Java: Improve performance of GeneratedFileMarker.

Author: aschackmull

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

@@ -54,14 +54,17 @@ library class MarkerCommentGeneratedFile extends GeneratedFile {
 private class GeneratedFileMarker extends Top {
   GeneratedFileMarker() {
     exists(string msg | msg = this.(JavadocElement).getText() or msg = this.(KtComment).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.*")
+      msg.regexpMatch("(?i).*(" +
+          concat([
+                "\\bGenerated By\\b.*\\bDo not edit\\b",
+                "\\bThis (file|class|interface|art[ei]fact) (was|is|(has been)) (?:auto[ -]?)?gener(e?)ated",
+                "\\bAny modifications to this file will be lost\\b",
+                "\\bThis (file|class|interface|art[ei]fact) (was|is) (?:mechanically|automatically) generated\\b",
+                "\\bThe following code was (?:auto[ -]?)?generated (?:by|from)\\b",
+                "\\bAutogenerated by Thrift", "\\bGenerated By.*JavaCC",
+                "\\bGenerated from .* by ANTLR"
+              ], "|"
+          ) + ").*")
     )
   }
 }