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 * File name: ir/ir/firmstat.c
23 * Purpose: Statistics for Firm.
24 * Author: Michael Beck
27 * Copyright: (c) 2004 Universität Karlsruhe
33 #include "firmstat_t.h"
37 * calculated the dual logarithm of |value|
39 static unsigned log2abs(long value) {
69 * classify the value of a float tarval
71 static float_classify_t classify_float_value(tarval *tv)
73 ir_mode *mode = get_tarval_mode(tv);
75 if (tv == get_mode_null(mode))
77 else if (tv == get_mode_one(mode))
83 /* return a human readable name for an float classification */
84 const char *stat_fc_name(float_classify_t classification)
86 switch (classification) {
87 case STAT_FC_0: return "0.0";
88 case STAT_FC_1: return "1.0";
89 case STAT_FC_2: return "2.0";
90 case STAT_FC_0_5: return "0.5";
91 case STAT_FC_EXACT: return "exact";
92 case STAT_FC_OTHER: return "other";
93 default: return "<UNKNOWN>";
97 /* update info on Consts */
98 void stat_update_const(stat_info_t *status, ir_node *node, graph_entry_t *graph)
100 ir_mode *mode = get_irn_mode(node);
104 if (mode_is_int(mode)) {
105 tv = get_Const_tarval(node);
108 if (! tarval_is_long(tv))
111 bits = log2abs(get_tarval_long(tv));
113 if (bits > ARR_SIZE(status->const_info.int_bits_count))
114 bits = ARR_SIZE(status->const_info.int_bits_count);
116 cnt_inc(&status->const_info.int_bits_count[bits]);
118 else if (mode_is_float(mode)) {
119 tv = get_Const_tarval(node);
121 cnt_inc(&status->const_info.floats[classify_float_value(tv)]);
124 /* something different */
125 cnt_inc(&status->const_info.others);
129 /* clears the const statistics for a new snapshot */
130 void stat_const_clear(stat_info_t *status)
134 for (i = 0; i < ARR_SIZE(status->const_info.int_bits_count); ++i)
135 cnt_clr(&status->const_info.int_bits_count[i]);
137 for (i = 0; i < ARR_SIZE(status->const_info.floats); ++i)
138 cnt_clr(&status->const_info.floats[i]);
140 cnt_clr(&status->const_info.others);
143 /* initialize the Const statistic. */
144 void stat_init_const_cnt(stat_info_t *status)