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-rw-r--r--tests/various/aiger_dff.ys7
1 files changed, 7 insertions, 0 deletions
diff --git a/tests/various/aiger_dff.ys b/tests/various/aiger_dff.ys
new file mode 100644
index 000000000..057f3d774
--- /dev/null
+++ b/tests/various/aiger_dff.ys
@@ -0,0 +1,7 @@
+read_verilog -icells <<EOT
+module top(input clk, d, output q);
+\$_DFF_N_ dffn(.C(clk), .D(d), .Q(q));
+endmodule
+EOT
+write_aiger -zinit -ywmap aiger_dff.out /dev/null
+!grep -qF negedge aiger_dff.out