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-rw-r--r--passes/techmap/deminout.cc3
1 files changed, 2 insertions, 1 deletions
diff --git a/passes/techmap/deminout.cc b/passes/techmap/deminout.cc
index 9f0c7bf67..0cc3df2af 100644
--- a/passes/techmap/deminout.cc
+++ b/passes/techmap/deminout.cc
@@ -113,7 +113,8 @@ struct DeminoutPass : public Pass {
{
if (bits_numports[bit] > 1 || bits_inout.count(bit))
new_input = true, new_output = true;
-
+ if (bit == State::S0 || bit == State::S1)
+ new_output = true;
if (bits_written.count(bit)) {
new_output = true;
if (bits_tribuf.count(bit))