diff --git a/llvm/lib/CodeGen/ScheduleDAG.cpp b/llvm/lib/CodeGen/ScheduleDAG.cpp
--- a/llvm/lib/CodeGen/ScheduleDAG.cpp
+++ b/llvm/lib/CodeGen/ScheduleDAG.cpp
@@ -46,6 +46,10 @@
 static cl::opt<bool> StressSchedOpt(
   "stress-sched", cl::Hidden, cl::init(false),
   cl::desc("Stress test instruction scheduling"));
+
+static cl::opt<bool> SchedPrintCycles(
+  "sched-print-cycles", cl::Hidden, cl::init(false),
+  cl::desc("Report top/bottom cycles when dumping SUnit instances"));
 #endif
 
 void SchedulingPriorityQueue::anchor() {}
@@ -356,8 +360,12 @@
     dbgs() << "EntrySU";
   else if (&SU == &ExitSU)
     dbgs() << "ExitSU";
-  else
-    dbgs() << "SU(" << SU.NodeNum << ")";
+  else {
+    dbgs() << "SU(" << SU.NodeNum;
+    if (SchedPrintCycles)
+      dbgs() << " " << SU.TopReadyCycle << " " << SU.BotReadyCycle;
+    dbgs()<< ")";
+  }
 }
 
 LLVM_DUMP_METHOD void ScheduleDAG::dumpNodeAll(const SUnit &SU) const {
diff --git a/llvm/test/CodeGen/AArch64/sched-print-cycle.mir b/llvm/test/CodeGen/AArch64/sched-print-cycle.mir
new file mode 100644
--- /dev/null
+++ b/llvm/test/CodeGen/AArch64/sched-print-cycle.mir
@@ -0,0 +1,23 @@
+# RUN: llc -mtriple=arm64-apple-macos -mcpu=apple-m1 -sched-print-cycles=true \
+# RUN: -run-pass=machine-scheduler -debug-only=machine-scheduler -o - %s 2>&1 | FileCheck %s
+
+# RUN: llc -mtriple=arm64-apple-macos -mcpu=apple-m1 -sched-print-cycles=false \
+# RUN: -run-pass=machine-scheduler -debug-only=machine-scheduler -o - %s 2>&1 | FileCheck %s --check-prefix=NOCYCLES
+
+# REQUIRES: asserts
+---
+name: mul_mul
+tracksRegLiveness: true
+body:             |
+  bb.0:
+    liveins: $x0
+    $x1 = ADDXrr $x0, $x0
+    $x2 = ADDXrr $x1, $x1
+
+# CHECK-LABEL: *** Final schedule for %bb.0 ***
+# CHECK: SU(0 0 0):   $x1 = ADDXrr $x0, $x0
+# CHECK: SU(1 0 0):   $x2 = ADDXrr $x1, $x1
+
+# NOCYCLES-LABEL: *** Final schedule for %bb.0 ***
+# NOCYCLES: SU(0):   $x1 = ADDXrr $x0, $x0
+# NOCYCLES: SU(1):   $x2 = ADDXrr $x1, $x1