[PATCH 2/13] v2 Use new per-location warning APIs in Ada.

[Martin Sebor via Gcc-patches]

The attached patch replaces the uses of TREE_NO_WARNING in the Ada front
end with the new suppress_warning(), warning_suppressed_p(), and
copy_warning() APIs.

Add support for per-location warning groups.

gcc/ada/ChangeLog:

	* gcc-interface/trans.c (Handled_Sequence_Of_Statements_to_gnu):
	Replace TREE_NO_WARNING with suppress_warning.
	(gnat_gimplify_expr): Same.
	* gcc-interface/utils.c (gnat_pushdecl): Same.

diff --git a/gcc/ada/gcc-interface/trans.c b/gcc/ada/gcc-interface/trans.c
index ee014a35cc2..949b7733766 100644
--- a/gcc/ada/gcc-interface/trans.c
+++ b/gcc/ada/gcc-interface/trans.c
@@ -5363,7 +5363,7 @@ Handled_Sequence_Of_Statements_to_gnu (Node_Id gnat_node)
 	 because of the unstructured form of EH used by fe_sjlj_eh, there
 	 might be forward edges going to __builtin_setjmp receivers on which
 	 it is uninitialized, although they will never be actually taken.  */
-      TREE_NO_WARNING (gnu_jmpsave_decl) = 1;
+      suppress_warning (gnu_jmpsave_decl, OPT_Wuninitialized);
       gnu_jmpbuf_decl
 	= create_var_decl (get_identifier ("JMP_BUF"), NULL_TREE,
 			   jmpbuf_type,
@@ -8805,7 +8805,7 @@ gnat_gimplify_expr (tree *expr_p, gimple_seq *pre_p,
       else
 	{
 	  *expr_p = create_tmp_var (type, NULL);
-	  TREE_NO_WARNING (*expr_p) = 1;
+	  suppress_warning (*expr_p);
 	}
 
       gimplify_and_add (TREE_OPERAND (expr, 0), pre_p);
diff --git a/gcc/ada/gcc-interface/utils.c b/gcc/ada/gcc-interface/utils.c
index 1786fbf8186..982274c6d77 100644
--- a/gcc/ada/gcc-interface/utils.c
+++ b/gcc/ada/gcc-interface/utils.c
@@ -836,7 +836,8 @@ gnat_pushdecl (tree decl, Node_Id gnat_node)
   if (!deferred_decl_context)
     DECL_CONTEXT (decl) = context;
 
-  TREE_NO_WARNING (decl) = (No (gnat_node) || Warnings_Off (gnat_node));
+  suppress_warning (decl, all_warnings,
+		    No (gnat_node) || Warnings_Off (gnat_node));
 
   /* Set the location of DECL and emit a declaration for it.  */
   if (Present (gnat_node) && !renaming_from_instantiation_p (gnat_node))