<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/96432>96432</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Compiler crash when targeting `mips64` when returning `fp128` after calling a function returning `{ i8, i128 }`
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

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

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

<pre>
    Attempting to compiler the following IR causes LLVM to crash ([compiler explorer](https://godbolt.org/z/cqKz4Ybxb)):

```llvm
target triple = "mips64el-unknown-linux-gnuabi64"

define fp128 @foo() {
  call { i8, i128 } @bar()
  ret fp128 0xL00000000000000000000000000000000
}

define { i8, i128 } @bar() {
  ret { i8, i128 } zeroinitializer
}
```

Crash backtrace:

```
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.      Program arguments: /opt/compiler-explorer/clang-trunk/bin/llc -o /app/output.s -x86-asm-syntax=intel <source>
1.      Running pass 'Function Pass Manager' on module '<source>'.
2.      Running pass 'MIPS DAG->DAG Pattern Instruction Selection' on function '@foo'
 #0 0x0000000003739428 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-trunk/bin/llc+0x3739428)
 #1 0x0000000003736dac SignalHandler(int) Signals.cpp:0:0
 #2 0x0000718fcb642520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #3 0x00000000034c3bb3 llvm::SelectionDAG::FoldConstantArithmetic(unsigned int, llvm::SDLoc const&, llvm::EVT, llvm::ArrayRef<llvm::SDValue>, llvm::SDNodeFlags) (/opt/compiler-explorer/clang-trunk/bin/llc+0x34c3bb3)
 #4 0x00000000034c79f4 llvm::SelectionDAG::getNode(unsigned int, llvm::SDLoc const&, llvm::EVT, llvm::SDValue, llvm::SDNodeFlags) (/opt/compiler-explorer/clang-trunk/bin/llc+0x34c79f4)
 #5 0x0000000003430a84 getCopyFromParts(llvm::SelectionDAG&, llvm::SDLoc const&, llvm::SDValue const*, unsigned int, llvm::MVT, llvm::EVT, llvm::Value const*, llvm::SDValue, std::optional<unsigned int>, std::optional<llvm::ISD::NodeType>) (.isra.0) SelectionDAGBuilder.cpp:0:0
 #6 0x000000000343fb56 llvm::TargetLowering::LowerCallTo(llvm::TargetLowering::CallLoweringInfo&) const (/opt/compiler-explorer/clang-trunk/bin/llc+0x343fb56)
 #7 0x000000000344172d llvm::SelectionDAGBuilder::lowerInvokable(llvm::TargetLowering::CallLoweringInfo&, llvm::BasicBlock const*) (/opt/compiler-explorer/clang-trunk/bin/llc+0x344172d)
 #8 0x0000000003462354 llvm::SelectionDAGBuilder::LowerCallTo(llvm::CallBase const&, llvm::SDValue, bool, bool, llvm::BasicBlock const*, llvm::TargetLowering::PtrAuthInfo const*) (/opt/compiler-explorer/clang-trunk/bin/llc+0x3462354)
 #9 0x0000000003478998 llvm::SelectionDAGBuilder::visitCall(llvm::CallInst const&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x3478998)
#10 0x000000000348d487 llvm::SelectionDAGBuilder::visit(llvm::Instruction const&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x348d487)
#11 0x0000000003505a53 llvm::SelectionDAGISel::SelectBasicBlock(llvm::ilist_iterator_w_bits<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void, true, llvm::BasicBlock>, false, true>, llvm::ilist_iterator_w_bits<llvm::ilist_detail::node_options<llvm::Instruction, false, false, void, true, llvm::BasicBlock>, false, true>, bool&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x3505a53)
#12 0x0000000003507124 llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x3507124)
