Volatile (was Re: observability)

[Felix Lee]

In <7330001 at hpfcso.HP.COM>,
   Mike McNelly <mike at hpfcso.HP.COM> writes:
> Ah, but any compiler that has optimization capabilities that would allow
> it to nullify a useless program invariably does not do such optimization
> unless you ask for it with flags such as -O.

Bad assumption.  The High C compiler (on IBM RTs) always does at least
trivial optimization.  Warnings like "Expression has no side effects"
and "Variable is never referenced" mean relevant code has disappeared.
--
Felix Lee	flee at shire.cs.psu.edu	*!psuvax1!flee