[clang] [clang] Implement function pointer type discrimination (PR #96992)

[Daniil Kovalev via cfe-commits]

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@@ -4779,6 +4783,9 @@ bool CompilerInvocation::CreateFromArgsImpl(
   if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
     LangOpts.ObjCExceptions = 1;
 
+  LangOpts.FunctionPointerTypeDiscrimination =
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kovdan01 wrote:

Can we move this to `ParsePointerAuthArgs`?

https://github.com/llvm/llvm-project/pull/96992