set deleted attributes to NULL

[r17963]

diff --git a/ir/be/beabi.c b/ir/be/beabi.c
index d6c0bbd..22f408d 100644 (file)
--- a/ir/be/beabi.c
+++ b/ir/be/beabi.c
@@ -2055,9 +2055,11 @@ be_abi_irg_t *be_abi_introduce(be_irg_t *birg)
 
        /* We don't need the keep map anymore. */
        pmap_destroy(env->keep_map);
+       env->keep_map = NULL;
 
        /* calls array is not needed anymore */
        DEL_ARR_F(env->calls);
+       env->calls = NULL;
 
        /* reroute the stack origin of the calls to the true stack origin. */
        exchange(dummy, env->init_sp);