<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/122120>122120</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [clang] Assertion `Initializer && "Initializer must be non-null"' failed
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          wxie7
      </td>
    </tr>
</table>

<pre>
    code:
```c
void *f() {
  int sp_r1 __asm__("ebx")((char *)sp_r1, 0);
}
```
just crash on assertion trunk
https://godbolt.org/z/YTcbYxd87
generated via fuzzing.
No related issues were found by searching [issue](https://github.com/llvm/llvm-project/issues?q=sort%3Aupdated-desc%20is%3Aissue%20is%3Aopen%20assertion%20Initializer%20must%20be%20non-null)

<details><summary><strong>Backtrace</strong></summary>
<p>

```
clang: /root/llvm-project/clang/lib/Sema/SemaInit.cpp:6593: void clang::InitializationSequence::InitializeFrom(clang::Sema&, const clang::InitializedEntity&, const clang::InitializationKind&, clang::MultiExprArg, bool, bool): Assertion `Initializer && "Initializer must be non-null"' 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: /opt/compiler-explorer/clang-assertions-trunk/bin/clang -gdwarf-4 -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 -std=c2x -c <source>
1.      <source>:2:45: current parser token ';'
2.      <source>:1:11: parsing function body 'f'
3.      <source>:1:11: in compound statement ('{}')
 #0 0x0000000003c8d758 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3c8d758)
 #1 0x0000000003c8b464 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3c8b464)
 #2 0x0000000003bd89a8 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x0000775878642520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007758786969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #5 0x0000775878642476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #6 0x00007758786287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #7 0x000077587862871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #8 0x0000775878639e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #9 0x0000000006d0bff4 clang::InitializationSequence::InitializeFrom(clang::Sema&, clang::InitializedEntity const&, clang::InitializationKind const&, llvm::MutableArrayRef<clang::Expr*>, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x6d0bff4)
#10 0x00000000069cf647 clang::Sema::AddInitializerToDecl(clang::Decl*, clang::Expr*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x69cf647)
#11 0x0000000006664529 clang::Parser::ParseDeclarationAfterDeclaratorAndAttributes(clang::Declarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x6664529)
#12 0x0000000006673699 clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::Parser::ParsedTemplateInfo&, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x6673699)
#13 0x000000000667bfb7 clang::Parser::ParseSimpleDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::ParsedAttributes&, clang::ParsedAttributes&, bool, clang::Parser::ForRangeInit*, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x667bfb7)
#14 0x000000000667c479 clang::Parser::ParseDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::ParsedAttributes&, clang::ParsedAttributes&, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x667c479)
