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/* Simple bitmaps.
Copyright (C) 1999, 2000 Free Software Foundation, Inc.
This file is part of GNU CC.
GNU CC 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 version.
GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef GCC_SBITMAP_H
#define GCC_SBITMAP_H
/* It's not clear yet whether using bitmap.[ch] will be a win.
It should be straightforward to convert so for now we keep things simple
while more important issues are dealt with. */
#define SBITMAP_ELT_BITS ((unsigned) HOST_BITS_PER_WIDE_INT)
#define SBITMAP_ELT_TYPE unsigned HOST_WIDE_INT
typedef struct simple_bitmap_def
{
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;
/* 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)
/* 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))
/* Loop over all elements of SBITSET, starting with MIN. */
#define EXECUTE_IF_SET_IN_SBITMAP(SBITMAP, MIN, N, CODE) \
do { \
unsigned int word_num_; \
unsigned int bit_num_ = (MIN) % (unsigned int) SBITMAP_ELT_BITS; \
unsigned int size_ = (SBITMAP)->size; \
SBITMAP_ELT_TYPE *ptr_ = (SBITMAP)->elms; \
\
for (word_num_ = (MIN) / (unsigned int) SBITMAP_ELT_BITS; \
word_num_ < size_; word_num_++, bit_num_ = 0) \
{ \
SBITMAP_ELT_TYPE word_ = ptr_[word_num_]; \
\
if (word_ != 0) \
for (; bit_num_ < SBITMAP_ELT_BITS; bit_num_++) \
{ \
SBITMAP_ELT_TYPE _mask = (SBITMAP_ELT_TYPE)1 << bit_num_; \
\
if ((word_ & _mask) != 0) \
{ \
word_ &= ~ _mask; \
(N) = word_num_ * SBITMAP_ELT_BITS + bit_num_; \
CODE; \
if (word_ == 0) \
break; \
} \
} \
} \
} while (0)
#define sbitmap_free(MAP) free(MAP)
#define sbitmap_vector_free(VEC) free(VEC)
struct int_list;
extern void dump_sbitmap PARAMS ((FILE *, sbitmap));
extern void dump_sbitmap_vector PARAMS ((FILE *, const char *,
const char *, sbitmap *,
int));
extern sbitmap sbitmap_alloc PARAMS ((unsigned int));
extern sbitmap *sbitmap_vector_alloc PARAMS ((unsigned int, unsigned int));
extern void sbitmap_copy PARAMS ((sbitmap, sbitmap));
extern void sbitmap_zero PARAMS ((sbitmap));
extern void sbitmap_ones PARAMS ((sbitmap));
extern void sbitmap_vector_zero PARAMS ((sbitmap *, unsigned int));
extern void sbitmap_vector_ones PARAMS ((sbitmap *, unsigned int));
extern int sbitmap_union_of_diff PARAMS ((sbitmap, sbitmap, sbitmap,
sbitmap));
extern void sbitmap_difference PARAMS ((sbitmap, sbitmap, sbitmap));
extern void sbitmap_not PARAMS ((sbitmap, sbitmap));
extern int sbitmap_a_or_b_and_c PARAMS ((sbitmap, sbitmap, sbitmap,
sbitmap));
extern int sbitmap_a_and_b_or_c PARAMS ((sbitmap, sbitmap, sbitmap,
sbitmap));
extern int sbitmap_a_and_b PARAMS ((sbitmap, sbitmap, sbitmap));
extern int sbitmap_a_or_b PARAMS ((sbitmap, sbitmap, sbitmap));
extern int sbitmap_a_subset_b_p PARAMS ((sbitmap, sbitmap));
extern int sbitmap_first_set_bit PARAMS ((sbitmap));
extern int sbitmap_last_set_bit PARAMS ((sbitmap));
extern void sbitmap_intersect_of_predsucc PARAMS ((sbitmap, sbitmap *,
int, struct int_list **));
#define sbitmap_intersect_of_predecessors sbitmap_intersect_of_predsucc
#define sbitmap_intersect_of_successors sbitmap_intersect_of_predsucc
extern void sbitmap_union_of_predsucc PARAMS ((sbitmap, sbitmap *, int,
struct int_list **));
#define sbitmap_union_of_predecessors sbitmap_union_of_predsucc
#define sbitmap_union_of_successors sbitmap_union_of_predsucc
/* Intersection and Union of preds/succs using the new flow graph
structure instead of the pred/succ arrays. */
extern void sbitmap_intersection_of_succs PARAMS ((sbitmap, sbitmap *, int));
extern void sbitmap_intersection_of_preds PARAMS ((sbitmap, sbitmap *, int));
extern void sbitmap_union_of_succs PARAMS ((sbitmap, sbitmap *, int));
extern void sbitmap_union_of_preds PARAMS ((sbitmap, sbitmap *, int));
extern void debug_sbitmap PARAMS ((sbitmap));
#endif /* ! GCC_SBITMAP_H */
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