/* Simple bitmaps.
- Copyright (C) 1999, 2000, 2002, 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 1999, 2000, 2002, 2003, 2004, 2006, 2007, 2008
+ Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#ifndef GCC_SBITMAP_H
#define GCC_SBITMAP_H
#define SBITMAP_ELT_BITS ((unsigned) HOST_BITS_PER_WIDEST_FAST_INT)
#define SBITMAP_ELT_TYPE unsigned HOST_WIDEST_FAST_INT
-typedef struct simple_bitmap_def
+/* Can't use SBITMAP_ELT_BITS in this macro because it contains a
+ cast. There is no perfect macro in GCC to test against. This
+ suffices for roughly 99% of the hosts we run on, and the rest
+ don't have 256 bit integers. */
+#if HOST_BITS_PER_WIDEST_FAST_INT > 255
+#error Need to increase size of datatype used for popcount
+#endif
+
+struct simple_bitmap_def
{
+ unsigned char *popcount; /* Population count. */
unsigned int n_bits; /* Number of bits. */
unsigned int size; /* Size in elements. */
- unsigned int bytes; /* Size in bytes. */
SBITMAP_ELT_TYPE elms[1]; /* The elements. */
-} *sbitmap;
+};
typedef SBITMAP_ELT_TYPE *sbitmap_ptr;
+typedef const SBITMAP_ELT_TYPE *const_sbitmap_ptr;
/* Return the set size needed for N elements. */
#define SBITMAP_SET_SIZE(N) (((N) + SBITMAP_ELT_BITS - 1) / SBITMAP_ELT_BITS)
-
-/* Set bit number bitno in the bitmap. */
-#define SET_BIT(BITMAP, BITNO) \
- ((BITMAP)->elms [(BITNO) / SBITMAP_ELT_BITS] \
- |= (SBITMAP_ELT_TYPE) 1 << (BITNO) % SBITMAP_ELT_BITS)
+#define SBITMAP_SIZE_BYTES(BITMAP) ((BITMAP)->size * sizeof (SBITMAP_ELT_TYPE))
/* Test if bit number bitno in the bitmap is set. */
#define TEST_BIT(BITMAP, BITNO) \
((BITMAP)->elms [(BITNO) / SBITMAP_ELT_BITS] >> (BITNO) % SBITMAP_ELT_BITS & 1)
-/* Reset bit number bitno in the bitmap. */
-#define RESET_BIT(BITMAP, BITNO) \
- ((BITMAP)->elms [(BITNO) / SBITMAP_ELT_BITS] \
- &= ~((SBITMAP_ELT_TYPE) 1 << (BITNO) % SBITMAP_ELT_BITS))
+/* Set bit number BITNO in the sbitmap MAP. Updates population count
+ if this bitmap has one. */
-/* Loop over all elements of SBITSET, starting with MIN. */
-#define EXECUTE_IF_SET_IN_SBITMAP(SBITMAP, MIN, N, CODE) \
-do { \
- unsigned int word_num_ = (MIN) / (unsigned int) SBITMAP_ELT_BITS; \
- unsigned int bit_num_ = (MIN) % (unsigned int) SBITMAP_ELT_BITS; \
- unsigned int size_ = (SBITMAP)->size; \
- SBITMAP_ELT_TYPE *ptr_ = (SBITMAP)->elms; \
- SBITMAP_ELT_TYPE word_ = ptr_[word_num_] >> bit_num_; \
- \
- for (; \
- word_num_ < size_; \
- word_num_++, bit_num_ = 0, word_ = ptr_[word_num_]) \
- { \
- for (; word_ != 0; word_ >>= 1, bit_num_++) \
- { \
- if ((word_ & 1) != 0) \
- { \
- (N) = word_num_ * SBITMAP_ELT_BITS + bit_num_; \
- CODE; \
- } \
- } \
- } \
-} while (0)
+static inline void
+SET_BIT (sbitmap map, unsigned int bitno)
+{
+ if (map->popcount)
+ {
+ bool oldbit;
+ oldbit = TEST_BIT (map, bitno);
+ if (!oldbit)
+ map->popcount[bitno / SBITMAP_ELT_BITS]++;
+ }
+ map->elms[bitno / SBITMAP_ELT_BITS]
+ |= (SBITMAP_ELT_TYPE) 1 << (bitno) % SBITMAP_ELT_BITS;
+}
+
+
+
+/* Reset bit number BITNO in the sbitmap MAP. Updates population
+ count if this bitmap has one. */
+
+static inline void
+RESET_BIT (sbitmap map, unsigned int bitno)
+{
+ if (map->popcount)
+ {
+ bool oldbit;
+ oldbit = TEST_BIT (map, bitno);
+ if (oldbit)
