[clang] [BoundsSafety] Support late parsing for `counted_by` in type positions (PR #166491)

[Yeoul Na via cfe-commits]

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@@ -6447,21 +6472,33 @@ void Parser::ParseDeclaratorInternal(Declarator &D,
                     ((D.getContext() != DeclaratorContext::CXXNew)
                          ? AR_GNUAttributesParsed
                          : AR_GNUAttributesParsedAndRejected);
+    LateParsedAttrList LateAttrs(/*PSoon=*/true,
+                                 /*LateAttrParseExperimentalExtOnly=*/true);
     ParseTypeQualifierListOpt(DS, Reqs, /*AtomicOrPtrauthAllowed=*/true,
-                              !D.mayOmitIdentifier());
+                              !D.mayOmitIdentifier(), {}, &LateAttrs);
     D.ExtendWithDeclSpec(DS);
 
     // Recursively parse the declarator.
     Actions.runWithSufficientStackSpace(
         D.getBeginLoc(), [&] { ParseDeclaratorInternal(D, DirectDeclParser); });
-    if (Kind == tok::star)
+    if (Kind == tok::star) {
+      DeclaratorChunk::LateAttrListTy OpaqueLateAttrList;
+      if (getLangOpts().ExperimentalLateParseAttributes && !LateAttrs.empty()) {
+        if (!D.isFunctionDeclarator()) {
+          for (auto LA : LateAttrs) {
+            OpaqueLateAttrList.push_back(LA);
+          }
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rapidsna wrote:

Updated it!

https://github.com/llvm/llvm-project/pull/166491