<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/74634>74634</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [openmp] Clang assertion failure with `declare target indirect`
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang
      </td>
    </tr>

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

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

<pre>
    Triggering the assertion involves template functions and function pointers.

The assertion message is
```
llvm-project/clang/include/clang/AST/Decl.h:275: llvm::StringRef clang::NamedDecl::getName() const: Assertion `Name.isIdentifier() && "Name is not a simple identifier"' failed.
```

Test case: (`indirect.cpp`)
```
// Compiler assertion does not trigger unless "indirect" is present
#pragma omp begin declare target indirect
template <typename T> class Cmp {
public:
  bool operator()(T a) const {
    return a == 1;
  }
};
#pragma omp end declare target

typedef bool (*func_ptr_ty)(int *);

template <typename Cmp> bool func_wrapper(int *a) {
  Cmp c;
  return c(*(int *)a);
}

int main()
{
    int i = 1;
    func_ptr_ty f = &func_wrapper<Cmp<int>>;
}

```


Compile command is `clang++ -c indirect.cpp  -fopenmp`.

(It's interesting that even though `declare target` is an offloading construct, the assertion occurs even if no offloading is specified on the command line)

<details>
<summary>Stack Trace</summary>

```
clang++: /home/mdewing/prev/software/llvm/llvm-project/clang/include/clang/AST/Decl.h:275: llvm::StringRef clang::NamedDecl::getName() const: Assertion `Name.isIdentifier() && "Name is not a simple identifier"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.      Program arguments: clang++ -c indirect.cpp -fopenmp
1.      <eof> parser at end of file
2.      Per-file LLVM IR generation
3.      indirect.cpp:7:8: Generating code for declaration 'Cmp<int>::operator()'
 #0 0x0000561ab89e6810 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/home/mdewing/prev/software/llvm/usr_main/bin/clang-18+0x224d810)
 #1 0x0000561ab89e3c1f llvm::sys::RunSignalHandlers() (/home/mdewing/prev/software/llvm/usr_main/bin/clang-18+0x224ac1f)
 #2 0x0000561ab8931b48 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x00007f5947642520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007f59476969fc __pthread_kill_implementation ./nptl/pthread_kill.c:44:76
 #5 0x00007f59476969fc __pthread_kill_internal ./nptl/pthread_kill.c:78:10
 #6 0x00007f59476969fc pthread_kill ./nptl/pthread_kill.c:89:10
 #7 0x00007f5947642476 gsignal ./signal/../sysdeps/posix/raise.c:27:6
 #8 0x00007f59476287f3 abort ./stdlib/abort.c:81:7
 #9 0x00007f594762871b _nl_load_domain ./intl/loadmsgcat.c:1177:9
#10 0x00007f5947639e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#11 0x0000561ab91a5d65 clang::CodeGen::CGOpenMPRuntime::emitDeclareTargetFunction(clang::FunctionDecl const*, llvm::GlobalValue*) (.part.0) CGOpenMPRuntime.cpp:0:0
#12 0x0000561ab8d9fccd clang::CodeGen::CodeGenModule::EmitGlobalDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/home/mdewing/prev/software/llvm/usr_main/bin/clang-18+0x2606ccd)
#13 0x0000561ab8daa8ab clang::CodeGen::CodeGenModule::EmitDeferred() (/home/mdewing/prev/software/llvm/usr_main/bin/clang-18+0x26118ab)
