<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/95471>95471</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            `fp128` causes compilation failures when compiling for `nvptx64-nvidia-cuda`
        </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>
    When compiling the following IR for `nvptx64-nvidia-cuda` ([compiler explorer](https://godbolt.org/z/5To81ed8M)):

```llvm
define fp128 @identity(fp128 %x) {
  ret fp128 %x
}
```

LLVM will crash with the following assertion failure:

```
llc: /root/llvm-project/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp:11476: void llvm::SelectionDAGISel::LowerArguments(const llvm::Function&): Assertion `InVals.size() == Ins.size() && "LowerFormalArguments didn't emit the correct number of values!"' failed.
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-assertions-trunk/bin/llc -o /app/output.s -O3 <source>
1.      Running pass 'Function Pass Manager' on module '<source>'.
2.      Running pass 'NVPTX DAG->DAG Pattern Instruction Selection' on function '@id2'
 #0 0x00000000039ffc08 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x39ffc08)
 #1 0x00000000039fd35c SignalHandler(int) Signals.cpp:0:0
 #2 0x00007616a2e42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #3 0x00007616a2e969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #4 0x00007616a2e42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #5 0x00007616a2e287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #6 0x00007616a2e2871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #7 0x00007616a2e39e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #8 0x00000000036fd90b llvm::SelectionDAGISel::LowerArguments(llvm::Function const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x36fd90b)
 #9 0x00000000037c2335 llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x37c2335)
#10 0x00000000037c2f88 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x37c2f88)
#11 0x00000000037b417f llvm::SelectionDAGISelLegacy::runOnMachineFunction(llvm::MachineFunction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x37b417f)
#12 0x00000000029e2a29 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (.part.0) MachineFunctionPass.cpp:0:0
#13 0x0000000002fbc7d3 llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x2fbc7d3)
#14 0x0000000002fbca11 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x2fbca11)
#15 0x0000000002fbd275 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x2fbd275)
#16 0x000000000083a37c compileModule(char**, llvm::LLVMContext&) llc.cpp:0:0
#17 0x000000000073005e main (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x73005e)
#18 0x00007616a2e29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#19 0x00007616a2e29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#20 0x0000000000830e9e _start (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x830e9e)
Program terminated with signal: SIGSEGV
Compiler returned: 139
```
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzMWN9P6zoS_mvcF6uVY-fnQx8KpSwS7EWXI3bfkONMWi-uHdkOlPvXr5y0JSmcH91FR_coB4iT-eb7xjOTTLhzcq0B5ii5QMlywlu_MXZeAngL4Calqd7m_9qAxsJsG6mkXmO_AVwbpcxrOLv5E9fGYpQS_dL4XRpP9YusJJ-KtuIoJRjRHCUXvTlYDLtGGQsWJUtE8433jUNsgegK0dXaVKVRfmbsGtHVX4iukm8mj6DK7xAtwsEWiCwROfxMSX8o9bLtlyqopQZcNxHNMYqJrEB76d8QzfdrNNkhWmCUXfQWGFvweHCxh86WJz6Gjm9vH-_wq1QKC8vdBr9KvzmJC3cOrJdG45pL1Vr4Hvf-VCmB2AIjurLGeERXQdK0seY_IA6n4ZcsEV1dmgquQSO6egAFInhZLq5PTi9aqSqwM9E0iC2iKM7S4OHFyAp3aGyB2GJocfMAql-9Na9gF3bdbkF7h2gujHZ-YLZqdWeFaNpvC14c9aKU3OhHrtzMyb8gbH8IN1sitsQ3erwazFOMKO08rozdcnX0iytZaUQzj2ErfRdfYawF4bFutyVYbGr8wlULDtEIUYpo1kUbqlkf1fvbq8XDFXZtGQA4Lts1ttAY67E3-CT5pN-05UyY7SDc402QznW-VpjrCkstVFtBz6tLg5KLZ2-5gL37B8_FM67abXPcfDJDpLi3Zm35FvNjhPutN03wciiV6bFU6EoortfTY065qbetfkZ0VUrd8RR4agIEb5oA1Pqm9TOHp38wjNilM60VgNhVTyIKJP5stQ6J2nDnMKLZYUvxfVi445qvg-sMG423pmoVhLtGYDTbC6WfAf7z8f7bv_FycT1F7Gq5uMb33HuwOiSBt23v7Jh_e0_1gUXwFco3bOq-UBFlBJMdOfxjRV0Lkg_S0r25_o97K7Xvwv8t7Aei-ftNlr8-Gect8G2Xf5dYat9nY_5_bgKiF2S3pxXq4sg7OuFdsUTgB7nWXP2D60oF_HxPo192-8Il3f8jEN0DZWmUcgoxTSjZE-97wy5Pn9J4qqRud9O1bvsLYubMLO3odSYjcmyMWaRFLXDjNxZ49fQcutxZDjr7kYP4lHScpXjtOp3nkg9tbIidjLFpntUM8zKU-FnIneEIOf2AHJVnY0blCDMbY7ICivQ8zM5khJmPciutq4KU53f4j70dd02_7_BfVhs9vRH_YsQ_E5Sx5Kf8-9WFUhfcSXGhjHj-jSp6kkcVocDJqYo6z3-qwrb6D33HxUZqeH-kDlR8uPbVMuo8H8kYN6qsjKOs_oGMW1hz8fb3ENNxHYmhQzG0AMppgb_LJzz3Bko-lfCR-6zh1s9CQ8Wf4H1s4oEXG_GqS5FVbPhydR9MD0_gsxl9RTT3pEbRjE9Z8yj6BdZ33bvDOBH2S1_NmEfRiHFywrii2bCzqEHyDrjfbJv38vwdvAOtEe90yJvkjLNM7AcwOIZTbLhFdNEdlwNVYTa5NNrD7tD1lBKf52E28pMxQhLAWy71V4nrIUfa8pOnalEVZ77AdCYjzOIUE2KCn56C2ZPz3Pqngahf9gLxyAslJ7tCoADc439VvHrQo9fDnODBbqXmHqp-0uzfnMLQ8HBz_XB1_djffnmYsS341mqowh0RK04Gzkk1Z1XBCj6BeZRFOYuiPE4nm7mAomCsopzwJIlJWvE6LTllWZ6SKq9hIueU0JikEaMkIXE6I2kcl1lKEhblNIoIiglsuVSzkI5hjJ90I9O8SOIsmihegnLdpwZKNbzi7mKY25LlxM67Yats1w7FREnn3TuKl17BHKWkG9NRSrDgrQO3Lwo-nLMdfh1_r_jh54lJa9X8fx8Ee2Evc_rfAAAA__-AMTr2">