From: Marc Glisse <marc.glisse@inria.fr>
To: Richard Biener <richard.guenther@gmail.com>
Cc: Jeff Law <law@redhat.com>, gcc-patches <gcc-patches@gcc.gnu.org>
Subject: Re: [PATCH][RFA][PR tree-optimization/79095] Improve overflow test optimization and avoid invalid warnings
Date: Fri, 27 Jan 2017 09:03:00 -0000 [thread overview]
Message-ID: <alpine.DEB.2.20.1701270946460.1750@stedding.saclay.inria.fr> (raw)
In-Reply-To: <CAFiYyc2C016TFjeu+MWQ+iDnZKsP_FaOad-pcHDDc_hm7AnDQA@mail.gmail.com>
On Thu, 26 Jan 2017, Richard Biener wrote:
> I also notice we dont' handle 1 - A CMP A anywhere.
Hmm, what are we supposed to transform that into? For ==, that would be
false (parity), but for < it is false for 0, true for 1, false for 2, then
true again after MAX/2... Nothing obvious.
--
Marc Glisse
prev parent reply other threads:[~2017-01-27 8:52 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-26 1:03 Jeff Law
2017-01-26 7:38 ` Marc Glisse
2017-01-26 15:57 ` Jeff Law
2017-01-27 9:13 ` Marc Glisse
2017-01-27 12:10 ` Richard Biener
2017-01-27 19:20 ` Jeff Law
2017-01-27 22:02 ` Richard Biener
2017-01-27 22:10 ` Jeff Law
2017-01-27 22:29 ` Jeff Law
2017-01-30 9:55 ` Richard Biener
2017-01-30 18:08 ` Jeff Law
2017-01-30 19:53 ` Richard Biener
2017-01-27 22:36 ` Andrew Pinski
2017-01-26 18:32 ` Jeff Law
2017-01-26 10:00 ` Richard Biener
2017-01-26 16:09 ` Jeff Law
2017-01-27 9:03 ` Marc Glisse [this message]
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