On Wed, May 04, 2016 at 12:11:04PM +0200, Bernd Schmidt wrote: > Given how many latent bugs it has shown up I think that alone would make > it valuable to have enabled at -O2.
It is finding so many latent bugs simply because it is changing register allocation so much, and very aggressively. That does not mean enabling it by default is a good thing, quite the opposite, if there is no performance (or code size, etc.) advantage to doing so. Segher