X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=include%2Fllvm%2FIR%2FAttributes.h;h=e2a0a7ee395a2303b8106c19bc66a91e6fb62c48;hp=2fce6ce95388ed05b1904c273a7b377ed0950fda;hb=13146c7e3b143f021e3e58a7bdb642e43f8e7b57;hpb=a9b9f0ad802ef6973534a9a247716e4a8e079635 diff --git a/include/llvm/IR/Attributes.h b/include/llvm/IR/Attributes.h index 2fce6ce9538..e2a0a7ee395 100644 --- a/include/llvm/IR/Attributes.h +++ b/include/llvm/IR/Attributes.h @@ -17,17 +17,22 @@ #define LLVM_IR_ATTRIBUTES_H #include "llvm/ADT/ArrayRef.h" -#include "llvm/ADT/DenseSet.h" #include "llvm/ADT/FoldingSet.h" -#include "llvm/Support/MathExtras.h" +#include "llvm/Support/Compiler.h" +#include "llvm/Support/PointerLikeTypeTraits.h" +#include #include +#include #include namespace llvm { class AttrBuilder; class AttributeImpl; +class AttributeSetImpl; +class AttributeSetNode; class Constant; +template struct DenseMapInfo; class LLVMContext; class Type; @@ -40,13 +45,13 @@ class Type; class Attribute { public: /// This enumeration lists the attributes that can be associated with - /// parameters, function results or the function itself. + /// parameters, function results, or the function itself. /// - /// Note: uwtable is about the ABI or the user mandating an entry in the - /// unwind table. The nounwind attribute is about an exception passing by the - /// function. + /// Note: The `uwtable' attribute is about the ABI or the user mandating an + /// entry in the unwind table. The `nounwind' attribute is about an exception + /// passing by the function. /// - /// In a theoretical system that uses tables for profiling and sjlj for + /// In a theoretical system that uses tables for profiling and SjLj for /// exceptions, they would be fully independent. In a normal system that uses /// tables for both, the semantics are: /// @@ -59,30 +64,41 @@ public: enum AttrKind { // IR-Level Attributes None, ///< No attributes have been set - AddressSafety, ///< Address safety checking is on. Alignment, ///< Alignment of parameter (5 bits) ///< stored as log2 of alignment with +1 bias ///< 0 means unaligned (different from align(1)) AlwaysInline, ///< inline=always + Builtin, ///< Callee is recognized as a builtin, despite + ///< nobuiltin attribute on its declaration. ByVal, ///< Pass structure by value + InAlloca, ///< Pass structure in an alloca + Cold, ///< Marks function as being in a cold path. + Convergent, ///< Can only be moved to control-equivalent blocks InlineHint, ///< Source said inlining was desirable InReg, ///< Force argument to be passed in register + JumpTable, ///< Build jump-instruction tables and replace refs. MinSize, ///< Function must be optimized for size first Naked, ///< Naked function Nest, ///< Nested function static chain NoAlias, ///< Considered to not alias after call + NoBuiltin, ///< Callee isn't recognized as a builtin NoCapture, ///< Function creates no aliases of pointer NoDuplicate, ///< Call cannot be duplicated NoImplicitFloat, ///< Disable implicit floating point insts NoInline, ///< inline=never NonLazyBind, ///< Function is called early and/or ///< often, so lazy binding isn't worthwhile + NonNull, ///< Pointer is known to be not null + Dereferenceable, ///< Pointer is known to be dereferenceable + DereferenceableOrNull, ///< Pointer is either null or dereferenceable NoRedZone, ///< Disable redzone NoReturn, ///< Mark the function as not returning NoUnwind, ///< Function doesn't unwind stack OptimizeForSize, ///< opt_size + OptimizeNone, ///< Function must not be optimized. ReadNone, ///< Function does not access memory ReadOnly, ///< Function only reads from memory + Returned, ///< Return value is always equal to this argument ReturnsTwice, ///< Function can return twice SExt, ///< Sign extended before/after call StackAlignment, ///< Alignment of stack for function (3 bits) @@ -93,34 +109,73 @@ public: StackProtectReq, ///< Stack protection required. StackProtectStrong, ///< Strong Stack protection. StructRet, ///< Hidden pointer to structure to return + SanitizeAddress, ///< AddressSanitizer is on. + SanitizeThread, ///< ThreadSanitizer is on. + SanitizeMemory, ///< MemorySanitizer is