X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FAttributes.h;h=ed18ca4c403ea42b42a6ef997108a19c6d2c8e84;hb=b09c146b116359616f6cbd4c8b3328607e00ff42;hp=c9589603f9a52083888a7e922194ead84a837131;hpb=6eec6ffb9b4ffed8aa07f051fd35466c424a3d8c;p=oota-llvm.git diff --git a/include/llvm/Attributes.h b/include/llvm/Attributes.h index c9589603f9a..ed18ca4c403 100644 --- a/include/llvm/Attributes.h +++ b/include/llvm/Attributes.h @@ -15,460 +15,280 @@ #ifndef LLVM_ATTRIBUTES_H #define LLVM_ATTRIBUTES_H -#include "llvm/Support/MathExtras.h" #include "llvm/ADT/ArrayRef.h" +#include "llvm/Support/MathExtras.h" #include #include namespace llvm { +class AttrBuilder; +class AttributesImpl; class LLVMContext; class Type; -namespace Attribute { - -/// We use this proxy POD type to allow constructing Attributes constants using -/// initializer lists. Do not use this class directly. -struct AttrConst { - uint64_t v; - AttrConst operator | (const AttrConst Attrs) const { - AttrConst Res = {v | Attrs.v}; - return Res; - } - AttrConst operator ~ () const { - AttrConst Res = {~v}; - return Res; - } -}; - -/// Function parameters and results can have attributes to indicate how they -/// should be treated by optimizations and code generation. This enumeration -/// lists the attributes that can be associated with parameters, function -/// results or the function itself. -/// @brief Function attributes. - -/// We declare AttrConst objects that will be used throughout the code and also -/// raw uint64_t objects with _i suffix to be used below for other constant -/// declarations. This is done to avoid static CTORs and at the same time to -/// keep type-safety of Attributes. -#define DECLARE_LLVM_ATTRIBUTE(name, value) \ - const uint64_t name##_i = value; \ - const AttrConst name = {value}; - -DECLARE_LLVM_ATTRIBUTE(None,0) ///< No attributes have been set -DECLARE_LLVM_ATTRIBUTE(ZExt,1<<0) ///< Zero extended before/after call -DECLARE_LLVM_ATTRIBUTE(SExt,1<<1) ///< Sign extended before/after call -DECLARE_LLVM_ATTRIBUTE(NoReturn,1<<2) ///< Mark the function as not returning -DECLARE_LLVM_ATTRIBUTE(InReg,1<<3) ///< Force argument to be passed in register -DECLARE_LLVM_ATTRIBUTE(StructRet,1<<4) ///< Hidden pointer to structure to return -DECLARE_LLVM_ATTRIBUTE(NoUnwind,1<<5) ///< Function doesn't unwind stack -DECLARE_LLVM_ATTRIBUTE(NoAlias,1<<6) ///< Considered to not alias after call -DECLARE_LLVM_ATTRIBUTE(ByVal,1<<7) ///< Pass structure by value -DECLARE_LLVM_ATTRIBUTE(Nest,1<<8) ///< Nested function static chain -DECLARE_LLVM_ATTRIBUTE(ReadNone,1<<9) ///< Function does not access memory -DECLARE_LLVM_ATTRIBUTE(ReadOnly,1<<10) ///< Function only reads from memory -DECLARE_LLVM_ATTRIBUTE(NoInline,1<<11) ///< inline=never -DECLARE_LLVM_ATTRIBUTE(AlwaysInline,1<<12) ///< inline=always -DECLARE_LLVM_ATTRIBUTE(OptimizeForSize,1<<13) ///< opt_size -DECLARE_LLVM_ATTRIBUTE(StackProtect,1<<14) ///< Stack protection. -DECLARE_LLVM_ATTRIBUTE(StackProtectReq,1<<15) ///< Stack protection required. -DECLARE_LLVM_ATTRIBUTE(Alignment,31<<16) ///< Alignment of parameter (5 bits) - // stored as log2 of alignment with +1 bias - // 0 means unaligned different from align 1 -DECLARE_LLVM_ATTRIBUTE(NoCapture,1<<21) ///< Function creates no aliases of pointer -DECLARE_LLVM_ATTRIBUTE(NoRedZone,1<<22) /// disable redzone -DECLARE_LLVM_ATTRIBUTE(NoImplicitFloat,1<<23) /// disable implicit floating point - /// instructions. -DECLARE_LLVM_ATTRIBUTE(Naked,1<<24) ///< Naked function -DECLARE_LLVM_ATTRIBUTE(InlineHint,1<<25) ///< source said inlining was - ///desirable -DECLARE_LLVM_ATTRIBUTE(StackAlignment,7<<26) ///< Alignment of stack for - ///function (3 bits) stored as log2 - ///of alignment with +1 bias - ///0 means unaligned (different from - ///alignstack= {1)) -DECLARE_LLVM_ATTRIBUTE(ReturnsTwice,1<<29) ///< Function can return twice -DECLARE_LLVM_ATTRIBUTE(UWTable,1<<30) ///< Function must be in a unwind - ///table -DECLARE_LLVM_ATTRIBUTE(NonLazyBind,1U<<31) ///< Function is called early and/or - /// often, so lazy binding isn't - /// worthwhile. -DECLARE_LLVM_ATTRIBUTE(AddressSafety,1ULL<<32) ///< Address safety checking is on. - -#undef DECLARE_LLVM_ATTRIBUTE - -/// Note that 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. -/// 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: -/// nil = Needs an entry because an exception might pass by. -/// nounwind = No need for an entry -/// uwtable = Needs an entry because the ABI says so and because -/// an exception might pass by. -/// uwtable + nounwind = Needs an entry because the ABI says so. - -/// @brief Attributes that only apply to function parameters. -const AttrConst ParameterOnly = {ByVal_i | Nest_i | - StructRet_i | NoCapture_i}; - -/// @brief Attributes that may be applied to the function itself. These cannot -/// be used on return values or function parameters. -const AttrConst FunctionOnly = {NoReturn_i | NoUnwind_i | ReadNone_i | - ReadOnly_i | NoInline_i | AlwaysInline_i | OptimizeForSize_i | - StackProtect_i | StackProtectReq_i | NoRedZone_i | NoImplicitFloat_i | - Naked_i | InlineHint_i | StackAlignment_i | - UWTable_i | NonLazyBind_i | ReturnsTwice_i | AddressSafety_i}; - -/// @brief Parameter attributes that do not apply to vararg call arguments. -const AttrConst VarArgsIncompatible = {StructRet_i}; - -/// @brief Attributes that are mutually incompatible. -const AttrConst MutuallyIncompatible[5] = { - {ByVal_i | Nest_i | StructRet_i}, - {ByVal_i | Nest_i | InReg_i }, - {ZExt_i | SExt_i}, - {ReadNone_i | ReadOnly_i}, - {NoInline_i | AlwaysInline_i} -}; - -} // namespace Attribute - -/// AttributeImpl - The internal representation of the Attributes class. This is -/// uniquified. -class AttributesImpl; - /// Attributes - A bitset of attributes. class Attributes { - // Currently, we need less than 64 bits. - uint64_t Bits; - - explicit Attributes(AttributesImpl *A); public: - Attributes() : Bits(0) {} - explicit Attributes(uint64_t Val) : Bits(Val) {} - /*implicit*/ Attributes(Attribute::AttrConst Val) : Bits(Val.v) {} - - class Builder { - friend class Attributes; - uint64_t Bits; - public: - Builder() : Bits(0) {} - Builder(const Attributes &A) : Bits(A.Bits) {} - - void addZExtAttr() { - Bits |= Attribute::ZExt_i; - } - void addSExtAttr() { - Bits |= Attribute::SExt_i; - } - void addNoReturnAttr() { - Bits |= Attribute::NoReturn_i; - } - void addInRegAttr() { - Bits |= Attribute::InReg_i; - } - void addStructRetAttr() { - Bits |= Attribute::StructRet_i; - } - void addNoUnwindAttr() { - Bits |= Attribute::NoUnwind_i; - } - void addNoAliasAttr() { - Bits |= Attribute::NoAlias_i; - } - void addByValAttr() { - Bits |= Attribute::ByVal_i; - } - void addNestAttr() { - Bits |= Attribute::Nest_i; - } - void addReadNoneAttr() { - Bits |= Attribute::ReadNone_i; - } - void addReadOnlyAttr() { - Bits |= Attribute::ReadOnly_i; - } - void addNoInlineAttr() { - Bits |= Attribute::NoInline_i; - } - void addAlwaysInlineAttr() { - Bits |= Attribute::AlwaysInline_i; - } - void addOptimizeForSizeAttr() { - Bits |= Attribute::OptimizeForSize_i; - } - void addStackProtectAttr() { - Bits |= Attribute::StackProtect_i; - } - void addStackProtectReqAttr() { - Bits |= Attribute::StackProtectReq_i; - } - void addNoCaptureAttr() { - Bits |= Attribute::NoCapture_i; - } - void