diff options
Diffstat (limited to 'passes/opt')
| -rw-r--r-- | passes/opt/opt_ffinv.cc | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/passes/opt/opt_ffinv.cc b/passes/opt/opt_ffinv.cc index 5d989dafd..3f7b4bc4a 100644 --- a/passes/opt/opt_ffinv.cc +++ b/passes/opt/opt_ffinv.cc @@ -64,6 +64,7 @@ struct OptFfInvWorker log_assert(d_inv == nullptr); d_inv = port.cell; } + if (!d_inv) return false; if (index.query_is_output(ff.sig_q)) return false; @@ -140,6 +141,7 @@ struct OptFfInvWorker log_assert(d_lut == nullptr); d_lut = port.cell; } + if (!d_lut) return false; if (index.query_is_output(ff.sig_q)) return false; @@ -167,6 +169,7 @@ struct OptFfInvWorker log_assert(q_inv == nullptr); q_inv = port.cell; } + if (!q_inv) return false; ff.flip_rst_bits({0}); ff.sig_q = q_inv->getPort(ID::Y); |