<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/70402>70402</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            clang crashes when targetting wasm32 with experimental-mv abi
        </td>
    </tr>

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

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

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

<pre>
    Minimal repro:

```c
float crealf() { 
    return 0; 
}
```

When compiled with `clang --target=wasm32 -mmultivalue -c asdf.c -o asdf.o`, it compiles fine. When `-Xclang -target-abi -Xclang experimental-mv` is added to the command line, `clang` crashes with the following error:

```
Stack dump:
0.      Program arguments: /workspace/wasi-sdk/build/install/opt/wasi-sdk/bin/clang -mmultivalue -Xclang -target-abi -Xclang experimental-mv -c asdf.c -o asdf.o
1.      <eof> parser at end of file
2.      asdf.c:1:7: LLVM IR generation of declaration 'crealf'
3.      asdf.c:1:7: Generating code for declaration 'crealf'
 #0 0x000055cd3e5e46b8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /workspace/wasi-sdk/src/llvm-project/llvm/lib/Support/Unix/Signals.inc:723:13
 #1 0x000055cd3e5e28a0 llvm::sys::RunSignalHandlers() /workspace/wasi-sdk/src/llvm-project/llvm/lib/Support/Signals.cpp:106:18
 #2 0x000055cd3e561e2c (anonymous namespace)::CrashRecoveryContextImpl::HandleCrash(int, unsigned long) /workspace/wasi-sdk/src/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:73:5
 #3 0x000055cd3e561e2c CrashRecoverySignalHandler(int) /workspace/wasi-sdk/src/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:390:51
 #4 0x00007fc6b1e12520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #5 0x000055cd40b658a7 clang::TagType::getDecl() const /workspace/wasi-sdk/src/llvm-project/clang/lib/AST/Type.cpp:3768:32
 #6 0x000055cd3ed2d5b7 clang::RecordDecl::fields() const /workspace/wasi-sdk/src/llvm-project/clang/include/clang/AST/Decl.h:4293:51
 #7 0x000055cd3ed2d5b7 WebAssemblyABIInfo::classifyArgumentType(clang::QualType) const /workspace/wasi-sdk/src/llvm-project/clang/lib/CodeGen/Targets/WebAssembly.cpp:120:41
 #8 0x000055cd3ed2d9fe WebAssemblyABIInfo::computeInfo(clang::CodeGen::CGFunctionInfo&) const /workspace/wasi-sdk/src/llvm-project/clang/lib/CodeGen/Targets/WebAssembly.cpp:41:16
 #9 0x000055cd3ea057af clang::CodeGen::ABIArgInfo::isDirect() const /workspace/wasi-sdk/src/llvm-project/clang/include/clang/CodeGen/CGFunctionInfo.h:296:34
#10 0x000055cd3ea057af clang::CodeGen::ABIArgInfo::canHaveCoerceToType() const /workspace/wasi-sdk/src/llvm-project/clang/include/clang/CodeGen/CGFunctionInfo.h:306:12
#11 0x000055cd3ea057af clang::CodeGen::CodeGenTypes::arrangeLLVMFunctionInfo(clang::CanQual<clang::Type>, clang::CodeGen::FnInfoOpts, llvm::ArrayRef<clang::CanQual<clang::Type>>, clang::FunctionType::ExtInfo, llvm::ArrayRef<clang::FunctionType::ExtParameterInfo>, clang::CodeGen::RequiredArgs) /workspace/wasi-sdk/src/llvm-project/clang/lib/CodeGen/CGCall.cpp:806:15
#12 0x000055cd3ea05bfe arrangeLLVMFunctionInfo(clang::CodeGen::CodeGenTypes&, bool, llvm::SmallVectorImpl<clang::CanQual<clang::Type>>&, clang::CanQual<clang::FunctionProtoType>) /workspace/wasi-sdk/src/llvm-project/clang/lib/CodeGen/CGCall.cpp:195:14
#13 0x000055cd3ea06fad clang::CodeGen::CodeGenTypes::arrangeFreeFunctionType(clang::CanQual<clang::FunctionProtoType>) /workspace/wasi-sdk/src/llvm-project/clang/lib/CodeGen/CGCall.cpp:204:10
#14 0x000055cd3ea06fad clang::CodeGen::CodeGenTypes::arrangeFunctionDeclaration(clang::FunctionDecl const*) /workspace/wasi-sdk/src/llvm-project/clang/lib/CodeGen/CGCall.cpp:471:10
#15 0x000055cd3ec6875b clang::CodeGen::CodeGenModule::EmitGlobalFunctionDefinition(clang::GlobalDecl, llvm::GlobalValue*) /workspace/wasi-sdk/src/llvm-project/clang/lib/CodeGen/CodeGenModule.cpp:5658:41
#16 0x000055cd3ec62805 clang::CodeGen::CodeGenModule::EmitGlobalDefinition(clang::GlobalDecl, llvm::GlobalValue*) /workspace/wasi-sdk/src/llvm-project/clang/lib/CodeGen/CodeGenModule.cpp:0:12
#17 0x000055cd3ec6617d clang::CodeGen::CodeGenModule::EmitGlobal(clang::GlobalDecl) /workspace/wasi-sdk/src/llvm-project/clang/lib/CodeGen/CodeGenModule.cpp:3691:5
