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