diff --git a/tests/simple/repwhile.v b/tests/simple/repwhile.v
new file mode 100644
index 00000000..8c5b4b37
--- /dev/null
+++ b/tests/simple/repwhile.v
@@ -0,0 +1,20 @@
+module test001(output [63:0] y);
+	function [7:0] mylog2;
+		input [31:0] value;
+		begin
+			mylog2 = 0;
+			while (value > 0) begin
+				value = value >> 1;
+				mylog2 = mylog2 + 1;
+			end
+		end
+	endfunction
+
+	genvar i;
+	generate
+		for (i = 0; i < 64; i = i+1) begin
+			localparam tmp = mylog2(i);
+			assign y[i] = tmp;
+		end
+	endgenerate
+endmodule