[clang] [HLSL] Support packoffset attribute in AST (PR #89836)

[Chris B via cfe-commits]

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@@ -4372,6 +4372,13 @@ def HLSLResourceBinding: InheritableAttr {
   let Documentation = [HLSLResourceBindingDocs];
 }
 
+def HLSLPackOffset: HLSLAnnotationAttr {
+  let Spellings = [HLSLAnnotation<"packoffset">];
+  let LangOpts = [HLSL];
+  let Args = [IntArgument<"Offset">];
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llvm-beanz wrote:

The feedback here still isn't resolved. The argument is an IdentifierArgument with special parsing handling, it isn't an integer. We can store the parsed integer values in the attribute but we shouldn't be calling the argument an IntArgument.

https://github.com/llvm/llvm-project/pull/89836