+ map->popcount[bitno / SBITMAP_ELT_BITS]--;
+ }
+ map->elms[bitno / SBITMAP_ELT_BITS]
+ &= ~((SBITMAP_ELT_TYPE) 1 << (bitno) % SBITMAP_ELT_BITS);
+}
+
+/* The iterator for sbitmap. */
+typedef struct {
+ /* The pointer to the first word of the bitmap. */
+ const SBITMAP_ELT_TYPE *ptr;
+
+ /* The size of the bitmap. */
+ unsigned int size;
+
+ /* The current word index. */
+ unsigned int word_num;
+
+ /* The current bit index (not modulo SBITMAP_ELT_BITS). */
+ unsigned int bit_num;
+
+ /* The words currently visited. */
+ SBITMAP_ELT_TYPE word;
+} sbitmap_iterator;
+
+/* Initialize the iterator I with sbitmap BMP and the initial index
+ MIN. */
+
+static inline void
+sbitmap_iter_init (sbitmap_iterator *i, const_sbitmap bmp, unsigned int min)
+{
+ i->word_num = min / (unsigned int) SBITMAP_ELT_BITS;
+ i->bit_num = min;
+ i->size = bmp->size;
+ i->ptr = bmp->elms;
+
+ if (i->word_num >= i->size)
+ i->word = 0;
+ else
+ i->word = (i->ptr[i->word_num]
+ >> (i->bit_num % (unsigned int) SBITMAP_ELT_BITS));
+}
+
+/* Return true if we have more bits to visit, in which case *N is set
+ to the index of the bit to be visited. Otherwise, return
+ false. */
+
+static inline bool
+sbitmap_iter_cond (sbitmap_iterator *i, unsigned int *n)
+{
+ /* Skip words that are zeros. */
+ for (; i->word == 0; i->word = i->ptr[i->word_num])
+ {
+ i->word_num++;
+
+ /* If we have reached the end, break. */
+ if (i->word_num >= i->size)
+ return false;
+
+ i->bit_num = i->word_num * SBITMAP_ELT_BITS;
+ }
+
+ /* Skip bits that are zero. */
+ for (; (i->word & 1) == 0; i->word >>= 1)
+ i->bit_num++;
+
+ *n = i->bit_num;
+
+ return true;
+}
+
+/* Advance to the next bit. */
+
+static inline void
+sbitmap_iter_next (sbitmap_iterator *i)
+{
+ i->word >>= 1;
+ i->bit_num++;
+}
+
+/* Loop over all elements of SBITMAP, starting with MIN. In each
+ iteration, N is set to the index of the bit being visited. ITER is
+ an instance of sbitmap_iterator used to iterate the bitmap. */
+
+#define EXECUTE_IF_SET_IN_SBITMAP(SBITMAP, MIN, N, ITER) \
+ for (sbitmap_iter_init (&(ITER), (SBITMAP), (MIN)); \
+ sbitmap_iter_cond (&(ITER), &(N)); \
+ sbitmap_iter_next (&(ITER)))
#define EXECUTE_IF_SET_IN_SBITMAP_REV(SBITMAP, N, CODE) \
do { \
} \
} while (0)
-#define sbitmap_free(MAP) free(MAP)
+#define sbitmap_free(MAP) (free((MAP)->popcount), free((MAP)))
#define sbitmap_vector_free(VEC) free(VEC)
struct int_list;
-extern void dump_sbitmap (FILE *, sbitmap);
-extern void dump_sbitmap_file (FILE *, sbitmap);
+extern void dump_sbitmap (FILE *, const_sbitmap);
+extern void dump_sbitmap_file (FILE *, const_sbitmap);
extern void dump_sbitmap_vector (FILE *, const char *, const char *, sbitmap *,
int);
extern sbitmap sbitmap_alloc (unsigned int);
+extern sbitmap sbitmap_alloc_with_popcount (unsigned int);
extern sbitmap *sbitmap_vector_alloc (unsigned int, unsigned int);
extern sbitmap sbitmap_resize (sbitmap, unsigned int, int);
-extern void sbitmap_copy (sbitmap, sbitmap);
-extern int sbitmap_equal (sbitmap, sbitmap);
+extern void sbitmap_copy (sbitmap, const_sbitmap);
+extern void sbitmap_copy_n (sbitmap, const_sbitmap, unsigned int);
+extern int sbitmap_equal (const_sbitmap, const_sbitmap);
+extern bool sbitmap_empty_p (const_sbitmap);
