gcc/sbitmap.h

   1 /* Simple bitmaps.
   2    Copyright (C) 1999, 2000, 2002, 2003 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 2, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING.  If not, write to the Free
  18 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  19 02111-1307, USA.  */
  20
  21 #ifndef GCC_SBITMAP_H
  22 #define GCC_SBITMAP_H
  23
  24 /* It's not clear yet whether using bitmap.[ch] will be a win.
  25    It should be straightforward to convert so for now we keep things simple
  26    while more important issues are dealt with.  */
  27
  28 #define SBITMAP_ELT_BITS ((unsigned) HOST_BITS_PER_WIDEST_FAST_INT)
  29 #define SBITMAP_ELT_TYPE unsigned HOST_WIDEST_FAST_INT
  30
  31 typedef struct simple_bitmap_def
  32 {
  33   unsigned int n_bits;          /* Number of bits.  */
  34   unsigned int size;            /* Size in elements.  */
  35   unsigned int bytes;           /* Size in bytes.  */
  36   SBITMAP_ELT_TYPE elms[1];     /* The elements.  */
  37 } *sbitmap;
  38
  39 typedef SBITMAP_ELT_TYPE *sbitmap_ptr;
  40
  41 /* Return the set size needed for N elements.  */
  42 #define SBITMAP_SET_SIZE(N) (((N) + SBITMAP_ELT_BITS - 1) / SBITMAP_ELT_BITS)
  43
  44 /* Set bit number bitno in the bitmap.  */
  45 #define SET_BIT(BITMAP, BITNO)                                  \
  46   ((BITMAP)->elms [(BITNO) / SBITMAP_ELT_BITS]                  \
  47    |= (SBITMAP_ELT_TYPE) 1 << (BITNO) % SBITMAP_ELT_BITS)
  48
  49 /* Test if bit number bitno in the bitmap is set.  */
  50 #define TEST_BIT(BITMAP, BITNO) \
  51 ((BITMAP)->elms [(BITNO) / SBITMAP_ELT_BITS] >> (BITNO) % SBITMAP_ELT_BITS & 1)
  52
  53 /* Reset bit number bitno in the bitmap.  */
  54 #define RESET_BIT(BITMAP, BITNO)                                \
  55   ((BITMAP)->elms [(BITNO) / SBITMAP_ELT_BITS]                  \
  56    &= ~((SBITMAP_ELT_TYPE) 1 << (BITNO) % SBITMAP_ELT_BITS))
  57
  58 /* Loop over all elements of SBITSET, starting with MIN.  */
  59 #define EXECUTE_IF_SET_IN_SBITMAP(SBITMAP, MIN, N, CODE)                \
  60 do {                                                                    \
  61   unsigned int word_num_;                                               \
  62   unsigned int bit_num_ = (MIN) % (unsigned int) SBITMAP_ELT_BITS;      \
  63   unsigned int size_ = (SBITMAP)->size;                                 \
  64   SBITMAP_ELT_TYPE *ptr_ = (SBITMAP)->elms;                             \
  65                                                                         \
  66   for (word_num_ = (MIN) / (unsigned int) SBITMAP_ELT_BITS;             \
  67        word_num_ < size_; word_num_++, bit_num_ = 0)                    \
  68     {                                                                   \
  69       SBITMAP_ELT_TYPE word_ = ptr_[word_num_];                         \
  70                                                                         \
  71       if (word_ != 0)                                                   \
  72         for (; bit_num_ < SBITMAP_ELT_BITS; bit_num_++)                 \
  73           {                                                             \
  74             SBITMAP_ELT_TYPE _mask = (SBITMAP_ELT_TYPE) 1 << bit_num_;  \
  75                                                                         \
  76             if ((word_ & _mask) != 0)                                   \
  77               {                                                         \
  78                 word_ &= ~ _mask;                                       \
  79                 (N) = word_num_ * SBITMAP_ELT_BITS + bit_num_;          \
  80                 CODE;                                                   \
  81                 if (word_ == 0)                                         \
  82                   break;                                                \
  83               }                                                         \
  84           }                                                             \
  85     }                                                                   \
  86 } while (0)
  87
  88 #define EXECUTE_IF_SET_IN_SBITMAP_REV(SBITMAP, N, CODE)                 \
  89 do {                                                                    \
  90   unsigned int word_num_;                                               \
  91   unsigned int bit_num_;                                                \
  92   unsigned int size_ = (SBITMAP)->size;                                 \
  93   SBITMAP_ELT_TYPE *ptr_ = (SBITMAP)->elms;                             \
  94                                                                         \
