<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/60324>60324</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            LLVM ERROR: cannot select f32 fcanonicalize on x86
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          CAD97
      </td>
    </tr>
</table>

<pre>
    This is quite possibly just a misuse of the intrinsic, but the error said to report it, so here's the report. [[godbolt]](https://llvm.godbolt.org/z/f3vcTshWr)

Input LLVM IR:

```llvm
declare float
@llvm.canonicalize.f32(float %a)

define float
@tgt(float noundef) strictfp {
   %r = call float @llvm.canonicalize.f32(float %0) strictfp
   ret float %r
}
```

Error:

```text
LLVM ERROR: Cannot select: 0x564e1ca99d30: f32 = fcanonicalize 0x564e1ca99cc0
  0x564e1ca99cc0: f32,ch = CopyFromReg 0x564e1ca196a0, Register:f32 %0
    0x564e1ca99c50: f32 = Register %0
In function: tgt
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 'X86 DAG->DAG Instruction Selection' on function '@tgt'
 #0 0x0000564e19023a3f llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-trunk/bin/llc+0x3352a3f)
 #1 0x0000564e190214b4 SignalHandler(int) Signals.cpp:0:0
 #2 0x00007f04170a6420 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x14420)
 #3 0x00007f0416b7300b raise (/lib/x86_64-linux-gnu/libc.so.6+0x4300b)
 #4 0x00007f0416b52859 abort (/lib/x86_64-linux-gnu/libc.so.6+0x22859)
 #5 0x0000564e165f1a4a llvm::UniqueStringSaver::save(llvm::StringRef) (.cold) StringSaver.cpp:0:0
 #6 0x0000564e18e04f80 llvm::SelectionDAGISel::CannotYetSelect(llvm::SDNode*) (/opt/compiler-explorer/clang-trunk/bin/llc+0x3133f80)
 #7 0x0000564e18e0a2c2 llvm::SelectionDAGISel::SelectCodeCommon(llvm::SDNode*, unsigned char const*, unsigned int) (/opt/compiler-explorer/clang-trunk/bin/llc+0x31392c2)
 #8 0x0000564e1789f382 (anonymous namespace)::X86DAGToDAGISel::Select(llvm::SDNode*) X86ISelDAGToDAG.cpp:0:0
 #9 0x0000564e18e02dc7 llvm::SelectionDAGISel::DoInstructionSelection() (/opt/compiler-explorer/clang-trunk/bin/llc+0x3131dc7)
#10 0x0000564e18e0ea79 llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/opt/compiler-explorer/clang-trunk/bin/llc+0x313da79)
#11 0x0000564e18e117ff llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x31407ff)
#12 0x0000564e18e13eef llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (.part.0) SelectionDAGISel.cpp:0:0
#13 0x0000564e178a91b5 (anonymous namespace)::X86DAGToDAGISel::runOnMachineFunction(llvm::MachineFunction&) X86ISelDAGToDAG.cpp:0:0
#14 0x0000564e182ac6a0 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (.part.0) MachineFunctionPass.cpp:0:0
#15 0x0000564e1879b520 llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x2aca520)
