<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/62379>62379</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Regression building python 3.11.3 on ppc64le
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

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

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

<pre>
    I've run in to a regression building python 3.11.3 on ppc64le.  I bisected it and the regression as caused by 7d10213317c18e1d24753e5532d2b037db2d2c5c.

The problem is that one of the python tests segfaults at this line: https://github.com/python/cpython/blob/f3909b8bc83675b7ab093dbc558e677558d8e718/Python/dtoa.c#L1660

I've attached the output of `clang -S -emit-llvm -Xclang -disable-llvm-optzns -c -Wsign-compare -DDYNAMIC_ANNOTATIONS_ENABLED=1 -g -Og -Wall -O2  -fexceptions -g -grecord-gcc-switches -pipe -Werror=format-security -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS --config /usr/lib/rpm/redhat/redhat-hardened-clang.cfg -fstack-protector-strong   -m64 -mcpu=power8 -mtune=power8 -fasynchronous-unwind-tables -fstack-clash-protection  -D_GNU_SOURCE -fPIC -fwrapv   -O2  -fexceptions -g -grecord-gcc-switches -pipe -Werror=format-security -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS --config /usr/lib/rpm/redhat/redhat-hardened-clang.cfg -fstack-protector-strong   -m64 -mcpu=power8 -mtune=power8 -fasynchronous-unwind-tables -fstack-clash-protection  -D_GNU_SOURCE -fPIC -fwrapv   -flto -g -std=c11 -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -Werror=implicit-function-declaration -fvisibility=hidden -I../Include/internal -IObjects -IInclude -IPython -I. -I../Include   -fPIC -DPy_BUILD_CORE -fno-strict-aliasing -o Python/dtoa.ll ../Python/dtoa.c`
[dtoa.ll.txt](https://github.com/llvm/llvm-project/files/11332036/dtoa.ll.txt)

@fhahn @nikic 
</pre>
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