blob: fac6577bc26c9981178944a628ab0217ebbdaca9 [file] [log] [blame]
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#ifndef VM_CHA_H_
#define VM_CHA_H_
#include "vm/allocation.h"
#include "vm/growable_array.h"
#include "vm/thread.h"
namespace dart {
class Class;
class Function;
template <typename T> class ZoneGrowableArray;
class String;
class CHA : public StackResource {
explicit CHA(Thread* thread)
: StackResource(thread),
leaf_classes_(thread->zone(), 1),
previous_(thread->cha()) {
~CHA() {
ASSERT(thread_->cha() == this);
// Returns true if the class has subclasses.
static bool HasSubclasses(const Class& cls);
bool HasSubclasses(intptr_t cid) const;
// Return true if the class is implemented by some other class.
static bool IsImplemented(const Class& cls);
// Returns true if any subclass of 'cls' contains the function.
bool HasOverride(const Class& cls, const String& function_name);
const GrowableArray<Class*>& leaf_classes() const {
return leaf_classes_;
// Adds class 'cls' to the list of guarded leaf classes, deoptimization occurs
// if any of those leaf classes gets subclassed through later loaded/finalized
// libraries. Only classes that were used for CHA optimizations are added.
void AddToLeafClasses(const Class& cls);
Thread* thread_;
GrowableArray<Class*> leaf_classes_;
CHA* previous_;
} // namespace dart
#endif // VM_CHA_H_