Implement optional parameter handling in ARM vm.

runtime/vm/object.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
@@ skipping 7642 matching lines @@
                            instrs.EntryPoint(),
                            assembler->prologue_offset(),
                            instrs.size(),
                            optimized);
 
   const ZoneGrowableArray<int>& pointer_offsets =
       assembler->GetPointerOffsets();
 
   // Allocate the code object.
   Code& code = Code::ZoneHandle(Code::New(pointer_offsets.length()));
+
+  // Clone the object pool in the old space, if necessary.
+  Array& object_pool = Array::Handle(
+      Array::MakeArray(assembler->object_pool()));
+  if (!object_pool.IsOld()) {
+    object_pool ^= Object::Clone(object_pool, Heap::kOld);
+  }
   {
     NoGCScope no_gc;
 
     // Set pointer offsets list in Code object and resolve all handles in
     // the instruction stream to raw objects.
     ASSERT(code.pointer_offsets_length() == pointer_offsets.length());
     for (int i = 0; i < pointer_offsets.length(); i++) {
       int offset_in_instrs = pointer_offsets[i];
       code.SetPointerOffsetAt(i, offset_in_instrs);
       const Object* object = region.Load<const Object*>(offset_in_instrs);
       region.Store<RawObject*>(offset_in_instrs, object->raw());
     }
 
     // Hook up Code and Instructions objects.
     instrs.set_code(code.raw());
     code.set_instructions(instrs.raw());
 
     // Set object pool in Instructions object.
-    instrs.set_object_pool(Array::MakeArray(assembler->object_pool()));
+    instrs.set_object_pool(object_pool.raw());
   }
   return code.raw();
 }
 
 
 RawCode* Code::FinalizeCode(const Function& function,
                             Assembler* assembler,
                             bool optimized) {
   // Calling ToFullyQualifiedCString is very expensive, try to avoid it.
   if (CodeObservers::AreActive()) {
@@ skipping 5926 matching lines @@
   }
   return result.raw();
 }
 
 
 const char* WeakProperty::ToCString() const {
   return "_WeakProperty";
 }
 
 }  // namespace dart