/* Functions to support general ended bitmaps.
- Copyright (C) 1997 Free Software Foundation, Inc.
+ Copyright (C) 1997, 1998, 1999, 2000, 2001, 2003, 2004
+ Free Software Foundation, Inc.
-This file is part of GNU CC.
+This file is part of GCC.
-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.
+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 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.
+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 GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+along with GCC; see the file COPYING. If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA. */
-#include <stdio.h>
#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
#include "rtl.h"
#include "flags.h"
#include "obstack.h"
-#include "regs.h"
-#include "basic-block.h"
-
-/* The contents of the current function definition are allocated
- in this obstack, and all are freed at the end of the function.
- For top-level functions, this is temporary_obstack.
- Separate obstacks are made for nested functions. */
-
-extern struct obstack *function_obstack;
+#include "ggc.h"
+#include "bitmap.h"
+/* Obstack to allocate bitmap elements from. */
+static struct obstack bitmap_obstack;
+static int bitmap_obstack_init = FALSE;
\f
#ifndef INLINE
#ifndef __GNUC__
#endif
/* Global data */
-bitmap_element bitmap_zero; /* An element of all zero bits. */
-bitmap_element *bitmap_free; /* Freelist of bitmap elements. */
-
-static void bitmap_element_free PROTO((bitmap, bitmap_element *));
-static bitmap_element *bitmap_element_allocate PROTO((bitmap));
-static int bitmap_element_zerop PROTO((bitmap_element *));
-static void bitmap_element_link PROTO((bitmap, bitmap_element *));
-static bitmap_element *bitmap_find_bit PROTO((bitmap, unsigned int));
+bitmap_element bitmap_zero_bits; /* An element of all zero bits. */
+static bitmap_element *bitmap_free; /* Freelist of bitmap elements. */
+static GTY((deletable)) bitmap_element *bitmap_ggc_free;
+
+static void bitmap_elem_to_freelist (bitmap, bitmap_element *);
+static void bitmap_element_free (bitmap, bitmap_element *);
+static bitmap_element *bitmap_element_allocate (bitmap);
+static int bitmap_element_zerop (bitmap_element *);
+static void bitmap_element_link (bitmap, bitmap_element *);
+static bitmap_element *bitmap_elt_insert_after (bitmap, bitmap_element *);
+static void bitmap_elt_clear_from (bitmap, bitmap_element *);
+static bitmap_element *bitmap_find_bit (bitmap, unsigned int);
\f
-/* Free a bitmap element */
+
+/* Add ELEM to the appropriate freelist. */
+static INLINE void
+bitmap_elem_to_freelist (bitmap head, bitmap_element *elt)
+{
+ if (head->using_obstack)
+ {
+ elt->next = bitmap_free;
+ bitmap_free = elt;
+ }
+ else
+ {
+ elt->next = bitmap_ggc_free;
+ bitmap_ggc_free = elt;
+ }
+}
+
+/* Free a bitmap element. Since these are allocated off the
+ bitmap_obstack, "free" actually means "put onto the freelist". */
static INLINE void
-bitmap_element_free (head, elt)
- bitmap head;
- bitmap_element *elt;
+bitmap_element_free (bitmap head, bitmap_element *elt)
{
bitmap_element *next = elt->next;
bitmap_element *prev = elt->prev;
/* Since the first thing we try is to insert before current,
make current the next entry in preference to the previous. */
if (head->current == elt)
- head->current = next != 0 ? next : prev;
-
- elt->next = bitmap_free;
- bitmap_free = elt;
+ {
+ head->current = next != 0 ? next : prev;
+ if (head->current)
+ head->indx = head->current->indx;
+ }
+ bitmap_elem_to_freelist (head, elt);
}
\f
/* Allocate a bitmap element. The bits are cleared, but nothing else is. */
static INLINE bitmap_element *
-bitmap_element_allocate (head)
- bitmap head;
+bitmap_element_allocate (bitmap head)
{
bitmap_element *element;
- int i;
- if (bitmap_free != 0)
+ if (head->using_obstack)
{
- element = bitmap_free;
- bitmap_free = element->next;
+ if (bitmap_free != 0)
+ {
+ element = bitmap_free;
+ bitmap_free = element->next;
+ }
+ else
+ {
+ /* We can't use gcc_obstack_init to initialize the obstack since
