cp: add support for per-location warning groups.

gcc/cp/ChangeLog:

	* call.c (build_over_call): Replace direct uses of TREE_NO_WARNING
	with warning_suppressed_p, suppress_warning, and copy_no_warning, or
	nothing if not necessary.
	(set_up_extended_ref_temp): Same.
	* class.c (layout_class_type): Same.
	* constraint.cc (constraint_satisfaction_value): Same.
	* coroutines.cc (finish_co_await_expr): Same.
	(finish_co_yield_expr): Same.
	(finish_co_return_stmt): Same.
	(build_actor_fn): Same.
	(coro_rewrite_function_body): Same.
	(morph_fn_to_coro): Same.
	* cp-gimplify.c (genericize_eh_spec_block): Same.
	(gimplify_expr_stmt): Same.
	(cp_genericize_r): Same.
	(cp_fold): Same.
	* cp-ubsan.c (cp_ubsan_instrument_vptr): Same.
	* cvt.c (cp_fold_convert): Same.
	(convert_to_void): Same.
	* decl.c (wrapup_namespace_globals): Same.
	(grokdeclarator): Same.
	(finish_function): Same.
	(require_deduced_type): Same.
	* decl2.c (no_linkage_error): Same.
	(c_parse_final_cleanups): Same.
	* except.c (expand_end_catch_block): Same.
	* init.c (build_new_1): Same.
	(build_new): Same.
	(build_vec_delete_1): Same.
	(build_vec_init): Same.
	(build_delete): Same.
	* method.c (defaultable_fn_check): Same.
	* parser.c (cp_parser_fold_expression): Same.
	(cp_parser_primary_expression): Same.
	* pt.c (push_tinst_level_loc): Same.
	(tsubst_copy): Same.
	(tsubst_omp_udr): Same.
	(tsubst_copy_and_build): Same.
	* rtti.c (build_if_nonnull): Same.
	* semantics.c (maybe_convert_cond): Same.
	(finish_return_stmt): Same.
	(finish_parenthesized_expr): Same.
	(cp_check_omp_declare_reduction): Same.
	* tree.c (build_cplus_array_type): Same.
	* typeck.c (build_ptrmemfunc_access_expr): Same.
	(cp_build_indirect_ref_1): Same.
	(cp_build_function_call_vec): Same.
	(warn_for_null_address): Same.
	(cp_build_binary_op): Same.
	(unary_complex_lvalue): Same.
	(cp_build_modify_expr): Same.
	(build_x_modify_expr): Same.
	(convert_for_assignment): Same.

1 files changed, 6 insertions, 9 deletions

diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c
index 66bcc4b..fa6af6f 100644
--- a/gcc/cp/decl.c
+++ b/gcc/cp/decl.c
@@ -850,7 +850,7 @@ wrapup_namespace_globals ()
 	      && !TREE_PUBLIC (decl)
 	      && !DECL_ARTIFICIAL (decl)
 	      && !DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl)
-	      && !TREE_NO_WARNING (decl))
+	      && !warning_suppressed_p (decl, OPT_Wunused_function))
 	    warning_at (DECL_SOURCE_LOCATION (decl),
 			OPT_Wunused_function,
 			"%qF declared %<static%> but never defined", decl);
@@ -13906,10 +13906,7 @@ grokdeclarator (const cp_declarator *declarator,
 		decl = build_decl (id_loc, FIELD_DECL, unqualified_id, type);
 		DECL_NONADDRESSABLE_P (decl) = bitfield;
 		if (bitfield && !unqualified_id)
-		  {
-		    TREE_NO_WARNING (decl) = 1;
-		    DECL_PADDING_P (decl) = 1;
-		  }
+		  DECL_PADDING_P (decl) = 1;
 
 		if (storage_class == sc_mutable)
 		  {
@@ -17495,7 +17492,7 @@ finish_function (bool inline_p)
       /* Don't complain if we are declared noreturn.  */
       && !TREE_THIS_VOLATILE (fndecl)
       && !DECL_NAME (DECL_RESULT (fndecl))
-      && !TREE_NO_WARNING (fndecl)
+      && !warning_suppressed_p (fndecl, OPT_Wreturn_type)
       /* Structor return values (if any) are set by the compiler.  */
       && !DECL_CONSTRUCTOR_P (fndecl)
       && !DECL_DESTRUCTOR_P (fndecl)
@@ -17523,7 +17520,7 @@ finish_function (bool inline_p)
       else if (warning_at (&richloc, OPT_Wreturn_type,
 			   "no return statement in function returning "
 			   "non-void"))
-	TREE_NO_WARNING (fndecl) = 1;
+	suppress_warning (fndecl, OPT_Wreturn_type);
     }
 
   /* Lambda closure members are implicitly constexpr if possible.  */
@@ -17597,7 +17594,7 @@ finish_function (bool inline_p)
 	    && !DECL_READ_P (decl)
 	    && DECL_NAME (decl)
 	    && !DECL_ARTIFICIAL (decl)
-	    && !TREE_NO_WARNING (decl)
+	    && !warning_suppressed_p (decl,OPT_Wunused_but_set_parameter)
 	    && !DECL_IN_SYSTEM_HEADER (decl)
 	    && TREE_TYPE (decl) != error_mark_node
 	    && !TYPE_REF_P (TREE_TYPE (decl))
@@ -18088,7 +18085,7 @@ require_deduced_type (tree decl, tsubst_flags_t complain)
 {
   if (undeduced_auto_decl (decl))
     {
-      if (TREE_NO_WARNING (decl) && seen_error ())
+      if (warning_suppressed_p (decl) && seen_error ())
 	/* We probably already complained about deduction failure.  */;
       else if (complain & tf_error)
 	error ("use of %qD before deduction of %<auto%>", decl);