[runtime] split up loops with HandleScopes

src/runtime/runtime-strings.cc

 // Copyright 2014 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/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/conversions-inl.h"
 #include "src/isolate-inl.h"
 #include "src/regexp/jsregexp-inl.h"
@@ skipping 353 matching lines @@
   }
 
   RegExpImpl::SetLastMatchInfo(regexp_info, subject, capture_count,
                                global_cache.LastSuccessfulMatch());
 
   int matches = offsets.length() / 2;
   Handle<FixedArray> elements = isolate->factory()->NewFixedArray(matches);
   Handle<String> substring =
       isolate->factory()->NewSubString(subject, offsets.at(0), offsets.at(1));
   elements->set(0, *substring);
-  for (int i = 1; i < matches; i++) {
-    HandleScope temp_scope(isolate);
+  FOR_WITH_HANDLE_SCOPE(isolate, int, i = 1, i, i < matches, i++, {
     int from = offsets.at(i * 2);
     int to = offsets.at(i * 2 + 1);
     Handle<String> substring =
         isolate->factory()->NewProperSubString(subject, from, to);
     elements->set(i, *substring);
-  }
+  });
   Handle<JSArray> result = isolate->factory()->NewJSArrayWithElements(elements);
   result->set_length(Smi::FromInt(matches));
   return *result;
 }
 
 
 RUNTIME_FUNCTION(Runtime_StringCharCodeAtRT) {
   HandleScope handle_scope(isolate);
   DCHECK(args.length() == 2);
 
@@ skipping 927 matching lines @@
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 2);
   if (!args[0]->IsString()) return isolate->heap()->undefined_value();
   if (!args[1]->IsNumber()) return isolate->heap()->undefined_value();
   if (std::isinf(args.number_at(1))) return isolate->heap()->nan_value();
   return __RT_impl_Runtime_StringCharCodeAtRT(args, isolate);
 }
 
 }  // namespace internal
 }  // namespace v8