#14 0x0000561ab8daa800 clang::CodeGen::CodeGenModule::EmitDeferred() (/home/mdewing/prev/software/llvm/usr_main/bin/clang-18+0x2611800)
#15 0x0000561ab8daa800 clang::CodeGen::CodeGenModule::EmitDeferred() (/home/mdewing/prev/software/llvm/usr_main/bin/clang-18+0x2611800)
#16 0x0000561ab8dad104 clang::CodeGen::CodeGenModule::Release() (/home/mdewing/prev/software/llvm/usr_main/bin/clang-18+0x2614104)
#17 0x0000561ab9c18832 (anonymous namespace)::CodeGeneratorImpl::HandleTranslationUnit(clang::ASTContext&) ModuleBuilder.cpp:0:0
#18 0x0000561ab9c159e5 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/home/mdewing/prev/software/llvm/usr_main/bin/clang-18+0x347c9e5)
#19 0x0000561abad3e449 clang::ParseAST(clang::Sema&, bool, bool) (/home/mdewing/prev/software/llvm/usr_main/bin/clang-18+0x45a5449)
#20 0x0000561ab94a3519 clang::FrontendAction::Execute() (/home/mdewing/prev/software/llvm/usr_main/bin/clang-18+0x2d0a519)
#21 0x0000561ab941f1f5 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/home/mdewing/prev/software/llvm/usr_main/bin/clang-18+0x2c861f5)
#22 0x0000561ab956d9f5 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/home/mdewing/prev/software/llvm/usr_main/bin/clang-18+0x2dd49f5)
#23 0x0000561ab7560359 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/home/mdewing/prev/software/llvm/usr_main/bin/clang-18+0xdc7359)
#24 0x0000561ab7558343 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#25 0x0000561ab926821d void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::'lambda'()>(long) Job.cpp:0:0
#26 0x0000561ab8932010 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/home/mdewing/prev/software/llvm/usr_main/bin/clang-18+0x2199010)
#27 0x0000561ab9268a9e clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const (.part.0) Job.cpp:0:0
#28 0x0000561ab922e8ca clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/home/mdewing/prev/software/llvm/usr_main/bin/clang-18+0x2a958ca)
#29 0x0000561ab922f39d clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/home/mdewing/prev/software/llvm/usr_main/bin/clang-18+0x2a9639d)
#30 0x0000561ab923ac34 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/home/mdewing/prev/software/llvm/usr_main/bin/clang-18+0x2aa1c34)
#31 0x0000561ab755d840 clang_main(int, char**, llvm::ToolContext const&) (/home/mdewing/prev/software/llvm/usr_main/bin/clang-18+0xdc4840)
#32 0x0000561ab74b0663 main (/home/mdewing/prev/software/llvm/usr_main/bin/clang-18+0xd17663)
#33 0x00007f5947629d90 __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#34 0x00007f5947629e40 call_init ./csu/../csu/libc-start.c:128:20
#35 0x00007f5947629e40 __libc_start_main ./csu/../csu/libc-start.c:379:5
#36 0x0000561ab7556f85 _start (/home/mdewing/prev/software/llvm/usr_main/bin/clang-18+0xdbdf85)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
clang version 18.0.0 (https://github.com/llvm/llvm-project.git 3cd2a0bc1a2dcf851f1821765946b77d0e65bd2e)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/mdewing/prev/software/llvm/usr_main/bin
clang++: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang++: note: diagnostic msg: /tmp/indirect-34385a.cpp
clang++: note: diagnostic msg: /tmp/indirect-34385a.sh
clang++: note: diagnostic msg: 

********************
```
</details>


