From 458c277c8056bad59a69bcd821c7a4bee093cdc9 Mon Sep 17 00:00:00 2001
From: James Cherry <cherry@CerezoBook.local>
Date: Mon, 22 Jun 2026 19:14:30 -0700
Subject: [PATCH] Sta::delaysInvalidFromFanin

Signed-off-by: James Cherry <cherry@CerezoBook.local>
---
 include/sta/Sta.hh |  1 -
 search/Sta.cc      | 28 ++++++++--------------------
 2 files changed, 8 insertions(+), 21 deletions(-)

diff --git a/include/sta/Sta.hh b/include/sta/Sta.hh
index da5da08b..bded0b9a 100644
--- a/include/sta/Sta.hh
+++ b/include/sta/Sta.hh
@@ -1513,7 +1513,6 @@ protected:
                                   bool infer_latches);
   void delayCalcPreamble();
   void delaysInvalidFrom(const Port *port);
-  void delaysInvalidFromFanin(const Port *port);
   void deleteEdge(Edge *edge);
   void netParasiticCaps(Net *net,
                         const RiseFall *rf,
diff --git a/search/Sta.cc b/search/Sta.cc
index 87a3f7d1..e159c7be 100644
--- a/search/Sta.cc
+++ b/search/Sta.cc
@@ -3965,7 +3965,7 @@ Sta::setPortExtPinCap(const Port *port,
     for (const MinMax *mm : min_max->range())
       sdc->setPortExtPinCap(port, rf1, mm, cap);
   }
-  delaysInvalidFromFanin(port);
+  delaysInvalidFrom(port);
 }
 
 void
@@ -4020,7 +4020,7 @@ Sta::setPortExtWireCap(const Port *port,
     for (const MinMax *mm : min_max->range())
       sdc->setPortExtWireCap(port, rf1, mm, cap);
   }
-  delaysInvalidFromFanin(port);
+  delaysInvalidFrom(port);
 }
 
 void
@@ -4038,7 +4038,7 @@ Sta::setPortExtFanout(const Port *port,
 {
   for (const MinMax *mm : min_max->range())
     sdc->setPortExtFanout(port, mm, fanout);
-  delaysInvalidFromFanin(port);
+  delaysInvalidFrom(port);
 }
 
 void
@@ -5017,20 +5017,6 @@ Sta::delaysInvalidFrom(Vertex *vertex)
   graph_delay_calc_->delayInvalid(vertex);
 }
 
-void
-Sta::delaysInvalidFromFanin(const Port *port)
-{
-  if (graph_) {
-    Instance *top_inst = network_->topInstance();
-    Pin *pin = network_->findPin(top_inst, port);
-    Vertex *vertex, *bidirect_drvr_vertex;
-    graph_->pinVertices(pin, vertex, bidirect_drvr_vertex);
-    delaysInvalidFromFanin(vertex);
-    if (bidirect_drvr_vertex)
-      delaysInvalidFromFanin(bidirect_drvr_vertex);
-  }
-}
-
 void
 Sta::delaysInvalidFromFanin(const Pin *pin)
 {
@@ -5070,9 +5056,11 @@ Sta::delaysInvalidFromFanin(Vertex *vertex)
   VertexInEdgeIterator edge_iter(vertex, graph_);
   while (edge_iter.hasNext()) {
     Edge *edge = edge_iter.next();
-    Vertex *from_vertex = edge->from(graph_);
-    delaysInvalidFrom(from_vertex);
-    search_->requiredInvalid(from_vertex);
+    if (edge->isWire()) {
+      Vertex *from_vertex = edge->from(graph_);
+      delaysInvalidFrom(from_vertex);
+      search_->requiredInvalid(from_vertex);
+    }
   }
 }