3 * Chordal register allocation.
4 * @author Sebastian Hack
12 * Allocate registers for an ir graph.
13 * @param irg The graph.
14 * @return Some internal data to be freed with be_ra_chordal_free().
16 void be_ra_chordal(ir_graph *irg);
18 void be_ra_chordal_done(ir_graph *irg);
20 int phi_ops_interfere(const ir_node *a, const ir_node *b);