#18 0x000055cd3ec617f1 clang::CodeGen::CodeGenModule::EmitTopLevelDecl(clang::Decl*) /workspace/wasi-sdk/src/llvm-project/clang/lib/CodeGen/CodeGenModule.cpp:6590:5
#19 0x000055cd3ecf0b6c (anonymous namespace)::CodeGeneratorImpl::HandleTopLevelDecl(clang::DeclGroupRef) /workspace/wasi-sdk/src/llvm-project/clang/lib/CodeGen/ModuleBuilder.cpp:189:73
#20 0x000055cd3ec4052d clang::BackendConsumer::HandleTopLevelDecl(clang::DeclGroupRef) /workspace/wasi-sdk/src/llvm-project/clang/lib/CodeGen/CodeGenAction.cpp:237:11
#21 0x000055cd3fd67dda clang::ParseAST(clang::Sema&, bool, bool) /workspace/wasi-sdk/src/llvm-project/clang/lib/Parse/ParseAST.cpp:167:11
#22 0x000055cd3ef7b017 clang::FrontendAction::Execute() /workspace/wasi-sdk/src/llvm-project/clang/lib/Frontend/FrontendAction.cpp:1074:10
#23 0x000055cd3eefe964 llvm::Error::getPtr() const /workspace/wasi-sdk/src/llvm-project/llvm/include/llvm/Support/Error.h:279:12
#24 0x000055cd3eefe964 llvm::Error::operator bool() /workspace/wasi-sdk/src/llvm-project/llvm/include/llvm/Support/Error.h:239:16
#25 0x000055cd3eefe964 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /workspace/wasi-sdk/src/llvm-project/clang/lib/Frontend/CompilerInstance.cpp:1045:23
#26 0x000055cd3eff1080 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /workspace/wasi-sdk/src/llvm-project/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:272:25
#27 0x000055cd3d7587ea cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /workspace/wasi-sdk/src/llvm-project/clang/tools/driver/cc1_main.cpp:294:15
#28 0x000055cd3d755b56 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) /workspace/wasi-sdk/src/llvm-project/clang/tools/driver/driver.cpp:366:12
#29 0x000055cd3ed74469 clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::$_0::operator()() const /workspace/wasi-sdk/src/llvm-project/clang/lib/Driver/Job.cpp:440:30
#30 0x000055cd3ed74469 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::$_0>(long) /workspace/wasi-sdk/src/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:45:12
#31 0x000055cd3e561c65 llvm::function_ref<void ()>::operator()() const /workspace/wasi-sdk/src/llvm-project/llvm/include/llvm/ADT/STLFunctionalExtras.h:0:12
#32 0x000055cd3e561c65 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) /workspace/wasi-sdk/src/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:426:3
#33 0x000055cd3ed73e26 clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const /workspace/wasi-sdk/src/llvm-project/clang/lib/Driver/Job.cpp:440:7
#34 0x000055cd3ed3f327 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const /workspace/wasi-sdk/src/llvm-project/clang/lib/Driver/Compilation.cpp:0:15
#35 0x000055cd3ed3f57e clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const /workspace/wasi-sdk/src/llvm-project/clang/lib/Driver/Compilation.cpp:253:13
#36 0x000055cd3ed59c1c llvm::SmallVectorBase<unsigned int>::empty() const /workspace/wasi-sdk/src/llvm-project/llvm/include/llvm/ADT/SmallVector.h:94:46
#37 0x000055cd3ed59c1c clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) /workspace/wasi-sdk/src/llvm-project/clang/lib/Driver/Driver.cpp:1884:23
#38 0x000055cd3d755581 clang_main(int, char**, llvm::ToolContext const&) /workspace/wasi-sdk/src/llvm-project/clang/tools/driver/driver.cpp:542:21
#39 0x000055cd3d762b61 main /workspace/wasi-sdk/build/llvm/tools/clang/tools/driver/clang-driver.cpp:15:3
#40 0x00007fc6b1df9d90 __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#41 0x00007fc6b1df9e40 call_init ./csu/../csu/libc-start.c:128:20
#42 0x00007fc6b1df9e40 __libc_start_main ./csu/../csu/libc-start.c:379:5
#43 0x000055cd3d752765 _start (/workspace/wasi-sdk/build/install/opt/wasi-sdk/bin/clang+0x11a3765)
clang: error: clang frontend command failed with exit code 139 (use -v to see invocation)
clang version 18.0.0 (git@gitlab.haskell.org:ghc/llvm-project.git cadb2a4dec286dc68eda5a143d025701406f5918)
Target: wasm32-unknown-wasi
Thread model: posix
InstalledDir: /workspace/wasi-sdk/build/install/opt/wasi-sdk/bin
clang: note: diagnostic msg: 
********************
```

The LLVM version above is based on latest `master`. The same crash is also present with `clang-17` installed by the official apt repo on Ubuntu 22.04.
