[clang] [clang-repl] Extend the C support. (PR #89804)

[Vassil Vassilev via cfe-commits]

================
@@ -407,6 +406,16 @@ void IncrementalParser::CleanUpPTU(PartialTranslationUnit &PTU) {
       }
     }
   }
+
+  // FIXME: We should de-allocate MostRecentTU
+  for (Decl *D : MostRecentTU->decls()) {
+    if (!isa<NamedDecl>(D))
+      continue;
+    // Check if we need to clean up the IdResolver chain.
+    NamedDecl *ND = cast<NamedDecl>(D);
----------------
vgvassilev wrote:

OTOH, that loop is easier to be spelled like:
```
for() {
  if (auto *ND = dyn_cast<NamedDecl>(D))
    // do some work
}
```

That violates the loop early exit policy :)

https://github.com/llvm/llvm-project/pull/89804