--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/sbitmap.c	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,1098 @@
+/* Simple bitmaps.
+   Copyright (C) 1999, 2000, 2002, 2003, 2004, 2006, 2007, 2008
+   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
+<http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "rtl.h"
+#include "flags.h"
+#include "hard-reg-set.h"
+#include "obstack.h"
+#include "basic-block.h"
+
+#if GCC_VERSION >= 3400
+#if HOST_BITS_PER_WIDEST_FAST_INT == HOST_BITS_PER_LONG
+#define do_popcount(x) __builtin_popcountl(x)
+#elif HOST_BITS_PER_WIDEST_FAST_INT == HOST_BITS_PER_LONGLONG
+#define do_popcount(x) __builtin_popcountll(x)
+#else
+#error "internal error: sbitmap.h and hwint.h are inconsistent"
+#endif
+#else
+static unsigned long sbitmap_elt_popcount (SBITMAP_ELT_TYPE);
+#define do_popcount(x) sbitmap_elt_popcount((x))
+#endif
+
+/* This macro controls debugging that is as expensive as the
+   operations it verifies.  */
+
+/* #define BITMAP_DEBUGGING  */
+#ifdef BITMAP_DEBUGGING
+
+/* Verify the population count of sbitmap A matches the cached value,
+   if there is a cached value. */
+
+void
+sbitmap_verify_popcount (const_sbitmap a)
+{
+  unsigned ix;
+  unsigned int lastword;
+  
+  if (!a->popcount)
+    return;
+
+  lastword = a->size;
+  for (ix = 0; ix < lastword; ix++)
+    gcc_assert (a->popcount[ix] == do_popcount (a->elms[ix]));
+}
+#endif
+
+/* Bitmap manipulation routines.  */
+
+/* Allocate a simple bitmap of N_ELMS bits.  */
+
+sbitmap
+sbitmap_alloc (unsigned int n_elms)
+{
+  unsigned int bytes, size, amt;
+  sbitmap bmap;
+
+  size = SBITMAP_SET_SIZE (n_elms);
+  bytes = size * sizeof (SBITMAP_ELT_TYPE);
+  amt = (sizeof (struct simple_bitmap_def)
+	 + bytes - sizeof (SBITMAP_ELT_TYPE));
+  bmap = (sbitmap) xmalloc (amt);
+  bmap->n_bits = n_elms;
+  bmap->size = size;
+  bmap->popcount = NULL;
+  return bmap;
+}
+
+/* Allocate a simple bitmap of N_ELMS bits, and a popcount array.  */
+
+sbitmap
+sbitmap_alloc_with_popcount (unsigned int n_elms)
+{
+  sbitmap const bmap = sbitmap_alloc (n_elms);  
+  bmap->popcount = XNEWVEC (unsigned char, bmap->size);
+  return bmap;
+}
+
+/* Resize a simple bitmap BMAP to N_ELMS bits.  If increasing the
+   size of BMAP, clear the new bits to zero if the DEF argument
+   is zero, and set them to one otherwise.  */
+
+sbitmap
+sbitmap_resize (sbitmap bmap, unsigned int n_elms, int def)
+{
+  unsigned int bytes, size, amt;
+  unsigned int last_bit;
+
+  size = SBITMAP_SET_SIZE (n_elms);
+  bytes = size * sizeof (SBITMAP_ELT_TYPE);
+  if (bytes > SBITMAP_SIZE_BYTES (bmap))
+    {
+      amt = (sizeof (struct simple_bitmap_def)
+	    + bytes - sizeof (SBITMAP_ELT_TYPE));
+      bmap = (sbitmap) xrealloc (bmap, amt);
+      if (bmap->popcount)
+	bmap->popcount = XRESIZEVEC (unsigned char, bmap->popcount, size);
+    }
+
+  if (n_elms > bmap->n_bits)
+    {
+      if (def)
+	{
+	  memset (bmap->elms + bmap->size, -1, 
+		  bytes - SBITMAP_SIZE_BYTES (bmap));
+
+	  /* Set the new bits if the original last element.  */
+	  last_bit = bmap->n_bits % SBITMAP_ELT_BITS;
+	  if (last_bit)
