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PointerType and ArrayType now subclass Sequential type, which contains addressability logic for indexing. Unsized arrays have been removed.

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llvm-svn: 1454
This commit is contained in:
Chris Lattner 2001-12-14 16:20:21 +00:00
parent 58691e18af
commit b2e8f44166
1 changed files with 94 additions and 78 deletions
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172
include/llvm/DerivedTypes.h
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@ -23,7 +23,7 @@ class DerivedType : public Type {
char isRefining; // Used for recursive types
protected:
inline DerivedType(const string &Name, PrimitiveID id) : Type(Name, id) {
inline DerivedType(PrimitiveID id) : Type("", id) {
isRefining = false;
}
@ -145,12 +145,11 @@ public:
};
// CompositeType - Common super class of ArrayType and StructType...
// CompositeType - Common super class of ArrayType, StructType, and PointerType
//
class CompositeType : public DerivedType {
protected:
inline CompositeType(const string &Name, PrimitiveID id)
: DerivedType(Name, id) { }
inline CompositeType(PrimitiveID id) : DerivedType(id) { }
public:
@ -170,69 +169,8 @@ public:
static inline bool classof(const CompositeType *T) { return true; }
static inline bool classof(const Type *T) {
return T->getPrimitiveID() == ArrayTyID ||
T->getPrimitiveID() == StructTyID;
}
static inline bool classof(const Value *V) {
return isa<Type>(V) && classof(cast<const Type>(V));
}
};
class ArrayType : public CompositeType {
private:
PATypeHandle<Type> ElementType;
int NumElements; // >= 0 for sized array, -1 for unbounded/unknown array
ArrayType(const ArrayType &); // Do not implement
const ArrayType &operator=(const ArrayType &); // Do not implement
protected:
// This should really be private, but it squelches a bogus warning
// from GCC to make them protected: warning: `class ArrayType' only
// defines private constructors and has no friends
// Private ctor - Only can be created by a static member...
ArrayType(const Type *ElType, int NumEl);
public:
inline const Type *getElementType() const { return ElementType; }
inline int getNumElements() const { return NumElements; }
inline bool isSized() const { return NumElements >= 0; }
inline bool isUnsized() const { return NumElements == -1; }
virtual const Type *getContainedType(unsigned i) const {
return i == 0 ? ElementType.get() : 0;
}
virtual unsigned getNumContainedTypes() const { return 1; }
// getTypeAtIndex - Given an index value into the type, return the type of the
// element. For an arraytype, there is only one subtype...
//
virtual const Type *getTypeAtIndex(const Value *V) const {
return ElementType.get();
}
virtual bool indexValid(const Value *V) const {
return V->getType() == Type::UIntTy; // Must be an unsigned int index
}
// getIndexType - Return the type required of indices for this composite.
// For structures, this is ubyte, for arrays, this is uint
//
virtual const Type *getIndexType() const { return Type::UIntTy; }
// refineAbstractType - Called when a contained type is found to be more
// concrete - this could potentially change us from an abstract type to a
// concrete type.
//
virtual void refineAbstractType(const DerivedType *OldTy, const Type *NewTy);
static ArrayType *get(const Type *ElementType, int NumElements = -1);
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ArrayType *T) { return true; }
static inline bool classof(const Type *T) {
return T->getPrimitiveID() == ArrayTyID;
T->getPrimitiveID() == StructTyID ||
T->getPrimitiveID() == PointerTyID;
}
static inline bool classof(const Value *V) {
return isa<Type>(V) && classof(cast<const Type>(V));
@ -296,10 +234,94 @@ public:
};
class PointerType : public DerivedType {
private:
PATypeHandle<Type> ValueType;
// SequentialType - This is the superclass of the array and pointer type
// classes. Both of these represent "arrays" in memory. The array type
// represents a specifically sized array, pointer types are unsized/unknown size
// arrays. SequentialType holds the common features of both, which stem from
// the fact that both lay their components out in memory identically.
//
class SequentialType : public CompositeType {
SequentialType(const SequentialType &); // Do not implement!
const SequentialType &operator=(const SequentialType &); // Do not implement!
protected:
PATypeHandle<Type> ElementType;
SequentialType(PrimitiveID TID, const Type *ElType)
: CompositeType(TID), ElementType(PATypeHandle<Type>(ElType, this)) {
}
public:
inline const Type *getElementType() const { return ElementType; }
virtual const Type *getContainedType(unsigned i) const {
return i == 0 ? ElementType.get() : 0;
}
virtual unsigned getNumContainedTypes() const { return 1; }
// getTypeAtIndex - Given an index value into the type, return the type of the
// element. For sequential types, there is only one subtype...
//
virtual const Type *getTypeAtIndex(const Value *V) const {
return ElementType.get();
}
virtual bool indexValid(const Value *V) const {
return V->getType() == Type::UIntTy; // Must be an unsigned int index
}
// getIndexType() - Return the type required of indices for this composite.
// For structures, this is ubyte, for arrays, this is uint
//
virtual const Type *getIndexType() const { return Type::UIntTy; }
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const SequentialType *T) { return true; }
static inline bool classof(const Type *T) {
return T->getPrimitiveID() == ArrayTyID ||
T->getPrimitiveID() == PointerTyID;
}
static inline bool classof(const Value *V) {
return isa<Type>(V) && classof(cast<const Type>(V));
}
};
class ArrayType : public SequentialType {
unsigned NumElements;
ArrayType(const ArrayType &); // Do not implement
const ArrayType &operator=(const ArrayType &); // Do not implement
protected:
// This should really be private, but it squelches a bogus warning
// from GCC to make them protected: warning: `class ArrayType' only
// defines private constructors and has no friends
// Private ctor - Only can be created by a static member...
ArrayType(const Type *ElType, unsigned NumEl);
public:
inline unsigned getNumElements() const { return NumElements; }
// refineAbstractType - Called when a contained type is found to be more
// concrete - this could potentially change us from an abstract type to a
// concrete type.
//
virtual void refineAbstractType(const DerivedType *OldTy, const Type *NewTy);
static ArrayType *get(const Type *ElementType, unsigned NumElements);
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ArrayType *T) { return true; }
static inline bool classof(const Type *T) {
return T->getPrimitiveID() == ArrayTyID;
}
static inline bool classof(const Value *V) {
return isa<Type>(V) && classof(cast<const Type>(V));
}
};
class PointerType : public SequentialType {
PointerType(const PointerType &); // Do not implement
const PointerType &operator=(const PointerType &); // Do not implement
protected:
@ -311,14 +333,7 @@ protected:
// Private ctor - Only can be created by a static member...
PointerType(const Type *ElType);
public:
inline const Type *getElementType() const { return ValueType; }
virtual const Type *getContainedType(unsigned i) const {
return i == 0 ? ValueType.get() : 0;
}
virtual unsigned getNumContainedTypes() const { return 1; }
// PointerType::get - Named constructor for pointer types...
static PointerType *get(const Type *ElementType);
// refineAbstractType - Called when a contained type is found to be more
@ -375,6 +390,7 @@ public:
// the code. Hence this bit of uglyness.
//
template <class TypeSubClass> void PATypeHandle<TypeSubClass>::addUser() {
assert(Ty && "Type Handle has a null type!");
if (Ty->isAbstract())
cast<DerivedType>(Ty)->addAbstractTypeUser(User);
}