1 //===-- llvm/DerivedTypes.h - Classes for handling data types ----*- C++ -*--=//
3 // This file contains the declarations of classes that represent "derived
4 // types". These are things like "arrays of x" or "structure of x, y, z" or
5 // "method returning x taking (y,z) as parameters", etc...
7 // The implementations of these classes live in the Type.cpp file.
9 //===----------------------------------------------------------------------===//
11 #ifndef LLVM_DERIVED_TYPES_H
12 #define LLVM_DERIVED_TYPES_H
14 #include "llvm/Type.h"
16 class DerivedType : public Type {
17 // AbstractTypeUsers - Implement a list of the users that need to be notified
18 // if I am a type, and I get resolved into a more concrete type.
20 ///// FIXME: kill mutable nonsense when Type's are not const
21 mutable std::vector<AbstractTypeUser *> AbstractTypeUsers;
23 char isRefining; // Used for recursive types
26 inline DerivedType(PrimitiveID id) : Type("", id) {
30 // typeIsRefined - Notify AbstractTypeUsers of this type that the current type
31 // has been refined a bit. The pointer is still valid and still should be
32 // used, but the subtypes have changed.
36 // setDerivedTypeProperties - Based on the subtypes, set the name of this
37 // type so that it is printed nicely by the type printer. Also calculate
38 // whether this type is abstract or not. Used by the constructor and when
39 // the type is refined.
41 void setDerivedTypeProperties();
45 //===--------------------------------------------------------------------===//
46 // Abstract Type handling methods - These types have special lifetimes, which
47 // are managed by (add|remove)AbstractTypeUser. See comments in
48 // AbstractTypeUser.h for more information.
50 // addAbstractTypeUser - Notify an abstract type that there is a new user of
51 // it. This function is called primarily by the PATypeHandle class.
53 void addAbstractTypeUser(AbstractTypeUser *U) const {
54 assert(isAbstract() && "addAbstractTypeUser: Current type not abstract!");
56 cerr << " addAbstractTypeUser[" << (void*)this << ", " << getDescription()
57 << "][" << AbstractTypeUsers.size() << "] User = " << U << endl;
59 AbstractTypeUsers.push_back(U);
62 // removeAbstractTypeUser - Notify an abstract type that a user of the class
63 // no longer has a handle to the type. This function is called primarily by
64 // the PATypeHandle class. When there are no users of the abstract type, it
65 // is anihilated, because there is no way to get a reference to it ever again.
67 void removeAbstractTypeUser(AbstractTypeUser *U) const;
69 // getNumAbstractTypeUsers - Return the number of users registered to the type
70 inline unsigned getNumAbstractTypeUsers() const {
71 assert(isAbstract() && "getNumAbstractTypeUsers: Type not abstract!");
72 return AbstractTypeUsers.size();
75 // refineAbstractTypeTo - This function is used to when it is discovered that
76 // the 'this' abstract type is actually equivalent to the NewType specified.
77 // This causes all users of 'this' to switch to reference the more concrete
78 // type NewType and for 'this' to be deleted.
80 void refineAbstractTypeTo(const Type *NewType);
82 // Methods for support type inquiry through isa, cast, and dyn_cast:
83 static inline bool classof(const DerivedType *T) { return true; }
84 static inline bool classof(const Type *T) {
85 return T->isDerivedType();
87 static inline bool classof(const Value *V) {
88 return isa<Type>(V) && classof(cast<const Type>(V));
95 class FunctionType : public DerivedType {
97 typedef std::vector<PATypeHandle<Type> > ParamTypes;
99 PATypeHandle<Type> ResultType;
103 FunctionType(const FunctionType &); // Do not implement
104 const FunctionType &operator=(const FunctionType &); // Do not implement
106 // This should really be private, but it squelches a bogus warning
107 // from GCC to make them protected: warning: `class FunctionType' only
108 // defines private constructors and has no friends
110 // Private ctor - Only can be created by a static member...
111 FunctionType(const Type *Result, const std::vector<const Type*> &Params,
116 inline bool isVarArg() const { return isVarArgs; }
117 inline const Type *getReturnType() const { return ResultType; }
118 inline const ParamTypes &getParamTypes() const { return ParamTys; }
120 // Parameter type accessors...
121 const Type *getParamType(unsigned i) const { return ParamTys[i]; }
123 // getNumParams - Return the number of fixed parameters this function type
124 // requires. This does not consider varargs.
