becopyheur: Avoid unnecessary bitset copying.

[libfirm] / ir / be / becopyheur.c

diff --git a/ir/be/becopyheur.c b/ir/be/becopyheur.c
index f104938..be20305 100644 (file)
--- a/ir/be/becopyheur.c
+++ b/ir/be/becopyheur.c
@@ -262,11 +262,8 @@ static ir_node *qnode_color_irn(qnode_t const *const qn, ir_node *const irn, int
                bitset_copy(free_cols, allocatable_regs);
 
                /* Exclude colors not assignable to the irn */
-               if (arch_register_req_is(req, limited)) {
-                       bitset_t *limited = bitset_alloca(cls->n_regs);
-                       rbitset_copy_to_bitset(req->limited, limited);
-                       bitset_and(free_cols, limited);
-               }
+               if (arch_register_req_is(req, limited))
+                       rbitset_and(free_cols->data, req->limited, free_cols->size);
 
                /* Exclude the color of the irn, because it must _change_ its color */
                bitset_clear(free_cols, irn_col);