LLParser.cpp revision 64ea275fe4e85f112ccfaf9c7b56fe64e11c771f
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/Support/ErrorHandling.h" 26#include "llvm/Support/raw_ostream.h" 27using namespace llvm; 28 29static std::string getTypeString(Type *T) { 30 std::string Result; 31 raw_string_ostream Tmp(Result); 32 Tmp << *T; 33 return Tmp.str(); 34} 35 36/// Run: module ::= toplevelentity* 37bool LLParser::Run() { 38 // Prime the lexer. 39 Lex.Lex(); 40 41 return ParseTopLevelEntities() || 42 ValidateEndOfModule(); 43} 44 45/// ValidateEndOfModule - Do final validity and sanity checks at the end of the 46/// module. 47bool LLParser::ValidateEndOfModule() { 48 // Handle any instruction metadata forward references. 49 if (!ForwardRefInstMetadata.empty()) { 50 for (DenseMap<Instruction*, std::vector<MDRef> >::iterator 51 I = ForwardRefInstMetadata.begin(), E = ForwardRefInstMetadata.end(); 52 I != E; ++I) { 53 Instruction *Inst = I->first; 54 const std::vector<MDRef> &MDList = I->second; 55 56 for (unsigned i = 0, e = MDList.size(); i != e; ++i) { 57 unsigned SlotNo = MDList[i].MDSlot; 58 59 if (SlotNo >= NumberedMetadata.size() || NumberedMetadata[SlotNo] == 0) 60 return Error(MDList[i].Loc, "use of undefined metadata '!" + 61 Twine(SlotNo) + "'"); 62 Inst->setMetadata(MDList[i].MDKind, NumberedMetadata[SlotNo]); 63 } 64 } 65 ForwardRefInstMetadata.clear(); 66 } 67 68 69 // If there are entries in ForwardRefBlockAddresses at this point, they are 70 // references after the function was defined. Resolve those now. 71 while (!ForwardRefBlockAddresses.empty()) { 72 // Okay, we are referencing an already-parsed function, resolve them now. 73 Function *TheFn = 0; 74 const ValID &Fn = ForwardRefBlockAddresses.begin()->first; 75 if (Fn.Kind == ValID::t_GlobalName) 76 TheFn = M->getFunction(Fn.StrVal); 77 else if (Fn.UIntVal < NumberedVals.size()) 78 TheFn = dyn_cast<Function>(NumberedVals[Fn.UIntVal]); 79 80 if (TheFn == 0) 81 return Error(Fn.Loc, "unknown function referenced by blockaddress"); 82 83 // Resolve all these references. 84 if (ResolveForwardRefBlockAddresses(TheFn, 85 ForwardRefBlockAddresses.begin()->second, 86 0)) 87 return true; 88 89 ForwardRefBlockAddresses.erase(ForwardRefBlockAddresses.begin()); 90 } 91 92 for (unsigned i = 0, e = NumberedTypes.size(); i != e; ++i) 93 if (NumberedTypes[i].second.isValid()) 94 return Error(NumberedTypes[i].second, 95 "use of undefined type '%" + Twine(i) + "'"); 96 97 for (StringMap<std::pair<Type*, LocTy> >::iterator I = 98 NamedTypes.begin(), E = NamedTypes.end(); I != E; ++I) 99 if (I->second.second.isValid()) 100 return Error(I->second.second, 101 "use of undefined type named '" + I->getKey() + "'"); 102 103 if (!ForwardRefVals.empty()) 104 return Error(ForwardRefVals.begin()->second.second, 105 "use of undefined value '@" + ForwardRefVals.begin()->first + 106 "'"); 107 108 if (!ForwardRefValIDs.empty()) 109 return Error(ForwardRefValIDs.begin()->second.second, 110 "use of undefined value '@" + 111 Twine(ForwardRefValIDs.begin()->first) + "'"); 112 113 if (!ForwardRefMDNodes.empty()) 114 return Error(ForwardRefMDNodes.begin()->second.second, 115 "use of undefined metadata '!" + 116 Twine(ForwardRefMDNodes.begin()->first) + "'"); 117 118 119 // Look for intrinsic functions and CallInst that need to be upgraded 120 for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ) 121 UpgradeCallsToIntrinsic(FI++); // must be post-increment, as we remove 122 123 return false; 124} 125 126bool LLParser::ResolveForwardRefBlockAddresses(Function *TheFn, 127 std::vector<std::pair<ValID, GlobalValue*> > &Refs, 128 PerFunctionState *PFS) { 129 // Loop over all the references, resolving them. 130 for (unsigned i = 0, e = Refs.size(); i != e; ++i) { 131 BasicBlock *Res; 132 if (PFS) { 133 if (Refs[i].first.Kind == ValID::t_LocalName) 134 Res = PFS->GetBB(Refs[i].first.StrVal, Refs[i].first.Loc); 135 else 136 Res = PFS->GetBB(Refs[i].first.UIntVal, Refs[i].first.Loc); 137 } else if (Refs[i].first.Kind == ValID::t_LocalID) { 138 return Error(Refs[i].first.Loc, 139 "cannot take address of numeric label after the function is defined"); 140 } else { 141 Res = dyn_cast_or_null<BasicBlock>( 142 TheFn->getValueSymbolTable().lookup(Refs[i].first.StrVal)); 143 } 144 145 if (Res == 0) 146 return Error(Refs[i].first.Loc, 147 "referenced value is not a basic block"); 148 149 // Get the BlockAddress for this and update references to use it. 150 BlockAddress *BA = BlockAddress::get(TheFn, Res); 151 Refs[i].second->replaceAllUsesWith(BA); 152 Refs[i].second->eraseFromParent(); 153 } 154 return false; 155} 156 157 158//===----------------------------------------------------------------------===// 159// Top-Level Entities 160//===----------------------------------------------------------------------===// 161 162bool LLParser::ParseTopLevelEntities() { 163 while (1) { 164 switch (Lex.getKind()) { 165 default: return TokError("expected top-level entity"); 166 case lltok::Eof: return false; 167 case lltok::kw_declare: if (ParseDeclare()) return true; break; 168 case lltok::kw_define: if (ParseDefine()) return true; break; 169 case lltok::kw_module: if (ParseModuleAsm()) return true; break; 170 case lltok::kw_target: if (ParseTargetDefinition()) return true; break; 171 case lltok::kw_deplibs: if (ParseDepLibs()) return true; break; 172 case lltok::LocalVarID: if (ParseUnnamedType()) return true; break; 173 case lltok::LocalVar: if (ParseNamedType()) return true; break; 174 case lltok::GlobalID: if (ParseUnnamedGlobal()) return true; break; 175 case lltok::GlobalVar: if (ParseNamedGlobal()) return true; break; 176 case lltok::exclaim: if (ParseStandaloneMetadata()) return true; break; 177 case lltok::MetadataVar: if (ParseNamedMetadata()) return true; break; 178 179 // The Global variable production with no name can have many different 180 // optional leading prefixes, the production is: 181 // GlobalVar ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 182 // OptionalAddrSpace OptionalUnNammedAddr 183 // ('constant'|'global') ... 184 case lltok::kw_private: // OptionalLinkage 185 case lltok::kw_linker_private: // OptionalLinkage 186 case lltok::kw_linker_private_weak: // OptionalLinkage 187 case lltok::kw_linker_private_weak_def_auto: // FIXME: backwards compat. 188 case lltok::kw_internal: // OptionalLinkage 189 case lltok::kw_weak: // OptionalLinkage 190 case lltok::kw_weak_odr: // OptionalLinkage 191 case lltok::kw_linkonce: // OptionalLinkage 192 case lltok::kw_linkonce_odr: // OptionalLinkage 193 case lltok::kw_linkonce_odr_auto_hide: // OptionalLinkage 194 case lltok::kw_appending: // OptionalLinkage 195 case lltok::kw_dllexport: // OptionalLinkage 196 case lltok::kw_common: // OptionalLinkage 197 case lltok::kw_dllimport: // OptionalLinkage 198 case lltok::kw_extern_weak: // OptionalLinkage 199 case lltok::kw_external: { // OptionalLinkage 200 unsigned Linkage, Visibility; 201 if (ParseOptionalLinkage(Linkage) || 202 ParseOptionalVisibility(Visibility) || 203 ParseGlobal("", SMLoc(), Linkage, true, Visibility)) 204 return true; 205 break; 206 } 207 case lltok::kw_default: // OptionalVisibility 208 case lltok::kw_hidden: // OptionalVisibility 209 case lltok::kw_protected: { // OptionalVisibility 210 unsigned Visibility; 211 if (ParseOptionalVisibility(Visibility) || 212 ParseGlobal("", SMLoc(), 0, false, Visibility)) 213 return true; 214 break; 215 } 216 217 case lltok::kw_thread_local: // OptionalThreadLocal 218 case lltok::kw_addrspace: // OptionalAddrSpace 219 case lltok::kw_constant: // GlobalType 220 case lltok::kw_global: // GlobalType 221 if (ParseGlobal("", SMLoc(), 0, false, 0)) return true; 222 break; 223 } 224 } 225} 226 227 228/// toplevelentity 229/// ::= 'module' 'asm' STRINGCONSTANT 230bool LLParser::ParseModuleAsm() { 231 assert(Lex.getKind() == lltok::kw_module); 232 Lex.Lex(); 233 234 std::string AsmStr; 235 if (ParseToken(lltok::kw_asm, "expected 'module asm'") || 236 ParseStringConstant(AsmStr)) return true; 237 238 M->appendModuleInlineAsm(AsmStr); 239 return false; 240} 241 242/// toplevelentity 243/// ::= 'target' 'triple' '=' STRINGCONSTANT 244/// ::= 'target' 'datalayout' '=' STRINGCONSTANT 245bool LLParser::ParseTargetDefinition() { 246 assert(Lex.getKind() == lltok::kw_target); 247 std::string Str; 248 switch (Lex.Lex()) { 249 default: return TokError("unknown target property"); 250 case lltok::kw_triple: 251 Lex.Lex(); 252 if (ParseToken(lltok::equal, "expected '=' after target triple") || 253 ParseStringConstant(Str)) 254 return true; 255 M->setTargetTriple(Str); 256 return false; 257 case lltok::kw_datalayout: 258 Lex.Lex(); 259 if (ParseToken(lltok::equal, "expected '=' after target datalayout") || 260 ParseStringConstant(Str)) 261 return true; 262 M->setDataLayout(Str); 263 return false; 264 } 265} 266 267/// toplevelentity 268/// ::= 'deplibs' '=' '[' ']' 269/// ::= 'deplibs' '=' '[' STRINGCONSTANT (',' STRINGCONSTANT)* ']' 270bool LLParser::ParseDepLibs() { 271 assert(Lex.getKind() == lltok::kw_deplibs); 272 Lex.Lex(); 273 if (ParseToken(lltok::equal, "expected '=' after deplibs") || 274 ParseToken(lltok::lsquare, "expected '=' after deplibs")) 275 return true; 276 277 if (EatIfPresent(lltok::rsquare)) 278 return false; 279 280 std::string Str; 281 if (ParseStringConstant(Str)) return true; 282 M->addLibrary(Str); 283 284 while (EatIfPresent(lltok::comma)) { 285 if (ParseStringConstant(Str)) return true; 286 M->addLibrary(Str); 287 } 288 289 return ParseToken(lltok::rsquare, "expected ']' at end of list"); 290} 291 292/// ParseUnnamedType: 293/// ::= LocalVarID '=' 'type' type 294bool LLParser::ParseUnnamedType() { 295 LocTy TypeLoc = Lex.getLoc(); 296 unsigned TypeID = Lex.getUIntVal(); 297 Lex.Lex(); // eat LocalVarID; 298 299 if (ParseToken(lltok::equal, "expected '=' after name") || 300 ParseToken(lltok::kw_type, "expected 'type' after '='")) 301 return true; 302 303 if (TypeID >= NumberedTypes.size()) 304 NumberedTypes.resize(TypeID+1); 305 306 Type *Result = 0; 307 if (ParseStructDefinition(TypeLoc, "", 308 NumberedTypes[TypeID], Result)) return true; 309 310 if (!isa<StructType>(Result)) { 311 std::pair<Type*, LocTy> &Entry = NumberedTypes[TypeID]; 312 if (Entry.first) 313 return Error(TypeLoc, "non-struct types may not be recursive"); 314 Entry.first = Result; 315 Entry.second = SMLoc(); 316 } 317 318 return false; 319} 320 321 322/// toplevelentity 323/// ::= LocalVar '=' 'type' type 324bool LLParser::ParseNamedType() { 325 std::string Name = Lex.getStrVal(); 326 LocTy NameLoc = Lex.getLoc(); 327 Lex.Lex(); // eat LocalVar. 328 329 if (ParseToken(lltok::equal, "expected '=' after name") || 330 ParseToken(lltok::kw_type, "expected 'type' after name")) 331 return true; 332 333 Type *Result = 0; 334 if (ParseStructDefinition(NameLoc, Name, 335 NamedTypes[Name], Result)) return true; 336 337 if (!isa<StructType>(Result)) { 338 std::pair<Type*, LocTy> &Entry = NamedTypes[Name]; 339 if (Entry.first) 340 return Error(NameLoc, "non-struct types may not be recursive"); 341 Entry.first = Result; 342 Entry.second = SMLoc(); 343 } 344 345 return false; 346} 347 348 349/// toplevelentity 350/// ::= 'declare' FunctionHeader 351bool LLParser::ParseDeclare() { 352 assert(Lex.getKind() == lltok::kw_declare); 353 Lex.Lex(); 354 355 Function *F; 356 return ParseFunctionHeader(F, false); 357} 358 359/// toplevelentity 360/// ::= 'define' FunctionHeader '{' ... 361bool LLParser::ParseDefine() { 362 assert(Lex.getKind() == lltok::kw_define); 363 Lex.Lex(); 364 365 Function *F; 366 return ParseFunctionHeader(F, true) || 367 ParseFunctionBody(*F); 368} 369 370/// ParseGlobalType 371/// ::= 'constant' 372/// ::= 'global' 373bool LLParser::ParseGlobalType(bool &IsConstant) { 374 if (Lex.getKind() == lltok::kw_constant) 375 IsConstant = true; 376 else if (Lex.getKind() == lltok::kw_global) 377 IsConstant = false; 378 else { 379 IsConstant = false; 380 return TokError("expected 'global' or 'constant'"); 381 } 382 Lex.Lex(); 383 return false; 384} 385 386/// ParseUnnamedGlobal: 387/// OptionalVisibility ALIAS ... 388/// OptionalLinkage OptionalVisibility ... -> global variable 389/// GlobalID '=' OptionalVisibility ALIAS ... 390/// GlobalID '=' OptionalLinkage OptionalVisibility ... -> global variable 391bool LLParser::ParseUnnamedGlobal() { 392 unsigned VarID = NumberedVals.size(); 393 std::string Name; 394 LocTy NameLoc = Lex.getLoc(); 395 396 // Handle the GlobalID form. 397 if (Lex.getKind() == lltok::GlobalID) { 398 if (Lex.getUIntVal() != VarID) 399 return Error(Lex.getLoc(), "variable expected to be numbered '%" + 400 Twine(VarID) + "'"); 401 Lex.Lex(); // eat GlobalID; 402 403 if (ParseToken(lltok::equal, "expected '=' after name")) 404 return true; 405 } 406 407 bool HasLinkage; 408 unsigned Linkage, Visibility; 409 if (ParseOptionalLinkage(Linkage, HasLinkage) || 410 ParseOptionalVisibility(Visibility)) 411 return true; 412 413 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 414 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 415 return ParseAlias(Name, NameLoc, Visibility); 416} 417 418/// ParseNamedGlobal: 419/// GlobalVar '=' OptionalVisibility ALIAS ... 420/// GlobalVar '=' OptionalLinkage OptionalVisibility ... -> global variable 421bool LLParser::ParseNamedGlobal() { 422 assert(Lex.getKind() == lltok::GlobalVar); 423 LocTy NameLoc = Lex.getLoc(); 424 std::string Name = Lex.getStrVal(); 425 Lex.Lex(); 426 427 bool HasLinkage; 428 unsigned Linkage, Visibility; 429 if (ParseToken(lltok::equal, "expected '=' in global variable") || 430 ParseOptionalLinkage(Linkage, HasLinkage) || 431 ParseOptionalVisibility(Visibility)) 432 return true; 433 434 if (HasLinkage || Lex.getKind() != lltok::kw_alias) 435 return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility); 436 return ParseAlias(Name, NameLoc, Visibility); 437} 438 439// MDString: 440// ::= '!' STRINGCONSTANT 441bool LLParser::ParseMDString(MDString *&Result) { 442 std::string Str; 443 if (ParseStringConstant(Str)) return true; 444 Result = MDString::get(Context, Str); 445 return false; 446} 447 448// MDNode: 449// ::= '!' MDNodeNumber 450// 451/// This version of ParseMDNodeID returns the slot number and null in the case 452/// of a forward reference. 453bool LLParser::ParseMDNodeID(MDNode *&Result, unsigned &SlotNo) { 454 // !{ ..., !42, ... } 455 if (ParseUInt32(SlotNo)) return true; 456 457 // Check existing MDNode. 458 if (SlotNo < NumberedMetadata.size() && NumberedMetadata[SlotNo] != 0) 459 Result = NumberedMetadata[SlotNo]; 460 else 461 Result = 0; 462 return false; 463} 464 465bool LLParser::ParseMDNodeID(MDNode *&Result) { 466 // !{ ..., !42, ... } 467 unsigned MID = 0; 468 if (ParseMDNodeID(Result, MID)) return true; 469 470 // If not a forward reference, just return it now. 471 if (Result) return false; 472 473 // Otherwise, create MDNode forward reference. 474 MDNode *FwdNode = MDNode::getTemporary(Context, ArrayRef<Value*>()); 475 ForwardRefMDNodes[MID] = std::make_pair(FwdNode, Lex.getLoc()); 476 477 if (NumberedMetadata.size() <= MID) 478 NumberedMetadata.resize(MID+1); 479 NumberedMetadata[MID] = FwdNode; 480 Result = FwdNode; 481 return false; 482} 483 484/// ParseNamedMetadata: 485/// !foo = !{ !1, !2 } 486bool LLParser::ParseNamedMetadata() { 487 assert(Lex.getKind() == lltok::MetadataVar); 488 std::string Name = Lex.getStrVal(); 489 Lex.Lex(); 490 491 if (ParseToken(lltok::equal, "expected '=' here") || 492 ParseToken(lltok::exclaim, "Expected '!' here") || 493 ParseToken(lltok::lbrace, "Expected '{' here")) 494 return true; 495 496 NamedMDNode *NMD = M->getOrInsertNamedMetadata(Name); 497 if (Lex.getKind() != lltok::rbrace) 498 do { 499 if (ParseToken(lltok::exclaim, "Expected '!' here")) 500 return true; 501 502 MDNode *N = 0; 503 if (ParseMDNodeID(N)) return true; 504 NMD->addOperand(N); 505 } while (EatIfPresent(lltok::comma)); 506 507 if (ParseToken(lltok::rbrace, "expected end of metadata node")) 508 return true; 509 510 return false; 511} 512 513/// ParseStandaloneMetadata: 514/// !42 = !{...} 515bool LLParser::ParseStandaloneMetadata() { 516 assert(Lex.getKind() == lltok::exclaim); 517 Lex.Lex(); 518 unsigned MetadataID = 0; 519 520 LocTy TyLoc; 521 Type *Ty = 0; 522 SmallVector<Value *, 16> Elts; 523 if (ParseUInt32(MetadataID) || 524 ParseToken(lltok::equal, "expected '=' here") || 525 ParseType(Ty, TyLoc) || 526 ParseToken(lltok::exclaim, "Expected '!' here") || 527 ParseToken(lltok::lbrace, "Expected '{' here") || 528 ParseMDNodeVector(Elts, NULL) || 529 ParseToken(lltok::rbrace, "expected end of metadata node")) 530 return true; 531 532 MDNode *Init = MDNode::get(Context, Elts); 533 534 // See if this was forward referenced, if so, handle it. 535 std::map<unsigned, std::pair<TrackingVH<MDNode>, LocTy> >::iterator 536 FI = ForwardRefMDNodes.find(MetadataID); 537 if (FI != ForwardRefMDNodes.end()) { 538 MDNode *Temp = FI->second.first; 539 Temp->replaceAllUsesWith(Init); 540 MDNode::deleteTemporary(Temp); 541 ForwardRefMDNodes.erase(FI); 542 543 assert(NumberedMetadata[MetadataID] == Init && "Tracking VH didn't work"); 544 } else { 545 if (MetadataID >= NumberedMetadata.size()) 546 NumberedMetadata.resize(MetadataID+1); 547 548 if (NumberedMetadata[MetadataID] != 0) 549 return TokError("Metadata id is already used"); 550 NumberedMetadata[MetadataID] = Init; 551 } 552 553 return false; 554} 555 556/// ParseAlias: 557/// ::= GlobalVar '=' OptionalVisibility 'alias' OptionalLinkage Aliasee 558/// Aliasee 559/// ::= TypeAndValue 560/// ::= 'bitcast' '(' TypeAndValue 'to' Type ')' 561/// ::= 'getelementptr' 'inbounds'? '(' ... ')' 562/// 563/// Everything through visibility has already been parsed. 