Ryan Macnak
e048774776
CompileOnceHelloHtml (ARMv7HF) +17.194% DeltaBlueClosures (ARMv7HF) +28.379% DeltaBlue (ARMv7HF) +30.190% precompiled dart2js arm 19071745 -> 19504726 (+2.3%) R=fschneider@google.com Review URL: https://codereview.chromium.org/1867913004 .
67 lines
1.9 KiB
C++
67 lines
1.9 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef VM_CHA_H_
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#define VM_CHA_H_
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#include "vm/allocation.h"
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#include "vm/growable_array.h"
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#include "vm/thread.h"
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namespace dart {
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class Class;
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class Function;
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template <typename T> class ZoneGrowableArray;
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class String;
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class CHA : public StackResource {
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public:
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explicit CHA(Thread* thread)
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: StackResource(thread),
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thread_(thread),
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leaf_classes_(thread->zone(), 1),
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previous_(thread->cha()) {
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thread->set_cha(this);
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}
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~CHA() {
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ASSERT(thread_->cha() == this);
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thread_->set_cha(previous_);
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}
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// Returns true if the class has subclasses.
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static bool HasSubclasses(const Class& cls);
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bool HasSubclasses(intptr_t cid) const;
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// Collect the concrete subclasses of 'cls' into 'class_ids'. Return true if
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// the result is valid (may be invalid because we don't track the subclasses
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// of classes allocated in the VM isolate or class Object).
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bool ConcreteSubclasses(const Class& cls, GrowableArray<intptr_t> *class_ids);
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// Return true if the class is implemented by some other class.
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static bool IsImplemented(const Class& cls);
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// Returns true if any subclass of 'cls' contains the function.
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bool HasOverride(const Class& cls, const String& function_name);
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const GrowableArray<Class*>& leaf_classes() const {
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return leaf_classes_;
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}
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// Adds class 'cls' to the list of guarded leaf classes, deoptimization occurs
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// if any of those leaf classes gets subclassed through later loaded/finalized
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// libraries. Only classes that were used for CHA optimizations are added.
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void AddToLeafClasses(const Class& cls);
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private:
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Thread* thread_;
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GrowableArray<Class*> leaf_classes_;
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CHA* previous_;
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};
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} // namespace dart
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#endif // VM_CHA_H_
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