X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FType.h;h=fe3c392c7c6cd03f597aca9ead7c76c7800fcc7f;hb=e089160d1065d83986fd97fae7f0af08c03e7d47;hp=3daafa6cac4317d2b95553cb91d9ee712fe1a9f9;hpb=e167af30239bdcd3ec0ffbed1f4692b4d9d07228;p=oota-llvm.git diff --git a/include/llvm/Type.h b/include/llvm/Type.h index 3daafa6cac4..fe3c392c7c6 100644 --- a/include/llvm/Type.h +++ b/include/llvm/Type.h @@ -2,8 +2,8 @@ // // The LLVM Compiler Infrastructure // -// This file was developed by the LLVM research group and is distributed under -// the University of Illinois Open Source License. See LICENSE.TXT for details. +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// @@ -14,20 +14,17 @@ #include "llvm/AbstractTypeUser.h" #include "llvm/Support/Casting.h" #include "llvm/Support/DataTypes.h" +#include "llvm/Support/Streams.h" #include "llvm/ADT/GraphTraits.h" -#include "llvm/ADT/iterator" +#include "llvm/ADT/iterator.h" #include #include namespace llvm { -class ArrayType; class DerivedType; -class FunctionType; -class OpaqueType; class PointerType; -class StructType; -class PackedType; +class IntegerType; class TypeMapBase; /// This file contains the declaration of the Type class. For more "Type" type @@ -42,6 +39,11 @@ class TypeMapBase; /// /// Once allocated, Types are never free'd, unless they are an abstract type /// that is resolved to a more concrete type. +/// +/// Types themself don't have a name, and can be named either by: +/// - using SymbolTable instance, typically from some Module, +/// - using convenience methods in the Module class (which uses module's +/// SymbolTable too). /// /// Opaque types are simple derived types with no state. There may be many /// different Opaque type objects floating around, but two are only considered @@ -50,14 +52,14 @@ class TypeMapBase; /// /// Opaque types are also kinda weird and scary and different because they have /// to keep a list of uses of the type. When, through linking, parsing, or -/// bytecode reading, they become resolved, they need to find and update all +/// bitcode reading, they become resolved, they need to find and update all /// users of the unknown type, causing them to reference a new, more concrete /// type. Opaque types are deleted when their use list dwindles to zero users. /// /// @brief Root of type hierarchy class Type : public AbstractTypeUser { public: - ///===-------------------------------------------------------------------===// + //===-------------------------------------------------------------------===// /// Definitions of all of the base types for the Type system. Based on this /// value, you can cast to a "DerivedType" subclass (see DerivedTypes.h) /// Note: If you add an element to this, you need to add an element to the @@ -65,30 +67,33 @@ public: /// enum TypeID { // PrimitiveTypes .. make sure LastPrimitiveTyID stays up to date - VoidTyID = 0 , BoolTyID, // 0, 1: Basics... - UByteTyID , SByteTyID, // 2, 3: 8 bit types... - UShortTyID , ShortTyID, // 4, 5: 16 bit types... - UIntTyID , IntTyID, // 6, 7: 32 bit types... - ULongTyID , LongTyID, // 8, 9: 64 bit types... - FloatTyID , DoubleTyID, // 10,11: Floating point types... - LabelTyID , // 12 : Labels... + VoidTyID = 0, ///< 0: type with no size + FloatTyID, ///< 1: 32 bit floating point type + DoubleTyID, ///< 2: 64 bit floating point type + X86_FP80TyID, ///< 3: 80 bit floating point type (X87) + FP128TyID, ///< 4: 128 bit floating point type (112-bit mantissa) + PPC_FP128TyID, ///< 5: 128 bit floating point type (two 64-bits) + LabelTyID, ///< 6: Labels // Derived types... see DerivedTypes.h file... // Make sure FirstDerivedTyID stays up to date!!! - FunctionTyID , StructTyID, // Functions... Structs... - ArrayTyID , PointerTyID, // Array... pointer... - OpaqueTyID, // Opaque type instances... - PackedTyID, // SIMD 'packed' format... - //... + IntegerTyID, ///< 7: Arbitrary bit width integers + FunctionTyID, ///< 8: Functions + StructTyID, ///< 9: Structures + ArrayTyID, ///< 