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Some small reorganization to get read for Attributes overhaul.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163947 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2012-09-14 23:05:52 +00:00
parent ec3fc2eac0
commit d426a642a2
1 changed files with 50 additions and 49 deletions
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99
include/llvm/Attributes.h
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@ -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 +96,48 @@ 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) { }
// 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; }
};
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.