1 /* Functions to support general ended bitmaps.
2 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005
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, 59 Temple Place - Suite 330, Boston, MA
24 #include "coretypes.h"
33 bitmap_element bitmap_zero_bits; /* An element of all zero bits. */
34 bitmap_obstack bitmap_default_obstack; /* The default bitmap obstack. */
35 static GTY((deletable)) bitmap_element *bitmap_ggc_free; /* Freelist of
38 static void bitmap_elem_to_freelist (bitmap, bitmap_element *);
39 static void bitmap_element_free (bitmap, bitmap_element *);
40 static bitmap_element *bitmap_element_allocate (bitmap);
41 static int bitmap_element_zerop (bitmap_element *);
42 static void bitmap_element_link (bitmap, bitmap_element *);
43 static bitmap_element *bitmap_elt_insert_after (bitmap, bitmap_element *);
44 static void bitmap_elt_clear_from (bitmap, bitmap_element *);
45 static bitmap_element *bitmap_find_bit (bitmap, unsigned int);
48 /* Add ELEM to the appropriate freelist. */
50 bitmap_elem_to_freelist (bitmap head, bitmap_element *elt)
52 bitmap_obstack *bit_obstack = head->obstack;
57 elt->prev = bit_obstack->elements;
58 bit_obstack->elements = elt;
62 elt->prev = bitmap_ggc_free;
63 bitmap_ggc_free = elt;
67 /* Free a bitmap element. Since these are allocated off the
68 bitmap_obstack, "free" actually means "put onto the freelist". */
71 bitmap_element_free (bitmap head, bitmap_element *elt)
73 bitmap_element *next = elt->next;
74 bitmap_element *prev = elt->prev;
82 if (head->first == elt)
85 /* Since the first thing we try is to insert before current,
86 make current the next entry in preference to the previous. */
87 if (head->current == elt)
89 head->current = next != 0 ? next : prev;
91 head->indx = head->current->indx;
93 bitmap_elem_to_freelist (head, elt);
96 /* Allocate a bitmap element. The bits are cleared, but nothing else is. */
98 static inline bitmap_element *
99 bitmap_element_allocate (bitmap head)
101 bitmap_element *element;
102 bitmap_obstack *bit_obstack = head->obstack;
106 element = bit_obstack->elements;
109 /* Use up the inner list first before looking at the next
110 element of the outer list. */
113 bit_obstack->elements = element->next;
114 bit_obstack->elements->prev = element->prev;
117 /* Inner list was just a singleton. */
118 bit_obstack->elements = element->prev;
120 element = XOBNEW (&bit_obstack->obstack, bitmap_element);
124 element = bitmap_ggc_free;
126 /* Use up the inner list first before looking at the next
127 element of the outer list. */
130 bitmap_ggc_free = element->next;
131 bitmap_ggc_free->prev = element->prev;
134 /* Inner list was just a singleton. */
135 bitmap_ggc_free = element->prev;
137 element = GGC_NEW (bitmap_element);
140 memset (element->bits, 0, sizeof (element->bits));
145 /* Remove ELT and all following elements from bitmap HEAD. */
148 bitmap_elt_clear_from (bitmap head, bitmap_element *elt)
150 bitmap_element *prev;
151 bitmap_obstack *bit_obstack = head->obstack;
159 if (head->current->indx > prev->indx)
161 head->current = prev;
162 head->indx = prev->indx;
168 head->current = NULL;
172 /* Put the entire list onto the free list in one operation. */
175 elt->prev = bit_obstack->elements;
176 bit_obstack->elements = elt;
180 elt->prev = bitmap_ggc_free;
181 bitmap_ggc_free = elt;
185 /* Clear a bitmap by freeing the linked list. */
188 bitmap_clear (bitmap head)
191 bitmap_elt_clear_from (head, head->first);
194 /* Initialize a bitmap obstack. If BIT_OBSTACK is NULL, initialize
195 the default bitmap obstack. */
198 bitmap_obstack_initialize (bitmap_obstack *bit_obstack)
201 bit_obstack = &bitmap_default_obstack;