on. UWTable, ///< Function must be in a unwind table ZExt, ///< Zero extended before/after call - EndAttrKinds, ///< Sentinal value useful for loops - - AttrKindEmptyKey, ///< Empty key value for DenseMapInfo - AttrKindTombstoneKey ///< Tombstone key value for DenseMapInfo + EndAttrKinds ///< Sentinal value useful for loops }; private: AttributeImpl *pImpl; Attribute(AttributeImpl *A) : pImpl(A) {} public: - Attribute() : pImpl(0) {} + Attribute() : pImpl(nullptr) {} + + //===--------------------------------------------------------------------===// + // Attribute Construction + //===--------------------------------------------------------------------===// /// \brief Return a uniquified Attribute object. - static Attribute get(LLVMContext &Context, ArrayRef Kinds); - static Attribute get(LLVMContext &Context, AttrBuilder &B); + static Attribute get(LLVMContext &Context, AttrKind Kind, uint64_t Val = 0); + static Attribute get(LLVMContext &Context, StringRef Kind, + StringRef Val = StringRef()); /// \brief Return a uniquified Attribute object that has the specific /// alignment set. static Attribute getWithAlignment(LLVMContext &Context, uint64_t Align); static Attribute getWithStackAlignment(LLVMContext &Context, uint64_t Align); + static Attribute getWithDereferenceableBytes(LLVMContext &Context, + uint64_t Bytes); + static Attribute getWithDereferenceableOrNullBytes(LLVMContext &Context, + uint64_t Bytes); + + //===--------------------------------------------------------------------===// + // Attribute Accessors + //===--------------------------------------------------------------------===// + + /// \brief Return true if the attribute is an Attribute::AttrKind type. + bool isEnumAttribute() const; + + /// \brief Return true if the attribute is an integer attribute. + bool isIntAttribute() const; + + /// \brief Return true if the attribute is a string (target-dependent) + /// attribute. + bool isStringAttribute() const; /// \brief Return true if the attribute is present. bool hasAttribute(AttrKind Val) const; - /// \brief Return true if attributes exist - bool hasAttributes() const; + /// \brief Return true if the target-dependent attribute is present. + bool hasAttribute(StringRef Val) const; + + /// \brief Return the attribute's kind as an enum (Attribute::AttrKind). This + /// requires the attribute to be an enum or alignment attribute. + Attribute::AttrKind getKindAsEnum() const; + + /// \brief Return the attribute's value as an integer. This requires that the + /// attribute be an alignment attribute. + uint64_t getValueAsInt() const; + + /// \brief Return the attribute's kind as a string. This requires the + /// attribute to be a string attribute. + StringRef getKindAsString() const; + + /// \brief Return the attribute's value as a string. This requires the + /// attribute to be a string attribute. + StringRef getValueAsString() const; /// \brief Returns the alignment field of an attribute as a byte alignment /// value. @@ -130,165 +185,137 @@ public: /// alignment value. unsigned getStackAlignment() const; - /// \brief Equality and non-equality query methods. - bool operator==(AttrKind K) const; - bool operator!=(AttrKind K) const; + /// \brief Returns the number of dereferenceable bytes from the + /// dereferenceable attribute (or zero if unknown). + uint64_t getDereferenceableBytes() const; + + /// \brief Returns the number of dereferenceable_or_null bytes from the + /// dereferenceable_or_null attribute (or zero if unknown). + uint64_t getDereferenceableOrNullBytes() const; + + /// \brief The Attribute is converted to a string of equivalent mnemonic. This + /// is, presumably, for writing out the mnemonics for the assembly writer. + std::string getAsString(bool InAttrGrp = false) const; + /// \brief Equality and non-equality operators. bool operator==(Attribute A) const { return pImpl == A.pImpl; } bool operator!