Port count-based profiler to x64

src/runtime.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 8340 matching lines @@
     }
   }
 
   // Revert to the original stack checks in the original unoptimized code.
   if (FLAG_trace_osr) {
     PrintF("[restoring original stack checks in ");
     function->PrintName();
     PrintF("]\n");
   }
   Handle<Code> check_code;
-#if defined(V8_TARGET_ARCH_IA32) || \
-    defined(V8_TARGET_ARCH_ARM) || \
-    defined(V8_TARGET_ARCH_MIPS)
   if (FLAG_count_based_interrupts) {
     InterruptStub interrupt_stub;
     check_code = interrupt_stub.GetCode();
   } else  // NOLINT
-#endif
   {  // NOLINT
     StackCheckStub check_stub;
     check_code = check_stub.GetCode();
   }
   Handle<Code> replacement_code = isolate->builtins()->OnStackReplacement();
   Deoptimizer::RevertStackCheckCode(*unoptimized,
                                     *check_code,
                                     *replacement_code);
 
   // Allow OSR only at nesting level zero again.
@@ skipping 4968 matching lines @@
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "Runtime::PerformGC");
   }
 }
 
 
 } }  // namespace v8::internal