#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/FoldingSet.h"
-#include "llvm/Support/MathExtras.h"
#include <cassert>
#include <string>
class AttrBuilder;
class AttributeImpl;
+class AttributeSetImpl;
+class AttributeSetNode;
class Constant;
class LLVMContext;
class Type;
class Attribute {
public:
/// This enumeration lists the attributes that can be associated with
- /// parameters, function results or the function itself.
+ /// parameters, function results, or the function itself.
///
- /// Note: 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.
+ /// Note: The `uwtable' attribute 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
+ /// 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:
///
public:
Attribute() : pImpl(0) {}
- /// \brief Return a uniquified Attribute object. This takes the uniquified
- /// value from the Builder and wraps it in the Attribute class.
- static Attribute get(LLVMContext &Context, ArrayRef<AttrKind> Vals);
- static Attribute get(LLVMContext &Context, AttrBuilder &B);
+ //===--------------------------------------------------------------------===//
+ // Attribute Construction
+ //===--------------------------------------------------------------------===//
+
+ /// \brief Return a uniquified Attribute object.
+ static Attribute get(LLVMContext &Context, AttrKind Kind, Constant *Val = 0);
+ static Attribute get(LLVMContext &Context, Constant *Kind, Constant *Val = 0);
+
+ /// \brief Return a uniquified Attribute object that has the specific
+ /// alignment set.
+ static Attribute getWithAlignment(LLVMContext &Context, uint64_t Align);
+ static Attribute getWithStackAlignment(LLVMContext &Context, uint64_t Align);
+
+ //===--------------------------------------------------------------------===//
+ // Attribute Accessors
+ //===--------------------------------------------------------------------===//
/// \brief Return true if the attribute is present.
bool hasAttribute(AttrKind Val) const;
- /// \brief Return true if attributes exist
- bool hasAttributes() const;
+ /// \brief Return the kind of this attribute: enum or string.
+ Constant *getAttributeKind() const;
+
+ /// \brief Return the values (if present) of the attribute. This may be a
+ /// ConstantVector to represent a list of values associated with the
+ /// attribute.
+ Constant *getAttributeValues() const;
/// \brief Returns the alignment field of an attribute as a byte alignment
/// value.
/// alignment value.
unsigned getStackAlignment() const;
+ /// \brief The Attribute is converted to a string of equivalent mnemonic. This
+ /// is, presumably, for writing out the mnemonics for the assembly writer.
+ std::string getAsString() const;
+
/// \brief Equality and non-equality query methods.
bool operator==(AttrKind K) const;
bool operator!=(AttrKind K) const;
+ bool operator==(Attribute A) const { return pImpl == A.pImpl; }
+ bool operator!=(Attribute A) const { return pImpl != A.pImpl; }
+
+ /// \brief Less-than operator. Useful for sorting the attributes list.
bool operator<(Attribute A) const;
void Profile(FoldingSetNodeID &ID) const {
ID.AddPointer(pImpl);
}
-
- // FIXME: Remove these 'operator' methods.
- bool operator==(const Attribute &A) const {
- return pImpl == A.pImpl;
- }
- bool operator!=(const Attribute &A) const {
- return pImpl != A.pImpl;
- }
-
- uint64_t Raw() const;
-
- /// \brief The Attribute is converted to a string of equivalent mnemonic. This
- /// is, presumably, for writing out the mnemonics for the assembly writer.
- std::string getAsString() const;
};
-//===----------------------------------------------------------------------===//
-/// \class
-/// \brief Provide DenseMapInfo for Attribute::AttrKinds. This is used by
-/// AttrBuilder.