+	    bmap->elms[bmap->size - 1]
+	      |= ~((SBITMAP_ELT_TYPE)-1 >> (SBITMAP_ELT_BITS - last_bit));
+
+	  /* Clear the unused bit in the new last element.  */
+	  last_bit = n_elms % SBITMAP_ELT_BITS;
+	  if (last_bit)
+	    bmap->elms[size - 1]
+	      &= (SBITMAP_ELT_TYPE)-1 >> (SBITMAP_ELT_BITS - last_bit);
+	}
+      else
+	{
+	  memset (bmap->elms + bmap->size, 0, 
+		  bytes - SBITMAP_SIZE_BYTES (bmap));
+	  if (bmap->popcount)
+	    memset (bmap->popcount + bmap->size, 0,
+		    (size * sizeof (unsigned char)) 
+		    - (bmap->size * sizeof (unsigned char)));
+		    
+	}
+    }
+  else if (n_elms < bmap->n_bits)
+    {
+      /* Clear the surplus bits in the last word.  */
+      last_bit = n_elms % SBITMAP_ELT_BITS;
+      if (last_bit)
+	{
+	  bmap->elms[size - 1]
+	    &= (SBITMAP_ELT_TYPE)-1 >> (SBITMAP_ELT_BITS - last_bit);
+	  if (bmap->popcount)
+	    bmap->popcount[size - 1] = do_popcount (bmap->elms[size - 1]);
+	}
+    }
+
+  bmap->n_bits = n_elms;
+  bmap->size = size;
+  return bmap;
+}
+
+/* Re-allocate a simple bitmap of N_ELMS bits. New storage is uninitialized.  */
+
+sbitmap
+sbitmap_realloc (sbitmap src, unsigned int n_elms)
+{
+  unsigned int bytes, size, amt;
+  sbitmap bmap;
+
+  size = SBITMAP_SET_SIZE (n_elms);
+  bytes = size * sizeof (SBITMAP_ELT_TYPE);
+  amt = (sizeof (struct simple_bitmap_def)
+	 + bytes - sizeof (SBITMAP_ELT_TYPE));
+
+  if (SBITMAP_SIZE_BYTES (src)  >= bytes)
+    {
+      src->n_bits = n_elms;
+      return src;
+    }
+
+  bmap = (sbitmap) xrealloc (src, amt);
+  bmap->n_bits = n_elms;
+  bmap->size = size;
+  return bmap;
+}
+
+/* Allocate a vector of N_VECS bitmaps of N_ELMS bits.  */
+
+sbitmap *
+sbitmap_vector_alloc (unsigned int n_vecs, unsigned int n_elms)
+{
+  unsigned int i, bytes, offset, elm_bytes, size, amt, vector_bytes;
+  sbitmap *bitmap_vector;
+
+  size = SBITMAP_SET_SIZE (n_elms);
+  bytes = size * sizeof (SBITMAP_ELT_TYPE);
+  elm_bytes = (sizeof (struct simple_bitmap_def)
+	       + bytes - sizeof (SBITMAP_ELT_TYPE));
+  vector_bytes = n_vecs * sizeof (sbitmap *);
+
+  /* Round up `vector_bytes' to account for the alignment requirements
+     of an sbitmap.  One could allocate the vector-table and set of sbitmaps
+     separately, but that requires maintaining two pointers or creating
+     a cover struct to hold both pointers (so our result is still just
+     one pointer).  Neither is a bad idea, but this is simpler for now.  */
+  {
+    /* Based on DEFAULT_ALIGNMENT computation in obstack.c.  */
+    struct { char x; SBITMAP_ELT_TYPE y; } align;
+    int alignment = (char *) & align.y - & align.x;
+    vector_bytes = (vector_bytes + alignment - 1) & ~ (alignment - 1);
+  }
+
+  amt = vector_bytes + (n_vecs * elm_bytes);
+  bitmap_vector = (sbitmap *) xmalloc (amt);
+
+  for (i = 0, offset = vector_bytes; i < n_vecs; i++, offset += elm_bytes)
+    {
+      sbitmap b = (sbitmap) ((char *) bitmap_vector + offset);
+
+      bitmap_vector[i] = b;
+      b->n_bits = n_elms;
+      b->size = size;
+      b->popcount = NULL;
+    }
+
+  return bitmap_vector;
+}
+
+/* Copy sbitmap SRC to DST.  */
+
+void
