-/// @brief A vector of attribute/index pairs.
-typedef SmallVector<ParamAttrsWithIndex,4> ParamAttrsVector;
-
-typedef ParamAttr::Attributes ParameterAttributes;
-
-/// This class is used by Function and CallInst to represent the set of
-/// parameter attributes used. It represents a list of pairs of uint16_t, one
-/// for the parameter index, and one a set of ParameterAttributes bits.
-/// Parameters that have no attributes are not present in the list. The list
-/// may also be empty, but this doesn't occur in practice. The list constructs
-/// as empty and is filled by the insert method. The list can be turned into
-/// a string of mnemonics suitable for LLVM Assembly output. Various accessors
-/// are provided to obtain information about the attributes.
-/// @brief A List of ParameterAttributes.
-class ParamAttrsList : public FoldingSetNode {
- /// @name Construction
- /// @{
- private:
- // ParamAttrsList is uniqued, thes should not be publicly available
- void operator=(const ParamAttrsList &); // Do not implement
- ParamAttrsList(const ParamAttrsList &); // Do not implement
- ParamAttrsList(); // Do not implement
- ~ParamAttrsList();
-
- /// @brief Construct an ParamAttrsList from a ParamAttrsVector
- explicit ParamAttrsList(const ParamAttrsVector &attrVec) : attrs(attrVec) {}
-
- public:
- /// This method ensures the uniqueness of ParamAttrsList instances. The
- /// argument is a vector of attribute/index pairs as represented by the
- /// ParamAttrsWithIndex structure. The vector is used in the construction of
- /// the ParamAttrsList instance. If an instance with identical vector pairs
- /// exists, it will be returned instead of creating a new instance.
- /// @brief Get a ParamAttrsList instance.
- static ParamAttrsList *get(const ParamAttrsVector &attrVec);
-
- /// @}
- /// @name Accessors
- /// @{
- public:
- /// The parameter attributes for the \p indexth parameter are returned.
- /// The 0th parameter refers to the return type of the function. Note that
- /// the \p param_index is an index into the function's parameters, not an
- /// index into this class's list of attributes. The result of getParamIndex
- /// is always suitable input to this function.
- /// @returns The all the ParameterAttributes for the \p indexth parameter
- /// as a uint16_t of enumeration values OR'd together.
- /// @brief Get the attributes for a parameter
- uint16_t getParamAttrs(uint16_t param_index) const;
-
- /// This checks to see if the \p ith function parameter has the parameter
- /// attribute given by \p attr set.
- /// @returns true if the parameter attribute is set
- /// @brief Determine if a ParameterAttributes is set
- bool paramHasAttr(uint16_t i, ParameterAttributes attr) const {
- return getParamAttrs(i) & attr;
- }
-
- /// The set of ParameterAttributes set in Attributes is converted to a
- /// string of equivalent mnemonics. This is, presumably, for writing out
- /// the mnemonics for the assembly writer.
- /// @brief Convert parameter attribute bits to text
- static std::string getParamAttrsText(uint16_t Attributes);
-
- /// The \p Indexth parameter attribute is converted to string.
- /// @brief Get the text for the parmeter attributes for one parameter.
- std::string getParamAttrsTextByIndex(uint16_t Index) const {
- return getParamAttrsText(getParamAttrs(Index));
- }
-
- /// @brief Comparison operator for ParamAttrsList
- bool operator < (const ParamAttrsList& that) const {
- if (this->attrs.size() < that.attrs.size())
- return true;
- if (this->attrs.size() > that.attrs.size())
- return false;
- for (unsigned i = 0; i < attrs.size(); ++i) {
- if (attrs[i].index < that.attrs[i].index)
- return true;
- if (attrs[i].index > that.attrs[i].index)
- return false;
- if (attrs[i].attrs < that.attrs[i].attrs)
- return true;
- if (attrs[i].attrs > that.attrs[i].attrs)
- return false;
- }
- return false;
- }
-
- /// Returns the parameter index of a particular parameter attribute in this
- /// list of attributes. Note that the attr_index is an index into this
- /// class's list of attributes, not the index of a parameter. The result
- /// is the index of the parameter. Clients generally should not use this
- /// method. It is used internally by LLVM.
- /// @brief Get a parameter index
- uint16_t getParamIndex(unsigned attr_index) const {
- return attrs[attr_index].index;
- }
-
- /// Determines how many parameter attributes are set in this ParamAttrsList.
- /// This says nothing about how many parameters the function has. It also
- /// says nothing about the highest parameter index that has attributes.
- /// Clients generally should not use this method. It is used internally by
- /// LLVM.
- /// @returns the number of parameter attributes in this ParamAttrsList.
