https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84210
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2018-02-05 Ever confirmed|0 |1 --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- Confirmed. Note that I'm not sure it makes no sense - it just means the function has no side-effect besides not returning ;) lib/ubsan.c is from the kernel I guess where you "copy" the attributes from sanitizer.def? GCC internally could also use "no vops" but you couldn't replicate that. Not sure if it is/was important to have the function 'const'.