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/* Simple bitmaps.
Copyright (C) 1999 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. */
/* 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 HOST_BITS_PER_WIDE_INT
#define SBITMAP_ELT_TYPE unsigned HOST_WIDE_INT
typedef struct simple_bitmap_def {
/* Number of bits. */
int n_bits;
/* Size in elements. */
int size;
/* Size in bytes. */
int bytes;
/* The elements. */
SBITMAP_ELT_TYPE elms[1];
} *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 bit_num_ = (MIN) % (unsigned) SBITMAP_ELT_BITS; \
unsigned int word_num_ = (MIN) / (unsigned) SBITMAP_ELT_BITS; \
unsigned int size_ = (SBITMAP)->size; \
SBITMAP_ELT_TYPE *ptr_ = (SBITMAP)->elms; \
\
while (word_num_ < size_) \
{ \
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; \
} \
} \
} \
bit_num_ = 0; \
word_num_++; \
} \
} while (0)
#define sbitmap_free(map) free(map)
#define sbitmap_vector_free(vec) free(vec)
extern void dump_sbitmap PROTO ((FILE *, sbitmap));
extern void dump_sbitmap_vector PROTO ((FILE *, const char *, const char *,
sbitmap *, int));
extern sbitmap sbitmap_alloc PROTO ((int));
extern sbitmap *sbitmap_vector_alloc PROTO ((int, int));
extern void sbitmap_copy PROTO ((sbitmap, sbitmap));
extern void sbitmap_zero PROTO ((sbitmap));
extern void sbitmap_ones PROTO ((sbitmap));
extern void sbitmap_vector_zero PROTO ((sbitmap *, int));
extern void sbitmap_vector_ones PROTO ((sbitmap *, int));
extern int sbitmap_union_of_diff PROTO ((sbitmap, sbitmap, sbitmap, sbitmap));
extern void sbitmap_difference PROTO ((sbitmap, sbitmap, sbitmap));
extern void sbitmap_not PROTO ((sbitmap, sbitmap));
extern int sbitmap_a_or_b_and_c PROTO ((sbitmap, sbitmap, sbitmap, sbitmap));
extern int sbitmap_a_and_b_or_c PROTO ((sbitmap, sbitmap, sbitmap, sbitmap));
extern int sbitmap_a_and_b PROTO ((sbitmap, sbitmap, sbitmap));
extern int sbitmap_a_or_b PROTO ((sbitmap, sbitmap, sbitmap));
struct int_list;
extern void sbitmap_intersect_of_predsucc PROTO ((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 PROTO ((sbitmap, sbitmap *, int,
struct int_list **));
#define sbitmap_union_of_predecessors sbitmap_union_of_predsucc
#define sbitmap_union_of_successors sbitmap_union_of_predsucc
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