126 unsigned getNumParams() const { return ParamTys.size(); }
129 virtual const Type *getContainedType(unsigned i) const {
130 return i == 0 ? ResultType :
131 (i <= ParamTys.size() ? ParamTys[i-1].get() : 0);
133 virtual unsigned getNumContainedTypes() const { return ParamTys.size()+1; }
135 // refineAbstractType - Called when a contained type is found to be more
136 // concrete - this could potentially change us from an abstract type to a
139 virtual void refineAbstractType(const DerivedType *OldTy, const Type *NewTy);
141 static FunctionType *get(const Type *Result,
142 const std::vector<const Type*> &Params,
146 // Methods for support type inquiry through isa, cast, and dyn_cast:
147 static inline bool classof(const FunctionType *T) { return true; }
148 static inline bool classof(const Type *T) {
149 return T->getPrimitiveID() == FunctionTyID;
151 static inline bool classof(const Value *V) {
152 return isa<Type>(V) && classof(cast<const Type>(V));
157 // CompositeType - Common super class of ArrayType, StructType, and PointerType
159 class CompositeType : public DerivedType {
161 inline CompositeType(PrimitiveID id) : DerivedType(id) { }
165 // getTypeAtIndex - Given an index value into the type, return the type of the
168 virtual const Type *getTypeAtIndex(const Value *V) const = 0;
169 virtual bool indexValid(const Value *V) const = 0;
171 // getIndexType - Return the type required of indices for this composite.
172 // For structures, this is ubyte, for arrays, this is uint
174 virtual const Type *getIndexType() const = 0;
177 // Methods for support type inquiry through isa, cast, and dyn_cast:
178 static inline bool classof(const CompositeType *T) { return true; }
179 static inline bool classof(const Type *T) {
180 return T->getPrimitiveID() == ArrayTyID ||
181 T->getPrimitiveID() == StructTyID ||
182 T->getPrimitiveID() == PointerTyID;
184 static inline bool classof(const Value *V) {
185 return isa<Type>(V) && classof(cast<const Type>(V));
190 class StructType : public CompositeType {
192 typedef std::vector<PATypeHandle<Type> > ElementTypes;
195 ElementTypes ETypes; // Element types of struct
197 StructType(const StructType &); // Do not implement
198 const StructType &operator=(const StructType &); // Do not implement
201 // This should really be private, but it squelches a bogus warning
202 // from GCC to make them protected: warning: `class StructType' only
203 // defines private constructors and has no friends
205 // Private ctor - Only can be created by a static member...
206 StructType(const std::vector<const Type*> &Types);
209 inline const ElementTypes &getElementTypes() const { return ETypes; }
211 virtual const Type *getContainedType(unsigned i) const {
212 return i < ETypes.size() ? ETypes[i].get() : 0;
214 virtual unsigned getNumContainedTypes() const { return ETypes.size(); }
216 // getTypeAtIndex - Given an index value into the type, return the type of the
217 // element. For a structure type, this must be a constant value...
219 virtual const Type *getTypeAtIndex(const Value *V) const ;
220 virtual bool indexValid(const Value *V) const;
222 // getIndexType - Return the type required of indices for this composite.
223 // For structures, this is ubyte, for arrays, this is uint
225 virtual const Type *getIndexType() const { return Type::UByteTy; }
227 // refineAbstractType - Called when a contained type is found to be more
228 // concrete - this could potentially change us from an abstract type to a
231 virtual void refineAbstractType(const DerivedType *OldTy, const Type *NewTy);
233 static StructType *get(const std::vector<const Type*> &Params);
235 // Methods for support type inquiry through isa, cast, and dyn_cast:
236 static inline bool classof(const StructType *T) { return true; }
237 static inline bool classof(const Type *T) {
238 return T->getPrimitiveID() == StructTyID;
240 static inline bool classof(const Value *V) {
241 return isa<Type>(V) && classof(cast<const Type>(V));
246 // SequentialType - This is the superclass of the array and pointer type
247 // classes. Both of these represent "arrays" in memory. The array type
248 // represents a specifically sized array, pointer types are unsized/unknown size
249 // arrays. SequentialType holds the common features of both, which stem from
250 // the fact that both lay their components out in memory identically.
252 class SequentialType : public CompositeType {
253 SequentialType(const SequentialType &); // Do not implement!
254 const SequentialType &operator=(const SequentialType &); // Do not implement!
256 PATypeHandle<Type> ElementType;
258 SequentialType(PrimitiveID TID, const Type *ElType)
259 : CompositeType(TID), ElementType(PATypeHandle<Type>(ElType, this)) {
263 inline const Type *getElementType() const { return ElementType; }
265 virtual const Type *getContainedType(unsigned i) const {
266 return i == 0 ? ElementType.get() : 0;
268 virtual unsigned getNumContainedTypes() const { return 1; }
270 // getTypeAtIndex - Given an index value into the type, return the type of the
271 // element. For sequential types, there is only one subtype...
273 virtual const Type *getTypeAtIndex(const Value *V) const {
274 return ElementType.get();
276 virtual bool indexValid(const Value *V) const {
277 return V->getType() == Type::UIntTy; // Must be an unsigned int index
280 // getIndexType() - Return the type required of indices for this composite.
