diff options
Diffstat (limited to 'include/llvm/Attributes.h')
| -rw-r--r-- | include/llvm/Attributes.h | 305 |
1 files changed, 202 insertions, 103 deletions
diff --git a/include/llvm/Attributes.h b/include/llvm/Attributes.h index 0228d8691d..9dc2c1aa57 100644 --- a/include/llvm/Attributes.h +++ b/include/llvm/Attributes.h @@ -21,11 +21,13 @@ #include <string> namespace llvm { + class Type; namespace Attribute { -/// We use this proxy POD type to allow constructing Attributes constants -/// using initializer lists. Do not use this class directly. + +/// 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 { @@ -37,49 +39,6 @@ struct AttrConst { return Res; } }; -} // namespace Attribute - - -/// Attributes - A bitset of attributes. -class Attributes { - public: - Attributes() : Bits(0) { } - explicit Attributes(uint64_t Val) : Bits(Val) { } - /*implicit*/ Attributes(Attribute::AttrConst Val) : Bits(Val.v) { } - // 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; } - private: - // Currently, we need less than 64 bits. - uint64_t Bits; -}; - -namespace Attribute { /// Function parameters and results can have attributes to indicate how they /// should be treated by optimizations and code generation. This enumeration @@ -87,10 +46,10 @@ namespace Attribute { /// 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. +/// 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}; @@ -137,6 +96,195 @@ DECLARE_LLVM_ATTRIBUTE(AddressSafety,1ULL<<32) ///< Address safety checking is o #undef DECLARE_LLVM_ATTRIBUTE +} // namespace Attribute + +/// Attributes - A bitset of attributes. +class Attributes { + // Currently, we need less than 64 bits. + uint64_t Bits; +public: + Attributes() : Bits(0) { } + explicit Attributes(uint64_t Val) : Bits(Val) { } + /*implicit*/ Attributes(Attribute::AttrConst Val) : Bits(Val.v) { } + + // 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; + } + + 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; + } + + uint64_t getRawAlignment() const { + return Bits & Attribute::Alignment_i; + } + uint64_t getRawStackAlignment() const { + return Bits & Attribute::StackAlignment_i; + } + + /// This returns the alignment field of an attribute as a byte alignment + /// value. + unsigned getAlignment() const { + if (!hasAlignmentAttr()) + return 0; + + return 1U << ((getRawAlignment() >> 16) - 1); + } + + /// This returns the stack alignment field of an attribute as a byte alignment + /// value. + unsigned getStackAlignment() const { + if (!hasStackAlignmentAttr()) + return 0; + + return 1U << ((getRawStackAlignment() >> 26) - 1); + } + + /// 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; + + assert(isPowerOf2_32(i) && "Alignment must be a power of two."); + assert(i <= 0x40000000 && "Alignment too large."); + return Attributes((Log2_32(i)+1) << 16); + } + + /// 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; + + assert(isPowerOf2_32(i) && "Alignment must be a power of two."); + assert(i <= 0x100 && "Alignment too large."); + return Attributes((Log2_32(i)+1) << 26); + } + + // 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; } + + /// 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; +}; + +namespace 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. @@ -176,49 +324,6 @@ const AttrConst MutuallyIncompatible[5] = { /// @brief Which attributes cannot be applied to a type. Attributes typeIncompatible(Type *Ty); -/// This turns an int alignment (a power of 2, normally) into the -/// form used internally in Attributes. -inline Attributes constructAlignmentFromInt(unsigned i) { - // Default alignment, allow the target to define how to align it. - if (i == 0) - return None; - - assert(isPowerOf2_32(i) && "Alignment must be a power of two."); - assert(i <= 0x40000000 && "Alignment too large."); - return Attributes((Log2_32(i)+1) << 16); -} - -/// This returns the alignment field of an attribute as a byte alignment value. -inline unsigned getAlignmentFromAttrs(Attributes A) { - Attributes Align = A & Attribute::Alignment; - if (!Align) - return 0; - - return 1U << ((Align.Raw() >> 16) - 1); -} - -/// This turns an int stack alignment (which must be a power of 2) into -/// the form used internally in Attributes. -inline Attributes constructStackAlignmentFromInt(unsigned i) { - // Default alignment, allow the target to define how to align it. - if (i == 0) - return None; - - assert(isPowerOf2_32(i) && "Alignment must be a power of two."); - assert(i <= 0x100 && "Alignment too large."); - return Attributes((Log2_32(i)+1) << 26); -} - -/// This returns the stack alignment field of an attribute as a byte alignment -/// value. -inline unsigned getStackAlignmentFromAttrs(Attributes A) { - Attributes StackAlign = A & Attribute::StackAlignment; - if (!StackAlign) - return 0; - - return 1U << ((StackAlign.Raw() >> 26) - 1); -} - /// 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 @@ -236,9 +341,9 @@ inline uint64_t encodeLLVMAttributesForBitcode(Attributes Attrs) { // 11 bits. uint64_t EncodedAttrs = Attrs.Raw() & 0xffff; - if (Attrs & Attribute::Alignment) + if (Attrs.hasAlignmentAttr()) EncodedAttrs |= (1ull << 16) << - (((Attrs & Attribute::Alignment).Raw()-1) >> 16); + ((Attrs.getRawAlignment() - 1) >> 16); EncodedAttrs |= (Attrs.Raw() & (0xfffull << 21)) << 11; return EncodedAttrs; @@ -257,18 +362,12 @@ inline Attributes decodeLLVMAttributesForBitcode(uint64_t EncodedAttrs) { Attributes Attrs(EncodedAttrs & 0xffff); if (Alignment) - Attrs |= Attribute::constructAlignmentFromInt(Alignment); + Attrs |= Attributes::constructAlignmentFromInt(Alignment); Attrs |= Attributes((EncodedAttrs & (0xfffull << 32)) >> 11); return Attrs; } - -/// 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(Attributes Attrs); } // end namespace Attribute /// This is just a pair of values to associate a set of attributes @@ -346,13 +445,13 @@ public: /// paramHasAttr - Return true if the specified parameter index has the /// specified attribute set. bool paramHasAttr(unsigned Idx, Attributes Attr) const { - return getAttributes(Idx) & Attr; + return getAttributes(Idx).hasAttributes(Attr); } /// getParamAlignment - Return the alignment for the specified function /// parameter. unsigned getParamAlignment(unsigned Idx) const { - return Attribute::getAlignmentFromAttrs(getAttributes(Idx)); + return getAttributes(Idx).getAlignment(); } /// hasAttrSomewhere - Return true if the specified attribute is set for at |