* We assume the start block of a procedure is executed once. Based on this we
* compute the execution freqency of all blocks.
*
- *
+ * The computation of the freqencies depends on the count of exception control
+ * flow computed during the interval analysis. The interval analysis again
+ * depends on stuff computed here.
*/
#include "irnode.h"
#include "irgraph.h"
+/* A proj from a Cond that goes to an exception handler. */
+int is_fragile_Proj(ir_node *n);
/** Returns the number of times the block/region is executed according to
- * our estimate. */
-double get_irn_exec_freq(ir_node *n);
+ * our estimate. Gives a number relative to the Start node of the procedure
+ * the block is in, which is weighted with 1. */
+double get_irn_exec_freq (ir_node *n);
double get_Block_exec_freq (ir_node *b);
double get_region_exec_freq(void *reg);
/** Compute the execution frequency for all blocks in the given
* graph.
*
- * @param irg The graph to be analyzed.
- * @param default_loop_weight The default number of executions of a loop.
+ * @param irg The graph to be analyzed.
+ * @param default_loop_weight The default number of executions of a loop.
+ * @param exception_probability The probability that a fragile operation causes an exception.
+ *
+ * Uses link field.
*/
void compute_execution_frequency(ir_graph *irg, int default_loop_weight, double exception_probability);
+
+/** Compute the execution frequency for all graphs.
+ *
+ * @param default_loop_weight The default number of executions of a loop.
+ * @param exception_probability The probability that a fragile operation causes an exception.
+ *
+ */
void compute_execution_frequencies(int default_loop_weight, double exception_probability);
-/** Free occupied memory, reset. */
+/** Free occupied memory, reset for all graphs. */
void free_execution_frequency(void);
+/** State of execution freqencies for graphs and the whole program.
+ *
+ * The exec_freq_state in irp is consistent, if the state of all graphs is consistent.
+ * It is none, if the state of all graphs is none. Else it is inconsistent. */
+typedef enum {
+ exec_freq_none, /**< Execution frequencies are not computed, no memory is
+ allocated, access fails. */
+ exec_freq_consistent, /**< Execution frequency information is computed and correct. */
+ exec_freq_inconsistent /**< Execution frequency is computed but the graph has been
+ changed since. */
+} exec_freq_state;
+
+exec_freq_state get_irg_exec_freq_state(ir_graph *irg);
+void set_irg_exec_freq_state(ir_graph *irg, exec_freq_state s);
+/* Sets irg and irp exec freq state to inconsistent if it is set to consistent. */
+void set_irg_exec_freq_state_inconsistent(ir_graph *irg);
+
+exec_freq_state get_irp_exec_freq_state(void);
+/* Sets irp and all irg exec freq states to inconsistent if it is set to consistent. */
+void set_irp_exec_freq_state_inconsistent(void);
+
+
+
#endif /* _EXECUTION_FREQUENCY_H_ */