1 //===-- llvmAsmParser.y - Parser for llvm assembly files --------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
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.
8 //===----------------------------------------------------------------------===//
10 // This file implements the bison parser for LLVM assembly languages files.
12 //===----------------------------------------------------------------------===//
15 #include "ParserInternals.h"
16 #include "llvm/SymbolTable.h"
17 #include "llvm/Module.h"
18 #include "llvm/iTerminators.h"
19 #include "llvm/iMemory.h"
20 #include "llvm/iOperators.h"
21 #include "llvm/iPHINode.h"
22 #include "Support/STLExtras.h"
23 #include "Support/DepthFirstIterator.h"
28 int yyerror(const char *ErrorMsg); // Forward declarations to prevent "implicit
29 int yylex(); // declaration" of xxx warnings.
34 static Module *ParserResult;
35 std::string CurFilename;
37 // DEBUG_UPREFS - Define this symbol if you want to enable debugging output
38 // relating to upreferences in the input stream.
40 //#define DEBUG_UPREFS 1
42 #define UR_OUT(X) std::cerr << X
47 #define YYERROR_VERBOSE 1
49 // HACK ALERT: This variable is used to implement the automatic conversion of
50 // variable argument instructions from their old to new forms. When this
51 // compatiblity "Feature" is removed, this should be too.
53 static BasicBlock *CurBB;
54 static bool ObsoleteVarArgs;
57 // This contains info used when building the body of a function. It is
58 // destroyed when the function is completed.
60 typedef std::vector<Value *> ValueList; // Numbered defs
61 static void ResolveDefinitions(std::vector<ValueList> &LateResolvers,
62 std::vector<ValueList> *FutureLateResolvers = 0);
64 static struct PerModuleInfo {
65 Module *CurrentModule;
66 std::vector<ValueList> Values; // Module level numbered definitions
67 std::vector<ValueList> LateResolveValues;
68 std::vector<PATypeHolder> Types;
69 std::map<ValID, PATypeHolder> LateResolveTypes;
71 // GlobalRefs - This maintains a mapping between <Type, ValID>'s and forward
72 // references to global values. Global values may be referenced before they
73 // are defined, and if so, the temporary object that they represent is held
74 // here. This is used for forward references of ConstantPointerRefs.
76 typedef std::map<std::pair<const PointerType *,
77 ValID>, GlobalVariable*> GlobalRefsType;
78 GlobalRefsType GlobalRefs;
81 // If we could not resolve some functions at function compilation time
82 // (calls to functions before they are defined), resolve them now... Types
83 // are resolved when the constant pool has been completely parsed.
85 ResolveDefinitions(LateResolveValues);
87 // Check to make sure that all global value forward references have been
90 if (!GlobalRefs.empty()) {
91 std::string UndefinedReferences = "Unresolved global references exist:\n";
93 for (GlobalRefsType::iterator I = GlobalRefs.begin(), E =GlobalRefs.end();
95 UndefinedReferences += " " + I->first.first->getDescription() + " " +
96 I->first.second.getName() + "\n";
98 ThrowException(UndefinedReferences);
101 Values.clear(); // Clear out function local definitions
107 // DeclareNewGlobalValue - Called every time a new GV has been defined. This
108 // is used to remove things from the forward declaration map, resolving them
109 // to the correct thing as needed.
111 void DeclareNewGlobalValue(GlobalValue *GV, ValID D) {
112 // Check to see if there is a forward reference to this global variable...
113 // if there is, eliminate it and patch the reference to use the new def'n.
114 GlobalRefsType::iterator I =
115 GlobalRefs.find(std::make_pair(GV->getType(), D));
117 if (I != GlobalRefs.end()) {
118 GlobalVariable *OldGV = I->second; // Get the placeholder...
119 I->first.second.destroy(); // Free string memory if necessary
121 // Loop over all of the uses of the GlobalValue. The only thing they are
122 // allowed to be is ConstantPointerRef's.
123 assert(OldGV->hasOneUse() && "Only one reference should exist!");
124 User *U = OldGV->use_back(); // Must be a ConstantPointerRef...
125 ConstantPointerRef *CPR = cast<ConstantPointerRef>(U);
127 // Change the const pool reference to point to the real global variable
128 // now. This should drop a use from the OldGV.
129 CPR->mutateReferences(OldGV, GV);
130 assert(OldGV->use_empty() && "All uses should be gone now!");
132 // Remove OldGV from the module...
133 CurrentModule->getGlobalList().remove(OldGV);
134 delete OldGV; // Delete the old placeholder
136 // Remove the map entry for the global now that it has been created...
143 static struct PerFunctionInfo {
144 Function *CurrentFunction; // Pointer to current function being created
146 std::vector<ValueList> Values; // Keep track of numbered definitions
147 std::vector<ValueList> LateResolveValues;
148 std::vector<PATypeHolder> Types;
149 std::map<ValID, PATypeHolder> LateResolveTypes;
150 SymbolTable LocalSymtab;
151 bool isDeclare; // Is this function a forward declararation?
153 inline PerFunctionInfo() {
158 inline void FunctionStart(Function *M) {
162 void FunctionDone() {
163 // If we could not resolve some blocks at parsing time (forward branches)
164 // resolve the branches now...
165 ResolveDefinitions(LateResolveValues, &CurModule.LateResolveValues);
167 // Make sure to resolve any constant expr references that might exist within
168 // the function we just declared itself.
170 if (CurrentFunction->hasName()) {
171 FID = ValID::create((char*)CurrentFunction->getName().c_str());
173 unsigned Slot = CurrentFunction->getType()->getUniqueID();
174 assert(CurModule.Values.size() > Slot && "Function not inserted?");
175 // Figure out which slot number if is...
176 for (unsigned i = 0; ; ++i) {
177 assert(i < CurModule.Values[Slot].size() && "Function not found!");
178 if (CurModule.Values[Slot][i] == CurrentFunction) {
179 FID = ValID::create((int)i);
184 CurModule.DeclareNewGlobalValue(CurrentFunction, FID);
186 Values.clear(); // Clear out function local definitions
187 Types.clear(); // Clear out function local types
188 LocalSymtab.clear(); // Clear out function local symbol table
192 } CurFun; // Info for the current function...
194 static bool inFunctionScope() { return CurFun.CurrentFunction != 0; }
197 //===----------------------------------------------------------------------===//
198 // Code to handle definitions of all the types
199 //===----------------------------------------------------------------------===//
201 static int InsertValue(Value *D,
202 std::vector<ValueList> &ValueTab = CurFun.Values) {
203 if (D->hasName()) return -1; // Is this a numbered definition?
205 // Yes, insert the value into the value table...
206 unsigned type = D->getType()->getUniqueID();
207 if (ValueTab.size() <= type)
208 ValueTab.resize(type+1, ValueList());
209 //printf("Values[%d][%d] = %d\n", type, ValueTab[type].size(), D);
210 ValueTab[type].push_back(D);
211 return ValueTab[type].size()-1;
214 // TODO: FIXME when Type are not const
215 static void InsertType(const Type *Ty, std::vector<PATypeHolder> &Types) {
219 static const Type *getTypeVal(const ValID &D, bool DoNotImprovise = false) {
221 case ValID::NumberVal: { // Is it a numbered definition?
222 unsigned Num = (unsigned)D.Num;
224 // Module constants occupy the lowest numbered slots...
225 if (Num < CurModule.Types.size())
226 return CurModule.Types[Num];
228 Num -= CurModule.Types.size();
230 // Check that the number is within bounds...
231 if (Num <= CurFun.Types.size())
232 return CurFun.Types[Num];
235 case ValID::NameVal: { // Is it a named definition?
236 std::string Name(D.Name);
237 SymbolTable *SymTab = 0;
239 if (inFunctionScope()) {
240 SymTab = &CurFun.CurrentFunction->getSymbolTable();
241 N = SymTab->lookup(Type::TypeTy, Name);
245 // Symbol table doesn't automatically chain yet... because the function
246 // hasn't been added to the module...
248 SymTab = &CurModule.CurrentModule->getSymbolTable();
249 N = SymTab->lookup(Type::TypeTy, Name);
253 D.destroy(); // Free old strdup'd memory...
254 return cast<Type>(N);
257 ThrowException("Internal parser error: Invalid symbol type reference!");
260 // If we reached here, we referenced either a symbol that we don't know about
261 // or an id number that hasn't been read yet. We may be referencing something
262 // forward, so just create an entry to be resolved later and get to it...
264 if (DoNotImprovise) return 0; // Do we just want a null to be returned?
266 std::map<ValID, PATypeHolder> &LateResolver = inFunctionScope() ?