203 #if !defined(__GNUC__) || (__GNUC__ < 2)
204 #define __alignof__(type) 0
207 bit_obstack->elements = NULL;
208 bit_obstack->heads = NULL;
209 obstack_specify_allocation (&bit_obstack->obstack, OBSTACK_CHUNK_SIZE,
210 __alignof__ (bitmap_element),
215 /* Release the memory from a bitmap obstack. If BIT_OBSTACK is NULL,
216 release the default bitmap obstack. */
219 bitmap_obstack_release (bitmap_obstack *bit_obstack)
222 bit_obstack = &bitmap_default_obstack;
224 bit_obstack->elements = NULL;
225 bit_obstack->heads = NULL;
226 obstack_free (&bit_obstack->obstack, NULL);
229 /* Create a new bitmap on an obstack. If BIT_OBSTACK is NULL, create
230 it on the default bitmap obstack. */
233 bitmap_obstack_alloc (bitmap_obstack *bit_obstack)
238 bit_obstack = &bitmap_default_obstack;
239 map = bit_obstack->heads;
241 bit_obstack->heads = (void *)map->first;
243 map = XOBNEW (&bit_obstack->obstack, bitmap_head);
244 bitmap_initialize (map, bit_obstack);
249 /* Create a new GCd bitmap. */
252 bitmap_gc_alloc (void)
256 map = GGC_NEW (struct bitmap_head_def);
257 bitmap_initialize (map, NULL);
262 /* Release an obstack allocated bitmap. */
265 bitmap_obstack_free (bitmap map)
270 map->first = (void *)map->obstack->heads;
271 map->obstack->heads = map;
276 /* Return nonzero if all bits in an element are zero. */
279 bitmap_element_zerop (bitmap_element *element)
281 #if BITMAP_ELEMENT_WORDS == 2
282 return (element->bits[0] | element->bits[1]) == 0;
286 for (i = 0; i < BITMAP_ELEMENT_WORDS; i++)
287 if (element->bits[i] != 0)
294 /* Link the bitmap element into the current bitmap linked list. */
297 bitmap_element_link (bitmap head, bitmap_element *element)
299 unsigned int indx = element->indx;
302 /* If this is the first and only element, set it in. */
303 if (head->first == 0)
305 element->next = element->prev = 0;
306 head->first = element;
309 /* If this index is less than that of the current element, it goes someplace
310 before the current element. */
311 else if (indx < head->indx)
313 for (ptr = head->current;
314 ptr->prev != 0 && ptr->prev->indx > indx;
319 ptr->prev->next = element;
321 head->first = element;
323 element->prev = ptr->prev;
328 /* Otherwise, it must go someplace after the current element. */
331 for (ptr = head->current;
332 ptr->next != 0 && ptr->next->indx < indx;
337 ptr->next->prev = element;
339 element->next = ptr->next;
344 /* Set up so this is the first element searched. */
345 head->current = element;
349 /* Insert a new uninitialized element into bitmap HEAD after element
350 ELT. If ELT is NULL, insert the element at the start. Return the
353 static bitmap_element *
354 bitmap_elt_insert_after (bitmap head, bitmap_element *elt)
356 bitmap_element *node = bitmap_element_allocate (head);
361 head->current = node;
362 node->next = head->first;
364 node->next->prev = node;
370 gcc_assert (head->current);
371 node->next = elt->next;
373 node->next->prev = node;
380 /* Copy a bitmap to another bitmap. */
383 bitmap_copy (bitmap to, bitmap from)
385 bitmap_element *from_ptr, *to_ptr = 0;
389 /* Copy elements in forward direction one at a time. */
390 for (from_ptr = from->first; from_ptr; from_ptr = from_ptr->next)
392 bitmap_element *to_elt = bitmap_element_allocate (to);
394 to_elt->indx = from_ptr->indx;
395 memcpy (to_elt->bits, from_ptr->bits, sizeof (to_elt->bits));
397 /* Here we have a special case of bitmap_element_link, for the case
398 where we know the links are being entered in sequence. */
401 to->first = to->current = to_elt;
402 to->indx = from_ptr->indx;
403 to_elt->next = to_elt->prev = 0;
407 to_elt->prev = to_ptr;
409 to_ptr->next = to_elt;
416 /* Find a bitmap element that would hold a bitmap's bit.
