[Bug 271047] [exp-run] Against llvm-16-update branch on GitHub

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=271047

--- Comment #92 from commit-hook@FreeBSD.org ---
A commit in branch main references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=881fc203567e85648f2f591a75c4674be2bee0ed

commit 881fc203567e85648f2f591a75c4674be2bee0ed
Author:     Dimitry Andric <dim@FreeBSD.org>
AuthorDate: 2023-07-16 18:45:29 +0000
Commit:     Dimitry Andric <dim@FreeBSD.org>
CommitDate: 2023-07-16 18:45:29 +0000

    Merge commit 8757ce490130 from llvm-project (by Simon Pilgrim):

        [PowerPC] Replace PPCISD::VABSD cases with generic ISD::ABDU(X,Y) node

        A move towards using the generic ISD::ABDU nodes on more backends

        Also support ISD::ABDS for v4i32 types using the existing signbit flip
trick

        PowerPC has a select(icmp_ugt(x,y),sub(x,y),sub(y,x)) -> abdu(x,y)
combine that I intend to move to DAGCombiner in a future patch.

        The ABS(SUB(X,Y)) -> PPCISD::VABSD(X,Y,1) v4i32 combine wasn't legal
(https://alive2.llvm.org/ce/z/jc2hLU) - so I've removed it, having already
added the legal sub nsw tests equivalent.

        Differential Revision: https://reviews.llvm.org/D142313

    This fixes a "Wasn't expecting to be able to lower this!" fatal error
    when compiling graphics/opencv for PowerPC.

    Requested by:   pkubaj
    PR:             271047
    MFC after:      1 month

 .../llvm/lib/Target/PowerPC/PPCISelLowering.cpp    | 85 ++++------------------
 .../llvm/lib/Target/PowerPC/PPCISelLowering.h      | 16 ----
 .../llvm/lib/Target/PowerPC/PPCInstrVSX.td         | 23 +++---
 3 files changed, 24 insertions(+), 100 deletions(-)

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