564/// 565bool LLParser::ParseAlias(const std::string &Name, LocTy NameLoc, 566 unsigned Visibility) { 567 assert(Lex.getKind() == lltok::kw_alias); 568 Lex.Lex(); 569 unsigned Linkage; 570 LocTy LinkageLoc = Lex.getLoc(); 571 if (ParseOptionalLinkage(Linkage)) 572 return true; 573 574 if (Linkage != GlobalValue::ExternalLinkage && 575 Linkage != GlobalValue::WeakAnyLinkage && 576 Linkage != GlobalValue::WeakODRLinkage && 577 Linkage != GlobalValue::InternalLinkage && 578 Linkage != GlobalValue::PrivateLinkage && 579 Linkage != GlobalValue::LinkerPrivateLinkage && 580 Linkage != GlobalValue::LinkerPrivateWeakLinkage) 581 return Error(LinkageLoc, "invalid linkage type for alias"); 582 583 Constant *Aliasee; 584 LocTy AliaseeLoc = Lex.getLoc(); 585 if (Lex.getKind() != lltok::kw_bitcast && 586 Lex.getKind() != lltok::kw_getelementptr) { 587 if (ParseGlobalTypeAndValue(Aliasee)) return true; 588 } else { 589 // The bitcast dest type is not present, it is implied by the dest type. 590 ValID ID; 591 if (ParseValID(ID)) return true; 592 if (ID.Kind != ValID::t_Constant) 593 return Error(AliaseeLoc, "invalid aliasee"); 594 Aliasee = ID.ConstantVal; 595 } 596 597 if (!Aliasee->getType()->isPointerTy()) 598 return Error(AliaseeLoc, "alias must have pointer type"); 599 600 // Okay, create the alias but do not insert it into the module yet. 601 GlobalAlias* GA = new GlobalAlias(Aliasee->getType(), 602 (GlobalValue::LinkageTypes)Linkage, Name, 603 Aliasee); 604 GA->setVisibility((GlobalValue::VisibilityTypes)Visibility); 605 606 // See if this value already exists in the symbol table. If so, it is either 607 // a redefinition or a definition of a forward reference. 608 if (GlobalValue *Val = M->getNamedValue(Name)) { 609 // See if this was a redefinition. If so, there is no entry in 610 // ForwardRefVals. 611 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 612 I = ForwardRefVals.find(Name); 613 if (I == ForwardRefVals.end()) 614 return Error(NameLoc, "redefinition of global named '@" + Name + "'"); 615 616 // Otherwise, this was a definition of forward ref. Verify that types 617 // agree. 618 if (Val->getType() != GA->getType()) 619 return Error(NameLoc, 620 "forward reference and definition of alias have different types"); 621 622 // If they agree, just RAUW the old value with the alias and remove the 623 // forward ref info. 624 Val->replaceAllUsesWith(GA); 625 Val->eraseFromParent(); 626 ForwardRefVals.erase(I); 627 } 628 629 // Insert into the module, we know its name won't collide now. 630 M->getAliasList().push_back(GA); 631 assert(GA->getName() == Name && "Should not be a name conflict!"); 632 633 return false; 634} 635 636/// ParseGlobal 637/// ::= GlobalVar '=' OptionalLinkage OptionalVisibility OptionalThreadLocal 638/// OptionalAddrSpace OptionalUnNammedAddr GlobalType Type Const 639/// ::= OptionalLinkage OptionalVisibility OptionalThreadLocal 640/// OptionalAddrSpace OptionalUnNammedAddr GlobalType Type Const 641/// 642/// Everything through visibility has been parsed already. 643/// 644bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc, 645 unsigned Linkage, bool HasLinkage, 646 unsigned Visibility) { 647 unsigned AddrSpace; 648 bool IsConstant, UnnamedAddr; 649 GlobalVariable::ThreadLocalMode TLM; 650 LocTy UnnamedAddrLoc; 651 LocTy TyLoc; 652 653 Type *Ty = 0; 654 if (ParseOptionalThreadLocal(TLM) || 655 ParseOptionalAddrSpace(AddrSpace) || 656 ParseOptionalToken(lltok::kw_unnamed_addr, UnnamedAddr, 657 &UnnamedAddrLoc) || 658 ParseGlobalType(IsConstant) || 659 ParseType(Ty, TyLoc)) 660 return true; 661 662 // If the linkage is specified and is external, then no initializer is 663 // present. 664 Constant *Init = 0; 665 if (!HasLinkage || (Linkage != GlobalValue::DLLImportLinkage && 666 Linkage != GlobalValue::ExternalWeakLinkage && 667 Linkage != GlobalValue::ExternalLinkage)) { 668 if (ParseGlobalValue(Ty, Init)) 669 return true; 670 } 671 672 if (Ty->isFunctionTy() || Ty->isLabelTy()) 673 return Error(TyLoc, "invalid type for global variable"); 674 675 GlobalVariable *GV = 0; 676 677 // See if the global was forward referenced, if so, use the global. 678 if (!Name.empty()) { 679 if (GlobalValue *GVal = M->getNamedValue(Name)) { 680 if (!ForwardRefVals.erase(Name) || !isa<GlobalValue>(GVal)) 681 return Error(NameLoc, "redefinition of global '@" + Name + "'"); 682 GV = cast<GlobalVariable>(GVal); 683 } 684 } else { 685 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 686 I = ForwardRefValIDs.find(NumberedVals.size()); 687 if (I != ForwardRefValIDs.end()) { 688 GV = cast<GlobalVariable>(I->second.first); 689 ForwardRefValIDs.erase(I); 690 } 691 } 692 693 if (GV == 0) { 694 GV = new GlobalVariable(*M, Ty, false, GlobalValue::ExternalLinkage, 0, 695 Name, 0, GlobalVariable::NotThreadLocal, 696 AddrSpace); 697 } else { 698 if (GV->getType()->getElementType() != Ty) 699 return Error(TyLoc, 700 "forward reference and definition of global have different types"); 701 702 // Move the forward-reference to the correct spot in the module. 703 M->getGlobalList().splice(M->global_end(), M->getGlobalList(), GV); 704 } 705 706 if (Name.empty()) 707 NumberedVals.push_back(GV); 708 709 // Set the parsed properties on the global. 710 if (Init) 711 GV->setInitializer(Init); 712 GV->setConstant(IsConstant); 713 GV->setLinkage((GlobalValue::LinkageTypes)Linkage); 714 GV->setVisibility((GlobalValue::VisibilityTypes)Visibility); 715 GV->setThreadLocalMode(TLM); 716 GV->setUnnamedAddr(UnnamedAddr); 717 718 // Parse attributes on the global. 719 while (Lex.getKind() == lltok::comma) { 720 Lex.Lex(); 721 722 if (Lex.getKind() == lltok::kw_section) { 723 Lex.Lex(); 724 GV->setSection(Lex.getStrVal()); 725 if (ParseToken(lltok::StringConstant, "expected global section string")) 726 return true; 727 } else if (Lex.getKind() == lltok::kw_align) { 728 unsigned Alignment; 729 if (ParseOptionalAlignment(Alignment)) return true; 730 GV->setAlignment(Alignment); 731 } else { 732 TokError("unknown global variable property!"); 733 } 734 } 735 736 return false; 737} 738 739 740//===----------------------------------------------------------------------===// 741// GlobalValue Reference/Resolution Routines. 742//===----------------------------------------------------------------------===// 743 744/// GetGlobalVal - Get a value with the specified name or ID, creating a 745/// forward reference record if needed. This can return null if the value 746/// exists but does not have the right type. 747GlobalValue *LLParser::GetGlobalVal(const std::string &Name, Type *Ty, 748 LocTy Loc) { 749 PointerType *PTy = dyn_cast<PointerType>(Ty); 750 if (PTy == 0) { 751 Error(Loc, "global variable reference must have pointer type"); 752 return 0; 753 } 754 755 // Look this name up in the normal function symbol table. 756 GlobalValue *Val = 757 cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name)); 758 759 // If this is a forward reference for the value, see if we already created a 760 // forward ref record. 761 if (Val == 0) { 762 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator 763 I = ForwardRefVals.find(Name); 764 if (I != ForwardRefVals.end()) 765 Val = I->second.first; 766 } 767 768 // If we have the value in the symbol table or fwd-ref table, return it. 769 if (Val) { 770 if (Val->getType() == Ty) return Val; 771 Error(Loc, "'@" + Name + "' defined with type '" + 772 getTypeString(Val->getType()) + "'"); 773 return 0; 774 } 775 776 // Otherwise, create a new forward reference for this value and remember it. 777 GlobalValue *FwdVal; 778 if (FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) 779 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M); 780 else 781 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 782 GlobalValue::ExternalWeakLinkage, 0, Name); 783 784 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 785 return FwdVal; 786} 787 788GlobalValue *LLParser::GetGlobalVal(unsigned ID, Type *Ty, LocTy Loc) { 789 PointerType *PTy = dyn_cast<PointerType>(Ty); 790 if (PTy == 0) { 791 Error(Loc, "global variable reference must have pointer type"); 792 return 0; 793 } 794 795 GlobalValue *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 796 797 // If this is a forward reference for the value, see if we already created a 798 // forward ref record. 799 if (Val == 0) { 800 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator 801 I = ForwardRefValIDs.find(ID); 802 if (I != ForwardRefValIDs.end()) 803 Val = I->second.first; 804 } 805 806 // If we have the value in the symbol table or fwd-ref table, return it. 807 if (Val) { 808 if (Val->getType() == Ty) return Val; 809 Error(Loc, "'@" + Twine(ID) + "' defined with type '" + 810 getTypeString(Val->getType()) + "'"); 811 return 0; 812 } 813 814 // Otherwise, create a new forward reference for this value and remember it. 815 GlobalValue *FwdVal; 816 if (FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType())) 817 FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, "", M); 818 else 819 FwdVal = new GlobalVariable(*M, PTy->getElementType(), false, 820 GlobalValue::ExternalWeakLinkage, 0, ""); 821 822 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 823 return FwdVal; 824} 825 826 827//===----------------------------------------------------------------------===// 828// Helper Routines. 829//===----------------------------------------------------------------------===// 830 831/// ParseToken - If the current token has the specified kind, eat it and return 832/// success. Otherwise, emit the specified error and return failure. 833bool LLParser::ParseToken(lltok::Kind T, const char *ErrMsg) { 834 if (Lex.getKind() != T) 835 return TokError(ErrMsg); 836 Lex.Lex(); 837 return false; 838} 839 840/// ParseStringConstant 841/// ::= StringConstant 842bool LLParser::ParseStringConstant(std::string &Result) { 843 if (Lex.getKind() != lltok::StringConstant) 844 return TokError("expected string constant"); 845 Result = Lex.getStrVal(); 846 Lex.Lex(); 847 return false; 848} 849 850/// ParseUInt32 851/// ::= uint32 852bool LLParser::ParseUInt32(unsigned &Val) { 853 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned()) 854 return TokError("expected integer"); 855 uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(0xFFFFFFFFULL+1); 856 if (Val64 != unsigned(Val64)) 857 return TokError("expected 32-bit integer (too large)"); 858 Val = Val64; 859 Lex.Lex(); 860 return false; 861} 862 863/// ParseTLSModel 864/// := 'localdynamic' 865/// := 'initialexec' 866/// := 'localexec' 867bool LLParser::ParseTLSModel(GlobalVariable::ThreadLocalMode &TLM) { 868 switch (Lex.getKind()) { 869 default: 870 return TokError("expected localdynamic, initialexec or localexec"); 871 case lltok::kw_localdynamic: 872 TLM = GlobalVariable::LocalDynamicTLSModel; 873 break; 874 case lltok::kw_initialexec: 875 TLM = GlobalVariable::InitialExecTLSModel; 876 break; 877 case lltok::kw_localexec: 878 TLM = GlobalVariable::LocalExecTLSModel; 879 break; 880 } 881 882 Lex.Lex(); 883 return false; 884} 885 886/// ParseOptionalThreadLocal 887/// := /*empty*/ 888/// := 'thread_local' 889/// := 'thread_local' '(' tlsmodel ')' 890bool LLParser::ParseOptionalThreadLocal(GlobalVariable::ThreadLocalMode &TLM) { 891 TLM = GlobalVariable::NotThreadLocal; 892 if (!EatIfPresent(lltok::kw_thread_local)) 893 return false; 894 895 TLM = GlobalVariable::GeneralDynamicTLSModel; 896 if (Lex.getKind() == lltok::lparen) { 897 Lex.Lex(); 898 return ParseTLSModel(TLM) || 899 ParseToken(lltok::rparen, "expected ')' after thread local model"); 900 } 901 return false; 902} 903 904/// ParseOptionalAddrSpace 905/// := /*empty*/ 906/// := 'addrspace' '(' uint32 ')' 907bool LLParser::ParseOptionalAddrSpace(unsigned &AddrSpace) { 908 AddrSpace = 0; 909 if (!EatIfPresent(lltok::kw_addrspace)) 910 return false; 911 return ParseToken(lltok::lparen, "expected '(' in address space") || 912 ParseUInt32(AddrSpace) || 913 ParseToken(lltok::rparen, "expected ')' in address space"); 914} 915 916/// ParseOptionalAttrs - Parse a potentially empty attribute list. AttrKind 917/// indicates what kind of attribute list this is: 0: function arg, 1: result, 918/// 2: function attr. 919bool LLParser::ParseOptionalAttrs(Attributes::Builder &B, unsigned AttrKind) { 920 LocTy AttrLoc = Lex.getLoc(); 921 bool HaveError = false; 922 923 B.clear(); 924 925 while (1) { 926 lltok::Kind Token = Lex.getKind(); 927 switch (Token) { 928 default: // End of attributes. 929 return HaveError; 930 case lltok::kw_zeroext: B.addAttribute(Attributes::ZExt); break; 931 case lltok::kw_signext: B.addAttribute(Attributes::SExt); break; 932 case lltok::kw_inreg: B.addAttribute(Attributes::InReg); break; 933 case lltok::kw_sret: B.addAttribute(Attributes::StructRet); break; 934 case lltok::kw_noalias: B.addAttribute(Attributes::NoAlias); break; 935 case lltok::kw_nocapture: B.addAttribute(Attributes::NoCapture); break; 936 case lltok::kw_byval: B.addAttribute(Attributes::ByVal); break; 937 case lltok::kw_nest: B.addAttribute(Attributes::Nest); break; 938 939 case lltok::kw_noreturn: B.addAttribute(Attributes::NoReturn); break; 940 case lltok::kw_nounwind: B.addAttribute(Attributes::NoUnwind); break; 941 case lltok::kw_uwtable: B.addAttribute(Attributes::UWTable); break; 942 case lltok::kw_returns_twice: B.addAttribute(Attributes::ReturnsTwice); break; 943 case lltok::kw_noinline: B.addAttribute(Attributes::NoInline); break; 944 case lltok::kw_readnone: B.addAttribute(Attributes::ReadNone); break; 945 case lltok::kw_readonly: B.addAttribute(Attributes::ReadOnly); break; 946 case lltok::kw_inlinehint: B.addAttribute(Attributes::InlineHint); break; 947 case lltok::kw_alwaysinline: B.addAttribute(Attributes::AlwaysInline); break; 948 case lltok::kw_optsize: B.addAttribute(Attributes::OptimizeForSize); break; 949 case lltok::kw_ssp: B.addAttribute(Attributes::StackProtect); break; 950 case lltok::kw_sspreq: B.addAttribute(Attributes::StackProtectReq); break; 951 case lltok::kw_noredzone: B.addAttribute(Attributes::NoRedZone); break; 952 case lltok::kw_noimplicitfloat: B.addAttribute(Attributes::NoImplicitFloat); break; 953 case lltok::kw_naked: B.addAttribute(Attributes::Naked); break; 954 case lltok::kw_nonlazybind: B.addAttribute(Attributes::NonLazyBind); break; 955 case lltok::kw_address_safety: B.addAttribute(Attributes::AddressSafety); break; 956 957 case lltok::kw_alignstack: { 958 unsigned Alignment; 959 if (ParseOptionalStackAlignment(Alignment)) 960 return true; 961 B.addStackAlignmentAttr(Alignment); 962 continue; 963 } 964 965 case lltok::kw_align: { 966 unsigned Alignment; 967 if (ParseOptionalAlignment(Alignment)) 968 return true; 969 B.addAlignmentAttr(Alignment); 970 continue; 971 } 972 973 } 974 975 // Perform some error checking. 976 switch (Token) { 977 default: 978 if (AttrKind == 2) 979 HaveError |= Error(AttrLoc, "invalid use of attribute on a function"); 980 break; 981 case lltok::kw_align: 982 // As a hack, we allow "align 2" on functions as a synonym for 983 // "alignstack 2". 984 break; 985 986 // Parameter Only: 987 case lltok::kw_sret: 988 case lltok::kw_nocapture: 989 case lltok::kw_byval: 990 case lltok::kw_nest: 991 if (AttrKind != 0) 992 HaveError |= Error(AttrLoc, "invalid use of parameter-only attribute"); 993 break; 994 995 // Function Only: 996 case lltok::kw_noreturn: 997 case lltok::kw_nounwind: 998 case lltok::kw_readnone: 999 case lltok::kw_readonly: 1000 case lltok::kw_noinline: 1001 case lltok::kw_alwaysinline: 1002 case lltok::kw_optsize: 1003 case lltok::kw_ssp: 1004 case lltok::kw_sspreq: 1005 case lltok::kw_noredzone: 1006 case lltok::kw_noimplicitfloat: 1007 case lltok::kw_naked: 1008 case lltok::kw_inlinehint: 1009 case lltok::kw_alignstack: 1010 case lltok::kw_uwtable: 1011 case lltok::kw_nonlazybind: 1012 case lltok::kw_returns_twice: 1013 case lltok::kw_address_safety: 1014 if (AttrKind != 2) 1015 HaveError |= Error(AttrLoc, "invalid use of function-only attribute"); 1016 break; 1017 } 1018 1019 Lex.Lex(); 1020 } 1021} 1022 1023/// ParseOptionalLinkage 1024/// ::= /*empty*/ 1025/// ::= 'private' 1026/// ::= 'linker_private' 1027/// ::= 'linker_private_weak' 1028/// ::= 'internal' 1029/// ::= 'weak' 1030/// ::= 'weak_odr' 1031/// ::= 'linkonce' 1032/// ::= 'linkonce_odr' 1033/// ::= 'linkonce_odr_auto_hide' 1034/// ::= 'available_externally' 1035/// ::= 'appending' 1036/// ::= 'dllexport' 1037/// ::= 'common' 1038/// ::= 'dllimport' 1039/// ::= 'extern_weak' 1040/// ::= 'external' 1041bool LLParser::ParseOptionalLinkage(unsigned &Res, bool &HasLinkage) { 1042 HasLinkage = false; 1043 switch (Lex.getKind()) { 1044 default: Res=GlobalValue::ExternalLinkage; return false; 1045 case lltok::kw_private: Res = GlobalValue::PrivateLinkage; break; 1046 case lltok::kw_linker_private: Res = GlobalValue::LinkerPrivateLinkage; break; 1047 case lltok::kw_linker_private_weak: 1048 Res = GlobalValue::LinkerPrivateWeakLinkage; 1049 break; 1050 case lltok::kw_internal: Res = GlobalValue::InternalLinkage; break; 1051 case lltok::kw_weak: Res = GlobalValue::WeakAnyLinkage; break; 1052 case lltok::kw_weak_odr: Res = GlobalValue::WeakODRLinkage; break; 1053 case lltok::kw_linkonce: Res = GlobalValue::LinkOnceAnyLinkage; break; 1054 case lltok::kw_linkonce_odr: Res = GlobalValue::LinkOnceODRLinkage; break; 1055 case lltok::kw_linkonce_odr_auto_hide: 1056 case lltok::kw_linker_private_weak_def_auto: // FIXME: For backwards compat. 1057 Res = GlobalValue::LinkOnceODRAutoHideLinkage; 1058 break; 1059 case lltok::kw_available_externally: 1060 Res = GlobalValue::AvailableExternallyLinkage; 1061 break; 1062 case lltok::kw_appending: Res = GlobalValue::AppendingLinkage; break; 1063 case lltok::kw_dllexport: Res = GlobalValue::DLLExportLinkage; break; 1064 case lltok::kw_common: Res = GlobalValue::CommonLinkage; break; 1065 case lltok::kw_dllimport: Res = GlobalValue::DLLImportLinkage; break; 1066 case lltok::kw_extern_weak: Res = GlobalValue::ExternalWeakLinkage; break; 1067 case lltok::kw_external: Res = GlobalValue::ExternalLinkage; break; 1068 } 1069 Lex.Lex(); 1070 HasLinkage = true; 1071 return false; 1072} 1073 1074/// ParseOptionalVisibility 1075/// ::= /*empty*/ 1076/// ::= 'default' 1077/// ::= 'hidden' 1078/// ::= 'protected' 1079/// 1080bool LLParser::ParseOptionalVisibility(unsigned &Res) { 1081 switch (Lex.getKind()) { 1082 default: Res = GlobalValue::DefaultVisibility; return false; 1083 case lltok::kw_default: Res = GlobalValue::DefaultVisibility; break; 1084 case lltok::kw_hidden: Res = GlobalValue::HiddenVisibility; break; 1085 case lltok::kw_protected: Res = GlobalValue::ProtectedVisibility; break; 1086 } 1087 Lex.Lex(); 1088 return false; 1089} 1090 1091/// ParseOptionalCallingConv 1092/// ::= /*empty*/ 1093/// ::= 'ccc' 1094/// ::= 'fastcc' 1095/// ::= 'coldcc' 1096/// ::= 'x86_stdcallcc' 1097/// ::= 'x86_fastcallcc' 1098/// ::= 'x86_thiscallcc' 1099/// ::= 'arm_apcscc' 1100/// ::= 'arm_aapcscc' 1101/// ::= 'arm_aapcs_vfpcc' 1102/// ::= 'msp430_intrcc' 1103/// ::= 'ptx_kernel' 1104/// ::= 'ptx_device' 1105/// ::= 'spir_func' 1106/// ::= 'spir_kernel' 1107/// ::= 'cc' UINT 1108/// 1109bool LLParser::ParseOptionalCallingConv(CallingConv::ID &CC) { 1110 switch (Lex.getKind()) { 1111 default: CC = CallingConv::C; return false; 1112 case lltok::kw_ccc: CC = CallingConv::C; break; 1113 case lltok::kw_fastcc: CC = CallingConv::Fast; break; 1114 case lltok::kw_coldcc: CC = CallingConv::Cold; break; 1115 case lltok::kw_x86_stdcallcc: CC = CallingConv::X86_StdCall; break; 1116 case lltok::kw_x86_fastcallcc: CC = CallingConv::X86_FastCall; break; 1117 case lltok::kw_x86_thiscallcc: CC = CallingConv::X86_ThisCall; break; 1118 case lltok::kw_arm_apcscc: CC = CallingConv::ARM_APCS; break; 1119 case lltok::kw_arm_aapcscc: CC = CallingConv::ARM_AAPCS; break; 1120 case lltok::kw_arm_aapcs_vfpcc:CC = CallingConv::ARM_AAPCS_VFP; break; 1121 case lltok::kw_msp430_intrcc: CC = CallingConv::MSP430_INTR; break; 1122 case lltok::kw_ptx_kernel: CC = CallingConv::PTX_Kernel; break; 1123 case lltok::kw_ptx_device: CC = CallingConv::PTX_Device; break; 1124 case lltok::kw_spir_kernel: CC = CallingConv::SPIR_KERNEL; break; 1125 case lltok::kw_spir_func: CC = CallingConv::SPIR_FUNC; break; 1126 case lltok::kw_cc: { 1127 unsigned ArbitraryCC; 1128 Lex.Lex(); 1129 if (ParseUInt32(ArbitraryCC)) 1130 return true; 1131 CC = static_cast<CallingConv::ID>(ArbitraryCC); 1132 return false; 1133 } 1134 } 1135 1136 Lex.Lex(); 1137 return false; 1138} 1139 1140/// ParseInstructionMetadata 1141/// ::= !dbg !42 (',' !dbg !57)* 1142bool LLParser::ParseInstructionMetadata(Instruction *Inst, 1143 PerFunctionState *PFS) { 1144 do { 1145 if (Lex.getKind() != lltok::MetadataVar) 1146 return TokError("expected metadata after comma"); 1147 1148 std::string Name = Lex.getStrVal(); 1149 unsigned MDK = M->getMDKindID(Name); 1150 Lex.Lex(); 1151 1152 MDNode *Node; 1153 SMLoc Loc = Lex.getLoc(); 1154 1155 if (ParseToken(lltok::exclaim, "expected '!' here")) 1156 return true; 1157 1158 // This code is similar to that of ParseMetadataValue, however it needs to 1159 // have special-case code for a forward reference; see the comments on 1160 // ForwardRefInstMetadata for details. Also, MDStrings are not supported 1161 // at the top level here. 1162 if (Lex.getKind() == lltok::lbrace) { 1163 ValID ID; 1164 if (ParseMetadataListValue(ID, PFS)) 1165 return true; 1166 assert(ID.Kind == ValID::t_MDNode); 1167 Inst->setMetadata(MDK, ID.MDNodeVal); 1168 } else { 1169 unsigned NodeID = 0; 1170 if (ParseMDNodeID(Node, NodeID)) 1171 return true; 1172 if (Node) { 1173 // If we got the node, add it to the instruction. 1174 Inst->setMetadata(MDK, Node); 1175 } else { 1176 MDRef R = { Loc, MDK, NodeID }; 1177 // Otherwise, remember that this should be resolved later. 1178 ForwardRefInstMetadata[Inst].push_back(R); 1179 } 1180 } 1181 1182 // If this is the end of the list, we're done. 1183 } while (EatIfPresent(lltok::comma)); 1184 return false; 1185} 1186 1187/// ParseOptionalAlignment 1188/// ::= /* empty */ 1189/// ::= 'align' 4 1190bool LLParser::ParseOptionalAlignment(unsigned &Alignment) { 1191 Alignment = 0; 1192 if (!EatIfPresent(lltok::kw_align)) 1193 return false; 1194 LocTy AlignLoc = Lex.getLoc(); 1195 if (ParseUInt32(Alignment)) return true; 1196 if (!isPowerOf2_32(Alignment)) 1197 return Error(AlignLoc, "alignment is not a power of two"); 1198 if (Alignment > Value::MaximumAlignment) 1199 return Error(AlignLoc, "huge alignments are not supported yet"); 1200 return false; 1201} 1202 1203/// ParseOptionalCommaAlign 1204/// ::= 1205/// ::= ',' align 4 1206/// 1207/// This returns with AteExtraComma set to true if it ate an excess comma at the 1208/// end. 1209bool LLParser::ParseOptionalCommaAlign(unsigned &Alignment, 1210 bool &AteExtraComma) { 1211 AteExtraComma = false; 1212 while (EatIfPresent(lltok::comma)) { 1213 // Metadata at the end is an early exit. 1214 if (Lex.getKind() == lltok::MetadataVar) { 1215 AteExtraComma = true; 1216 return false; 1217 } 1218 1219 if (Lex.getKind() != lltok::kw_align) 1220 return Error(Lex.getLoc(), "expected metadata or 'align'"); 1221 1222 if (ParseOptionalAlignment(Alignment)) return true; 1223 } 1224 1225 return false; 1226} 1227 1228/// ParseScopeAndOrdering 1229/// if isAtomic: ::= 'singlethread'? AtomicOrdering 1230/// else: ::= 1231/// 1232/// This sets Scope and Ordering to the parsed values. 1233bool LLParser::ParseScopeAndOrdering(bool isAtomic, SynchronizationScope &Scope, 1234 AtomicOrdering &Ordering) { 1235 if (!isAtomic) 1236 return false; 1237 1238 Scope = CrossThread; 1239 if (EatIfPresent(lltok::kw_singlethread)) 1240 Scope = SingleThread; 1241 switch (Lex.getKind()) { 1242 default: return TokError("Expected ordering on atomic instruction"); 1243 case lltok::kw_unordered: Ordering = Unordered; break; 1244 case lltok::kw_monotonic: Ordering = Monotonic; break; 1245 case lltok::kw_acquire: Ordering = Acquire; break; 1246 case lltok::kw_release: Ordering = Release; break; 1247 case lltok::kw_acq_rel: Ordering = AcquireRelease; break; 1248 case lltok::kw_seq_cst: Ordering = SequentiallyConsistent; break; 1249 } 1250 Lex.Lex(); 1251 return false; 1252} 1253 1254/// ParseOptionalStackAlignment 1255/// ::= /* empty */ 1256/// ::= 'alignstack' '(' 4 ')' 1257bool LLParser::ParseOptionalStackAlignment(unsigned &Alignment) { 1258 Alignment = 0; 1259 if (!EatIfPresent(lltok::kw_alignstack)) 1260 return false; 1261 LocTy ParenLoc = Lex.getLoc(); 1262 if (!EatIfPresent(lltok::lparen)) 1263 return Error(ParenLoc, "expected '('"); 1264 LocTy AlignLoc = Lex.getLoc(); 1265 if (ParseUInt32(Alignment)) return true; 1266 ParenLoc = Lex.getLoc(); 1267 if (!EatIfPresent(lltok::rparen)) 1268 return Error(ParenLoc, "expected ')'"); 1269 if (!isPowerOf2_32(Alignment)) 1270 return Error(AlignLoc, "stack alignment is not a power of two"); 1271 return false; 1272} 1273 1274/// ParseIndexList - This parses the index list for an insert/extractvalue 1275/// instruction. This sets AteExtraComma in the case where we eat an extra 1276/// comma at the end of the line and find that it is followed by metadata. 1277/// Clients that don't allow metadata can call the version of this function that 1278/// only takes one argument. 1279/// 1280/// ParseIndexList 1281/// ::= (',' uint32)+ 1282/// 1283bool LLParser::ParseIndexList(SmallVectorImpl<unsigned> &Indices, 1284 bool &AteExtraComma) { 1285 AteExtraComma = false; 1286 1287 if (Lex.getKind() != lltok::comma) 1288 return TokError("expected ',' as start of index list"); 1289 1290 while (EatIfPresent(lltok::comma)) { 1291 if (Lex.getKind() == lltok::MetadataVar) { 1292 AteExtraComma = true; 1293 return false; 1294 } 1295 unsigned Idx = 0; 1296 if (ParseUInt32(Idx)) return true; 1297 Indices.push_back(Idx); 1298 } 1299 1300 return false; 1301} 1302 1303//===----------------------------------------------------------------------===// 1304// Type Parsing. 1305//===----------------------------------------------------------------------===// 1306 1307/// ParseType - Parse a type. 1308bool LLParser::ParseType(Type *&Result, bool AllowVoid) { 1309 SMLoc TypeLoc = Lex.getLoc(); 1310 switch (Lex.getKind()) { 1311 default: 1312 return TokError("expected type"); 1313 case lltok::Type: 1314 // Type ::= 'float' | 'void' (etc) 1315 Result = Lex.getTyVal(); 1316 Lex.Lex(); 1317 break; 1318 case lltok::lbrace: 1319 // Type ::= StructType 1320 if (ParseAnonStructType(Result, false)) 1321 return true; 1322 break; 1323 case lltok::lsquare: 1324 // Type ::= '[' ... ']' 1325 Lex.Lex(); // eat the lsquare. 1326 if (ParseArrayVectorType(Result, false)) 1327 return true; 1328 break; 1329 case lltok::less: // Either vector or packed struct. 1330 // Type ::= '<' ... '>' 1331 Lex.Lex(); 1332 if (Lex.getKind() == lltok::lbrace) { 1333 if (ParseAnonStructType(Result, true) || 1334 ParseToken(lltok::greater, "expected '>' at end of packed struct")) 1335 return true; 1336 } else if (ParseArrayVectorType(Result, true)) 1337 return true; 1338 break; 1339 case lltok::LocalVar: { 1340 // Type ::= %foo 1341 std::pair<Type*, LocTy> &Entry = NamedTypes[Lex.getStrVal()]; 1342 1343 // If the type hasn't been defined yet, create a forward definition and 1344 // remember where that forward def'n was seen (in case it never is defined). 1345 if (Entry.first == 0) { 1346 Entry.first = StructType::create(Context, Lex.getStrVal()); 1347 Entry.second = Lex.getLoc(); 1348 } 1349 Result = Entry.first; 1350 Lex.Lex(); 1351 break; 1352 } 1353 1354 case lltok::LocalVarID: { 1355 // Type ::= %4 1356 if (Lex.getUIntVal() >= NumberedTypes.size()) 1357 NumberedTypes.resize(Lex.getUIntVal()+1); 1358 std::pair<Type*, LocTy> &Entry = NumberedTypes[Lex.getUIntVal()]; 1359 1360 // If the type hasn't been defined yet, create a forward definition and 1361 // remember where that forward def'n was seen (in case it never is defined). 1362 if (Entry.first == 0) { 1363 Entry.first = StructType::create(Context); 1364 Entry.second = Lex.getLoc(); 1365 } 1366 Result = Entry.first; 1367 Lex.Lex(); 1368 break; 1369 } 1370 } 1371 1372 // Parse the type suffixes. 1373 while (1) { 1374 switch (Lex.getKind()) { 1375 // End of type. 1376 default: 1377 if (!AllowVoid && Result->isVoidTy()) 1378 return Error(TypeLoc, "void type only allowed for function results"); 1379 return false; 1380 1381 // Type ::= Type '*' 1382 case lltok::star: 1383 if (Result->isLabelTy()) 1384 return TokError("basic block pointers are invalid"); 1385 if (Result->isVoidTy()) 1386 return TokError("pointers to void are invalid - use i8* instead"); 1387 if (!PointerType::isValidElementType(Result)) 1388 return TokError("pointer to this type is invalid"); 1389 Result = PointerType::getUnqual(Result); 1390 Lex.Lex(); 1391 break; 1392 1393 // Type ::= Type 'addrspace' '(' uint32 ')' '*' 1394 case lltok::kw_addrspace: { 1395 if (Result->isLabelTy()) 1396 return TokError("basic block pointers are invalid"); 1397 if (Result->isVoidTy()) 1398 return TokError("pointers to void are invalid; use i8* instead"); 1399 if (!PointerType::isValidElementType(Result)) 1400 return TokError("pointer to this type is invalid"); 1401 unsigned AddrSpace; 1402 if (ParseOptionalAddrSpace(AddrSpace) || 1403 ParseToken(lltok::star, "expected '*' in address space")) 1404 return true; 1405 1406 Result = PointerType::get(Result, AddrSpace); 1407 break; 1408 } 1409 1410 /// Types '(' ArgTypeListI ')' OptFuncAttrs 1411 case lltok::lparen: 1412 if (ParseFunctionType(Result)) 1413 return true; 1414 break; 1415 } 1416 } 1417} 1418 1419/// ParseParameterList 1420/// ::= '(' ')' 1421/// ::= '(' Arg (',' Arg)* ')' 1422/// Arg 1423/// ::= Type OptionalAttributes Value OptionalAttributes 1424bool LLParser::ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList, 1425 PerFunctionState &PFS) { 1426 if (ParseToken(lltok::lparen, "expected '(' in call")) 1427 return true; 1428 1429 while (Lex.getKind() != lltok::rparen) { 1430 // If this isn't the first argument, we need a comma. 1431 if (!ArgList.empty() && 1432 ParseToken(lltok::comma, "expected ',' in argument list")) 1433 return true; 1434 1435 // Parse the argument. 1436 LocTy ArgLoc; 1437 Type *ArgTy = 0; 1438 Attributes::Builder ArgAttrs; 1439 Value *V; 1440 if (ParseType(ArgTy, ArgLoc)) 1441 return true; 1442 1443 // Otherwise, handle normal operands. 1444 if (ParseOptionalAttrs(ArgAttrs, 0) || ParseValue(ArgTy, V, PFS)) 1445 return true; 1446 ArgList.push_back(ParamInfo(ArgLoc, V, Attributes::get(ArgAttrs))); 1447 } 1448 1449 Lex.Lex(); // Lex the ')'. 1450 return false; 1451} 1452 1453 1454 1455/// ParseArgumentList - Parse the argument list for a function type or function 1456/// prototype. 1457/// ::= '(' ArgTypeListI ')' 1458/// ArgTypeListI 1459/// ::= /*empty*/ 1460/// ::= '...' 1461/// ::= ArgTypeList ',' '...' 1462/// ::= ArgType (',' ArgType)* 1463/// 1464bool LLParser::ParseArgumentList(SmallVectorImpl<ArgInfo> &ArgList, 1465 bool &isVarArg){ 1466 isVarArg = false; 1467 assert(Lex.getKind() == lltok::lparen); 1468 Lex.Lex(); // eat the (. 1469 1470 if (Lex.getKind() == lltok::rparen) { 1471 // empty 1472 } else if (Lex.getKind() == lltok::dotdotdot) { 1473 isVarArg = true; 1474 Lex.Lex(); 1475 } else { 1476 LocTy TypeLoc = Lex.getLoc(); 1477 Type *ArgTy = 0; 1478 Attributes::Builder Attrs; 1479 std::string Name; 1480 1481 if (ParseType(ArgTy) || 1482 ParseOptionalAttrs(Attrs, 0)) return true; 1483 1484 if (ArgTy->isVoidTy()) 1485 return Error(TypeLoc, "argument can not have void type"); 1486 1487 if (Lex.getKind() == lltok::LocalVar) { 1488 Name = Lex.getStrVal(); 1489 Lex.Lex(); 1490 } 1491 1492 if (!FunctionType::isValidArgumentType(ArgTy)) 1493 return Error(TypeLoc, "invalid type for function argument"); 1494 1495 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attributes::get(Attrs), Name)); 1496 1497 while (EatIfPresent(lltok::comma)) { 1498 // Handle ... at end of arg list. 1499 if (EatIfPresent(lltok::dotdotdot)) { 1500 isVarArg = true; 1501 break; 1502 } 1503 1504 // Otherwise must be an argument type. 1505 TypeLoc = Lex.getLoc(); 1506 if (ParseType(ArgTy) || ParseOptionalAttrs(Attrs, 0)) return true; 1507 1508 if (ArgTy->isVoidTy()) 1509 return Error(TypeLoc, "argument can not have void type"); 1510 1511 if (Lex.getKind() == lltok::LocalVar) { 1512 Name = Lex.getStrVal(); 1513 Lex.Lex(); 1514 } else { 1515 Name = ""; 1516 } 1517 1518 if (!ArgTy->isFirstClassType()) 1519 return Error(TypeLoc, "invalid type for function argument"); 1520 1521 ArgList.push_back(ArgInfo(TypeLoc, ArgTy, Attributes::get(Attrs), Name)); 1522 } 1523 } 1524 1525 return ParseToken(lltok::rparen, "expected ')' at end of argument list"); 1526} 1527 1528/// ParseFunctionType 1529/// ::= Type ArgumentList OptionalAttrs 1530bool LLParser::ParseFunctionType(Type *&Result) { 1531 assert(Lex.getKind() == lltok::lparen); 1532 1533 if (!FunctionType::isValidReturnType(Result)) 1534 return TokError("invalid function return type"); 1535 1536 SmallVector<ArgInfo, 8> ArgList; 1537 bool isVarArg; 1538 if (ParseArgumentList(ArgList, isVarArg)) 1539 return true; 1540 1541 // Reject names on the arguments lists. 1542 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 1543 if (!ArgList[i].Name.empty()) 1544 return Error(ArgList[i].Loc, "argument name invalid in function type"); 1545 if (ArgList[i].Attrs) 1546 return Error(ArgList[i].Loc, 1547 "argument attributes invalid in function type"); 1548 } 1549 1550 SmallVector<Type*, 16> ArgListTy; 1551 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 1552 ArgListTy.push_back(ArgList[i].Ty); 1553 1554 Result = FunctionType::get(Result, ArgListTy, isVarArg); 1555 return false; 1556} 1557 1558/// ParseAnonStructType - Parse an anonymous struct type, which is inlined into 1559/// other structs. 1560bool LLParser::ParseAnonStructType(Type *&Result, bool Packed) { 1561 SmallVector<Type*, 8> Elts; 1562 if (ParseStructBody(Elts)) return true; 1563 1564 Result = StructType::get(Context, Elts, Packed); 1565 return false; 1566} 1567 1568/// ParseStructDefinition - Parse a struct in a 'type' definition. 1569bool LLParser::ParseStructDefinition(SMLoc TypeLoc, StringRef Name, 1570 std::pair<Type*, LocTy> &Entry, 1571 Type *&ResultTy) { 1572 // If the type was already defined, diagnose the redefinition. 1573 if (Entry.first && !Entry.second.isValid()) 1574 return Error(TypeLoc, "redefinition of type"); 1575 1576 // If we have opaque, just return without filling in the definition for the 1577 // struct. This counts as a definition as far as the .ll file goes. 1578 if (EatIfPresent(lltok::kw_opaque)) { 1579 // This type is being defined, so clear the location to indicate this. 1580 Entry.second = SMLoc(); 1581 1582 // If this type number has never been uttered, create it. 1583 if (Entry.first == 0) 1584 Entry.first = StructType::create(Context, Name); 1585 ResultTy = Entry.first; 1586 return false; 1587 } 1588 1589 // If the type starts with '<', then it is either a packed struct or a vector. 1590 bool isPacked = EatIfPresent(lltok::less); 1591 1592 // If we don't have a struct, then we have a random type alias, which we 1593 // accept for compatibility with old files. These types are not allowed to be 1594 // forward referenced and not allowed to be recursive. 1595 if (Lex.getKind() != lltok::lbrace) { 1596 if (Entry.first) 1597 return Error(TypeLoc, "forward references to non-struct type"); 1598 1599 ResultTy = 0; 1600 if (isPacked) 1601 return ParseArrayVectorType(ResultTy, true); 1602 return ParseType(ResultTy); 1603 } 1604 1605 // This type is being defined, so clear the location to indicate this. 1606 Entry.second = SMLoc(); 1607 1608 // If this type number has never been uttered, create it. 1609 if (Entry.first == 0) 1610 Entry.first = StructType::create(Context, Name); 1611 1612 StructType *STy = cast<StructType>(Entry.first); 1613 1614 SmallVector<Type*, 8> Body; 1615 if (ParseStructBody(Body) || 1616 (isPacked && ParseToken(lltok::greater, "expected '>' in packed struct"))) 1617 return true; 1618 1619 STy->setBody(Body, isPacked); 1620 ResultTy = STy; 1621 return false; 1622} 1623 1624 1625/// ParseStructType: Handles packed and unpacked types. </> parsed elsewhere. 1626/// StructType 1627/// ::= '{' '}' 1628/// ::= '{' Type (',' Type)* '}' 1629/// ::= '<' '{' '}' '>' 1630/// ::= '<' '{' Type (',' Type)* '}' '>' 1631bool LLParser::ParseStructBody(SmallVectorImpl<Type*> &Body) { 1632 assert(Lex.getKind() == lltok::lbrace); 1633 Lex.Lex(); // Consume the '{' 1634 1635 // Handle the empty struct. 