<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/90698>90698</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            llvm 18 regression: LegalizerInfo.cpp:199: llvm::LegalizeActionStep llvm::LegalizeRuleSet::apply(const llvm::LegalityQuery&) const: Assertion `mutationIsSane(Rule, Query, Mutation) && "legality mutation invalid for match"' failed
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            bug,
            backend:AArch64,
            regression,
            platform:windows
      </td>
    </tr>

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

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

<pre>
    version: release/18.x, commit 78b99c73ee4b96fe9ce0e294d4632326afb2db42

reduced.ll
```llvm
target datalayout = "e-m:w-p:64:64-i32:32-i64:64-i128:128-n32:64-S128"
target triple = "aarch64-unknown-windows-gnu"

define fastcc i16 @"behavior.cast.test.@intFromBool on vector.S.doTheTest"() {
Entry:
 %0 = insertelement <3 x i1> zeroinitializer, i1 false, i32 0
  %1 = call fastcc i16 null(ptr null, <3 x i1> zeroinitializer, <3 x i1> %0)
  ret i16 0
}
```

```console
[nix-shell:~/src/zig/build-llvm18]$ ~/local/llvm18-assert/bin/clang -c reduced.ll -target aarch64-windows-gnu
clang: /home/andy/dev/llvm-project-18/llvm/lib/CodeGen/GlobalISel/LegalizerInfo.cpp:199: llvm::LegalizeActionStep llvm::LegalizeRuleSet::apply(const llvm::LegalityQuery&) const: Assertion `mutationIsSane(Rule, Query, Mutation) && "legality mutation invalid for match"' 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: /home/andy/local/llvm18-assert/bin/clang -c reduced.ll -target aarch64-windows-gnu
1.      Code generation
2. Running pass 'Function Pass Manager' on module 'reduced.ll'.
3. Running pass 'Legalizer' on function '@"behavior.cast.test.@intFromBool on vector.S.doTheTest"'
 #0 0x000000000387f4db llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/home/andy/local/llvm18-assert/bin/clang+0x387f4db)
 #1 0x000000000387c83b llvm::sys::RunSignalHandlers() (/home/andy/local/llvm18-assert/bin/clang+0x387c83b)
 #2 0x00000000037c1508 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x00007f5bd1254a70 __restore_rt (/nix/store/anlf335xlh41yjhm114swi87406mq5pw-glibc-2.38-44/lib/libc.so.6+0x3da70)
 #4 0x00007f5bd12a3ddc __pthread_kill_implementation (/nix/store/anlf335xlh41yjhm114swi87406mq5pw-glibc-2.38-44/lib/libc.so.6+0x8cddc)
 #5 0x00007f5bd12549c6 gsignal (/nix/store/anlf335xlh41yjhm114swi87406mq5pw-glibc-2.38-44/lib/libc.so.6+0x3d9c6)
 #6 0x00007f5bd123d8fa abort (/nix/store/anlf335xlh41yjhm114swi87406mq5pw-glibc-2.38-44/lib/libc.so.6+0x268fa)
 #7 0x00007f5bd123d819 _nl_load_domain.cold (/nix/store/anlf335xlh41yjhm114swi87406mq5pw-glibc-2.38-44/lib/libc.so.6+0x26819)
 #8 0x00007f5bd124d3c6 (/nix/store/anlf335xlh41yjhm114swi87406mq5pw-glibc-2.38-44/lib/libc.so.6+0x363c6)
 #9 0x0000000004690593 llvm::LegalizeRuleSet::apply(llvm::LegalityQuery const&) const (/home/andy/local/llvm18-assert/bin/clang+0x4690593)
#10 0x0000000004692066 llvm::LegalizerInfo::getAction(llvm::LegalityQuery const&) const (/home/andy/local/llvm18-assert/bin/clang+0x4692066)
#11 0x00000000046924e6 llvm::LegalizerInfo::getAction(llvm::MachineInstr const&, llvm::MachineRegisterInfo const&) const (/home/andy/local/llvm18-assert/bin/clang+0x46924e6)
#12 0x000000000468f688 llvm::LegalizerHelper::legalizeInstrStep(llvm::MachineInstr&, llvm::LostDebugLocObserver&) (/home/andy/local/llvm18-assert/bin/clang+0x468f688)
