Alexander Markov
46983c2de9
This information could useful in AOT to omit unchecked entry points. Change-Id: I1c54720e46d578dc64f67306abdf4619a34ae122 Reviewed-on: https://dart-review.googlesource.com/c/77921 Auto-Submit: Alexander Markov <alexmarkov@google.com> Commit-Queue: Samir Jindel <sjindel@google.com> Reviewed-by: Samir Jindel <sjindel@google.com>
86 lines
2.6 KiB
Dart
86 lines
2.6 KiB
Dart
// Copyright (c) 2017, 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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library vm.metadata.procedure_attributes;
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import 'package:kernel/ast.dart';
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/// Metadata for annotating procedures with various attributes.
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class ProcedureAttributesMetadata {
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final bool hasDynamicUses;
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final bool hasThisUses;
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final bool hasNonThisUses;
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final bool hasTearOffUses;
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const ProcedureAttributesMetadata(
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{this.hasDynamicUses: true,
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this.hasThisUses: true,
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this.hasNonThisUses: true,
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this.hasTearOffUses: true});
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const ProcedureAttributesMetadata.noDynamicUses()
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: this(hasDynamicUses: false);
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@override
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String toString() {
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final attrs = <String>[];
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if (!hasDynamicUses) attrs.add('hasDynamicUses:false');
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if (!hasThisUses) attrs.add('hasThisUses:false');
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if (!hasNonThisUses) attrs.add('hasNonThisUses:false');
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if (!hasTearOffUses) attrs.add('hasTearOffUses:false');
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return attrs.join(',');
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}
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}
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/// Repository for [ProcedureAttributesMetadata].
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class ProcedureAttributesMetadataRepository
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extends MetadataRepository<ProcedureAttributesMetadata> {
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static const int kDynamicUsesBit = 1 << 0;
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static const int kNonThisUsesBit = 1 << 1;
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static const int kTearOffUsesBit = 1 << 2;
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static const int kThisUsesBit = 1 << 3;
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@override
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final String tag = 'vm.procedure-attributes.metadata';
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@override
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final Map<TreeNode, ProcedureAttributesMetadata> mapping =
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<TreeNode, ProcedureAttributesMetadata>{};
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@override
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void writeToBinary(
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ProcedureAttributesMetadata metadata, Node node, BinarySink sink) {
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int flags = 0;
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if (metadata.hasDynamicUses) {
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flags |= kDynamicUsesBit;
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}
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if (metadata.hasThisUses) {
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flags |= kThisUsesBit;
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}
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if (metadata.hasNonThisUses) {
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flags |= kNonThisUsesBit;
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}
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if (metadata.hasTearOffUses) {
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flags |= kTearOffUsesBit;
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}
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sink.writeByte(flags);
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}
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@override
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ProcedureAttributesMetadata readFromBinary(Node node, BinarySource source) {
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final int flags = source.readByte();
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final bool hasDynamicUses = (flags & kDynamicUsesBit) != 0;
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final bool hasThisUses = (flags & kThisUsesBit) != 0;
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final bool hasNonThisUses = (flags & kNonThisUsesBit) != 0;
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final bool hasTearOffUses = (flags & kTearOffUsesBit) != 0;
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return new ProcedureAttributesMetadata(
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hasDynamicUses: hasDynamicUses,
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hasThisUses: hasThisUses,
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hasNonThisUses: hasNonThisUses,
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hasTearOffUses: hasTearOffUses);
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}
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}
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