I wrote a lengthy reply from work this morning, but it 
has never shown up on the list.

> When the code is re-written to actually say what you mean, do you still 
> get a difference?

Saying:

a_volatile = b_volatile = c;

produced exactly the same object code as:

b_volatile = c;  a_volatile = b_volatile;

Problem remained the same, compiled with 3.4.5
the code works, with 4.1.1 it did not.


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