+ vallen = canonize (val, (uvlen + 1) >> 1, prec); + + /* Shift is not always safe to write over one of the + operands, so we must copy. */ + HOST_WIDE_INT tval[2 * WIDE_INT_MAX_ELTS]; + memcpy (tval, val, vallen * CHAR_BIT / HOST_BITS_PER_WIDE_INT);
I could special case this, but the old code was not correct for odd precisions.vallen * sizeof (HOST_WIDE_INT) would be more typical. But why not unpack into tval directly and avoid the copy?