<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/166333>166333</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            LLVM out of memory in clang that does not happen in GCC
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          mariete1223
      </td>
    </tr>
</table>

<pre>
    ## Assertion

```
No assertion
```

## Stack dump

```
Stack dump:
0.      Program arguments: /opt/compiler-explorer/clang-trunk/bin/clang++ -g -o /app/output.s -mllvm --x86-asm-syntax=intel -fno-verbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics -x c++ <source>
1.      <eof> parser at end of file
2.      <source>:1:5: LLVM IR generation of declaration 'main'
3.      <source>:1:5: Generating code for declaration 'main'
 #0 0x0000000003d11b38 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3d11b38)
 #1 0x0000000003d0f50c llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3d0f50c)
 #2 0x0000000003c55298 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x00007d4aea842520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007d4aea8969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #5 0x00007d4aea842476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #6 0x00007d4aea8287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #7 0x0000000003c5fdb1 (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3c5fdb1)
 #8 0x0000000003c8c781 llvm::SmallVectorBase<unsigned int>::grow_pod(void*, unsigned long, unsigned long) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3c8c781)
 #9 0x0000000004091bfc (anonymous namespace)::ConstExprEmitter::EmitArrayInitialization(clang::InitListExpr const*, clang::QualType) (.isra.0) CGExprConstant.cpp:0:0
#10 0x00000000040924c3 clang::StmtVisitorBase<llvm::make_const_ptr, (anonymous namespace)::ConstExprEmitter, llvm::Constant*, clang::QualType>::Visit(clang::Stmt const*, clang::QualType) CGExprConstant.cpp:0:0
#11 0x00000000040940b3 clang::CodeGen::ConstantEmitter::tryEmitPrivateForVarInit(clang::VarDecl const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x40940b3)
#12 0x0000000004094246 clang::CodeGen::ConstantEmitter::tryEmitAbstractForInitializer(clang::VarDecl const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x4094246)
#13 0x0000000004543f84 clang::CodeGen::CodeGenFunction::EmitAutoVarInit(clang::CodeGen::CodeGenFunction::AutoVarEmission const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x4543f84)
#14 0x0000000004547b0c clang::CodeGen::CodeGenFunction::EmitVarDecl(clang::VarDecl const&) (.part.0) CGDecl.cpp:0:0
#15 0x0000000004547d3c clang::CodeGen::CodeGenFunction::EmitDecl(clang::Decl const&, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x4547d3c)
#16 0x00000000041a5ee4 clang::CodeGen::CodeGenFunction::EmitDeclStmt(clang::DeclStmt const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x41a5ee4)
#17 0x00000000041b9e81 clang::CodeGen::CodeGenFunction::EmitSimpleStmt(clang::Stmt const*, llvm::ArrayRef<clang::Attr const*>) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x41b9e81)
#18 0x00000000041b2246 clang::CodeGen::CodeGenFunction::EmitStmt(clang::Stmt const*, llvm::ArrayRef<clang::Attr const*>) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x41b2246)
#19 0x00000000041b98d9 clang::CodeGen::CodeGenFunction::EmitCompoundStmtWithoutScope(clang::CompoundStmt const&, bool, clang::CodeGen::AggValueSlot) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x41b98d9)
#20 0x000000000421aef5 clang::CodeGen::CodeGenFunction::EmitFunctionBody(clang::Stmt const*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x421aef5)
#21 0x000000000422bfc3 clang::CodeGen::CodeGenFunction::GenerateCode(clang::GlobalDecl, llvm::Function*, clang::CodeGen::CGFunctionInfo const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x422bfc3)
#22 0x000000000428a75b clang::CodeGen::CodeGenModule::EmitGlobalFunctionDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x428a75b)
#23 0x00000000042860f4 clang::CodeGen::CodeGenModule::EmitGlobalDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x42860f4)
#24 0x00000000042869f3 clang::CodeGen::CodeGenModule::EmitGlobal(clang::GlobalDecl) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x42869f3)
#25 0x000000000429062f clang::CodeGen::CodeGenModule::EmitTopLevelDecl(clang::Decl*) (.part.0) CodeGenModule.cpp:0:0
#26 0x00000000045e9791 (anonymous namespace)::CodeGeneratorImpl::HandleTopLevelDecl(clang::DeclGroupRef) ModuleBuilder.cpp:0:0
#27 0x00000000045d3489 clang::BackendConsumer::HandleTopLevelDecl(clang::DeclGroupRef) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x45d3489)
#28 0x000000000625b824 clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x625b824)
#29 0x00000000045e6825 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-trunk/bin/clang+++0x45e6825)
#30 0x00000000048e4c2a clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-trunk/bin/clang+++0x48e4c2a)
#31 0x000000000486496b clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x486496b)
#32 0x00000000049dcdfb clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x49dcdfb)
#33 0x0000000000ddc575 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0xddc575)
#34 0x0000000000dd44db ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>) driver.cpp:0:0
#35 0x0000000000dd457d int llvm::function_ref<int (llvm::SmallVectorImpl<char const*>&)>::callback_fn<clang_main(int, char**, llvm::ToolContext const&)::'lambda'(llvm::SmallVectorImpl<char const*>&)>(long, llvm::SmallVectorImpl<char const*>&) driver.cpp:0:0
#36 0x0000000004654899 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
#37 0x0000000003c556b3 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3c556b3)
#38 0x0000000004654ab9 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
#39 0x0000000004617682 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+++0x4617682)
#40 0x0000000004618561 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+++0x4618561)
#41 0x000000000462140c clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x462140c)
#42 0x0000000000dd8fa9 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0xdd8fa9)
#43 0x0000000000c83ec4 main (/opt/compiler-explorer/clang-trunk/bin/clang+++0xc83ec4)
#44 0x00007d4aea829d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#45 0x00007d4aea829e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#46 0x0000000000dd3f75 _start (/opt/compiler-explorer/clang-trunk/bin/clang+++0xdd3f75)
```

