<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=http://email.email.llvm.org/c/eJzNVNuO2yAQ_Rr7ZWSL4DiXBz9km3bbh22r_sHYYJsNhgjwrtKv7xhnd9Vmq0bqVirCA2NgOGeAU1txqpIV0_phSPgHYRtPzU48oGmkuBmVFj53PtAUwNqOAe5GHVTmA3YSvt5-gYRv-hCOPil2tJLqFCq3rvttuD4MOuHF8BIoO3Y24VtQHsjXModP0KAxNkCrjIDQS6inxRDQdTIAwYkLeaaMD24cpAlSZJ000mGgeM62AgPSvITtE7Y7W3LnOru8hGbAg4Ts9rMy9wjZO2g0mgl7HJhabHo5sSCy-Xn2x4kjZDf0NwxHspQYssQC3qrMCLVFoUwHyqigUEMEQznR8gqcc4g8z1_YmieWryC_KqFvxu-CaoRGlwje085uIi2Uk02w7jQd9yXghK__BZr_vfySLemcdVNnNAdjH83zC-Hr614IX7_-Nma7jMqQ1RLNd0hFVYhtscUUx9BbV92hP3zDUzo6Xf0sAp0K_VjnjR3OinBupn3v6VTJVd6P8cKWxXK7SPuqbFkhiobzTVtjwVgplqysOQq22pT0pRprqX2VlPTwuJGPEENQPyn36d8jUBVnnLNFwRabcrnY5JJt2hVbFgvREm2BlA05oNL5k8SlrprTM3Z-SpXywb8MoveqM1JGwIQwqKCjE2Wx3MMfRfdCJJ8VMo3Yqwj8B1y5nOY>53491</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [docs] llvm/docs/AdvancedBuilds.rst#multi-stage-pgo is stale
        </td>
    </tr>

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

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

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

<pre>
    `llvm/docs/AdvancedBuilds.rst` about Multi-stage PGO (https://llvm.org/docs/AdvancedBuilds.html#multi-stage-pgo) is stale. I cannot find the build target `stage2-instrumented-generate-profdata`

```
% cmake -GNinja -C clang/cmake/caches/PGO.cmake -Hllvm -B/tmp/out/pgo                                                                         
loading initial cache file clang/cmake/caches/PGO.cmake
...
% ninja -C /tmp/out/pgo stage2-instrumented-generate-profdata                                                                                    
ninja: Entering directory `/tmp/out/pgo'                                                                                                                                                                                                                                                    
ninja: error: unknown target 'stage2-instrumented-generate-profdata'
```

@llvm-beanz 
</pre>
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