || 2736 ParseOptionalAttrs(FuncAttrs, 2) || 2737 (EatIfPresent(lltok::kw_section) && 2738 ParseStringConstant(Section)) || 2739 ParseOptionalAlignment(Alignment) || 2740 (EatIfPresent(lltok::kw_gc) && 2741 ParseStringConstant(GC))) 2742 return true; 2743 2744 // If the alignment was parsed as an attribute, move to the alignment field. 2745 if (FuncAttrs & Attribute::Alignment) { 2746 Alignment = Attribute::getAlignmentFromAttrs(FuncAttrs); 2747 FuncAttrs &= ~Attribute::Alignment; 2748 } 2749 2750 // Okay, if we got here, the function is syntactically valid. Convert types 2751 // and do semantic checks. 2752 std::vector<const Type*> ParamTypeList; 2753 SmallVector<AttributeWithIndex, 8> Attrs; 2754 // FIXME : In 3.0, stop accepting zext, sext and inreg as optional function 2755 // attributes. 2756 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 2757 if (FuncAttrs & ObsoleteFuncAttrs) { 2758 RetAttrs |= FuncAttrs & ObsoleteFuncAttrs; 2759 FuncAttrs &= ~ObsoleteFuncAttrs; 2760 } 2761 2762 if (RetAttrs != Attribute::None) 2763 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 2764 2765 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 2766 ParamTypeList.push_back(ArgList[i].Type); 2767 if (ArgList[i].Attrs != Attribute::None) 2768 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 2769 } 2770 2771 if (FuncAttrs != Attribute::None) 2772 Attrs.push_back(AttributeWithIndex::get(~0, FuncAttrs)); 2773 2774 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 2775 2776 if (PAL.paramHasAttr(1, Attribute::StructRet) && !RetType->isVoidTy()) 2777 return Error(RetTypeLoc, "functions with 'sret' argument must return void"); 2778 2779 const FunctionType *FT = 2780 FunctionType::get(RetType, ParamTypeList, isVarArg); 2781 const PointerType *PFT = PointerType::getUnqual(FT); 2782 2783 Fn = 0; 2784 if (!FunctionName.empty()) { 2785 // If this was a definition of a forward reference, remove the definition 2786 // from the forward reference table and fill in the forward ref. 2787 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator FRVI = 2788 ForwardRefVals.find(FunctionName); 2789 if (FRVI != ForwardRefVals.end()) { 2790 Fn = M->getFunction(FunctionName); 2791 ForwardRefVals.erase(FRVI); 2792 } else if ((Fn = M->getFunction(FunctionName))) { 2793 // If this function already exists in the symbol table, then it is 2794 // multiply defined. We accept a few cases for old backwards compat. 2795 // FIXME: Remove this stuff for LLVM 3.0. 2796 if (Fn->getType() != PFT || Fn->getAttributes() != PAL || 2797 (!Fn->isDeclaration() && isDefine)) { 2798 // If the redefinition has different type or different attributes, 2799 // reject it. If both have bodies, reject it. 2800 return Error(NameLoc, "invalid redefinition of function '" + 2801 FunctionName + "'"); 2802 } else if (Fn->isDeclaration()) { 2803 // Make sure to strip off any argument names so we can't get conflicts. 2804 for (Function::arg_iterator AI = Fn->arg_begin(), AE = Fn->arg_end(); 2805 AI != AE; ++AI) 2806 AI->setName(""); 2807 } 2808 } else if (M->getNamedValue(FunctionName)) { 2809 return Error(NameLoc, "redefinition of function '@" + FunctionName + "'"); 2810 } 2811 2812 } else { 2813 // If this is a definition of a forward referenced function, make sure the 2814 // types agree. 2815 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator I 2816 = ForwardRefValIDs.find(NumberedVals.size()); 2817 if (I != ForwardRefValIDs.end()) { 2818 Fn = cast<Function>(I->second.first); 2819 if (Fn->getType() != PFT) 2820 return Error(NameLoc, "type of definition and forward reference of '@" + 2821 utostr(NumberedVals.size()) +"' disagree"); 2822 ForwardRefValIDs.erase(I); 2823 } 2824 } 2825 2826 if (Fn == 0) 2827 Fn = Function::Create(FT, GlobalValue::ExternalLinkage, FunctionName, M); 2828 else // Move the forward-reference to the correct spot in the module. 2829 M->getFunctionList().splice(M->end(), M->getFunctionList(), Fn); 2830 2831 if (FunctionName.empty()) 2832 NumberedVals.push_back(Fn); 2833 2834 Fn->setLinkage((GlobalValue::LinkageTypes)Linkage); 2835 Fn->setVisibility((GlobalValue::VisibilityTypes)Visibility); 2836 Fn->setCallingConv(CC); 2837 Fn->setAttributes(PAL); 2838 Fn->setAlignment(Alignment); 2839 Fn->setSection(Section); 2840 if (!GC.empty()) Fn->setGC(GC.c_str()); 2841 2842 // Add all of the arguments we parsed to the function. 2843 Function::arg_iterator ArgIt = Fn->arg_begin(); 2844 for (unsigned i = 0, e = ArgList.size(); i != e; ++i, ++ArgIt) { 2845 // If we run out of arguments in the Function prototype, exit early. 2846 // FIXME: REMOVE THIS IN LLVM 3.0, this is just for the mismatch case above. 2847 if (ArgIt == Fn->arg_end()) break; 2848 2849 // If the argument has a name, insert it into the argument symbol table. 2850 if (ArgList[i].Name.empty()) continue; 2851 2852 // Set the name, if it conflicted, it will be auto-renamed. 2853 ArgIt->setName(ArgList[i].Name); 2854 2855 if (ArgIt->getNameStr() != ArgList[i].Name) 2856 return Error(ArgList[i].Loc, "redefinition of argument '%" + 2857 ArgList[i].Name + "'"); 2858 } 2859 2860 return false; 2861} 2862 2863 2864/// ParseFunctionBody 2865/// ::= '{' BasicBlock+ '}' 2866/// ::= 'begin' BasicBlock+ 'end' // FIXME: remove in LLVM 3.0 2867/// 2868bool LLParser::ParseFunctionBody(Function &Fn) { 2869 if (Lex.getKind() != lltok::lbrace && Lex.getKind() != lltok::kw_begin) 2870 return TokError("expected '{' in function body"); 2871 Lex.Lex(); // eat the {. 2872 2873 int FunctionNumber = -1; 2874 if (!Fn.hasName()) FunctionNumber = NumberedVals.size()-1; 2875 2876 PerFunctionState PFS(*this, Fn, FunctionNumber); 2877 2878 // We need at least one basic block. 