[Bug tree-optimization/29333] Jump threading getting in the way of PHI-OPT

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29333

--- Comment #7 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-01-23 10:25:20 UTC ---
(In reply to comment #6)
> (In reply to comment #5)
> > This is the patch which I am testing:
> 
> I Have a slightly different one since we should do a few more things before the
> mergephi and also we ccannot remove the first mergephi as that causes vpr to
> lose some optimizations.

I think it makes sense to do mergephi before phiopt.  mergephi should not
be required for VRP - can you file a bug with a testcase?