#13 0x000000000464b138 llvm::Legalizer::legalizeMachineFunction(llvm::MachineFunction&, llvm::LegalizerInfo const&, llvm::ArrayRef<llvm::GISelChangeObserver*>, llvm::LostDebugLocObserver&, llvm::MachineIRBuilder&, llvm::GISelKnownBits*) (/home/andy/local/llvm18-assert/bin/clang+0x464b138)
#14 0x000000000464ca37 llvm::Legalizer::runOnMachineFunction(llvm::MachineFunction&) (.part.0) Legalizer.cpp:0:0
#15 0x0000000002c30325 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (.part.0) MachineFunctionPass.cpp:0:0
#16 0x0000000003213619 llvm::FPPassManager::runOnFunction(llvm::Function&) (/home/andy/local/llvm18-assert/bin/clang+0x3213619)
#17 0x0000000003213751 llvm::FPPassManager::runOnModule(llvm::Module&) (/home/andy/local/llvm18-assert/bin/clang+0x3213751)
#18 0x0000000003214057 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/home/andy/local/llvm18-assert/bin/clang+0x3214057)
#19 0x0000000003aedb33 clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::HeaderSearchOptions const&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::StringRef, llvm::Module*, clang::BackendAction, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) (/home/andy/local/llvm18-assert/bin/clang+0x3aedb33)
#20 0x00000000040cd0fa clang::CodeGenAction::ExecuteAction() (/home/andy/local/llvm18-assert/bin/clang+0x40cd0fa)
#21 0x000000000434b2c9 clang::FrontendAction::Execute() (/home/andy/local/llvm18-assert/bin/clang+0x434b2c9)
#22 0x00000000042d0c02 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/home/andy/local/llvm18-assert/bin/clang+0x42d0c02)
#23 0x000000000441906f clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/home/andy/local/llvm18-assert/bin/clang+0x441906f)
#24 0x0000000000b7b6ca cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/home/andy/local/llvm18-assert/bin/clang+0xb7b6ca)
#25 0x0000000000b736a7 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#26 0x000000000410e509 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
#27 0x00000000037c1962 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/home/andy/local/llvm18-assert/bin/clang+0x37c1962)
#28 0x000000000410fbf4 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
#29 0x00000000040d6ae5 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/home/andy/local/llvm18-assert/bin/clang+0x40d6ae5)
#30 0x00000000040d75dd clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/home/andy/local/llvm18-assert/bin/clang+0x40d75dd)
#31 0x00000000040e1bb4 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/home/andy/local/llvm18-assert/bin/clang+0x40e1bb4)
#32 0x0000000000b78d69 clang_main(int, char**, llvm::ToolContext const&) (/home/andy/local/llvm18-assert/bin/clang+0xb78d69)
#33 0x0000000000a6feb3 main (/home/andy/local/llvm18-assert/bin/clang+0xa6feb3)
#34 0x00007f5bd123efce __libc_start_call_main (/nix/store/anlf335xlh41yjhm114swi87406mq5pw-glibc-2.38-44/lib/libc.so.6+0x27fce)
#35 0x00007f5bd123f089 __libc_start_main@GLIBC_2.2.5 (/nix/store/anlf335xlh41yjhm114swi87406mq5pw-glibc-2.38-44/lib/libc.so.6+0x28089)
#36 0x0000000000b72315 _start (/home/andy/local/llvm18-assert/bin/clang+0xb72315)
clang: error: clang frontend command failed with exit code 134 (use -v to see invocation)
clang version 18.1.5 (https://github.com/llvm/llvm-project 78b99c73ee4b96fe9ce0e294d4632326afb2db42)
Target: aarch64-unknown-windows-gnu
Thread model: posix
InstalledDir: /home/andy/local/llvm18-assert/bin
clang: note: diagnostic msg: Error generating preprocessed source(s) - no preprocessable inputs.
