https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79793
--- Comment #16 from H.J. Lu <hjl.tools at gmail dot com> --- The problem is in create_cie_data: /* On entry, the Canonical Frame Address is at SP. */ memset (&loc, 0, sizeof (loc)); loc.reg = dw_stack_pointer_regnum; loc.offset = INCOMING_FRAME_SP_OFFSET; def_cfa_1 (&loc); We lost the function type info with LTO.