Kotlin: Performance tweak

Author: igfoo

java/ql/lib/semmle/code/java/GeneratedFiles.qll

@@ -46,17 +46,24 @@ abstract class GeneratedFile extends File { }
  */
 library class MarkerCommentGeneratedFile extends GeneratedFile {
   MarkerCommentGeneratedFile() {
-    exists(JavadocElement t | t.getFile() = this |
-      exists(string msg | msg = t.getText() |
-        msg.regexpMatch("(?i).*\\bGenerated By\\b.*\\bDo not edit\\b.*") or
-        msg.regexpMatch("(?i).*\\bThis (file|class|interface|art[ei]fact) (was|is|(has been)) (?:auto[ -]?)?gener(e?)ated.*") or
-        msg.regexpMatch("(?i).*\\bAny modifications to this file will be lost\\b.*") or
-        msg.regexpMatch("(?i).*\\bThis (file|class|interface|art[ei]fact) (was|is) (?:mechanically|automatically) generated\\b.*") or
-        msg.regexpMatch("(?i).*\\bThe following code was (?:auto[ -]?)?generated (?:by|from)\\b.*") or
-        msg.regexpMatch("(?i).*\\bAutogenerated by Thrift.*") or
-        msg.regexpMatch("(?i).*\\bGenerated By.*JavaCC.*") or
-        msg.regexpMatch("(?i).*\\bGenerated from .* by ANTLR.*")
-      )
+    any(GeneratedFileMarker t).getFile() = this
+  }
+}
+
+/**
+ * A marker comment that indicates that it is in a generated file.
+ */
+private class GeneratedFileMarker extends Top {
+  GeneratedFileMarker() {
+    exists(string msg | msg = this.(JavadocElement).getText() |
+      msg.regexpMatch("(?i).*\\bGenerated By\\b.*\\bDo not edit\\b.*") or
+      msg.regexpMatch("(?i).*\\bThis (file|class|interface|art[ei]fact) (was|is|(has been)) (?:auto[ -]?)?gener(e?)ated.*") or
+      msg.regexpMatch("(?i).*\\bAny modifications to this file will be lost\\b.*") or
+      msg.regexpMatch("(?i).*\\bThis (file|class|interface|art[ei]fact) (was|is) (?:mechanically|automatically) generated\\b.*") or
+      msg.regexpMatch("(?i).*\\bThe following code was (?:auto[ -]?)?generated (?:by|from)\\b.*") or
+      msg.regexpMatch("(?i).*\\bAutogenerated by Thrift.*") or
+      msg.regexpMatch("(?i).*\\bGenerated By.*JavaCC.*") or
+      msg.regexpMatch("(?i).*\\bGenerated from .* by ANTLR.*")
     )
   }
 }