1 files changed, 23 insertions, 0 deletions
diff --git a/tests/arch/ecp5/bug1836.ys b/tests/arch/ecp5/bug1836.ys
new file mode 100644
index 000000000..15cdf4228
--- /dev/null
+++ b/tests/arch/ecp5/bug1836.ys
@@ -0,0 +1,23 @@
+read_verilog <<EOT
+module top(
+	input clk,
+	output reg [15:0] sig1, sig2
+);
+	reg [7:0] ptr1, ptr2;
+	reg [15:0] mem [0:255];
+
+	initial begin
+		$readmemh("bug1836.mem", mem);
+	end
+
+	always @(posedge clk) begin
+		sig1 <= mem[ptr1];
+		ptr1 <= ptr1 + 3;
+		sig2 <= mem[ptr2];
+		ptr2 <= ptr2 + 7;
+	end
+endmodule
+EOT
+
+synth_ecp5 -top top
+select -assert-count 1 t:DP16KD