[Bug 276104] [exp-run] Against llvm-18-update branch on GitHub

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=276104

--- Comment #132 from commit-hook@FreeBSD.org ---
A commit in branch stable/13 references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=92d4d6f1f60e5d9cb2c7e0dd5d632987e54741e8

commit 92d4d6f1f60e5d9cb2c7e0dd5d632987e54741e8
Author:     Dimitry Andric <dim@FreeBSD.org>
AuthorDate: 2024-01-02 16:07:31 +0000
Commit:     Dimitry Andric <dim@FreeBSD.org>
CommitDate: 2024-04-19 21:23:59 +0000

    Revert commit 0e46b49de433 from llvm-project (by Matt Arsenault):

      Reapply "RegisterCoalescer: Add implicit-def of super register when
coalescing SUBREG_TO_REG"

      This reverts commit c398fa009a47eb24f88383d5e911e59e70f8db86.

      PPC backend was fixed in 2f82662ce901c6666fceb9c6c5e0de216a1c9667

    Since it causes an assertion failure building /sys/dev/fb/vga.c:
    https://github.com/llvm/llvm-project/issues/76416

    PR:             276104
    MFC after:      1 month

    (cherry picked from commit edc2dc17b1f2dfe45dc85e6cc0ff54bca1ac8214)

 .../llvm/lib/CodeGen/RegisterCoalescer.cpp         | 51 ++++------------------
 1 file changed, 9 insertions(+), 42 deletions(-)

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