  95   for (word_num_ = size_; word_num_ > 0; word_num_--)                   \
  96     {                                                                   \
  97       SBITMAP_ELT_TYPE word_ = ptr_[word_num_ - 1];                     \
  98                                                                         \
  99       if (word_ != 0)                                                   \
 100         for (bit_num_ = SBITMAP_ELT_BITS; bit_num_ > 0; bit_num_--)     \
 101           {                                                             \
 102             SBITMAP_ELT_TYPE _mask = (SBITMAP_ELT_TYPE)1 << (bit_num_ - 1);\
 103                                                                         \
 104             if ((word_ & _mask) != 0)                                   \
 105               {                                                         \
 106                 word_ &= ~ _mask;                                       \
 107                 (N) = (word_num_ - 1) * SBITMAP_ELT_BITS + bit_num_ - 1;\
 108                 CODE;                                                   \
 109                 if (word_ == 0)                                         \
 110                   break;                                                \
 111               }                                                         \
 112           }                                                             \
 113     }                                                                   \
 114 } while (0)
 115
 116 #define sbitmap_free(MAP)               free(MAP)
 117 #define sbitmap_vector_free(VEC)        free(VEC)
 118
 119 struct int_list;
 120
 121 extern void dump_sbitmap (FILE *, sbitmap);
 122 extern void dump_sbitmap_file (FILE *, sbitmap);
 123 extern void dump_sbitmap_vector (FILE *, const char *, const char *, sbitmap *,
 124                                  int);
 125 extern sbitmap sbitmap_alloc (unsigned int);
 126 extern sbitmap *sbitmap_vector_alloc (unsigned int, unsigned int);
 127 extern sbitmap sbitmap_resize (sbitmap, unsigned int, int);
 128 extern void sbitmap_copy (sbitmap, sbitmap);
 129 extern int sbitmap_equal (sbitmap, sbitmap);
 130 extern void sbitmap_zero (sbitmap);
 131 extern void sbitmap_ones (sbitmap);
 132 extern void sbitmap_vector_zero (sbitmap *, unsigned int);
 133 extern void sbitmap_vector_ones (sbitmap *, unsigned int);
 134
 135 extern void sbitmap_union_of_diff (sbitmap, sbitmap, sbitmap, sbitmap);
 136 extern bool sbitmap_union_of_diff_cg (sbitmap, sbitmap, sbitmap, sbitmap);
 137 extern void sbitmap_difference (sbitmap, sbitmap, sbitmap);
 138 extern void sbitmap_not (sbitmap, sbitmap);
 139 extern void sbitmap_a_or_b_and_c (sbitmap, sbitmap, sbitmap, sbitmap);
 140 extern bool sbitmap_a_or_b_and_c_cg (sbitmap, sbitmap, sbitmap, sbitmap);
 141 extern void sbitmap_a_and_b_or_c (sbitmap, sbitmap, sbitmap, sbitmap);
 142 extern bool sbitmap_a_and_b_or_c_cg (sbitmap, sbitmap, sbitmap, sbitmap);
 143 extern void sbitmap_a_and_b (sbitmap, sbitmap, sbitmap);
 144 extern bool sbitmap_a_and_b_cg (sbitmap, sbitmap, sbitmap);
 145 extern void sbitmap_a_or_b (sbitmap, sbitmap, sbitmap);
 146 extern bool sbitmap_a_or_b_cg (sbitmap, sbitmap, sbitmap);
 147 extern void sbitmap_a_xor_b (sbitmap, sbitmap, sbitmap);
 148 extern bool sbitmap_a_xor_b_cg (sbitmap, sbitmap, sbitmap);
 149 extern bool sbitmap_a_subset_b_p (sbitmap, sbitmap);
 150
 151 extern int sbitmap_first_set_bit (sbitmap);
 152 extern int sbitmap_last_set_bit (sbitmap);
 153
 154 extern void sbitmap_intersect_of_predsucc (sbitmap, sbitmap *, int,
 155                                            struct int_list **);
 156 #define sbitmap_intersect_of_predecessors  sbitmap_intersect_of_predsucc
 157 #define sbitmap_intersect_of_successors    sbitmap_intersect_of_predsucc
 158
 159 extern void sbitmap_union_of_predsucc (sbitmap, sbitmap *, int,
 160                                        struct int_list **);
 161 #define sbitmap_union_of_predecessors  sbitmap_union_of_predsucc
 162 #define sbitmap_union_of_successors    sbitmap_union_of_predsucc
 163
 164 /* Intersection and Union of preds/succs using the new flow graph
 165    structure instead of the pred/succ arrays.  */
 166
 167 extern void sbitmap_intersection_of_succs (sbitmap, sbitmap *, int);
 168 extern void sbitmap_intersection_of_preds (sbitmap, sbitmap *, int);
 169 extern void sbitmap_union_of_succs (sbitmap, sbitmap *, int);
 170 extern void sbitmap_union_of_preds (sbitmap, sbitmap *, int);
 171
 172 extern void debug_sbitmap (sbitmap);
 173 extern sbitmap sbitmap_realloc (sbitmap, unsigned int);
 174 #endif /* ! GCC_SBITMAP_H */