This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: Patch to fix gcc.c-torture/compile/20010102-1.c on IA64 HP-UX


On Fri, Oct 3, 2008 at 5:40 PM, Jeff Law <law@redhat.com> wrote:
> I'd be hard pressed to see how this patch could cause any kind of
> performance regression since it's merely propagating information to the
> backend that was getting lost in regrename and I don't see that the ppc uses
> REG_POINTER in its backend.

PPC does not use it but the way lwx is used is [base+index] which
should really be done that way, otherwise it will have some stalls in
some cases (on Power 6).

Thanks,
Andrew Pinski


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]