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1b980052b1
Before this commit we scanned the vtables every time we wanted to know who are the subclasses of a class. Now we scan the vtables just once. Swift SVN r20847
79 lines
2.1 KiB
C++
79 lines
2.1 KiB
C++
//===-- ClassHierarchyAnalysis.h - Analysis of Class Hierarchy --*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_SILANALYSIS_CLASSHIERARCHY_H
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#define SWIFT_SILANALYSIS_CLASSHIERARCHY_H
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#include "swift/SILAnalysis/Analysis.h"
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#include "swift/SIL/SILArgument.h"
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#include "swift/SIL/SILValue.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/SmallSet.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/Support/Debug.h"
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namespace swift {
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class SILModule;
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class ClassDecl;
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class ClassHierarchyAnalysis : public SILAnalysis {
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public:
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typedef llvm::SmallVector<ClassDecl*, 8> ClassList;
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typedef llvm::SmallPtrSet<ClassDecl *, 32> ClassSet;
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ClassHierarchyAnalysis(SILModule *Mod) :
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SILAnalysis(AnalysisKind::ClassHierarchyAnalysis), M(Mod) {
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init();
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}
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~ClassHierarchyAnalysis();
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static bool classof(const SILAnalysis *S) {
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return S->getKind() == AnalysisKind::ClassHierarchyAnalysis;
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}
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virtual void invalidate(InvalidationKind K) {
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if (K >= InvalidationKind::All) {
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SubclassesCache.clear();
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init();
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}
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}
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/// \returns a list of the known direct subclasses of a class \p C in
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/// the current module.
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ClassList& getSubClasses(ClassDecl *C) { return SubclassesCache[C]; }
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/// \returns True if the class is inherited by another class in this module.
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bool inheritedInModule(ClassDecl *CD) {
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return SubclassesCache.count(CD);
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}
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virtual void invalidate(SILFunction *F, InvalidationKind K) {
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invalidate(K);
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}
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private:
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/// Compute inheritance properties.
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void init();
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/// The module
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SILModule *M;
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/// A cache that maps a class to all of its known subclasses.
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llvm::DenseMap<ClassDecl*, ClassList> SubclassesCache;
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};
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}
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#endif
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