https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104869
rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED Assignee|unassigned at gcc dot gnu.org |rsandifo at gcc dot gnu.org --- Comment #4 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> --- Mine. The problem is in function_info::make_use_available, which doesn't cope correctly with cases in which the start of the BB comes “between” two clobbers (in an RPO sense).