https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104829
--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> --- I cannot reproduce it either. The machine instruction that gives the error is lfiwzx, a power7 insn; GCC will not generate this instruction unless you are compiling for power7 or later. That is not the default of course. Building with --with-cpu=power7 does not reproduce it either. Help?