addNoRedZoneAttr() { - Bits |= Attribute::NoRedZone_i; - } - void addNoImplicitFloatAttr() { - Bits |= Attribute::NoImplicitFloat_i; - } - void addNakedAttr() { - Bits |= Attribute::Naked_i; - } - void addInlineHintAttr() { - Bits |= Attribute::InlineHint_i; - } - void addReturnsTwiceAttr() { - Bits |= Attribute::ReturnsTwice_i; - } - void addUWTableAttr() { - Bits |= Attribute::UWTable_i; - } - void addNonLazyBindAttr() { - Bits |= Attribute::NonLazyBind_i; - } - void addAddressSafetyAttr() { - Bits |= Attribute::AddressSafety_i; - } - void addAlignmentAttr(unsigned Align) { - if (Align == 0) return; - assert(isPowerOf2_32(Align) && "Alignment must be a power of two."); - assert(Align <= 0x40000000 && "Alignment too large."); - Bits |= (Log2_32(Align) + 1) << 16; - } - void addStackAlignmentAttr(unsigned Align) { - // Default alignment, allow the target to define how to align it. - if (Align == 0) return; - - assert(isPowerOf2_32(Align) && "Alignment must be a power of two."); - assert(Align <= 0x100 && "Alignment too large."); - Bits |= (Log2_32(Align) + 1) << 26; - } + /// Function parameters and results can have attributes to indicate how they + /// should be treated by optimizations and code generation. This enumeration + /// lists the attributes that can be associated with parameters, function + /// results or the function itself. + /// + /// Note that 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. + /// + /// 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: + /// + /// nil = Needs an entry because an exception might pass by. + /// nounwind = No need for an entry + /// uwtable = Needs an entry because the ABI says so and because + /// an exception might pass by. + /// uwtable + nounwind = Needs an entry because the ABI says so. + + enum AttrVal { + // 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 + ByVal, ///< Pass structure by value + InlineHint, ///< Source said inlining was desirable + InReg, ///< Force argument to be passed in register + MinSize, ///< Function must be optimized for size first + Naked, ///< Naked function + Nest, ///< Nested function static chain + NoAlias, ///< Considered to not alias after call + NoCapture, ///< Function creates no aliases of pointer + NoImplicitFloat, ///< Disable implicit floating point insts + NoInline, ///< inline=never + NonLazyBind, ///< Function is called early and/or + ///< often, so lazy binding isn't worthwhile + NoRedZone, ///< Disable redzone + NoReturn, ///< Mark the function as not returning + NoUnwind, ///< Function doesn't unwind stack + OptimizeForSize, ///< opt_size + ReadNone, ///< Function does not access memory + ReadOnly, ///< Function only reads from memory + ReturnsTwice, ///< Function can return twice + SExt, ///< Sign extended before/after call + StackAlignment, ///< Alignment of stack for function (3 bits) + ///< stored as log2 of alignment with +1 bias 0 + ///< means unaligned (different from + ///< alignstack={1)) + StackProtect, ///< Stack protection. + StackProtectReq, ///< Stack protection required. + StructRet, ///< Hidden pointer to structure to return + UWTable, ///< Function must be in a unwind table + ZExt ///< Zero extended before/after call }; +private: + AttributesImpl *Attrs; + Attributes(AttributesImpl *A) : Attrs(A) {} +public: + Attributes() : Attrs(0) {} /// get - Return a uniquified Attributes object. This takes the uniquified /// value from the Builder and wraps it in the Attributes class. - static Attributes get(LLVMContext &Context, Builder &B); + static Attributes get(LLVMContext &Context, ArrayRef Vals); + static Attributes get(LLVMContext &Context, AttrBuilder &B); - // Attribute query