#ifndef LLVM_ATTRIBUTES_H
#define LLVM_ATTRIBUTES_H
-#include "llvm/AttributesImpl.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/ADT/ArrayRef.h"
#include <cassert>
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 AttrConst name = {value};
-
-#undef DECLARE_LLVM_ATTRIBUTE
-
-} // 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.
ZExt = 27 ///< Zero extended before/after call
};
private:
- AttributesImpl Attrs;
+ AttributesImpl *Attrs;
explicit Attributes(AttributesImpl *A);
public:
Attributes() : Attrs(0) {}
- explicit Attributes(uint64_t Val);
- /*implicit*/ Attributes(Attribute::AttrConst Val);
+ explicit Attributes(LLVMContext &C, ArrayRef<AttrVal> Vals);
Attributes(const Attributes &A);
+ Attributes &operator=(const Attributes &A) {
+ Attrs = A.Attrs;
+ return *this;
+ }
class Builder {
friend class Attributes;
uint64_t Bits;
public:
Builder() : Bits(0) {}
+ explicit Builder(uint64_t B) : Bits(B) {}
Builder(const Attributes &A) : Bits(A.Raw()) {}
+ Builder(const Builder &B) : Bits(B.Bits) {}
void clear() { Bits = 0; }
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);
+
+ /// 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);
- void removeAttributes(const Attributes &A);
+ Builder &addAttributes(const Attributes &A);
+ Builder &removeAttributes(const Attributes &A);
/// @brief Remove attributes that are used on functions only.
void removeFunctionOnlyAttrs() {
.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
/// value from the Builder and wraps it in the Attributes class.
- static Attributes get(Builder &B);
static Attributes get(LLVMContext &Context, Builder &B);
/// @brief Return true if the attribute is present.
bool hasAttribute(AttrVal Val) const;
/// @brief Return true if attributes exist
- bool hasAttributes() const {
- return Attrs.hasAttributes();
- }
+ bool hasAttributes() const;
/// @brief Return true if the attributes are a non-null intersection.
bool hasAttributes(const Attributes &A) const;
hasAttribute(Attributes::AddressSafety);
}
- bool isEmptyOrSingleton() const;
-
- // This is a "safe bool() operator".
- operator const void *() const { return Attrs.Bits ? this : 0; }
bool operator == (const Attributes &A) const {
- return Attrs.Bits == A.Attrs.Bits;
+ return Attrs == A.Attrs;
}
bool operator != (const Attributes &A) const {
- return Attrs.Bits != A.Attrs.Bits;
+ return Attrs != A.Attrs;
}
- 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 Attributes();
-
- 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 Attributes();
-
- 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);
/// 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) {
+ static Attributes decodeLLVMAttributesForBitcode(LLVMContext &C,
+ 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);
+ 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(C, 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,
+ static AttributeWithIndex get(LLVMContext &C, unsigned Idx,
ArrayRef<Attributes::AttrVal> Attrs) {
Attributes::Builder B;
AttributeWithIndex P;
P.Index = Idx;
- P.Attrs = Attributes::get(B);
+ P.Attrs = Attributes::get(C, B);
return P;
}
static AttributeWithIndex get(unsigned Idx, Attributes 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;
+ 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
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