+sbitmap_copy (sbitmap dst, const_sbitmap src)
+{
+  memcpy (dst->elms, src->elms, sizeof (SBITMAP_ELT_TYPE) * dst->size);
+  if (dst->popcount)
+    memcpy (dst->popcount, src->popcount, sizeof (unsigned char) * dst->size);
+}
+
+/* Copy the first N elements of sbitmap SRC to DST.  */
+
+void
+sbitmap_copy_n (sbitmap dst, const_sbitmap src, unsigned int n)
+{
+  memcpy (dst->elms, src->elms, sizeof (SBITMAP_ELT_TYPE) * n);  
+  if (dst->popcount)
+    memcpy (dst->popcount, src->popcount, sizeof (unsigned char) * n);
+}
+
+/* Determine if a == b.  */
+int
+sbitmap_equal (const_sbitmap a, const_sbitmap b)
+{
+  return !memcmp (a->elms, b->elms, sizeof (SBITMAP_ELT_TYPE) * a->size);
+}
+
+/* Return true if the bitmap is empty.  */
+
+bool
+sbitmap_empty_p (const_sbitmap bmap)
+{
+  unsigned int i;
+  for (i=0; i<bmap->size; i++)
+    if (bmap->elms[i])
+      return false;
+
+  return true;
+}
+
+/* Return false if any of the N bits are set in MAP starting at
+   START.  */
+
+bool 
+sbitmap_range_empty_p (const_sbitmap bmap, unsigned int start, unsigned int n)
+{
+  unsigned int i = start / SBITMAP_ELT_BITS;
+  SBITMAP_ELT_TYPE elm;
+  unsigned int shift = start % SBITMAP_ELT_BITS;
+
+  gcc_assert (bmap->n_bits >= start + n);
+
+  elm = bmap->elms[i];
+  elm = elm >> shift;
+
+  if (shift + n <= SBITMAP_ELT_BITS)
+    {
+      /* The bits are totally contained in a single element.  */
+      if (shift + n < SBITMAP_ELT_BITS)
+        elm &= ((1 << n) - 1);
+      return (elm == 0);
+    }
+
+  if (elm) 
+    return false;
+
+  n -= SBITMAP_ELT_BITS - shift;
+  i++;
+
+  /* Deal with full elts.  */
+  while (n >= SBITMAP_ELT_BITS)
+    {
+      if (bmap->elms[i])
+	return false;
+      i++;
+      n -= SBITMAP_ELT_BITS;
+    }
+
+  /* The leftover bits.  */
+  if (n)
+    {
+      elm = bmap->elms[i];
+      elm &= ((1 << n) - 1);
+      return (elm == 0);
+    }  
+
+  return true;
+}
+
+
+
+/* Zero all elements in a bitmap.  */
+
+void
+sbitmap_zero (sbitmap bmap)
+{
+  memset (bmap->elms, 0, SBITMAP_SIZE_BYTES (bmap));
+  if (bmap->popcount)
+    memset (bmap->popcount, 0, bmap->size * sizeof (unsigned char));
+}
+
+/* Set all elements in a bitmap to ones.  */
+
+void
+sbitmap_ones (sbitmap bmap)
+{
+  unsigned int last_bit;
+
+  memset (bmap->elms, -1, SBITMAP_SIZE_BYTES (bmap));
+  if (bmap->popcount)
+    memset (bmap->popcount, -1, bmap->size * sizeof (unsigned char));
+
+  last_bit = bmap->n_bits % SBITMAP_ELT_BITS;
+  if (last_bit)
+    {
+      bmap->elms[bmap->size - 1]
+	= (SBITMAP_ELT_TYPE)-1 >> (SBITMAP_ELT_BITS - last_bit);
+      if (bmap->popcount)
+	bmap->popcount[bmap->size - 1] 
+	  = do_popcount (bmap->elms[bmap->size - 1]);
+    }
+}
+
+/* Zero a vector of N_VECS bitmaps.  */
+
+void
+sbitmap_vector_zero (sbitmap *bmap, unsigned int n_vecs)
+{
+  unsigned int i;
+
+  for (i = 0; i < n_vecs; i++)
+    sbitmap_zero (bmap[i]);
+}
+
+/* Set a vector of N_VECS bitmaps to ones.  */
+
+void
+sbitmap_vector_ones (sbitmap *bmap, unsigned int n_vecs)
+{
+  unsigned int i;
+
+  for (i = 0; i < n_vecs; i++)
+    sbitmap_ones (bmap[i]);
+}
+
+/* Set DST to be A union (B - C).
+   DST = A | (B & ~C).
