b518054b87
Summary: This class is a list of AttributeSetNodes corresponding the function prototype of a call or function declaration. This class used to be called ParamAttrListPtr, then AttrListPtr, then AttributeSet. It is typically accessed by parameter and return value index, so "AttributeList" seems like a more intuitive name. Rename AttributeSetImpl to AttributeListImpl to follow suit. It's useful to rename this class so that we can rename AttributeSetNode to AttributeSet later. AttributeSet is the set of attributes that apply to a single function, argument, or return value. Reviewers: sanjoy, javed.absar, chandlerc, pete Reviewed By: pete Subscribers: pete, jholewinski, arsenm, dschuff, mehdi_amini, jfb, nhaehnle, sbc100, void, llvm-commits Differential Revision: https://reviews.llvm.org/D31102 llvm-svn: 298393
108 lines
3.5 KiB
C++
108 lines
3.5 KiB
C++
//===-- AttributeSetNode.h - AttributeList Internal Node ---------*- C++
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//-*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// \brief This file defines the node class used internally by AttributeList.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_IR_ATTRIBUTESETNODE_H
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#define LLVM_IR_ATTRIBUTESETNODE_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/FoldingSet.h"
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#include "llvm/ADT/Optional.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/IR/Attributes.h"
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#include "llvm/Support/TrailingObjects.h"
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#include <algorithm>
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#include <climits>
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#include <cstdint>
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#include <string>
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#include <utility>
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namespace llvm {
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//===----------------------------------------------------------------------===//
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/// \class
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/// \brief This class represents a group of attributes that apply to one
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/// element: function, return type, or parameter.
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class AttributeSetNode final
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: public FoldingSetNode,
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private TrailingObjects<AttributeSetNode, Attribute> {
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friend TrailingObjects;
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unsigned NumAttrs; ///< Number of attributes in this node.
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/// Bitset with a bit for each available attribute Attribute::AttrKind.
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uint64_t AvailableAttrs;
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AttributeSetNode(ArrayRef<Attribute> Attrs)
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: NumAttrs(Attrs.size()), AvailableAttrs(0) {
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static_assert(Attribute::EndAttrKinds <= sizeof(AvailableAttrs) * CHAR_BIT,
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"Too many attributes for AvailableAttrs");
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// There's memory after the node where we can store the entries in.
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std::copy(Attrs.begin(), Attrs.end(), getTrailingObjects<Attribute>());
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for (Attribute I : *this) {
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if (!I.isStringAttribute()) {
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AvailableAttrs |= ((uint64_t)1) << I.getKindAsEnum();
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}
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}
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}
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public:
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// AttributesSetNode is uniqued, these should not be available.
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AttributeSetNode(const AttributeSetNode &) = delete;
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AttributeSetNode &operator=(const AttributeSetNode &) = delete;
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void operator delete(void *p) { ::operator delete(p); }
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static AttributeSetNode *get(LLVMContext &C, ArrayRef<Attribute> Attrs);
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static AttributeSetNode *get(AttributeList AS, unsigned Index) {
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return AS.getAttributes(Index);
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}
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/// \brief Return the number of attributes this AttributeList contains.
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unsigned getNumAttributes() const { return NumAttrs; }
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bool hasAttribute(Attribute::AttrKind Kind) const {
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return AvailableAttrs & ((uint64_t)1) << Kind;
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}
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bool hasAttribute(StringRef Kind) const;
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bool hasAttributes() const { return NumAttrs != 0; }
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Attribute getAttribute(Attribute::AttrKind Kind) const;
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Attribute getAttribute(StringRef Kind) const;
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unsigned getAlignment() const;
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unsigned getStackAlignment() const;
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uint64_t getDereferenceableBytes() const;
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uint64_t getDereferenceableOrNullBytes() const;
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std::pair<unsigned, Optional<unsigned>> getAllocSizeArgs() const;
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std::string getAsString(bool InAttrGrp) const;
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typedef const Attribute *iterator;
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iterator begin() const { return getTrailingObjects<Attribute>(); }
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iterator end() const { return begin() + NumAttrs; }
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void Profile(FoldingSetNodeID &ID) const {
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Profile(ID, makeArrayRef(begin(), end()));
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}
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static void Profile(FoldingSetNodeID &ID, ArrayRef<Attribute> AttrList) {
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for (const auto &Attr : AttrList)
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Attr.Profile(ID);
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}
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};
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} // end namespace llvm
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#endif // LLVM_IR_ATTRIBUTESETNODE_H
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