On 08/28/2017 02:24 PM, Richard Biener wrote:
> On Fri, Aug 25, 2017 at 9:51 PM, Jeff Law wrote:
>> On 07/31/2017 01:47 AM, Martin Liška wrote:
>>> I would like to ping this. Input from other people will be appreciated ;)
>> I think the thing to keep in mind here is that IIUC this only affects
>>
On Fri, Aug 25, 2017 at 9:51 PM, Jeff Law wrote:
> On 07/31/2017 01:47 AM, Martin Liška wrote:
>> I would like to ping this. Input from other people will be appreciated ;)
> I think the thing to keep in mind here is that IIUC this only affects
> things when we've configured using the --with-stage1
On 07/31/2017 01:47 AM, Martin Liška wrote:
> I would like to ping this. Input from other people will be appreciated ;)
I think the thing to keep in mind here is that IIUC this only affects
things when we've configured using the --with-stage1-cflags option.
So questions about is -O1 more stable th
I would like to ping this. Input from other people will be appreciated ;)
Thanks,
Martin
On 06/19/2017 02:30 PM, Richard Biener wrote:
> On Mon, Jun 19, 2017 at 12:51 PM, Martin Liška wrote:
>> PING^1
>>
>> Richi are you fine with the suggested change? I basically followed your
>> advises :)
>
On Mon, Jun 19, 2017 at 12:51 PM, Martin Liška wrote:
> PING^1
>
> Richi are you fine with the suggested change? I basically followed your
> advises :)
Well, I am but as Eric disagrees I think we need input from other
people on this.
I'm comfortably setting STAGE1_CFLAGS here.
Richard.
> Marti
PING^1
Richi are you fine with the suggested change? I basically followed your advises
:)
Martin
On 05/26/2017 03:00 PM, Martin Liška wrote:
> On 05/26/2017 01:55 PM, Richard Biener wrote:
>> On Fri, May 26, 2017 at 1:51 PM, Jakub Jelinek wrote:
>>> On Fri, May 26, 2017 at 01:46:47PM +0200, Ri
> That's why we decided to enable -O2 just with GCC 4.8+.
IMO it's too dangerous on non-x86 platforms and -O1 would be much safer.
--
Eric Botcazou
On 05/30/2017 11:43 AM, Eric Botcazou wrote:
>> Are you sure? In my experience -O2 gets the most test coverage during
>> lifetime of a particular release.
>
> Yes, some older GCC releases have aliasing issues that are exposed at -O2
> only
> because of -fstrict-aliasing and -fschedule-insns.
>
> Are you sure? In my experience -O2 gets the most test coverage during
> lifetime of a particular release.
Yes, some older GCC releases have aliasing issues that are exposed at -O2 only
because of -fstrict-aliasing and -fschedule-insns.
--
Eric Botcazou
On Mon, May 29, 2017 at 1:13 PM, Eric Botcazou wrote:
>> After a discussion with Richi, using adding "-O2" to STAGE1 cflags with a
>> recent enough compiler can significantly speed up bootstrap. Thus I'm
>> suggesting to introduce --with-stage1-cflags where one can provide such
>> options.
>
> -O1
> After a discussion with Richi, using adding "-O2" to STAGE1 cflags with a
> recent enough compiler can significantly speed up bootstrap. Thus I'm
> suggesting to introduce --with-stage1-cflags where one can provide such
> options.
-O1 is sufficient in my experience and far less risky than -O2 in
On 05/26/2017 03:00 PM, Martin Liška wrote:
> Ok, sending new patch that does that on experimental branches for ${CC}
> --version
> being a GCC newer than 4.9.
s/4.9/4.8/
On 05/26/2017 01:55 PM, Richard Biener wrote:
> On Fri, May 26, 2017 at 1:51 PM, Jakub Jelinek wrote:
>> On Fri, May 26, 2017 at 01:46:47PM +0200, Richard Biener wrote:
>>> On Thu, May 25, 2017 at 11:23 AM, Martin Liška wrote:
Hello.
After a discussion with Richi, using adding "-O2
On Fri, May 26, 2017 at 1:51 PM, Jakub Jelinek wrote:
> On Fri, May 26, 2017 at 01:46:47PM +0200, Richard Biener wrote:
>> On Thu, May 25, 2017 at 11:23 AM, Martin Liška wrote:
>> > Hello.
>> >
>> > After a discussion with Richi, using adding "-O2" to STAGE1 cflags with a
>> > recent
>> > enough
On Fri, May 26, 2017 at 01:46:47PM +0200, Richard Biener wrote:
> On Thu, May 25, 2017 at 11:23 AM, Martin Liška wrote:
> > Hello.
> >
> > After a discussion with Richi, using adding "-O2" to STAGE1 cflags with a
> > recent
> > enough compiler can significantly speed up bootstrap. Thus I'm sugges
On Thu, May 25, 2017 at 11:23 AM, Martin Liška wrote:
> Hello.
>
> After a discussion with Richi, using adding "-O2" to STAGE1 cflags with a
> recent
> enough compiler can significantly speed up bootstrap. Thus I'm suggesting to
> introduce --with-stage1-cflags where one can provide such options.
Hello.
After a discussion with Richi, using adding "-O2" to STAGE1 cflags with a recent
enough compiler can significantly speed up bootstrap. Thus I'm suggesting to
introduce --with-stage1-cflags where one can provide such options.
Apart from that, maybe it would be handy to automatically enable
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