#15 0x0000000006729e02 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x6729e02)
#16 0x000000000672ab30 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x672ab30)
#17 0x000000000672b9f5 clang::Parser::ParseCompoundStatementBody(bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x672b9f5)
#18 0x000000000672d1fa clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x672d1fa)
#19 0x000000000663f4c3 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x663f4c3)
#20 0x000000000667407d clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::Parser::ParsedTemplateInfo&, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x667407d)
#21 0x000000000663322e clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x663322e)
#22 0x00000000066339e9 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x66339e9)
#23 0x000000000663b193 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x663b193)
#24 0x000000000663c06d clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x663c06d)
#25 0x000000000663c510 clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x663c510)
#26 0x000000000662e493 clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x662e493)
#27 0x000000000461f2b8 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x461f2b8)
#28 0x00000000048dbab9 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x48dbab9)
#29 0x000000000485e18e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x485e18e)
#30 0x00000000049c906e clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x49c906e)
#31 0x0000000000ceda5f cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0xceda5f)
#32 0x0000000000ce54fa ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#33 0x0000000004664e49 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
#34 0x0000000003bd8e54 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3bd8e54)
#35 0x000000000466543f 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
#36 0x000000000462902d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x462902d)
#37 0x000000000462a0ae clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x462a0ae)
#38 0x0000000004631bd5 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x4631bd5)
#39 0x0000000000cea8a3 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0xcea8a3)
#40 0x0000000000bb6b84 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0xbb6b84)
#41 0x0000775878629d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#42 0x0000775878629e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#43 0x0000000000ce4fa5 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0xce4fa5)
clang: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134

```

</p>
</details>