-template<> struct DenseMapInfo<Attribute::AttrKind> {
- static inline Attribute::AttrKind getEmptyKey() {
- return Attribute::AttrKindEmptyKey;
- }
- static inline Attribute::AttrKind getTombstoneKey() {
- return Attribute::AttrKindTombstoneKey;
- }
- static unsigned getHashValue(const Attribute::AttrKind &Val) {
- return Val * 37U;
- }
- static bool isEqual(const Attribute::AttrKind &LHS,
- const Attribute::AttrKind &RHS) {
- return LHS == RHS;
- }
-};
-
-//===----------------------------------------------------------------------===//
-// AttributeSet Smart Pointer
-//===----------------------------------------------------------------------===//
-
-class AttrBuilder;
-class AttributeSetImpl;
-struct AttributeWithIndex;
-
//===----------------------------------------------------------------------===//
/// \class
/// \brief This class manages the ref count for the opaque AttributeSetImpl
};
private:
friend class AttrBuilder;
+ friend class AttributeSetImpl;
- /// \brief The attributes that we are managing. This can be null to represent
+ /// \brief The attributes that we are managing. This can be null to represent
/// the empty attributes list.
- AttributeSetImpl *AttrList;
+ AttributeSetImpl *pImpl;
- /// \brief The attributes for the specified index are returned. Attributes
- /// for the result are denoted with Idx = 0.
- Attribute getAttributes(unsigned Idx) const;
+ /// \brief The attributes for the specified index are returned.
+ AttributeSetNode *getAttributes(unsigned Idx) const;
- /// \brief Add the specified attribute at the specified index to this
- /// attribute list. Since attribute lists are immutable, this returns the new
- /// list.
- AttributeSet addAttr(LLVMContext &C, unsigned Idx, Attribute Attrs) const;
+ /// \brief Create an AttributeSet with the specified parameters in it.
+ static AttributeSet get(LLVMContext &C,
+ ArrayRef<std::pair<unsigned, Attribute> > Attrs);
+ static AttributeSet get(LLVMContext &C,
+ ArrayRef<std::pair<unsigned,
+ AttributeSetNode*> > Attrs);
- /// \brief Remove the specified attribute at the specified index from this
- /// attribute list. Since attribute lists are immutable, this returns the new
- /// list.
- AttributeSet removeAttr(LLVMContext &C, unsigned Idx, Attribute Attrs) const;
+ static AttributeSet getImpl(LLVMContext &C,
+ ArrayRef<std::pair<unsigned,
+ AttributeSetNode*> > Attrs);
- explicit AttributeSet(AttributeSetImpl *LI) : AttrList(LI) {}
+
+ explicit AttributeSet(AttributeSetImpl *LI) : pImpl(LI) {}
public:
- AttributeSet() : AttrList(0) {}
- AttributeSet(const AttributeSet &P) : AttrList(P.AttrList) {}
- const AttributeSet &operator=(const AttributeSet &RHS);
+ AttributeSet() : pImpl(0) {}
+ AttributeSet(const AttributeSet &P) : pImpl(P.pImpl) {}
+ const AttributeSet &operator=(const AttributeSet &RHS) {
+ pImpl = RHS.pImpl;
+ return *this;
+ }
//===--------------------------------------------------------------------===//
- // Attribute List Construction and Mutation
+ // AttributeSet Construction and Mutation
//===--------------------------------------------------------------------===//
/// \brief Return an AttributeSet with the specified parameters in it.
- static AttributeSet get(LLVMContext &C, ArrayRef<AttributeWithIndex> Attrs);
static AttributeSet get(LLVMContext &C, ArrayRef<AttributeSet> Attrs);
static AttributeSet get(LLVMContext &C, unsigned Idx,
ArrayRef<Attribute::AttrKind> Kind);
AttributeSet addAttributes(LLVMContext &C, unsigned Idx,
AttributeSet Attrs) const;
- /// \brief Add return attributes to this attribute set. Since attribute sets
- /// are immutable, this returns a new set.
- AttributeSet addRetAttributes(LLVMContext &C, AttributeSet Attrs) const {
- return addAttributes(C, ReturnIndex, Attrs);
- }
-
- /// \brief Add function attributes to this attribute set. Since attribute sets
- /// are immutable, this returns a new set.
- AttributeSet addFnAttributes(LLVMContext &C, AttributeSet Attrs) const {
- return addAttributes(C, FunctionIndex, Attrs);
- }
-
/// \brief Remove the specified attribute at the specified index from this
/// attribute list. Since attribute lists are immutable, this returns the new
/// list.