=(Attribute A) const { return pImpl != A.pImpl; } /// \brief Less-than operator. Useful for sorting the attributes list. bool operator<(Attribute A) const; - /// \brief The Attribute is converted to a string of equivalent mnemonic. This - /// is, presumably, for writing out the mnemonics for the assembly writer. - std::string getAsString() const; - void Profile(FoldingSetNodeID &ID) const { ID.AddPointer(pImpl); } - - uint64_t Raw() const; -}; - -//===----------------------------------------------------------------------===// -/// \class -/// \brief Provide DenseMapInfo for Attribute::AttrKinds. This is used by -/// AttrBuilder. -template<> struct DenseMapInfo { - static inline Attribute::AttrKind getEmptyKey() { - return Attribute::AttrKindEmptyKey; - } - static inline Attribute::AttrKind getTombstoneKey() { - return Attribute::AttrKindTombstoneKey; - } - static unsigned getHashValue(const Attribute::AttrKind &Val) { - return Val * 37U; - } - static bool isEqual(const Attribute::AttrKind &LHS, - const Attribute::AttrKind &RHS) { - return LHS == RHS; - } }; -//===----------------------------------------------------------------------===// -// AttributeSet Smart Pointer -//===----------------------------------------------------------------------===// - -class AttrBuilder; -class AttributeSetImpl; - //===----------------------------------------------------------------------===// /// \class -/// \brief This is just a pair of values to associate a set of attributes with -/// an index. -struct AttributeWithIndex { - Attribute Attrs; ///< The attributes that are set, or'd together. - unsigned Index; ///< Index of the parameter for which the attributes apply. - - static AttributeWithIndex get(unsigned Idx, Attribute Attrs) { - AttributeWithIndex P; - P.Index = Idx; - P.Attrs = Attrs; - return P; - } -}; - -//===----------------------------------------------------------------------===// -/// \class -/// \brief This class manages the ref count for the opaque AttributeSetImpl -/// object and provides accessors for it. +/// \brief This class holds the attributes for a function, its return value, and +/// its parameters. You access the attributes for each of them via an index into +/// the AttributeSet object. The function attributes are at index +/// `AttributeSet::FunctionIndex', the return value is at index +/// `AttributeSet::ReturnIndex', and the attributes for the parameters start at +/// index `1'. class AttributeSet { public: - enum AttrIndex { + enum AttrIndex : unsigned { ReturnIndex = 0U, FunctionIndex = ~0U }; private: friend class AttrBuilder; friend class AttributeSetImpl; + template friend struct DenseMapInfo; - /// \brief The attributes that we are managing. This can be null to represent + /// \brief The attributes that we are managing. This can be null to represent /// the empty attributes list. AttributeSetImpl *pImpl; - /// \brief The attributes for the specified index are returned. Attributes - /// for the result are denoted with Idx = 0. - Attribute getAttributes(uint64_t Idx) const; + /// \brief The attributes for the specified index are returned. + AttributeSetNode *getAttributes(unsigned Index) const; - /// \brief Add the specified attribute at the specified index to this - /// attribute list. Since attribute lists are immutable, this returns the new - /// list. - AttributeSet addAttr(LLVMContext &C, unsigned Idx, Attribute Attrs) const; + /// \brief Create an AttributeSet with the specified parameters in it. + static AttributeSet get(LLVMContext &C, + ArrayRef > Attrs); + static AttributeSet get(LLVMContext &C, + ArrayRef > Attrs); - /// \brief Remove the specified attribute at the specified index from this - /// attribute list. Since attribute lists are immutable, this returns the new - /// list. - AttributeSet removeAttr(LLVMContext &C, unsigned Idx, Attribute Attrs) const; + static AttributeSet getImpl(LLVMContext &C, + ArrayRef > Attrs); - /// \brief Create an AttributeSet from the AttributeWithIndex structures. - /// N.B. this is only temporary. It will be disappearing in the future. - static AttributeSet get(LLVMContext &C, ArrayRef Attrs); explicit AttributeSet(AttributeSetImpl *LI) : pImpl(LI) {} public: - AttributeSet() : pImpl(0) {} - AttributeSet(const AttributeSet &P) : pImpl(P.pImpl) {} - const AttributeSet &operator=(const AttributeSet &RHS) { - pImpl = RHS.pImpl; - return *this; - } + AttributeSet() : pImpl(nullptr) {} //===--------------------------------------------------------------------===// - // Attribute