[compiler] Move ensuring deoptimization support to backends.

src/objects.cc

 // Copyright 2015 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/objects.h"
 
 #include <cmath>
 #include <iomanip>
 #include <sstream>
 
@@ skipping 13506 matching lines @@
   set_ic_age(new_ic_age);
   if (code()->kind() == Code::FUNCTION) {
     code()->set_profiler_ticks(0);
     if (optimization_disabled() &&
         opt_count() >= FLAG_max_opt_count) {
       // Re-enable optimizations if they were disabled due to opt_count limit.
       set_optimization_disabled(false);
     }
     set_opt_count(0);
     set_deopt_count(0);
+  } else if (code()->is_interpreter_entry_trampoline()) {
+    // TODO(4280): We might want to consider resetting profiler ticks on the
+    // bytecode as well as re-enabling optimization similar to the above case.

[rmcilroy, 2016/04/15 10:11:17]

Could we do this TODO as well? I think it makes sense to treat both Ignition and
FCG the same here.

[Michael Starzinger, 2016/04/15 10:40:44]

Done.

+    set_opt_count(0);
+    set_deopt_count(0);
   }
 }
 
 
 int SharedFunctionInfo::SearchOptimizedCodeMapEntry(Context* native_context,
                                                     BailoutId osr_ast_id) {
   DisallowHeapAllocation no_gc;
   DCHECK(native_context->IsNativeContext());
   if (!OptimizedCodeMapIsCleared()) {
     FixedArray* optimized_code_map = this->optimized_code_map();
@@ skipping 5842 matching lines @@
   if (cell->value() != *new_value) {
     cell->set_value(*new_value);
     Isolate* isolate = cell->GetIsolate();
     cell->dependent_code()->DeoptimizeDependentCodeGroup(
         isolate, DependentCode::kPropertyCellChangedGroup);
   }
 }
 
 }  // namespace internal
 }  // namespace v8