2 * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved.
4 * This file is part of libFirm.
6 * This file may be distributed and/or modified under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation and appearing in the file LICENSE.GPL included in the
9 * packaging of this file.
11 * Licensees holding valid libFirm Professional Edition licenses may use
12 * this file in accordance with the libFirm Commercial License.
13 * Agreement provided with the Software.
15 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
16 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * @author Sebastian Hack
27 * Live in/end checks whose only precomputation concerns the structure of the CFG.
28 * Hence, nothing has to be updated if the program is modified unless the CFG is touched.
29 * See .c file for more comments.
31 #ifndef FIRM_ANA_IRLIVECHK_H
32 #define FIRM_ANA_IRLIVECHK_H
41 lv_chk_state_through = lv_chk_state_in | lv_chk_state_out | lv_chk_state_end,
44 #define LV_CHK_MAX_BINS 32
46 int dist_uses_per_var[LV_CHK_MAX_BINS]; /** distribution of uses per variable. */
47 int dist_iterations[LV_CHK_MAX_BINS]; /** distribution of loop iterations. */
48 int n_calls; /** number of total calls to the chk routine. */
49 int n_no_dominance; /** exists due to no existing dominance rel. */
50 int n_false; /** number of times the check returned false. */
51 int n_def_block; /** number of times the queried block was also
52 the definition block of the variable. */
55 typedef struct _lv_chk_t lv_chk_t;
58 * Make a new liveness check environment.
59 * @param irg The graph.
60 * @return The environment.
62 extern lv_chk_t *lv_chk_new(ir_graph *irg);
65 * Get statistic data for the liveness check.
66 * @param lv The liveness check.
67 * @return A record with statistics data or NULL if stats were
70 extern const lv_chk_stat_t *lv_chk_get_stat(const lv_chk_t *lv);
73 * Free liveness check information.
74 * @param lv The liveness check information.
76 extern void lv_chk_free(lv_chk_t *lv);
78 #define lv_chk_bl_end(lv, bl, irn) ((lv_chk_bl_xxx((lv), (bl), (irn)) & lv_chk_state_end) != 0)
79 #define lv_chk_bl_out(lv, bl, irn) ((lv_chk_bl_xxx((lv), (bl), (irn)) & lv_chk_state_out) != 0)
80 #define lv_chk_bl_in(lv, bl, irn) ((lv_chk_bl_xxx((lv), (bl), (irn)) & lv_chk_state_in) != 0)
83 * Return liveness information for a node concerning a block.
84 * @param lv The liveness environment.
85 * @param bl The block to investigate.
86 * @param irn The node to check for.
87 * @return A bitmask of <code>lv_chk_state_t</code>.
89 extern unsigned lv_chk_bl_xxx(const lv_chk_t *lv, const ir_node *bl, const ir_node *irn);
91 #endif /* FIRM_ANA_IRLIVECHK_H */