Update bug-12597.php

Author: staabm

tests/PHPStan/Rules/Variables/data/bug-12597.php

@@ -20,3 +20,33 @@ public function test(int $type): void
 
 	public function message(string $message): void {}
 }
+
+class HelloWorld2
+{
+	public function test(mixed $type): void
+	{
+		if (is_int($type) || is_object($type)) {
+			$message = 'Hello!';
+		}
+
+		if (is_int($type)) {
+			$this->message($message);
+		}
+	}
+
+	public function test2(mixed $type): void
+	{
+		if ($type instanceof Foo || $type instanceof Bar) {
+			$message = 'Hello!';
+		}
+
+		if ($type instanceof Foo) {
+			$this->message($message);
+		}
+	}
+
+	public function message(string $message): void
+	{
+	}
+}
+