lib/AsmParser/llvmAsmParser.y

   1 //===-- llvmAsmParser.y - Parser for llvm assembly files --------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file was developed by the LLVM research group and is distributed under
   6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 //  This file implements the bison parser for LLVM assembly languages files.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 %{
  15 #include "ParserInternals.h"
  16 #include "llvm/CallingConv.h"
  17 #include "llvm/InlineAsm.h"
  18 #include "llvm/Instructions.h"
  19 #include "llvm/Module.h"
  20 #include "llvm/ValueSymbolTable.h"
  21 #include "llvm/AutoUpgrade.h"
  22 #include "llvm/Support/GetElementPtrTypeIterator.h"
  23 #include "llvm/Support/CommandLine.h"
  24 #include "llvm/ADT/SmallVector.h"
  25 #include "llvm/ADT/STLExtras.h"
  26 #include "llvm/Support/MathExtras.h"
  27 #include "llvm/Support/Streams.h"
  28 #include <algorithm>
  29 #include <list>
  30 #include <map>
  31 #include <utility>
  32 #ifndef NDEBUG
  33 #define YYDEBUG 1
  34 #endif
  35
  36 // The following is a gross hack. In order to rid the libAsmParser library of
  37 // exceptions, we have to have a way of getting the yyparse function to go into
  38 // an error situation. So, whenever we want an error to occur, the GenerateError
  39 // function (see bottom of file) sets TriggerError. Then, at the end of each
  40 // production in the grammer we use CHECK_FOR_ERROR which will invoke YYERROR
  41 // (a goto) to put YACC in error state. Furthermore, several calls to
  42 // GenerateError are made from inside productions and they must simulate the
  43 // previous exception behavior by exiting the production immediately. We have
  44 // replaced these with the GEN_ERROR macro which calls GeneratError and then
  45 // immediately invokes YYERROR. This would be so much cleaner if it was a
  46 // recursive descent parser.
  47 static bool TriggerError = false;
  48 #define CHECK_FOR_ERROR { if (TriggerError) { TriggerError = false; YYABORT; } }
  49 #define GEN_ERROR(msg) { GenerateError(msg); YYERROR; }
  50
  51 int yyerror(const char *ErrorMsg); // Forward declarations to prevent "implicit
  52 int yylex();                       // declaration" of xxx warnings.
  53 int yyparse();
  54
  55 namespace llvm {
  56   std::string CurFilename;
  57 #if YYDEBUG
  58 static cl::opt<bool>
  59 Debug("debug-yacc", cl::desc("Print yacc debug state changes"),
  60       cl::Hidden, cl::init(false));
  61 #endif
  62 }
  63 using namespace llvm;
  64
  65 static Module *ParserResult;
  66
  67 // DEBUG_UPREFS - Define this symbol if you want to enable debugging output
  68 // relating to upreferences in the input stream.
  69 //
  70 //#define DEBUG_UPREFS 1
  71 #ifdef DEBUG_UPREFS
  72 #define UR_OUT(X) cerr << X
  73 #else
  74 #define UR_OUT(X)
  75 #endif
  76
  77 #define YYERROR_VERBOSE 1
  78
  79 static GlobalVariable *CurGV;
  80
  81
  82 // This contains info used when building the body of a function.  It is
  83 // destroyed when the function is completed.
  84 //
  85 typedef std::vector<Value *> ValueList;           // Numbered defs
  86
  87 static void
  88 ResolveDefinitions(ValueList &LateResolvers, ValueList *FutureLateResolvers=0);
  89
  90 static struct PerModuleInfo {
  91   Module *CurrentModule;
  92   ValueList Values; // Module level numbered definitions
  93   ValueList LateResolveValues;
  94   std::vector<PATypeHolder>    Types;
  95   std::map<ValID, PATypeHolder> LateResolveTypes;
  96
  97   /// PlaceHolderInfo - When temporary placeholder objects are created, remember
  98   /// how they were referenced and on which line of the input they came from so
  99   /// that we can resolve them later and print error messages as appropriate.
 100   std::map<Value*, std::pair<ValID, int> > PlaceHolderInfo;
 101
 102   // GlobalRefs - This maintains a mapping between <Type, ValID>'s and forward
 103   // references to global values.  Global values may be referenced before they
 104   // are defined, and if so, the temporary object that they represent is held
 105   // here.  This is used for forward references of GlobalValues.
 106   //
 107   typedef std::map<std::pair<const PointerType *,
 108                              ValID>, GlobalValue*> GlobalRefsType;
 109   GlobalRefsType GlobalRefs;
 110
 111   void ModuleDone() {
 112     // If we could not resolve some functions at function compilation time
 113     // (calls to functions before they are defined), resolve them now...  Types
 114     // are resolved when the constant pool has been completely parsed.
 115     //
 116     ResolveDefinitions(LateResolveValues);
 117     if (TriggerError)
 118       return;
 119
 120     // Check to make sure that all global value forward references have been
 121     // resolved!
 122     //
 123     if (!GlobalRefs.empty()) {
 124       std::string UndefinedReferences = "Unresolved global references exist:\n";
 125
 126       for (GlobalRefsType::iterator I = GlobalRefs.begin(), E =GlobalRefs.end();
 127            I != E; ++I) {
 128         UndefinedReferences += "  " + I->first.first->getDescription() + " " +
 129                                I->first.second.getName() + "\n";
 130       }
 131       GenerateError(UndefinedReferences);
 132       return;
 133     }
 134
 135     // Look for intrinsic functions and CallInst that need to be upgraded
 136     for (Module::iterator FI = CurrentModule->begin(),
 137          FE = CurrentModule->end(); FI != FE; )
 138       UpgradeCallsToIntrinsic(FI++); // must be post-increment, as we remove
 139
 140     Values.clear();         // Clear out function local definitions
 141     Types.clear();
 142     CurrentModule = 0;
 143   }
 144
 145   // GetForwardRefForGlobal - Check to see if there is a forward reference
 146   // for this global.  If so, remove it from the GlobalRefs map and return it.
 147   // If not, just return null.
 148   GlobalValue *GetForwardRefForGlobal(const PointerType *PTy, ValID ID) {
 149     // Check to see if there is a forward reference to this global variable...
 150     // if there is, eliminate it and patch the reference to use the new def'n.
 151     GlobalRefsType::iterator I = GlobalRefs.find(std::make_pair(PTy, ID));
 152     GlobalValue *Ret = 0;
 153     if (I != GlobalRefs.end()) {
 154       Ret = I->second;
 155       GlobalRefs.erase(I);
 156     }
 157     return Ret;
 158   }
 159
 160   bool TypeIsUnresolved(PATypeHolder* PATy) {
 161     // If it isn't abstract, its resolved
 162     const Type* Ty = PATy->get();
 163     if (!Ty->isAbstract())
 164       return false;
 165     // Traverse the type looking for abstract types. If it isn't abstract then
 166     // we don't need to traverse that leg of the type.
 167     std::vector<const Type*> WorkList, SeenList;
 168     WorkList.push_back(Ty);
 169     while (!WorkList.empty()) {
 170       const Type* Ty = WorkList.back();
 171       SeenList.push_back(Ty);
 172       WorkList.pop_back();
 173       if (const OpaqueType* OpTy = dyn_cast<OpaqueType>(Ty)) {
 174         // Check to see if this is an unresolved type
 175         std::map<ValID, PATypeHolder>::iterator I = LateResolveTypes.begin();
 176         std::map<ValID, PATypeHolder>::iterator E = LateResolveTypes.end();
 177         for ( ; I != E; ++I) {
 178           if (I->second.get() == OpTy)
 179             return true;
 180         }
 181       } else if (const SequentialType* SeqTy = dyn_cast<SequentialType>(Ty)) {
 182         const Type* TheTy = SeqTy->getElementType();
 183         if (TheTy->isAbstract() && TheTy != Ty) {
 184           std::vector<const Type*>::iterator I = SeenList.begin(),
 185                                              E = SeenList.end();
 186           for ( ; I != E; ++I)
 187             if (*I == TheTy)
 188               break;
 189           if (I == E)
 190             WorkList.push_back(TheTy);
 191         }
 192       } else if (const StructType* StrTy = dyn_cast<StructType>(Ty)) {
 193         for (unsigned i = 0; i < StrTy->getNumElements(); ++i) {
 194           const Type* TheTy = StrTy->getElementType(i);
 195           if (TheTy->isAbstract() && TheTy != Ty) {
 196             std::vector<const Type*>::iterator I = SeenList.begin(),
 197                                                E = SeenList.end();
 198             for ( ; I != E; ++I)
 199               if (*I == TheTy)
 200                 break;
 201             if (I == E)
 202               WorkList.push_back(TheTy);
 203           }
 204         }
 205       }
 206     }
 207     return false;
 208   }
 209 } CurModule;
 210
 211 static struct PerFunctionInfo {
 212   Function *CurrentFunction;     // Pointer to current function being created
 213
 214   ValueList Values; // Keep track of #'d definitions
 215   unsigned NextValNum;
 216   ValueList LateResolveValues;
 217   bool isDeclare;                   // Is this function a forward declararation?
 218   GlobalValue::LinkageTypes Linkage; // Linkage for forward declaration.
 219   GlobalValue::VisibilityTypes Visibility;
 220
 221   /// BBForwardRefs - When we see forward references to basic blocks, keep
 222   /// track of them here.
 223   std::map<ValID, BasicBlock*> BBForwardRefs;
 224
 225   inline PerFunctionInfo() {
 226     CurrentFunction = 0;
 227     isDeclare = false;
 228     Linkage = GlobalValue::ExternalLinkage;
 229     Visibility = GlobalValue::DefaultVisibility;
 230   }
 231
 232   inline void FunctionStart(Function *M) {
 233     CurrentFunction = M;
 234     NextValNum = 0;
 235   }
 236
 237   void FunctionDone() {
 238     // Any forward referenced blocks left?
 239     if (!BBForwardRefs.empty()) {
 240       GenerateError("Undefined reference to label " +
 241                      BBForwardRefs.begin()->second->getName());
 242       return;
 243     }
 244
 245     // Resolve all forward references now.
 246     ResolveDefinitions(LateResolveValues, &CurModule.LateResolveValues);
 247
 248     Values.clear();         // Clear out function local definitions
 249     BBForwardRefs.clear();
 250     CurrentFunction = 0;
 251     isDeclare = false;
 252     Linkage = GlobalValue::ExternalLinkage;
 253     Visibility = GlobalValue::DefaultVisibility;
 254   }
 255 } CurFun;  // Info for the current function...
 256
 257 static bool inFunctionScope() { return CurFun.CurrentFunction != 0; }
 258
 259
 260 //===----------------------------------------------------------------------===//
 261 //               Code to handle definitions of all the types
 262 //===----------------------------------------------------------------------===//
 263
 264 static void InsertValue(Value *V, ValueList &ValueTab = CurFun.Values) {
 265   // Things that have names or are void typed don't get slot numbers
 266   if (V->hasName() || (V->getType() == Type::VoidTy))
 267     return;
 268
 269   // In the case of function values, we have to allow for the forward reference
 270   // of basic blocks, which are included in the numbering. Consequently, we keep
 271   // track of the next insertion location with NextValNum. When a BB gets
 272   // inserted, it could change the size of the CurFun.Values vector.
 273   if (&ValueTab == &CurFun.Values) {
 274     if (ValueTab.size() <= CurFun.NextValNum)
 275       ValueTab.resize(CurFun.NextValNum+1);
 276     ValueTab[CurFun.NextValNum++] = V;
 277     return;
 278   }
 279   // For all other lists, its okay to just tack it on the back of the vector.
 280   ValueTab.push_back(V);
 281 }
 282
 283 static const Type *getTypeVal(const ValID &D, bool DoNotImprovise = false) {
 284   switch (D.Type) {
 285   case ValID::LocalID:               // Is it a numbered definition?
 286     // Module constants occupy the lowest numbered slots...
 287     if (D.Num < CurModule.Types.size())
 288       return CurModule.Types[D.Num];
 289     break;
 290   case ValID::LocalName:                 // Is it a named definition?
 291     if (const Type *N = CurModule.CurrentModule->getTypeByName(D.getName())) {
 292       D.destroy();  // Free old strdup'd memory...
 293       return N;
 294     }
 295     break;
 296   default:
 297     GenerateError("Internal parser error: Invalid symbol type reference");
 298     return 0;
 299   }
 300
 301   // If we reached here, we referenced either a symbol that we don't know about
 302   // or an id number that hasn't been read yet.  We may be referencing something
 303   // forward, so just create an entry to be resolved later and get to it...
 304   //
 305   if (DoNotImprovise) return 0;  // Do we just want a null to be returned?
 306
 307
 308   if (inFunctionScope()) {
 309     if (D.Type == ValID::LocalName) {
 310       GenerateError("Reference to an undefined type: '" + D.getName() + "'");
 311       return 0;
 312     } else {
 313       GenerateError("Reference to an undefined type: #" + utostr(D.Num));
 314       return 0;
 315     }
 316   }
 317
 318   std::map<ValID, PATypeHolder>::iterator I =CurModule.LateResolveTypes.find(D);
 319   if (I != CurModule.LateResolveTypes.end())
 320     return I->second;
 321
 322   Type *Typ = OpaqueType::get();
 323   CurModule.LateResolveTypes.insert(std::make_pair(D, Typ));
 324   return Typ;
 325  }
 326
 327 // getExistingVal - Look up the value specified by the provided type and
 328 // the provided ValID.  If the value exists and has already been defined, return
 329 // it.  Otherwise return null.
 330 //
 331 static Value *getExistingVal(const Type *Ty, const ValID &D) {
 332   if (isa<FunctionType>(Ty)) {
 333     GenerateError("Functions are not values and "
 334                    "must be referenced as pointers");
 335     return 0;
 336   }
 337
 338   switch (D.Type) {
 339   case ValID::LocalID: {                 // Is it a numbered definition?
 340     // Check that the number is within bounds.
 341     if (D.Num >= CurFun.Values.size())
 342       return 0;
 343     Value *Result = CurFun.Values[D.Num];
 344     if (Ty != Result->getType()) {
 345       GenerateError("Numbered value (%" + utostr(D.Num) + ") of type '" +
 346                     Result->getType()->getDescription() + "' does not match "
 347                     "expected type, '" + Ty->getDescription() + "'");
 348       return 0;
 349     }
 350     return Result;
 351   }
 352   case ValID::GlobalID: {                 // Is it a numbered definition?
 353     if (D.Num >= CurModule.Values.size())
 354       return 0;
 355     Value *Result = CurModule.Values[D.Num];
 356     if (Ty != Result->getType()) {
 357       GenerateError("Numbered value (@" + utostr(D.Num) + ") of type '" +
 358                     Result->getType()->getDescription() + "' does not match "
 359                     "expected type, '" + Ty->getDescription() + "'");
 360       return 0;
 361     }
 362     return Result;
 363   }
 364
 365   case ValID::LocalName: {                // Is it a named definition?
 366     if (!inFunctionScope())
 367       return 0;
 368     ValueSymbolTable &SymTab = CurFun.CurrentFunction->getValueSymbolTable();
 369     Value *N = SymTab.lookup(D.getName());
 370     if (N == 0)
 371       return 0;
 372     if (N->getType() != Ty)
 373       return 0;
 374
 375     D.destroy();  // Free old strdup'd memory...
 376     return N;
 377   }
 378   case ValID::GlobalName: {                // Is it a named definition?
 379     ValueSymbolTable &SymTab = CurModule.CurrentModule->getValueSymbolTable();
 380     Value *N = SymTab.lookup(D.getName());
 381     if (N == 0)
 382       return 0;
 383     if (N->getType() != Ty)
 384       return 0;
 385
 386     D.destroy();  // Free old strdup'd memory...
 387     return N;
 388   }
 389
 390   // Check to make sure that "Ty" is an integral type, and that our
 391   // value will fit into the specified type...
 392   case ValID::ConstSIntVal:    // Is it a constant pool reference??
 393     if (!ConstantInt::isValueValidForType(Ty, D.ConstPool64)) {
 394       GenerateError("Signed integral constant '" +
 395                      itostr(D.ConstPool64) + "' is invalid for type '" +
 396                      Ty->getDescription() + "'");
 397       return 0;
 398     }
 399     return ConstantInt::get(Ty, D.ConstPool64, true);
 400
 401   case ValID::ConstUIntVal:     // Is it an unsigned const pool reference?
 402     if (!ConstantInt::isValueValidForType(Ty, D.UConstPool64)) {
 403       if (!ConstantInt::isValueValidForType(Ty, D.ConstPool64)) {
 404         GenerateError("Integral constant '" + utostr(D.UConstPool64) +
 405                        "' is invalid or out of range");
 406         return 0;
 407       } else {     // This is really a signed reference.  Transmogrify.
 408         return ConstantInt::get(Ty, D.ConstPool64, true);
 409       }
 410     } else {
 411       return ConstantInt::get(Ty, D.UConstPool64);
 412     }
 413
 414   case ValID::ConstFPVal:        // Is it a floating point const pool reference?
 415     if (!ConstantFP::isValueValidForType(Ty, *D.ConstPoolFP)) {
 416       GenerateError("FP constant invalid for type");
 417       return 0;
 418     }
 419     // Lexer has no type info, so builds all float and double  FP constants
 420     // as double.  Fix this here.  Long double does not need this.
 421     if (&D.ConstPoolFP->getSemantics() == &APFloat::IEEEdouble &&
 422         Ty==Type::FloatTy)
 423       D.ConstPoolFP->convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven);
 424     return ConstantFP::get(Ty, *D.ConstPoolFP);
 425
 426   case ValID::ConstNullVal:      // Is it a null value?
