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* Add support for Opaque & Abstract types.
* Remove silly enum values that are never going to be used * What used to be a types "name" is now it's "description" * Add a new iterator to type to allow users to iterate over subtypes git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@426 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
parent
46b23d92e3
commit
a797d28333
@ -10,6 +10,17 @@
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//
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// Types, once allocated, are never free'd.
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//
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// Opaque types are simple derived types with no state. There may be many
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// different Opaque type objects floating around, but two are only considered
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// identical if they are pointer equals of each other. This allows us to have
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// two opaque types that end up resolving to different concrete types later.
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//
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// Opaque types are also kinda wierd and scary and different because they have
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// to keep a list of uses of the type. When, through linking, parsing, or
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// bytecode reading, they become resolved, they need to find and update all
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// users of the unknown type, causing them to reference a new, more concrete
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// type. Opaque types are deleted when their use list dwindles to zero users.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TYPE_H
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@ -20,11 +31,12 @@
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namespace opt {
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class ConstRules;
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}
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class ConstPoolVal;
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class DerivedType;
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class MethodType;
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class ArrayType;
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class StructType;
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class PointerType;
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class StructType;
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class OpaqueType;
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class Type : public Value {
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public:
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@ -44,16 +56,15 @@ public:
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FloatTyID , DoubleTyID, // 10,11: Floating point types...
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TypeTyID, // 12 : Type definitions
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LabelTyID , LockTyID, // 13,14: Labels... mutexes...
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// TODO: Kill FillerTyID. It just makes FirstDerivedTyID = 0x10
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FillerTyID , // 15 : filler
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LabelTyID , // 13 : Labels...
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/*LockTyID , */ // 14 : mutex - TODO
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// Derived types... see DerivedTypes.h file...
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// Make sure FirstDerivedTyID stays up to date!!!
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MethodTyID , ModuleTyID, // Methods... Modules...
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ArrayTyID , PointerTyID, // Array... pointer...
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StructTyID , PackedTyID, // Structure... SIMD 'packed' format...
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StructTyID , OpaqueTyID, // Structure... Opaque type instances...
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//PackedTyID , // SIMD 'packed' format... TODO
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//...
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NumPrimitiveIDs, // Must remain as last defined ID
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@ -61,8 +72,11 @@ public:
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};
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private:
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PrimitiveID ID; // The current base type of this type...
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unsigned UID; // The unique ID number for this class
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PrimitiveID ID; // The current base type of this type...
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unsigned UID; // The unique ID number for this class
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string Desc; // The printed name of the string...
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bool Abstract; // True if type contains an OpaqueType
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bool Recursive; // True if the type is recursive
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// ConstRulesImpl - See Opt/ConstantHandling.h for more info
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mutable const opt::ConstRules *ConstRulesImpl;
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@ -70,9 +84,46 @@ private:
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protected:
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// ctor is protected, so only subclasses can create Type objects...
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Type(const string &Name, PrimitiveID id);
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public:
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virtual ~Type() {}
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// When types are refined, they update their description to be more concrete.
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//
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inline void setDescription(const string &D) { Desc = D; }
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// setName - Associate the name with this type in the symbol table, but don't
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// set the local name to be equal specified name.
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//
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virtual void setName(const string &Name, SymbolTable *ST = 0);
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// Types can become nonabstract later, if they are refined.
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//
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inline void setAbstract(bool Val) { Abstract = Val; }
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// Types can become recursive later, if they are refined.
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//
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inline void setRecursive(bool Val) { Recursive = Val; }
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public:
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//===--------------------------------------------------------------------===//
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// Property accessors for dealing with types...
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//
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// getPrimitiveID - Return the base type of the type. This will return one
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// of the PrimitiveID enum elements defined above.
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//
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inline PrimitiveID getPrimitiveID() const { return ID; }
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// getUniqueID - Returns the UID of the type. This can be thought of as a
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// small integer version of the pointer to the type class. Two types that are
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// structurally different have different UIDs. This can be used for indexing
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// types into an array.
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//
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inline unsigned getUniqueID() const { return UID; }
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// getDescription - Return the string representation of the type...
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inline const string &getDescription() const { return Desc; }
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// isSigned - Return whether a numeric type is signed.
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virtual bool isSigned() const { return 0; }
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@ -87,8 +138,38 @@ public:
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//
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virtual bool isIntegral() const { return 0; }
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inline unsigned getUniqueID() const { return UID; }
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inline PrimitiveID getPrimitiveID() const { return ID; }
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// isAbstract - True if the type is either an Opaque type, or is a derived
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// type that includes an opaque type somewhere in it.
