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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
40 lines
1.4 KiB
C++
40 lines
1.4 KiB
C++
//===- ClassHierarchyAnalysis.cpp - 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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#include "swift/SILAnalysis/ClassHierarchyAnalysis.h"
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#include "swift/AST/ASTContext.h"
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#include "swift/AST/Module.h"
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#include "swift/SIL/SILInstruction.h"
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#include "swift/SIL/SILValue.h"
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#include "swift/SIL/SILModule.h"
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using namespace swift;
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void ClassHierarchyAnalysis::init() {
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// For each class declaration in our V-table list:
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for (auto &VT : M->getVTableList()) {
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ClassDecl *C = VT.getClass();
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// Ignore classes that are at the top of the class hierarchy:
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if (!C->hasSuperclass())
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continue;
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// Add the superclass to the list of inherited classes.
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ClassDecl *Super = C->getSuperclass()->getClassOrBoundGenericClass();
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auto &K = SubclassesCache[Super];
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assert(std::find(K.begin(), K.end(), C) == K.end() &&
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"Class vector must be unique");
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K.push_back(C);
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}
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}
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ClassHierarchyAnalysis::~ClassHierarchyAnalysis() {}
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