1636 if (EatIfPresent(lltok::rbrace)) 1637 return false; 1638 1639 LocTy EltTyLoc = Lex.getLoc(); 1640 Type *Ty = 0; 1641 if (ParseType(Ty)) return true; 1642 Body.push_back(Ty); 1643 1644 if (!StructType::isValidElementType(Ty)) 1645 return Error(EltTyLoc, "invalid element type for struct"); 1646 1647 while (EatIfPresent(lltok::comma)) { 1648 EltTyLoc = Lex.getLoc(); 1649 if (ParseType(Ty)) return true; 1650 1651 if (!StructType::isValidElementType(Ty)) 1652 return Error(EltTyLoc, "invalid element type for struct"); 1653 1654 Body.push_back(Ty); 1655 } 1656 1657 return ParseToken(lltok::rbrace, "expected '}' at end of struct"); 1658} 1659 1660/// ParseArrayVectorType - Parse an array or vector type, assuming the first 1661/// token has already been consumed. 1662/// Type 1663/// ::= '[' APSINTVAL 'x' Types ']' 1664/// ::= '<' APSINTVAL 'x' Types '>' 1665bool LLParser::ParseArrayVectorType(Type *&Result, bool isVector) { 1666 if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned() || 1667 Lex.getAPSIntVal().getBitWidth() > 64) 1668 return TokError("expected number in address space"); 1669 1670 LocTy SizeLoc = Lex.getLoc(); 1671 uint64_t Size = Lex.getAPSIntVal().getZExtValue(); 1672 Lex.Lex(); 1673 1674 if (ParseToken(lltok::kw_x, "expected 'x' after element count")) 1675 return true; 1676 1677 LocTy TypeLoc = Lex.getLoc(); 1678 Type *EltTy = 0; 1679 if (ParseType(EltTy)) return true; 1680 1681 if (ParseToken(isVector ? lltok::greater : lltok::rsquare, 1682 "expected end of sequential type")) 1683 return true; 1684 1685 if (isVector) { 1686 if (Size == 0) 1687 return Error(SizeLoc, "zero element vector is illegal"); 1688 if ((unsigned)Size != Size) 1689 return Error(SizeLoc, "size too large for vector"); 1690 if (!VectorType::isValidElementType(EltTy)) 1691 return Error(TypeLoc, 1692 "vector element type must be fp, integer or a pointer to these types"); 1693 Result = VectorType::get(EltTy, unsigned(Size)); 1694 } else { 1695 if (!ArrayType::isValidElementType(EltTy)) 1696 return Error(TypeLoc, "invalid array element type"); 1697 Result = ArrayType::get(EltTy, Size); 1698 } 1699 return false; 1700} 1701 1702//===----------------------------------------------------------------------===// 1703// Function Semantic Analysis. 1704//===----------------------------------------------------------------------===// 1705 1706LLParser::PerFunctionState::PerFunctionState(LLParser &p, Function &f, 1707 int functionNumber) 1708 : P(p), F(f), FunctionNumber(functionNumber) { 1709 1710 // Insert unnamed arguments into the NumberedVals list. 1711 for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 1712 AI != E; ++AI) 1713 if (!AI->hasName()) 1714 NumberedVals.push_back(AI); 1715} 1716 1717LLParser::PerFunctionState::~PerFunctionState() { 1718 // If there were any forward referenced non-basicblock values, delete them. 1719 for (std::map<std::string, std::pair<Value*, LocTy> >::iterator 1720 I = ForwardRefVals.begin(), E = ForwardRefVals.end(); I != E; ++I) 1721 if (!isa<BasicBlock>(I->second.first)) { 1722 I->second.first->replaceAllUsesWith( 1723 UndefValue::get(I->second.first->getType())); 1724 delete I->second.first; 1725 I->second.first = 0; 1726 } 1727 1728 for (std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1729 I = ForwardRefValIDs.begin(), E = ForwardRefValIDs.end(); I != E; ++I) 1730 if (!isa<BasicBlock>(I->second.first)) { 1731 I->second.first->replaceAllUsesWith( 1732 UndefValue::get(I->second.first->getType())); 1733 delete I->second.first; 1734 I->second.first = 0; 1735 } 1736} 1737 1738bool LLParser::PerFunctionState::FinishFunction() { 1739 // Check to see if someone took the address of labels in this block. 1740 if (!P.ForwardRefBlockAddresses.empty()) { 1741 ValID FunctionID; 1742 if (!F.getName().empty()) { 1743 FunctionID.Kind = ValID::t_GlobalName; 1744 FunctionID.StrVal = F.getName(); 1745 } else { 1746 FunctionID.Kind = ValID::t_GlobalID; 1747 FunctionID.UIntVal = FunctionNumber; 1748 } 1749 1750 std::map<ValID, std::vector<std::pair<ValID, GlobalValue*> > >::iterator 1751 FRBAI = P.ForwardRefBlockAddresses.find(FunctionID); 1752 if (FRBAI != P.ForwardRefBlockAddresses.end()) { 1753 // Resolve all these references. 1754 if (P.ResolveForwardRefBlockAddresses(&F, FRBAI->second, this)) 1755 return true; 1756 1757 P.ForwardRefBlockAddresses.erase(FRBAI); 1758 } 1759 } 1760 1761 if (!ForwardRefVals.empty()) 1762 return P.Error(ForwardRefVals.begin()->second.second, 1763 "use of undefined value '%" + ForwardRefVals.begin()->first + 1764 "'"); 1765 if (!ForwardRefValIDs.empty()) 1766 return P.Error(ForwardRefValIDs.begin()->second.second, 1767 "use of undefined value '%" + 1768 Twine(ForwardRefValIDs.begin()->first) + "'"); 1769 return false; 1770} 1771 1772 1773/// GetVal - Get a value with the specified name or ID, creating a 1774/// forward reference record if needed. This can return null if the value 1775/// exists but does not have the right type. 1776Value *LLParser::PerFunctionState::GetVal(const std::string &Name, 1777 Type *Ty, LocTy Loc) { 1778 // Look this name up in the normal function symbol table. 1779 Value *Val = F.getValueSymbolTable().lookup(Name); 1780 1781 // If this is a forward reference for the value, see if we already created a 1782 // forward ref record. 1783 if (Val == 0) { 1784 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1785 I = ForwardRefVals.find(Name); 1786 if (I != ForwardRefVals.end()) 1787 Val = I->second.first; 1788 } 1789 1790 // If we have the value in the symbol table or fwd-ref table, return it. 1791 if (Val) { 1792 if (Val->getType() == Ty) return Val; 1793 if (Ty->isLabelTy()) 1794 P.Error(Loc, "'%" + Name + "' is not a basic block"); 1795 else 1796 P.Error(Loc, "'%" + Name + "' defined with type '" + 1797 getTypeString(Val->getType()) + "'"); 1798 return 0; 1799 } 1800 1801 // Don't make placeholders with invalid type. 1802 if (!Ty->isFirstClassType() && !Ty->isLabelTy()) { 1803 P.Error(Loc, "invalid use of a non-first-class type"); 1804 return 0; 1805 } 1806 1807 // Otherwise, create a new forward reference for this value and remember it. 1808 Value *FwdVal; 1809 if (Ty->isLabelTy()) 1810 FwdVal = BasicBlock::Create(F.getContext(), Name, &F); 1811 else 1812 FwdVal = new Argument(Ty, Name); 1813 1814 ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); 1815 return FwdVal; 1816} 1817 1818Value *LLParser::PerFunctionState::GetVal(unsigned ID, Type *Ty, 1819 LocTy Loc) { 1820 // Look this name up in the normal function symbol table. 1821 Value *Val = ID < NumberedVals.size() ? NumberedVals[ID] : 0; 1822 1823 // If this is a forward reference for the value, see if we already created a 1824 // forward ref record. 1825 if (Val == 0) { 1826 std::map<unsigned, std::pair<Value*, LocTy> >::iterator 1827 I = ForwardRefValIDs.find(ID); 1828 if (I != ForwardRefValIDs.end()) 1829 Val = I->second.first; 1830 } 1831 1832 // If we have the value in the symbol table or fwd-ref table, return it. 1833 if (Val) { 1834 if (Val->getType() == Ty) return Val; 1835 if (Ty->isLabelTy()) 1836 P.Error(Loc, "'%" + Twine(ID) + "' is not a basic block"); 1837 else 1838 P.Error(Loc, "'%" + Twine(ID) + "' defined with type '" + 1839 getTypeString(Val->getType()) + "'"); 1840 return 0; 1841 } 1842 1843 if (!Ty->isFirstClassType() && !Ty->isLabelTy()) { 1844 P.Error(Loc, "invalid use of a non-first-class type"); 1845 return 0; 1846 } 1847 1848 // Otherwise, create a new forward reference for this value and remember it. 1849 Value *FwdVal; 1850 if (Ty->isLabelTy()) 1851 FwdVal = BasicBlock::Create(F.getContext(), "", &F); 1852 else 1853 FwdVal = new Argument(Ty); 1854 1855 ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); 1856 return FwdVal; 1857} 1858 1859/// SetInstName - After an instruction is parsed and inserted into its 1860/// basic block, this installs its name. 1861bool LLParser::PerFunctionState::SetInstName(int NameID, 1862 const std::string &NameStr, 1863 LocTy NameLoc, Instruction *Inst) { 1864 // If this instruction has void type, it cannot have a name or ID specified. 1865 if (Inst->getType()->isVoidTy()) { 1866 if (NameID != -1 || !NameStr.empty()) 1867 return P.Error(NameLoc, "instructions returning void cannot have a name"); 1868 return false; 1869 } 1870 1871 // If this was a numbered instruction, verify that the instruction is the 1872 // expected value and resolve any forward references. 1873 if (NameStr.empty()) { 1874 // If neither a name nor an ID was specified, just use the next ID. 1875 if (NameID == -1) 1876 NameID = NumberedVals.size(); 1877 1878 if (unsigned(NameID) != NumberedVals.size()) 1879 return P.Error(NameLoc, "instruction expected to be numbered '%" + 1880 Twine(NumberedVals.size()) + "'"); 1881 1882 std::map<unsigned, std::pair<Value*, LocTy> >::iterator FI = 1883 ForwardRefValIDs.find(NameID); 1884 if (FI != ForwardRefValIDs.end()) { 1885 if (FI->second.first->getType() != Inst->getType()) 1886 return P.Error(NameLoc, "instruction forward referenced with type '" + 1887 getTypeString(FI->second.first->getType()) + "'"); 1888 FI->second.first->replaceAllUsesWith(Inst); 1889 delete FI->second.first; 1890 ForwardRefValIDs.erase(FI); 1891 } 1892 1893 NumberedVals.push_back(Inst); 1894 return false; 1895 } 1896 1897 // Otherwise, the instruction had a name. Resolve forward refs and set it. 1898 std::map<std::string, std::pair<Value*, LocTy> >::iterator 1899 FI = ForwardRefVals.find(NameStr); 1900 if (FI != ForwardRefVals.end()) { 1901 if (FI->second.first->getType() != Inst->getType()) 1902 return P.Error(NameLoc, "instruction forward referenced with type '" + 1903 getTypeString(FI->second.first->getType()) + "'"); 1904 FI->second.first->replaceAllUsesWith(Inst); 1905 delete FI->second.first; 1906 ForwardRefVals.erase(FI); 1907 } 1908 1909 // Set the name on the instruction. 1910 Inst->setName(NameStr); 1911 1912 if (Inst->getName() != NameStr) 1913 return P.Error(NameLoc, "multiple definition of local value named '" + 1914 NameStr + "'"); 1915 return false; 1916} 1917 1918/// GetBB - Get a basic block with the specified name or ID, creating a 1919/// forward reference record if needed. 1920BasicBlock *LLParser::PerFunctionState::GetBB(const std::string &Name, 1921 LocTy Loc) { 1922 return cast_or_null<BasicBlock>(GetVal(Name, 1923 Type::getLabelTy(F.getContext()), Loc)); 1924} 1925 1926BasicBlock *LLParser::PerFunctionState::GetBB(unsigned ID, LocTy Loc) { 1927 return cast_or_null<BasicBlock>(GetVal(ID, 1928 Type::getLabelTy(F.getContext()), Loc)); 1929} 1930 1931/// DefineBB - Define the specified basic block, which is either named or 1932/// unnamed. If there is an error, this returns null otherwise it returns 1933/// the block being defined. 1934BasicBlock *LLParser::PerFunctionState::DefineBB(const std::string &Name, 1935 LocTy Loc) { 1936 BasicBlock *BB; 1937 if (Name.empty()) 1938 BB = GetBB(NumberedVals.size(), Loc); 1939 else 1940 BB = GetBB(Name, Loc); 1941 if (BB == 0) return 0; // Already diagnosed error. 1942 1943 // Move the block to the end of the function. Forward ref'd blocks are 1944 // inserted wherever they happen to be referenced. 1945 F.getBasicBlockList().splice(F.end(), F.getBasicBlockList(), BB); 1946 1947 // Remove the block from forward ref sets. 1948 if (Name.empty()) { 1949 ForwardRefValIDs.erase(NumberedVals.size()); 1950 NumberedVals.push_back(BB); 1951 } else { 1952 // BB forward references are already in the function symbol table. 1953 ForwardRefVals.erase(Name); 1954 } 1955 1956 return BB; 1957} 1958 1959//===----------------------------------------------------------------------===// 1960// Constants. 1961//===----------------------------------------------------------------------===// 1962 1963/// ParseValID - Parse an abstract value that doesn't necessarily have a 1964/// type implied. For example, if we parse "4" we don't know what integer type 1965/// it has. The value will later be combined with its type and checked for 1966/// sanity. PFS is used to convert function-local operands of metadata (since 1967/// metadata operands are not just parsed here but also converted to values). 1968/// PFS can be null when we are not parsing metadata values inside a function. 1969bool LLParser::ParseValID(ValID &ID, PerFunctionState *PFS) { 1970 ID.Loc = Lex.getLoc(); 1971 switch (Lex.getKind()) { 1972 default: return TokError("expected value token"); 1973 case lltok::GlobalID: // @42 1974 ID.UIntVal = Lex.getUIntVal(); 1975 ID.Kind = ValID::t_GlobalID; 1976 break; 1977 case lltok::GlobalVar: // @foo 1978 ID.StrVal = Lex.getStrVal(); 1979 ID.Kind = ValID::t_GlobalName; 1980 break; 1981 case lltok::LocalVarID: // %42 1982 ID.UIntVal = Lex.getUIntVal(); 1983 ID.Kind = ValID::t_LocalID; 1984 break; 1985 case lltok::LocalVar: // %foo 1986 ID.StrVal = Lex.getStrVal(); 1987 ID.Kind = ValID::t_LocalName; 1988 break; 1989 case lltok::exclaim: // !42, !{...}, or !"foo" 1990 return ParseMetadataValue(ID, PFS); 1991 case lltok::APSInt: 1992 ID.APSIntVal = Lex.getAPSIntVal(); 1993 ID.Kind = ValID::t_APSInt; 1994 break; 1995 case lltok::APFloat: 1996 ID.APFloatVal = Lex.getAPFloatVal(); 1997 ID.Kind = ValID::t_APFloat; 1998 break; 1999 case lltok::kw_true: 2000 ID.ConstantVal = ConstantInt::getTrue(Context); 2001 ID.Kind = ValID::t_Constant; 2002 break; 2003 case lltok::kw_false: 2004 ID.ConstantVal = ConstantInt::getFalse(Context); 2005 ID.Kind = ValID::t_Constant; 2006 break; 2007 case lltok::kw_null: ID.Kind = ValID::t_Null; break; 2008 case lltok::kw_undef: ID.Kind = ValID::t_Undef; break; 2009 case lltok::kw_zeroinitializer: ID.Kind = ValID::t_Zero; break; 2010 2011 case lltok::lbrace: { 2012 // ValID ::= '{' ConstVector '}' 2013 Lex.Lex(); 2014 SmallVector<Constant*, 16> Elts; 2015 if (ParseGlobalValueVector(Elts) || 2016 ParseToken(lltok::rbrace, "expected end of struct constant")) 2017 return true; 2018 2019 ID.ConstantStructElts = new Constant*[Elts.size()]; 2020 ID.UIntVal = Elts.size(); 2021 memcpy(ID.ConstantStructElts, Elts.data(), Elts.size()*sizeof(Elts[0])); 2022 ID.Kind = ValID::t_ConstantStruct; 2023 return false; 2024 } 2025 case lltok::less: { 2026 // ValID ::= '<' ConstVector '>' --> Vector. 2027 // ValID ::= '<' '{' ConstVector '}' '>' --> Packed Struct. 2028 Lex.Lex(); 2029 bool isPackedStruct = EatIfPresent(lltok::lbrace); 2030 2031 SmallVector<Constant*, 16> Elts; 2032 LocTy FirstEltLoc = Lex.getLoc(); 2033 if (ParseGlobalValueVector(Elts) || 2034 (isPackedStruct && 2035 ParseToken(lltok::rbrace, "expected end of packed struct")) || 2036 ParseToken(lltok::greater, "expected end of constant")) 2037 return true; 2038 2039 if (isPackedStruct) { 2040 ID.ConstantStructElts = new Constant*[Elts.size()]; 2041 memcpy(ID.ConstantStructElts, Elts.data(), Elts.size()*sizeof(Elts[0])); 2042 ID.UIntVal = Elts.size(); 2043 ID.Kind = ValID::t_PackedConstantStruct; 2044 return false; 2045 } 2046 2047 if (Elts.empty()) 2048 return Error(ID.Loc, "constant vector must not be empty"); 2049 2050 if (!Elts[0]->getType()->isIntegerTy() && 2051 !Elts[0]->getType()->isFloatingPointTy() && 2052 !Elts[0]->getType()->isPointerTy()) 2053 return Error(FirstEltLoc, 2054 "vector elements must have integer, pointer or floating point type"); 2055 2056 // Verify that all the vector elements have the same type. 2057 for (unsigned i = 1, e = Elts.size(); i != e; ++i) 2058 if (Elts[i]->getType() != Elts[0]->getType()) 2059 return Error(FirstEltLoc, 2060 "vector element #" + Twine(i) + 2061 " is not of type '" + getTypeString(Elts[0]->getType())); 2062 2063 ID.ConstantVal = ConstantVector::get(Elts); 2064 ID.Kind = ValID::t_Constant; 2065 return false; 2066 } 2067 case lltok::lsquare: { // Array Constant 2068 Lex.Lex(); 2069 SmallVector<Constant*, 16> Elts; 2070 LocTy FirstEltLoc = Lex.getLoc(); 2071 if (ParseGlobalValueVector(Elts) || 2072 ParseToken(lltok::rsquare, "expected end of array constant")) 2073 return true; 2074 2075 // Handle empty element. 2076 if (Elts.empty()) { 2077 // Use undef instead of an array because it's inconvenient to determine 2078 // the element type at this point, there being no elements to examine. 2079 ID.Kind = ValID::t_EmptyArray; 2080 return false; 2081 } 2082 2083 if (!Elts[0]->getType()->isFirstClassType()) 2084 return Error(FirstEltLoc, "invalid array element type: " + 2085 getTypeString(Elts[0]->getType())); 2086 2087 ArrayType *ATy = ArrayType::get(Elts[0]->getType(), Elts.size()); 2088 2089 // Verify all elements are correct type! 2090 for (unsigned i = 0, e = Elts.size(); i != e; ++i) { 2091 if (Elts[i]->getType() != Elts[0]->getType()) 2092 return Error(FirstEltLoc, 2093 "array element #" + Twine(i) + 2094 " is not of type '" + getTypeString(Elts[0]->getType())); 2095 } 2096 2097 ID.ConstantVal = ConstantArray::get(ATy, Elts); 2098 ID.Kind = ValID::t_Constant; 2099 return false; 2100 } 2101 case lltok::kw_c: // c "foo" 2102 Lex.Lex(); 2103 ID.ConstantVal = ConstantDataArray::getString(Context, Lex.getStrVal(), 2104 false); 2105 if (ParseToken(lltok::StringConstant, "expected string")) return true; 2106 ID.Kind = ValID::t_Constant; 2107 return false; 2108 2109 case lltok::kw_asm: { 2110 // ValID ::= 'asm' SideEffect? AlignStack? STRINGCONSTANT ',' STRINGCONSTANT 2111 bool HasSideEffect, AlignStack, AsmDialect; 2112 Lex.Lex(); 2113 if (ParseOptionalToken(lltok::kw_sideeffect, HasSideEffect) || 2114 ParseOptionalToken(lltok::kw_alignstack, AlignStack) || 2115 ParseOptionalToken(lltok::kw_inteldialect, AsmDialect) || 2116 ParseStringConstant(ID.StrVal) || 2117 ParseToken(lltok::comma, "expected comma in inline asm expression") || 2118 ParseToken(lltok::StringConstant, "expected constraint string")) 2119 return true; 2120 ID.StrVal2 = Lex.getStrVal(); 2121 ID.UIntVal = unsigned(HasSideEffect) | (unsigned(AlignStack)<<1) | 2122 (unsigned(AsmDialect)<<2); 2123 ID.Kind = ValID::t_InlineAsm; 2124 return false; 2125 } 2126 2127 case lltok::kw_blockaddress: { 2128 // ValID ::= 'blockaddress' '(' @foo ',' %bar ')' 2129 Lex.Lex(); 2130 2131 ValID Fn, Label; 2132 LocTy FnLoc, LabelLoc; 2133 2134 if (ParseToken(lltok::lparen, "expected '(' in block address expression") || 2135 ParseValID(Fn) || 2136 ParseToken(lltok::comma, "expected comma in block address expression")|| 2137 ParseValID(Label) || 2138 ParseToken(lltok::rparen, "expected ')' in block address expression")) 2139 return true; 2140 2141 if (Fn.Kind != ValID::t_GlobalID && Fn.Kind != ValID::t_GlobalName) 2142 return Error(Fn.Loc, "expected function name in blockaddress"); 2143 if (Label.Kind != ValID::t_LocalID && Label.Kind != ValID::t_LocalName) 2144 return Error(Label.Loc, "expected basic block name in blockaddress"); 2145 2146 // Make a global variable as a placeholder for this reference. 