+ print-rtl.c now calls bitmap functions, and bitmap is linked
+ into the gen* functions. */
+ if (!bitmap_obstack_init)
+ {
+ bitmap_obstack_init = TRUE;
+
+#if !defined(__GNUC__) || (__GNUC__ < 2)
+#define __alignof__(type) 0
+#endif
+
+ obstack_specify_allocation (&bitmap_obstack, OBSTACK_CHUNK_SIZE,
+ __alignof__ (bitmap_element),
+ obstack_chunk_alloc,
+ obstack_chunk_free);
+ }
+
+ element = XOBNEW (&bitmap_obstack, bitmap_element);
+ }
}
else
- element = (bitmap_element *) obstack_alloc (function_obstack,
- sizeof (bitmap_element));
+ {
+ if (bitmap_ggc_free != NULL)
+ {
+ element = bitmap_ggc_free;
+ bitmap_ggc_free = element->next;
+ }
+ else
+ element = GGC_NEW (bitmap_element);
+ }
-#if BITMAP_ELEMENT_WORDS == 2
- element->bits[0] = element->bits[1] = 0;
-#else
- for (i = 0; i < BITMAP_ELEMENT_WORDS; i++)
- element->bits[i] = 0;
-#endif
+ memset (element->bits, 0, sizeof (element->bits));
return element;
}
+/* Release any memory allocated by bitmaps. */
+
+void
+bitmap_release_memory (void)
+{
+ bitmap_free = 0;
+ if (bitmap_obstack_init)
+ {
+ bitmap_obstack_init = FALSE;
+ obstack_free (&bitmap_obstack, NULL);
+ }
+}
+
/* Return nonzero if all bits in an element are zero. */
static INLINE int
-bitmap_element_zerop (element)
- bitmap_element *element;
+bitmap_element_zerop (bitmap_element *element)
{
#if BITMAP_ELEMENT_WORDS == 2
return (element->bits[0] | element->bits[1]) == 0;
/* Link the bitmap element into the current bitmap linked list. */
static INLINE void
-bitmap_element_link (head, element)
- bitmap head;
- bitmap_element *element;
+bitmap_element_link (bitmap head, bitmap_element *element)
{
unsigned int indx = element->indx;
bitmap_element *ptr;
head->current = element;
head->indx = indx;
}
+
+/* Insert a new uninitialized element into bitmap HEAD after element
+ ELT. If ELT is NULL, insert the element at the start. Return the
+ new element. */
+
+static bitmap_element *
+bitmap_elt_insert_after (bitmap head, bitmap_element *elt)
+{
+ bitmap_element *node = bitmap_element_allocate (head);
+
+ if (!elt)
+ {
+ if (!head->current)
+ head->current = node;
+ node->next = head->first;
+ if (node->next)
+ node->next->prev = node;
+ head->first = node;
+ node->prev = NULL;
+ }
+ else
+ {
+ gcc_assert (head->current);
+ node->next = elt->next;
+ if (node->next)
+ node->next->prev = node;
+ elt->next = node;
+ node->prev = elt;
+ }
+ return node;
+}
+
+/* Remove ELT and all following elements from bitmap HEAD. */
+
+void
+bitmap_elt_clear_from (bitmap head, bitmap_element *elt)
+{
+ bitmap_element *next;
+
+ while (elt)
+ {
+ next = elt->next;
+ bitmap_element_free (head, elt);
+ elt = next;
+ }
+}
+
\f
/* Clear a bitmap by freeing the linked list. */
-void INLINE
-bitmap_clear (head)
- bitmap head;
+INLINE void
+bitmap_clear (bitmap head)
{
bitmap_element *element, *next;
for (element = head->first; element != 0; element = next)
{
next = element->next;
- element->next = bitmap_free;
- bitmap_free = element;
+ bitmap_elem_to_freelist (head, element);
}
- head->first = head->current = 0;
+ head->first = head->current = 0;
}
\f
-/* Copy a bitmap to another bitmap */
+/* Copy a bitmap to another bitmap. */
void
-bitmap_copy (to, from)
- bitmap to;
- bitmap from;
+bitmap_copy (bitmap to, bitmap from)
{
bitmap_element *from_ptr, *to_ptr = 0;
+#if BITMAP_ELEMENT_WORDS != 2
int i;
+#endif
bitmap_clear (to);
- /* Copy elements in forward direction one at a time */
+ /* Copy elements in forward direction one at a time. */
for (from_ptr = from->first; from_ptr; from_ptr = from_ptr->next)
{
bitmap_element *to_elt = bitmap_element_allocate (to);
faster. */
static INLINE bitmap_element *
-bitmap_find_bit (head, bit)
- bitmap head;
- unsigned int bit;
+bitmap_find_bit (bitmap head, unsigned int bit)
{
bitmap_element *element;
- unsigned HOST_WIDE_INT indx = bit / BITMAP_ELEMENT_ALL_BITS;
+ unsigned int indx = bit / BITMAP_ELEMENT_ALL_BITS;
- if (head->current == 0)
- return 0;
+ if (head->current == 0
+ || head->indx == indx)
