[llvm] [SelectionDAG] Keep inline asm clobbers live when read by a glued CopyFromReg (PR #227203)

[via llvm-commits]

github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Windows-->
# :window: Windows x64 Test Results

* 65226 tests passed
* 2195 tests skipped

All executed tests passed, but another part of the build **failed**. Click on a failure below to see the details.

<details>
<summary>[code=4294967295] bin/sancov.exe</summary>

```
FAILED: [code=4294967295] bin/sancov.exe
C:\Windows\system32\cmd.exe /C "cd . && C:\BuildTools\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin\cmake.exe -E vs_link_exe --msvc-ver=1944 --intdir=tools\sancov\CMakeFiles\sancov.dir --rc="C:\Program Files (x86)\Windows Kits\10\bin\10.0.26100.0\x64\rc.exe" --mt="C:\Program Files (x86)\Windows Kits\10\bin\10.0.26100.0\x64\mt.exe" --manifests  -- C:\clang\clang-msvc\bin\lld-link.exe /nologo @CMakeFiles\sancov.rsp  /out:bin\sancov.exe /implib:lib\sancov.lib /pdb:bin\sancov.pdb /version:0.0 /MANIFEST:NO /Brepro /INCREMENTAL:NO /subsystem:console  /STACK:10000000 && cd ."
LINK: command "C:\clang\clang-msvc\bin\lld-link.exe /nologo @CMakeFiles\sancov.rsp /out:bin\sancov.exe /implib:lib\sancov.lib /pdb:bin\sancov.pdb /version:0.0 /MANIFEST:NO /Brepro /INCREMENTAL:NO /subsystem:console /STACK:10000000" failed (exit code 1) with the following output:
lld-link: error: undefined symbol: public: static class llvm::Expected<class std::unique_ptr<class llvm::gsym::GsymReader, struct std::default_delete<class llvm::gsym::GsymReader>>> __cdecl llvm::gsym::GsymReader::openFile(class llvm::StringRef)
>>> referenced by LLVMSymbolize.lib(Symbolize.cpp.obj):(public: class llvm::Expected<class llvm::symbolize::SymbolizableModule *> __cdecl llvm::symbolize::LLVMSymbolizer::getOrCreateModuleInfo(class llvm::StringRef))

lld-link: error: undefined symbol: public: __cdecl llvm::gsym::GsymContext::GsymContext(class std::unique_ptr<class llvm::gsym::GsymReader, struct std::default_delete<class llvm::gsym::GsymReader>>)
>>> referenced by LLVMSymbolize.lib(Symbolize.cpp.obj):(public: class llvm::Expected<class llvm::symbolize::SymbolizableModule *> __cdecl llvm::symbolize::LLVMSymbolizer::getOrCreateModuleInfo(class llvm::StringRef))
```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/227203