https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83213
--- Comment #3 from David Binderman <dcb314 at hotmail dot com> --- Created attachment 42749 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42749&action=edit C source code After 12 hours reducing, this is what I got. I think creduce isn't very fast, in some cases.