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* flow.c (flow_nodes_print, flow_loops_cfg_dump): New functions.
[pf3gnuchains/gcc-fork.git] / gcc / sbitmap.h
1 /* Simple bitmaps.
2    Copyright (C) 1999 Free Software Foundation, Inc.
3
4 This file is part of GNU CC.
5
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING.  If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA.  */
20
21 #ifndef _SBITMAP_H
22 #define _SBITMAP_H 1
23
24 /* It's not clear yet whether using bitmap.[ch] will be a win.
25    It should be straightforward to convert so for now we keep things simple
26    while more important issues are dealt with.  */
27
28 #define SBITMAP_ELT_BITS HOST_BITS_PER_WIDE_INT
29 #define SBITMAP_ELT_TYPE unsigned HOST_WIDE_INT
30
31 typedef struct simple_bitmap_def {
32   /* Number of bits.  */
33   int n_bits;
34   /* Size in elements.  */
35   int size;
36   /* Size in bytes.  */
37   int bytes;
38   /* The elements.  */
39   SBITMAP_ELT_TYPE elms[1];
40 } *sbitmap;
41
42 typedef SBITMAP_ELT_TYPE *sbitmap_ptr;
43
44 /* Return the set size needed for N elements.  */
45 #define SBITMAP_SET_SIZE(n) (((n) + SBITMAP_ELT_BITS - 1) / SBITMAP_ELT_BITS)
46
47 /* set bit number bitno in the bitmap */
48 #define SET_BIT(bitmap, bitno)                                  \
49   ((bitmap)->elms [(bitno) / SBITMAP_ELT_BITS]                  \
50    |= (SBITMAP_ELT_TYPE) 1 << (bitno) % SBITMAP_ELT_BITS)
51
52 /* test if bit number bitno in the bitmap is set */
53 #define TEST_BIT(bitmap, bitno) \
54 ((bitmap)->elms [(bitno) / SBITMAP_ELT_BITS] >> (bitno) % SBITMAP_ELT_BITS & 1)
55
56 /* reset bit number bitno in the bitmap  */
57 #define RESET_BIT(bitmap, bitno)                                \
58   ((bitmap)->elms [(bitno) / SBITMAP_ELT_BITS]                  \
59    &= ~((SBITMAP_ELT_TYPE) 1 << (bitno) % SBITMAP_ELT_BITS))
60
61 /* Loop over all elements of SBITSET, starting with MIN.  */
62 #define EXECUTE_IF_SET_IN_SBITMAP(SBITMAP, MIN, N, CODE)                \
63 do {                                                                    \
64   unsigned int bit_num_ = (MIN) % (unsigned) SBITMAP_ELT_BITS;          \
65   unsigned int word_num_ = (MIN) / (unsigned) SBITMAP_ELT_BITS;         \
66   unsigned int size_ = (SBITMAP)->size;                                 \
67   SBITMAP_ELT_TYPE *ptr_ = (SBITMAP)->elms;                             \
68                                                                         \
69   while (word_num_ < size_)                                             \
70     {                                                                   \
71       SBITMAP_ELT_TYPE word_ = ptr_[word_num_];                         \
72       if (word_ != 0)                                                   \
73         {                                                               \
74           for (; bit_num_ < SBITMAP_ELT_BITS; ++bit_num_)               \
75             {                                                           \
76               SBITMAP_ELT_TYPE mask_ = (SBITMAP_ELT_TYPE)1 << bit_num_; \
77               if ((word_ & mask_) != 0)                                 \
78                 {                                                       \
79                   word_ &= ~mask_;                                      \
80                   (N) = word_num_ * SBITMAP_ELT_BITS + bit_num_;        \
81                   CODE;                                                 \
82                   if (word_ == 0)                                       \
83                     break;                                              \
84                 }                                                       \
85             }                                                           \
86         }                                                               \
87       bit_num_ = 0;                                                     \
88       word_num_++;                                                      \
89    }                                                                    \
90 } while (0)
91
92 #define sbitmap_free(map)               free(map)
93 #define sbitmap_vector_free(vec)        free(vec)
94
95 extern void dump_sbitmap PROTO ((FILE *, sbitmap));
96 extern void dump_sbitmap_vector PROTO ((FILE *, const char *, const char *,
97                                         sbitmap *, int));
98
99 extern sbitmap sbitmap_alloc PROTO ((int));
100 extern sbitmap *sbitmap_vector_alloc PROTO ((int, int));
101
102 extern void sbitmap_copy PROTO ((sbitmap, sbitmap));
103 extern void sbitmap_zero PROTO ((sbitmap));
104 extern void sbitmap_ones PROTO ((sbitmap));
105 extern void sbitmap_vector_zero PROTO ((sbitmap *, int));
106 extern void sbitmap_vector_ones PROTO ((sbitmap *, int));
107
108 extern int sbitmap_union_of_diff PROTO ((sbitmap, sbitmap, sbitmap, sbitmap));
109 extern void sbitmap_difference PROTO ((sbitmap, sbitmap, sbitmap));
110 extern void sbitmap_not PROTO ((sbitmap, sbitmap));
111 extern int sbitmap_a_or_b_and_c PROTO ((sbitmap, sbitmap, sbitmap, sbitmap));
112 extern int sbitmap_a_and_b_or_c PROTO ((sbitmap, sbitmap, sbitmap, sbitmap));
113 extern int sbitmap_a_and_b PROTO ((sbitmap, sbitmap, sbitmap));
114 extern int sbitmap_a_or_b PROTO ((sbitmap, sbitmap, sbitmap));
115 extern int sbitmap_a_subset_b_p PROTO ((sbitmap, sbitmap));
116
117 struct int_list;
118 extern void sbitmap_intersect_of_predsucc PROTO ((sbitmap, sbitmap *,
119                                                   int, struct int_list **));
120 #define sbitmap_intersect_of_predecessors  sbitmap_intersect_of_predsucc
121 #define sbitmap_intersect_of_successors    sbitmap_intersect_of_predsucc
122
123 extern void sbitmap_union_of_predsucc PROTO ((sbitmap, sbitmap *, int,
124                                               struct int_list **));
125 #define sbitmap_union_of_predecessors  sbitmap_union_of_predsucc
126 #define sbitmap_union_of_successors    sbitmap_union_of_predsucc
127
128 /* Intersection and Union of preds/succs using the new flow graph 
129    structure instead of the pred/succ arrays.  */
130
131 extern void sbitmap_intersection_of_succs    PROTO ((sbitmap, sbitmap *, int));
132 extern void sbitmap_intersection_of_preds    PROTO ((sbitmap, sbitmap *, int));
133 extern void sbitmap_union_of_succs           PROTO ((sbitmap, sbitmap *, int));
134 extern void sbitmap_union_of_preds           PROTO ((sbitmap, sbitmap *, int));
135
136 #endif /* _SBITMAP_H */