X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FType.h;h=d439233d8c05d1d643c50de1a26259b5db8c9a09;hb=50564ebc9e3d7ff806062023e6511e91065df0d2;hp=72e70b44a95a728ed7c8db0f154ed7d68525d66c;hpb=ef1af7d6d5be039e7eea46f8f3a2720fb5a1a153;p=oota-llvm.git diff --git a/include/llvm/Type.h b/include/llvm/Type.h index 72e70b44a95..d439233d8c0 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. // //===----------------------------------------------------------------------===// @@ -14,9 +14,9 @@ #include "llvm/AbstractTypeUser.h" #include "llvm/Support/Casting.h" #include "llvm/Support/DataTypes.h" -#include "llvm/Support/Streams.h" +#include "llvm/System/Atomic.h" #include "llvm/ADT/GraphTraits.h" -#include "llvm/ADT/iterator" +#include "llvm/ADT/iterator.h" #include #include @@ -26,6 +26,8 @@ class DerivedType; class PointerType; class IntegerType; class TypeMapBase; +class raw_ostream; +class Module; /// This file contains the declaration of the Type class. For more "Type" type /// stuff, look in DerivedTypes.h. @@ -74,13 +76,13 @@ public: FP128TyID, ///< 4: 128 bit floating point type (112-bit mantissa) PPC_FP128TyID, ///< 5: 128 bit floating point type (two 64-bits) LabelTyID, ///< 6: Labels + MetadataTyID, ///< 7: Metadata // Derived types... see DerivedTypes.h file... // Make sure FirstDerivedTyID stays up to date!!! - IntegerTyID, ///< 7: Arbitrary bit width integers - FunctionTyID, ///< 8: Functions - StructTyID, ///< 9: Structures - PackedStructTyID,///< 10: Packed Structure. This is for bitcode only + IntegerTyID, ///< 8: Arbitrary bit width integers + FunctionTyID, ///< 9: Functions + StructTyID, ///< 10: Structures ArrayTyID, ///< 11: Arrays PointerTyID, ///< 12: Pointers OpaqueTyID, ///< 13: Opaque: type with unknown structure @@ -101,7 +103,7 @@ private: /// has no AbstractTypeUsers, the type is deleted. This is only sensical for /// derived types. /// - mutable unsigned RefCount; + mutable sys::cas_flag RefCount; const Type *getForwardedTypeInternal() const; @@ -157,12 +159,16 @@ protected: PATypeHandle *ContainedTys; public: + void print(raw_ostream &O) const; 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; + /// @brief Debugging support: print to stderr (use type names from context + /// module). + void dump(const Module *Context) const; + //===--------------------------------------------------------------------===// // Property accessors for dealing with types... Some of these virtual methods // are defined in private classes defined in Type.cpp for primitive types. @@ -173,8 +179,8 @@ public: /// inline TypeID getTypeID() const { return ID; } - /// getDescription - Return the string representation of the type... - const std::string &getDescription() const; + /// getDescription - Return the string representation of the type. + std::string getDescription() const; /// isInteger - True if this is an instance of IntegerType. /// @@ -200,7 +206,7 @@ public: inline bool isAbstract() const { return Abstract; } /// canLosslesslyBitCastTo - Return true if this type could be converted - /// with a lossless BitCast to type 'Ty'. For example, uint to int. BitCasts + /// with a lossless BitCast to type 'Ty'. For example, i8* to i32*. 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 @@ -213,13 +219,33 @@ 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 == 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 /// get the actual size for a particular target, it is reasonable to use the /// TargetData subsystem to do this. @@ -230,8 +256,7 @@ public: 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 != VectorTyID && - ID != PackedStructTyID) + 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. @@ -245,7 +270,17 @@ public: /// unsigned getPrimitiveSizeInBits() const; - /// getForwaredType - Return the type that this type has been resolved to if + /// getScalarSizeInBits - If this is a vector type, return the + /// getPrimitiveSizeInBits value for the element type. Otherwise return the + /// getPrimitiveSizeInBits value for this type. + unsigned getScalarSizeInBits() const; + + /// getFPMantissaWidth - Return the width of the mantissa of this type. This + /// is only valid on 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; + + /// 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. @@ -259,6 +294,10 @@ public: /// function. const Type *getVAArgsPromotedType() const; + /// getScalarType - If this is a vector type, return the element type, + /// otherwise return this. + const Type *getScalarType() const; + //===--------------------------------------------------------------------===// // Type Iteration support // @@ -290,16 +329,16 @@ public: //===--------------------------------------------------------------------===// // These are the builtin types that are always available... // - static const Type *VoidTy, *LabelTy, *FloatTy, *DoubleTy; + static const Type *VoidTy, *LabelTy, *FloatTy, *DoubleTy, *MetadataTy; 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!"); - ++RefCount; + sys::AtomicIncrement(&RefCount); } void dropRef() const { @@ -308,17 +347,15 @@ 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()) + sys::cas_flag OldCount = sys::AtomicDecrement(&RefCount); + if (OldCount == 0 && AbstractTypeUsers.empty()) this->destroy(); } /// 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); - } + void addAbstractTypeUser(AbstractTypeUser *U) const; /// 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 @@ -328,6 +365,10 @@ public: /// void removeAbstractTypeUser(AbstractTypeUser *U) const; + /// getPointerTo - Return a pointer to the current type. This is equivalent + /// to PointerType::get(Foo, AddrSpace). + PointerType *getPointerTo(unsigned AddrSpace = 0) const; + 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 @@ -359,9 +400,21 @@ inline void PATypeHandle::removeUser() { Ty->removeAbstractTypeUser(User); } -// Define inline methods for PATypeHolder... +// Define inline methods for PATypeHolder. + +/// 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; +} inline void PATypeHolder::addRef() { + assert(Ty && "Type Holder has a null type!"); if (Ty->isAbstract()) Ty->addRef(); } @@ -407,6 +460,7 @@ template <> inline bool isa_impl(const Type &Ty) { } std::ostream &operator<<(std::ostream &OS, const Type &T); +raw_ostream &operator<<(raw_ostream &OS, const Type &T); } // End llvm namespace