281 // For structures, this is ubyte, for arrays, this is uint
283 virtual const Type *getIndexType() const { return Type::UIntTy; }
285 // Methods for support type inquiry through isa, cast, and dyn_cast:
286 static inline bool classof(const SequentialType *T) { return true; }
287 static inline bool classof(const Type *T) {
288 return T->getPrimitiveID() == ArrayTyID ||
289 T->getPrimitiveID() == PointerTyID;
291 static inline bool classof(const Value *V) {
292 return isa<Type>(V) && classof(cast<const Type>(V));
297 class ArrayType : public SequentialType {
298 unsigned NumElements;
300 ArrayType(const ArrayType &); // Do not implement
301 const ArrayType &operator=(const ArrayType &); // Do not implement
303 // This should really be private, but it squelches a bogus warning
304 // from GCC to make them protected: warning: `class ArrayType' only
305 // defines private constructors and has no friends
308 // Private ctor - Only can be created by a static member...
309 ArrayType(const Type *ElType, unsigned NumEl);
311 inline unsigned getNumElements() const { return NumElements; }
313 // refineAbstractType - Called when a contained type is found to be more
314 // concrete - this could potentially change us from an abstract type to a
317 virtual void refineAbstractType(const DerivedType *OldTy, const Type *NewTy);
319 static ArrayType *get(const Type *ElementType, unsigned NumElements);
321 // Methods for support type inquiry through isa, cast, and dyn_cast:
322 static inline bool classof(const ArrayType *T) { return true; }
323 static inline bool classof(const Type *T) {
324 return T->getPrimitiveID() == ArrayTyID;
326 static inline bool classof(const Value *V) {
327 return isa<Type>(V) && classof(cast<const Type>(V));
333 class PointerType : public SequentialType {
334 PointerType(const PointerType &); // Do not implement
335 const PointerType &operator=(const PointerType &); // Do not implement
337 // This should really be private, but it squelches a bogus warning
338 // from GCC to make them protected: warning: `class PointerType' only
339 // defines private constructors and has no friends
342 // Private ctor - Only can be created by a static member...
343 PointerType(const Type *ElType);
345 // PointerType::get - Named constructor for pointer types...
346 static PointerType *get(const Type *ElementType);
348 // refineAbstractType - Called when a contained type is found to be more
349 // concrete - this could potentially change us from an abstract type to a
352 virtual void refineAbstractType(const DerivedType *OldTy, const Type *NewTy);
354 // Methods for support type inquiry through isa, cast, and dyn_cast:
355 static inline bool classof(const PointerType *T) { return true; }
356 static inline bool classof(const Type *T) {
357 return T->getPrimitiveID() == PointerTyID;
359 static inline bool classof(const Value *V) {
360 return isa<Type>(V) && classof(cast<const Type>(V));
365 class OpaqueType : public DerivedType {
367 OpaqueType(const OpaqueType &); // Do not implement
368 const OpaqueType &operator=(const OpaqueType &); // Do not implement
370 // This should really be private, but it squelches a bogus warning
371 // from GCC to make them protected: warning: `class OpaqueType' only
372 // defines private constructors and has no friends
374 // Private ctor - Only can be created by a static member...
379 // get - Static factory method for the OpaqueType class...
380 static OpaqueType *get() {
381 return new OpaqueType(); // All opaque types are distinct
384 // Methods for support type inquiry through isa, cast, and dyn_cast:
385 static inline bool classof(const OpaqueType *T) { return true; }
386 static inline bool classof(const Type *T) {
387 return T->getPrimitiveID() == OpaqueTyID;
389 static inline bool classof(const Value *V) {
390 return isa<Type>(V) && classof(cast<const Type>(V));
395 // Define some inline methods for the AbstractTypeUser.h:PATypeHandle class.
396 // These are defined here because they MUST be inlined, yet are dependant on
397 // the definition of the Type class. Of course Type derives from Value, which
398 // contains an AbstractTypeUser instance, so there is no good way to factor out
399 // the code. Hence this bit of uglyness.
401 template <class TypeSubClass> void PATypeHandle<TypeSubClass>::addUser() {
402 assert(Ty && "Type Handle has a null type!");
403 if (Ty->isAbstract())
404 cast<DerivedType>(Ty)->addAbstractTypeUser(User);
406 template <class TypeSubClass> void PATypeHandle<TypeSubClass>::removeUser() {
407 if (Ty->isAbstract())
408 cast<DerivedType>(Ty)->removeAbstractTypeUser(User);
411 template <class TypeSubClass>
412 void PATypeHandle<TypeSubClass>::removeUserFromConcrete() {
413 if (!Ty->isAbstract())
414 cast<DerivedType>(Ty)->removeAbstractTypeUser(User);