<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/72027>72027</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [llvm-mca] "error: unassigned file number in '.loc' directive" when trying to analyze GCC output
        </td>
    </tr>

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

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

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

<pre>
    Trying to analyze code generated by recent versions of GCC with LLVM-MCA results in error messages, such as:
```
<source>:69:7: error: unassigned file number in '.loc' directive
        .loc 1 8 9 view .LVU29
```
Reproducer on [Compiler Explorer](https://godbolt.org/#z:OYLghAFBqd5QCxAYwPYBMCmBRdBLAF1QCcAaPECAMzwBtMA7AQwFtMQByARg9KtQYEAysib0QXACx8BBAKoBnTAAUAHpwAMvAFYTStJg1DIApACYAQuYukl9ZATwDKjdAGFUtAK4sGIMwCsAOykrgAyeAyYAHI%2BAEaYxBIAHKQADqgKhE4MHt6%2B/sHpmdkCEVGxLAlJXKl2mA45QgRMxAR5Pn6BIfWNAs2tBOUx8Ykpti1tHQXdE4PDldUpAJS2qF7EyOwcJhoAguYAzJHI3lgA1CaHbsgKBPiCV9i7e8xsCmlMW%2BdxTFkKlyCVn2ADdUHh0OdMCCWAJUAB9Q4QNAMO7ndDrOL0ABU53h8OImDuxDwDnOqlI6MxOLxBKJBBJZJYlIxXixmFx%2BMJxNJBHOaWWJiBL3OovJl0OABFzncmI5kPDRHcrm5WezsU8IPi4l46I4GPC/gofJhDbQ8MAougIBTzgA2STLQWHYF7MXnFgS6Wy%2BWKv4EFVqnGa7W62j6w0KY1sM0Wq0QZn2x3O13utJemUtX1KgPXIMckPwnV6yKR6OmsRxzDWtKUh1Oq6u3YAThYJgCFkkhzM7elV2lqnbFjMzd751xbY7XF7jZeLcnncOhzH/fJQ5HY4nQ%2BXAUls/286HXckK6la47G93449R5nLrnGlbR8OAVPA/Xr6vW47J93%2B4Oj4Ll2dpvuew6jl%2BN4diBf73gegHPkEoGDheEHSt%2BFhIbBTYIT%2BhzJMhH6blBmF3jhT54WhGYoeBxELgR2EPhRnaSBohEXp%2B6EkQxe5wQBzGSJI05XquNFmGxkH0WRTFpNuWF9meQHdiulgkV2O59qpSm/ppFhqS%2BKl6UpMG6fp8mXFpz48RZRnPlR1hqaxhmOcJpk0cpkFiVRuJiZxNlgR5XELhJbnbj2klDq5/nueFQXrs5MV0duCVhUlP4pR2gXXgufkOYlEXQRlFhZRh5l5alBUWDx/5CnuB5BHVAFNQ%2BewcKstCcAEvB%2BBwWikKgnBuNYDkKOsmyYBZhw8KQBCaG1qwANb%2BM2AB0ATJOthzNvhUjNmYkh2vonCSN1c39ZwvAKCAGgzXNqxwLASBoCwaR0Ik5CUM9r30EkwBcN2pBYCCpKYAAangmAAO4APJpIwnDTTQ4aJFdEBxGdcSRK0ACeCO8JjzDENj0NxNoDSzdwvDPWwgjQwwtC471vBYDqwBuGItBXZTgOYCwhjAOI3P4ISjQgkSZ2YKoDReAQ2zTZEssdUz%2Bh4HExA4x4WBnQyeAsHjqxUAYwAKODUOw/D3P8IIIhiOwUgyIIigqOoyu6Fw%2Bj8ygw2WCrcRXZAqyoGkjgCFzAC00NUP65xh3zmwIP2CB/JDmC0LQMeWqgYd/GHtCoMgwNQ2HxppBkbQZ8A6BxIcvCoGLxAklg/sQKsvQh34ECuNMfju%2BEkQjFUYzuxkWTt93egj6UDALKMNS2Kn5NNJM7SeJ0eht0v8z94sQ9zFMq8FO7sptDPg81K3Y1bBI7WdadysDRw5LJHaYcOucwDIMg5z/StZjnBAuBCAkEmlwZYvAKZaCdKQJahw7S/yXLAl8G0AhcDMP9I6HATqkB6n1B%2Bl1rq3SZvdGAiAQBEE8B9CArRjYXVINQhQyhDCpyEAgVAkMerTWrEAxuegrbCFEOIe2fCnZqDOm7UgsJmBoEAUQYgAAJP4FhMCMD2DLVA5srR4wkQIL4qAZEkA0VoyRujmgPC0XcMxHBLr3EiIwqItAWFsI4eA1AngACS6AQBpxhLHUQDIvAMAWqQSG6s0j6wwV1bBZ0H7eJYL4pg/9/GBOWE/F%2Bb8P5fx/n/AB%2BBZEgMpB4F6b1iAgLAYQyBi0QCHEkCtWoGggjNiCBobszZmwBGAhgrBODa60KujdCB80MFmDvrg2hAyoH1yyM4SQQA)

