[Ada] Fix incorrect SLOC on instruction

[Eric Botcazou]

This puts the missing SLOC on a statement generated by a return.

Tested on x86-64/Linux, applied on the mainline, 11 and 10 branches.


2021-05-21  Eric Botcazou  <ebotca...@adacore.com>

        * gcc-interface/trans.c (gnat_to_gnu) <N_Simple_Return_Statement>:
        Put a SLOC on the assignment from the return value to the return
        object in the copy-in/copy-out case.

-- 
Eric Botcazou
diff --git a/gcc/ada/gcc-interface/trans.c b/gcc/ada/gcc-interface/trans.c
index 9aeaf038118..f5686475698 100644
--- a/gcc/ada/gcc-interface/trans.c
+++ b/gcc/ada/gcc-interface/trans.c
@@ -7624,8 +7624,10 @@ gnat_to_gnu (Node_Id gnat_node)
 	if (gnu_return_label_stack->last ())
 	  {
 	    if (gnu_ret_val)
-	      add_stmt (build_binary_op (MODIFY_EXPR, NULL_TREE, gnu_ret_obj,
-					 gnu_ret_val));
+	      add_stmt_with_node (build_binary_op (MODIFY_EXPR,
+						   NULL_TREE, gnu_ret_obj,
+						   gnu_ret_val),
+				  gnat_node);
 
 	    gnu_result = build1 (GOTO_EXPR, void_type_node,
 				 gnu_return_label_stack->last ());