[llvm] [RISCV][P-ext] Custom lower v8i8 mulh* on RV64. NFC (PR #218160)

[via llvm-commits]

github-actions[bot] wrote:

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

* 136113 tests passed
* 3281 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/mlir-opt.exe</summary>

```
FAILED: [code=4294967295] bin/mlir-opt.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\mlir\tools\mlir-opt\CMakeFiles\mlir-opt.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\mlir-opt.rsp  /out:bin\mlir-opt.exe /implib:lib\mlir-opt.lib /pdb:bin\mlir-opt.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\mlir-opt.rsp /out:bin\mlir-opt.exe /implib:lib\mlir-opt.lib /pdb:bin\mlir-opt.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: __cdecl llvm::InstCombinePass::InstCombinePass(struct llvm::InstCombineOptions)
>>> referenced by LLVMPasses.lib(PassBuilderPipelines.cpp.obj):(private: class llvm::PassManager<class llvm::Function, class llvm::AnalysisManager<class llvm::Function>> __cdecl llvm::PassBuilder::buildO1FunctionSimplificationPipeline(enum llvm::OptimizationLevel, enum llvm::ThinOrFullLTOPhase))
>>> referenced by LLVMPasses.lib(PassBuilderPipelines.cpp.obj):(private: class llvm::PassManager<class llvm::Function, class llvm::AnalysisManager<class llvm::Function>> __cdecl llvm::PassBuilder::buildO1FunctionSimplificationPipeline(enum llvm::OptimizationLevel, enum llvm::ThinOrFullLTOPhase))
>>> referenced by LLVMPasses.lib(PassBuilderPipelines.cpp.obj):(private: class llvm::PassManager<class llvm::Function, class llvm::AnalysisManager<class llvm::Function>> __cdecl llvm::PassBuilder::buildO1FunctionSimplificationPipeline(enum llvm::OptimizationLevel, enum llvm::ThinOrFullLTOPhase))
>>> referenced 18 more times

lld-link: error: undefined symbol: public: void __cdecl llvm::InstCombinePass::printPipeline(class llvm::raw_ostream &, class llvm::function_ref<class llvm::StringRef __cdecl(class llvm::StringRef)>)
>>> referenced by LLVMPasses.lib(PassBuilderPipelines.cpp.obj):(private: static void __cdecl llvm::detail::PassModel<class llvm::Function, class llvm::InstCombinePass, class llvm::AnalysisManager<class llvm::Function>>::printPipelineImpl(class llvm::detail::PassConcept<class llvm::Function, class llvm::AnalysisManager<class llvm::Function>> &, class llvm::raw_ostream &, class llvm::function_ref<class llvm::StringRef __cdecl(class llvm::StringRef)>))
>>> referenced by LLVMPasses.lib(PassBuilder.cpp.obj)

lld-link: error: undefined symbol: public: class llvm::PreservedAnalyses __cdecl llvm::InstCombinePass::run(class llvm::Function &, class llvm::AnalysisManager<class llvm::Function> &)
>>> referenced by LLVMPasses.lib(PassBuilderPipelines.cpp.obj):(private: static class llvm::PreservedAnalyses __cdecl llvm::detail::PassModel<class llvm::Function, class llvm::InstCombinePass, class llvm::AnalysisManager<class llvm::Function>>::runImpl(class llvm::detail::PassConcept<class llvm::Function, class llvm::AnalysisManager<class llvm::Function>> &, class llvm::Function &, class llvm::AnalysisManager<class llvm::Function> &))
>>> referenced by LLVMPasses.lib(PassBuilder.cpp.obj)
```
</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/218160