- * There are 2 possibilities to spill a phi node: Only it's value, or replacing
- * the whole phi-node with a memory phi. Normally only the value of a phi will
- * be spilled unless you mark the phi with be_spill_phi.
- * (Remember that each phi needs a register, so you have to spill phis when
- * there are more phis than registers in a block)
- */
-void be_spill_phi(spill_env_t *env, ir_node *node);
-
-/**
- * Returns the estimated costs if a node would ge spilled. This does only return
- * the costs for the spill instructions, not the costs for needed reload
- * instructions. The value is weighted by the estimated execution frequency of
- * the spill.
- */
-double be_get_spill_costs(spill_env_t *env, ir_node *to_spill, ir_node *before);
-
-/**
- * Returns the estimated costs if a node would get reloaded at a specific place
- * This returns the costs for a reload instructions, or when possible the costs
- * for a rematerialisation. The value is weighted by the estimated execution
- * frequency of the reload/rematerialisation.
- */
-double be_get_reload_costs(spill_env_t *env, ir_node *to_spill,
- ir_node *before);
-
-unsigned be_get_reload_costs_no_weight(spill_env_t *env, const ir_node *to_spill,
- const ir_node *before);
-
-
-/**
- * Analog to be_get_reload_costs but returns the cost if the reload would be
- * placed "on an edge" between 2 blocks
- */
-double be_get_reload_costs_on_edge(spill_env_t *env, ir_node *to_spill,
- ir_node *block, int pos);
-
-typedef struct {
- unsigned n_spills;
- unsigned n_reloads;
- double spill_costs;
- double reload_costs;
-} be_total_spill_costs_t;
-
-/**
- * Insert a spill after the definition of the given node if there is a reload that is not dominated by some spill.
- * This function checks whether there is a reload that is not dominated by some spill for that node.
- * If so, it inserts a spill right after the definition of the node.
- * @param env The spill environment.
- * @param irn The node to check for.
- */
-void make_spill_locations_dominate_irn(spill_env_t *env, ir_node *irn);
-
-/**
- * Collect spill/reload cost statistics for a graph.
- * @param birg The backend graph.
- * @param costs A struct which will be filled with the costs.