267 CurFun.LateResolveTypes : CurModule.LateResolveTypes;
269 std::map<ValID, PATypeHolder>::iterator I = LateResolver.find(D);
270 if (I != LateResolver.end()) {
274 Type *Typ = OpaqueType::get();
275 LateResolver.insert(std::make_pair(D, Typ));
279 static Value *lookupInSymbolTable(const Type *Ty, const std::string &Name) {
280 SymbolTable &SymTab =
281 inFunctionScope() ? CurFun.CurrentFunction->getSymbolTable() :
282 CurModule.CurrentModule->getSymbolTable();
283 return SymTab.lookup(Ty, Name);
286 // getValNonImprovising - Look up the value specified by the provided type and
287 // the provided ValID. If the value exists and has already been defined, return
288 // it. Otherwise return null.
290 static Value *getValNonImprovising(const Type *Ty, const ValID &D) {
291 if (isa<FunctionType>(Ty))
292 ThrowException("Functions are not values and "
293 "must be referenced as pointers");
296 case ValID::NumberVal: { // Is it a numbered definition?
297 unsigned type = Ty->getUniqueID();
298 unsigned Num = (unsigned)D.Num;
300 // Module constants occupy the lowest numbered slots...
301 if (type < CurModule.Values.size()) {
302 if (Num < CurModule.Values[type].size())
303 return CurModule.Values[type][Num];
305 Num -= CurModule.Values[type].size();
308 // Make sure that our type is within bounds
309 if (CurFun.Values.size() <= type) return 0;
311 // Check that the number is within bounds...
312 if (CurFun.Values[type].size() <= Num) return 0;
314 return CurFun.Values[type][Num];
317 case ValID::NameVal: { // Is it a named definition?
318 Value *N = lookupInSymbolTable(Ty, std::string(D.Name));
319 if (N == 0) return 0;
321 D.destroy(); // Free old strdup'd memory...
325 // Check to make sure that "Ty" is an integral type, and that our
326 // value will fit into the specified type...
327 case ValID::ConstSIntVal: // Is it a constant pool reference??
328 if (!ConstantSInt::isValueValidForType(Ty, D.ConstPool64))
329 ThrowException("Signed integral constant '" +
330 itostr(D.ConstPool64) + "' is invalid for type '" +
331 Ty->getDescription() + "'!");
332 return ConstantSInt::get(Ty, D.ConstPool64);
334 case ValID::ConstUIntVal: // Is it an unsigned const pool reference?
335 if (!ConstantUInt::isValueValidForType(Ty, D.UConstPool64)) {
336 if (!ConstantSInt::isValueValidForType(Ty, D.ConstPool64)) {
337 ThrowException("Integral constant '" + utostr(D.UConstPool64) +
338 "' is invalid or out of range!");
339 } else { // This is really a signed reference. Transmogrify.
340 return ConstantSInt::get(Ty, D.ConstPool64);
343 return ConstantUInt::get(Ty, D.UConstPool64);
346 case ValID::ConstFPVal: // Is it a floating point const pool reference?
347 if (!ConstantFP::isValueValidForType(Ty, D.ConstPoolFP))
348 ThrowException("FP constant invalid for type!!");
349 return ConstantFP::get(Ty, D.ConstPoolFP);
351 case ValID::ConstNullVal: // Is it a null value?
352 if (!isa<PointerType>(Ty))
353 ThrowException("Cannot create a a non pointer null!");
354 return ConstantPointerNull::get(cast<PointerType>(Ty));
356 case ValID::ConstantVal: // Fully resolved constant?
357 if (D.ConstantValue->getType() != Ty)
358 ThrowException("Constant expression type different from required type!");
359 return D.ConstantValue;
362 assert(0 && "Unhandled case!");
366 assert(0 && "Unhandled case!");
371 // getVal - This function is identical to getValNonImprovising, except that if a
372 // value is not already defined, it "improvises" by creating a placeholder var
373 // that looks and acts just like the requested variable. When the value is
374 // defined later, all uses of the placeholder variable are replaced with the
377 static Value *getVal(const Type *Ty, const ValID &D) {
378 assert(Ty != Type::TypeTy && "Should use getTypeVal for types!");
380 // See if the value has already been defined...
381 Value *V = getValNonImprovising(Ty, D);
384 // If we reached here, we referenced either a symbol that we don't know about
385 // or an id number that hasn't been read yet. We may be referencing something
386 // forward, so just create an entry to be resolved later and get to it...
389 switch (Ty->getPrimitiveID()) {
390 case Type::LabelTyID: d = new BBPlaceHolder(Ty, D); break;
391 default: d = new ValuePlaceHolder(Ty, D); break;
394 assert(d != 0 && "How did we not make something?");
395 if (inFunctionScope())
396 InsertValue(d, CurFun.LateResolveValues);
398 InsertValue(d, CurModule.LateResolveValues);
403 //===----------------------------------------------------------------------===//
404 // Code to handle forward references in instructions
405 //===----------------------------------------------------------------------===//
407 // This code handles the late binding needed with statements that reference
408 // values not defined yet... for example, a forward branch, or the PHI node for
411 // This keeps a table (CurFun.LateResolveValues) of all such forward references
412 // and back patchs after we are done.
415 // ResolveDefinitions - If we could not resolve some defs at parsing
416 // time (forward branches, phi functions for loops, etc...) resolve the
419 static void ResolveDefinitions(std::vector<ValueList> &LateResolvers,
420 std::vector<ValueList> *FutureLateResolvers) {
421 // Loop over LateResolveDefs fixing up stuff that couldn't be resolved
422 for (unsigned ty = 0; ty < LateResolvers.size(); ty++) {
423 while (!LateResolvers[ty].empty()) {
424 Value *V = LateResolvers[ty].back();
425 assert(!isa<Type>(V) && "Types should be in LateResolveTypes!");
427 LateResolvers[ty].pop_back();
428 ValID &DID = getValIDFromPlaceHolder(V);
430 Value *TheRealValue = getValNonImprovising(Type::getUniqueIDType(ty),DID);
432 V->replaceAllUsesWith(TheRealValue);
434 } else if (FutureLateResolvers) {
435 // Functions have their unresolved items forwarded to the module late
437 InsertValue(V, *FutureLateResolvers);
439 if (DID.Type == ValID::NameVal)
440 ThrowException("Reference to an invalid definition: '" +DID.getName()+
441 "' of type '" + V->getType()->getDescription() + "'",
442 getLineNumFromPlaceHolder(V));
444 ThrowException("Reference to an invalid definition: #" +
445 itostr(DID.Num) + " of type '" +
446 V->getType()->getDescription() + "'",
447 getLineNumFromPlaceHolder(V));
452 LateResolvers.clear();
455 // ResolveTypeTo - A brand new type was just declared. This means that (if
456 // name is not null) things referencing Name can be resolved. Otherwise, things
457 // refering to the number can be resolved. Do this now.
459 static void ResolveTypeTo(char *Name, const Type *ToTy) {
460 std::vector<PATypeHolder> &Types = inFunctionScope() ?
461 CurFun.Types : CurModule.Types;
464 if (Name) D = ValID::create(Name);
465 else D = ValID::create((int)Types.size());
467 std::map<ValID, PATypeHolder> &LateResolver = inFunctionScope() ?
468 CurFun.LateResolveTypes : CurModule.LateResolveTypes;
470 std::map<ValID, PATypeHolder>::iterator I = LateResolver.find(D);
471 if (I != LateResolver.end()) {
472 ((DerivedType*)I->second.get())->refineAbstractTypeTo(ToTy);
473 LateResolver.erase(I);
477 // ResolveTypes - At this point, all types should be resolved. Any that aren't
480 static void ResolveTypes(std::map<ValID, PATypeHolder> &LateResolveTypes) {
481 if (!LateResolveTypes.empty()) {
482 const ValID &DID = LateResolveTypes.begin()->first;
484 if (DID.Type == ValID::NameVal)
485 ThrowException("Reference to an invalid type: '" +DID.getName() + "'");
487 ThrowException("Reference to an invalid type: #" + itostr(DID.Num));
492 // setValueName - Set the specified value to the name given. The name may be
493 // null potentially, in which case this is a noop. The string passed in is
494 // assumed to be a malloc'd string buffer, and is freed by this function.
496 // This function returns true if the value has already been defined, but is
497 // allowed to be redefined in the specified context. If the name is a new name
498 // for the typeplane, false is returned.
500 static bool setValueName(Value *V, char *NameStr) {
501 if (NameStr == 0) return false;
503 std::string Name(NameStr); // Copy string
504 free(NameStr); // Free old string
506 if (V->getType() == Type::VoidTy)
507 ThrowException("Can't assign name '" + Name +
508 "' to a null valued instruction!");
510 SymbolTable &ST = inFunctionScope() ?
511 CurFun.CurrentFunction->getSymbolTable() :
512 CurModule.CurrentModule->getSymbolTable();
514 Value *Existing = ST.lookup(V->getType(), Name);
515 if (Existing) { // Inserting a name that is already defined???
516 // There is only one case where this is allowed: when we are refining an
517 // opaque type. In this case, Existing will be an opaque type.
