On October 28, 2017 9:28:38 AM GMT+02:00, Jeff Law <l...@redhat.com> wrote: > >Jan, > >What's the purpose behind calling vrp_meet and >extract_range_from_unary_expr from within the IPA passes? > >AFAICT that is not safe to do. Various paths through those routines >will access static objects within tree-vrp.c which may not be >initialized when IPA runs (vrp_equiv_obstack, vr_value). > >While this seems to be working today, it's a failure waiting to happen.
Those functions are fine to use IIRC. >Is there any way you can avoid using those routines? I can't believe >you really need all the complexity of those routines, particularly >extract_range_from_unary_expr. Plus it's just downright fugly from a >modularity standpoint. The functions were designed to be workers for ranges like const_binop so they were supposed to be used elsewhere. Which is also why I wondered Andrew didn't use them... Richard. > >? > >Jeff
