Function rustc_const_eval::interpret::intern_const_alloc_for_constprop

pub fn intern_const_alloc_for_constprop<'mir, 'tcx: 'mir, T, M: CompileTimeMachine<'mir, 'tcx, T>>(
    ecx: &mut InterpCx<'mir, 'tcx, M>,
    alloc_id: AllocId
) -> InterpResult<'tcx, ()>

Intern ret. This function assumes that ret references no other allocation.