[generators] Get better clusterfuzz coverage.

test/mjsunit/harmony/generators-turbo.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: --ignition-generators --harmony-do-expressions
-// Flags: --allow-natives-syntax
+// Flags: --ignition --ignition-generators --harmony-do-expressions
+// Flags: --allow-natives-syntax --turbo --turbo-from-bytecode
+
+
+// This file is identical to mjsunit/harmony/generators.js, except for its Flags
+// lines. The purpose is to explicitly mention --turbo-from-bytecode such that
+// Clusterfuzz can thoroughly test the new generators implementation.
 
 
 function MaybeOptimizeOrDeoptimize(f) {
   let x = Math.random();  // --random-seed makes this deterministic
   if (x <= 0.33) {
     %OptimizeFunctionOnNextCall(f);
   } else if (x <= 0.66) {
     %DeoptimizeFunction(f);
   }
 }
@@ skipping 614 matching lines @@
     while (true) {
       if (true || false) yield 42;
       continue;
     }
   }
   g = foo();
   assertEquals({value: 42, done: false}, Next(g));
   assertEquals({value: 42, done: false}, Next(g));
   assertEquals({value: 42, done: false}, Next(g));
 }