[clang] [llvm] [HLSL] Add `Increment`/`DecrementCounter` methods to structured buffers (PR #114148)

[Helena Kotas via cfe-commits]

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@@ -343,27 +336,224 @@ struct TemplateParameterListBuilder {
     Params.clear();
 
     QualType T = Builder.Template->getInjectedClassNameSpecialization();
-    T = S.Context.getInjectedClassNameType(Builder.Record, T);
+    T = AST.getInjectedClassNameType(Builder.Record, T);
 
     return Builder;
   }
 };
+
+// Builder for methods of builtin types. Allows adding methods to builtin types
+// using the builder pattern like this:
+//
+//   BuiltinTypeMethodBuilder(Sema, RecordBuilder, "MethodName", ReturnType)
+//       .addParam("param_name", Type, InOutModifier)
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hekota wrote:

I'll keep the `addParam` method decl since it is mentioned here in the comment but replace the body with `llvm_unreachable`. We can add the implementation when it can be tested.

https://github.com/llvm/llvm-project/pull/114148