choosing a different flag for parm_used_in_post_p

Author: NinaRanns

gcc/cp/cp-tree.h

@@ -565,6 +565,7 @@ extern GTY(()) tree cp_global_trees[CPTI_MAX];
       DECL_SELF_REFERENCE_P (in a TYPE_DECL)
       DECL_INVALID_OVERRIDER_P (in a FUNCTION_DECL)
       DECL_UNINSTANIATED_TEMPLATE_FRIEND_P (in TEMPLATE_DECL)
+      parm_used_in_post_p (in PARM_DECL)
    5: DECL_INTERFACE_KNOWN.
    6: DECL_THIS_STATIC (in VAR_DECL, FUNCTION_DECL or PARM_DECL)
       DECL_FIELD_IS_BASE (in FIELD_DECL)
@@ -9031,7 +9032,7 @@ inline void
 set_parm_used_in_post (tree decl, bool constify = true)
 {
   gcc_checking_assert (TREE_CODE (decl) == PARM_DECL);
-  decl->base.public_flag = constify;
+  DECL_LANG_FLAG_4 (decl) = constify;
 }
 
 /* Test if PARM_DECL is ODR used in a postcondition.  */
@@ -9040,7 +9041,7 @@ inline bool
 parm_used_in_post_p (const_tree decl)
 {
   /* Check if this parameter is odr used within a function's postcondition  */
-  return ((TREE_CODE (decl) == PARM_DECL) && decl->base.public_flag);
+  return ((TREE_CODE (decl) == PARM_DECL) && DECL_LANG_FLAG_4 (decl));
 }
 
 /* Inline bodies.  */

gcc/tree-core.h

@@ -1339,9 +1339,6 @@ struct GTY(()) tree_base {
        EXPR_LOCATION_WRAPPER_P in
 	   NON_LVALUE_EXPR, VIEW_CONVERT_EXPR
 
-       parm_used_in_postcondition_p in
-	   PARM_DECL
-
 
    private_flag: