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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug target/103771] [12 Regression] Missed vectorization under -mavx512f -mavx512vl after r12-5489 Date: Fri, 14 Jan 2022 10:18:57 +0000 [thread overview] Message-ID: <bug-103771-4-ftXLTlsgsR@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-103771-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103771 --- Comment #19 from Richard Biener <rguenth at gcc dot gnu.org> --- Ah, so the issue is missing -mavx512bw which means we end up with a AVX2 style mask for V32QImode. With -mavx512bw the code vectorizes fine. I guess ix86_get_mask_mode is too restrictive here? And indeed to build a AVX2 style mask vector from a AVX512 style mask vector we'd need to use a ?:, not a simple conversion. Unfortunately we don't support vectorizing that: t.c:10:21: note: ==> examining statement: patt_42 = patt_40 ? -1 : 0; t.c:10:21: note: vect_is_simple_use: operand x.1_14 > 255, type of def: internal t.c:10:21: note: vect_is_simple_use: vectype vector(8) <signed-boolean:1> t.c:10:21: note: vect_is_simple_use: operand -1, type of def: constant t.c:10:21: note: vect_is_simple_use: operand 0, type of def: constant t.c:8:6: missed: not vectorized: relevant stmt not supported: patt_42 = patt_40 ? -1 : 0; or maybe we need to tweak the conversion vectorization for better support of this case as noted in comment#10 ... but the code generated from that AFAIU is to produce a HImode mask, not a V32QImode one which puts the fault on ix86_get_mask_mode again.
next prev parent reply other threads:[~2022-01-14 10:18 UTC|newest] Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-12-20 8:59 [Bug target/103771] New: " wwwhhhyyy333 at gmail dot com 2021-12-20 11:45 ` [Bug target/103771] [12 Regression] " pinskia at gcc dot gnu.org 2022-01-04 15:31 ` tnfchris at gcc dot gnu.org 2022-01-05 9:00 ` crazylht at gmail dot com 2022-01-13 8:43 ` crazylht at gmail dot com 2022-01-13 9:02 ` crazylht at gmail dot com 2022-01-13 9:04 ` crazylht at gmail dot com 2022-01-13 9:28 ` rguenth at gcc dot gnu.org 2022-01-13 9:50 ` rguenth at gcc dot gnu.org 2022-01-13 10:04 ` crazylht at gmail dot com 2022-01-13 10:11 ` rsandifo at gcc dot gnu.org 2022-01-13 10:22 ` crazylht at gmail dot com 2022-01-13 10:43 ` crazylht at gmail dot com 2022-01-13 10:44 ` rguenther at suse dot de 2022-01-13 10:49 ` rguenther at suse dot de 2022-01-13 10:50 ` crazylht at gmail dot com 2022-01-13 12:40 ` crazylht at gmail dot com 2022-01-13 13:42 ` rguenther at suse dot de 2022-01-13 14:42 ` crazylht at gmail dot com 2022-01-14 9:40 ` rsandifo at gcc dot gnu.org 2022-01-14 10:18 ` rguenth at gcc dot gnu.org [this message] 2022-01-17 8:22 ` crazylht at gmail dot com 2022-01-18 8:31 ` crazylht at gmail dot com 2022-01-18 8:36 ` crazylht at gmail dot com 2022-01-18 10:44 ` rguenther at suse dot de 2022-01-18 10:49 ` pinskia at gcc dot gnu.org 2022-01-19 6:03 ` crazylht at gmail dot com 2022-01-19 6:10 ` pinskia at gcc dot gnu.org 2022-01-19 6:25 ` crazylht at gmail dot com 2022-01-19 7:44 ` rguenth at gcc dot gnu.org 2022-01-19 8:33 ` crazylht at gmail dot com 2022-01-19 8:48 ` rguenther at suse dot de 2022-01-20 8:52 ` cvs-commit at gcc dot gnu.org 2022-01-27 6:03 ` crazylht at gmail dot com 2022-02-01 5:21 ` pinskia at gcc dot gnu.org 2022-02-01 16:13 ` law at gcc dot gnu.org 2022-02-01 16:18 ` pinskia at gcc dot gnu.org 2022-02-13 9:58 ` cvs-commit at gcc dot gnu.org 2022-02-14 7:36 ` rguenth at gcc dot gnu.org 2022-02-14 7:45 ` crazylht at gmail dot com 2022-02-14 7:53 ` rguenth at gcc dot gnu.org 2022-02-17 11:01 ` cvs-commit at gcc dot gnu.org 2023-04-26 6:55 ` [Bug target/103771] [12/13/14 " rguenth at gcc dot gnu.org 2023-05-06 23:21 ` pinskia at gcc dot gnu.org 2023-05-08 7:38 ` cvs-commit at gcc dot gnu.org 2023-05-08 7:39 ` pinskia at gcc dot gnu.org
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