2 Copyright (C) 1999, 2000, 2002, 2003, 2004, 2006, 2007
3 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
25 /* It's not clear yet whether using bitmap.[ch] will be a win.
26 It should be straightforward to convert so for now we keep things simple
27 while more important issues are dealt with. */
29 #define SBITMAP_ELT_BITS ((unsigned) HOST_BITS_PER_WIDEST_FAST_INT)
30 #define SBITMAP_ELT_TYPE unsigned HOST_WIDEST_FAST_INT
32 /* Can't use SBITMAP_ELT_BITS in this macro because it contains a
33 cast. There is no perfect macro in GCC to test against. This
34 suffices for roughly 99% of the hosts we run on, and the rest
35 don't have 256 bit integers. */
36 #if HOST_BITS_PER_WIDEST_FAST_INT > 255
37 #error Need to increase size of datatype used for popcount
40 typedef struct simple_bitmap_def
42 unsigned char *popcount
; /* Population count. */
43 unsigned int n_bits
; /* Number of bits. */
44 unsigned int size
; /* Size in elements. */
45 SBITMAP_ELT_TYPE elms
[1]; /* The elements. */
47 typedef const struct simple_bitmap_def
*const_sbitmap
;
49 typedef SBITMAP_ELT_TYPE
*sbitmap_ptr
;
50 typedef const SBITMAP_ELT_TYPE
*const_sbitmap_ptr
;
52 /* Return the set size needed for N elements. */
53 #define SBITMAP_SET_SIZE(N) (((N) + SBITMAP_ELT_BITS - 1) / SBITMAP_ELT_BITS)
54 #define SBITMAP_SIZE_BYTES(BITMAP) ((BITMAP)->size * sizeof (SBITMAP_ELT_TYPE))
56 /* Test if bit number bitno in the bitmap is set. */
57 #define TEST_BIT(BITMAP, BITNO) \
58 ((BITMAP)->elms [(BITNO) / SBITMAP_ELT_BITS] >> (BITNO) % SBITMAP_ELT_BITS & 1)
60 /* Set bit number BITNO in the sbitmap MAP. Updates population count
61 if this bitmap has one. */
64 SET_BIT (sbitmap map
, unsigned int bitno
)
69 oldbit
= TEST_BIT (map
, bitno
);
71 map
->popcount
[bitno
/ SBITMAP_ELT_BITS
]++;
73 map
->elms
[bitno
/ SBITMAP_ELT_BITS
]
74 |= (SBITMAP_ELT_TYPE
) 1 << (bitno
) % SBITMAP_ELT_BITS
;
79 /* Reset bit number BITNO in the sbitmap MAP. Updates population
80 count if this bitmap has one. */
83 RESET_BIT (sbitmap map
, unsigned int bitno
)
88 oldbit
= TEST_BIT (map
, bitno
);
90 map
->popcount
[bitno
/ SBITMAP_ELT_BITS
]--;
92 map
->elms
[bitno
/ SBITMAP_ELT_BITS
]
93 &= ~((SBITMAP_ELT_TYPE
) 1 << (bitno
) % SBITMAP_ELT_BITS
);
96 /* The iterator for sbitmap. */
98 /* The pointer to the first word of the bitmap. */
99 const SBITMAP_ELT_TYPE
*ptr
;
101 /* The size of the bitmap. */
104 /* The current word index. */
105 unsigned int word_num
;
107 /* The current bit index (not modulo SBITMAP_ELT_BITS). */
108 unsigned int bit_num
;
110 /* The words currently visited. */
111 SBITMAP_ELT_TYPE word
;
114 /* Initialize the iterator I with sbitmap BMP and the initial index
118 sbitmap_iter_init (sbitmap_iterator
*i
, const_sbitmap bmp
, unsigned int min
)
120 i
->word_num
= min
/ (unsigned int) SBITMAP_ELT_BITS
;
125 if (i
->word_num
>= i
->size
)
128 i
->word
= (i
->ptr
[i
->word_num
]
129 >> (i
->bit_num
% (unsigned int) SBITMAP_ELT_BITS
));
132 /* Return true if we have more bits to visit, in which case *N is set
133 to the index of the bit to be visited. Otherwise, return
137 sbitmap_iter_cond (sbitmap_iterator
*i
, unsigned int *n
)
139 /* Skip words that are zeros. */
140 for (; i
->word
== 0; i
->word
= i
->ptr
[i
->word_num
])
144 /* If we have reached the end, break. */
145 if (i
->word_num
>= i
->size
)
148 i
->bit_num
= i
->word_num
* SBITMAP_ELT_BITS
;
151 /* Skip bits that are zero. */
152 for (; (i
->word
& 1) == 0; i
->word
>>= 1)
160 /* Advance to the next bit. */
163 sbitmap_iter_next (sbitmap_iterator
*i
)
169 /* Loop over all elements of SBITMAP, starting with MIN. In each
170 iteration, N is set to the index of the bit being visited. ITER is
171 an instance of sbitmap_iterator used to iterate the bitmap. */
173 #define EXECUTE_IF_SET_IN_SBITMAP(SBITMAP, MIN, N, ITER) \
174 for (sbitmap_iter_init (&(ITER), (SBITMAP), (MIN)); \
175 sbitmap_iter_cond (&(ITER), &(N)); \
176 sbitmap_iter_next (&(ITER)))
178 #define EXECUTE_IF_SET_IN_SBITMAP_REV(SBITMAP, N, CODE) \
180 unsigned int word_num_; \
