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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug target/101846] Improve __builtin_shufflevector emitted code Date: Wed, 15 Dec 2021 01:50:08 +0000 [thread overview] Message-ID: <bug-101846-4-qBzuWjKb83@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-101846-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101846 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Severity|normal |enhancement --- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> --- With just -mavx512f we produce a bunch of instructions (looking like we went to scalar mode) while LLVM is able to produce: foo(short __vector(16)): # @foo(short __vector(16)) .cfi_startproc # %bb.0: vpmovzxwd ymm1, xmm0 # ymm1 = xmm0[0],zero,xmm0[1],zero,xmm0[2],zero,xmm0[3],zero,xmm0[4],zero,xmm0[5],zero,xmm0[6],zero,xmm0[7],zero vextracti128 xmm0, ymm0, 1 vpmovzxwd ymm0, xmm0 # ymm0 = xmm0[0],zero,xmm0[1],zero,xmm0[2],zero,xmm0[3],zero,xmm0[4],zero,xmm0[5],zero,xmm0[6],zero,xmm0[7],zero vinserti64x4 zmm0, zmm1, ymm0, 1 ret bar(short __vector(32)): # @bar(short __vector(32)) .cfi_startproc # %bb.0: vpmovdw ymm0, zmm0 ret For -march=skylake512 we do produce now: foo(short __vector(16)): vpmovzxwd zmm0, ymm0 ret bar(short __vector(32)): vpmovdw ymm0, zmm0 ret So still confirmed for the -mavx512f case.
next prev parent reply other threads:[~2021-12-15 1:50 UTC|newest] Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-08-10 13:14 [Bug target/101846] New: " jakub at gcc dot gnu.org 2021-08-10 14:30 ` [Bug target/101846] " rguenth at gcc dot gnu.org 2021-08-11 3:35 ` crazylht at gmail dot com 2021-08-12 1:53 ` crazylht at gmail dot com 2021-08-12 1:55 ` crazylht at gmail dot com 2021-08-12 6:03 ` cvs-commit at gcc dot gnu.org 2021-08-16 7:30 ` cvs-commit at gcc dot gnu.org 2021-12-15 1:50 ` pinskia at gcc dot gnu.org [this message] 2021-12-15 1:52 ` pinskia at gcc dot gnu.org 2021-12-15 3:25 ` crazylht at gmail dot com 2021-12-15 11:26 ` jakub at gcc dot gnu.org
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