 427     if (!isa<PointerType>(Ty)) {
 428       GenerateError("Cannot create a a non pointer null");
 429       return 0;
 430     }
 431     return ConstantPointerNull::get(cast<PointerType>(Ty));
 432
 433   case ValID::ConstUndefVal:      // Is it an undef value?
 434     return UndefValue::get(Ty);
 435
 436   case ValID::ConstZeroVal:      // Is it a zero value?
 437     return Constant::getNullValue(Ty);
 438
 439   case ValID::ConstantVal:       // Fully resolved constant?
 440     if (D.ConstantValue->getType() != Ty) {
 441       GenerateError("Constant expression type different from required type");
 442       return 0;
 443     }
 444     return D.ConstantValue;
 445
 446   case ValID::InlineAsmVal: {    // Inline asm expression
 447     const PointerType *PTy = dyn_cast<PointerType>(Ty);
 448     const FunctionType *FTy =
 449       PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : 0;
 450     if (!FTy || !InlineAsm::Verify(FTy, D.IAD->Constraints)) {
 451       GenerateError("Invalid type for asm constraint string");
 452       return 0;
 453     }
 454     InlineAsm *IA = InlineAsm::get(FTy, D.IAD->AsmString, D.IAD->Constraints,
 455                                    D.IAD->HasSideEffects);
 456     D.destroy();   // Free InlineAsmDescriptor.
 457     return IA;
 458   }
 459   default:
 460     assert(0 && "Unhandled case!");
 461     return 0;
 462   }   // End of switch
 463
 464   assert(0 && "Unhandled case!");
 465   return 0;
 466 }
 467
 468 // getVal - This function is identical to getExistingVal, except that if a
 469 // value is not already defined, it "improvises" by creating a placeholder var
 470 // that looks and acts just like the requested variable.  When the value is
 471 // defined later, all uses of the placeholder variable are replaced with the
 472 // real thing.
 473 //
 474 static Value *getVal(const Type *Ty, const ValID &ID) {
 475   if (Ty == Type::LabelTy) {
 476     GenerateError("Cannot use a basic block here");
 477     return 0;
 478   }
 479
 480   // See if the value has already been defined.
 481   Value *V = getExistingVal(Ty, ID);
 482   if (V) return V;
 483   if (TriggerError) return 0;
 484
 485   if (!Ty->isFirstClassType() && !isa<OpaqueType>(Ty)) {
 486     GenerateError("Invalid use of a composite type");
 487     return 0;
 488   }
 489
 490   // If we reached here, we referenced either a symbol that we don't know about
 491   // or an id number that hasn't been read yet.  We may be referencing something
 492   // forward, so just create an entry to be resolved later and get to it...
 493   //
 494   switch (ID.Type) {
 495   case ValID::GlobalName:
 496   case ValID::GlobalID: {
 497    const PointerType *PTy = dyn_cast<PointerType>(Ty);
 498    if (!PTy) {
 499      GenerateError("Invalid type for reference to global" );
 500      return 0;
 501    }
 502    const Type* ElTy = PTy->getElementType();
 503    if (const FunctionType *FTy = dyn_cast<FunctionType>(ElTy))
 504      V = new Function(FTy, GlobalValue::ExternalLinkage);
 505    else
 506      V = new GlobalVariable(ElTy, false, GlobalValue::ExternalLinkage);
 507    break;
 508   }
 509   default:
 510    V = new Argument(Ty);
 511   }
 512
 513   // Remember where this forward reference came from.  FIXME, shouldn't we try
 514   // to recycle these things??
 515   CurModule.PlaceHolderInfo.insert(std::make_pair(V, std::make_pair(ID,
 516                                                                llvmAsmlineno)));
 517
 518   if (inFunctionScope())
 519     InsertValue(V, CurFun.LateResolveValues);
 520   else
 521     InsertValue(V, CurModule.LateResolveValues);
 522   return V;
 523 }
 524
 525 /// defineBBVal - This is a definition of a new basic block with the specified
 526 /// identifier which must be the same as CurFun.NextValNum, if its numeric.
 527 static BasicBlock *defineBBVal(const ValID &ID) {
 528   assert(inFunctionScope() && "Can't get basic block at global scope!");
 529
 530   BasicBlock *BB = 0;
 531
 532   // First, see if this was forward referenced
 533
 534   std::map<ValID, BasicBlock*>::iterator BBI = CurFun.BBForwardRefs.find(ID);
 535   if (BBI != CurFun.BBForwardRefs.end()) {
 536     BB = BBI->second;
 537     // The forward declaration could have been inserted anywhere in the
 538     // function: insert it into the correct place now.
 539     CurFun.CurrentFunction->getBasicBlockList().remove(BB);
 540     CurFun.CurrentFunction->getBasicBlockList().push_back(BB);
 541
 542     // We're about to erase the entry, save the key so we can clean it up.
 543     ValID Tmp = BBI->first;
 544
 545     // Erase the forward ref from the map as its no longer "forward"
 546     CurFun.BBForwardRefs.erase(ID);
 547
 548     // The key has been removed from the map but so we don't want to leave
 549     // strdup'd memory around so destroy it too.
 550     Tmp.destroy();
 551
 552     // If its a numbered definition, bump the number and set the BB value.
 553     if (ID.Type == ValID::LocalID) {
 554       assert(ID.Num == CurFun.NextValNum && "Invalid new block number");
 555       InsertValue(BB);
 556     }
 557
 558     ID.destroy();
 559     return BB;
 560   }
 561
 562   // We haven't seen this BB before and its first mention is a definition.
 563   // Just create it and return it.
 564   std::string Name (ID.Type == ValID::LocalName ? ID.getName() : "");
 565   BB = new BasicBlock(Name, CurFun.CurrentFunction);
 566   if (ID.Type == ValID::LocalID) {
 567     assert(ID.Num == CurFun.NextValNum && "Invalid new block number");
 568     InsertValue(BB);
 569   }
 570
 571   ID.destroy(); // Free strdup'd memory
 572   return BB;
 573 }
 574
 575 /// getBBVal - get an existing BB value or create a forward reference for it.
 576 ///
 577 static BasicBlock *getBBVal(const ValID &ID) {
 578   assert(inFunctionScope() && "Can't get basic block at global scope!");
 579
 580   BasicBlock *BB =  0;
 581
 582   std::map<ValID, BasicBlock*>::iterator BBI = CurFun.BBForwardRefs.find(ID);
 583   if (BBI != CurFun.BBForwardRefs.end()) {
 584     BB = BBI->second;
 585   } if (ID.Type == ValID::LocalName) {
 586     std::string Name = ID.getName();
 587     Value *N = CurFun.CurrentFunction->getValueSymbolTable().lookup(Name);
 588     if (N)
 589       if (N->getType()->getTypeID() == Type::LabelTyID)
 590         BB = cast<BasicBlock>(N);
 591       else
 592         GenerateError("Reference to label '" + Name + "' is actually of type '"+
 593           N->getType()->getDescription() + "'");
 594   } else if (ID.Type == ValID::LocalID) {
 595     if (ID.Num < CurFun.NextValNum && ID.Num < CurFun.Values.size()) {
 596       if (CurFun.Values[ID.Num]->getType()->getTypeID() == Type::LabelTyID)
 597         BB = cast<BasicBlock>(CurFun.Values[ID.Num]);
 598       else
 599         GenerateError("Reference to label '%" + utostr(ID.Num) +
 600           "' is actually of type '"+
 601           CurFun.Values[ID.Num]->getType()->getDescription() + "'");
 602     }
 603   } else {
 604     GenerateError("Illegal label reference " + ID.getName());
 605     return 0;
 606   }
 607
 608   // If its already been defined, return it now.
 609   if (BB) {
 610     ID.destroy(); // Free strdup'd memory.
 611     return BB;
 612   }
 613
 614   // Otherwise, this block has not been seen before, create it.
 615   std::string Name;
 616   if (ID.Type == ValID::LocalName)
 617     Name = ID.getName();
 618   BB = new BasicBlock(Name, CurFun.CurrentFunction);
 619
 620   // Insert it in the forward refs map.
 621   CurFun.BBForwardRefs[ID] = BB;
 622
 623   return BB;
 624 }
 625
 626
 627 //===----------------------------------------------------------------------===//
 628 //              Code to handle forward references in instructions
 629 //===----------------------------------------------------------------------===//
 630 //
 631 // This code handles the late binding needed with statements that reference
 632 // values not defined yet... for example, a forward branch, or the PHI node for
 633 // a loop body.
 634 //
 635 // This keeps a table (CurFun.LateResolveValues) of all such forward references
 636 // and back patchs after we are done.
 637 //
 638
 639 // ResolveDefinitions - If we could not resolve some defs at parsing
 640 // time (forward branches, phi functions for loops, etc...) resolve the
 641 // defs now...
 642 //
 643 static void
 644 ResolveDefinitions(ValueList &LateResolvers, ValueList *FutureLateResolvers) {
 645   // Loop over LateResolveDefs fixing up stuff that couldn't be resolved
 646   while (!LateResolvers.empty()) {
 647     Value *V = LateResolvers.back();
 648     LateResolvers.pop_back();
 649
 650     std::map<Value*, std::pair<ValID, int> >::iterator PHI =
 651       CurModule.PlaceHolderInfo.find(V);
 652     assert(PHI != CurModule.PlaceHolderInfo.end() && "Placeholder error!");
 653
 654     ValID &DID = PHI->second.first;
 655
 656     Value *TheRealValue = getExistingVal(V->getType(), DID);
 657     if (TriggerError)
 658       return;
 659     if (TheRealValue) {
 660       V->replaceAllUsesWith(TheRealValue);
 661       delete V;
 662       CurModule.PlaceHolderInfo.erase(PHI);
 663     } else if (FutureLateResolvers) {
 664       // Functions have their unresolved items forwarded to the module late
 665       // resolver table
 666       InsertValue(V, *FutureLateResolvers);
 667     } else {
 668       if (DID.Type == ValID::LocalName || DID.Type == ValID::GlobalName) {
 669         GenerateError("Reference to an invalid definition: '" +DID.getName()+
 670                        "' of type '" + V->getType()->getDescription() + "'",
 671                        PHI->second.second);
 672         return;
 673       } else {
 674         GenerateError("Reference to an invalid definition: #" +
 675                        itostr(DID.Num) + " of type '" +
 676                        V->getType()->getDescription() + "'",
 677                        PHI->second.second);
 678         return;
 679       }
 680     }
 681   }
 682   LateResolvers.clear();
 683 }
 684
 685 // ResolveTypeTo - A brand new type was just declared.  This means that (if
 686 // name is not null) things referencing Name can be resolved.  Otherwise, things
 687 // refering to the number can be resolved.  Do this now.
 688 //
 689 static void ResolveTypeTo(std::string *Name, const Type *ToTy) {
 690   ValID D;
 691   if (Name)
 692     D = ValID::createLocalName(*Name);
 693   else
 694     D = ValID::createLocalID(CurModule.Types.size());
 695
 696   std::map<ValID, PATypeHolder>::iterator I =
 697     CurModule.LateResolveTypes.find(D);
 698   if (I != CurModule.LateResolveTypes.end()) {
 699     ((DerivedType*)I->second.get())->refineAbstractTypeTo(ToTy);
 700     CurModule.LateResolveTypes.erase(I);
 701   }
 702 }
 703
 704 // setValueName - Set the specified value to the name given.  The name may be
 705 // null potentially, in which case this is a noop.  The string passed in is
 706 // assumed to be a malloc'd string buffer, and is free'd by this function.
 707 //
 708 static void setValueName(Value *V, std::string *NameStr) {
 709   if (!NameStr) return;
 710   std::string Name(*NameStr);      // Copy string
 711   delete NameStr;                  // Free old string
 712
 713   if (V->getType() == Type::VoidTy) {
 714     GenerateError("Can't assign name '" + Name+"' to value with void type");
 715     return;
 716   }
 717
 718   assert(inFunctionScope() && "Must be in function scope!");
 719   ValueSymbolTable &ST = CurFun.CurrentFunction->getValueSymbolTable();
 720   if (ST.lookup(Name)) {
 721     GenerateError("Redefinition of value '" + Name + "' of type '" +
 722                    V->getType()->getDescription() + "'");
 723     return;
 724   }
 725
 726   // Set the name.
 727   V->setName(Name);
 728 }
 729
 730 /// ParseGlobalVariable - Handle parsing of a global.  If Initializer is null,
 731 /// this is a declaration, otherwise it is a definition.
 732 static GlobalVariable *
 733 ParseGlobalVariable(std::string *NameStr,
 734                     GlobalValue::LinkageTypes Linkage,
 735                     GlobalValue::VisibilityTypes Visibility,
 736                     bool isConstantGlobal, const Type *Ty,
 737                     Constant *Initializer, bool IsThreadLocal) {
 738   if (isa<FunctionType>(Ty)) {
 739     GenerateError("Cannot declare global vars of function type");
 740     return 0;
 741   }
 742
 743   const PointerType *PTy = PointerType::get(Ty);
 744
 745   std::string Name;
 746   if (NameStr) {
 747     Name = *NameStr;      // Copy string
 748     delete NameStr;       // Free old string
 749   }
 750
 751   // See if this global value was forward referenced.  If so, recycle the
 752   // object.
 753   ValID ID;
 754   if (!Name.empty()) {
 755     ID = ValID::createGlobalName(Name);
 756   } else {
 757     ID = ValID::createGlobalID(CurModule.Values.size());
 758   }
 759
 760   if (GlobalValue *FWGV = CurModule.GetForwardRefForGlobal(PTy, ID)) {
 761     // Move the global to the end of the list, from whereever it was
 762     // previously inserted.
 763     GlobalVariable *GV = cast<GlobalVariable>(FWGV);
 764     CurModule.CurrentModule->getGlobalList().remove(GV);
 765     CurModule.CurrentModule->getGlobalList().push_back(GV);
 766     GV->setInitializer(Initializer);
 767     GV->setLinkage(Linkage);
 768     GV->setVisibility(Visibility);
 769     GV->setConstant(isConstantGlobal);
 770     GV->setThreadLocal(IsThreadLocal);
 771     InsertValue(GV, CurModule.Values);
 772     return GV;
 773   }
 774
 775   // If this global has a name
 776   if (!Name.empty()) {
 777     // if the global we're parsing has an initializer (is a definition) and
 778     // has external linkage.
 779     if (Initializer && Linkage != GlobalValue::InternalLinkage)
 780       // If there is already a global with external linkage with this name
 781       if (CurModule.CurrentModule->getGlobalVariable(Name, false)) {
 782         // If we allow this GVar to get created, it will be renamed in the
 783         // symbol table because it conflicts with an existing GVar. We can't
 784         // allow redefinition of GVars whose linking indicates that their name
 785         // must stay the same. Issue the error.
 786         GenerateError("Redefinition of global variable named '" + Name +
 787                        "' of type '" + Ty->getDescription() + "'");
 788         return 0;
 789       }
 790   }
 791
 792   // Otherwise there is no existing GV to use, create one now.
 793   GlobalVariable *GV =
 794     new GlobalVariable(Ty, isConstantGlobal, Linkage, Initializer, Name,
 795                        CurModule.CurrentModule, IsThreadLocal);
 796   GV->setVisibility(Visibility);
 797   InsertValue(GV, CurModule.Values);
 798   return GV;
 799 }
 800
 801 // setTypeName - Set the specified type to the name given.  The name may be
 802 // null potentially, in which case this is a noop.  The string passed in is
 803 // assumed to be a malloc'd string buffer, and is freed by this function.
 804 //
 805 // This function returns true if the type has already been defined, but is
 806 // allowed to be redefined in the specified context.  If the name is a new name
 807 // for the type plane, it is inserted and false is returned.
 808 static bool setTypeName(const Type *T, std::string *NameStr) {
 809   assert(!inFunctionScope() && "Can't give types function-local names!");
 810   if (NameStr == 0) return false;
 811
 812   std::string Name(*NameStr);      // Copy string
 813   delete NameStr;                  // Free old string
 814
 815   // We don't allow assigning names to void type
 816   if (T == Type::VoidTy) {
 817     GenerateError("Can't assign name '" + Name + "' to the void type");
 818     return false;
 819   }
 820
 821   // Set the type name, checking for conflicts as we do so.
 822   bool AlreadyExists = CurModule.CurrentModule->addTypeName(Name, T);
 823
 824   if (AlreadyExists) {   // Inserting a name that is already defined???
 825     const Type *Existing = CurModule.CurrentModule->getTypeByName(Name);
 826     assert(Existing && "Conflict but no matching type?!");
 827
 828     // There is only one case where this is allowed: when we are refining an
 829     // opaque type.  In this case, Existing will be an opaque type.
 830     if (const OpaqueType *OpTy = dyn_cast<OpaqueType>(Existing)) {
 831       // We ARE replacing an opaque type!
 832       const_cast<OpaqueType*>(OpTy)->refineAbstractTypeTo(T);
 833       return true;
 834     }
 835
 836     // Otherwise, this is an attempt to redefine a type. That's okay if
 837     // the redefinition is identical to the original. This will be so if
 838     // Existing and T point to the same Type object. In this one case we
 839     // allow the equivalent redefinition.
 840     if (Existing == T) return true;  // Yes, it's equal.
 841
 842     // Any other kind of (non-equivalent) redefinition is an error.
 843     GenerateError("Redefinition of type named '" + Name + "' of type '" +
 844                    T->getDescription() + "'");
 845   }
 846
 847   return false;
 848 }
 849
 850 //===----------------------------------------------------------------------===//
 851 // Code for handling upreferences in type names...