+ return head->current;
if (head->indx > indx)
for (element = head->current;
/* Clear a single bit in a bitmap. */
void
-bitmap_clear_bit (head, bit)
- bitmap head;
- int bit;
+bitmap_clear_bit (bitmap head, int bit)
{
bitmap_element *ptr = bitmap_find_bit (head, bit);
if (ptr != 0)
{
- unsigned bit_num = bit % (unsigned) HOST_BITS_PER_WIDE_INT;
- unsigned word_num = ((bit / (unsigned) HOST_BITS_PER_WIDE_INT)
- % BITMAP_ELEMENT_WORDS);
- ptr->bits[word_num] &= ~ (((unsigned HOST_WIDE_INT) 1) << bit_num);
+ unsigned bit_num = bit % BITMAP_WORD_BITS;
+ unsigned word_num = bit / BITMAP_WORD_BITS % BITMAP_ELEMENT_WORDS;
+ ptr->bits[word_num] &= ~ (((BITMAP_WORD) 1) << bit_num);
- /* If we cleared the entire word, free up the element */
+ /* If we cleared the entire word, free up the element. */
if (bitmap_element_zerop (ptr))
bitmap_element_free (head, ptr);
}
}
-\f
/* Set a single bit in a bitmap. */
void
-bitmap_set_bit (head, bit)
- bitmap head;
- int bit;
+bitmap_set_bit (bitmap head, int bit)
{
bitmap_element *ptr = bitmap_find_bit (head, bit);
- unsigned word_num
- = ((bit / (unsigned) HOST_BITS_PER_WIDE_INT) % BITMAP_ELEMENT_WORDS);
- unsigned bit_num = bit % (unsigned) HOST_BITS_PER_WIDE_INT;
- unsigned HOST_WIDE_INT bit_val = ((unsigned HOST_WIDE_INT) 1) << bit_num;
+ unsigned word_num = bit / BITMAP_WORD_BITS % BITMAP_ELEMENT_WORDS;
+ unsigned bit_num = bit % BITMAP_WORD_BITS;
+ BITMAP_WORD bit_val = ((BITMAP_WORD) 1) << bit_num;
if (ptr == 0)
{
else
ptr->bits[word_num] |= bit_val;
}
-\f
+
/* Return whether a bit is set within a bitmap. */
int
-bitmap_bit_p (head, bit)
- bitmap head;
- int bit;
+bitmap_bit_p (bitmap head, int bit)
{
bitmap_element *ptr;
unsigned bit_num;
if (ptr == 0)
return 0;
- bit_num = bit % (unsigned) HOST_BITS_PER_WIDE_INT;
- word_num
- = ((bit / (unsigned) HOST_BITS_PER_WIDE_INT) % BITMAP_ELEMENT_WORDS);
+ bit_num = bit % BITMAP_WORD_BITS;
+ word_num = bit / BITMAP_WORD_BITS % BITMAP_ELEMENT_WORDS;
+
+ return (ptr->bits[word_num] >> bit_num) & 1;
+}
+\f
+/* Return the bit number of the first set bit in the bitmap, or -1
+ if the bitmap is empty. */
+
+int
+bitmap_first_set_bit (bitmap a)
+{
+ bitmap_element *ptr = a->first;
+ BITMAP_WORD word;
+ unsigned word_num, bit_num;
+
+ if (ptr == NULL)
+ return -1;
+
+#if BITMAP_ELEMENT_WORDS == 2
+ word_num = 0, word = ptr->bits[0];
+ if (word == 0)
+ word_num = 1, word = ptr->bits[1];
+#else
+ for (word_num = 0; word_num < BITMAP_ELEMENT_WORDS; ++word_num)
+ if ((word = ptr->bits[word_num]) != 0)
+ goto word_found;
+ gcc_unreachable ();
+ word_found:
+#endif
+
+ /* Binary search for the first set bit. */
+ /* ??? It'd be nice to know if ffs or ffsl was available. */
+
+ bit_num = 0;
+ word = word & -word;
- return
- (ptr->bits[word_num] & (((unsigned HOST_WIDE_INT) 1) << bit_num)) != 0;
+#if nBITMAP_WORD_BITS > 64
+ #error "Fill out the table."
+#endif
+#if nBITMAP_WORD_BITS > 32
+ if ((word & 0xffffffff) == 0)
+ word >>= 32, bit_num += 32;
+#endif
+ if ((word & 0xffff) == 0)
+ word >>= 16, bit_num += 16;
+ if ((word & 0xff) == 0)
+ word >>= 8, bit_num += 8;
+ if (word & 0xf0)
+ bit_num += 4;
+ if (word & 0xcc)
+ bit_num += 2;
+ if (word & 0xaa)
+ bit_num += 1;
+
+ return (ptr->indx * BITMAP_ELEMENT_ALL_BITS
+ + word_num * BITMAP_WORD_BITS
+ + bit_num);
+}
+
+/* Return the bit number of the last set bit in the bitmap, or -1
+ if the bitmap is empty. */
+
+int
+bitmap_last_set_bit (bitmap a)
+{
+ bitmap_element *ptr = a->first;
+ BITMAP_WORD word;
+ unsigned word_num, bit_num;
+
+ if (ptr == NULL)
+ return -1;
+
+ while (ptr->next != NULL)
+ ptr = ptr->next;
+
+#if BITMAP_ELEMENT_WORDS == 2
+ word_num = 1, word = ptr->bits[1];
+ if (word == 0)
+ word_num = 0, word = ptr->bits[0];
+#else
+ for (word_num = BITMAP_ELEMENT_WORDS; word_num-- > 0; )
+ if ((word = ptr->bits[word_num]) != 0)
+ goto word_found;
+ gcc_unreachable ();
+ word_found:
+#endif
+
+ /* Binary search for the last set bit. */
+
+ bit_num = 0;
+#if nBITMAP_WORD_BITS > 64
+ #error "Fill out the table."
