reconstruct looptree for belady spiller when needed

diff --git a/ir/be/bespillbelady.c b/ir/be/bespillbelady.c
index 547de9c..7f6248b 100644 (file)
--- a/ir/be/bespillbelady.c
+++ b/ir/be/bespillbelady.c
@@ -700,6 +700,10 @@ void be_spill_belady_spill_env(be_irg_t *birg, const arch_register_class_t *cls,
        //firm_dbg_set_mask(dbg, DBG_SPILL);
 
        be_assure_liveness(birg);
+       /* construct control flow loop tree */
+       if(! (get_irg_loopinfo_state(irg) & loopinfo_cf_consistent)) {
+               construct_cf_backedges(irg);
+       }
 
        /* init belady env */
        obstack_init(&env.ob);