#13 0x0000000003508f94 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x3508f94)
#14 0x00000000015c3c1b llvm::MipsDAGToDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x15c3c1b)
#15 0x00000000034f8ac1 llvm::SelectionDAGISelLegacy::runOnMachineFunction(llvm::MachineFunction&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x34f8ac1)
#16 0x000000000283368b llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (.part.0) MachineFunctionPass.cpp:0:0
#17 0x0000000002d72152 llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x2d72152)
#18 0x0000000002d722d1 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x2d722d1)
#19 0x0000000002d73f80 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x2d73f80)
#20 0x0000000000846ed4 compileModule(char**, llvm::LLVMContext&) llc.cpp:0:0
#21 0x000000000073ece6 main (/opt/compiler-explorer/clang-trunk/bin/llc+0x73ece6)
#22 0x0000718fcb629d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#23 0x0000718fcb629e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#24 0x000000000083eb0e _start (/opt/compiler-explorer/clang-trunk/bin/llc+0x83eb0e)
```
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzUmF1v4jwWxz-Ne2OBgvN-wQWFMlttu1tNq5H2CjmJE7w1dtZ2WjqffmU7QJzS6cy0j0bPiCngl-Pf-Z9j52CsFG04IXMQX4J4dYE7vRVyXhCiJSHqohDVy3yhNdm1mvIGagFLsWspIxLqLYG1YEw8m57rr7DEnSIK3tx8u7UDJVZbCFAG4svjJLJvmZBEgngFULbVulUgXAC0BmjdiKoQTE-FbABafwdoXf7vn9-j_xT7AqDcvMIFCFYgOPxNAvdi7GnnmjSWDdFQS9oyAkG4ggChHW1VEhE26fgjF898wijv9pOGd7igSQQQGlqtSE05gXU7QxkEUVALYXxAOQTppRsCYYkZM98hzQBaQmrHpiszvsDSjT-MlUT31oL9TfDOv54kXZ1Beme9IZ9Z88zw70QKyqmmmNHvRI4XO-g5XHtpo1jg8lFLXJK3QuC-3t1cLe6voOqKHdUQw6JroCStkNokxCjaVG-7YlqKHUBrG0H3Nmml-C8pNUBrqlRHFEBriHkFKS9ZVxGbd6VPNXXL32tcPsKq27VHzGAKgvxOikbiHcSy6XaEawMBAVqL1qxyyM3JMTfRumSYNxMtO_4I0Lqg3MKVcCLMPNy2Znan205PFZzss2SC1W6iXrjGexCuKNeEQRAuleikEe3K0cwMzdeOc7NjWqwUBChdd7zUVHB4ZxpuMceNYUih4HAnqs4kMko9YyjtPUbnDN5e393D1eLLBIRXq8UXeIe1JpLDa6607Nxa94QR-6lfqD5AmKX6pE_7bAIoDGCwP-ZomIZ5hDJogxYuQLhQL8p9uJOUaxuGB5stKDsNkvh5I5SWBO8ASmxecm3z1qTvrwcDoMtg37OcthtA4WwEm1S4hPe04Zj9A_OKGaNZv7ZrVtOyNTkT2P9HQ6g3lM6yuiySCMUo6GkZLQBa77Nkk0Sn88R1lFMlponFs1M8uNCDi8qwKMKBkse4rBZfXMtasGopuNKY64WkersjmpYAZR23Z3flZFwOjaxuRAlLM6lX-tR39e3Bb1hIiV--khqEy6GFb5h1Ltd8y_8SFVkz3KgPR8757okTjcRJ8zr6oTgN0Qbo89Q4OP4Xem2c8ryOfa_DAGcRbIheivZlLcXuDkutvK3kCTH26Uf-9u4dehem923lbsfqvJLrtbWzUipduTbRGmrMQLj0lnV5dm7Yyd71_cp9MMF4eGlddtpwTKmSeBrYDT2Q5rKjrCLy_OZORqrXRZwM6B9sJXEjnomkvHFt9tsSM_YgvHCcG2uGHVqueS1sKHIn1QczyKJ6GZT6vkSzFFVv7JteE9fBDOA1fxKPuGDk93wahvwSK1peMlE-DnLioxvGeuO5m_nuJiiM3zomPHffip9pusSK_HjTmMZCCDZ8f8f15TsJdaflotNbo-UnCmb18ATLfcHSLM-znxHsiSqqjTqv5DK1xECujyJboiOyeYb7FUeUVVGW_jSyhzssez6P2AJ5xH7ZEQcxjt96sl_fEzZsPSWPR04ZVXpDNZFYC7l53hTU1K7L8YiKaEx7g1xUZOPOT3_oQAaTmDVmingfngStzLuW4-ffAM8d1Mc5duy4SPhbYbud_PGEcPH2EgKNEiKdobeOqXFCLOyB1NP7z_7jz4VPy2VH5qGHI_Sszt9Hlx3_N7_F5ZZycqD00F_1fQa7QfPYvSJyFpdhOSuGRQ1t1Wrx5UH8afYezWMflYJ1hsvZD3S_IQ0uX_6c-g7Q88Arq1AWhknmqe9DmJ-8A_yz3K-Bpy2W2pV7Z-y9LvcMl1cioSpFsxgNuNZ3Zurhx_cvE_22hD2JJ2E2RkXV7CdQb-1dgR_yvulTMFHlRzofYYZ1Fgww2SA3B8DXu_a05f4yWMMyhEVeORFkUUKq6HCVeRSu3GJpK7BR6XZz8-12Kbgm-8N5y1h5Ns2QVwQEaUhKksAdpvxDHjk7nkOjuwmUV_kv3k3YKZ7NcGyTRAHcbMy0jdJY6s3Ak59ehUT-KpEfipAUAYHO_odEcpZOSx2uJi-qeVjlYY4vyHyWzvJZnERperGd5zgM6yipSZDMgjDBySzLizIvkpKgOEjyCzpHAYqCxBzMKI3TaY3TuqjrahbFeRwWKYgCssOUTU2uTIVsLuyV5TxPohBdMFwQpuzVOkKcPEPbCRAC8epCzu1lZ9E1CkSBqYfUyYqmmpH58nBp7m47n7eEQ3fBTXkDQRK4i22QBK5PEt1J3vfZG2fThWttTGDGTA8-3fR5w19fFhvlOsnmv39r61R4mqP_BwAA__-8wVpo">