518 if (const Type *Ty = dyn_cast<Type>(Existing)) {
519 if (const OpaqueType *OpTy = dyn_cast<OpaqueType>(Ty)) {
520 // We ARE replacing an opaque type!
521 ((OpaqueType*)OpTy)->refineAbstractTypeTo(cast<Type>(V));
526 // Otherwise, we are a simple redefinition of a value, check to see if it
527 // is defined the same as the old one...
528 if (const Type *Ty = dyn_cast<Type>(Existing)) {
529 if (Ty == cast<Type>(V)) return true; // Yes, it's equal.
530 // std::cerr << "Type: " << Ty->getDescription() << " != "
531 // << cast<Type>(V)->getDescription() << "!\n";
532 } else if (const Constant *C = dyn_cast<Constant>(Existing)) {
533 if (C == V) return true; // Constants are equal to themselves
534 } else if (GlobalVariable *EGV = dyn_cast<GlobalVariable>(Existing)) {
535 // We are allowed to redefine a global variable in two circumstances:
536 // 1. If at least one of the globals is uninitialized or
537 // 2. If both initializers have the same value.
539 if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V)) {
540 if (!EGV->hasInitializer() || !GV->hasInitializer() ||
541 EGV->getInitializer() == GV->getInitializer()) {
543 // Make sure the existing global version gets the initializer! Make
544 // sure that it also gets marked const if the new version is.
545 if (GV->hasInitializer() && !EGV->hasInitializer())
546 EGV->setInitializer(GV->getInitializer());
547 if (GV->isConstant())
548 EGV->setConstant(true);
549 EGV->setLinkage(GV->getLinkage());
551 delete GV; // Destroy the duplicate!
552 return true; // They are equivalent!
557 ThrowException("Redefinition of value named '" + Name + "' in the '" +
558 V->getType()->getDescription() + "' type plane!");
562 V->setName(Name, &ST);
564 // If we're in function scope
565 if (inFunctionScope()) {
566 // Look up the symbol in the function's local symboltable
567 Existing = CurFun.LocalSymtab.lookup(V->getType(),Name);
569 // If it already exists
572 ThrowException("Redefinition of value named '" + Name + "' in the '" +
573 V->getType()->getDescription() + "' type plane!");
575 // otherwise, since it doesn't exist
578 CurFun.LocalSymtab.insert(V);
585 //===----------------------------------------------------------------------===//
586 // Code for handling upreferences in type names...
589 // TypeContains - Returns true if Ty contains E in it.
591 static bool TypeContains(const Type *Ty, const Type *E) {
592 return find(df_begin(Ty), df_end(Ty), E) != df_end(Ty);
596 static std::vector<std::pair<unsigned, OpaqueType *> > UpRefs;
598 static PATypeHolder HandleUpRefs(const Type *ty) {
600 UR_OUT("Type '" << ty->getDescription() <<
601 "' newly formed. Resolving upreferences.\n" <<
602 UpRefs.size() << " upreferences active!\n");
603 for (unsigned i = 0; i < UpRefs.size(); ) {
604 UR_OUT(" UR#" << i << " - TypeContains(" << Ty->getDescription() << ", "
605 << UpRefs[i].second->getDescription() << ") = "
606 << (TypeContains(Ty, UpRefs[i].second) ? "true" : "false") << endl);
607 if (TypeContains(Ty, UpRefs[i].second)) {
608 unsigned Level = --UpRefs[i].first; // Decrement level of upreference
609 UR_OUT(" Uplevel Ref Level = " << Level << endl);
610 if (Level == 0) { // Upreference should be resolved!
611 UR_OUT(" * Resolving upreference for "
612 << UpRefs[i].second->getDescription() << endl;
613 std::string OldName = UpRefs[i].second->getDescription());
614 UpRefs[i].second->refineAbstractTypeTo(Ty);
615 UpRefs.erase(UpRefs.begin()+i); // Remove from upreference list...
616 UR_OUT(" * Type '" << OldName << "' refined upreference to: "
617 << (const void*)Ty << ", " << Ty->getDescription() << endl);
622 ++i; // Otherwise, no resolve, move on...
624 // FIXME: TODO: this should return the updated type
629 //===----------------------------------------------------------------------===//
630 // RunVMAsmParser - Define an interface to this parser
631 //===----------------------------------------------------------------------===//
633 Module *RunVMAsmParser(const std::string &Filename, FILE *F) {
635 CurFilename = Filename;
636 llvmAsmlineno = 1; // Reset the current line number...
637 ObsoleteVarArgs = false;
639 // Allocate a new module to read
640 CurModule.CurrentModule = new Module(Filename);
643 yyparse(); // Parse the file.
645 // Clear the symbol table so it doesn't complain when it
647 CurFun.LocalSymtab.clear();
651 Module *Result = ParserResult;
653 // Check to see if they called va_start but not va_arg..
654 if (!ObsoleteVarArgs)
655 if (Function *F = Result->getNamedFunction("llvm.va_start"))
656 if (F->asize() == 1) {
657 std::cerr << "WARNING: this file uses obsolete features. "
658 << "Assemble and disassemble to update it.\n";
659 ObsoleteVarArgs = true;
663 if (ObsoleteVarArgs) {
664 // If the user is making use of obsolete varargs intrinsics, adjust them for
666 if (Function *F = Result->getNamedFunction("llvm.va_start")) {
667 assert(F->asize() == 1 && "Obsolete va_start takes 1 argument!");
669 const Type *RetTy = F->getFunctionType()->getParamType(0);
670 RetTy = cast<PointerType>(RetTy)->getElementType();
671 Function *NF = Result->getOrInsertFunction("llvm.va_start", RetTy, 0);
673 while (!F->use_empty()) {
674 CallInst *CI = cast<CallInst>(F->use_back());
675 Value *V = new CallInst(NF, "", CI);
676 new StoreInst(V, CI->getOperand(1), CI);
677 CI->getParent()->getInstList().erase(CI);
679 Result->getFunctionList().erase(F);
682 if (Function *F = Result->getNamedFunction("llvm.va_end")) {
683 assert(F->asize() == 1 && "Obsolete va_end takes 1 argument!");
684 const Type *ArgTy = F->getFunctionType()->getParamType(0);
685 ArgTy = cast<PointerType>(ArgTy)->getElementType();
686 Function *NF = Result->getOrInsertFunction("llvm.va_end", Type::VoidTy,
689 while (!F->use_empty()) {
690 CallInst *CI = cast<CallInst>(F->use_back());
691 Value *V = new LoadInst(CI->getOperand(1), "", CI);
692 new CallInst(NF, V, "", CI);
693 CI->getParent()->getInstList().erase(CI);
695 Result->getFunctionList().erase(F);
698 if (Function *F = Result->getNamedFunction("llvm.va_copy")) {
699 assert(F->asize() == 2 && "Obsolete va_copy takes 2 argument!");
700 const Type *ArgTy = F->getFunctionType()->getParamType(0);
701 ArgTy = cast<PointerType>(ArgTy)->getElementType();
702 Function *NF = Result->getOrInsertFunction("llvm.va_copy", ArgTy,
705 while (!F->use_empty()) {
706 CallInst *CI = cast<CallInst>(F->use_back());
707 Value *V = new CallInst(NF, CI->getOperand(2), "", CI);
708 new StoreInst(V, CI->getOperand(1), CI);
709 CI->getParent()->getInstList().erase(CI);
711 Result->getFunctionList().erase(F);
715 llvmAsmin = stdin; // F is about to go away, don't use it anymore...
721 } // End llvm namespace
723 using namespace llvm;
728 llvm::Module *ModuleVal;
729 llvm::Function *FunctionVal;
730 std::pair<llvm::PATypeHolder*, char*> *ArgVal;
731 llvm::BasicBlock *BasicBlockVal;
732 llvm::TerminatorInst *TermInstVal;
733 llvm::Instruction *InstVal;
734 llvm::Constant *ConstVal;
736 const llvm::Type *PrimType;
737 llvm::PATypeHolder *TypeVal;
738 llvm::Value *ValueVal;
740 std::vector<std::pair<llvm::PATypeHolder*,char*> > *ArgList;
741 std::vector<llvm::Value*> *ValueList;
742 std::list<llvm::PATypeHolder> *TypeList;
743 std::list<std::pair<llvm::Value*,
744 llvm::BasicBlock*> > *PHIList; // Represent the RHS of PHI node
745 std::vector<std::pair<llvm::Constant*, llvm::BasicBlock*> > *JumpTable;
746 std::vector<llvm::Constant*> *ConstVector;
748 llvm::GlobalValue::LinkageTypes Linkage;
756 char *StrVal; // This memory is strdup'd!
757 llvm::ValID ValIDVal; // strdup'd memory maybe!
