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 experimentalTrackAllocations;
+
+  /// The path to the file that contains the profiled allocations.
+  ///
+  /// The file must contain the Map that was produced by using
+  /// [experimentalTrackAllocations] encoded as a JSON map.
+  ///
+  /// This is an experimental feature.
+  final String experimentalAllocationsPath;
+
   // -------------------------------------------------
   // 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 34 matching lines @@
         disableInlining: _hasOption(options, Flags.disableInlining),
         disableTypeInference: _hasOption(options, Flags.disableTypeInference),
         dumpInfo: _hasOption(options, Flags.dumpInfo),
         enableExperimentalMirrors:
             _hasOption(options, Flags.enableExperimentalMirrors),
         enableMinification: _hasOption(options, Flags.minify),
         enableNativeLiveTypeAnalysis:
             !_hasOption(options, Flags.disableNativeLiveTypeAnalysis),
         enableTypeAssertions: _hasOption(options, Flags.enableCheckedMode),
         enableUserAssertions: _hasOption(options, Flags.enableCheckedMode),
+        experimentalTrackAllocations:
+            _hasOption(options, Flags.experimentalTrackAllocations),
+        experimentalAllocationsPath: _extractStringOption(
+            options, "${Flags.experimentalAllocationsPath}=", null),
         generateCodeWithCompileTimeErrors:
             _hasOption(options, Flags.generateCodeWithCompileTimeErrors),
         generateSourceMap: !_hasOption(options, Flags.noSourceMaps),
         kernelGlobalInference: _hasOption(options, Flags.kernelGlobalInference),
         outputUri: _extractUriOption(options, '--out='),
         platformConfigUri:
             _resolvePlatformConfigFromOptions(libraryRoot, options),
         preserveComments: _hasOption(options, Flags.preserveComments),
         preserveUris: _hasOption(options, Flags.preserveUris),
         resolutionInputs: resolutionInputs,
@@ skipping 45 matching lines @@
       List<String> shownPackageWarnings: null,
       bool disableInlining: false,
       bool disableTypeInference: false,
       bool dumpInfo: false,
       bool enableAssertMessage: true,
       bool enableExperimentalMirrors: false,
       bool enableMinification: false,
       bool enableNativeLiveTypeAnalysis: true,
       bool enableTypeAssertions: false,
       bool enableUserAssertions: false,
+      bool experimentalTrackAllocations: false,
+      String experimentalAllocationsPath: null,
       bool generateCodeWithCompileTimeErrors: false,
       bool generateSourceMap: true,
       bool kernelGlobalInference: false,
       Uri outputUri: null,
       Uri platformConfigUri: null,
       bool preserveComments: false,
       bool preserveUris: false,
       List<Uri> resolutionInputs: null,
       Uri resolutionOutput: null,
       bool resolveOnly: false,
@@ skipping 52 matching lines @@
         shownPackageWarnings: shownPackageWarnings,
         disableInlining: disableInlining,
         disableTypeInference: disableTypeInference,
         dumpInfo: dumpInfo,
         enableAssertMessage: enableAssertMessage,
         enableExperimentalMirrors: enableExperimentalMirrors,
         enableMinification: enableMinification,
         enableNativeLiveTypeAnalysis: enableNativeLiveTypeAnalysis,
         enableTypeAssertions: enableTypeAssertions,
         enableUserAssertions: enableUserAssertions,
+        experimentalTrackAllocations: experimentalTrackAllocations,
+        experimentalAllocationsPath: experimentalAllocationsPath,
         generateCodeWithCompileTimeErrors: generateCodeWithCompileTimeErrors,
         generateSourceMap: generateSourceMap,
         kernelGlobalInference: kernelGlobalInference,
         outputUri: outputUri,
         platformConfigUri: platformConfigUri ??
             _resolvePlatformConfig(libraryRoot, null, const []),
         preserveComments: preserveComments,
         preserveUris: preserveUris,
         resolutionInputs: resolutionInputs,
         resolutionOutput: resolutionOutput,
@@ skipping 31 matching lines @@
       List<String> shownPackageWarnings: null,
       this.disableInlining: false,
       this.disableTypeInference: false,
       this.dumpInfo: false,
       this.enableAssertMessage: true,
       this.enableExperimentalMirrors: false,
       this.enableMinification: false,
       this.enableNativeLiveTypeAnalysis: false,
       this.enableTypeAssertions: false,
       this.enableUserAssertions: false,
+      this.experimentalTrackAllocations: false,
+      this.experimentalAllocationsPath: null,
       this.generateCodeWithCompileTimeErrors: false,
       this.generateSourceMap: true,
       this.kernelGlobalInference: false,
       this.outputUri: null,
       this.platformConfigUri: null,
       this.preserveComments: false,
       this.preserveUris: false,
       this.resolutionInputs: null,
       this.resolutionOutput: null,
       this.resolveOnly: false,
@@ skipping 38 matching lines @@
       List<String> shownPackageWarnings,
       disableInlining,
       disableTypeInference,
       dumpInfo,
       enableAssertMessage,
       enableExperimentalMirrors,
       enableMinification,
       enableNativeLiveTypeAnalysis,
       enableTypeAssertions,
       enableUserAssertions,
+      experimentalTrackAllocations,
+      experimentalAllocationsPath,
       generateCodeWithCompileTimeErrors,
       generateSourceMap,
       kernelGlobalInference,
       outputUri,
       platformConfigUri,
       preserveComments,
       preserveUris,
       resolutionInputs,
       resolutionOutput,
       resolveOnly,
@@ skipping 43 matching lines @@
         enableAssertMessage: enableAssertMessage ?? options.enableAssertMessage,
         enableExperimentalMirrors:
             enableExperimentalMirrors ?? options.enableExperimentalMirrors,
         enableMinification: enableMinification ?? options.enableMinification,
         enableNativeLiveTypeAnalysis: enableNativeLiveTypeAnalysis ??
             options.enableNativeLiveTypeAnalysis,
         enableTypeAssertions:
             enableTypeAssertions ?? options.enableTypeAssertions,
         enableUserAssertions:
             enableUserAssertions ?? options.enableUserAssertions,
+        experimentalTrackAllocations: experimentalTrackAllocations ??
+            options.experimentalTrackAllocations,
+        experimentalAllocationsPath:
+            experimentalAllocationsPath ?? options.experimentalAllocationsPath,
         generateCodeWithCompileTimeErrors: generateCodeWithCompileTimeErrors ??
             options.generateCodeWithCompileTimeErrors,
         generateSourceMap: generateSourceMap ?? options.generateSourceMap,
         kernelGlobalInference:
             kernelGlobalInference ?? options.kernelGlobalInference,
         outputUri: outputUri ?? options.outputUri,
         platformConfigUri: platformConfigUri ?? options.platformConfigUri,
         preserveComments: preserveComments ?? options.preserveComments,
         preserveUris: preserveUris ?? options.preserveUris,
         resolutionInputs: resolutionInputs ?? options.resolutionInputs,
@@ skipping 111 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";