+   Returns true if any change is made.  */
+
+bool
+sbitmap_union_of_diff_cg (sbitmap dst, const_sbitmap a, const_sbitmap b, const_sbitmap c)
+{
+  unsigned int i, n = dst->size;
+  sbitmap_ptr dstp = dst->elms;
+  const_sbitmap_ptr ap = a->elms;
+  const_sbitmap_ptr bp = b->elms;
+  const_sbitmap_ptr cp = c->elms;
+  SBITMAP_ELT_TYPE changed = 0;
+
+  gcc_assert (!dst->popcount);
+  
+  for (i = 0; i < n; i++)
+    {
+      const SBITMAP_ELT_TYPE tmp = *ap++ | (*bp++ & ~*cp++);
+      changed |= *dstp ^ tmp;
+      *dstp++ = tmp;
+    }
+
+  return changed != 0;
+}
+
+void
+sbitmap_union_of_diff (sbitmap dst, const_sbitmap a, const_sbitmap b, const_sbitmap c)
+{
+  unsigned int i, n = dst->size;
+  sbitmap_ptr dstp = dst->elms;
+  const_sbitmap_ptr ap = a->elms;
+  const_sbitmap_ptr bp = b->elms;
+  const_sbitmap_ptr cp = c->elms;
+
+  gcc_assert (!dst->popcount && !a->popcount
+	      && !b->popcount && !c->popcount);
+
+  for (i = 0; i < n; i++)
+    *dstp++ = *ap++ | (*bp++ & ~*cp++);
+}
+
+/* Set bitmap DST to the bitwise negation of the bitmap SRC.  */
+
+void
+sbitmap_not (sbitmap dst, const_sbitmap src)
+{
+  unsigned int i, n = dst->size;
+  sbitmap_ptr dstp = dst->elms;
+  const_sbitmap_ptr srcp = src->elms;
+  unsigned int last_bit;
+
+  gcc_assert (!dst->popcount);  
+
+  for (i = 0; i < n; i++)
+    *dstp++ = ~*srcp++;
+
+  /* Zero all bits past n_bits, by ANDing dst with sbitmap_ones.  */
+  last_bit = src->n_bits % SBITMAP_ELT_BITS;
+  if (last_bit)
+    dst->elms[n-1] = dst->elms[n-1]
+      & ((SBITMAP_ELT_TYPE)-1 >> (SBITMAP_ELT_BITS - last_bit));
+}
+
+/* Set the bits in DST to be the difference between the bits
+   in A and the bits in B. i.e. dst = a & (~b).  */
+
+void
+sbitmap_difference (sbitmap dst, const_sbitmap a, const_sbitmap b)
+{
+  unsigned int i, dst_size = dst->size;
+  unsigned int min_size = dst->size;
+  sbitmap_ptr dstp = dst->elms;
+  const_sbitmap_ptr ap = a->elms;
+  const_sbitmap_ptr bp = b->elms;
+
+  gcc_assert (!dst->popcount);
+
+  /* A should be at least as large as DEST, to have a defined source.  */
+  gcc_assert (a->size >= dst_size);
+  /* If minuend is smaller, we simply pretend it to be zero bits, i.e.
+     only copy the subtrahend into dest.  */
+  if (b->size < min_size)
+    min_size = b->size;
+  for (i = 0; i < min_size; i++)
+    *dstp++ = *ap++ & (~*bp++);
+  /* Now fill the rest of dest from A, if B was too short.
+     This makes sense only when destination and A differ.  */
+  if (dst != a && i != dst_size)
+    for (; i < dst_size; i++)
+      *dstp++ = *ap++;
+}
+
+/* Return true if there are any bits set in A are also set in B.
+   Return false otherwise.  */
+
+bool
+sbitmap_any_common_bits (const_sbitmap a, const_sbitmap b)
+{
+  const_sbitmap_ptr ap = a->elms;
+  const_sbitmap_ptr bp = b->elms;
+  unsigned int i, n;
+
+  n = MIN (a->size, b->size);
+  for (i = 0; i < n; i++)
+    if ((*ap++ & *bp++) != 0)
+      return true;
+
+  return false;
+}
+
+/* Set DST to be (A and B).
+   Return nonzero if any change is made.  */
+
+bool
+sbitmap_a_and_b_cg (sbitmap dst, const_sbitmap a, const_sbitmap b)
+{
+  unsigned int i, n = dst->size;
+  sbitmap_ptr dstp = dst->elms;
+  const_sbitmap_ptr ap = a->elms;
+  const_sbitmap_ptr bp = b->elms;
+  SBITMAP_ELT_TYPE changed = 0;
+
+  gcc_assert (!dst->popcount);
+
+  for (i = 0; i < n; i++)
+    {
+      const SBITMAP_ELT_TYPE tmp = *ap++ & *bp++;
+      changed |= *dstp ^ tmp;
+      *dstp++ = tmp;
+    }
+
+  return changed != 0;
+}
+
+void
+sbitmap_a_and_b (sbitmap dst, const_sbitmap a, const_sbitmap b)
+{
+  unsigned int i, n = dst->size;
+  sbitmap_ptr dstp = dst->elms;
+  const_sbitmap_ptr ap = a->elms;
+  const_sbitmap_ptr bp = b->elms;
+  bool has_popcount = dst->popcount != NULL;
+  unsigned char *popcountp = dst->popcount;
+
+  for (i = 0; i < n; i++)
+    {
+      const SBITMAP_ELT_TYPE tmp = *ap++ & *bp++;
+      if (has_popcount)
+	{
+	  bool wordchanged = (*dstp ^ tmp) != 0;
+	  if (wordchanged)
+	    *popcountp = do_popcount (tmp);
+	  popcountp++;
+	}      
+      *dstp++ = tmp;
+    }
+#ifdef BITMAP_DEBUGGING
+  if (has_popcount)
+    sbitmap_verify_popcount (dst);
+#endif
+}
+
+/* Set DST to be (A xor B)).
