Serialize and process patch metadata

pkg/compiler/lib/src/js_backend/backend.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.
 
 part of js_backend;
 
 const VERBOSE_OPTIMIZER_HINTS = false;
 
 class JavaScriptItemCompilationContext extends ItemCompilationContext {
   final Set<HInstruction> boundsChecked = new Set<HInstruction>();
@@ skipping 22 matching lines @@
   static const int _canInlineInLoopMustNotOutside = 2;
   // May-inline means that we know that it can be inlined inside a loop, but
   // don't know about the general case yet.
   static const int _canInlineInLoopMayInlineOutside = 3;
   static const int _canInline = 4;
   static const int _mustInline = 5;
 
   final Map<FunctionElement, int> _cachedDecisions =
       new Map<FunctionElement, int>();
 
+  /// Returns the current cache decision. This should only be used for testing.
+  int getCurrentCacheDecisionForTesting(Element element) {
+    return _cachedDecisions[element];
+  }
+
   // Returns `true`/`false` if we have a cached decision.
   // Returns `null` otherwise.
   bool canInline(FunctionElement element, {bool insideLoop}) {
     int decision = _cachedDecisions[element];
 
     if (decision == null) {
       // These synthetic elements are not yet present when we initially compute
       // this cache from metadata annotations, so look for their parent.
       if (element is ConstructorBodyElement) {
         ConstructorBodyElement body = element;
@@ skipping 3062 matching lines @@
 
   @override
   void onImpactUsed(ImpactUseCase impactUse) {
     if (impactUse == DeferredLoadTask.IMPACT_USE && !supportSerialization) {
       // TODO(johnniwinther): Allow emptying when serialization has been
       // performed.
       resolution.emptyCache();
     }
   }
 }