src/jdk.compiler/share/classes/com/sun/tools/javac/code/Attribute.java

*** 61,70 ****
--- 61,87 ----
      @DefinedBy(Api.LANGUAGE_MODEL)
      public <R, P> R accept(AnnotationValueVisitor<R, P> v, P p) {
          throw new UnsupportedOperationException();
      }
  
+     @Override
+     @DefinedBy(Api.LANGUAGE_MODEL)
+     public boolean equals(Object o) {
+         if (o instanceof AnnotationValue) {
+             AnnotationValue that = (AnnotationValue) o;
+             return getValue().equals(that.getValue());
+         } else {
+             return false;
+         }
+     }
+ 
+     @Override
+     @DefinedBy(Api.LANGUAGE_MODEL)
+     public int hashCode() {
+         return getValue().hashCode();
+     }
+ 
      public boolean isSynthesized() {
          return false;
      }
  
      public TypeAnnotationPosition getPosition() { return null; }
*** 260,269 ****
--- 277,306 ----
                  buf.append(')');
              }
              return buf.toString();
          }
  
+         @Override
+         @DefinedBy(Api.LANGUAGE_MODEL)
+         public boolean equals(Object o) {
+             if (o instanceof AnnotationMirror) {
+                 AnnotationMirror that = (AnnotationMirror) o;
+                 return
+                     getAnnotationType().equals(that.getAnnotationType()) &&
+                     getElementValues().equals(that.getElementValues());
+             } else {
+                 return false;
+             }
+         }
+ 
+         @Override
+         @DefinedBy(Api.LANGUAGE_MODEL)
+         public int hashCode() {
+              return getAnnotationType().hashCode() ^
+                  getElementValues().hashCode();
+         }
+ 
          public Attribute member(Name member) {
              Pair<MethodSymbol,Attribute> res = getElemPair(member);
              return res == null ? null : res.snd;
          }