fschneider@google.com
54a7410866
CHA is not only used with the receiver class, but also with other classes when doing type propagation. The optimized code has to be registered with all classes that are affected by CHA so that deoptimization occurs whenever the set of subclasses changes for these classes. R=vegorov@google.com Review URL: https://codereview.chromium.org//463103002 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@39194 260f80e4-7a28-3924-810f-c04153c831b5
64 lines
1.6 KiB
C++
64 lines
1.6 KiB
C++
// 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"
|
|
|
|
namespace dart {
|
|
|
|
class Class;
|
|
class Function;
|
|
template <typename T> class ZoneGrowableArray;
|
|
class String;
|
|
|
|
class CHA : public StackResource {
|
|
public:
|
|
explicit CHA(Isolate* isolate)
|
|
: StackResource(isolate),
|
|
isolate_(isolate),
|
|
leaf_classes_(isolate, 1),
|
|
previous_(isolate->cha()) {
|
|
isolate->set_cha(this);
|
|
}
|
|
|
|
~CHA() {
|
|
ASSERT(isolate_->cha() == this);
|
|
isolate_->set_cha(previous_);
|
|
}
|
|
|
|
// Returns true if the class has subclasses.
|
|
// Updates set of leaf classes that we register optimized code with for lazy
|
|
// deoptimization.
|
|
bool HasSubclasses(const Class& cls);
|
|
bool HasSubclasses(intptr_t cid);
|
|
|
|
// Return true if the class is implemented by some other class.
|
|
// Updates set of leaf classes that we register optimized code with for lazy
|
|
// deoptimization.
|
|
bool IsImplemented(const Class& cls);
|
|
|
|
// Returns true if any subclass of 'cls' contains the function.
|
|
// Updates set of leaf classes that we register optimized code with for lazy
|
|
// deoptimization.
|
|
bool HasOverride(const Class& cls, const String& function_name);
|
|
|
|
const GrowableArray<Class*>& leaf_classes() const {
|
|
return leaf_classes_;
|
|
}
|
|
|
|
private:
|
|
void AddToLeafClasses(const Class& cls);
|
|
|
|
Isolate* isolate_;
|
|
GrowableArray<Class*> leaf_classes_;
|
|
CHA* previous_;
|
|
};
|
|
|
|
} // namespace dart
|
|
|
|
#endif // VM_CHA_H_
|