fhdl.ir: fix port threading code.

2018-12-12 13:00:50 +00:00 · 2018-12-12 13:00:50 +00:00 · ad9b45adcd
commit ad9b45adcd
parent 0fac1f8d0f
2 changed files with 2 additions and 2 deletions
--- a/nmigen/fhdl/ir.py
+++ b/nmigen/fhdl/ir.py
@ -66,7 +66,7 @@ class Fragment:
            subfrag, sub_ins, sub_outs = subfrag.prepare(ports=self_used | ports,
                                                         clock_domains=clock_domains)
            frag.subfragments[n] = (subfrag, name)
-            ins  |= sub_ins - self_driven
+            ins  -= sub_outs
            outs |= ports & sub_outs

        frag.add_ports(ins, outs)