“4a3387963583eccad4fa254aa414bc27486fc025”上不存在“paddle/phi/kernels/cpu/fold_grad_kernel.cc”
* wip * clean up * should fix running with memopt * add ut * mark lr schedule op role * hide lr_schedule_guard * use op_role_var instead of ufind * unify dist test name * wip for py3 support * fix var deref * fix python3 mem_opt order * remove comments