Optimize AOT's switchable calls for the monomorphic case.

runtime/vm/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/compiler.h"
 
 #include "vm/assembler.h"
 
 #include "vm/ast_printer.h"
 #include "vm/block_scheduler.h"
@@ skipping 1306 matching lines @@
                LanguageError::Cast(error).kind() != Report::kBailout);
         return error.raw();
       }
     }
 
     per_compile_timer.Stop();
 
     if (trace_compiler && success) {
       THR_Print("--> '%s' entry: %#" Px " size: %" Pd " time: %" Pd64 " us\n",
                 function.ToFullyQualifiedCString(),
-                Code::Handle(function.CurrentCode()).EntryPoint(),
+                Code::Handle(function.CurrentCode()).PayloadStart(),
                 Code::Handle(function.CurrentCode()).Size(),
                 per_compile_timer.TotalElapsedTime());
     }
 
     if (FLAG_support_debugger) {
       isolate->debugger()->NotifyCompilation(function);
     }
 
     if (FLAG_disassemble && FlowGraphPrinter::ShouldPrint(function)) {
       SafepointOperationScope safepoint_scope(thread);
@@ skipping 841 matching lines @@
 
 
 bool BackgroundCompiler::IsDisabled() {
   UNREACHABLE();
   return true;
 }
 
 #endif  // DART_PRECOMPILED_RUNTIME
 
 }  // namespace dart