## Program

```
int main() {
    struct Number {
        union {
 int i;

            double d;
        };
    };
    Number uu[2147483647]{{0}};

}
```

## To reproduce:

https://godbolt.org/z/q8eaG6cbd
</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJzkWl1v27jS_jXMDeFAor4vcuE4cd4uuvv2NEXPpUFRlKNTitQhqay9v_6AlByJspzWXZ3FAifwYmt-zDzPzHBmRAsrVe05pXcgugfRww1u9YuQdzWWFdXURyi4yUVxvAMoACiAa6Wo1JXgwFubT-z1H2_9m4B4PDuaMp9u_7PG5Bss2ro5FzCaC8ycdwu87JMUe4lriOW-rSnXCgRrCNBWNBqgLRF1UzEqV_TQMCGpNGMM8_1Ky5Z_A2ibV_w0BtA9QPdwtYcrYUTgpjGCWt20-lbBVc3Yaw1Xq0Mar7CqV-rINT6A4KHimjK4KrlYvVKZC0XNPFw9w9VqT8hKC8HIC644CB7ehWYWK44b9SI0XJVEMCFXRYX3XChdEdXpIBKrF3f4AEmPHgQbJVpJKAgegbf2jY1AsKGiBMEjbLBUVEKsIeUFFCUsK0aBt0b9smFrsPZBsI6MNT9-_Por_PAZ7imnEhv3mZ0FJQz3XwFKakMPJcBbB-_Jeupl8D0koqCwFPKyJAhQ4EHv4J3-gsL38yCFxhEmBoK1OqruH59kxbWNkC8SEwpQOiyS-PedUFpSXAMUA7SBFdcAZRCg9M-ECkD33qHHBFDWI_ZdxF4ZeWQO8YZRzNvm__lzteeYAZS23J61AjJhVCyFzyIY8CEHH4kilKVwY2LqMyXilcpjB-j_MC-YUZP21nLWbATX9KBvSWNOo2f_6-QHvfykCDHFaYgi5PVMWJUDtD2k8S4OV6zi7WG15203QW6VuI0tZLtlABy6ArM4Kwls9IukuNh9qxi7TrrdP0iPpnDDJIZ7ZU1wLewwiQfBsSsYpUkZQJwLqa8TazcOYpOJ-8oi95cJlE7WoCl1NaUkSf1RID_XmLGvlGgh77GiINi8xa8JGHvuQbDeS_H7rhEFQOmrqAqA1uYATkL9bGCh2O9AD5SyMaXQy_y8JEYT5oIfa9EqyHFNVWMzSNafU8GVfjw08rGutKayGzVf1lLi4wde6Qqz6g-bwABKOxB2kZn7WHW7ITFyevqjNf9oMftybGjP-bZSEt969rw9mX1WPebTk2YSjTdhg0ISjEU_61p_rVQ1eGjwXo2_0Z2FtGu0NJiuNQPajILhhPIdfqeAsIhcOxmgP2Kf71rEn1gk9HLHIhtR0CfKXcyOX7U8mu-fZPWKNd0K-RVL40YX8FcsHyhhJ8zxUgHbQ-4C1hBCU0IojH-K0DpXWmKit0K-RaxN7n8RKxTGA6vAYRWFQZmG77CyX7YtJ_aEDcev1WLWO9_f3m99rCulTNuxOOOO08A4nDBOco9cz7h30A957bbBUp8SiVkwc1yiKaoi-AlU55AmeDYwF4ItaFuDc7Bt7LDwcUTpT0STwWzy0DmTcXZaLkI6nAOLxGWRZzT1r2fxXNUNo-c8zjLskLptFftMSxBsRhvWWo9KVvC4HG_LbOCdTnij9zPcJd5_a8bIyX7Z1NNpkV3PeCPqRrS8MDz_WekX0epnIkyddFPhsGrmRG4u6l3v918xa-kzE4s9KvVc3yyB3AYG-ZiW0fWWOI3ci-L4bgwsxKLDObBwmw6E8pK813TMsOifiqmZdBk8MZFj1mXYcQi_7T_rl1xtT6eFH3gplk9iHdnBFG67glKcRPn3TPGrKFpGB3d2lE-4H2hZmX5l2lpfMkw3bkN3UZ9bKgPRYEI09srv1px5on8bgobCQDCcEszK7wb1PMHLtJaDnpWjIHS7GpR5MSqvhf5FNB_pK2Xzvc1g-HGXNZZ03mwht02JaJZk_vcfuqxMkxyE_FA3rBvurmbex_gkRduYIocy2GG6bytWUDkDze09oiIIU6ci3WPyjfLCPF-09enB4loQy_R-Ftvga6d7iFGUp8g5h5-wVHT9_GVSF2iNJ3VwyQ61xzGgzCauj1M0V-fW48J2oKTVtB8yoJayoNX-hs29YA1TGhKEx9i2UnBNeTEDbklYneIBlltU0zjM4kkl6RR9sI-8hM5b7TKPBYtgB26A7hbBrCBF6UDvQQ4MXgWZuTw6Y7hgtu9ADZCdcuYVBYmSCBLi77rL-HS-d37Bk4Z5A90xtIFvd37LIO-gDcDDCfAwLHJ4MvDG_2JPdTp7adml0xkWsVtwjYz-ttvpoIcVH7iWrape6Wdabrj-pKVz1fZa9jf-24rR56PStO4fLwpZvc4l5CCa0ooSe6s6Ulr2DdJOWmeYyZ9hmr3dyxHMWI7Jt13JTw9GJ_fbHwA651pfrn_EQn0JAyhhuM4LDFDy0wBReronvn7_ZSu7FTmOwjTLbMBeNrOd7fLee4brJjrF_Wne-BtR15gX0xQ6e7aU7teJxmjHzImoZy0rvrcrH_uD97ZhtyOHg-93X3KsKrJTdnlvIGexGdhpiSutTtMTcZgxk52EHM2bJeuhaNrD3Zl9zuMTF2bwF5HPOGP6u0YU58H4gnnmx6du5nPLn3FJ2dGx5ft-W-z3BQtzSEfpNKJw7jRS_3MRMemR513vtkexn8Qpumg16yp81oucTOmU0MlGs8BJ4T-2dD25xHwj9ufrcMf1LX5Cb2KJNIr9ay3xi8jVZTP8IvKPlbpUyc5z6pvbG1zJrs5cY7k-Nv579jMWGuzndo0x8kP3mn2M9WH0b6clm-nFLtn9L7TfQp1fZ5PBYmjSaaQl7jPWnyv-C3V7Bs4A1m1TSRpQEkIDcxFtnbxB2-S9A5QV2ZUvMtgtg8BoKpCGHtztzJ6d0ljq3YjLD6ug4UhFPHFnUCYR7IQv5BEjsdc3-wZX_0LW-etbpkPtQ8rGR3IPvDWEECotW6Lhb22dUzkaN38tt28FdWNGQgWC-042HP0Vos0ZhUU3eRoFycMw4HzpdbUtiO6RHyZhGsRhAqIHoym598zi03rzSR4u8v0ioKSNFEXbPYTauRetG9v0oy1A270ocsH0rZB7gLZ_ALT9d0rxU0zy4qa4C4osyPANvfOTGKEwTKPs5uUuJITkPiJl4aGEZp6PfeLHURSVBJd-6t1Ud8hDke97oZeiJMhucRzRMg7SNCjzLApKEHq0xhW7NWfV6L6plGrpnR_HQRDcMJxTpuxrfQj1bkYgeriRd2bDKm_3CoQeq5RWgwhdaUbv7BthotVQlLCmtZBHWPEua0D9gjUsBFWQCw1fcNNQbmafNpubVrK7iWkq_dLmt0TUJrJNUun-t2qk-BclJlQtagXQtgf-eof-EwAA__9pui8m">