Fix topological bug in NetBuilderHV::_do_xG_1PinM2().

* Bug: In NetBuilderHV::_do_xG_1PinM2(), when the M2 pin is on the *east*
    side and there are three globals, we must swap htee1 & htee2.
      Otherwise, we the SW/NE contacts do not have the right numbers
    of free segments attach.
* New: In AnabaticEngine::cleanupGlobal(), check that no global component
    is left behind, sure sign that the global to detailed building went
    wrong.

anabatic/src/AnabaticEngine.cpp

@@ -1074,6 +1074,17 @@ namespace Anabatic {
     UpdateSession::open();
     for ( GCell* gcell : _gcells ) gcell->cleanupGlobal();
     UpdateSession::close();
+
+    for ( Net* net : getCell()->getNets() ) {
+      for ( Component* component : net->getComponents() ) {
+        if (getConfiguration()->isGLayer(component->getLayer())) {
+          cerr << Error( "AnabaticEngine::cleanupGlobal(): Remaining global routing,\n"
+                         "        %s"
+                       , getString(component).c_str()
+                       ) << endl;
+        }
+      }
+    }
   }
 
 

anabatic/src/NetBuilderHV.cpp

@@ -863,6 +863,9 @@ namespace Anabatic {
       AutoContact* htee2 = AutoContactHTee::create( getGCell(), getNet(), Session::getContactLayer(1) );
       AutoSegment::create( htee1, htee2, Flags::Horizontal );
       
+      if (pinDir == Pin::AccessDirection::EAST)
+        std::swap( htee1, htee2 );
+
       setSouthWestContact( htee1 );
       setNorthEastContact( htee2 );
     }