10: Arrays + PointerTyID, ///< 11: Pointers + OpaqueTyID, ///< 12: Opaque: type with unknown structure + VectorTyID, ///< 13: SIMD 'packed' format, or other vector type NumTypeIDs, // Must remain as last defined ID LastPrimitiveTyID = LabelTyID, - FirstDerivedTyID = FunctionTyID + FirstDerivedTyID = IntegerTyID }; private: TypeID ID : 8; // The current base type of this type. bool Abstract : 1; // True if type contains an OpaqueType + unsigned SubclassData : 23; //Space for subclasses to store data /// RefCount - This counts the number of PATypeHolders that are pointing to /// this type. When this number falls to zero, if the type is abstract and @@ -98,11 +103,17 @@ private: mutable unsigned RefCount; const Type *getForwardedTypeInternal() const; + + // Some Type instances are allocated as arrays, some aren't. So we provide + // this method to get the right kind of destruction for the type of Type. + void destroy() const; // const is a lie, this does "delete this"! + protected: - Type(const char *Name, TypeID id); - Type(TypeID id) : ID(id), Abstract(false), RefCount(0), ForwardType(0) {} + explicit Type(TypeID id) : ID(id), Abstract(false), SubclassData(0), + RefCount(0), ForwardType(0), NumContainedTys(0), + ContainedTys(0) {} virtual ~Type() { - assert(AbstractTypeUsers.empty()); + assert(AbstractTypeUsers.empty() && "Abstract types remain"); } /// Types can become nonabstract later, if they are refined. @@ -111,26 +122,42 @@ protected: unsigned getRefCount() const { return RefCount; } + unsigned getSubclassData() const { return SubclassData; } + void setSubclassData(unsigned val) { SubclassData = val; } + /// ForwardType - This field is used to implement the union find scheme for /// abstract types. When types are refined to other types, this field is set /// to the more refined type. Only abstract types can be forwarded. mutable const Type *ForwardType; - /// ContainedTys - The list of types contained by this one. For example, this - /// includes the arguments of a function type, the elements of the structure, - /// the pointee of a pointer, etc. Note that keeping this vector in the Type - /// class wastes some space for types that do not contain anything (such as - /// primitive types). However, keeping it here allows the subtype_* members - /// to be implemented MUCH more efficiently, and dynamically very few types do - /// not contain any elements (most are derived). - std::vector ContainedTys; /// AbstractTypeUsers - Implement a list of the users that need to be notified /// if I am a type, and I get resolved into a more concrete type. /// mutable std::vector AbstractTypeUsers; + + /// NumContainedTys - Keeps track of how many PATypeHandle instances there + /// are at the end of this type instance for the list of contained types. It + /// is the subclasses responsibility to set this up. Set to 0 if there are no + /// contained types in this type. + unsigned NumContainedTys; + + /// ContainedTys - A pointer to the array of Types (PATypeHandle) contained + /// by this Type. For example, this includes the arguments of a function + /// type, the elements of a structure, the pointee of a pointer, the element + /// type of an array, etc. This pointer may be 0 for types that don't + /// contain other types (Integer, Double, Float). In general, the subclass + /// should arrange for space for the PATypeHandles to be included in the + /// allocation of the type object and set this pointer to the address of the + /// first element. This allows the Type class to manipulate the ContainedTys + /// without understanding the subclass's placement for this array. keeping + /// it here also allows the subtype_* members to be implemented MUCH more + /// efficiently, and dynamically very few types do not contain any elements. + PATypeHandle *ContainedTys; + public: void print(std::ostream &O) const; + void print(std::ostream *O) const { if (O) print(*O); } /// @brief Debugging support: print to stderr void dump() const; @@ -148,47 +175,35 @@ public: /// getDescription - Return the string representation of the type... const std::string &getDescription() const; - /// isSigned - Return whether an integral numeric type is signed. This is - /// true for SByteTy, ShortTy, IntTy, LongTy. Note that this is not true for - /// Float and Double. + /// isInteger - True if this is an instance of IntegerType. /// - bool isSigned() const { - return ID == SByteTyID || ID == ShortTyID || - ID == IntTyID || ID == LongTyID; - } + bool isInteger() const { return ID == IntegerTyID; } - /// isUnsigned - Return whether a numeric type is unsigned. This is not quite - /// the complement of isSigned... nonnumeric types return false as they do - /// with isSigned. This returns true for UByteTy, UShortTy, UIntTy, and - /// ULongTy + /// isIntOrIntVector - Return true if this is an integer type or a vector of + /// integer types. /// - bool isUnsigned() const { - return ID == UByteTyID || ID == UShortTyID || - ID == UIntTyID || ID == ULongTyID; - } - - /// isInteger - Equivalent to isSigned() || isUnsigned() - /// - bool isInteger() const { return ID >= UByteTyID && ID <= LongTyID; } - - /// isIntegral - Returns true if this is an integral type, which is either - /// BoolTy or one of the Integer types. - /// - bool isIntegral() const { return isInteger() || this == BoolTy; } - + bool isIntOrIntVector() const; + /// isFloatingPoint - Return true if this is one of the two floating point /// types - bool isFloatingPoint() const { return ID == FloatTyID || ID == DoubleTyID; } + bool isFloatingPoint() const { return ID == FloatTyID || ID == DoubleTyID || + ID == X86_FP80TyID || ID == FP128TyID || ID == PPC_FP128TyID; } + /// isFPOrFPVector - Return true if this is a FP type or a vector of FP types. + /// + bool isFPOrFPVector() const; + /// isAbstract - True if the type is either an Opaque type, or is a derived /// type that includes an opaque type somewhere in it. /// inline bool isAbstract() const { return Abstract; } - /// isLosslesslyConvertibleTo - Return true if this type can be converted to - /// 'Ty' without any reinterpretation of bits. For example, uint to int. - /// - bool isLosslesslyConvertibleTo(const Type *Ty) const; + /// canLosslesslyBitCastTo - Return true if this type could be converted + /// with a lossless BitCast to type 'Ty'. For example, uint to int. BitCasts + /// are valid for types of the same size only where no re-interpretation of + /// the bits is done. + /// @brief Determine if this type could be losslessly bitcast to Ty + bool canLosslesslyBitCastTo(const Type *Ty) const; /// Here are some useful little methods to query what type derived types are @@ -197,11 +212,31 @@ public: inline bool isPrimitiveType() const { return ID <= LastPrimitiveTyID; } inline bool isDerivedType() const { return ID >= FirstDerivedTyID; } - /// isFirstClassType - Return true if the value is holdable in a register. + /// isFirstClassType - Return true if the type is "first class", meaning it + /// is a valid type for a Value. /// inline bool isFirstClassType() const { + // There are more first-class kinds than non-first-class kinds, so a + // negative test is simpler than a positive one. + return ID != FunctionTyID && ID != VoidTyID && ID != OpaqueTyID; + } + + /// isSingleValueType - Return true if the type is a valid type for a + /// virtual register in codegen. This includes all first-class types + /// except struct and array types. + /// + inline bool isSingleValueType() const { return (ID != VoidTyID && ID <= LastPrimitiveTyID) || - ID == PointerTyID || ID == PackedTyID; + ID == IntegerTyID || ID == PointerTyID || ID == VectorTyID; + } + + /// isAggregateType - Return true if the type is an aggregate type. This + /// means it is valid as the first operand of an insertvalue or + /// extractvalue instruction. This includes struct and array types, but + /// does not include vector types. + /// + inline bool isAggregateType() const { + return ID == StructTyID || ID == ArrayTyID; } /// isSized - Return true if it makes sense to take the size of this type. To @@ -210,41 +245,38 @@ public: /// bool isSized() const { // If it's a primitive, it is always sized. - if (ID >= BoolTyID && ID <= DoubleTyID || ID == PointerTyID) + if (ID == IntegerTyID || isFloatingPoint() || ID == PointerTyID) return true; // If it is not something that can have a size (e.g. a function or label), // it doesn't have a size. - if (ID != StructTyID && ID != ArrayTyID && ID != PackedTyID) + if (ID != StructTyID && ID != ArrayTyID && ID != VectorTyID) return false; // If it is something that can have a size and it's concrete, it definitely // has a size, otherwise we have to try harder to decide. return !isAbstract() || isSizedDerivedType(); } - /// getPrimitiveSize - Return the basic size of this type if it is a primitive - /// type. These are fixed by LLVM and are not target dependent. This will - /// return zero if the type does not have a size or is not a primitive type. + /// getPrimitiveSizeInBits - Return the basic size of this type if it is a + /// primitive type. These are fixed by LLVM and are not target dependent. + /// This will return zero if the type does not have a size or is not a + /// primitive type. /// - unsigned getPrimitiveSize() const; unsigned getPrimitiveSizeInBits() const; - - /// getUnsignedVersion - If this is an integer type, return the unsigned - /// variant of this type. For example int -> uint. - const Type *getUnsignedVersion() const; - - /// getSignedVersion - If this is an integer type, return the signed variant - /// of this type. For example uint -> int. - const Type *getSignedVersion() const; - /// getIntegralTypeMask - Return a bitmask with ones set for all of the bits - /// that can be set by an unsigned version of this type. This is 0xFF for - /// sbyte/ubyte, 0xFFFF for shorts, etc. - uint64_t getIntegralTypeMask() const { - assert(isIntegral() && "This only works for integral types!"); - return ~uint64_t(0UL) >> (64-getPrimitiveSizeInBits()); + /// getFPMantissaWidth - Return the width of the mantissa of this type. This + /// is only valid on scalar floating point types. If the FP type does not + /// have a stable mantissa (e.g. ppc long double), this method returns -1. + int getFPMantissaWidth() const { + assert(isFloatingPoint() && "Not a floating point type!"); + if (ID == FloatTyID) return 24; + if (ID == DoubleTyID) return 53; + if (ID == X86_FP80TyID) return 64; + if (ID == FP128TyID) return 113; + assert(ID == PPC_FP128TyID && "unknown fp type"); + return -1; } - /// getForwaredType - Return the type that this type has been resolved to if + /// getForwardedType - Return the type that this type has been resolved to if /// it has been resolved to anything. This is used to implement the /// union-find algorithm for type resolution, and shouldn't be used by general /// purpose clients. @@ -256,37 +288,27 @@ public: /// getVAArgsPromotedType - Return the type an argument of this type /// will be promoted to if passed through a variable argument /// function. - const Type *getVAArgsPromotedType() const { - if (ID == BoolTyID || ID == UByteTyID || ID == UShortTyID) - return Type::UIntTy; - else if (ID == SByteTyID || ID == ShortTyID) - return Type::IntTy; - else if (ID == FloatTyID) - return Type::DoubleTy; - else - return this; - } + const Type *getVAArgsPromotedType() const; //===--------------------------------------------------------------------===// // Type Iteration support // - typedef std::vector::const_iterator subtype_iterator; - subtype_iterator subtype_begin() const { return ContainedTys.begin(); } - subtype_iterator subtype_end() const { return ContainedTys.end(); } + typedef PATypeHandle *subtype_iterator; + subtype_iterator subtype_begin() const { return ContainedTys; } + subtype_iterator subtype_end() const { return &ContainedTys[NumContainedTys];} /// getContainedType - This method is used to implement the type iterator /// (defined a