From db871138a06c73cc03cd1194c0946e2f7e6a9e9f Mon Sep 17 00:00:00 2001
From: James Cherry <cherry@parallaxsw.com>
Date: Sat, 23 Oct 2021 09:34:16 -0700
Subject: [PATCH] set_max_fanout applies to input ports

Signed-off-by: James Cherry <cherry@parallaxsw.com>
---
 search/CheckFanoutLimits.cc | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/search/CheckFanoutLimits.cc b/search/CheckFanoutLimits.cc
index 6d73c7a0..a8a3c138 100644
--- a/search/CheckFanoutLimits.cc
+++ b/search/CheckFanoutLimits.cc
@@ -110,6 +110,12 @@ CheckFanoutLimits::findLimit(const Pin *pin,
   limit = min_max->initValue();
   exists = false;
 
+  // Default to top ("design") limit.
+  // Applies to input ports as well as instance outputs.
+  Cell *top_cell = network->cell(network->topInstance());
+  sdc->fanoutLimit(top_cell, min_max,
+                   limit, exists);
+
   float limit1;
   bool exists1;
   if (network->isTopLevelPort(pin)) {
@@ -148,11 +154,6 @@ CheckFanoutLimits::findLimit(const Pin *pin,
     }
   }
   else {
-    // Default to top ("design") limit.
-    Cell *top_cell = network->cell(network->topInstance());
-    sdc->fanoutLimit(top_cell, min_max,
-                     limit, exists);
-
     Cell *cell = network->cell(network->instance(pin));
     sdc->fanoutLimit(cell, min_max,
 		     limit1, exists1);