+   Return nonzero if any change is made.  */
+
+bool
+sbitmap_a_xor_b_cg (sbitmap dst, const_sbitmap a, const_sbitmap b)
+{
+  unsigned int i, n = dst->size;
+  sbitmap_ptr dstp = dst->elms;
+  const_sbitmap_ptr ap = a->elms;
+  const_sbitmap_ptr bp = b->elms;
+  SBITMAP_ELT_TYPE changed = 0;
+  
+  gcc_assert (!dst->popcount);
+
+  for (i = 0; i < n; i++)
+    {
+      const SBITMAP_ELT_TYPE tmp = *ap++ ^ *bp++;
+      changed |= *dstp ^ tmp;
+      *dstp++ = tmp;
+    }
+
+  return changed != 0;
+}
+
+void
+sbitmap_a_xor_b (sbitmap dst, const_sbitmap a, const_sbitmap b)
+{
+  unsigned int i, n = dst->size;
+  sbitmap_ptr dstp = dst->elms;
+  const_sbitmap_ptr ap = a->elms;
+  const_sbitmap_ptr bp = b->elms;
+  bool has_popcount = dst->popcount != NULL;
+  unsigned char *popcountp = dst->popcount;
+
+  for (i = 0; i < n; i++)
+    {
+      const SBITMAP_ELT_TYPE tmp = *ap++ ^ *bp++;
+      if (has_popcount)
+	{
+	  bool wordchanged = (*dstp ^ tmp) != 0;
+	  if (wordchanged)
+	    *popcountp = do_popcount (tmp);
+	  popcountp++;
+	} 
+      *dstp++ = tmp;
+    }
+#ifdef BITMAP_DEBUGGING
+  if (has_popcount)
+    sbitmap_verify_popcount (dst);
+#endif
+}
+
+/* Set DST to be (A or B)).
+   Return nonzero if any change is made.  */
+
+bool
+sbitmap_a_or_b_cg (sbitmap dst, const_sbitmap a, const_sbitmap b)
+{
+  unsigned int i, n = dst->size;
+  sbitmap_ptr dstp = dst->elms;
+  const_sbitmap_ptr ap = a->elms;
+  const_sbitmap_ptr bp = b->elms;
+  SBITMAP_ELT_TYPE changed = 0;
+
+  gcc_assert (!dst->popcount);
+
+  for (i = 0; i < n; i++)
+    {
+      const SBITMAP_ELT_TYPE tmp = *ap++ | *bp++;
+      changed |= *dstp ^ tmp;
+      *dstp++ = tmp;
+    }
+
+  return changed != 0;
+}
+
+void
+sbitmap_a_or_b (sbitmap dst, const_sbitmap a, const_sbitmap b)
+{
+  unsigned int i, n = dst->size;
+  sbitmap_ptr dstp = dst->elms;
+  const_sbitmap_ptr ap = a->elms;
+  const_sbitmap_ptr bp = b->elms;
+  bool has_popcount = dst->popcount != NULL;
+  unsigned char *popcountp = dst->popcount;
+
+  for (i = 0; i < n; i++)
+    {
+      const SBITMAP_ELT_TYPE tmp = *ap++ | *bp++;
+      if (has_popcount)
+	{
+	  bool wordchanged = (*dstp ^ tmp) != 0;
+	  if (wordchanged)
+	    *popcountp = do_popcount (tmp);
+	  popcountp++;
+	} 
+      *dstp++ = tmp;
+    }
+#ifdef BITMAP_DEBUGGING
+  if (has_popcount)
+    sbitmap_verify_popcount (dst);
+#endif
+}
+
+/* Return nonzero if A is a subset of B.  */
+
+bool
+sbitmap_a_subset_b_p (const_sbitmap a, const_sbitmap b)
+{
+  unsigned int i, n = a->size;
+  const_sbitmap_ptr ap, bp;
+
+  for (ap = a->elms, bp = b->elms, i = 0; i < n; i++, ap++, bp++)
+    if ((*ap | *bp) != *bp)
+      return false;
+
+  return true;
+}
+
+/* Set DST to be (A or (B and C)).