List Construction and Mutation + // AttributeSet Construction and Mutation //===--------------------------------------------------------------------===// /// \brief Return an AttributeSet with the specified parameters in it. static AttributeSet get(LLVMContext &C, ArrayRef Attrs); - static AttributeSet get(LLVMContext &C, unsigned Idx, + static AttributeSet get(LLVMContext &C, unsigned Index, ArrayRef Kind); - static AttributeSet get(LLVMContext &C, unsigned Idx, AttrBuilder &B); + static AttributeSet get(LLVMContext &C, unsigned Index, const AttrBuilder &B); - /// \brief Add an attribute to the attribute set at the given index. Since + /// \brief Add an attribute to the attribute set at the given index. Because /// attribute sets are immutable, this returns a new set. - AttributeSet addAttribute(LLVMContext &C, unsigned Idx, + AttributeSet addAttribute(LLVMContext &C, unsigned Index, Attribute::AttrKind Attr) const; - /// \brief Add attributes to the attribute set at the given index. Since + /// \brief Add an attribute to the attribute set at the given index. Because /// attribute sets are immutable, this returns a new set. - AttributeSet addAttributes(LLVMContext &C, unsigned Idx, - AttributeSet Attrs) const; + AttributeSet addAttribute(LLVMContext &C, unsigned Index, + StringRef Kind) const; + AttributeSet addAttribute(LLVMContext &C, unsigned Index, + StringRef Kind, StringRef Value) const; - /// \brief Add return attributes to this attribute set. Since attribute sets - /// are immutable, this returns a new set. - AttributeSet addRetAttributes(LLVMContext &C, AttributeSet Attrs) const { - return addAttributes(C, ReturnIndex, Attrs); - } - - /// \brief Add function attributes to this attribute set. Since attribute sets - /// are immutable, this returns a new set. - AttributeSet addFnAttributes(LLVMContext &C, AttributeSet Attrs) const { - return addAttributes(C, FunctionIndex, Attrs); - } + /// \brief Add attributes to the attribute set at the given index. Because + /// attribute sets are immutable, this returns a new set. + AttributeSet addAttributes(LLVMContext &C, unsigned Index, + AttributeSet Attrs) const; /// \brief Remove the specified attribute at the specified index from this - /// attribute list. Since attribute lists are immutable, this returns the new - /// list. - AttributeSet removeAttribute(LLVMContext &C, unsigned Idx, + /// attribute list. Because attribute lists are immutable, this returns the + /// new list. + AttributeSet removeAttribute(LLVMContext &C, unsigned Index, Attribute::AttrKind Attr) const; /// \brief Remove the specified attributes at the specified index from this - /// attribute list. Since attribute lists are immutable, this returns the new - /// list. - AttributeSet removeAttributes(LLVMContext &C, unsigned Idx, + /// attribute list. Because attribute lists are immutable, this returns the + /// new list. + AttributeSet removeAttributes(LLVMContext &C, unsigned Index, AttributeSet Attrs) const; + /// \brief Remove the specified attributes at the specified index from this + /// attribute list. Because attribute lists are immutable, this returns the + /// new list. + AttributeSet removeAttributes(LLVMContext &C, unsigned Index, + const AttrBuilder &Attrs) const; + + /// \brief Add the dereferenceable attribute to the attribute set at the given + /// index. Because attribute sets are immutable, this returns a new set. + AttributeSet addDereferenceableAttr(LLVMContext &C, unsigned Index, + uint64_t Bytes) const; + + /// \brief Add the dereferenceable_or_null attribute to the attribute set at + /// the given index. Because attribute sets are immutable, this returns a new + /// set. + AttributeSet addDereferenceableOrNullAttr(LLVMContext &C, unsigned Index, + uint64_t Bytes) const; + //===--------------------------------------------------------------------===// - // Attribute List Accessors + // AttributeSet Accessors //===--------------------------------------------------------------------===// + /// \brief Retrieve the LLVM context. + LLVMContext &getContext() const; + /// \brief The attributes for the