From: Jakub Jelinek <jakub@redhat.com>
To: Jonathan Wakely <jwakely@redhat.com>
Cc: Richard Biener <rguenther@suse.de>,
Tamar Christina <Tamar.Christina@arm.com>,
"gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>,
nd <nd@arm.com>
Subject: Re: [PATCH] middle-end: fix de-optimizations with bitclear patterns on signed values
Date: Tue, 26 Oct 2021 21:39:53 +0200 [thread overview]
Message-ID: <20211026193953.GC304296@tucnak> (raw)
In-Reply-To: <CACb0b4=cRxjB3x_mT6Qd31Rouejm2fZnQZLGNvL7xbCDcUOmqA@mail.gmail.com>
On Tue, Oct 26, 2021 at 08:35:40PM +0100, Jonathan Wakely wrote:
> We can change __cmp_cat::type if that would result in better code. I picked
> signed char because we only need two bits, and preferably have a signed
> type as it simplifies some things. Would int make more sense? Or int:2 ?
I think signed char is fine (and changing it would be an ABI change), int is
unnecessarily large and int:2 would be certainly slower (and harder).
Jakub
next prev parent reply other threads:[~2021-10-26 19:40 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-15 11:08 Tamar Christina
2021-10-15 11:30 ` Richard Biener
2021-10-25 14:26 ` Tamar Christina
2021-10-26 8:26 ` Richard Biener
2021-10-26 8:35 ` Tamar Christina
2021-10-26 8:45 ` Richard Biener
2021-10-26 12:10 ` Tamar Christina
2021-10-26 13:13 ` Richard Biener
2021-10-26 13:20 ` Jakub Jelinek
2021-10-26 13:21 ` Richard Biener
2021-10-26 13:36 ` Jakub Jelinek
2021-10-26 13:38 ` Richard Biener
2021-10-26 19:35 ` Jonathan Wakely
2021-10-26 19:39 ` Jakub Jelinek [this message]
2021-10-26 19:50 ` Jonathan Wakely
2021-11-03 10:56 ` Tamar Christina
2021-11-03 14:20 ` Jakub Jelinek
2021-11-04 12:19 ` Tamar Christina
2021-11-04 15:10 ` Jakub Jelinek
2021-11-12 7:30 ` Tamar Christina
2021-11-19 8:52 ` Tamar Christina
2021-11-19 11:19 ` Jakub Jelinek
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