From: David Shah <dave@ds0.me>
Date: Wed, 12 Dec 2018 16:50:46 +0000 (+0000)
Subject: deminout: Don't demote constant-driven inouts to inputs
X-Git-Tag: yosys-0.9~375^2~1
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d3fe9465f3efc30daf54926d6b3d2743b5fb3e51;p=yosys.git

deminout: Don't demote constant-driven inouts to inputs

Signed-off-by: David Shah <dave@ds0.me>
---

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))