diff --git a/mlir/lib/Target/LLVMIR/Dialect/LLVMIR/LLVMToLLVMIRTranslation.cpp b/mlir/lib/Target/LLVMIR/Dialect/LLVMIR/LLVMToLLVMIRTranslation.cpp
--- a/mlir/lib/Target/LLVMIR/Dialect/LLVMIR/LLVMToLLVMIRTranslation.cpp
+++ b/mlir/lib/Target/LLVMIR/Dialect/LLVMIR/LLVMToLLVMIRTranslation.cpp
@@ -308,6 +308,10 @@
         moduleTranslation.lookupBlock(switchOp.getDefaultDestination()),
         switchOp.getCaseDestinations().size());
 
+    // Handle switch with zero cases.
+    if (!switchOp.getCaseValues())
+      return success();
+
     auto *ty = llvm::cast<llvm::IntegerType>(
         moduleTranslation.convertType(switchOp.getValue().getType()));
     for (auto i :
diff --git a/mlir/test/Target/LLVMIR/llvmir.mlir b/mlir/test/Target/LLVMIR/llvmir.mlir
--- a/mlir/test/Target/LLVMIR/llvmir.mlir
+++ b/mlir/test/Target/LLVMIR/llvmir.mlir
@@ -2024,6 +2024,21 @@
 
 // -----
 
+// CHECK-LABEL: @switch_empty
+llvm.func @switch_empty(%arg0 : i32) -> i32 {
+  // CHECK:      switch i32 %[[SWITCH_arg0:[0-9]+]], label %[[SWITCHDEFAULT_bb1:[0-9]+]] [
+  // CHECK-NEXT: ]
+  llvm.switch %arg0 : i32, ^bb1 [
+  ]
+
+  // CHECK:      [[SWITCHDEFAULT_bb1]]:
+  // CHECK-NEXT:   ret i32 %[[SWITCH_arg0]]
+^bb1:
+  llvm.return %arg0 : i32
+}
+
+// -----
+
 // CHECK-LABEL: @switch_args
 llvm.func @switch_args(%arg0: i32) -> i32 {
   %0 = llvm.mlir.constant(5 : i32) : i32