For a similar, but different issue it has been [suggested ](https://github.com/compiler-explorer/compiler-explorer/issues/3239) that the issue is not in MCA itself, but an LLVM library.
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJycllmzuryTx18N54b6nYKwKBfnIgkgi4jggnjHEgOyyiLgq5_S83tmpmqemos_ZanpkO5vV3e6PlHf57Qm5IeRECOpX9E4ZE33c8zjptuEX3GTLj_Hbslryg4NG9VRubwImzQpYSmpSRcNJGXjhe1IQuqBfZKuz5u6Z5sbu8GYnfIhY7fbs_PHwZDtSD-WQ8_mNUu6runYivR9REnPAMz2Y5KxUc8IkOFUhoOMzP39_C4F3DdjlxBG0BgBygojwBUjwF9P7z9j_TeZlL3lJWHrsYpJ9w7GgNV32SQMWLFp3pFkyJ_k1yv793lvszy7ZhX2mZOJ_d6eT0D5VyE-absmHRPSsU3NMhLCTdXmJelYbW7LpiMdI6kMWGfD0H6yAToDdNqkcVMO301HPwbhxQjQDbc0gzp6pJKHZxhO-xA5uEJ-irZQ5z2cwGivYei8JjQ4cAW9SR8cDy3Qp4o9eKEGlz6POe8C8bxGCNoNqo8QnqDRTtB5Qj08HgaL8qoJW4hD6I3hWJTKFR4n1b6ncKOfBmiL_cZ0JtxDdyk6ChcClxAaJgMkgKAWhTMyoWF7UH1QO9NExxjkzx4D9N5oq7TA2nkzb2FpXewSVFCUPOo7M_SlfS0j8xbsYA8G5J7mdVi0Q84PhndJNXGvlumphdYBPPSVtrhTYmUNpGMIX5ZhCiWFPI6MuKc22uf4rOQrsp57XJVO8Imfzke9sMsFn2sA1fRkZJybOhgH0DpBpHiit4OOu6pTtXO3HEQnScjWrlmp46xOau0-SlN2Znc7I9tCyLpaYWnOl3yu9Pnj37HmnYUMNwoCK0dbwW2eVsm5EOmvOqlMqdirvpF0lRSQV39am_tcLEXZFDd7_Kn4zcrU2Fs7sBmpiY4vCsHhuPUCI9RXzqXW6UEOlk-kwH6Kmn5-1JtoFcjgLk-cHfK9wwUPzrvWYBZcXhgHi1Sn4cLbdH8xnaTYT_VZXmxfdqven19qMNinjHcf8iiE8JiFFsV6UWQvZ0XKMygfdazfnVe6kvg5DlcXfXW_km1S14mbvQwG6DfLk4xQrL2Ppgs8lT0DdLCWjUtS2HIZiauNIoii4kv1tqs3ZeyvXXjev1v80snPQFxZivA5LLp3cVuCtH2OZJLv5ce4E9Mc3VYCJdTYF1qzUTOiGYfhs6lnZoyOoXn8rLKX5WSGHJeo0oV7dpTEINuEDUGztqU-0PaZX0cH1GTapf0ckLXCm4k0eei1OVgmJ10e406vNnNhcIF_1NvdGOhKRTwjzceSFmfgSsqjPVQM0NtWzx6Hjxu7lE-ts5Fv7bq66O1LXPtXv96XPp89ojmr3MRqCy5pCz0_-6OVX-ddSX3pom0zK67jOyhK9SExQK9HonuXrpecM5eO-Jydyr3Y-oBeLnS8FW5YahfPL_Xs6mdSKUUlOgXqzABdwvWIJGScob77LQSZErsfcAK1J_oY0BTkhU1rNO5CtbDdvlpCdM2mte0hHG34xwR38W8HA4g4eLTcIXvtntnpvqvCIgPPpsaHHZ8IynV6QhvDDX1ddo952sIDavAU-ZxZSPjkKJ3AacWEkh1oUYhxa4cQRjWtIHRFuLdac6rV49ETI0tPNTRv0uTg2xzEBLtr6_5Std2d2827Rj280ump7oOJ3r1pGrC44p8oVB8TGjfmgC7XI3VDPGV36JrCXjQPd48WhysI7Ub1CfTA63jV-j49vX77QzS0GYqzGKDaWwjsjftjPsFwgrarntyJAboq7NemaWa5O53oYpo5fbjNMsr69PFwXy90AgHuEv9yhY-l2RR3ivUXxBy3O-1lac6EVzWZe4Dfg85SK8xtPYcEDxqmDNA3xoAbh047Dxhz26Ii9q5rKKPZTJ642WxnWJTvUd97dv_0MkHU8LhzbvfxE10rvLt-Cl_jXATHQREIvcsnFW5tZ3cAdi3tdpazOhCLI9nAPdcvRew95aU7j7Xurvp2UPd0zdtCyMfIXAVplC696k_S1jKiMHHHZFJNh0ovBuiH4XqvERwRhoVWldM1fEL7GuHU9qwom1YHBujLZQvL9YaDWaI6e8WUDXh8FEiu-d-GK_nuIRyuz3QDc-ghTVsjBcPOv4eXs7nzMm_JVNwuGqRnWDikOwadBueR0C7GuuaaBNxwfX2obrU60d6qUKPBkxdSCK29qGcOdlSgbs9Q6jtfnArP3IoPeNUKyJ2bxR_vFd1j7pI4s4G2naDl5vQwBxjovSkSyMOaQnyQoYfaOdsaJ081n9CBwcM7bOSeu8vTdOZjdOWMFbHCrdi-y6K8S4jcQGOArn-SjNd76fa-gTUDdPj3pl016rRI1OWYzyHdwtBbUM552NAKPATNhtL7LseoifvXtZrQBma0Q64ayZw93lOM1pyjV-qzoyCDS2Pwy-KIB8-DzH_Dxedbbzo2Yvu8ysuoe8NQPA5smt9upHtTVd73I2Hzgc2ino0J-WBHP1JK-jd-_Stv5EM2xt9J8x5wyV9C-UP-IZR_t33ivGe-AASFAQo7ZNHADhn5R0HP1s3wJqo3zeVDT8rbP2qj-sN5bJnHXdQt31_pj5AqghJ9kR9eVpQVL60l7iv74fiEV4REvsmJIMuCuAZ8qgB5JQGFIxEAX_kP4IDAvx-JXwnct7iWeCFJeT5erW-xlDAiR6ooL7_L8lm9ierrI-9nBTiw-iqjmJT9h2cBqMn0q50B4I233c_7zJ94pD0jcmXeD_3_eBnyofyA8OedKokYSWUZAP5TwgSAnTJSs8P_4ec3Gjfj0I7D19iVP_9P6d5S_v78abvmTpLhfxfqk_J_BQAA__-ocMW7">