methods. - // FIXME: StackAlignment & Alignment attributes have no predicate methods. - bool hasAttributes() const { - return Bits != 0; - } - bool hasAttributes(const Attributes &A) const { - return Bits & A.Bits; - } + /// @brief Return true if the attribute is present. + bool hasAttribute(AttrVal Val) const; - bool hasZExtAttr() const { - return Bits & Attribute::ZExt_i; - } - bool hasSExtAttr() const { - return Bits & Attribute::SExt_i; - } - bool hasNoReturnAttr() const { - return Bits & Attribute::NoReturn_i; - } - bool hasInRegAttr() const { - return Bits & Attribute::InReg_i; - } - bool hasStructRetAttr() const { - return Bits & Attribute::StructRet_i; - } - bool hasNoUnwindAttr() const { - return Bits & Attribute::NoUnwind_i; - } - bool hasNoAliasAttr() const { - return Bits & Attribute::NoAlias_i; - } - bool hasByValAttr() const { - return Bits & Attribute::ByVal_i; - } - bool hasNestAttr() const { - return Bits & Attribute::Nest_i; - } - bool hasReadNoneAttr() const { - return Bits & Attribute::ReadNone_i; - } - bool hasReadOnlyAttr() const { - return Bits & Attribute::ReadOnly_i; - } - bool hasNoInlineAttr() const { - return Bits & Attribute::NoInline_i; - } - bool hasAlwaysInlineAttr() const { - return Bits & Attribute::AlwaysInline_i; - } - bool hasOptimizeForSizeAttr() const { - return Bits & Attribute::OptimizeForSize_i; - } - bool hasStackProtectAttr() const { - return Bits & Attribute::StackProtect_i; - } - bool hasStackProtectReqAttr() const { - return Bits & Attribute::StackProtectReq_i; - } - bool hasAlignmentAttr() const { - return Bits & Attribute::Alignment_i; - } - bool hasNoCaptureAttr() const { - return Bits & Attribute::NoCapture_i; - } - bool hasNoRedZoneAttr() const { - return Bits & Attribute::NoRedZone_i; - } - bool hasNoImplicitFloatAttr() const { - return Bits & Attribute::NoImplicitFloat_i; - } - bool hasNakedAttr() const { - return Bits & Attribute::Naked_i; - } - bool hasInlineHintAttr() const { - return Bits & Attribute::InlineHint_i; - } - bool hasReturnsTwiceAttr() const { - return Bits & Attribute::ReturnsTwice_i; - } - bool hasStackAlignmentAttr() const { - return Bits & Attribute::StackAlignment_i; - } - bool hasUWTableAttr() const { - return Bits & Attribute::UWTable_i; - } - bool hasNonLazyBindAttr() const { - return Bits & Attribute::NonLazyBind_i; - } - bool hasAddressSafetyAttr() const { - return Bits & Attribute::AddressSafety_i; - } + /// @brief Return true if attributes exist + bool hasAttributes() const; - /// This returns the alignment field of an attribute as a byte alignment - /// value. - unsigned getAlignment() const { - if (!hasAlignmentAttr()) - return 0; - return 1U << (((Bits & Attribute::Alignment_i) >> 16) - 1); - } + /// @brief Return true if the attributes are a non-null intersection. + bool hasAttributes(const Attributes &A) const; - /// This returns the stack alignment field of an attribute as a byte alignment + /// @brief Returns the alignment field of an attribute as a byte alignment /// value. - unsigned getStackAlignment() const { - if (!hasStackAlignmentAttr()) - return 0; - return 1U << (((Bits & Attribute::StackAlignment_i) >> 26) - 1); - } + unsigned getAlignment() const; + + /// @brief Returns the stack alignment field of an attribute as a byte + /// alignment value. + unsigned getStackAlignment() const; + + /// @brief Parameter attributes that do not apply to vararg call arguments. + bool hasIncompatibleWithVarArgsAttrs() const { + return hasAttribute(Attributes::StructRet); + } + + /// @brief Attributes that only apply to function parameters. + bool hasParameterOnlyAttrs() const { + return