 852 //
 853
 854 // TypeContains - Returns true if Ty directly contains E in it.
 855 //
 856 static bool TypeContains(const Type *Ty, const Type *E) {
 857   return std::find(Ty->subtype_begin(), Ty->subtype_end(),
 858                    E) != Ty->subtype_end();
 859 }
 860
 861 namespace {
 862   struct UpRefRecord {
 863     // NestingLevel - The number of nesting levels that need to be popped before
 864     // this type is resolved.
 865     unsigned NestingLevel;
 866
 867     // LastContainedTy - This is the type at the current binding level for the
 868     // type.  Every time we reduce the nesting level, this gets updated.
 869     const Type *LastContainedTy;
 870
 871     // UpRefTy - This is the actual opaque type that the upreference is
 872     // represented with.
 873     OpaqueType *UpRefTy;
 874
 875     UpRefRecord(unsigned NL, OpaqueType *URTy)
 876       : NestingLevel(NL), LastContainedTy(URTy), UpRefTy(URTy) {}
 877   };
 878 }
 879
 880 // UpRefs - A list of the outstanding upreferences that need to be resolved.
 881 static std::vector<UpRefRecord> UpRefs;
 882
 883 /// HandleUpRefs - Every time we finish a new layer of types, this function is
 884 /// called.  It loops through the UpRefs vector, which is a list of the
 885 /// currently active types.  For each type, if the up reference is contained in
 886 /// the newly completed type, we decrement the level count.  When the level
 887 /// count reaches zero, the upreferenced type is the type that is passed in:
 888 /// thus we can complete the cycle.
 889 ///
 890 static PATypeHolder HandleUpRefs(const Type *ty) {
 891   // If Ty isn't abstract, or if there are no up-references in it, then there is
 892   // nothing to resolve here.
 893   if (!ty->isAbstract() || UpRefs.empty()) return ty;
 894
 895   PATypeHolder Ty(ty);
 896   UR_OUT("Type '" << Ty->getDescription() <<
 897          "' newly formed.  Resolving upreferences.\n" <<
 898          UpRefs.size() << " upreferences active!\n");
 899
 900   // If we find any resolvable upreferences (i.e., those whose NestingLevel goes
 901   // to zero), we resolve them all together before we resolve them to Ty.  At
 902   // the end of the loop, if there is anything to resolve to Ty, it will be in
 903   // this variable.
 904   OpaqueType *TypeToResolve = 0;
 905
 906   for (unsigned i = 0; i != UpRefs.size(); ++i) {
 907     UR_OUT("  UR#" << i << " - TypeContains(" << Ty->getDescription() << ", "
 908            << UpRefs[i].second->getDescription() << ") = "
 909            << (TypeContains(Ty, UpRefs[i].second) ? "true" : "false") << "\n");
 910     if (TypeContains(Ty, UpRefs[i].LastContainedTy)) {
 911       // Decrement level of upreference
 912       unsigned Level = --UpRefs[i].NestingLevel;
 913       UpRefs[i].LastContainedTy = Ty;
 914       UR_OUT("  Uplevel Ref Level = " << Level << "\n");
 915       if (Level == 0) {                     // Upreference should be resolved!
 916         if (!TypeToResolve) {
 917           TypeToResolve = UpRefs[i].UpRefTy;
 918         } else {
 919           UR_OUT("  * Resolving upreference for "
 920                  << UpRefs[i].second->getDescription() << "\n";
 921                  std::string OldName = UpRefs[i].UpRefTy->getDescription());
 922           UpRefs[i].UpRefTy->refineAbstractTypeTo(TypeToResolve);
 923           UR_OUT("  * Type '" << OldName << "' refined upreference to: "
 924                  << (const void*)Ty << ", " << Ty->getDescription() << "\n");
 925         }
 926         UpRefs.erase(UpRefs.begin()+i);     // Remove from upreference list...
 927         --i;                                // Do not skip the next element...
 928       }
 929     }
 930   }
 931
 932   if (TypeToResolve) {
 933     UR_OUT("  * Resolving upreference for "
 934            << UpRefs[i].second->getDescription() << "\n";
 935            std::string OldName = TypeToResolve->getDescription());
 936     TypeToResolve->refineAbstractTypeTo(Ty);
 937   }
 938
 939   return Ty;
 940 }
 941
 942 //===----------------------------------------------------------------------===//
 943 //            RunVMAsmParser - Define an interface to this parser
 944 //===----------------------------------------------------------------------===//
 945 //
 946 static Module* RunParser(Module * M);
 947
 948 Module *llvm::RunVMAsmParser(const std::string &Filename, FILE *F) {
 949   set_scan_file(F);
 950
 951   CurFilename = Filename;
 952   return RunParser(new Module(CurFilename));
 953 }
 954
 955 Module *llvm::RunVMAsmParser(const char * AsmString, Module * M) {
 956   set_scan_string(AsmString);
 957
 958   CurFilename = "from_memory";
 959   if (M == NULL) {
 960     return RunParser(new Module (CurFilename));
 961   } else {
 962     return RunParser(M);
 963   }
 964 }
 965
 966 %}
 967
 968 %union {
 969   llvm::Module                           *ModuleVal;
 970   llvm::Function                         *FunctionVal;
 971   llvm::BasicBlock                       *BasicBlockVal;
 972   llvm::TerminatorInst                   *TermInstVal;
 973   llvm::Instruction                      *InstVal;
 974   llvm::Constant                         *ConstVal;
 975
 976   const llvm::Type                       *PrimType;
 977   std::list<llvm::PATypeHolder>          *TypeList;
 978   llvm::PATypeHolder                     *TypeVal;
 979   llvm::Value                            *ValueVal;
 980   std::vector<llvm::Value*>              *ValueList;
 981   llvm::ArgListType                      *ArgList;
 982   llvm::TypeWithAttrs                     TypeWithAttrs;
 983   llvm::TypeWithAttrsList                *TypeWithAttrsList;
 984   llvm::ValueRefList                     *ValueRefList;
 985
 986   // Represent the RHS of PHI node
 987   std::list<std::pair<llvm::Value*,
 988                       llvm::BasicBlock*> > *PHIList;
 989   std::vector<std::pair<llvm::Constant*, llvm::BasicBlock*> > *JumpTable;
 990   std::vector<llvm::Constant*>           *ConstVector;
 991
 992   llvm::GlobalValue::LinkageTypes         Linkage;
 993   llvm::GlobalValue::VisibilityTypes      Visibility;
 994   uint16_t                          ParamAttrs;
 995   llvm::APInt                       *APIntVal;
 996   int64_t                           SInt64Val;
 997   uint64_t                          UInt64Val;
 998   int                               SIntVal;
 999   unsigned                          UIntVal;
1000   llvm::APFloat                    *FPVal;
1001   bool                              BoolVal;
1002
1003   std::string                      *StrVal;   // This memory must be deleted
1004   llvm::ValID                       ValIDVal;
1005
1006   llvm::Instruction::BinaryOps      BinaryOpVal;
1007   llvm::Instruction::TermOps        TermOpVal;
1008   llvm::Instruction::MemoryOps      MemOpVal;
1009   llvm::Instruction::CastOps        CastOpVal;
1010   llvm::Instruction::OtherOps       OtherOpVal;
1011   llvm::ICmpInst::Predicate         IPredicate;
1012   llvm::FCmpInst::Predicate         FPredicate;
1013 }
1014
1015 %type <ModuleVal>     Module
1016 %type <FunctionVal>   Function FunctionProto FunctionHeader BasicBlockList
1017 %type <BasicBlockVal> BasicBlock InstructionList
1018 %type <TermInstVal>   BBTerminatorInst
1019 %type <InstVal>       Inst InstVal MemoryInst
1020 %type <ConstVal>      ConstVal ConstExpr AliaseeRef
1021 %type <ConstVector>   ConstVector
1022 %type <ArgList>       ArgList ArgListH
1023 %type <PHIList>       PHIList
1024 %type <ValueRefList>  ValueRefList      // For call param lists & GEP indices
1025 %type <ValueList>     IndexList         // For GEP indices
1026 %type <TypeList>      TypeListI
1027 %type <TypeWithAttrsList> ArgTypeList ArgTypeListI
1028 %type <TypeWithAttrs> ArgType
1029 %type <JumpTable>     JumpTable
1030 %type <BoolVal>       GlobalType                  // GLOBAL or CONSTANT?
1031 %type <BoolVal>       ThreadLocal                 // 'thread_local' or not
1032 %type <BoolVal>       OptVolatile                 // 'volatile' or not
1033 %type <BoolVal>       OptTailCall                 // TAIL CALL or plain CALL.
1034 %type <BoolVal>       OptSideEffect               // 'sideeffect' or not.
1035 %type <Linkage>       GVInternalLinkage GVExternalLinkage
1036 %type <Linkage>       FunctionDefineLinkage FunctionDeclareLinkage
1037 %type <Linkage>       AliasLinkage
1038 %type <Visibility>    GVVisibilityStyle
1039
1040 // ValueRef - Unresolved reference to a definition or BB
1041 %type <ValIDVal>      ValueRef ConstValueRef SymbolicValueRef
1042 %type <ValueVal>      ResolvedVal            // <type> <valref> pair
1043 // Tokens and types for handling constant integer values
1044 //
1045 // ESINT64VAL - A negative number within long long range
1046 %token <SInt64Val> ESINT64VAL
1047
1048 // EUINT64VAL - A positive number within uns. long long range
1049 %token <UInt64Val> EUINT64VAL
1050
1051 // ESAPINTVAL - A negative number with arbitrary precision
1052 %token <APIntVal>  ESAPINTVAL
1053
1054 // EUAPINTVAL - A positive number with arbitrary precision
1055 %token <APIntVal>  EUAPINTVAL
1056
1057 %token  <UIntVal>   LOCALVAL_ID GLOBALVAL_ID  // %123 @123
1058 %token  <FPVal>     FPVAL     // Float or Double constant
1059
1060 // Built in types...
1061 %type  <TypeVal> Types ResultTypes
1062 %type  <PrimType> IntType FPType PrimType           // Classifications
1063 %token <PrimType> VOID INTTYPE
1064 %token <PrimType> FLOAT DOUBLE X86_FP80 FP128 PPC_FP128 LABEL
1065 %token TYPE
1066
1067
1068 %token<StrVal> LOCALVAR GLOBALVAR LABELSTR
1069 %token<StrVal> STRINGCONSTANT ATSTRINGCONSTANT PCTSTRINGCONSTANT
1070 %type <StrVal> LocalName OptLocalName OptLocalAssign
1071 %type <StrVal> GlobalName OptGlobalAssign GlobalAssign
1072 %type <StrVal> OptSection SectionString
1073
1074 %type <UIntVal> OptAlign OptCAlign
1075
1076 %token ZEROINITIALIZER TRUETOK FALSETOK BEGINTOK ENDTOK
1077 %token DECLARE DEFINE GLOBAL CONSTANT SECTION ALIAS VOLATILE THREAD_LOCAL
1078 %token TO DOTDOTDOT NULL_TOK UNDEF INTERNAL LINKONCE WEAK APPENDING
1079 %token DLLIMPORT DLLEXPORT EXTERN_WEAK
1080 %token OPAQUE EXTERNAL TARGET TRIPLE ALIGN
1081 %token DEPLIBS CALL TAIL ASM_TOK MODULE SIDEEFFECT
1082 %token CC_TOK CCC_TOK FASTCC_TOK COLDCC_TOK X86_STDCALLCC_TOK X86_FASTCALLCC_TOK
1083 %token DATALAYOUT
1084 %type <UIntVal> OptCallingConv
1085 %type <ParamAttrs> OptParamAttrs ParamAttr
1086 %type <ParamAttrs> OptFuncAttrs  FuncAttr
1087
1088 // Basic Block Terminating Operators
1089 %token <TermOpVal> RET BR SWITCH INVOKE UNWIND UNREACHABLE
1090
1091 // Binary Operators
1092 %type  <BinaryOpVal> ArithmeticOps LogicalOps // Binops Subcatagories
1093 %token <BinaryOpVal> ADD SUB MUL UDIV SDIV FDIV UREM SREM FREM AND OR XOR
1094 %token <BinaryOpVal> SHL LSHR ASHR
1095
1096 %token <OtherOpVal> ICMP FCMP
1097 %type  <IPredicate> IPredicates
1098 %type  <FPredicate> FPredicates
1099 %token  EQ NE SLT SGT SLE SGE ULT UGT ULE UGE
1100 %token  OEQ ONE OLT OGT OLE OGE ORD UNO UEQ UNE
1101
1102 // Memory Instructions
1103 %token <MemOpVal> MALLOC ALLOCA FREE LOAD STORE GETELEMENTPTR
1104
1105 // Cast Operators
1106 %type <CastOpVal> CastOps
1107 %token <CastOpVal> TRUNC ZEXT SEXT FPTRUNC FPEXT BITCAST
1108 %token <CastOpVal> UITOFP SITOFP FPTOUI FPTOSI INTTOPTR PTRTOINT
1109
1110 // Other Operators
1111 %token <OtherOpVal> PHI_TOK SELECT VAARG
1112 %token <OtherOpVal> EXTRACTELEMENT INSERTELEMENT SHUFFLEVECTOR
1113
1114 // Function Attributes
1115 %token SIGNEXT ZEROEXT NORETURN INREG SRET NOUNWIND NOALIAS BYVAL NEST
1116
1117 // Visibility Styles
1118 %token DEFAULT HIDDEN PROTECTED
1119
1120 %start Module
1121 %%
1122
1123
1124 // Operations that are notably excluded from this list include:
1125 // RET, BR, & SWITCH because they end basic blocks and are treated specially.
1126 //
1127 ArithmeticOps: ADD | SUB | MUL | UDIV | SDIV | FDIV | UREM | SREM | FREM;
1128 LogicalOps   : SHL | LSHR | ASHR | AND | OR | XOR;
1129 CastOps      : TRUNC | ZEXT | SEXT | FPTRUNC | FPEXT | BITCAST |
1130                UITOFP | SITOFP | FPTOUI | FPTOSI | INTTOPTR | PTRTOINT;
1131
1132 IPredicates
1133   : EQ   { $$ = ICmpInst::ICMP_EQ; }  | NE   { $$ = ICmpInst::ICMP_NE; }
1134   | SLT  { $$ = ICmpInst::ICMP_SLT; } | SGT  { $$ = ICmpInst::ICMP_SGT; }
1135   | SLE  { $$ = ICmpInst::ICMP_SLE; } | SGE  { $$ = ICmpInst::ICMP_SGE; }
1136   | ULT  { $$ = ICmpInst::ICMP_ULT; } | UGT  { $$ = ICmpInst::ICMP_UGT; }
1137   | ULE  { $$ = ICmpInst::ICMP_ULE; } | UGE  { $$ = ICmpInst::ICMP_UGE; }
1138   ;
1139
1140 FPredicates
1141   : OEQ  { $$ = FCmpInst::FCMP_OEQ; } | ONE  { $$ = FCmpInst::FCMP_ONE; }
1142   | OLT  { $$ = FCmpInst::FCMP_OLT; } | OGT  { $$ = FCmpInst::FCMP_OGT; }
1143   | OLE  { $$ = FCmpInst::FCMP_OLE; } | OGE  { $$ = FCmpInst::FCMP_OGE; }
1144   | ORD  { $$ = FCmpInst::FCMP_ORD; } | UNO  { $$ = FCmpInst::FCMP_UNO; }
1145   | UEQ  { $$ = FCmpInst::FCMP_UEQ; } | UNE  { $$ = FCmpInst::FCMP_UNE; }
1146   | ULT  { $$ = FCmpInst::FCMP_ULT; } | UGT  { $$ = FCmpInst::FCMP_UGT; }
1147   | ULE  { $$ = FCmpInst::FCMP_ULE; } | UGE  { $$ = FCmpInst::FCMP_UGE; }
1148   | TRUETOK { $$ = FCmpInst::FCMP_TRUE; }
1149   | FALSETOK { $$ = FCmpInst::FCMP_FALSE; }
1150   ;
1151
1152 // These are some types that allow classification if we only want a particular
1153 // thing... for example, only a signed, unsigned, or integral type.
1154 IntType :  INTTYPE;
1155 FPType   : FLOAT | DOUBLE | PPC_FP128 | FP128 | X86_FP80;
1156
1157 LocalName : LOCALVAR | STRINGCONSTANT | PCTSTRINGCONSTANT ;
1158 OptLocalName : LocalName | /*empty*/ { $$ = 0; };
1159
1160 /// OptLocalAssign - Value producing statements have an optional assignment
1161 /// component.
