src/share/vm/c1/c1_LIRAssembler.cpp

rev 10271 : 8147844: new method j.l.Runtime.onSpinWait() and the corresponding x86 hotspot instrinsic
Summary: adds c1 & c2 x86 intrinsics for j.l.Runtime.onSpinWait() that utilize the PAUSE instruction
Reviewed-by: iveresov, kvn, vlivanov
Contributed-by: Ivan Krylov <ivan@azul.com>, Yuri Gaevsky <ygaevsky@azul.com>

*** 677,686 ****
--- 677,690 ----
  
      case lir_get_thread:
        get_thread(op->result_opr());
        break;
  
+     case lir_on_spin_wait:
+       on_spin_wait();
+       break;
+ 
      default:
        ShouldNotReachHere();
        break;
    }
  }