2147 GlobalVariable *FwdRef = new GlobalVariable(*M, Type::getInt8Ty(Context), 2148 false, GlobalValue::InternalLinkage, 2149 0, ""); 2150 ForwardRefBlockAddresses[Fn].push_back(std::make_pair(Label, FwdRef)); 2151 ID.ConstantVal = FwdRef; 2152 ID.Kind = ValID::t_Constant; 2153 return false; 2154 } 2155 2156 case lltok::kw_trunc: 2157 case lltok::kw_zext: 2158 case lltok::kw_sext: 2159 case lltok::kw_fptrunc: 2160 case lltok::kw_fpext: 2161 case lltok::kw_bitcast: 2162 case lltok::kw_uitofp: 2163 case lltok::kw_sitofp: 2164 case lltok::kw_fptoui: 2165 case lltok::kw_fptosi: 2166 case lltok::kw_inttoptr: 2167 case lltok::kw_ptrtoint: { 2168 unsigned Opc = Lex.getUIntVal(); 2169 Type *DestTy = 0; 2170 Constant *SrcVal; 2171 Lex.Lex(); 2172 if (ParseToken(lltok::lparen, "expected '(' after constantexpr cast") || 2173 ParseGlobalTypeAndValue(SrcVal) || 2174 ParseToken(lltok::kw_to, "expected 'to' in constantexpr cast") || 2175 ParseType(DestTy) || 2176 ParseToken(lltok::rparen, "expected ')' at end of constantexpr cast")) 2177 return true; 2178 if (!CastInst::castIsValid((Instruction::CastOps)Opc, SrcVal, DestTy)) 2179 return Error(ID.Loc, "invalid cast opcode for cast from '" + 2180 getTypeString(SrcVal->getType()) + "' to '" + 2181 getTypeString(DestTy) + "'"); 2182 ID.ConstantVal = ConstantExpr::getCast((Instruction::CastOps)Opc, 2183 SrcVal, DestTy); 2184 ID.Kind = ValID::t_Constant; 2185 return false; 2186 } 2187 case lltok::kw_extractvalue: { 2188 Lex.Lex(); 2189 Constant *Val; 2190 SmallVector<unsigned, 4> Indices; 2191 if (ParseToken(lltok::lparen, "expected '(' in extractvalue constantexpr")|| 2192 ParseGlobalTypeAndValue(Val) || 2193 ParseIndexList(Indices) || 2194 ParseToken(lltok::rparen, "expected ')' in extractvalue constantexpr")) 2195 return true; 2196 2197 if (!Val->getType()->isAggregateType()) 2198 return Error(ID.Loc, "extractvalue operand must be aggregate type"); 2199 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices)) 2200 return Error(ID.Loc, "invalid indices for extractvalue"); 2201 ID.ConstantVal = ConstantExpr::getExtractValue(Val, Indices); 2202 ID.Kind = ValID::t_Constant; 2203 return false; 2204 } 2205 case lltok::kw_insertvalue: { 2206 Lex.Lex(); 2207 Constant *Val0, *Val1; 2208 SmallVector<unsigned, 4> Indices; 2209 if (ParseToken(lltok::lparen, "expected '(' in insertvalue constantexpr")|| 2210 ParseGlobalTypeAndValue(Val0) || 2211 ParseToken(lltok::comma, "expected comma in insertvalue constantexpr")|| 2212 ParseGlobalTypeAndValue(Val1) || 2213 ParseIndexList(Indices) || 2214 ParseToken(lltok::rparen, "expected ')' in insertvalue constantexpr")) 2215 return true; 2216 if (!Val0->getType()->isAggregateType()) 2217 return Error(ID.Loc, "insertvalue operand must be aggregate type"); 2218 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices)) 2219 return Error(ID.Loc, "invalid indices for insertvalue"); 2220 ID.ConstantVal = ConstantExpr::getInsertValue(Val0, Val1, Indices); 2221 ID.Kind = ValID::t_Constant; 2222 return false; 2223 } 2224 case lltok::kw_icmp: 2225 case lltok::kw_fcmp: { 2226 unsigned PredVal, Opc = Lex.getUIntVal(); 2227 Constant *Val0, *Val1; 2228 Lex.Lex(); 2229 if (ParseCmpPredicate(PredVal, Opc) || 2230 ParseToken(lltok::lparen, "expected '(' in compare constantexpr") || 2231 ParseGlobalTypeAndValue(Val0) || 2232 ParseToken(lltok::comma, "expected comma in compare constantexpr") || 2233 ParseGlobalTypeAndValue(Val1) || 2234 ParseToken(lltok::rparen, "expected ')' in compare constantexpr")) 2235 return true; 2236 2237 if (Val0->getType() != Val1->getType()) 2238 return Error(ID.Loc, "compare operands must have the same type"); 2239 2240 CmpInst::Predicate Pred = (CmpInst::Predicate)PredVal; 2241 2242 if (Opc == Instruction::FCmp) { 2243 if (!Val0->getType()->isFPOrFPVectorTy()) 2244 return Error(ID.Loc, "fcmp requires floating point operands"); 2245 ID.ConstantVal = ConstantExpr::getFCmp(Pred, Val0, Val1); 2246 } else { 2247 assert(Opc == Instruction::ICmp && "Unexpected opcode for CmpInst!"); 2248 if (!Val0->getType()->isIntOrIntVectorTy() && 2249 !Val0->getType()->getScalarType()->isPointerTy()) 2250 return Error(ID.Loc, "icmp requires pointer or integer operands"); 2251 ID.ConstantVal = ConstantExpr::getICmp(Pred, Val0, Val1); 2252 } 2253 ID.Kind = ValID::t_Constant; 2254 return false; 2255 } 2256 2257 // Binary Operators. 2258 case lltok::kw_add: 2259 case lltok::kw_fadd: 2260 case lltok::kw_sub: 2261 case lltok::kw_fsub: 2262 case lltok::kw_mul: 2263 case lltok::kw_fmul: 2264 case lltok::kw_udiv: 2265 case lltok::kw_sdiv: 2266 case lltok::kw_fdiv: 2267 case lltok::kw_urem: 2268 case lltok::kw_srem: 2269 case lltok::kw_frem: 2270 case lltok::kw_shl: 2271 case lltok::kw_lshr: 2272 case lltok::kw_ashr: { 2273 bool NUW = false; 2274 bool NSW = false; 2275 bool Exact = false; 2276 unsigned Opc = Lex.getUIntVal(); 2277 Constant *Val0, *Val1; 2278 Lex.Lex(); 2279 LocTy ModifierLoc = Lex.getLoc(); 2280 if (Opc == Instruction::Add || Opc == Instruction::Sub || 2281 Opc == Instruction::Mul || Opc == Instruction::Shl) { 2282 if (EatIfPresent(lltok::kw_nuw)) 2283 NUW = true; 2284 if (EatIfPresent(lltok::kw_nsw)) { 2285 NSW = true; 2286 if (EatIfPresent(lltok::kw_nuw)) 2287 NUW = true; 2288 } 2289 } else if (Opc == Instruction::SDiv || Opc == Instruction::UDiv || 2290 Opc == Instruction::LShr || Opc == Instruction::AShr) { 2291 if (EatIfPresent(lltok::kw_exact)) 2292 Exact = true; 2293 } 2294 if (ParseToken(lltok::lparen, "expected '(' in binary constantexpr") || 2295 ParseGlobalTypeAndValue(Val0) || 2296 ParseToken(lltok::comma, "expected comma in binary constantexpr") || 2297 ParseGlobalTypeAndValue(Val1) || 2298 ParseToken(lltok::rparen, "expected ')' in binary constantexpr")) 2299 return true; 2300 if (Val0->getType() != Val1->getType()) 2301 return Error(ID.Loc, "operands of constexpr must have same type"); 2302 if (!Val0->getType()->isIntOrIntVectorTy()) { 2303 if (NUW) 2304 return Error(ModifierLoc, "nuw only applies to integer operations"); 2305 if (NSW) 2306 return Error(ModifierLoc, "nsw only applies to integer operations"); 2307 } 2308 // Check that the type is valid for the operator. 2309 switch (Opc) { 2310 case Instruction::Add: 2311 case Instruction::Sub: 2312 case Instruction::Mul: 2313 case Instruction::UDiv: 2314 case Instruction::SDiv: 2315 case Instruction::URem: 2316 case Instruction::SRem: 2317 case Instruction::Shl: 2318 case Instruction::AShr: 2319 case Instruction::LShr: 2320 if (!Val0->getType()->isIntOrIntVectorTy()) 2321 return Error(ID.Loc, "constexpr requires integer operands"); 2322 break; 2323 case Instruction::FAdd: 2324 case Instruction::FSub: 2325 case Instruction::FMul: 2326 case Instruction::FDiv: 2327 case Instruction::FRem: 2328 if (!Val0->getType()->isFPOrFPVectorTy()) 2329 return Error(ID.Loc, "constexpr requires fp operands"); 2330 break; 2331 default: llvm_unreachable("Unknown binary operator!"); 2332 } 2333 unsigned Flags = 0; 2334 if (NUW) Flags |= OverflowingBinaryOperator::NoUnsignedWrap; 2335 if (NSW) Flags |= OverflowingBinaryOperator::NoSignedWrap; 2336 if (Exact) Flags |= PossiblyExactOperator::IsExact; 2337 Constant *C = ConstantExpr::get(Opc, Val0, Val1, Flags); 2338 ID.ConstantVal = C; 2339 ID.Kind = ValID::t_Constant; 2340 return false; 2341 } 2342 2343 // Logical Operations 2344 case lltok::kw_and: 2345 case lltok::kw_or: 2346 case lltok::kw_xor: { 2347 unsigned Opc = Lex.getUIntVal(); 2348 Constant *Val0, *Val1; 2349 Lex.Lex(); 2350 if (ParseToken(lltok::lparen, "expected '(' in logical constantexpr") || 2351 ParseGlobalTypeAndValue(Val0) || 2352 ParseToken(lltok::comma, "expected comma in logical constantexpr") || 2353 ParseGlobalTypeAndValue(Val1) || 2354 ParseToken(lltok::rparen, "expected ')' in logical constantexpr")) 2355 return true; 2356 if (Val0->getType() != Val1->getType()) 2357 return Error(ID.Loc, "operands of constexpr must have same type"); 2358 if (!Val0->getType()->isIntOrIntVectorTy()) 2359 return Error(ID.Loc, 2360 "constexpr requires integer or integer vector operands"); 2361 ID.ConstantVal = ConstantExpr::get(Opc, Val0, Val1); 2362 ID.Kind = ValID::t_Constant; 2363 return false; 2364 } 2365 2366 case lltok::kw_getelementptr: 2367 case lltok::kw_shufflevector: 2368 case lltok::kw_insertelement: 2369 case lltok::kw_extractelement: 2370 case lltok::kw_select: { 2371 unsigned Opc = Lex.getUIntVal(); 2372 SmallVector<Constant*, 16> Elts; 2373 bool InBounds = false; 2374 Lex.Lex(); 2375 if (Opc == Instruction::GetElementPtr) 2376 InBounds = EatIfPresent(lltok::kw_inbounds); 2377 if (ParseToken(lltok::lparen, "expected '(' in constantexpr") || 2378 ParseGlobalValueVector(Elts) || 2379 ParseToken(lltok::rparen, "expected ')' in constantexpr")) 2380 return true; 2381 2382 if (Opc == Instruction::GetElementPtr) { 2383 if (Elts.size() == 0 || 2384 !Elts[0]->getType()->getScalarType()->isPointerTy()) 2385 return Error(ID.Loc, "getelementptr requires pointer operand"); 2386 2387 ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end()); 2388 if (!GetElementPtrInst::getIndexedType(Elts[0]->getType(), Indices)) 2389 return Error(ID.Loc, "invalid indices for getelementptr"); 2390 ID.ConstantVal = ConstantExpr::getGetElementPtr(Elts[0], Indices, 2391 InBounds); 2392 } else if (Opc == Instruction::Select) { 2393 if (Elts.size() != 3) 2394 return Error(ID.Loc, "expected three operands to select"); 2395 if (const char *Reason = SelectInst::areInvalidOperands(Elts[0], Elts[1], 2396 Elts[2])) 2397 return Error(ID.Loc, Reason); 2398 ID.ConstantVal = ConstantExpr::getSelect(Elts[0], Elts[1], Elts[2]); 2399 } else if (Opc == Instruction::ShuffleVector) { 2400 if (Elts.size() != 3) 2401 return Error(ID.Loc, "expected three operands to shufflevector"); 2402 if (!ShuffleVectorInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2403 return Error(ID.Loc, "invalid operands to shufflevector"); 2404 ID.ConstantVal = 2405 ConstantExpr::getShuffleVector(Elts[0], Elts[1],Elts[2]); 2406 } else if (Opc == Instruction::ExtractElement) { 2407 if (Elts.size() != 2) 2408 return Error(ID.Loc, "expected two operands to extractelement"); 2409 if (!ExtractElementInst::isValidOperands(Elts[0], Elts[1])) 2410 return Error(ID.Loc, "invalid extractelement operands"); 2411 ID.ConstantVal = ConstantExpr::getExtractElement(Elts[0], Elts[1]); 2412 } else { 2413 assert(Opc == Instruction::InsertElement && "Unknown opcode"); 2414 if (Elts.size() != 3) 2415 return Error(ID.Loc, "expected three operands to insertelement"); 2416 if (!InsertElementInst::isValidOperands(Elts[0], Elts[1], Elts[2])) 2417 return Error(ID.Loc, "invalid insertelement operands"); 2418 ID.ConstantVal = 2419 ConstantExpr::getInsertElement(Elts[0], Elts[1],Elts[2]); 2420 } 2421 2422 ID.Kind = ValID::t_Constant; 2423 return false; 2424 } 2425 } 2426 2427 Lex.Lex(); 2428 return false; 2429} 2430 2431/// ParseGlobalValue - Parse a global value with the specified type. 2432bool LLParser::ParseGlobalValue(Type *Ty, Constant *&C) { 2433 C = 0; 2434 ValID ID; 2435 Value *V = NULL; 2436 bool Parsed = ParseValID(ID) || 2437 ConvertValIDToValue(Ty, ID, V, NULL); 2438 if (V && !(C = dyn_cast<Constant>(V))) 2439 return Error(ID.Loc, "global values must be constants"); 2440 return Parsed; 2441} 2442 2443bool LLParser::ParseGlobalTypeAndValue(Constant *&V) { 2444 Type *Ty = 0; 2445 return ParseType(Ty) || 2446 ParseGlobalValue(Ty, V); 2447} 2448 2449/// ParseGlobalValueVector 2450/// ::= /*empty*/ 2451/// ::= TypeAndValue (',' TypeAndValue)* 2452bool LLParser::ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts) { 2453 // Empty list. 2454 if (Lex.getKind() == lltok::rbrace || 2455 Lex.getKind() == lltok::rsquare || 2456 Lex.getKind() == lltok::greater || 2457 Lex.getKind() == lltok::rparen) 2458 return false; 2459 2460 Constant *C; 2461 if (ParseGlobalTypeAndValue(C)) return true; 2462 Elts.push_back(C); 2463 2464 while (EatIfPresent(lltok::comma)) { 2465 if (ParseGlobalTypeAndValue(C)) return true; 2466 Elts.push_back(C); 2467 } 2468 2469 return false; 2470} 2471 2472bool LLParser::ParseMetadataListValue(ValID &ID, PerFunctionState *PFS) { 2473 assert(Lex.getKind() == lltok::lbrace); 2474 Lex.Lex(); 2475 2476 SmallVector<Value*, 16> Elts; 2477 if (ParseMDNodeVector(Elts, PFS) || 2478 ParseToken(lltok::rbrace, "expected end of metadata node")) 2479 return true; 2480 2481 ID.MDNodeVal = MDNode::get(Context, Elts); 2482 ID.Kind = ValID::t_MDNode; 2483 return false; 2484} 2485 2486/// ParseMetadataValue 2487/// ::= !42 2488/// ::= !{...} 2489/// ::= !"string" 2490bool LLParser::ParseMetadataValue(ValID &ID, PerFunctionState *PFS) { 2491 assert(Lex.getKind() == lltok::exclaim); 2492 Lex.Lex(); 2493 2494 // MDNode: 2495 // !{ ... } 2496 if (Lex.getKind() == lltok::lbrace) 2497 return ParseMetadataListValue(ID, PFS); 2498 2499 // Standalone metadata reference 2500 // !42 2501 if (Lex.getKind() == lltok::APSInt) { 2502 if (ParseMDNodeID(ID.MDNodeVal)) return true; 2503 ID.Kind = ValID::t_MDNode; 2504 return false; 2505 } 2506 2507 // MDString: 2508 // ::= '!' STRINGCONSTANT 2509 if (ParseMDString(ID.MDStringVal)) return true; 2510 ID.Kind = ValID::t_MDString; 2511 return false; 2512} 2513 2514 2515//===----------------------------------------------------------------------===// 2516// Function Parsing. 2517//===----------------------------------------------------------------------===// 2518 2519bool LLParser::ConvertValIDToValue(Type *Ty, ValID &ID, Value *&V, 2520 PerFunctionState *PFS) { 2521 if (Ty->isFunctionTy()) 2522 return Error(ID.Loc, "functions are not values, refer to them as pointers"); 2523 2524 switch (ID.Kind) { 2525 case ValID::t_LocalID: 2526 if (!PFS) return Error(ID.Loc, "invalid use of function-local name"); 2527 V = PFS->GetVal(ID.UIntVal, Ty, ID.Loc); 2528 return (V == 0); 2529 case ValID::t_LocalName: 2530 if (!PFS) return Error(ID.Loc, "invalid use of function-local name"); 2531 V = PFS->GetVal(ID.StrVal, Ty, ID.Loc); 2532 return (V == 0); 2533 case ValID::t_InlineAsm: { 2534 PointerType *PTy = dyn_cast<PointerType>(Ty); 2535 FunctionType *FTy = 2536 PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : 0; 2537 if (!FTy || !InlineAsm::Verify(FTy, ID.StrVal2)) 2538 return Error(ID.Loc, "invalid type for inline asm constraint string"); 2539 V = InlineAsm::get(FTy, ID.StrVal, ID.StrVal2, ID.UIntVal&1, 2540 (ID.UIntVal>>1)&1, (InlineAsm::AsmDialect(ID.UIntVal>>2))); 2541 return false; 2542 } 2543 case ValID::t_MDNode: 2544 if (!Ty->isMetadataTy()) 2545 return Error(ID.Loc, "metadata value must have metadata type"); 2546 V = ID.MDNodeVal; 2547 return false; 2548 case ValID::t_MDString: 2549 if (!Ty->isMetadataTy()) 2550 return Error(ID.Loc, "metadata value must have metadata type"); 2551 V = ID.MDStringVal; 2552 return false; 2553 case ValID::t_GlobalName: 2554 V = GetGlobalVal(ID.StrVal, Ty, ID.Loc); 2555 return V == 0; 2556 case ValID::t_GlobalID: 2557 V = GetGlobalVal(ID.UIntVal, Ty, ID.Loc); 2558 return V == 0; 2559 case ValID::t_APSInt: 2560 if (!Ty->isIntegerTy()) 2561 return Error(ID.Loc, "integer constant must have integer type"); 2562 ID.APSIntVal = ID.APSIntVal.extOrTrunc(Ty->getPrimitiveSizeInBits()); 2563 V = ConstantInt::get(Context, ID.APSIntVal); 2564 return false; 2565 case ValID::t_APFloat: 2566 if (!Ty->isFloatingPointTy() || 2567 !ConstantFP::isValueValidForType(Ty, ID.APFloatVal)) 2568 return Error(ID.Loc, "floating point constant invalid for type"); 2569 2570 // The lexer has no type info, so builds all half, float, and double FP 2571 // constants as double. Fix this here. Long double does not need this. 2572 if (&ID.APFloatVal.getSemantics() == &APFloat::IEEEdouble) { 2573 bool Ignored; 2574 if (Ty->isHalfTy()) 2575 ID.APFloatVal.convert(APFloat::IEEEhalf, APFloat::rmNearestTiesToEven, 2576 &Ignored); 2577 else if (Ty->isFloatTy()) 2578 ID.APFloatVal.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, 2579 &Ignored); 2580 } 2581 V = ConstantFP::get(Context, ID.APFloatVal); 2582 2583 if (V->getType() != Ty) 2584 return Error(ID.Loc, "floating point constant does not have type '" + 2585 getTypeString(Ty) + "'"); 2586 2587 return false; 2588 case ValID::t_Null: 2589 if (!Ty->isPointerTy()) 2590 return Error(ID.Loc, "null must be a pointer type"); 2591 V = ConstantPointerNull::get(cast<PointerType>(Ty)); 2592 return false; 2593 case ValID::t_Undef: 2594 // FIXME: LabelTy should not be a first-class type. 2595 if (!Ty->isFirstClassType() || Ty->isLabelTy()) 2596 return Error(ID.Loc, "invalid type for undef constant"); 2597 V = UndefValue::get(Ty); 2598 return false; 2599 case ValID::t_EmptyArray: 2600 if (!Ty->isArrayTy() || cast<ArrayType>(Ty)->getNumElements() != 0) 2601 return Error(ID.Loc, "invalid empty array initializer"); 2602 V = UndefValue::get(Ty); 2603 return false; 2604 case ValID::t_Zero: 2605 // FIXME: LabelTy should not be a first-class type. 2606 if (!Ty->isFirstClassType() || Ty->isLabelTy()) 2607 return Error(ID.Loc, "invalid type for null constant"); 2608 V = Constant::getNullValue(Ty); 2609 return false; 2610 case ValID::t_Constant: 2611 if (ID.ConstantVal->getType() != Ty) 2612 return Error(ID.Loc, "constant expression type mismatch"); 2613 2614 V = ID.ConstantVal; 2615 return false; 2616 case ValID::t_ConstantStruct: 2617 case ValID::t_PackedConstantStruct: 2618 if (StructType *ST = dyn_cast<StructType>(Ty)) { 2619 if (ST->getNumElements() != ID.UIntVal) 2620 return Error(ID.Loc, 2621 "initializer with struct type has wrong # elements"); 2622 if (ST->isPacked() != (ID.Kind == ValID::t_PackedConstantStruct)) 2623 return Error(ID.Loc, "packed'ness of initializer and type don't match"); 2624 2625 // Verify that the elements are compatible with the structtype. 