Is it possible that gcc reorders a series of read/write operations?

[Pan ruochen]

> GCC shouldn't reorder the operations because you have them declared as
> 'volatile', however I have a MIPS CPU where the hardware writeback buffer
> seems to do reordering...
>
> David Daney
>

Can volatile do this? I thought volatile just forced GCC to read the
memory location each time rather than cahed the value in a register.
And I am interested in the details how your MIPS CPU hardware
reordered instructions.

Best Regard
-----------------
PRC
Sep 4, 2008