<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/64427>64427</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [libc++][test] std/containers/views/mdspan/mdspan/conversion.pass.cpp Fails on PowerPC targets
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            libc++
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          amy-kwan
      </td>
    </tr>
</table>

<pre>
    This test was introduced in https://reviews.llvm.org/D154367.

Assertion seen:
```
Command Output (stdout):
--
$ ":" "COMPILED WITH"
$ "/home/amyk/llvm/community/build/bootstrap/stage1/build/./bin/clang++" "/home/amyk/llvm/community/llvm-project/libcxx/test/std/containers/views/mdspan/mdspan/conversion.pass.cpp" "-pthread" "--target=powerpc64le-unknown-linux-gnu" "-nostdinc++" "-I" "/home/amyk/llvm/community/build/bootstrap/stage1/build/include/c++/v1" "-I" "/home/amyk/llvm/community/build/bootstrap/stage1/build/include/powerpc64le-unknown-linux-gnu/c++/v1" "-I" "/home/amyk/llvm/community/llvm-project/libcxx/test/support" "-std=c++26" "-Werror" "-Wall" "-Wctad-maybe-unsupported" "-Wextra" "-Wshadow" "-Wundef" "-Wunused-template" "-Wno-unused-command-line-argument" "-Wno-attributes" "-Wno-pessimizing-move" "-Wno-noexcept-type" "-Wno-atomic-alignment" "-Wno-reserved-module-identifier" "-Wno-user-defined-literals" "-Wno-tautological-compare" "-Wsign-compare" "-Wunused-variable" "-Wunused-parameter" "-Wunreachable-code" "-Wno-unused-local-typedef" "-Wno-local-type-template-args" "-Wno-c++11-extensions" "-Wno-unknown-pragmas" "-D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER" "-D_LIBCPP_ENABLE_EXPERIMENTAL" "-Werror=thread-safety" "-Wuser-defined-warnings" "-lc++experimental" "-nostdlib++" "-L" "/home/amyk/llvm/community/build/bootstrap/stage1/build/./lib/powerpc64le-unknown-linux-gnu" "-Wl,-rpath,/home/amyk/llvm/community/build/bootstrap/stage1/build/./lib/powerpc64le-unknown-linux-gnu" "-lc++" "-o" "/home/amyk/llvm/community/build/bootstrap/stage1/build/runtimes/runtimes-bins/test/std/containers/views/mdspan/mdspan/Output/conversion.pass.cpp.dir/t.tmp.exe"
$ ":" "EXECUTED AS"
$ "/usr/bin/python3.8" "/home/amyk/llvm/community/llvm-project/libcxx/test/../utils/run.py" "--execdir" "/home/amyk/llvm/community/build/bootstrap/stage1/build/runtimes/runtimes-bins/test/std/containers/views/mdspan/mdspan/Output/conversion.pass.cpp.dir" "--" "/home/amyk/llvm/community/build/bootstrap/stage1/build/runtimes/runtimes-bins/test/std/containers/views/mdspan/mdspan/Output/conversion.pass.cpp.dir/t.tmp.exe"
# command stderr:
t.tmp.exe: /home/amyk/llvm/community/llvm-project/libcxx/test/std/containers/views/mdspan/mdspan/conversion.pass.cpp:87: void test_conversion(FromMDS) [ToMDS = std::mdspan<const int, std::extents<int>, std::layout_left, conv_test_accessor_c<int, false, true, true, true>>, FromMDS = std::mdspan<int, std::extents<int>, std::layout_left, conv_test_accessor_nc<int, true, true>>]: Assertion `to_mds.data_handle() == from_mds.data_handle()' failed.

error: command failed with exit status: 250
```
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzUV1tv27gS_jX0iyBBonzLgx8UyzoNkLRGk4P2PBmUOLZ5SpECOfRlf_2CsiLbSRbtboPdLWBYJGeG882FHA6zVmwUwIyMbskoHzCHW21mrD6G3_ZMDUrNj7OnrbABgsVgz2wgFBrNXQU8ECrYIjaWpBmhBaGFgZ2AvY2k3NWRNhtCizwZDdPxJCJxTuLs9J9ZCwaFVoEFUF76RBzH3a-dznVdM8WDTw4bhwGhU4tcOyT0phcJw06UDgNCaQuE-tH808Py7n6RB1_unj54yhUbLba6BkILVh-_EVp4vIQWla5rpwQeCS1KJyT3X63RomENoYVFtoHkghj5sVBeVDK1IfS2_dEfVeKXwsbo_0OFfirK6nAgtPDObvXxVkAhEwqMJbRo_UtoUXPbMHU5qLTagbFCq6hh1kZV03RIwga3Bhh_nobIzAaQpHmj92CaajyUEDr1Tem9CqVQ7hBulHtmV9oiF6q6si68-xNm_pAvhaqk436jXlOxS_4Gdd9xwk_D-V6QXdNog887-5ineaeTjp-Xv4Ax2vQzJmU_rpDxsGbH0sPvdgN-FjygYf3MbhnX-37qFIf1xcxZ4CFC3UiG0K8rHXak6nQmvX8gZGbjalB4yccQjSgdgr1cbcBaUYvfhNqEtd5d7aw0HCpoMMRjA9db6VpUIZNio16qMWDB7ICHteZOQig4KBRrAeYKtAUTclgLBR4ygmHyChcyh1rqjaiY9LY1zJwh-Jvx1WLnhx0zgpXy1XrDDKsBL2A4ZYBVW88cVpq_5VSpvXpv_mUwlL4g9DHxTr8yocuUJAnhgKD8-bfXOk4Z3Ri2qVlPylf3d7fz5XL1IXtcffy0Wn7O_vOQrR7_9_i0eFh9WGT54vMr3sXH7PZ-sVp8XS4-3z0sPj5l9y_yM81PV01o2Rp89j974TISe2aUUGczZGcDHBowwoeayavLR4ry-vK5f-_bIDodzO_fBp09ktB5aBqGW0Ln_xQK-eJK1u_tFeMUitof5X4YlsLn11-qUKdC_napirgwftsI6yaCA7wq2X1lX3xdzP_7tMiD7PGNuu6s6Wtyc8StVmk0fb_LOvIhcihk55Oo6XM8hANUrRW_eBA6c355O95MpjToSlhgkYMx_UvyzJxmwb_h7ZZm04nHstOCt6_v1ZmL0GlhdP2QPxJ6E5DR7ZN-yB8DkuZB-37ISJp1m6fzSiuL_tlO6PxMbqsFWpLOPSVdXBElO2qHKwnrVsgrXrUQWFWBtdqsqk6QzoM1kxb8AI17_U0X3eYd4D8A-c7w1AW-N-CMcu_ZcxtCxjHqVc1txBmy1ZYp7mv7tPVumnvIa6PrtzkInQRrJiTwqyanK4hZn3AnnmAvcBvAQWBgkaHzzVNAR_GLFmjAZym_SW_YAGbJ-CZJxqN0MhlsZ6OyZGyapIyX8XhSjcpkvB4Nx3RaJQkfJ-VAzGhM03gaD5NxfJNOoipNoIrLZFpWwxjGMRnGUDMh-y5tIKx1MBsPh3QykKwEadt-kFKf1H2N8f2hmbVpX7qNJcNYCovnZm-AAmXbSV6IjXIyum2PxOgU9p85E0HBhLSBVsHS18flPDh1MnbgjJxdt6IbgVtXRpWuz8f3xZFtzfbKW8t_DwAA__8ez8w7">