[llvm] [RISCV][P-ext] Fold packed insert-into-zero to zero-extend (PR #208006)

[via llvm-commits]

github-actions[bot] wrote:

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

* 135210 tests passed
* 3507 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/clang-tidy.exe</summary>

```
FAILED: [code=4294967295] bin/clang-tidy.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\clang\tools\extra\clang-tidy\tool\CMakeFiles\clang-tidy.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\clang-tidy.rsp  /out:bin\clang-tidy.exe /implib:lib\clang-tidy.lib /pdb:bin\clang-tidy.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\clang-tidy.rsp /out:bin\clang-tidy.exe /implib:lib\clang-tidy.lib /pdb:bin\clang-tidy.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: LLVMInitializeXCoreTargetInfo
>>> referenced by clangTidyMain.lib(ClangTidyMain.cpp.obj):(void __cdecl llvm::InitializeAllTargetInfos(void))

lld-link: error: undefined symbol: class llvm::Target & __cdecl llvm::getTheXCoreTarget(void)
>>> referenced by LLVMXCoreDesc.lib(XCoreMCTargetDesc.cpp.obj):(LLVMInitializeXCoreTargetMC)
>>> referenced by LLVMXCoreDesc.lib(XCoreMCTargetDesc.cpp.obj):(LLVMInitializeXCoreTargetMC)
>>> referenced by LLVMXCoreDesc.lib(XCoreMCTargetDesc.cpp.obj):(LLVMInitializeXCoreTargetMC)
>>> referenced 4 more times
```
</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/208006