417 Update the `current' field even if we can't find an element that
418 would hold the bitmap's bit to make eventual allocation
421 static inline bitmap_element *
422 bitmap_find_bit (bitmap head, unsigned int bit)
424 bitmap_element *element;
425 unsigned int indx = bit / BITMAP_ELEMENT_ALL_BITS;
427 if (head->current == 0
428 || head->indx == indx)
429 return head->current;
431 if (head->indx < indx)
432 /* INDX is beyond head->indx. Search from head->current
434 for (element = head->current;
435 element->next != 0 && element->indx < indx;
436 element = element->next)
439 else if (head->indx / 2 < indx)
440 /* INDX is less than head->indx and closer to head->indx than to
441 0. Search from head->current backward. */
442 for (element = head->current;
443 element->prev != 0 && element->indx > indx;
444 element = element->prev)
448 /* INDX is less than head->indx and closer to 0 than to
449 head->indx. Search from head->first forward. */
450 for (element = head->first;
451 element->next != 0 && element->indx < indx;
452 element = element->next)
455 /* `element' is the nearest to the one we want. If it's not the one we
456 want, the one we want doesn't exist. */
457 head->current = element;
458 head->indx = element->indx;
459 if (element != 0 && element->indx != indx)
465 /* Clear a single bit in a bitmap. */
468 bitmap_clear_bit (bitmap head, int bit)
470 bitmap_element *ptr = bitmap_find_bit (head, bit);
474 unsigned bit_num = bit % BITMAP_WORD_BITS;
475 unsigned word_num = bit / BITMAP_WORD_BITS % BITMAP_ELEMENT_WORDS;
476 ptr->bits[word_num] &= ~ (((BITMAP_WORD) 1) << bit_num);
478 /* If we cleared the entire word, free up the element. */
479 if (bitmap_element_zerop (ptr))
480 bitmap_element_free (head, ptr);
484 /* Set a single bit in a bitmap. */
487 bitmap_set_bit (bitmap head, int bit)
489 bitmap_element *ptr = bitmap_find_bit (head, bit);
490 unsigned word_num = bit / BITMAP_WORD_BITS % BITMAP_ELEMENT_WORDS;
491 unsigned bit_num = bit % BITMAP_WORD_BITS;
492 BITMAP_WORD bit_val = ((BITMAP_WORD) 1) << bit_num;
496 ptr = bitmap_element_allocate (head);
497 ptr->indx = bit / BITMAP_ELEMENT_ALL_BITS;
498 ptr->bits[word_num] = bit_val;
499 bitmap_element_link (head, ptr);
502 ptr->bits[word_num] |= bit_val;
505 /* Return whether a bit is set within a bitmap. */
508 bitmap_bit_p (bitmap head, int bit)
514 ptr = bitmap_find_bit (head, bit);
518 bit_num = bit % BITMAP_WORD_BITS;
519 word_num = bit / BITMAP_WORD_BITS % BITMAP_ELEMENT_WORDS;
521 return (ptr->bits[word_num] >> bit_num) & 1;
524 /* Return the bit number of the first set bit in the bitmap. The
525 bitmap must be non-empty. */
528 bitmap_first_set_bit (bitmap a)
530 bitmap_element *elt = a->first;
536 bit_no = elt->indx * BITMAP_ELEMENT_ALL_BITS;
537 for (ix = 0; ix != BITMAP_ELEMENT_WORDS; ix++)
539 word = elt->bits[ix];
545 bit_no += ix * BITMAP_WORD_BITS;
547 #if GCC_VERSION >= 3004
548 gcc_assert (sizeof(long) == sizeof (word));
549 bit_no += __builtin_ctzl (word);
551 /* Binary search for the first set bit. */
552 #if BITMAP_WORD_BITS > 64
553 #error "Fill out the table."
