On Tue, 2006-05-09 at 22:16, Richard Kenner wrote:
> Can there be two consecutive insns that use cc0 after cc0 is set?
>
> No.
Yes. But only very very late in the compilation, once all normal
re-ordering and optimization has been completed. I think it's probably
final that folds out
set cc0 (compare (x y))
condjump1
set cc0 (compare (x y))
condjump2
and converts it to
set cc0 (compare (x y))
condjump1
condjump2
But it only does this if the backend has support for describing which
insns set cc0 implicitly.
R.