2626 for (unsigned i = 0, e = ID.UIntVal; i != e; ++i) 2627 if (ID.ConstantStructElts[i]->getType() != ST->getElementType(i)) 2628 return Error(ID.Loc, "element " + Twine(i) + 2629 " of struct initializer doesn't match struct element type"); 2630 2631 V = ConstantStruct::get(ST, makeArrayRef(ID.ConstantStructElts, 2632 ID.UIntVal)); 2633 } else 2634 return Error(ID.Loc, "constant expression type mismatch"); 2635 return false; 2636 } 2637 llvm_unreachable("Invalid ValID"); 2638} 2639 2640bool LLParser::ParseValue(Type *Ty, Value *&V, PerFunctionState *PFS) { 2641 V = 0; 2642 ValID ID; 2643 return ParseValID(ID, PFS) || 2644 ConvertValIDToValue(Ty, ID, V, PFS); 2645} 2646 2647bool LLParser::ParseTypeAndValue(Value *&V, PerFunctionState *PFS) { 2648 Type *Ty = 0; 2649 return ParseType(Ty) || 2650 ParseValue(Ty, V, PFS); 2651} 2652 2653bool LLParser::ParseTypeAndBasicBlock(BasicBlock *&BB, LocTy &Loc, 2654 PerFunctionState &PFS) { 2655 Value *V; 2656 Loc = Lex.getLoc(); 2657 if (ParseTypeAndValue(V, PFS)) return true; 2658 if (!isa<BasicBlock>(V)) 2659 return Error(Loc, "expected a basic block"); 2660 BB = cast<BasicBlock>(V); 2661 return false; 2662} 2663 2664 2665/// FunctionHeader 2666/// ::= OptionalLinkage OptionalVisibility OptionalCallingConv OptRetAttrs 2667/// OptUnnamedAddr Type GlobalName '(' ArgList ')' OptFuncAttrs OptSection 2668/// OptionalAlign OptGC 2669bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) { 2670 // Parse the linkage. 2671 LocTy LinkageLoc = Lex.getLoc(); 2672 unsigned Linkage; 2673 2674 unsigned Visibility; 2675 Attributes::Builder RetAttrs; 2676 CallingConv::ID CC; 2677 Type *RetType = 0; 2678 LocTy RetTypeLoc = Lex.getLoc(); 2679 if (ParseOptionalLinkage(Linkage) || 2680 ParseOptionalVisibility(Visibility) || 2681 ParseOptionalCallingConv(CC) || 2682 ParseOptionalAttrs(RetAttrs, 1) || 2683 ParseType(RetType, RetTypeLoc, true /*void allowed*/)) 2684 return true; 2685 2686 // Verify that the linkage is ok. 2687 switch ((GlobalValue::LinkageTypes)Linkage) { 2688 case GlobalValue::ExternalLinkage: 2689 break; // always ok. 2690 case GlobalValue::DLLImportLinkage: 2691 case GlobalValue::ExternalWeakLinkage: 2692 if (isDefine) 2693 return Error(LinkageLoc, "invalid linkage for function definition"); 2694 break; 2695 case GlobalValue::PrivateLinkage: 2696 case GlobalValue::LinkerPrivateLinkage: 2697 case GlobalValue::LinkerPrivateWeakLinkage: 2698 case GlobalValue::InternalLinkage: 2699 case GlobalValue::AvailableExternallyLinkage: 2700 case GlobalValue::LinkOnceAnyLinkage: 2701 case GlobalValue::LinkOnceODRLinkage: 2702 case GlobalValue::LinkOnceODRAutoHideLinkage: 2703 case GlobalValue::WeakAnyLinkage: 2704 case GlobalValue::WeakODRLinkage: 2705 case GlobalValue::DLLExportLinkage: 2706 if (!isDefine) 2707 return Error(LinkageLoc, "invalid linkage for function declaration"); 2708 break; 2709 case GlobalValue::AppendingLinkage: 2710 case GlobalValue::CommonLinkage: 2711 return Error(LinkageLoc, "invalid function linkage type"); 2712 } 2713 2714 if (!FunctionType::isValidReturnType(RetType)) 2715 return Error(RetTypeLoc, "invalid function return type"); 2716 2717 LocTy NameLoc = Lex.getLoc(); 2718 2719 std::string FunctionName; 2720 if (Lex.getKind() == lltok::GlobalVar) { 2721 FunctionName = Lex.getStrVal(); 2722 } else if (Lex.getKind() == lltok::GlobalID) { // @42 is ok. 2723 unsigned NameID = Lex.getUIntVal(); 2724 2725 if (NameID != NumberedVals.size()) 2726 return TokError("function expected to be numbered '%" + 2727 Twine(NumberedVals.size()) + "'"); 2728 } else { 2729 return TokError("expected function name"); 2730 } 2731 2732 Lex.Lex(); 2733 2734 if (Lex.getKind() != lltok::lparen) 2735 return TokError("expected '(' in function argument list"); 2736 2737 SmallVector<ArgInfo, 8> ArgList; 2738 bool isVarArg; 2739 Attributes::Builder FuncAttrs; 2740 std::string Section; 2741 unsigned Alignment; 2742 std::string GC; 2743 bool UnnamedAddr; 2744 LocTy UnnamedAddrLoc; 2745 2746 if (ParseArgumentList(ArgList, isVarArg) || 2747 ParseOptionalToken(lltok::kw_unnamed_addr, UnnamedAddr, 2748 &UnnamedAddrLoc) || 2749 ParseOptionalAttrs(FuncAttrs, 2) || 2750 (EatIfPresent(lltok::kw_section) && 2751 ParseStringConstant(Section)) || 2752 ParseOptionalAlignment(Alignment) || 2753 (EatIfPresent(lltok::kw_gc) && 2754 ParseStringConstant(GC))) 2755 return true; 2756 2757 // If the alignment was parsed as an attribute, move to the alignment field. 2758 if (FuncAttrs.hasAlignmentAttr()) { 2759 Alignment = FuncAttrs.getAlignment(); 2760 FuncAttrs.removeAttribute(Attributes::Alignment); 2761 } 2762 2763 // Okay, if we got here, the function is syntactically valid. Convert types 2764 // and do semantic checks. 2765 std::vector<Type*> ParamTypeList; 2766 SmallVector<AttributeWithIndex, 8> Attrs; 2767 2768 if (RetAttrs.hasAttributes()) 2769 Attrs.push_back(AttributeWithIndex::get(0, Attributes::get(RetAttrs))); 2770 2771 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 2772 ParamTypeList.push_back(ArgList[i].Ty); 2773 if (ArgList[i].Attrs.hasAttributes()) 2774 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 2775 } 2776 2777 if (FuncAttrs.hasAttributes()) 2778 Attrs.push_back(AttributeWithIndex::get(~0, Attributes::get(FuncAttrs))); 2779 2780 AttrListPtr PAL = AttrListPtr::get(Attrs); 2781 2782 if (PAL.getParamAttributes(1).hasAttribute(Attributes::StructRet) && 2783 !RetType->isVoidTy()) 2784 return Error(RetTypeLoc, "functions with 'sret' argument must return void"); 2785 2786 FunctionType *FT = 2787 FunctionType::get(RetType, ParamTypeList, isVarArg); 2788 PointerType *PFT = PointerType::getUnqual(FT); 2789 2790 Fn = 0; 2791 if (!FunctionName.empty()) { 2792 // If this was a definition of a forward reference, remove the definition 2793 // from the forward reference table and fill in the forward ref. 2794 std::map<std::string, std::pair<GlobalValue*, LocTy> >::iterator FRVI = 2795 ForwardRefVals.find(FunctionName); 2796 if (FRVI != ForwardRefVals.end()) { 2797 Fn = M->getFunction(FunctionName); 2798 if (!Fn) 2799 return Error(FRVI->second.second, "invalid forward reference to " 2800 "function as global value!"); 2801 if (Fn->getType() != PFT) 2802 return Error(FRVI->second.second, "invalid forward reference to " 2803 "function '" + FunctionName + "' with wrong type!"); 2804 2805 ForwardRefVals.erase(FRVI); 2806 } else if ((Fn = M->getFunction(FunctionName))) { 2807 // Reject redefinitions. 2808 return Error(NameLoc, "invalid redefinition of function '" + 2809 FunctionName + "'"); 2810 } else if (M->getNamedValue(FunctionName)) { 2811 return Error(NameLoc, "redefinition of function '@" + FunctionName + "'"); 2812 } 2813 2814 } else { 2815 // If this is a definition of a forward referenced function, make sure the 2816 // types agree. 2817 std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator I 2818 = ForwardRefValIDs.find(NumberedVals.size()); 2819 if (I != ForwardRefValIDs.end()) { 2820 Fn = cast<Function>(I->second.first); 2821 if (Fn->getType() != PFT) 2822 return Error(NameLoc, "type of definition and forward reference of '@" + 2823 Twine(NumberedVals.size()) + "' disagree"); 2824 ForwardRefValIDs.erase(I); 2825 } 2826 } 2827 2828 if (Fn == 0) 2829 Fn = Function::Create(FT, GlobalValue::ExternalLinkage, FunctionName, M); 2830 else // Move the forward-reference to the correct spot in the module. 2831 M->getFunctionList().splice(M->end(), M->getFunctionList(), Fn); 2832 2833 if (FunctionName.empty()) 2834 NumberedVals.push_back(Fn); 2835 2836 Fn->setLinkage((GlobalValue::LinkageTypes)Linkage); 2837 Fn->setVisibility((GlobalValue::VisibilityTypes)Visibility); 2838 Fn->setCallingConv(CC); 2839 Fn->setAttributes(PAL); 2840 Fn->setUnnamedAddr(UnnamedAddr); 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 the argument has a name, insert it into the argument symbol table. 2849 if (ArgList[i].Name.empty()) continue; 2850 2851 // Set the name, if it conflicted, it will be auto-renamed. 2852 ArgIt->setName(ArgList[i].Name); 2853 2854 if (ArgIt->getName() != ArgList[i].Name) 2855 return Error(ArgList[i].Loc, "redefinition of argument '%" + 2856 ArgList[i].Name + "'"); 2857 } 2858 2859 return false; 2860} 2861 2862 2863/// ParseFunctionBody 2864/// ::= '{' BasicBlock+ '}' 2865/// 2866bool LLParser::ParseFunctionBody(Function &Fn) { 2867 if (Lex.getKind() != lltok::lbrace) 2868 return TokError("expected '{' in function body"); 2869 Lex.Lex(); // eat the {. 2870 2871 int FunctionNumber = -1; 2872 if (!Fn.hasName()) FunctionNumber = NumberedVals.size()-1; 2873 2874 PerFunctionState PFS(*this, Fn, FunctionNumber); 2875 2876 // We need at least one basic block. 2877 if (Lex.getKind() == lltok::rbrace) 2878 return TokError("function body requires at least one basic block"); 2879 2880 while (Lex.getKind() != lltok::rbrace) 2881 if (ParseBasicBlock(PFS)) return true; 2882 2883 // Eat the }. 2884 Lex.Lex(); 2885 2886 // Verify function is ok. 2887 return PFS.FinishFunction(); 2888} 2889 2890/// ParseBasicBlock 2891/// ::= LabelStr? Instruction* 2892bool LLParser::ParseBasicBlock(PerFunctionState &PFS) { 2893 // If this basic block starts out with a name, remember it. 2894 std::string Name; 2895 LocTy NameLoc = Lex.getLoc(); 2896 if (Lex.getKind() == lltok::LabelStr) { 2897 Name = Lex.getStrVal(); 2898 Lex.Lex(); 2899 } 2900 2901 BasicBlock *BB = PFS.DefineBB(Name, NameLoc); 2902 if (BB == 0) return true; 2903 2904 std::string NameStr; 2905 2906 // Parse the instructions in this block until we get a terminator. 2907 Instruction *Inst; 2908 SmallVector<std::pair<unsigned, MDNode *>, 4> MetadataOnInst; 2909 do { 2910 // This instruction may have three possibilities for a name: a) none 2911 // specified, b) name specified "%foo =", c) number specified: "%4 =". 2912 LocTy NameLoc = Lex.getLoc(); 2913 int NameID = -1; 2914 NameStr = ""; 2915 2916 if (Lex.getKind() == lltok::LocalVarID) { 2917 NameID = Lex.getUIntVal(); 2918 Lex.Lex(); 2919 if (ParseToken(lltok::equal, "expected '=' after instruction id")) 2920 return true; 2921 } else if (Lex.getKind() == lltok::LocalVar) { 2922 NameStr = Lex.getStrVal(); 2923 Lex.Lex(); 2924 if (ParseToken(lltok::equal, "expected '=' after instruction name")) 2925 return true; 2926 } 2927 2928 switch (ParseInstruction(Inst, BB, PFS)) { 2929 default: llvm_unreachable("Unknown ParseInstruction result!"); 2930 case InstError: return true; 2931 case InstNormal: 2932 BB->getInstList().push_back(Inst); 2933 2934 // With a normal result, we check to see if the instruction is followed by 2935 // a comma and metadata. 2936 if (EatIfPresent(lltok::comma)) 2937 if (ParseInstructionMetadata(Inst, &PFS)) 2938 return true; 2939 break; 2940 case InstExtraComma: 2941 BB->getInstList().push_back(Inst); 2942 2943 // If the instruction parser ate an extra comma at the end of it, it 2944 // *must* be followed by metadata. 2945 if (ParseInstructionMetadata(Inst, &PFS)) 2946 return true; 2947 break; 2948 } 2949 2950 // Set the name on the instruction. 2951 if (PFS.SetInstName(NameID, NameStr, NameLoc, Inst)) return true; 2952 } while (!isa<TerminatorInst>(Inst)); 2953 2954 return false; 2955} 2956 2957//===----------------------------------------------------------------------===// 2958// Instruction Parsing. 2959//===----------------------------------------------------------------------===// 2960 2961/// ParseInstruction - Parse one of the many different instructions. 2962/// 2963int LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB, 2964 PerFunctionState &PFS) { 2965 lltok::Kind Token = Lex.getKind(); 2966 if (Token == lltok::Eof) 2967 return TokError("found end of file when expecting more instructions"); 2968 LocTy Loc = Lex.getLoc(); 2969 unsigned KeywordVal = Lex.getUIntVal(); 2970 Lex.Lex(); // Eat the keyword. 2971 2972 switch (Token) { 2973 default: return Error(Loc, "expected instruction opcode"); 2974 // Terminator Instructions. 2975 case lltok::kw_unreachable: Inst = new UnreachableInst(Context); return false; 2976 case lltok::kw_ret: return ParseRet(Inst, BB, PFS); 2977 case lltok::kw_br: return ParseBr(Inst, PFS); 2978 case lltok::kw_switch: return ParseSwitch(Inst, PFS); 2979 case lltok::kw_indirectbr: return ParseIndirectBr(Inst, PFS); 2980 case lltok::kw_invoke: return ParseInvoke(Inst, PFS); 2981 case lltok::kw_resume: return ParseResume(Inst, PFS); 2982 // Binary Operators. 2983 case lltok::kw_add: 2984 case lltok::kw_sub: 2985 case lltok::kw_mul: 2986 case lltok::kw_shl: { 2987 bool NUW = EatIfPresent(lltok::kw_nuw); 2988 bool NSW = EatIfPresent(lltok::kw_nsw); 2989 if (!NUW) NUW = EatIfPresent(lltok::kw_nuw); 2990 2991 if (ParseArithmetic(Inst, PFS, KeywordVal, 1)) return true; 2992 2993 if (NUW) cast<BinaryOperator>(Inst)->setHasNoUnsignedWrap(true); 2994 if (NSW) cast<BinaryOperator>(Inst)->setHasNoSignedWrap(true); 2995 return false; 2996 } 2997 case lltok::kw_fadd: 2998 case lltok::kw_fsub: 2999 case lltok::kw_fmul: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 3000 3001 case lltok::kw_sdiv: 3002 case lltok::kw_udiv: 3003 case lltok::kw_lshr: 3004 case lltok::kw_ashr: { 3005 bool Exact = EatIfPresent(lltok::kw_exact); 3006 3007 if (ParseArithmetic(Inst, PFS, KeywordVal, 1)) return true; 3008 if (Exact) cast<BinaryOperator>(Inst)->setIsExact(true); 3009 return false; 3010 } 3011 3012 case lltok::kw_urem: 3013 case lltok::kw_srem: return ParseArithmetic(Inst, PFS, KeywordVal, 1); 3014 case lltok::kw_fdiv: 3015 case lltok::kw_frem: return ParseArithmetic(Inst, PFS, KeywordVal, 2); 3016 case lltok::kw_and: 3017 case lltok::kw_or: 3018 case lltok::kw_xor: return ParseLogical(Inst, PFS, KeywordVal); 3019 case lltok::kw_icmp: 3020 case lltok::kw_fcmp: return ParseCompare(Inst, PFS, KeywordVal); 3021 // Casts. 3022 case lltok::kw_trunc: 3023 case lltok::kw_zext: 3024 case lltok::kw_sext: 3025 case lltok::kw_fptrunc: 3026 case lltok::kw_fpext: 3027 case lltok::kw_bitcast: 3028 case lltok::kw_uitofp: 3029 case lltok::kw_sitofp: 3030 case lltok::kw_fptoui: 3031 case lltok::kw_fptosi: 3032 case lltok::kw_inttoptr: 3033 case lltok::kw_ptrtoint: return ParseCast(Inst, PFS, KeywordVal); 3034 // Other. 3035 case lltok::kw_select: return ParseSelect(Inst, PFS); 3036 case lltok::kw_va_arg: return ParseVA_Arg(Inst, PFS); 3037 case lltok::kw_extractelement: return ParseExtractElement(Inst, PFS); 3038 case lltok::kw_insertelement: return ParseInsertElement(Inst, PFS); 3039 case lltok::kw_shufflevector: return ParseShuffleVector(Inst, PFS); 3040 case lltok::kw_phi: return ParsePHI(Inst, PFS); 3041 case lltok::kw_landingpad: return ParseLandingPad(Inst, PFS); 3042 case lltok::kw_call: return ParseCall(Inst, PFS, false); 3043 case lltok::kw_tail: return ParseCall(Inst, PFS, true); 3044 // Memory. 3045 case lltok::kw_alloca: return ParseAlloc(Inst, PFS); 3046 case lltok::kw_load: return ParseLoad(Inst, PFS); 3047 case lltok::kw_store: return ParseStore(Inst, PFS); 3048 case lltok::kw_cmpxchg: return ParseCmpXchg(Inst, PFS); 3049 case lltok::kw_atomicrmw: return ParseAtomicRMW(Inst, PFS); 3050 case lltok::kw_fence: return ParseFence(Inst, PFS); 3051 case lltok::kw_getelementptr: return ParseGetElementPtr(Inst, PFS); 3052 case lltok::kw_extractvalue: return ParseExtractValue(Inst, PFS); 3053 case lltok::kw_insertvalue: return ParseInsertValue(Inst, PFS); 3054 } 3055} 3056 3057/// ParseCmpPredicate - Parse an integer or fp predicate, based on Kind. 3058bool LLParser::ParseCmpPredicate(unsigned &P, unsigned Opc) { 3059 if (Opc == Instruction::FCmp) { 3060 switch (Lex.getKind()) { 3061 default: TokError("expected fcmp predicate (e.g. 'oeq')"); 3062 case lltok::kw_oeq: P = CmpInst::FCMP_OEQ; break; 3063 case lltok::kw_one: P = CmpInst::FCMP_ONE; break; 3064 case lltok::kw_olt: P = CmpInst::FCMP_OLT; break; 3065 case lltok::kw_ogt: P = CmpInst::FCMP_OGT; break; 3066 case lltok::kw_ole: P = CmpInst::FCMP_OLE; break; 3067 case lltok::kw_oge: P = CmpInst::FCMP_OGE; break; 3068 case lltok::kw_ord: P = CmpInst::FCMP_ORD; break; 3069 case lltok::kw_uno: P = CmpInst::FCMP_UNO; break; 3070 case lltok::kw_ueq: P = CmpInst::FCMP_UEQ; break; 3071 case lltok::kw_une: P = CmpInst::FCMP_UNE; break; 3072 case lltok::kw_ult: P = CmpInst::FCMP_ULT; break; 3073 case lltok::kw_ugt: P = CmpInst::FCMP_UGT; break; 3074 case lltok::kw_ule: P = CmpInst::FCMP_ULE; break; 3075 case lltok::kw_uge: P = CmpInst::FCMP_UGE; break; 3076 case lltok::kw_true: P = CmpInst::FCMP_TRUE; break; 3077 case lltok::kw_false: P = CmpInst::FCMP_FALSE; break; 3078 } 3079 } else { 3080 switch (Lex.getKind()) { 3081 default: TokError("expected icmp predicate (e.g. 'eq')"); 3082 case lltok::kw_eq: P = CmpInst::ICMP_EQ; break; 3083 case lltok::kw_ne: P = CmpInst::ICMP_NE; break; 3084 case lltok::kw_slt: P = CmpInst::ICMP_SLT; break; 3085 case lltok::kw_sgt: P = CmpInst::ICMP_SGT; break; 3086 case lltok::kw_sle: P = CmpInst::ICMP_SLE; break; 3087 case lltok::kw_sge: P = CmpInst::ICMP_SGE; break; 3088 case lltok::kw_ult: P = CmpInst::ICMP_ULT; break; 3089 case lltok::kw_ugt: P = CmpInst::ICMP_UGT; break; 3090 case lltok::kw_ule: P = CmpInst::ICMP_ULE; break; 3091 case lltok::kw_uge: P = CmpInst::ICMP_UGE; break; 3092 } 3093 } 3094 Lex.Lex(); 3095 return false; 3096} 3097 3098//===----------------------------------------------------------------------===// 3099// Terminator Instructions. 3100//===----------------------------------------------------------------------===// 3101 3102/// ParseRet - Parse a return instruction. 