+void be_ra_chordal_color(be_chordal_env_t *chordal_env);
+
+/**
+ * Check a register allocation obtained with the chordal register allocator.
+ * @param chordal_env The chordal environment.
+ */
+void be_ra_chordal_check(be_chordal_env_t *chordal_env);
+
+enum {
+ /* spill method */
+ BE_CH_SPILL_BELADY = 1,
+ BE_CH_SPILL_MORGAN = 2,
+ BE_CH_SPILL_REMAT = 3,
+
+ /* Dump flags */
+ BE_CH_DUMP_NONE = (1 << 0),
+ BE_CH_DUMP_SPILL = (1 << 1),
+ BE_CH_DUMP_LIVE = (1 << 2),
+ BE_CH_DUMP_COLOR = (1 << 3),
+ BE_CH_DUMP_COPYMIN = (1 << 4),
+ BE_CH_DUMP_SSADESTR = (1 << 5),
+ BE_CH_DUMP_TREE_INTV = (1 << 6),
+ BE_CH_DUMP_CONSTR = (1 << 7),
+ BE_CH_DUMP_SPILLSLOTS = (1 << 8),
+ BE_CH_DUMP_LOWER = (1 << 9),
+ BE_CH_DUMP_APPEL = (1 << 10),
+ BE_CH_DUMP_ALL = 2 * BE_CH_DUMP_APPEL - 1,
+
+ /* ifg flavor */
+ BE_CH_IFG_STD = 1,
+ BE_CH_IFG_FAST = 2,
+ BE_CH_IFG_CLIQUE = 3,
+ BE_CH_IFG_POINTER = 4,
+ BE_CH_IFG_LIST = 5,
+ BE_CH_IFG_CHECK = 6,
+
+ /* lower perm options */
+ BE_CH_LOWER_PERM_SWAP = 1,
+ BE_CH_LOWER_PERM_COPY = 2,
+
+ /* verify options */
+ BE_CH_VRFY_OFF = 1,
+ BE_CH_VRFY_WARN = 2,
+ BE_CH_VRFY_ASSERT = 3,
+};
+
+struct _be_ra_chordal_opts_t {
+ int dump_flags;
+ int spill_method;
+ int ifg_flavor;
+ int lower_perm_opt;
+ int vrfy_option;
+
+ char ilp_server[128];
+ char ilp_solver[128];
+};
+
+/**
+ * Open a file whose name is composed from the graph's name and the current register class.
+ * @note The name of the file will be prefix(ifg_name)_(reg_class_name).suffix
+ * @param prefix The file name's prefix.
+ * @param suffix The file name's ending (the . is inserted automatically).
+ * @return A text file opened for writing.
+ */
+FILE *be_chordal_open(const be_chordal_env_t *env, const char *prefix, const char *suffix);