specified index are returned. - AttributeSet getParamAttributes(unsigned Idx) const; + AttributeSet getParamAttributes(unsigned Index) const; /// \brief The attributes for the ret value are returned. AttributeSet getRetAttributes() const; @@ -296,30 +323,45 @@ public: /// \brief The function attributes are returned. AttributeSet getFnAttributes() const; - /// \brief Return the alignment for the specified function parameter. - unsigned getParamAlignment(uint64_t Idx) const; + /// \brief Return true if the attribute exists at the given index. + bool hasAttribute(unsigned Index, Attribute::AttrKind Kind) const; /// \brief Return true if the attribute exists at the given index. - bool hasAttribute(uint64_t Index, Attribute::AttrKind Kind) const; + bool hasAttribute(unsigned Index, StringRef Kind) const; /// \brief Return true if attribute exists at the given index. - bool hasAttributes(uint64_t Index) const; + bool hasAttributes(unsigned Index) const; - /// \brief Returns the alignment field of an attribute as a byte alignment - /// value. - unsigned getAlignment(uint64_t Index) const; + /// \brief Return true if the specified attribute is set for at least one + /// parameter or for the return value. + bool hasAttrSomewhere(Attribute::AttrKind Attr) const; + + /// \brief Return the attribute object that exists at the given index. + Attribute getAttribute(unsigned Index, Attribute::AttrKind Kind) const; + + /// \brief Return the attribute object that exists at the given index. + Attribute getAttribute(unsigned Index, StringRef Kind) const; + + /// \brief Return the alignment for the specified function parameter. + unsigned getParamAlignment(unsigned Index) const; /// \brief Get the stack alignment. - unsigned getStackAlignment(uint64_t Index) const; + unsigned getStackAlignment(unsigned Index) const; + + /// \brief Get the number of dereferenceable bytes (or zero if unknown). + uint64_t getDereferenceableBytes(unsigned Index) const; + + /// \brief Get the number of dereferenceable_or_null bytes (or zero if + /// unknown). + uint64_t getDereferenceableOrNullBytes(unsigned Index) const; /// \brief Return the attributes at the index as a string. - std::string getAsString(uint64_t Index) const; + std::string getAsString(unsigned Index, bool InAttrGrp = false) const; - uint64_t Raw(uint64_t Index) const; + typedef ArrayRef::iterator iterator; - /// \brief Return true if the specified attribute is set for at least one - /// parameter or for the return value. - bool hasAttrSomewhere(Attribute::AttrKind Attr) const; + iterator begin(unsigned Slot) const; + iterator end(unsigned Slot) const; /// operator==/!= - Provide equality predicates. bool operator==(const AttributeSet &RHS) const { @@ -330,21 +372,20 @@ public: } //===--------------------------------------------------------------------===// - // Attribute List Introspection + // AttributeSet Introspection //===--------------------------------------------------------------------===// + // FIXME: Remove this. + uint64_t Raw(unsigned Index) const; + /// \brief Return a raw pointer that uniquely identifies this attribute list. void *getRawPointer() const { return pImpl; } - // Attributes are stored as a dense set of slots, where there is one slot for - // each argument that has an attribute. This allows walking over the dense - // set instead of walking the sparse list of attributes. - /// \brief Return true if there are no attributes. bool isEmpty() const { - return pImpl == 0; + return getNumSlots() == 0; } /// \brief Return the number of slots used in this attribute list. This is @@ -353,7 +394,7 @@ public: unsigned getNumSlots() const; /// \brief Return the index for the given slot. - uint64_t getSlotIndex(unsigned Slot) const; + unsigned getSlotIndex(unsigned Slot) const; /// \brief Return the attributes at the given slot. AttributeSet getSlotAttributes(unsigned Slot) const; @@ -361,6 +402,27 @@ public: void dump() const; }; +//===----------------------------------------------------------------------===// +/// \class +/// \brief Provide DenseMapInfo for AttributeSet. +template<> struct DenseMapInfo { + static inline AttributeSet getEmptyKey() { + uintptr_t