hasAttribute(Attributes::ByVal) || + hasAttribute(Attributes::Nest) || + hasAttribute(Attributes::StructRet) || + hasAttribute(Attributes::NoCapture); + } + + /// @brief Attributes that may be applied to the function itself. These cannot + /// be used on return values or function parameters. + bool hasFunctionOnlyAttrs() const { + return hasAttribute(Attributes::NoReturn) || + hasAttribute(Attributes::NoUnwind) || + hasAttribute(Attributes::ReadNone) || + hasAttribute(Attributes::ReadOnly) || + hasAttribute(Attributes::NoInline) || + hasAttribute(Attributes::AlwaysInline) || + hasAttribute(Attributes::OptimizeForSize) || + hasAttribute(Attributes::StackProtect) || + hasAttribute(Attributes::StackProtectReq) || + hasAttribute(Attributes::NoRedZone) || + hasAttribute(Attributes::NoImplicitFloat) || + hasAttribute(Attributes::Naked) || + hasAttribute(Attributes::InlineHint) || + hasAttribute(Attributes::StackAlignment) || + hasAttribute(Attributes::UWTable) || + hasAttribute(Attributes::NonLazyBind) || + hasAttribute(Attributes::ReturnsTwice) || + hasAttribute(Attributes::AddressSafety) || + hasAttribute(Attributes::MinSize); + } + + bool operator==(const Attributes &A) const { + return Attrs == A.Attrs; + } + bool operator!=(const Attributes &A) const { + return Attrs != A.Attrs; + } + + uint64_t Raw() const; - // This is a "safe bool() operator". - operator const void *() const { return Bits ? this : 0; } - bool isEmptyOrSingleton() const { return (Bits & (Bits - 1)) == 0; } - bool operator == (const Attributes &Attrs) const { - return Bits == Attrs.Bits; - } - bool operator != (const Attributes &Attrs) const { - return Bits != Attrs.Bits; - } - Attributes operator | (const Attributes &Attrs) const { - return Attributes(Bits | Attrs.Bits); - } - Attributes operator & (const Attributes &Attrs) const { - return Attributes(Bits & Attrs.Bits); - } - Attributes operator ^ (const Attributes &Attrs) const { - return Attributes(Bits ^ Attrs.Bits); - } - Attributes &operator |= (const Attributes &Attrs) { - Bits |= Attrs.Bits; - return *this; - } - Attributes &operator &= (const Attributes &Attrs) { - Bits &= Attrs.Bits; - return *this; - } - Attributes operator ~ () const { return Attributes(~Bits); } - uint64_t Raw() const { return Bits; } + /// @brief Which attributes cannot be applied to a type. + static Attributes typeIncompatible(Type *Ty); - /// This turns an int alignment (a power of 2, normally) into the form used - /// internally in Attributes. - static Attributes constructAlignmentFromInt(unsigned i) { - // Default alignment, allow the target to define how to align it. - if (i == 0) - return Attribute::None; + /// encodeLLVMAttributesForBitcode - 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. + static uint64_t encodeLLVMAttributesForBitcode(Attributes Attrs); - assert(isPowerOf2_32(i) && "Alignment must be a power of two."); - assert(i <= 0x40000000 && "Alignment too large."); - return Attributes((Log2_32(i)+1) << 16); - } + /// decodeLLVMAttributesForBitcode - 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'. + static Attributes decodeLLVMAttributesForBitcode(LLVMContext &C, + uint64_t EncodedAttrs); - /// This turns an int stack alignment (which must be a power of 2) into the - /// form used internally in Attributes. - static Attributes constructStackAlignmentFromInt(unsigned i) { - // Default alignment, allow the target to define how to align it. - if (i == 0) - return Attribute::None; + /// getAsString - The set of Attributes set in Attributes is converted to a + /// string of equivalent mnemonics. This is, presumably, for writing out the + /// mnemonics for the assembly writer. + /// @brief Convert attribute