[clang] [Sema] Instantiate destructors for initialized members (PR #128866)

[Aaron Ballman via cfe-commits]

================
@@ -5283,6 +5283,102 @@ Sema::SetDelegatingInitializer(CXXConstructorDecl *Constructor,
   return false;
 }
 
+static void MarkFieldDestructorReferenced(Sema &S, SourceLocation Location,
+                                          FieldDecl *Field) {
+  if (Field->isInvalidDecl())
+    return;
+
+  // Don't destroy incomplete or zero-length arrays.
+  if (isIncompleteOrZeroLengthArrayType(S.Context, Field->getType()))
+    return;
+
+  QualType FieldType = S.Context.getBaseElementType(Field->getType());
+
+  const RecordType *RT = FieldType->getAs<RecordType>();
+  if (!RT)
+    return;
+
+  CXXRecordDecl *FieldClassDecl = cast<CXXRecordDecl>(RT->getDecl());
----------------
AaronBallman wrote:

```suggestion
  auto *FieldClassDecl = cast<CXXRecordDecl>(RT->getDecl());
```

https://github.com/llvm/llvm-project/pull/128866