LLParser.cpp revision 212904
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_linker_private_weak: // OptionalLinkage 202 case lltok::kw_linker_private_weak_def_auto: // OptionalLinkage 203 case lltok::kw_internal: // OptionalLinkage 204 case lltok::kw_weak: // OptionalLinkage 205 case lltok::kw_weak_odr: // OptionalLinkage 206 case lltok::kw_linkonce: // OptionalLinkage 207 case lltok::kw_linkonce_odr: // OptionalLinkage 208 case lltok::kw_appending: // OptionalLinkage 209 case lltok::kw_dllexport: // OptionalLinkage 210 case lltok::kw_common: // OptionalLinkage 211 case lltok::kw_dllimport: // OptionalLinkage 212 case lltok::kw_extern_weak: // OptionalLinkage 213 case lltok::kw_external: { // OptionalLinkage 214 unsigned Linkage, Visibility; 215 if (ParseOptionalLinkage(Linkage) || 216 ParseOptionalVisibility(Visibility) || 217 ParseGlobal("", SMLoc(), Linkage, true, Visibility)) 218 return true; 219 break; 220 } 221 case lltok::kw_default: // OptionalVisibility 222 case lltok::kw_hidden: // OptionalVisibility 223 case lltok::kw_protected: { // OptionalVisibility 224 unsigned Visibility; 225 if (ParseOptionalVisibility(Visibility) || 226 ParseGlobal("", SMLoc(), 0, false, Visibility)) 227 return true; 228 break; 229 } 230 231 case lltok::kw_thread_local: // OptionalThreadLocal 232 case lltok::kw_addrspace: // OptionalAddrSpace 233 case lltok::kw_constant: // GlobalType 234 case lltok::kw_global: // GlobalType 235 if (ParseGlobal("", SMLoc(), 0, false, 0)) return true; 236 break; 237 } 238 } 239} 240 241 242/// toplevelentity 243/// ::= 'module' 'asm' STRINGCONSTANT 244bool LLParser::ParseModuleAsm() { 245 assert(Lex.getKind() == lltok::kw_module); 246 Lex.Lex(); 247 248 std::string AsmStr; 249 if (ParseToken(lltok::kw_asm, "expected 'module asm'") || 250 ParseStringConstant(AsmStr)) return true; 251 252 const std::string &AsmSoFar = M->getModuleInlineAsm(); 253 if (AsmSoFar.empty()) 254 M->setModuleInlineAsm(AsmStr); 255 else 256 M->setModuleInlineAsm(AsmSoFar+"\n"+AsmStr); 257 return false; 258} 259 260/// toplevelentity 261/// ::= 'target' 'triple' '=' STRINGCONSTANT 262/// ::= 'target' 'datalayout' '=' STRINGCONSTANT 263bool LLParser::ParseTargetDefinition() { 264 assert(Lex.getKind() == lltok::kw_target); 265 std::string Str; 266 switch (Lex.Lex()) { 267 default: return TokError("unknown target property"); 268 case lltok::kw_triple: 269 Lex.Lex(); 270 if (ParseToken(lltok::equal, "expected '=' after target triple") || 271 ParseStringConstant(Str)) 272 return true; 273 M->setTargetTriple(Str); 274 return false; 275 case lltok::kw_datalayout: 276 Lex.Lex(); 277 if (ParseToken(lltok::equal, "expected '=' after target datalayout") || 278 ParseStringConstant(Str)) 279 return true; 280 M->setDataLayout(Str); 281 return false; 282 } 283} 284 285/// toplevelentity 286/// ::= 'deplibs' '=' '[' ']' 287/// ::= 'deplibs' '=' '[' STRINGCONSTANT (',' STRINGCONSTANT)* ']' 288bool LLParser::ParseDepLibs() { 289 assert(Lex.getKind() == lltok::kw_deplibs); 290 Lex.Lex(); 291 if (ParseToken(lltok::equal, "expected '=' after deplibs") || 292 ParseToken(lltok::lsquare, "expected '=' after deplibs")) 293 return true; 294 295 if (EatIfPresent(lltok::rsquare)) 296 return false; 297 298 std::string Str; 299 if (ParseStringConstant(Str)) return true; 300 M->addLibrary(Str); 301 302 while (EatIfPresent(lltok::comma)) { 303 if (ParseStringConstant(Str)) return true; 304 M->addLibrary(Str); 305 } 306 307 return ParseToken(lltok::rsquare, "expected ']' at end of list"); 308} 309 310/// ParseUnnamedType: 311/// ::= 'type' type 312/// ::= LocalVarID '=' 'type' type 313bool LLParser::ParseUnnamedType() { 314 unsigned TypeID = NumberedTypes.size(); 315 316 // Handle the LocalVarID form. 317 if (Lex.getKind() == lltok::LocalVarID) { 318 if (Lex.getUIntVal() != TypeID) 319 return Error(Lex.getLoc(), "type expected to be numbered '%" + 320 utostr(TypeID) + "'"); 321 Lex.Lex(); // eat LocalVarID; 322 323 if (ParseToken(lltok::equal, "expected '=' after name")) 324 return true; 325 } 326 327 LocTy TypeLoc = Lex.getLoc(); 328 if (ParseToken(lltok::kw_type, "expected 'type' after '='")) return true; 329 330 PATypeHolder Ty(Type::getVoidTy(Context)); 331 if (ParseType(Ty)) return true; 332 333 // See if this type was previously referenced. 334 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 335 FI = ForwardRefTypeIDs.find(TypeID); 336 if (FI != ForwardRefTypeIDs.end()) { 337 if (FI->second.first.get() == Ty) 338 return Error(TypeLoc, "self referential type is invalid"); 339 340 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 341 Ty = FI->second.first.get(); 342 ForwardRefTypeIDs.erase(FI); 343 } 344 345 NumberedTypes.push_back(Ty); 346 347 return false; 348} 349 350/// toplevelentity 351/// ::= LocalVar '=' 'type' type 352bool LLParser::ParseNamedType() { 353 std::string Name = Lex.getStrVal(); 354 LocTy NameLoc = Lex.getLoc(); 355 Lex.Lex(); // eat LocalVar. 356 357 PATypeHolder Ty(Type::getVoidTy(Context)); 358 359 if (ParseToken(lltok::equal, "expected '=' after name") || 360 ParseToken(lltok::kw_type, "expected 'type' after name") || 361 ParseType(Ty)) 362 return true; 363 364 // Set the type name, checking for conflicts as we do so. 365 bool AlreadyExists = M->addTypeName(Name, Ty); 366 if (!AlreadyExists) return false; 367 368 // See if this type is a forward reference. We need to eagerly resolve 369 // types to allow recursive type redefinitions below. 370 std::map<std::string, std::pair<PATypeHolder, LocTy> >::iterator 371 FI = ForwardRefTypes.find(Name); 372 if (FI != ForwardRefTypes.end()) { 373 if (FI->second.first.get() == Ty) 374 return Error(NameLoc, "self referential type is invalid"); 375 376 cast<DerivedType>(FI->second.first.get())->refineAbstractTypeTo(Ty); 377 Ty = FI->second.first.get(); 378 ForwardRefTypes.erase(FI); 379 } 380 381 // Inserting a name that is already defined, get the existing name. 382 const Type *Existing = M->getTypeByName(Name); 383 assert(Existing && "Conflict but no matching type?!"); 384 385 // Otherwise, this is an attempt to redefine a type. That's okay if 386 // the redefinition is identical to the original. 387 // FIXME: REMOVE REDEFINITIONS IN LLVM 3.0 388 if (Existing == Ty) return false; 389 390 // Any other kind of (non-equivalent) redefinition is an error. 391 return Error(NameLoc, "redefinition of type named '" + Name + "' of type '" + 392 Ty->getDescription() + "'"); 393} 394 395 396/// toplevelentity 397/// ::= 'declare' FunctionHeader 398bool LLParser::ParseDeclare() { 399 assert(Lex.getKind() == lltok::kw_declare); 400 Lex.Lex(); 401 402 Function *F; 403 return ParseFunctionHeader(F, false); 404} 405 406/// toplevelentity 407/// ::= 'define' FunctionHeader '{' ... 408bool LLParser::ParseDefine() { 409 assert(Lex.getKind() == lltok::kw_define); 410 Lex.Lex(); 411 412 Function *F; 413 return ParseFunctionHeader(F, true) || 414 ParseFunctionBody(*F); 415} 416 417/// ParseGlobalType 418/// ::= 'constant' 419/// ::= 'global' 420bool LLParser::ParseGlobalType(bool &IsConstant) { 421 if (Lex.getKind() == lltok::kw_constant) 422 IsConstant = true; 423 else if (Lex.getKind() == lltok::kw_global) 424 IsConstant = false; 425 else { 426 IsConstant = false; 427 return TokError("expected 'global' or 'constant'"); 428 } 429 Lex.Lex(); 430 return false; 431} 432 433/// ParseUnnamedGlobal: 434/// OptionalVisibility ALIAS ... 435/// OptionalLinkage OptionalVisibility ... -> global variable 436/// GlobalID '=' OptionalVisibility ALIAS ... 437/// GlobalID '=' OptionalLinkage OptionalVisibility ... -> global variable 438bool LLParser::ParseUnnamedGlobal() { 439 unsigned VarID = NumberedVals.size(); 440 std::string Name; 441 LocTy NameLoc = Lex.getLoc(); 442 443 // Handle the GlobalID form. 444 if (Lex.getKind() == lltok::GlobalID) { 445 if (Lex.getUIntVal() != VarID) 446 return Error(Lex.getLoc(), "variable expected to be numbered '%" + 447 utostr(VarID) + "'"); 448 Lex.Lex(); // eat GlobalID; 449 450 if (ParseToken(lltok::equal, "expected '=' after name")) 451 return true; 452 } 453 454 bool HasLinkage; 455 unsigned Linkage, Visibility; 456 if (ParseOptionalLinkage(Linkage, HasLinkage) || 457 ParseOptionalVisibility(Visibility)) 458 return true; 459 460 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 461 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 462 return ParseAlias(Name, NameLoc, Visibility); 463} 464 465/// ParseNamedGlobal: 466/// GlobalVar '=' OptionalVisibility ALIAS ... 467/// GlobalVar '=' OptionalLinkage OptionalVisibility ... -> global variable 468bool LLParser::ParseNamedGlobal() { 469 assert(Lex.getKind() == lltok::GlobalVar); 470 LocTy NameLoc = Lex.getLoc(); 471 std::string Name = Lex.getStrVal(); 472 Lex.Lex(); 473 474 bool HasLinkage; 475 unsigned Linkage, Visibility; 476 if (ParseToken(lltok::equal, "expected '=' in global variable") || 477 ParseOptionalLinkage(Linkage, HasLinkage) || 478 ParseOptionalVisibility(Visibility)) 479 return true; 480 481 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 482 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 483 return ParseAlias(Name, NameLoc, Visibility); 484} 485 486// MDString: 487// ::= '!' STRINGCONSTANT 488bool LLParser::ParseMDString(MDString *&Result) { 489 std::string Str; 490 if (ParseStringConstant(Str)) return true; 491 Result = MDString::get(Context, Str); 492 return false; 493} 494 495// MDNode: 496// ::= '!' MDNodeNumber 497// 498/// This version of ParseMDNodeID returns the slot number and null in the case 499/// of a forward reference. 500bool LLParser::ParseMDNodeID(MDNode *&Result, unsigned &SlotNo) { 501 // !{ ..., !42, ... } 502 if (ParseUInt32(SlotNo)) return true; 503 504 // Check existing MDNode. 505 if (SlotNo < NumberedMetadata.size() && NumberedMetadata[SlotNo] != 0) 506 Result = NumberedMetadata[SlotNo]; 507 else 508 Result = 0; 509 return false; 510} 511 512bool LLParser::ParseMDNodeID(MDNode *&Result) { 513 // !{ ..., !42, ... } 514 unsigned MID = 0; 515 if (ParseMDNodeID(Result, MID)) return true; 516 517 // If not a forward reference, just return it now. 518 if (Result) return false; 519 520 // Otherwise, create MDNode forward reference. 521 MDNode *FwdNode = MDNode::getTemporary(Context, 0, 0); 522 ForwardRefMDNodes[MID] = std::make_pair(FwdNode, Lex.getLoc()); 523 524 if (NumberedMetadata.size() <= MID) 525 NumberedMetadata.resize(MID+1); 526 NumberedMetadata[MID] = FwdNode; 527 Result = FwdNode; 528 return false; 529} 530 531/// ParseNamedMetadata: 532/// !foo = !{ !1, !2 } 533bool LLParser::ParseNamedMetadata() { 534 assert(Lex.getKind() == lltok::MetadataVar); 535 std::string Name = Lex.getStrVal(); 536 Lex.Lex(); 537 538 if (ParseToken(lltok::equal, "expected '=' here") || 539 ParseToken(lltok::exclaim, "Expected '!' here") || 540 ParseToken(lltok::lbrace, "Expected '{' here")) 541 return true; 542 543 NamedMDNode *NMD = M->getOrInsertNamedMetadata(Name); 544 if (Lex.getKind() != lltok::rbrace) 545 do { 546 if (ParseToken(lltok::exclaim, "Expected '!' here")) 547 return true; 548 549 MDNode *N = 0; 550 if (ParseMDNodeID(N)) return true; 551 NMD->addOperand(N); 552 } while (EatIfPresent(lltok::comma)); 553 554 if (ParseToken(lltok::rbrace, "expected end of metadata node")) 555 return true; 556 557 return false; 558} 559 560/// ParseStandaloneMetadata: 561/// !42 = !{...} 562bool LLParser::ParseStandaloneMetadata() { 563 assert(Lex.getKind() == lltok::exclaim); 564 Lex.Lex(); 565 unsigned MetadataID = 0; 566 567 LocTy TyLoc; 568 PATypeHolder Ty(Type::getVoidTy(Context)); 569 SmallVector<Value *, 16> Elts; 570 if (ParseUInt32(MetadataID) || 571 ParseToken(lltok::equal, "expected '=' here") || 572 ParseType(Ty, TyLoc) || 573 ParseToken(lltok::exclaim, "Expected '!' here") || 574 ParseToken(lltok::lbrace, "Expected '{' here") || 575 ParseMDNodeVector(Elts, NULL) || 576 ParseToken(lltok::rbrace, "expected end of metadata node")) 577 return true; 578 579 MDNode *Init = MDNode::get(Context, Elts.data(), Elts.size()); 580 581 // See if this was forward referenced, if so, handle it. 582 std::map<unsigned, std::pair<TrackingVH<MDNode>, LocTy> >::iterator 583 FI = ForwardRefMDNodes.find(MetadataID); 584 if (FI != ForwardRefMDNodes.end()) { 585 MDNode *Temp = FI->second.first; 586 Temp->replaceAllUsesWith(Init); 587 MDNode::deleteTemporary(Temp); 588 ForwardRefMDNodes.erase(FI); 589 590 assert(NumberedMetadata[MetadataID] == Init && "Tracking VH didn't work"); 591 } else { 592 if (MetadataID >= NumberedMetadata.size()) 593 NumberedMetadata.resize(MetadataID+1); 594 595 if (NumberedMetadata[MetadataID] != 0) 596 return TokError("Metadata id is already used"); 597 NumberedMetadata[MetadataID] = Init; 598 } 599 600 return false; 601} 602 603/// ParseAlias: 604/// ::= GlobalVar '=' OptionalVisibility 'alias' OptionalLinkage Aliasee 605/// Aliasee 606/// ::= TypeAndValue 607/// ::= 'bitcast' '(' TypeAndValue 'to' Type ')' 608/// ::= 'getelementptr' 'inbounds'? '(' ... ')' 609/// 610/// Everything through visibility has already been parsed. 611/// 612bool LLParser::ParseAlias(const std::string &Name, LocTy NameLoc, 613 unsigned Visibility) { 614 assert(Lex.getKind() == lltok::kw_alias); 615 Lex.Lex(); 616 unsigned Linkage; 617 LocTy LinkageLoc = Lex.getLoc(); 618 if (ParseOptionalLinkage(Linkage)) 619 return true; 620 621 if (Linkage != GlobalValue::ExternalLinkage && 622 Linkage != GlobalValue::WeakAnyLinkage && 623 Linkage != GlobalValue::WeakODRLinkage && 624 Linkage != GlobalValue::InternalLinkage && 625 Linkage != GlobalValue::PrivateLinkage && 626 Linkage != GlobalValue::LinkerPrivateLinkage && 627 Linkage != GlobalValue::LinkerPrivateWeakLinkage && 628 Linkage != GlobalValue::LinkerPrivateWeakDefAutoLinkage) 629 return Error(LinkageLoc, "invalid linkage type for alias"); 630 631 Constant *Aliasee; 632 LocTy AliaseeLoc = Lex.getLoc(); 633 if (Lex.getKind() != lltok::kw_bitcast && 634 Lex.getKind() != lltok::kw_getelementptr) { 635 if (ParseGlobalTypeAndValue(Aliasee)) return true; 636 } else { 637 // The bitcast dest type is not present, it is implied by the dest type. 638 ValID ID; 639 if (ParseValID(ID)) return true; 640 if (ID.Kind != ValID::t_Constant) 641 return Error(AliaseeLoc, "invalid aliasee"); 642 Aliasee = ID.ConstantVal; 643 } 644 645 if (!Aliasee->getType()->isPointerTy()) 646 return Error(AliaseeLoc, "alias must have pointer type"); 647 648 // Okay, create the alias but do not insert it into the module yet. 649 GlobalAlias* GA = new GlobalAlias(Aliasee->getType(), 650 (GlobalValue::LinkageTypes)Linkage, Name, 651 Aliasee); 652 GA->setVisibility((GlobalValue::VisibilityTypes)Visibility); 653 654 // See if this value already exists in the symbol table. If so, it is either 655 // a redefinition or a definition of a forward reference. 656 if (GlobalValue *Val = M->getNamedValue(Name)) { 657 // See if this was a redefinition. If so, there is no entry in 658 // ForwardRefVals. 659 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 660 I = ForwardRefVals.find(Name); 661 if (I == ForwardRefVals.end()) 662 return Error(NameLoc, "redefinition of global named '@" + Name + "'"); 663 664 // Otherwise, this was a definition of forward ref. Verify that types 665 // agree. 666 if (Val->getType() != GA->getType()) 667 return Error(NameLoc, 668 "forward reference and definition of alias have different types"); 669 670 // If they agree, just RAUW the old value with the alias and remove the 671 // forward ref info. 672 Val->replaceAllUsesWith(GA); 673 Val->eraseFromParent(); 674 ForwardRefVals.erase(I); 675 } 676 677 // Insert into the module, we know its name won't collide now. 678 M->getAliasList().push_back(GA); 679 assert(GA->getNameStr() == Name && "Should not be a name conflict!"); 680 681 return false; 682} 683 684/// ParseGlobal 685/// ::= GlobalVar '=' OptionalLinkage OptionalVisibility OptionalThreadLocal 686/// OptionalAddrSpace GlobalType Type Const 687/// ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 688/// OptionalAddrSpace GlobalType Type Const 689/// 690/// Everything through visibility has been parsed already. 691/// 692bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc, 693 unsigned Linkage, bool HasLinkage, 694 unsigned Visibility) { 695 unsigned AddrSpace; 696 bool ThreadLocal, IsConstant; 697 LocTy TyLoc; 698 699 PATypeHolder Ty(Type::getVoidTy(Context)); 700 if (ParseOptionalToken(lltok::kw_thread_local, ThreadLocal) || 701 ParseOptionalAddrSpace(AddrSpace) || 702 ParseGlobalType(IsConstant) || 703 ParseType(Ty, TyLoc)) 704 return true; 705 706 // If the linkage is specified and is external, then no initializer is 707 // present. 