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https://github.com/c64scene-ar/llvm-6502.git
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31750 91177308-0d34-0410-b5e6-96231b3b80d8
390 lines
14 KiB
C++
390 lines
14 KiB
C++
//===-- llvm/DerivedTypes.h - Classes for handling data types ---*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains the declarations of classes that represent "derived
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// types". These are things like "arrays of x" or "structure of x, y, z" or
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// "method returning x taking (y,z) as parameters", etc...
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//
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// The implementations of these classes live in the Type.cpp file.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_DERIVED_TYPES_H
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#define LLVM_DERIVED_TYPES_H
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#include "llvm/Type.h"
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namespace llvm {
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class Value;
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template<class ValType, class TypeClass> class TypeMap;
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class FunctionValType;
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class ArrayValType;
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class StructValType;
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class PointerValType;
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class PackedValType;
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class DerivedType : public Type {
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friend class Type;
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protected:
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DerivedType(TypeID id) : Type(id) {}
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/// notifyUsesThatTypeBecameConcrete - Notify AbstractTypeUsers of this type
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/// that the current type has transitioned from being abstract to being
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/// concrete.
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///
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void notifyUsesThatTypeBecameConcrete();
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/// dropAllTypeUses - When this (abstract) type is resolved to be equal to
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/// another (more concrete) type, we must eliminate all references to other
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/// types, to avoid some circular reference problems.
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///
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void dropAllTypeUses();
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public:
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//===--------------------------------------------------------------------===//
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// Abstract Type handling methods - These types have special lifetimes, which
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// are managed by (add|remove)AbstractTypeUser. See comments in
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// AbstractTypeUser.h for more information.
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/// refineAbstractTypeTo - This function is used to when it is discovered that
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/// the 'this' abstract type is actually equivalent to the NewType specified.
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/// This causes all users of 'this' to switch to reference the more concrete
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/// type NewType and for 'this' to be deleted.
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///
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void refineAbstractTypeTo(const Type *NewType);
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void dump() const { Type::dump(); }
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const DerivedType *T) { return true; }
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static inline bool classof(const Type *T) {
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return T->isDerivedType();
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}
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};
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/// FunctionType - Class to represent function types
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///
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class FunctionType : public DerivedType {
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friend class TypeMap<FunctionValType, FunctionType>;
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bool isVarArgs;
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FunctionType(const FunctionType &); // Do not implement
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const FunctionType &operator=(const FunctionType &); // Do not implement
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protected:
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/// This should really be private, but it squelches a bogus warning
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/// from GCC to make them protected: warning: `class FunctionType' only
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/// defines private constructors and has no friends
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///
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/// Private ctor - Only can be created by a static member...
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///
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FunctionType(const Type *Result, const std::vector<const Type*> &Params,
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bool IsVarArgs);
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public:
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/// FunctionType::get - This static method is the primary way of constructing
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/// a FunctionType
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///
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static FunctionType *get(const Type *Result,
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const std::vector<const Type*> &Params,
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bool isVarArg);
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inline bool isVarArg() const { return isVarArgs; }
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inline const Type *getReturnType() const { return ContainedTys[0]; }
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typedef std::vector<PATypeHandle>::const_iterator param_iterator;
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param_iterator param_begin() const { return ContainedTys.begin()+1; }
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param_iterator param_end() const { return ContainedTys.end(); }
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// Parameter type accessors...
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const Type *getParamType(unsigned i) const { return ContainedTys[i+1]; }
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/// getNumParams - Return the number of fixed parameters this function type
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/// requires. This does not consider varargs.
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///
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unsigned getNumParams() const { return unsigned(ContainedTys.size()-1); }
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// Implement the AbstractTypeUser interface.
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virtual void refineAbstractType(const DerivedType *OldTy, const Type *NewTy);
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virtual void typeBecameConcrete(const DerivedType *AbsTy);
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const FunctionType *T) { return true; }
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static inline bool classof(const Type *T) {
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return T->getTypeID() == FunctionTyID;
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}
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};
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/// CompositeType - Common super class of ArrayType, StructType, PointerType
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/// and PackedType
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class CompositeType : public DerivedType {
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protected:
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inline CompositeType(TypeID id) : DerivedType(id) { }
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public:
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/// getTypeAtIndex - Given an index value into the type, return the type of
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/// the element.
