Fix for SigSpec() == SigSpec(State::Sx, 0) to be true again

diff --git a/kernel/rtlil.cc b/kernel/rtlil.cc
index ded1cd60e34b4ab0795ee664a0505a5766274f52..bd2fd91a300c9e8609f56e0e37bd2c1711b681dc 100644 (file)
--- a/kernel/rtlil.cc
+++ b/kernel/rtlil.cc
@@ -3554,6 +3554,12 @@ bool RTLIL::SigSpec::operator ==(const RTLIL::SigSpec &other) const
        if (width_ != other.width_)
                return false;
 
+       // Without this, SigSpec() == SigSpec(State::S0, 0) will fail
+       //   since the RHS will contain one SigChunk of width 0 causing
+       //   the size check below to fail
+       if (width_ == 0)
+               return true;
+
        pack();
        other.pack();