bits to text + std::string getAsString() const; +}; - assert(isPowerOf2_32(i) && "Alignment must be a power of two."); - assert(i <= 0x100 && "Alignment too large."); - return Attributes((Log2_32(i)+1) << 26); +//===----------------------------------------------------------------------===// +/// AttrBuilder - This class is used in conjunction with the Attributes::get +/// method to create an Attributes object. The object itself is uniquified. The +/// Builder's value, however, is not. So this can be used as a quick way to test +/// for equality, presence of attributes, etc. +class AttrBuilder { + uint64_t Bits; +public: + AttrBuilder() : Bits(0) {} + explicit AttrBuilder(uint64_t B) : Bits(B) {} + AttrBuilder(const Attributes &A) : Bits(A.Raw()) {} + + void clear() { Bits = 0; } + + /// addAttribute - Add an attribute to the builder. + AttrBuilder &addAttribute(Attributes::AttrVal Val); + + /// removeAttribute - Remove an attribute from the builder. + AttrBuilder &removeAttribute(Attributes::AttrVal Val); + + /// addAttribute - Add the attributes from A to the builder. + AttrBuilder &addAttributes(const Attributes &A); + + /// removeAttribute - Remove the attributes from A from the builder. + AttrBuilder &removeAttributes(const Attributes &A); + + /// hasAttribute - Return true if the builder has the specified attribute. + bool hasAttribute(Attributes::AttrVal A) const; + + /// hasAttributes - Return true if the builder has IR-level attributes. + bool hasAttributes() const; + + /// hasAttributes - Return true if the builder has any attribute that's in the + /// specified attribute. + bool hasAttributes(const Attributes &A) const; + + /// hasAlignmentAttr - Return true if the builder has an alignment attribute. + bool hasAlignmentAttr() const; + + /// getAlignment - Retrieve the alignment attribute, if it exists. + uint64_t getAlignment() const; + + /// getStackAlignment - Retrieve the stack alignment attribute, if it exists. + uint64_t getStackAlignment() const; + + /// addAlignmentAttr - This turns an int alignment (which must be a power of + /// 2) into the form used internally in Attributes. + AttrBuilder &addAlignmentAttr(unsigned Align); + + /// addStackAlignmentAttr - This turns an int stack alignment (which must be a + /// power of 2) into the form used internally in Attributes. + AttrBuilder &addStackAlignmentAttr(unsigned Align); + + /// addRawValue - Add the raw value to the internal representation. + /// N.B. This should be used ONLY for decoding LLVM bitcode! + AttrBuilder &addRawValue(uint64_t Val); + + /// @brief Remove attributes that are used on functions only. + void removeFunctionOnlyAttrs() { + removeAttribute(Attributes::NoReturn) + .removeAttribute(Attributes::NoUnwind) + .removeAttribute(Attributes::ReadNone) + .removeAttribute(Attributes::ReadOnly) + .removeAttribute(Attributes::NoInline) + .removeAttribute(Attributes::AlwaysInline) + .removeAttribute(Attributes::OptimizeForSize) + .removeAttribute(Attributes::StackProtect) + .removeAttribute(Attributes::StackProtectReq) + .removeAttribute(Attributes::NoRedZone) + .removeAttribute(Attributes::NoImplicitFloat) + .removeAttribute(Attributes::Naked) + .removeAttribute(Attributes::InlineHint) + .removeAttribute(Attributes::StackAlignment) + .removeAttribute(Attributes::UWTable) + .removeAttribute(Attributes::NonLazyBind) + .removeAttribute(Attributes::ReturnsTwice) + .removeAttribute(Attributes::AddressSafety) + .removeAttribute(Attributes::MinSize); } - /// @brief Which attributes cannot be applied to a type. - static Attributes typeIncompatible(Type *Ty); + uint64_t Raw() const { return Bits; } - /// 