* sh.c (max_labelno_before_reorg): New variable.
(sh_reorg): Initialize it.
(find_barrier): Check max_labelno_before_reorg before using
label_to_alignment. Take length of explicit alignment insns
into account. When seeing a UNSPECV_CONST_END, return it.
* sh.c (fixup_mova): Set mode of affected label to QImode.
(untangle_mova): New function.
(find_barrier): Use it. Check mode of label before decrementing
num_mova.
(sh_reorg): Likewise.
Set mode of all insns back to VOIDmode.
* sh.c (MOVA_LABELREF): New macro.
(mova_p, fixup_mova, sh_reorg): Use it.
(find_barrier, sh_reorg): Don't count num_mova back to 0 unless
ADDR_DIFF_VEC matches mova.
From-SVN: r112173
