Added method converting int to BitSet to BitSetUtils.

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/kt/JetClassAnnotation.java

@@ -21,6 +21,7 @@ import com.intellij.psi.PsiClass;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jet.lang.resolve.java.JvmStdlibNames;
+import org.jetbrains.jet.utils.BitSetUtils;
 
 import java.util.BitSet;
 
@@ -45,12 +46,7 @@ public class JetClassAnnotation extends PsiAnnotationWrapper {
     private BitSet flags = null;
     public BitSet flags() {
         if (flags == null) {
-            int flagsValue = getIntAttribute(JvmStdlibNames.JET_CLASS_FLAGS_FIELD, JvmStdlibNames.FLAGS_DEFAULT_VALUE);
+            flags = BitSetUtils.toBitSet(getIntAttribute(JvmStdlibNames.JET_CLASS_FLAGS_FIELD, JvmStdlibNames.FLAGS_DEFAULT_VALUE));
-
-            flags = new BitSet(JvmStdlibNames.FLAGS_BITS);
-            for (int bit = 0; bit < JvmStdlibNames.FLAGS_BITS; bit++) {
-                flags.set(bit, (flagsValue & (1 << bit)) != 0);
-            }
         }
         return flags;
     }

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/kt/JetMethodAnnotation.java

@@ -21,6 +21,7 @@ import com.intellij.psi.PsiMethod;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jet.lang.resolve.java.JvmStdlibNames;
+import org.jetbrains.jet.utils.BitSetUtils;
 
 import java.util.BitSet;
 
@@ -42,10 +43,7 @@ public class JetMethodAnnotation extends PsiAnnotationWrapper {
                 flagsValue = getIntAttribute(JvmStdlibNames.JET_METHOD_KIND_FIELD, JvmStdlibNames.FLAGS_DEFAULT_VALUE);
             }
 
-            flags = new BitSet(JvmStdlibNames.FLAGS_BITS);
+            flags = BitSetUtils.toBitSet(flagsValue);
-            for (int bit = 0; bit < JvmStdlibNames.FLAGS_BITS; bit++) {
-                flags.set(bit, (flagsValue & (1 << bit)) != 0);
-            }
         }
         return flags;
     }

compiler/util/src/org/jetbrains/jet/utils/BitSetUtils.java

@@ -35,4 +35,14 @@ public class BitSetUtils {
         }
         return intValue;
     }
+
+    public static BitSet toBitSet(int value) {
+        BitSet bitSet = new BitSet();
+        int bit = 0;
+        while (value > 0) {
+            bitSet.set(bit++, value % 2 == 1);
+            value >>= 1;
+        }
+        return bitSet;
+    }
 }