1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/MCA/HardwareUnits/Scheduler.cpp b/llvm/lib/MCA/HardwareUnits/Scheduler.cpp
index c7091203595..0f0f2ffb832 100644
--- a/llvm/lib/MCA/HardwareUnits/Scheduler.cpp
+++ b/llvm/lib/MCA/HardwareUnits/Scheduler.cpp
@@ -198,7 +198,8 @@ InstRef Scheduler::select() {
         Strategy->compare(IR, ReadySet[QueueIndex])) {
       Instruction &IS = *IR.getInstruction();
       uint64_t BusyResourceMask = Resources->checkAvailability(IS.getDesc());
-      IS.setCriticalResourceMask(BusyResourceMask);
+      if (BusyResourceMask)
+        IS.setCriticalResourceMask(BusyResourceMask);
       BusyResourceUnits |= BusyResourceMask;
       if (!BusyResourceMask)
         QueueIndex = I;