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Re: GCC missing -flto optimizations? SPEC lbm benchmark

From: Ramana Radhakrishnan <ramana dot gcc at googlemail dot com>
To: Jakub Jelinek <jakub at redhat dot com>
Cc: Richard Biener <richard dot guenther at gmail dot com>, gcc mailing list <gcc at gcc dot gnu dot org>, Hi-Angel <hiangel999 at gmail dot com>, Jun Ma <majun4950646 at gmail dot com>, "Bin.Cheng" <amker dot cheng at gmail dot com>, Steve Ellcey <sellcey at marvell dot com>
Date: Fri, 15 Feb 2019 13:33:59 +0000
Subject: Re: GCC missing -flto optimizations? SPEC lbm benchmark
References: <92bfe075168981ee45e525875ac6a15f5e318034.camel@marvell.com> <CAHFci2_tSRtnA38KJjG+kWDDh387NGvY2owyUrmfZjS03def0Q@mail.gmail.com> <CABT63J4+=ihYHkEWy6aZwawYu5Z6Y4wErCmZVLkzLBLv3tVE9w@mail.gmail.com> <CAHGDjgB+jtuum0u7RF5-BeamO+hAsUvSyiXdsPKEmJBLaZQb_Q@mail.gmail.com> <2FB9C3FE-1EE5-414E-8425-1B84493E16DF@gmail.com> <20190215131537.GT2135@tucnak>

On Fri, Feb 15, 2019 at 1:16 PM Jakub Jelinek <jakub@redhat.com> wrote:
>
> On Fri, Feb 15, 2019 at 02:12:27PM +0100, Richard Biener wrote:
> > On February 15, 2019 1:45:10 PM GMT+01:00, Hi-Angel <hiangel999@gmail.com> wrote:
> > >I never could understand, why field reordering was removed from GCC?
> >
> > The implementation simply was seriously broken, bitrotten and unmaintained.
>
> Which of course doesn't mean somebody else can't submit a new
> implementation, as long as it would be properly maintained and would avoid
> the issues the old implementation had.  Just it is better not to have it if
> it causes lots of wrong-code issues and there is nobody to fix those.

I also remember a cauldron talk in the recent past about this. It was in Prague.
Ah , here's a youtube video of it. :

https://www.youtube.com/watch?v=vhV75sys0Nw



Ramana



>
>         Jakub

References:
- GCC missing -flto optimizations? SPEC lbm benchmark
  - From: Steve Ellcey
- Re: GCC missing -flto optimizations? SPEC lbm benchmark
  - From: Bin.Cheng
- Re: GCC missing -flto optimizations? SPEC lbm benchmark
  - From: Jun Ma
- Re: GCC missing -flto optimizations? SPEC lbm benchmark
  - From: Hi-Angel
- Re: GCC missing -flto optimizations? SPEC lbm benchmark
  - From: Richard Biener
- Re: GCC missing -flto optimizations? SPEC lbm benchmark
  - From: Jakub Jelinek

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