<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/61611>61611</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Build failed with CMAKE_CXX_STANDARD=20
        </td>
    </tr>

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

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

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

<pre>
    Building with `CMAKE_CXX_STANDARD=20` failed but with `CMAKE_CXX_STANDARD=17` success

```
gcc --version
gcc (GCC) 12.2.1 20221121 (Red Hat 12.2.1-4)
Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

uname -a
Linux be52cec1e796 5.15.49-linuxkit #1 SMP Tue Sep 13 07:51:46 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
```

Cmake configure:

```
cmake ../llvm -DCMAKE_BUILD_TYPE=Release -DCMAKE_CXX_STANDARD=20
```

Error message:

```
/llvm-project/llvm/lib/Transforms/IPO/AttributorAttributes.cpp:3499:38: error: expected unqualified-id before ‘const’
 3499 |   CachedReachabilityAA<BaseTy, ToTy>(const IRPosition &IRP, Attributor &A)
      |                                      ^~~~~
/llvm-project/llvm/lib/Transforms/IPO/AttributorAttributes.cpp:3499:38: error: expected ‘)’ before ‘const’
 3499 |   CachedReachabilityAA<BaseTy, ToTy>(const IRPosition &IRP, Attributor &A)
      |                                     ~^~~~~
      |                                      )
/llvm-project/llvm/lib/Transforms/IPO/AttributorAttributes.cpp: In constructor ‘{anonymous}::AAIntraFnReachabilityFunction::AAIntraFnReachabilityFunction(const llvm::IRPosition&, llvm::Attributor&)’:
/llvm-project/llvm/lib/Transforms/IPO/AttributorAttributes.cpp:3604:20: error: no matching function for call to ‘{anonymous}::CachedReachabilityAA<llvm::AAIntraFnReachability, llvm::Instruction>::CachedReachabilityAA(const llvm::IRPosition&, llvm::Attributor&)’
 3604 |       : Base(IRP, A) {}
      |                    ^
/llvm-project/llvm/lib/Transforms/IPO/AttributorAttributes.cpp:3496:8: note: candidate: ‘{anonymous}::CachedReachabilityAA<llvm::AAIntraFnReachability, llvm::Instruction>::CachedReachabilityAA(const {anonymous}::CachedReachabilityAA<llvm::AAIntraFnReachability, llvm::Instruction>&)’
 3496 | struct CachedReachabilityAA : public BaseTy {
      |        ^~~~~~~~~~~~~~~~~~~~
/llvm-project/llvm/lib/Transforms/IPO/AttributorAttributes.cpp:3496:8: note:   candidate expects 1 argument, 2 provided
/llvm-project/llvm/lib/Transforms/IPO/AttributorAttributes.cpp:3496:8: note: candidate: ‘{anonymous}::CachedReachabilityAA<llvm::AAIntraFnReachability, llvm::Instruction>::CachedReachabilityAA({anonymous}::CachedReachabilityAA<llvm::AAIntraFnReachability, llvm::Instruction>&&)’
/llvm-project/llvm/lib/Transforms/IPO/AttributorAttributes.cpp:3496:8: note:   candidate expects 1 argument, 2 provided
/llvm-project/llvm/lib/Transforms/IPO/AttributorAttributes.cpp: In lambda function:
/llvm-project/llvm/lib/Transforms/IPO/AttributorAttributes.cpp:7594:9: warning: implicit capture of ‘this’ via ‘[=]’ is deprecated in C++20 [-Wdeprecated]
 7594 |         [=](const Attributor::ArgumentReplacementInfo &ARI,
      |         ^
/llvm-project/llvm/lib/Transforms/IPO/AttributorAttributes.cpp:7594:9: note: add explicit ‘this’ or ‘*this’ capture
/llvm-project/llvm/lib/Transforms/IPO/AttributorAttributes.cpp: In lambda function:
/llvm-project/llvm/lib/Transforms/IPO/AttributorAttributes.cpp:7618:9: warning: implicit capture of ‘this’ via ‘[=]’ is deprecated in C++20 [-Wdeprecated]
 7618 |         [=, &AlignAA](const Attributor::ArgumentReplacementInfo &ARI,
      |         ^
/llvm-project/llvm/lib/Transforms/IPO/AttributorAttributes.cpp:7618:9: note: add explicit ‘this’ or ‘*this’ capture
/llvm-project/llvm/lib/Transforms/IPO/AttributorAttributes.cpp: In constructor ‘{anonymous}::AAInterFnReachabilityFunction::AAInterFnReachabilityFunction(const llvm::IRPosition&, llvm::Attributor&)’:
/llvm-project/llvm/lib/Transforms/IPO/AttributorAttributes.cpp:10543:69: error: no matching function for call to ‘{anonymous}::CachedReachabilityAA<llvm::AAInterFnReachability, llvm::Function>::CachedReachabilityAA(const llvm::IRPosition&, llvm::Attributor&)’
10543 |       : CachedReachabilityAA<AAInterFnReachability, Function>(IRP, A) {}
      |                                                                     ^
/llvm-project/llvm/lib/Transforms/IPO/AttributorAttributes.cpp:3496:8: note: candidate: ‘{anonymous}::CachedReachabilityAA<llvm::AAInterFnReachability, llvm::Function>::CachedReachabilityAA(const {anonymous}::CachedReachabilityAA<llvm::AAInterFnReachability, llvm::Function>&)’
 3496 | struct CachedReachabilityAA : public BaseTy {
      |        ^~~~~~~~~~~~~~~~~~~~
/llvm-project/llvm/lib/Transforms/IPO/AttributorAttributes.cpp:3496:8: note:   candidate expects 1 argument, 2 provided
/llvm-project/llvm/lib/Transforms/IPO/AttributorAttributes.cpp:3496:8: note: candidate: ‘{anonymous}::CachedReachabilityAA<llvm::AAInterFnReachability, llvm::Function>::CachedReachabilityAA({anonymous}::CachedReachabilityAA<llvm::AAInterFnReachability, llvm::Function>&&)’
/llvm-project/llvm/lib/Transforms/IPO/AttributorAttributes.cpp:3496:8: note:   candidate expects 1 argument, 2 provided
[ 65%] Building CXX object lib/Transforms/IPO/CMakeFiles/LLVMipo.dir/DeadArgumentElimination.cpp.o
make[2]: *** [lib/Transforms/IPO/CMakeFiles/LLVMipo.dir/build.make:132: lib/Transforms/IPO/CMakeFiles/LLVMipo.dir/AttributorAttributes.cpp.o] Error 1
```

