[clang] [llvm] [clang][ARM64EC] Add support for hybrid_patchable attribute. (PR #99478)

[Eli Friedman via llvm-commits]

================
@@ -6886,6 +6886,13 @@ static void checkAttributesAfterMerging(Sema &S, NamedDecl &ND) {
     }
   }
 
+  if (HybridPatchableAttr *Attr = ND.getAttr<HybridPatchableAttr>()) {
+    if (!ND.isExternallyVisible()) {
+      S.Diag(Attr->getLocation(),
+             diag::warn_attribute_hybrid_patchable_non_extern);
+      ND.dropAttr<SelectAnyAttr>();
----------------
efriedma-quic wrote:

```suggestion
      ND.dropAttr<HybridPatchableAttr>();
```

https://github.com/llvm/llvm-project/pull/99478