ptr add/sub test

[libfirm] / ir / opt / tailrec.c

diff --git a/ir/opt/tailrec.c b/ir/opt/tailrec.c
index 11e9088..55ea68a 100644 (file)
--- a/ir/opt/tailrec.c
+++ b/ir/opt/tailrec.c
@@ -489,7 +489,7 @@ static tail_rec_variants find_variant(ir_node *irn, ir_node *call) {
                return TR_BAD;
 
        case iro_Sub:
-               /* try additive, but return value mut be left */
+               /* try additive, but return value must be left */
                a = get_Sub_left(irn);
                if (get_irn_MacroBlock(a) != get_irn_MacroBlock(call)) {
                        /* we are outside, ignore */
@@ -719,8 +719,10 @@ void opt_tail_recursion(void) {
 
                current_ir_graph = irg;
 
+               set_using_irn_link(irg);
                if (opt_tail_rec_irg(irg))
                        ++n_opt_applications;
+               clear_using_irn_link(irg);
        }
 
        DB((dbg, LEVEL_1, "Performed tail recursion for %d of %d graphs\n",