</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzsWU1z4jwS_jXi0oXLlrHBBw7GwAy1-aAI2c2cUrIsQBsjsZKcDHvIb9-SbWLIwmRmKkNN5n1dqfijW63W04_UakS05kvBWB8FAxQMW6QwK6n6T0Qs__vUSmW27Q8KnmdcLOGJmxWg0E0u43-M7pO7u_ubeXw1jGdD5A-xi0IXFoTnLIO0MN_W9rpWWxeUMq2RO0RuXP8P3fqvfF1SCu32I1OaS9F8Qrj3KUkQjsDDDnY8wC7Gnoc9K5mxDD4TU4vaHYSjqmUiN1vFlytjtcrWthmMFWNwIxfmiSgGY1mIjBjbHU5gIqhTNZ6vuAauYWG1da2N_AFoxsCs7LdCUQYLqYDKzdYCRqXIuDWlHYD5iilmLVxdVxafiFJEmK01IqQB9shE2fxyNEs-x1fzeDC5mMy_gFQwnsyvRjc3ML6eQQzTeDafJLcX8Qymt7Pp9c3I2cewEGTNoE2qtwsuiq-QsgBTRj3WjUIIHC9wOlE7t6IHbvHwPbi5nMK8YHDDNuD54HaRHwce8uNOCLfzpALray-8Dzuvbp-ubhEelx0djWIN_5o8MIvJgi8Li138jcDTUtlxEB7n-eMa2sOKR4PbycXwfv5lOkL-cMZyRjR7Ef4_JU97M1JKKlgzrcnyDV9qH9obJf_NqKlf7Y2nCI_nigi9kGqtER5PptcIj2NjFE8LI9XuiWmHbjbIj_1OFNlbD_kxMOtE-fB1w6hhGRTiPwXJ-YKzrM0zSNlCKgZohFHPRVGPSqHN7q2mNViTgLoJACSErlg2Y4SuSMpzbrZxjPxkQDSbby2h53K-Rf4I4coUTGZTqUuOAsLhZDa1So379mP8MoGgvKqevuNCwej5-fn5_CC-wGU934H1obF8PsDyR-Ow6_NdYwATAeW4VUHL0b2A3h0QIcV2LQuNukM7t_w4jifCKDIW-3iOC0HLlfY7VHYglx6X-g3cCIcW6kbUuF2KGhI0E_1d6Ri6HeTH2D2go5CwJoaubCZY1MOo0gPJczDyDcRO0G9vkMfwOsRhUoenxHj0DbvvhG49h0K3s8dOi4WdNAj3dnPC5l7UHdixvk1oFIx-zRISIj_uVZEyNgUAJSLjGalefsPonMuT41HtRGEZokr16PJYxnpTpDmnUK2TZZiPx7he0l5dZwo1NMGu84YGD4haFmsmjEUHw0bJR56x7C_PvnPy7gj1_nQy2Eyak3WakZc88WvyVDeIbJ6yWRCeiBJcLO0jX29yTrkBSjamUAzkouGfWXHd7KEeOdmjZjBA_hAFw0bONWRsoxgldh_GBSQIDxAeYBdQMGj_qxHaZtW6YL06WPsbu7uFby_jVNSqQzNjm5xQZh8nYiHLHdZsgnByKq38mlyyj-uOUyTLLJcqYE-gebBrwvGhsA7Gh-Zb6PV-Q76FXu8Y33BS8ifnSxHHH4l9eyh_EPb9YN3A1Jt1w0mV37lu8Nyg4yM_DqPzFw6vATsEokH4XFVDicWrquHESE76v-_1TxYbP3x94OrkPSlwFjf-rkv-iLrkfXh3NsZ9kIokGEAYIBygYAgvRzbJ3R3I1PoIJ11LLskDG_Oc2U8XF_-85BvpZFwhPB4yku12O6Ocr7koT0as446s-l2TB4aCAbYbJssPHFd_dlf1M12m1nWntOrHno-t0Z-xcwpwR1qAql__vaM_97eyvp9FfkRarO-F3agTdiM3aq36hIa4Q3os9UmaRhinnV7addNumLkLErmLFu9jF_uuj7EbBl4ncjKXBJR2g27UzViP9FDHZWvCc8fSxZFq2eJaF6wfeqHntXKSslyXJ3EYC_YEpRBhi21L9UvGpcVSo46bc210Y8Vwk7PqoG53BFcev504FmkVKu-vjNloy3g8Rni85GZVpA6V6z0yH1K89MYCXXr7vwAAAP__bEKblA">