Refactor types in ssa nodes.

lib/compiler/implementation/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.
 
 class SsaCodeGeneratorTask extends CompilerTask {
   SsaCodeGeneratorTask(Compiler compiler) : super(compiler);
   String get name() => 'SSA code generator';
 
 
   String generateMethod(WorkItem work, HGraph graph) {
@@ skipping 1626 matching lines @@
       bailout(node, 'Not a string');
     } else if (node.isMutableArray()) {
       buffer.add('if (');
       checkObject(input, '!==');
       buffer.add('||');
       checkArray(input, '!==');
       buffer.add('||');
       checkImmutableArray(input);
       buffer.add(') ');
       bailout(node, 'Not a mutable array');
-    } else if (node.isArray()) {
+    } else if (node.isReadableArray()) {
       buffer.add('if (');
       checkObject(input, '!==');
       buffer.add('||');
       checkArray(input, '!==');
       buffer.add(') ');
       bailout(node, 'Not an array');
     } else if (node.isStringOrArray()) {
       buffer.add('if (');
       checkString(input, '!==');
       buffer.add(' && (');
@@ skipping 277 matching lines @@
       startBailoutSwitch();
     }
   }
 
   void endElse(HIf node) {
     if (node.elseBlock.hasGuards()) {
       endBailoutSwitch();
     }
   }
 }