Make hashCode a getter and not a method.

lib/compiler/implementation/ssa/value_set.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.
 
 class ValueSet {
   int size = 0;
   List<HInstruction> table;
   ValueSetNode collisions;
   ValueSet() : table = new List<HInstruction>(8);
 
@@ skipping 20 matching lines @@
   }
 
   HInstruction lookup(HInstruction instruction) {
     int hashCode = instruction.gvnHashCode();
     int index = hashCode % table.length;
     // Look in the hash table.
     HInstruction probe = table[index];
     if (probe != null && probe.gvnEquals(instruction)) return probe;
     // Look in the collisions list.
     for (ValueSetNode node = collisions; node != null; node = node.next) {
-      if (node.hashCode() == hashCode) {
+      if (node.hashCode == hashCode) {
         HInstruction cached = node.value;
         if (cached.gvnEquals(instruction)) return cached;
       }
     }
     return null;
   }
 
   void kill(int flags) {
     if (flags == 0) return;
     int depends = HInstruction.computeDependsOnFlags(flags);
@@ skipping 90 matching lines @@
     // Make sure we preserved all elements and that no resizing
     // happened as part of this resizing.
     assert(size == oldSize);
     assert(table.length == capacity);
   }
 }
 
 class ValueSetNode {
   final HInstruction value;
   final int hash;
-  int hashCode() => hash;
+  int get hashCode => hash;
   ValueSetNode next;
   ValueSetNode(this.value, this.hash, this.next);
 }