2879 if (Lex.getKind() == lltok::rbrace || Lex.getKind() == lltok::kw_end) 2880 return TokError("function body requires at least one basic block"); 2881 2882 while (Lex.getKind() != lltok::rbrace && Lex.getKind() != lltok::kw_end) 2883 if (ParseBasicBlock(PFS)) return true; 2884 2885 // Eat the }. 2886 Lex.Lex(); 2887 2888 // Verify function is ok. 2889 return PFS.FinishFunction(); 2890} 2891 2892/// ParseBasicBlock 2893/// ::= LabelStr? Instruction* 2894bool LLParser::ParseBasicBlock(PerFunctionState &PFS) { 2895 // If this basic block starts out with a name, remember it. 2896 std::string Name; 2897 LocTy NameLoc = Lex.getLoc(); 2898 if (Lex.getKind() == lltok::LabelStr) { 2899 Name = Lex.getStrVal(); 2900 Lex.Lex(); 2901 } 2902 2903 BasicBlock *BB = PFS.DefineBB(Name, NameLoc); 2904 if (BB == 0) return true; 2905 2906 std::string NameStr; 2907 2908 // Parse the instructions in this block until we get a terminator. 2909 Instruction *Inst; 2910 SmallVector<std::pair<unsigned, MDNode *>, 4> MetadataOnInst; 2911 do { 2912 // This instruction may have three possibilities for a name: a) none 2913 // specified, b) name specified "%foo =", c) number specified: "%4 =". 2914 LocTy NameLoc = Lex.getLoc(); 2915 int NameID = -1; 2916 NameStr = ""; 2917 2918 if (Lex.getKind() == lltok::LocalVarID) { 2919 NameID = Lex.getUIntVal(); 2920 Lex.Lex(); 2921 if (ParseToken(lltok::equal, "expected '=' after instruction id")) 2922 return true; 2923 } else if (Lex.getKind() == lltok::LocalVar || 2924 // FIXME: REMOVE IN LLVM 3.0 2925 Lex.getKind() == lltok::StringConstant) { 2926 NameStr = Lex.getStrVal(); 2927 Lex.Lex(); 2928 if (ParseToken(lltok::equal, "expected '=' after instruction name")) 2929 return true; 2930 } 2931 2932 switch (ParseInstruction(Inst, BB, PFS)) { 2933 default: assert(0 && "Unknown ParseInstruction result!"); 2934 case InstError: return true; 2935 case InstNormal: 2936 // With a normal result, we check to see if the instruction is followed by 2937 // a comma and metadata. 2938 if (EatIfPresent(lltok::comma)) 2939 if (ParseInstructionMetadata(Inst)) 2940 return true; 2941 break; 2942 case InstExtraComma: 2943 // If the instruction parser ate an extra comma at the end of it, it 2944 // *must* be followed by metadata. 2945 if (ParseInstructionMetadata(Inst)) 2946 return true; 2947 break; 2948 } 2949 2950 BB->getInstList().push_back(Inst); 2951 2952 // Set the name on the instruction. 2953 if (PFS.SetInstName(NameID, NameStr, NameLoc, Inst)) return true; 2954 } while (!isa<TerminatorInst>(Inst)); 2955 2956 return false; 2957} 2958 2959//===----------------------------------------------------------------------===// 2960// Instruction Parsing. 2961//===----------------------------------------------------------------------===// 2962 2963/// ParseInstruction - Parse one of the many different instructions. 2964/// 2965int LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB, 2966 PerFunctionState &PFS) { 2967 lltok::Kind Token = Lex.getKind(); 2968 if (Token == lltok::Eof) 2969 return TokError("found end of file when expecting more instructions"); 2970 LocTy Loc = Lex.getLoc(); 2971 unsigned KeywordVal = Lex.getUIntVal(); 2972 Lex.Lex(); // Eat the keyword. 2973 2974 switch (Token) { 2975 default: return Error(Loc, "expected instruction opcode"); 2976 // Terminator Instructions. 2977 case lltok::kw_unwind: Inst = new UnwindInst(Context); return false; 2978 case lltok::kw_unreachable: Inst = new UnreachableInst(Context); return false; 2979 case lltok::kw_ret: return ParseRet(Inst, BB, PFS); 2980 case lltok::kw_br: return ParseBr(Inst, PFS); 2981 case lltok::kw_switch: return ParseSwitch(Inst, PFS); 2982 case lltok::kw_indirectbr: return ParseIndirectBr(Inst, PFS); 2983 case lltok::kw_invoke: return ParseInvoke(Inst, PFS); 2984 // Binary Operators. 2985 case lltok::kw_add: 2986 case lltok::kw_sub: 2987 case lltok::kw_mul: { 2988 bool NUW = false; 2989 bool NSW = false; 2990 LocTy ModifierLoc = Lex.getLoc(); 2991 if (EatIfPresent(lltok::kw_nuw)) 2992 NUW = true; 2993 if (EatIfPresent(lltok::kw_nsw)) { 2994 NSW = true; 2995 if (EatIfPresent(lltok::kw_nuw)) 2996 NUW = true; 2997 } 2998 // API compatibility: Accept either integer or floating-point types. 2999 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 0); 3000 if (!Result) { 3001 if (!Inst->getType()->isIntOrIntVectorTy()) { 3002 if (NUW) 3003 return Error(ModifierLoc, "nuw only applies to integer operations"); 3004 if (NSW) 3005 return Error(ModifierLoc, "nsw only applies to integer operations"); 3006 } 3007 if (NUW) 3008 cast<BinaryOperator>(Inst)->setHasNoUnsignedWrap(true); 3009 if (NSW) 3010 cast<BinaryOperator>(Inst)->setHasNoSignedWrap(true); 3011 } 3012 return Result; 3013 } 3014 case lltok::kw_fadd: 3015 case lltok::kw_fsub: 3016 case lltok::kw_fmul: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 3017 3018 case lltok::kw_sdiv: { 3019 bool Exact = false; 3020 if (EatIfPresent(lltok::kw_exact)) 3021 Exact = true; 3022 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 1); 3023 if (!Result) 3024 if (Exact) 3025 cast<BinaryOperator>(Inst)->setIsExact(true); 3026 return Result; 3027 } 3028 3029 case lltok::kw_udiv: 3030 case lltok::kw_urem: 3031 case lltok::kw_srem: return ParseArithmetic(Inst, PFS, KeywordVal, 1); 3032 case lltok::kw_fdiv: 3033 case lltok::kw_frem: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 3034 case lltok::kw_shl: 3035 case lltok::kw_lshr: 3036 case lltok::kw_ashr: 3037 case lltok::kw_and: 3038 case lltok::kw_or: 3039 case lltok::kw_xor: return ParseLogical(Inst, PFS, KeywordVal); 3040 case lltok::kw_icmp: 3041 case lltok::kw_fcmp: return ParseCompare(Inst, PFS, KeywordVal); 3042 // Casts. 