X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FAttributes.h;h=c8f723a7dcffe43c3129bb1ea3df12d351a5920f;hb=3756e70af69096a82b367ee9667e7720ca2201e4;hp=aa7bc32761a84e6e752c39ddf85f763512012a05;hpb=28d1c60f89f7d224879bd84b89c3e280e6a7333b;p=oota-llvm.git diff --git a/include/llvm/Attributes.h b/include/llvm/Attributes.h index aa7bc32761a..c8f723a7dcf 100644 --- a/include/llvm/Attributes.h +++ b/include/llvm/Attributes.h @@ -26,92 +26,6 @@ namespace llvm { class LLVMContext; class Type; -namespace Attribute { - -/// AttrConst - 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. - -} // namespace Attribute - /// AttributeImpl - The internal representation of the Attributes class. This is /// uniquified. class AttributesImpl; @@ -119,6 +33,25 @@ class AttributesImpl; /// Attributes - A bitset of attributes. class Attributes { public: + /// 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 { None = 0, ///< No attributes have been set AddressSafety = 1, ///< Address safety checking is on. @@ -162,7 +95,7 @@ private: public: Attributes() : Attrs(0) {} explicit Attributes(uint64_t Val); - /*implicit*/ Attributes(Attribute::AttrConst Val); + explicit Attributes(LLVMContext &C, AttrVal Val); Attributes(const Attributes &A); class Builder { @@ -170,23 +103,35 @@ public: uint64_t Bits; public: Builder() : Bits(0) {} + explicit Builder(uint64_t B) : Bits(B) {} Builder(const Attributes &A) : Bits(A.Raw()) {} void clear() { Bits = 0; } + bool hasAttribute(Attributes::AttrVal A) const; bool hasAttributes() const; bool hasAttributes(const Attributes &A) const; bool hasAlignmentAttr() const; uint64_t getAlignment() const; + uint64_t getStackAlignment() const; Builder &addAttribute(Attributes::AttrVal Val); Builder &removeAttribute(Attributes::AttrVal Val); - void addAlignmentAttr(unsigned Align); - void addStackAlignmentAttr(unsigned Align); + /// addRawValue - Add the raw value to the internal representation. This + /// should be used ONLY for decoding bitcode! + Builder &addRawValue(uint64_t Val); - void removeAttributes(const Attributes &A); + /// addAlignmentAttr - This turns an int alignment (which must be a power of + /// 2) into the form used internally in Attributes. + Builder &addAlignmentAttr(unsigned Align); + + /// addStackAlignmentAttr - This turns an int stack alignment (which must be + /// a power of 2) into the form used internally in Attributes. + Builder &addStackAlignmentAttr(unsigned Align); + + Builder &removeAttributes(const Attributes &A); /// @brief Remove attributes that are used on functions only. void removeFunctionOnlyAttrs() { @@ -209,6 +154,13 @@ public: .removeAttribute(Attributes::ReturnsTwice) .removeAttribute(Attributes::AddressSafety); } + + bool operator==(const Builder &B) { + return Bits == B.Bits; + } + bool operator!=(const Builder &B) { + return Bits != B.Bits; + } }; /// get - Return a uniquified Attributes object. This takes the uniquified @@ -284,37 +236,11 @@ public: Attributes operator | (const Attributes &A) const; Attributes operator & (const Attributes &A) const; - Attributes operator ^ (const Attributes &A) const; Attributes &operator |= (const Attributes &A); Attributes &operator &= (const Attributes &A); - Attributes operator ~ () const; uint64_t Raw() const; - /// constructAlignmentFromInt - 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); - } - - /// constructStackAlignmentFromInt - 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); - } - /// @brief Which attributes cannot be applied to a type. static Attributes typeIncompatible(Type *Ty); @@ -334,8 +260,7 @@ public: // bits. uint64_t EncodedAttrs = Attrs.Raw() & 0xffff; if (Attrs.hasAttribute(Attributes::Alignment)) - EncodedAttrs |= (1ULL << 16) << - (((Attrs.Raw() & Attribute::Alignment_i) - 1) >> 16); + EncodedAttrs |= Attrs.getAlignment() << 16; EncodedAttrs |= (Attrs.Raw() & (0xfffULL << 21)) << 11; return EncodedAttrs; } @@ -351,11 +276,11 @@ public: assert((!Alignment || isPowerOf2_32(Alignment)) && "Alignment must be a power of two."); - Attributes Attrs(EncodedAttrs & 0xffff); + Attributes::Builder B(EncodedAttrs & 0xffff); if (Alignment) - Attrs |= Attributes::constructAlignmentFromInt(Alignment); - Attrs |= Attributes((EncodedAttrs & (0xfffULL << 32)) >> 11); - return Attrs; + B.addAlignmentAttr(Alignment); + B.addRawValue((EncodedAttrs & (0xfffULL << 32)) >> 11); + return Attributes::get(B); } /// getAsString - The set of Attributes set in Attributes is converted to a @@ -377,6 +302,19 @@ struct AttributeWithIndex { ///< Index 0 is used for return value attributes. ///< Index ~0U is used for function attributes. + static AttributeWithIndex get(unsigned Idx, + ArrayRef Attrs) { + Attributes::Builder B; + + for (ArrayRef::iterator I = Attrs.begin(), + E = Attrs.end(); I != E; ++I) + B.addAttribute(*I); + + AttributeWithIndex P; + P.Index = Idx; + P.Attrs = Attributes::get(B); + return P; + } static AttributeWithIndex get(unsigned Idx, Attributes Attrs) { AttributeWithIndex P; P.Index = Idx; @@ -418,7 +356,7 @@ public: /// 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; + AttrListPtr removeAttr(LLVMContext &C, unsigned Idx, Attributes Attrs) const; //===--------------------------------------------------------------------===// // Attribute List Accessors @@ -454,7 +392,7 @@ 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;