<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/144639>144639</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [RISCV] RISCVTargetParserDef.inc doesn't get rebuilt when RISCVProcessors.td is modified
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          tclin914
      </td>
    </tr>
</table>

<pre>
    There are a couple of post-commit CI failures (https://github.com/llvm/llvm-project/pull/144022) after we made changes to the CPU definitions.

The reason is that `RISCVTargetParserDef.inc` does not get rebuilt when `RISCVProcessors.td` is modified, because the build rule for `RISCVTargetParserDef.inc` does not declare a dependency on `RISCVProcessors.td`, as shown in `build.ninja`.
See https://github.com/llvm/llvm-project/blob/ad9e591fd53f2cf91a2744973b59669d873658af/llvm/cmake/modules/TableGen.cmake#L47 for more details.

The CMake version should be less than 3.23; otherwise, it will use depfiles (.inc.d) instead.

Should we explicitly add all the .td files under `llvm/lib/Target/RISCV/` as dependencies of `RISCVTargetParserDef.inc` , similar to `file(GLOB_RECURSE global_tds "${LLVM_MAIN_INCLUDE_DIR}/llvm/*.td")`?
</pre>
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