3043 case lltok::kw_trunc: 3044 case lltok::kw_zext: 3045 case lltok::kw_sext: 3046 case lltok::kw_fptrunc: 3047 case lltok::kw_fpext: 3048 case lltok::kw_bitcast: 3049 case lltok::kw_uitofp: 3050 case lltok::kw_sitofp: 3051 case lltok::kw_fptoui: 3052 case lltok::kw_fptosi: 3053 case lltok::kw_inttoptr: 3054 case lltok::kw_ptrtoint: return ParseCast(Inst, PFS, KeywordVal); 3055 // Other. 3056 case lltok::kw_select: return ParseSelect(Inst, PFS); 3057 case lltok::kw_va_arg: return ParseVA_Arg(Inst, PFS); 3058 case lltok::kw_extractelement: return ParseExtractElement(Inst, PFS); 3059 case lltok::kw_insertelement: return ParseInsertElement(Inst, PFS); 3060 case lltok::kw_shufflevector: return ParseShuffleVector(Inst, PFS); 3061 case lltok::kw_phi: return ParsePHI(Inst, PFS); 3062 case lltok::kw_call: return ParseCall(Inst, PFS, false); 3063 case lltok::kw_tail: return ParseCall(Inst, PFS, true); 3064 // Memory. 3065 case lltok::kw_alloca: return ParseAlloc(Inst, PFS); 3066 case lltok::kw_malloc: return ParseAlloc(Inst, PFS, BB, false); 3067 case lltok::kw_free: return ParseFree(Inst, PFS, BB); 3068 case lltok::kw_load: return ParseLoad(Inst, PFS, false); 3069 case lltok::kw_store: return ParseStore(Inst, PFS, false); 3070 case lltok::kw_volatile: 3071 if (EatIfPresent(lltok::kw_load)) 3072 return ParseLoad(Inst, PFS, true); 3073 else if (EatIfPresent(lltok::kw_store)) 3074 return ParseStore(Inst, PFS, true); 3075 else 3076 return TokError("expected 'load' or 'store'"); 3077 case lltok::kw_getresult: return ParseGetResult(Inst, PFS); 3078 case lltok::kw_getelementptr: return ParseGetElementPtr(Inst, PFS); 3079 case lltok::kw_extractvalue: return ParseExtractValue(Inst, PFS); 3080 case lltok::kw_insertvalue: return ParseInsertValue(Inst, PFS); 3081 } 3082} 3083 3084/// ParseCmpPredicate - Parse an integer or fp predicate, based on Kind. 3085bool LLParser::ParseCmpPredicate(unsigned &P, unsigned Opc) { 3086 if (Opc == Instruction::FCmp) { 3087 switch (Lex.getKind()) { 3088 default: TokError("expected fcmp predicate (e.g. 'oeq')"); 3089 case lltok::kw_oeq: P = CmpInst::FCMP_OEQ; break; 3090 case lltok::kw_one: P = CmpInst::FCMP_ONE; break; 3091 case lltok::kw_olt: P = CmpInst::FCMP_OLT; break; 3092 case lltok::kw_ogt: P = CmpInst::FCMP_OGT; break; 3093 case lltok::kw_ole: P = CmpInst::FCMP_OLE; break; 3094 case lltok::kw_oge: P = CmpInst::FCMP_OGE; break; 3095 case lltok::kw_ord: P = CmpInst::FCMP_ORD; break; 3096 case lltok::kw_uno: P = CmpInst::FCMP_UNO; break; 3097 case lltok::kw_ueq: P = CmpInst::FCMP_UEQ; break; 3098 case lltok::kw_une: P = CmpInst::FCMP_UNE; break; 3099 case lltok::kw_ult: P = CmpInst::FCMP_ULT; break; 3100 case lltok::kw_ugt: P = CmpInst::FCMP_UGT; break; 3101 case lltok::kw_ule: P = CmpInst::FCMP_ULE; break; 3102 case lltok::kw_uge: P = CmpInst::FCMP_UGE; break; 3103 case lltok::kw_true: P = CmpInst::FCMP_TRUE; break; 3104 case lltok::kw_false: P = CmpInst::FCMP_FALSE; break; 3105 } 3106 } else { 3107 switch (Lex.getKind()) { 3108 default: TokError("expected icmp predicate (e.g. 'eq')"); 3109 case lltok::kw_eq: P = CmpInst::ICMP_EQ; break; 3110 case lltok::kw_ne: P = CmpInst::ICMP_NE; break; 3111 case lltok::kw_slt: P = CmpInst::ICMP_SLT; break; 3112 case lltok::kw_sgt: P = CmpInst::ICMP_SGT; break; 3113 case lltok::kw_sle: P = CmpInst::ICMP_SLE; break; 3114 case lltok::kw_sge: P = CmpInst::ICMP_SGE; break; 3115 case lltok::kw_ult: P = CmpInst::ICMP_ULT; break; 3116 case lltok::kw_ugt: P = CmpInst::ICMP_UGT; break; 3117 case lltok::kw_ule: P = CmpInst::ICMP_ULE; break; 3118 case lltok::kw_uge: P = CmpInst::ICMP_UGE; break; 3119 } 3120 } 3121 Lex.Lex(); 3122 return false; 3123} 3124 3125//===----------------------------------------------------------------------===// 3126// Terminator Instructions. 3127//===----------------------------------------------------------------------===// 3128 3129/// ParseRet - Parse a return instruction. 3130/// ::= 'ret' void (',' !dbg, !1)* 3131/// ::= 'ret' TypeAndValue (',' !dbg, !1)* 3132/// ::= 'ret' TypeAndValue (',' TypeAndValue)+ (',' !dbg, !1)* 3133/// [[obsolete: LLVM 3.0]] 3134int LLParser::ParseRet(Instruction *&Inst, BasicBlock *BB, 3135 PerFunctionState &PFS) { 3136 PATypeHolder Ty(Type::getVoidTy(Context)); 3137 if (ParseType(Ty, true /*void allowed*/)) return true; 3138 3139 if (Ty->isVoidTy()) { 3140 Inst = ReturnInst::Create(Context); 3141 return false; 3142 } 3143 3144 Value *RV; 3145 if (ParseValue(Ty, RV, PFS)) return true; 3146 3147 bool ExtraComma = false; 3148 if (EatIfPresent(lltok::comma)) { 3149 // Parse optional custom metadata, e.g. !dbg 3150 if (Lex.getKind() == lltok::MetadataVar) { 3151 ExtraComma = true; 3152 } else { 3153 // The normal case is one return value. 3154 // FIXME: LLVM 3.0 remove MRV support for 'ret i32 1, i32 2', requiring 3155 // use of 'ret {i32,i32} {i32 1, i32 2}' 3156 SmallVector<Value*, 8> RVs; 3157 RVs.push_back(RV); 3158 3159 do { 3160 // If optional custom metadata, e.g. !dbg is seen then this is the 3161 // end of MRV. 3162 if (Lex.getKind() == lltok::MetadataVar) 3163 break; 3164 if (ParseTypeAndValue(RV, PFS)) return true; 3165 RVs.push_back(RV); 3166 } while (EatIfPresent(lltok::comma)); 3167 3168 RV = UndefValue::get(PFS.getFunction().getReturnType()); 3169 for (unsigned i = 0, e = RVs.size(); i != e; ++i) { 3170 Instruction *I = InsertValueInst::Create(RV, RVs[i], i, "mrv"); 3171 BB->getInstList().push_back(I); 3172 RV = I; 3173 } 3174 } 3175 } 3176 3177 Inst = ReturnInst::Create(Context, RV); 3178 return ExtraComma ? InstExtraComma : InstNormal; 3179} 3180 3181 3182/// ParseBr 3183/// ::= 'br' TypeAndValue 3184/// ::= 'br' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3185bool LLParser::ParseBr(Instruction *&Inst, PerFunctionState &PFS) { 3186 LocTy Loc, Loc2; 3187 Value *Op0; 3188 BasicBlock *Op1, *Op2; 3189 if (ParseTypeAndValue(Op0, Loc, PFS)) return