+   Return nonzero if any change is made.  */
+
+bool
+sbitmap_a_or_b_and_c_cg (sbitmap dst, const_sbitmap a, const_sbitmap b, const_sbitmap c)
+{
+  unsigned int i, n = dst->size;
+  sbitmap_ptr dstp = dst->elms;
+  const_sbitmap_ptr ap = a->elms;
+  const_sbitmap_ptr bp = b->elms;
+  const_sbitmap_ptr cp = c->elms;
+  SBITMAP_ELT_TYPE changed = 0;
+
+  gcc_assert (!dst->popcount);
+
+  for (i = 0; i < n; i++)
+    {
+      const SBITMAP_ELT_TYPE tmp = *ap++ | (*bp++ & *cp++);
+      changed |= *dstp ^ tmp;
+      *dstp++ = tmp;
+    }
+
+  return changed != 0;
+}
+
+void
+sbitmap_a_or_b_and_c (sbitmap dst, const_sbitmap a, const_sbitmap b, const_sbitmap c)
+{
+  unsigned int i, n = dst->size;
+  sbitmap_ptr dstp = dst->elms;
+  const_sbitmap_ptr ap = a->elms;
+  const_sbitmap_ptr bp = b->elms;
+  const_sbitmap_ptr cp = c->elms;
+
+  gcc_assert (!dst->popcount);
+
+  for (i = 0; i < n; i++)
+    *dstp++ = *ap++ | (*bp++ & *cp++);
+}
+
+/* Set DST to be (A and (B or C)).
+   Return nonzero if any change is made.  */
+
+bool
+sbitmap_a_and_b_or_c_cg (sbitmap dst, const_sbitmap a, const_sbitmap b, const_sbitmap c)
+{
+  unsigned int i, n = dst->size;
+  sbitmap_ptr dstp = dst->elms;
+  const_sbitmap_ptr ap = a->elms;
+  const_sbitmap_ptr bp = b->elms;
+  const_sbitmap_ptr cp = c->elms;
+  SBITMAP_ELT_TYPE changed = 0;
+
+  gcc_assert (!dst->popcount);
+
+  for (i = 0; i < n; i++)
+    {
+      const SBITMAP_ELT_TYPE tmp = *ap++ & (*bp++ | *cp++);
+      changed |= *dstp ^ tmp;
+      *dstp++ = tmp;
+    }
+
+  return changed != 0;
+}
+
+void
+sbitmap_a_and_b_or_c (sbitmap dst, const_sbitmap a, const_sbitmap b, const_sbitmap c)
+{
+  unsigned int i, n = dst->size;
+  sbitmap_ptr dstp = dst->elms;
+  const_sbitmap_ptr ap = a->elms;
+  const_sbitmap_ptr bp = b->elms;
+  const_sbitmap_ptr cp = c->elms;
+
+  for (i = 0; i < n; i++)
+    *dstp++ = *ap++ & (*bp++ | *cp++);
+}
+
+#ifdef IN_GCC
+/* Set the bitmap DST to the intersection of SRC of successors of
+   block number BB, using the new flow graph structures.  */
+
+void
+sbitmap_intersection_of_succs (sbitmap dst, sbitmap *src, int bb)
+{
+  basic_block b = BASIC_BLOCK (bb);
+  unsigned int set_size = dst->size;
+  edge e;
+  unsigned ix;
+
+  gcc_assert (!dst->popcount);
+
+  for (e = NULL, ix = 0; ix < EDGE_COUNT (b->succs); ix++)
+    {
+      e = EDGE_SUCC (b, ix);
+      if (e->dest == EXIT_BLOCK_PTR)
+	continue;
+      
+      sbitmap_copy (dst, src[e->dest->index]);
+      break;
+    }
+
+  if (e == 0)
+    sbitmap_ones (dst);
+  else
+    for (++ix; ix < EDGE_COUNT (b->succs); ix++)
+      {
+	unsigned int i;
+	sbitmap_ptr p, r;
+
+	e = EDGE_SUCC (b, ix);
+	if (e->dest == EXIT_BLOCK_PTR)
+	  continue;
+
+	p = src[e->dest->index]->elms;
+	r = dst->elms;
+	for (i = 0; i < set_size; i++)
+	  *r++ &= *p++;
+      }
+}
+
+/* Set the bitmap DST to the intersection of SRC of predecessors of
+   block number BB, using the new flow graph structures.  */
+
+void
+sbitmap_intersection_of_preds (sbitmap dst, sbitmap *src, int bb)
+{
+  basic_block b = BASIC_BLOCK (bb);
+  unsigned int set_size = dst->size;
+  edge e;
+  unsigned ix;
+
+  gcc_assert (!dst->popcount);
+
+  for (e = NULL, ix = 0; ix < EDGE_COUNT (b->preds); ix++)
+    {
+      e = EDGE_PRED (b, ix);