+#endif
+#if nBITMAP_WORD_BITS > 32
+ if (word & ~(BITMAP_WORD)0xffffffff)
+ word >>= 32, bit_num += 32;
+#endif
+ if (word & 0xffff0000)
+ word >>= 16, bit_num += 16;
+ if (word & 0xff00)
+ word >>= 8, bit_num += 8;
+ if (word & 0xf0)
+ word >>= 4, bit_num += 4;
+ if (word & 0xc)
+ word >>= 2, bit_num += 2;
+ if (word & 0x2)
+ bit_num += 1;
+
+ return (ptr->indx * BITMAP_ELEMENT_ALL_BITS
+ + word_num * BITMAP_WORD_BITS
+ + bit_num);
}
\f
-/* Store in bitmap TO the result of combining bitmap FROM1 and
- FROM2 using a specific bit manipulation. */
+
+/* DST = A & B. */
void
-bitmap_operation (to, from1, from2, operation)
- bitmap to;
- bitmap from1;
- bitmap from2;
- enum bitmap_bits operation;
-{
- bitmap_element *delete_list = 0;
- bitmap_element *from1_ptr = from1->first;
- bitmap_element *from2_ptr = from2->first;
- unsigned int indx1
- = (from1_ptr) ? from1_ptr->indx : ~ (unsigned HOST_WIDE_INT) 0;
- unsigned int indx2
- = (from2_ptr) ? from2_ptr->indx : ~ (unsigned HOST_WIDE_INT) 0;
- bitmap_element *to_ptr = 0;
- bitmap_element *from1_tmp;
- bitmap_element *from2_tmp;
- unsigned int indx;
- int i;
+bitmap_and (bitmap dst, bitmap a, bitmap b)
+{
+ bitmap_element *dst_elt = dst->first;
+ bitmap_element *a_elt = a->first;
+ bitmap_element *b_elt = b->first;
+ bitmap_element *dst_prev = NULL;
- /* To simplify things, always create a new list. If the old list was one
- of the inputs, free it later. Otherwise, free it now. */
- if (to == from1 || to == from2)
+ gcc_assert (dst != a && dst != b && a != b);
+ while (a_elt && b_elt)
{
- delete_list = to->first;
- to->first = to->current = 0;
+ if (a_elt->indx < b_elt->indx)
+ a_elt = a_elt->next;
+ else if (b_elt->indx < a_elt->indx)
+ b_elt = b_elt->next;
+ else
+ {
+ /* Matching elts, generate A & B. */
+ unsigned ix;
+ BITMAP_WORD ior = 0;
+
+ if (!dst_elt)
+ dst_elt = bitmap_elt_insert_after (dst, dst_prev);
+
+ dst_elt->indx = a_elt->indx;
+ for (ix = BITMAP_ELEMENT_WORDS; ix--;)
+ {
+ BITMAP_WORD r = a_elt->bits[ix] & b_elt->bits[ix];
+
+ dst_elt->bits[ix] = r;
+ ior |= r;
+ }
+ if (ior)
+ {
+ dst_prev = dst_elt;
+ dst_elt = dst_elt->next;
+ }
+ a_elt = a_elt->next;
+ b_elt = b_elt->next;
+ }
}
- else
- bitmap_clear (to);
+ bitmap_elt_clear_from (dst, dst_elt);
+ gcc_assert (!dst->current == !dst->first);
+ if (dst->current)
+ dst->indx = dst->current->indx;
+}
+
+/* A &= B. */
+
+void
+bitmap_and_into (bitmap a, bitmap b)
+{
+ bitmap_element *a_elt = a->first;
+ bitmap_element *b_elt = b->first;
+ bitmap_element *next;
- while (from1_ptr != 0 || from2_ptr != 0)
+ gcc_assert (a != b);
+ while (a_elt && b_elt)
{
- /* Figure out whether we need to substitute zero elements for
- missing links. */
- if (indx1 == indx2)
+ if (a_elt->indx < b_elt->indx)
{
- indx = indx1;
- from1_tmp = from1_ptr;
- from2_tmp = from2_ptr;
- from1_ptr = from1_ptr->next;
- indx1 = (from1_ptr) ? from1_ptr->indx : ~ (unsigned HOST_WIDE_INT) 0;
- from2_ptr = from2_ptr->next;
- indx2 = (from2_ptr) ? from2_ptr->indx : ~ (unsigned HOST_WIDE_INT) 0;
+ next = a_elt->next;
+ bitmap_element_free (a, a_elt);
+ a_elt = next;
}
- else if (indx1 < indx2)
+ else if (b_elt->indx < a_elt->indx)
+ b_elt = b_elt->next;
+ else
{
- indx = indx1;
- from1_tmp = from1_ptr;
- from2_tmp = &bitmap_zero;
- from1_ptr = from1_ptr->next;
- indx1 = (from1_ptr) ? from1_ptr->indx : ~ (unsigned HOST_WIDE_INT) 0;
+ /* Matching elts, generate A &= B. */
+ unsigned ix;
+ BITMAP_WORD ior = 0;
+
+ for (ix = BITMAP_ELEMENT_WORDS; ix--;)
+ {
+ BITMAP_WORD r = a_elt->bits[ix] & b_elt->bits[ix];
+
+ a_elt->bits[ix] = r;
+ ior |= r;
+ }
+ next = a_elt->next;
+ if (!ior)
+ bitmap_element_free (a, a_elt);
+ a_elt = next;
+ b_elt = b_elt->next;
}
+ }
+ bitmap_elt_clear_from (a, a_elt);
+ gcc_assert (!a->current == !a->first);