true; 3190 3191 if (BasicBlock *BB = dyn_cast<BasicBlock>(Op0)) { 3192 Inst = BranchInst::Create(BB); 3193 return false; 3194 } 3195 3196 if (Op0->getType() != Type::getInt1Ty(Context)) 3197 return Error(Loc, "branch condition must have 'i1' type"); 3198 3199 if (ParseToken(lltok::comma, "expected ',' after branch condition") || 3200 ParseTypeAndBasicBlock(Op1, Loc, PFS) || 3201 ParseToken(lltok::comma, "expected ',' after true destination") || 3202 ParseTypeAndBasicBlock(Op2, Loc2, PFS)) 3203 return true; 3204 3205 Inst = BranchInst::Create(Op1, Op2, Op0); 3206 return false; 3207} 3208 3209/// ParseSwitch 3210/// Instruction 3211/// ::= 'switch' TypeAndValue ',' TypeAndValue '[' JumpTable ']' 3212/// JumpTable 3213/// ::= (TypeAndValue ',' TypeAndValue)* 3214bool LLParser::ParseSwitch(Instruction *&Inst, PerFunctionState &PFS) { 3215 LocTy CondLoc, BBLoc; 3216 Value *Cond; 3217 BasicBlock *DefaultBB; 3218 if (ParseTypeAndValue(Cond, CondLoc, PFS) || 3219 ParseToken(lltok::comma, "expected ',' after switch condition") || 3220 ParseTypeAndBasicBlock(DefaultBB, BBLoc, PFS) || 3221 ParseToken(lltok::lsquare, "expected '[' with switch table")) 3222 return true; 3223 3224 if (!Cond->getType()->isIntegerTy()) 3225 return Error(CondLoc, "switch condition must have integer type"); 3226 3227 // Parse the jump table pairs. 3228 SmallPtrSet<Value*, 32> SeenCases; 3229 SmallVector<std::pair<ConstantInt*, BasicBlock*>, 32> Table; 3230 while (Lex.getKind() != lltok::rsquare) { 3231 Value *Constant; 3232 BasicBlock *DestBB; 3233 3234 if (ParseTypeAndValue(Constant, CondLoc, PFS) || 3235 ParseToken(lltok::comma, "expected ',' after case value") || 3236 ParseTypeAndBasicBlock(DestBB, PFS)) 3237 return true; 3238 3239 if (!SeenCases.insert(Constant)) 3240 return Error(CondLoc, "duplicate case value in switch"); 3241 if (!isa<ConstantInt>(Constant)) 3242 return Error(CondLoc, "case value is not a constant integer"); 3243 3244 Table.push_back(std::make_pair(cast<ConstantInt>(Constant), DestBB)); 3245 } 3246 3247 Lex.Lex(); // Eat the ']'. 3248 3249 SwitchInst *SI = SwitchInst::Create(Cond, DefaultBB, Table.size()); 3250 for (unsigned i = 0, e = Table.size(); i != e; ++i) 3251 SI->addCase(Table[i].first, Table[i].second); 3252 Inst = SI; 3253 return false; 3254} 3255 3256/// ParseIndirectBr 3257/// Instruction 3258/// ::= 'indirectbr' TypeAndValue ',' '[' LabelList ']' 3259bool LLParser::ParseIndirectBr(Instruction *&Inst, PerFunctionState &PFS) { 3260 LocTy AddrLoc; 3261 Value *Address; 3262 if (ParseTypeAndValue(Address, AddrLoc, PFS) || 3263 ParseToken(lltok::comma, "expected ',' after indirectbr address") || 3264 ParseToken(lltok::lsquare, "expected '[' with indirectbr")) 3265 return true; 3266 3267 if (!Address->getType()->isPointerTy()) 3268 return Error(AddrLoc, "indirectbr address must have pointer type"); 3269 3270 // Parse the destination list. 3271 SmallVector<BasicBlock*, 16> DestList; 3272 3273 if (Lex.getKind() != lltok::rsquare) { 3274 BasicBlock *DestBB; 3275 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3276 return true; 3277 DestList.push_back(DestBB); 3278 3279 while (EatIfPresent(lltok::comma)) { 3280 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3281 return true; 3282 DestList.push_back(DestBB); 3283 } 3284 } 3285 3286 if (ParseToken(lltok::rsquare, "expected ']' at end of block list")) 3287 return true; 3288 3289 IndirectBrInst *IBI = IndirectBrInst::Create(Address, DestList.size()); 3290 for (unsigned i = 0, e = DestList.size(); i != e; ++i) 3291 IBI->addDestination(DestList[i]); 3292 Inst = IBI; 3293 return false; 3294} 3295 3296 3297/// ParseInvoke 3298/// ::= 'invoke' OptionalCallingConv OptionalAttrs Type Value ParamList 3299/// OptionalAttrs 'to' TypeAndValue 'unwind' TypeAndValue 3300bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) { 3301 LocTy CallLoc = Lex.getLoc(); 3302 unsigned RetAttrs, FnAttrs; 3303 CallingConv::ID CC; 3304 PATypeHolder RetType(Type::getVoidTy(Context)); 3305 LocTy RetTypeLoc; 3306 ValID CalleeID; 3307 SmallVector<ParamInfo, 16> ArgList; 3308 3309 BasicBlock *NormalBB, *UnwindBB; 3310 if (ParseOptionalCallingConv(CC) || 3311 ParseOptionalAttrs(RetAttrs, 1) || 3312 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3313 ParseValID(CalleeID) || 3314 ParseParameterList(ArgList, PFS) || 3315 ParseOptionalAttrs(FnAttrs, 2) || 3316 ParseToken(lltok::kw_to, "expected 'to' in invoke") || 3317 ParseTypeAndBasicBlock(NormalBB, PFS) || 3318 ParseToken(lltok::kw_unwind, "expected 'unwind' in invoke") || 3319 ParseTypeAndBasicBlock(UnwindBB, PFS)) 3320 return true; 3321 3322 // If RetType is a non-function pointer type, then this is the short syntax 3323 // for the call, which means that RetType is just the return type. Infer the 3324 // rest of the function argument types from the arguments that are present. 3325 const PointerType *PFTy = 0; 3326 const FunctionType *Ty = 0; 3327 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3328 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3329 // Pull out the types of all of the arguments... 3330 std::vector<const Type*> ParamTypes; 3331 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3332 ParamTypes.push_back(ArgList[i].V->getType()); 3333 3334 if (!FunctionType::isValidReturnType(RetType)) 3335 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3336 3337 Ty = FunctionType::get(RetType, ParamTypes, false); 3338 PFTy = PointerType::getUnqual(Ty); 3339 } 3340 3341 // Look up the callee. 3342 Value *Callee; 3343 if (ConvertValIDToValue(PFTy, CalleeID, Callee, &PFS)) return true; 3344 3345 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 3346 // function attributes. 