759 llvm::Instruction::BinaryOps BinaryOpVal;
760 llvm::Instruction::TermOps TermOpVal;
761 llvm::Instruction::MemoryOps MemOpVal;
762 llvm::Instruction::OtherOps OtherOpVal;
763 llvm::Module::Endianness Endianness;
766 %type <ModuleVal> Module FunctionList
767 %type <FunctionVal> Function FunctionProto FunctionHeader BasicBlockList
768 %type <BasicBlockVal> BasicBlock InstructionList
769 %type <TermInstVal> BBTerminatorInst
770 %type <InstVal> Inst InstVal MemoryInst
771 %type <ConstVal> ConstVal ConstExpr
772 %type <ConstVector> ConstVector
773 %type <ArgList> ArgList ArgListH
774 %type <ArgVal> ArgVal
775 %type <PHIList> PHIList
776 %type <ValueList> ValueRefList ValueRefListE // For call param lists
777 %type <ValueList> IndexList // For GEP derived indices
778 %type <TypeList> TypeListI ArgTypeListI
779 %type <JumpTable> JumpTable
780 %type <BoolVal> GlobalType // GLOBAL or CONSTANT?
781 %type <BoolVal> OptVolatile // 'volatile' or not
782 %type <Linkage> OptLinkage
783 %type <Endianness> BigOrLittle
785 // ValueRef - Unresolved reference to a definition or BB
786 %type <ValIDVal> ValueRef ConstValueRef SymbolicValueRef
787 %type <ValueVal> ResolvedVal // <type> <valref> pair
788 // Tokens and types for handling constant integer values
790 // ESINT64VAL - A negative number within long long range
791 %token <SInt64Val> ESINT64VAL
793 // EUINT64VAL - A positive number within uns. long long range
794 %token <UInt64Val> EUINT64VAL
795 %type <SInt64Val> EINT64VAL
797 %token <SIntVal> SINTVAL // Signed 32 bit ints...
798 %token <UIntVal> UINTVAL // Unsigned 32 bit ints...
799 %type <SIntVal> INTVAL
800 %token <FPVal> FPVAL // Float or Double constant
803 %type <TypeVal> Types TypesV UpRTypes UpRTypesV
804 %type <PrimType> SIntType UIntType IntType FPType PrimType // Classifications
805 %token <PrimType> VOID BOOL SBYTE UBYTE SHORT USHORT INT UINT LONG ULONG
806 %token <PrimType> FLOAT DOUBLE TYPE LABEL
808 %token <StrVal> VAR_ID LABELSTR STRINGCONSTANT
809 %type <StrVal> Name OptName OptAssign
812 %token IMPLEMENTATION ZEROINITIALIZER TRUE FALSE BEGINTOK ENDTOK
813 %token DECLARE GLOBAL CONSTANT VOLATILE
814 %token TO EXCEPT DOTDOTDOT NULL_TOK CONST INTERNAL LINKONCE WEAK APPENDING
815 %token OPAQUE NOT EXTERNAL TARGET ENDIAN POINTERSIZE LITTLE BIG
817 // Basic Block Terminating Operators
818 %token <TermOpVal> RET BR SWITCH INVOKE UNWIND
821 %type <BinaryOpVal> BinaryOps // all the binary operators
822 %type <BinaryOpVal> ArithmeticOps LogicalOps SetCondOps // Binops Subcatagories
823 %token <BinaryOpVal> ADD SUB MUL DIV REM AND OR XOR
824 %token <BinaryOpVal> SETLE SETGE SETLT SETGT SETEQ SETNE // Binary Comarators
826 // Memory Instructions
827 %token <MemOpVal> MALLOC ALLOCA FREE LOAD STORE GETELEMENTPTR
830 %type <OtherOpVal> ShiftOps
831 %token <OtherOpVal> PHI_TOK CALL CAST SHL SHR VAARG VANEXT
832 %token VA_ARG // FIXME: OBSOLETE
837 // Handle constant integer size restriction and conversion...
841 if ($1 > (uint32_t)INT32_MAX) // Outside of my range!
842 ThrowException("Value too large for type!");
847 EINT64VAL : ESINT64VAL; // These have same type and can't cause problems...
848 EINT64VAL : EUINT64VAL {
849 if ($1 > (uint64_t)INT64_MAX) // Outside of my range!
850 ThrowException("Value too large for type!");
854 // Operations that are notably excluded from this list include:
855 // RET, BR, & SWITCH because they end basic blocks and are treated specially.
857 ArithmeticOps: ADD | SUB | MUL | DIV | REM;
858 LogicalOps : AND | OR | XOR;
859 SetCondOps : SETLE | SETGE | SETLT | SETGT | SETEQ | SETNE;
860 BinaryOps : ArithmeticOps | LogicalOps | SetCondOps;
862 ShiftOps : SHL | SHR;
864 // These are some types that allow classification if we only want a particular
865 // thing... for example, only a signed, unsigned, or integral type.
866 SIntType : LONG | INT | SHORT | SBYTE;
867 UIntType : ULONG | UINT | USHORT | UBYTE;
868 IntType : SIntType | UIntType;
869 FPType : FLOAT | DOUBLE;
871 // OptAssign - Value producing statements have an optional assignment component
872 OptAssign : Name '=' {
879 OptLinkage : INTERNAL { $$ = GlobalValue::InternalLinkage; } |
880 LINKONCE { $$ = GlobalValue::LinkOnceLinkage; } |
881 WEAK { $$ = GlobalValue::WeakLinkage; } |
882 APPENDING { $$ = GlobalValue::AppendingLinkage; } |
883 /*empty*/ { $$ = GlobalValue::ExternalLinkage; };
885 //===----------------------------------------------------------------------===//
886 // Types includes all predefined types... except void, because it can only be
887 // used in specific contexts (function returning void for example). To have
888 // access to it, a user must explicitly use TypesV.
891 // TypesV includes all of 'Types', but it also includes the void type.
892 TypesV : Types | VOID { $$ = new PATypeHolder($1); };
893 UpRTypesV : UpRTypes | VOID { $$ = new PATypeHolder($1); };
897 ThrowException("Invalid upreference in type: " + (*$1)->getDescription());
902 // Derived types are added later...
904 PrimType : BOOL | SBYTE | UBYTE | SHORT | USHORT | INT | UINT ;
905 PrimType : LONG | ULONG | FLOAT | DOUBLE | TYPE | LABEL;
907 $$ = new PATypeHolder(OpaqueType::get());
910 $$ = new PATypeHolder($1);
912 UpRTypes : SymbolicValueRef { // Named types are also simple types...
913 $$ = new PATypeHolder(getTypeVal($1));
916 // Include derived types in the Types production.
918 UpRTypes : '\\' EUINT64VAL { // Type UpReference
919 if ($2 > (uint64_t)INT64_MAX) ThrowException("Value out of range!");
920 OpaqueType *OT = OpaqueType::get(); // Use temporary placeholder
921 UpRefs.push_back(std::make_pair((unsigned)$2, OT)); // Add to vector...
922 $$ = new PATypeHolder(OT);
923 UR_OUT("New Upreference!\n");
925 | UpRTypesV '(' ArgTypeListI ')' { // Function derived type?
926 std::vector<const Type*> Params;
927 mapto($3->begin(), $3->end(), std::back_inserter(Params),
928 std::mem_fun_ref(&PATypeHolder::get));
929 bool isVarArg = Params.size() && Params.back() == Type::VoidTy;
930 if (isVarArg) Params.pop_back();
932 $$ = new PATypeHolder(HandleUpRefs(FunctionType::get(*$1,Params,isVarArg)));
933 delete $3; // Delete the argument list
934 delete $1; // Delete the old type handle
936 | '[' EUINT64VAL 'x' UpRTypes ']' { // Sized array type?
937 $$ = new PATypeHolder(HandleUpRefs(ArrayType::get(*$4, (unsigned)$2)));
940 | '{' TypeListI '}' { // Structure type?
941 std::vector<const Type*> Elements;
942 mapto($2->begin(), $2->end(), std::back_inserter(Elements),
943 std::mem_fun_ref(&PATypeHolder::get));
945 $$ = new PATypeHolder(HandleUpRefs(StructType::get(Elements)));
948 | '{' '}' { // Empty structure type?
949 $$ = new PATypeHolder(StructType::get(std::vector<const Type*>()));
951 | UpRTypes '*' { // Pointer type?
952 $$ = new PATypeHolder(HandleUpRefs(PointerType::get(*$1)));
956 // TypeList - Used for struct declarations and as a basis for function type
957 // declaration type lists
959 TypeListI : UpRTypes {
960 $$ = new std::list<PATypeHolder>();
961 $$->push_back(*$1); delete $1;
963 | TypeListI ',' UpRTypes {
964 ($$=$1)->push_back(*$3); delete $3;
967 // ArgTypeList - List of types for a function type declaration...
