[clang] [llvm] [HLSL] Add -HV option translation to clang-dxc.exe (PR #83938)

[Xiang Li via cfe-commits]

================
@@ -226,6 +226,47 @@ HLSLToolChain::TranslateArgs(const DerivedArgList &Args, 
StringRef BoundArch,
       A->claim();
       continue;
     }
+    if (A->getOption().getID() == options::OPT_dxc_hlsl_version) {
+      // Translate -HV into -std for llvm
+      // depending on the value given
+      llvm::StringRef value(A->getValue());
+      llvm::StringRef acceptedValues(
+          Opts.getOptionValues(options::OPT_dxc_hlsl_version));
+      llvm::SmallVector<StringRef, 8> validValues;
+      acceptedValues.split(validValues, ", ");
+      if (value == validValues[0]) {
----------------
python3kgae wrote:

We can do something like 
https://github.com/llvm/llvm-project/blob/main/clang/lib/Frontend/CompilerInvocation.cpp#L3689
 where the OPT_std_EQ is checked 
 with the LangStandard::getLangKind at 
https://github.com/llvm/llvm-project/blob/main/clang/lib/Basic/LangStandards.cpp#L64

Maybe add LangStandard::getHLSLLangKind ?

https://github.com/llvm/llvm-project/pull/83938
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