back.rtlil: don't emit wires for empty signals.

Fixes #312.
2020-01-31 03:38:58 +00:00 · 2020-01-31 03:38:58 +00:00 · 3ac13eb8f9
parent b72c3fc7f6
commit 3ac13eb8f9
1 changed files with 3 additions and 0 deletions
--- a/nmigen/back/rtlil.py
+++ b/nmigen/back/rtlil.py
@ -278,6 +278,9 @@ class _ValueCompilerState:
        self.ports[signal] = (len(self.ports), kind)

    def resolve(self, signal, prefix=None):
+        if len(signal) == 0:
+            return "{ }", "{ }"
+
        if signal in self.wires:
            return self.wires[signal]