1162 OptLocalAssign : LocalName '=' {
1163     $$ = $1;
1164     CHECK_FOR_ERROR
1165   }
1166   | /*empty*/ {
1167     $$ = 0;
1168     CHECK_FOR_ERROR
1169   };
1170
1171 GlobalName : GLOBALVAR | ATSTRINGCONSTANT ;
1172
1173 OptGlobalAssign : GlobalAssign
1174   | /*empty*/ {
1175     $$ = 0;
1176     CHECK_FOR_ERROR
1177   };
1178
1179 GlobalAssign : GlobalName '=' {
1180     $$ = $1;
1181     CHECK_FOR_ERROR
1182   };
1183
1184 GVInternalLinkage
1185   : INTERNAL    { $$ = GlobalValue::InternalLinkage; }
1186   | WEAK        { $$ = GlobalValue::WeakLinkage; }
1187   | LINKONCE    { $$ = GlobalValue::LinkOnceLinkage; }
1188   | APPENDING   { $$ = GlobalValue::AppendingLinkage; }
1189   | DLLEXPORT   { $$ = GlobalValue::DLLExportLinkage; }
1190   ;
1191
1192 GVExternalLinkage
1193   : DLLIMPORT   { $$ = GlobalValue::DLLImportLinkage; }
1194   | EXTERN_WEAK { $$ = GlobalValue::ExternalWeakLinkage; }
1195   | EXTERNAL    { $$ = GlobalValue::ExternalLinkage; }
1196   ;
1197
1198 GVVisibilityStyle
1199   : /*empty*/ { $$ = GlobalValue::DefaultVisibility;   }
1200   | DEFAULT   { $$ = GlobalValue::DefaultVisibility;   }
1201   | HIDDEN    { $$ = GlobalValue::HiddenVisibility;    }
1202   | PROTECTED { $$ = GlobalValue::ProtectedVisibility; }
1203   ;
1204
1205 FunctionDeclareLinkage
1206   : /*empty*/   { $$ = GlobalValue::ExternalLinkage; }
1207   | DLLIMPORT   { $$ = GlobalValue::DLLImportLinkage; }
1208   | EXTERN_WEAK { $$ = GlobalValue::ExternalWeakLinkage; }
1209   ;
1210
1211 FunctionDefineLinkage
1212   : /*empty*/   { $$ = GlobalValue::ExternalLinkage; }
1213   | INTERNAL    { $$ = GlobalValue::InternalLinkage; }
1214   | LINKONCE    { $$ = GlobalValue::LinkOnceLinkage; }
1215   | WEAK        { $$ = GlobalValue::WeakLinkage; }
1216   | DLLEXPORT   { $$ = GlobalValue::DLLExportLinkage; }
1217   ;
1218
1219 AliasLinkage
1220   : /*empty*/   { $$ = GlobalValue::ExternalLinkage; }
1221   | WEAK        { $$ = GlobalValue::WeakLinkage; }
1222   | INTERNAL    { $$ = GlobalValue::InternalLinkage; }
1223   ;
1224
1225 OptCallingConv : /*empty*/          { $$ = CallingConv::C; } |
1226                  CCC_TOK            { $$ = CallingConv::C; } |
1227                  FASTCC_TOK         { $$ = CallingConv::Fast; } |
1228                  COLDCC_TOK         { $$ = CallingConv::Cold; } |
1229                  X86_STDCALLCC_TOK  { $$ = CallingConv::X86_StdCall; } |
1230                  X86_FASTCALLCC_TOK { $$ = CallingConv::X86_FastCall; } |
1231                  CC_TOK EUINT64VAL  {
1232                    if ((unsigned)$2 != $2)
1233                      GEN_ERROR("Calling conv too large");
1234                    $$ = $2;
1235                   CHECK_FOR_ERROR
1236                  };
1237
1238 ParamAttr     : ZEROEXT { $$ = ParamAttr::ZExt;      }
1239               | ZEXT    { $$ = ParamAttr::ZExt;      }
1240               | SIGNEXT { $$ = ParamAttr::SExt;      }
1241               | SEXT    { $$ = ParamAttr::SExt;      }
1242               | INREG   { $$ = ParamAttr::InReg;     }
1243               | SRET    { $$ = ParamAttr::StructRet; }
1244               | NOALIAS { $$ = ParamAttr::NoAlias;   }
1245               | BYVAL   { $$ = ParamAttr::ByVal;     }
1246               | NEST    { $$ = ParamAttr::Nest;      }
1247               ;
1248
1249 OptParamAttrs : /* empty */  { $$ = ParamAttr::None; }
1250               | OptParamAttrs ParamAttr {
1251                 $$ = $1 | $2;
1252               }
1253               ;
1254
1255 FuncAttr      : NORETURN { $$ = ParamAttr::NoReturn; }
1256               | NOUNWIND { $$ = ParamAttr::NoUnwind; }
1257               | ZEROEXT  { $$ = ParamAttr::ZExt;     }
1258               | SIGNEXT  { $$ = ParamAttr::SExt;     }
1259               ;
1260
1261 OptFuncAttrs  : /* empty */ { $$ = ParamAttr::None; }
1262               | OptFuncAttrs FuncAttr {
1263                 $$ = $1 | $2;
1264               }
1265               ;
1266
1267 // OptAlign/OptCAlign - An optional alignment, and an optional alignment with
1268 // a comma before it.
1269 OptAlign : /*empty*/        { $$ = 0; } |
1270            ALIGN EUINT64VAL {
1271   $$ = $2;
1272   if ($$ != 0 && !isPowerOf2_32($$))
1273     GEN_ERROR("Alignment must be a power of two");
1274   CHECK_FOR_ERROR
1275 };
1276 OptCAlign : /*empty*/            { $$ = 0; } |
1277             ',' ALIGN EUINT64VAL {
1278   $$ = $3;
1279   if ($$ != 0 && !isPowerOf2_32($$))
1280     GEN_ERROR("Alignment must be a power of two");
1281   CHECK_FOR_ERROR
1282 };
1283
1284
1285 SectionString : SECTION STRINGCONSTANT {
1286   for (unsigned i = 0, e = $2->length(); i != e; ++i)
1287     if ((*$2)[i] == '"' || (*$2)[i] == '\\')
1288       GEN_ERROR("Invalid character in section name");
1289   $$ = $2;
1290   CHECK_FOR_ERROR
1291 };
1292
1293 OptSection : /*empty*/ { $$ = 0; } |
1294              SectionString { $$ = $1; };
1295
1296 // GlobalVarAttributes - Used to pass the attributes string on a global.  CurGV
1297 // is set to be the global we are processing.
1298 //
1299 GlobalVarAttributes : /* empty */ {} |
1300                      ',' GlobalVarAttribute GlobalVarAttributes {};
1301 GlobalVarAttribute : SectionString {
1302     CurGV->setSection(*$1);
1303     delete $1;
1304     CHECK_FOR_ERROR
1305   }
1306   | ALIGN EUINT64VAL {
1307     if ($2 != 0 && !isPowerOf2_32($2))
1308       GEN_ERROR("Alignment must be a power of two");
1309     CurGV->setAlignment($2);
1310     CHECK_FOR_ERROR
1311   };
1312
1313 //===----------------------------------------------------------------------===//
1314 // Types includes all predefined types... except void, because it can only be
1315 // used in specific contexts (function returning void for example).
1316
1317 // Derived types are added later...
1318 //
1319 PrimType : INTTYPE | FLOAT | DOUBLE | PPC_FP128 | FP128 | X86_FP80 | LABEL ;
1320
1321 Types
1322   : OPAQUE {
1323     $$ = new PATypeHolder(OpaqueType::get());
1324     CHECK_FOR_ERROR
1325   }
1326   | PrimType {
1327     $$ = new PATypeHolder($1);
1328     CHECK_FOR_ERROR
1329   }
1330   | Types '*' {                             // Pointer type?
1331     if (*$1 == Type::LabelTy)
1332       GEN_ERROR("Cannot form a pointer to a basic block");
1333     $$ = new PATypeHolder(HandleUpRefs(PointerType::get(*$1)));
1334     delete $1;
1335     CHECK_FOR_ERROR
1336   }
1337   | SymbolicValueRef {            // Named types are also simple types...
1338     const Type* tmp = getTypeVal($1);
1339     CHECK_FOR_ERROR
1340     $$ = new PATypeHolder(tmp);
1341   }
1342   | '\\' EUINT64VAL {                   // Type UpReference
1343     if ($2 > (uint64_t)~0U) GEN_ERROR("Value out of range");
1344     OpaqueType *OT = OpaqueType::get();        // Use temporary placeholder
1345     UpRefs.push_back(UpRefRecord((unsigned)$2, OT));  // Add to vector...
1346     $$ = new PATypeHolder(OT);
1347     UR_OUT("New Upreference!\n");
1348     CHECK_FOR_ERROR
1349   }
1350   | Types '(' ArgTypeListI ')' OptFuncAttrs {
1351     std::vector<const Type*> Params;
1352     ParamAttrsVector Attrs;
1353     if ($5 != ParamAttr::None) {
1354       ParamAttrsWithIndex X; X.index = 0; X.attrs = $5;
1355       Attrs.push_back(X);
1356     }
1357     unsigned index = 1;
1358     TypeWithAttrsList::iterator I = $3->begin(), E = $3->end();
1359     for (; I != E; ++I, ++index) {
1360       const Type *Ty = I->Ty->get();
1361       Params.push_back(Ty);
1362       if (Ty != Type::VoidTy)
1363         if (I->Attrs != ParamAttr::None) {
1364           ParamAttrsWithIndex X; X.index = index; X.attrs = I->Attrs;
1365           Attrs.push_back(X);
1366         }
1367     }
1368     bool isVarArg = Params.size() && Params.back() == Type::VoidTy;
1369     if (isVarArg) Params.pop_back();
1370
1371     ParamAttrsList *ActualAttrs = 0;
1372     if (!Attrs.empty())
1373       ActualAttrs = ParamAttrsList::get(Attrs);
1374     FunctionType *FT = FunctionType::get(*$1, Params, isVarArg, ActualAttrs);
1375     delete $3;   // Delete the argument list
1376     delete $1;   // Delete the return type handle
1377     $$ = new PATypeHolder(HandleUpRefs(FT));
1378     CHECK_FOR_ERROR
1379   }
1380   | VOID '(' ArgTypeListI ')' OptFuncAttrs {
1381     std::vector<const Type*> Params;
1382     ParamAttrsVector Attrs;
1383     if ($5 != ParamAttr::None) {
1384       ParamAttrsWithIndex X; X.index = 0; X.attrs = $5;
1385       Attrs.push_back(X);
1386     }
1387     TypeWithAttrsList::iterator I = $3->begin(), E = $3->end();
1388     unsigned index = 1;
1389     for ( ; I != E; ++I, ++index) {
1390       const Type* Ty = I->Ty->get();
1391       Params.push_back(Ty);
1392       if (Ty != Type::VoidTy)
1393         if (I->Attrs != ParamAttr::None) {
1394           ParamAttrsWithIndex X; X.index = index; X.attrs = I->Attrs;
1395           Attrs.push_back(X);
1396         }
1397     }
1398     bool isVarArg = Params.size() && Params.back() == Type::VoidTy;
1399     if (isVarArg) Params.pop_back();
1400
1401     ParamAttrsList *ActualAttrs = 0;
1402     if (!Attrs.empty())
1403       ActualAttrs = ParamAttrsList::get(Attrs);
1404
1405     FunctionType *FT = FunctionType::get($1, Params, isVarArg, ActualAttrs);
1406     delete $3;      // Delete the argument list
1407     $$ = new PATypeHolder(HandleUpRefs(FT));
1408     CHECK_FOR_ERROR
1409   }
1410
1411   | '[' EUINT64VAL 'x' Types ']' {          // Sized array type?
1412     $$ = new PATypeHolder(HandleUpRefs(ArrayType::get(*$4, (unsigned)$2)));
1413     delete $4;
1414     CHECK_FOR_ERROR
1415   }
1416   | '<' EUINT64VAL 'x' Types '>' {          // Vector type?
1417      const llvm::Type* ElemTy = $4->get();
1418      if ((unsigned)$2 != $2)
1419         GEN_ERROR("Unsigned result not equal to signed result");
1420      if (!ElemTy->isFloatingPoint() && !ElemTy->isInteger())
1421         GEN_ERROR("Element type of a VectorType must be primitive");
1422      if (!isPowerOf2_32($2))
1423        GEN_ERROR("Vector length should be a power of 2");
1424      $$ = new PATypeHolder(HandleUpRefs(VectorType::get(*$4, (unsigned)$2)));
1425      delete $4;
1426      CHECK_FOR_ERROR
1427   }
1428   | '{' TypeListI '}' {                        // Structure type?
1429     std::vector<const Type*> Elements;
1430     for (std::list<llvm::PATypeHolder>::iterator I = $2->begin(),
1431            E = $2->end(); I != E; ++I)
1432       Elements.push_back(*I);
1433
1434     $$ = new PATypeHolder(HandleUpRefs(StructType::get(Elements)));
1435     delete $2;
1436     CHECK_FOR_ERROR
1437   }
1438   | '{' '}' {                                  // Empty structure type?
1439     $$ = new PATypeHolder(StructType::get(std::vector<const Type*>()));
1440     CHECK_FOR_ERROR
1441   }
1442   | '<' '{' TypeListI '}' '>' {
1443     std::vector<const Type*> Elements;
1444     for (std::list<llvm::PATypeHolder>::iterator I = $3->begin(),
1445            E = $3->end(); I != E; ++I)
1446       Elements.push_back(*I);
1447
1448     $$ = new PATypeHolder(HandleUpRefs(StructType::get(Elements, true)));
1449     delete $3;
1450     CHECK_FOR_ERROR
1451   }
1452   | '<' '{' '}' '>' {                         // Empty structure type?
1453     $$ = new PATypeHolder(StructType::get(std::vector<const Type*>(), true));
1454     CHECK_FOR_ERROR
1455   }
1456   ;
1457
1458 ArgType
1459   : Types OptParamAttrs {
1460     $$.Ty = $1;
1461     $$.Attrs = $2;
1462   }
1463   ;
1464
1465 ResultTypes
1466   : Types {
1467     if (!UpRefs.empty())
1468       GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
1469     if (!(*$1)->isFirstClassType())
1470       GEN_ERROR("LLVM functions cannot return aggregate types");
1471     $$ = $1;
1472   }
1473   | VOID {
1474     $$ = new PATypeHolder(Type::VoidTy);
1475   }
1476   ;
1477
1478 ArgTypeList : ArgType {
1479     $$ = new TypeWithAttrsList();
1480     $$->push_back($1);
1481     CHECK_FOR_ERROR
1482   }
1483   | ArgTypeList ',' ArgType {
1484     ($$=$1)->push_back($3);
1485     CHECK_FOR_ERROR
1486   }
1487   ;
1488
1489 ArgTypeListI
1490   : ArgTypeList
1491   | ArgTypeList ',' DOTDOTDOT {
1492     $$=$1;
1493     TypeWithAttrs TWA; TWA.Attrs = ParamAttr::None;
1494     TWA.Ty = new PATypeHolder(Type::VoidTy);
1495     $$->push_back(TWA);
1496     CHECK_FOR_ERROR
1497   }
1498   | DOTDOTDOT {
1499     $$ = new TypeWithAttrsList;
1500     TypeWithAttrs TWA; TWA.Attrs = ParamAttr::None;
1501     TWA.Ty = new PATypeHolder(Type::VoidTy);
1502     $$->push_back(TWA);
1503     CHECK_FOR_ERROR
1504   }
1505   | /*empty*/ {
1506     $$ = new TypeWithAttrsList();
1507     CHECK_FOR_ERROR
1508   };
1509
1510 // TypeList - Used for struct declarations and as a basis for function type
1511 // declaration type lists
1512 //
1513 TypeListI : Types {
1514     $$ = new std::list<PATypeHolder>();
1515     $$->push_back(*$1);
1516     delete $1;
1517     CHECK_FOR_ERROR
1518   }
1519   | TypeListI ',' Types {
1520     ($$=$1)->push_back(*$3);
1521     delete $3;
1522     CHECK_FOR_ERROR
1523   };
1524
1525 // ConstVal - The various declarations that go into the constant pool.  This
1526 // production is used ONLY to represent constants that show up AFTER a 'const',
1527 // 'constant' or 'global' token at global scope.  Constants that can be inlined
1528 // into other expressions (such as integers and constexprs) are handled by the
1529 // ResolvedVal, ValueRef and ConstValueRef productions.
1530 //
1531 ConstVal: Types '[' ConstVector ']' { // Nonempty unsized arr
1532     if (!UpRefs.empty())
1533       GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
1534     const ArrayType *ATy = dyn_cast<ArrayType>($1->get());
1535     if (ATy == 0)
1536       GEN_ERROR("Cannot make array constant with type: '" +
1537                      (*$1)->getDescription() + "'");
1538     const Type *ETy = ATy->getElementType();
1539     int NumElements = ATy->getNumElements();
1540
1541     // Verify that we have the correct size...
1542     if (NumElements != -1 && NumElements != (int)$3->size())
1543       GEN_ERROR("Type mismatch: constant sized array initialized with " +
1544                      utostr($3->size()) +  " arguments, but has size of " +
1545                      itostr(NumElements) + "");
1546
1547     // Verify all elements are correct type!
