Correct way too slow clock-tree. Backport Katana fixes to Kite.

* Bug: In Hurricane::Net::setExternal(), do not perform an UpdateSession
    inside this function, it leads to unbearibly slow operation in the
    clock-tree plugin.
* Bug: In Kite, backport corrections done in Katana and also relevant
    for Kite.
* New: In Cumulus.ChipPlugin.py add support for Python profiling with
    cProfile. Disabled under normal operation, but will certainly come in
    handy sometimes.

cumulus/src/plugins/ChipPlugin.py

@@ -20,6 +20,8 @@ try:
   import os.path
   import optparse
   import math
+  import cProfile
+  import pstats
   import Cfg
   import Hurricane
   from   Hurricane import DataBase
@@ -151,10 +153,18 @@ class PlaceCore ( chip.Configuration.ChipConfWrapper ):
         etesian.place()
         etesian.destroy()
 
+     #profile = cProfile.Profile()
+     #profile.enable()
       ht.connectLeaf()
      #ht.prune()
       ht.route()
       ht.save( self.cell )
+     #profile.disable()
+
+     #stats = pstats.Stats( profile, stream=sys.stderr )
+     #stats.strip_dirs()
+     #stats.sort_stats( 'cumtime' )
+     #stats.print_stats()
     else:
       if Cfg.getParamString('clockTree.placerEngine').asString() != 'Etesian':
         mauka  = Mauka.MaukaEngine.create( coreCell )

hurricane/src/hurricane/Net.cpp

@@ -465,23 +465,23 @@ void Net::setGlobal(bool isGlobal)
 void Net::setExternal(bool isExternal)
 // ***********************************
 {
-    if (isExternal != _isExternal) {
-        if (!isExternal) {
-            if (!getConnectedSlavePlugs().isEmpty())
-                throw Error("Can't set internal : has connected slave plugs");
-            _direction = Direction::UNDEFINED;
-        }
-        _isExternal = isExternal;
-        if (_isExternal) {
-            UpdateSession::open();
-            setPosition(Point(0,0));
-            for_each_instance(instance, _cell->getSlaveInstances()) {
-                Plug::_create(instance, this);
-                end_for;
-            }
-            UpdateSession::close();
-        }
+  if (isExternal != _isExternal) {
+    if (not isExternal) {
+      if (not getConnectedSlavePlugs().isEmpty())
+        throw Error( "Net::setExternal(): Cannot set \"%s\" of \"%s\" internal, has connected slave plugs"
+                   , getString(getName()).c_str()
+                   , getString(getCell()->getName()).c_str()
+                   );
+      _direction = Direction::UNDEFINED;
     }
+    _isExternal = isExternal;
+    if (_isExternal) {
+      setPosition( Point(0,0) );
+      for ( Instance* instance : _cell->getSlaveInstances() ) {
+        Plug::_create( instance, this );
+      }
+    }
+  }
 }
 
 void Net::setAutomatic(bool isAutomatic)

katabatic/src/AutoHorizontal.cpp

@@ -426,6 +426,16 @@ namespace Katabatic {
       if (spinFlags & SegSourceBottom) setFlags( SegTargetBottom );
       if (spinFlags & SegTargetTop   ) setFlags( SegSourceTop );
       if (spinFlags & SegTargetBottom) setFlags( SegSourceBottom );
+
+      unsigned int invalidatedFlags = _flags & (SegInvalidatedSource|SegInvalidatedTarget);
+      unsetFlags( SegInvalidatedSource|SegInvalidatedTarget );
+      if (invalidatedFlags & SegInvalidatedSource) setFlags( SegInvalidatedTarget );
+      if (invalidatedFlags & SegInvalidatedTarget) setFlags( SegInvalidatedSource );
+
+      unsigned int terminalFlags = _flags & SegStrongTerminal;
+      unsetFlags( SegStrongTerminal );
+      if (terminalFlags & SegSourceTerminal) setFlags( SegTargetTerminal );
+      if (terminalFlags & SegTargetTerminal) setFlags( SegSourceTerminal );
     }
   }
 

kite/src/Session.cpp

@@ -245,6 +245,8 @@ namespace Kite {
     }
 
     _doRemovalEvents();
+    for ( Track* track : _sortEvents ) track->doReorder();
+    _sortEvents.clear();
 
     cdebug_tabw(159,-1);
     return count;