diff -r 121e5708ae96 -r 8b0a4867acf0 src/cpu/x86/vm/c1_LIRGenerator_x86.cpp
--- a/src/cpu/x86/vm/c1_LIRGenerator_x86.cpp	Tue Jun 12 09:47:23 2012 -0700
+++ b/src/cpu/x86/vm/c1_LIRGenerator_x86.cpp	Tue Jun 12 14:31:44 2012 -0700
@@ -718,35 +718,6 @@
 }
 
 
-void LIRGenerator::do_AttemptUpdate(Intrinsic* x) {
-  assert(x->number_of_arguments() == 3, "wrong type");
-  LIRItem obj       (x->argument_at(0), this);  // AtomicLong object
-  LIRItem cmp_value (x->argument_at(1), this);  // value to compare with field
-  LIRItem new_value (x->argument_at(2), this);  // replace field with new_value if it matches cmp_value
-
-  // compare value must be in rdx,eax (hi,lo); may be destroyed by cmpxchg8 instruction
-  cmp_value.load_item_force(FrameMap::long0_opr);
-
-  // new value must be in rcx,ebx (hi,lo)
-  new_value.load_item_force(FrameMap::long1_opr);
-
-  // object pointer register is overwritten with field address
-  obj.load_item();
-
-  // generate compare-and-swap; produces zero condition if swap occurs
-  int value_offset = sun_misc_AtomicLongCSImpl::value_offset();
-  LIR_Opr addr = new_pointer_register();
-  __ leal(LIR_OprFact::address(new LIR_Address(obj.result(), value_offset, T_LONG)), addr);
-  LIR_Opr t1 = LIR_OprFact::illegalOpr;  // no temp needed
-  LIR_Opr t2 = LIR_OprFact::illegalOpr;  // no temp needed
-  __ cas_long(addr, cmp_value.result(), new_value.result(), t1, t2);
-
-  // generate conditional move of boolean result
-  LIR_Opr result = rlock_result(x);
-  __ cmove(lir_cond_equal, LIR_OprFact::intConst(1), LIR_OprFact::intConst(0), result, T_LONG);
-}
-
-
 void LIRGenerator::do_CompareAndSwap(Intrinsic* x, ValueType* type) {
   assert(x->number_of_arguments() == 4, "wrong type");
   LIRItem obj   (x->argument_at(0), this);  // object