The JVM is likely to in-line dummy, realize it does nothing and then coalesce your other code.
It isn't any wonder that this produces the same results. On Wed, Nov 16, 2011 at 5:28 AM, Gilles Sadowski < gil...@harfang.homelinux.org> wrote: > Besides > x + delta - x > being strange-looking and running the risk of being manually (and > incorrectly) changed to just > delta > the reference (not) cited above suggests to use a two- or three-steps > procedure to ensure that some optimizing compiler will not do the same: > ---CUT--- > double sum = x + delta; > dummy(sum); // function "dummy" does nothing. > delta = sum - x; > ---CUT--- >