708 Constant *Init = 0; 709 if (!HasLinkage || (Linkage != GlobalValue::DLLImportLinkage && 710 Linkage != GlobalValue::ExternalWeakLinkage && 711 Linkage != GlobalValue::ExternalLinkage)) { 712 if (ParseGlobalValue(Ty, Init)) 713 return true; 714 } 715 716 if (Ty->isFunctionTy() || Ty->isLabelTy()) 717 return Error(TyLoc, "invalid type for global variable"); 718 719 GlobalVariable *GV = 0; 720 721 // See if the global was forward referenced, if so, use the global. 722 if (!Name.empty()) { 723 if (GlobalValue *GVal = M->getNamedValue(Name)) { 724 if (!ForwardRefVals.erase(Name) || !isa<GlobalValue>(GVal)) 725 return Error(NameLoc, "redefinition of global '@" + Name + "'"); 726 GV = cast<GlobalVariable>(GVal); 727 } 728 } else { 729 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 730 I = ForwardRefValIDs.find(NumberedVals.size()); 731 if (I != ForwardRefValIDs.end()) { 732 GV = cast<GlobalVariable>(I->second.first); 733 ForwardRefValIDs.erase(I); 734 } 735 } 736 737 if (GV == 0) { 738 GV = new GlobalVariable(*M, Ty, false, GlobalValue::ExternalLinkage, 0, 739 Name, 0, false, AddrSpace); 740 } else { 741 if (GV->getType()->getElementType() != Ty) 742 return Error(TyLoc, 743 "forward reference and definition of global have different types"); 744 745 // Move the forward-reference to the correct spot in the module. 746 M->getGlobalList().splice(M->global_end(), M->getGlobalList(), GV); 747 } 748 749 if (Name.empty()) 750 NumberedVals.push_back(GV); 751 752 // Set the parsed properties on the global. 753 if (Init) 754 GV->setInitializer(Init); 755 GV->setConstant(IsConstant); 756 GV->setLinkage((GlobalValue::LinkageTypes)Linkage); 757 GV->setVisibility((GlobalValue::VisibilityTypes)Visibility); 758 GV->setThreadLocal(ThreadLocal); 759 760 // Parse attributes on the global. 761 while (Lex.getKind() == lltok::comma) { 762 Lex.Lex(); 763 764 if (Lex.getKind() == lltok::kw_section) { 765 Lex.Lex(); 766 GV->setSection(Lex.getStrVal()); 767 if (ParseToken(lltok::StringConstant, "expected global section string")) 768 return true; 769 } else if (Lex.getKind() == lltok::kw_align) { 770 unsigned Alignment; 771 if (ParseOptionalAlignment(Alignment)) return true; 772 GV->setAlignment(Alignment); 773 } else { 774 TokError("unknown global variable property!"); 775 } 776 } 777 778 return false; 779} 780 781 782//===----------------------------------------------------------------------===// 783// GlobalValue Reference/Resolution Routines. 784//===----------------------------------------------------------------------===// 785 786/// GetGlobalVal - Get a value with the specified name or ID, creating a 787/// forward reference record if needed. This can return null if the value 788/// exists but does not have the right type. 789GlobalValue *LLParser::GetGlobalVal(const std::string &Name, const Type *Ty, 790 LocTy Loc) { 791 const PointerType *PTy = dyn_cast<PointerType>(Ty); 792 if (PTy == 0) { 793 Error(Loc, "global variable reference must have pointer type"); 794 return 0; 795 } 796 797 // Look this name up in the normal function symbol table. 798 GlobalValue *Val = 799 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name)); 800 801 // If this is a forward reference for the value, see if we already created a 802 // forward ref record. 803 if (Val == 0) { 804 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 805 I = ForwardRefVals.find(Name); 806 if (I != ForwardRefVals.end()) 807 Val = I->second.first; 808 } 809 810 // If we have the value in the symbol table or fwd-ref table, return it. 811 if (Val) { 812 if (Val->getType() == Ty) return Val; 813 Error(Loc, "'@" + Name + "' defined with type '" + 814 Val->getType()->getDescription() + "'"); 815 return 0; 816 } 817 818 // Otherwise, create a new forward reference for this value and remember it. 819 GlobalValue *FwdVal; 820 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 821 // Function types can return opaque but functions can't. 822 if (FT->getReturnType()->isOpaqueTy()) { 823 Error(Loc, "function may not return opaque type"); 824 return 0; 825 } 826 827 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M); 828 } else { 829 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 830 GlobalValue::ExternalWeakLinkage, 0, Name); 831 } 832 833 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 834 return FwdVal; 835} 836 837GlobalValue *LLParser::GetGlobalVal(unsigned ID, const Type *Ty, LocTy Loc) { 838 const PointerType *PTy = dyn_cast<PointerType>(Ty); 839 if (PTy == 0) { 840 Error(Loc, "global variable reference must have pointer type"); 841 return 0; 842 } 843 844 GlobalValue *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 845 846 // If this is a forward reference for the value, see if we already created a 847 // forward ref record. 848 if (Val == 0) { 849 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 850 I = ForwardRefValIDs.find(ID); 851 if (I != ForwardRefValIDs.end()) 852 Val = I->second.first; 853 } 854 855 // If we have the value in the symbol table or fwd-ref table, return it. 856 if (Val) { 857 if (Val->getType() == Ty) return Val; 858 Error(Loc, "'@" + utostr(ID) + "' defined with type '" + 859 Val->getType()->getDescription() + "'"); 860 return 0; 861 } 862 863 // Otherwise, create a new forward reference for this value and remember it. 864 GlobalValue *FwdVal; 865 if (const FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) { 866 // Function types can return opaque but functions can't. 867 if (FT->getReturnType()->isOpaqueTy()) { 868 Error(Loc, "function may not return opaque type"); 869 return 0; 870 } 871 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, "", M); 872 } else { 873 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 874 GlobalValue::ExternalWeakLinkage, 0, ""); 875 } 876 877 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 878 return FwdVal; 879} 880 881 882//===----------------------------------------------------------------------===// 883// Helper Routines. 884//===----------------------------------------------------------------------===// 885 886/// ParseToken - If the current token has the specified kind, eat it and return 887/// success. Otherwise, emit the specified error and return failure. 888bool LLParser::ParseToken(lltok::Kind T, const char *ErrMsg) { 889 if (Lex.getKind() != T) 890 return TokError(ErrMsg); 891 Lex.Lex(); 892 return false; 893} 894 895/// ParseStringConstant 896/// ::= StringConstant 897bool LLParser::ParseStringConstant(std::string &Result) { 898 if (Lex.getKind() != lltok::StringConstant) 899 return TokError("expected string constant"); 900 Result = Lex.getStrVal(); 901 Lex.Lex(); 902 return false; 903} 904 905/// ParseUInt32 906/// ::= uint32 907bool LLParser::ParseUInt32(unsigned &Val) { 908 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned()) 909 return TokError("expected integer"); 910 uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(0xFFFFFFFFULL+1); 911 if (Val64 != unsigned(Val64)) 912 return TokError("expected 32-bit integer (too large)"); 913 Val = Val64; 914 Lex.Lex(); 915 return false; 916} 917 918 919/// ParseOptionalAddrSpace 920/// := /*empty*/ 921/// := 'addrspace' '(' uint32 ')' 922bool LLParser::ParseOptionalAddrSpace(unsigned &AddrSpace) { 923 AddrSpace = 0; 924 if (!EatIfPresent(lltok::kw_addrspace)) 925 return false; 926 return ParseToken(lltok::lparen, "expected '(' in address space") || 927 ParseUInt32(AddrSpace) || 928 ParseToken(lltok::rparen, "expected ')' in address space"); 929} 930 931/// ParseOptionalAttrs - Parse a potentially empty attribute list. AttrKind 932/// indicates what kind of attribute list this is: 0: function arg, 1: result, 933/// 2: function attr. 934/// 3: function arg after value: FIXME: REMOVE IN LLVM 3.0 935bool LLParser::ParseOptionalAttrs(unsigned &Attrs, unsigned AttrKind) { 936 Attrs = Attribute::None; 937 LocTy AttrLoc = Lex.getLoc(); 938 939 while (1) { 940 switch (Lex.getKind()) { 941 case lltok::kw_sext: 942 case lltok::kw_zext: 943 // Treat these as signext/zeroext if they occur in the argument list after 944 // the value, as in "call i8 @foo(i8 10 sext)". If they occur before the 945 // value, as in "call i8 @foo(i8 sext (" then it is part of a constant 946 // expr. 947 // FIXME: REMOVE THIS IN LLVM 3.0 948 if (AttrKind == 3) { 949 if (Lex.getKind() == lltok::kw_sext) 950 Attrs |= Attribute::SExt; 951 else 952 Attrs |= Attribute::ZExt; 953 break; 954 } 955 // FALL THROUGH. 956 default: // End of attributes. 957 if (AttrKind != 2 && (Attrs & Attribute::FunctionOnly)) 958 return Error(AttrLoc, "invalid use of function-only attribute"); 959 960 if (AttrKind != 0 && AttrKind != 3 && (Attrs & Attribute::ParameterOnly)) 961 return Error(AttrLoc, "invalid use of parameter-only attribute"); 962 963 return false; 964 case lltok::kw_zeroext: Attrs |= Attribute::ZExt; break; 965 case lltok::kw_signext: Attrs |= Attribute::SExt; break; 966 case lltok::kw_inreg: Attrs |= Attribute::InReg; break; 967 case lltok::kw_sret: Attrs |= Attribute::StructRet; break; 968 case lltok::kw_noalias: Attrs |= Attribute::NoAlias; break; 969 case lltok::kw_nocapture: Attrs |= Attribute::NoCapture; break; 970 case lltok::kw_byval: Attrs |= Attribute::ByVal; break; 971 case lltok::kw_nest: Attrs |= Attribute::Nest; break; 972 973 case lltok::kw_noreturn: Attrs |= Attribute::NoReturn; break; 974 case lltok::kw_nounwind: Attrs |= Attribute::NoUnwind; break; 975 case lltok::kw_noinline: Attrs |= Attribute::NoInline; break; 976 case lltok::kw_readnone: Attrs |= Attribute::ReadNone; break; 977 case lltok::kw_readonly: Attrs |= Attribute::ReadOnly; break; 978 case lltok::kw_inlinehint: Attrs |= Attribute::InlineHint; break; 979 case lltok::kw_alwaysinline: Attrs |= Attribute::AlwaysInline; break; 980 case lltok::kw_optsize: Attrs |= Attribute::OptimizeForSize; break; 981 case lltok::kw_ssp: Attrs |= Attribute::StackProtect; break; 982 case lltok::kw_sspreq: Attrs |= Attribute::StackProtectReq; break; 983 case lltok::kw_noredzone: Attrs |= Attribute::NoRedZone; break; 984 case lltok::kw_noimplicitfloat: Attrs |= Attribute::NoImplicitFloat; break; 985 case lltok::kw_naked: Attrs |= Attribute::Naked; break; 986 987 case lltok::kw_alignstack: { 988 unsigned Alignment; 989 if (ParseOptionalStackAlignment(Alignment)) 990 return true; 991 Attrs |= Attribute::constructStackAlignmentFromInt(Alignment); 992 continue; 993 } 994 995 case lltok::kw_align: { 996 unsigned Alignment; 997 if (ParseOptionalAlignment(Alignment)) 998 return true; 999 Attrs |= Attribute::constructAlignmentFromInt(Alignment); 1000 continue; 1001 } 1002 1003 } 1004 Lex.Lex(); 1005 } 1006} 1007 1008/// ParseOptionalLinkage 1009/// ::= /*empty*/ 1010/// ::= 'private' 1011/// ::= 'linker_private' 1012/// ::= 'linker_private_weak' 1013/// ::= 'linker_private_weak_def_auto' 1014/// ::= 'internal' 1015/// ::= 'weak' 1016/// ::= 'weak_odr' 1017/// ::= 'linkonce' 1018/// ::= 'linkonce_odr' 1019/// ::= 'available_externally' 1020/// ::= 'appending' 1021/// ::= 'dllexport' 1022/// ::= 'common' 1023/// ::= 'dllimport' 1024/// ::= 'extern_weak' 1025/// ::= 'external' 1026bool LLParser::ParseOptionalLinkage(unsigned &Res, bool &HasLinkage) { 1027 HasLinkage = false; 1028 switch (Lex.getKind()) { 1029 default: Res=GlobalValue::ExternalLinkage; return false; 1030 case lltok::kw_private: Res = GlobalValue::PrivateLinkage; break; 1031 case lltok::kw_linker_private: Res = GlobalValue::LinkerPrivateLinkage; break; 1032 case lltok::kw_linker_private_weak: 1033 Res = GlobalValue::LinkerPrivateWeakLinkage; 1034 break; 1035 case lltok::kw_linker_private_weak_def_auto: 1036 Res = GlobalValue::LinkerPrivateWeakDefAutoLinkage; 1037 break; 1038 case lltok::kw_internal: Res = GlobalValue::InternalLinkage; break; 1039 case lltok::kw_weak: Res = GlobalValue::WeakAnyLinkage; break; 1040 case lltok::kw_weak_odr: Res = GlobalValue::WeakODRLinkage; break; 1041 case lltok::kw_linkonce: Res = GlobalValue::LinkOnceAnyLinkage; break; 1042 case lltok::kw_linkonce_odr: Res = GlobalValue::LinkOnceODRLinkage; break; 1043 case lltok::kw_available_externally: 1044 Res = GlobalValue::AvailableExternallyLinkage; 1045 break; 1046 case lltok::kw_appending: Res = GlobalValue::AppendingLinkage; break; 1047 case lltok::kw_dllexport: Res = GlobalValue::DLLExportLinkage; break; 1048 case lltok::kw_common: Res = GlobalValue::CommonLinkage; break; 1049 case lltok::kw_dllimport: Res = GlobalValue::DLLImportLinkage; break; 1050 case lltok::kw_extern_weak: Res = GlobalValue::ExternalWeakLinkage; break; 1051 case lltok::kw_external: Res = GlobalValue::ExternalLinkage; break; 1052 } 1053 Lex.Lex(); 1054 HasLinkage = true; 1055 return false; 1056} 1057 1058/// ParseOptionalVisibility 1059/// ::= /*empty*/ 1060/// ::= 'default' 1061/// ::= 'hidden' 1062/// ::= 'protected' 1063/// 1064bool LLParser::ParseOptionalVisibility(unsigned &Res) { 1065 switch (Lex.getKind()) { 1066 default: Res = GlobalValue::DefaultVisibility; return false; 1067 case lltok::kw_default: Res = GlobalValue::DefaultVisibility; break; 1068 case lltok::kw_hidden: Res = GlobalValue::HiddenVisibility; break; 1069 case lltok::kw_protected: Res = GlobalValue::ProtectedVisibility; break; 1070 } 1071 Lex.Lex(); 1072 return false; 1073} 1074 1075/// ParseOptionalCallingConv 1076/// ::= /*empty*/ 1077/// ::= 'ccc' 1078/// ::= 'fastcc' 1079/// ::= 'coldcc' 1080/// ::= 'x86_stdcallcc' 1081/// ::= 'x86_fastcallcc' 1082/// ::= 'x86_thiscallcc' 1083/// ::= 'arm_apcscc' 1084/// ::= 'arm_aapcscc' 1085/// ::= 'arm_aapcs_vfpcc' 1086/// ::= 'msp430_intrcc' 1087/// ::= 'cc' UINT 1088/// 1089bool LLParser::ParseOptionalCallingConv(CallingConv::ID &CC) { 1090 switch (Lex.getKind()) { 1091 default: CC = CallingConv::C; return false; 1092 case lltok::kw_ccc: CC = CallingConv::C; break; 1093 case lltok::kw_fastcc: CC = CallingConv::Fast; break; 1094 case lltok::kw_coldcc: CC = CallingConv::Cold; break; 1095 case lltok::kw_x86_stdcallcc: CC = CallingConv::X86_StdCall; break; 1096 case lltok::kw_x86_fastcallcc: CC = CallingConv::X86_FastCall; break; 1097 case lltok::kw_x86_thiscallcc: CC = CallingConv::X86_ThisCall; break; 1098 case lltok::kw_arm_apcscc: CC = CallingConv::ARM_APCS; break; 1099 case lltok::kw_arm_aapcscc: CC = CallingConv::ARM_AAPCS; break; 1100 case lltok::kw_arm_aapcs_vfpcc:CC = CallingConv::ARM_AAPCS_VFP; break; 1101 case lltok::kw_msp430_intrcc: CC = CallingConv::MSP430_INTR; break; 1102 case lltok::kw_cc: { 1103 unsigned ArbitraryCC; 1104 Lex.Lex(); 1105 if (ParseUInt32(ArbitraryCC)) { 1106 return true; 1107 } else 1108 CC = static_cast<CallingConv::ID>(ArbitraryCC); 1109 return false; 1110 } 1111 break; 1112 } 1113 1114 Lex.Lex(); 1115 return false; 1116} 1117 1118/// ParseInstructionMetadata 1119/// ::= !dbg !42 (',' !dbg !57)* 1120bool LLParser::ParseInstructionMetadata(Instruction *Inst, 1121 PerFunctionState *PFS) { 1122 do { 1123 if (Lex.getKind() != lltok::MetadataVar) 1124 return TokError("expected metadata after comma"); 1125 1126 std::string Name = Lex.getStrVal(); 1127 unsigned MDK = M->getMDKindID(Name.c_str()); 1128 Lex.Lex(); 1129 1130 MDNode *Node; 1131 unsigned NodeID; 1132 SMLoc Loc = Lex.getLoc(); 1133 1134 if (ParseToken(lltok::exclaim, "expected '!' here")) 1135 return true; 1136 1137 // This code is similar to that of ParseMetadataValue, however it needs to 1138 // have special-case code for a forward reference; see the comments on 1139 // ForwardRefInstMetadata for details. Also, MDStrings are not supported 1140 // at the top level here. 1141 if (Lex.getKind() == lltok::lbrace) { 1142 ValID ID; 1143 if (ParseMetadataListValue(ID, PFS)) 1144 return true; 1145 assert(ID.Kind == ValID::t_MDNode); 1146 Inst->setMetadata(MDK, ID.MDNodeVal); 1147 } else { 1148 if (ParseMDNodeID(Node, NodeID)) 1149 return true; 1150 if (Node) { 1151 // If we got the node, add it to the instruction. 1152 Inst->setMetadata(MDK, Node); 1153 } else { 1154 MDRef R = { Loc, MDK, NodeID }; 1155 // Otherwise, remember that this should be resolved later. 1156 ForwardRefInstMetadata[Inst].push_back(R); 1157 } 1158 } 1159 1160 // If this is the end of the list, we're done. 1161 } while (EatIfPresent(lltok::comma)); 1162 return false; 1163} 1164 1165/// ParseOptionalAlignment 1166/// ::= /* empty */ 1167/// ::= 'align' 4 1168bool LLParser::ParseOptionalAlignment(unsigned &Alignment) { 1169 Alignment = 0; 1170 if (!EatIfPresent(lltok::kw_align)) 1171 return false; 1172 LocTy AlignLoc = Lex.getLoc(); 1173 if (ParseUInt32(Alignment)) return true; 1174 if (!isPowerOf2_32(Alignment)) 1175 return Error(AlignLoc, "alignment is not a power of two"); 1176 if (Alignment > Value::MaximumAlignment) 1177 return Error(AlignLoc, "huge alignments are not supported yet"); 1178 return false; 1179} 1180 1181/// ParseOptionalCommaAlign 1182/// ::= 1183/// ::= ',' align 4 1184/// 1185/// This returns with AteExtraComma set to true if it ate an excess comma at the 1186/// end. 1187bool LLParser::ParseOptionalCommaAlign(unsigned &Alignment, 1188 bool &AteExtraComma) { 1189 AteExtraComma = false; 1190 while (EatIfPresent(lltok::comma)) { 1191 // Metadata at the end is an early exit. 1192 if (Lex.getKind() == lltok::MetadataVar) { 1193 AteExtraComma = true; 1194 return false; 1195 } 1196 1197 if (Lex.getKind() != lltok::kw_align) 1198 return Error(Lex.getLoc(), "expected metadata or 'align'"); 1199 1200 LocTy AlignLoc = Lex.getLoc(); 1201 if (ParseOptionalAlignment(Alignment)) return true; 1202 } 1203 1204 return false; 1205} 1206 1207/// ParseOptionalStackAlignment 1208/// ::= /* empty */ 1209/// ::= 'alignstack' '(' 4 ')' 1210bool LLParser::ParseOptionalStackAlignment(unsigned &Alignment) { 1211 Alignment = 0; 1212 if (!EatIfPresent(lltok::kw_alignstack)) 1213 return false; 1214 LocTy ParenLoc = Lex.getLoc(); 1215 if (!EatIfPresent(lltok::lparen)) 1216 return Error(ParenLoc, "expected '('"); 1217 LocTy AlignLoc = Lex.getLoc(); 1218 if (ParseUInt32(Alignment)) return true; 1219 ParenLoc = Lex.getLoc(); 1220 if (!EatIfPresent(lltok::rparen)) 1221 return Error(ParenLoc, "expected ')'"); 1222 if (!isPowerOf2_32(Alignment)) 1223 return Error(AlignLoc, "stack alignment is not a power of two"); 1224 return false; 1225} 1226 1227/// ParseIndexList - This parses the index list for an insert/extractvalue 1228/// instruction. This sets AteExtraComma in the case where we eat an extra 1229/// comma at the end of the line and find that it is followed by metadata. 1230/// Clients that don't allow metadata can call the version of this function that 1231/// only takes one argument. 1232/// 1233/// ParseIndexList 1234/// ::= (',' uint32)+ 1235/// 1236bool LLParser::ParseIndexList(SmallVectorImpl<unsigned> &Indices, 1237 bool &AteExtraComma) { 1238 AteExtraComma = false; 1239 1240 if (Lex.getKind() != lltok::comma) 1241 return TokError("expected ',' as start of index list"); 1242 1243 while (EatIfPresent(lltok::comma)) { 1244 if (Lex.getKind() == lltok::MetadataVar) { 1245 AteExtraComma = true; 1246 return false; 1247 } 1248 unsigned Idx; 1249 if (ParseUInt32(Idx)) return true; 1250 Indices.push_back(Idx); 1251 } 1252 1253 return false; 1254} 1255 1256//===----------------------------------------------------------------------===// 1257// Type Parsing. 1258//===----------------------------------------------------------------------===// 1259 1260/// ParseType - Parse and resolve a full type. 1261bool LLParser::ParseType(PATypeHolder &Result, bool AllowVoid) { 1262 LocTy TypeLoc = Lex.getLoc(); 1263 if (ParseTypeRec(Result)) return true; 1264 1265 // Verify no unresolved uprefs. 1266 if (!UpRefs.empty()) 1267 return Error(UpRefs.back().Loc, "invalid unresolved type up reference"); 1268 1269 if (!AllowVoid && Result.get()->isVoidTy()) 1270 return Error(TypeLoc, "void type only allowed for function results"); 1271 1272 return false; 1273} 1274 1275/// HandleUpRefs - Every time we finish a new layer of types, this function is 1276/// called. It loops through the UpRefs vector, which is a list of the 1277/// currently active types. For each type, if the up-reference is contained in 1278/// the newly completed type, we decrement the level count. When the level 1279/// count reaches zero, the up-referenced type is the type that is passed in: 1280/// thus we can complete the cycle. 1281/// 1282PATypeHolder LLParser::HandleUpRefs(const Type *ty) { 1283 // If Ty isn't abstract, or if there are no up-references in it, then there is 1284 // nothing to resolve here. 1285 if (!ty->isAbstract() || UpRefs.empty()) return ty; 1286 1287 PATypeHolder Ty(ty); 1288#if 0 1289 dbgs() << "Type '" << Ty->getDescription() 1290 << "' newly formed. Resolving upreferences.\n" 1291 << UpRefs.size() << " upreferences active!\n"; 1292#endif 1293 1294 // If we find any resolvable upreferences (i.e., those whose NestingLevel goes 1295 // to zero), we resolve them all together before we resolve them to Ty. At 1296 // the end of the loop, if there is anything to resolve to Ty, it will be in 1297 // this variable. 1298 OpaqueType *TypeToResolve = 0; 1299 1300 for (unsigned i = 0; i != UpRefs.size(); ++i) { 1301 // Determine if 'Ty' directly contains this up-references 'LastContainedTy'. 1302 bool ContainsType = 1303 std::find(Ty->subtype_begin(), Ty->subtype_end(), 1304 UpRefs[i].LastContainedTy) != Ty->subtype_end(); 1305 1306#if 0 1307 dbgs() << " UR#" << i << " - TypeContains(" << Ty->getDescription() << ", " 1308 << UpRefs[i].LastContainedTy->getDescription() << ") = " 1309 << (ContainsType ? "true" : "false") 1310 << " level=" << UpRefs[i].NestingLevel << "\n"; 1311#endif 1312 if (!ContainsType) 1313 continue; 1314 1315 // Decrement level of upreference 1316 unsigned Level = --UpRefs[i].NestingLevel; 1317 UpRefs[i].LastContainedTy = Ty; 1318 1319 // If the Up-reference has a non-zero level, it shouldn't be resolved yet. 1320 if (Level != 0) 1321 continue; 1322 1323#if 0 1324 dbgs() << " * Resolving upreference for " << UpRefs[i].UpRefTy << "\n"; 1325#endif 1326 if (!TypeToResolve) 1327 TypeToResolve = UpRefs[i].UpRefTy; 1328 else 1329 UpRefs[i].UpRefTy->refineAbstractTypeTo(TypeToResolve); 1330 UpRefs.erase(UpRefs.begin()+i); // Remove from upreference list. 1331 --i; // Do not skip the next element. 1332 } 1333 1334 if (TypeToResolve) 1335 TypeToResolve->refineAbstractTypeTo(Ty); 1336 1337 return Ty; 1338} 1339 1340 1341/// ParseTypeRec - The recursive function used to process the internal 1342/// implementation details of types. 1343bool LLParser::ParseTypeRec(PATypeHolder &Result) { 1344 switch (Lex.getKind()) { 1345 default: 1346 return TokError("expected type"); 1347 case lltok::Type: 1348 // TypeRec ::= 'float' | 'void' (etc) 1349 Result = Lex.getTyVal(); 1350 Lex.Lex(); 1351 break; 1352 case lltok::kw_opaque: 1353 // TypeRec ::= 'opaque' 1354 Result = OpaqueType::get(Context); 1355 Lex.Lex(); 1356 break; 1357 case lltok::lbrace: 1358 // TypeRec ::= '{' ... '}' 1359 if (ParseStructType(Result, false)) 1360 return true; 1361 break; 1362 case lltok::lsquare: 1363 // TypeRec ::= '[' ... ']' 1364 Lex.Lex(); // eat the lsquare. 1365 if (ParseArrayVectorType(Result, false)) 1366 return true; 1367 break; 1368 case lltok::less: // Either vector or packed struct. 1369 // TypeRec ::= '<' ... '>' 1370 Lex.Lex(); 1371 if (Lex.getKind() == lltok::lbrace) { 1372 if (ParseStructType(Result, true) || 1373 ParseToken(lltok::greater, "expected '>' at end of packed struct")) 1374 return true; 1375 } else if (ParseArrayVectorType(Result, true)) 1376 return true; 1377 break; 1378 case lltok::LocalVar: 1379 case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0 1380 // TypeRec ::= %foo 1381 if (const Type *T = M->getTypeByName(Lex.getStrVal())) { 1382 Result = T; 1383 } else { 1384 Result = OpaqueType::get(Context); 1385 ForwardRefTypes.insert(std::make_pair(Lex.getStrVal(), 1386 std::make_pair(Result, 1387 Lex.getLoc()))); 1388 M->addTypeName(Lex.getStrVal(), Result.get()); 1389 } 1390 Lex.Lex(); 1391 break; 1392 1393 case lltok::LocalVarID: 1394 // TypeRec ::= %4 1395 if (Lex.getUIntVal() < NumberedTypes.size()) 1396 Result = NumberedTypes[Lex.getUIntVal()]; 1397 else { 1398 std::map<unsigned, std::pair<PATypeHolder, LocTy> >::iterator 1399 I = ForwardRefTypeIDs.find(Lex.getUIntVal()); 1400 if (I != ForwardRefTypeIDs.end()) 1401 Result = I->second.first; 1402 else { 1403 Result = OpaqueType::get(Context); 1404 ForwardRefTypeIDs.insert(std::make_pair(Lex.getUIntVal(), 1405 std::make_pair(Result, 1406 Lex.getLoc()))); 1407 } 1408 } 1409 Lex.Lex(); 1410 break; 1411 case lltok::backslash: { 1412 // TypeRec ::= '\' 4 1413 Lex.Lex(); 1414 unsigned Val; 1415 if (ParseUInt32(Val)) return true; 1416 OpaqueType *OT = OpaqueType::get(Context); //Use temporary placeholder. 1417 UpRefs.push_back(UpRefRecord(Lex.getLoc(), Val, OT)); 1418 Result = OT; 1419 break; 1420 } 1421 } 1422 1423 // Parse the type suffixes. 1424 while (1) { 1425 switch (Lex.getKind()) { 1426 // End of type. 1427 default: return false; 1428 1429 // TypeRec ::= TypeRec '*' 1430 case lltok::star: 1431 if (Result.get()->isLabelTy()) 1432 return TokError("basic block pointers are invalid"); 1433 if (Result.get()->isVoidTy()) 1434 return TokError("pointers to void are invalid; use i8* instead"); 1435 if (!PointerType::isValidElementType(Result.get())) 1436 return TokError("pointer to this type is invalid"); 1437 Result = HandleUpRefs(PointerType::getUnqual(Result.get())); 1438 Lex.Lex(); 1439 break; 1440 1441 // TypeRec ::= TypeRec 'addrspace' '(' uint32 ')' '*' 1442 case lltok::kw_addrspace: { 1443 if (Result.get()->isLabelTy()) 1444 return TokError("basic block pointers are invalid"); 1445 if (Result.get()->isVoidTy()) 1446 return TokError("pointers to void are invalid; use i8* instead"); 1447 if (!PointerType::isValidElementType(Result.get())) 1448 return TokError("pointer to this type is invalid"); 1449 unsigned AddrSpace; 1450 if (ParseOptionalAddrSpace(AddrSpace) || 1451 ParseToken(lltok::star, "expected '*' in address space")) 1452 return true; 1453 1454 Result = HandleUpRefs(PointerType::get(Result.get(), AddrSpace)); 1455 break; 1456 } 1457 1458 /// Types '(' ArgTypeListI ')' OptFuncAttrs 1459 case lltok::lparen: 1460 if (ParseFunctionType(Result)) 1461 return true; 1462 break; 1463 } 1464 } 1465} 1466 1467/// ParseParameterList 1468/// ::= '(' ')' 1469/// ::= '(' Arg (',' Arg)* ')' 1470/// Arg 1471/// ::= Type OptionalAttributes Value OptionalAttributes 1472bool LLParser::ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList, 1473 PerFunctionState &PFS) { 1474 if (ParseToken(lltok::lparen, "expected '(' in call")) 1475 return true; 1476 1477 while (Lex.getKind() != lltok::rparen) { 1478 // If this isn't the first argument, we need a comma. 1479 if (!ArgList.empty() && 1480 ParseToken(lltok::comma, "expected ',' in argument list")) 1481 return true; 1482 1483 // Parse the argument. 1484 LocTy ArgLoc; 1485 PATypeHolder ArgTy(Type::getVoidTy(Context)); 1486 unsigned ArgAttrs1 = Attribute::None; 1487 unsigned ArgAttrs2 = Attribute::None; 1488 Value *V; 1489 if (ParseType(ArgTy, ArgLoc)) 1490 return true; 1491 1492 // Otherwise, handle normal operands. 1493 if (ParseOptionalAttrs(ArgAttrs1, 0) || 1494 ParseValue(ArgTy, V, PFS) || 1495 // FIXME: Should not allow attributes after the argument, remove this 1496 // in LLVM 3.0. 1497 ParseOptionalAttrs(ArgAttrs2, 3)) 1498 return true; 1499 ArgList.push_back(ParamInfo(ArgLoc, V, ArgAttrs1|ArgAttrs2)); 1500 } 1501 1502 Lex.Lex(); // Lex the ')'. 1503 return false; 1504} 1505 1506 1507 1508/// ParseArgumentList - Parse the argument list for a function type or function 1509/// prototype. If 'inType' is true then we are parsing a FunctionType. 1510/// ::= '(' ArgTypeListI ')' 1511/// ArgTypeListI 1512/// ::= /*empty*/ 1513/// ::= '...' 1514/// ::= ArgTypeList ',' '...' 1515/// ::= ArgType (',' ArgType)* 1516/// 1517bool LLParser::ParseArgumentList(std::vector<ArgInfo> &ArgList, 1518 bool &isVarArg, bool inType) { 1519 isVarArg = false; 1520 assert(Lex.getKind() == lltok::lparen); 1521 Lex.Lex(); // eat the (. 1522 1523 if (Lex.getKind() == lltok::rparen) { 1524 // empty 1525 } else if (Lex.getKind() == lltok::dotdotdot) { 1526 isVarArg = true; 1527 Lex.Lex(); 1528 } else { 1529 LocTy TypeLoc = Lex.getLoc(); 1530 PATypeHolder ArgTy(Type::getVoidTy(Context)); 1531 unsigned Attrs; 1532 std::string Name; 1533 1534 // If we're parsing a type, use ParseTypeRec, because we allow recursive 1535 // types (such as a function returning a pointer to itself). If parsing a 1536 // function prototype, we require fully resolved types. 1537 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1538 ParseOptionalAttrs(Attrs, 0)) return true; 1539 1540 if (ArgTy->isVoidTy()) 1541 return Error(TypeLoc, "argument can not have void type"); 1542 1543 if (Lex.getKind() == lltok::LocalVar || 1544 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1545 Name = Lex.getStrVal(); 1546 Lex.Lex(); 1547 } 1548 1549 if (!FunctionType::isValidArgumentType(ArgTy)) 1550 return Error(TypeLoc, "invalid type for function argument"); 1551 1552 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1553 1554 while (EatIfPresent(lltok::comma)) { 1555 // Handle ... at end of arg list. 1556 if (EatIfPresent(lltok::dotdotdot)) { 1557 isVarArg = true; 1558 break; 1559 } 1560 1561 // Otherwise must be an argument type. 1562 TypeLoc = Lex.getLoc(); 1563 if ((inType ? ParseTypeRec(ArgTy) : ParseType(ArgTy)) || 1564 ParseOptionalAttrs(Attrs, 0)) return true; 1565 1566 if (ArgTy->isVoidTy()) 1567 return Error(TypeLoc, "argument can not have void type"); 1568 1569 if (Lex.getKind() == lltok::LocalVar || 1570 Lex.getKind() == lltok::StringConstant) { // FIXME: REMOVE IN LLVM 3.0 1571 Name = Lex.getStrVal(); 1572 Lex.Lex(); 1573 } else { 1574 Name = ""; 1575 } 1576 1577 if (!ArgTy->isFirstClassType() && !ArgTy->isOpaqueTy()) 1578 return Error(TypeLoc, "invalid type for function argument"); 1579 1580 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attrs, Name)); 1581 } 1582 } 1583 1584 return ParseToken(lltok::rparen, "expected ')' at end of argument list"); 1585} 1586 1587/// ParseFunctionType 1588/// ::= Type ArgumentList OptionalAttrs 1589bool LLParser::ParseFunctionType(PATypeHolder &Result) { 1590 assert(Lex.getKind() == lltok::lparen); 1591 1592 if (!FunctionType::isValidReturnType(Result)) 1593 return TokError("invalid function return type"); 1594 1595 std::vector<ArgInfo> ArgList; 1596 bool isVarArg; 1597 unsigned Attrs; 1598 if (ParseArgumentList(ArgList, isVarArg, true) || 1599 // FIXME: Allow, but ignore attributes on function types! 1600 // FIXME: Remove in LLVM 3.0 1601 ParseOptionalAttrs(Attrs, 2)) 1602 return true; 1603 1604 // Reject names on the arguments lists. 1605 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 1606 if (!ArgList[i].Name.empty()) 1607 return Error(ArgList[i].Loc, "argument name invalid in function type"); 1608 if (!ArgList[i].Attrs != 0) { 1609 // Allow but ignore attributes on function types; this permits 1610 // auto-upgrade. 1611 // FIXME: REJECT ATTRIBUTES ON FUNCTION TYPES in LLVM 3.0 1612 } 1613 } 1614 1615 std::vector<const Type*> ArgListTy; 1616 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 1617 ArgListTy.push_back(ArgList[i].Type); 1618 1619 Result = HandleUpRefs(FunctionType::get(Result.get(), 1620 ArgListTy, isVarArg)); 1621 return false; 1622} 1623 1624/// ParseStructType: Handles packed and unpacked types. </> parsed elsewhere. 1625/// TypeRec 1626/// ::= '{' '}' 1627/// ::= '{' TypeRec (',' TypeRec)* '}' 1628/// ::= '<' '{' '}' '>' 1629/// ::= '<' '{' TypeRec (',' TypeRec)* '}' '>' 1630bool LLParser::ParseStructType(PATypeHolder &Result, bool Packed) { 1631 assert(Lex.getKind() == lltok::lbrace); 1632 Lex.Lex(); // Consume the '{' 1633 1634 if (EatIfPresent(lltok::rbrace)) { 1635 Result = StructType::get(Context, Packed); 1636 return false; 1637 } 1638 1639 std::vector<PATypeHolder> ParamsList; 1640 LocTy EltTyLoc = Lex.getLoc(); 1641 if (ParseTypeRec(Result)) return true; 1642 ParamsList.push_back(Result); 1643 1644 if (Result->isVoidTy()) 1645 return Error(EltTyLoc, "struct element can not have void type"); 1646 if (!StructType::isValidElementType(Result)) 1647 return Error(EltTyLoc, "invalid element type for struct"); 1648 1649 while (EatIfPresent(lltok::comma)) { 1650 EltTyLoc = Lex.getLoc(); 1651 if (ParseTypeRec(Result)) return true; 1652 1653 if (Result->isVoidTy()) 1654 return Error(EltTyLoc, "struct element can not have void type"); 1655 if (!StructType::isValidElementType(Result)) 1656 return Error(EltTyLoc, "invalid element type for struct"); 1657 1658 ParamsList.push_back(Result); 1659 } 1660 1661 if (ParseToken(lltok::rbrace, "expected '}' at end of struct")) 1662 return true; 1663 1664 std::vector<const Type*> ParamsListTy; 1665 for (unsigned i = 0, e = ParamsList.size(); i != e; ++i) 1666 ParamsListTy.push_back(ParamsList[i].get()); 1667 Result = HandleUpRefs(StructType::get(Context, ParamsListTy, Packed)); 1668 return false; 1669} 1670 1671/// ParseArrayVectorType - Parse an array or vector type, assuming the first 1672/// token has already been consumed. 1673/// TypeRec 1674/// ::= '[' APSINTVAL 'x' Types ']' 1675/// ::= '<' APSINTVAL 'x' Types '>' 1676bool LLParser::ParseArrayVectorType(PATypeHolder &Result, bool isVector) { 1677 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned() || 1678 Lex.getAPSIntVal().getBitWidth() > 64) 1679 return TokError("expected number in address space"); 1680 1681 LocTy SizeLoc = Lex.getLoc(); 1682 uint64_t Size = Lex.getAPSIntVal().getZExtValue(); 1683 Lex.Lex(); 1684 1685 if (ParseToken(lltok::kw_x, "expected 'x' after element count")) 1686 return true; 1687 1688 LocTy TypeLoc = Lex.getLoc(); 1689 PATypeHolder EltTy(Type::getVoidTy(Context)); 1690 if (ParseTypeRec(EltTy)) return true; 1691 1692 if (EltTy->isVoidTy()) 1693 return Error(TypeLoc, "array and vector element type cannot be void"); 1694 1695 if (ParseToken(isVector ? lltok::greater : lltok::rsquare, 1696 "expected end of sequential type")) 1697 return true; 1698 1699 if (isVector) { 1700 if (Size == 0) 1701 return Error(SizeLoc, "zero element vector is illegal"); 1702 if ((unsigned)Size != Size) 1703 return Error(SizeLoc, "size too large for vector"); 1704 if (!VectorType::isValidElementType(EltTy)) 1705 return Error(TypeLoc, "vector element type must be fp or integer"); 1706 Result = VectorType::get(EltTy, unsigned(Size)); 1707 } else { 1708 if (!ArrayType::isValidElementType(EltTy)) 1709 return Error(TypeLoc, "invalid array element type"); 1710 Result = HandleUpRefs(ArrayType::get(EltTy, Size)); 1711 } 1712 return false; 1713} 1714 1715//===----------------------------------------------------------------------===// 1716// Function Semantic Analysis. 