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'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
