[Bug 277474] clang 17 crashes with -fzero-call-used-regs when optimization is enabled

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=277474

--- Comment #6 from commit-hook@FreeBSD.org ---
A commit in branch releng/13.3 references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=26059a4f2c14d72d114175a05f75bebe43aa6efa

commit 26059a4f2c14d72d114175a05f75bebe43aa6efa
Author:     Dimitry Andric <dim@FreeBSD.org>
AuthorDate: 2024-03-04 20:30:54 +0000
Commit:     Gordon Tetlow <gordon@FreeBSD.org>
CommitDate: 2024-03-28 07:13:15 +0000

    Merge commit f800c1f3b207 from llvm-project (by Arthur Eubanks):

      [PEI] Don't zero out noreg operands

      A tail call may have $noreg operands.

      Fixes a crash.

      Reviewed By: xgupta

      Differential Revision: https://reviews.llvm.org/D156485

    This should fix an assertion failure building qemu, specifically those
    parts using -fzero-call-used-regs.

    Reported by:    Daniel Berrangé <dan-freebsd@berrange.com>
    PR:             277474
    MFC after:      3 days
    Approved by:    so
    Approved by:    re (so, implicit, appease the commit-hook)
    Security:       FreeBSD-EN-24:07.clang

    (cherry picked from commit a39b3aa463f3474fabb3aedb5aecf943b54b4357)
    (cherry picked from commit 961271f952fc390396f967d50903291e3e6c59c6)

 contrib/llvm-project/llvm/lib/CodeGen/PrologEpilogInserter.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

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