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///
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virtual const Type *getTypeAtIndex(const Value *V) const = 0;
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virtual bool indexValid(const Value *V) const = 0;
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const CompositeType *T) { return true; }
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static inline bool classof(const Type *T) {
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return T->getTypeID() == ArrayTyID ||
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T->getTypeID() == StructTyID ||
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T->getTypeID() == PointerTyID ||
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T->getTypeID() == PackedTyID;
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}
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};
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/// StructType - Class to represent struct types
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///
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class StructType : public CompositeType {
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friend class TypeMap<StructValType, StructType>;
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StructType(const StructType &); // Do not implement
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const StructType &operator=(const StructType &); // Do not implement
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protected:
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/// This should really be private, but it squelches a bogus warning
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/// from GCC to make them protected: warning: `class StructType' only
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/// defines private constructors and has no friends
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///
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/// Private ctor - Only can be created by a static member...
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///
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StructType(const std::vector<const Type*> &Types);
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public:
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/// StructType::get - This static method is the primary way to create a
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/// StructType.
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///
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static StructType *get(const std::vector<const Type*> &Params);
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// Iterator access to the elements
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typedef std::vector<PATypeHandle>::const_iterator element_iterator;
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element_iterator element_begin() const { return ContainedTys.begin(); }
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element_iterator element_end() const { return ContainedTys.end(); }
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// Random access to the elements
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unsigned getNumElements() const { return unsigned(ContainedTys.size()); }
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const Type *getElementType(unsigned N) const {
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assert(N < ContainedTys.size() && "Element number out of range!");
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return ContainedTys[N];
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}
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/// getTypeAtIndex - Given an index value into the type, return the type of
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/// the element. For a structure type, this must be a constant value...
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///
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virtual const Type *getTypeAtIndex(const Value *V) const ;
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virtual bool indexValid(const Value *V) const;
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// Implement the AbstractTypeUser interface.
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virtual void refineAbstractType(const DerivedType *OldTy, const Type *NewTy);
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virtual void typeBecameConcrete(const DerivedType *AbsTy);
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const StructType *T) { return true; }
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static inline bool classof(const Type *T) {
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return T->getTypeID() == StructTyID;
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}
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};
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/// SequentialType - This is the superclass of the array, pointer and packed
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/// type classes. All of these represent "arrays" in memory. The array type
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/// represents a specifically sized array, pointer types are unsized/unknown
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/// size arrays, packed types represent specifically sized arrays that
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/// allow for use of SIMD instructions. SequentialType holds the common
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/// features of all, which stem from the fact that all three lay their
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/// components out in memory identically.
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///
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class SequentialType : public CompositeType {
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SequentialType(const SequentialType &); // Do not implement!
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const SequentialType &operator=(const SequentialType &); // Do not implement!
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protected:
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SequentialType(TypeID TID, const Type *ElType) : CompositeType(TID) {
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ContainedTys.reserve(1);
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ContainedTys.push_back(PATypeHandle(ElType, this));
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}
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public:
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inline const Type *getElementType() const { return ContainedTys[0]; }
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virtual bool indexValid(const Value *V) const;
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/// getTypeAtIndex - Given an index value into the type, return the type of
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/// the element. For sequential types, there is only one subtype...
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///
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virtual const Type *getTypeAtIndex(const Value *V) const {
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return ContainedTys[0];
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}
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const SequentialType *T) { return true; }
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static inline bool classof(const Type *T) {
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return T->getTypeID() == ArrayTyID ||
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T->getTypeID() == PointerTyID ||
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T->getTypeID() == PackedTyID;
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}
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};
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/// ArrayType - Class to represent array types
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///
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class ArrayType : public SequentialType {
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friend class TypeMap<ArrayValType, ArrayType>;
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uint64_t NumElements;
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ArrayType(const ArrayType &); // Do not implement
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const ArrayType &operator=(const ArrayType &); // Do not implement
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protected:
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/// This should really be private, but it squelches a bogus warning
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/// from GCC to make them protected: warning: `class ArrayType' only
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/// defines private constructors and has no friends
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///
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/// Private ctor - Only can be created by a static member...
