Create frequently used symbols in the vm isolate

vm/flow_graph_compiler.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_XXX.
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/dart_entry.h"
 #include "vm/debugger.h"
 #include "vm/il_printer.h"
 #include "vm/intrinsifier.h"
 #include "vm/locations.h"
 #include "vm/longjump.h"
 #include "vm/object_store.h"
 #include "vm/parser.h"
 #include "vm/stub_code.h"
+#include "vm/symbols.h"
 
 namespace dart {
 
 DEFINE_FLAG(bool, print_scopes, false, "Print scopes of local variables.");
 DEFINE_FLAG(bool, trace_functions, false, "Trace entry of each function.");
 DECLARE_FLAG(bool, code_comments);
 DECLARE_FLAG(bool, enable_type_checks);
 DECLARE_FLAG(bool, intrinsify);
 DECLARE_FLAG(bool, report_usage_count);
 DECLARE_FLAG(bool, trace_functions);
@@ skipping 375 matching lines @@
 void FlowGraphCompiler::EmitComment(Instruction* instr) {
   char buffer[256];
   BufferFormatter f(buffer, sizeof(buffer));
   instr->PrintTo(&f);
   assembler()->Comment("@%d: %s", instr->cid(), buffer);
 }
 
 
 void FlowGraphCompiler::EmitLoadIndexedGeneric(LoadIndexedComp* comp) {
   const String& function_name =
-      String::ZoneHandle(String::NewSymbol(Token::Str(Token::kINDEX)));
+      String::ZoneHandle(Symbols::New(Token::Str(Token::kINDEX)));
 
   AddCurrentDescriptor(PcDescriptors::kDeopt,
                        comp->cid(),
                        comp->token_pos(),
                        comp->try_index());
 
   const intptr_t kNumArguments = 2;
   const intptr_t kNumArgsChecked = 1;  // Type-feedback.
   GenerateInstanceCall(comp->cid(),
                        comp->token_pos(),
@@ skipping 367 matching lines @@
       return;
     }
   }
 
   // This move is not blocked.
   EmitMove(index);
 }
 
 
 }  // namespace dart