1548     for (unsigned i = 0; i < $3->size(); i++) {
1549       if (ETy != (*$3)[i]->getType())
1550         GEN_ERROR("Element #" + utostr(i) + " is not of type '" +
1551                        ETy->getDescription() +"' as required!\nIt is of type '"+
1552                        (*$3)[i]->getType()->getDescription() + "'.");
1553     }
1554
1555     $$ = ConstantArray::get(ATy, *$3);
1556     delete $1; delete $3;
1557     CHECK_FOR_ERROR
1558   }
1559   | Types '[' ']' {
1560     if (!UpRefs.empty())
1561       GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
1562     const ArrayType *ATy = dyn_cast<ArrayType>($1->get());
1563     if (ATy == 0)
1564       GEN_ERROR("Cannot make array constant with type: '" +
1565                      (*$1)->getDescription() + "'");
1566
1567     int NumElements = ATy->getNumElements();
1568     if (NumElements != -1 && NumElements != 0)
1569       GEN_ERROR("Type mismatch: constant sized array initialized with 0"
1570                      " arguments, but has size of " + itostr(NumElements) +"");
1571     $$ = ConstantArray::get(ATy, std::vector<Constant*>());
1572     delete $1;
1573     CHECK_FOR_ERROR
1574   }
1575   | Types 'c' STRINGCONSTANT {
1576     if (!UpRefs.empty())
1577       GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
1578     const ArrayType *ATy = dyn_cast<ArrayType>($1->get());
1579     if (ATy == 0)
1580       GEN_ERROR("Cannot make array constant with type: '" +
1581                      (*$1)->getDescription() + "'");
1582
1583     int NumElements = ATy->getNumElements();
1584     const Type *ETy = ATy->getElementType();
1585     if (NumElements != -1 && NumElements != int($3->length()))
1586       GEN_ERROR("Can't build string constant of size " +
1587                      itostr((int)($3->length())) +
1588                      " when array has size " + itostr(NumElements) + "");
1589     std::vector<Constant*> Vals;
1590     if (ETy == Type::Int8Ty) {
1591       for (unsigned i = 0; i < $3->length(); ++i)
1592         Vals.push_back(ConstantInt::get(ETy, (*$3)[i]));
1593     } else {
1594       delete $3;
1595       GEN_ERROR("Cannot build string arrays of non byte sized elements");
1596     }
1597     delete $3;
1598     $$ = ConstantArray::get(ATy, Vals);
1599     delete $1;
1600     CHECK_FOR_ERROR
1601   }
1602   | Types '<' ConstVector '>' { // Nonempty unsized arr
1603     if (!UpRefs.empty())
1604       GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
1605     const VectorType *PTy = dyn_cast<VectorType>($1->get());
1606     if (PTy == 0)
1607       GEN_ERROR("Cannot make packed constant with type: '" +
1608                      (*$1)->getDescription() + "'");
1609     const Type *ETy = PTy->getElementType();
1610     int NumElements = PTy->getNumElements();
1611
1612     // Verify that we have the correct size...
1613     if (NumElements != -1 && NumElements != (int)$3->size())
1614       GEN_ERROR("Type mismatch: constant sized packed initialized with " +
1615                      utostr($3->size()) +  " arguments, but has size of " +
1616                      itostr(NumElements) + "");
1617
1618     // Verify all elements are correct type!
1619     for (unsigned i = 0; i < $3->size(); i++) {
1620       if (ETy != (*$3)[i]->getType())
1621         GEN_ERROR("Element #" + utostr(i) + " is not of type '" +
1622            ETy->getDescription() +"' as required!\nIt is of type '"+
1623            (*$3)[i]->getType()->getDescription() + "'.");
1624     }
1625
1626     $$ = ConstantVector::get(PTy, *$3);
1627     delete $1; delete $3;
1628     CHECK_FOR_ERROR
1629   }
1630   | Types '{' ConstVector '}' {
1631     const StructType *STy = dyn_cast<StructType>($1->get());
1632     if (STy == 0)
1633       GEN_ERROR("Cannot make struct constant with type: '" +
1634                      (*$1)->getDescription() + "'");
1635
1636     if ($3->size() != STy->getNumContainedTypes())
1637       GEN_ERROR("Illegal number of initializers for structure type");
1638
1639     // Check to ensure that constants are compatible with the type initializer!
1640     for (unsigned i = 0, e = $3->size(); i != e; ++i)
1641       if ((*$3)[i]->getType() != STy->getElementType(i))
1642         GEN_ERROR("Expected type '" +
1643                        STy->getElementType(i)->getDescription() +
1644                        "' for element #" + utostr(i) +
1645                        " of structure initializer");
1646
1647     // Check to ensure that Type is not packed
1648     if (STy->isPacked())
1649       GEN_ERROR("Unpacked Initializer to vector type '" +
1650                 STy->getDescription() + "'");
1651
1652     $$ = ConstantStruct::get(STy, *$3);
1653     delete $1; delete $3;
1654     CHECK_FOR_ERROR
1655   }
1656   | Types '{' '}' {
1657     if (!UpRefs.empty())
1658       GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
1659     const StructType *STy = dyn_cast<StructType>($1->get());
1660     if (STy == 0)
1661       GEN_ERROR("Cannot make struct constant with type: '" +
1662                      (*$1)->getDescription() + "'");
1663
1664     if (STy->getNumContainedTypes() != 0)
1665       GEN_ERROR("Illegal number of initializers for structure type");
1666
1667     // Check to ensure that Type is not packed
1668     if (STy->isPacked())
1669       GEN_ERROR("Unpacked Initializer to vector type '" +
1670                 STy->getDescription() + "'");
1671
1672     $$ = ConstantStruct::get(STy, std::vector<Constant*>());
1673     delete $1;
1674     CHECK_FOR_ERROR
1675   }
1676   | Types '<' '{' ConstVector '}' '>' {
1677     const StructType *STy = dyn_cast<StructType>($1->get());
1678     if (STy == 0)
1679       GEN_ERROR("Cannot make struct constant with type: '" +
1680                      (*$1)->getDescription() + "'");
1681
1682     if ($4->size() != STy->getNumContainedTypes())
1683       GEN_ERROR("Illegal number of initializers for structure type");
1684
1685     // Check to ensure that constants are compatible with the type initializer!
1686     for (unsigned i = 0, e = $4->size(); i != e; ++i)
1687       if ((*$4)[i]->getType() != STy->getElementType(i))
1688         GEN_ERROR("Expected type '" +
1689                        STy->getElementType(i)->getDescription() +
1690                        "' for element #" + utostr(i) +
1691                        " of structure initializer");
1692
1693     // Check to ensure that Type is packed
1694     if (!STy->isPacked())
1695       GEN_ERROR("Vector initializer to non-vector type '" +
1696                 STy->getDescription() + "'");
1697
1698     $$ = ConstantStruct::get(STy, *$4);
1699     delete $1; delete $4;
1700     CHECK_FOR_ERROR
1701   }
1702   | Types '<' '{' '}' '>' {
1703     if (!UpRefs.empty())
1704       GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
1705     const StructType *STy = dyn_cast<StructType>($1->get());
1706     if (STy == 0)
1707       GEN_ERROR("Cannot make struct constant with type: '" +
1708                      (*$1)->getDescription() + "'");
1709
1710     if (STy->getNumContainedTypes() != 0)
1711       GEN_ERROR("Illegal number of initializers for structure type");
1712
1713     // Check to ensure that Type is packed
1714     if (!STy->isPacked())
1715       GEN_ERROR("Vector initializer to non-vector type '" +
1716                 STy->getDescription() + "'");
1717
1718     $$ = ConstantStruct::get(STy, std::vector<Constant*>());
1719     delete $1;
1720     CHECK_FOR_ERROR
1721   }
1722   | Types NULL_TOK {
1723     if (!UpRefs.empty())
1724       GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
1725     const PointerType *PTy = dyn_cast<PointerType>($1->get());
1726     if (PTy == 0)
1727       GEN_ERROR("Cannot make null pointer constant with type: '" +
1728                      (*$1)->getDescription() + "'");
1729
1730     $$ = ConstantPointerNull::get(PTy);
1731     delete $1;
1732     CHECK_FOR_ERROR
1733   }
1734   | Types UNDEF {
1735     if (!UpRefs.empty())
1736       GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
1737     $$ = UndefValue::get($1->get());
1738     delete $1;
1739     CHECK_FOR_ERROR
1740   }
1741   | Types SymbolicValueRef {
1742     if (!UpRefs.empty())
1743       GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
1744     const PointerType *Ty = dyn_cast<PointerType>($1->get());
1745     if (Ty == 0)
1746       GEN_ERROR("Global const reference must be a pointer type");
1747
1748     // ConstExprs can exist in the body of a function, thus creating
1749     // GlobalValues whenever they refer to a variable.  Because we are in
1750     // the context of a function, getExistingVal will search the functions
1751     // symbol table instead of the module symbol table for the global symbol,
1752     // which throws things all off.  To get around this, we just tell
1753     // getExistingVal that we are at global scope here.
1754     //
1755     Function *SavedCurFn = CurFun.CurrentFunction;
1756     CurFun.CurrentFunction = 0;
1757
1758     Value *V = getExistingVal(Ty, $2);
1759     CHECK_FOR_ERROR
1760
1761     CurFun.CurrentFunction = SavedCurFn;
1762
1763     // If this is an initializer for a constant pointer, which is referencing a
1764     // (currently) undefined variable, create a stub now that shall be replaced
1765     // in the future with the right type of variable.
1766     //
1767     if (V == 0) {
1768       assert(isa<PointerType>(Ty) && "Globals may only be used as pointers!");
1769       const PointerType *PT = cast<PointerType>(Ty);
1770
1771       // First check to see if the forward references value is already created!
1772       PerModuleInfo::GlobalRefsType::iterator I =
1773         CurModule.GlobalRefs.find(std::make_pair(PT, $2));
1774
1775       if (I != CurModule.GlobalRefs.end()) {
1776         V = I->second;             // Placeholder already exists, use it...
1777         $2.destroy();
1778       } else {
1779         std::string Name;
1780         if ($2.Type == ValID::GlobalName)
1781           Name = $2.getName();
1782         else if ($2.Type != ValID::GlobalID)
1783           GEN_ERROR("Invalid reference to global");
1784
1785         // Create the forward referenced global.
1786         GlobalValue *GV;
1787         if (const FunctionType *FTy =
1788                  dyn_cast<FunctionType>(PT->getElementType())) {
1789           GV = new Function(FTy, GlobalValue::ExternalWeakLinkage, Name,
1790                             CurModule.CurrentModule);
1791         } else {
1792           GV = new GlobalVariable(PT->getElementType(), false,
1793                                   GlobalValue::ExternalWeakLinkage, 0,
1794                                   Name, CurModule.CurrentModule);
1795         }
1796
1797         // Keep track of the fact that we have a forward ref to recycle it
1798         CurModule.GlobalRefs.insert(std::make_pair(std::make_pair(PT, $2), GV));
1799         V = GV;
1800       }
1801     }
1802
1803     $$ = cast<GlobalValue>(V);
1804     delete $1;            // Free the type handle
1805     CHECK_FOR_ERROR
1806   }
1807   | Types ConstExpr {
1808     if (!UpRefs.empty())
1809       GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
1810     if ($1->get() != $2->getType())
1811       GEN_ERROR("Mismatched types for constant expression: " +
1812         (*$1)->getDescription() + " and " + $2->getType()->getDescription());
1813     $$ = $2;
1814     delete $1;
1815     CHECK_FOR_ERROR
1816   }
1817   | Types ZEROINITIALIZER {
1818     if (!UpRefs.empty())
1819       GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
1820     const Type *Ty = $1->get();
1821     if (isa<FunctionType>(Ty) || Ty == Type::LabelTy || isa<OpaqueType>(Ty))
1822       GEN_ERROR("Cannot create a null initialized value of this type");
1823     $$ = Constant::getNullValue(Ty);
1824     delete $1;
1825     CHECK_FOR_ERROR
1826   }
1827   | IntType ESINT64VAL {      // integral constants
1828     if (!ConstantInt::isValueValidForType($1, $2))
1829       GEN_ERROR("Constant value doesn't fit in type");
1830     $$ = ConstantInt::get($1, $2, true);
1831     CHECK_FOR_ERROR
1832   }
1833   | IntType ESAPINTVAL {      // arbitrary precision integer constants
1834     uint32_t BitWidth = cast<IntegerType>($1)->getBitWidth();
1835     if ($2->getBitWidth() > BitWidth) {
1836       GEN_ERROR("Constant value does not fit in type");
1837     }
1838     $2->sextOrTrunc(BitWidth);
1839     $$ = ConstantInt::get(*$2);
1840     delete $2;
1841     CHECK_FOR_ERROR
1842   }
1843   | IntType EUINT64VAL {      // integral constants
1844     if (!ConstantInt::isValueValidForType($1, $2))
1845       GEN_ERROR("Constant value doesn't fit in type");
1846     $$ = ConstantInt::get($1, $2, false);
1847     CHECK_FOR_ERROR
1848   }
1849   | IntType EUAPINTVAL {      // arbitrary precision integer constants
1850     uint32_t BitWidth = cast<IntegerType>($1)->getBitWidth();
1851     if ($2->getBitWidth() > BitWidth) {
1852       GEN_ERROR("Constant value does not fit in type");
1853     }
1854     $2->zextOrTrunc(BitWidth);
1855     $$ = ConstantInt::get(*$2);
1856     delete $2;
1857     CHECK_FOR_ERROR
1858   }
1859   | INTTYPE TRUETOK {                      // Boolean constants
1860     assert(cast<IntegerType>($1)->getBitWidth() == 1 && "Not Bool?");
1861     $$ = ConstantInt::getTrue();
1862     CHECK_FOR_ERROR
1863   }
1864   | INTTYPE FALSETOK {                     // Boolean constants
1865     assert(cast<IntegerType>($1)->getBitWidth() == 1 && "Not Bool?");
1866     $$ = ConstantInt::getFalse();
1867     CHECK_FOR_ERROR
1868   }
1869   | FPType FPVAL {                   // Floating point constants
1870     if (!ConstantFP::isValueValidForType($1, *$2))
1871       GEN_ERROR("Floating point constant invalid for type");
1872     // Lexer has no type info, so builds all float and double FP constants
1873     // as double.  Fix this here.  Long double is done right.
1874     if (&$2->getSemantics()==&APFloat::IEEEdouble && $1==Type::FloatTy)
1875       $2->convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven);
1876     $$ = ConstantFP::get($1, *$2);
1877     delete $2;
1878     CHECK_FOR_ERROR
1879   };
1880
1881
1882 ConstExpr: CastOps '(' ConstVal TO Types ')' {
1883     if (!UpRefs.empty())
1884       GEN_ERROR("Invalid upreference in type: " + (*$5)->getDescription());
1885     Constant *Val = $3;
1886     const Type *DestTy = $5->get();
1887     if (!CastInst::castIsValid($1, $3, DestTy))
1888       GEN_ERROR("invalid cast opcode for cast from '" +
1889                 Val->getType()->getDescription() + "' to '" +
1890                 DestTy->getDescription() + "'");
1891     $$ = ConstantExpr::getCast($1, $3, DestTy);
1892     delete $5;
1893   }
1894   | GETELEMENTPTR '(' ConstVal IndexList ')' {
1895     if (!isa<PointerType>($3->getType()))
1896       GEN_ERROR("GetElementPtr requires a pointer operand");
1897
1898     const Type *IdxTy =
1899       GetElementPtrInst::getIndexedType($3->getType(), $4->begin(), $4->end(),
1900                                         true);
1901     if (!IdxTy)
1902       GEN_ERROR("Index list invalid for constant getelementptr");
1903
1904     SmallVector<Constant*, 8> IdxVec;
1905     for (unsigned i = 0, e = $4->size(); i != e; ++i)
1906       if (Constant *C = dyn_cast<Constant>((*$4)[i]))
1907         IdxVec.push_back(C);
1908       else
1909         GEN_ERROR("Indices to constant getelementptr must be constants");
1910
1911     delete $4;
1912
1913     $$ = ConstantExpr::getGetElementPtr($3, &IdxVec[0], IdxVec.size());
1914     CHECK_FOR_ERROR
1915   }
1916   | SELECT '(' ConstVal ',' ConstVal ',' ConstVal ')' {
1917     if ($3->getType() != Type::Int1Ty)
1918       GEN_ERROR("Select condition must be of boolean type");
1919     if ($5->getType() != $7->getType())
1920       GEN_ERROR("Select operand types must match");
1921     $$ = ConstantExpr::getSelect($3, $5, $7);
1922     CHECK_FOR_ERROR
1923   }
1924   | ArithmeticOps '(' ConstVal ',' ConstVal ')' {
1925     if ($3->getType() != $5->getType())
1926       GEN_ERROR("Binary operator types must match");
1927     CHECK_FOR_ERROR;
1928     $$ = ConstantExpr::get($1, $3, $5);
1929   }
1930   | LogicalOps '(' ConstVal ',' ConstVal ')' {
1931     if ($3->getType() != $5->getType())
1932       GEN_ERROR("Logical operator types must match");
1933     if (!$3->getType()->isInteger()) {
1934       if (Instruction::isShift($1) || !isa<VectorType>($3->getType()) ||
1935           !cast<VectorType>($3->getType())->getElementType()->isInteger())
1936         GEN_ERROR("Logical operator requires integral operands");
1937     }
1938     $$ = ConstantExpr::get($1, $3, $5);
1939     CHECK_FOR_ERROR
1940   }
1941   | ICMP IPredicates '(' ConstVal ',' ConstVal ')' {
1942     if ($4->getType() != $6->getType())
1943       GEN_ERROR("icmp operand types must match");
1944     $$ = ConstantExpr::getICmp($2, $4, $6);
1945   }
1946   | FCMP FPredicates '(' ConstVal ',' ConstVal ')' {
1947     if ($4->getType() != $6->getType())
1948       GEN_ERROR("fcmp operand types must match");
1949     $$ = ConstantExpr::getFCmp($2, $4, $6);
1950   }
1951   | EXTRACTELEMENT '(' ConstVal ',' ConstVal ')' {
1952     if (!ExtractElementInst::isValidOperands($3, $5))
1953       GEN_ERROR("Invalid extractelement operands");
1954     $$ = ConstantExpr::getExtractElement($3, $5);
1955     CHECK_FOR_ERROR
1956   }
1957   | INSERTELEMENT '(' ConstVal ',' ConstVal ',' ConstVal ')' {
1958     if (!InsertElementInst::isValidOperands($3, $5, $7))
1959       GEN_ERROR("Invalid insertelement operands");
1960     $$ = ConstantExpr::getInsertElement($3, $5, $7);
1961     CHECK_FOR_ERROR
1962   }
1963   | SHUFFLEVECTOR '(' ConstVal ',' ConstVal ',' ConstVal ')' {
1964     if (!ShuffleVectorInst::isValidOperands($3, $5, $7))
1965       GEN_ERROR("Invalid shufflevector operands");
1966     $$ = ConstantExpr::getShuffleVector($3, $5, $7);
1967     CHECK_FOR_ERROR
1968   };
1969
1970
1971 // ConstVector - A list of comma separated constants.
