https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85246
--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> --- (In reply to Tom de Vries from comment #1) > I went through a couple of cycles of minimizing the failure, seeing > something suspicious, modifying by hand or writing a tentative patch, but > every time I went back to the original non-minimized example I got the > failure again. > > Anyway, things that may be causing this fail: > > 1. > > The og7 fix for PR85204 introduces a unified jump (bra.uni) for a jump > conditional consisting of a test for vector id == 0 && worker id == 0. The > fact that we're going a different direction in worker id 0 for vector id 0 > and vector id 1 means the branch diverges, and is _not_ unified. It seems > prudent to fix this by reverting the og7 fix and backporting the trunk fix. Fixed here: https://gcc.gnu.org/ml/gcc-patches/2018-04/msg00525.html