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//
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inline bool isAbstract() const { return Abstract; }
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// isRecursive - True if the type graph contains a cycle.
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//
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inline bool isRecursive() const { return Recursive; }
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//===--------------------------------------------------------------------===//
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// Type Iteration support
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//
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class TypeIterator;
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typedef TypeIterator contype_iterator;
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inline contype_iterator contype_begin() const; // DEFINED BELOW
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inline contype_iterator contype_end() const; // DEFINED BELOW
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// getContainedType - This method is used to implement the type iterator
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// (defined a the end of the file). For derived types, this returns the types
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// 'contained' in the derived type, returning 0 when 'i' becomes invalid. This
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// allows the user to iterate over the types in a struct, for example, really
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// easily.
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//
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virtual const Type *getContainedType(unsigned i) const { return 0; }
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// getNumContainedTypes - Return the number of types in the derived type
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virtual unsigned getNumContainedTypes() const { return 0; }
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//===--------------------------------------------------------------------===//
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// Static members exported by the Type class itself. Useful for getting
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// instances of Type.
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//
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// getPrimitiveType/getUniqueIDType - Return a type based on an identifier.
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static const Type *getPrimitiveType(PrimitiveID IDNumber);
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@ -98,9 +179,11 @@ public:
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// for more info on this...
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//
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inline const opt::ConstRules *getConstRules() const { return ConstRulesImpl; }
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inline void setConstRules(const opt::ConstRules *R) const { ConstRulesImpl = R; }
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inline void setConstRules(const opt::ConstRules *R) const { ConstRulesImpl=R;}
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public: // These are the builtin types that are always available...
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//===--------------------------------------------------------------------===//
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// These are the builtin types that are always available...
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//
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static const Type *VoidTy , *BoolTy;
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static const Type *SByteTy, *UByteTy,
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*ShortTy, *UShortTy,
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@ -108,7 +191,7 @@ public: // These are the builtin types that are always available...
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*LongTy , *ULongTy;
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static const Type *FloatTy, *DoubleTy;
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static const Type *TypeTy , *LabelTy, *LockTy;
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static const Type *TypeTy , *LabelTy; //, *LockTy;
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// Here are some useful little methods to query what type derived types are
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// Note that all other types can just compare to see if this == Type::xxxTy;
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@ -117,6 +200,15 @@ public: // These are the builtin types that are always available...
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inline bool isPrimitiveType() const { return ID < FirstDerivedTyID; }
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inline bool isLabelType() const { return this == LabelTy; }
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inline const DerivedType *castDerivedType() const {
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return isDerivedType() ? (const DerivedType*)this : 0;
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}
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inline const DerivedType *castDerivedTypeAsserting() const {
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assert(isDerivedType());
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return (const DerivedType*)this;
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}
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inline const MethodType *isMethodType() const {
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return ID == MethodTyID ? (const MethodType*)this : 0;
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}
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@ -130,6 +222,45 @@ public: // These are the builtin types that are always available...
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inline const StructType *isStructType() const {
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return ID == StructTyID ? (const StructType*)this : 0;
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}
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inline const OpaqueType *isOpaqueType() const {
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return ID == OpaqueTyID ? (const OpaqueType*)this : 0;
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}
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private:
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class TypeIterator : public std::bidirectional_iterator<const Type,
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ptrdiff_t> {
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const Type * const Ty;
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unsigned Idx;
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typedef TypeIterator _Self;
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public:
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inline TypeIterator(const Type *ty, unsigned idx) : Ty(ty), Idx(idx) {}
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inline ~TypeIterator() {}
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inline bool operator==(const _Self& x) const { return Idx == x.Idx; }
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inline bool operator!=(const _Self& x) const { return !operator==(x); }
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inline pointer operator*() const { return Ty->getContainedType(Idx); }
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inline pointer operator->() const { return operator*(); }
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inline _Self& operator++() { ++Idx; return *this; } // Preincrement
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inline _Self operator++(int) { // Postincrement
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_Self tmp = *this; ++*this; return tmp;
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}
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inline _Self& operator--() { --Idx; return *this; } // Predecrement
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inline _Self operator--(int) { // Postdecrement
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_Self tmp = *this; --*this; return tmp;
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}
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};
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};
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inline Type::TypeIterator Type::contype_begin() const {
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return TypeIterator(this, 0);
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}
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inline Type::TypeIterator Type::contype_end() const {
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return TypeIterator(this, getNumContainedTypes());
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}
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#endif
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