1972 ConstVector : ConstVector ',' ConstVal {
1973     ($$ = $1)->push_back($3);
1974     CHECK_FOR_ERROR
1975   }
1976   | ConstVal {
1977     $$ = new std::vector<Constant*>();
1978     $$->push_back($1);
1979     CHECK_FOR_ERROR
1980   };
1981
1982
1983 // GlobalType - Match either GLOBAL or CONSTANT for global declarations...
1984 GlobalType : GLOBAL { $$ = false; } | CONSTANT { $$ = true; };
1985
1986 // ThreadLocal
1987 ThreadLocal : THREAD_LOCAL { $$ = true; } | { $$ = false; };
1988
1989 // AliaseeRef - Match either GlobalValue or bitcast to GlobalValue.
1990 AliaseeRef : ResultTypes SymbolicValueRef {
1991     const Type* VTy = $1->get();
1992     Value *V = getVal(VTy, $2);
1993     CHECK_FOR_ERROR
1994     GlobalValue* Aliasee = dyn_cast<GlobalValue>(V);
1995     if (!Aliasee)
1996       GEN_ERROR("Aliases can be created only to global values");
1997
1998     $$ = Aliasee;
1999     CHECK_FOR_ERROR
2000     delete $1;
2001    }
2002    | BITCAST '(' AliaseeRef TO Types ')' {
2003     Constant *Val = $3;
2004     const Type *DestTy = $5->get();
2005     if (!CastInst::castIsValid($1, $3, DestTy))
2006       GEN_ERROR("invalid cast opcode for cast from '" +
2007                 Val->getType()->getDescription() + "' to '" +
2008                 DestTy->getDescription() + "'");
2009
2010     $$ = ConstantExpr::getCast($1, $3, DestTy);
2011     CHECK_FOR_ERROR
2012     delete $5;
2013    };
2014
2015 //===----------------------------------------------------------------------===//
2016 //                             Rules to match Modules
2017 //===----------------------------------------------------------------------===//
2018
2019 // Module rule: Capture the result of parsing the whole file into a result
2020 // variable...
2021 //
2022 Module
2023   : DefinitionList {
2024     $$ = ParserResult = CurModule.CurrentModule;
2025     CurModule.ModuleDone();
2026     CHECK_FOR_ERROR;
2027   }
2028   | /*empty*/ {
2029     $$ = ParserResult = CurModule.CurrentModule;
2030     CurModule.ModuleDone();
2031     CHECK_FOR_ERROR;
2032   }
2033   ;
2034
2035 DefinitionList
2036   : Definition
2037   | DefinitionList Definition
2038   ;
2039
2040 Definition
2041   : DEFINE { CurFun.isDeclare = false; } Function {
2042     CurFun.FunctionDone();
2043     CHECK_FOR_ERROR
2044   }
2045   | DECLARE { CurFun.isDeclare = true; } FunctionProto {
2046     CHECK_FOR_ERROR
2047   }
2048   | MODULE ASM_TOK AsmBlock {
2049     CHECK_FOR_ERROR
2050   }
2051   | OptLocalAssign TYPE Types {
2052     if (!UpRefs.empty())
2053       GEN_ERROR("Invalid upreference in type: " + (*$3)->getDescription());
2054     // Eagerly resolve types.  This is not an optimization, this is a
2055     // requirement that is due to the fact that we could have this:
2056     //
2057     // %list = type { %list * }
2058     // %list = type { %list * }    ; repeated type decl
2059     //
2060     // If types are not resolved eagerly, then the two types will not be
2061     // determined to be the same type!
2062     //
2063     ResolveTypeTo($1, *$3);
2064
2065     if (!setTypeName(*$3, $1) && !$1) {
2066       CHECK_FOR_ERROR
2067       // If this is a named type that is not a redefinition, add it to the slot
2068       // table.
2069       CurModule.Types.push_back(*$3);
2070     }
2071
2072     delete $3;
2073     CHECK_FOR_ERROR
2074   }
2075   | OptLocalAssign TYPE VOID {
2076     ResolveTypeTo($1, $3);
2077
2078     if (!setTypeName($3, $1) && !$1) {
2079       CHECK_FOR_ERROR
2080       // If this is a named type that is not a redefinition, add it to the slot
2081       // table.
2082       CurModule.Types.push_back($3);
2083     }
2084     CHECK_FOR_ERROR
2085   }
2086   | OptGlobalAssign GVVisibilityStyle ThreadLocal GlobalType ConstVal {
2087     /* "Externally Visible" Linkage */
2088     if ($5 == 0)
2089       GEN_ERROR("Global value initializer is not a constant");
2090     CurGV = ParseGlobalVariable($1, GlobalValue::ExternalLinkage,
2091                                 $2, $4, $5->getType(), $5, $3);
2092     CHECK_FOR_ERROR
2093   } GlobalVarAttributes {
2094     CurGV = 0;
2095   }
2096   | OptGlobalAssign GVInternalLinkage GVVisibilityStyle ThreadLocal GlobalType
2097     ConstVal {
2098     if ($6 == 0)
2099       GEN_ERROR("Global value initializer is not a constant");
2100     CurGV = ParseGlobalVariable($1, $2, $3, $5, $6->getType(), $6, $4);
2101     CHECK_FOR_ERROR
2102   } GlobalVarAttributes {
2103     CurGV = 0;
2104   }
2105   | OptGlobalAssign GVExternalLinkage GVVisibilityStyle ThreadLocal GlobalType
2106     Types {
2107     if (!UpRefs.empty())
2108       GEN_ERROR("Invalid upreference in type: " + (*$6)->getDescription());
2109     CurGV = ParseGlobalVariable($1, $2, $3, $5, *$6, 0, $4);
2110     CHECK_FOR_ERROR
2111     delete $6;
2112   } GlobalVarAttributes {
2113     CurGV = 0;
2114     CHECK_FOR_ERROR
2115   }
2116   | OptGlobalAssign GVVisibilityStyle ALIAS AliasLinkage AliaseeRef {
2117     std::string Name;
2118     if ($1) {
2119       Name = *$1;
2120       delete $1;
2121     }
2122     if (Name.empty())
2123       GEN_ERROR("Alias name cannot be empty");
2124
2125     Constant* Aliasee = $5;
2126     if (Aliasee == 0)
2127       GEN_ERROR(std::string("Invalid aliasee for alias: ") + Name);
2128
2129     GlobalAlias* GA = new GlobalAlias(Aliasee->getType(), $4, Name, Aliasee,
2130                                       CurModule.CurrentModule);
2131     GA->setVisibility($2);
2132     InsertValue(GA, CurModule.Values);
2133
2134
2135     // If there was a forward reference of this alias, resolve it now.
2136
2137     ValID ID;
2138     if (!Name.empty())
2139       ID = ValID::createGlobalName(Name);
2140     else
2141       ID = ValID::createGlobalID(CurModule.Values.size()-1);
2142
2143     if (GlobalValue *FWGV =
2144           CurModule.GetForwardRefForGlobal(GA->getType(), ID)) {
2145       // Replace uses of the fwdref with the actual alias.
2146       FWGV->replaceAllUsesWith(GA);
2147       if (GlobalVariable *GV = dyn_cast<GlobalVariable>(FWGV))
2148         GV->eraseFromParent();
2149       else
2150         cast<Function>(FWGV)->eraseFromParent();
2151     }
2152     ID.destroy();
2153
2154     CHECK_FOR_ERROR
2155   }
2156   | TARGET TargetDefinition {
2157     CHECK_FOR_ERROR
2158   }
2159   | DEPLIBS '=' LibrariesDefinition {
2160     CHECK_FOR_ERROR
2161   }
2162   ;
2163
2164
2165 AsmBlock : STRINGCONSTANT {
2166   const std::string &AsmSoFar = CurModule.CurrentModule->getModuleInlineAsm();
2167   if (AsmSoFar.empty())
2168     CurModule.CurrentModule->setModuleInlineAsm(*$1);
2169   else
2170     CurModule.CurrentModule->setModuleInlineAsm(AsmSoFar+"\n"+*$1);
2171   delete $1;
2172   CHECK_FOR_ERROR
2173 };
2174
2175 TargetDefinition : TRIPLE '=' STRINGCONSTANT {
2176     CurModule.CurrentModule->setTargetTriple(*$3);
2177     delete $3;
2178   }
2179   | DATALAYOUT '=' STRINGCONSTANT {
2180     CurModule.CurrentModule->setDataLayout(*$3);
2181     delete $3;
2182   };
2183
2184 LibrariesDefinition : '[' LibList ']';
2185
2186 LibList : LibList ',' STRINGCONSTANT {
2187           CurModule.CurrentModule->addLibrary(*$3);
2188           delete $3;
2189           CHECK_FOR_ERROR
2190         }
2191         | STRINGCONSTANT {
2192           CurModule.CurrentModule->addLibrary(*$1);
2193           delete $1;
2194           CHECK_FOR_ERROR
2195         }
2196         | /* empty: end of list */ {
2197           CHECK_FOR_ERROR
2198         }
2199         ;
2200
2201 //===----------------------------------------------------------------------===//
2202 //                       Rules to match Function Headers
2203 //===----------------------------------------------------------------------===//
2204
2205 ArgListH : ArgListH ',' Types OptParamAttrs OptLocalName {
2206     if (!UpRefs.empty())
2207       GEN_ERROR("Invalid upreference in type: " + (*$3)->getDescription());
2208     if (*$3 == Type::VoidTy)
2209       GEN_ERROR("void typed arguments are invalid");
2210     ArgListEntry E; E.Attrs = $4; E.Ty = $3; E.Name = $5;
2211     $$ = $1;
2212     $1->push_back(E);
2213     CHECK_FOR_ERROR
2214   }
2215   | Types OptParamAttrs OptLocalName {
2216     if (!UpRefs.empty())
2217       GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
2218     if (*$1 == Type::VoidTy)
2219       GEN_ERROR("void typed arguments are invalid");
2220     ArgListEntry E; E.Attrs = $2; E.Ty = $1; E.Name = $3;
2221     $$ = new ArgListType;
2222     $$->push_back(E);
2223     CHECK_FOR_ERROR
2224   };
2225
2226 ArgList : ArgListH {
2227     $$ = $1;
2228     CHECK_FOR_ERROR
2229   }
2230   | ArgListH ',' DOTDOTDOT {
2231     $$ = $1;
2232     struct ArgListEntry E;
2233     E.Ty = new PATypeHolder(Type::VoidTy);
2234     E.Name = 0;
2235     E.Attrs = ParamAttr::None;
2236     $$->push_back(E);
2237     CHECK_FOR_ERROR
2238   }
2239   | DOTDOTDOT {
2240     $$ = new ArgListType;
2241     struct ArgListEntry E;
2242     E.Ty = new PATypeHolder(Type::VoidTy);
2243     E.Name = 0;
2244     E.Attrs = ParamAttr::None;
2245     $$->push_back(E);
2246     CHECK_FOR_ERROR
2247   }
2248   | /* empty */ {
2249     $$ = 0;
2250     CHECK_FOR_ERROR
2251   };
2252
2253 FunctionHeaderH : OptCallingConv ResultTypes GlobalName '(' ArgList ')'
2254                   OptFuncAttrs OptSection OptAlign {
2255   std::string FunctionName(*$3);
2256   delete $3;  // Free strdup'd memory!
2257
2258   // Check the function result for abstractness if this is a define. We should
2259   // have no abstract types at this point
2260   if (!CurFun.isDeclare && CurModule.TypeIsUnresolved($2))
2261     GEN_ERROR("Reference to abstract result: "+ $2->get()->getDescription());
2262
2263   std::vector<const Type*> ParamTypeList;
2264   ParamAttrsVector Attrs;
2265   if ($7 != ParamAttr::None) {
2266     ParamAttrsWithIndex PAWI; PAWI.index = 0; PAWI.attrs = $7;
2267     Attrs.push_back(PAWI);
2268   }
2269   if ($5) {   // If there are arguments...
2270     unsigned index = 1;
2271     for (ArgListType::iterator I = $5->begin(); I != $5->end(); ++I, ++index) {
2272       const Type* Ty = I->Ty->get();
2273       if (!CurFun.isDeclare && CurModule.TypeIsUnresolved(I->Ty))
2274         GEN_ERROR("Reference to abstract argument: " + Ty->getDescription());
2275       ParamTypeList.push_back(Ty);
2276       if (Ty != Type::VoidTy)
2277         if (I->Attrs != ParamAttr::None) {
2278           ParamAttrsWithIndex PAWI; PAWI.index = index; PAWI.attrs = I->Attrs;
2279           Attrs.push_back(PAWI);
2280         }
2281     }
2282   }
2283
2284   bool isVarArg = ParamTypeList.size() && ParamTypeList.back() == Type::VoidTy;
2285   if (isVarArg) ParamTypeList.pop_back();
2286
2287   ParamAttrsList *PAL = 0;
2288   if (!Attrs.empty())
2289     PAL = ParamAttrsList::get(Attrs);
2290
2291   FunctionType *FT = FunctionType::get(*$2, ParamTypeList, isVarArg, PAL);
2292   const PointerType *PFT = PointerType::get(FT);
2293   delete $2;
2294
2295   ValID ID;
2296   if (!FunctionName.empty()) {
2297     ID = ValID::createGlobalName((char*)FunctionName.c_str());
2298   } else {
2299     ID = ValID::createGlobalID(CurModule.Values.size());
2300   }
2301
2302   Function *Fn = 0;
2303   // See if this function was forward referenced.  If so, recycle the object.
2304   if (GlobalValue *FWRef = CurModule.GetForwardRefForGlobal(PFT, ID)) {
2305     // Move the function to the end of the list, from whereever it was
2306     // previously inserted.
2307     Fn = cast<Function>(FWRef);
2308     CurModule.CurrentModule->getFunctionList().remove(Fn);
2309     CurModule.CurrentModule->getFunctionList().push_back(Fn);
2310   } else if (!FunctionName.empty() &&     // Merge with an earlier prototype?
2311              (Fn = CurModule.CurrentModule->getFunction(FunctionName))) {
2312     if (Fn->getFunctionType() != FT) {
2313       // The existing function doesn't have the same type. This is an overload
2314       // error.
2315       GEN_ERROR("Overload of function '" + FunctionName + "' not permitted.");
2316     } else if (!CurFun.isDeclare && !Fn->isDeclaration()) {
2317       // Neither the existing or the current function is a declaration and they
2318       // have the same name and same type. Clearly this is a redefinition.
2319       GEN_ERROR("Redefinition of function '" + FunctionName + "'");
2320     } if (Fn->isDeclaration()) {
2321       // Make sure to strip off any argument names so we can't get conflicts.
2322       for (Function::arg_iterator AI = Fn->arg_begin(), AE = Fn->arg_end();
2323            AI != AE; ++AI)
2324         AI->setName("");
2325     }
2326   } else  {  // Not already defined?
2327     Fn = new Function(FT, GlobalValue::ExternalWeakLinkage, FunctionName,
2328                       CurModule.CurrentModule);
2329
2330     InsertValue(Fn, CurModule.Values);
2331   }
2332
2333   CurFun.FunctionStart(Fn);
2334
2335   if (CurFun.isDeclare) {
2336     // If we have declaration, always overwrite linkage.  This will allow us to
2337     // correctly handle cases, when pointer to function is passed as argument to
2338     // another function.
2339     Fn->setLinkage(CurFun.Linkage);
2340     Fn->setVisibility(CurFun.Visibility);
2341   }
2342   Fn->setCallingConv($1);
2343   Fn->setAlignment($9);
2344   if ($8) {
2345     Fn->setSection(*$8);
2346     delete $8;
2347   }
2348
2349   // Add all of the arguments we parsed to the function...
2350   if ($5) {                     // Is null if empty...
2351     if (isVarArg) {  // Nuke the last entry
2352       assert($5->back().Ty->get() == Type::VoidTy && $5->back().Name == 0 &&
2353              "Not a varargs marker!");
2354       delete $5->back().Ty;
2355       $5->pop_back();  // Delete the last entry
2356     }
2357     Function::arg_iterator ArgIt = Fn->arg_begin();
2358     Function::arg_iterator ArgEnd = Fn->arg_end();
2359     unsigned Idx = 1;
2360     for (ArgListType::iterator I = $5->begin();
2361          I != $5->end() && ArgIt != ArgEnd; ++I, ++ArgIt) {
2362       delete I->Ty;                          // Delete the typeholder...
2363       setValueName(ArgIt, I->Name);       // Insert arg into symtab...
2364       CHECK_FOR_ERROR
2365       InsertValue(ArgIt);
2366       Idx++;
2367     }
2368
2369     delete $5;                     // We're now done with the argument list
2370   }
2371   CHECK_FOR_ERROR
2372 };
2373
2374 BEGIN : BEGINTOK | '{';                // Allow BEGIN or '{' to start a function
2375
2376 FunctionHeader : FunctionDefineLinkage GVVisibilityStyle FunctionHeaderH BEGIN {
2377   $$ = CurFun.CurrentFunction;
2378
2379   // Make sure that we keep track of the linkage type even if there was a
2380   // previous "declare".
