[clang] [HLSL] Rewrite semantics parsing (PR #152537)

[Steven Perron via cfe-commits]

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@@ -838,8 +854,6 @@ void SemaHLSL::CheckSemanticAnnotation(
     DiagnoseAttrStageMismatch(AnnotationAttr, ST, {llvm::Triple::Compute});
     break;
   case attr::HLSLSV_Position:
-    // TODO(#143523): allow use on other shader types & output once the overall
-    // semantic logic is implemented.
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s-perron wrote:

Why did you remove the TODO? This does not seem to be working at the output to the vertex shader yet.

https://github.com/llvm/llvm-project/pull/152537