the end of the file). For derived types, this returns the /// types 'contained' in the derived type. /// const Type *getContainedType(unsigned i) const { - assert(i < ContainedTys.size() && "Index out of range!"); - return ContainedTys[i]; + assert(i < NumContainedTys && "Index out of range!"); + return ContainedTys[i].get(); } /// getNumContainedTypes - Return the number of types in the derived type. /// - typedef std::vector::size_type size_type; - size_type getNumContainedTypes() const { return ContainedTys.size(); } + unsigned getNumContainedTypes() const { return NumContainedTys; } //===--------------------------------------------------------------------===// // Static members exported by the Type class itself. Useful for getting @@ -299,17 +321,12 @@ public: //===--------------------------------------------------------------------===// // These are the builtin types that are always available... // - static Type *VoidTy , *BoolTy; - static Type *SByteTy, *UByteTy, - *ShortTy, *UShortTy, - *IntTy , *UIntTy, - *LongTy , *ULongTy; - static Type *FloatTy, *DoubleTy; - - static Type* LabelTy; + static const Type *VoidTy, *LabelTy, *FloatTy, *DoubleTy; + static const Type *X86_FP80Ty, *FP128Ty, *PPC_FP128Ty; + static const IntegerType *Int1Ty, *Int8Ty, *Int16Ty, *Int32Ty, *Int64Ty; /// Methods for support type inquiry through isa, cast, and dyn_cast: - static inline bool classof(const Type *T) { return true; } + static inline bool classof(const Type *) { return true; } void addRef() const { assert(isAbstract() && "Cannot add a reference to a non-abstract type!"); @@ -323,7 +340,7 @@ public: // If this is the last PATypeHolder using this object, and there are no // PATypeHandles using it, the type is dead, delete it now. if (--RefCount == 0 && AbstractTypeUsers.empty()) - delete this; + this->destroy(); } /// addAbstractTypeUser - Notify an abstract type that there is a new user of @@ -342,11 +359,6 @@ public: /// void removeAbstractTypeUser(AbstractTypeUser *U) const; - /// clearAllTypeMaps - This method frees all internal memory used by the - /// type subsystem, which can be used in environments where this memory is - /// otherwise reported as a leak. - static void clearAllTypeMaps(); - private: /// isSizedDerivedType - Derived types like structures and arrays are sized /// iff all of the members of the type are sized as well. Since asking for @@ -366,13 +378,7 @@ protected: //===----------------------------------------------------------------------===// // Define some inline methods for the AbstractTypeUser.h:PATypeHandle class. // These are defined here because they MUST be inlined, yet are dependent on -// the definition of the Type class. Of course Type derives from Value, which -// contains an AbstractTypeUser instance, so there is no good way to factor out -// the code. Hence this bit of uglyness. -// -// In the long term, Type should not derive from Value, allowing -// AbstractTypeUser.h to #include Type.h, allowing us to eliminate this -// nastyness entirely. +// the definition of the Type class. // inline void PATypeHandle::addUser() { assert(Ty && "Type Handle has a null type!"); @@ -384,9 +390,10 @@ inline void PATypeHandle::removeUser() { Ty->removeAbstractTypeUser(User); } -// Define inline methods for PATypeHolder... +// Define inline methods for PATypeHolder. inline void PATypeHolder::addRef() { + assert(Ty && "Type Holder has a null type!"); if (Ty->isAbstract()) Ty->addRef(); } @@ -396,18 +403,6 @@ inline void PATypeHolder::dropRef() { Ty->dropRef(); } -/// get - This implements the forwarding part of the union-find algorithm for -/// 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 Type* PATypeHolder::get() const { - const Type *NewTy = Ty->getForwardedType(); - if (!NewTy) return const_cast(Ty); - return *const_cast(this) = NewTy; -} - - //===----------------------------------------------------------------------===// // Provide specializations of GraphTraits to be able to treat a type as a