On Wed, Dec 30, 2009 at 11:37 PM, Jon Harrop <jon at ffconsultancy.com> wrote: > > Is it more efficient to return void rather than the int 0, e.g. does it reduce > register pressure? "ret void" and "ret i32 undef" should lead to exactly the same code on any architecture; returning zero is slightly more expensive, but shouldn't affect register pressure. -Eli