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

[Chris B via cfe-commits]

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@@ -8545,6 +8545,11 @@ def dxc_entrypoint : Option<["--", "/", "-"], "E", KIND_JOINED_OR_SEPARATE>,
                      Group<dxc_Group>,
                      Visibility<[DXCOption]>,
                      HelpText<"Entry point name">;
+def dxc_hlsl_version : Option<["/", "-"], "HV", KIND_JOINED_OR_SEPARATE>,
+                     Group<dxc_Group>,
+                     Visibility<[DXCOption]>,
+                     HelpText<"HLSL Version">,
+                     Values<"2016, 2017, 2018, 2021, 202x">;
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llvm-beanz wrote:

Oh! Also look at some of the other options. You can use a combination of `Values`, `NormalizedValues` and `MarshallingInfoEnum`, to have the parser generated to parse directly to the `HLSLLangStd` enumeration.

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