1717//===----------------------------------------------------------------------===// 1718 1719LLParser::PerFunctionState::PerFunctionState(LLParser &p, Function &f, 1720 int functionNumber) 1721 : P(p), F(f), FunctionNumber(functionNumber) { 1722 1723 // Insert unnamed arguments into the NumberedVals list. 1724 for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 1725 AI != E; ++AI) 1726 if (!AI->hasName()) 1727 NumberedVals.push_back(AI); 1728} 1729 1730LLParser::PerFunctionState::~PerFunctionState() { 1731 // If there were any forward referenced non-basicblock values, delete them. 1732 for (std::map<std::string, std::pair<Value*, LocTy> >::iterator 1733 I = ForwardRefVals.begin(), E = ForwardRefVals.end(); I != E; ++I) 1734 if (!isa<BasicBlock>(I->second.first)) { 1735 I->second.first->replaceAllUsesWith( 1736 UndefValue::get(I->second.first->getType())); 1737 delete I->second.first; 1738 I->second.first = 0; 1739 } 1740 1741 for (std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1742 I = ForwardRefValIDs.begin(), E = ForwardRefValIDs.end(); I != E; ++I) 1743 if (!isa<BasicBlock>(I->second.first)) { 1744 I->second.first->replaceAllUsesWith( 1745 UndefValue::get(I->second.first->getType())); 1746 delete I->second.first; 1747 I->second.first = 0; 1748 } 1749} 1750 1751bool LLParser::PerFunctionState::FinishFunction() { 1752 // Check to see if someone took the address of labels in this block. 1753 if (!P.ForwardRefBlockAddresses.empty()) { 1754 ValID FunctionID; 1755 if (!F.getName().empty()) { 1756 FunctionID.Kind = ValID::t_GlobalName; 1757 FunctionID.StrVal = F.getName(); 1758 } else { 1759 FunctionID.Kind = ValID::t_GlobalID; 1760 FunctionID.UIntVal = FunctionNumber; 1761 } 1762 1763 std::map<ValID, std::vector<std::pair<ValID, GlobalValue*> > >::iterator 1764 FRBAI = P.ForwardRefBlockAddresses.find(FunctionID); 1765 if (FRBAI != P.ForwardRefBlockAddresses.end()) { 1766 // Resolve all these references. 1767 if (P.ResolveForwardRefBlockAddresses(&F, FRBAI->second, this)) 1768 return true; 1769 1770 P.ForwardRefBlockAddresses.erase(FRBAI); 1771 } 1772 } 1773 1774 if (!ForwardRefVals.empty()) 1775 return P.Error(ForwardRefVals.begin()->second.second, 1776 "use of undefined value '%" + ForwardRefVals.begin()->first + 1777 "'"); 1778 if (!ForwardRefValIDs.empty()) 1779 return P.Error(ForwardRefValIDs.begin()->second.second, 1780 "use of undefined value '%" + 1781 utostr(ForwardRefValIDs.begin()->first) + "'"); 1782 return false; 1783} 1784 1785 1786/// GetVal - Get a value with the specified name or ID, creating a 1787/// forward reference record if needed. This can return null if the value 1788/// exists but does not have the right type. 1789Value *LLParser::PerFunctionState::GetVal(const std::string &Name, 1790 const Type *Ty, LocTy Loc) { 1791 // Look this name up in the normal function symbol table. 1792 Value *Val = F.getValueSymbolTable().lookup(Name); 1793 1794 // If this is a forward reference for the value, see if we already created a 1795 // forward ref record. 1796 if (Val == 0) { 1797 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1798 I = ForwardRefVals.find(Name); 1799 if (I != ForwardRefVals.end()) 1800 Val = I->second.first; 1801 } 1802 1803 // If we have the value in the symbol table or fwd-ref table, return it. 1804 if (Val) { 1805 if (Val->getType() == Ty) return Val; 1806 if (Ty->isLabelTy()) 1807 P.Error(Loc, "'%" + Name + "' is not a basic block"); 1808 else 1809 P.Error(Loc, "'%" + Name + "' defined with type '" + 1810 Val->getType()->getDescription() + "'"); 1811 return 0; 1812 } 1813 1814 // Don't make placeholders with invalid type. 1815 if (!Ty->isFirstClassType() && !Ty->isOpaqueTy() && !Ty->isLabelTy()) { 1816 P.Error(Loc, "invalid use of a non-first-class type"); 1817 return 0; 1818 } 1819 1820 // Otherwise, create a new forward reference for this value and remember it. 1821 Value *FwdVal; 1822 if (Ty->isLabelTy()) 1823 FwdVal = BasicBlock::Create(F.getContext(), Name, &F); 1824 else 1825 FwdVal = new Argument(Ty, Name); 1826 1827 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 1828 return FwdVal; 1829} 1830 1831Value *LLParser::PerFunctionState::GetVal(unsigned ID, const Type *Ty, 1832 LocTy Loc) { 1833 // Look this name up in the normal function symbol table. 1834 Value *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 1835 1836 // If this is a forward reference for the value, see if we already created a 1837 // forward ref record. 1838 if (Val == 0) { 1839 std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1840 I = ForwardRefValIDs.find(ID); 1841 if (I != ForwardRefValIDs.end()) 1842 Val = I->second.first; 1843 } 1844 1845 // If we have the value in the symbol table or fwd-ref table, return it. 1846 if (Val) { 1847 if (Val->getType() == Ty) return Val; 1848 if (Ty->isLabelTy()) 1849 P.Error(Loc, "'%" + utostr(ID) + "' is not a basic block"); 1850 else 1851 P.Error(Loc, "'%" + utostr(ID) + "' defined with type '" + 1852 Val->getType()->getDescription() + "'"); 1853 return 0; 1854 } 1855 1856 if (!Ty->isFirstClassType() && !Ty->isOpaqueTy() && !Ty->isLabelTy()) { 1857 P.Error(Loc, "invalid use of a non-first-class type"); 1858 return 0; 1859 } 1860 1861 // Otherwise, create a new forward reference for this value and remember it. 1862 Value *FwdVal; 1863 if (Ty->isLabelTy()) 1864 FwdVal = BasicBlock::Create(F.getContext(), "", &F); 1865 else 1866 FwdVal = new Argument(Ty); 1867 1868 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 1869 return FwdVal; 1870} 1871 1872/// SetInstName - After an instruction is parsed and inserted into its 1873/// basic block, this installs its name. 1874bool LLParser::PerFunctionState::SetInstName(int NameID, 1875 const std::string &NameStr, 1876 LocTy NameLoc, Instruction *Inst) { 1877 // If this instruction has void type, it cannot have a name or ID specified. 1878 if (Inst->getType()->isVoidTy()) { 1879 if (NameID != -1 || !NameStr.empty()) 1880 return P.Error(NameLoc, "instructions returning void cannot have a name"); 1881 return false; 1882 } 1883 1884 // If this was a numbered instruction, verify that the instruction is the 1885 // expected value and resolve any forward references. 1886 if (NameStr.empty()) { 1887 // If neither a name nor an ID was specified, just use the next ID. 1888 if (NameID == -1) 1889 NameID = NumberedVals.size(); 1890 1891 if (unsigned(NameID) != NumberedVals.size()) 1892 return P.Error(NameLoc, "instruction expected to be numbered '%" + 1893 utostr(NumberedVals.size()) + "'"); 1894 1895 std::map<unsigned, std::pair<Value*, LocTy> >::iterator FI = 1896 ForwardRefValIDs.find(NameID); 1897 if (FI != ForwardRefValIDs.end()) { 1898 if (FI->second.first->getType() != Inst->getType()) 1899 return P.Error(NameLoc, "instruction forward referenced with type '" + 1900 FI->second.first->getType()->getDescription() + "'"); 1901 FI->second.first->replaceAllUsesWith(Inst); 1902 delete FI->second.first; 1903 ForwardRefValIDs.erase(FI); 1904 } 1905 1906 NumberedVals.push_back(Inst); 1907 return false; 1908 } 1909 1910 // Otherwise, the instruction had a name. Resolve forward refs and set it. 1911 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1912 FI = ForwardRefVals.find(NameStr); 1913 if (FI != ForwardRefVals.end()) { 1914 if (FI->second.first->getType() != Inst->getType()) 1915 return P.Error(NameLoc, "instruction forward referenced with type '" + 1916 FI->second.first->getType()->getDescription() + "'"); 1917 FI->second.first->replaceAllUsesWith(Inst); 1918 delete FI->second.first; 1919 ForwardRefVals.erase(FI); 1920 } 1921 1922 // Set the name on the instruction. 1923 Inst->setName(NameStr); 1924 1925 if (Inst->getNameStr() != NameStr) 1926 return P.Error(NameLoc, "multiple definition of local value named '" + 1927 NameStr + "'"); 1928 return false; 1929} 1930 1931/// GetBB - Get a basic block with the specified name or ID, creating a 1932/// forward reference record if needed. 1933BasicBlock *LLParser::PerFunctionState::GetBB(const std::string &Name, 1934 LocTy Loc) { 1935 return cast_or_null<BasicBlock>(GetVal(Name, 1936 Type::getLabelTy(F.getContext()), Loc)); 1937} 1938 1939BasicBlock *LLParser::PerFunctionState::GetBB(unsigned ID, LocTy Loc) { 1940 return cast_or_null<BasicBlock>(GetVal(ID, 1941 Type::getLabelTy(F.getContext()), Loc)); 1942} 1943 1944/// DefineBB - Define the specified basic block, which is either named or 1945/// unnamed. If there is an error, this returns null otherwise it returns 1946/// the block being defined. 1947BasicBlock *LLParser::PerFunctionState::DefineBB(const std::string &Name, 1948 LocTy Loc) { 1949 BasicBlock *BB; 1950 if (Name.empty()) 1951 BB = GetBB(NumberedVals.size(), Loc); 1952 else 1953 BB = GetBB(Name, Loc); 1954 if (BB == 0) return 0; // Already diagnosed error. 1955 1956 // Move the block to the end of the function. Forward ref'd blocks are 1957 // inserted wherever they happen to be referenced. 1958 F.getBasicBlockList().splice(F.end(), F.getBasicBlockList(), BB); 1959 1960 // Remove the block from forward ref sets. 1961 if (Name.empty()) { 1962 ForwardRefValIDs.erase(NumberedVals.size()); 1963 NumberedVals.push_back(BB); 1964 } else { 1965 // BB forward references are already in the function symbol table. 1966 ForwardRefVals.erase(Name); 1967 } 1968 1969 return BB; 1970} 1971 1972//===----------------------------------------------------------------------===// 1973// Constants. 1974//===----------------------------------------------------------------------===// 1975 1976/// ParseValID - Parse an abstract value that doesn't necessarily have a 1977/// type implied. For example, if we parse "4" we don't know what integer type 1978/// it has. The value will later be combined with its type and checked for 1979/// sanity. PFS is used to convert function-local operands of metadata (since 1980/// metadata operands are not just parsed here but also converted to values). 1981/// PFS can be null when we are not parsing metadata values inside a function. 1982bool LLParser::ParseValID(ValID &ID, PerFunctionState *PFS) { 1983 ID.Loc = Lex.getLoc(); 1984 switch (Lex.getKind()) { 1985 default: return TokError("expected value token"); 1986 case lltok::GlobalID: // @42 1987 ID.UIntVal = Lex.getUIntVal(); 1988 ID.Kind = ValID::t_GlobalID; 1989 break; 1990 case lltok::GlobalVar: // @foo 1991 ID.StrVal = Lex.getStrVal(); 1992 ID.Kind = ValID::t_GlobalName; 1993 break; 1994 case lltok::LocalVarID: // %42 1995 ID.UIntVal = Lex.getUIntVal(); 1996 ID.Kind = ValID::t_LocalID; 1997 break; 1998 case lltok::LocalVar: // %foo 1999 case lltok::StringConstant: // "foo" - FIXME: REMOVE IN LLVM 3.0 2000 ID.StrVal = Lex.getStrVal(); 2001 ID.Kind = ValID::t_LocalName; 2002 break; 2003 case lltok::exclaim: // !42, !{...}, or !"foo" 2004 return ParseMetadataValue(ID, PFS); 2005 case lltok::APSInt: 2006 ID.APSIntVal = Lex.getAPSIntVal(); 2007 ID.Kind = ValID::t_APSInt; 2008 break; 2009 case lltok::APFloat: 2010 ID.APFloatVal = Lex.getAPFloatVal(); 2011 ID.Kind = ValID::t_APFloat; 2012 break; 2013 case lltok::kw_true: 2014 ID.ConstantVal = ConstantInt::getTrue(Context); 2015 ID.Kind = ValID::t_Constant; 2016 break; 2017 case lltok::kw_false: 2018 ID.ConstantVal = ConstantInt::getFalse(Context); 2019 ID.Kind = ValID::t_Constant; 2020 break; 2021 case lltok::kw_null: ID.Kind = ValID::t_Null; break; 2022 case lltok::kw_undef: ID.Kind = ValID::t_Undef; break; 2023 case lltok::kw_zeroinitializer: ID.Kind = ValID::t_Zero; break; 2024 2025 case lltok::lbrace: { 2026 // ValID ::= '{' ConstVector '}' 2027 Lex.Lex(); 2028 SmallVector<Constant*, 16> Elts; 2029 if (ParseGlobalValueVector(Elts) || 2030 ParseToken(lltok::rbrace, "expected end of struct constant")) 2031 return true; 2032 2033 ID.ConstantVal = ConstantStruct::get(Context, Elts.data(), 2034 Elts.size(), false); 2035 ID.Kind = ValID::t_Constant; 2036 return false; 2037 } 2038 case lltok::less: { 2039 // ValID ::= '<' ConstVector '>' --> Vector. 2040 // ValID ::= '<' '{' ConstVector '}' '>' --> Packed Struct. 2041 Lex.Lex(); 2042 bool isPackedStruct = EatIfPresent(lltok::lbrace); 2043 2044 SmallVector<Constant*, 16> Elts; 2045 LocTy FirstEltLoc = Lex.getLoc(); 2046 if (ParseGlobalValueVector(Elts) || 2047 (isPackedStruct && 2048 ParseToken(lltok::rbrace, "expected end of packed struct")) || 2049 ParseToken(lltok::greater, "expected end of constant")) 2050 return true; 2051 2052 if (isPackedStruct) { 2053 ID.ConstantVal = 2054 ConstantStruct::get(Context, Elts.data(), Elts.size(), true); 2055 ID.Kind = ValID::t_Constant; 2056 return false; 2057 } 2058 2059 if (Elts.empty()) 2060 return Error(ID.Loc, "constant vector must not be empty"); 2061 2062 if (!Elts[0]->getType()->isIntegerTy() && 2063 !Elts[0]->getType()->isFloatingPointTy()) 2064 return Error(FirstEltLoc, 2065 "vector elements must have integer or floating point type"); 2066 2067 // Verify that all the vector elements have the same type. 2068 for (unsigned i = 1, e = Elts.size(); i != e; ++i) 2069 if (Elts[i]->getType() != Elts[0]->getType()) 2070 return Error(FirstEltLoc, 2071 "vector element #" + utostr(i) + 2072 " is not of type '" + Elts[0]->getType()->getDescription()); 2073 2074 ID.ConstantVal = ConstantVector::get(Elts.data(), Elts.size()); 2075 ID.Kind = ValID::t_Constant; 2076 return false; 2077 } 2078 case lltok::lsquare: { // Array Constant 2079 Lex.Lex(); 2080 SmallVector<Constant*, 16> Elts; 2081 LocTy FirstEltLoc = Lex.getLoc(); 2082 if (ParseGlobalValueVector(Elts) || 2083 ParseToken(lltok::rsquare, "expected end of array constant")) 2084 return true; 2085 2086 // Handle empty element. 2087 if (Elts.empty()) { 2088 // Use undef instead of an array because it's inconvenient to determine 2089 // the element type at this point, there being no elements to examine. 2090 ID.Kind = ValID::t_EmptyArray; 2091 return false; 2092 } 2093 2094 if (!Elts[0]->getType()->isFirstClassType()) 2095 return Error(FirstEltLoc, "invalid array element type: " + 2096 Elts[0]->getType()->getDescription()); 2097 2098 ArrayType *ATy = ArrayType::get(Elts[0]->getType(), Elts.size()); 2099 2100 // Verify all elements are correct type! 2101 for (unsigned i = 0, e = Elts.size(); i != e; ++i) { 2102 if (Elts[i]->getType() != Elts[0]->getType()) 2103 return Error(FirstEltLoc, 2104 "array element #" + utostr(i) + 2105 " is not of type '" +Elts[0]->getType()->getDescription()); 2106 } 2107 2108 ID.ConstantVal = ConstantArray::get(ATy, Elts.data(), Elts.size()); 2109 ID.Kind = ValID::t_Constant; 2110 return false; 2111 } 2112 case lltok::kw_c: // c "foo" 2113 Lex.Lex(); 2114 ID.ConstantVal = ConstantArray::get(Context, Lex.getStrVal(), false); 2115 if (ParseToken(lltok::StringConstant, "expected string")) return true; 2116 ID.Kind = ValID::t_Constant; 2117 return false; 2118 2119 case lltok::kw_asm: { 2120 // ValID ::= 'asm' SideEffect? AlignStack? STRINGCONSTANT ',' STRINGCONSTANT 2121 bool HasSideEffect, AlignStack; 2122 Lex.Lex(); 2123 if (ParseOptionalToken(lltok::kw_sideeffect, HasSideEffect) || 2124 ParseOptionalToken(lltok::kw_alignstack, AlignStack) || 2125 ParseStringConstant(ID.StrVal) || 2126 ParseToken(lltok::comma, "expected comma in inline asm expression") || 2127 ParseToken(lltok::StringConstant, "expected constraint string")) 2128 return true; 2129 ID.StrVal2 = Lex.getStrVal(); 2130 ID.UIntVal = unsigned(HasSideEffect) | (unsigned(AlignStack)<<1); 2131 ID.Kind = ValID::t_InlineAsm; 2132 return false; 2133 } 2134 2135 case lltok::kw_blockaddress: { 2136 // ValID ::= 'blockaddress' '(' @foo ',' %bar ')' 2137 Lex.Lex(); 2138 2139 ValID Fn, Label; 2140 LocTy FnLoc, LabelLoc; 2141 2142 if (ParseToken(lltok::lparen, "expected '(' in block address expression") || 2143 ParseValID(Fn) || 2144 ParseToken(lltok::comma, "expected comma in block address expression")|| 2145 ParseValID(Label) || 2146 ParseToken(lltok::rparen, "expected ')' in block address expression")) 2147 return true; 2148 2149 if (Fn.Kind != ValID::t_GlobalID && Fn.Kind != ValID::t_GlobalName) 2150 return Error(Fn.Loc, "expected function name in blockaddress"); 2151 if (Label.Kind != ValID::t_LocalID && Label.Kind != ValID::t_LocalName) 2152 return Error(Label.Loc, "expected basic block name in blockaddress"); 2153 2154 // Make a global variable as a placeholder for this reference. 2155 GlobalVariable *FwdRef = new GlobalVariable(*M, Type::getInt8Ty(Context), 2156 false, GlobalValue::InternalLinkage, 2157 0, ""); 2158 ForwardRefBlockAddresses[Fn].push_back(std::make_pair(Label, FwdRef)); 2159 ID.ConstantVal = FwdRef; 2160 ID.Kind = ValID::t_Constant; 2161 return false; 2162 } 2163 2164 case lltok::kw_trunc: 2165 case lltok::kw_zext: 2166 case lltok::kw_sext: 2167 case lltok::kw_fptrunc: 2168 case lltok::kw_fpext: 2169 case lltok::kw_bitcast: 2170 case lltok::kw_uitofp: 2171 case lltok::kw_sitofp: 2172 case lltok::kw_fptoui: 2173 case lltok::kw_fptosi: 2174 case lltok::kw_inttoptr: 2175 case lltok::kw_ptrtoint: { 2176 unsigned Opc = Lex.getUIntVal(); 2177 PATypeHolder DestTy(Type::getVoidTy(Context)); 2178 Constant *SrcVal; 2179 Lex.Lex(); 2180 if (ParseToken(lltok::lparen, "expected '(' after constantexpr cast") || 2181 ParseGlobalTypeAndValue(SrcVal) || 2182 ParseToken(lltok::kw_to, "expected 'to' in constantexpr cast") || 2183 ParseType(DestTy) || 2184 ParseToken(lltok::rparen, "expected ')' at end of constantexpr cast")) 2185 return true; 2186 if (!CastInst::castIsValid((Instruction::CastOps)Opc, SrcVal, DestTy)) 2187 return Error(ID.Loc, "invalid cast opcode for cast from '" + 2188 SrcVal->getType()->getDescription() + "' to '" + 2189 DestTy->getDescription() + "'"); 2190 ID.ConstantVal = ConstantExpr::getCast((Instruction::CastOps)Opc, 2191 SrcVal, DestTy); 2192 ID.Kind = ValID::t_Constant; 2193 return false; 2194 } 2195 case lltok::kw_extractvalue: { 2196 Lex.Lex(); 2197 Constant *Val; 2198 SmallVector<unsigned, 4> Indices; 2199 if (ParseToken(lltok::lparen, "expected '(' in extractvalue constantexpr")|| 2200 ParseGlobalTypeAndValue(Val) || 2201 ParseIndexList(Indices) || 2202 ParseToken(lltok::rparen, "expected ')' in extractvalue constantexpr")) 2203 return true; 2204 2205 if (!Val->getType()->isAggregateType()) 2206 return Error(ID.Loc, "extractvalue operand must be aggregate type"); 2207 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 2208 Indices.end())) 2209 return Error(ID.Loc, "invalid indices for extractvalue"); 2210 ID.ConstantVal = 2211 ConstantExpr::getExtractValue(Val, Indices.data(), Indices.size()); 2212 ID.Kind = ValID::t_Constant; 2213 return false; 2214 } 2215 case lltok::kw_insertvalue: { 2216 Lex.Lex(); 2217 Constant *Val0, *Val1; 2218 SmallVector<unsigned, 4> Indices; 2219 if (ParseToken(lltok::lparen, "expected '(' in insertvalue constantexpr")|| 2220 ParseGlobalTypeAndValue(Val0) || 2221 ParseToken(lltok::comma, "expected comma in insertvalue constantexpr")|| 2222 ParseGlobalTypeAndValue(Val1) || 2223 ParseIndexList(Indices) || 2224 ParseToken(lltok::rparen, "expected ')' in insertvalue constantexpr")) 2225 return true; 2226 if (!Val0->getType()->isAggregateType()) 2227 return Error(ID.Loc, "insertvalue operand must be aggregate type"); 2228 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 2229 Indices.end())) 2230 return Error(ID.Loc, "invalid indices for insertvalue"); 2231 ID.ConstantVal = ConstantExpr::getInsertValue(Val0, Val1, 2232 Indices.data(), Indices.size()); 2233 ID.Kind = ValID::t_Constant; 2234 return false; 2235 } 2236 case lltok::kw_icmp: 2237 case lltok::kw_fcmp: { 2238 unsigned PredVal, Opc = Lex.getUIntVal(); 2239 Constant *Val0, *Val1; 2240 Lex.Lex(); 2241 if (ParseCmpPredicate(PredVal, Opc) || 2242 ParseToken(lltok::lparen, "expected '(' in compare constantexpr") || 2243 ParseGlobalTypeAndValue(Val0) || 2244 ParseToken(lltok::comma, "expected comma in compare constantexpr") || 2245 ParseGlobalTypeAndValue(Val1) || 2246 ParseToken(lltok::rparen, "expected ')' in compare constantexpr")) 2247 return true; 2248 2249 if (Val0->getType() != Val1->getType()) 2250 return Error(ID.Loc, "compare operands must have the same type"); 2251 2252 CmpInst::Predicate Pred = (CmpInst::Predicate)PredVal; 2253 2254 if (Opc == Instruction::FCmp) { 2255 if (!Val0->getType()->isFPOrFPVectorTy()) 2256 return Error(ID.Loc, "fcmp requires floating point operands"); 2257 ID.ConstantVal = ConstantExpr::getFCmp(Pred, Val0, Val1); 2258 } else { 2259 assert(Opc == Instruction::ICmp && "Unexpected opcode for CmpInst!"); 2260 if (!Val0->getType()->isIntOrIntVectorTy() && 2261 !Val0->getType()->isPointerTy()) 2262 return Error(ID.Loc, "icmp requires pointer or integer operands"); 2263 ID.ConstantVal = ConstantExpr::getICmp(Pred, Val0, Val1); 2264 } 2265 ID.Kind = ValID::t_Constant; 2266 return false; 2267 } 2268 2269 // Binary Operators. 2270 case lltok::kw_add: 2271 case lltok::kw_fadd: 2272 case lltok::kw_sub: 2273 case lltok::kw_fsub: 2274 case lltok::kw_mul: 2275 case lltok::kw_fmul: 2276 case lltok::kw_udiv: 2277 case lltok::kw_sdiv: 2278 case lltok::kw_fdiv: 2279 case lltok::kw_urem: 2280 case lltok::kw_srem: 2281 case lltok::kw_frem: { 2282 bool NUW = false; 2283 bool NSW = false; 2284 bool Exact = false; 2285 unsigned Opc = Lex.getUIntVal(); 2286 Constant *Val0, *Val1; 2287 Lex.Lex(); 2288 LocTy ModifierLoc = Lex.getLoc(); 2289 if (Opc == Instruction::Add || 2290 Opc == Instruction::Sub || 2291 Opc == Instruction::Mul) { 2292 if (EatIfPresent(lltok::kw_nuw)) 2293 NUW = true; 2294 if (EatIfPresent(lltok::kw_nsw)) { 2295 NSW = true; 2296 if (EatIfPresent(lltok::kw_nuw)) 2297 NUW = true; 2298 } 2299 } else if (Opc == Instruction::SDiv) { 2300 if (EatIfPresent(lltok::kw_exact)) 2301 Exact = true; 2302 } 2303 if (ParseToken(lltok::lparen, "expected '(' in binary constantexpr") || 2304 ParseGlobalTypeAndValue(Val0) || 2305 ParseToken(lltok::comma, "expected comma in binary constantexpr") || 2306 ParseGlobalTypeAndValue(Val1) || 2307 ParseToken(lltok::rparen, "expected ')' in binary constantexpr")) 2308 return true; 2309 if (Val0->getType() != Val1->getType()) 2310 return Error(ID.Loc, "operands of constexpr must have same type"); 2311 if (!Val0->getType()->isIntOrIntVectorTy()) { 2312 if (NUW) 2313 return Error(ModifierLoc, "nuw only applies to integer operations"); 2314 if (NSW) 2315 return Error(ModifierLoc, "nsw only applies to integer operations"); 2316 } 2317 // Check that the type is valid for the operator. 2318 switch (Opc) { 2319 case Instruction::Add: 2320 case Instruction::Sub: 2321 case Instruction::Mul: 2322 case Instruction::UDiv: 2323 case Instruction::SDiv: 2324 case Instruction::URem: 2325 case Instruction::SRem: 2326 if (!Val0->getType()->isIntOrIntVectorTy()) 2327 return Error(ID.Loc, "constexpr requires integer operands"); 2328 break; 2329 case Instruction::FAdd: 2330 case Instruction::FSub: 2331 case Instruction::FMul: 2332 case Instruction::FDiv: 2333 case Instruction::FRem: 2334 if (!Val0->getType()->isFPOrFPVectorTy()) 2335 return Error(ID.Loc, "constexpr requires fp operands"); 2336 break; 2337 default: llvm_unreachable("Unknown binary operator!"); 2338 } 2339 unsigned Flags = 0; 2340 if (NUW) Flags |= OverflowingBinaryOperator::NoUnsignedWrap; 2341 if (NSW) Flags |= OverflowingBinaryOperator::NoSignedWrap; 2342 if (Exact) Flags |= SDivOperator::IsExact; 2343 Constant *C = ConstantExpr::get(Opc, Val0, Val1, Flags); 2344 ID.ConstantVal = C; 2345 ID.Kind = ValID::t_Constant; 2346 return false; 2347 } 2348 2349 // Logical Operations 2350 case lltok::kw_shl: 2351 case lltok::kw_lshr: 2352 case lltok::kw_ashr: 2353 case lltok::kw_and: 2354 case lltok::kw_or: 2355 case lltok::kw_xor: { 2356 unsigned Opc = Lex.getUIntVal(); 2357 Constant *Val0, *Val1; 2358 Lex.Lex(); 2359 if (ParseToken(lltok::lparen, "expected '(' in logical constantexpr") || 2360 ParseGlobalTypeAndValue(Val0) || 2361 ParseToken(lltok::comma, "expected comma in logical constantexpr") || 2362 ParseGlobalTypeAndValue(Val1) || 2363 ParseToken(lltok::rparen, "expected ')' in logical constantexpr")) 2364 return true; 2365 if (Val0->getType() != Val1->getType()) 2366 return Error(ID.Loc, "operands of constexpr must have same type"); 2367 if (!Val0->getType()->isIntOrIntVectorTy()) 2368 return Error(ID.Loc, 2369 "constexpr requires integer or integer vector operands"); 2370 ID.ConstantVal = ConstantExpr::get(Opc, Val0, Val1); 2371 ID.Kind = ValID::t_Constant; 2372 return false; 2373 } 2374 2375 case lltok::kw_getelementptr: 2376 case lltok::kw_shufflevector: 2377 case lltok::kw_insertelement: 2378 case lltok::kw_extractelement: 2379 case lltok::kw_select: { 2380 unsigned Opc = Lex.getUIntVal(); 2381 SmallVector<Constant*, 16> Elts; 2382 bool InBounds = false; 2383 Lex.Lex(); 2384 if (Opc == Instruction::GetElementPtr) 2385 InBounds = EatIfPresent(lltok::kw_inbounds); 2386 if (ParseToken(lltok::lparen, "expected '(' in constantexpr") || 2387 ParseGlobalValueVector(Elts) || 2388 ParseToken(lltok::rparen, "expected ')' in constantexpr")) 2389 return true; 2390 2391 if (Opc == Instruction::GetElementPtr) { 2392 if (Elts.size() == 0 || !Elts[0]->getType()->isPointerTy()) 2393 return Error(ID.Loc, "getelementptr requires pointer operand"); 2394 2395 if (!GetElementPtrInst::getIndexedType(Elts[0]->getType(), 2396 (Value**)(Elts.data() + 1), 2397 Elts.size() - 1)) 2398 return Error(ID.Loc, "invalid indices for getelementptr"); 2399 ID.ConstantVal = InBounds ? 2400 ConstantExpr::getInBoundsGetElementPtr(Elts[0], 2401 Elts.data() + 1, 2402 Elts.size() - 1) : 2403 ConstantExpr::getGetElementPtr(Elts[0], 2404 Elts.data() + 1, Elts.size() - 1); 2405 } else if (Opc == Instruction::Select) { 2406 if (Elts.size() != 3) 2407 return Error(ID.Loc, "expected three operands to select"); 2408 if (const char *Reason = SelectInst::areInvalidOperands(Elts[0], Elts[1], 2409 Elts[2])) 2410 return Error(ID.Loc, Reason); 2411 ID.ConstantVal = ConstantExpr::getSelect(Elts[0], Elts[1], Elts[2]); 2412 } else if (Opc == Instruction::ShuffleVector) { 2413 if (Elts.size() != 3) 2414 return Error(ID.Loc, "expected three operands to shufflevector"); 2415 if (!ShuffleVectorInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2416 return Error(ID.Loc, "invalid operands to shufflevector"); 2417 ID.ConstantVal = 2418 ConstantExpr::getShuffleVector(Elts[0], Elts[1],Elts[2]); 2419 } else if (Opc == Instruction::ExtractElement) { 2420 if (Elts.size() != 2) 2421 return Error(ID.Loc, "expected two operands to extractelement"); 2422 if (!ExtractElementInst::isValidOperands(Elts[0], Elts[1])) 2423 return Error(ID.Loc, "invalid extractelement operands"); 2424 ID.ConstantVal = ConstantExpr::getExtractElement(Elts[0], Elts[1]); 2425 } else { 2426 assert(Opc == Instruction::InsertElement && "Unknown opcode"); 2427 if (Elts.size() != 3) 2428 return Error(ID.Loc, "expected three operands to insertelement"); 2429 if (!InsertElementInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2430 return Error(ID.Loc, "invalid insertelement operands"); 2431 ID.ConstantVal = 2432 ConstantExpr::getInsertElement(Elts[0], Elts[1],Elts[2]); 2433 } 2434 2435 ID.Kind = ValID::t_Constant; 2436 return false; 2437 } 2438 } 2439 2440 Lex.Lex(); 2441 return false; 2442} 2443 2444/// ParseGlobalValue - Parse a global value with the specified type. 2445bool LLParser::ParseGlobalValue(const Type *Ty, Constant *&C) { 2446 C = 0; 2447 ValID ID; 2448 Value *V = NULL; 2449 bool Parsed = ParseValID(ID) || 2450 ConvertValIDToValue(Ty, ID, V, NULL); 2451 if (V && !(C = dyn_cast<Constant>(V))) 2452 return Error(ID.Loc, "global values must be constants"); 2453 return Parsed; 2454} 2455 2456bool LLParser::ParseGlobalTypeAndValue(Constant *&V) { 2457 PATypeHolder Type(Type::getVoidTy(Context)); 2458 return ParseType(Type) || 2459 ParseGlobalValue(Type, V); 2460} 2461 2462/// ParseGlobalValueVector 2463/// ::= /*empty*/ 2464/// ::= TypeAndValue (',' TypeAndValue)* 2465bool LLParser::ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts) { 2466 // Empty list. 2467 if (Lex.getKind() == lltok::rbrace || 2468 Lex.getKind() == lltok::rsquare || 2469 Lex.getKind() == lltok::greater || 2470 Lex.getKind() == lltok::rparen) 2471 return false; 2472 2473 Constant *C; 2474 if (ParseGlobalTypeAndValue(C)) return true; 2475 Elts.push_back(C); 2476 2477 while (EatIfPresent(lltok::comma)) { 2478 if (ParseGlobalTypeAndValue(C)) return true; 2479 Elts.push_back(C); 2480 } 2481 2482 return false; 2483} 2484 2485bool LLParser::ParseMetadataListValue(ValID &ID, PerFunctionState *PFS) { 2486 assert(Lex.getKind() == lltok::lbrace); 2487 Lex.Lex(); 2488 2489 SmallVector<Value*, 16> Elts; 2490 if (ParseMDNodeVector(Elts, PFS) || 2491 ParseToken(lltok::rbrace, "expected end of metadata node")) 2492 return true; 2493 2494 ID.MDNodeVal = MDNode::get(Context, Elts.data(), Elts.size()); 2495 ID.Kind = ValID::t_MDNode; 2496 return false; 2497} 2498 2499/// ParseMetadataValue 2500/// ::= !42 2501/// ::= !{...} 2502/// ::= !"string" 2503bool LLParser::ParseMetadataValue(ValID &ID, PerFunctionState *PFS) { 2504 assert(Lex.getKind() == lltok::exclaim); 2505 Lex.Lex(); 2506 2507 // MDNode: 2508 // !{ ... } 2509 if (Lex.getKind() == lltok::lbrace) 2510 return ParseMetadataListValue(ID, PFS); 2511 2512 // Standalone metadata reference 2513 // !42 2514 if (Lex.getKind() == lltok::APSInt) { 2515 if (ParseMDNodeID(ID.MDNodeVal)) return true; 2516 ID.Kind = ValID::t_MDNode; 2517 return false; 2518 } 2519 2520 // MDString: 2521 // ::= '!' STRINGCONSTANT 2522 if (ParseMDString(ID.MDStringVal)) return true; 2523 ID.Kind = ValID::t_MDString; 2524 return false; 2525} 2526 2527 2528//===----------------------------------------------------------------------===// 2529// Function Parsing. 2530//===----------------------------------------------------------------------===// 2531 2532bool LLParser::ConvertValIDToValue(const Type *Ty, ValID &ID, Value *&V, 2533 PerFunctionState *PFS) { 2534 if (Ty->isFunctionTy()) 2535 return Error(ID.Loc, "functions are not values, refer to them as pointers"); 2536 2537 switch (ID.Kind) { 2538 default: llvm_unreachable("Unknown ValID!"); 2539 case ValID::t_LocalID: 2540 if (!PFS) return Error(ID.Loc, "invalid use of function-local name"); 2541 V = PFS->GetVal(ID.UIntVal, Ty, ID.Loc); 2542 return (V == 0); 2543 case ValID::t_LocalName: 2544 if (!PFS) return Error(ID.Loc, "invalid use of function-local name"); 2545 V = PFS->GetVal(ID.StrVal, Ty, ID.Loc); 2546 return (V == 0); 2547 case ValID::t_InlineAsm: { 2548 const PointerType *PTy = dyn_cast<PointerType>(Ty); 2549 const FunctionType *FTy = 2550 PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : 0; 2551 if (!FTy || !InlineAsm::Verify(FTy, ID.StrVal2)) 2552 return Error(ID.Loc, "invalid type for inline asm constraint string"); 2553 V = InlineAsm::get(FTy, ID.StrVal, ID.StrVal2, ID.UIntVal&1, ID.UIntVal>>1); 2554 return false; 2555 } 2556 case ValID::t_MDNode: 2557 if (!Ty->isMetadataTy()) 2558 return Error(ID.Loc, "metadata value must have metadata type"); 2559 V = ID.MDNodeVal; 2560 return false; 2561 case ValID::t_MDString: 2562 if (!Ty->isMetadataTy()) 2563 return Error(ID.Loc, "metadata value must have metadata type"); 2564 V = ID.MDStringVal; 2565 return false; 2566 case ValID::t_GlobalName: 2567 V = GetGlobalVal(ID.StrVal, Ty, ID.Loc); 2568 return V == 0; 2569 case ValID::t_GlobalID: 2570 V = GetGlobalVal(ID.UIntVal, Ty, ID.Loc); 2571 return V == 0; 2572 case ValID::t_APSInt: 2573 if (!Ty->isIntegerTy()) 2574 return Error(ID.Loc, "integer constant must have integer type"); 2575 ID.APSIntVal.extOrTrunc(Ty->getPrimitiveSizeInBits()); 2576 V = ConstantInt::get(Context, ID.APSIntVal); 2577 return false; 2578 case ValID::t_APFloat: 2579 if (!Ty->isFloatingPointTy() || 2580 !ConstantFP::isValueValidForType(Ty, ID.APFloatVal)) 2581 return Error(ID.Loc, "floating point constant invalid for type"); 2582 2583 // The lexer has no type info, so builds all float and double FP constants 2584 // as double. Fix this here. Long double does not need this. 2585 if (&ID.APFloatVal.getSemantics() == &APFloat::IEEEdouble && 2586 Ty->isFloatTy()) { 2587 bool Ignored; 2588 ID.APFloatVal.