On Thu, May 15, 2014 at 1:46 PM, Ian Bolton <ian.bol...@arm.com> wrote: > Hi, fellow GCC developers! > > I was wondering if the "gcc" driver could be made to invoke > "cc1" twice, with different flags, and then just keep the > better of the two .s files that comes out?
I'd be interested in your .s comparison tool that decides which one is better! Richard. > I'm sure this is not a new idea, but I'm not aware of > anything being done in this area, so I've made this post to > gather your views. :) > > The kinds of flags I am thinking could be toggled are > register allocation and instruction scheduling ones, since > it's very hard to find one-size-fits-all there and we don't > really want to have the user depend on knowing the right > one. > > Obviously, compilation time will go up, but the run-time > benefits could be huge. > > What are your thoughts? What work in this area have I > failed to dig up in my limited research? > > Many thanks, > Ian > > > >
