Use entities in various ssa helpers.

pkg/compiler/lib/src/ssa/optimize.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 '../common/codegen.dart' show CodegenRegistry, CodegenWorkItem;
 import '../common/names.dart' show Selectors;
 import '../common/tasks.dart' show CompilerTask;
 import '../compiler.dart' show Compiler;
 import '../constants/constant_system.dart';
 import '../constants/values.dart';
@@ skipping 83 matching lines @@
         // opportunities for instruction simplification.
         new SsaInstructionSimplifier(backend, closedWorld, this, registry),
         new SsaCheckInserter(
             trustPrimitives, backend, closedWorld, boundsChecked),
       ];
       phases.forEach(runPhase);
 
       // Simplifying interceptors is not strictly just an optimization, it is
       // required for implementation correctness because the code generator
       // assumes it is always performed.
-      runPhase(
-          new SsaSimplifyInterceptors(compiler, closedWorld, work.element));
+      runPhase(new SsaSimplifyInterceptors(
+          compiler, closedWorld, work.element.enclosingClass));
 
       SsaDeadCodeEliminator dce = new SsaDeadCodeEliminator(closedWorld, this);
       runPhase(dce);
       if (codeMotion.movedCode || dce.eliminatedSideEffects) {
         phases = <OptimizationPhase>[
           new SsaTypePropagator(compiler, closedWorld),
           new SsaGlobalValueNumberer(),
           new SsaCodeMotion(),
           new SsaValueRangeAnalyzer(backend.helpers, closedWorld, this),
           new SsaInstructionSimplifier(backend, closedWorld, this, registry),
           new SsaCheckInserter(
               trustPrimitives, backend, closedWorld, boundsChecked),
-          new SsaSimplifyInterceptors(compiler, closedWorld, work.element),
+          new SsaSimplifyInterceptors(
+              compiler, closedWorld, work.element.enclosingClass),
           new SsaDeadCodeEliminator(closedWorld, this),
         ];
       } else {
         phases = <OptimizationPhase>[
           new SsaTypePropagator(compiler, closedWorld),
           // Run the simplifier to remove unneeded type checks inserted by
           // type propagation.
           new SsaInstructionSimplifier(backend, closedWorld, this, registry),
         ];
       }
@@ skipping 2624 matching lines @@
 
     keyedValues.forEach((receiver, values) {
       result.keyedValues[receiver] =
           new Map<HInstruction, HInstruction>.from(values);
     });
 
     result.nonEscapingReceivers.addAll(nonEscapingReceivers);
     return result;
   }
 }