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///
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ArrayType(const Type *ElType, uint64_t NumEl);
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public:
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/// ArrayType::get - This static method is the primary way to construct an
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/// ArrayType
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///
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static ArrayType *get(const Type *ElementType, uint64_t NumElements);
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inline uint64_t getNumElements() const { return NumElements; }
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// Implement the AbstractTypeUser interface.
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virtual void refineAbstractType(const DerivedType *OldTy, const Type *NewTy);
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virtual void typeBecameConcrete(const DerivedType *AbsTy);
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const ArrayType *T) { return true; }
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static inline bool classof(const Type *T) {
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return T->getTypeID() == ArrayTyID;
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}
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};
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/// PackedType - Class to represent packed types
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///
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class PackedType : public SequentialType {
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friend class TypeMap<PackedValType, PackedType>;
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unsigned NumElements;
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PackedType(const PackedType &); // Do not implement
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const PackedType &operator=(const PackedType &); // Do not implement
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protected:
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/// This should really be private, but it squelches a bogus warning
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/// from GCC to make them protected: warning: `class PackedType' only
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/// defines private constructors and has no friends
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///
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/// Private ctor - Only can be created by a static member...
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///
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PackedType(const Type *ElType, unsigned NumEl);
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public:
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/// PackedType::get - This static method is the primary way to construct an
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/// PackedType
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///
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static PackedType *get(const Type *ElementType, unsigned NumElements);
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/// @brief Return the number of elements in the Packed type.
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inline unsigned getNumElements() const { return NumElements; }
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/// @brief Return the number of bits in the Packed type.
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inline unsigned getBitWidth() const {
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return NumElements *getElementType()->getPrimitiveSizeInBits();
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}
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// Implement the AbstractTypeUser interface.
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virtual void refineAbstractType(const DerivedType *OldTy, const Type *NewTy);
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virtual void typeBecameConcrete(const DerivedType *AbsTy);
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const PackedType *T) { return true; }
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static inline bool classof(const Type *T) {
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return T->getTypeID() == PackedTyID;
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}
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};
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/// PointerType - Class to represent pointers
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///
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class PointerType : public SequentialType {
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friend class TypeMap<PointerValType, PointerType>;
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PointerType(const PointerType &); // Do not implement
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const PointerType &operator=(const PointerType &); // Do not implement
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protected:
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// This should really be private, but it squelches a bogus warning
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// from GCC to make them protected: warning: `class PointerType' only
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// defines private constructors and has no friends
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// Private ctor - Only can be created by a static member...
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PointerType(const Type *ElType);
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public:
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/// PointerType::get - This is the only way to construct a new pointer type.
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static PointerType *get(const Type *ElementType);
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// Implement the AbstractTypeUser interface.
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virtual void refineAbstractType(const DerivedType *OldTy, const Type *NewTy);
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virtual void typeBecameConcrete(const DerivedType *AbsTy);
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// Implement support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const PointerType *T) { return true; }
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static inline bool classof(const Type *T) {
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return T->getTypeID() == PointerTyID;
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}
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};
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/// OpaqueType - Class to represent abstract types
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///
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class OpaqueType : public DerivedType {
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OpaqueType(const OpaqueType &); // DO NOT IMPLEMENT
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const OpaqueType &operator=(const OpaqueType &); // DO NOT IMPLEMENT
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protected:
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/// This should really be private, but it squelches a bogus warning
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/// from GCC to make them protected: warning: `class OpaqueType' only
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/// defines private constructors and has no friends
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///
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/// Private ctor - Only can be created by a static member...
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OpaqueType();
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public:
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/// OpaqueType::get - Static factory method for the OpaqueType class...
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///
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static OpaqueType *get() {
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return new OpaqueType(); // All opaque types are distinct
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}
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// Implement the AbstractTypeUser interface.
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virtual void refineAbstractType(const DerivedType *OldTy, const Type *NewTy) {
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abort(); // FIXME: this is not really an AbstractTypeUser!
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}
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virtual void typeBecameConcrete(const DerivedType *AbsTy) {
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abort(); // FIXME: this is not really an AbstractTypeUser!
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}
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// Implement support for type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const OpaqueType *T) { return true; }
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static inline bool classof(const Type *T) {
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return T->getTypeID() == OpaqueTyID;
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}
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};
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} // End llvm namespace
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#endif
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