https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91459
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Last reconfirmed|2019-08-16 00:00:00 |2021-12-26 --- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> --- So when DOM3 changes: result_5 = function_returns_only_1_or_doesnt_return (a_2(D), b_3(D)); if (result_5 == 1) goto <bb 3>; [100.00%] else goto <bb 4>; [0.00%] <bb 3> [local count: 1073741824]: return 1; <bb 4> [count: 0]: __builtin_unreachable (); To result_5 = function_returns_only_1_or_doesnt_return (a_2(D), b_3(D)); return 1; I wonder if it could change 1 back into result_5 because it comes from a function call.