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Date: Thu, 20 Aug 2015 20:10:00 -0000
Message-ID: <CAMe9rOqw-dvcr_kiXVMp70wNav+LgC2EsMKrSJZLRtvBLZiz+A@mail.gmail.com>
Subject: Re: [PR25529] Convert (unsigned t * 2)/2 into unsigned (t & 0x7FFFFFFF)
From: "H.J. Lu" <hjl.tools@gmail.com>
To: "Hurugalawadi, Naveen" <Naveen.Hurugalawadi@caviumnetworks.com>
Cc: Richard Biener <richard.guenther@gmail.com>, 	"gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>
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On Fri, Aug 7, 2015 at 1:43 AM, Hurugalawadi, Naveen
<Naveen.Hurugalawadi@caviumnetworks.com> wrote:
> Hi,
>
>>> extend it - it should also work for non-INTEGER_CST
>>> divisors and it should work for any kind of division, not just exact_div.
>
> Please find attached the patch "pr25529.patch" that implements the pattern
> for all divisors
>
> Please review and let me know if its okay.
>
> Regression tested on AARH64 and x86_64.
>
> Thanks,
> Naveen
>
> 2015-08-07  Naveen H.S  <Naveen.Hurugalawadi@caviumnetworks.com>
>
> PR middle-end/25529
>
>         gcc/ChangeLog:
>         * match.pd (div (mult @0 @1) @1) : New simplifier.
>

This caused:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67298

-- 
H.J.