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[libfirm] / ir / be / bephiopt.c
1 /**
2  * @author Daniel Grund
3  * @date 04.01.2005
4  */
5
6 #include <stdlib.h>
7 #include <stdio.h>
8
9 #include "pset.h"
10 #include "irgraph.h"
11 #include "irnode.h"
12 #include "irgwalk.h"
13 #include "irdom.h"
14
15 #include "bephiopt.h"
16 #include "bephicongr_t.h"
17 #include "bephicoal_t.h"
18 #include "phistat.h"
19
20 #define DEBUG_LVL SET_LEVEL_1
21
22 #define DO_PHI_STATISTICS
23 #undef DUMP_IRG_PHI_STAT
24
25 #define DUMP_CUMULATIVE
26 #define CUMULATIVE_FILE "all.phistat"
27
28 #define ENV_PHI_STAT "PHI_STAT"
29
30 static firm_dbg_module_t *dbgphi = NULL;
31
32 static void phi_node_walker(ir_node *node, void *env) {
33         if (is_Phi(node) && mode_is_datab(get_irn_mode(node)))
34                 pset_insert_ptr((pset *)env, node);
35 }
36
37
38 void be_phi_opt(ir_graph* irg) {
39         pset *all_phi_nodes, *all_phi_classes;
40
41         DBG((dbgphi, 1, "\n\n=======================> IRG: %s\n\n", get_entity_name(get_irg_entity(irg))));
42
43
44         /* get all phi nodes */
45         DBG((dbgphi, 1, "-----------------------> Collecting phi nodes <-----------------------\n\n"));
46         all_phi_nodes = pset_new_ptr(64);
47         irg_walk_graph(irg, phi_node_walker, NULL, all_phi_nodes);
48
49
50         /* get all phi congruence classes */
51         DBG((dbgphi, 1, "-----------------------> Collecting phi classes <---------------------\n\n"));
52         all_phi_classes = be_phi_congr_classes(all_phi_nodes);
53
54
55         /* do some statistics */
56 #ifdef DO_PHI_STATISTICS
57         DBG((dbgphi, 1, "-----------------------> Collecting phi stats <-----------------------\n\n"));
58         phi_stat_reset();
59         phi_stat_collect(irg, all_phi_nodes, all_phi_classes);
60 #ifdef DUMP_IRG_PHI_STAT
61         {
62                 char buf[1024];
63                 snprintf(buf, sizeof(buf), "%s.phistat", get_entity_name(get_irg_entity(irg)));
64                 //phi_stat_dump(buf);
65                 phi_stat_dump_pretty(buf);
66         }
67 #endif
68 #ifdef DUMP_CUMULATIVE
69         phi_stat_update(CUMULATIVE_FILE);
70 #endif
71         phi_stat_update(getenv(ENV_PHI_STAT));
72 #endif
73
74
75         /* try to coalesce the colors of each phi class */
76         DBG((dbgphi, 1, "-----------------------> Coalescing <---------------------------------\n\n"));
77         compute_doms(irg);
78         be_phi_coalesce(all_phi_classes);
79         free_dom_and_peace(irg);
80 }
81
82
83 void be_phi_opt_init(void) {
84         dbgphi = firm_dbg_register("Phi optimizer");
85         firm_dbg_set_mask(dbgphi, DEBUG_LVL);
86
87         be_phi_congr_class_init();
88         be_phi_coal_init();
89 }