[PATCH] C undefined behavior fix

[dewar@gnat.com]

<<I think the goal and intent, for Ada and C as well, is to say that the
compiler will generate what is possible from assembly code written by
an expert on the platform, using the best fitting access that is
possible.
>>

Ah ha! But then look again  at my 16-bit example, an expert assembly
langauge programmer will use a 32 bit load if efficiency is not an
issue (and it does not matter if there are extra bits around), but
a 16-bit load if the hardware for some reason requires it. How is
the poort C compiler to distinguish these cases automatically?