http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60438
--- Comment #9 from linzj <manjian2006 at gmail dot com> --- I have tried to modify i386.c to make ix86_force_to_memory&ix86_free_from_memory to generate frame related insn.That causes another problem.Seems the only way to go is have a look at jump2. The another problem: ARGS_SIZE 12 .cfa_offset 12 push xxx .cfa_offset 16 ... ARGS_SIZE 0 .cfa_offset 4 see?There is an orphan 4!