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. - static uint64_t encodeLLVMAttributesForBitcode(Attributes Attrs) { - // FIXME: It doesn't make sense to store the alignment information as an - // expanded out value, we should store it as a log2 value. However, we - // can't just change that here without breaking bitcode compatibility. If - // this ever becomes a problem in practice, we should introduce new tag - // numbers in the bitcode file and have those tags use a more efficiently - // encoded alignment field. - - // Store the alignment in the bitcode as a 16-bit raw value instead of a - // 5-bit log2 encoded value. Shift the bits above the alignment up by 11 - // bits. - uint64_t EncodedAttrs = Attrs.Raw() & 0xffff; - if (Attrs.hasAlignmentAttr()) - EncodedAttrs |= (1ULL << 16) << - (((Attrs.Bits & Attribute::Alignment_i) - 1) >> 16); - EncodedAttrs |= (Attrs.Raw() & (0xfffULL << 21)) << 11; - return EncodedAttrs; + bool operator==(const AttrBuilder &B) { + return Bits == B.Bits; } - - /// 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'. - static Attributes decodeLLVMAttributesForBitcode(uint64_t EncodedAttrs) { - // The alignment is stored as a 16-bit raw value from bits 31--16. We shift - // the bits above 31 down by 11 bits. - unsigned Alignment = (EncodedAttrs & (0xffffULL << 16)) >> 16; - assert((!Alignment || isPowerOf2_32(Alignment)) && - "Alignment must be a power of two."); - - Attributes Attrs(EncodedAttrs & 0xffff); - if (Alignment) - Attrs |= Attributes::constructAlignmentFromInt(Alignment); - Attrs |= Attributes((EncodedAttrs & (0xfffULL << 32)) >> 11); - return Attrs; + bool operator!=(const AttrBuilder &B) { + return Bits != B.Bits; } - - /// The set of Attributes set in Attributes is converted to a string of - /// equivalent mnemonics. This is, presumably, for writing out the mnemonics - /// for the assembly writer. - /// @brief Convert attribute bits to text - std::string getAsString() const; }; -/// This is just a pair of values to associate a set of attributes -/// with an index. +//===----------------------------------------------------------------------===// +// AttributeWithIndex +//===----------------------------------------------------------------------===// + +/// AttributeWithIndex - This is just a pair of values to associate a set of +/// attributes with an index. struct AttributeWithIndex { Attributes Attrs; ///< The attributes that are set, or'd together. unsigned Index; ///< Index of the parameter for which the attributes apply. ///< Index 0 is used for return value attributes. ///< Index ~0U is used for function attributes. + static AttributeWithIndex get(LLVMContext &C, unsigned Idx, + ArrayRef Attrs) { + return get(Idx, Attributes::get(C, Attrs)); + } static AttributeWithIndex get(unsigned Idx, Attributes Attrs) { AttributeWithIndex P; P.Index = Idx; @@ -478,39 +298,50 @@ struct AttributeWithIndex { }; //===----------------------------------------------------------------------===// -// AttrListPtr Smart Pointer +// AttributeSet Smart Pointer //===----------------------------------------------------------------------===// class AttributeListImpl; -/// AttrListPtr - This class manages the ref count for the opaque +/// AttributeSet - This class manages the ref count for the opaque /// AttributeListImpl object and provides accessors for it. -class AttrListPtr { - /// AttrList - The attributes that we are managing. This can be null - /// to represent the empty attributes list. +class AttributeSet { +public: + enum AttrIndex { + ReturnIndex = 0U, + FunctionIndex = ~0U + }; +private: + /// @brief The attributes that we are managing. This can be null to represent + /// the empty