Revert of Remove obsolete JSFunction::IsOptimizable predicate.

src/runtime-profiler.cc

 // Copyright 2012 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.
 
 #include "src/v8.h"
 
 #include "src/runtime-profiler.h"
 
 #include "src/assembler.h"
 #include "src/base/platform/platform.h"
@@ skipping 70 matching lines @@
     *type_info_percentage = 100 * *ic_with_type_info_count / *ic_total_count;
     *generic_percentage = 100 * *ic_generic_count / *ic_total_count;
   } else {
     *type_info_percentage = 100;  // Compared against lower bound.
     *generic_percentage = 0;      // Compared against upper bound.
   }
 }
 
 
 void RuntimeProfiler::Optimize(JSFunction* function, const char* reason) {
+  DCHECK(function->IsOptimizable());
+
   if (FLAG_trace_opt && function->PassesFilter(FLAG_hydrogen_filter)) {
     PrintF("[marking ");
     function->ShortPrint();
     PrintF(" for recompilation, reason: %s", reason);
     if (FLAG_type_info_threshold > 0) {
       int typeinfo, generic, total, type_percentage, generic_percentage;
       GetICCounts(function->shared(), &typeinfo, &generic, &total,
                   &type_percentage, &generic_percentage);
       PrintF(", ICs with typeinfo: %d/%d (%d%%)", typeinfo, total,
              type_percentage);
@@ skipping 107 matching lines @@
         int ticks = shared_code->profiler_ticks();
         if (ticks >= kProfilerTicksBeforeReenablingOptimization) {
           shared_code->set_profiler_ticks(0);
           shared->TryReenableOptimization();
         } else {
           shared_code->set_profiler_ticks(ticks + 1);
         }
       }
       continue;
     }
-    if (function->IsOptimized()) continue;
+    if (!function->IsOptimizable()) continue;
 
     int ticks = shared_code->profiler_ticks();
 
     if (ticks >= kProfilerTicksBeforeOptimization) {
       int typeinfo, generic, total, type_percentage, generic_percentage;
       GetICCounts(shared, &typeinfo, &generic, &total, &type_percentage,
                   &generic_percentage);
       if (type_percentage >= FLAG_type_info_threshold &&
           generic_percentage <= FLAG_generic_ic_threshold) {
         // If this particular function hasn't had any ICs patched for enough
@@ skipping 25 matching lines @@
       }
     } else {
       shared_code->set_profiler_ticks(ticks + 1);
     }
   }
   any_ic_changed_ = false;
 }
 
 
 } }  // namespace v8::internal