2381   $$->setLinkage($1);
2382   $$->setVisibility($2);
2383 };
2384
2385 END : ENDTOK | '}';                    // Allow end of '}' to end a function
2386
2387 Function : BasicBlockList END {
2388   $$ = $1;
2389   CHECK_FOR_ERROR
2390 };
2391
2392 FunctionProto : FunctionDeclareLinkage GVVisibilityStyle FunctionHeaderH {
2393     CurFun.CurrentFunction->setLinkage($1);
2394     CurFun.CurrentFunction->setVisibility($2);
2395     $$ = CurFun.CurrentFunction;
2396     CurFun.FunctionDone();
2397     CHECK_FOR_ERROR
2398   };
2399
2400 //===----------------------------------------------------------------------===//
2401 //                        Rules to match Basic Blocks
2402 //===----------------------------------------------------------------------===//
2403
2404 OptSideEffect : /* empty */ {
2405     $$ = false;
2406     CHECK_FOR_ERROR
2407   }
2408   | SIDEEFFECT {
2409     $$ = true;
2410     CHECK_FOR_ERROR
2411   };
2412
2413 ConstValueRef : ESINT64VAL {    // A reference to a direct constant
2414     $$ = ValID::create($1);
2415     CHECK_FOR_ERROR
2416   }
2417   | EUINT64VAL {
2418     $$ = ValID::create($1);
2419     CHECK_FOR_ERROR
2420   }
2421   | FPVAL {                     // Perhaps it's an FP constant?
2422     $$ = ValID::create($1);
2423     CHECK_FOR_ERROR
2424   }
2425   | TRUETOK {
2426     $$ = ValID::create(ConstantInt::getTrue());
2427     CHECK_FOR_ERROR
2428   }
2429   | FALSETOK {
2430     $$ = ValID::create(ConstantInt::getFalse());
2431     CHECK_FOR_ERROR
2432   }
2433   | NULL_TOK {
2434     $$ = ValID::createNull();
2435     CHECK_FOR_ERROR
2436   }
2437   | UNDEF {
2438     $$ = ValID::createUndef();
2439     CHECK_FOR_ERROR
2440   }
2441   | ZEROINITIALIZER {     // A vector zero constant.
2442     $$ = ValID::createZeroInit();
2443     CHECK_FOR_ERROR
2444   }
2445   | '<' ConstVector '>' { // Nonempty unsized packed vector
2446     const Type *ETy = (*$2)[0]->getType();
2447     int NumElements = $2->size();
2448
2449     VectorType* pt = VectorType::get(ETy, NumElements);
2450     PATypeHolder* PTy = new PATypeHolder(
2451                                          HandleUpRefs(
2452                                             VectorType::get(
2453                                                 ETy,
2454                                                 NumElements)
2455                                             )
2456                                          );
2457
2458     // Verify all elements are correct type!
2459     for (unsigned i = 0; i < $2->size(); i++) {
2460       if (ETy != (*$2)[i]->getType())
2461         GEN_ERROR("Element #" + utostr(i) + " is not of type '" +
2462                      ETy->getDescription() +"' as required!\nIt is of type '" +
2463                      (*$2)[i]->getType()->getDescription() + "'.");
2464     }
2465
2466     $$ = ValID::create(ConstantVector::get(pt, *$2));
2467     delete PTy; delete $2;
2468     CHECK_FOR_ERROR
2469   }
2470   | ConstExpr {
2471     $$ = ValID::create($1);
2472     CHECK_FOR_ERROR
2473   }
2474   | ASM_TOK OptSideEffect STRINGCONSTANT ',' STRINGCONSTANT {
2475     $$ = ValID::createInlineAsm(*$3, *$5, $2);
2476     delete $3;
2477     delete $5;
2478     CHECK_FOR_ERROR
2479   };
2480
2481 // SymbolicValueRef - Reference to one of two ways of symbolically refering to
2482 // another value.
2483 //
2484 SymbolicValueRef : LOCALVAL_ID {  // Is it an integer reference...?
2485     $$ = ValID::createLocalID($1);
2486     CHECK_FOR_ERROR
2487   }
2488   | GLOBALVAL_ID {
2489     $$ = ValID::createGlobalID($1);
2490     CHECK_FOR_ERROR
2491   }
2492   | LocalName {                   // Is it a named reference...?
2493     $$ = ValID::createLocalName(*$1);
2494     delete $1;
2495     CHECK_FOR_ERROR
2496   }
2497   | GlobalName {                   // Is it a named reference...?
2498     $$ = ValID::createGlobalName(*$1);
2499     delete $1;
2500     CHECK_FOR_ERROR
2501   };
2502
2503 // ValueRef - A reference to a definition... either constant or symbolic
2504 ValueRef : SymbolicValueRef | ConstValueRef;
2505
2506
2507 // ResolvedVal - a <type> <value> pair.  This is used only in cases where the
2508 // type immediately preceeds the value reference, and allows complex constant
2509 // pool references (for things like: 'ret [2 x int] [ int 12, int 42]')
2510 ResolvedVal : Types ValueRef {
2511     if (!UpRefs.empty())
2512       GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
2513     $$ = getVal(*$1, $2);
2514     delete $1;
2515     CHECK_FOR_ERROR
2516   }
2517   ;
2518
2519 BasicBlockList : BasicBlockList BasicBlock {
2520     $$ = $1;
2521     CHECK_FOR_ERROR
2522   }
2523   | FunctionHeader BasicBlock { // Do not allow functions with 0 basic blocks
2524     $$ = $1;
2525     CHECK_FOR_ERROR
2526   };
2527
2528
2529 // Basic blocks are terminated by branching instructions:
2530 // br, br/cc, switch, ret
2531 //
2532 BasicBlock : InstructionList OptLocalAssign BBTerminatorInst  {
2533     setValueName($3, $2);
2534     CHECK_FOR_ERROR
2535     InsertValue($3);
2536     $1->getInstList().push_back($3);
2537     $$ = $1;
2538     CHECK_FOR_ERROR
2539   };
2540
2541 InstructionList : InstructionList Inst {
2542     if (CastInst *CI1 = dyn_cast<CastInst>($2))
2543       if (CastInst *CI2 = dyn_cast<CastInst>(CI1->getOperand(0)))
2544         if (CI2->getParent() == 0)
2545           $1->getInstList().push_back(CI2);
2546     $1->getInstList().push_back($2);
2547     $$ = $1;
2548     CHECK_FOR_ERROR
2549   }
2550   | /* empty */ {          // Empty space between instruction lists
2551     $$ = defineBBVal(ValID::createLocalID(CurFun.NextValNum));
2552     CHECK_FOR_ERROR
2553   }
2554   | LABELSTR {             // Labelled (named) basic block
2555     $$ = defineBBVal(ValID::createLocalName(*$1));
2556     delete $1;
2557     CHECK_FOR_ERROR
2558
2559   };
2560
2561 BBTerminatorInst : RET ResolvedVal {              // Return with a result...
2562     $$ = new ReturnInst($2);
2563     CHECK_FOR_ERROR
2564   }
2565   | RET VOID {                                    // Return with no result...
2566     $$ = new ReturnInst();
2567     CHECK_FOR_ERROR
2568   }
2569   | BR LABEL ValueRef {                           // Unconditional Branch...
2570     BasicBlock* tmpBB = getBBVal($3);
2571     CHECK_FOR_ERROR
2572     $$ = new BranchInst(tmpBB);
2573   }                                               // Conditional Branch...
2574   | BR INTTYPE ValueRef ',' LABEL ValueRef ',' LABEL ValueRef {
2575     assert(cast<IntegerType>($2)->getBitWidth() == 1 && "Not Bool?");
2576     BasicBlock* tmpBBA = getBBVal($6);
2577     CHECK_FOR_ERROR
2578     BasicBlock* tmpBBB = getBBVal($9);
2579     CHECK_FOR_ERROR
2580     Value* tmpVal = getVal(Type::Int1Ty, $3);
2581     CHECK_FOR_ERROR
2582     $$ = new BranchInst(tmpBBA, tmpBBB, tmpVal);
2583   }
2584   | SWITCH IntType ValueRef ',' LABEL ValueRef '[' JumpTable ']' {
2585     Value* tmpVal = getVal($2, $3);
2586     CHECK_FOR_ERROR
2587     BasicBlock* tmpBB = getBBVal($6);
2588     CHECK_FOR_ERROR
2589     SwitchInst *S = new SwitchInst(tmpVal, tmpBB, $8->size());
2590     $$ = S;
2591
2592     std::vector<std::pair<Constant*,BasicBlock*> >::iterator I = $8->begin(),
2593       E = $8->end();
2594     for (; I != E; ++I) {
2595       if (ConstantInt *CI = dyn_cast<ConstantInt>(I->first))
2596           S->addCase(CI, I->second);
2597       else
2598         GEN_ERROR("Switch case is constant, but not a simple integer");
2599     }
2600     delete $8;
2601     CHECK_FOR_ERROR
2602   }
2603   | SWITCH IntType ValueRef ',' LABEL ValueRef '[' ']' {
2604     Value* tmpVal = getVal($2, $3);
2605     CHECK_FOR_ERROR
2606     BasicBlock* tmpBB = getBBVal($6);
2607     CHECK_FOR_ERROR
2608     SwitchInst *S = new SwitchInst(tmpVal, tmpBB, 0);
2609     $$ = S;
2610     CHECK_FOR_ERROR
2611   }
2612   | INVOKE OptCallingConv ResultTypes ValueRef '(' ValueRefList ')' OptFuncAttrs
2613     TO LABEL ValueRef UNWIND LABEL ValueRef {
2614
2615     // Handle the short syntax
2616     const PointerType *PFTy = 0;
2617     const FunctionType *Ty = 0;
2618     if (!(PFTy = dyn_cast<PointerType>($3->get())) ||
2619         !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) {
2620       // Pull out the types of all of the arguments...
2621       std::vector<const Type*> ParamTypes;
2622       ParamAttrsVector Attrs;
2623       if ($8 != ParamAttr::None) {
2624         ParamAttrsWithIndex PAWI; PAWI.index = 0; PAWI.attrs = $8;
2625         Attrs.push_back(PAWI);
2626       }
2627       ValueRefList::iterator I = $6->begin(), E = $6->end();
2628       unsigned index = 1;
2629       for (; I != E; ++I, ++index) {
2630         const Type *Ty = I->Val->getType();
2631         if (Ty == Type::VoidTy)
2632           GEN_ERROR("Short call syntax cannot be used with varargs");
2633         ParamTypes.push_back(Ty);
2634         if (I->Attrs != ParamAttr::None) {
2635           ParamAttrsWithIndex PAWI; PAWI.index = index; PAWI.attrs = I->Attrs;
2636           Attrs.push_back(PAWI);
2637         }
2638       }
2639
2640       ParamAttrsList *PAL = 0;
2641       if (!Attrs.empty())
2642         PAL = ParamAttrsList::get(Attrs);
2643       Ty = FunctionType::get($3->get(), ParamTypes, false, PAL);
2644       PFTy = PointerType::get(Ty);
2645     }
2646
2647     delete $3;
2648
2649     Value *V = getVal(PFTy, $4);   // Get the function we're calling...
2650     CHECK_FOR_ERROR
2651     BasicBlock *Normal = getBBVal($11);
2652     CHECK_FOR_ERROR
2653     BasicBlock *Except = getBBVal($14);
2654     CHECK_FOR_ERROR
2655
2656     // Check the arguments
2657     ValueList Args;
2658     if ($6->empty()) {                                   // Has no arguments?
2659       // Make sure no arguments is a good thing!
2660       if (Ty->getNumParams() != 0)
2661         GEN_ERROR("No arguments passed to a function that "
2662                        "expects arguments");
2663     } else {                                     // Has arguments?
2664       // Loop through FunctionType's arguments and ensure they are specified
2665       // correctly!
2666       FunctionType::param_iterator I = Ty->param_begin();
2667       FunctionType::param_iterator E = Ty->param_end();
2668       ValueRefList::iterator ArgI = $6->begin(), ArgE = $6->end();
2669
2670       for (; ArgI != ArgE && I != E; ++ArgI, ++I) {
2671         if (ArgI->Val->getType() != *I)
2672           GEN_ERROR("Parameter " + ArgI->Val->getName()+ " is not of type '" +
2673                          (*I)->getDescription() + "'");
2674         Args.push_back(ArgI->Val);
2675       }
2676
2677       if (Ty->isVarArg()) {
2678         if (I == E)
2679           for (; ArgI != ArgE; ++ArgI)
2680             Args.push_back(ArgI->Val); // push the remaining varargs
2681       } else if (I != E || ArgI != ArgE)
2682         GEN_ERROR("Invalid number of parameters detected");
2683     }
2684
2685     // Create the InvokeInst
2686     InvokeInst *II = new InvokeInst(V, Normal, Except, Args.begin(), Args.end());
2687     II->setCallingConv($2);
2688     $$ = II;
2689     delete $6;
2690     CHECK_FOR_ERROR
2691   }
2692   | UNWIND {
2693     $$ = new UnwindInst();
2694     CHECK_FOR_ERROR
2695   }
2696   | UNREACHABLE {
2697     $$ = new UnreachableInst();
2698     CHECK_FOR_ERROR
2699   };
2700
2701
2702
2703 JumpTable : JumpTable IntType ConstValueRef ',' LABEL ValueRef {
2704     $$ = $1;
2705     Constant *V = cast<Constant>(getExistingVal($2, $3));
2706     CHECK_FOR_ERROR
2707     if (V == 0)
2708       GEN_ERROR("May only switch on a constant pool value");
2709
2710     BasicBlock* tmpBB = getBBVal($6);
2711     CHECK_FOR_ERROR
2712     $$->push_back(std::make_pair(V, tmpBB));
2713   }
2714   | IntType ConstValueRef ',' LABEL ValueRef {
2715     $$ = new std::vector<std::pair<Constant*, BasicBlock*> >();
2716     Constant *V = cast<Constant>(getExistingVal($1, $2));
2717     CHECK_FOR_ERROR
2718
2719     if (V == 0)
2720       GEN_ERROR("May only switch on a constant pool value");
2721
2722     BasicBlock* tmpBB = getBBVal($5);
2723     CHECK_FOR_ERROR
2724     $$->push_back(std::make_pair(V, tmpBB));
2725   };
2726
2727 Inst : OptLocalAssign InstVal {
2728     // Is this definition named?? if so, assign the name...