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, 2589 &Ignored); 2590 } 2591 V = ConstantFP::get(Context, ID.APFloatVal); 2592 2593 if (V->getType() != Ty) 2594 return Error(ID.Loc, "floating point constant does not have type '" + 2595 Ty->getDescription() + "'"); 2596 2597 return false; 2598 case ValID::t_Null: 2599 if (!Ty->isPointerTy()) 2600 return Error(ID.Loc, "null must be a pointer type"); 2601 V = ConstantPointerNull::get(cast<PointerType>(Ty)); 2602 return false; 2603 case ValID::t_Undef: 2604 // FIXME: LabelTy should not be a first-class type. 2605 if ((!Ty->isFirstClassType() || Ty->isLabelTy()) && 2606 !Ty->isOpaqueTy()) 2607 return Error(ID.Loc, "invalid type for undef constant"); 2608 V = UndefValue::get(Ty); 2609 return false; 2610 case ValID::t_EmptyArray: 2611 if (!Ty->isArrayTy() || cast<ArrayType>(Ty)->getNumElements() != 0) 2612 return Error(ID.Loc, "invalid empty array initializer"); 2613 V = UndefValue::get(Ty); 2614 return false; 2615 case ValID::t_Zero: 2616 // FIXME: LabelTy should not be a first-class type. 2617 if (!Ty->isFirstClassType() || Ty->isLabelTy()) 2618 return Error(ID.Loc, "invalid type for null constant"); 2619 V = Constant::getNullValue(Ty); 2620 return false; 2621 case ValID::t_Constant: 2622 if (ID.ConstantVal->getType() != Ty) 2623 return Error(ID.Loc, "constant expression type mismatch"); 2624 2625 V = ID.ConstantVal; 2626 return false; 2627 } 2628} 2629 2630bool LLParser::ParseValue(const Type *Ty, Value *&V, PerFunctionState &PFS) { 2631 V = 0; 2632 ValID ID; 2633 return ParseValID(ID, &PFS) || 2634 ConvertValIDToValue(Ty, ID, V, &PFS); 2635} 2636 2637bool LLParser::ParseTypeAndValue(Value *&V, PerFunctionState &PFS) { 2638 PATypeHolder T(Type::getVoidTy(Context)); 2639 return ParseType(T) || 2640 ParseValue(T, V, PFS); 2641} 2642 2643bool LLParser::ParseTypeAndBasicBlock(BasicBlock *&BB, LocTy &Loc, 2644 PerFunctionState &PFS) { 2645 Value *V; 2646 Loc = Lex.getLoc(); 2647 if (ParseTypeAndValue(V, PFS)) return true; 2648 if (!isa<BasicBlock>(V)) 2649 return Error(Loc, "expected a basic block"); 2650 BB = cast<BasicBlock>(V); 2651 return false; 2652} 2653 2654 2655/// FunctionHeader 2656/// ::= OptionalLinkage OptionalVisibility OptionalCallingConv OptRetAttrs 2657/// Type GlobalName '(' ArgList ')' OptFuncAttrs OptSection 2658/// OptionalAlign OptGC 2659bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) { 2660 // Parse the linkage. 2661 LocTy LinkageLoc = Lex.getLoc(); 2662 unsigned Linkage; 2663 2664 unsigned Visibility, RetAttrs; 2665 CallingConv::ID CC; 2666 PATypeHolder RetType(Type::getVoidTy(Context)); 2667 LocTy RetTypeLoc = Lex.getLoc(); 2668 if (ParseOptionalLinkage(Linkage) || 2669 ParseOptionalVisibility(Visibility) || 2670 ParseOptionalCallingConv(CC) || 2671 ParseOptionalAttrs(RetAttrs, 1) || 2672 ParseType(RetType, RetTypeLoc, true /*void allowed*/)) 2673 return true; 2674 2675 // Verify that the linkage is ok. 2676 switch ((GlobalValue::LinkageTypes)Linkage) { 2677 case GlobalValue::ExternalLinkage: 2678 break; // always ok. 2679 case GlobalValue::DLLImportLinkage: 2680 case GlobalValue::ExternalWeakLinkage: 2681 if (isDefine) 2682 return Error(LinkageLoc, "invalid linkage for function definition"); 2683 break; 2684 case GlobalValue::PrivateLinkage: 2685 case GlobalValue::LinkerPrivateLinkage: 2686 case GlobalValue::LinkerPrivateWeakLinkage: 2687 case GlobalValue::LinkerPrivateWeakDefAutoLinkage: 2688 case GlobalValue::InternalLinkage: 2689 case GlobalValue::AvailableExternallyLinkage: 2690 case GlobalValue::LinkOnceAnyLinkage: 2691 case GlobalValue::LinkOnceODRLinkage: 2692 case GlobalValue::WeakAnyLinkage: 2693 case GlobalValue::WeakODRLinkage: 2694 case GlobalValue::DLLExportLinkage: 2695 if (!isDefine) 2696 return Error(LinkageLoc, "invalid linkage for function declaration"); 2697 break; 2698 case GlobalValue::AppendingLinkage: 2699 case GlobalValue::CommonLinkage: 2700 return Error(LinkageLoc, "invalid function linkage type"); 2701 } 2702 2703 if (!FunctionType::isValidReturnType(RetType) || 2704 RetType->isOpaqueTy()) 2705 return Error(RetTypeLoc, "invalid function return type"); 2706 2707 LocTy NameLoc = Lex.getLoc(); 2708 2709 std::string FunctionName; 2710 if (Lex.getKind() == lltok::GlobalVar) { 2711 FunctionName = Lex.getStrVal(); 2712 } else if (Lex.getKind() == lltok::GlobalID) { // @42 is ok. 2713 unsigned NameID = Lex.getUIntVal(); 2714 2715 if (NameID != NumberedVals.size()) 2716 return TokError("function expected to be numbered '%" + 2717 utostr(NumberedVals.size()) + "'"); 2718 } else { 2719 return TokError("expected function name"); 2720 } 2721 2722 Lex.Lex(); 2723 2724 if (Lex.getKind() != lltok::lparen) 2725 return TokError("expected '(' in function argument list"); 2726 2727 std::vector<ArgInfo> ArgList; 2728 bool isVarArg; 2729 unsigned FuncAttrs; 2730 std::string Section; 2731 unsigned Alignment; 2732 std::string GC; 2733 2734 if (ParseArgumentList(ArgList, isVarArg, false) || 2735 ParseOptionalAttrs(FuncAttrs, 2) || 2736 (EatIfPresent(lltok::kw_section) && 2737 ParseStringConstant(Section)) || 2738 ParseOptionalAlignment(Alignment) || 2739 (EatIfPresent(lltok::kw_gc) && 2740 ParseStringConstant(GC))) 2741 return true; 2742 2743 // If the alignment was parsed as an attribute, move to the alignment field. 2744 if (FuncAttrs & Attribute::Alignment) { 2745 Alignment = Attribute::getAlignmentFromAttrs(FuncAttrs); 2746 FuncAttrs &= ~Attribute::Alignment; 2747 } 2748 2749 // Okay, if we got here, the function is syntactically valid. Convert types 2750 // and do semantic checks. 2751 std::vector<const Type*> ParamTypeList; 2752 SmallVector<AttributeWithIndex, 8> Attrs; 2753 // FIXME : In 3.0, stop accepting zext, sext and inreg as optional function 2754 // attributes. 2755 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 2756 if (FuncAttrs & ObsoleteFuncAttrs) { 2757 RetAttrs |= FuncAttrs & ObsoleteFuncAttrs; 2758 FuncAttrs &= ~ObsoleteFuncAttrs; 2759 } 2760 2761 if (RetAttrs != Attribute::None) 2762 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 2763 2764 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 2765 ParamTypeList.push_back(ArgList[i].Type); 2766 if (ArgList[i].Attrs != Attribute::None) 2767 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 2768 } 2769 2770 if (FuncAttrs != Attribute::None) 2771 Attrs.push_back(AttributeWithIndex::get(~0, FuncAttrs)); 2772 2773 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 2774 2775 if (PAL.paramHasAttr(1, Attribute::StructRet) && !RetType->isVoidTy()) 2776 return Error(RetTypeLoc, "functions with 'sret' argument must return void"); 2777 2778 const FunctionType *FT = 2779 FunctionType::get(RetType, ParamTypeList, isVarArg); 2780 const PointerType *PFT = PointerType::getUnqual(FT); 2781 2782 Fn = 0; 2783 if (!FunctionName.empty()) { 2784 // If this was a definition of a forward reference, remove the definition 2785 // from the forward reference table and fill in the forward ref. 2786 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator FRVI = 2787 ForwardRefVals.find(FunctionName); 2788 if (FRVI != ForwardRefVals.end()) { 2789 Fn = M->getFunction(FunctionName); 2790 if (Fn->getType() != PFT) 2791 return Error(FRVI->second.second, "invalid forward reference to " 2792 "function '" + FunctionName + "' with wrong type!"); 2793 2794 ForwardRefVals.erase(FRVI); 2795 } else if ((Fn = M->getFunction(FunctionName))) { 2796 // If this function already exists in the symbol table, then it is 2797 // multiply defined. We accept a few cases for old backwards compat. 2798 // FIXME: Remove this stuff for LLVM 3.0. 2799 if (Fn->getType() != PFT || Fn->getAttributes() != PAL || 2800 (!Fn->isDeclaration() && isDefine)) { 2801 // If the redefinition has different type or different attributes, 2802 // reject it. If both have bodies, reject it. 2803 return Error(NameLoc, "invalid redefinition of function '" + 2804 FunctionName + "'"); 2805 } else if (Fn->isDeclaration()) { 2806 // Make sure to strip off any argument names so we can't get conflicts. 2807 for (Function::arg_iterator AI = Fn->arg_begin(), AE = Fn->arg_end(); 2808 AI != AE; ++AI) 2809 AI->setName(""); 2810 } 2811 } else if (M->getNamedValue(FunctionName)) { 2812 return Error(NameLoc, "redefinition of function '@" + FunctionName + "'"); 2813 } 2814 2815 } else { 2816 // If this is a definition of a forward referenced function, make sure the 2817 // types agree. 2818 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator I 2819 = ForwardRefValIDs.find(NumberedVals.size()); 2820 if (I != ForwardRefValIDs.end()) { 2821 Fn = cast<Function>(I->second.first); 2822 if (Fn->getType() != PFT) 2823 return Error(NameLoc, "type of definition and forward reference of '@" + 2824 utostr(NumberedVals.size()) +"' disagree"); 2825 ForwardRefValIDs.erase(I); 2826 } 2827 } 2828 2829 if (Fn == 0) 2830 Fn = Function::Create(FT, GlobalValue::ExternalLinkage, FunctionName, M); 2831 else // Move the forward-reference to the correct spot in the module. 2832 M->getFunctionList().splice(M->end(), M->getFunctionList(), Fn); 2833 2834 if (FunctionName.empty()) 2835 NumberedVals.push_back(Fn); 2836 2837 Fn->setLinkage((GlobalValue::LinkageTypes)Linkage); 2838 Fn->setVisibility((GlobalValue::VisibilityTypes)Visibility); 2839 Fn->setCallingConv(CC); 2840 Fn->setAttributes(PAL); 2841 Fn->setAlignment(Alignment); 2842 Fn->setSection(Section); 2843 if (!GC.empty()) Fn->setGC(GC.c_str()); 2844 2845 // Add all of the arguments we parsed to the function. 2846 Function::arg_iterator ArgIt = Fn->arg_begin(); 2847 for (unsigned i = 0, e = ArgList.size(); i != e; ++i, ++ArgIt) { 2848 // If we run out of arguments in the Function prototype, exit early. 2849 // FIXME: REMOVE THIS IN LLVM 3.0, this is just for the mismatch case above. 2850 if (ArgIt == Fn->arg_end()) break; 2851 2852 // If the argument has a name, insert it into the argument symbol table. 2853 if (ArgList[i].Name.empty()) continue; 2854 2855 // Set the name, if it conflicted, it will be auto-renamed. 2856 ArgIt->setName(ArgList[i].Name); 2857 2858 if (ArgIt->getNameStr() != ArgList[i].Name) 2859 return Error(ArgList[i].Loc, "redefinition of argument '%" + 2860 ArgList[i].Name + "'"); 2861 } 2862 2863 return false; 2864} 2865 2866 2867/// ParseFunctionBody 2868/// ::= '{' BasicBlock+ '}' 2869/// ::= 'begin' BasicBlock+ 'end' // FIXME: remove in LLVM 3.0 2870/// 2871bool LLParser::ParseFunctionBody(Function &Fn) { 2872 if (Lex.getKind() != lltok::lbrace && Lex.getKind() != lltok::kw_begin) 2873 return TokError("expected '{' in function body"); 2874 Lex.Lex(); // eat the {. 2875 2876 int FunctionNumber = -1; 2877 if (!Fn.hasName()) FunctionNumber = NumberedVals.size()-1; 2878 2879 PerFunctionState PFS(*this, Fn, FunctionNumber); 2880 2881 // We need at least one basic block. 2882 if (Lex.getKind() == lltok::rbrace || Lex.getKind() == lltok::kw_end) 2883 return TokError("function body requires at least one basic block"); 2884 2885 while (Lex.getKind() != lltok::rbrace && Lex.getKind() != lltok::kw_end) 2886 if (ParseBasicBlock(PFS)) return true; 2887 2888 // Eat the }. 2889 Lex.Lex(); 2890 2891 // Verify function is ok. 2892 return PFS.FinishFunction(); 2893} 2894 2895/// ParseBasicBlock 2896/// ::= LabelStr? Instruction* 2897bool LLParser::ParseBasicBlock(PerFunctionState &PFS) { 2898 // If this basic block starts out with a name, remember it. 2899 std::string Name; 2900 LocTy NameLoc = Lex.getLoc(); 2901 if (Lex.getKind() == lltok::LabelStr) { 2902 Name = Lex.getStrVal(); 2903 Lex.Lex(); 2904 } 2905 2906 BasicBlock *BB = PFS.DefineBB(Name, NameLoc); 2907 if (BB == 0) return true; 2908 2909 std::string NameStr; 2910 2911 // Parse the instructions in this block until we get a terminator. 2912 Instruction *Inst; 2913 SmallVector<std::pair<unsigned, MDNode *>, 4> MetadataOnInst; 2914 do { 2915 // This instruction may have three possibilities for a name: a) none 2916 // specified, b) name specified "%foo =", c) number specified: "%4 =". 2917 LocTy NameLoc = Lex.getLoc(); 2918 int NameID = -1; 2919 NameStr = ""; 2920 2921 if (Lex.getKind() == lltok::LocalVarID) { 2922 NameID = Lex.getUIntVal(); 2923 Lex.Lex(); 2924 if (ParseToken(lltok::equal, "expected '=' after instruction id")) 2925 return true; 2926 } else if (Lex.getKind() == lltok::LocalVar || 2927 // FIXME: REMOVE IN LLVM 3.0 2928 Lex.getKind() == lltok::StringConstant) { 2929 NameStr = Lex.getStrVal(); 2930 Lex.Lex(); 2931 if (ParseToken(lltok::equal, "expected '=' after instruction name")) 2932 return true; 2933 } 2934 2935 switch (ParseInstruction(Inst, BB, PFS)) { 2936 default: assert(0 && "Unknown ParseInstruction result!"); 2937 case InstError: return true; 2938 case InstNormal: 2939 BB->getInstList().push_back(Inst); 2940 2941 // With a normal result, we check to see if the instruction is followed by 2942 // a comma and metadata. 2943 if (EatIfPresent(lltok::comma)) 2944 if (ParseInstructionMetadata(Inst, &PFS)) 2945 return true; 2946 break; 2947 case InstExtraComma: 2948 BB->getInstList().push_back(Inst); 2949 2950 // If the instruction parser ate an extra comma at the end of it, it 2951 // *must* be followed by metadata. 2952 if (ParseInstructionMetadata(Inst, &PFS)) 2953 return true; 2954 break; 2955 } 2956 2957 // Set the name on the instruction. 2958 if (PFS.SetInstName(NameID, NameStr, NameLoc, Inst)) return true; 2959 } while (!isa<TerminatorInst>(Inst)); 2960 2961 return false; 2962} 2963 2964//===----------------------------------------------------------------------===// 2965// Instruction Parsing. 2966//===----------------------------------------------------------------------===// 2967 2968/// ParseInstruction - Parse one of the many different instructions. 2969/// 2970int LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB, 2971 PerFunctionState &PFS) { 2972 lltok::Kind Token = Lex.getKind(); 2973 if (Token == lltok::Eof) 2974 return TokError("found end of file when expecting more instructions"); 2975 LocTy Loc = Lex.getLoc(); 2976 unsigned KeywordVal = Lex.getUIntVal(); 2977 Lex.Lex(); // Eat the keyword. 2978 2979 switch (Token) { 2980 default: return Error(Loc, "expected instruction opcode"); 2981 // Terminator Instructions. 2982 case lltok::kw_unwind: Inst = new UnwindInst(Context); return false; 2983 case lltok::kw_unreachable: Inst = new UnreachableInst(Context); return false; 2984 case lltok::kw_ret: return ParseRet(Inst, BB, PFS); 2985 case lltok::kw_br: return ParseBr(Inst, PFS); 2986 case lltok::kw_switch: return ParseSwitch(Inst, PFS); 2987 case lltok::kw_indirectbr: return ParseIndirectBr(Inst, PFS); 2988 case lltok::kw_invoke: return ParseInvoke(Inst, PFS); 2989 // Binary Operators. 2990 case lltok::kw_add: 2991 case lltok::kw_sub: 2992 case lltok::kw_mul: { 2993 bool NUW = false; 2994 bool NSW = false; 2995 LocTy ModifierLoc = Lex.getLoc(); 2996 if (EatIfPresent(lltok::kw_nuw)) 2997 NUW = true; 2998 if (EatIfPresent(lltok::kw_nsw)) { 2999 NSW = true; 3000 if (EatIfPresent(lltok::kw_nuw)) 3001 NUW = true; 3002 } 3003 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 1); 3004 if (!Result) { 3005 if (!Inst->getType()->isIntOrIntVectorTy()) { 3006 if (NUW) 3007 return Error(ModifierLoc, "nuw only applies to integer operations"); 3008 if (NSW) 3009 return Error(ModifierLoc, "nsw only applies to integer operations"); 3010 } 3011 if (NUW) 3012 cast<BinaryOperator>(Inst)->setHasNoUnsignedWrap(true); 3013 if (NSW) 3014 cast<BinaryOperator>(Inst)->setHasNoSignedWrap(true); 3015 } 3016 return Result; 3017 } 3018 case lltok::kw_fadd: 3019 case lltok::kw_fsub: 3020 case lltok::kw_fmul: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 3021 3022 case lltok::kw_sdiv: { 3023 bool Exact = false; 3024 if (EatIfPresent(lltok::kw_exact)) 3025 Exact = true; 3026 bool Result = ParseArithmetic(Inst, PFS, KeywordVal, 1); 3027 if (!Result) 3028 if (Exact) 3029 cast<BinaryOperator>(Inst)->setIsExact(true); 3030 return Result; 3031 } 3032 3033 case lltok::kw_udiv: 3034 case lltok::kw_urem: 3035 case lltok::kw_srem: return ParseArithmetic(Inst, PFS, KeywordVal, 1); 3036 case lltok::kw_fdiv: 3037 case lltok::kw_frem: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 3038 case lltok::kw_shl: 3039 case lltok::kw_lshr: 3040 case lltok::kw_ashr: 3041 case lltok::kw_and: 3042 case lltok::kw_or: 3043 case lltok::kw_xor: return ParseLogical(Inst, PFS, KeywordVal); 3044 case lltok::kw_icmp: 3045 case lltok::kw_fcmp: return ParseCompare(Inst, PFS, KeywordVal); 3046 // Casts. 3047 case lltok::kw_trunc: 3048 case lltok::kw_zext: 3049 case lltok::kw_sext: 3050 case lltok::kw_fptrunc: 3051 case lltok::kw_fpext: 3052 case lltok::kw_bitcast: 3053 case lltok::kw_uitofp: 3054 case lltok::kw_sitofp: 3055 case lltok::kw_fptoui: 3056 case lltok::kw_fptosi: 3057 case lltok::kw_inttoptr: 3058 case lltok::kw_ptrtoint: return ParseCast(Inst, PFS, KeywordVal); 3059 // Other. 3060 case lltok::kw_select: return ParseSelect(Inst, PFS); 3061 case lltok::kw_va_arg: return ParseVA_Arg(Inst, PFS); 3062 case lltok::kw_extractelement: return ParseExtractElement(Inst, PFS); 3063 case lltok::kw_insertelement: return ParseInsertElement(Inst, PFS); 3064 case lltok::kw_shufflevector: return ParseShuffleVector(Inst, PFS); 3065 case lltok::kw_phi: return ParsePHI(Inst, PFS); 3066 case lltok::kw_call: return ParseCall(Inst, PFS, false); 3067 case lltok::kw_tail: return ParseCall(Inst, PFS, true); 3068 // Memory. 