[runtime/heap] Introduce CopyFixedArrayUpTo to match CopyFixedArrayAndGrow, copying to a smaller ar…

src/factory.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/factory.h"
 
 #include "src/allocation-site-scopes.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
 #include "src/conversions.h"
@@ skipping 1023 matching lines @@
 
 
 Handle<FixedArray> Factory::CopyFixedArrayAndGrow(Handle<FixedArray> array,
                                                   int grow_by,
                                                   PretenureFlag pretenure) {
   CALL_HEAP_FUNCTION(isolate(), isolate()->heap()->CopyFixedArrayAndGrow(
                                     *array, grow_by, pretenure),
                      FixedArray);
 }
 
+Handle<FixedArray> Factory::CopyFixedArrayUpTo(Handle<FixedArray> array,
+                                               int new_len,
+                                               PretenureFlag pretenure) {
+  CALL_HEAP_FUNCTION(isolate(), isolate()->heap()->CopyFixedArrayUpTo(
+                                    *array, new_len, pretenure),
+                     FixedArray);
+}
 
 Handle<FixedArray> Factory::CopyFixedArray(Handle<FixedArray> array) {
   CALL_HEAP_FUNCTION(isolate(),
                      isolate()->heap()->CopyFixedArray(*array),
                      FixedArray);
 }
 
 
 Handle<FixedArray> Factory::CopyAndTenureFixedCOWArray(
     Handle<FixedArray> array) {
@@ skipping 1336 matching lines @@
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
 
 }  // namespace internal
 }  // namespace v8