<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/84654>84654</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [ppc][compiler-rt] Potential miscompile in compiler-rt
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            backend:PowerPC,
            miscompilation,
            compiler-rt:sanitizer
      </td>
    </tr>

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

    <tr>
      <th>Reporter</th>
      <td>
          vitalybuka
      </td>
    </tr>
</table>

<pre>
    From https://lab.llvm.org/buildbot/#/builders/18/builds/15713/steps/9/logs/stdio

```
[8/9] Running compiler_rt regression tests
AddressSanitizer: CHECK failed: sanitizer_common.h:534 "((size_)) == ((capacity()))" (0xaaaaaaaaaaaaaaaa, 0x0) (tid=43152)
    #0 0x119255590 in __asan::CheckUnwind() /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/asan/asan_rtl.cpp:69:3
 #1 0x119274da4 in __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_termination.cpp:86:5
 #2 0x119289c28 in push_back /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/lsan/../sanitizer_common/sanitizer_common.h:534:7
 #3 0x119289c28 in ProcessRootRegions /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/lsan/lsan_common.cpp:574:22
 #4 0x119289c28 in ClassifyAllChunks /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/lsan/lsan_common.cpp:643:3
 #5 0x119289c28 in __lsan::CheckForLeaksCallback(__sanitizer::SuspendedThreadsList const&, void*) /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/lsan/lsan_common.cpp:734:3
 #6 0x119297184 in __sanitizer::TracerThread(void*) /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp:321:5
 #7 0x119268908 in __sanitizer::internal_clone(int (*)(void*), void*, int, void*, int*, void*, int*) /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp:1571:3
AddressSanitizer: CHECK failed: sanitizer_common.h:534 "((size_)) == ((capacity()))" (0xaaaaaaaaaaaaaaaa, 0x0) (tid=43155)
    #0 0x1357f5590 in __asan::CheckUnwind() /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/asan/asan_rtl.cpp:69:3
 #1 0x135814da4 in __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_termination.cpp:86:5
 #2 0x135829c28 in push_back /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/lsan/../sanitizer_common/sanitizer_common.h:534:7
 #3 0x135829c28 in ProcessRootRegions /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/lsan/lsan_common.cpp:574:22
 #4 0x135829c28 in ClassifyAllChunks /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/lsan/lsan_common.cpp:643:3
 #5 0x135829c28 in __lsan::CheckForLeaksCallback(__sanitizer::SuspendedThreadsList const&, void*) /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/lsan/lsan_common.cpp:734:3
 #6 0x135837184 in __sanitizer::TracerThread(void*) /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp:321:5
 #7 0x135808908 in __sanitizer::internal_clone(int (*)(void*), void*, int, void*, int*, void*, int*) /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp:1571:3
AddressSanitizer: CHECK failed: sanitizer_common.h:534 "((size_)) == ((capacity()))" (0xaaaaaaaaaaaaaaaa, 0x0) (tid=43164)
    #0 0x3fff8a63a924 in __asan::CheckUnwind() /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/asan/asan_rtl.cpp:69:3
 #1 0x3fff8a5312f0 in __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_termination.cpp:86:5
 #2 0x3fff8a54b6d4 in push_back /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/lsan/../sanitizer_common/sanitizer_common.h:534:7
