Add support for profile-based startup optimizations.

pkg/compiler/lib/src/options.dart

 // Copyright (c) 2016, 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.
 
 library dart2js.src.options;
 
 import '../compiler.dart' show PackagesDiscoveryProvider;
 import 'commandline_options.dart' show Flags;
 
 /// Options used for controlling diagnostic messages.
@@ skipping 212 matching lines @@
   final bool useNewSourceInfo;
 
   /// Whether the user requested to use the fast startup emitter. The full
   /// emitter might still be used if the program uses dart:mirrors.
   final bool useStartupEmitter;
 
   /// Enable verbose printing during compilation. Includes progress messages
   /// during each phase and a time-breakdown between phases at the end.
   final bool verbose;
 
+  /// Track allocations in the JS output.
+  ///
+  /// This is an experimental feature.
+  final bool trackAllocations;
+
   // -------------------------------------------------
   // Options for deprecated features
   // -------------------------------------------------
   // TODO(sigmund): delete these as we delete the underlying features
 
   /// Whether to preserve comments while scanning (only use for dart:mirrors).
   final bool preserveComments;
 
   /// Strip option used by dart2dart.
   final List<String> strips;
@@ skipping 49 matching lines @@
         platformConfigUri:
             _resolvePlatformConfigFromOptions(libraryRoot, options),
         preserveComments: _hasOption(options, Flags.preserveComments),
         preserveUris: _hasOption(options, Flags.preserveUris),
         resolutionInputs: resolutionInputs,
         resolutionOutput: resolutionOutput,
         resolveOnly: _hasOption(options, Flags.resolveOnly),
         sourceMapUri: _extractUriOption(options, '--source-map='),
         strips: _extractCsvOption(options, '--force-strip='),
         testMode: _hasOption(options, Flags.testMode),
+        trackAllocations: _hasOption(options, Flags.trackAllocations),
         trustJSInteropTypeAnnotations:
             _hasOption(options, Flags.trustJSInteropTypeAnnotations),
         trustPrimitives: _hasOption(options, Flags.trustPrimitives),
         trustTypeAnnotations: _hasOption(options, Flags.trustTypeAnnotations),
         useContentSecurityPolicy:
             _hasOption(options, Flags.useContentSecurityPolicy),
         useKernel: _hasOption(options, Flags.useKernel),
         loadFromDill: _hasOption(options, Flags.loadFromDill),
         useFrequencyNamer:
             !_hasOption(options, Flags.noFrequencyBasedMinification),
@@ skipping 43 matching lines @@
       Uri outputUri: null,
       Uri platformConfigUri: null,
       bool preserveComments: false,
       bool preserveUris: false,
       List<Uri> resolutionInputs: null,
       Uri resolutionOutput: null,
       bool resolveOnly: false,
       Uri sourceMapUri: null,
       List<String> strips: const [],
       bool testMode: false,
+      bool trackAllocations: false,
       bool trustJSInteropTypeAnnotations: false,
       bool trustPrimitives: false,
       bool trustTypeAnnotations: false,
       bool useContentSecurityPolicy: false,
       bool useKernel: false,
       bool loadFromDill: false,
       bool useFrequencyNamer: true,
       bool useMultiSourceInfo: false,
       bool useNewSourceInfo: false,
       bool useStartupEmitter: false,
@@ skipping 53 matching lines @@
         platformConfigUri: platformConfigUri ??
             _resolvePlatformConfig(libraryRoot, null, const []),
         preserveComments: preserveComments,
         preserveUris: preserveUris,
         resolutionInputs: resolutionInputs,
         resolutionOutput: resolutionOutput,
         resolveOnly: resolveOnly,
         sourceMapUri: sourceMapUri,
         strips: strips,
         testMode: testMode,
+        trackAllocations: trackAllocations,
         trustJSInteropTypeAnnotations: trustJSInteropTypeAnnotations,
         trustPrimitives: trustPrimitives,
         trustTypeAnnotations: trustTypeAnnotations,
         useContentSecurityPolicy: useContentSecurityPolicy,
         useKernel: useKernel,
         loadFromDill: loadFromDill,
         useFrequencyNamer: useFrequencyNamer,
         useMultiSourceInfo: useMultiSourceInfo,
         useNewSourceInfo: useNewSourceInfo,
         useStartupEmitter: useStartupEmitter,
@@ skipping 31 matching lines @@
       this.platformConfigUri: null,
       this.preserveComments: false,
       this.preserveUris: false,
       this.resolutionInputs: null,
       this.resolutionOutput: null,
       this.resolveOnly: false,
       this.compileOnly: false,
       this.sourceMapUri: null,
       this.strips: const [],
       this.testMode: false,
+      this.trackAllocations: false,
       this.trustJSInteropTypeAnnotations: false,
       this.trustPrimitives: false,
       this.trustTypeAnnotations: false,
       this.useContentSecurityPolicy: false,
       this.useKernel: false,
       this.loadFromDill: false,
       this.useFrequencyNamer: false,
       this.useMultiSourceInfo: false,
       this.useNewSourceInfo: false,
       this.useStartupEmitter: false,
@@ skipping 38 matching lines @@
       platformConfigUri,
       preserveComments,
       preserveUris,
       resolutionInputs,
       resolutionOutput,
       resolveOnly,
       compileOnly,
       sourceMapUri,
       strips,
       testMode,
+      trackAllocations,
       trustJSInteropTypeAnnotations,
       trustPrimitives,
       trustTypeAnnotations,
       useContentSecurityPolicy,
       useKernel,
       loadFromDill,
       useFrequencyNamer,
       useMultiSourceInfo,
       useNewSourceInfo,
       useStartupEmitter,
@@ skipping 45 matching lines @@
         platformConfigUri: platformConfigUri ?? options.platformConfigUri,
         preserveComments: preserveComments ?? options.preserveComments,
         preserveUris: preserveUris ?? options.preserveUris,
         resolutionInputs: resolutionInputs ?? options.resolutionInputs,
         resolutionOutput: resolutionOutput ?? options.resolutionOutput,
         resolveOnly: resolveOnly ?? options.resolveOnly,
         compileOnly: compileOnly ?? options.compileOnly,
         sourceMapUri: sourceMapUri ?? options.sourceMapUri,
         strips: strips ?? options.strips,
         testMode: testMode ?? options.testMode,
+        trackAllocations: trackAllocations ?? options.trackAllocations,
         trustJSInteropTypeAnnotations: trustJSInteropTypeAnnotations ??
             options.trustJSInteropTypeAnnotations,
         trustPrimitives: trustPrimitives ?? options.trustPrimitives,
         trustTypeAnnotations:
             trustTypeAnnotations ?? options.trustTypeAnnotations,
         useContentSecurityPolicy:
             useContentSecurityPolicy ?? options.useContentSecurityPolicy,
         useKernel: useKernel ?? options.useKernel,
         loadFromDill: loadFromDill ?? options.loadFromDill,
         useFrequencyNamer: useFrequencyNamer ?? options.useFrequencyNamer,
@@ skipping 95 matching lines @@
       _extractStringOption(options, "--platform-config=", null),
       _extractCsvOption(options, '--categories='));
 }
 
 /// Locations of the platform descriptor files relative to the library root.
 const String _clientPlatform = "lib/dart_client.platform";
 const String _serverPlatform = "lib/dart_server.platform";
 const String _sharedPlatform = "lib/dart_shared.platform";
 
 const String _UNDETERMINED_BUILD_ID = "build number could not be determined";