https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70686
--- Comment #4 from alekshs at hotmail dot com --- I would be somewhat understanding in the context of -O2/-O3 (compiler guessing) but not in the context of PGO (compiler understands the flow after a run - so it should be able to understand that these IFs can't possible be an obstacle for packed math... or that is my rationale anyway which may be totally irrelevant with how these things should be done, cost/reward schemes of implementing such changes, etc etc).