https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78246
--- Comment #1 from Zoltan Hidvegi <zoltan at hidvegi dot com> --- Created attachment 39986 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39986&action=edit gcc -O2 -S -Wall warning_test.C gives incorrect warning: variable ‘sm’ set but not used
