<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/150362>150362</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            clang trunk crashed with aligned and address_space attribute on bitint. fatal error: error in backend: cannot lower memory intrinsic in address space 256.
        </td>
    </tr>

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

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

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

<pre>
    clang trunk crashed with `aligned` and `address_space` attribute on `bitint`.

Compiler explorer: https://godbolt.org/z/4q3vqM3vn

```
$cat mutant.c
struct c {
  _BitInt(10) a;
} __attribute__((aligned(256)));
struct d {
  struct c b[];
};
__attribute__((address_space(256))) struct d e;
struct c f;
void g() { e.b[0] = f; }
```

The full stack dump:
```
fatal error: error in backend: cannot lower memory intrinsic in address space 256
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: /opt/compiler-explorer/clang-assertions-trunk/bin/clang -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -fno-verbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics -g0 <source>
1.      <eof> parser at end of file
2.      Code generation
3.      Running pass 'Function Pass Manager' on module '<source>'.
4.      Running pass 'X86 DAG->DAG Instruction Selection' on function '@g'
 #0 0x0000000003fc9168 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3fc9168)
 #1 0x0000000003fc6594 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3fc6594)
 #2 0x0000000003f0b2c6 llvm::CrashRecoveryContext::HandleExit(int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3f0b2c6)
 #3 0x0000000003fbda7e llvm::sys::Process::Exit(int, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3fbda7e)
 #4 0x0000000000d9d660 LLVMErrorHandler(void*, char const*, bool) cc1_main.cpp:0:0
 #5 0x0000000003f16123 llvm::report_fatal_error(llvm::Twine const&, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3f16123)
 #6 0x00000000055aac6a (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x55aac6a)
 #7 0x00000000055aac95 checkAddrSpaceIsValidForLibcall(llvm::TargetLowering const*, unsigned int) SelectionDAG.cpp:0:0
 #8 0x0000000005605a65 llvm::SelectionDAG::getMemcpy(llvm::SDValue, llvm::SDLoc const&, llvm::SDValue, llvm::SDValue, llvm::SDValue, llvm::Align, bool, bool, llvm::CallInst const*, std::optional<bool>, llvm::MachinePointerInfo, llvm::MachinePointerInfo, llvm::AAMDNodes const&, llvm::BatchAAResults*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x5605a65)
 #9 0x000000000558d7cf llvm::SelectionDAGBuilder::visitIntrinsicCall(llvm::CallInst const&, unsigned int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x558d7cf)
#10 0x00000000055915c3 llvm::SelectionDAGBuilder::visitCall(llvm::CallInst const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x55915c3)
#11 0x00000000055a49e4 llvm::SelectionDAGBuilder::visit(llvm::Instruction const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x55a49e4)
#12 0x0000000005638e1d llvm::SelectionDAGISel::SelectBasicBlock(llvm::ilist_iterator_w_bits<llvm::ilist_detail::node_options<llvm::Instruction, true, false, void, true, llvm::BasicBlock>, false, true>, llvm::ilist_iterator_w_bits<llvm::ilist_detail::node_options<llvm::Instruction, true, false, void, true, llvm::BasicBlock>, false, true>, bool&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x5638e1d)
#13 0x0000000005639c34 llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x5639c34)
#14 0x000000000563b245 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x563b245)
#15 0x0000000005626c0f llvm::SelectionDAGISelLegacy::runOnMachineFunction(llvm::MachineFunction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x5626c0f)
#16 0x00000000032d47f3 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (.part.0) MachineFunctionPass.cpp:0:0
#17 0x00000000038fb79f llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x38fb79f)
#18 0x00000000038fbb51 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x38fbb51)
#19 0x00000000038fc3c1 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x38fc3c1)
#20 0x000000000427a8b1 clang::emitBackendOutput(clang::CompilerInstance&, clang::CodeGenOptions&, 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*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x427a8b1)
#21 0x0000000004976d03 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x4976d03)
#22 0x000000000666d5bc clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x666d5bc)
#23 0x0000000004977108 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x4977108)
#24 0x0000000004c69e45 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x4c69e45)
#25 0x0000000004be6b3e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x4be6b3e)
#26 0x0000000004d5db71 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x4d5db71)
#27 0x0000000000d9fd9f cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0xd9fd9f)
#28 0x0000000000d969fa ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#29 0x00000000049de109 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
#30 0x0000000003f0b204 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x3f0b204)
#31 0x00000000049de71f 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
#32 0x00000000049a0ced clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x49a0ced)
#33 0x00000000049a1d7e clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x49a1d7e)
#34 0x00000000049a9de5 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0x49a9de5)
#35 0x0000000000d9c24f clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0xd9c24f)
#36 0x0000000000c50784 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0xc50784)
#37 0x000075587ac29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#38 0x000075587ac29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#39 0x0000000000d964a5 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+0xd964a5)
clang: error: clang frontend command failed with exit code 70 (use -v to see invocation)
Compiler returned: 70
```