3103/// ::= 'ret' void (',' !dbg, !1)* 3104/// ::= 'ret' TypeAndValue (',' !dbg, !1)* 3105bool LLParser::ParseRet(Instruction *&Inst, BasicBlock *BB, 3106 PerFunctionState &PFS) { 3107 SMLoc TypeLoc = Lex.getLoc(); 3108 Type *Ty = 0; 3109 if (ParseType(Ty, true /*void allowed*/)) return true; 3110 3111 Type *ResType = PFS.getFunction().getReturnType(); 3112 3113 if (Ty->isVoidTy()) { 3114 if (!ResType->isVoidTy()) 3115 return Error(TypeLoc, "value doesn't match function result type '" + 3116 getTypeString(ResType) + "'"); 3117 3118 Inst = ReturnInst::Create(Context); 3119 return false; 3120 } 3121 3122 Value *RV; 3123 if (ParseValue(Ty, RV, PFS)) return true; 3124 3125 if (ResType != RV->getType()) 3126 return Error(TypeLoc, "value doesn't match function result type '" + 3127 getTypeString(ResType) + "'"); 3128 3129 Inst = ReturnInst::Create(Context, RV); 3130 return false; 3131} 3132 3133 3134/// ParseBr 3135/// ::= 'br' TypeAndValue 3136/// ::= 'br' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3137bool LLParser::ParseBr(Instruction *&Inst, PerFunctionState &PFS) { 3138 LocTy Loc, Loc2; 3139 Value *Op0; 3140 BasicBlock *Op1, *Op2; 3141 if (ParseTypeAndValue(Op0, Loc, PFS)) return true; 3142 3143 if (BasicBlock *BB = dyn_cast<BasicBlock>(Op0)) { 3144 Inst = BranchInst::Create(BB); 3145 return false; 3146 } 3147 3148 if (Op0->getType() != Type::getInt1Ty(Context)) 3149 return Error(Loc, "branch condition must have 'i1' type"); 3150 3151 if (ParseToken(lltok::comma, "expected ',' after branch condition") || 3152 ParseTypeAndBasicBlock(Op1, Loc, PFS) || 3153 ParseToken(lltok::comma, "expected ',' after true destination") || 3154 ParseTypeAndBasicBlock(Op2, Loc2, PFS)) 3155 return true; 3156 3157 Inst = BranchInst::Create(Op1, Op2, Op0); 3158 return false; 3159} 3160 3161/// ParseSwitch 3162/// Instruction 3163/// ::= 'switch' TypeAndValue ',' TypeAndValue '[' JumpTable ']' 3164/// JumpTable 3165/// ::= (TypeAndValue ',' TypeAndValue)* 3166bool LLParser::ParseSwitch(Instruction *&Inst, PerFunctionState &PFS) { 3167 LocTy CondLoc, BBLoc; 3168 Value *Cond; 3169 BasicBlock *DefaultBB; 3170 if (ParseTypeAndValue(Cond, CondLoc, PFS) || 3171 ParseToken(lltok::comma, "expected ',' after switch condition") || 3172 ParseTypeAndBasicBlock(DefaultBB, BBLoc, PFS) || 3173 ParseToken(lltok::lsquare, "expected '[' with switch table")) 3174 return true; 3175 3176 if (!Cond->getType()->isIntegerTy()) 3177 return Error(CondLoc, "switch condition must have integer type"); 3178 3179 // Parse the jump table pairs. 3180 SmallPtrSet<Value*, 32> SeenCases; 3181 SmallVector<std::pair<ConstantInt*, BasicBlock*>, 32> Table; 3182 while (Lex.getKind() != lltok::rsquare) { 3183 Value *Constant; 3184 BasicBlock *DestBB; 3185 3186 if (ParseTypeAndValue(Constant, CondLoc, PFS) || 3187 ParseToken(lltok::comma, "expected ',' after case value") || 3188 ParseTypeAndBasicBlock(DestBB, PFS)) 3189 return true; 3190 3191 if (!SeenCases.insert(Constant)) 3192 return Error(CondLoc, "duplicate case value in switch"); 3193 if (!isa<ConstantInt>(Constant)) 3194 return Error(CondLoc, "case value is not a constant integer"); 3195 3196 Table.push_back(std::make_pair(cast<ConstantInt>(Constant), DestBB)); 3197 } 3198 3199 Lex.Lex(); // Eat the ']'. 3200 3201 SwitchInst *SI = SwitchInst::Create(Cond, DefaultBB, Table.size()); 3202 for (unsigned i = 0, e = Table.size(); i != e; ++i) 3203 SI->addCase(Table[i].first, Table[i].second); 3204 Inst = SI; 3205 return false; 3206} 3207 3208/// ParseIndirectBr 3209/// Instruction 3210/// ::= 'indirectbr' TypeAndValue ',' '[' LabelList ']' 3211bool LLParser::ParseIndirectBr(Instruction *&Inst, PerFunctionState &PFS) { 3212 LocTy AddrLoc; 3213 Value *Address; 3214 if (ParseTypeAndValue(Address, AddrLoc, PFS) || 3215 ParseToken(lltok::comma, "expected ',' after indirectbr address") || 3216 ParseToken(lltok::lsquare, "expected '[' with indirectbr")) 3217 return true; 3218 3219 if (!Address->getType()->isPointerTy()) 3220 return Error(AddrLoc, "indirectbr address must have pointer type"); 3221 3222 // Parse the destination list. 3223 SmallVector<BasicBlock*, 16> DestList; 3224 3225 if (Lex.getKind() != lltok::rsquare) { 3226 BasicBlock *DestBB; 3227 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3228 return true; 3229 DestList.push_back(DestBB); 3230 3231 while (EatIfPresent(lltok::comma)) { 3232 if (ParseTypeAndBasicBlock(DestBB, PFS)) 3233 return true; 3234 DestList.push_back(DestBB); 3235 } 3236 } 3237 3238 if (ParseToken(lltok::rsquare, "expected ']' at end of block list")) 3239 return true; 3240 3241 IndirectBrInst *IBI = IndirectBrInst::Create(Address, DestList.size()); 3242 for (unsigned i = 0, e = DestList.size(); i != e; ++i) 3243 IBI->addDestination(DestList[i]); 3244 Inst = IBI; 3245 return false; 3246} 3247 3248 3249/// ParseInvoke 3250/// ::= 'invoke' OptionalCallingConv OptionalAttrs Type Value ParamList 3251/// OptionalAttrs 'to' TypeAndValue 'unwind' TypeAndValue 3252bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) { 3253 LocTy CallLoc = Lex.getLoc(); 3254 Attributes::Builder RetAttrs, FnAttrs; 3255 CallingConv::ID CC; 3256 Type *RetType = 0; 3257 LocTy RetTypeLoc; 3258 ValID CalleeID; 3259 SmallVector<ParamInfo, 16> ArgList; 3260 3261 BasicBlock *NormalBB, *UnwindBB; 3262 if (ParseOptionalCallingConv(CC) || 3263 ParseOptionalAttrs(RetAttrs, 1) || 3264 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3265 ParseValID(CalleeID) || 3266 ParseParameterList(ArgList, PFS) || 3267 ParseOptionalAttrs(FnAttrs, 2) || 3268 ParseToken(lltok::kw_to, "expected 'to' in invoke") || 3269 ParseTypeAndBasicBlock(NormalBB, PFS) || 3270 ParseToken(lltok::kw_unwind, "expected 'unwind' in invoke") || 3271 ParseTypeAndBasicBlock(UnwindBB, PFS)) 3272 return true; 3273 3274 // If RetType is a non-function pointer type, then this is the short syntax 3275 // for the call, which means that RetType is just the return type. Infer the 3276 // rest of the function argument types from the arguments that are present. 3277 PointerType *PFTy = 0; 3278 FunctionType *Ty = 0; 3279 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3280 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3281 // Pull out the types of all of the arguments... 3282 std::vector<Type*> ParamTypes; 3283 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3284 ParamTypes.push_back(ArgList[i].V->getType()); 3285 3286 if (!FunctionType::isValidReturnType(RetType)) 3287 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3288 3289 Ty = FunctionType::get(RetType, ParamTypes, false); 3290 PFTy = PointerType::getUnqual(Ty); 3291 } 3292 3293 // Look up the callee. 3294 Value *Callee; 3295 if (ConvertValIDToValue(PFTy, CalleeID, Callee, &PFS)) return true; 3296 3297 // Set up the Attributes for the function. 3298 SmallVector<AttributeWithIndex, 8> Attrs; 3299 if (RetAttrs.hasAttributes()) 3300 Attrs.push_back(AttributeWithIndex::get(0, Attributes::get(RetAttrs))); 3301 3302 SmallVector<Value*, 8> Args; 3303 3304 // Loop through FunctionType's arguments and ensure they are specified 3305 // correctly. Also, gather any parameter attributes. 3306 FunctionType::param_iterator I = Ty->param_begin(); 3307 FunctionType::param_iterator E = Ty->param_end(); 3308 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3309 Type *ExpectedTy = 0; 3310 if (I != E) { 3311 ExpectedTy = *I++; 3312 } else if (!Ty->isVarArg()) { 3313 return Error(ArgList[i].Loc, "too many arguments specified"); 3314 } 3315 3316 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3317 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3318 getTypeString(ExpectedTy) + "'"); 3319 Args.push_back(ArgList[i].V); 3320 if (ArgList[i].Attrs.hasAttributes()) 3321 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3322 } 3323 3324 if (I != E) 3325 return Error(CallLoc, "not enough parameters specified for call"); 3326 3327 if (FnAttrs.hasAttributes()) 3328 Attrs.push_back(AttributeWithIndex::get(~0, Attributes::get(FnAttrs))); 3329 3330 // Finish off the Attributes and check them 3331 AttrListPtr PAL = AttrListPtr::get(Attrs); 3332 3333 InvokeInst *II = InvokeInst::Create(Callee, NormalBB, UnwindBB, Args); 3334 II->setCallingConv(CC); 3335 II->setAttributes(PAL); 3336 Inst = II; 3337 return false; 3338} 3339 3340/// ParseResume 3341/// ::= 'resume' TypeAndValue 3342bool LLParser::ParseResume(Instruction *&Inst, PerFunctionState &PFS) { 3343 Value *Exn; LocTy ExnLoc; 3344 if (ParseTypeAndValue(Exn, ExnLoc, PFS)) 3345 return true; 3346 3347 ResumeInst *RI = ResumeInst::Create(Exn); 3348 Inst = RI; 3349 return false; 3350} 3351 3352//===----------------------------------------------------------------------===// 3353// Binary Operators. 3354//===----------------------------------------------------------------------===// 3355 3356/// ParseArithmetic 3357/// ::= ArithmeticOps TypeAndValue ',' Value 3358/// 3359/// If OperandType is 0, then any FP or integer operand is allowed. If it is 1, 3360/// then any integer operand is allowed, if it is 2, any fp operand is allowed. 3361bool LLParser::ParseArithmetic(Instruction *&Inst, PerFunctionState &PFS, 3362 unsigned Opc, unsigned OperandType) { 3363 LocTy Loc; Value *LHS, *RHS; 3364 if (ParseTypeAndValue(LHS, Loc, PFS) || 3365 ParseToken(lltok::comma, "expected ',' in arithmetic operation") || 3366 ParseValue(LHS->getType(), RHS, PFS)) 3367 return true; 3368 3369 bool Valid; 3370 switch (OperandType) { 3371 default: llvm_unreachable("Unknown operand type!"); 3372 case 0: // int or FP. 3373 Valid = LHS->getType()->isIntOrIntVectorTy() || 3374 LHS->getType()->isFPOrFPVectorTy(); 3375 break; 3376 case 1: Valid = LHS->getType()->isIntOrIntVectorTy(); break; 3377 case 2: Valid = LHS->getType()->isFPOrFPVectorTy(); break; 3378 } 3379 3380 if (!Valid) 3381 return Error(Loc, "invalid operand type for instruction"); 3382 3383 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3384 return false; 3385} 3386 3387/// ParseLogical 3388/// ::= ArithmeticOps TypeAndValue ',' Value { 3389bool LLParser::ParseLogical(Instruction *&Inst, PerFunctionState &PFS, 3390 unsigned Opc) { 3391 LocTy Loc; Value *LHS, *RHS; 3392 if (ParseTypeAndValue(LHS, Loc, PFS) || 3393 ParseToken(lltok::comma, "expected ',' in logical operation") || 3394 ParseValue(LHS->getType(), RHS, PFS)) 3395 return true; 3396 3397 if (!LHS->getType()->isIntOrIntVectorTy()) 3398 return Error(Loc,"instruction requires integer or integer vector operands"); 3399 3400 Inst = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS); 3401 return false; 3402} 3403 3404 3405/// ParseCompare 3406/// ::= 'icmp' IPredicates TypeAndValue ',' Value 3407/// ::= 'fcmp' FPredicates TypeAndValue ',' Value 3408bool LLParser::ParseCompare(Instruction *&Inst, PerFunctionState &PFS, 3409 unsigned Opc) { 3410 // Parse the integer/fp comparison predicate. 3411 LocTy Loc; 3412 unsigned Pred; 3413 Value *LHS, *RHS; 3414 if (ParseCmpPredicate(Pred, Opc) || 3415 ParseTypeAndValue(LHS, Loc, PFS) || 3416 ParseToken(lltok::comma, "expected ',' after compare value") || 3417 ParseValue(LHS->getType(), RHS, PFS)) 3418 return true; 3419 3420 if (Opc == Instruction::FCmp) { 3421 if (!LHS->getType()->isFPOrFPVectorTy()) 3422 return Error(Loc, "fcmp requires floating point operands"); 3423 Inst = new FCmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3424 } else { 3425 assert(Opc == Instruction::ICmp && "Unknown opcode for CmpInst!"); 3426 if (!LHS->getType()->isIntOrIntVectorTy() && 3427 !LHS->getType()->getScalarType()->isPointerTy()) 3428 return Error(Loc, "icmp requires integer operands"); 3429 Inst = new ICmpInst(CmpInst::Predicate(Pred), LHS, RHS); 3430 } 3431 return false; 3432} 3433 3434//===----------------------------------------------------------------------===// 3435// Other Instructions. 3436//===----------------------------------------------------------------------===// 3437 3438 3439/// ParseCast 3440/// ::= CastOpc TypeAndValue 'to' Type 3441bool LLParser::ParseCast(Instruction *&Inst, PerFunctionState &PFS, 3442 unsigned Opc) { 3443 LocTy Loc; 3444 Value *Op; 3445 Type *DestTy = 0; 3446 if (ParseTypeAndValue(Op, Loc, PFS) || 3447 ParseToken(lltok::kw_to, "expected 'to' after cast value") || 3448 ParseType(DestTy)) 3449 return true; 3450 3451 if (!CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy)) { 3452 CastInst::castIsValid((Instruction::CastOps)Opc, Op, DestTy); 3453 return Error(Loc, "invalid cast opcode for cast from '" + 3454 getTypeString(Op->getType()) + "' to '" + 3455 getTypeString(DestTy) + "'"); 3456 } 3457 Inst = CastInst::Create((Instruction::CastOps)Opc, Op, DestTy); 3458 return false; 3459} 3460 3461/// ParseSelect 3462/// ::= 'select' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3463bool LLParser::ParseSelect(Instruction *&Inst, PerFunctionState &PFS) { 3464 LocTy Loc; 3465 Value *Op0, *Op1, *Op2; 3466 if (ParseTypeAndValue(Op0, Loc, PFS) || 3467 ParseToken(lltok::comma, "expected ',' after select condition") || 3468 ParseTypeAndValue(Op1, PFS) || 3469 ParseToken(lltok::comma, "expected ',' after select value") || 3470 ParseTypeAndValue(Op2, PFS)) 3471 return true; 3472 3473 if (const char *Reason = SelectInst::areInvalidOperands(Op0, Op1, Op2)) 3474 return Error(Loc, Reason); 3475 3476 Inst = SelectInst::Create(Op0, Op1, Op2); 3477 return false; 3478} 3479 3480/// ParseVA_Arg 3481/// ::= 'va_arg' TypeAndValue ',' Type 3482bool LLParser::ParseVA_Arg(Instruction *&Inst, PerFunctionState &PFS) { 3483 Value *Op; 3484 Type *EltTy = 0; 3485 LocTy TypeLoc; 3486 if (ParseTypeAndValue(Op, PFS) || 3487 ParseToken(lltok::comma, "expected ',' after vaarg operand") || 3488 ParseType(EltTy, TypeLoc)) 3489 return true; 3490 3491 if (!EltTy->isFirstClassType()) 3492 return Error(TypeLoc, "va_arg requires operand with first class type"); 3493 3494 Inst = new VAArgInst(Op, EltTy); 3495 return false; 3496} 3497 3498/// ParseExtractElement 3499/// ::= 'extractelement' TypeAndValue ',' TypeAndValue 3500bool LLParser::ParseExtractElement(Instruction *&Inst, PerFunctionState &PFS) { 3501 LocTy Loc; 3502 Value *Op0, *Op1; 3503 if (ParseTypeAndValue(Op0, Loc, PFS) || 3504 ParseToken(lltok::comma, "expected ',' after extract value") || 3505 ParseTypeAndValue(Op1, PFS)) 3506 return true; 3507 3508 if (!ExtractElementInst::isValidOperands(Op0, Op1)) 3509 return Error(Loc, "invalid extractelement operands"); 3510 3511 Inst = ExtractElementInst::Create(Op0, Op1); 3512 return false; 3513} 3514 3515/// ParseInsertElement 3516/// ::= 'insertelement' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3517bool LLParser::ParseInsertElement(Instruction *&Inst, PerFunctionState &PFS) { 3518 LocTy Loc; 3519 Value *Op0, *Op1, *Op2; 3520 if (ParseTypeAndValue(Op0, Loc, PFS) || 3521 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3522 ParseTypeAndValue(Op1, PFS) || 3523 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3524 ParseTypeAndValue(Op2, PFS)) 3525 return true; 3526 3527 if (!InsertElementInst::isValidOperands(Op0, Op1, Op2)) 3528 return Error(Loc, "invalid insertelement operands"); 3529 3530 Inst = InsertElementInst::Create(Op0, Op1, Op2); 3531 return false; 3532} 3533 3534/// ParseShuffleVector 3535/// ::= 'shufflevector' TypeAndValue ',' TypeAndValue ',' TypeAndValue 3536bool LLParser::ParseShuffleVector(Instruction *&Inst, PerFunctionState &PFS) { 3537 LocTy Loc; 3538 Value *Op0, *Op1, *Op2; 3539 if (ParseTypeAndValue(Op0, Loc, PFS) || 3540 ParseToken(lltok::comma, "expected ',' after shuffle mask") || 3541 ParseTypeAndValue(Op1, PFS) || 3542 ParseToken(lltok::comma, "expected ',' after shuffle value") || 3543 ParseTypeAndValue(Op2, PFS)) 3544 return true; 3545 3546 if (!ShuffleVectorInst::isValidOperands(Op0, Op1, Op2)) 3547 return Error(Loc, "invalid shufflevector operands"); 3548 3549 Inst = new ShuffleVectorInst(Op0, Op1, Op2); 3550 return false; 3551} 3552 3553/// ParsePHI 3554/// ::= 'phi' Type '[' Value ',' Value ']' (',' '[' Value ',' Value ']')* 3555int LLParser::ParsePHI(Instruction *&Inst, PerFunctionState &PFS) { 3556 Type *Ty = 0; LocTy TypeLoc; 3557 Value *Op0, *Op1; 3558 3559 if (ParseType(Ty, TypeLoc) || 3560 ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3561 ParseValue(Ty, Op0, PFS) || 3562 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3563 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3564 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3565 return true; 3566 3567 bool AteExtraComma = false; 3568 SmallVector<std::pair<Value*, BasicBlock*>, 16> PHIVals; 3569 while (1) { 3570 PHIVals.push_back(std::make_pair(Op0, cast<BasicBlock>(Op1))); 3571 3572 if (!EatIfPresent(lltok::comma)) 3573 break; 3574 3575 if (Lex.getKind() == lltok::MetadataVar) { 3576 AteExtraComma = true; 3577 break; 3578 } 3579 3580 if (ParseToken(lltok::lsquare, "expected '[' in phi value list") || 3581 ParseValue(Ty, Op0, PFS) || 3582 ParseToken(lltok::comma, "expected ',' after insertelement value") || 3583 ParseValue(Type::getLabelTy(Context), Op1, PFS) || 3584 ParseToken(lltok::rsquare, "expected ']' in phi value list")) 3585 return true; 3586 } 3587 3588 if (!Ty->isFirstClassType()) 3589 return Error(TypeLoc, "phi node must have first class type"); 3590 3591 PHINode *PN = PHINode::Create(Ty, PHIVals.size()); 3592 for (unsigned i = 0, e = PHIVals.size(); i != e; ++i) 3593 PN->addIncoming(PHIVals[i].first, PHIVals[i].second); 3594 Inst = PN; 3595 return AteExtraComma ? InstExtraComma : InstNormal; 3596} 3597 3598/// ParseLandingPad 3599/// ::= 'landingpad' Type 'personality' TypeAndValue 'cleanup'? Clause+ 3600/// Clause 3601/// ::= 'catch' TypeAndValue 3602/// ::= 'filter' 3603/// ::= 'filter' TypeAndValue ( ',' TypeAndValue )* 3604bool LLParser::ParseLandingPad(Instruction *&Inst, PerFunctionState &PFS) { 3605 Type *Ty = 0; LocTy TyLoc; 3606 Value *PersFn; LocTy PersFnLoc; 3607 3608 if (ParseType(Ty, TyLoc) || 3609 ParseToken(lltok::kw_personality, "expected 'personality'") || 3610 ParseTypeAndValue(PersFn, PersFnLoc, PFS)) 3611 return true; 3612 3613 LandingPadInst *LP = LandingPadInst::Create(Ty, PersFn, 0); 3614 LP->setCleanup(EatIfPresent(lltok::kw_cleanup)); 3615 3616 while (Lex.getKind() == lltok::kw_catch || Lex.getKind() == lltok::kw_filter){ 3617 LandingPadInst::ClauseType CT; 3618 if (EatIfPresent(lltok::kw_catch)) 3619 CT = LandingPadInst::Catch; 3620 else if (EatIfPresent(lltok::kw_filter)) 3621 CT = LandingPadInst::Filter; 3622 else 3623 return TokError("expected 'catch' or 'filter' clause type"); 3624 3625 Value *V; LocTy VLoc; 3626 if (ParseTypeAndValue(V, VLoc, PFS)) { 3627 delete LP; 3628 return true; 3629 } 3630 3631 // A 'catch' type expects a non-array constant. A filter clause expects an 3632 // array constant. 