555 #if BITMAP_WORD_BITS > 32
556 if (!(word & 0xffffffff))
557 word >>= 32, bit_no += 32;
559 if (!(word & 0xffff))
560 word >>= 16, bit_no += 16;
562 word >>= 8, bit_no += 8;
564 word >>= 4, bit_no += 4;
566 word >>= 2, bit_no += 2;
568 word >>= 1, bit_no += 1;
570 gcc_assert (word & 1);
579 bitmap_and (bitmap dst, bitmap a, bitmap b)
581 bitmap_element *dst_elt = dst->first;
582 bitmap_element *a_elt = a->first;
583 bitmap_element *b_elt = b->first;
584 bitmap_element *dst_prev = NULL;
586 gcc_assert (dst != a && dst != b && a != b);
587 while (a_elt && b_elt)
589 if (a_elt->indx < b_elt->indx)
591 else if (b_elt->indx < a_elt->indx)
595 /* Matching elts, generate A & B. */
600 dst_elt = bitmap_elt_insert_after (dst, dst_prev);
602 dst_elt->indx = a_elt->indx;
603 for (ix = BITMAP_ELEMENT_WORDS; ix--;)
605 BITMAP_WORD r = a_elt->bits[ix] & b_elt->bits[ix];
607 dst_elt->bits[ix] = r;
613 dst_elt = dst_elt->next;
619 bitmap_elt_clear_from (dst, dst_elt);
620 gcc_assert (!dst->current == !dst->first);
622 dst->indx = dst->current->indx;
628 bitmap_and_into (bitmap a, bitmap b)
630 bitmap_element *a_elt = a->first;
631 bitmap_element *b_elt = b->first;
632 bitmap_element *next;
635 while (a_elt && b_elt)
637 if (a_elt->indx < b_elt->indx)
640 bitmap_element_free (a, a_elt);
643 else if (b_elt->indx < a_elt->indx)
647 /* Matching elts, generate A &= B. */
651 for (ix = BITMAP_ELEMENT_WORDS; ix--;)
653 BITMAP_WORD r = a_elt->bits[ix] & b_elt->bits[ix];
660 bitmap_element_free (a, a_elt);
665 bitmap_elt_clear_from (a, a_elt);
666 gcc_assert (!a->current == !a->first);
667 gcc_assert (!a->current || a->indx == a->current->indx);
673 bitmap_and_compl (bitmap dst, bitmap a, bitmap b)
675 bitmap_element *dst_elt = dst->first;
676 bitmap_element *a_elt = a->first;
677 bitmap_element *b_elt = b->first;
678 bitmap_element *dst_prev = NULL;
680 gcc_assert (dst != a && dst != b && a != b);
684 if (!b_elt || a_elt->indx < b_elt->indx)
688 dst_elt = bitmap_elt_insert_after (dst, dst_prev);
690 dst_elt->indx = a_elt->indx;
691 memcpy (dst_elt->bits, a_elt->bits, sizeof (dst_elt->bits));
693 dst_elt = dst_elt->next;
696 else if (b_elt->indx < a_elt->indx)
700 /* Matching elts, generate A & ~B. */
705 dst_elt = bitmap_elt_insert_after (dst, dst_prev);
707 dst_elt->indx = a_elt->indx;
708 for (ix = BITMAP_ELEMENT_WORDS; ix--;)
710 BITMAP_WORD r = a_elt->bits[ix] & ~b_elt->bits[ix];
712 dst_elt->bits[ix] = r;
718 dst_elt = dst_elt->next;