#16 0x0000564e1879b699 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x2aca699)
#17 0x0000564e1879c280 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/compiler-explorer/clang-trunk/bin/llc+0x2acb280)
#18 0x0000564e166c2553 compileModule(char**, llvm::LLVMContext&) llc.cpp:0:0
#19 0x0000564e165fe05a main (/opt/compiler-explorer/clang-trunk/bin/llc+0x92d05a)
#20 0x00007f0416b54083 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x24083)
#21 0x0000564e166ba1ae _start (/opt/compiler-explorer/clang-trunk/bin/llc+0x9e91ae)
Compiler returned: 139
```
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJy0mFtz4ygWxz8NeaHsQqDrgx8cO86mqnsnlfTu9j65EEIy0wg0gHqd-fRbINmRPJ5NNt1T5VwKDn9-nHO4HFNrRaM4X4HkFiTbG9q7gzarzXpbZDelrl5WXw7CQmHhb71wHHbaWlHKF_hrbx2ksBW2txzqGroDh0I5I5QVDOANLHsXGrkx2kBLRQWdhoZ32jgonDexGh644QBnNpgOnUsYYG4bXZVaOpBs_QfnB-c6C8ga4B3AOym_t8vRZKlNA_Dud4B3NfnOvtjDvwzABUBbgNbD7wfV9Q5--vTPz_DhyYtM-kCKho_XHJoqziQ1HNZSUzdaxaF_yajSSjAqxe98WRMMcB6sIMAJvZi14rVQlyqucecxSveq4jXABbTOCObqDoLsdrCF0GsaCMgWMiolHOd5BwiaKp7VDHfwbGJGoGx74YXpAu588P7MXY4fx1UFv949Pf3iXQs3VCntoOWSM-cb0DFJYx4xWhQVQb6lJjgsq54uYmrHGDphX7QOowHesEOQ2OjuZWd0-8SbV9OoSCnyKfbEG2Ed92sIc3rXnNwxU05mXKdhkwEPCta9Yk5o5S19FEP746e79fMdtH3ZCr8lyr45ZbnTcJ60jXCHvlwy3Y4ZPP5ZdEb_6p2Fd8LanluAd5CqCgrFZF_xsDuYofYAS8q-OUMZXw7TPzvKvsGqb7tzmNASoOLR6MbQFlLT9C1XzkNAgHe687Mw3XZCcrPgx05qw41vk1Q1C2d69Q3gXSlUgGNwof042nV-dO-63i0tXBzzdEFtu7AvytEjIFuhHJcQkI3VvWEckLuBJvI0T71SQjWwo9ZCgLPd6En46Bs-U0Ubz5BBrWCrq15ybzUTw9m4YnxN8Guewu36fgHI3XZ9Dx-UdaYfpngOeejDNuifohhmGLdjNiYFwARBdEQIoZAaBcKEkhqGWJE1IGv7Yod_Ho1QLnj_iw8HwPmrkaH_2WvrDKctwKnPQ6Gc35IA5x-JAcC36EhIgimpz0eMh40uYKO4jOGzaBSVf6Oqkl40H-cemu2SdT5VUPg5C-FRKKtRHGWIpjFGcL833Dpt-N64EV2KEuDdMU_3abyQQvXHRaP6oaNzB8NptbR6iQJxFMcYzXjJdJq0zAhCJTRUWP4OfeaV06Ac-4Ez5XiunOA8KSAt9bvIJ8rYD5wpJ1Mfp0kd0ZhOEuIfSvzW82d_8zXP9Hs4anye0O_znBgsnobDHuB8ybSsQlxeh16PTToFyDmK6xxNAM75vV3fPzxzObQOh_C_uRu65yjbv-uKA7z-4ZSMCKnzeYizC1qKGX6Tdmjd6IpvdNv6rXoddwN7FV4sFWQHaiDTyrrLnp-x1yJSYIZnC8unC8vyoia5v1Byf4O9tLq3UNGW2y4cBsWA_jVPt-v7L_rKYv88Il_z1BufBl5PiuLCzbhi2Ztu3urJwTg5F_Of4K-oYtnr8weTCF0QcpoVb6etrvg9V2tV3bXCbdf3Pweuolkxg4vmcFGU1fU7s3Qt5S21gt1Kzb7ZWRjP19qYl-mPo8coq-sZOr5AJ5y_jW569Yv6TNlBKH6inKH_oe_EvuyoccvwoLyU_mNmej4y3ye0iMrkQ_vkg8xvbh8PGc-ciClL6fRMvVD2r5QJ01WY_-m5K3rXuWaXTZ4VZYKnXLtHP_T0Xvq_iT6ch5gymkzuco-aXqKmRfEO1M_heTeP49j0UzDTYr7TswtMhme3p-QNZS_jk-4V-KHtXrPwL4MtcT736eyOSVOGk4TAUfjsOH_zhasiXHuvZL4K22gVyrIBT0p2Pc2KizcNRwmFLRXqh1ZU4ApNa2BMMLp4lsUoJ3C_92-uvXXUuP1k1vc-0bzIbJZo7raSRpTDQf_HFsSLiPLzVJtxuC-ke6N45WuqiBQXdfFNtSJVQQp6w1dRmsVZHqOC3BxWKCNlXuZ1VJQxJ1VWZjzDaVajJC0iHsc3YoURJijCGYriPCJLFlVxXBNSRwXO48zXK7ylQi7DNwDaNDehXlyliOD4RtKSS3v6LsesQmlZ9o0FMZLCOvs6zAkn-Wpet7Np3R5K4Xl5rhU85ulNb-Tq42VtIP1vAAAA__-5VYO-">