系统版本：22.03LTS,
llvm版本：llvm-12.0.1-2.oe2203.x86_64
编译ebpf时会崩溃退出
测试程序：

#include <stdio.h>
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>

__u32 test_data32 = 0;
__u32 test1_result = 0;

SEC("sockops")
int bpf_sockmap(struct bpf_sock_ops *skops)
{
        test1_result = __sync_fetch_and_add(&test_data32, 1);
        bpf_printk("test");
        return 0;
}

char _license[] SEC("license") = "GPL";
int _version SEC("version") = 1;

crash：
[root@k8s-node2 test]# clang -target bpf -D__x86_64__ -O2 -c test.c
fatal error: error in backend: Invalid usage of the XADD return value
PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments: clang -target bpf -D__x86_64__ -O2 -c test.c

1.  <eof> parser at end of file
   

2.  Code generation
   

3.  Running pass 'Function Pass Manager' on module 'test.c'.
   

4.  Running pass 'BPF PreEmit Checking' on function '@bpf_sockmap'
   

#0 0x00007f5a6f33f0ad llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/lib64/libLLVM-12.so+0xbb70ad)
#1 0x00007f5a6f33cf84 llvm::sys::RunSignalHandlers() (/usr/lib64/libLLVM-12.so+0xbb4f84)
#2 0x00007f5a6f27e404 llvm::CrashRecoveryContext::HandleExit(int) (/usr/lib64/libLLVM-12.so+0xaf6404)
#3 0x00007f5a6f337a6e llvm::sys::Process::Exit(int, bool) (/usr/lib64/libLLVM-12.so+0xbafa6e)
#4 0x0000557621b6683c (/usr/bin/clang-12+0x1383c)
#5 0x00007f5a6f28d478 llvm::report_fatal_error(llvm::Twine const&, bool) (/usr/lib64/libLLVM-12.so+0xb05478)
#6 0x00007f5a6f28d5ba (/usr/lib64/libLLVM-12.so+0xb055ba)
#7 0x00007f5a71348bb5 (/usr/lib64/libLLVM-12.so+0x2bc0bb5)
#8 0x00007f5a6f6794a7 (/usr/lib64/libLLVM-12.so+0xef14a7)
#9 0x00007f5a6f460a1d llvm::FPPassManager::runOnFunction(llvm::Function&) (/usr/lib64/libLLVM-12.so+0xcd8a1d)
#10 0x00007f5a6f460e93 llvm::FPPassManager::runOnModule(llvm::Module&) (/usr/lib64/libLLVM-12.so+0xcd8e93)
#11 0x00007f5a6f460472 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/usr/lib64/libLLVM-12.so+0xcd8472)
#12 0x00007f5a75a98aec (/usr/lib64/libclang-cpp.so.12+0x178eaec)
#13 0x00007f5a75a9a403 clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::HeaderSearchOptions const&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::DataLayout const&, llvm::Module*, clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_deletellvm::raw_pwrite_stream >) (/usr/lib64/libclang-cpp.so.12+0x1790403)
#14 0x00007f5a75d948b2 (/usr/lib64/libclang-cpp.so.12+0x1a8a8b2)
#15 0x00007f5a74cd5079 clang::ParseAST(clang::Sema&, bool, bool) (/usr/lib64/libclang-cpp.so.12+0x9cb079)
#16 0x00007f5a76442fd9 clang::FrontendAction::Execute() (/usr/lib64/libclang-cpp.so.12+0x2138fd9)
#17 0x00007f5a763ea1cb clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/usr/lib64/libclang-cpp.so.12+0x20e01cb)
#18 0x00007f5a764b2f88 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/usr/lib64/libclang-cpp.so.12+0x21a8f88)
#19 0x0000557621b6749c cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/usr/bin/clang-12+0x1449c)
#20 0x0000557621b64cd6 (/usr/bin/clang-12+0x11cd6)
#21 0x00007f5a7611ded5 (/usr/lib64/libclang-cpp.so.12+0x1e13ed5)
#22 0x00007f5a6f27e293 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/usr/lib64/libLLVM-12.so+0xaf6293)
#23 0x00007f5a7611efd6 (/usr/lib64/libclang-cpp.so.12+0x1e14fd6)
#24 0x00007f5a760f4b07 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&) const (/usr/lib64/libclang-cpp.so.12+0x1deab07)
#25 0x00007f5a760f52b6 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*> >&) const (/usr/lib64/libclang-cpp.so.12+0x1deb2b6)
#26 0x00007f5a760ff14b clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*> >&) (/usr/lib64/libclang-cpp.so.12+0x1df514b)
#27 0x0000557621b628e1 main (/usr/bin/clang-12+0xf8e1)
#28 0x00007f5a6e2e2210 (/usr/lib64/libc.so.6+0x2d210)
#29 0x00007f5a6e2e22bc __libc_start_main (/usr/lib64/libc.so.6+0x2d2bc)
#30 0x0000557621b64105 _start (/usr/bin/clang-12+0x11105)
[root@k8s-node2 test]#