ftq: add perf counter for predecode redirect

src/main/scala/xiangshan/decoupled-frontend/NewFtq.scala

@@ -919,6 +919,7 @@ class Ftq(implicit p: Parameters) extends XSModule with HasCircularQueuePtrHelpe
     XSPerfAccumulate("bpu_to_ftq_stall", enq.valid && !enq.ready)
     XSPerfAccumulate("mispredictRedirect", perf_redirect.valid && RedirectLevel.flushAfter === perf_redirect.bits.level)
     XSPerfAccumulate("replayRedirect", perf_redirect.valid && RedirectLevel.flushItself(perf_redirect.bits.level))
+    XSPerfAccumulate("predecodeRedirect", fromIfuRedirect.valid)
     
     XSPerfAccumulate("to_ifu_bubble", io.toIfu.req.ready && !io.toIfu.req.valid)