1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/expr.h b/gcc/expr.h
index 9ed572c..596b68a 100644
--- a/gcc/expr.h
+++ b/gcc/expr.h
@@ -1257,6 +1257,17 @@ extern rtx (*lang_expand_expr) PARAMS ((union tree_node *, rtx,
    such codes that output_constant needs to know about.  Returns a
    language-independent constant equivalent to its input.  */
 extern tree (*lang_expand_constant) PARAMS ((tree));
+
+extern int safe_from_p PARAMS ((rtx, tree, int));
+
+/* Hook called by safe_from_p for language-specific tree codes.  It is
+   up to the language front-end to install a hook if it has any such
+   codes that safe_from_p needs to know about.  Since same_from_p will
+   recursively explore the TREE_OPERANDs of an expression, this hook
+   should not reexamine those pieces.  This routine may recursively
+   call safe_from_p; it should always pass `0' as the TOP_P
+   parameter.  */
+extern int (*lang_safe_from_p) PARAMS ((rtx, tree));
 #endif
 
 extern void init_all_optabs			PARAMS ((void));