3633 if (CT == LandingPadInst::Catch) { 3634 if (isa<ArrayType>(V->getType())) 3635 Error(VLoc, "'catch' clause has an invalid type"); 3636 } else { 3637 if (!isa<ArrayType>(V->getType())) 3638 Error(VLoc, "'filter' clause has an invalid type"); 3639 } 3640 3641 LP->addClause(V); 3642 } 3643 3644 Inst = LP; 3645 return false; 3646} 3647 3648/// ParseCall 3649/// ::= 'tail'? 'call' OptionalCallingConv OptionalAttrs Type Value 3650/// ParameterList OptionalAttrs 3651bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS, 3652 bool isTail) { 3653 Attributes::Builder RetAttrs, FnAttrs; 3654 CallingConv::ID CC; 3655 Type *RetType = 0; 3656 LocTy RetTypeLoc; 3657 ValID CalleeID; 3658 SmallVector<ParamInfo, 16> ArgList; 3659 LocTy CallLoc = Lex.getLoc(); 3660 3661 if ((isTail && ParseToken(lltok::kw_call, "expected 'tail call'")) || 3662 ParseOptionalCallingConv(CC) || 3663 ParseOptionalAttrs(RetAttrs, 1) || 3664 ParseType(RetType, RetTypeLoc, true /*void allowed*/) || 3665 ParseValID(CalleeID) || 3666 ParseParameterList(ArgList, PFS) || 3667 ParseOptionalAttrs(FnAttrs, 2)) 3668 return true; 3669 3670 // If RetType is a non-function pointer type, then this is the short syntax 3671 // for the call, which means that RetType is just the return type. Infer the 3672 // rest of the function argument types from the arguments that are present. 3673 PointerType *PFTy = 0; 3674 FunctionType *Ty = 0; 3675 if (!(PFTy = dyn_cast<PointerType>(RetType)) || 3676 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) { 3677 // Pull out the types of all of the arguments... 3678 std::vector<Type*> ParamTypes; 3679 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) 3680 ParamTypes.push_back(ArgList[i].V->getType()); 3681 3682 if (!FunctionType::isValidReturnType(RetType)) 3683 return Error(RetTypeLoc, "Invalid result type for LLVM function"); 3684 3685 Ty = FunctionType::get(RetType, ParamTypes, false); 3686 PFTy = PointerType::getUnqual(Ty); 3687 } 3688 3689 // Look up the callee. 3690 Value *Callee; 3691 if (ConvertValIDToValue(PFTy, CalleeID, Callee, &PFS)) return true; 3692 3693 // Set up the Attributes for the function. 3694 SmallVector<AttributeWithIndex, 8> Attrs; 3695 if (RetAttrs.hasAttributes()) 3696 Attrs.push_back(AttributeWithIndex::get(0, Attributes::get(RetAttrs))); 3697 3698 SmallVector<Value*, 8> Args; 3699 3700 // Loop through FunctionType's arguments and ensure they are specified 3701 // correctly. Also, gather any parameter attributes. 3702 FunctionType::param_iterator I = Ty->param_begin(); 3703 FunctionType::param_iterator E = Ty->param_end(); 3704 for (unsigned i = 0, e = ArgList.size(); i != e; ++i) { 3705 Type *ExpectedTy = 0; 3706 if (I != E) { 3707 ExpectedTy = *I++; 3708 } else if (!Ty->isVarArg()) { 3709 return Error(ArgList[i].Loc, "too many arguments specified"); 3710 } 3711 3712 if (ExpectedTy && ExpectedTy != ArgList[i].V->getType()) 3713 return Error(ArgList[i].Loc, "argument is not of expected type '" + 3714 getTypeString(ExpectedTy) + "'"); 3715 Args.push_back(ArgList[i].V); 3716 if (ArgList[i].Attrs.hasAttributes()) 3717 Attrs.push_back(AttributeWithIndex::get(i+1, ArgList[i].Attrs)); 3718 } 3719 3720 if (I != E) 3721 return Error(CallLoc, "not enough parameters specified for call"); 3722 3723 if (FnAttrs.hasAttributes()) 3724 Attrs.push_back(AttributeWithIndex::get(~0, Attributes::get(FnAttrs))); 3725 3726 // Finish off the Attributes and check them 3727 AttrListPtr PAL = AttrListPtr::get(Attrs); 3728 3729 CallInst *CI = CallInst::Create(Callee, Args); 3730 CI->setTailCall(isTail); 3731 CI->setCallingConv(CC); 3732 CI->setAttributes(PAL); 3733 Inst = CI; 3734 return false; 3735} 3736 3737//===----------------------------------------------------------------------===// 3738// Memory Instructions. 3739//===----------------------------------------------------------------------===// 3740 3741/// ParseAlloc 3742/// ::= 'alloca' Type (',' TypeAndValue)? (',' OptionalInfo)? 3743int LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS) { 3744 Value *Size = 0; 3745 LocTy SizeLoc; 3746 unsigned Alignment = 0; 3747 Type *Ty = 0; 3748 if (ParseType(Ty)) return true; 3749 3750 bool AteExtraComma = false; 3751 if (EatIfPresent(lltok::comma)) { 3752 if (Lex.getKind() == lltok::kw_align) { 3753 if (ParseOptionalAlignment(Alignment)) return true; 3754 } else if (Lex.getKind() == lltok::MetadataVar) { 3755 AteExtraComma = true; 3756 } else { 3757 if (ParseTypeAndValue(Size, SizeLoc, PFS) || 3758 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3759 return true; 3760 } 3761 } 3762 3763 if (Size && !Size->getType()->isIntegerTy()) 3764 return Error(SizeLoc, "element count must have integer type"); 3765 3766 Inst = new AllocaInst(Ty, Size, Alignment); 3767 return AteExtraComma ? InstExtraComma : InstNormal; 3768} 3769 3770/// ParseLoad 3771/// ::= 'load' 'volatile'? TypeAndValue (',' 'align' i32)? 3772/// ::= 'load' 'atomic' 'volatile'? TypeAndValue 3773/// 'singlethread'? AtomicOrdering (',' 'align' i32)? 3774int LLParser::ParseLoad(Instruction *&Inst, PerFunctionState &PFS) { 3775 Value *Val; LocTy Loc; 3776 unsigned Alignment = 0; 3777 bool AteExtraComma = false; 3778 bool isAtomic = false; 3779 AtomicOrdering Ordering = NotAtomic; 3780 SynchronizationScope Scope = CrossThread; 3781 3782 if (Lex.getKind() == lltok::kw_atomic) { 3783 isAtomic = true; 3784 Lex.Lex(); 3785 } 3786 3787 bool isVolatile = false; 3788 if (Lex.getKind() == lltok::kw_volatile) { 3789 isVolatile = true; 3790 Lex.Lex(); 3791 } 3792 3793 if (ParseTypeAndValue(Val, Loc, PFS) || 3794 ParseScopeAndOrdering(isAtomic, Scope, Ordering) || 3795 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3796 return true; 3797 3798 if (!Val->getType()->isPointerTy() || 3799 !cast<PointerType>(Val->getType())->getElementType()->isFirstClassType()) 3800 return Error(Loc, "load operand must be a pointer to a first class type"); 3801 if (isAtomic && !Alignment) 3802 return Error(Loc, "atomic load must have explicit non-zero alignment"); 3803 if (Ordering == Release || Ordering == AcquireRelease) 3804 return Error(Loc, "atomic load cannot use Release ordering"); 3805 3806 Inst = new LoadInst(Val, "", isVolatile, Alignment, Ordering, Scope); 3807 return AteExtraComma ? InstExtraComma : InstNormal; 3808} 3809 3810/// ParseStore 3811 3812/// ::= 'store' 'volatile'? TypeAndValue ',' TypeAndValue (',' 'align' i32)? 3813/// ::= 'store' 'atomic' 'volatile'? TypeAndValue ',' TypeAndValue 3814/// 'singlethread'? AtomicOrdering (',' 'align' i32)? 3815int LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS) { 3816 Value *Val, *Ptr; LocTy Loc, PtrLoc; 3817 unsigned Alignment = 0; 3818 bool AteExtraComma = false; 3819 bool isAtomic = false; 3820 AtomicOrdering Ordering = NotAtomic; 3821 SynchronizationScope Scope = CrossThread; 3822 3823 if (Lex.getKind() == lltok::kw_atomic) { 3824 isAtomic = true; 3825 Lex.Lex(); 3826 } 3827 3828 bool isVolatile = false; 3829 if (Lex.getKind() == lltok::kw_volatile) { 3830 isVolatile = true; 3831 Lex.Lex(); 3832 } 3833 3834 if (ParseTypeAndValue(Val, Loc, PFS) || 3835 ParseToken(lltok::comma, "expected ',' after store operand") || 3836 ParseTypeAndValue(Ptr, PtrLoc, PFS) || 3837 ParseScopeAndOrdering(isAtomic, Scope, Ordering) || 3838 ParseOptionalCommaAlign(Alignment, AteExtraComma)) 3839 return true; 3840 3841 if (!Ptr->getType()->isPointerTy()) 3842 return Error(PtrLoc, "store operand must be a pointer"); 3843 if (!Val->getType()->isFirstClassType()) 3844 return Error(Loc, "store operand must be a first class value"); 3845 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType()) 3846 return Error(Loc, "stored value and pointer type do not match"); 3847 if (isAtomic && !Alignment) 3848 return Error(Loc, "atomic store must have explicit non-zero alignment"); 3849 if (Ordering == Acquire || Ordering == AcquireRelease) 3850 return Error(Loc, "atomic store cannot use Acquire ordering"); 3851 3852 Inst = new StoreInst(Val, Ptr, isVolatile, Alignment, Ordering, Scope); 3853 return AteExtraComma ? InstExtraComma : InstNormal; 3854} 3855 3856/// ParseCmpXchg 3857/// ::= 'cmpxchg' 'volatile'? TypeAndValue ',' TypeAndValue ',' TypeAndValue 3858/// 'singlethread'? AtomicOrdering 3859int LLParser::ParseCmpXchg(Instruction *&Inst, PerFunctionState &PFS) { 3860 Value *Ptr, *Cmp, *New; LocTy PtrLoc, CmpLoc, NewLoc; 3861 bool AteExtraComma = false; 3862 AtomicOrdering Ordering = NotAtomic; 3863 SynchronizationScope Scope = CrossThread; 3864 bool isVolatile = false; 3865 3866 if (EatIfPresent(lltok::kw_volatile)) 3867 isVolatile = true; 3868 3869 if (ParseTypeAndValue(Ptr, PtrLoc, PFS) || 3870 ParseToken(lltok::comma, "expected ',' after cmpxchg address") || 3871 ParseTypeAndValue(Cmp, CmpLoc, PFS) || 3872 ParseToken(lltok::comma, "expected ',' after cmpxchg cmp operand") || 3873 ParseTypeAndValue(New, NewLoc, PFS) || 3874 ParseScopeAndOrdering(true /*Always atomic*/, Scope, Ordering)) 3875 return true; 3876 3877 if (Ordering == Unordered) 3878 return TokError("cmpxchg cannot be unordered"); 3879 if (!Ptr->getType()->isPointerTy()) 3880 return Error(PtrLoc, "cmpxchg operand must be a pointer"); 3881 if (cast<PointerType>(Ptr->getType())->getElementType() != Cmp->getType()) 3882 return Error(CmpLoc, "compare value and pointer type do not match"); 3883 if (cast<PointerType>(Ptr->getType())->getElementType() != New->getType()) 3884 return Error(NewLoc, "new value and pointer type do not match"); 3885 if (!New->getType()->isIntegerTy()) 3886 return Error(NewLoc, "cmpxchg operand must be an integer"); 3887 unsigned Size = New->getType()->getPrimitiveSizeInBits(); 3888 if (Size < 8 || (Size & (Size - 1))) 3889 return Error(NewLoc, "cmpxchg operand must be power-of-two byte-sized" 3890 " integer"); 3891 3892 AtomicCmpXchgInst *CXI = 3893 new AtomicCmpXchgInst(Ptr, Cmp, New, Ordering, Scope); 3894 CXI->setVolatile(isVolatile); 3895 Inst = CXI; 3896 return AteExtraComma ? InstExtraComma : InstNormal; 3897} 3898 3899/// ParseAtomicRMW 3900/// ::= 'atomicrmw' 'volatile'? BinOp TypeAndValue ',' TypeAndValue 3901/// 'singlethread'? AtomicOrdering 3902int LLParser::ParseAtomicRMW(Instruction *&Inst, PerFunctionState &PFS) { 3903 Value *Ptr, *Val; LocTy PtrLoc, ValLoc; 3904 bool AteExtraComma = false; 3905 AtomicOrdering Ordering = NotAtomic; 3906 SynchronizationScope Scope = CrossThread; 3907 bool isVolatile = false; 3908 AtomicRMWInst::BinOp Operation; 3909 3910 if (EatIfPresent(lltok::kw_volatile)) 3911 isVolatile = true; 3912 3913 switch (Lex.getKind()) { 3914 default: return TokError("expected binary operation in atomicrmw"); 3915 case lltok::kw_xchg: Operation = AtomicRMWInst::Xchg; break; 3916 case lltok::kw_add: Operation = AtomicRMWInst::Add; break; 3917 case lltok::kw_sub: Operation = AtomicRMWInst::Sub; break; 3918 case lltok::kw_and: Operation = AtomicRMWInst::And; break; 3919 case lltok::kw_nand: Operation = AtomicRMWInst::Nand; break; 3920 case lltok::kw_or: Operation = AtomicRMWInst::Or; break; 3921 case lltok::kw_xor: Operation = AtomicRMWInst::Xor; break; 3922 case lltok::kw_max: Operation = AtomicRMWInst::Max; break; 3923 case lltok::kw_min: Operation = AtomicRMWInst::Min; break; 3924 case lltok::kw_umax: Operation = AtomicRMWInst::UMax; break; 3925 case lltok::kw_umin: Operation = AtomicRMWInst::UMin; break; 3926 } 3927 Lex.Lex(); // Eat the operation. 3928 3929 if (ParseTypeAndValue(Ptr, PtrLoc, PFS) || 3930 ParseToken(lltok::comma, "expected ',' after atomicrmw address") || 3931 ParseTypeAndValue(Val, ValLoc, PFS) || 3932 ParseScopeAndOrdering(true /*Always atomic*/, Scope, Ordering)) 3933 return true; 3934 3935 if (Ordering == Unordered) 3936 return TokError("atomicrmw cannot be unordered"); 3937 if (!Ptr->getType()->isPointerTy()) 3938 return Error(PtrLoc, "atomicrmw operand must be a pointer"); 3939 if (cast<PointerType>(Ptr->getType())->getElementType() != Val->getType()) 3940 return Error(ValLoc, "atomicrmw value and pointer type do not match"); 3941 if (!Val->getType()->isIntegerTy()) 3942 return Error(ValLoc, "atomicrmw operand must be an integer"); 3943 unsigned Size = Val->getType()->getPrimitiveSizeInBits(); 3944 if (Size < 8 || (Size & (Size - 1))) 3945 return Error(ValLoc, "atomicrmw operand must be power-of-two byte-sized" 3946 " integer"); 3947 3948 AtomicRMWInst *RMWI = 3949 new AtomicRMWInst(Operation, Ptr, Val, Ordering, Scope); 3950 RMWI->setVolatile(isVolatile); 3951 Inst = RMWI; 3952 return AteExtraComma ? InstExtraComma : InstNormal; 3953} 3954 3955/// ParseFence 3956/// ::= 'fence' 'singlethread'? AtomicOrdering 3957int LLParser::ParseFence(Instruction *&Inst, PerFunctionState &PFS) { 3958 AtomicOrdering Ordering = NotAtomic; 3959 SynchronizationScope Scope = CrossThread; 3960 if (ParseScopeAndOrdering(true /*Always atomic*/, Scope, Ordering)) 3961 return true; 3962 3963 if (Ordering == Unordered) 3964 return TokError("fence cannot be unordered"); 3965 if (Ordering == Monotonic) 3966 return TokError("fence cannot be monotonic"); 3967 3968 Inst = new FenceInst(Context, Ordering, Scope); 3969 return InstNormal; 3970} 3971 3972/// ParseGetElementPtr 3973/// ::= 'getelementptr' 'inbounds'? TypeAndValue (',' TypeAndValue)* 3974int LLParser::ParseGetElementPtr(Instruction *&Inst, PerFunctionState &PFS) { 3975 Value *Ptr = 0; 3976 Value *Val = 0; 3977 LocTy Loc, EltLoc; 3978 3979 bool InBounds = EatIfPresent(lltok::kw_inbounds); 3980 3981 if (ParseTypeAndValue(Ptr, Loc, PFS)) return true; 3982 3983 if (!Ptr->getType()->getScalarType()->isPointerTy()) 3984 return Error(Loc, "base of getelementptr must be a pointer"); 3985 3986 SmallVector<Value*, 16> Indices; 3987 bool AteExtraComma = false; 3988 while (EatIfPresent(lltok::comma)) { 3989 if (Lex.getKind() == lltok::MetadataVar) { 3990 AteExtraComma = true; 3991 break; 3992 } 3993 if (ParseTypeAndValue(Val, EltLoc, PFS)) return true; 3994 if (!Val->getType()->getScalarType()->isIntegerTy()) 3995 return Error(EltLoc, "getelementptr index must be an integer"); 3996 if (Val->getType()->isVectorTy() != Ptr->getType()->isVectorTy()) 3997 return Error(EltLoc, "getelementptr index type missmatch"); 3998 if (Val->getType()->isVectorTy()) { 3999 unsigned ValNumEl = cast<VectorType>(Val->getType())->getNumElements(); 4000 unsigned PtrNumEl = cast<VectorType>(Ptr->getType())->getNumElements(); 4001 if (ValNumEl != PtrNumEl) 4002 return Error(EltLoc, 4003 "getelementptr vector index has a wrong number of elements"); 4004 } 4005 Indices.push_back(Val); 4006 } 4007 4008 if (Val && Val->getType()->isVectorTy() && Indices.size() != 1) 4009 return Error(EltLoc, "vector getelementptrs must have a single index"); 4010 4011 if (!GetElementPtrInst::getIndexedType(Ptr->getType(), Indices)) 4012 return Error(Loc, "invalid getelementptr indices"); 4013 Inst = GetElementPtrInst::Create(Ptr, Indices); 4014 if (InBounds) 4015 cast<GetElementPtrInst>(Inst)->setIsInBounds(true); 4016 return AteExtraComma ? InstExtraComma : InstNormal; 4017} 4018 4019/// ParseExtractValue 4020/// ::= 'extractvalue' TypeAndValue (',' uint32)+ 4021int LLParser::ParseExtractValue(Instruction *&Inst, PerFunctionState &PFS) { 4022 Value *Val; LocTy Loc; 4023 SmallVector<unsigned, 4> Indices; 4024 bool AteExtraComma; 4025 if (ParseTypeAndValue(Val, Loc, PFS) || 4026 ParseIndexList(Indices, AteExtraComma)) 4027 return true; 4028 4029 if (!Val->getType()->isAggregateType()) 4030 return Error(Loc, "extractvalue operand must be aggregate type"); 4031 4032 if (!ExtractValueInst::getIndexedType(Val->getType(), Indices)) 4033 return Error(Loc, "invalid indices for extractvalue"); 4034 Inst = ExtractValueInst::Create(Val, Indices); 4035 return AteExtraComma ? InstExtraComma : InstNormal; 4036} 4037 4038/// ParseInsertValue 4039/// ::= 'insertvalue' TypeAndValue ',' TypeAndValue (',' uint32)+ 4040int LLParser::ParseInsertValue(Instruction *&Inst, PerFunctionState &PFS) { 4041 Value *Val0, *Val1; LocTy Loc0, Loc1; 4042 SmallVector<unsigned, 4> Indices; 4043 bool AteExtraComma; 4044 if (ParseTypeAndValue(Val0, Loc0, PFS) || 4045 ParseToken(lltok::comma, "expected comma after insertvalue operand") || 4046 ParseTypeAndValue(Val1, Loc1, PFS) || 4047 ParseIndexList(Indices, AteExtraComma)) 4048 return true; 4049 4050 if (!Val0->getType()->isAggregateType()) 4051 return Error(Loc0, "insertvalue operand must be aggregate type"); 4052 4053 if (!ExtractValueInst::getIndexedType(Val0->getType(), Indices)) 4054 return Error(Loc0, "invalid indices for insertvalue"); 4055 Inst = InsertValueInst::Create(Val0, Val1, Indices); 4056 return AteExtraComma ? InstExtraComma : InstNormal; 4057} 4058 4059//===----------------------------------------------------------------------===// 4060// Embedded metadata. 4061//===----------------------------------------------------------------------===// 4062 4063/// ParseMDNodeVector 4064/// ::= Element (',' Element)* 4065/// Element 4066/// ::= 'null' | TypeAndValue 4067bool LLParser::ParseMDNodeVector(SmallVectorImpl<Value*> &Elts, 4068 PerFunctionState *PFS) { 4069 // Check for an empty list. 4070 if (Lex.getKind() == lltok::rbrace) 4071 return false; 4072 4073 do { 4074 // Null is a special case since it is typeless. 4075 if (EatIfPresent(lltok::kw_null)) { 4076 Elts.push_back(0); 4077 continue; 4078 } 4079 4080 Value *V = 0; 4081 if (ParseTypeAndValue(V, PFS)) return true; 4082 Elts.push_back(V); 4083 } while (EatIfPresent(lltok::comma)); 4084 4085 return false; 4086} 4087