</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJzkWltz27oR_jXwC0YaCrw_-IGWrTRn7MYTu5m-cUAAlNCAgA4A-tJf3wFIiRfLOU6rnGmnGWdE4bL49sNid7kCNoZvJWOXIL4C8fUFbu1O6UuOGyyVfG1Ua4i5qBR9vSQCyy20upXfIdHY7BiFz9zuIEgCLJwUCpIAYkl9C6WaGVOaPSbMt1uredVaBpV0AypuubQgCZYgKEBQrFWz54JpyF72QmmmQVjAnbV7A8ICoA1Am62ilRJ2qfQWoM0_AdpEv4dPv9-FT7KTAZKg_wsKgCKCLWxai6VdEhAUxuqWWEggSK9AUEBYXnH7WVqAslUAUA4xCF0HSK9hWR7xliVAGUDZQUeUoTgBKO___JReND2KPq5VdcQeJXcPp8RPCJsuAo_y2WQ9Auvu-5PiFG69oNxhgGzpFg5AfA1BeO2HQbf6jKOgeNwxWLdCQGMx-Q5p2-wd39NxNbZYQKa18rviHyCXsMLkO5PUtREspbJQqGemYcMapV8hl1ZzaThxY3v9oNcPOu2C4v72pni4gaatGm4hhlW7hZrtlbbQqvnmc7trqyVRDUAbIZ4OH4u9Vv9gxAK04ca0zAC08UbIJREtZdDuWGevHq7Vnt413Gu214owYxiFRrW6a3YzsTGKcGwZhbqV0BDN99aZ6cOMI2e7-b1WW40biPW2bZi0DjIEaKP2DhPpzXpxNGu08SdpgY1h2nIlzcIfKoA2FZeHbrjY0mes60UEF1u4UE4i3u-d3NbuW7s0cNE4_eFi8ZIlC2yahXmVFr-A8JpLywRc1FItnpiulGGuHy4e4GKxJWRhlRJkh7kE4fUPkbrBRuK92SkLFzVRQukF5XgrlbGcmG4Nz-60eRtAEK57WsMbEBQrxxUI10zVILyBe6wN0xBbyCSFqoY1FwwEBXLD1ooyuGWSaewIAkERuuavrZRcbuEeGwMBSjetJK4f3ruGOyzx1qFOnYdpFG0Fc6MmOFDq9jE6Je3vWQKvi08LEN5cF5_gZ9kdMif_gQnmn3rh9WFhJz4Ktu4jcJseBjB4CQ7_wprkqySD3lrDAoSFeTXdw73m0npzeuwMMhsGafxcKmM1ww1AiTNK5yjdwXbn-z-0K4CugpcemHMuHezVDHYS59Ep2GvBsGz3X-QD30osAMpa6QMIhUI54ecF6WAMINEUZFAhkoxArp0VfmVEPTH9ulbSshfb9fwFSyrYzQt3rv78XHogA8xwCrOiOGWnTcB7n-7LGNwaVkqJM4P0MAaQ0RhkQHOaJAG8vf12d-N8e0eYBihzgQWgwoEiO6whUdLYvuGAkpBV2WAul2Tv_GLg_3fLxFMuVskKhSMuOl9f-vBSduFlfBAen7lkhyWTX0SMxzQQk4wRxzHGJMHnW64XOCyXvlkujyHZMfK9oFQ_uFj52XzDgtON0re8IliIKUdYb5m9dWHXObPx_hyPZm_yRy92XXw6sVfZBEoSxDiJR3s1nt21bJm9Yw3Zv04APVx_w6L1sXTceKvIZCf_cMJHGwuXlg22MXyOPAMWwrnzCTvG0q5X7Z1WWIBw7ae6KDGefYfJjkt2r1xU1Z9lrX6uvyjurv-qKDPv6H-FLdkVxVdmWmGNR3dGA-83crC4fGpxGU1J_c42X7VcUJ-Ig7B44sZny11Gt57b4Zzj5JQFnvEcedydVi5-BVOt8lVMwg9r9RFlzgrewxvAr2ZOIMpZ9GHwE-DjpOUXYffoBuxo6jXCjK3oO9g_PzAxbr3ChpMrocj3iQ5ccGNLbl3yp3T5XFbc5dTr-QjKLOa9QKkoK7uDPB06IsQZpNWd-6ixMP6hi29Dx_hYHtF1HuE4x4-de4n_JdSdhzyzYXRbPxhGODOMnITvGfXcMAohBj3MxDiOKf-vse4O5qBENFOiQtF7MXFQQrfyi-yjwgHvRIk3fWfXwuEctIinWqCEBO-5fKfFLdti8vrfootHO-gyyc9CRKO0Dt8G4wMc92I4UuSkBm-hL_dY26UvCZ2QN0udHKhJFhdmdZXmY4I3927e4f30p-GcKdPtYA1MZnPQVbz6AOg7_2I9tYG-6fyAq3g1AM5ngElIxoDFyGxH0D83--Fc_jmwHbAjbDRJTSKU4qxawW68h8Eabq-6QtoXX9oBKBt1H-qiLiZgSVifWk1GUPaJyS99IHmTX7uUbfuV1bO0tde-mEnroRTH6DMOS1a3hj-xr6xeS3tv9SRqPdX9WdtwwR5ejWVNH3COuXYr-e8tK_ezmRo_l_tnzS0rD3WP0STKatwKFzoFs-wPJoY3_ZpvVVoradrG7eZ5U-x-T4cdn-RzUZ4mNAh_hGdUpHjUWBrhq15_k3xmCsXD46GucWaj7UEOKkzSuiRJaFyRsQr3WBtWPDxOAT6wBk_e1H_BG3sPZoAazthOV0F24nj0Bt1XWxhpLTvYeHZuLh2EAeAkiYhIkrMoHgPcaLepxyM3Rnh2bN3qA7ZJahBVLKlCBn_kfU7y974y57bTDuGAf5IORDSmVTpxrj3SQY0nRfBb1G-d7JldRIdswJ3O6m81zetjIW0SpQqt8avz3uF6WoHr3dy8Knes2J0RfodvQJ_N0Cd5jeGB6vXq0Z_5cU2owUJ8Y8SqPhyfUGUWtZyM3tlNcn2q-RPTb3MwlE_dAGWrIPdkjIQe6val9nz63u6I-bjhhhAsRIXJ97KWDuZgIt3CvbmsV2vVNFjS-Wk9uW-nSk2n4vMxdh0nlCV5eVmtui-VeydycY47TJ7CyWDXUFqNuxdP3z0Th4Vw5q_0qN8NGZVzveF0hPspAKUCNxXFAKUDVSg7lPt_U9XbzZj_DBJUKIg-VKr_2soHXDMxrSn-eN_OXs0PhjfAcDU3q3RVw_9ns5i9IJ3efzRlDQeE0XdZ8_uF38S-A5UTRz2b6AZMKo4fG1rMfk44KnauDMArPBjRLEXBK5qyn6XjN1WZ97n4TVW3fFZ9_ZH_Pe79HnO37f0PTx-lrzeQX0yio2kgMZqRmFMWvwf4evQ8SQFOxP73yP8TSTxr9umJGWiLZ7GaoKh3YIdc4wDbO46iP_Z_HInPmF04TAPiSU4XkDhIswg6rOdbshM6LHlIx9I4zlJMUE7zoF9N8AqgzUuWlEm0EFy2L4utbLsOsjRqmXiJfsogMJsLZFEAy9LNKY3F2pYjhT68BItGS-TzJCzCMeyEn3NvnNhu0YNdDxeBupsqdZ_yQ9JbeI25OFwOYy_cmQ1lMPWMtobBxRO0ChrGIB_l4_n4EphmttWS-atFaTC7jnRBL0Oahzm-YJerNA5DFOZhcLG7xLQO04rgNMuTOs3TOs8CEtCAMpqucFZf8EsUoDhIURQgFIfBMmIprlmYRiHLUlZTEAWswVwsnf0vld5e-EtFl6s4CBN0IXDFhPGX5RDqWUIgvr7Ql_4uUtVuDYgCwY01gwjLrWDv35_rL5Z1V4_Gt8Cmd-a6C3NL-EsuYy0vWi0u__0bVz0_T5foXwEAAP__UtWW2g">