- /// @brief Return the number of parameter attributes this type has.
- unsigned size() const { return attrs.size(); }
-
- /// @}
- /// @name Implementation Details
- /// @{
- public:
- void Profile(FoldingSetNodeID &ID) const;
- void dump() const;
- void addRef() const { refCount++; }
- void dropRef() const { if (--refCount == 0) delete this; }
-
- /// @}
- /// @name Data
- /// @{
- private:
- ParamAttrsVector attrs; ///< The list of attributes
- mutable unsigned refCount; ///< The number of references to this object
- /// @}
+class ParamAttributeListImpl;
+
+/// PAListPtr - This class manages the ref count for the opaque
+/// ParamAttributeListImpl object and provides accessors for it.
+class PAListPtr {
+ /// PAList - The parameter attributes that we are managing. This can be null
+ /// to represent the empty parameter attributes list.
+ ParamAttributeListImpl *PAList;
+public:
+ PAListPtr() : PAList(0) {}
+ PAListPtr(const PAListPtr &P);
+ const PAListPtr &operator=(const PAListPtr &RHS);
+ ~PAListPtr();
+
+ //===--------------------------------------------------------------------===//
+ // Parameter Attribute List Construction and Mutation
+ //===--------------------------------------------------------------------===//
+
+ /// get - Return a ParamAttrs list with the specified parameter in it.
+ static PAListPtr get(const ParamAttrsWithIndex *Attr, unsigned NumAttrs);
+
+ /// get - Return a ParamAttr list with the parameters specified by the
+ /// consecutive random access iterator range.
+ template <typename Iter>
+ static PAListPtr get(const Iter &I, const Iter &E) {
+ if (I == E) return PAListPtr(); // Empty list.
+ return get(&*I, static_cast<unsigned>(E-I));
+ }
+
+ /// addAttr - Add the specified attribute at the specified index to this
+ /// attribute list. Since parameter attribute lists are immutable, this
+ /// returns the new list.
+ PAListPtr addAttr(unsigned Idx, ParameterAttributes Attrs) const;
+
+ /// removeAttr - Remove the specified attribute at the specified index from
+ /// this attribute list. Since parameter attribute lists are immutable, this
+ /// returns the new list.
+ PAListPtr removeAttr(unsigned Idx, ParameterAttributes Attrs) const;
+
+ //===--------------------------------------------------------------------===//
+ // Parameter Attribute List Accessors
+ //===--------------------------------------------------------------------===//
+
+ /// getParamAttrs - The parameter attributes for the specified parameter are
+ /// returned. Parameters for the result are denoted with Idx = 0.
+ ParameterAttributes getParamAttrs(unsigned Idx) const;
+
+ /// paramHasAttr - Return true if the specified parameter index has the
+ /// specified attribute set.
+ bool paramHasAttr(unsigned Idx, ParameterAttributes Attr) const {
+ return getParamAttrs(Idx) & Attr;
+ }
+
+ /// getParamAlignment - Return the alignment for the specified function
+ /// parameter.
+ unsigned getParamAlignment(unsigned Idx) const {
+ return (getParamAttrs(Idx) & ParamAttr::Alignment) >> 16;
+ }
+
+ /// hasAttrSomewhere - Return true if the specified attribute is set for at
+ /// least one parameter or for the return value.
+ bool hasAttrSomewhere(ParameterAttributes Attr) const;
+
+ /// operator==/!= - Provide equality predicates.
+ bool operator==(const PAListPtr &RHS) const { return PAList == RHS.PAList; }
+ bool operator!=(const PAListPtr &RHS) const { return PAList != RHS.PAList; }
+
+ void dump() const;
+
+ //===--------------------------------------------------------------------===//
+ // Parameter Attribute List Introspection
+ //===--------------------------------------------------------------------===//
+
+ /// getRawPointer - Return a raw pointer that uniquely identifies this
+ /// parameter attribute list.
+ void *getRawPointer() const {
+ return PAList;
+ }
+
+ // Parameter 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.
+
+ /// isEmpty - Return true if no parameters have an attribute.
+ ///
+ bool isEmpty() const {
+ return PAList == 0;
+ }
+
+ /// getNumSlots - Return the number of slots used in this attribute list.
+ /// This is the number of arguments that have an attribute set on them
+ /// (including the function itself).
+ unsigned getNumSlots() const;
+
+ /// getSlot - Return the ParamAttrsWithIndex at the specified slot. This
+ /// holds a parameter number plus a set of attributes.
+ const ParamAttrsWithIndex &getSlot(unsigned Slot) const;
+
+private:
+ explicit PAListPtr(ParamAttributeListImpl *L);