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From: "juzhe.zhong at rivai dot ai" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/110751] RISC-V: Suport undefined value that allows VSETVL PASS use TA/MA
Date: Tue, 12 Sep 2023 22:44:54 +0000	[thread overview]
Message-ID: <bug-110751-4-aKNbGN24Vq@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-110751-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110751

--- Comment #30 from JuzheZhong <juzhe.zhong at rivai dot ai> ---
Hi.Richard.

I understand your conern:

If we are possible have this following possible rule to fold to ELSE value in
the future:

1. (cond_len all-false a b c len bias)
2. (cond_len any mask a b c len bias) (len + bias == 0)


I think it also can be easily fixed in the backend by ELSE_VALUE targethook.

We can return scalar 0 for else value only if (ops[0] != all false mask &&
LEN+BIAS ！= 0).

Am I right?

Thanks.

  parent reply	other threads:[~2023-09-12 22:44 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-07-20  9:03 [Bug target/110751] New: " xuli1 at eswincomputing dot com
2023-07-20  9:10 ` [Bug target/110751] " juzhe.zhong at rivai dot ai
2023-07-20  9:30 ` rguenth at gcc dot gnu.org
2023-07-20  9:37 ` rguenth at gcc dot gnu.org
2023-07-20  9:58 ` kito at gcc dot gnu.org
2023-07-20 11:28 ` rguenther at suse dot de
2023-07-20 11:43 ` juzhe.zhong at rivai dot ai
2023-07-20 12:00 ` juzhe.zhong at rivai dot ai
2023-07-20 12:35 ` rguenther at suse dot de
2023-07-20 12:42 ` juzhe.zhong at rivai dot ai
2023-07-20 12:45 ` rguenther at suse dot de
2023-07-20 12:50 ` juzhe.zhong at rivai dot ai
2023-07-20 12:56 ` rguenther at suse dot de
2023-07-20 13:29 ` rsandifo at gcc dot gnu.org
2023-07-20 13:32 ` rguenther at suse dot de
2023-07-20 22:03 ` juzhe.zhong at rivai dot ai
2023-07-21  1:53 ` xuli1 at eswincomputing dot com
2023-07-21  6:17 ` rguenth at gcc dot gnu.org
2023-07-21 12:47 ` rsandifo at gcc dot gnu.org
2023-07-21 12:53 ` rguenth at gcc dot gnu.org
2023-07-21 13:23 ` rsandifo at gcc dot gnu.org
2023-07-24  6:20 ` rguenther at suse dot de
2023-07-25  7:05 ` juzhe.zhong at rivai dot ai
2023-09-12 11:44 ` juzhe.zhong at rivai dot ai
2023-09-12 14:24 ` rsandifo at gcc dot gnu.org
2023-09-12 14:53 ` juzhe.zhong at rivai dot ai
2023-09-12 15:59 ` rsandifo at gcc dot gnu.org
2023-09-12 16:21 ` juzhe.zhong at rivai dot ai
2023-09-12 16:27 ` juzhe.zhong at rivai dot ai
2023-09-12 16:31 ` juzhe.zhong at rivai dot ai
2023-09-12 22:44 ` juzhe.zhong at rivai dot ai [this message]
2023-09-13  7:56 ` rguenth at gcc dot gnu.org
2023-09-13  8:34 ` juzhe.zhong at rivai dot ai
2023-09-13  8:39 ` juzhe.zhong at rivai dot ai
2023-09-13  9:38 ` rguenth at gcc dot gnu.org
2023-09-13  9:39 ` rguenth at gcc dot gnu.org
2023-09-13  9:48 ` juzhe.zhong at rivai dot ai
2023-09-13  9:48 ` juzhe.zhong at rivai dot ai
2023-09-13 10:15 ` rguenther at suse dot de
2023-09-13 22:39 ` rsandifo at gcc dot gnu.org
2023-09-14  8:53 ` juzhe.zhong at rivai dot ai
2023-09-14  9:15 ` richard.sandiford at arm dot com
2023-09-20 16:27 ` cvs-commit at gcc dot gnu.org
2023-09-21  9:13 ` cvs-commit at gcc dot gnu.org
2023-09-21  9:28 ` juzhe.zhong at rivai dot ai
2023-09-22  7:31 ` xuli1 at eswincomputing dot com
2023-09-22  7:33 ` xuli1 at eswincomputing dot com

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