<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/64129>64129</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Segmentation fault for /llvm-test-suite/blob/main/Bitcode/Regression/fft/driver.cpp
        </td>
    </tr>

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

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

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

<pre>
    ### Used the below to run 
https://github.com/llvm/llvm-test-suite/commits/main/Bitcode/Regression/fft/driver.cpp
### Error occurred with recent clang version
18.0.0 ([https://github.com/llvm/llvm-project.git 970569b6ccb071d32e67ed26e3b972141efd2c31](https://github.com/llvm/llvm-project.git%20970569b6ccb071d32e67ed26e3b972141efd2c31))
Dated: 26-Jul-2023

### lnt command
$ export ONLYTEST="--only-test Bitcode/Regression/fft/fft"
$ lnt runtest test-suite \
    --sandbox ${SANDBOX_PATH} \
    --cc clang \
    --cxx clang++ \
    --use-lit=${LLVM_LIT_PATH}/lit.py \
    --use-cmake=${CMAKE_PATH}/bin/cmake \
    --test-suite $TESTSUITE \
    --cmake-cache Release \
    --cxxflags="$CXXFLAGS" \
    --cflags="$CFLAGS" lnt_benchmarks_stage \
    --run-order=$RUNORDER \
    --build-threads $BTHREADS \
    --threads $RTHREADS \
    --exec-multisample=1  \
    --test-size large \
    --cmake-define=TEST_SUITE_RUN_TYPE=ref $ONLYTEST  \
    --cmake-define=TEST_SUITE_HOST_CC:STRING=clang \
    --cmake-define=RUNTIMELIMIT:NUMBER=3600

### Snip from console output
```
2023-07-26 18:05:16 INFO: Execute: /home/vishnu/llvm-project/llvm/utils/lit/lit.py -v -j 8 /home/vishnu/halide/sandbox_3/test-2023-07-26_12-34-55/Bitcode/Regression/fft -o /home/vishnu/halide/sandbox_3/test-2023-07-26_12-34-55/outputfjepumvb.json
-- Testing: 1 tests, 1 workers --
FAIL: test-suite :: Bitcode/Regression/fft/fft.test (1 of 1)
******************** TEST 'test-suite :: Bitcode/Regression/fft/fft.test' FAILED ********************

/home/vishnu/halide/sandbox_3/test-2023-07-26_12-34-55/tools/timeit-target --limit-core 0 --limit-cpu 7200 --timeout 7200 --limit-file-size 104857600 --limit-rss-size 838860800 --redirect-input /dev/null --chdir /home/vishnu/halide/sandbox_3/test-2023-07-26_12-34-55/Bitcode/Regression/fft --summary /home/vishnu/halide/sandbox_3/test-2023-07-26_12-34-55/Bitcode/Regression/fft/Output/fft.test.time /home/vishnu/halide/sandbox_3/test-2023-07-26_12-34-55/Bitcode/Regression/fft/fft

/home/vishnu/halide/sandbox_3/test-2023-07-26_12-34-55/tools/timeit-target: error: child terminated by signal 11

********************
********************
Failed Tests (1):
  test-suite :: Bitcode/Regression/fft/fft.test


Testing Time: 0.11s
  Failed: 1
Import succeeded.
=======================================================================

```
### Additional Info

1. Repository: https://github.com/llvm/llvm-test-suite.git
2. With default flags
3. Preliminary analysis:

   In the header file **Bitcode/Regression/fft/halide_buffer.h**
    **filters** array is defined with external function. The name is specified with the following format

    **Format:** FftConvolve<B>{matrix}</B>{extra text}xCHalide,
    **{matrix}**: Available matrix sizes are as follows:
    8x8, 16x16, 32x32, 64x64, 128x128, 256x256

    File: **Bitcode/Regression/fft/driver.cpp**
    Function: **main**
    Line: **53**

```cpp
    for (int i = 0; i < 24; i++) {
        filter f = filters[i];
        f.fn(bufs + 0,
             bufs + 1,
             bufs + 2); //<-- A
    }
```

In the above marked line A, when the filter ‘f’ with dimension *32,64,128,256* is accessed, **segmentation fault** is occurred.
The soruce code for the function pointing is not available, it is in byte code (*.bc).


According to the git log history, commit 58284af "[test-suite:Bitcode] Add fft (from Halide) as regression benchmark" is added in release/5.x and there is no change after wards.
Commit history: https://github.com/llvm/llvm-test-suite/commits/main/Bitcode/Regression/fft/driver.cpp


