Incremental changes from background compilation work

runtime/vm/flow_graph_compiler_x64.cc

 // Copyright (c) 2013, 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/flow_graph_compiler.h"
 
 #include "vm/ast_printer.h"
@@ skipping 980 matching lines @@
   const Function& function = parsed_function().function();
   // Load pool pointer.
 
   if (flow_graph().IsCompiledForOsr()) {
     intptr_t extra_slots = StackSize()
         - flow_graph().num_stack_locals()
         - flow_graph().num_copied_params();
     ASSERT(extra_slots >= 0);
     __ EnterOsrFrame(extra_slots * kWordSize);
   } else {
+    __ Comment("Invocation Count Check");
     const Register new_pp = R13;
     __ LoadPoolPointer(new_pp);
 
     if (CanOptimizeFunction() &&
         function.IsOptimizable() &&
         (!is_optimizing() || may_reoptimize())) {
       const Register function_reg = RDI;
       // Load function object using the callee's pool pointer.
       __ LoadFunctionFromCalleePool(function_reg, function, new_pp);
 
@@ skipping 799 matching lines @@
   __ movups(reg, Address(RSP, 0));
   __ AddImmediate(RSP, Immediate(kFpuRegisterSize));
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64