On Thu, Oct 25, 2012 at 11:21 PM, Jakub Jelinek <ja...@redhat.com> wrote: > On Thu, Oct 25, 2012 at 11:15:06PM -0700, H.J. Lu wrote: >> Should there be a -fno-ira option before reload pass is >> removed? It will be useful to investiage IRA regressions. > > You mean -fno-lra, and s/IRA/LRA/, right? I think the reason for no
Yes, I meant -fno-lra. > compiler switch is that while returning false from ix86_lra_p () > likely works right now, -fno-lra mode would be yet another > thing to support. So, for investigations just return false from ix86_lra_p, > similarly for benchmarking, but as it needs compiler source changes, it is > obvious that with old reload everybody is on their own if it breaks > for targets that switched to LRA. > I'd like to compare glibc code quality on x32, x86-64 and ia32 with and without LRA. We don't even need to document -fno-lra or we can make it -mno-lra as x86 undocumented switch. I expect -fno-lra/-mno-lra will only be useful in a short period of time. -- H.J.