</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzkWt1y46izfxrlhopLQt8XuXCceHa2ZnemEu-eSxeClsMZCVSAMsnbnwJkWzhOarMns_X_qMpoLGiaXzfdTdOIaM13AuAqyq-j_OaCjOZBqqueqO8MfnCxu2gke77aKL7bgeJih8wDIKI1KMOlQFw8yu4RNDLQDx0xgNpRUNulERHs8IYGyYUBpRdRfBPFS__cBLx60JrsAHE90RTx9Odeu-6xvxyU_F-gJsJr2hGxi_CaC9qNDGYty_tNhNc3QLvFQ5QucZlH6RLZ4VG6jNLlvbGC3EGL_AjX-Dvpgdkx_nUHxrZEuIpwjagU2lgmywPYqIgtwYLrzwyE4S0HNVFHuIhwgSKMLQXiGglpEEGa90MHiM_ocYRL1BLeAVucFXrSE2iDKNFgMdhZipgLxhVQs6DDYKlxfX48Xkd4jVayH3gHaqZtJsEDM35t0Sg60NrC3vOOMLboBwUahNkzTAdFdj1Bsh9QAzsuEAPaEQXIELUDgw7D3YCDYUTpyjwPIKxONlF6a7WvNVr1A4rKa088jE3HqV0C94pQI2WH5ACKGDnpN8LVBpHDshwHI4SQAjMqgQiK0psovUFJlB56o_JmkqG8OTSH8oBgJ9LMl8HCZ9B6UA7M0tr3djBqa549NC4MivDSvhymeF0Pq36wmnAMHasfigyDs6SJkRN0JqJVF50JNQlMPZwAAAlAHIR3T0vVEy4mlU4kM0VaAo5OVYjQTGDUuv4IFwH0dOWkWnFhovTW_Z3HcNbU_XOyV0Rl39swwrV1uMnBryN8jS4pmrsAQpetHED01hmCGBPh6rOJcKmRC0CgjY9ixCB4BIHMgxx3D5b9ycIXsZ2WCCTbtpOE2WHO4tRoXWN1EgklpaPSnidvkZDzcVwjPQC1Xs-QFG7oXraOCziugX-mKwaG8E5b9e2b9Nj3RD1H6e29IfQ72ihCIUpXEV4fu95Q8Ex9Po6sH6QNceveh_oIrwcFj5adbM0PomyfC5v-v__84Pvty-3y_hbpsem5HdSMO6RgkMogI9GDMYO2CF1M3XHzMDYLKvtXtcS1HkHb-Ots2OvKr70i-gE1hH43bhHxykbZQUkKWgNDWo7KN9uRRGtJOTHAkBoF0lTxwUyQvSmw0brctOzW_utvSu4U6RFRu7EHYSxw9JYDHfzH8UgsjyhdgWxtgBqI0nb3MC5Cyha1vANPid1soC5tE_ry5c_f0Oc7tANhYzaXwlOllirYs9JlGaXLysL6NBE7B2OAWqmmKEz8cuMyDCnWSE43hXKKURFOYxQ_xXEc50VCmqqGokrimQnqZ-1_fFNcGKdA70q4OhIp8mMrtVFAemdSKxs-vIFV7_KcUautj7Trxj3dIlwmVYSv4yeMM1Ylx-3bwk9O4Kc0ac_BvxvFPd8J0v1CBOtA6YMLfDBCQpM2QIhDhGnSZBVaWZu-AyofQT0HwPyuZKEFNCspDDztrSF2_w5TpNMUZZvXWVlkOMfxJFnHmwivn6piW2SXHRfj0-VOjL6DLrRcFA64GxLAzkKedVG3FG23g3lQQNj2O--6rQsT1mG86S0ivBaD6az-ZmQLm6NkmTXi4sg__yv87SYkSPcm59K6RTLTRnGO83zYm-yq-oRdearcrCzQTrs1c5z8zwivF-7tWTMYbCAbpOZPEV4rwjU43th68UwHVcgaV2WbItLYEOpYGeaXzzV5dImLBQcO9QsOSYO2otvazXTLpDVVx4sLJ65t7vWOEs8uSUoLqT6kd0kcMkxrqIv3mZIbctyjcZoEPlonJGdFPt_RVpLBJxDTy6evA4jfvt2NwvAefCP03Nz4jGPjEo71dFSKcDVjtG-1pNNWaJO71SwgfOpkQ7o_STeCT_yscIuBKLOIndOF07_0NytQ6NKsbillrwvkX36TbOwmcW57bjyQG2i54C8l2ffS7i_A_8gAVsQFpSxYvjSUlpCKNO-V9gZaUArYz4m6RZJUpAlAZy9Ax_G_Hug4DkDn_46gixPQLImz94C-gw7saf0n4c2SOAvwlkE0oklVpdhOS4QUz70cNbKnTT24JKcOYPsk6nM_TLm337I3igjduS3wD8FN6MjL-820dbvMqEZe9OuRdwzU-fBSnSDMawji5TWh30GwlRR67O0h8u9i-Vhlp1lJa8gDZddzUQhLIcvquSjfbK7sjkFzoPfQkymRtKf94_8fDTnLSZ5l9RwyDhLiOiNpngSQ18rqULCl34C84z0BHc1PsmEWkzwJMYY7apa0SXuyo_oS1mehDREUApTLcztnKNTPMA9MqyJpA_PAwUZa5wWrQzkmxEdxHiUlL9G_EPenbI2MZfUJ_mBrLPMiTvMaUZpMbGZHpKVS5PkO2ihd0QeijtlJemvNO2zDK_QoOfspYjBapnloTVkoRV6lWYr2ql8lG-d6M1nue9J1fwI9xMIzIhVh3mJ5TLFnT-dMjCn--EoYxMFuWOOiwglzepnx3ZfMt8qp1vVOh9z92ZeSrmsI_b5thUV6tBo_92RBq2TlS0ynDn12CbVh-4O1nZ1YHZwp20wlPbxChwHbLX16ShL_0hDN6VY78kmLAbFt2BpFuNH77hN2pOusR0g167cky2PMXM7rQq4iU3akbxiJcHlUFa46ac2qRr_K5vx6FCcHWRwHlYJzx9Xj2Zu00D0H6nx76T7efZO6jpMgdcHlqYWRGtB_s4WcHIZeNYUwQ8EYKkpeVZwLzuTFZrnXZhDJTwa6mu8xXqzemGNOugySh5lsH2lPpM4rSgJ7qk_U0qY1e69afpWNfl0nv8rmC9cm0MlbgflgBgPhaioKvkONk638E8os0jo4doaFyRqnhKbZa8BvZr-DnOFMsvDaIvyDyvzw2EZIQtPgmBMWRss8Z1U2nSX3yckevospyxeVkte27I9OR7IqC6JyWDAtsyYuitTdv3301ElZFGkw9UkhFdesjtF22_HGBmGizNZmE9tDVY3q8WXdb6osnhvkrnlyV7AsjrNmp7OCXSriCqDcnE7kf1rul467L-RhyxQfQ_RpfdUzDUQ5J8VZ5mlpj8H5kXdxYltFW-XIc_3oNWpYWx1z7pNbOVDK7mvTXQ1qp0PM4bbQ31ehH9w8IHjixt-YJGlmUY4a0OUjMhJpAPdtxv5oMZ8MPYLSXAqUVIt44arq77vaWuy4QSllmMQNTQhmtK3ypE0qnJRFXmdFU5YshiJvGD5ebfoqpxVtqreO4ruQP8Ss7jp9FKKAMNRLBp2l9jVn1-UOQ10H7Iard19hnqzKOeULadwnFoyTnZDacIp6vXMzTYby__ibXcxO94zLzWa5-gVtfrlF669fvnz9n8-_f0Lrz19u79Hmq2u-_uMTurv99vVuc7jd-3bunrDSNoy9eld4IFCAXOoEDBFzYPnXtYDXph9c6d3f5F2mWVrlxGVUH8RKP_y9pfmoBTr5KMFdr7-4jHfPC3aVsjqtyQVcJWWcVFUeF_XFw1WCy5SWZUtzKBOc07TGRQ1ZkWUsaQjOL_gVjnGa4LhIyjyJ6wWtWRwncVJBUgBt6iiLoSe8W1jbXUi1u3B3yVdlVqTZRUca6LT7ZAvjSU84ym8u1JVz02bc6SiLO66NPnIw3HTuO6_pnje_QSsXDo7fMNjgMirw0eXFFxHHD3uK-GJU3dXfvxB3cvxfAAAA__995pJM">