968 ArgTypeListI : TypeListI
969 | TypeListI ',' DOTDOTDOT {
970 ($$=$1)->push_back(Type::VoidTy);
973 ($$ = new std::list<PATypeHolder>())->push_back(Type::VoidTy);
976 $$ = new std::list<PATypeHolder>();
979 // ConstVal - The various declarations that go into the constant pool. This
980 // production is used ONLY to represent constants that show up AFTER a 'const',
981 // 'constant' or 'global' token at global scope. Constants that can be inlined
982 // into other expressions (such as integers and constexprs) are handled by the
983 // ResolvedVal, ValueRef and ConstValueRef productions.
985 ConstVal: Types '[' ConstVector ']' { // Nonempty unsized arr
986 const ArrayType *ATy = dyn_cast<ArrayType>($1->get());
988 ThrowException("Cannot make array constant with type: '" +
989 (*$1)->getDescription() + "'!");
990 const Type *ETy = ATy->getElementType();
991 int NumElements = ATy->getNumElements();
993 // Verify that we have the correct size...
994 if (NumElements != -1 && NumElements != (int)$3->size())
995 ThrowException("Type mismatch: constant sized array initialized with " +
996 utostr($3->size()) + " arguments, but has size of " +
997 itostr(NumElements) + "!");
999 // Verify all elements are correct type!
1000 for (unsigned i = 0; i < $3->size(); i++) {
1001 if (ETy != (*$3)[i]->getType())
1002 ThrowException("Element #" + utostr(i) + " is not of type '" +
1003 ETy->getDescription() +"' as required!\nIt is of type '"+
1004 (*$3)[i]->getType()->getDescription() + "'.");
1007 $$ = ConstantArray::get(ATy, *$3);
1008 delete $1; delete $3;
1011 const ArrayType *ATy = dyn_cast<ArrayType>($1->get());
1013 ThrowException("Cannot make array constant with type: '" +
1014 (*$1)->getDescription() + "'!");
1016 int NumElements = ATy->getNumElements();
1017 if (NumElements != -1 && NumElements != 0)
1018 ThrowException("Type mismatch: constant sized array initialized with 0"
1019 " arguments, but has size of " + itostr(NumElements) +"!");
1020 $$ = ConstantArray::get(ATy, std::vector<Constant*>());
1023 | Types 'c' STRINGCONSTANT {
1024 const ArrayType *ATy = dyn_cast<ArrayType>($1->get());
1026 ThrowException("Cannot make array constant with type: '" +
1027 (*$1)->getDescription() + "'!");
1029 int NumElements = ATy->getNumElements();
1030 const Type *ETy = ATy->getElementType();
1031 char *EndStr = UnEscapeLexed($3, true);
1032 if (NumElements != -1 && NumElements != (EndStr-$3))
1033 ThrowException("Can't build string constant of size " +
1034 itostr((int)(EndStr-$3)) +
1035 " when array has size " + itostr(NumElements) + "!");
1036 std::vector<Constant*> Vals;
1037 if (ETy == Type::SByteTy) {
1038 for (char *C = $3; C != EndStr; ++C)
1039 Vals.push_back(ConstantSInt::get(ETy, *C));
1040 } else if (ETy == Type::UByteTy) {
1041 for (char *C = $3; C != EndStr; ++C)
1042 Vals.push_back(ConstantUInt::get(ETy, (unsigned char)*C));
1045 ThrowException("Cannot build string arrays of non byte sized elements!");
1048 $$ = ConstantArray::get(ATy, Vals);
1051 | Types '{' ConstVector '}' {
1052 const StructType *STy = dyn_cast<StructType>($1->get());
1054 ThrowException("Cannot make struct constant with type: '" +
1055 (*$1)->getDescription() + "'!");
1057 if ($3->size() != STy->getNumContainedTypes())
1058 ThrowException("Illegal number of initializers for structure type!");
1060 // Check to ensure that constants are compatible with the type initializer!
1061 for (unsigned i = 0, e = $3->size(); i != e; ++i)
1062 if ((*$3)[i]->getType() != STy->getElementTypes()[i])
1063 ThrowException("Expected type '" +
1064 STy->getElementTypes()[i]->getDescription() +
1065 "' for element #" + utostr(i) +
1066 " of structure initializer!");
1068 $$ = ConstantStruct::get(STy, *$3);
1069 delete $1; delete $3;
1072 const StructType *STy = dyn_cast<StructType>($1->get());
1074 ThrowException("Cannot make struct constant with type: '" +
1075 (*$1)->getDescription() + "'!");
1077 if (STy->getNumContainedTypes() != 0)
1078 ThrowException("Illegal number of initializers for structure type!");
1080 $$ = ConstantStruct::get(STy, std::vector<Constant*>());
1084 const PointerType *PTy = dyn_cast<PointerType>($1->get());
1086 ThrowException("Cannot make null pointer constant with type: '" +
1087 (*$1)->getDescription() + "'!");
1089 $$ = ConstantPointerNull::get(PTy);
1092 | Types SymbolicValueRef {
1093 const PointerType *Ty = dyn_cast<PointerType>($1->get());
1095 ThrowException("Global const reference must be a pointer type!");
1097 // ConstExprs can exist in the body of a function, thus creating
1098 // ConstantPointerRefs whenever they refer to a variable. Because we are in
1099 // the context of a function, getValNonImprovising will search the functions
1100 // symbol table instead of the module symbol table for the global symbol,
1101 // which throws things all off. To get around this, we just tell
1102 // getValNonImprovising that we are at global scope here.
1104 Function *SavedCurFn = CurFun.CurrentFunction;
1105 CurFun.CurrentFunction = 0;
1107 Value *V = getValNonImprovising(Ty, $2);
1109 CurFun.CurrentFunction = SavedCurFn;
1111 // If this is an initializer for a constant pointer, which is referencing a
1112 // (currently) undefined variable, create a stub now that shall be replaced
1113 // in the future with the right type of variable.
1116 assert(isa<PointerType>(Ty) && "Globals may only be used as pointers!");
1117 const PointerType *PT = cast<PointerType>(Ty);
1119 // First check to see if the forward references value is already created!
1120 PerModuleInfo::GlobalRefsType::iterator I =
1121 CurModule.GlobalRefs.find(std::make_pair(PT, $2));
1123 if (I != CurModule.GlobalRefs.end()) {
1124 V = I->second; // Placeholder already exists, use it...
1126 // TODO: Include line number info by creating a subclass of
1127 // TODO: GlobalVariable here that includes the said information!
1129 // Create a placeholder for the global variable reference...
1130 GlobalVariable *GV = new GlobalVariable(PT->getElementType(),
1132 GlobalValue::ExternalLinkage);
1133 // Keep track of the fact that we have a forward ref to recycle it
1134 CurModule.GlobalRefs.insert(std::make_pair(std::make_pair(PT, $2), GV));
1136 // Must temporarily push this value into the module table...
1137 CurModule.CurrentModule->getGlobalList().push_back(GV);
1142 GlobalValue *GV = cast<GlobalValue>(V);
1143 $$ = ConstantPointerRef::get(GV);
1144 delete $1; // Free the type handle
1147 if ($1->get() != $2->getType())
1148 ThrowException("Mismatched types for constant expression!");
1152 | Types ZEROINITIALIZER {
1153 $$ = Constant::getNullValue($1->get());
1157 ConstVal : SIntType EINT64VAL { // integral constants
1158 if (!ConstantSInt::isValueValidForType($1, $2))
1159 ThrowException("Constant value doesn't fit in type!");
1160 $$ = ConstantSInt::get($1, $2);
1162 | UIntType EUINT64VAL { // integral constants
1163 if (!ConstantUInt::isValueValidForType($1, $2))
1164 ThrowException("Constant value doesn't fit in type!");
1165 $$ = ConstantUInt::get($1, $2);
1167 | BOOL TRUE { // Boolean constants
1168 $$ = ConstantBool::True;
1170 | BOOL FALSE { // Boolean constants
1171 $$ = ConstantBool::False;
1173 | FPType FPVAL { // Float & Double constants
1174 $$ = ConstantFP::get($1, $2);
1178 ConstExpr: CAST '(' ConstVal TO Types ')' {
1179 if (!$3->getType()->isFirstClassType())
1180 ThrowException("cast constant expression from a non-primitive type: '" +
1181 $3->getType()->getDescription() + "'!");
1182 if (!$5->get()->isFirstClassType())
1183 ThrowException("cast constant expression to a non-primitive type: '" +
1184 $5->get()->getDescription() + "'!");
1185 $$ = ConstantExpr::getCast($3, $5->get());
1188 | GETELEMENTPTR '(' ConstVal IndexList ')' {
1189 if (!isa<PointerType>($3->getType()))
1190 ThrowException("GetElementPtr requires a pointer operand!");
1193 GetElementPtrInst::getIndexedType($3->getType(), *$4, true);
1195 ThrowException("Index list invalid for constant getelementptr!");
1197 std::vector<Constant*> IdxVec;
1198 for (unsigned i = 0, e = $4->size(); i != e; ++i)
1199 if (Constant *C = dyn_cast<Constant>((*$4)[i]))
1200 IdxVec.push_back(C);
1202 ThrowException("Indices to constant getelementptr must be constants!");
1206 $$ = ConstantExpr::getGetElementPtr($3, IdxVec);
1208 | BinaryOps '(' ConstVal ',' ConstVal ')' {
1209 if ($3->getType() != $5->getType())
1210 ThrowException("Binary operator types must match!");
1211 $$ = ConstantExpr::get($1, $3, $5);
1213 | ShiftOps '(' ConstVal ',' ConstVal ')' {
1214 if ($5->getType() != Type::UByteTy)
1215 ThrowException("Shift count for shift constant must be unsigned byte!");
1216 if (!$3->getType()->isInteger())
1217 ThrowException("Shift constant expression requires integer operand!");
1218 $$ = ConstantExpr::getShift($1, $3, $5);
1222 // ConstVector - A list of comma separated constants.