3347 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 3348 if (FnAttrs & ObsoleteFuncAttrs) { 3349 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 3350 FnAttrs &= ~ObsoleteFuncAttrs; 3351 } 3352 3353 // Set up the Attributes for the function. 3354 SmallVector<AttributeWithIndex, 8> Attrs; 3355 if (RetAttrs != Attribute::None) 3356 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3357 3358 SmallVector<Value*, 8> Args; 3359 3360 // Loop through FunctionType's arguments and ensure they are specified 3361 // correctly. Also, gather any parameter attributes. 3362 FunctionType::param_iterator I = Ty->param_begin(); 3363 FunctionType::param_iterator E = Ty->param_end(); 3364 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3365 const Type *ExpectedTy = 0; 3366 if (I != E) { 3367 ExpectedTy = *I++; 3368 } else if (!Ty->isVarArg()) { 3369 return Error(ArgList[i].Loc, "too many arguments specified"); 3370 } 3371 3372 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3373 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3374 ExpectedTy->getDescription() + "'"); 3375 Args.push_back(ArgList[i].V); 3376 if (ArgList[i].Attrs != Attribute::None) 3377 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3378 } 3379 3380 if (I != E) 3381 return Error(CallLoc, "not enough parameters specified for call"); 3382 3383 if (FnAttrs != Attribute::None) 3384 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3385 3386 // Finish off the Attributes and check them 3387 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3388 3389 InvokeInst *II = InvokeInst::Create(Callee, NormalBB, UnwindBB, 3390 Args.begin(), Args.end()); 3391 II->setCallingConv(CC); 3392 II->setAttributes(PAL); 3393 Inst = II; 3394 return false; 3395} 3396 3397 3398 3399//===----------------------------------------------------------------------===// 3400// Binary Operators. 3401//===----------------------------------------------------------------------===// 3402 3403/// ParseArithmetic 3404/// ::= ArithmeticOps TypeAndValue ',' Value 3405/// 3406/// If OperandType is 0, then any FP or integer operand is allowed. If it is 1, 3407/// then any integer operand is allowed, if it is 2, any fp operand is allowed. 3408bool LLParser::ParseArithmetic(Instruction *&Inst, PerFunctionState &PFS, 3409 unsigned Opc, unsigned OperandType) { 3410 LocTy Loc; Value *LHS, *RHS; 3411 if (ParseTypeAndValue(LHS, Loc, PFS) || 3412 ParseToken(lltok::comma, "expected ',' in arithmetic operation") || 3413 ParseValue(LHS->getType(), RHS, PFS)) 3414 return true; 3415 3416 bool Valid; 3417 switch (OperandType) { 3418 default: llvm_unreachable("Unknown operand type!"); 3419 case 0: // int or FP. 3420 Valid = LHS->getType()->isIntOrIntVectorTy() || 3421 LHS->getType()->isFPOrFPVectorTy(); 3422 break; 3423 case 1: Valid = LHS->getType()->isIntOrIntVectorTy(); break; 3424 case 2: Valid = LHS->getType()->isFPOrFPVectorTy(); break; 3425 } 3426 3427 if (!Valid) 3428 return Error(Loc, "invalid operand type for instruction"); 3429 3430 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3431 return false; 3432} 3433 3434/// ParseLogical 3435/// ::= ArithmeticOps TypeAndValue ',' Value { 3436bool LLParser::ParseLogical(Instruction *&Inst, PerFunctionState &PFS, 3437 unsigned Opc) { 3438 LocTy Loc; Value *LHS, *RHS; 3439 if (ParseTypeAndValue(LHS, Loc, PFS) || 3440 ParseToken(lltok::comma, "expected ',' in logical operation") || 3441 ParseValue(LHS->getType(), RHS, PFS)) 3442 return true; 3443 3444 if (!LHS->getType()->isIntOrIntVectorTy()) 3445 return Error(Loc,"instruction requires integer or integer vector operands"); 3446 3447 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3448 return false; 3449} 3450 3451 3452/// ParseCompare 3453/// ::= 'icmp' IPredicates TypeAndValue ',' Value 3454/// ::= 'fcmp' FPredicates TypeAndValue ',' Value 3455bool LLParser::ParseCompare(Instruction *&Inst, PerFunctionState &PFS, 3456 unsigned Opc) { 3457 // Parse the integer/fp comparison predicate. 3458 LocTy Loc; 3459 unsigned Pred; 3460 Value *LHS, *RHS; 3461 if (ParseCmpPredicate(Pred, Opc) || 3462 ParseTypeAndValue(LHS, Loc, PFS) || 3463 ParseToken(lltok::comma, "expected ',' after compare value") || 3464 ParseValue(LHS->getType(), RHS, PFS)) 3465 return true; 3466 3467 if (Opc == Instruction::FCmp) { 3468 if (!LHS->getType()->isFPOrFPVectorTy()) 3469 return Error(Loc, "fcmp requires floating point operands"); 3470 Inst = new FCmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3471 } else { 3472 assert(Opc == Instruction::ICmp && "Unknown opcode for CmpInst!"); 3473 if (!LHS->getType()->isIntOrIntVectorTy() && 3474 !LHS->getType()->isPointerTy()) 3475 return Error(Loc, "icmp requires integer operands"); 3476 Inst = new ICmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3477 } 3478 return false; 3479} 3480 3481//===----------------------------------------------------------------------===// 3482// Other Instructions. 