</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJzsWtty2zjSfhr4BkUVCZ4vfMHI1vyZP7NJRa6tmisVCIISJhTAAUBHztNvAaTEgyXZnqVTs7U7NY54QDe-_tDobgLASrEtp_QWhB9AeHeDG70T8vb7gdH4JhfF0y0RBQV-BtwMRG77PwFu9ihYAQHKSoASgFII4g_AzSBkXENVb6QHNxus9puNfY9ofgAIAZTa24TssDTSAKW2MUBL6Jq3vtEC4rthd8DN_miUhkRitYOCQ6wUlZoJDrVs-DfgZjuta2VQohVAq60oclHphZBbgFY_AFr9_kDy3w9FEgM321JOJda0gI8Mw7L58YPx7QK42T8ElLSyb5hSDVXwO5UUlqLhBcyfoKJYkh3jWwjCD7YFCO8ASiadM71r8gURe4BWVfV4_HFqKf6gRAO0arUDf_Un8O-UkBqg0M-aujB9OwVVBKAQuUzZ521Pgweiptzen3iwdx850wxX7AeV9n7fKG0v8laaC-7wpqoMza4dT39ZUI1ZpYB_D_ylavZ7LJ-6Gy0F3wL__gMm37TEhAJ_CdDq9Ly77WWswrq7Gg8fqbCRySBAKymEfk5J2wKtKpYDtFrTPe5-jFULUtfAz6Iw9Y0S63pHlcDPToZjw8Wa_tlQTujkHV1JMyLJQK7tJTK-RwQ3DnZGJy3uuWb66cWGtvP_Z7w4tuzb_NZUmt0fapkZh1zCXIiq_02NTdnJpUE0HElotUUQIDR8asYW5hT2Y4oAimGJWUUL48tfPt1n63uomnzPNMQwb7ZQ0lpIDbWAf9Vj0QpiXkDGSdUUFOod7SZlfnIStIS1pLUUhCpFC6hEI9vHRhIrJQizU0w2HCoiWa0N3rXG5Bssmn3dxhp3Adz0ixRbifcQy22zp1yrzoVEbV1G7GtWUenQQ10Jaby-dSPnNC-U0wYItMoZP76Gzrb4jmXpBNDZQkcYjbiujd5G141eKOjsjf3QcQ5J5GC1d9QT1_gA_DvGNa2gU3LhPFKZC0XNe-isoeNsCXG0EBXZYcaBf3cVqWmsOK7VTmjolERUQjoFw1sulGZEtX1YdsePD5BAR-kC-HcEHaBDoJmtLct27nmGutEzP0PAz4LQ0EcaKSnXsMZSUQm1-EY5BCg2kReZ8IjOiHvmz_xjxUwELBtOrLuaHGHky1bavyrNODRc2ICqNNbUjCq0KSE2CSS-Mxc2PkGAfBe6B_f4n0-SIg4TaB3UTiv1pNqLL5JxbT3oofXBpG8k8feNUFpSvO8mJuPaJizT67_pSgB9cA8dsB62N4GdB1FwDvayopg39We-ZluOK4CShttsXMDKxNiZQRoYPUg0ApkXSYoTuDTu9pUS8UjlU4vq_zAvKtNX0vE2arMUXNPDMUC79q_V73f64zhM4iQKTAbqzGlj_CGJNlHgVIw3B2fLm_YFWSixiCxkK9IDDsYK0ygtCaz1TlJcbL6xqnqbdivfaw-ncIM4gltlKXgr7CCOesXRWDFK4tKHODeB-E1qrWCvNn6m1svfrNDLe4XJWKGf0jR6m0Ir0itMhw4WFW5elsHcWftKvm4z9ZWGp3w9atlP098ajfOKZlLip6-0BP5yoMUkc1O--vdn8vl8s7ajravYkO-NImKUkjIKYjglx15lRTEoGB7EHSXVmMj2STbh52jZu5jTAu7NGUXKKIqCEKVDMF9skhpcG8xY2qHLSk3l8V7IjBeZ1pLljTaFytTQttFzd3jWQ_FA97X5CPjIS3HJiYZSKyG_Yr6lhu32i2ZGwlpKesLQmLDYj9KXCftFiqYeU_KlTePm7bqm5LmFPWddiD_HwIjxtzH7vP3aVgyfBMHtF83UMX8e55bVnnN_wnle5vFVQ9dsX1dDV73kjuepnRJxltiXqX_e4himXkvqS8MzL-mG1p70YEI6CeJXR4a_Cd0_kzxDT09eOCIvRil10XWPPdbin-U0wo6Cap8d13tcVf-kxATVUWZc6_3Re3zU2AT5cmQwQq8bnbNR4e2jMyf7Lb89-9GEfZz77l9g_-9C97xUGTJ6quIJVXlahlehL7uvxxNlH0TxBFAyf6nSgumhJhOohVfiq1BX3RfyFOqLFdhz_yCipu_gtsaE3sBxvR75ZUD8Vxl4R0tmKs1p4B3UGO9XfX3CmvYz_BNT71APWCpORCF3kpoCNy7-V4PNndEMqz3nkw8F30eIvsj5Zzlw0Y9cU9mussyc3F8cx4wQqpR5x0pmiJjXOw0XPVNoylRKX104jQi7OKdn52vqZe_NV0r7WglNqns_99LrYe_-0DrSxYLzvTialwVjZ8_CpNz2iRtdj2kPov5EH2n1fFnhc43_bOgXPSlUTkHQrqWcKVP6pYvfRNFU9OO-FlLb7Dl77msN7M0Pp-aH3vWSbcWk0v_xHIReX4uhcdkaIRqcmQjZ-uHiatz7rYK1YHqoo7IxiLwS5ckQ6lIU9BfKMxvKjstalDSado-6Leu5AHYQeoCjYjFIihznoyC8kiah8-IMwtmxtb332NIxtpB6CR2T1_b2kSuNTyuyU_4uGzOzn3YIT_jHm0JBSlI3ouMFTIu0N-PxVM4k18ycOcR2yHrcoxLGJbTAYQkJ8TZ7zMYfe8Ml5x2WxzL4uNo8foaWdj98bvgtvh49mqAPgxLDI9VL78HO-fMfrB_3dXXWlMmCu9HRFbqDyj-FhWSPVE62mAwmfxwGooAGaXs4oFd63KfcSMtnd2rFTlW7Nwn8jOCqyjH5tin5OFy3HXfusvSWYr_HvJjO1rPjZvdnzTNRm96xIWBAjpaMb7sk0A7qSWCzIYeD3S0FfpZjxchG2eYdhaPG5sFGS8y0Or6eqMNVZdy_XTbo3psmgwV-6zgt4VYEoLjC-7zAdi_2SBVKjnuSv4r8zGAE0_1EGg43Pc_tGrZvvjZ8jUtaPY24vD5us-6Mtlh7Vw8nbhUGfgn_m93CcL2osdQL9_L4R2PWUOqi4iJrdrzws9x3pHIUqCeCpsGlhYErTbNRkTIwbK4KwBrcO9GkREHYxfStdPwqcnWZi19F_okpfWH38nn8PY19jZkZdrud_3r6Ogd5ZxINTT2J4zIq8r28CC8Bvhtcj0qAM7n_Evk_kcRZq09LTE9bOsnVOMFdJX-sNY6wbeDIumn_ciaesbowmE6Ig1FN5-Z5lCcBNFjn67JV2nfpTQ5QpEX6xvMpVqRXiKYKaeDCzcbIbJTGUm8GBr26CxoMuvAnAxuUOISt8jnHxqhtOz36NaRSmlyRtW4Ey67kh6Tz8PbgIfzO9A7SAzNuU1Do-YHB1SgKnUeoBVSUQjYoyE0fx0IcSqobyamZYEby-SnS9oQpQKv6dNwUoFV_hPWmuPWL1E_xDb31Yj_ygzjxwpvdbRykURLEpeuGBQ1R4sakoCFOUlKUpY_yG3aLXBS6npt4Qeh6wSKO8ijxkihMgpwmUQQCl-4xqxZmkiyE3N7YE5G3HkIecm8qnNNKHc9Qy1t7ejJvtgoEbsWUVr2cZrqyp61bbsO7WY9-3jSyuv3rpzs7cx5v0b8CAAD__8MhTow">