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.
-
-/// @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 {
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
- ZExt = 1, ///< Zero extended before/after call
- SExt = 2, ///< Sign extended before/after call
- NoReturn = 3, ///< Mark the function as not returning
- InReg = 4, ///< Force argument to be passed in register
- StructRet = 5, ///< Hidden pointer to structure to return
- NoUnwind = 6, ///< Function doesn't unwind stack
- NoAlias = 7, ///< Considered to not alias after call
- ByVal = 8, ///< Pass structure by value
- Nest = 9, ///< Nested function static chain
- ReadNone = 10, ///< Function does not access memory
- ReadOnly = 11, ///< Function only reads from memory
- NoInline = 12, ///< inline=never
- AlwaysInline = 13, ///< inline=always
- OptimizeForSize = 14, ///< opt_size
- StackProtect = 15, ///< Stack protection.
- StackProtectReq = 16, ///< Stack protection required.
- Alignment = 17, ///< Alignment of parameter (5 bits)
+ AddressSafety = 1, ///< Address safety checking is on.
+ Alignment = 2, ///< Alignment of parameter (5 bits)
///< stored as log2 of alignment with +1 bias
///< 0 means unaligned different from align 1
- NoCapture = 18, ///< Function creates no aliases of pointer
- NoRedZone = 19, ///< Disable redzone
- NoImplicitFloat = 20, ///< Disable implicit floating point insts
- Naked = 21, ///< Naked function
- InlineHint = 22, ///< Source said inlining was desirable
- StackAlignment = 23, ///< Alignment of stack for function (3 bits)
+ AlwaysInline = 3, ///< inline=always
+ ByVal = 4, ///< Pass structure by value
+ InlineHint = 5, ///< Source said inlining was desirable
+ InReg = 6, ///< Force argument to be passed in register
+ Naked = 7, ///< Naked function
+ Nest = 8, ///< Nested function static chain
+ NoAlias = 9, ///< Considered to not alias after call
+ NoCapture = 10, ///< Function creates no aliases of pointer
+ NoImplicitFloat = 11, ///< Disable implicit floating point insts
+ NoInline = 12, ///< inline=never
+ NonLazyBind = 13, ///< Function is called early and/or
+ ///< often, so lazy binding isn't worthwhile
+ NoRedZone = 14, ///< Disable redzone
+ NoReturn = 15, ///< Mark the function as not returning
+ NoUnwind = 16, ///< Function doesn't unwind stack
+ OptimizeForSize = 17, ///< opt_size
+ ReadNone = 18, ///< Function does not access memory
+ ReadOnly = 19, ///< Function only reads from memory
+ ReturnsTwice = 20, ///< Function can return twice
+ SExt = 21, ///< Sign extended before/after call
+ StackAlignment = 22, ///< Alignment of stack for function (3 bits)
///< stored as log2 of alignment with +1 bias 0
///< means unaligned (different from
///< alignstack={1))
- ReturnsTwice = 24, ///< Function can return twice
- UWTable = 25, ///< Function must be in a unwind table
- NonLazyBind = 26, ///< Function is called early and/or
- ///< often, so lazy binding isn't worthwhile
- AddressSafety = 27 ///< Address safety checking is on.
+ StackProtect = 23, ///< Stack protection.
+ StackProtectReq = 24, ///< Stack protection required.
+ StructRet = 25, ///< Hidden pointer to structure to return
+ UWTable = 26, ///< Function must be in a unwind table
+ ZExt = 27 ///< Zero extended before/after call
};
private:
- // Currently, we need less than 64 bits.
AttributesImpl Attrs;
explicit Attributes(AttributesImpl *A);
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 {
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;
-
- void addAttribute(Attributes::AttrVal Val);
- void removeAttribute(Attributes::AttrVal Val);
-
- void addAlignmentAttr(unsigned Align);
- void addStackAlignmentAttr(unsigned Align);
-
- void removeAttributes(const Attributes &A);
-
- void removeAddressSafetyAttr();
- void removeAlwaysInlineAttr();
- void removeByValAttr();
- void removeInlineHintAttr();
- void removeInRegAttr();
- void removeNakedAttr();
- void removeNestAttr();
- void removeNoAliasAttr();
- void removeNoCaptureAttr();
- void removeNoImplicitFloatAttr();
- void removeNoInlineAttr();
- void removeNonLazyBindAttr();
- void removeNoRedZoneAttr();
- void removeNoReturnAttr();
- void removeNoUnwindAttr();
- void removeOptimizeForSizeAttr();
- void removeReadNoneAttr();
- void removeReadOnlyAttr();
- void removeReturnsTwiceAttr();
- void removeSExtAttr();
- void removeStackProtectAttr();
- void removeStackProtectReqAttr();
- void removeStructRetAttr();
- void removeUWTableAttr();
- void removeZExtAttr();
-
- void removeAlignmentAttr();
- void removeStackAlignmentAttr();
+ uint64_t getStackAlignment() const;
+
+ Builder &addAttribute(Attributes::AttrVal Val);
+ Builder &removeAttribute(Attributes::AttrVal Val);
+
+ /// addRawValue - Add the raw value to the internal representation. This
+ /// should be used ONLY for decoding bitcode!
+ Builder &addRawValue(uint64_t Val);
+
+ /// 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 &addAttributes(const Attributes &A);
+ Builder &removeAttributes(const Attributes &A);
+
+ /// @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);
+ }
+
+ 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
static Attributes get(Builder &B);
static Attributes get(LLVMContext &Context, Builder &B);
- /// @brief Parameter attributes that do not apply to vararg call arguments.
- bool hasIncompatibleWithVarArgsAttrs() const {
- return hasAttribute(Attributes::StructRet);
- }
-
/// @brief Return true if the attribute is present.
bool hasAttribute(AttrVal Val) const;
/// @brief Return true if the attributes are a non-null intersection.
bool hasAttributes(const Attributes &A) const;
- /// This returns the alignment field of an attribute as a byte alignment
+ /// @brief Returns the alignment field of an attribute as a byte alignment
/// value.
unsigned getAlignment() const;
- /// This returns the stack alignment field of an attribute as a byte alignment
- /// value.
+ /// @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);
+ }
+
bool isEmptyOrSingleton() const;
// This is a "safe bool() operator".
return Attrs.Bits != A.Attrs.Bits;
}
- 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);
// 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;
}
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
///< Index 0 is used for return value attributes.
///< Index ~0U is used for function attributes.
+ static AttributeWithIndex get(unsigned Idx,
+ ArrayRef<Attributes::AttrVal> Attrs) {
+ Attributes::Builder B;
+
+ for (ArrayRef<Attributes::AttrVal>::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;
/// 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;
+ AttrListPtr 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;
+ AttrListPtr removeAttr(LLVMContext &C, unsigned Idx, Attributes Attrs) const;
//===--------------------------------------------------------------------===//
// Attribute List Accessors
/// 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;
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