[clang] [Clang] Add __builtin_get_counted_by builtin (PR #102549)

[Bill Wendling via cfe-commits]

================
@@ -4678,6 +4678,19 @@ void FieldDecl::printName(raw_ostream &OS, const 
PrintingPolicy &Policy) const {
   DeclaratorDecl::printName(OS, Policy);
 }
 
+const FieldDecl *FieldDecl::FindCountedByField() const {
+  const auto *CAT = getType()->getAs<CountAttributedType>();
+  if (!CAT)
+    return nullptr;
+
+  const auto *CountDRE = cast<DeclRefExpr>(CAT->getCountExpr());
----------------
bwendling wrote:

See https://github.com/llvm/llvm-project/pull/104235

https://github.com/llvm/llvm-project/pull/102549
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