1223 ConstVector : ConstVector ',' ConstVal {
1224 ($$ = $1)->push_back($3);
1227 $$ = new std::vector<Constant*>();
1232 // GlobalType - Match either GLOBAL or CONSTANT for global declarations...
1233 GlobalType : GLOBAL { $$ = false; } | CONSTANT { $$ = true; };
1236 //===----------------------------------------------------------------------===//
1237 // Rules to match Modules
1238 //===----------------------------------------------------------------------===//
1240 // Module rule: Capture the result of parsing the whole file into a result
1243 Module : FunctionList {
1244 $$ = ParserResult = $1;
1245 CurModule.ModuleDone();
1248 // FunctionList - A list of functions, preceeded by a constant pool.
1250 FunctionList : FunctionList Function {
1252 assert($2->getParent() == 0 && "Function already in module!");
1253 $1->getFunctionList().push_back($2);
1254 CurFun.FunctionDone();
1256 | FunctionList FunctionProto {
1259 | FunctionList IMPLEMENTATION {
1263 $$ = CurModule.CurrentModule;
1264 // Resolve circular types before we parse the body of the module
1265 ResolveTypes(CurModule.LateResolveTypes);
1268 // ConstPool - Constants with optional names assigned to them.
1269 ConstPool : ConstPool OptAssign CONST ConstVal {
1270 if (!setValueName($4, $2))
1273 | ConstPool OptAssign TYPE TypesV { // Types can be defined in the const pool
1274 // Eagerly resolve types. This is not an optimization, this is a
1275 // requirement that is due to the fact that we could have this:
1277 // %list = type { %list * }
1278 // %list = type { %list * } ; repeated type decl
1280 // If types are not resolved eagerly, then the two types will not be
1281 // determined to be the same type!
1283 ResolveTypeTo($2, $4->get());
1285 // TODO: FIXME when Type are not const
1286 if (!setValueName(const_cast<Type*>($4->get()), $2)) {
1287 // If this is not a redefinition of a type...
1289 InsertType($4->get(),
1290 inFunctionScope() ? CurFun.Types : CurModule.Types);
1296 | ConstPool FunctionProto { // Function prototypes can be in const pool
1298 | ConstPool OptAssign OptLinkage GlobalType ConstVal {
1299 const Type *Ty = $5->getType();
1300 // Global declarations appear in Constant Pool
1301 Constant *Initializer = $5;
1302 if (Initializer == 0)
1303 ThrowException("Global value initializer is not a constant!");
1305 GlobalVariable *GV = new GlobalVariable(Ty, $4, $3, Initializer);
1306 if (!setValueName(GV, $2)) { // If not redefining...
1307 CurModule.CurrentModule->getGlobalList().push_back(GV);
1308 int Slot = InsertValue(GV, CurModule.Values);
1311 CurModule.DeclareNewGlobalValue(GV, ValID::create(Slot));
1313 CurModule.DeclareNewGlobalValue(GV, ValID::create(
1314 (char*)GV->getName().c_str()));
1318 | ConstPool OptAssign EXTERNAL GlobalType Types {
1319 const Type *Ty = *$5;
1320 // Global declarations appear in Constant Pool
1321 GlobalVariable *GV = new GlobalVariable(Ty,$4,GlobalValue::ExternalLinkage);
1322 if (!setValueName(GV, $2)) { // If not redefining...
1323 CurModule.CurrentModule->getGlobalList().push_back(GV);
1324 int Slot = InsertValue(GV, CurModule.Values);
1327 CurModule.DeclareNewGlobalValue(GV, ValID::create(Slot));
1329 assert(GV->hasName() && "Not named and not numbered!?");
1330 CurModule.DeclareNewGlobalValue(GV, ValID::create(
1331 (char*)GV->getName().c_str()));
1336 | ConstPool TARGET TargetDefinition {
1338 | /* empty: end of list */ {
1343 BigOrLittle : BIG { $$ = Module::BigEndian; };
1344 BigOrLittle : LITTLE { $$ = Module::LittleEndian; };
1346 TargetDefinition : ENDIAN '=' BigOrLittle {
1347 CurModule.CurrentModule->setEndianness($3);
1349 | POINTERSIZE '=' EUINT64VAL {
1351 CurModule.CurrentModule->setPointerSize(Module::Pointer32);
1353 CurModule.CurrentModule->setPointerSize(Module::Pointer64);
1355 ThrowException("Invalid pointer size: '" + utostr($3) + "'!");
1359 //===----------------------------------------------------------------------===//
1360 // Rules to match Function Headers
1361 //===----------------------------------------------------------------------===//
1363 Name : VAR_ID | STRINGCONSTANT;
1364 OptName : Name | /*empty*/ { $$ = 0; };
1366 ArgVal : Types OptName {
1367 if (*$1 == Type::VoidTy)
1368 ThrowException("void typed arguments are invalid!");
1369 $$ = new std::pair<PATypeHolder*, char*>($1, $2);
1372 ArgListH : ArgListH ',' ArgVal {
1378 $$ = new std::vector<std::pair<PATypeHolder*,char*> >();
1383 ArgList : ArgListH {
1386 | ArgListH ',' DOTDOTDOT {
1388 $$->push_back(std::pair<PATypeHolder*,
1389 char*>(new PATypeHolder(Type::VoidTy), 0));
1392 $$ = new std::vector<std::pair<PATypeHolder*,char*> >();
1393 $$->push_back(std::make_pair(new PATypeHolder(Type::VoidTy), (char*)0));
1399 FunctionHeaderH : TypesV Name '(' ArgList ')' {
1401 std::string FunctionName($2);
1403 if (!(*$1)->isFirstClassType() && *$1 != Type::VoidTy)
1404 ThrowException("LLVM functions cannot return aggregate types!");
1406 std::vector<const Type*> ParamTypeList;
1407 if ($4) { // If there are arguments...
1408 for (std::vector<std::pair<PATypeHolder*,char*> >::iterator I = $4->begin();
1409 I != $4->end(); ++I)
1410 ParamTypeList.push_back(I->first->get());
1413 bool isVarArg = ParamTypeList.size() && ParamTypeList.back() == Type::VoidTy;
1414 if (isVarArg) ParamTypeList.pop_back();
1416 const FunctionType *FT = FunctionType::get(*$1, ParamTypeList, isVarArg);
1417 const PointerType *PFT = PointerType::get(FT);
1421 // Is the function already in symtab?
1422 if ((Fn = CurModule.CurrentModule->getFunction(FunctionName, FT))) {
1423 // Yes it is. If this is the case, either we need to be a forward decl,
1424 // or it needs to be.
1425 if (!CurFun.isDeclare && !Fn->isExternal())
1426 ThrowException("Redefinition of function '" + FunctionName + "'!");
1428 // If we found a preexisting function prototype, remove it from the
1429 // module, so that we don't get spurious conflicts with global & local
1432 CurModule.CurrentModule->getFunctionList().remove(Fn);
1434 // Make sure to strip off any argument names so we can't get conflicts...
1435 for (Function::aiterator AI = Fn->abegin(), AE = Fn->aend(); AI != AE; ++AI)
1438 } else { // Not already defined?
1439 Fn = new Function(FT, GlobalValue::ExternalLinkage, FunctionName);
1440 InsertValue(Fn, CurModule.Values);
1441 CurModule.DeclareNewGlobalValue(Fn, ValID::create($2));
1443 free($2); // Free strdup'd memory!
1445 CurFun.FunctionStart(Fn);
1447 // Add all of the arguments we parsed to the function...
1448 if ($4) { // Is null if empty...
