Uses an object pool on x64

runtime/vm/runtime_entry_x64.cc

 // Copyright (c) 2011, 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/globals.h"
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/runtime_entry.h"
 
 #include "vm/assembler.h"
@@ skipping 12 matching lines @@
 void RuntimeEntry::Call(Assembler* assembler, intptr_t argument_count) const {
   if (is_leaf()) {
     ASSERT(argument_count == this->argument_count());
     ExternalLabel label(name(), GetEntryPoint());
     __ call(&label);
   } else {
     // Argument count is not checked here, but in the runtime entry for a more
     // informative error message.
     __ movq(RBX, Immediate(GetEntryPoint()));
     __ movq(R10, Immediate(argument_count));
-    __ call(&StubCode::CallToRuntimeLabel());
+    __ Call(&StubCode::CallToRuntimeLabel(), PP);
   }
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64