message: Filter out builders used in monitor / syncronization opcodes
  Summary: As title.
diff: @@ -1050,7 +1050,7 @@ bool tainted_reg_escapes(
  TRACE(BUILDERS, 5, "Escaping instruction: %s\n", SHOW(insn));
  return true;
  }
  - } else if (is_conditional_branch(op)) {
  + } else if (is_conditional_branch(op) || is_monitor(op)) {
  if (tainted[insn->src(0)]) {
  // TODO(emmasevastian): Treat this case separate.
  return true;
  