Track fields which are known to be always set to integer constants

lib/compiler/implementation/compiler.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.
 
 
 /**
  * If true, print a warning for each method that was resolved, but not
  * compiled.
  */
 final bool REPORT_EXCESS_RESOLUTION = false;
@@ skipping 437 matching lines @@
     assert(world.checkNoEnqueuedInvokedInstanceMethods());
     world.registerFieldClosureInvocations();
   }
 
   processRecompilationQueue(Enqueuer world) {
     pass = 2;
     while (!world.recompilationCandidates.isEmpty()) {
       WorkItem work = world.recompilationCandidates.next();
       var oldCode = world.universe.generatedCode[work.element];
       world.universe.generatedCode.remove(work.element);
+      world.universe.generatedBailoutCode.remove(work.element);
       withCurrentElement(work.element, () => work.run(this, world));
       var newCode = world.universe.generatedCode[work.element];
       if (REPORT_PASS2_OPTIMIZATIONS && newCode != oldCode) {
         log("Pass 2 optimization:");
         log("Before:\n$oldCode");
         log("After:\n$newCode");
       }
     }
   }
 
@@ skipping 270 matching lines @@
     // invariant that endOffset > beginOffset, but for EOF the
     // charoffset of the next token may be [beginOffset]. This can
     // also happen for synthetized tokens that are produced during
     // error handling.
     final endOffset =
       Math.max((end.next !== null) ? end.next.charOffset : 0, beginOffset + 1);
     assert(endOffset > beginOffset);
     return f(beginOffset, endOffset);
   }
 }