+ gcc_assert (!a->current || a->indx == a->current->indx);
+}
+
+/* DST = A & ~B */
+
+void
+bitmap_and_compl (bitmap dst, bitmap a, bitmap b)
+{
+ bitmap_element *dst_elt = dst->first;
+ bitmap_element *a_elt = a->first;
+ bitmap_element *b_elt = b->first;
+ bitmap_element *dst_prev = NULL;
+
+ gcc_assert (dst != a && dst != b && a != b);
+
+ while (a_elt)
+ {
+ if (!b_elt || a_elt->indx < b_elt->indx)
+ {
+ /* Copy a_elt. */
+ if (!dst_elt)
+ dst_elt = bitmap_elt_insert_after (dst, dst_prev);
+
+ dst_elt->indx = a_elt->indx;
+ memcpy (dst_elt->bits, a_elt->bits, sizeof (dst_elt->bits));
+ dst_prev = dst_elt;
+ dst_elt = dst_elt->next;
+ a_elt = a_elt->next;
+ }
+ else if (b_elt->indx < a_elt->indx)
+ b_elt = b_elt->next;
else
{
- indx = indx2;
- from1_tmp = &bitmap_zero;
- from2_tmp = from2_ptr;
- from2_ptr = from2_ptr->next;
- indx2 = (from2_ptr) ? from2_ptr->indx : ~ (unsigned HOST_WIDE_INT) 0;
+ /* Matching elts, generate A & ~B. */
+ unsigned ix;
+ BITMAP_WORD ior = 0;
+
+ if (!dst_elt)
+ dst_elt = bitmap_elt_insert_after (dst, dst_prev);
+
+ dst_elt->indx = a_elt->indx;
+ for (ix = BITMAP_ELEMENT_WORDS; ix--;)
+ {
+ BITMAP_WORD r = a_elt->bits[ix] & ~b_elt->bits[ix];
+
+ dst_elt->bits[ix] = r;
+ ior |= r;
+ }
+ if (ior)
+ {
+ dst_prev = dst_elt;
+ dst_elt = dst_elt->next;
+ }
+ a_elt = a_elt->next;
+ b_elt = b_elt->next;
}
+ }
+ bitmap_elt_clear_from (dst, dst_elt);
+ gcc_assert (!dst->current == !dst->first);
+ if (dst->current)
+ dst->indx = dst->current->indx;
+}
- if (to_ptr == 0)
- to_ptr = bitmap_element_allocate (to);
+/* A &= ~B */
- /* Do the operation, and if any bits are set, link it into the
- linked list. */
- switch (operation)
+void
+bitmap_and_compl_into (bitmap a, bitmap b)
+{
+ bitmap_element *a_elt = a->first;
+ bitmap_element *b_elt = b->first;
+ bitmap_element *next;
+
+ gcc_assert (a != b);
+ while (a_elt && b_elt)
+ {
+ if (a_elt->indx < b_elt->indx)
+ a_elt = a_elt->next;
+ else if (b_elt->indx < a_elt->indx)
+ b_elt = b_elt->next;
+ else
{
- default:
- abort ();
+ /* Matching elts, generate A &= ~B. */
+ unsigned ix;
+ BITMAP_WORD ior = 0;
- case BITMAP_AND:
-#if BITMAP_ELEMENT_WORDS == 2
- to_ptr->bits[0] = from1_tmp->bits[0] & from2_tmp->bits[0];
- to_ptr->bits[1] = from1_tmp->bits[1] & from2_tmp->bits[1];
-#else
- for (i = BITMAP_ELEMENT_WORDS - 1; i >= 0; i--)
- to_ptr->bits[i] = from1_tmp->bits[i] & from2_tmp->bits[i];
-#endif
- break;
+ for (ix = BITMAP_ELEMENT_WORDS; ix--;)
+ {
+ BITMAP_WORD r = a_elt->bits[ix] & ~b_elt->bits[ix];
- case BITMAP_AND_COMPL:
-#if BITMAP_ELEMENT_WORDS == 2
- to_ptr->bits[0] = from1_tmp->bits[0] & ~ from2_tmp->bits[0];
- to_ptr->bits[1] = from1_tmp->bits[1] & ~ from2_tmp->bits[1];
-#else
- for (i = BITMAP_ELEMENT_WORDS - 1; i >= 0; i--)
- to_ptr->bits[i] = from1_tmp->bits[i] & ~ from2_tmp->bits[i];
-#endif
- break;
+ a_elt->bits[ix] = r;
+ ior |= r;
+ }
+ next = a_elt->next;
+ if (!ior)
+ bitmap_element_free (a, a_elt);
+ a_elt = next;
+ b_elt = b_elt->next;
+ }
+ }
+ gcc_assert (!a->current == !a->first);
+ gcc_assert (!a->current || a->indx == a->current->indx);
+}
- case BITMAP_IOR:
-#if BITMAP_ELEMENT_WORDS == 2
- to_ptr->bits[0] = from1_tmp->bits[0] | from2_tmp->bits[0];
- to_ptr->bits[1] = from1_tmp->bits[1] | from2_tmp->bits[1];
-#else
- for (i = BITMAP_ELEMENT_WORDS - 1; i >= 0; i--)
- to_ptr->bits[i] = from1_tmp->bits[i] | from2_tmp->bits[i];
-#endif
- break;
+/* DST = A | B. Return true if DST changes. */
+
+bool
+bitmap_ior (bitmap dst, bitmap a, bitmap b)
+{
+ bitmap_element *dst_elt = dst->first;
+ bitmap_element *a_elt = a->first;
+ bitmap_element *b_elt = b->first;
+ bitmap_element *dst_prev = NULL;
+ bool changed = false;
+
+ gcc_assert (dst != a && dst != b && a != b);
+ while (a_elt || b_elt)
+ {