Val = static_cast(-1); + Val <<= PointerLikeTypeTraits::NumLowBitsAvailable; + return AttributeSet(reinterpret_cast(Val)); + } + static inline AttributeSet getTombstoneKey() { + uintptr_t Val = static_cast(-2); + Val <<= PointerLikeTypeTraits::NumLowBitsAvailable; + return AttributeSet(reinterpret_cast(Val)); + } + static unsigned getHashValue(AttributeSet AS) { + return (unsigned((uintptr_t)AS.pImpl) >> 4) ^ + (unsigned((uintptr_t)AS.pImpl) >> 9); + } + static bool isEqual(AttributeSet LHS, AttributeSet RHS) { return LHS == RHS; } +}; + //===----------------------------------------------------------------------===// /// \class /// \brief This class is used in conjunction with the Attribute::get method to @@ -368,16 +430,25 @@ public: /// value, however, is not. So this can be used as a quick way to test for /// equality, presence of attributes, etc. class AttrBuilder { - DenseSet Attrs; + std::bitset Attrs; + std::map TargetDepAttrs; uint64_t Alignment; uint64_t StackAlignment; + uint64_t DerefBytes; + uint64_t DerefOrNullBytes; public: - AttrBuilder() : Alignment(0), StackAlignment(0) {} - explicit AttrBuilder(uint64_t B) : Alignment(0), StackAlignment(0) { - addRawValue(B); + AttrBuilder() + : Attrs(0), Alignment(0), StackAlignment(0), DerefBytes(0), + DerefOrNullBytes(0) {} + explicit AttrBuilder(uint64_t Val) + : Attrs(0), Alignment(0), StackAlignment(0), DerefBytes(0), + DerefOrNullBytes(0) { + addRawValue(Val); } - AttrBuilder(const Attribute &A) : Alignment(0), StackAlignment(0) { - addAttributes(A); + AttrBuilder(const Attribute &A) + : Attrs(0), Alignment(0), StackAlignment(0), DerefBytes(0), + DerefOrNullBytes(0) { + addAttribute(A); } AttrBuilder(AttributeSet AS, unsigned Idx); @@ -386,24 +457,47 @@ public: /// \brief Add an attribute to the builder. AttrBuilder &addAttribute(Attribute::AttrKind Val); + /// \brief Add the Attribute object to the builder. + AttrBuilder &addAttribute(Attribute A); + + /// \brief Add the target-dependent attribute to the builder. + AttrBuilder &addAttribute(StringRef A, StringRef V = StringRef()); + /// \brief Remove an attribute from the builder. AttrBuilder &removeAttribute(Attribute::AttrKind Val); - /// \brief Add the attributes from A to the builder. - AttrBuilder &addAttributes(const Attribute &A); + /// \brief Remove the attributes from the builder. + AttrBuilder &removeAttributes(AttributeSet A, uint64_t Index); + + /// \brief Remove the target-dependent attribute to the builder. + AttrBuilder &removeAttribute(StringRef A); + + /// \brief Add the attributes from the builder. + AttrBuilder &merge(const AttrBuilder &B); - /// \brief Remove the attributes from A from the builder. - AttrBuilder &removeAttributes(const Attribute &A); + /// \brief Remove the attributes from the builder. + AttrBuilder &remove(const AttrBuilder &B); + + /// \brief Return true if the builder has any attribute that's in the + /// specified builder. + bool overlaps(const AttrBuilder &B) const; /// \brief Return true if the builder has the specified attribute. - bool contains(Attribute::AttrKind A) const; + bool contains(Attribute::AttrKind A) const { + assert((unsigned)A < Attribute::EndAttrKinds && "Attribute out of range!"); + return Attrs[A]; + } + + /// \brief Return true if the builder has the specified target-dependent + /// attribute. + bool contains(StringRef A) const; /// \brief Return true if the builder has IR-level attributes. bool hasAttributes() const; /// \brief Return true if the builder has any attribute that's in the /// specified attribute. - bool hasAttributes(const Attribute &A) const; + bool hasAttributes(AttributeSet A, uint64_t Index) const; /// \brief Return true if the builder has an alignment attribute. bool hasAlignmentAttr() const; @@ -414,6 +508,14 @@ public: /// \brief Retrieve the stack alignment attribute, if it exists. uint64_t getStackAlignment() const { return StackAlignment; } + /// \brief Retrieve the number of dereferenceable bytes, if the dereferenceable + /// attribute exists (zero is returned otherwise). + uint64_t getDereferenceableBytes() const { return DerefBytes; } + + /// \brief Retrieve the number of dereferenceable_or_null