https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87949
--- Comment #2 from Michael Meissner <meissner at gcc dot gnu.org> --- Created attachment 44981 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44981&action=edit Bzip2 assembly file from the fortran source In the assembly file, at line 1262, there is a store from a MFCR instruction to save a CR register, and on line 1381 there is a load and a MTCRF instruction to restore it.