Re: [patch] measurements, numbers about CONFIG_OPTIMIZE_INLINING=y impact

Richard Guenther
2009-01-09T19:33:18Z

On Fri, Jan 9, 2009 at 8:40 PM, Andi Kleen <andi@firstfloor.org> wrote:
> On Fri, Jan 09, 2009 at 08:10:20PM +0100, Richard Guenther wrote:
>> On Fri, Jan 9, 2009 at 8:21 PM, Andi Kleen <andi@firstfloor.org> wrote:
>> >> GCC 4.3 should be good in compiling the
>> >> kernel with default -Os settings.
>> >
>> > It's unfortunately not. It doesn't inline a lot of simple asm() inlines
>> > for example.
>>
>> Reading Ingos posting with the actual numbers states the opposite.
>
> Hugh had some numbers upto 4.4.0 20090102 in
>
> http://thread.gmane.org/gmane.linux.kernel/775254/focus=777231
>
> which demonstrated the problem.

How about GCC bugzillas with testcases that we can fix and enter into the
testsuite to make sure future GCC versions won't regress?

Richard.