[clang][bytecode][NFC] Check pointer types in canClassify() (#168069)

And return true. Also make those two functions const.

Author: tbaederr

clang/lib/AST/ByteCode/Context.h

@@ -98,20 +98,22 @@ class Context final {
     return classify(E->getType());
   }
 
-  bool canClassify(QualType T) {
+  bool canClassify(QualType T) const {
     if (const auto *BT = dyn_cast<BuiltinType>(T)) {
       if (BT->isInteger() || BT->isFloatingPoint())
         return true;
       if (BT->getKind() == BuiltinType::Bool)
         return true;
     }
+    if (T->isPointerOrReferenceType())
+      return true;
 
     if (T->isArrayType() || T->isRecordType() || T->isAnyComplexType() ||
         T->isVectorType())
       return false;
     return classify(T) != std::nullopt;
   }
-  bool canClassify(const Expr *E) {
+  bool canClassify(const Expr *E) const {
     if (E->isGLValue())
       return true;
     return canClassify(E->getType());