AttributeSet Attrs) const;
//===--------------------------------------------------------------------===//
- // Attribute List Accessors
+ // AttributeSet Accessors
//===--------------------------------------------------------------------===//
/// \brief The attributes for the specified index are returned.
/// \brief The function attributes are returned.
AttributeSet getFnAttributes() const;
- /// \brief Return the alignment for the specified function parameter.
- unsigned getParamAlignment(unsigned Idx) const;
-
/// \brief Return true if the attribute exists at the given index.
bool hasAttribute(unsigned Index, Attribute::AttrKind Kind) const;
/// \brief Return true if attribute exists at the given index.
bool hasAttributes(unsigned Index) const;
- /// \brief Returns the alignment field of an attribute as a byte alignment
- /// value.
- unsigned getAlignment(unsigned Index) const;
+ /// \brief Return true if the specified attribute is set for at least one
+ /// parameter or for the return value.
+ bool hasAttrSomewhere(Attribute::AttrKind Attr) const;
+
+ /// \brief Return the alignment for the specified function parameter.
+ unsigned getParamAlignment(unsigned Idx) const;
/// \brief Get the stack alignment.
unsigned getStackAlignment(unsigned Index) const;
/// \brief Return the attributes at the index as a string.
std::string getAsString(unsigned Index) const;
- uint64_t Raw(unsigned Index) const;
+ typedef ArrayRef<Attribute>::iterator iterator;
- /// \brief Return true if the specified attribute is set for at least one
- /// parameter or for the return value.
- bool hasAttrSomewhere(Attribute::AttrKind Attr) const;
+ iterator begin(unsigned Idx) const;
+ iterator end(unsigned Idx) const;
/// operator==/!= - Provide equality predicates.
bool operator==(const AttributeSet &RHS) const {
- return AttrList == RHS.AttrList;
+ return pImpl == RHS.pImpl;
}
bool operator!=(const AttributeSet &RHS) const {
- return AttrList != RHS.AttrList;
+ return pImpl != RHS.pImpl;
}
//===--------------------------------------------------------------------===//
- // Attribute List Introspection
+ // AttributeSet Introspection
//===--------------------------------------------------------------------===//
+ // FIXME: Remove this.
+ uint64_t Raw(unsigned Index) const;
+
/// \brief Return a raw pointer that uniquely identifies this attribute list.
void *getRawPointer() const {
- return AttrList;
+ return pImpl;
}
- // Attributes are stored as a dense set of slots, where there is one slot for
- // each argument that has an attribute. This allows walking over the dense
- // set instead of walking the sparse list of attributes.
-
/// \brief Return true if there are no attributes.
bool isEmpty() const {
- return AttrList == 0;
+ return getNumSlots() == 0;
}
/// \brief Return the number of slots used in this attribute list. This is
unsigned getNumSlots() const;
/// \brief Return the index for the given slot.
- unsigned getSlotIndex(unsigned Slot) const;
+ uint64_t getSlotIndex(unsigned Slot) const;
/// \brief Return the attributes at the given slot.
AttributeSet getSlotAttributes(unsigned Slot) const;
//===----------------------------------------------------------------------===//
/// \class
-/// \brief This is just a pair of values to associate a set of attributes with
-/// an index.
-struct AttributeWithIndex {
- Attribute Attrs; ///< The attributes that are set, or'd together.
- unsigned Index; ///< Index of the parameter for which the attributes apply.
-
- // FIXME: These methods all need to be revised. The first one is temporary.
- static AttributeWithIndex get(LLVMContext &C, unsigned Idx, AttributeSet AS);
- static AttributeWithIndex get(LLVMContext &C, unsigned Idx,
- ArrayRef<Attribute::AttrKind> Attrs) {
- return get(Idx, Attribute::get(C, Attrs));
+/// \brief Provide DenseMapInfo for Attribute::AttrKinds. This is used by
+/// AttrBuilder.
