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Sprinkle liberally with comments, saute with doxygen until readable.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11293 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Misha Brukman 2004-02-10 21:49:59 +00:00
parent 5e871dadae
commit acddebd5bb
1 changed files with 77 additions and 61 deletions
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138
include/llvm/DerivedTypes.h
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@ -53,9 +53,10 @@ protected:
///
void notifyUsesThatTypeBecameConcrete();
// dropAllTypeUses - When this (abstract) type is resolved to be equal to
// another (more concrete) type, we must eliminate all references to other
// types, to avoid some circular reference problems.
/// dropAllTypeUses - When this (abstract) type is resolved to be equal to
/// another (more concrete) type, we must eliminate all references to other
/// types, to avoid some circular reference problems.
///
void dropAllTypeUses();
public:
@ -65,27 +66,27 @@ public:
// are managed by (add|remove)AbstractTypeUser. See comments in
// AbstractTypeUser.h for more information.
// addAbstractTypeUser - Notify an abstract type that there is a new user of
// it. This function is called primarily by the PATypeHandle class.
//
/// addAbstractTypeUser - Notify an abstract type that there is a new user of
/// it. This function is called primarily by the PATypeHandle class.
///
void addAbstractTypeUser(AbstractTypeUser *U) const {
assert(isAbstract() && "addAbstractTypeUser: Current type not abstract!");
AbstractTypeUsers.push_back(U);
}
// removeAbstractTypeUser - Notify an abstract type that a user of the class
// no longer has a handle to the type. This function is called primarily by
// the PATypeHandle class. When there are no users of the abstract type, it
// is annihilated, because there is no way to get a reference to it ever
// again.
//
/// removeAbstractTypeUser - Notify an abstract type that a user of the class
/// no longer has a handle to the type. This function is called primarily by
/// the PATypeHandle class. When there are no users of the abstract type, it
/// is annihilated, because there is no way to get a reference to it ever
/// again.
///
void removeAbstractTypeUser(AbstractTypeUser *U) const;
// refineAbstractTypeTo - This function is used to when it is discovered that
// the 'this' abstract type is actually equivalent to the NewType specified.
// This causes all users of 'this' to switch to reference the more concrete
// type NewType and for 'this' to be deleted.
//
/// refineAbstractTypeTo - This function is used to when it is discovered that
/// the 'this' abstract type is actually equivalent to the NewType specified.
/// This causes all users of 'this' to switch to reference the more concrete
/// type NewType and for 'this' to be deleted.
///
void refineAbstractTypeTo(const Type *NewType);
void addRef() const {
@ -117,8 +118,8 @@ public:
};
/// FunctionType - Class to represent function types
///
class FunctionType : public DerivedType {
friend class TypeMap<FunctionValType, FunctionType>;
bool isVarArgs;
@ -126,17 +127,19 @@ class FunctionType : public DerivedType {
FunctionType(const FunctionType &); // Do not implement
const FunctionType &operator=(const FunctionType &); // Do not implement
protected:
// This should really be private, but it squelches a bogus warning
// from GCC to make them protected: warning: `class FunctionType' only
// defines private constructors and has no friends
// Private ctor - Only can be created by a static member...
/// This should really be private, but it squelches a bogus warning
/// from GCC to make them protected: warning: `class FunctionType' only
/// defines private constructors and has no friends
///
/// Private ctor - Only can be created by a static member...
///
FunctionType(const Type *Result, const std::vector<const Type*> &Params,
bool IsVarArgs);
public:
/// FunctionType::get - This static method is the primary way of constructing
/// a FunctionType
///
static FunctionType *get(const Type *Result,
const std::vector<const Type*> &Params,
bool isVarArg);
@ -151,9 +154,9 @@ public:
// Parameter type accessors...
const Type *getParamType(unsigned i) const { return ContainedTys[i+1]; }
// getNumParams - Return the number of fixed parameters this function type
// requires. This does not consider varargs.
//
/// getNumParams - Return the number of fixed parameters this function type
/// requires. This does not consider varargs.
///
unsigned getNumParams() const { return ContainedTys.size()-1; }
// Implement the AbstractTypeUser interface.
