[PATCH 0/5] some combine patches

[Segher Boessenkool]

On Sun, Nov 16, 2014 at 05:45:06PM +0900, Oleg Endo wrote:
> When you commit those, could you please also add PR 59278 to the ChangeLog so
> that the commit appears in bugzilla?  After your patches are in, I'd like to
> add some SH specific test cases (assuming that your patches fix PR 59278).

It doesn't fix this testcase.  Here, recog_for_combine needs to add a
clobber of T, but it thinks T is not dead.  It doesn't say anything
about that in the debug dump :-(

Maybe the movrt_negc pattern shouldn't set T at all, just clobber it?
Or reg_dead_at_p can be taught about "unused" notes.


Segher