+ if (a_elt && b_elt && a_elt->indx == b_elt->indx)
+ {
+ /* Matching elts, generate A | B. */
+ unsigned ix;
+
+ if (!changed && dst_elt && dst_elt->indx == a_elt->indx)
+ {
+ for (ix = BITMAP_ELEMENT_WORDS; ix--;)
+ {
+ BITMAP_WORD r = a_elt->bits[ix] | b_elt->bits[ix];
+
+ if (r != dst_elt->bits[ix])
+ {
+ dst_elt->bits[ix] = r;
+ changed = true;
+ }
+ }
+ }
+ else
+ {
+ changed = true;
+ if (!dst_elt)
+ dst_elt = bitmap_elt_insert_after (dst, dst_prev);
+ dst_elt->indx = a_elt->indx;
+ for (ix = BITMAP_ELEMENT_WORDS; ix--;)
+ {
+ BITMAP_WORD r = a_elt->bits[ix] | b_elt->bits[ix];
+
+ dst_elt->bits[ix] = r;
+ }
+ }
+ a_elt = a_elt->next;
+ b_elt = b_elt->next;
+ dst_prev = dst_elt;
+ dst_elt = dst_elt->next;
+ }
+ else
+ {
+ /* Copy a single element. */
+ bitmap_element *src;
+
+ if (!b_elt || (a_elt && a_elt->indx < b_elt->indx))
+ {
+ src = a_elt;
+ a_elt = a_elt->next;
+ }
+ else
+ {
+ src = b_elt;
+ b_elt = b_elt->next;
+ }
+
+ if (!changed && dst_elt && dst_elt->indx == src->indx)
+ {
+ unsigned ix;
+
+ for (ix = BITMAP_ELEMENT_WORDS; ix--;)
+ if (src->bits[ix] != dst_elt->bits[ix])
+ {
+ dst_elt->bits[ix] = src->bits[ix];
+ changed = true;
+ }
+ }
+ else
+ {
+ changed = true;
+ if (!dst_elt)
+ dst_elt = bitmap_elt_insert_after (dst, dst_prev);
+ dst_elt->indx = src->indx;
+ memcpy (dst_elt->bits, src->bits, sizeof (dst_elt->bits));
+ }
+
+ dst_prev = dst_elt;
+ dst_elt = dst_elt->next;
}
+ }
- if (! bitmap_element_zerop (to_ptr))
+ if (dst_elt)
+ {
+ changed = true;
+ bitmap_elt_clear_from (dst, dst_elt);
+ }
+ gcc_assert (!dst->current == !dst->first);
+ if (dst->current)
+ dst->indx = dst->current->indx;
+ return changed;
+}
+
+/* A |= B. Return true if A changes. */
+
+bool
+bitmap_ior_into (bitmap a, bitmap b)
+{
+ bitmap_element *a_elt = a->first;
+ bitmap_element *b_elt = b->first;
+ bitmap_element *a_prev = NULL;
+ bool changed = false;
+
+ gcc_assert (a != b);
+ while (b_elt)
+ {
+ if (!a_elt || b_elt->indx < a_elt->indx)
{
- to_ptr->indx = indx;
- bitmap_element_link (to, to_ptr);
- to_ptr = 0;
+ /* Copy b_elt. */
+ bitmap_element *dst = bitmap_elt_insert_after (a, a_prev);
+
+ dst->indx = b_elt->indx;
+ memcpy (dst->bits, b_elt->bits, sizeof (dst->bits));
+ a_prev = dst;
+ b_elt = b_elt->next;
+ changed = true;
+ }
+ else if (a_elt->indx < b_elt->indx)
+ {
+ a_prev = a_elt;
+ a_elt = a_elt->next;
+ }
+ else
+ {
+ /* Matching elts, generate A |= B. */
+ unsigned ix;
+
+ if (changed)
+ for (ix = BITMAP_ELEMENT_WORDS; ix--;)
+ {
+ BITMAP_WORD r = a_elt->bits[ix] | b_elt->bits[ix];
+
+ a_elt->bits[ix] = r;
+ }
+ else
+ for (ix = BITMAP_ELEMENT_WORDS; ix--;)
+ {
+ BITMAP_WORD r = a_elt->bits[ix] | b_elt->bits[ix];
+
+ if (a_elt->bits[ix] != r)
+ {
+ changed = true;
+ a_elt->bits[ix] = r;
+ }
+ }
+ b_elt = b_elt->next;
+ a_prev = a_elt;
+ a_elt = a_elt->next;
}
}
+ gcc_assert (!a->current == !a->first);
+ if (a->current)
+ a->indx = a->current->indx;
+ return changed;
+}
+
+/* DST = A ^ B */
+
+void
+bitmap_xor (bitmap dst, bitmap a, bitmap b)
+{
+ bitmap_element *dst_elt = dst->first;
+ bitmap_element *a_elt = a->first;
+ bitmap_element *b_elt = b->first;
+ bitmap_element *dst_prev = NULL;
- /* If we have an unallocated element due to the last element being 0,
- release it back to the free pool. Don't bother calling
- bitmap_element_free since it was never linked into a bitmap. */
- if (to_ptr != 0)
+ gcc_assert (dst != a && dst != b && a != b);
+ while (a_elt || b_elt)
{
- to_ptr->next = bitmap_free;
- bitmap_free = to_ptr;
+ if (a_elt && b_elt && a_elt->indx == b_elt->indx)
+ {
+ /* Matching elts, generate A ^ B. */
+ unsigned ix;
+ BITMAP_WORD ior = 0;
+
+ if (!dst_elt)
+ dst_elt = bitmap_elt_insert_after (dst, dst_prev);
+
+ dst_elt->indx = a_elt->indx;
+ for (ix = BITMAP_ELEMENT_WORDS; ix--;)