+template<> struct DenseMapInfo<Attribute::AttrKind> {
+ static inline Attribute::AttrKind getEmptyKey() {
+ return Attribute::AttrKindEmptyKey;
}
- static AttributeWithIndex get(unsigned Idx, Attribute Attrs) {
- AttributeWithIndex P;
- P.Index = Idx;
- P.Attrs = Attrs;
- return P;
+ static inline Attribute::AttrKind getTombstoneKey() {
+ return Attribute::AttrKindTombstoneKey;
+ }
+ static unsigned getHashValue(const Attribute::AttrKind &Val) {
+ return Val * 37U;
+ }
+ static bool isEqual(const Attribute::AttrKind &LHS,
+ const Attribute::AttrKind &RHS) {
+ return LHS == RHS;
}
};
uint64_t StackAlignment;
public:
AttrBuilder() : Alignment(0), StackAlignment(0) {}
- explicit AttrBuilder(uint64_t B) : Alignment(0), StackAlignment(0) {
- addRawValue(B);
+ explicit AttrBuilder(uint64_t Val) : Alignment(0), StackAlignment(0) {
+ addRawValue(Val);
}
AttrBuilder(const Attribute &A) : Alignment(0), StackAlignment(0) {
- addAttributes(A);
+ addAttribute(A);
}
AttrBuilder(AttributeSet AS, unsigned Idx);
/// \brief Add an attribute to the builder.
AttrBuilder &addAttribute(Attribute::AttrKind Val);
+ /// \brief Add the Attribute object to the builder.
+ AttrBuilder &addAttribute(Attribute A);
+
/// \brief Remove an attribute from the builder.
AttrBuilder &removeAttribute(Attribute::AttrKind Val);
- /// \brief Add the attributes from A to the builder.
- AttrBuilder &addAttributes(const Attribute &A);
-
- /// \brief Remove the attributes from A from the builder.
- AttrBuilder &removeAttributes(const Attribute &A);
+ /// \brief Remove the attributes from the builder.
+ AttrBuilder &removeAttributes(AttributeSet A, uint64_t Index);
/// \brief Return true if the builder has the specified attribute.
bool contains(Attribute::AttrKind A) const;
/// \brief Return true if the builder has any attribute that's in the
/// specified attribute.
- bool hasAttributes(const Attribute &A) const;
+ bool hasAttributes(AttributeSet A, uint64_t Index) const;
/// \brief Return true if the builder has an alignment attribute.
bool hasAlignmentAttr() const;
typedef DenseSet<Attribute::AttrKind>::iterator iterator;
typedef DenseSet<Attribute::AttrKind>::const_iterator const_iterator;
- iterator begin() { return Attrs.begin(); }
- iterator end() { return Attrs.end(); }
+ iterator begin() { return Attrs.begin(); }
+ iterator end() { return Attrs.end(); }
const_iterator begin() const { return Attrs.begin(); }
const_iterator end() const { return Attrs.end(); }
- /// \brief Add the raw value to the internal representation.
- ///
- /// N.B. This should be used ONLY for decoding LLVM bitcode!
- AttrBuilder &addRawValue(uint64_t Val);
-
/// \brief Remove attributes that are used on functions only.
void removeFunctionOnlyAttrs() {
removeAttribute(Attribute::NoReturn)
.removeAttribute(Attribute::NoDuplicate);
}
- uint64_t Raw() const;
-
bool operator==(const AttrBuilder &B);
bool operator!=(const AttrBuilder &B) {
return !(*this == B);
}
+
+ // FIXME: Remove this in 4.0.
+
+ /// \brief Add the raw value to the internal representation.
+ AttrBuilder &addRawValue(uint64_t Val);
};
namespace AttributeFuncs {
/// \brief Which attributes cannot be applied to a type.
-Attribute typeIncompatible(Type *Ty);
-
-/// \brief 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 compatibility.
-uint64_t encodeLLVMAttributesForBitcode(AttributeSet Attrs, unsigned Index);
-
-/// \brief This returns an attribute bitset containing the LLVM attributes that
-/// have been decoded from the given integer. This function must stay in sync
-/// with 'encodeLLVMAttributesForBitcode'.
-Attribute decodeLLVMAttributesForBitcode(LLVMContext &C,
- uint64_t EncodedAttrs);
+AttributeSet typeIncompatible(Type *Ty, uint64_t Index);
} // end AttributeFuncs namespace
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