[clang] Assertion `F.isPresplitCoroutine() && "The frontend uses Switch-Resumed ABI should emit " "\"presplitcoroutine\" attribute for the coroutine."' failed.

Reproducer:
https://godbolt.org/z/TM94jcnfo
```cpp
void foo() { __builtin_coro_id(32, 0, 0, 0); }
```

Backtrace:
```console
clang++: /root/llvm-project/llvm/lib/Transforms/Coroutines/CoroEarly.cpp:239: void {anonymous}::Lowerer::lowerEarlyIntrinsics(llvm::Function&): Assertion `F.isPresplitCoroutine() && "The frontend uses Switch-Resumed ABI should emit " "\"presplitcoroutine\" attribute for the coroutine."' failed.
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++ -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 -std=c++20
1. parser at end of file
2. Optimizer
3. Running pass "coro-cond(coro-early,cgscc(coro-split),coro-cleanup,globaldce)" on module ""
4. Running pass "coro-early" on module ""
#0 0x00000000041b0358 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41b0358)
#1 0x00000000041ad784 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41ad784)
#2 0x00000000040f1ab8 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#3 0x000072089a042520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x000072089a0969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#5 0x000072089a042476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#6 0x000072089a0287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#7 0x000072089a02871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#8 0x000072089a039e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#9 0x00000000059bda54 (anonymous namespace)::Lowerer::lowerEarlyIntrinsics(llvm::Function&) CoroEarly.cpp:0:0
#10 0x00000000059bdc7f llvm::CoroEarlyPass::run(llvm::Module&, llvm::AnalysisManager&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x59bdc7f)
#11 0x00000000053837ee llvm::detail::PassModel>::run(llvm::Module&, llvm::AnalysisManager&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x53837ee)
#12 0x0000000003b0cd91 llvm::PassManager>::run(llvm::Module&, llvm::AnalysisManager&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3b0cd91)
#13 0x00000000059b9d91 llvm::CoroConditionalWrapper::run(llvm::Module&, llvm::AnalysisManager&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x59b9d91)
#14 0x0000000005382ebe llvm::detail::PassModel>::run(llvm::Module&, llvm::AnalysisManager&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x5382ebe)
#15 0x0000000003b0cd91 llvm::PassManager>::run(llvm::Module&, llvm::AnalysisManager&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3b0cd91)
#16 0x000000000446417b (anonymous namespace)::EmitAssemblyHelper::RunOptimizationPipeline(clang::BackendAction, std::unique_ptr>&, std::unique_ptr>&, clang::BackendConsumer*) BackendUtil.cpp:0:0
#17 0x0000000004467781 clang::emitBackendOutput(clang::CompilerInstance&, clang::CodeGenOptions&, llvm::StringRef, llvm::Module*, clang::BackendAction, llvm::IntrusiveRefCntPtr, std::unique_ptr>, clang::BackendConsumer*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4467781)
#18 0x0000000004aec915 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4aec915)
#19 0x000000000687864c clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x687864c)
#20 0x0000000004aecd68 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4aecd68)
#21 0x0000000004dd8b75 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4dd8b75)
#22 0x0000000004d54a0e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4d54a0e)
#23 0x0000000004ecf74d clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4ecf74d)
#24 0x0000000000db8ce0 cc1_main(llvm::ArrayRef, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xdb8ce0)
#25 0x0000000000daf84a ExecuteCC1Tool(llvm::SmallVectorImpl&, llvm::ToolContext const&, llvm::IntrusiveRefCntPtr) driver.cpp:0:0
#26 0x0000000000daf9cd int llvm::function_ref&)>::callback_fn&)>(long, llvm::SmallVectorImpl&) driver.cpp:0:0
#27 0x0000000004b55ea9 void llvm::function_ref::callback_fn>, std::__cxx11::basic_string, std::allocator>*, bool*) const::'lambda'()>(long) Job.cpp:0:0
#28 0x00000000040f1f54 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x40f1f54)
#29 0x0000000004b564bf clang::driver::CC1Command::Execute(llvm::ArrayRef>, std::__cxx11::basic_string, std::allocator>*, bool*) const (.part.0) Job.cpp:0:0
#30 0x0000000004b17822 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4b17822)
#31 0x0000000004b187ce clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl>&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4b187ce)
#32 0x0000000004b1ff05 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4b1ff05)
#33 0x0000000000db5209 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xdb5209)
#34 0x0000000000c66b74 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc66b74)
#35 0x000072089a029d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#36 0x000072089a029e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#37 0x0000000000daf2e5 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xdaf2e5)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134
```

Start with the reproducer using clang++ in C++20 mode and inspect llvm/lib/Transforms/Coroutines/CoroEarly.cpp at Lowerer::lowerEarlyIntrinsics, where the assertion occurs. Reproduce the crash, then trace how the builtin coroutine input reaches the coro-early pass. Done means the reproducer no longer aborts with this assertion and regression coverage verifies the behavior.

Written by the indexing model from the issue text.