3483//===----------------------------------------------------------------------===// 3484 3485 3486/// ParseCast 3487/// ::= CastOpc TypeAndValue 'to' Type 3488bool LLParser::ParseCast(Instruction *&Inst, PerFunctionState &PFS, 3489 unsigned Opc) { 3490 LocTy Loc; Value *Op; 3491 PATypeHolder DestTy(Type::getVoidTy(Context)); 3492 if (ParseTypeAndValue(Op, Loc, PFS) || 3493 ParseToken(lltok::kw_to, "expected 'to' after cast value") || 3494 ParseType(DestTy)) 3495 return true; 3496 3497 if (!CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy)) { 3498 CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy); 3499 return Error(Loc, "invalid cast opcode for cast from '" + 3500 Op->getType()->getDescription() + "' to '" + 3501 DestTy->getDescription() + "'"); 3502 } 3503 Inst = CastInst::Create((Instruction::CastOps)Opc, Op, DestTy); 3504 return false; 3505} 3506 3507/// ParseSelect 3508/// ::= 'select' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3509bool LLParser::ParseSelect(Instruction *&Inst, PerFunctionState &PFS) { 3510 LocTy Loc; 3511 Value *Op0, *Op1, *Op2; 3512 if (ParseTypeAndValue(Op0, Loc, PFS) || 3513 ParseToken(lltok::comma, "expected ',' after select condition") || 3514 ParseTypeAndValue(Op1, PFS) || 3515 ParseToken(lltok::comma, "expected ',' after select value") || 3516 ParseTypeAndValue(Op2, PFS)) 3517 return true; 3518 3519 if (const char *Reason = SelectInst::areInvalidOperands(Op0, Op1, Op2)) 3520 return Error(Loc, Reason); 3521 3522 Inst = SelectInst::Create(Op0, Op1, Op2); 3523 return false; 3524} 3525 3526/// ParseVA_Arg 3527/// ::= 'va_arg' TypeAndValue ',' Type 3528bool LLParser::ParseVA_Arg(Instruction *&Inst, PerFunctionState &PFS) { 3529 Value *Op; 3530 PATypeHolder EltTy(Type::getVoidTy(Context)); 3531 LocTy TypeLoc; 3532 if (ParseTypeAndValue(Op, PFS) || 3533 ParseToken(lltok::comma, "expected ',' after vaarg operand") || 3534 ParseType(EltTy, TypeLoc)) 3535 return true; 3536 3537 if (!EltTy->isFirstClassType()) 3538 return Error(TypeLoc, "va_arg requires operand with first class type"); 3539 3540 Inst = new VAArgInst(Op, EltTy); 3541 return false; 3542} 3543 3544/// ParseExtractElement 3545/// ::= 'extractelement' TypeAndValue ',' TypeAndValue 3546bool LLParser::ParseExtractElement(Instruction *&Inst, PerFunctionState &PFS) { 3547 LocTy Loc; 3548 Value *Op0, *Op1; 3549 if (ParseTypeAndValue(Op0, Loc, PFS) || 3550 ParseToken(lltok::comma, "expected ',' after extract value") || 3551 ParseTypeAndValue(Op1, PFS)) 3552 return true; 3553 3554 if (!ExtractElementInst::isValidOperands(Op0, Op1)) 3555 return Error(Loc, "invalid extractelement operands"); 3556 3557 Inst = ExtractElementInst::Create(Op0, Op1); 3558 return false; 3559} 3560 3561/// ParseInsertElement 3562/// ::= 'insertelement' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3563bool LLParser::ParseInsertElement(Instruction *&Inst, PerFunctionState &PFS) { 3564 LocTy Loc; 3565 Value *Op0, *Op1, *Op2; 3566 if (ParseTypeAndValue(Op0, Loc, PFS) || 3567 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3568 ParseTypeAndValue(Op1, PFS) || 3569 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3570 ParseTypeAndValue(Op2, PFS)) 3571 return true; 3572 3573 if (!InsertElementInst::isValidOperands(Op0, Op1, Op2)) 3574 return Error(Loc, "invalid insertelement operands"); 3575 3576 Inst = InsertElementInst::Create(Op0, Op1, Op2); 3577 return false; 3578} 3579 3580/// ParseShuffleVector 3581/// ::= 'shufflevector' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3582bool LLParser::ParseShuffleVector(Instruction *&Inst, PerFunctionState &PFS) { 3583 LocTy Loc; 3584 Value *Op0, *Op1, *Op2; 3585 if (ParseTypeAndValue(Op0, Loc, PFS) || 3586 ParseToken(lltok::comma, "expected ',' after shuffle mask") || 3587 ParseTypeAndValue(Op1, PFS) || 3588 ParseToken(lltok::comma, "expected ',' after shuffle value") || 3589 ParseTypeAndValue(Op2, PFS)) 3590 return true; 3591 3592 if (!ShuffleVectorInst::isValidOperands(Op0, Op1, Op2)) 3593 return Error(Loc, "invalid extractelement operands"); 3594 3595 Inst = new ShuffleVectorInst(Op0, Op1, Op2); 3596 return false; 3597} 3598 3599/// ParsePHI 3600/// ::= 'phi' Type '[' Value ',' Value ']' (',' '[' Value ',' Value ']')* 3601int LLParser::ParsePHI(Instruction *&Inst, PerFunctionState &PFS) { 3602 PATypeHolder Ty(Type::getVoidTy(Context)); 3603 Value *Op0, *Op1; 3604 LocTy TypeLoc = Lex.getLoc(); 3605 3606 if (ParseType(Ty) || 3607 ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3608 ParseValue(Ty, Op0, PFS) || 3609 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3610 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3611 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3612 return true; 3613 3614 bool AteExtraComma = false; 3615 SmallVector<std::pair<Value*, BasicBlock*>, 16> PHIVals; 3616 while (1) { 3617 PHIVals.push_back(std::make_pair(Op0, cast<BasicBlock>(Op1))); 3618 3619 if (!EatIfPresent(lltok::comma)) 3620 break; 3621 3622 if (Lex.getKind() == lltok::MetadataVar) { 3623 AteExtraComma = true; 3624 break; 3625 } 3626 3627 if (ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3628 ParseValue(Ty, Op0, PFS) || 3629 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3630 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3631 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3632 return true; 3633 } 3634 3635 if (!Ty->isFirstClassType()) 3636 return Error(TypeLoc, "phi node must have first class type"); 3637 3638 PHINode *PN = PHINode::Create(Ty); 3639 PN->reserveOperandSpace(PHIVals.size()); 3640 for (unsigned i = 0, e = PHIVals.size(); i != e; ++i) 3641 PN->addIncoming(PHIVals[i].first, PHIVals[i].second); 3642 Inst = PN; 3643 return AteExtraComma ? InstExtraComma : InstNormal; 3644} 3645 3646/// ParseCall 3647/// ::= 'tail'? 'call' OptionalCallingConv OptionalAttrs Type Value 3648/// ParameterList OptionalAttrs 3649bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS, 3650 bool isTail) { 3651 unsigned RetAttrs, FnAttrs; 3652 CallingConv::ID CC; 3653 PATypeHolder RetType(Type::getVoidTy(Context)); 3654 LocTy RetTypeLoc; 3655 ValID CalleeID; 3656 SmallVector<ParamInfo, 16> ArgList; 3657 LocTy CallLoc = Lex.getLoc(); 3658 3659 if ((isTail && ParseToken(lltok::kw_call, "expected 'tail call'")) || 3660 ParseOptionalCallingConv(CC) || 3661 ParseOptionalAttrs(RetAttrs, 1) || 3662 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3663 ParseValID(CalleeID) || 3664 ParseParameterList(ArgList, PFS) || 3665 ParseOptionalAttrs(FnAttrs, 2)) 3666 return true; 3667 3668 // If RetType is a non-function pointer type, then this is the short syntax 3669 // for the call, which means that RetType is just the return type. Infer the 3670 // rest of the function argument types from the arguments that are present. 