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzkWltv27jy_zTKC2FDoq5-yIPj1N0WXfz7b7O75y2gpJHNE4r0Iak0-fYHJCVLVOzekmYPsEUR60IN5zcznAs5RCm64wCXQXoVpNcXpNN7IS9vQEoh35Pq7qIU9ePl75TTljAk4SBFEK-D8DoIh79Z6P5X7r5hgmhUSSCsCXAR4BUK8ivkXiKEkATdSY7CIB6eBvn1jNZ0gr_2wFEl2gNlUKMvVO-RmY0RvkOLhSZyBzqIr78Q1cYYLdq2Y5reE9YBWlSIqLpZVmgh3JUwxPEGUT2QVKihHJbIThNk4eJfPWlHeUFKioZn8HAASVvgmrBFex9kIaIKkbqGGmmB9B4M1ZbwGjHKwUw0sGrGVpKoPSiHwQxuBGPiCzWUjcDPSdbdftakukN11x6O48Ilsv8-SrGTpEVE7jrDnQriNQrw9ouQd-pAKjDXRNGFqu8CvC07yuoAbylXmjAW4K046NkQygO87SXhifT7xXNS_JbvqOc7iDcgmiB-gw5EKpCIaAS8RqJBDWXgBuN-sCMVxOsoiNe5Qfjhw5-_o3ef0A44SKKp4ObLGipG-tsA54Ml5o5afJba254K36FK1EY58hu0UIDjEIUPYRiGaVrVMaSQZGWBGLtvjZLitXpU7uKjpFxbFd5Iq5BiHCTJl1uhtATSBjiz5sm1XThnVahkFeCtIbE4SPFvqHR_a35oGeDt5-5wENI8_oPTB_OA7jhhakm5gZ3j2ICPRyTRDAkuSHgKyaeOO1K_EV4zkGpY5S_C7MBldTBmHoWZ-VuMXGKfyywCXKEAF4QL_tiKTiFOWuiZWDmON2bdfYJK3IN83Aiu4UG_aw_MvXUw7JgAF1byG9Rx6xhrxATfvRy6U5z0UHOjj3QEGp8C6n3vaWFg_RU4jVehYTUaeU16XvOmysoIIpziEFmz6Ok-FNltliwY5d3DYsc796JaKrHMAnwVPiTmE6OwI810gj8JyywtSI6cK7VquyG7m8cDuJsd6GuoWG-JleBK_6gcHOmB4fXnmwBvzQQD6DwrzA8eOcw8DdW4TkuPQyM9WVu-7H1DgdXqJXikvGJdDZMnjl8z13IfxOsEr-KZjvJT3P4F5VopaEv2uL569443wrFaMZMZNI_rPqBYSeNiAu7_O8Lc0xeR90bU8BZMzLmxcUUFeDthbnAH2FheMkFVzFGtGjiPSrSHToN94IEZZnc3b7cdr4zLdwOzV4WYmHgUZSPClYeQhGlOGnSO9_XVu7XcjYipuqbSMvMrjG5E5MvMmiBeGdcdJ30ug-MofA6SivDfyD1sBMgKbkRvkK8NKnbxCI-goh8B1d8Y5vtgSqQkfAcmk_GtzjNPws1yC-LN1P9Z5_fGBKtz020trf87GFPbTEL5Wkry-Akan-BXZ3ky0cDt6IPfPGjH-renOvnxRyJJCxqkU_pXkX2C_3RUQr2WO_UTMe_cwty83RDG-pVYOF2no67xXNdlA-j7NHjWCly-VwrBfMF9bgljf0KlhXSpyg-pKpsL79QHA7sfpdDiaE6_RpjRKjV_J94gngkza0j94wtnKwE8a_r2wnlN2DhMbBY7wk5eBnaP4XqsT3zk0wHOQwZ4_atQJnk0Q5l6KKusyNPyWyh_F3XHBnfQUv2WiZKwEUhDOX0K1I1yyd90_bjnf5qa9YWRT7ntBZBmaTFJTIwEspkEcBGmPyeB_2nk4Swc5jPYWZR_07xPwz4P9pcCirNVNBZiBlIxgxTlTfSjkG7E4QPcQw9gCsw9-dVqylJXs42o_LSyasIy-3Yd7SiDJMeoNBbQX4f4VoruYPKAl8PpAF51lNUghzBTrFwpPeDEftJZJWGKPYO8ItUd8HojuOpakH8rov5qbR3eEEHi3OAaPQv2Ms6mzvK6JlNEH4lUYOvBKcufoSWzZMP9PpN7O9vwu_58Mygim7PtJ09NXoaRVy1vpeAaeO3QD1khVJ2Gn9tg8vkcyE8uPTlHYT4L1djPUKCBVZZM_OybYcvWbj981PI59Ui_CzOWI_2DcUPGTucqq3zle12cfDen4uBWb6_8Z2zcfR-r8WpSzhpW01Oset7U7srLd1xpwivwDKG3DT_T8e3GlesvZSpzbo7GkqQW3YjLj_dNE4VFOMXVIxgJ3ovqRN72BP4LhIYBz41V-fYsJ4PHybH5O8YK7AX1Ok-LHAiqqui2JZR7O9nTcm9P5Jh59uWc9wxv0L2g9fMgaiGYCvC2lvQepHnR8zWgWSV-FYeLGZq0TDM0CGUTOSkVX63EnkDL_BTM0Oj3TIdxzzHLJxjdxTFjme1JYD-213mSZKupLfZ0nMFtoo07spq73JNaVboeHIkxGVtbTUSlJeU7O3LYMjh-cHtbPTxEkbspiaLVrbLDe4F6g82DWy0J1Wp4PSNHGDNma_za8b0Zsh4j2_rojd0nAU5uQ98NOg_4ctvG14OG3otyKI6S0G4cHdUzOzLq1WNWwsSCmr7suZVW7PZtz6wB6nbEGCtJdXfbcL_A_Wer943B9qxDmyeRbX19Y-LbzYehGCXszYOWRLm99tRffvODtCyqsvTHVPty5vlzkGZV3dNDNx_RqbOi8ayQNMAePYP7ugRe4wgrwXZzekQYz9ZkDDj7R7vMX-QH81HkftJax41JNM6J3CYr5EllMOjBy6FmH9p2jDEKb74yx3To2quWXlYqEzjTfZQxSYnTuXDSHH5UOO9Fqc5L5r0oP1ClPcl8Lek5mtGBUGNB_UH59wpzujH9OiLF6bTDwQh1dmCbrqqoOo35iigI4s2xC8CAHZwztAf9-At98siF9cU2f03GCmp-kOtQnFHD9eTay_tPlB7nTOoVTeOZhc7RGK6n-XFUFIlfrMVPSoC06Lf0hpJmgGC97Lr3kX9Tgp8mtiAb91L8M-E6z3CZRchw_h1NX72xDVOer6PMi4XHSJR6QTMJvbaPulnVqxDd3jJamkBFpL41OaoVKVoakqoL8HZpLtWjquFgJuQHzfp2kPlH1v7tzvpkByGJ5rNCEiL7DeVUzydyl4b6wlJ3PV-4sIczI1F8iqgH5RSKk8Rjuz0z-vIknlkbzrMUOap9k8yL9OnZPpooInGepcdOmmENHhsMnZmjpt8TOPYrNmRsr4QH2x5ZA4piY9NFpwAt7pEWSAEgOtm7mE6D7kEqKjiKimW4tA1AO6qDJNxRzUi53BN1B4wthTQc7fbzBbHcmWlJXWKS1FDhIqurrICapCRK4jrEaR5GSZg16SoqjlPf9A2ga-Q6QBcdv-PiC18YKfVD9hJIjVpRAzMDD0LRB_fqnRMt1NdUvkjTpC91LjSY35qSHRdK0wq1yr4ZzOMZ_8-3zN7swTVHDhohpbgHRBUqiYIaCY4Y0WBCVxa2RGmQQRYukflOkRZcp6rtbWVKoIMEBVz7vbeLKLf9r4MAUfloe1pF09CKEobIQSMJB2Fm-6PsuO4QxsswWV7Ul3G9ilfkAi6jbFXEOY4LfLG_LEsS1XhV5QmuakJWGdRVEQNkVRTnWVhd0Esc4jgKcR7iMMN4meKyqKAOwxUGiHATJCG0hLKlsStjaBdUqQ4u8zAJ8QUjJTBle50x7tcMDtLrC3lp7bDsdipIQkaVViMFTTWDS2fhxw7ePXDkOmBtw2jffNyvHr8LlpT0opPscq_1wZ7i4m2Atzuq9125rEQ7KWD86GBZNy7Scv_fAAAA__95eC7v">