[Bug 264394] Several ports can't build with CPUTYPE?=skylake-avx512 or CPUTYPE?=tigerlake - eat 1 CPU core forever

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From: <bugzilla-noreply_at_freebsd.org>
Date: Sat, 04 Jun 2022 11:45:10 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264394

--- Comment #10 from commit-hook@FreeBSD.org ---
A commit in branch stable/12 references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=e5896578b22271be25f18996033a176fc6cdfe19

commit e5896578b22271be25f18996033a176fc6cdfe19
Author:     Dimitry Andric <dim@FreeBSD.org>
AuthorDate: 2022-06-01 21:43:18 +0000
Commit:     Dimitry Andric <dim@FreeBSD.org>
CommitDate: 2022-06-04 11:44:33 +0000

    Apply llvm fix for possible hangs with CPUTYPE=skylake-avx512

    Merge commit e8305c0b8f49 from llvm git (by Simon Pilgrim)

        [X86] combineX86ShuffleChain - don't fold to truncate(concat(V1,V2)) if
it was already a PACK op

        Fixes #55050

    PR:             264394
    Reported by:    VVD <vvd@unislabs.com>
    MFC after:      3 days

    (cherry picked from commit 592e876a422960a78938caa714f2263ff38eb87b)

 contrib/llvm-project/llvm/lib/Target/X86/X86ISelLowering.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

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