On Thu, Mar 13, 2014 at 10:42 PM, Simon Marlow <marlowsd@gmail.com> wrote:

Oh I see, sorry for misunderstanding.  In that case it's a straightforward code size / speed tradeoff.  When a similar case came up recently (PAP optimisations) I turned it on for -O2 only.  Someday I'd really like to have a -Os that would allow us a bit more control over decisions like this.