e1 = make_edge (new_head, first_head, ir_type () ? EDGE_TRUE_VALUE : 0);
set_immediate_dominator (CDI_DOMINATORS, first_head, new_head);
set_immediate_dominator (CDI_DOMINATORS, second_head, new_head);
e1 = make_edge (new_head, first_head, ir_type () ? EDGE_TRUE_VALUE : 0);
set_immediate_dominator (CDI_DOMINATORS, first_head, new_head);
set_immediate_dominator (CDI_DOMINATORS, second_head, new_head);