https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114309
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- https://gcc.gnu.org/pipermail/gcc-patches/2018-November/510776.html ``` Would you please consider an error diagnostics for situations written in test4.C? Such situation is then silently ignored in profile_estimate pass: Predictions for bb 2 hot label heuristics of edge 2->4 (edge pair duplicate): 85.00% hot label heuristics of edge 2->3 (edge pair duplicate): 85.00% ```