PR c++/58407 - deprecated implicit copy ops.

gcc/c-family/
	* c.opt (Wdeprecated-copy): New flag.
gcc/cp/
	* call.c (build_over_call): Warn about deprecated trivial fns.
	* class.c (classtype_has_user_copy_or_dtor): New.
	(type_build_ctor_call): Check TREE_DEPRECATED.
	(type_build_dtor_call): Likewise.
	* decl2.c (cp_warn_deprecated_use): Move from tree.c.
	Add checks.  Return bool.  Handle -Wdeprecated-copy.
	(mark_used): Use it.
	* decl.c (grokdeclarator): Remove redundant checks.
	* typeck2.c (build_functional_cast): Likewise.
	* method.c (lazily_declare_fn): Mark deprecated copy ops.
	* init.c (build_aggr_init): Only set TREE_USED if there are
	side-effects.
libitm/
	* beginend.cc (save): Disable -Werror=deprecated-copy.

From-SVN: r260381

1 files changed, 36 insertions, 0 deletions

diff --git a/gcc/cp/class.c b/gcc/cp/class.c
index 306ee29..4960b4b 100644
--- a/gcc/cp/class.c
+++ b/gcc/cp/class.c
@@ -5171,6 +5171,40 @@ classtype_has_move_assign_or_move_ctor_p (tree t, bool user_p)
   return false;
 }
 
+/* If T, a class, has a user-provided copy constructor, copy assignment
+   operator, or destructor, returns that function.  Otherwise, null.  */
+
+tree
+classtype_has_user_copy_or_dtor (tree t)
+{
+  if (!CLASSTYPE_LAZY_COPY_CTOR (t))
+    for (ovl_iterator iter (CLASSTYPE_CONSTRUCTORS (t)); iter; ++iter)
+      {
+	tree fn = *iter;
+	if (user_provided_p (fn) && copy_fn_p (fn))
+	  return fn;
+      }
+
+  if (!CLASSTYPE_LAZY_COPY_ASSIGN (t))
+    for (ovl_iterator iter (get_class_binding_direct
+			    (t, assign_op_identifier));
+	 iter; ++iter)
+      {
+	tree fn = *iter;
+	if (user_provided_p (fn) && copy_fn_p (fn))
+	  return fn;
+      }
+
+  if (!CLASSTYPE_LAZY_DESTRUCTOR (t))
+    {
+      tree fn = CLASSTYPE_DESTRUCTOR (t);
+      if (user_provided_p (fn))
+	return fn;
+    }
+
+  return NULL_TREE;
+}
+
 /* Nonzero if we need to build up a constructor call when initializing an
    object of this class, either because it has a user-declared constructor
    or because it doesn't have a default constructor (so we need to give an
@@ -5201,6 +5235,7 @@ type_build_ctor_call (tree t)
     {
       tree fn = *iter;
       if (!DECL_ARTIFICIAL (fn)
+	  || TREE_DEPRECATED (fn)
 	  || DECL_DELETED_FN (fn))
 	return true;
     }
@@ -5228,6 +5263,7 @@ type_build_dtor_call (tree t)
     {
       tree fn = *iter;
       if (!DECL_ARTIFICIAL (fn)
+	  || TREE_DEPRECATED (fn)
 	  || DECL_DELETED_FN (fn))
 	return true;
     }