ia64: Adjust the C++14 vs. C++17 ABI thing for [[no_unique_address]] too [PR94706]

2020-04-29  Jakub Jelinek  <jakub@redhat.com>

	PR target/94706
	* config/ia64/ia64.c (hfa_element_mode): Use DECL_FIELD_ABI_IGNORED
	instead of cxx17_empty_base_field_p.

gcc/ChangeLog

 2020-04-29  Jakub Jelinek  <jakub@redhat.com>
 
+	PR target/94706
+	* config/ia64/ia64.c (hfa_element_mode): Use DECL_FIELD_ABI_IGNORED
+	instead of cxx17_empty_base_field_p.
+
 	PR target/94707
 	* tree-core.h (tree_decl_common): Note decl_flag_0 used for
 	DECL_FIELD_ABI_IGNORED.

gcc/config/ia64/ia64.c

@@ -4665,7 +4665,7 @@ hfa_element_mode (const_tree type, bool nested)
     case QUAL_UNION_TYPE:
       for (t = TYPE_FIELDS (type); t; t = DECL_CHAIN (t))
 	{
-	  if (TREE_CODE (t) != FIELD_DECL || cxx17_empty_base_field_p (t))
+	  if (TREE_CODE (t) != FIELD_DECL || DECL_FIELD_ABI_IGNORED (t))
 	    continue;
 
 	  mode = hfa_element_mode (TREE_TYPE (t), 1);