Aske Simon Christensen
1c2d378068
For each selector, count the number of calls to the selector that are both reachable and polymorphic according to the TFA. Only include selectors in the table with non-zero counts. This reduces the dispatch table size by 30% in dart2js and by 49% in Flutter Gallery (312k memory use reduction on ARM64). Call counts are transferred in a dedicated metadata block with per-selector information. This mechanism also prepares for transferring other per-selector information in the future. Change-Id: Iba15aa4d6c50e67e53c3fd8e542123d3fc98bd07 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/132603 Reviewed-by: Alexander Markov <alexmarkov@google.com>
54 lines
2.1 KiB
Dart
54 lines
2.1 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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import 'dart:io';
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import 'package:kernel/kernel.dart' show Component, writeComponentToText;
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import 'package:kernel/binary/ast_from_binary.dart'
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show BinaryBuilderWithMetadata;
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import 'package:vm/metadata/bytecode.dart' show BytecodeMetadataRepository;
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import 'package:vm/metadata/direct_call.dart' show DirectCallMetadataRepository;
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import 'package:vm/metadata/inferred_type.dart'
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show InferredTypeMetadataRepository;
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import 'package:vm/metadata/procedure_attributes.dart'
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show ProcedureAttributesMetadataRepository;
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import 'package:vm/metadata/table_selector.dart'
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show TableSelectorMetadataRepository;
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import 'package:vm/metadata/unreachable.dart'
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show UnreachableNodeMetadataRepository;
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import 'package:vm/metadata/call_site_attributes.dart'
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show CallSiteAttributesMetadataRepository;
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final String _usage = '''
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Usage: dump_kernel input.dill output.txt
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Dumps kernel binary file with VM-specific metadata.
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''';
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main(List<String> arguments) async {
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if (arguments.length != 2) {
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print(_usage);
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exit(1);
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}
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final input = arguments[0];
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final output = arguments[1];
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final component = new Component();
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// Register VM-specific metadata.
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component.addMetadataRepository(new DirectCallMetadataRepository());
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component.addMetadataRepository(new InferredTypeMetadataRepository());
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component.addMetadataRepository(new ProcedureAttributesMetadataRepository());
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component.addMetadataRepository(new TableSelectorMetadataRepository());
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component.addMetadataRepository(new UnreachableNodeMetadataRepository());
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component.addMetadataRepository(new BytecodeMetadataRepository());
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component.addMetadataRepository(new CallSiteAttributesMetadataRepository());
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final List<int> bytes = new File(input).readAsBytesSync();
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new BinaryBuilderWithMetadata(bytes).readComponent(component);
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writeComponentToText(component, path: output, showMetadata: true);
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}
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