2729     setValueName($2, $1);
2730     CHECK_FOR_ERROR
2731     InsertValue($2);
2732     $$ = $2;
2733     CHECK_FOR_ERROR
2734   };
2735
2736
2737 PHIList : Types '[' ValueRef ',' ValueRef ']' {    // Used for PHI nodes
2738     if (!UpRefs.empty())
2739       GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
2740     $$ = new std::list<std::pair<Value*, BasicBlock*> >();
2741     Value* tmpVal = getVal(*$1, $3);
2742     CHECK_FOR_ERROR
2743     BasicBlock* tmpBB = getBBVal($5);
2744     CHECK_FOR_ERROR
2745     $$->push_back(std::make_pair(tmpVal, tmpBB));
2746     delete $1;
2747   }
2748   | PHIList ',' '[' ValueRef ',' ValueRef ']' {
2749     $$ = $1;
2750     Value* tmpVal = getVal($1->front().first->getType(), $4);
2751     CHECK_FOR_ERROR
2752     BasicBlock* tmpBB = getBBVal($6);
2753     CHECK_FOR_ERROR
2754     $1->push_back(std::make_pair(tmpVal, tmpBB));
2755   };
2756
2757
2758 ValueRefList : Types ValueRef OptParamAttrs {
2759     if (!UpRefs.empty())
2760       GEN_ERROR("Invalid upreference in type: " + (*$1)->getDescription());
2761     // Used for call and invoke instructions
2762     $$ = new ValueRefList();
2763     ValueRefListEntry E; E.Attrs = $3; E.Val = getVal($1->get(), $2);
2764     $$->push_back(E);
2765     delete $1;
2766   }
2767   | ValueRefList ',' Types ValueRef OptParamAttrs {
2768     if (!UpRefs.empty())
2769       GEN_ERROR("Invalid upreference in type: " + (*$3)->getDescription());
2770     $$ = $1;
2771     ValueRefListEntry E; E.Attrs = $5; E.Val = getVal($3->get(), $4);
2772     $$->push_back(E);
2773     delete $3;
2774     CHECK_FOR_ERROR
2775   }
2776   | /*empty*/ { $$ = new ValueRefList(); };
2777
2778 IndexList       // Used for gep instructions and constant expressions
2779   : /*empty*/ { $$ = new std::vector<Value*>(); }
2780   | IndexList ',' ResolvedVal {
2781     $$ = $1;
2782     $$->push_back($3);
2783     CHECK_FOR_ERROR
2784   }
2785   ;
2786
2787 OptTailCall : TAIL CALL {
2788     $$ = true;
2789     CHECK_FOR_ERROR
2790   }
2791   | CALL {
2792     $$ = false;
2793     CHECK_FOR_ERROR
2794   };
2795
2796 InstVal : ArithmeticOps Types ValueRef ',' ValueRef {
2797     if (!UpRefs.empty())
2798       GEN_ERROR("Invalid upreference in type: " + (*$2)->getDescription());
2799     if (!(*$2)->isInteger() && !(*$2)->isFloatingPoint() &&
2800         !isa<VectorType>((*$2).get()))
2801       GEN_ERROR(
2802         "Arithmetic operator requires integer, FP, or packed operands");
2803     if (isa<VectorType>((*$2).get()) &&
2804         ($1 == Instruction::URem ||
2805          $1 == Instruction::SRem ||
2806          $1 == Instruction::FRem))
2807       GEN_ERROR("Remainder not supported on vector types");
2808     Value* val1 = getVal(*$2, $3);
2809     CHECK_FOR_ERROR
2810     Value* val2 = getVal(*$2, $5);
2811     CHECK_FOR_ERROR
2812     $$ = BinaryOperator::create($1, val1, val2);
2813     if ($$ == 0)
2814       GEN_ERROR("binary operator returned null");
2815     delete $2;
2816   }
2817   | LogicalOps Types ValueRef ',' ValueRef {
2818     if (!UpRefs.empty())
2819       GEN_ERROR("Invalid upreference in type: " + (*$2)->getDescription());
2820     if (!(*$2)->isInteger()) {
2821       if (Instruction::isShift($1) || !isa<VectorType>($2->get()) ||
2822           !cast<VectorType>($2->get())->getElementType()->isInteger())
2823         GEN_ERROR("Logical operator requires integral operands");
2824     }
2825     Value* tmpVal1 = getVal(*$2, $3);
2826     CHECK_FOR_ERROR
2827     Value* tmpVal2 = getVal(*$2, $5);
2828     CHECK_FOR_ERROR
2829     $$ = BinaryOperator::create($1, tmpVal1, tmpVal2);
2830     if ($$ == 0)
2831       GEN_ERROR("binary operator returned null");
2832     delete $2;
2833   }
2834   | ICMP IPredicates Types ValueRef ',' ValueRef  {
2835     if (!UpRefs.empty())
2836       GEN_ERROR("Invalid upreference in type: " + (*$3)->getDescription());
2837     if (isa<VectorType>((*$3).get()))
2838       GEN_ERROR("Vector types not supported by icmp instruction");
2839     Value* tmpVal1 = getVal(*$3, $4);
2840     CHECK_FOR_ERROR
2841     Value* tmpVal2 = getVal(*$3, $6);
2842     CHECK_FOR_ERROR
2843     $$ = CmpInst::create($1, $2, tmpVal1, tmpVal2);
2844     if ($$ == 0)
2845       GEN_ERROR("icmp operator returned null");
2846     delete $3;
2847   }
2848   | FCMP FPredicates Types ValueRef ',' ValueRef  {
2849     if (!UpRefs.empty())
2850       GEN_ERROR("Invalid upreference in type: " + (*$3)->getDescription());
2851     if (isa<VectorType>((*$3).get()))
2852       GEN_ERROR("Vector types not supported by fcmp instruction");
2853     Value* tmpVal1 = getVal(*$3, $4);
2854     CHECK_FOR_ERROR
2855     Value* tmpVal2 = getVal(*$3, $6);
2856     CHECK_FOR_ERROR
2857     $$ = CmpInst::create($1, $2, tmpVal1, tmpVal2);
2858     if ($$ == 0)
2859       GEN_ERROR("fcmp operator returned null");
2860     delete $3;
2861   }
2862   | CastOps ResolvedVal TO Types {
2863     if (!UpRefs.empty())
2864       GEN_ERROR("Invalid upreference in type: " + (*$4)->getDescription());
2865     Value* Val = $2;
2866     const Type* DestTy = $4->get();
2867     if (!CastInst::castIsValid($1, Val, DestTy))
2868       GEN_ERROR("invalid cast opcode for cast from '" +
2869                 Val->getType()->getDescription() + "' to '" +
2870                 DestTy->getDescription() + "'");
2871     $$ = CastInst::create($1, Val, DestTy);
2872     delete $4;
2873   }
2874   | SELECT ResolvedVal ',' ResolvedVal ',' ResolvedVal {
2875     if ($2->getType() != Type::Int1Ty)
2876       GEN_ERROR("select condition must be boolean");
2877     if ($4->getType() != $6->getType())
2878       GEN_ERROR("select value types should match");
2879     $$ = new SelectInst($2, $4, $6);
2880     CHECK_FOR_ERROR
2881   }
2882   | VAARG ResolvedVal ',' Types {
2883     if (!UpRefs.empty())
2884       GEN_ERROR("Invalid upreference in type: " + (*$4)->getDescription());
2885     $$ = new VAArgInst($2, *$4);
2886     delete $4;
2887     CHECK_FOR_ERROR
2888   }
2889   | EXTRACTELEMENT ResolvedVal ',' ResolvedVal {
2890     if (!ExtractElementInst::isValidOperands($2, $4))
2891       GEN_ERROR("Invalid extractelement operands");
2892     $$ = new ExtractElementInst($2, $4);
2893     CHECK_FOR_ERROR
2894   }
2895   | INSERTELEMENT ResolvedVal ',' ResolvedVal ',' ResolvedVal {
2896     if (!InsertElementInst::isValidOperands($2, $4, $6))
2897       GEN_ERROR("Invalid insertelement operands");
2898     $$ = new InsertElementInst($2, $4, $6);
2899     CHECK_FOR_ERROR
2900   }
2901   | SHUFFLEVECTOR ResolvedVal ',' ResolvedVal ',' ResolvedVal {
2902     if (!ShuffleVectorInst::isValidOperands($2, $4, $6))
2903       GEN_ERROR("Invalid shufflevector operands");
2904     $$ = new ShuffleVectorInst($2, $4, $6);
2905     CHECK_FOR_ERROR
2906   }
2907   | PHI_TOK PHIList {
2908     const Type *Ty = $2->front().first->getType();
2909     if (!Ty->isFirstClassType())
2910       GEN_ERROR("PHI node operands must be of first class type");
2911     $$ = new PHINode(Ty);
2912     ((PHINode*)$$)->reserveOperandSpace($2->size());
2913     while ($2->begin() != $2->end()) {
2914       if ($2->front().first->getType() != Ty)
2915         GEN_ERROR("All elements of a PHI node must be of the same type");
2916       cast<PHINode>($$)->addIncoming($2->front().first, $2->front().second);
2917       $2->pop_front();
2918     }
2919     delete $2;  // Free the list...
2920     CHECK_FOR_ERROR
2921   }
2922   | OptTailCall OptCallingConv ResultTypes ValueRef '(' ValueRefList ')'
2923     OptFuncAttrs {
2924
2925     // Handle the short syntax
2926     const PointerType *PFTy = 0;
2927     const FunctionType *Ty = 0;
2928     if (!(PFTy = dyn_cast<PointerType>($3->get())) ||
2929         !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) {
2930       // Pull out the types of all of the arguments...
2931       std::vector<const Type*> ParamTypes;
2932       ParamAttrsVector Attrs;
2933       if ($8 != ParamAttr::None) {
2934         ParamAttrsWithIndex PAWI; PAWI.index = 0; PAWI.attrs = $8;
2935         Attrs.push_back(PAWI);
2936       }
2937       unsigned index = 1;
2938       ValueRefList::iterator I = $6->begin(), E = $6->end();
2939       for (; I != E; ++I, ++index) {
2940         const Type *Ty = I->Val->getType();
2941         if (Ty == Type::VoidTy)
2942           GEN_ERROR("Short call syntax cannot be used with varargs");
2943         ParamTypes.push_back(Ty);
2944         if (I->Attrs != ParamAttr::None) {
2945           ParamAttrsWithIndex PAWI; PAWI.index = index; PAWI.attrs = I->Attrs;
2946           Attrs.push_back(PAWI);
2947         }
2948       }
2949
2950       ParamAttrsList *PAL = 0;
2951       if (!Attrs.empty())
2952         PAL = ParamAttrsList::get(Attrs);
2953
2954       Ty = FunctionType::get($3->get(), ParamTypes, false, PAL);
2955       PFTy = PointerType::get(Ty);
2956     }
2957
2958     Value *V = getVal(PFTy, $4);   // Get the function we're calling...
2959     CHECK_FOR_ERROR
2960
2961     // Check for call to invalid intrinsic to avoid crashing later.
2962     if (Function *theF = dyn_cast<Function>(V)) {
2963       if (theF->hasName() && (theF->getValueName()->getKeyLength() >= 5) &&
2964           (0 == strncmp(theF->getValueName()->getKeyData(), "llvm.", 5)) &&
2965           !theF->getIntrinsicID(true))
2966         GEN_ERROR("Call to invalid LLVM intrinsic function '" +
2967                   theF->getName() + "'");
2968     }
2969
2970     // Check the arguments
2971     ValueList Args;
2972     if ($6->empty()) {                                   // Has no arguments?
2973       // Make sure no arguments is a good thing!
2974       if (Ty->getNumParams() != 0)
2975         GEN_ERROR("No arguments passed to a function that "
2976                        "expects arguments");
2977     } else {                                     // Has arguments?
2978       // Loop through FunctionType's arguments and ensure they are specified
2979       // correctly!
2980       //
2981       FunctionType::param_iterator I = Ty->param_begin();
2982       FunctionType::param_iterator E = Ty->param_end();
2983       ValueRefList::iterator ArgI = $6->begin(), ArgE = $6->end();
2984
2985       for (; ArgI != ArgE && I != E; ++ArgI, ++I) {
2986         if (ArgI->Val->getType() != *I)
2987           GEN_ERROR("Parameter " + ArgI->Val->getName()+ " is not of type '" +
2988                          (*I)->getDescription() + "'");
2989         Args.push_back(ArgI->Val);
2990       }
2991       if (Ty->isVarArg()) {
2992         if (I == E)
2993           for (; ArgI != ArgE; ++ArgI)
2994             Args.push_back(ArgI->Val); // push the remaining varargs
2995       } else if (I != E || ArgI != ArgE)
2996         GEN_ERROR("Invalid number of parameters detected");
2997     }
2998     // Create the call node
2999     CallInst *CI = new CallInst(V, Args.begin(), Args.end());
3000     CI->setTailCall($1);
3001     CI->setCallingConv($2);
3002     $$ = CI;
3003     delete $6;
3004     delete $3;
3005     CHECK_FOR_ERROR
3006   }
3007   | MemoryInst {
3008     $$ = $1;
3009     CHECK_FOR_ERROR
3010   };
3011
3012 OptVolatile : VOLATILE {
3013     $$ = true;
3014     CHECK_FOR_ERROR
3015   }
3016   | /* empty */ {
3017     $$ = false;
3018     CHECK_FOR_ERROR
3019   };
3020
3021
3022
3023 MemoryInst : MALLOC Types OptCAlign {
3024     if (!UpRefs.empty())
3025       GEN_ERROR("Invalid upreference in type: " + (*$2)->getDescription());
3026     $$ = new MallocInst(*$2, 0, $3);
3027     delete $2;
3028     CHECK_FOR_ERROR
3029   }
3030   | MALLOC Types ',' INTTYPE ValueRef OptCAlign {
3031     if (!UpRefs.empty())
3032       GEN_ERROR("Invalid upreference in type: " + (*$2)->getDescription());
3033     Value* tmpVal = getVal($4, $5);
3034     CHECK_FOR_ERROR
3035     $$ = new MallocInst(*$2, tmpVal, $6);
3036     delete $2;
3037   }
3038   | ALLOCA Types OptCAlign {
3039     if (!UpRefs.empty())
3040       GEN_ERROR("Invalid upreference in type: " + (*$2)->getDescription());
3041     $$ = new AllocaInst(*$2, 0, $3);
3042     delete $2;
3043     CHECK_FOR_ERROR
3044   }
3045   | ALLOCA Types ',' INTTYPE ValueRef OptCAlign {
3046     if (!UpRefs.empty())
3047       GEN_ERROR("Invalid upreference in type: " + (*$2)->getDescription());
3048     Value* tmpVal = getVal($4, $5);
3049     CHECK_FOR_ERROR
3050     $$ = new AllocaInst(*$2, tmpVal, $6);
3051     delete $2;
3052   }
3053   | FREE ResolvedVal {
3054     if (!isa<PointerType>($2->getType()))
3055       GEN_ERROR("Trying to free nonpointer type " +
3056                      $2->getType()->getDescription() + "");
3057     $$ = new FreeInst($2);
3058     CHECK_FOR_ERROR
3059   }
3060
3061   | OptVolatile LOAD Types ValueRef OptCAlign {
3062     if (!UpRefs.empty())
3063       GEN_ERROR("Invalid upreference in type: " + (*$3)->getDescription());
3064     if (!isa<PointerType>($3->get()))
3065       GEN_ERROR("Can't load from nonpointer type: " +
3066                      (*$3)->getDescription());
3067     if (!cast<PointerType>($3->get())->getElementType()->isFirstClassType())
3068       GEN_ERROR("Can't load from pointer of non-first-class type: " +
3069                      (*$3)->getDescription());
3070     Value* tmpVal = getVal(*$3, $4);
3071     CHECK_FOR_ERROR
3072     $$ = new LoadInst(tmpVal, "", $1, $5);
3073     delete $3;
3074   }
3075   | OptVolatile STORE ResolvedVal ',' Types ValueRef OptCAlign {
3076     if (!UpRefs.empty())
3077       GEN_ERROR("Invalid upreference in type: " + (*$5)->getDescription());
3078     const PointerType *PT = dyn_cast<PointerType>($5->get());
3079     if (!PT)
3080       GEN_ERROR("Can't store to a nonpointer type: " +
3081                      (*$5)->getDescription());
3082     const Type *ElTy = PT->getElementType();
3083     if (ElTy != $3->getType())
3084       GEN_ERROR("Can't store '" + $3->getType()->getDescription() +
3085                      "' into space of type '" + ElTy->getDescription() + "'");
3086
3087     Value* tmpVal = getVal(*$5, $6);
3088     CHECK_FOR_ERROR
3089     $$ = new StoreInst($3, tmpVal, $1, $7);
3090     delete $5;
3091   }
3092   | GETELEMENTPTR Types ValueRef IndexList {
3093     if (!UpRefs.empty())
3094       GEN_ERROR("Invalid upreference in type: " + (*$2)->getDescription());
3095     if (!isa<PointerType>($2->get()))
3096       GEN_ERROR("getelementptr insn requires pointer operand");
3097
3098     if (!GetElementPtrInst::getIndexedType(*$2, $4->begin(), $4->end(), true))
3099       GEN_ERROR("Invalid getelementptr indices for type '" +
3100                      (*$2)->getDescription()+ "'");
3101     Value* tmpVal = getVal(*$2, $3);
3102     CHECK_FOR_ERROR
3103     $$ = new GetElementPtrInst(tmpVal, $4->begin(), $4->end());
3104     delete $2;
3105     delete $4;
3106   };
3107
3108
3109 %%
3110
3111 // common code from the two 'RunVMAsmParser' functions
3112 static Module* RunParser(Module * M) {
3113
3114   llvmAsmlineno = 1;      // Reset the current line number...
3115   CurModule.CurrentModule = M;
3116 #if YYDEBUG
3117   yydebug = Debug;
3118 #endif
3119
3120   // Check to make sure the parser succeeded
3121   if (yyparse()) {
3122     if (ParserResult)
3123       delete ParserResult;
3124     return 0;
3125   }
3126
3127   // Emit an error if there are any unresolved types left.
3128   if (!CurModule.LateResolveTypes.empty()) {
3129     const ValID &DID = CurModule.LateResolveTypes.begin()->first;
3130     if (DID.Type == ValID::LocalName) {
3131       GenerateError("Undefined type remains at eof: '"+DID.getName() + "'");
3132     } else {
3133       GenerateError("Undefined type remains at eof: #" + itostr(DID.Num));
3134     }
3135     if (ParserResult)
3136       delete ParserResult;
3137     return 0;
3138   }
3139
3140   // Emit an error if there are any unresolved values left.
3141   if (!CurModule.LateResolveValues.empty()) {
3142     Value *V = CurModule.LateResolveValues.back();
3143     std::map<Value*, std::pair<ValID, int> >::iterator I =
3144       CurModule.PlaceHolderInfo.find(V);
3145
3146     if (I != CurModule.PlaceHolderInfo.end()) {
3147       ValID &DID = I->second.first;
3148       if (DID.Type == ValID::LocalName) {
3149         GenerateError("Undefined value remains at eof: "+DID.getName() + "'");
3150       } else {
3151         GenerateError("Undefined value remains at eof: #" + itostr(DID.Num));
3152       }
3153       if (ParserResult)
3154         delete ParserResult;
3155       return 0;
3156     }
3157   }
3158
3159   // Check to make sure that parsing produced a result
3160   if (!ParserResult)
3161     return 0;
3162
3163   // Reset ParserResult variable while saving its value for the result.
3164   Module *Result = ParserResult;
3165   ParserResult = 0;
3166
3167   return Result;
3168 }
3169
3170 void llvm::GenerateError(const std::string &message, int LineNo) {
3171   if (LineNo == -1) LineNo = llvmAsmlineno;
3172   // TODO: column number in exception
3173   if (TheParseError)
3174     TheParseError->setError(CurFilename, message, LineNo);
3175   TriggerError = 1;
3176 }
3177
3178 int yyerror(const char *ErrorMsg) {
3179   std::string where
3180     = std::string((CurFilename == "-") ? std::string("<stdin>") : CurFilename)
3181                   + ":" + utostr((unsigned) llvmAsmlineno) + ": ";
3182   std::string errMsg = where + "error: " + std::string(ErrorMsg);
3183   if (yychar != YYEMPTY && yychar != 0)
3184     errMsg += " while reading token: '" + std::string(llvmAsmtext, llvmAsmleng)+
3185               "'";
3186   GenerateError(errMsg);
3187   return 0;
3188 }