https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115127
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|[12/13/14/15 Regression] |[12/13/14 Regression] |passing zero to |passing zero to |__builtin_ctz() check |__builtin_ctz() check |sometimes missing since |sometimes missing since |r12-151 |r12-151 --- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Fixed on the trunk. Not sure if this should be backported or not, it results in more code to be rejected/diagnosed than before, so might not be desirable on release branches.