egcs 1.1b and "volatile"

[Jeffrey A Law]

  In message < 3637A2D7.3B01A550@utoronto.ca >you write:
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  > Is there some way to guarantee that a volatile variable will remain
  > volatile regardless of optimization level?  This is critical when
  > writing a device driver that modifies CPU memory. eg. i82596.
A load to or store from a volatile variable can never be deleted regardless
of the optimization level.

jeff