<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/54423>54423</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [AArch64][SVE] Invalid size request on a scalable vector
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          stevesuzuki-arm
      </td>
    </tr>
</table>

<pre>
    `icmp <vscale x 24 x i8>`   https://godbolt.org/z/a1eeWPr4P

```
define <vscale x 24 x i1> @icmp_i8nxv24(<vscale x 24 x i8> %a0, <vscale x 24 x i8> %a1) #0 {
  %1 = icmp slt <vscale x 24 x i8> %a0, %a1
  ret <vscale x 24 x i1> %1
}
```

Crashes with target triple = "aarch64-linux-gnu" -mattr=+sve2 -O3

The same occurs with `fadd`, `fsub`, `fmul`, `fdiv` and `fcmp`
e.g. `fadd <vscale x 6 x float>` https://godbolt.org/z/s9n4Kbcnc

```
LLVM ERROR: Invalid size request on a scalable vector.
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 -x86-asm-syntax=intel -mattr=+sve2 -O3 <source>
1.      Running pass 'Function Pass Manager' on module '<source>'.
2.      Running pass 'AArch64 Instruction Selection' on function '@icmp_i8nxv24'
 #0 0x0000555cae1449ef PrintStackTraceSignalHandler(void*) Signals.cpp:0:0
 #1 0x0000555cae1421ad SignalHandler(int) Signals.cpp:0:0
 #2 0x00007fed067fc3c0 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x143c0)
 #3 0x00007fed062c903b raise (/lib/x86_64-linux-gnu/libc.so.6+0x4303b)
 #4 0x00007fed062a8859 abort (/lib/x86_64-linux-gnu/libc.so.6+0x22859)
 #5 0x0000555cae0875e8 llvm::report_fatal_error(llvm::Twine const&, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x30875e8)
 #6 0x0000555cae087758 (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x3087758)
 #7 0x0000555cae0e74c5 (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x30e74c5)
 #8 0x0000555cabd409fc llvm::EVT::getVectorNumElements() const (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0xd409fc)
 #9 0x0000555cadfe14c8 llvm::DAGTypeLegalizer::WidenVecRes_SETCC(llvm::SDNode*) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x2fe14c8)
#10 0x0000555cadfeb5eb llvm::DAGTypeLegalizer::WidenVectorResult(llvm::SDNode*, unsigned int) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x2feb5eb)
#11 0x0000555cadfac698 llvm::DAGTypeLegalizer::run() (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x2fac698)
#12 0x0000555cadfad7e6 llvm::SelectionDAG::LegalizeTypes() (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x2fad7e6)
#13 0x0000555cadf4361e llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x2f4361e)
#14 0x0000555cadf47233 llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x2f47233)
#15 0x0000555cadf48ee8 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (.part.960) SelectionDAGISel.cpp:0:0
#16 0x0000555cad487546 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x2487546)
