Verify AST instead of constant values.

pkg/analyzer/lib/src/summary/format.dart

 // Copyright (c) 2015, 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.
 //
 // This file has been automatically generated.  Please do not edit it manually.
 // To regenerate the file, use the script "pkg/analyzer/tool/generate_files".
 
 library analyzer.src.summary.format;
 
 import 'base.dart' as base;
@@ skipping 205 matching lines @@
 
   /**
    * Pop the top 2 values from the stack, pass them to the predefined Dart
    * function `identical`, and push the result back onto the stack.
    */
   identical,
 
   /**
    * Pop the top 2 values from the stack, evaluate `v1 == v2`, and push the
    * result back onto the stack.
-   *
-   * This is also used to represent `v1 != v2`, by composition with [not].
    */
   equal,
 
   /**
+   * Pop the top 2 values from the stack, evaluate `v1 != v2`, and push the
+   * result back onto the stack.
+   */
+  notEqual,
+
+  /**
    * Pop the top value from the stack, compute its boolean negation, and push
    * the result back onto the stack.
    */
   not,
 
   /**
    * Pop the top 2 values from the stack, compute `v1 && v2`, and push the
    * result back onto the stack.
    */
   and,
@@ skipping 5857 matching lines @@
     "type": type,
     "constExpr": constExpr,
     "isStatic": isStatic,
     "isFinal": isFinal,
     "isConst": isConst,
     "propagatedTypeSlot": propagatedTypeSlot,
     "inferredTypeSlot": inferredTypeSlot,
   };
 }