/* Simple bitmaps. Copyright (C) 1999, 2000, 2002, 2003, 2004, 2006, 2007 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 3, or (at your option) any later version. GCC 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 GCC; see the file COPYING3. If not see . */ #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_WIDEST_FAST_INT) #define SBITMAP_ELT_TYPE unsigned HOST_WIDEST_FAST_INT /* 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 typedef struct simple_bitmap_def { unsigned char *popcount; /* Population count. */ unsigned int n_bits; /* Number of bits. */ unsigned int size; /* Size in elements. */ SBITMAP_ELT_TYPE elms[1]; /* The elements. */ } *sbitmap; typedef const struct simple_bitmap_def *const_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) #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) /* Set bit number BITNO in the sbitmap MAP. Updates population count if this bitmap has one. */ 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 { \ unsigned int word_num_; \ unsigned int bit_num_; \ unsigned int size_ = (SBITMAP)->size; \ SBITMAP_ELT_TYPE *ptr_ = (SBITMAP)->elms; \ \ for (word_num_ = size_; word_num_ > 0; word_num_--) \ { \ SBITMAP_ELT_TYPE word_ = ptr_[word_num_ - 1]; \ \ if (word_ != 0) \ for (bit_num_ = SBITMAP_ELT_BITS; bit_num_ > 0; bit_num_--) \ { \ SBITMAP_ELT_TYPE _mask = (SBITMAP_ELT_TYPE)1 << (bit_num_ - 1);\ \ if ((word_ & _mask) != 0) \ { \ word_ &= ~ _mask; \ (N) = (word_num_ - 1) * SBITMAP_ELT_BITS + bit_num_ - 1;\ CODE; \ if (word_ == 0) \ break; \ } \ } \ } \ } while (0) #define sbitmap_free(MAP) (free((MAP)->popcount), free((MAP))) #define sbitmap_vector_free(VEC) free(VEC) struct int_list; 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, 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 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, 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 **); #define sbitmap_intersect_of_predecessors sbitmap_intersect_of_predsucc #define sbitmap_intersect_of_successors sbitmap_intersect_of_predsucc extern void sbitmap_union_of_predsucc (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 (sbitmap, sbitmap *, int); extern void sbitmap_intersection_of_preds (sbitmap, sbitmap *, int); extern void sbitmap_union_of_succs (sbitmap, sbitmap *, int); extern void sbitmap_union_of_preds (sbitmap, sbitmap *, int); 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 */