https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113878
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> --- (In reply to uecker from comment #6) > My idea would be to explicitly add either traps or __builtin_unreachable > whenever there is UB that can be checked for in the C FE, and not add > sanitizer calls (that may return). Just a lightweight tool for safety that > needs no run-time and and be activated in production because it is optimized > well. Something that traps is -fsanitize=undefined -fsanitize-trap=undefined (or selected sanitizers), that doesn't need any runtime. And it is still very costly, it isn't lightweight, and it severely prevents optimizations. Something that would add conditional __builtin_unreachable would be useless, that is already implied from the operations.