1449 if (isVarArg) { // Nuke the last entry
1450 assert($4->back().first->get() == Type::VoidTy && $4->back().second == 0&&
1451 "Not a varargs marker!");
1452 delete $4->back().first;
1453 $4->pop_back(); // Delete the last entry
1455 Function::aiterator ArgIt = Fn->abegin();
1456 for (std::vector<std::pair<PATypeHolder*, char*> >::iterator I =$4->begin();
1457 I != $4->end(); ++I, ++ArgIt) {
1458 delete I->first; // Delete the typeholder...
1460 if (setValueName(ArgIt, I->second)) // Insert arg into symtab...
1461 assert(0 && "No arg redef allowed!");
1466 delete $4; // We're now done with the argument list
1470 BEGIN : BEGINTOK | '{'; // Allow BEGIN or '{' to start a function
1472 FunctionHeader : OptLinkage FunctionHeaderH BEGIN {
1473 $$ = CurFun.CurrentFunction;
1475 // Make sure that we keep track of the linkage type even if there was a
1476 // previous "declare".
1479 // Resolve circular types before we parse the body of the function.
1480 ResolveTypes(CurFun.LateResolveTypes);
1483 END : ENDTOK | '}'; // Allow end of '}' to end a function
1485 Function : BasicBlockList END {
1489 FunctionProto : DECLARE { CurFun.isDeclare = true; } FunctionHeaderH {
1490 $$ = CurFun.CurrentFunction;
1491 assert($$->getParent() == 0 && "Function already in module!");
1492 CurModule.CurrentModule->getFunctionList().push_back($$);
1493 CurFun.FunctionDone();
1496 //===----------------------------------------------------------------------===//
1497 // Rules to match Basic Blocks
1498 //===----------------------------------------------------------------------===//
1500 ConstValueRef : ESINT64VAL { // A reference to a direct constant
1501 $$ = ValID::create($1);
1504 $$ = ValID::create($1);
1506 | FPVAL { // Perhaps it's an FP constant?
1507 $$ = ValID::create($1);
1510 $$ = ValID::create(ConstantBool::True);
1513 $$ = ValID::create(ConstantBool::False);
1516 $$ = ValID::createNull();
1519 $$ = ValID::create($1);
1522 // SymbolicValueRef - Reference to one of two ways of symbolically refering to
1525 SymbolicValueRef : INTVAL { // Is it an integer reference...?
1526 $$ = ValID::create($1);
1528 | Name { // Is it a named reference...?
1529 $$ = ValID::create($1);
1532 // ValueRef - A reference to a definition... either constant or symbolic
1533 ValueRef : SymbolicValueRef | ConstValueRef;
1536 // ResolvedVal - a <type> <value> pair. This is used only in cases where the
1537 // type immediately preceeds the value reference, and allows complex constant
1538 // pool references (for things like: 'ret [2 x int] [ int 12, int 42]')
1539 ResolvedVal : Types ValueRef {
1540 $$ = getVal(*$1, $2); delete $1;
1543 BasicBlockList : BasicBlockList BasicBlock {
1544 ($$ = $1)->getBasicBlockList().push_back($2);
1546 | FunctionHeader BasicBlock { // Do not allow functions with 0 basic blocks
1547 ($$ = $1)->getBasicBlockList().push_back($2);
1551 // Basic blocks are terminated by branching instructions:
1552 // br, br/cc, switch, ret
1554 BasicBlock : InstructionList OptAssign BBTerminatorInst {
1555 if (setValueName($3, $2)) { assert(0 && "No redefn allowed!"); }
1558 $1->getInstList().push_back($3);
1562 | LABELSTR InstructionList OptAssign BBTerminatorInst {
1563 if (setValueName($4, $3)) { assert(0 && "No redefn allowed!"); }
1566 $2->getInstList().push_back($4);
1567 if (setValueName($2, $1)) { assert(0 && "No label redef allowed!"); }
1573 InstructionList : InstructionList Inst {
1574 $1->getInstList().push_back($2);
1578 $$ = CurBB = new BasicBlock();
1581 BBTerminatorInst : RET ResolvedVal { // Return with a result...
1582 $$ = new ReturnInst($2);
1584 | RET VOID { // Return with no result...
1585 $$ = new ReturnInst();
1587 | BR LABEL ValueRef { // Unconditional Branch...
1588 $$ = new BranchInst(cast<BasicBlock>(getVal(Type::LabelTy, $3)));
1589 } // Conditional Branch...
1590 | BR BOOL ValueRef ',' LABEL ValueRef ',' LABEL ValueRef {
1591 $$ = new BranchInst(cast<BasicBlock>(getVal(Type::LabelTy, $6)),
1592 cast<BasicBlock>(getVal(Type::LabelTy, $9)),
1593 getVal(Type::BoolTy, $3));
1595 | SWITCH IntType ValueRef ',' LABEL ValueRef '[' JumpTable ']' {
1596 SwitchInst *S = new SwitchInst(getVal($2, $3),
1597 cast<BasicBlock>(getVal(Type::LabelTy, $6)));
1600 std::vector<std::pair<Constant*,BasicBlock*> >::iterator I = $8->begin(),
1603 S->addCase(I->first, I->second);
1605 | SWITCH IntType ValueRef ',' LABEL ValueRef '[' ']' {
1606 SwitchInst *S = new SwitchInst(getVal($2, $3),
1607 cast<BasicBlock>(getVal(Type::LabelTy, $6)));
1610 | INVOKE TypesV ValueRef '(' ValueRefListE ')' TO ResolvedVal
1611 EXCEPT ResolvedVal {
1612 const PointerType *PFTy;
1613 const FunctionType *Ty;
1615 if (!(PFTy = dyn_cast<PointerType>($2->get())) ||
1616 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) {
1617 // Pull out the types of all of the arguments...
1618 std::vector<const Type*> ParamTypes;
1620 for (std::vector<Value*>::iterator I = $5->begin(), E = $5->end();
1622 ParamTypes.push_back((*I)->getType());
1625 bool isVarArg = ParamTypes.size() && ParamTypes.back() == Type::VoidTy;
1626 if (isVarArg) ParamTypes.pop_back();
1628 Ty = FunctionType::get($2->get(), ParamTypes, isVarArg);
1629 PFTy = PointerType::get(Ty);
1633 Value *V = getVal(PFTy, $3); // Get the function we're calling...
1635 BasicBlock *Normal = dyn_cast<BasicBlock>($8);
1636 BasicBlock *Except = dyn_cast<BasicBlock>($10);
1638 if (Normal == 0 || Except == 0)
1639 ThrowException("Invoke instruction without label destinations!");
1641 // Create the call node...
1642 if (!$5) { // Has no arguments?
1643 $$ = new InvokeInst(V, Normal, Except, std::vector<Value*>());
1644 } else { // Has arguments?
1645 // Loop through FunctionType's arguments and ensure they are specified
1648 FunctionType::ParamTypes::const_iterator I = Ty->getParamTypes().begin();
1649 FunctionType::ParamTypes::const_iterator E = Ty->getParamTypes().end();
1650 std::vector<Value*>::iterator ArgI = $5->begin(), ArgE = $5->end();
1652 for (; ArgI != ArgE && I != E; ++ArgI, ++I)
1653 if ((*ArgI)->getType() != *I)
1654 ThrowException("Parameter " +(*ArgI)->getName()+ " is not of type '" +
1655 (*I)->getDescription() + "'!");
1657 if (I != E || (ArgI != ArgE && !Ty->isVarArg()))
1658 ThrowException("Invalid number of parameters detected!");
1660 $$ = new InvokeInst(V, Normal, Except, *$5);
1665 $$ = new UnwindInst();
1670 JumpTable : JumpTable IntType ConstValueRef ',' LABEL ValueRef {
1672 Constant *V = cast<Constant>(getValNonImprovising($2, $3));
1674 ThrowException("May only switch on a constant pool value!");
1676 $$->push_back(std::make_pair(V, cast<BasicBlock>(getVal($5, $6))));
1678 | IntType ConstValueRef ',' LABEL ValueRef {
1679 $$ = new std::vector<std::pair<Constant*, BasicBlock*> >();
1680 Constant *V = cast<Constant>(getValNonImprovising($1, $2));
1683 ThrowException("May only switch on a constant pool value!");
1685 $$->push_back(std::make_pair(V, cast<BasicBlock>(getVal($4, $5))));
1688 Inst : OptAssign InstVal {
1689 // Is this definition named?? if so, assign the name...
1690 if (setValueName($2, $1)) { assert(0 && "No redefin allowed!"); }
1695 PHIList : Types '[' ValueRef ',' ValueRef ']' { // Used for PHI nodes
1696 $$ = new std::list<std::pair<Value*, BasicBlock*> >();
1697 $$->push_back(std::make_pair(getVal(*$1, $3),
1698 cast<BasicBlock>(getVal(Type::LabelTy, $5))));
1701 | PHIList ',' '[' ValueRef ',' ValueRef ']' {
1703 $1->push_back(std::make_pair(getVal($1->front().first->getType(), $4),
1704 cast<BasicBlock>(getVal(Type::LabelTy, $6))));
1708 ValueRefList : ResolvedVal { // Used for call statements, and memory insts...
1709 $$ = new std::vector<Value*>();
1712 | ValueRefList ',' ResolvedVal {
1717 // ValueRefListE - Just like ValueRefList, except that it may also be empty!