+      if (e->src == ENTRY_BLOCK_PTR)
+	continue;
+
+      sbitmap_copy (dst, src[e->src->index]);
+      break;
+    }
+
+  if (e == 0)
+    sbitmap_ones (dst);
+  else
+    for (++ix; ix < EDGE_COUNT (b->preds); ix++)
+      {
+	unsigned int i;
+	sbitmap_ptr p, r;
+
+	e = EDGE_PRED (b, ix);
+	if (e->src == ENTRY_BLOCK_PTR)
+	  continue;
+
+	p = src[e->src->index]->elms;
+	r = dst->elms;
+	for (i = 0; i < set_size; i++)
+	  *r++ &= *p++;
+      }
+}
+
+/* Set the bitmap DST to the union of SRC of successors of
+   block number BB, using the new flow graph structures.  */
+
+void
+sbitmap_union_of_succs (sbitmap dst, sbitmap *src, int bb)
+{
+  basic_block b = BASIC_BLOCK (bb);
+  unsigned int set_size = dst->size;
+  edge e;
+  unsigned ix;
+
+  gcc_assert (!dst->popcount);
+
+  for (ix = 0; ix < EDGE_COUNT (b->succs); ix++)
+    {
+      e = EDGE_SUCC (b, ix);
+      if (e->dest == EXIT_BLOCK_PTR)
+	continue;
+
+      sbitmap_copy (dst, src[e->dest->index]);
+      break;
+    }
+
+  if (ix == EDGE_COUNT (b->succs))
+    sbitmap_zero (dst);
+  else
+    for (ix++; ix < EDGE_COUNT (b->succs); ix++)
+      {
+	unsigned int i;
+	sbitmap_ptr p, r;
+
+	e = EDGE_SUCC (b, ix);
+	if (e->dest == EXIT_BLOCK_PTR)
+	  continue;
+
+	p = src[e->dest->index]->elms;
+	r = dst->elms;
+	for (i = 0; i < set_size; i++)
+	  *r++ |= *p++;
+      }
+}
+
+/* Set the bitmap DST to the union of SRC of predecessors of
+   block number BB, using the new flow graph structures.  */
+
+void
+sbitmap_union_of_preds (sbitmap dst, sbitmap *src, int bb)
+{
+  basic_block b = BASIC_BLOCK (bb);
+  unsigned int set_size = dst->size;
+  edge e;
+  unsigned ix;
+
+  gcc_assert (!dst->popcount);
+
+  for (ix = 0; ix < EDGE_COUNT (b->preds); ix++)
+    {
+      e = EDGE_PRED (b, ix);
+      if (e->src== ENTRY_BLOCK_PTR)
+	continue;
+
+      sbitmap_copy (dst, src[e->src->index]);
+      break;
+    }
+
+  if (ix == EDGE_COUNT (b->preds))
+    sbitmap_zero (dst);
+  else
+    for (ix++; ix < EDGE_COUNT (b->preds); ix++)
+      {
+	unsigned int i;
+	sbitmap_ptr p, r;
+
+	e = EDGE_PRED (b, ix);
+	if (e->src == ENTRY_BLOCK_PTR)
+	  continue;
+
+	p = src[e->src->index]->elms;
+	r = dst->elms;
+	for (i = 0; i < set_size; i++)
+	  *r++ |= *p++;
+      }
+}
+#endif
+
+/* Return number of first bit set in the bitmap, -1 if none.  */
+
+int
+sbitmap_first_set_bit (const_sbitmap bmap)
+{
+  unsigned int n = 0;
+  sbitmap_iterator sbi;
+
+  EXECUTE_IF_SET_IN_SBITMAP (bmap, 0, n, sbi)
+    return n;
+  return -1;
+}
+
+/* Return number of last bit set in the bitmap, -1 if none.  */
+
+int
+sbitmap_last_set_bit (const_sbitmap bmap)
+{
+  int i;
+  const SBITMAP_ELT_TYPE *const ptr = bmap->elms;
+
+  for (i = bmap->size - 1; i >= 0; i--)
+    {
+      const SBITMAP_ELT_TYPE word = ptr[i];
+
+      if (word != 0)
+	{
+	  unsigned int index = (i + 1) * SBITMAP_ELT_BITS - 1;
+	  SBITMAP_ELT_TYPE mask
+	    = (SBITMAP_ELT_TYPE) 1 << (SBITMAP_ELT_BITS - 1);
+
+	  while (1)
+	    {
+	      if ((word & mask) != 0)
+		return index;
+
+	      mask >>= 1;
+	      index--;
+	    }
+	}
+    }
+
+  return -1;
+}
+
+void
+dump_sbitmap (FILE *file, const_sbitmap bmap)
+{
+  unsigned int i, n, j;
+  unsigned int set_size = bmap->size;
+  unsigned int total_bits = bmap->n_bits;
+
+  fprintf (file, "  ");