+ {
+ BITMAP_WORD r = a_elt->bits[ix] ^ b_elt->bits[ix];
+
+ ior |= r;
+ dst_elt->bits[ix] = r;
+ }
+ a_elt = a_elt->next;
+ b_elt = b_elt->next;
+ if (ior)
+ {
+ dst_prev = dst_elt;
+ dst_elt = dst_elt->next;
+ }
+ }
+ else
+ {
+ /* Copy a single element. */
+ bitmap_element *src;
+
+ if (!b_elt || (a_elt && a_elt->indx < b_elt->indx))
+ {
+ src = a_elt;
+ a_elt = a_elt->next;
+ }
+ else
+ {
+ src = b_elt;
+ b_elt = b_elt->next;
+ }
+
+ if (!dst_elt)
+ dst_elt = bitmap_elt_insert_after (dst, dst_prev);
+
+ dst_elt->indx = src->indx;
+ memcpy (dst_elt->bits, src->bits, sizeof (dst_elt->bits));
+ dst_prev = dst_elt;
+ dst_elt = dst_elt->next;
+ }
}
+ bitmap_elt_clear_from (dst, dst_elt);
+ gcc_assert (!dst->current == !dst->first);
+ if (dst->current)
+ dst->indx = dst->current->indx;
+}
- /* If the output bitmap was one of the inputs, free up its
- elements now that we're done. */
- for (; delete_list != 0; delete_list = to_ptr)
+/* A ^= B */
+
+void
+bitmap_xor_into (bitmap a, bitmap b)
+{
+ bitmap_element *a_elt = a->first;
+ bitmap_element *b_elt = b->first;
+ bitmap_element *a_prev = NULL;
+
+ gcc_assert (a != b);
+ while (b_elt)
{
- to_ptr = delete_list->next;
- delete_list->next = bitmap_free;
- bitmap_free = delete_list;
+ if (!a_elt || b_elt->indx < a_elt->indx)
+ {
+ /* Copy b_elt. */
+ bitmap_element *dst = bitmap_elt_insert_after (a, a_prev);
+
+ dst->indx = b_elt->indx;
+ memcpy (dst->bits, b_elt->bits, sizeof (dst->bits));
+ a_prev = dst;
+ b_elt = b_elt->next;
+ }
+ else if (a_elt->indx < b_elt->indx)
+ {
+ a_prev = a_elt;
+ a_elt = a_elt->next;
+ }
+ else
+ {
+ /* Matching elts, generate A ^= B. */
+ unsigned ix;
+ BITMAP_WORD ior = 0;
+ bitmap_element *next = a_elt->next;
+
+ for (ix = BITMAP_ELEMENT_WORDS; ix--;)
+ {
+ BITMAP_WORD r = a_elt->bits[ix] ^ b_elt->bits[ix];
+
+ ior |= r;
+ a_elt->bits[ix] = r;
+ }
+ b_elt = b_elt->next;
+ if (ior)
+ a_prev = a_elt;
+ else
+ bitmap_element_free (a, a_elt);
+ a_elt = next;
+ }
}
+ gcc_assert (!a->current == !a->first);
+ if (a->current)
+ a->indx = a->current->indx;
}
+
+/* Return true if two bitmaps are identical.
+ We do not bother with a check for pointer equality, as that never
+ occurs in practice. */
+
+bool
+bitmap_equal_p (bitmap a, bitmap b)
+{
+ bitmap_element *a_elt;
+ bitmap_element *b_elt;
+ unsigned ix;
+
+ for (a_elt = a->first, b_elt = b->first;
+ a_elt && b_elt;
+ a_elt = a_elt->next, b_elt = b_elt->next)
+ {
+ if (a_elt->indx != b_elt->indx)
+ return false;
+ for (ix = BITMAP_ELEMENT_WORDS; ix--;)
+ if (a_elt->bits[ix] != b_elt->bits[ix])
+ return false;
+ }
+ return !a_elt && !b_elt;
+}
+
+/* Return true if A AND B is not empty. */
+
+bool
+bitmap_intersect_p (bitmap a, bitmap b)
+{
+ bitmap_element *a_elt;
+ bitmap_element *b_elt;
+ unsigned ix;
+
+ for (a_elt = a->first, b_elt = b->first;
+ a_elt && b_elt;)
+ {
+ if (a_elt->indx < b_elt->indx)
+ a_elt = a_elt->next;
+ else if (b_elt->indx < a_elt->indx)
+ b_elt = b_elt->next;
+ else
+ {
+ for (ix = BITMAP_ELEMENT_WORDS; ix--;)
+ if (a_elt->bits[ix] & b_elt->bits[ix])
+ return true;
+ a_elt = a_elt->next;
+ b_elt = b_elt->next;
+ }
+ }
+ return false;
+}
+
+/* Return true if A AND NOT B is not empty. */
+
+bool
+bitmap_intersect_compl_p (bitmap a, bitmap b)
+{
+ bitmap_element *a_elt;
+ bitmap_element *b_elt;
+ unsigned ix;
+ for (a_elt = a->first, b_elt = b->first;
+ a_elt && b_elt;)
+ {
+ if (a_elt->indx < b_elt->indx)
+ return true;
+ else if (b_elt->indx < a_elt->indx)
+ b_elt = b_elt->next;
+ else
+ {
+ for (ix = BITMAP_ELEMENT_WORDS; ix--;)
+ if (a_elt->bits[ix] & ~b_elt->bits[ix])
+ return true;
+ a_elt = a_elt->next;
+ b_elt = b_elt->next;
+ }
+ }
+ return a_elt != NULL;
+}
+
\f
-/* Or into bitmap TO bitmap FROM1 and'ed with the complement of
