Add testcases from GH

1 files changed, 23 insertions, 0 deletions

diff --git a/ice40/regressions/issue0151/top.v b/ice40/regressions/issue0151/top.v
new file mode 100644
index 0000000..7e987f2
--- /dev/null
+++ b/ice40/regressions/issue0151/top.v
@@ -0,0 +1,23 @@
+module top (
+  input wire in_n,
+  output wire out
+);
+
+wire clk;
+
+SB_GB_IO #(
+  .PIN_TYPE(6'b000000),
+  .IO_STANDARD("SB_LVDS_INPUT")
+) differential_clock_input (
+  .PACKAGE_PIN(in_n),
+  .GLOBAL_BUFFER_OUTPUT(clk)
+);
+
+assign out = cntr;
+reg cntr = 1'd0;
+
+always @(posedge clk) begin
+  cntr <= !cntr;
+end
+
+endmodule