+  for (i = n = 0; i < set_size && n < total_bits; i++)
+    for (j = 0; j < SBITMAP_ELT_BITS && n < total_bits; j++, n++)
+      {
+	if (n != 0 && n % 10 == 0)
+	  fprintf (file, " ");
+
+	fprintf (file, "%d",
+		 (bmap->elms[i] & ((SBITMAP_ELT_TYPE) 1 << j)) != 0);
+      }
+
+  fprintf (file, "\n");
+}
+
+void
+dump_sbitmap_file (FILE *file, const_sbitmap bmap)
+{
+  unsigned int i, pos;
+
+  fprintf (file, "n_bits = %d, set = {", bmap->n_bits);
+
+  for (pos = 30, i = 0; i < bmap->n_bits; i++)
+    if (TEST_BIT (bmap, i))
+      {
+	if (pos > 70)
+	  {
+	    fprintf (file, "\n  ");
+	    pos = 0;
+	  }
+
+	fprintf (file, "%d ", i);
+	pos += 2 + (i >= 10) + (i >= 100) + (i >= 1000);
+      }
+
+  fprintf (file, "}\n");
+}
+
+void
+debug_sbitmap (const_sbitmap bmap)
+{
+  dump_sbitmap_file (stderr, bmap);
+}
+
+void
+dump_sbitmap_vector (FILE *file, const char *title, const char *subtitle,
+		     sbitmap *bmaps, int n_maps)
+{
+  int bb;
+
+  fprintf (file, "%s\n", title);
+  for (bb = 0; bb < n_maps; bb++)
+    {
+      fprintf (file, "%s %d\n", subtitle, bb);
+      dump_sbitmap (file, bmaps[bb]);
+    }
+
+  fprintf (file, "\n");
+}
+
+#if GCC_VERSION < 3400
+/* Table of number of set bits in a character, indexed by value of char.  */
+static const unsigned char popcount_table[] =
+{
+    0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4,1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
+    1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
+    1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
+    2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
+    1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
+    2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
+    2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
+    3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,4,5,5,6,5,6,6,7,5,6,6,7,6,7,7,8,
+};
+
+/* Count the bits in an SBITMAP element A.  */
+
+static unsigned long
+sbitmap_elt_popcount (SBITMAP_ELT_TYPE a)
+{
+  unsigned long ret = 0;
+  unsigned i;
+
+  if (a == 0)
+    return 0;
+
+  /* Just do this the table way for now  */
+  for (i = 0; i < SBITMAP_ELT_BITS; i += 8)
+    ret += popcount_table[(a >> i) & 0xff];
+  return ret;
+}
+#endif
+
+/* Count the number of bits in SBITMAP a, up to bit MAXBIT.  */
+
+unsigned long
+sbitmap_popcount (const_sbitmap a, unsigned long maxbit)
+{
+  unsigned long count = 0;
+  unsigned ix;
+  unsigned int lastword;
+
+  if (maxbit == 0)
+    return 0;
+  
+  if (maxbit >= a->n_bits)
+    maxbit = a->n_bits;
+
+  /* Count the bits in the full word.  */
+  lastword = MIN (a->size, SBITMAP_SET_SIZE (maxbit + 1) - 1);
+  for (ix = 0; ix < lastword; ix++)
+    {
+      if (a->popcount)
+	{
+	  count += a->popcount[ix];
+#ifdef BITMAP_DEBUGGING
+	  gcc_assert (a->popcount[ix] == do_popcount (a->elms[ix]));
+#endif
+	}
+      else
+	count += do_popcount (a->elms[ix]);
+    }
+
+  /* Count the remaining bits.  */
+  if (lastword < a->size)
+    {
+      unsigned int bitindex;
+      SBITMAP_ELT_TYPE theword = a->elms[lastword];
+
+      bitindex = maxbit % SBITMAP_ELT_BITS;
+      if (bitindex != 0)
+	{
+	  theword &= (SBITMAP_ELT_TYPE)-1 >> (SBITMAP_ELT_BITS - bitindex);
+	  count += do_popcount (theword);
+	}
+    }
+  return count;
+}
+