724 bitmap_elt_clear_from (dst, dst_elt);
725 gcc_assert (!dst->current == !dst->first);
727 dst->indx = dst->current->indx;
730 /* A &= ~B. Returns true if A changes */
733 bitmap_and_compl_into (bitmap a, bitmap b)
735 bitmap_element *a_elt = a->first;
736 bitmap_element *b_elt = b->first;
737 bitmap_element *next;
738 BITMAP_WORD changed = 0;
741 while (a_elt && b_elt)
743 if (a_elt->indx < b_elt->indx)
745 else if (b_elt->indx < a_elt->indx)
749 /* Matching elts, generate A &= ~B. */
753 for (ix = BITMAP_ELEMENT_WORDS; ix--;)
755 BITMAP_WORD cleared = a_elt->bits[ix] & b_elt->bits[ix];
756 BITMAP_WORD r = a_elt->bits[ix] ^ cleared;
764 bitmap_element_free (a, a_elt);
769 gcc_assert (!a->current == !a->first);
770 gcc_assert (!a->current || a->indx == a->current->indx);
774 /* DST = A | B. Return true if DST changes. */
777 bitmap_ior (bitmap dst, bitmap a, bitmap b)
779 bitmap_element *dst_elt = dst->first;
780 bitmap_element *a_elt = a->first;
781 bitmap_element *b_elt = b->first;
782 bitmap_element *dst_prev = NULL;
783 bool changed = false;
785 gcc_assert (dst != a && dst != b && a != b);
786 while (a_elt || b_elt)
788 if (a_elt && b_elt && a_elt->indx == b_elt->indx)
790 /* Matching elts, generate A | B. */
793 if (!changed && dst_elt && dst_elt->indx == a_elt->indx)
795 for (ix = BITMAP_ELEMENT_WORDS; ix--;)
797 BITMAP_WORD r = a_elt->bits[ix] | b_elt->bits[ix];
799 if (r != dst_elt->bits[ix])
801 dst_elt->bits[ix] = r;
810 dst_elt = bitmap_elt_insert_after (dst, dst_prev);
811 dst_elt->indx = a_elt->indx;
812 for (ix = BITMAP_ELEMENT_WORDS; ix--;)
814 BITMAP_WORD r = a_elt->bits[ix] | b_elt->bits[ix];
816 dst_elt->bits[ix] = r;
822 dst_elt = dst_elt->next;
826 /* Copy a single element. */
829 if (!b_elt || (a_elt && a_elt->indx < b_elt->indx))
840 if (!changed && dst_elt && dst_elt->indx == src->indx)
844 for (ix = BITMAP_ELEMENT_WORDS; ix--;)
845 if (src->bits[ix] != dst_elt->bits[ix])
847 dst_elt->bits[ix] = src->bits[ix];
855 dst_elt = bitmap_elt_insert_after (dst, dst_prev);
856 dst_elt->indx = src->indx;
857 memcpy (dst_elt->bits, src->bits, sizeof (dst_elt->bits));
861 dst_elt = dst_elt->next;
868 bitmap_elt_clear_from (dst, dst_elt);
870 gcc_assert (!dst->current == !dst->first);
872 dst->indx = dst->current->indx;
876 /* A |= B. Return true if A changes. */
879 bitmap_ior_into (bitmap a, bitmap b)
881 bitmap_element *a_elt = a->first;
882 bitmap_element *b_elt = b->first;
883 bitmap_element *a_prev = NULL;
884 bool changed = false;