@ -171,16 +174,16 @@ public:
};
// CompositeType - Common super class of ArrayType, StructType, and PointerType
//
/// CompositeType - Common super class of ArrayType, StructType, and PointerType
///
class CompositeType : public DerivedType {
protected:
inline CompositeType(PrimitiveID id) : DerivedType(id) { }
public:
// getTypeAtIndex - Given an index value into the type, return the type of the
// element.
//
/// getTypeAtIndex - Given an index value into the type, return the type of
/// the element.
///
virtual const Type *getTypeAtIndex(const Value *V) const = 0;
virtual bool indexValid(const Value *V) const = 0;
@ -197,22 +200,26 @@ public:
};
/// StructType - Class to represent struct types
///
class StructType : public CompositeType {
friend class TypeMap<StructValType, StructType>;
StructType(const StructType &); // Do not implement
const StructType &operator=(const StructType &); // Do not implement
protected:
// This should really be private, but it squelches a bogus warning
// from GCC to make them protected: warning: `class StructType' only
// defines private constructors and has no friends
// Private ctor - Only can be created by a static member...
/// This should really be private, but it squelches a bogus warning
/// from GCC to make them protected: warning: `class StructType' only
/// defines private constructors and has no friends
///
/// Private ctor - Only can be created by a static member...
///
StructType(const std::vector<const Type*> &Types);
public:
/// StructType::get - This static method is the primary way to create a
/// StructType.
///
static StructType *get(const std::vector<const Type*> &Params);
// Iterator access to the elements
@ -227,9 +234,9 @@ public:
return ContainedTys[N];
}
// getTypeAtIndex - Given an index value into the type, return the type of the
// element. For a structure type, this must be a constant value...
//
/// getTypeAtIndex - Given an index value into the type, return the type of
/// the element. For a structure type, this must be a constant value...
///
virtual const Type *getTypeAtIndex(const Value *V) const ;
virtual bool indexValid(const Value *V) const;
@ -248,12 +255,12 @@ public:
};
// 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.
//
/// 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!
@ -266,9 +273,9 @@ protected:
public:
inline const Type *getElementType() const { return ContainedTys[0]; }
// getTypeAtIndex - Given an index value into the type, return the type of the
// element. For sequential types, there is only one subtype...
//
/// 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 ContainedTys[0];
}
@ -288,6 +295,8 @@ public:
};
/// ArrayType - Class to represent array types
///
class ArrayType : public SequentialType {
friend class TypeMap<ArrayValType, ArrayType>;
unsigned NumElements;
@ -295,16 +304,18 @@ class ArrayType : public SequentialType {
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...
/// 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:
/// ArrayType::get - This static method is the primary way to construct an
/// ArrayType
///
static ArrayType *get(const Type *ElementType, unsigned NumElements);
inline unsigned getNumElements() const { return NumElements; }
@ -324,7 +335,8 @@ public:
};
/// PointerType - Class to represent pointers
///
class PointerType : public SequentialType {
friend class TypeMap<PointerValType, PointerType>;
PointerType(const PointerType &); // Do not implement
@ -356,19 +368,22 @@ public:
};
/// OpaqueType - Class to represent abstract types
///
class OpaqueType : public DerivedType {
OpaqueType(const OpaqueType &); // DO NOT IMPLEMENT
const OpaqueType &operator=(const OpaqueType &); // DO NOT IMPLEMENT
protected:
// This should really be private, but it squelches a bogus warning
// from GCC to make them protected: warning: `class OpaqueType' only
// defines private constructors and has no friends
// Private ctor - Only can be created by a static member...
/// This should really be private, but it squelches a bogus warning
/// from GCC to make them protected: warning: `class OpaqueType' only
/// defines private constructors and has no friends
///
/// Private ctor - Only can be created by a static member...
OpaqueType();
public:
// OpaqueType::get - Static factory method for the OpaqueType class...
/// OpaqueType::get - Static factory method for the OpaqueType class...
///
static OpaqueType *get() {
return new OpaqueType(); // All opaque types are distinct
}
@ -429,6 +444,7 @@ inline void PATypeHolder::dropRef() {
/// abstract types. Before every access to the Type*, we check to see if the
/// type we are pointing to is forwarding to a new type. If so, we drop our
/// reference to the type.
///
inline const Type* PATypeHolder::get() const {
const Type *NewTy = Ty->getForwardedType();
if (!NewTy) return Ty;