attributes list. AttributeListImpl *AttrList; + + /// @brief The attributes for the specified index are returned. Attributes + /// for the result are denoted with Idx = 0. + Attributes getAttributes(unsigned Idx) const; + + explicit AttributeSet(AttributeListImpl *LI) : AttrList(LI) {} public: - AttrListPtr() : AttrList(0) {} - AttrListPtr(const AttrListPtr &P); - const AttrListPtr &operator=(const AttrListPtr &RHS); - ~AttrListPtr(); + AttributeSet() : AttrList(0) {} + AttributeSet(const AttributeSet &P) : AttrList(P.AttrList) {} + const AttributeSet &operator=(const AttributeSet &RHS); //===--------------------------------------------------------------------===// // Attribute List Construction and Mutation //===--------------------------------------------------------------------===// /// get - Return a Attributes list with the specified parameters in it. - static AttrListPtr get(ArrayRef Attrs); + static AttributeSet get(LLVMContext &C, ArrayRef Attrs); /// addAttr - Add the specified attribute at the specified index to this /// attribute list. Since attribute lists are immutable, this /// returns the new list. - AttrListPtr addAttr(unsigned Idx, Attributes Attrs) const; + AttributeSet addAttr(LLVMContext &C, unsigned Idx, Attributes Attrs) const; /// removeAttr - Remove the specified attribute at the specified index from /// this attribute list. Since attribute lists are immutable, this /// returns the new list. - AttrListPtr removeAttr(unsigned Idx, Attributes Attrs) const; + AttributeSet removeAttr(LLVMContext &C, unsigned Idx, Attributes Attrs) const; //===--------------------------------------------------------------------===// // Attribute List Accessors @@ -518,19 +349,18 @@ public: /// getParamAttributes - The attributes for the specified index are /// returned. Attributes getParamAttributes(unsigned Idx) const { - assert (Idx && Idx != ~0U && "Invalid parameter index!"); return getAttributes(Idx); } /// getRetAttributes - The attributes for the ret value are /// returned. Attributes getRetAttributes() const { - return getAttributes(0); + return getAttributes(ReturnIndex); } /// getFnAttributes - The function attributes are returned. Attributes getFnAttributes() const { - return getAttributes(~0U); + return getAttributes(FunctionIndex); } /// paramHasAttr - Return true if the specified parameter index has the @@ -547,16 +377,17 @@ public: /// hasAttrSomewhere - Return true if the specified attribute is set for at /// least one parameter or for the return value. - bool hasAttrSomewhere(Attributes Attr) const; + bool hasAttrSomewhere(Attributes::AttrVal Attr) const; + + unsigned getNumAttrs() const; + Attributes &getAttributesAtIndex(unsigned i) const; /// operator==/!= - Provide equality predicates. - bool operator==(const AttrListPtr &RHS) const + bool operator==(const AttributeSet &RHS) const { return AttrList == RHS.AttrList; } - bool operator!=(const AttrListPtr &RHS) const + bool operator!=(const AttributeSet &RHS) const { return AttrList != RHS.AttrList; } - void dump() const; - //===--------------------------------------------------------------------===// // Attribute List Introspection //===--------------------------------------------------------------------===// @@ -586,13 +417,7 @@ public: /// holds a index number plus a set of attributes. const AttributeWithIndex &getSlot(unsigned Slot) const; -private: - explicit AttrListPtr(AttributeListImpl *L); - - /// getAttributes - The attributes for the specified index are - /// returned. Attributes for the result are denoted with Idx = 0. - Attributes getAttributes(unsigned Idx) const; - + void dump() const; }; } // End llvm namespace