diff --git a/mlir/include/mlir/Dialect/LLVMIR/LLVMOps.td b/mlir/include/mlir/Dialect/LLVMIR/LLVMOps.td
--- a/mlir/include/mlir/Dialect/LLVMIR/LLVMOps.td
+++ b/mlir/include/mlir/Dialect/LLVMIR/LLVMOps.td
@@ -791,6 +791,8 @@
 def LLVM_SinOp : LLVM_UnaryIntrinsicOp<"sin">;
 def LLVM_SqrtOp : LLVM_UnaryIntrinsicOp<"sqrt">;
 def LLVM_PowOp : LLVM_BinarySameArgsIntrinsicOp<"pow">;
+def LLVM_BitReverseOp : LLVM_UnaryIntrinsicOp<"bitreverse">;
+def LLVM_CtPopOp : LLVM_UnaryIntrinsicOp<"ctpop">;
 
 //
 // Vector Reductions.
diff --git a/mlir/test/Dialect/LLVMIR/roundtrip.mlir b/mlir/test/Dialect/LLVMIR/roundtrip.mlir
--- a/mlir/test/Dialect/LLVMIR/roundtrip.mlir
+++ b/mlir/test/Dialect/LLVMIR/roundtrip.mlir
@@ -103,6 +103,12 @@
 // CHECK: "llvm.intr.pow"(%arg1, %arg1) : (!llvm.float, !llvm.float) -> !llvm.float
   %31 = "llvm.intr.pow"(%arg1, %arg1) : (!llvm.float, !llvm.float) -> !llvm.float
 
+// CHECK: "llvm.intr.bitreverse"(%{{.*}}) : (!llvm.i32) -> !llvm.i32
+  %32 = "llvm.intr.bitreverse"(%arg0) : (!llvm.i32) -> !llvm.i32
+
+// CHECK: "llvm.intr.ctpop"(%{{.*}}) : (!llvm.i32) -> !llvm.i32
+  %33 = "llvm.intr.ctpop"(%arg0) : (!llvm.i32) -> !llvm.i32
+
 // CHECK:  llvm.return
   llvm.return
 }
diff --git a/mlir/test/Target/llvmir-intrinsics.mlir b/mlir/test/Target/llvmir-intrinsics.mlir
--- a/mlir/test/Target/llvmir-intrinsics.mlir
+++ b/mlir/test/Target/llvmir-intrinsics.mlir
@@ -117,6 +117,24 @@
   llvm.return
 }
 
+// CHECK-LABEL: @bitreverse_test
+llvm.func @bitreverse_test(%arg0: !llvm.i32, %arg1: !llvm<"<8 x i32>">) {
+  // CHECK: call i32 @llvm.bitreverse.i32
+  "llvm.intr.bitreverse"(%arg0) : (!llvm.i32) -> !llvm.i32
+  // CHECK: call <8 x i32> @llvm.bitreverse.v8i32
+  "llvm.intr.bitreverse"(%arg1) : (!llvm<"<8 x i32>">) -> !llvm<"<8 x i32>">
+  llvm.return
+}
+
+// CHECK-LABEL: @ctpop_test
+llvm.func @ctpop_test(%arg0: !llvm.i32, %arg1: !llvm<"<8 x i32>">) {
+  // CHECK: call i32 @llvm.ctpop.i32
+  "llvm.intr.ctpop"(%arg0) : (!llvm.i32) -> !llvm.i32
+  // CHECK: call <8 x i32> @llvm.ctpop.v8i32
+  "llvm.intr.ctpop"(%arg1) : (!llvm<"<8 x i32>">) -> !llvm<"<8 x i32>">
+  llvm.return
+}
+
 // CHECK-LABEL: @vector_reductions
 llvm.func @vector_reductions(%arg0: !llvm.float, %arg1: !llvm<"<8 x float>">, %arg2: !llvm<"<8 x i32>">) {
   // CHECK: call i32 @llvm.experimental.vector.reduce.add.v8i32