Core2 and Corei7 tuning patches for review

[H.J. Lu]

On Tue, Oct 19, 2010 at 4:21 AM, Maxim Kuvyrkov <maxim@codesourcery.com> wrote:
> I'll be posting Core2 and Corei7 tuning patches in this thread for review.
>
> Last week I posted benchmark results and analysis which show impact of
> individual changes on the performance [*].  In this thread I'll be asking
> for review of some of those patches that positively affect performance.
>
> [*] http://gcc.gnu.org/ml/gcc-patches/2010-10/msg01318.html
>

Did you run SPEC CPU 2006 on 64bit Core i7? It failed to compile 400.perlbench:

gcc -c -o pp_hot.o -DSPEC_CPU -DNDEBUG -DPERL_CORE  -O3 -funroll-loops
-ffast-math -mtune=corei7       -DSPEC_CPU_LP64  -DSPEC_CPU_LINUX_X64
-fno-strict-aliasing       perly.c
perly.c: In function 'Perl_yyparse':
perly.c:2531:1: internal compiler error: in
core2_first_cycle_multipass_issue, at config/i386/i386.c:21775
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
specmake[1]: *** [perly.o] Error 1
specmake[1]: *** Waiting for unfinished jobs....

-- 
H.J.