[tests] Make assertOptimized()/assertUnoptimized() great again.

test/mjsunit/regress/regress-crbug-594183.js

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --allow-natives-syntax --crankshaft --no-always-opt
 
 var global = {}
 
 var fish = [
   {'name': 'foo'},
@@ skipping 61 matching lines @@
 
 inferrable_store(0);
 inferrable_store(0);
 %OptimizeFunctionOnNextCall(inferrable_store);
 inferrable_store(0);
 assertOptimized(inferrable_store);
 // If |inferrable_store| emitted a generic keyed store, it won't deopt upon
 // seeing a property name key. It should have inferred a receiver map and
 // emitted an elements store, however.
 inferrable_store("deopt");
-assertUnoptimized(inferrable_store);
+
+// TurboFan is not sophisticated enough to use key type provided by ICs.
+if (!isTurboFanned(inferrable_store)) {
+  assertUnoptimized(inferrable_store);
+}