Index: llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
===================================================================
--- llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -2029,6 +2029,7 @@
   case TargetOpcode::G_ATOMICRMW_ADD:
   case TargetOpcode::G_ATOMICRMW_SUB:
   case TargetOpcode::G_ATOMICRMW_AND:
+  case TargetOpcode::G_ATOMICRMW_NAND:
   case TargetOpcode::G_ATOMICRMW_OR:
   case TargetOpcode::G_ATOMICRMW_XOR:
   case TargetOpcode::G_ATOMICRMW_MIN: