<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/117369>117369</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [Clang][OpenMP] Weak alias fails on OpenMP targets
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          Jason-VanBeusekom
      </td>
    </tr>
</table>

<pre>
    Reproducer test file:
```
int __One(void) { return 1;  }

int One(void) __attribute__ ((weak, alias("__One")));

int main(){
    return One();
}
```
When compiling:
```
clang -fopenmp -fopenmp-targets=amdgcn-amd-amdhsa test.c 
test.c:3:37: error: alias must point to a defined variable or function
    3 | int One(void) __attribute__ ((weak, alias("__One")));
      | ^
test.c:3:37: note: the function or variable specified in an alias must refer to its mangled name
test.c:3:37: note: function by that name is mangled as "__One"
    3 | int One(void) __attribute__ ((weak, alias("__One")));
      | ^~~~~~~~~~~~~~
      | alias("__One")
test.c:3:37: error: alias must point to a defined variable or function
    3 | int One(void) __attribute__ ((weak, alias("__One")));
      | ^
test.c:3:37: note: the function or variable specified in an alias must refer to its mangled name
test.c:3:37: note: function by that name is mangled as "__One"
    3 | int One(void) __attribute__ ((weak, alias("__One")));
      | ^~~~~~~~~~~~~~
      | alias("__One")
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: /ptmp2/vanbeuse-ptmp2/clang_install/bin/clang-20 -cc1 -triple amdgcn-amd-amdhsa -aux-triple x86_64-unknown-linux-gnu -Werror=atomic-alignment -emit-llvm-bc -emit-llvm-uselists -dumpdir a- -disable-free -clear-ast-before-backend -main-file-name test.c -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -mframe-pointer=all -ffp-contract=on -fno-rounding-math -mconstructor-aliases -mlink-builtin-bitcode /opt/rocm-6.2.0/amdgcn/bitcode/ocml.bc -mlink-builtin-bitcode /opt/rocm-6.2.0/amdgcn/bitcode/oclc_daz_opt_off.bc -mlink-builtin-bitcode /opt/rocm-6.2.0/amdgcn/bitcode/oclc_unsafe_math_off.bc -mlink-builtin-bitcode /opt/rocm-6.2.0/amdgcn/bitcode/oclc_finite_only_off.bc -mlink-builtin-bitcode /opt/rocm-6.2.0/amdgcn/bitcode/oclc_correctly_rounded_sqrt_on.bc -mlink-builtin-bitcode /opt/rocm-6.2.0/amdgcn/bitcode/oclc_wavefrontsize64_on.bc -mlink-builtin-bitcode /opt/rocm-6.2.0/amdgcn/bitcode/oclc_isa_version_908.bc -mlink-builtin-bitcode /opt/rocm-6.2.0/amdgcn/bitcode/oclc_abi_version_500.bc -target-cpu gfx908 -debugger-tuning=gdb -fdebug-compilation-dir=/ptmp2/vanbeuse-ptmp2/CAST-30331 -resource-dir /ptmp2/vanbeuse-ptmp2/clang_install/lib/clang/20 -internal-isystem /ptmp2/vanbeuse-ptmp2/clang_install/lib/clang/20/include/openmp_wrappers -include __clang_openmp_device_functions.h -internal-isystem /ptmp2/vanbeuse-ptmp2/clang_install/lib/clang/20/include/llvm_libc_wrappers -internal-isystem /ptmp2/vanbeuse-ptmp2/clang_install/lib/clang/20/include -internal-isystem /usr/local/include -internal-isystem /usr/lib64/gcc/x86_64-suse-linux/13/../../../../x86_64-suse-linux/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -internal-isystem /ptmp2/vanbeuse-ptmp2/clang_install/lib/clang/20/include -internal-isystem /usr/local/include -internal-isystem /usr/lib64/gcc/x86_64-suse-linux/13/../../../../x86_64-suse-linux/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -ferror-limit 19 -fvisibility=protected -fopenmp -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fcolor-diagnostics -fopenmp-is-target-device -fopenmp-host-ir-file-path /tmp/test-3dcfd8.bc -faddrsig -o /tmp/test-223d72.bc -x c test.c
1.      <eof> parser at end of file
2. Per-file LLVM IR generation
 #0 0x00007fe39a249c1d llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /ptmp2/vanbeuse-ptmp2/llvm-project/llvm/lib/Support/Unix/Signals.inc:723:11
 #1 0x00007fe39a24a0db PrintStackTraceSignalHandler(void*) /ptmp2/vanbeuse-ptmp2/llvm-project/llvm/lib/Support/Unix/Signals.inc:798:1
 #2 0x00007fe39a24827f llvm::sys::RunSignalHandlers() /ptmp2/vanbeuse-ptmp2/llvm-project/llvm/lib/Support/Signals.cpp:105:5
 #3 0x00007fe39a24a7ae SignalHandler(int) /ptmp2/vanbeuse-ptmp2/llvm-project/llvm/lib/Support/Unix/Signals.inc:413:1
 #4 0x00007fe397a3fdc0 __restore_rt (/lib64/libc.so.6+0x4adc0)
 #5 0x00007fe3a1efe2fc llvm::Value::getType() const /ptmp2/vanbeuse-ptmp2/llvm-project/llvm/include/llvm/IR/Value.h:255:34
 #6 0x00007fe3a1f8bff5 llvm::GlobalValue::getType() const /ptmp2/vanbeuse-ptmp2/llvm-project/llvm/include/llvm/IR/GlobalValue.h:294:65
 #7 0x00007fe3a287ddbc clang::CodeGen::CodeGenModule::checkAliases() /ptmp2/vanbeuse-ptmp2/llvm-project/clang/lib/CodeGen/CodeGenModule.cpp:736:61
 #8 0x00007fe3a287f0bc clang::CodeGen::CodeGenModule::Release() /ptmp2/vanbeuse-ptmp2/llvm-project/clang/lib/CodeGen/CodeGenModule.cpp:898:3
 #9 0x00007fe3a2a652dd (anonymous namespace)::CodeGeneratorImpl::HandleTranslationUnit(clang::ASTContext&) /ptmp2/vanbeuse-ptmp2/llvm-project/clang/lib/CodeGen/ModuleBuilder.cpp:0:18
#10 0x00007fe3a28401e5 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) /ptmp2/vanbeuse-ptmp2/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:273:10
#11 0x00007fe391c28e4b clang::ParseAST(clang::Sema&, bool, bool) /ptmp2/vanbeuse-ptmp2/llvm-project/clang/lib/Parse/ParseAST.cpp:191:12
#12 0x00007fe39ed0b057 clang::ASTFrontendAction::ExecuteAction() /ptmp2/vanbeuse-ptmp2/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1193:1
#13 0x00007fe3a2844692 clang::CodeGenAction::ExecuteAction() /ptmp2/vanbeuse-ptmp2/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:1140:5
#14 0x00007fe39ed0aab2 clang::FrontendAction::Execute() /ptmp2/vanbeuse-ptmp2/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1081:7
#15 0x00007fe39ec06ff5 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /ptmp2/vanbeuse-ptmp2/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:1062:23
#16 0x00007fe3a34292ba clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /ptmp2/vanbeuse-ptmp2/llvm-project/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:296:8
#17 0x00000000002487e8 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /ptmp2/vanbeuse-ptmp2/llvm-project/clang/tools/driver/cc1_main.cpp:286:13
#18 0x000000000023b8ae ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) /ptmp2/vanbeuse-ptmp2/llvm-project/clang/tools/driver/driver.cpp:218:5
#19 0x000000000023a652 clang_main(int, char**, llvm::ToolContext const&) /ptmp2/vanbeuse-ptmp2/llvm-project/clang/tools/driver/driver.cpp:259:5
#20 0x000000000026cc45 main /ptmp2/vanbeuse-ptmp2/llvm-project/build/tools/clang/tools/driver/clang-driver.cpp:17:3
#21 0x00007fe397a2a24d __libc_start_main (/lib64/libc.so.6+0x3524d)
#22 0x000000000023a11a _start /home/abuild/rpmbuild/BUILD/glibc-2.31/csu/../sysdeps/x86_64/start.S:122:0
clang: error: unable to execute command: Segmentation fault (core dumped)
clang: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 20.0.0git
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /ptmp2/vanbeuse-ptmp2/clang_install/bin
Build config: +unoptimized, +assertions
```

</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzsWk1z4yi3_jVkQ-GSkD_kRRZO0p7bt3pqujqZnqUKwZHMDQJdQOlkFve33wJJtuRO-p3uTmY240psGaHD8xwO5wPMnJO1BrhEqyu0urlgnT8Ye_nfzBlNPjN9BZ2De9NclEY8XX6C1hrRcbDYg_O4kgpQtkPJDUp2aJ0Mf_Gr1B4XxW8aEM0fjBSIbjHaXGELvrMapyi7whhtboaHj8_MnygK5r2VZeehKDCiOaL5F2D3iF5jpiRzsYkOA1FEt8NfdnUuuGFSx95btBluYoxHPP2wsyeP2ObE_jiAxtw0rVRS1y_R54rpGpPKtKCb9nhBPLM1eIeyG9aImmvCGhH-D45FnS447gX0X1C2y8L_BmU7DNYaGy4ic9x0zuPWBG7eYIYFVFKDwA_MSlYqwMbiqtPcS6NPfDOMNtf4DTSN4ysIR6t3L3LQxgeTwf4AR3AB6BG0a4HLSoLAUmOmp1wtVMHyDJbe4YbpWoHAmjXwH0c7jlQ-YX9gPj6F5UkKc3hK7m_W1v9NX-f3XxD3r5H8ayR_zUg-fni3u32HXVc20mOGy67GFlpjo0kcvG9d8GJ0j-i-lv7QlQtuGkT3Sj2MH6S15n-Ae0T30rkOHKJ7zHTQP1edgDhV3DJ3wCXj994yDoFma0PI4OAcCOxMZ_vm8CRzznDJPAhsO40dt7L1ix7yrWf8HouuaY_-NVngj9bUljWY2bprQAcvusOI7lvftBTR_QPTZYhXZGyITriQ2nmmFKL7MkSAvpXQBBPOU0y8la0C_LU7Jqx7HO8-5utivSSdvtfmiyZK6u6R1LrD5I9hwd0wbxrJCVOy1gEdJtBIT6L2Sj791jlQ0nmHSWAopMWMYCKkC7ZNKguACVfALGHOkxIqY4EEtYIWmIQ4RkLkJdE-h6BBGgvKcBYMmDRGgMKt5Ji0khMFD6AwxaQ6MFURbYiDhmkvOZHag22Nk9HwSVNZ1gCJ_gIiKaUwqaqWcKPDpHqU3YSOlTbEmk4LqWvSMH_ApOFGO2877o0l0R7BYdIoqe9J2UnlpSal9NwICJNm2mBM1vCGrBd0kSC676cgzlPsFnrxRi2C9n5ajuKFYH8WpvWFqapXk9lpxyooggpeVW4ltfRQGK2eXlUuN9YC9-qpiNMHonD_a31h9KuN8IU9QGWN9k7-Cevla4qWjhUPYJ00utgm-avJZaU8yl0lSZTbJ2qEtx2uq8dtkmMioOzqGizxnY6p300tSkyq2E76lLBfgEKGxfMt13S9u70jWZJlKSYWes8YHvsuf6ZkObYiug8eLa5bzRSR7sl5aH5KXHD2vXuP6gz5a_HFsrYF68JQvecvil7O0EHAg-RQjMHULQ5viSr400LJks-AvclozwvunA1PGc7UX-wqy_UyRFrOEd0PccUFSDGoILpPM0T3i8XXb891_npEeAwXfDryX-rUw_smg3-1-L1arGJ2QJQMqVe6xaR6kE6WUkn_hLKb1hoPPKRAk0qx1h0ngztC2c1yQRcpJpW7ly0xwhJ-AH5PpCZ1U2FScaOMJUKyWhvnJXenYlO60Y31q_J052CcJ9L2eUQb4jeie9-04R2cJ5nglegdbMWEsE7WmJizTpRmYkNjp0fMh0ykz9bSxZCbZtdgKpS9wy2zDixmHocsxlT95kHsTBf4I_RY8IcPn3_F7z_hGjRYNqlKEM0SnDwmSZJsKsi2jC63PBU4JqnZDmU79-T6i49Wah9TyLs-D81PnSz7UhjnLbAG0XXIRaX2cW_iG-Z9lgGPeXE08tuuDak0ovvftQy2dCtrzZRbSB3KjA0NhUaanlikZyxYIkp8BrmX8V9MCwX2WFHs3hLnNg84TzDpGcycbqrnlP2p0zO0fRXyGjhHgLwNVUCarFC2W50AZud63DDA54p728ldptlcacsppg3LKsETXBQWnDcWCuv7KvDovkLkWjizWCN6lTwumeDJsWwL8lYTeSyFCmjFJ5PwmakO-ssa_N1TO-xh4ZiK_wDreWBFdP_-E6L7OMzigLIdXYVJyJYnhOsZwiovq2o1QfiLMiVTfxPOyWA92u0SZbv1xGY2U7Q03whRctyHqYju2gj4BfTsy69GdGpAH13vrq9tvt_Ox3jY29Y41vGqH2gw9022DtgntpWfYa-S78P-CRQwB28LO49uJDuh3s5Qs_WKChEWAdNGPzWmc3GXxbXRT29n4IP_N_Z906q-uV_Vd5Zp16fZv2vpEc0nOtjd3l0b7eHRR-f-KjR7fledVALsQDMJyz4fNn5plibzuVkmKaymc3PVF-_XRruuCYX1P8hnuNrF9HzgQzfRkSUnRrMolXKaw7KcMvoYwvnu9m6O9xYaNoTV0hh1-vwJ5HGk8XN3ezfGg20a3ukJ8ixigUjKZLXBc2XuQ10KWvTk--Z3j8A7D0PTT66OcYDJ5UzRabqdhIyAOjszneV6S59Z1m-G-NuGkabL5BR2A97lmZYZK2d4v6HiN1dukgeb2JzArmZgebIO0Wmm3FCzg30fKhfN4Xn9vszuJxflhNA5kiOlNQ3rMztxmkXcbEm3tGRTTgP6k8CHYVtwzuQr6t-dXj7P5S6u9_2LKEaPsw3xbeJCx9Dcv-gy30COOU-L4dzulFPsrGVPn6BC2TU_MNsnEQF-9i44nHkbvcY_ljyP7LwxyiG6F1Y-hJRyP2IaieSBSDqZoHzOJCtzBnjUx3XaK2jC57ZhSn0Gfgx2z9CKLvX0SJAxBIax349a4lf8-ouRXZrPl__2jFyI6L31jRMVU-5-GqLWd_8U9NV2Bp0mc-hrzpereCr8PWOXIQ-YjP2ymcRThhmidHPKjQKgdF4tUEaXAhf9dpbzzPpiQPdyyZCt6FIcS4YglJ5PUJoy3IsLPA-mCcGUjTxs24yXV7-__3CD6L4OQxC6yNJAw3Xjxol7cgJad9xCCU1B7OI2BmIa86LT4ffsMLLT8dzOGwz9QsDcNA3TIty8hboB7aN7wBXrVCyTuLEQj4DgRPBrwf05ezU4n1EqrphUILDo4pguVm1BaOcAk4fYBoDlxDdOR8DD7gumySJZJLX0_c27uJkShn3pPGjod7DABI7HMKF3a5x87G-97_fIQNxI-yPHV1FITEbD6qlk3Qu56rRpvWzkn0Fb16GFOQc2bsE--wOFC3GZiW22ZRdwmW4ymiXrJF9fHC5zsa2qcrPerNiW0TxZcpazckOr7RY2yyy9kJc0ocs0pZQmSZ6sF0my3tBstaRiBVXFt2iZQMOkWoS1szC2vohnhpdpusnW2wvFSlBu_MWJvexPyLraoWUSz8VOz3npVfxtynWc-NUNWl391oL-9SNa3eA_gN0PR79hvh02Gvd38fAzi4vOqssfP-EcAD9c0v8PAAD__yGuLdw">