<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/62977>62977</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Clang build error: Leaf constant_fold_fabs is unreachable
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
      </td>
    </tr>

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

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

<pre>
    ```
[1347/3506] Building AArch64GenPreLegalizeGICombiner.inc...
error: Leaf constant_fold_fabs is unreachable
note: Leaf idempotent_prop will have already matched
error: Leaf constant_fold_fabs is unreachable
note: Leaf idempotent_prop will have already matched
[1359/3506] Building AMDGPUGenPostLegalizeGICombiner.inc...
error: Leaf constant_fold_fabs is unreachable
note: Leaf idempotent_prop will have already matched
error: Leaf constant_fold_fabs is unreachable
note: Leaf idempotent_prop will have already matched
[1363/3506] Building AMDGPUGenPreLegalizeGICombiner.inc...
error: Leaf constant_fold_fabs is unreachable
note: Leaf idempotent_prop will have already matched
error: Leaf constant_fold_fabs is unreachable
note: Leaf idempotent_prop will have already matched
```
I think we should clean this errors, even if it is a soft failure.
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzslMFq3DAQhp9GvgwxtmTZ64MPThaHQAq59LyMpbGtVpYWSd6wffriTdpCKYWeegkIBEK_5uNjNBijmR1Rx-Q9k8cMt7T40F2Dd7M1Lhu9vnasLt5XcWRFz-R9KaqG8UHIombyCPebsdq4Gfo-qKWuHsm9BHqmGa35Ro9PD34djaOQG6fyPH97hkLwgYkengknUN7FhC6dJm_1acIxgomwuUCoFhwtvYWcT_QzYzStZ5_IpdM5-DO8GmthwQsB2kCor7BiUgvp_1TwJkq2fxT16fj48nn35GP6ELWLqsXfRX00VP_bR3yCtBj3FV4J4uI3q0FZQrefRrjBRcYfgC7kwExg0g6EEP2UYEJjt0B5pjuhW9FiRl1ZHyQ_8LJssqUrD_U4VZKwUYq3WkmJZa2wKYtWHAqtMtPxgotC8kMppCybXNZ6qoQuqlGrSXPBqoJWNDa39rLmPsyZiXGjruZt02QWR7Lxx9wJ3X7pbtzmyKrCmpjir1gyyVL3YNHNMO6NAf9oPtuC7ZaUzpGJnvGB8WE2adnGXPmV8WGv9L7dnYP_QioxPtxoI-PDDfh7AAAA___wgLsJ">