bytes, if the + /// dereferenceable_or_null attribute exists (zero is returned otherwise). + uint64_t getDereferenceableOrNullBytes() const { return DerefOrNullBytes; } + /// \brief This turns an int alignment (which must be a power of 2) into the /// form used internally in Attribute. AttrBuilder &addAlignmentAttr(unsigned Align); @@ -422,68 +524,53 @@ public: /// the form used internally in Attribute. AttrBuilder &addStackAlignmentAttr(unsigned Align); - typedef DenseSet::iterator iterator; - typedef DenseSet::const_iterator const_iterator; + /// \brief This turns the number of dereferenceable bytes into the form used + /// internally in Attribute. + AttrBuilder &addDereferenceableAttr(uint64_t Bytes); - iterator begin() { return Attrs.begin(); } - iterator end() { return Attrs.end(); } + /// \brief This turns the number of dereferenceable_or_null bytes into the + /// form used internally in Attribute. + AttrBuilder &addDereferenceableOrNullAttr(uint64_t Bytes); - const_iterator begin() const { return Attrs.begin(); } - const_iterator end() const { return Attrs.end(); } + /// \brief Return true if the builder contains no target-independent + /// attributes. + bool empty() const { return Attrs.none(); } - /// \brief Add the raw value to the internal representation. - /// - /// N.B. This should be used ONLY for decoding LLVM bitcode! - AttrBuilder &addRawValue(uint64_t Val); + // Iterators for target-dependent attributes. + typedef std::pair td_type; + typedef std::map::iterator td_iterator; + typedef std::map::const_iterator td_const_iterator; + typedef llvm::iterator_range td_range; + typedef llvm::iterator_range td_const_range; - /// \brief Remove attributes that are used on functions only. - void removeFunctionOnlyAttrs() { - removeAttribute(Attribute::NoReturn) - .removeAttribute(Attribute::NoUnwind) - .removeAttribute(Attribute::ReadNone) - .removeAttribute(Attribute::ReadOnly) - .removeAttribute(Attribute::NoInline) - .removeAttribute(Attribute::AlwaysInline) - .removeAttribute(Attribute::OptimizeForSize) - .removeAttribute(Attribute::StackProtect) - .removeAttribute(Attribute::StackProtectReq) - .removeAttribute(Attribute::StackProtectStrong) - .removeAttribute(Attribute::NoRedZone) - .removeAttribute(Attribute::NoImplicitFloat) - .removeAttribute(Attribute::Naked) - .removeAttribute(Attribute::InlineHint) - .removeAttribute(Attribute::StackAlignment) - .removeAttribute(Attribute::UWTable) - .removeAttribute(Attribute::NonLazyBind) - .removeAttribute(Attribute::ReturnsTwice) - .removeAttribute(Attribute::AddressSafety) - .removeAttribute(Attribute::MinSize) - .removeAttribute(Attribute::NoDuplicate); + td_iterator td_begin() { return TargetDepAttrs.begin(); } + td_iterator td_end() { return TargetDepAttrs.end(); } + + td_const_iterator td_begin() const { return TargetDepAttrs.begin(); } + td_const_iterator td_end() const { return TargetDepAttrs.end(); } + + td_range td_attrs() { return td_range(td_begin(), td_end()); } + td_const_range td_attrs() const { + return td_const_range(td_begin(), td_end()); } - uint64_t Raw() const; + bool td_empty() const { return TargetDepAttrs.empty(); } bool operator==(const AttrBuilder &B); bool operator!=(const AttrBuilder &B) { return !(*this == B); } + + // FIXME: Remove this in 4.0. + + /// \brief Add the raw value to the internal representation. + AttrBuilder &addRawValue(uint64_t Val); }; namespace AttributeFuncs { /// \brief Which attributes cannot be applied to a type. -Attribute typeIncompatible(Type *Ty); - -/// \brief This returns an integer containing an encoding of all the LLVM -/// attributes found in the given attribute bitset. Any change to this encoding -/// is a breaking change to bitcode compatibility. -uint64_t encodeLLVMAttributesForBitcode(AttributeSet Attrs, unsigned Index); - -/// \brief This returns an attribute bitset containing the LLVM attributes that -/// have been decoded from the given integer. This function must stay in sync -/// with 'encodeLLVMAttributesForBitcode'. -Attribute decodeLLVMAttributesForBitcode(LLVMContext &C, - uint64_t EncodedAttrs); +AttrBuilder typeIncompatible(const Type *Ty); } // end AttributeFuncs namespace