Vyacheslav Egorov
229d793602
Previously we tried to rely on the assumption that all variables would be boxed - so the machinery for setting correct catch-entry state only supported tagged values and constants. However this both leads to worse code and is not entirely correct assumption. This also: - renames various confusingly named classes: we move away from talking about "catch entry state" to "catch entry moves" - because we only record a subset of moves that needs to be performed and that does not describe the whole state; - refactors a bunch of associated code to be more readable and maintainable; - adds documentation about catch implementation in optimized code to runtime/docs/compiler; Fixes https://github.com/flutter/flutter/issues/21685. Change-Id: I03ae361a1bb7710acbd9f661ae014e663a163c59 Reviewed-on: https://dart-review.googlesource.com/74860 Commit-Queue: Vyacheslav Egorov <vegorov@google.com> Reviewed-by: Martin Kustermann <kustermann@google.com> Reviewed-by: Alexander Markov <alexmarkov@google.com>
48 lines
1.2 KiB
C++
48 lines
1.2 KiB
C++
// Copyright (c) 2015, 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 RUNTIME_VM_PROGRAM_VISITOR_H_
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#define RUNTIME_VM_PROGRAM_VISITOR_H_
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#include "vm/allocation.h"
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namespace dart {
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class Function;
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class Class;
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template <typename T>
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class Visitor : public ValueObject {
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public:
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virtual ~Visitor() {}
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virtual void Visit(const T& obj) = 0;
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};
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typedef Visitor<Function> FunctionVisitor;
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typedef Visitor<Class> ClassVisitor;
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class ProgramVisitor : public AllStatic {
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public:
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static void VisitFunctions(FunctionVisitor* visitor);
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static void VisitClasses(ClassVisitor* visitor);
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static void Dedup();
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private:
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static void ShareMegamorphicBuckets();
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static void DedupStackMaps();
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static void DedupPcDescriptors();
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NOT_IN_PRECOMPILED(static void DedupDeoptEntries());
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#if defined(DART_PRECOMPILER)
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static void DedupCatchEntryMovesMaps();
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#endif
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static void DedupCodeSourceMaps();
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static void DedupLists();
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static void DedupInstructions();
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};
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} // namespace dart
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#endif // RUNTIME_VM_PROGRAM_VISITOR_H_
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