+2003-12-28 Mostafa Hagog <mustafa@il.ibm.com>
+
+ * sbitmap.c (sbitmap_union_of_diff_cg, sbitmap_a_and_b_cg,
+ sbitmap_a_xor_b_cg): Accumulate "changed" properly.
+ (sbitmap_not): Zero all bits past n_bit.
+
2003-12-27 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz>
PR opt/13159
unsigned int i, n = dst->size;
sbitmap_ptr dstp = dst->elms;
sbitmap_ptr srcp = src->elms;
+ unsigned int last_bit;
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
for (i = 0; i < n; i++)
{
SBITMAP_ELT_TYPE tmp = *ap++ & *bp++;
- changed = *dstp ^ tmp;
+ changed |= *dstp ^ tmp;
*dstp++ = tmp;
}
for (i = 0; i < n; i++)
{
SBITMAP_ELT_TYPE tmp = *ap++ ^ *bp++;
- changed = *dstp ^ tmp;
+ changed |= *dstp ^ tmp;
*dstp++ = tmp;
}
for (i = 0; i < n; i++)
{
SBITMAP_ELT_TYPE tmp = *ap++ | *bp++;
- changed = *dstp ^ tmp;
+ changed |= *dstp ^ tmp;
*dstp++ = tmp;
}