From fb062c3426e8acb5b3f54dfed7209631208fec81 Mon Sep 17 00:00:00 2001 From: Eddie Hung Date: Sat, 13 Jul 2019 00:52:21 -0700 Subject: [PATCH] Add comment --- passes/techmap/abc9.cc | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/passes/techmap/abc9.cc b/passes/techmap/abc9.cc index 4a6ec3a47..658bb1225 100644 --- a/passes/techmap/abc9.cc +++ b/passes/techmap/abc9.cc @@ -787,6 +787,11 @@ void abc9_module(RTLIL::Design *design, RTLIL::Module *current_module, std::stri sink_cell->setParam("\\LUT", mask); } + // Since we have rewritten all sinks (which we know + // to be only LUTs) to be after the inverter, we can + // go ahead and clone the LUT with the expectation + // that the original driving LUT will become dangling + // and get cleaned away clone_lut: driver_mask = driver_lut->getParam("\\LUT"); for (auto &b : driver_mask.bits) { -- 2.30.2