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edde66d9e0
Add a new isIntegral virtual function git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207 91177308-0d34-0410-b5e6-96231b3b80d8
136 lines
5.0 KiB
C++
136 lines
5.0 KiB
C++
//===-- llvm/Type.h - Classes for handling data types ------------*- C++ -*--=//
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//
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// This file contains the declaration of the Type class. For more "Type" type
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// stuff, look in DerivedTypes.h and Opt/ConstantHandling.h
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//
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// Note that instances of the Type class are immutable: once they are created,
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// they are never changed. Also note that only one instance of a particular
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// type is ever created. Thus seeing if two types are equal is a matter of
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// doing a trivial pointer comparison.
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//
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// Types, once allocated, are never free'd.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TYPE_H
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#define LLVM_TYPE_H
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#include "llvm/Value.h"
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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 MethodType;
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class ArrayType;
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class StructType;
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class PointerType;
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class Type : public Value {
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public:
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//===--------------------------------------------------------------------===//
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// Definitions of all of the base types for the Type system. Based on this
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// value, you can cast to a "DerivedType" subclass (see DerivedTypes.h)
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// Note: If you add an element to this, you need to add an element to the
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// Type::getPrimitiveType function, or else things will break!
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//
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enum PrimitiveID {
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VoidTyID = 0 , BoolTyID, // 0, 1: Basics...
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UByteTyID , SByteTyID, // 2, 3: 8 bit types...
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UShortTyID , ShortTyID, // 4, 5: 16 bit types...
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UIntTyID , IntTyID, // 6, 7: 32 bit types...
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ULongTyID , LongTyID, // 8, 9: 64 bit types...
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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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// 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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//...
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NumPrimitiveIDs, // Must remain as last defined ID
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FirstDerivedTyID = MethodTyID,
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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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// ConstRulesImpl - See Opt/ConstantHandling.h for more info
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mutable const opt::ConstRules *ConstRulesImpl;
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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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// isSigned - Return whether a numeric type is signed.
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virtual bool isSigned() const { return 0; }
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// isUnsigned - Return whether a numeric type is unsigned. This is not
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// quite the complement of isSigned... nonnumeric types return false as they
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// do with isSigned.
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//
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virtual bool isUnsigned() const { return 0; }
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// isIntegral - Equilivent to isSigned() || isUnsigned, but with only a single
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// virtual function invocation.
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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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// getPrimitiveType/getUniqueIDType - Return a type based on an identifier.
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static const Type *getPrimitiveType(PrimitiveID IDNumber);
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static const Type *getUniqueIDType(unsigned UID);
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// Methods for dealing with constants uniformly. See Opt/ConstantHandling.h
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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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public: // These are the builtin types that are always available...
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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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*IntTy , *UIntTy,
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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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// 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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//
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inline bool isDerivedType() const { return ID >= FirstDerivedTyID; }
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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 MethodType *isMethodType() const {
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return ID == MethodTyID ? (const MethodType*)this : 0;
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}
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inline bool isModuleType() const { return ID == ModuleTyID; }
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inline const ArrayType *isArrayType() const {
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return ID == ArrayTyID ? (const ArrayType*)this : 0;
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}
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inline const PointerType *isPointerType() const {
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return ID == PointerTyID ? (const PointerType*)this : 0;
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}
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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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};
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#endif
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