- res->blocks = (ir_node**) calloc (n_blocks, sizeof (ir_node*));
- res->idoms = (ir_node**) calloc (n_blocks, sizeof (ir_node*));
- res->masks = (bs_t*) calloc (n_blocks, sizeof (bs_t));
+ res->blocks = xcalloc(n_blocks, sizeof(res->blocks[0]));
+ res->idoms = xcalloc(n_blocks, sizeof(res->idoms[0]));
+ res->masks = xcalloc(n_blocks, sizeof(res->masks[0]));