889 if (!a_elt || b_elt->indx < a_elt->indx)
892 bitmap_element *dst = bitmap_elt_insert_after (a, a_prev);
894 dst->indx = b_elt->indx;
895 memcpy (dst->bits, b_elt->bits, sizeof (dst->bits));
900 else if (a_elt->indx < b_elt->indx)
907 /* Matching elts, generate A |= B. */
911 for (ix = BITMAP_ELEMENT_WORDS; ix--;)
913 BITMAP_WORD r = a_elt->bits[ix] | b_elt->bits[ix];
918 for (ix = BITMAP_ELEMENT_WORDS; ix--;)
920 BITMAP_WORD r = a_elt->bits[ix] | b_elt->bits[ix];
922 if (a_elt->bits[ix] != r)
933 gcc_assert (!a->current == !a->first);
935 a->indx = a->current->indx;
942 bitmap_xor (bitmap dst, bitmap a, bitmap b)
944 bitmap_element *dst_elt = dst->first;
945 bitmap_element *a_elt = a->first;
946 bitmap_element *b_elt = b->first;
947 bitmap_element *dst_prev = NULL;
949 gcc_assert (dst != a && dst != b && a != b);
950 while (a_elt || b_elt)
952 if (a_elt && b_elt && a_elt->indx == b_elt->indx)
954 /* Matching elts, generate A ^ B. */
959 dst_elt = bitmap_elt_insert_after (dst, dst_prev);
961 dst_elt->indx = a_elt->indx;
962 for (ix = BITMAP_ELEMENT_WORDS; ix--;)
964 BITMAP_WORD r = a_elt->bits[ix] ^ b_elt->bits[ix];
967 dst_elt->bits[ix] = r;
974 dst_elt = dst_elt->next;
979 /* Copy a single element. */
982 if (!b_elt || (a_elt && a_elt->indx < b_elt->indx))
994 dst_elt = bitmap_elt_insert_after (dst, dst_prev);
996 dst_elt->indx = src->indx;
997 memcpy (dst_elt->bits, src->bits, sizeof (dst_elt->bits));
999 dst_elt = dst_elt->next;
1002 bitmap_elt_clear_from (dst, dst_elt);
1003 gcc_assert (!dst->current == !dst->first);
1005 dst->indx = dst->current->indx;
1011 bitmap_xor_into (bitmap a, bitmap b)
1013 bitmap_element *a_elt = a->first;
1014 bitmap_element *b_elt = b->first;
1015 bitmap_element *a_prev = NULL;
1017 gcc_assert (a != b);
1020 if (!a_elt || b_elt->indx < a_elt->indx)
1023 bitmap_element *dst = bitmap_elt_insert_after (a, a_prev);
1025 dst->indx = b_elt->indx;
1026 memcpy (dst->bits, b_elt->bits, sizeof (dst->bits));
1028 b_elt = b_elt->next;
1030 else if (a_elt->indx < b_elt->indx)
1033 a_elt = a_elt->next;
1037 /* Matching elts, generate A ^= B. */
1039 BITMAP_WORD ior = 0;
1040 bitmap_element *next = a_elt->next;
1042 for (ix = BITMAP_ELEMENT_WORDS; ix--;)
1044 BITMAP_WORD r = a_elt->bits[ix] ^ b_elt->bits[ix];
1047 a_elt->bits[ix] = r;
1049 b_elt = b_elt->next;
1053 bitmap_element_free (a, a_elt);
1057 gcc_assert (!a->current == !a->first);
1059 a->indx = a->current->indx;
1062 /* Return true if two bitmaps are identical.