3069 case lltok::kw_alloca: return ParseAlloc(Inst, PFS); 3070 case lltok::kw_malloc: return ParseAlloc(Inst, PFS, BB, false); 3071 case lltok::kw_free: return ParseFree(Inst, PFS, BB); 3072 case lltok::kw_load: return ParseLoad(Inst, PFS, false); 3073 case lltok::kw_store: return ParseStore(Inst, PFS, false); 3074 case lltok::kw_volatile: 3075 if (EatIfPresent(lltok::kw_load)) 3076 return ParseLoad(Inst, PFS, true); 3077 else if (EatIfPresent(lltok::kw_store)) 3078 return ParseStore(Inst, PFS, true); 3079 else 3080 return TokError("expected 'load' or 'store'"); 3081 case lltok::kw_getresult: return ParseGetResult(Inst, PFS); 3082 case lltok::kw_getelementptr: return ParseGetElementPtr(Inst, PFS); 3083 case lltok::kw_extractvalue: return ParseExtractValue(Inst, PFS); 3084 case lltok::kw_insertvalue: return ParseInsertValue(Inst, PFS); 3085 } 3086} 3087 3088/// ParseCmpPredicate - Parse an integer or fp predicate, based on Kind. 3089bool LLParser::ParseCmpPredicate(unsigned &P, unsigned Opc) { 3090 if (Opc == Instruction::FCmp) { 3091 switch (Lex.getKind()) { 3092 default: TokError("expected fcmp predicate (e.g. 'oeq')"); 3093 case lltok::kw_oeq: P = CmpInst::FCMP_OEQ; break; 3094 case lltok::kw_one: P = CmpInst::FCMP_ONE; break; 3095 case lltok::kw_olt: P = CmpInst::FCMP_OLT; break; 3096 case lltok::kw_ogt: P = CmpInst::FCMP_OGT; break; 3097 case lltok::kw_ole: P = CmpInst::FCMP_OLE; break; 3098 case lltok::kw_oge: P = CmpInst::FCMP_OGE; break; 3099 case lltok::kw_ord: P = CmpInst::FCMP_ORD; break; 3100 case lltok::kw_uno: P = CmpInst::FCMP_UNO; break; 3101 case lltok::kw_ueq: P = CmpInst::FCMP_UEQ; break; 3102 case lltok::kw_une: P = CmpInst::FCMP_UNE; break; 3103 case lltok::kw_ult: P = CmpInst::FCMP_ULT; break; 3104 case lltok::kw_ugt: P = CmpInst::FCMP_UGT; break; 3105 case lltok::kw_ule: P = CmpInst::FCMP_ULE; break; 3106 case lltok::kw_uge: P = CmpInst::FCMP_UGE; break; 3107 case lltok::kw_true: P = CmpInst::FCMP_TRUE; break; 3108 case lltok::kw_false: P = CmpInst::FCMP_FALSE; break; 3109 } 3110 } else { 3111 switch (Lex.getKind()) { 3112 default: TokError("expected icmp predicate (e.g. 'eq')"); 3113 case lltok::kw_eq: P = CmpInst::ICMP_EQ; break; 3114 case lltok::kw_ne: P = CmpInst::ICMP_NE; break; 3115 case lltok::kw_slt: P = CmpInst::ICMP_SLT; break; 3116 case lltok::kw_sgt: P = CmpInst::ICMP_SGT; break; 3117 case lltok::kw_sle: P = CmpInst::ICMP_SLE; break; 3118 case lltok::kw_sge: P = CmpInst::ICMP_SGE; break; 3119 case lltok::kw_ult: P = CmpInst::ICMP_ULT; break; 3120 case lltok::kw_ugt: P = CmpInst::ICMP_UGT; break; 3121 case lltok::kw_ule: P = CmpInst::ICMP_ULE; break; 3122 case lltok::kw_uge: P = CmpInst::ICMP_UGE; break; 3123 } 3124 } 3125 Lex.Lex(); 3126 return false; 3127} 3128 3129//===----------------------------------------------------------------------===// 3130// Terminator Instructions. 3131//===----------------------------------------------------------------------===// 3132 3133/// ParseRet - Parse a return instruction. 3134/// ::= 'ret' void (',' !dbg, !1)* 3135/// ::= 'ret' TypeAndValue (',' !dbg, !1)* 3136/// ::= 'ret' TypeAndValue (',' TypeAndValue)+ (',' !dbg, !1)* 3137/// [[obsolete: LLVM 3.0]] 3138int LLParser::ParseRet(Instruction *&Inst, BasicBlock *BB, 3139 PerFunctionState &PFS) { 3140 PATypeHolder Ty(Type::getVoidTy(Context)); 3141 if (ParseType(Ty, true /*void allowed*/)) return true; 3142 3143 if (Ty->isVoidTy()) { 3144 Inst = ReturnInst::Create(Context); 3145 return false; 3146 } 3147 3148 Value *RV; 3149 if (ParseValue(Ty, RV, PFS)) return true; 3150 3151 bool ExtraComma = false; 3152 if (EatIfPresent(lltok::comma)) { 3153 // Parse optional custom metadata, e.g. !dbg 3154 if (Lex.getKind() == lltok::MetadataVar) { 3155 ExtraComma = true; 3156 } else { 3157 // The normal case is one return value. 3158 // FIXME: LLVM 3.0 remove MRV support for 'ret i32 1, i32 2', requiring 3159 // use of 'ret {i32,i32} {i32 1, i32 2}' 3160 SmallVector<Value*, 8> RVs; 3161 RVs.push_back(RV); 3162 3163 do { 3164 // If optional custom metadata, e.g. !dbg is seen then this is the 3165 // end of MRV. 3166 if (Lex.getKind() == lltok::MetadataVar) 3167 break; 3168 if (ParseTypeAndValue(RV, PFS)) return true; 3169 RVs.push_back(RV); 3170 } while (EatIfPresent(lltok::comma)); 3171 3172 RV = UndefValue::get(PFS.getFunction().getReturnType()); 3173 for (unsigned i = 0, e = RVs.size(); i != e; ++i) { 3174 Instruction *I = InsertValueInst::Create(RV, RVs[i], i, "mrv"); 3175 BB->getInstList().push_back(I); 3176 RV = I; 3177 } 3178 } 3179 } 3180 3181 Inst = ReturnInst::Create(Context, RV); 3182 return ExtraComma ? InstExtraComma : InstNormal; 3183} 3184 3185 3186/// ParseBr 3187/// ::= 'br' TypeAndValue 3188/// ::= 'br' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3189bool LLParser::ParseBr(Instruction *&Inst, PerFunctionState &PFS) { 3190 LocTy Loc, Loc2; 3191 Value *Op0; 3192 BasicBlock *Op1, *Op2; 3193 if (ParseTypeAndValue(Op0, Loc, PFS)) return true; 3194 3195 if (BasicBlock *BB = dyn_cast<BasicBlock>(Op0)) { 3196 Inst = BranchInst::Create(BB); 3197 return false; 3198 } 3199 3200 if (Op0->getType() != Type::getInt1Ty(Context)) 3201 return Error(Loc, "branch condition must have 'i1' type"); 3202 3203 if (ParseToken(lltok::comma, "expected ',' after branch condition") || 3204 ParseTypeAndBasicBlock(Op1, Loc, PFS) || 3205 ParseToken(lltok::comma, "expected ',' after true destination") || 3206 ParseTypeAndBasicBlock(Op2, Loc2, PFS)) 3207 return true; 3208 3209 Inst = BranchInst::Create(Op1, Op2, Op0); 3210 return false; 3211} 3212 3213/// ParseSwitch 3214/// Instruction 3215/// ::= 'switch' TypeAndValue ',' TypeAndValue '[' JumpTable ']' 3216/// JumpTable 3217/// ::= (TypeAndValue ',' TypeAndValue)* 3218bool LLParser::ParseSwitch(Instruction *&Inst, PerFunctionState &PFS) { 3219 LocTy CondLoc, BBLoc; 3220 Value *Cond; 3221 BasicBlock *DefaultBB; 3222 if (ParseTypeAndValue(Cond, CondLoc, PFS) || 3223 ParseToken(lltok::comma, "expected ',' after switch condition") || 3224 ParseTypeAndBasicBlock(DefaultBB, BBLoc, PFS) || 3225 ParseToken(lltok::lsquare, "expected '[' with switch table")) 3226 return true; 3227 3228 if (!Cond->getType()->isIntegerTy()) 3229 return Error(CondLoc, "switch condition must have integer type"); 3230 3231 // Parse the jump table pairs. 3232 SmallPtrSet<Value*, 32> SeenCases; 3233 SmallVector<std::pair<ConstantInt*, BasicBlock*>, 32> Table; 3234 while (Lex.getKind() != lltok::rsquare) { 3235 Value *Constant; 3236 BasicBlock *DestBB; 3237 3238 if (ParseTypeAndValue(Constant, CondLoc, PFS) || 3239 ParseToken(lltok::comma, "expected ',' after case value") || 3240 ParseTypeAndBasicBlock(DestBB, PFS)) 3241 return true; 3242 3243 if (!SeenCases.insert(Constant)) 3244 return Error(CondLoc, "duplicate case value in switch"); 3245 if (!isa<ConstantInt>(Constant)) 3246 return Error(CondLoc, "case value is not a constant integer"); 3247 3248 Table.push_back(std::make_pair(cast<ConstantInt>(Constant), DestBB)); 3249 } 3250 3251 Lex.Lex(); // Eat the ']'. 3252 3253 SwitchInst *SI = SwitchInst::Create(Cond, DefaultBB, Table.size()); 3254 for (unsigned i = 0, e = Table.size(); i != e; ++i) 3255 SI->addCase(Table[i].first, Table[i].second); 3256 Inst = SI; 3257 return false; 3258} 3259 3260/// ParseIndirectBr 3261/// Instruction 3262/// ::= 'indirectbr' TypeAndValue ',' '[' LabelList ']' 3263bool LLParser::ParseIndirectBr(Instruction *&Inst, PerFunctionState &PFS) { 3264 LocTy AddrLoc; 3265 Value *Address; 3266 if (ParseTypeAndValue(Address, AddrLoc, PFS) || 3267 ParseToken(lltok::comma, "expected ',' after indirectbr address") || 3268 ParseToken(lltok::lsquare, "expected '[' with indirectbr")) 3269 return true; 3270 3271 if (!Address->getType()->isPointerTy()) 3272 return Error(AddrLoc, "indirectbr address must have pointer type"); 3273 3274 // Parse the destination list. 3275 SmallVector<BasicBlock*, 16> DestList; 3276 3277 if (Lex.getKind() != lltok::rsquare) { 3278 BasicBlock *DestBB; 3279 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3280 return true; 3281 DestList.push_back(DestBB); 3282 3283 while (EatIfPresent(lltok::comma)) { 3284 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3285 return true; 3286 DestList.push_back(DestBB); 3287 } 3288 } 3289 3290 if (ParseToken(lltok::rsquare, "expected ']' at end of block list")) 3291 return true; 3292 3293 IndirectBrInst *IBI = IndirectBrInst::Create(Address, DestList.size()); 3294 for (unsigned i = 0, e = DestList.size(); i != e; ++i) 3295 IBI->addDestination(DestList[i]); 3296 Inst = IBI; 3297 return false; 3298} 3299 3300 3301/// ParseInvoke 3302/// ::= 'invoke' OptionalCallingConv OptionalAttrs Type Value ParamList 3303/// OptionalAttrs 'to' TypeAndValue 'unwind' TypeAndValue 3304bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) { 3305 LocTy CallLoc = Lex.getLoc(); 3306 unsigned RetAttrs, FnAttrs; 3307 CallingConv::ID CC; 3308 PATypeHolder RetType(Type::getVoidTy(Context)); 3309 LocTy RetTypeLoc; 3310 ValID CalleeID; 3311 SmallVector<ParamInfo, 16> ArgList; 3312 3313 BasicBlock *NormalBB, *UnwindBB; 3314 if (ParseOptionalCallingConv(CC) || 3315 ParseOptionalAttrs(RetAttrs, 1) || 3316 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3317 ParseValID(CalleeID) || 3318 ParseParameterList(ArgList, PFS) || 3319 ParseOptionalAttrs(FnAttrs, 2) || 3320 ParseToken(lltok::kw_to, "expected 'to' in invoke") || 3321 ParseTypeAndBasicBlock(NormalBB, PFS) || 3322 ParseToken(lltok::kw_unwind, "expected 'unwind' in invoke") || 3323 ParseTypeAndBasicBlock(UnwindBB, PFS)) 3324 return true; 3325 3326 // If RetType is a non-function pointer type, then this is the short syntax 3327 // for the call, which means that RetType is just the return type. Infer the 3328 // rest of the function argument types from the arguments that are present. 3329 const PointerType *PFTy = 0; 3330 const FunctionType *Ty = 0; 3331 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3332 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3333 // Pull out the types of all of the arguments... 3334 std::vector<const Type*> ParamTypes; 3335 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3336 ParamTypes.push_back(ArgList[i].V->getType()); 3337 3338 if (!FunctionType::isValidReturnType(RetType)) 3339 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3340 3341 Ty = FunctionType::get(RetType, ParamTypes, false); 3342 PFTy = PointerType::getUnqual(Ty); 3343 } 3344 3345 // Look up the callee. 3346 Value *Callee; 3347 if (ConvertValIDToValue(PFTy, CalleeID, Callee, &PFS)) return true; 3348 3349 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 3350 // function attributes. 3351 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 3352 if (FnAttrs & ObsoleteFuncAttrs) { 3353 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 3354 FnAttrs &= ~ObsoleteFuncAttrs; 3355 } 3356 3357 // Set up the Attributes for the function. 3358 SmallVector<AttributeWithIndex, 8> Attrs; 3359 if (RetAttrs != Attribute::None) 3360 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3361 3362 SmallVector<Value*, 8> Args; 3363 3364 // Loop through FunctionType's arguments and ensure they are specified 3365 // correctly. Also, gather any parameter attributes. 3366 FunctionType::param_iterator I = Ty->param_begin(); 3367 FunctionType::param_iterator E = Ty->param_end(); 3368 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3369 const Type *ExpectedTy = 0; 3370 if (I != E) { 3371 ExpectedTy = *I++; 3372 } else if (!Ty->isVarArg()) { 3373 return Error(ArgList[i].Loc, "too many arguments specified"); 3374 } 3375 3376 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3377 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3378 ExpectedTy->getDescription() + "'"); 3379 Args.push_back(ArgList[i].V); 3380 if (ArgList[i].Attrs != Attribute::None) 3381 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3382 } 3383 3384 if (I != E) 3385 return Error(CallLoc, "not enough parameters specified for call"); 3386 3387 if (FnAttrs != Attribute::None) 3388 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3389 3390 // Finish off the Attributes and check them 3391 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3392 3393 InvokeInst *II = InvokeInst::Create(Callee, NormalBB, UnwindBB, 3394 Args.begin(), Args.end()); 3395 II->setCallingConv(CC); 3396 II->setAttributes(PAL); 3397 Inst = II; 3398 return false; 3399} 3400 3401 3402 3403//===----------------------------------------------------------------------===// 3404// Binary Operators. 3405//===----------------------------------------------------------------------===// 3406 3407/// ParseArithmetic 3408/// ::= ArithmeticOps TypeAndValue ',' Value 3409/// 3410/// If OperandType is 0, then any FP or integer operand is allowed. If it is 1, 3411/// then any integer operand is allowed, if it is 2, any fp operand is allowed. 3412bool LLParser::ParseArithmetic(Instruction *&Inst, PerFunctionState &PFS, 3413 unsigned Opc, unsigned OperandType) { 3414 LocTy Loc; Value *LHS, *RHS; 3415 if (ParseTypeAndValue(LHS, Loc, PFS) || 3416 ParseToken(lltok::comma, "expected ',' in arithmetic operation") || 3417 ParseValue(LHS->getType(), RHS, PFS)) 3418 return true; 3419 3420 bool Valid; 3421 switch (OperandType) { 3422 default: llvm_unreachable("Unknown operand type!"); 3423 case 0: // int or FP. 3424 Valid = LHS->getType()->isIntOrIntVectorTy() || 3425 LHS->getType()->isFPOrFPVectorTy(); 3426 break; 3427 case 1: Valid = LHS->getType()->isIntOrIntVectorTy(); break; 3428 case 2: Valid = LHS->getType()->isFPOrFPVectorTy(); break; 3429 } 3430 3431 if (!Valid) 3432 return Error(Loc, "invalid operand type for instruction"); 3433 3434 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3435 return false; 3436} 3437 3438/// ParseLogical 3439/// ::= ArithmeticOps TypeAndValue ',' Value { 3440bool LLParser::ParseLogical(Instruction *&Inst, PerFunctionState &PFS, 3441 unsigned Opc) { 3442 LocTy Loc; Value *LHS, *RHS; 3443 if (ParseTypeAndValue(LHS, Loc, PFS) || 3444 ParseToken(lltok::comma, "expected ',' in logical operation") || 3445 ParseValue(LHS->getType(), RHS, PFS)) 3446 return true; 3447 3448 if (!LHS->getType()->isIntOrIntVectorTy()) 3449 return Error(Loc,"instruction requires integer or integer vector operands"); 3450 3451 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3452 return false; 3453} 3454 3455 3456/// ParseCompare 3457/// ::= 'icmp' IPredicates TypeAndValue ',' Value 3458/// ::= 'fcmp' FPredicates TypeAndValue ',' Value 3459bool LLParser::ParseCompare(Instruction *&Inst, PerFunctionState &PFS, 3460 unsigned Opc) { 3461 // Parse the integer/fp comparison predicate. 3462 LocTy Loc; 3463 unsigned Pred; 3464 Value *LHS, *RHS; 3465 if (ParseCmpPredicate(Pred, Opc) || 3466 ParseTypeAndValue(LHS, Loc, PFS) || 3467 ParseToken(lltok::comma, "expected ',' after compare value") || 3468 ParseValue(LHS->getType(), RHS, PFS)) 3469 return true; 3470 3471 if (Opc == Instruction::FCmp) { 3472 if (!LHS->getType()->isFPOrFPVectorTy()) 3473 return Error(Loc, "fcmp requires floating point operands"); 3474 Inst = new FCmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3475 } else { 3476 assert(Opc == Instruction::ICmp && "Unknown opcode for CmpInst!"); 3477 if (!LHS->getType()->isIntOrIntVectorTy() && 3478 !LHS->getType()->isPointerTy()) 3479 return Error(Loc, "icmp requires integer operands"); 3480 Inst = new ICmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3481 } 3482 return false; 3483} 3484 3485//===----------------------------------------------------------------------===// 3486// Other Instructions. 