3671 const PointerType *PFTy = 0; 3672 const FunctionType *Ty = 0; 3673 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3674 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3675 // Pull out the types of all of the arguments... 3676 std::vector<const Type*> ParamTypes; 3677 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3678 ParamTypes.push_back(ArgList[i].V->getType()); 3679 3680 if (!FunctionType::isValidReturnType(RetType)) 3681 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3682 3683 Ty = FunctionType::get(RetType, ParamTypes, false); 3684 PFTy = PointerType::getUnqual(Ty); 3685 } 3686 3687 // Look up the callee. 3688 Value *Callee; 3689 if (ConvertValIDToValue(PFTy, CalleeID, Callee, &PFS)) return true; 3690 3691 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 3692 // function attributes. 3693 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 3694 if (FnAttrs & ObsoleteFuncAttrs) { 3695 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 3696 FnAttrs &= ~ObsoleteFuncAttrs; 3697 } 3698 3699 // Set up the Attributes for the function. 3700 SmallVector<AttributeWithIndex, 8> Attrs; 3701 if (RetAttrs != Attribute::None) 3702 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3703 3704 SmallVector<Value*, 8> Args; 3705 3706 // Loop through FunctionType's arguments and ensure they are specified 3707 // correctly. Also, gather any parameter attributes. 3708 FunctionType::param_iterator I = Ty->param_begin(); 3709 FunctionType::param_iterator E = Ty->param_end(); 3710 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3711 const Type *ExpectedTy = 0; 3712 if (I != E) { 3713 ExpectedTy = *I++; 3714 } else if (!Ty->isVarArg()) { 3715 return Error(ArgList[i].Loc, "too many arguments specified"); 3716 } 3717 3718 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3719 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3720 ExpectedTy->getDescription() + "'"); 3721 Args.push_back(ArgList[i].V); 3722 if (ArgList[i].Attrs != Attribute::None) 3723 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3724 } 3725 3726 if (I != E) 3727 return Error(CallLoc, "not enough parameters specified for call"); 3728 3729 if (FnAttrs != Attribute::None) 3730 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3731 3732 // Finish off the Attributes and check them 3733 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3734 3735 CallInst *CI = CallInst::Create(Callee, Args.begin(), Args.end()); 3736 CI->setTailCall(isTail); 3737 CI->setCallingConv(CC); 3738 CI->setAttributes(PAL); 3739 Inst = CI; 3740 return false; 3741} 3742 3743//===----------------------------------------------------------------------===// 3744// Memory Instructions. 3745//===----------------------------------------------------------------------===// 3746 3747/// ParseAlloc 3748/// ::= 'malloc' Type (',' TypeAndValue)? (',' OptionalInfo)? 3749/// ::= 'alloca' Type (',' TypeAndValue)? (',' OptionalInfo)? 3750int LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS, 3751 BasicBlock* BB, bool isAlloca) { 3752 PATypeHolder Ty(Type::getVoidTy(Context)); 3753 Value *Size = 0; 3754 LocTy SizeLoc; 3755 unsigned Alignment = 0; 3756 if (ParseType(Ty)) return true; 3757 3758 bool AteExtraComma = false; 3759 if (EatIfPresent(lltok::comma)) { 3760 if (Lex.getKind() == lltok::kw_align) { 3761 if (ParseOptionalAlignment(Alignment)) return true; 3762 } else if (Lex.getKind() == lltok::MetadataVar) { 3763 AteExtraComma = true; 3764 } else { 3765 if (ParseTypeAndValue(Size, SizeLoc, PFS) || 3766 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3767 return true; 3768 } 3769 } 3770 3771 if (Size && !Size->getType()->isIntegerTy(32)) 3772 return Error(SizeLoc, "element count must be i32"); 3773 3774 if (isAlloca) { 3775 Inst = new AllocaInst(Ty, Size, Alignment); 3776 return AteExtraComma ? InstExtraComma : InstNormal; 3777 } 3778 3779 // Autoupgrade old malloc instruction to malloc call. 3780 // FIXME: Remove in LLVM 3.0. 3781 const Type *IntPtrTy = Type::getInt32Ty(Context); 3782 Constant *AllocSize = ConstantExpr::getSizeOf(Ty); 3783 AllocSize = ConstantExpr::getTruncOrBitCast(AllocSize, IntPtrTy); 3784 if (!MallocF) 3785 // Prototype malloc as "void *(int32)". 3786 // This function is renamed as "malloc" in ValidateEndOfModule(). 3787 MallocF = cast<Function>( 3788 M->getOrInsertFunction("", Type::getInt8PtrTy(Context), IntPtrTy, NULL)); 3789 Inst = CallInst::CreateMalloc(BB, IntPtrTy, Ty, AllocSize, Size, MallocF); 3790return AteExtraComma ? InstExtraComma : InstNormal; 3791} 3792 3793/// ParseFree 3794/// ::= 'free' TypeAndValue 3795bool LLParser::ParseFree(Instruction *&Inst, PerFunctionState &PFS, 3796 BasicBlock* BB) { 3797 Value *Val; LocTy Loc; 3798 if (ParseTypeAndValue(Val, Loc, PFS)) return true; 3799 if (!Val->getType()->isPointerTy()) 3800 return Error(Loc, "operand to free must be a pointer"); 3801 Inst = CallInst::CreateFree(Val, BB); 3802 return false; 3803} 3804 3805/// ParseLoad 3806/// ::= 'volatile'? 'load' TypeAndValue (',' OptionalInfo)? 3807int LLParser::ParseLoad(Instruction *&Inst, PerFunctionState &PFS, 3808 bool isVolatile) { 3809 Value *Val; LocTy Loc; 3810 unsigned Alignment = 0; 3811 bool AteExtraComma = false; 3812 if (ParseTypeAndValue(Val, Loc, PFS) || 3813 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3814 return true; 3815 3816 if (!Val->getType()->isPointerTy() || 3817 !cast<PointerType>(Val->getType())->getElementType()->isFirstClassType()) 3818 return Error(Loc, "load operand must be a pointer to a first class type"); 3819 3820 Inst = new LoadInst(Val, "", isVolatile, Alignment); 3821 return AteExtraComma ? InstExtraComma : InstNormal; 3822} 3823 3824/// ParseStore 3825/// ::= 'volatile'? 