Even less reliance on Compiler.closedWorld

pkg/compiler/lib/src/ssa/codegen_helpers.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 '../compiler.dart' show Compiler;
 import '../constants/values.dart';
 import '../elements/elements.dart';
 import '../js_backend/js_backend.dart';
 import '../types/types.dart';
 import '../universe/selector.dart' show Selector;
 import '../world.dart' show ClosedWorld;
 import 'nodes.dart';
 
 /**
  * Replaces some instructions with specialized versions to make codegen easier.
  * Caches codegen information on nodes.
  */
 class SsaInstructionSelection extends HBaseVisitor {
   final Compiler compiler;
+  final ClosedWorld closedWorld;
   HGraph graph;
 
-  SsaInstructionSelection(this.compiler);
+  SsaInstructionSelection(this.compiler, this.closedWorld);
 
   JavaScriptBackend get backend => compiler.backend;
 
-  ClosedWorld get closedWorld => compiler.closedWorld;
-
   void visitGraph(HGraph graph) {
     this.graph = graph;
     visitDominatorTree(graph);
   }
 
   visitBasicBlock(HBasicBlock block) {
     HInstruction instruction = block.first;
     while (instruction != null) {
       HInstruction next = instruction.next;
       HInstruction replacement = instruction.accept(this);
@@ skipping 61 matching lines @@
 
   HInstruction visitInvokeDynamic(HInvokeDynamic node) {
     if (node.isInterceptedCall) {
       tryReplaceInterceptorWithDummy(node, node.selector, node.mask);
     }
     return node;
   }
 
   HInstruction visitInvokeSuper(HInvokeSuper node) {
     if (node.isInterceptedCall) {
-      TypeMask mask = node.getDartReceiver(compiler).instructionType;
+      TypeMask mask = node.getDartReceiver(closedWorld).instructionType;
       tryReplaceInterceptorWithDummy(node, node.selector, mask);
     }
     return node;
   }
 
   void tryReplaceInterceptorWithDummy(
       HInvoke node, Selector selector, TypeMask mask) {
     // Calls of the form
     //
     //     a.foo$1(a, x)
@@ skipping 678 matching lines @@
     }
 
     // If [thenInput] is defined in the first predecessor, then it is only used
     // by [phi] and can be generated at use site.
     if (identical(thenInput.block, end.predecessors[0])) {
       assert(thenInput.usedBy.length == 1);
       markAsGenerateAtUseSite(thenInput);
     }
   }
 }