<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/105685>105685</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            `llvm-foreach` takes 100% cpu usage
        </td>
    </tr>

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

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

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

<pre>
    While building SYCL code with Intel oneAPI, I noticed that `llvm-foreach` is almost always sitting at 100% cpu usage.

### top:
```
%Cpu(s):  8.5 us,  5.0 sy,  0.0 ni, 85.8 id, 0.1 wa,  0.0 hi,  0.6 si,  0.0 st
MiB Mem :  64023.7 total,  27107.4 free,   6165.8 used,  30750.5 buff/cache
MiB Swap:  32958.0 total, 32958.0 free,      0.0 used.  53965.6 avail Mem 

    PID USER      PR NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND 
  99440 fwyzard   20   0    4540   2176   2048 R 99.7   0.0   5:42.07 llvm-foreach 
 100326 fwyzard   20   0  309368 274324  48756 R  99.3   0.4   0:05.92 ocloc 
```

### ps -xf:
```
  98325 pts/2    S+     0:00  |   |   | \_ /opt/intel/oneapi/compiler/2024.1/bin/compiler/clang++ @/tmp/icpx0294253703WMgiHH/icpxargD9hFos
  99440 pts/2    R+     5:42  | |   |                                   \_ /opt/intel/oneapi/compiler/2024.1/bin/compiler/llvm-foreach --out-ext=out --in-file-list=/tmp/icpx-ff969312fd/Activemask-tgllp-63b648.txt --in-replace=/tmp/icpx-ff969312fd/Activemask-tgllp-63b648.txt --ou
 100326 pts/2    R+     0:06  |   |   |                                       \_ /usr/bin/ocloc -output /tmp/Activemask-tgllp-e57dbd-65fea9.out -file /tmp/icpx-ff969312fd/Activemask-tgllp-63b648-0e09e1.spv -output_no_suffix -spirv_input -device tgllp -options -g -cl-opt-disable
```


This seems to happen for any backend. I've observed this consistently with oneAPI 2024.0 (based on LLVM 17) and 2024.2 (based on LLVM 19), running on Ubuntu Linux 22.04. 
</pre>
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