'store' TypeAndValue ',' TypeAndValue (',' 'align' i32)? 3826int LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS, 3827 bool isVolatile) { 3828 Value *Val, *Ptr; LocTy Loc, PtrLoc; 3829 unsigned Alignment = 0; 3830 bool AteExtraComma = false; 3831 if (ParseTypeAndValue(Val, Loc, PFS) || 3832 ParseToken(lltok::comma, "expected ',' after store operand") || 3833 ParseTypeAndValue(Ptr, PtrLoc, PFS) || 3834 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3835 return true; 3836 3837 if (!Ptr->getType()->isPointerTy()) 3838 return Error(PtrLoc, "store operand must be a pointer"); 3839 if (!Val->getType()->isFirstClassType()) 3840 return Error(Loc, "store operand must be a first class value"); 3841 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType()) 3842 return Error(Loc, "stored value and pointer type do not match"); 3843 3844 Inst = new StoreInst(Val, Ptr, isVolatile, Alignment); 3845 return AteExtraComma ? InstExtraComma : InstNormal; 3846} 3847 3848/// ParseGetResult 3849/// ::= 'getresult' TypeAndValue ',' i32 3850/// FIXME: Remove support for getresult in LLVM 3.0 3851bool LLParser::ParseGetResult(Instruction *&Inst, PerFunctionState &PFS) { 3852 Value *Val; LocTy ValLoc, EltLoc; 3853 unsigned Element; 3854 if (ParseTypeAndValue(Val, ValLoc, PFS) || 3855 ParseToken(lltok::comma, "expected ',' after getresult operand") || 3856 ParseUInt32(Element, EltLoc)) 3857 return true; 3858 3859 if (!Val->getType()->isStructTy() && !Val->getType()->isArrayTy()) 3860 return Error(ValLoc, "getresult inst requires an aggregate operand"); 3861 if (!ExtractValueInst::getIndexedType(Val->getType(), Element)) 3862 return Error(EltLoc, "invalid getresult index for value"); 3863 Inst = ExtractValueInst::Create(Val, Element); 3864 return false; 3865} 3866 3867/// ParseGetElementPtr 3868/// ::= 'getelementptr' 'inbounds'? TypeAndValue (',' TypeAndValue)* 3869int LLParser::ParseGetElementPtr(Instruction *&Inst, PerFunctionState &PFS) { 3870 Value *Ptr, *Val; LocTy Loc, EltLoc; 3871 3872 bool InBounds = EatIfPresent(lltok::kw_inbounds); 3873 3874 if (ParseTypeAndValue(Ptr, Loc, PFS)) return true; 3875 3876 if (!Ptr->getType()->isPointerTy()) 3877 return Error(Loc, "base of getelementptr must be a pointer"); 3878 3879 SmallVector<Value*, 16> Indices; 3880 bool AteExtraComma = false; 3881 while (EatIfPresent(lltok::comma)) { 3882 if (Lex.getKind() == lltok::MetadataVar) { 3883 AteExtraComma = true; 3884 break; 3885 } 3886 if (ParseTypeAndValue(Val, EltLoc, PFS)) return true; 3887 if (!Val->getType()->isIntegerTy()) 3888 return Error(EltLoc, "getelementptr index must be an integer"); 3889 Indices.push_back(Val); 3890 } 3891 3892 if (!GetElementPtrInst::getIndexedType(Ptr->getType(), 3893 Indices.begin(), Indices.end())) 3894 return Error(Loc, "invalid getelementptr indices"); 3895 Inst = GetElementPtrInst::Create(Ptr, Indices.begin(), Indices.end()); 3896 if (InBounds) 3897 cast<GetElementPtrInst>(Inst)->setIsInBounds(true); 3898 return AteExtraComma ? InstExtraComma : InstNormal; 3899} 3900 3901/// ParseExtractValue 3902/// ::= 'extractvalue' TypeAndValue (',' uint32)+ 3903int LLParser::ParseExtractValue(Instruction *&Inst, PerFunctionState &PFS) { 3904 Value *Val; LocTy Loc; 3905 SmallVector<unsigned, 4> Indices; 3906 bool AteExtraComma; 3907 if (ParseTypeAndValue(Val, Loc, PFS) || 3908 ParseIndexList(Indices, AteExtraComma)) 3909 return true; 3910 3911 if (!Val->getType()->isAggregateType()) 3912 return Error(Loc, "extractvalue operand must be aggregate type"); 3913 3914 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 3915 Indices.end())) 3916 return Error(Loc, "invalid indices for extractvalue"); 3917 Inst = ExtractValueInst::Create(Val, Indices.begin(), Indices.end()); 3918 return AteExtraComma ? InstExtraComma : InstNormal; 3919} 3920 3921/// ParseInsertValue 3922/// ::= 'insertvalue' TypeAndValue ',' TypeAndValue (',' uint32)+ 3923int LLParser::ParseInsertValue(Instruction *&Inst, PerFunctionState &PFS) { 3924 Value *Val0, *Val1; LocTy Loc0, Loc1; 3925 SmallVector<unsigned, 4> Indices; 3926 bool AteExtraComma; 3927 if (ParseTypeAndValue(Val0, Loc0, PFS) || 3928 ParseToken(lltok::comma, "expected comma after insertvalue operand") || 3929 ParseTypeAndValue(Val1, Loc1, PFS) || 3930 ParseIndexList(Indices, AteExtraComma)) 3931 return true; 3932 3933 if (!Val0->getType()->isAggregateType()) 3934 return Error(Loc0, "insertvalue operand must be aggregate type"); 3935 3936 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 3937 Indices.end())) 3938 return Error(Loc0, "invalid indices for insertvalue"); 3939 Inst = InsertValueInst::Create(Val0, Val1, Indices.begin(), Indices.end()); 3940 return AteExtraComma ? InstExtraComma : InstNormal; 3941} 3942 3943//===----------------------------------------------------------------------===// 3944// Embedded metadata. 3945//===----------------------------------------------------------------------===// 3946 3947/// ParseMDNodeVector 3948/// ::= Element (',' Element)* 3949/// Element 3950/// ::= 'null' | TypeAndValue 3951bool LLParser::ParseMDNodeVector(SmallVectorImpl<Value*> &Elts, 3952 PerFunctionState *PFS) { 3953 do { 3954 // Null is a special case since it is typeless. 3955 if (EatIfPresent(lltok::kw_null)) { 3956 Elts.push_back(0); 3957 continue; 3958 } 3959 3960 Value *V = 0; 3961 PATypeHolder Ty(Type::getVoidTy(Context)); 3962 ValID ID; 3963 if (ParseType(Ty) || ParseValID(ID, PFS) || 3964 ConvertValIDToValue(Ty, ID, V, PFS)) 3965 return true; 3966 3967 Elts.push_back(V); 3968 } while (EatIfPresent(lltok::comma)); 3969 3970 return false; 3971} 3972