[EMAIL PROTECTED] wrote:
> > Well, now GCC does CSE across "asm" and will eliminate memory loads,
> > even though it may not move them! I suspect it always did CSE across
> > "asm" and we just never got hit by the bug.
>
> dummy_lock trick is equivalent to "memory" clobber.
For GCC 2.7.2 yes. For current compilers with -fstrict-aliasing, no:
the dummy_lock type doesn't alias with some other memory accesses.
Longer term the compiler may well take into account the array size.
Of course we still need the dummy_lock trick anyway.
-- Jamie
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