[clang] [HLSL] Add NativeInt16Type langopt to control whether short type is supported. Enabled by default for all but HLSL. (PR #165584)

[Justin Bogner via cfe-commits]

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@@ -8628,6 +8628,10 @@ def fobjc_subscripting_legacy_runtime : Flag<["-"], "fobjc-subscripting-legacy-r
 def vtordisp_mode_EQ : Joined<["-"], "vtordisp-mode=">,
   HelpText<"Control vtordisp placement on win32 targets">,
   MarshallingInfoInt<LangOpts<"VtorDispMode">, "1">;
+def fnative_int16_type : Flag<["-"], "fnative-int16-type">,
+  HelpText<"Use 16 bit integer types">,
+  ImpliedByAnyOf<[!strconcat("!", hlsl.KeyPath)]>,
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bogner wrote:

This might deserve a comment explaining that we're implying the option *unless* we're in the HLSL language mode. I don't think I've seen logical operators used inside `ImpliedByAnyOf` like this elsewhere.

https://github.com/llvm/llvm-project/pull/165584