The Mitsubishi D10V version of as has a few machine
dependent options.
as will attempt to optimize its output by detecting when
instructions can be executed in parallel.
as will sometimes swap the
order of instructions. Normally this generates a warning. When this option
is used, no warning will be generated when instructions are swapped.
as packs adjacent short instructions into a single packed
instruction. --no-gstabs-packing turns instruction packing off if
--gstabs is specified as well; --gstabs-packing (the
default) turns instruction packing on even when --gstabs is
specified.