181 unsigned int bit_num_; \
182 unsigned int size_ = (SBITMAP)->size; \
183 SBITMAP_ELT_TYPE *ptr_ = (SBITMAP)->elms; \
185 for (word_num_ = size_; word_num_ > 0; word_num_--) \
187 SBITMAP_ELT_TYPE word_ = ptr_[word_num_ - 1]; \
190 for (bit_num_ = SBITMAP_ELT_BITS; bit_num_ > 0; bit_num_--) \
192 SBITMAP_ELT_TYPE _mask = (SBITMAP_ELT_TYPE)1 << (bit_num_ - 1);\
194 if ((word_ & _mask) != 0) \
197 (N) = (word_num_ - 1) * SBITMAP_ELT_BITS + bit_num_ - 1;\
206 #define sbitmap_free(MAP) (free((MAP)->popcount), free((MAP)))
207 #define sbitmap_vector_free(VEC) free(VEC)
211 extern void dump_sbitmap (FILE *, const_sbitmap
);
212 extern void dump_sbitmap_file (FILE *, const_sbitmap
);
213 extern void dump_sbitmap_vector (FILE *, const char *, const char *, sbitmap
*,
215 extern sbitmap
sbitmap_alloc (unsigned int);
216 extern sbitmap
sbitmap_alloc_with_popcount (unsigned int);
217 extern sbitmap
*sbitmap_vector_alloc (unsigned int, unsigned int);
218 extern sbitmap
sbitmap_resize (sbitmap
, unsigned int, int);
219 extern void sbitmap_copy (sbitmap
, const_sbitmap
);
220 extern void sbitmap_copy_n (sbitmap
, const_sbitmap
, unsigned int);
221 extern int sbitmap_equal (const_sbitmap
, const_sbitmap
);
222 extern bool sbitmap_empty_p (const_sbitmap
);
223 extern void sbitmap_zero (sbitmap
);
224 extern void sbitmap_ones (sbitmap
);
225 extern void sbitmap_vector_zero (sbitmap
*, unsigned int);
226 extern void sbitmap_vector_ones (sbitmap
*, unsigned int);
228 extern void sbitmap_union_of_diff (sbitmap
, const_sbitmap
, const_sbitmap
, const_sbitmap
);
229 extern bool sbitmap_union_of_diff_cg (sbitmap
, const_sbitmap
, const_sbitmap
, const_sbitmap
);
230 extern void sbitmap_difference (sbitmap
, const_sbitmap
, const_sbitmap
);
231 extern void sbitmap_not (sbitmap
, const_sbitmap
);
232 extern void sbitmap_a_or_b_and_c (sbitmap
, const_sbitmap
, const_sbitmap
, const_sbitmap
);
233 extern bool sbitmap_a_or_b_and_c_cg (sbitmap
, const_sbitmap
, const_sbitmap
, const_sbitmap
);
234 extern void sbitmap_a_and_b_or_c (sbitmap
, const_sbitmap
, const_sbitmap
, const_sbitmap
);
235 extern bool sbitmap_a_and_b_or_c_cg (sbitmap
, const_sbitmap
, const_sbitmap
, const_sbitmap
);
236 extern bool sbitmap_any_common_bits (const_sbitmap
, const_sbitmap
);
237 extern void sbitmap_a_and_b (sbitmap
, const_sbitmap
, const_sbitmap
);
238 extern bool sbitmap_a_and_b_cg (sbitmap
, const_sbitmap
, const_sbitmap
);
239 extern void sbitmap_a_or_b (sbitmap
, const_sbitmap
, const_sbitmap
);
240 extern bool sbitmap_a_or_b_cg (sbitmap
, const_sbitmap
, const_sbitmap
);
241 extern void sbitmap_a_xor_b (sbitmap
, const_sbitmap
, const_sbitmap
);
242 extern bool sbitmap_a_xor_b_cg (sbitmap
, const_sbitmap
, const_sbitmap
);
243 extern bool sbitmap_a_subset_b_p (const_sbitmap
, const_sbitmap
);
245 extern int sbitmap_first_set_bit (const_sbitmap
);
246 extern int sbitmap_last_set_bit (const_sbitmap
);
248 extern void sbitmap_intersect_of_predsucc (sbitmap
, sbitmap
*, int,
250 #define sbitmap_intersect_of_predecessors sbitmap_intersect_of_predsucc
251 #define sbitmap_intersect_of_successors sbitmap_intersect_of_predsucc
253 extern void sbitmap_union_of_predsucc (sbitmap
, sbitmap
*, int,
255 #define sbitmap_union_of_predecessors sbitmap_union_of_predsucc
256 #define sbitmap_union_of_successors sbitmap_union_of_predsucc
258 /* Intersection and Union of preds/succs using the new flow graph
259 structure instead of the pred/succ arrays. */
261 extern void sbitmap_intersection_of_succs (sbitmap
, sbitmap
*, int);
262 extern void sbitmap_intersection_of_preds (sbitmap
, sbitmap
*, int);
263 extern void sbitmap_union_of_succs (sbitmap
, sbitmap
*, int);
264 extern void sbitmap_union_of_preds (sbitmap
, sbitmap
*, int);
266 extern void debug_sbitmap (const_sbitmap
);
267 extern sbitmap
sbitmap_realloc (sbitmap
, unsigned int);
268 extern unsigned long sbitmap_popcount(const_sbitmap
, unsigned long);
269 extern void sbitmap_verify_popcount (const_sbitmap
);
270 #endif /* ! GCC_SBITMAP_H */