beanz added inline comments.

================
Comment at: clang/lib/Driver/ToolChains/HLSL.h:32
                 Action::OffloadKind DeviceOffloadKind) const override;
-  std::string ComputeEffectiveClangTriple(const llvm::opt::ArgList &Args,
-                                          types::ID InputType) const override;
+  static std::string parseTargetProfile(StringRef TargetProfile);
 };
----------------
I don't like using an empty string as a sentinel for an error. Since this is no 
longer overriding an existing method, we should change it. Probably the easiest 
change is to llvm::Optional. Then you can return `None` in the failure cases.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D125585/new/

https://reviews.llvm.org/D125585

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