<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/112099>112099</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            how to get cfg
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          6eanut
      </td>
    </tr>
</table>

<pre>
    I am new to llvm. I was recently trying to generate a cfg diagram of a c program using llvm. But there were some problems.
**environment:**
`ubuntu@ubuntu:~/code$ uname -a
Linux ubuntu 6.8.0-45-generic #45-Ubuntu SMP PREEMPT_DYNAMIC Fri Aug 30 12:26:41 UTC 2024 aarch64 aarch64 aarch64 GNU/Linux
ubuntu@ubuntu:~/code$ cat /etc/os-release 
PRETTY_NAME="Ubuntu 24.04.1 LTS"
NAME="Ubuntu"
VERSION_ID="24.04"
VERSION="24.04.1 LTS (Noble Numbat)"
VERSION_CODENAME=noble
ID=ubuntu
ID_LIKE=debian
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
UBUNTU_CODENAME=noble
LOGO=ubuntu-logo`
**test:**
i wrote a c program
run the command "clang -S -emit-llvm test.c -o test.ll", and then got a test.ll successly
`ubuntu@ubuntu:~/code$ opt -dot-cfg test.ll
opt: Unknown command line argument '-dot-cfg'.  Try: 'opt --help'
opt: Did you mean '--dot-dom'?`
or
`ubuntu@ubuntu:~/code$ opt -passes=dot-cfg test.ll
WARNING: You're attempting to print out a bitcode file.
This is inadvisable as it may cause display problems. If
you REALLY want to taste LLVM bitcode first-hand, you
can force output with the `-f' option.`
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJyUVU2P4jgQ_TXmUkqUOCHAgQPdQC9aGhANs-oTKhKTeNexI380y2V_-8pJ6OmZ2R7NShEJ9fFele1XRmN4KRmbkuEDGc4H6Gyl9DRjKJ0dnFVxm64Aa5DsClaBEG91CCu4ogHNciatuIHVNy5L7y6ZZBotA4T8UkLBsdRYg7p4AzRatX-d8eEd1IOzYCumGVz9j1E183FnwWoTkmhOohmh_mHyjWslayYtSXpb788id3bSOpLeP5LZP4Quc1UwQlNwEmsGAXbhay7d39AFQhaOwyhIh0FbOc-B0CQdBsfO-_K8g91-sXjeHU7z183sefUIS81h5kpIIogpSWY0I8ksjeF4eAQa0RQQdV5lP76fNkdCly17V8jPi87RAqFLZnNCl8oEmgmGhkGXu9svDofX02b2vCDJnFDaV0zTMErDGNaHF0JpF_t90Lvjy2L_stpuTqt5526Tv_d-cHW4QOh44zcINq4-oyV08gPi43a-6GmlD-28LU_fbG84rVe_-6iCnTnKzvrb9nlxOu7XHXNlbWPaHV8Surxer2GHEOaqbm099ctxt9vuD58lVkw0n2Q-HJ9O-8XPks-uNKFAJ_OqwSKUzBK67Bv5ALTbr77MHl9Pu-169fj6yy0IVqIgdGmZrk2AsggaJXjOmSF02Wj-hvmtM93eqY4Px83h-Mk6r7dP2_eVDoQqFcmij1qyzHwvIg5XrTrh3nXaObSTXqCQq7pGWQChNBcoSwheIGA1t4EXMnjIMIdAdV9C-FLpI_gUWzEJpbKAdycYl-fMGHH7RQmrxkJQKBv4sXJnaFNV41uBo_xLqqt8L1NwyQB16fzAAEJH92xCRyHAQd98FqGjFjnwx4PQ0TeQc17ATTmoGcoWoYUo_J6NSLJ8X1Ol_08TDRrDjD_y_9XNH7P9ZrV58vSvyhE60gzQWlY3th-xjebSgnJ-Nc_cemy4cMH6YXmouAH_SCzeuEGvUzTALdR4gxydYVBw0wi8fZ2zsLp02b7d_WK2Xr_CFaX1fBaNZbBef3n-QKeNDSqUhd_hm-rVnKOEi9I589U1zsKV26o9OySLgguhI78CXMmQZNGgmCbFJJnggE3jER2P0iwd0UE1HeZplp9ZMk4maY5FMrqMs3wyicd0hNH5Eg_41I_ZOIppPKRxTMPhuMAkm2CUxUPMcEjSiNXIRdjeMEqXA26MY9M4ptFkMhB4ZsK09x2l_lprvf64DucDPfVJgRc8SSPBjTVfYSy3gk0rde2uOuvvuIHTYvqtwEtuK3e-i1u83V9Bo9WfLPezo6X08u5repvSfwMAAP__Xx5Szg">