diff --git a/openfpga_flow/benchmarks/micro_benchmark/clk_on_lut/clk_on_lut.v b/openfpga_flow/benchmarks/micro_benchmark/clk_on_lut/clk_on_lut.v
new file mode 100644
index 000000000..80814e49b
--- /dev/null
+++ b/openfpga_flow/benchmarks/micro_benchmark/clk_on_lut/clk_on_lut.v
@@ -0,0 +1,21 @@
+/////////////////////////////////////////
+//  Functionality: A register driven by a combinational logic with clk signal
+//  Author:        Xifan Tang
+////////////////////////////////////////
+`timescale 1ns / 1ps
+
+module clk_on_lut(a, b, q, out, clk);
+
+input wire clk;
+input wire a;
+input wire b;
+output reg q;
+output wire out;
+
+always @(posedge clk) begin
+  q <= a;
+end
+
+assign out = b & clk;
+
+endmodule