1063 We do not bother with a check for pointer equality, as that never
1064 occurs in practice. */
1067 bitmap_equal_p (bitmap a, bitmap b)
1069 bitmap_element *a_elt;
1070 bitmap_element *b_elt;
1073 for (a_elt = a->first, b_elt = b->first;
1075 a_elt = a_elt->next, b_elt = b_elt->next)
1077 if (a_elt->indx != b_elt->indx)
1079 for (ix = BITMAP_ELEMENT_WORDS; ix--;)
1080 if (a_elt->bits[ix] != b_elt->bits[ix])
1083 return !a_elt && !b_elt;
1086 /* Return true if A AND B is not empty. */
1089 bitmap_intersect_p (bitmap a, bitmap b)
1091 bitmap_element *a_elt;
1092 bitmap_element *b_elt;
1095 for (a_elt = a->first, b_elt = b->first;
1098 if (a_elt->indx < b_elt->indx)
1099 a_elt = a_elt->next;
1100 else if (b_elt->indx < a_elt->indx)
1101 b_elt = b_elt->next;
1104 for (ix = BITMAP_ELEMENT_WORDS; ix--;)
1105 if (a_elt->bits[ix] & b_elt->bits[ix])
1107 a_elt = a_elt->next;
1108 b_elt = b_elt->next;
1114 /* Return true if A AND NOT B is not empty. */
1117 bitmap_intersect_compl_p (bitmap a, bitmap b)
1119 bitmap_element *a_elt;
1120 bitmap_element *b_elt;
1122 for (a_elt = a->first, b_elt = b->first;
1125 if (a_elt->indx < b_elt->indx)
1127 else if (b_elt->indx < a_elt->indx)
1128 b_elt = b_elt->next;
1131 for (ix = BITMAP_ELEMENT_WORDS; ix--;)
1132 if (a_elt->bits[ix] & ~b_elt->bits[ix])
1134 a_elt = a_elt->next;
1135 b_elt = b_elt->next;
1138 return a_elt != NULL;
1142 /* DST = A | (FROM1 & ~FROM2). Return true if DST changes. */
1145 bitmap_ior_and_compl (bitmap dst, bitmap a, bitmap from1, bitmap from2)
1150 bitmap_initialize (&tmp, &bitmap_default_obstack);
1151 bitmap_and_compl (&tmp, from1, from2);
1152 changed = bitmap_ior (dst, a, &tmp);
1153 bitmap_clear (&tmp);
1158 /* A |= (FROM1 & ~FROM2). Return true if A changes. */
1161 bitmap_ior_and_compl_into (bitmap a, bitmap from1, bitmap from2)
1166 bitmap_initialize (&tmp, &bitmap_default_obstack);
1167 bitmap_and_compl (&tmp, from1, from2);
1168 changed = bitmap_ior_into (a, &tmp);
1169 bitmap_clear (&tmp);
1174 /* Debugging function to print out the contents of a bitmap. */
1177 debug_bitmap_file (FILE *file, bitmap head)
1179 bitmap_element *ptr;
1181 fprintf (file, "\nfirst = " HOST_PTR_PRINTF
1182 " current = " HOST_PTR_PRINTF " indx = %u\n",
1183 (void *) head->first, (void *) head->current, head->indx);
1185 for (ptr = head->first; ptr; ptr = ptr->next)
1187 unsigned int i, j, col = 26;
1189 fprintf (file, "\t" HOST_PTR_PRINTF " next = " HOST_PTR_PRINTF
1190 " prev = " HOST_PTR_PRINTF " indx = %u\n\t\tbits = {",
1191 (void*) ptr, (void*) ptr->next, (void*) ptr->prev, ptr->indx);
1193 for (i = 0; i < BITMAP_ELEMENT_WORDS; i++)
1194 for (j = 0; j < BITMAP_WORD_BITS; j++)
1195 if ((ptr->bits[i] >> j) & 1)
1199 fprintf (file, "\n\t\t\t");
1203 fprintf (file, " %u", (ptr->indx * BITMAP_ELEMENT_ALL_BITS
1204 + i * BITMAP_WORD_BITS + j));
1208 fprintf (file, " }\n");
1212 /* Function to be called from the debugger to print the contents
1216 debug_bitmap (bitmap head)
1218 debug_bitmap_file (stdout, head);
1221 /* Function to print out the contents of a bitmap. Unlike debug_bitmap_file,
1222 it does not print anything but the bits. */
1225 bitmap_print (FILE *file, bitmap head, const char *prefix, const char *suffix)
1227 const char *comma = "";
1231 fputs (prefix, file);
1232 EXECUTE_IF_SET_IN_BITMAP (head, 0, i, bi)
1234 fprintf (file, "%s%d", comma, i);
1237 fputs (suffix, file);
1240 #include "gt-bitmap.h"