</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzcWFtzozry_zTKSxcUCIPxQx7whTP5_zPJlOPsznlKCWhszQjkkoTj7KffksCXODkzZ2Z29mFTlAPqlvr-U0tMa75uEa9JPCXx_Ip1ZiPV9Y7rTduxproqZPVyTWjUP_CosQKzQShQyGcwElTXAgnmJMg2xmw1iTJCc0LzNTebrvBL2RCaC7E7_PMMauPpjhskNC9l03CjCc0bxltC8yk3pawsaYlrhVpzaYfr2hCaV4rvUPnldttLPOm1UEoqkGXZKYUVPHOzAYUltgZKwdo17FC5pdy8MPUDPwBCUxJP_6baWyW_YGn8NTcwGQdxMimSsiyCcVhFFJMxVjTBqJiMaTgKsa5oGYUknhOa_rgAQmMa_G0hdGIfZ9icGaxIlAFNvP_rhEcDGg2uunCYsJ6RTcPa6kAaAe63Uhm4v7v9c7V4WJFoTij1PNmKFxc2-GZ03C89rWZFqK51E09BBxLPeh4AAM_TrK0KuQdCR2Q8fcju5tP7z0-fstUHMp5fMpflEM7L8f2-JxA6JXR6Se40eoIbZ4-Vcnv7j49PtzergxgbAm787ct7E8uGfcXj1NnH7P8XZ_MKl7WO53Lyuc10ZB368HizWrzR3c71SlZuEJYokOk3K5X7fS3YWvcBIXQ0-_w5v83-eCCUvuG94DzyidY8FdiWm4apr_pJG7Z-I0h1rSdVhaq3d_l4d7-cL5aXbEXHReWZjUJWaWvcdPVhucjmD29ccGJZ_gUL7rH0mk4YrlmzFdbTIbzvSv4vBMHUW7V7F1ZY89bOt65-cr5-Wj7ePa3-_LQg0VxhbfU4JPcbGX-9yIf7h9XTbEai7GG1vLn7g0Tz97Pw9QrLx7vVzcfF7c3HmxWJsrvHj9PFkkTzKAmC94vyoeVbqJVsoJStlgJBdmbbmYEvCYbHfdra9oKxRxMIUxJlQUyiLEzg5i6_txCw2GPZGbSvhOYb2diy7YH9AnJOQNQZLnRfDaea8HbgfYH0vVU2THAHB0MVP0WE5i5YJ-2eQupFIy-Ov4nu4Mn_hIDeX_UX3HbNrvC_6APkex6sUBverq1DQgdImtAZhPAs1VdUGjyvZ82zm1vLdF6_UWZHvgd_vsM6QtMQZA3hEZYJ_fkHXLISOv5JdQgdg7VoMYdfUeN1wv5ynIyULtEMb5Abz9iqNuB5gjfceKVUCMHpc9vBmAZ2wPLLzhw-e3rNBfboEAajNB4nZzSldU9KozRNgtSRFFZcYWk83m47G7C8wh2hedsJYet4U3H1u9Pd013TMPXye-UQmt_3EHLKCN868beLtb__hZyxdYC2-bMv5YaLCgyqhre2E4LiBWx_ywSE4WttfrkSfnmFnHGBlUMl7TDDwkWUHTaUny33cyvd7wB7sOKN2wwCPwz1QUqvhIPEfuimcS2g7soSscLKH5aK5v-Dz7mvXm-upz05qypuuLQ5dNPW8nxO6MMSt1JzI9WL9eEPn4Bcs9_v5j780x5aKqxZJwz0XZwjRT58UmjhrLV4wVomXjTXx1w5tiA3rTuabZBVqMCi4gD538ycvgyfiq6uUfmb8xS1bU3_XXNhUOlhS2JKsRfgGvpeZzhv4d6gsn6qu7a0LvNhtUFoWYOWV2-x5DU_cFtNaymEfLbJWUvVMHNhzyA772nRYUPMazOT7U6KHZJoNiXRgoynDTOK721PHs0sNPWjuDeKgcG9IeP5fvZhQJzZpYhXC_QjUQbZjnHBCoHQE8FuJBqYQmB6UF6flSxAuk9dT5Hsw8S-RHQfUfuSjPbJyJFoug-p46Jxsqdxcml0zsXQtH03dGfn4Yuo5UMITgv15-vXXLeuUT1wxNE7W_2hLI5nbjuvlnZ7THlrgAOJ5hCQaOpeZ0BH7r0_iBE6ATKenma62S6XoHYzD4kVT7k9LUeXvH7dEpoWXW0xcgrBq-Ad_4708Dt06kB2Cn2FkmjmeXCecOP5-3DQY2NfX6yQO5sS6itWIHiLkNlwPm-wpw_2kQUlaUAmaX14m_SZX_EGWxtH63eXHi41-qywCUEzWy-sLFFrrOzafWA0rhtsDbOBBQcTQ0Vwfbz6GPDaFp6WqisRbPq4iDndhryAreSt2xa4hlYaYIdct-K4scO8heLFDAsQq13mFyWhE__tJpOVpVSVXc9IJ2jNDQi5hg3XDh3pDPq7HohTmo6YPYtREk_PboOiY7LHcwu7YPskQlN3IDqU7sSWnjqWAhxPtPaIa71WVVhZ1VV_lCY0j_09sNZdWyns7YVyw9o1AqttpJ6ZqvRg1KxX8qD2z4D6r19rud-r6jqqJtGEXeF1mEyCKA2DML3aXNNxkpRjVtVlPB7RUUIxYCM2YkGVjqoora_4tW2ggjFNwlGYxKlfTyY0iOIorCdlWY9DMgqwYVz4VnNfqvUV17rD62QU0smVYAUK7W4EKW3xGRzRhWt-pa6dtUW31mQUCK6NPq1iuBF4_fAmTQfAeMdRhZDFD3vpqlPi-sdu1QjNnRU2JM7KfwcAAP__ILAJ4w">