[turbofan] Add JSStackCheck into loop bodies.

src/compiler.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/compiler.h"
 
 #include <algorithm>
 
 #include "src/ast-numbering.h"
 #include "src/bootstrapper.h"
@@ skipping 1466 matching lines @@
   if (shared->disable_optimization_reason() == kEval) {
     return MaybeHandle<Code>();
   }
 
   // TODO(mstarzinger): We cannot properly deserialize a scope chain for the
   // builtin context, hence Genesis::InstallExperimentalNatives would fail.
   if (shared->is_toplevel() && isolate->bootstrapper()->IsActive()) {
     return MaybeHandle<Code>();
   }
 
-  // TODO(titzer): Some top-level code times out because of missing interrupt
-  // checks at back-branches, these are currently marked with --no-turbo-osr.
-  if (shared->is_toplevel() && !FLAG_turbo_osr) {
-    return MaybeHandle<Code>();
-  }
-
   info->SetOptimizing(osr_ast_id, current_code);
 
   if (mode == CONCURRENT) {
     if (GetOptimizedCodeLater(info.get())) {
       info.Detach();  // The background recompile job owns this now.
       return isolate->builtins()->InOptimizationQueue();
     }
   } else {
     if (GetOptimizedCodeNow(info.get())) return info->code();
   }
@@ skipping 93 matching lines @@
 }
 
 
 #if DEBUG
 void CompilationInfo::PrintAstForTesting() {
   PrintF("--- Source from AST ---\n%s\n",
          PrettyPrinter(isolate(), zone()).PrintProgram(function()));
 }
 #endif
 } }  // namespace v8::internal