- bitmap FROM2. */
+/* DST = A | (FROM1 & ~FROM2). Return true if DST changes. */
-void
-bitmap_ior_and_compl (to, from1, from2)
- bitmap to;
- bitmap from1;
- bitmap from2;
+bool
+bitmap_ior_and_compl (bitmap dst, bitmap a, bitmap from1, bitmap from2)
{
bitmap_head tmp;
-
+ bool changed;
+
tmp.first = tmp.current = 0;
+ tmp.using_obstack = 0;
+ bitmap_and_compl (&tmp, from1, from2);
+ changed = bitmap_ior (dst, a, &tmp);
+ bitmap_clear (&tmp);
- bitmap_operation (&tmp, from1, from2, BITMAP_AND_COMPL);
- bitmap_operation (to, to, &tmp, BITMAP_IOR);
+ return changed;
+}
+
+/* A |= (FROM1 & ~FROM2). Return true if A changes. */
+
+bool
+bitmap_ior_and_compl_into (bitmap a, bitmap from1, bitmap from2)
+{
+ bitmap_head tmp;
+ bool changed;
+
+ tmp.first = tmp.current = 0;
+ tmp.using_obstack = 0;
+ bitmap_and_compl (&tmp, from1, from2);
+ changed = bitmap_ior_into (a, &tmp);
bitmap_clear (&tmp);
+
+ return changed;
}
\f
/* Initialize a bitmap header. */
bitmap
-bitmap_initialize (head)
- bitmap head;
+bitmap_initialize (bitmap head, int using_obstack)
{
+ if (head == NULL && ! using_obstack)
+ head = GGC_NEW (struct bitmap_head_def);
+
head->first = head->current = 0;
+ head->using_obstack = using_obstack;
return head;
}
/* Debugging function to print out the contents of a bitmap. */
void
-bitmap_debug_file (file, head)
- FILE *file;
- bitmap head;
+debug_bitmap_file (FILE *file, bitmap head)
{
bitmap_element *ptr;
- fprintf (file, "\nfirst = ");
- fprintf (file, HOST_PTR_PRINTF, (HOST_WIDE_INT) head->first);
- fprintf (file, " current = ");
- fprintf (file, HOST_PTR_PRINTF, (HOST_WIDE_INT) head->current);
- fprintf (file, " indx = %u\n", head->indx);
+ fprintf (file, "\nfirst = " HOST_PTR_PRINTF
+ " current = " HOST_PTR_PRINTF " indx = %u\n",
+ (void *) head->first, (void *) head->current, head->indx);
for (ptr = head->first; ptr; ptr = ptr->next)
{
- int i, j, col = 26;
+ unsigned int i, j, col = 26;
- fprintf (file, "\t");
- fprintf (file, HOST_PTR_PRINTF, (HOST_WIDE_INT) ptr);
- fprintf (file, " next = ");
- fprintf (file, HOST_PTR_PRINTF, (HOST_WIDE_INT) ptr->next);
- fprintf (file, " prev = ");
- fprintf (file, HOST_PTR_PRINTF, (HOST_WIDE_INT) ptr->prev);
- fprintf (file, " indx = %u\n\t\tbits = {", ptr->indx);
+ fprintf (file, "\t" HOST_PTR_PRINTF " next = " HOST_PTR_PRINTF
+ " prev = " HOST_PTR_PRINTF " indx = %u\n\t\tbits = {",
+ (void*) ptr, (void*) ptr->next, (void*) ptr->prev, ptr->indx);
for (i = 0; i < BITMAP_ELEMENT_WORDS; i++)
- for (j = 0; j < HOST_BITS_PER_WIDE_INT; j++)
- if ((ptr->bits[i] & (((unsigned HOST_WIDE_INT) 1) << j)) != 0)
+ for (j = 0; j < BITMAP_WORD_BITS; j++)
+ if ((ptr->bits[i] >> j) & 1)
{
if (col > 70)
{
}
fprintf (file, " %u", (ptr->indx * BITMAP_ELEMENT_ALL_BITS
- + i * HOST_BITS_PER_WIDE_INT + j));
+ + i * BITMAP_WORD_BITS + j));
col += 4;
}
fprintf (file, " }\n");
}
}
-\f
+
/* Function to be called from the debugger to print the contents
of a bitmap. */
void
-debug_bitmap (head)
- bitmap head;
+debug_bitmap (bitmap head)
{
- bitmap_debug_file (stdout, head);
+ debug_bitmap_file (stdout, head);
}
-\f
-/* Release any memory allocated by bitmaps. Since we allocate off of the
- function_obstack, just zap the free list. */
+
+/* Function to print out the contents of a bitmap. Unlike debug_bitmap_file,
+ it does not print anything but the bits. */
void
-bitmap_release_memory ()
+bitmap_print (FILE *file, bitmap head, const char *prefix, const char *suffix)
{
- bitmap_free = 0;
+ const char *comma = "";
+ unsigned i;
+ bitmap_iterator bi;
+
+ fputs (prefix, file);
+ EXECUTE_IF_SET_IN_BITMAP (head, 0, i, bi)
+ {
+ fprintf (file, "%s%d", comma, i);
+ comma = ", ";
+ }
+ fputs (suffix, file);
}
+
+#include "gt-bitmap.h"
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