```
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzkWltz46qy_jXKC2WXBLo-5MFx4rWyzkzNnGTqvLoQIJk9CLQB5bIezm_fBZJt4Thzy2S_rNSM43Dp_vrrpmmQsDG8lYxdRtlVlF1f4MHulL7Ekmr2qL9e1Io-Xz4wbbiSEVoBzQTDhkVwk5TLpwiuAVFdxy0oyrqqSIEYS-sqb1hFWMxgldI0RxDBHDc1pHUKo_g6ilfjp2Z0IIwuhZha83j8J8RDNzZZrFtmAcUWC_ysBgsidA0iCNmii9DqcdFHaJWn_mPBEYzQCsEFP7QksIzQKoHlQvrOPF3cuzYIA_lW816wvWyMNdnl6WKQX6V6lItHLql6NItWDoeJ4ydlDZcMNNhYQgBPchClcQRhzXb4gSu9JNjYpWXGLqM05tJutOqulBJASfDAiFV6eb-k6suOfWHGOukOXAWi4mrUcCOtfo7QpA9EMIs9TC4N05YJ1jHpSFkj8AR4EqEb8DfTiktuORb8b6adk3gCGiyc39aAIwjiSZyTl3h5BAsxt0MOQkSw7K2evq6_qyTod0AjWO31aGa92ElxVFyfuHzO6qGRKGmUYFNrdiX508LsmBARWv1_BDdGkwhu_uZtBDf1wAVduMhJyii7jmAK3BChCBbut-9YYONoc8O5jOCGCCxbsCDgGIpgMcXEPgrm3vdA_CS3GCK42anOLQYs6XMEN5Q9TKoWvVb_YsQuknJqcb94HcHNWlH2B3Pa_xCqxuL2njmAH1g7UnkrG7UkvQvspKqcHj8drSK02g9aEcuVvLesP9N5Nwh2z-zYiPtePEewdFTaF4Pt8_8OTD9HMHdB58c4hSvPElcSRHncDRa777fmHksWwdLJd_6epq7Bx2mED1wnKnerSEwawF4A4PIBC05BozTosCU7H-8FaDAXjC5Hdj9_uFnd3wAz1C6tYFAPLdCsV9oCq8DO2t44C-AmgpuW291QL4nqZiTP2I_ghhszMBPBDcCSAi6JGCgDdscA0djsQI3JV6sx8Rb1mvVaEWYMo8CoQY_NbiY2RhGOLaNADxIYonlvJ8j3FpOvgA5df1io8RL4n89atRp3AOt2cCvVnI2bdwjSZALgog20TDI9ush3wiW4G6TksgU9NgZEsNgM0scU-OwaPmKJW7eqC5eoOkUHlx1hMcvYsJisRy-FHWJ5EtDshUeweHuCLA65EMUgfor3P6gsmpTWsyA3z2b88llzab2bvoy-Lo-DNH7cKmM1w50P3jXg0o6hXP6KpyJ4FT9NWI4ZMIIoOQFLSnQW7N0g73krsfgTSyqYNvs94W14nLoADwzwFCTJ4hKs3aq4Y0Q9MP0cwIhgORETjFkradmTnTJW7P8fVKBJRdFkNU1gluIiBtutZsYqzbbaTkZJ_uTSuWv0tokGoexJ7NLk-V-7LklS88jLIo3z7t9Z_7hoBa_JAi5RuUjTQ2J1jUujlvloMcVFHNibhmAwopSA7ba3O80w3X7lQmx5149bKp7i9Z3QlYRSEqDLTqmqSA5a4z3wnixVJA9w5CEORMsGA1yr9_QVzMsGByiKFyiSCmyl2AqF6ZaqDnO5JErQdwWVVAGoMgSVUkTyd3RNjk5cU80XbJpXcVahH93_X9n5pz1_tv-_Kc1MoA6oXdaLT1DDOM_PoPZ1z9jUMjsWOP9N3A5WgDs5xZ2yX8L9EZMdl-xWGqtnsNfgxZA71nJjR4nvYGDKQgNhaGDZ5GV5zsA_meiZHhvF1OitcfXnq6a-MPKDMvaa1UP7QZFPtWH6genJvrdZ5oEHlqHQsrRO0FnLQpsm9PtK6Jxlx75T4-bR8IqXV1rj5zvWRGh9bPzDlf_rHZYtO5KyitDND5J3Joxu767cWejMAK_sf9yZ9opb4_S8mXzPbUB-ekI-wah4nXw9yE_yZ5n3oJc91nbptnhwkPmyCnGIsjkiSFCMYPaStr0GVwDPsJ0F9U00Z-Sdx5UHBRhMUJ5UM1ybz27qvhT_aUS_XiuOSAKnFqdQiyz5Aagf_ckh9OfU9FtgFlkSwCxPYKZxNo89t9LJ83QkOAK-7XpxAP1uYB2WAGywnSPMaI0Q2F8uRGh103F7hclXJumnwfaDdcf4Y_c1x61UxnJibmTLJZuW-2zInwxTpu-ZOyR-6l14mCA3zYZOtxLfGfXFnzq_M-gDlu25IUda763msnWpMMxfE9urE4ETCfu9dT7lVlo9GP7A7lizlvaz1UF2fWimpbzhgt0_G8u6KbUaS8eeQfJ_D2zbn8x0p8L-UXPLtvuz4WwSZQ0ehN1SJphl35mIbiadL01aK2mGbkz5b42wMYDmEQbD0ismNG7wGadPxI5B98TIYNmhjnnzDjFqDWCFlRVKa0iqOayNdmfKg8PnuH4HolFhgCgshSCNSQxDorqeC7e7G4slYee5et2E31DmjKAC1GGZkyZVnDdBAhnxHcE_KIJfYn1h3G-oC0YwAdqgLojros4JBoQkW3eWC7LurFAiO3womvdVUdgG1-BBcfobQI-QAszZCWaU4wLsaV0nX5QSAfL7Dgvxf_7aatxUzhhwkgudjOkOJaj5qeYPrxQ0MCgc0iRmWVx5FmZy93duW-2J9L3j6vEJyQ0hWIgak6_bRjqkx4gYdU_RsU7WquuwpKcL8azDDilS-R0AiyA5HhP_ISkeJmy35OkpScY_amw4cQmUO0yexWCwa9hajV0ZO3WfiMPC-d0qPet3Q3zE1N5xq_mlt79ULgTuaoojWBypgqVQLkIq8Jeqz_ujOL1Jq3I4c8W5-7LjVR9u2MkJ_duue-s-McILwrw8iaemblLwT46Hk4r-VceHNzIxzTHLXiXOp1n8Ykvbsxnk5JOJbsBr5dY3hq6m0aN5v-UeYbRxHj3opMqgRUbpz5Lwl6rN6wz8peoP3NjXqskXSffg9B5z529_b_3jpE2R8fupc8wE1IWVUMySun514V3Pvgc7-5kt_TXK_4vUvbVs9FwEZMGTzbik-VQ27kuIPVifHVbT2v7-Vvu2osHBCHAGZVmM84bVCDiEb1I0ygkUnTzQQKwhDGy3gtcuVWJtt26H385Uv8c1edG4knEG6-RJBmrisgpheXel8R8fbq_WW7iEy-wd8ZVxGfonP4kjf0M0IntjKDhJB1WH1wSY1m7XWY2xCprpaODfnHGLZ3z8DR653QH2xF1sUgYSlDo0g2Fg8QCsAoYxwGcl_FwNmF7RAUm5TEY2f-5J-Y-_v7PXO14FOLO-9brMONQ_YAOdoky4Cb0y_Gns8mcOIRi95vqnH42HNEvlTuIrQA_3IqAzvufGOeDwEFy255_zl8blggWQataPa-FY7wdrlicvp1zQS0QrVOELdpkUSZqhtMjKi91lSfKyYpgmtGjKPMlpXtOU5mVZozypsviCX8IYpnEWJzFCVVIuqyLNyjSrK1pVtMhwlMasw1wsndVLpdsL_xrDZRXnVXkhcM2E8W9sQVgPrX8ovnbfx0sFV4CtvEsOPZq1mhn_Ete-qRfYNkr7t6hGh7mu7PpCX_rAqIfWRGksuLHmiMNyK5gfAJISzMSiFfjHv8FyMWhx-etvqHjv_icAAP__TOb_aA">