https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59124
--- Comment #9 from Alexander Peslyak <solar-gcc at openwall dot com> --- (In reply to Alexander Peslyak from comment #8) > $ gcc -S -Wall -O2 -funroll-loops testcase.c > testcase.c: In function 'DES_std_set_key': > testcase.c:14:17: warning: array subscript is above array bounds With GCC 5.0.0 20150215, this warning is gone. I also confirm that Dmitry's comment #2 warning is gone. The original one from this bug's description remains.