On Fri, Jan 30, 2015 at 09:45:26AM -0800, Mike Stump wrote:
> I have a port that has:
>
> (insn 47 46 48 18 (parallel [
> (unspec_volatile:DI [
> (const_int 128 [0x80])
> (const_int 6 [0x6])
> ] UNSPECV_SPECIAL_OP)
> (set (mem/v:BLK (scratch:DI) [0 A8])
> (unspec:BLK [
> (mem/v:BLK (scratch:DI) [0 A8])
> ] UNSPEC_MEMORY_BARRIER))
Why don't you just (clobber (mem/v:BLK (scratch:DI))) instead
of the second set in the parallel? The instruction is already
UNSPEC_VOLATILE, and to make the barrier effect clear a clobber should be
sufficient.
Jakub
