Add ConstantUse to WorldImpact

pkg/compiler/lib/src/ssa/codegen.dart

 // Copyright (c) 2012, 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.
 
 import 'dart:math' as math;
 import '../common.dart';
 import '../common/codegen.dart' show CodegenRegistry, CodegenWorkItem;
 import '../common/tasks.dart' show CompilerTask;
 import '../compiler.dart' show Compiler;
 import '../constants/constant_system.dart';
@@ skipping 11 matching lines @@
 import '../elements/types.dart';
 import '../io/source_information.dart';
 import '../js/js.dart' as js;
 import '../js_backend/backend_helpers.dart' show BackendHelpers;
 import '../js_backend/js_backend.dart';
 import '../js_emitter/js_emitter.dart' show NativeEmitter;
 import '../native/native.dart' as native;
 import '../types/types.dart';
 import '../universe/call_structure.dart' show CallStructure;
 import '../universe/selector.dart' show Selector;
-import '../universe/use.dart' show DynamicUse, StaticUse, TypeUse;
+import '../universe/use.dart' show ConstantUse, DynamicUse, StaticUse, TypeUse;
 import '../util/util.dart';
 import '../world.dart' show ClosedWorld;
 import 'codegen_helpers.dart';
 import 'nodes.dart';
 import 'variable_allocator.dart';
 
 class SsaCodeGeneratorTask extends CompilerTask {
   final JavaScriptBackend backend;
   final Compiler compiler;
   final SourceInformationStrategy sourceInformationFactory;
@@ skipping 2047 matching lines @@
       // TODO(johnniwinther): Support source information on synthetic constants.
       expression = expression.withSourceInformation(sourceInformation);
     }
     push(expression);
   }
 
   visitConstant(HConstant node) {
     assert(isGenerateAtUseSite(node));
     generateConstant(node.constant, node.sourceInformation);
 
-    registry.registerCompileTimeConstant(node.constant);
+    registry.registerConstantUse(new ConstantUse.literal(node.constant));
   }
 
   visitNot(HNot node) {
     assert(node.inputs.length == 1);
     generateNot(node.inputs[0], node.sourceInformation);
   }
 
   static String mapRelationalOperator(String op, bool inverse) {
     Map<String, String> inverseOperator = const <String, String>{
       "==": "!=",
@@ skipping 1017 matching lines @@
     registry.registerStaticUse(new StaticUse.staticInvoke(
         helper, new CallStructure.unnamed(argumentCount)));
     return backend.emitter.staticFunctionAccess(helper);
   }
 
   @override
   void visitRef(HRef node) {
     visit(node.value);
   }
 }