3487//===----------------------------------------------------------------------===// 3488 3489 3490/// ParseCast 3491/// ::= CastOpc TypeAndValue 'to' Type 3492bool LLParser::ParseCast(Instruction *&Inst, PerFunctionState &PFS, 3493 unsigned Opc) { 3494 LocTy Loc; Value *Op; 3495 PATypeHolder DestTy(Type::getVoidTy(Context)); 3496 if (ParseTypeAndValue(Op, Loc, PFS) || 3497 ParseToken(lltok::kw_to, "expected 'to' after cast value") || 3498 ParseType(DestTy)) 3499 return true; 3500 3501 if (!CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy)) { 3502 CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy); 3503 return Error(Loc, "invalid cast opcode for cast from '" + 3504 Op->getType()->getDescription() + "' to '" + 3505 DestTy->getDescription() + "'"); 3506 } 3507 Inst = CastInst::Create((Instruction::CastOps)Opc, Op, DestTy); 3508 return false; 3509} 3510 3511/// ParseSelect 3512/// ::= 'select' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3513bool LLParser::ParseSelect(Instruction *&Inst, PerFunctionState &PFS) { 3514 LocTy Loc; 3515 Value *Op0, *Op1, *Op2; 3516 if (ParseTypeAndValue(Op0, Loc, PFS) || 3517 ParseToken(lltok::comma, "expected ',' after select condition") || 3518 ParseTypeAndValue(Op1, PFS) || 3519 ParseToken(lltok::comma, "expected ',' after select value") || 3520 ParseTypeAndValue(Op2, PFS)) 3521 return true; 3522 3523 if (const char *Reason = SelectInst::areInvalidOperands(Op0, Op1, Op2)) 3524 return Error(Loc, Reason); 3525 3526 Inst = SelectInst::Create(Op0, Op1, Op2); 3527 return false; 3528} 3529 3530/// ParseVA_Arg 3531/// ::= 'va_arg' TypeAndValue ',' Type 3532bool LLParser::ParseVA_Arg(Instruction *&Inst, PerFunctionState &PFS) { 3533 Value *Op; 3534 PATypeHolder EltTy(Type::getVoidTy(Context)); 3535 LocTy TypeLoc; 3536 if (ParseTypeAndValue(Op, PFS) || 3537 ParseToken(lltok::comma, "expected ',' after vaarg operand") || 3538 ParseType(EltTy, TypeLoc)) 3539 return true; 3540 3541 if (!EltTy->isFirstClassType()) 3542 return Error(TypeLoc, "va_arg requires operand with first class type"); 3543 3544 Inst = new VAArgInst(Op, EltTy); 3545 return false; 3546} 3547 3548/// ParseExtractElement 3549/// ::= 'extractelement' TypeAndValue ',' TypeAndValue 3550bool LLParser::ParseExtractElement(Instruction *&Inst, PerFunctionState &PFS) { 3551 LocTy Loc; 3552 Value *Op0, *Op1; 3553 if (ParseTypeAndValue(Op0, Loc, PFS) || 3554 ParseToken(lltok::comma, "expected ',' after extract value") || 3555 ParseTypeAndValue(Op1, PFS)) 3556 return true; 3557 3558 if (!ExtractElementInst::isValidOperands(Op0, Op1)) 3559 return Error(Loc, "invalid extractelement operands"); 3560 3561 Inst = ExtractElementInst::Create(Op0, Op1); 3562 return false; 3563} 3564 3565/// ParseInsertElement 3566/// ::= 'insertelement' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3567bool LLParser::ParseInsertElement(Instruction *&Inst, PerFunctionState &PFS) { 3568 LocTy Loc; 3569 Value *Op0, *Op1, *Op2; 3570 if (ParseTypeAndValue(Op0, Loc, PFS) || 3571 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3572 ParseTypeAndValue(Op1, PFS) || 3573 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3574 ParseTypeAndValue(Op2, PFS)) 3575 return true; 3576 3577 if (!InsertElementInst::isValidOperands(Op0, Op1, Op2)) 3578 return Error(Loc, "invalid insertelement operands"); 3579 3580 Inst = InsertElementInst::Create(Op0, Op1, Op2); 3581 return false; 3582} 3583 3584/// ParseShuffleVector 3585/// ::= 'shufflevector' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3586bool LLParser::ParseShuffleVector(Instruction *&Inst, PerFunctionState &PFS) { 3587 LocTy Loc; 3588 Value *Op0, *Op1, *Op2; 3589 if (ParseTypeAndValue(Op0, Loc, PFS) || 3590 ParseToken(lltok::comma, "expected ',' after shuffle mask") || 3591 ParseTypeAndValue(Op1, PFS) || 3592 ParseToken(lltok::comma, "expected ',' after shuffle value") || 3593 ParseTypeAndValue(Op2, PFS)) 3594 return true; 3595 3596 if (!ShuffleVectorInst::isValidOperands(Op0, Op1, Op2)) 3597 return Error(Loc, "invalid extractelement operands"); 3598 3599 Inst = new ShuffleVectorInst(Op0, Op1, Op2); 3600 return false; 3601} 3602 3603/// ParsePHI 3604/// ::= 'phi' Type '[' Value ',' Value ']' (',' '[' Value ',' Value ']')* 3605int LLParser::ParsePHI(Instruction *&Inst, PerFunctionState &PFS) { 3606 PATypeHolder Ty(Type::getVoidTy(Context)); 3607 Value *Op0, *Op1; 3608 LocTy TypeLoc = Lex.getLoc(); 3609 3610 if (ParseType(Ty) || 3611 ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3612 ParseValue(Ty, Op0, PFS) || 3613 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3614 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3615 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3616 return true; 3617 3618 bool AteExtraComma = false; 3619 SmallVector<std::pair<Value*, BasicBlock*>, 16> PHIVals; 3620 while (1) { 3621 PHIVals.push_back(std::make_pair(Op0, cast<BasicBlock>(Op1))); 3622 3623 if (!EatIfPresent(lltok::comma)) 3624 break; 3625 3626 if (Lex.getKind() == lltok::MetadataVar) { 3627 AteExtraComma = true; 3628 break; 3629 } 3630 3631 if (ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3632 ParseValue(Ty, Op0, PFS) || 3633 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3634 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3635 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3636 return true; 3637 } 3638 3639 if (!Ty->isFirstClassType()) 3640 return Error(TypeLoc, "phi node must have first class type"); 3641 3642 PHINode *PN = PHINode::Create(Ty); 3643 PN->reserveOperandSpace(PHIVals.size()); 3644 for (unsigned i = 0, e = PHIVals.size(); i != e; ++i) 3645 PN->addIncoming(PHIVals[i].first, PHIVals[i].second); 3646 Inst = PN; 3647 return AteExtraComma ? InstExtraComma : InstNormal; 3648} 3649 3650/// ParseCall 3651/// ::= 'tail'? 'call' OptionalCallingConv OptionalAttrs Type Value 3652/// ParameterList OptionalAttrs 3653bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS, 3654 bool isTail) { 3655 unsigned RetAttrs, FnAttrs; 3656 CallingConv::ID CC; 3657 PATypeHolder RetType(Type::getVoidTy(Context)); 3658 LocTy RetTypeLoc; 3659 ValID CalleeID; 3660 SmallVector<ParamInfo, 16> ArgList; 3661 LocTy CallLoc = Lex.getLoc(); 3662 3663 if ((isTail && ParseToken(lltok::kw_call, "expected 'tail call'")) || 3664 ParseOptionalCallingConv(CC) || 3665 ParseOptionalAttrs(RetAttrs, 1) || 3666 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3667 ParseValID(CalleeID) || 3668 ParseParameterList(ArgList, PFS) || 3669 ParseOptionalAttrs(FnAttrs, 2)) 3670 return true; 3671 3672 // If RetType is a non-function pointer type, then this is the short syntax 3673 // for the call, which means that RetType is just the return type. Infer the 3674 // rest of the function argument types from the arguments that are present. 3675 const PointerType *PFTy = 0; 3676 const FunctionType *Ty = 0; 3677 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3678 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3679 // Pull out the types of all of the arguments... 3680 std::vector<const Type*> ParamTypes; 3681 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3682 ParamTypes.push_back(ArgList[i].V->getType()); 3683 3684 if (!FunctionType::isValidReturnType(RetType)) 3685 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3686 3687 Ty = FunctionType::get(RetType, ParamTypes, false); 3688 PFTy = PointerType::getUnqual(Ty); 3689 } 3690 3691 // Look up the callee. 3692 Value *Callee; 3693 if (ConvertValIDToValue(PFTy, CalleeID, Callee, &PFS)) return true; 3694 3695 // FIXME: In LLVM 3.0, stop accepting zext, sext and inreg as optional 3696 // function attributes. 3697 unsigned ObsoleteFuncAttrs = Attribute::ZExt|Attribute::SExt|Attribute::InReg; 3698 if (FnAttrs & ObsoleteFuncAttrs) { 3699 RetAttrs |= FnAttrs & ObsoleteFuncAttrs; 3700 FnAttrs &= ~ObsoleteFuncAttrs; 3701 } 3702 3703 // Set up the Attributes for the function. 3704 SmallVector<AttributeWithIndex, 8> Attrs; 3705 if (RetAttrs != Attribute::None) 3706 Attrs.push_back(AttributeWithIndex::get(0, RetAttrs)); 3707 3708 SmallVector<Value*, 8> Args; 3709 3710 // Loop through FunctionType's arguments and ensure they are specified 3711 // correctly. Also, gather any parameter attributes. 3712 FunctionType::param_iterator I = Ty->param_begin(); 3713 FunctionType::param_iterator E = Ty->param_end(); 3714 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3715 const Type *ExpectedTy = 0; 3716 if (I != E) { 3717 ExpectedTy = *I++; 3718 } else if (!Ty->isVarArg()) { 3719 return Error(ArgList[i].Loc, "too many arguments specified"); 3720 } 3721 3722 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3723 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3724 ExpectedTy->getDescription() + "'"); 3725 Args.push_back(ArgList[i].V); 3726 if (ArgList[i].Attrs != Attribute::None) 3727 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3728 } 3729 3730 if (I != E) 3731 return Error(CallLoc, "not enough parameters specified for call"); 3732 3733 if (FnAttrs != Attribute::None) 3734 Attrs.push_back(AttributeWithIndex::get(~0, FnAttrs)); 3735 3736 // Finish off the Attributes and check them 3737 AttrListPtr PAL = AttrListPtr::get(Attrs.begin(), Attrs.end()); 3738 3739 CallInst *CI = CallInst::Create(Callee, Args.begin(), Args.end()); 3740 CI->setTailCall(isTail); 3741 CI->setCallingConv(CC); 3742 CI->setAttributes(PAL); 3743 Inst = CI; 3744 return false; 3745} 3746 3747//===----------------------------------------------------------------------===// 3748// Memory Instructions. 3749//===----------------------------------------------------------------------===// 3750 3751/// ParseAlloc 3752/// ::= 'malloc' Type (',' TypeAndValue)? (',' OptionalInfo)? 3753/// ::= 'alloca' Type (',' TypeAndValue)? (',' OptionalInfo)? 3754int LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS, 3755 BasicBlock* BB, bool isAlloca) { 3756 PATypeHolder Ty(Type::getVoidTy(Context)); 3757 Value *Size = 0; 3758 LocTy SizeLoc; 3759 unsigned Alignment = 0; 3760 if (ParseType(Ty)) return true; 3761 3762 bool AteExtraComma = false; 3763 if (EatIfPresent(lltok::comma)) { 3764 if (Lex.getKind() == lltok::kw_align) { 3765 if (ParseOptionalAlignment(Alignment)) return true; 3766 } else if (Lex.getKind() == lltok::MetadataVar) { 3767 AteExtraComma = true; 3768 } else { 3769 if (ParseTypeAndValue(Size, SizeLoc, PFS) || 3770 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3771 return true; 3772 } 3773 } 3774 3775 if (Size && !Size->getType()->isIntegerTy()) 3776 return Error(SizeLoc, "element count must have integer type"); 3777 3778 if (isAlloca) { 3779 Inst = new AllocaInst(Ty, Size, Alignment); 3780 return AteExtraComma ? InstExtraComma : InstNormal; 3781 } 3782 3783 // Autoupgrade old malloc instruction to malloc call. 3784 // FIXME: Remove in LLVM 3.0. 3785 if (Size && !Size->getType()->isIntegerTy(32)) 3786 return Error(SizeLoc, "element count must be i32"); 3787 const Type *IntPtrTy = Type::getInt32Ty(Context); 3788 Constant *AllocSize = ConstantExpr::getSizeOf(Ty); 3789 AllocSize = ConstantExpr::getTruncOrBitCast(AllocSize, IntPtrTy); 3790 if (!MallocF) 3791 // Prototype malloc as "void *(int32)". 3792 // This function is renamed as "malloc" in ValidateEndOfModule(). 3793 MallocF = cast<Function>( 3794 M->getOrInsertFunction("", Type::getInt8PtrTy(Context), IntPtrTy, NULL)); 3795 Inst = CallInst::CreateMalloc(BB, IntPtrTy, Ty, AllocSize, Size, MallocF); 3796return AteExtraComma ? InstExtraComma : InstNormal; 3797} 3798 3799/// ParseFree 3800/// ::= 'free' TypeAndValue 3801bool LLParser::ParseFree(Instruction *&Inst, PerFunctionState &PFS, 3802 BasicBlock* BB) { 3803 Value *Val; LocTy Loc; 3804 if (ParseTypeAndValue(Val, Loc, PFS)) return true; 3805 if (!Val->getType()->isPointerTy()) 3806 return Error(Loc, "operand to free must be a pointer"); 3807 Inst = CallInst::CreateFree(Val, BB); 3808 return false; 3809} 3810 3811/// ParseLoad 3812/// ::= 'volatile'? 'load' TypeAndValue (',' OptionalInfo)? 3813int LLParser::ParseLoad(Instruction *&Inst, PerFunctionState &PFS, 3814 bool isVolatile) { 3815 Value *Val; LocTy Loc; 3816 unsigned Alignment = 0; 3817 bool AteExtraComma = false; 3818 if (ParseTypeAndValue(Val, Loc, PFS) || 3819 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3820 return true; 3821 3822 if (!Val->getType()->isPointerTy() || 3823 !cast<PointerType>(Val->getType())->getElementType()->isFirstClassType()) 3824 return Error(Loc, "load operand must be a pointer to a first class type"); 3825 3826 Inst = new LoadInst(Val, "", isVolatile, Alignment); 3827 return AteExtraComma ? InstExtraComma : InstNormal; 3828} 3829 3830/// ParseStore 3831/// ::= 'volatile'? 'store' TypeAndValue ',' TypeAndValue (',' 'align' i32)? 3832int LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS, 3833 bool isVolatile) { 3834 Value *Val, *Ptr; LocTy Loc, PtrLoc; 3835 unsigned Alignment = 0; 3836 bool AteExtraComma = false; 3837 if (ParseTypeAndValue(Val, Loc, PFS) || 3838 ParseToken(lltok::comma, "expected ',' after store operand") || 3839 ParseTypeAndValue(Ptr, PtrLoc, PFS) || 3840 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3841 return true; 3842 3843 if (!Ptr->getType()->isPointerTy()) 3844 return Error(PtrLoc, "store operand must be a pointer"); 3845 if (!Val->getType()->isFirstClassType()) 3846 return Error(Loc, "store operand must be a first class value"); 3847 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType()) 3848 return Error(Loc, "stored value and pointer type do not match"); 3849 3850 Inst = new StoreInst(Val, Ptr, isVolatile, Alignment); 3851 return AteExtraComma ? InstExtraComma : InstNormal; 3852} 3853 3854/// ParseGetResult 3855/// ::= 'getresult' TypeAndValue ',' i32 3856/// FIXME: Remove support for getresult in LLVM 3.0 3857bool LLParser::ParseGetResult(Instruction *&Inst, PerFunctionState &PFS) { 3858 Value *Val; LocTy ValLoc, EltLoc; 3859 unsigned Element; 3860 if (ParseTypeAndValue(Val, ValLoc, PFS) || 3861 ParseToken(lltok::comma, "expected ',' after getresult operand") || 3862 ParseUInt32(Element, EltLoc)) 3863 return true; 3864 3865 if (!Val->getType()->isStructTy() && !Val->getType()->isArrayTy()) 3866 return Error(ValLoc, "getresult inst requires an aggregate operand"); 3867 if (!ExtractValueInst::getIndexedType(Val->getType(), Element)) 3868 return Error(EltLoc, "invalid getresult index for value"); 3869 Inst = ExtractValueInst::Create(Val, Element); 3870 return false; 3871} 3872 3873/// ParseGetElementPtr 3874/// ::= 'getelementptr' 'inbounds'? TypeAndValue (',' TypeAndValue)* 3875int LLParser::ParseGetElementPtr(Instruction *&Inst, PerFunctionState &PFS) { 3876 Value *Ptr, *Val; LocTy Loc, EltLoc; 3877 3878 bool InBounds = EatIfPresent(lltok::kw_inbounds); 3879 3880 if (ParseTypeAndValue(Ptr, Loc, PFS)) return true; 3881 3882 if (!Ptr->getType()->isPointerTy()) 3883 return Error(Loc, "base of getelementptr must be a pointer"); 3884 3885 SmallVector<Value*, 16> Indices; 3886 bool AteExtraComma = false; 3887 while (EatIfPresent(lltok::comma)) { 3888 if (Lex.getKind() == lltok::MetadataVar) { 3889 AteExtraComma = true; 3890 break; 3891 } 3892 if (ParseTypeAndValue(Val, EltLoc, PFS)) return true; 3893 if (!Val->getType()->isIntegerTy()) 3894 return Error(EltLoc, "getelementptr index must be an integer"); 3895 Indices.push_back(Val); 3896 } 3897 3898 if (!GetElementPtrInst::getIndexedType(Ptr->getType(), 3899 Indices.begin(), Indices.end())) 3900 return Error(Loc, "invalid getelementptr indices"); 3901 Inst = GetElementPtrInst::Create(Ptr, Indices.begin(), Indices.end()); 3902 if (InBounds) 3903 cast<GetElementPtrInst>(Inst)->setIsInBounds(true); 3904 return AteExtraComma ? InstExtraComma : InstNormal; 3905} 3906 3907/// ParseExtractValue 3908/// ::= 'extractvalue' TypeAndValue (',' uint32)+ 3909int LLParser::ParseExtractValue(Instruction *&Inst, PerFunctionState &PFS) { 3910 Value *Val; LocTy Loc; 3911 SmallVector<unsigned, 4> Indices; 3912 bool AteExtraComma; 3913 if (ParseTypeAndValue(Val, Loc, PFS) || 3914 ParseIndexList(Indices, AteExtraComma)) 3915 return true; 3916 3917 if (!Val->getType()->isAggregateType()) 3918 return Error(Loc, "extractvalue operand must be aggregate type"); 3919 3920 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices.begin(), 3921 Indices.end())) 3922 return Error(Loc, "invalid indices for extractvalue"); 3923 Inst = ExtractValueInst::Create(Val, Indices.begin(), Indices.end()); 3924 return AteExtraComma ? InstExtraComma : InstNormal; 3925} 3926 3927/// ParseInsertValue 3928/// ::= 'insertvalue' TypeAndValue ',' TypeAndValue (',' uint32)+ 3929int LLParser::ParseInsertValue(Instruction *&Inst, PerFunctionState &PFS) { 3930 Value *Val0, *Val1; LocTy Loc0, Loc1; 3931 SmallVector<unsigned, 4> Indices; 3932 bool AteExtraComma; 3933 if (ParseTypeAndValue(Val0, Loc0, PFS) || 3934 ParseToken(lltok::comma, "expected comma after insertvalue operand") || 3935 ParseTypeAndValue(Val1, Loc1, PFS) || 3936 ParseIndexList(Indices, AteExtraComma)) 3937 return true; 3938 3939 if (!Val0->getType()->isAggregateType()) 3940 return Error(Loc0, "insertvalue operand must be aggregate type"); 3941 3942 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices.begin(), 3943 Indices.end())) 3944 return Error(Loc0, "invalid indices for insertvalue"); 3945 Inst = InsertValueInst::Create(Val0, Val1, Indices.begin(), Indices.end()); 3946 return AteExtraComma ? InstExtraComma : InstNormal; 3947} 3948 3949//===----------------------------------------------------------------------===// 3950// Embedded metadata. 3951//===----------------------------------------------------------------------===// 3952 3953/// ParseMDNodeVector 3954/// ::= Element (',' Element)* 3955/// Element 3956/// ::= 'null' | TypeAndValue 3957bool LLParser::ParseMDNodeVector(SmallVectorImpl<Value*> &Elts, 3958 PerFunctionState *PFS) { 3959 // Check for an empty list. 3960 if (Lex.getKind() == lltok::rbrace) 3961 return false; 3962 3963 do { 3964 // Null is a special case since it is typeless. 3965 if (EatIfPresent(lltok::kw_null)) { 3966 Elts.push_back(0); 3967 continue; 3968 } 3969 3970 Value *V = 0; 3971 PATypeHolder Ty(Type::getVoidTy(Context)); 3972 ValID ID; 3973 if (ParseType(Ty) || ParseValID(ID, PFS) || 3974 ConvertValIDToValue(Ty, ID, V, PFS)) 3975 return true; 3976 3977 Elts.push_back(V); 3978 } while (EatIfPresent(lltok::comma)); 3979 3980 return false; 3981} 3982