 #3 0x3fff8a54b6d4 in ProcessRootRegions /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/lsan/lsan_common.cpp:574:22
 #4 0x3fff8a54b6d4 in ClassifyAllChunks /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/lsan/lsan_common.cpp:643:3
 #5 0x3fff8a54b6d4 in __lsan::CheckForLeaksCallback(__sanitizer::SuspendedThreadsList const&, void*) /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/lsan/lsan_common.cpp:734:3
 #6 0x3fff8a536168 in __sanitizer::TracerThread(void*) /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp:321:5
 #7 0x3fff8a52434c in __sanitizer::internal_clone(int (*)(void*), void*, int, void*, int*, void*, int*) /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp:1571:3
AddressSanitizer: CHECK failed: sanitizer_common.h:534 "((size_)) == ((capacity()))" (0xaaaaaaaaaaaaaaaa, 0x0) (tid=43168)
    #0 0x3fff91f6a924 in __asan::CheckUnwind() /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/asan/asan_rtl.cpp:69:3
 #1 0x3fff91e612f0 in __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_termination.cpp:86:5
 #2 0x3fff91e7b6d4 in push_back /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/lsan/../sanitizer_common/sanitizer_common.h:534:7
 #3 0x3fff91e7b6d4 in ProcessRootRegions /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/lsan/lsan_common.cpp:574:22
 #4 0x3fff91e7b6d4 in ClassifyAllChunks /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/lsan/lsan_common.cpp:643:3
 #5 0x3fff91e7b6d4 in __lsan::CheckForLeaksCallback(__sanitizer::SuspendedThreadsList const&, void*) /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/lsan/lsan_common.cpp:734:3
 #6 0x3fff91e66168 in __sanitizer::TracerThread(void*) /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cpp:321:5
 #7 0x3fff91e5434c in __sanitizer::internal_clone(int (*)(void*), void*, int, void*, int*, void*, int*) /home/buildbots/ppc64be-sanitizer/sanitizer-ppc64be/build/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_linux.cpp:1571:3
llvm-lit:
```
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzsWk9vozgc_TTOxWoE_gPmkAOTbLTSzqGamT0jA07w1rGRbfpnPv3KQFqStts5dYc2VQS1Hch7z_75vYO5c3KvhVgB-gXQzYJ3vjF2dSs9Vw9ld8MXpakfVltrDrDxvnUA5wBtAdoqXi6Vuj0sjd0DtC07qerS-H4QHzuEdQBtY3Zs9y2axuELzos2tLPwMrN3fVctDYg2IMrHaxKNn6FJv7D-CbqB3zqtpd7DyhxaqYQtrIdW7K1wThoNvXDeDU_ldR16v3MtvfwpLMA5XP_5x_ovuONSiTq03XGwqMzhYPSyATinmECAEEAMIObkT1EAlAGUQYA3AG_gMFDxllfSP_St7PhBYTS652d_AK1hdB_1L0HMyxrgDcExReGhHi2EEAKEIxjdx3GGKKVZBKWGRcEd10F-nK8bUd38re-krodfhQBtG3MQk4kIerZtlZBSXD2yCxof_78aR4_PhGlQt4er1pp_RBUm8ijtlQ0tJUuAtj2I4VZYr5ZV2wKcJxnAOR4JAITjEX1Kak4G9G4i_5HCdtAfsarhFlZGOw9QHjSS2ofbs_5O9-u1hsrofX95rfcdNTlfPCddXtiD1NxLo0exWBLW1pNYaBSLZRViQay2c01R8urm_SioYVqXy7fonJYHwHn6RASfE7m2phLOfTPGfxN7abR7d0bhdgQ9yE_TABuhJ9zkHPdahX1x95ArtW46ffM7wE4IPq0xeo66KNTpDrE19qvgN27NlQrLCSD2rA6_d64Vuhb1j8YKXruv0vljxSWhtm6NrPvie8eCelWEtF9yExGSUYQsjdnLG80PyythB3YAsf-Dzn8WlPOm9Y24M1bVhZK6uy-ULKtatCNnjOLT_SIdOScsi9iLnKX2wmquikoZLQBiUvvBrfLenCYqnEzx47573pO_0vm7iNjrNuoV8sXTIpmD-dMXzR_TdDdf88eUxRfz_0Xzx5ShD2H-UyJzMv8p7vmY_xT1pzV_TBn-bOaPKYsu5v8hzD8hL5k_3u12jCeYZ4jM0v8HAhTHaBddIsDbEWDUi5RJTeaeAs65zCgInEOfTRY4B_5Z48Bx30ni5GV3_JiJYKSNCCbVJRTMPxSw10JBFu-SWYeCLBbJJRT8eijIYpF-lFAw5TKzUDCFPqtQMAX-mUNB2Hc-YSjIYkEvoeDtUNC_WUkfhDk9ebCoV7jOcMYXYhWncRQhlCZs0azKmgmxIzGtYxwztGOYYE4oSqM0IzVNF3KFIkQiHGUIxRliy4SmhImK44hVNOUxIJE4cKkez1EspHOdWDGSULJQvBTK9QczEArVKXTIJtfmTtjrdR9EwvUg3aBD7yaP3VNtcD4RGAG6WdhVT7js9g6QSEnn3RMIL73qD4S0bQXoBtAv05fRDbw2XmgvuYKPPy7CApt8bdFZtTo9MLKXvunKZWUO40w-n9CeflgYvQL_BgAA__9PwTYq">