1718 ValueRefListE : ValueRefList | /*empty*/ { $$ = 0; };
1720 InstVal : ArithmeticOps Types ValueRef ',' ValueRef {
1721 if (!(*$2)->isInteger() && !(*$2)->isFloatingPoint())
1722 ThrowException("Arithmetic operator requires integer or FP operands!");
1723 $$ = BinaryOperator::create($1, getVal(*$2, $3), getVal(*$2, $5));
1725 ThrowException("binary operator returned null!");
1728 | LogicalOps Types ValueRef ',' ValueRef {
1729 if (!(*$2)->isIntegral())
1730 ThrowException("Logical operator requires integral operands!");
1731 $$ = BinaryOperator::create($1, getVal(*$2, $3), getVal(*$2, $5));
1733 ThrowException("binary operator returned null!");
1736 | SetCondOps Types ValueRef ',' ValueRef {
1737 $$ = new SetCondInst($1, getVal(*$2, $3), getVal(*$2, $5));
1739 ThrowException("binary operator returned null!");
1743 std::cerr << "WARNING: Use of eliminated 'not' instruction:"
1744 << " Replacing with 'xor'.\n";
1746 Value *Ones = ConstantIntegral::getAllOnesValue($2->getType());
1748 ThrowException("Expected integral type for not instruction!");
1750 $$ = BinaryOperator::create(Instruction::Xor, $2, Ones);
1752 ThrowException("Could not create a xor instruction!");
1754 | ShiftOps ResolvedVal ',' ResolvedVal {
1755 if ($4->getType() != Type::UByteTy)
1756 ThrowException("Shift amount must be ubyte!");
1757 if (!$2->getType()->isInteger())
1758 ThrowException("Shift constant expression requires integer operand!");
1759 $$ = new ShiftInst($1, $2, $4);
1761 | CAST ResolvedVal TO Types {
1762 if (!$4->get()->isFirstClassType())
1763 ThrowException("cast instruction to a non-primitive type: '" +
1764 $4->get()->getDescription() + "'!");
1765 $$ = new CastInst($2, *$4);
1768 | VA_ARG ResolvedVal ',' Types {
1769 // FIXME: This is emulation code for an obsolete syntax. This should be
1770 // removed at some point.
1771 if (!ObsoleteVarArgs) {
1772 std::cerr << "WARNING: this file uses obsolete features. "
1773 << "Assemble and disassemble to update it.\n";
1774 ObsoleteVarArgs = true;
1777 // First, load the valist...
1778 Instruction *CurVAList = new LoadInst($2, "");
1779 CurBB->getInstList().push_back(CurVAList);
1781 // Emit the vaarg instruction.
1782 $$ = new VAArgInst(CurVAList, *$4);
1784 // Now we must advance the pointer and update it in memory.
1785 Instruction *TheVANext = new VANextInst(CurVAList, *$4);
1786 CurBB->getInstList().push_back(TheVANext);
1788 CurBB->getInstList().push_back(new StoreInst(TheVANext, $2));
1791 | VAARG ResolvedVal ',' Types {
1792 $$ = new VAArgInst($2, *$4);
1795 | VANEXT ResolvedVal ',' Types {
1796 $$ = new VANextInst($2, *$4);
1800 const Type *Ty = $2->front().first->getType();
1801 if (!Ty->isFirstClassType())
1802 ThrowException("PHI node operands must be of first class type!");
1803 $$ = new PHINode(Ty);
1804 $$->op_reserve($2->size()*2);
1805 while ($2->begin() != $2->end()) {
1806 if ($2->front().first->getType() != Ty)
1807 ThrowException("All elements of a PHI node must be of the same type!");
1808 cast<PHINode>($$)->addIncoming($2->front().first, $2->front().second);
1811 delete $2; // Free the list...
1813 | CALL TypesV ValueRef '(' ValueRefListE ')' {
1814 const PointerType *PFTy;
1815 const FunctionType *Ty;
1817 if (!(PFTy = dyn_cast<PointerType>($2->get())) ||
1818 !(Ty = dyn_cast<FunctionType>(PFTy->getElementType()))) {
1819 // Pull out the types of all of the arguments...
1820 std::vector<const Type*> ParamTypes;
1822 for (std::vector<Value*>::iterator I = $5->begin(), E = $5->end();
1824 ParamTypes.push_back((*I)->getType());
1827 bool isVarArg = ParamTypes.size() && ParamTypes.back() == Type::VoidTy;
1828 if (isVarArg) ParamTypes.pop_back();
1830 Ty = FunctionType::get($2->get(), ParamTypes, isVarArg);
1831 PFTy = PointerType::get(Ty);
1835 Value *V = getVal(PFTy, $3); // Get the function we're calling...
1837 // Create the call node...
1838 if (!$5) { // Has no arguments?
1839 // Make sure no arguments is a good thing!
1840 if (Ty->getNumParams() != 0)
1841 ThrowException("No arguments passed to a function that "
1842 "expects arguments!");
1844 $$ = new CallInst(V, std::vector<Value*>());
1845 } else { // Has arguments?
1846 // Loop through FunctionType's arguments and ensure they are specified
1849 FunctionType::ParamTypes::const_iterator I = Ty->getParamTypes().begin();
1850 FunctionType::ParamTypes::const_iterator E = Ty->getParamTypes().end();
1851 std::vector<Value*>::iterator ArgI = $5->begin(), ArgE = $5->end();
1853 for (; ArgI != ArgE && I != E; ++ArgI, ++I)
1854 if ((*ArgI)->getType() != *I)
1855 ThrowException("Parameter " +(*ArgI)->getName()+ " is not of type '" +
1856 (*I)->getDescription() + "'!");
1858 if (I != E || (ArgI != ArgE && !Ty->isVarArg()))
1859 ThrowException("Invalid number of parameters detected!");
1861 $$ = new CallInst(V, *$5);
1870 // IndexList - List of indices for GEP based instructions...
1871 IndexList : ',' ValueRefList {
1874 $$ = new std::vector<Value*>();
1877 OptVolatile : VOLATILE {
1885 MemoryInst : MALLOC Types {
1886 $$ = new MallocInst(*$2);
1889 | MALLOC Types ',' UINT ValueRef {
1890 $$ = new MallocInst(*$2, getVal($4, $5));
1894 $$ = new AllocaInst(*$2);
1897 | ALLOCA Types ',' UINT ValueRef {
1898 $$ = new AllocaInst(*$2, getVal($4, $5));
1901 | FREE ResolvedVal {
1902 if (!isa<PointerType>($2->getType()))
1903 ThrowException("Trying to free nonpointer type " +
1904 $2->getType()->getDescription() + "!");
1905 $$ = new FreeInst($2);
1908 | OptVolatile LOAD Types ValueRef {
1909 if (!isa<PointerType>($3->get()))
1910 ThrowException("Can't load from nonpointer type: " +
1911 (*$3)->getDescription());
1912 $$ = new LoadInst(getVal(*$3, $4), "", $1);
1915 | OptVolatile STORE ResolvedVal ',' Types ValueRef {
1916 const PointerType *PT = dyn_cast<PointerType>($5->get());
1918 ThrowException("Can't store to a nonpointer type: " +
1919 (*$5)->getDescription());
1920 const Type *ElTy = PT->getElementType();
1921 if (ElTy != $3->getType())
1922 ThrowException("Can't store '" + $3->getType()->getDescription() +
1923 "' into space of type '" + ElTy->getDescription() + "'!");
1925 $$ = new StoreInst($3, getVal(*$5, $6), $1);
1928 | GETELEMENTPTR Types ValueRef IndexList {
1929 if (!isa<PointerType>($2->get()))
1930 ThrowException("getelementptr insn requires pointer operand!");
1931 if (!GetElementPtrInst::getIndexedType(*$2, *$4, true))
1932 ThrowException("Can't get element ptr '" + (*$2)->getDescription()+ "'!");
1933 $$ = new GetElementPtrInst(getVal(*$2, $3), *$4);
1934 delete $2; delete $4;
1939 int yyerror(const char *ErrorMsg) {
1941 = std::string((CurFilename == "-") ? std::string("<stdin>") : CurFilename)
1942 + ":" + utostr((unsigned) llvmAsmlineno) + ": ";
1943 std::string errMsg = std::string(ErrorMsg) + "\n" + where + " while reading ";
1944 if (yychar == YYEMPTY)
1945 errMsg += "end-of-file.";
1947 errMsg += "token: '" + std::string(llvmAsmtext, llvmAsmleng) + "'";
1948 ThrowException(errMsg);