gcc/sbitmap.h

   1 /* Simple bitmaps.
   2    Copyright (C) 1999, 2000, 2002, 2003, 2004 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_ = (MIN) / (unsigned int) SBITMAP_ELT_BITS;     \
  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   SBITMAP_ELT_TYPE word_ = ptr_[word_num_] >> bit_num_;                 \
  66                                                                         \
  67   for (;                                                                \
  68        word_num_ < size_;                                               \
  69        word_num_++, bit_num_ = 0, word_ = ptr_[word_num_])              \
  70     {                                                                   \
  71       for (; word_ != 0; word_ >>= 1, bit_num_++)                       \
  72         {                                                               \
  73           if ((word_ & 1) != 0)                                         \
  74             {                                                           \
  75               (N) = word_num_ * SBITMAP_ELT_BITS + bit_num_;            \
  76               CODE;                                                     \
  77             }                                                           \
  78         }                                                               \
  79     }                                                                   \
  80 } while (0)
  81
  82 #define EXECUTE_IF_SET_IN_SBITMAP_REV(SBITMAP, N, CODE)                 \
  83 do {                                                                    \
  84   unsigned int word_num_;                                               \
  85   unsigned int bit_num_;                                                \
  86   unsigned int size_ = (SBITMAP)->size;                                 \
  87   SBITMAP_ELT_TYPE *ptr_ = (SBITMAP)->elms;                             \
  88                                                                         \
  89   for (word_num_ = size_; word_num_ > 0; word_num_--)                   \
  90     {                                                                   \
  91       SBITMAP_ELT_TYPE word_ = ptr_[word_num_ - 1];                     \
  92                                                                         \
  93       if (word_ != 0)                                                   \
  94         for (bit_num_ = SBITMAP_ELT_BITS; bit_num_ > 0; bit_num_--)     \
  95           {                                                             \
  96             SBITMAP_ELT_TYPE _mask = (SBITMAP_ELT_TYPE)1 << (bit_num_ - 1);\
  97                                                                         \
  98             if ((word_ & _mask) != 0)                                   \
  99               {                                                         \
 100                 word_ &= ~ _mask;                                       \
 101                 (N) = (word_num_ - 1) * SBITMAP_ELT_BITS + bit_num_ - 1;\
 102                 CODE;                                                   \
 103                 if (word_ == 0)                                         \
 104                   break;                                                \
 105               }                                                         \
 106           }                                                             \
 107     }                                                                   \
 108 } while (0)
 109
 110 #define sbitmap_free(MAP)               free(MAP)
 111 #define sbitmap_vector_free(VEC)        free(VEC)
 112
 113 struct int_list;
 114
 115 extern void dump_sbitmap (FILE *, sbitmap);
 116 extern void dump_sbitmap_file (FILE *, sbitmap);
 117 extern void dump_sbitmap_vector (FILE *, const char *, const char *, sbitmap *,
 118                                  int);
 119 extern sbitmap sbitmap_alloc (unsigned int);
 120 extern sbitmap *sbitmap_vector_alloc (unsigned int, unsigned int);
 121 extern sbitmap sbitmap_resize (sbitmap, unsigned int, int);
 122 extern void sbitmap_copy (sbitmap, sbitmap);
 123 extern int sbitmap_equal (sbitmap, sbitmap);
 124 extern void sbitmap_zero (sbitmap);
 125 extern void sbitmap_ones (sbitmap);
 126 extern void sbitmap_vector_zero (sbitmap *, unsigned int);
 127 extern void sbitmap_vector_ones (sbitmap *, unsigned int);
 128
 129 extern void sbitmap_union_of_diff (sbitmap, sbitmap, sbitmap, sbitmap);
 130 extern bool sbitmap_union_of_diff_cg (sbitmap, sbitmap, sbitmap, sbitmap);
 131 extern void sbitmap_difference (sbitmap, sbitmap, sbitmap);
 132 extern void sbitmap_not (sbitmap, sbitmap);
 133 extern void sbitmap_a_or_b_and_c (sbitmap, sbitmap, sbitmap, sbitmap);
 134 extern bool sbitmap_a_or_b_and_c_cg (sbitmap, sbitmap, sbitmap, sbitmap);
 135 extern void sbitmap_a_and_b_or_c (sbitmap, sbitmap, sbitmap, sbitmap);
 136 extern bool sbitmap_a_and_b_or_c_cg (sbitmap, sbitmap, sbitmap, sbitmap);
 137 extern void sbitmap_a_and_b (sbitmap, sbitmap, sbitmap);
 138 extern bool sbitmap_a_and_b_cg (sbitmap, sbitmap, sbitmap);
 139 extern void sbitmap_a_or_b (sbitmap, sbitmap, sbitmap);
 140 extern bool sbitmap_a_or_b_cg (sbitmap, sbitmap, sbitmap);
 141 extern void sbitmap_a_xor_b (sbitmap, sbitmap, sbitmap);
 142 extern bool sbitmap_a_xor_b_cg (sbitmap, sbitmap, sbitmap);
 143 extern bool sbitmap_a_subset_b_p (sbitmap, sbitmap);
 144
 145 extern int sbitmap_first_set_bit (sbitmap);
 146 extern int sbitmap_last_set_bit (sbitmap);
 147
 148 extern void sbitmap_intersect_of_predsucc (sbitmap, sbitmap *, int,
 149                                            struct int_list **);
 150 #define sbitmap_intersect_of_predecessors  sbitmap_intersect_of_predsucc
 151 #define sbitmap_intersect_of_successors    sbitmap_intersect_of_predsucc
 152
 153 extern void sbitmap_union_of_predsucc (sbitmap, sbitmap *, int,
 154                                        struct int_list **);
 155 #define sbitmap_union_of_predecessors  sbitmap_union_of_predsucc
 156 #define sbitmap_union_of_successors    sbitmap_union_of_predsucc
 157
 158 /* Intersection and Union of preds/succs using the new flow graph
 159    structure instead of the pred/succ arrays.  */
 160
 161 extern void sbitmap_intersection_of_succs (sbitmap, sbitmap *, int);
 162 extern void sbitmap_intersection_of_preds (sbitmap, sbitmap *, int);
 163 extern void sbitmap_union_of_succs (sbitmap, sbitmap *, int);
 164 extern void sbitmap_union_of_preds (sbitmap, sbitmap *, int);
 165
 166 extern void debug_sbitmap (sbitmap);
 167 extern sbitmap sbitmap_realloc (sbitmap, unsigned int);
 168 #endif /* ! GCC_SBITMAP_H */