#17 0x0000555cad93a7d6 llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x293a7d6)
#18 0x0000555cad93ab29 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x293ab29)
#19 0x0000555cad93b469 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x293b469)
#20 0x0000555cabb2f5c8 compileModule(char**, llvm::LLVMContext&) llc.cpp:0:0
#21 0x0000555caba86197 main (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0xa86197)
#22 0x00007fed062aa0b3 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x240b3)
#23 0x0000555cabb2604a _start (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0xb2604a)
Compiler returned: 139
```
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzFmF1z2jgUhn-NudHA2PL3BReEkG5nkzYTMuklI8sCvBG2V5Ipya_vkWyI5dIms8vsZoBYEnrPc3SOvsiq_GXqRG5BdzVy_PleUsIZOiAcwEeROP4CWhFCW6Vq6fgzB9_Aa1PlWcXVpBIbKL3Cm3iMfbsXwb3jXjvurPuM3O5lijlbFyU7Y8YDM8gJDMWqSMrDHgcOTs7zIAeHxHXw_Be8pt1zcAoPvouc-Kq1jnSDB52ukfFWcvU7hdaCkeq6C3aug9d16L7mxNdnfW8_54LILZPoe6G2SBGxAUklipozw-VgTIig2ygY86JsDuNN2UAdGu-IUgK-4eAruWdQ8dXvyz5uGZJkx1BFaSM6eTC9JnmuCbQnUJJN1ivtGt4r5cVeB5qUuSnCAJ3Q2WQzOapZAxDBe80roroseS9HZFoGf2a0pL_Jkdvbpzu0eHj4-gBC6HO5J7zIkSxeGYz_3w2TClUlIkgzkAww9oyqSkza3ve3i9lygcDRXaHgW1mzgW51JWCYqyEfDFKTTWi1gwLn--O_cS2qv0AUioWUYBEezLgUJeVNzpCC0aY6kCgj9FkJQllnfqmgAuUNDJ7fuedCU3ovqo0gOwQBb3asVBoCgn1T1doKENQFZ2LMDjWvBBO6jpNyMyZSMqGKqpRjJZryGRqyojScFI0rLUHqWgs1qm7URKLxIYmg224sX0pFDpAyRakYP5tBOpayagRlOn6G1tO0D01ZFuUG1WAeTMQ3TUk1BLrXFXekJBvNGOtA7Kq80cmLY0sMx92I4HOCs5nJcYiuBLda7SXjzDx1wuujUS09XBnibkqaCe4eXPgLw5AS5gVBytboXoDXJhiPOjrLYlMS_gfEkGvwZF8VuYNneolom-SE1jpkrnmftL2BNvZIjoZiYOldIdwJxWuWu1G8pj510WolIJsh3ivITr3aQViLDD4hhCt7BdANtdoKRvKJrCYwaa_cgxeACph-M-NbZjBNXT9DghSSfUCfauXIKAc-dLSUA1uZJEmYIpJVHyLvKWMMHS3l0BpjN4lDliAzG2EG-bN28q7WRBG-YkJUesjfmh-_6w2FwgSBIER6Lcuqirdrf_IvJ5gB9lsiCzkaIsdhckl7IGfZi217LA5oeDl7Rs6yl_TtZXngpmvaC8ni6bF9gM3rySy-X5rdgrN2YdNYaRuRSzG2BBZi2kfM1zA3aT9rrmefHl9qdss2sHu8gi1T-63IWQnED0yulovH-dxKpeX1lypn3bJwIXLckp3Q9ZriDtCzkGUfRofBBvqGq1-hz1FTSliKmN6u1GVd0aSWK57tCqFR-n4UQL1LkouRGcMWGR6Q5TGLemSnzQYQ25ojpAaWF-fT5i0-3-YL_Mhjv-D7DIW2dg5B_sTKWZkv4HSj0S_MaTAszmDAGetN5j3OtnbG-RWRBb3iFX2WVr6eDhRvC_clvdCQlhfhwIuEWXvMeS9A_Wt5R-gWdpgjsOXFT21HNyY1EWqS6rN1iobiPx8QNKG1peQB7DlBP18HpvQ5rAd5lu5nrIuMbotmja61PeWpT-K8z35zr3GPp8b_h7qFsqiTIXUG9t6nvjPnXTsPuqpLEwOQRZwOiLMg6hNzWMHoS_vcY_-8q98S-r_g1lh9bmxteFmG1yHs1Z2N03DSLRFmAzN72Bukvg7OK7jCHI7rBJg6O4ewtRtlJIm8NEY7UpSXcq6VtHzDg3MxcTMfDvb60LuScL9Xqx7AR8_IAYhYVvzBCEZuQFCrfynfWtGT1XmnpH_zaAScJvSF1fPTwZV9lE99yMSUjFShOJs64VV3t3PCaygsnxbw8PFb_KgRfPrPb-lhEGB_tJ3G1Fu7iZ_6eUSC2F2HJAiDmMWuPiiE8XoENhmXGhfwRsUUuxi7sJJ5cej7yQTnfhZFcO73U4xjuAoFLoM48ok2rH_PGImpYciajYRGXkgl3xphsPUJjB31SaO2lZhKxfZwdnttnosxEbuRwZ4a5h9Kge0Q">