src/share/vm/opto/c2compiler.cpp

rev 10065 : 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
Contributed-by: ikrylov, ygaevsky
Reviewed-by: iveresov, vlivanov, kvn

*** 301,310 ****
--- 301,313 ----
      if (!Matcher::match_rule_supported(Op_OverflowMulL)) return false;
      break;
    case vmIntrinsics::_getCallerClass:
      if (SystemDictionary::reflect_CallerSensitive_klass() == NULL) return false;
      break;
+   case vmIntrinsics::_onSpinWait:
+     if (!Matcher::match_rule_supported(Op_OnSpinWait)) return false;
+     break;
    case vmIntrinsics::_hashCode:
    case vmIntrinsics::_identityHashCode:
    case vmIntrinsics::_getClass:
    case vmIntrinsics::_dsin:
    case vmIntrinsics::_dcos: