Create frequently used symbols in the vm isolate

vm/intrinsifier_x64.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/globals.h"  // Needed here to get TARGET_ARCH_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/intrinsifier.h"
 
 #include "vm/assembler.h"
 #include "vm/assembler_macros.h"
 #include "vm/instructions.h"
 #include "vm/object_store.h"
+#include "vm/symbols.h"
 
 namespace dart {
 
 DECLARE_FLAG(bool, enable_type_checks);
 
 // When entering intrinsics code:
 // RBX: IC Data
 // R10: Arguments descriptor
 // TOS: Return address
 // The RBX, R10 registers can be destroyed only if there is no slow-path (i.e.,
@@ skipping 1141 matching lines @@
   __ ret();
   __ Bind(&is_true);
   __ LoadObject(RAX, bool_true);
   __ ret();
   return true;
 }
 
 
 static intptr_t GetOffsetForField(const char* class_name_p,
                                   const char* field_name_p) {
-  const String& class_name = String::Handle(String::NewSymbol(class_name_p));
-  const String& field_name = String::Handle(String::NewSymbol(field_name_p));
+  const String& class_name = String::Handle(Symbols::New(class_name_p));
+  const String& field_name = String::Handle(Symbols::New(field_name_p));
   const Class& cls = Class::Handle(Library::Handle(
       Library::CoreImplLibrary()).LookupClass(class_name));
   ASSERT(!cls.IsNull());
   const Field& field = Field::ZoneHandle(cls.LookupInstanceField(field_name));
   ASSERT(!field.IsNull());
   return field.Offset();
 }
 
 static const char* kFixedSizeArrayIteratorClassName = "FixedSizeArrayIterator";
 
@@ skipping 133 matching lines @@
   __ LoadObject(RAX, bool_true);
   __ ret();
   return true;
 }
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64