src/share/vm/c1/c1_LIRGenerator.cpp

*** 2408,2417 ****
--- 2408,2426 ----
      }
    }
  #endif // INCLUDE_ALL_GCS
  
    if (x->is_volatile() && os::is_MP()) __ membar_acquire();
+ 
+   /* Normalize boolean value returned by unsafe operation, i.e., value  != 0 ? value = true : value false. */
+   if (type == T_BOOLEAN) {
+     LabelObj* equalZeroLabel = new LabelObj();
+     __ cmp(lir_cond_equal, value, 0);
+     __ branch(lir_cond_equal, T_BOOLEAN, equalZeroLabel->label());
+     __ move(LIR_OprFact::intConst(1), value);
+     __ branch_destination(equalZeroLabel->label());
+   }
  }
  
  
  void LIRGenerator::do_UnsafePutObject(UnsafePutObject* x) {
    BasicType type = x->basic_type();