dart2js: Measure time of individual optimization passes.

pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart

 // Copyright (c) 2013, 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.ir_builder_task;
 
 import '../closure.dart' as closurelib;
 import '../closure.dart' hide ClosureScope;
 import '../common/names.dart' show
     Names,
@@ skipping 57 matching lines @@
   String bailoutMessage = null;
 
   /// If not null, this function will be called with for each
   /// [ir.FunctionDefinition] node that has been built.
   IrBuilderCallback builderCallback;
 
   IrBuilderTask(Compiler compiler, this.sourceInformationStrategy,
       [this.builderCallback])
       : super(compiler);
 
-  String get name => 'IR builder';
+  String get name => 'CPS builder';
 
   ir.FunctionDefinition buildNode(AstElement element) {
     return measure(() {
       bailoutMessage = null;
 
       TreeElements elementsMapping = element.resolvedAst.elements;
       element = element.implementation;
       return compiler.withCurrentElement(element, () {
         SourceInformationBuilder sourceInformationBuilder =
             sourceInformationStrategy.createBuilderForContext(element);
@@ skipping 3481 matching lines @@
     if (compiler.backend.isForeign(function)) {
       return handleForeignCode(node, function, argumentList, callStructure);
     } else {
       return irBuilder.buildStaticFunctionInvocation(function, callStructure,
           translateStaticArguments(argumentList, function, callStructure),
           sourceInformation:
               sourceInformationBuilder.buildCall(node, node.selector));
     }
   }
 }