+extern bool sbitmap_range_empty_p (const_sbitmap, unsigned int, unsigned int);
extern void sbitmap_zero (sbitmap);
extern void sbitmap_ones (sbitmap);
extern void sbitmap_vector_zero (sbitmap *, unsigned int);
extern void sbitmap_vector_ones (sbitmap *, unsigned int);
-extern void sbitmap_union_of_diff (sbitmap, sbitmap, sbitmap, sbitmap);
-extern bool sbitmap_union_of_diff_cg (sbitmap, sbitmap, sbitmap, sbitmap);
-extern void sbitmap_difference (sbitmap, sbitmap, sbitmap);
-extern void sbitmap_not (sbitmap, sbitmap);
-extern void sbitmap_a_or_b_and_c (sbitmap, sbitmap, sbitmap, sbitmap);
-extern bool sbitmap_a_or_b_and_c_cg (sbitmap, sbitmap, sbitmap, sbitmap);
-extern void sbitmap_a_and_b_or_c (sbitmap, sbitmap, sbitmap, sbitmap);
-extern bool sbitmap_a_and_b_or_c_cg (sbitmap, sbitmap, sbitmap, sbitmap);
-extern void sbitmap_a_and_b (sbitmap, sbitmap, sbitmap);
-extern bool sbitmap_a_and_b_cg (sbitmap, sbitmap, sbitmap);
-extern void sbitmap_a_or_b (sbitmap, sbitmap, sbitmap);
-extern bool sbitmap_a_or_b_cg (sbitmap, sbitmap, sbitmap);
-extern void sbitmap_a_xor_b (sbitmap, sbitmap, sbitmap);
-extern bool sbitmap_a_xor_b_cg (sbitmap, sbitmap, sbitmap);
-extern bool sbitmap_a_subset_b_p (sbitmap, sbitmap);
-
-extern int sbitmap_first_set_bit (sbitmap);
-extern int sbitmap_last_set_bit (sbitmap);
+extern void sbitmap_union_of_diff (sbitmap, const_sbitmap, const_sbitmap, const_sbitmap);
+extern bool sbitmap_union_of_diff_cg (sbitmap, const_sbitmap, const_sbitmap, const_sbitmap);
+extern void sbitmap_difference (sbitmap, const_sbitmap, const_sbitmap);
+extern void sbitmap_not (sbitmap, const_sbitmap);
+extern void sbitmap_a_or_b_and_c (sbitmap, const_sbitmap, const_sbitmap, const_sbitmap);
+extern bool sbitmap_a_or_b_and_c_cg (sbitmap, const_sbitmap, const_sbitmap, const_sbitmap);
+extern void sbitmap_a_and_b_or_c (sbitmap, const_sbitmap, const_sbitmap, const_sbitmap);
+extern bool sbitmap_a_and_b_or_c_cg (sbitmap, const_sbitmap, const_sbitmap, const_sbitmap);
+extern bool sbitmap_any_common_bits (const_sbitmap, const_sbitmap);
+extern void sbitmap_a_and_b (sbitmap, const_sbitmap, const_sbitmap);
+extern bool sbitmap_a_and_b_cg (sbitmap, const_sbitmap, const_sbitmap);
+extern void sbitmap_a_or_b (sbitmap, const_sbitmap, const_sbitmap);
+extern bool sbitmap_a_or_b_cg (sbitmap, const_sbitmap, const_sbitmap);
+extern void sbitmap_a_xor_b (sbitmap, const_sbitmap, const_sbitmap);
+extern bool sbitmap_a_xor_b_cg (sbitmap, const_sbitmap, const_sbitmap);
+extern bool sbitmap_a_subset_b_p (const_sbitmap, const_sbitmap);
+
+extern int sbitmap_first_set_bit (const_sbitmap);
+extern int sbitmap_last_set_bit (const_sbitmap);
extern void sbitmap_intersect_of_predsucc (sbitmap, sbitmap *, int,
struct int_list **);
extern void sbitmap_union_of_succs (sbitmap, sbitmap *, int);
extern void sbitmap_union_of_preds (sbitmap, sbitmap *, int);
-extern void debug_sbitmap (sbitmap);
+extern void debug_sbitmap (const_sbitmap);
extern sbitmap sbitmap_realloc (sbitmap, unsigned int);
+extern unsigned long sbitmap_popcount(const_sbitmap, unsigned long);
+extern void sbitmap_verify_popcount (const_sbitmap);
#endif /* ! GCC_SBITMAP_H */
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