1 files changed, 37 insertions, 0 deletions
diff --git a/tests/techmap/iopadmap.ys b/tests/techmap/iopadmap.ys
index c058d1607..b787bb55f 100644
--- a/tests/techmap/iopadmap.ys
+++ b/tests/techmap/iopadmap.ys
@@ -120,3 +120,40 @@ select -assert-count 1 g/t:iobuf
 select -assert-count 1 h/t:ibuf
 select -assert-count 1 h/t:iobuf
 select -assert-count 1 h/t:obuf
+
+
+# Check that \init attributes get moved from output buffer
+#   to buffer input
+design -reset
+read_verilog << EOT
+module obuf (input i, (* iopad_external_pin *) output o); endmodule
+module obuft (input i, input oe, (* iopad_external_pin *) output o); endmodule
+module iobuf (input i, input oe, output o, (* iopad_external_pin *) inout io); endmodule
+module sub(input i, output o); endmodule
+
+module a(input i, (* init=1'b1 *) output o);
+sub s(.i(i), .o(o));
+endmodule
+
+module b(input i, oe, output o);
+(* init=1'b1 *) wire w;
+sub s(.i(i), .o(w));
+assign o = oe ? w : 1'bz;
+endmodule
+
+module c(input i, oe, inout io);
+(* init=1'b1 *) wire w;
+sub s(.i(i), .o(w));
+assign io = oe ? w : 1'bz;
+endmodule
+EOT
+opt_clean
+tribuf
+simplemap
+iopadmap -bits -outpad obuf i:o -toutpad obuft oe:i:o -tinoutpad iobuf oe:o:i:io
+select -assert-count 1 a/c:s %co a/a:init=1'1 %i
+select -assert-count 1 a/a:init=1'1
+select -assert-count 1 b/c:s %co b/a:init=1'1 %i
+select -assert-count 1 b/a:init=1'1
+select -assert-count 1 c/c:s %co c/a:init=1'1 %i
+select -assert-count 1 c/a:init=1'1