From: Richard Biener <richard.guenther@gmail.com>
To: Richard Biener <richard.guenther@gmail.com>,
GCC Patches <gcc-patches@gcc.gnu.org>,
richard.sandiford@arm.com
Subject: Re: Fix nb_iterations calculation in tree-vect-loop-manip.c
Date: Wed, 16 Nov 2016 13:02:00 -0000 [thread overview]
Message-ID: <CAFiYyc3=-5xFO8uX8doUo+GSxBO=k-WwphLsEb4Lv9UR_JLX+g@mail.gmail.com> (raw)
In-Reply-To: <87r36c3fi2.fsf@e105548-lin.cambridge.arm.com>
On Tue, Nov 15, 2016 at 4:54 PM, Richard Sandiford
<richard.sandiford@arm.com> wrote:
> Richard Biener <richard.guenther@gmail.com> writes:
>> On Tue, Nov 15, 2016 at 1:44 PM, Richard Sandiford
>> <richard.sandiford@arm.com> wrote:
>>> We previously stored the number of loop iterations rather
>>> than the number of latch iterations.
>>
>> So ->nb_iterations was unused without SVE? Otherwise can you please
>> add a testcase?
>
> TBH I can't remember whether we noticed this by inspection or whether
> it did manifest in the output somehow. If it did, it would have been
> an extra unnecessary iteration after complete unrolling, but usually
> a later patch would remove the iteration as dead.
Ok then.
Thanks,
Richard.
> Thanks,
> Richard
prev parent reply other threads:[~2016-11-16 13:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-15 12:45 Richard Sandiford
2016-11-15 15:20 ` Richard Biener
2016-11-15 15:55 ` Richard Sandiford
2016-11-16 13:02 ` Richard Biener [this message]
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