Fixing performance problem in 'cone -s'

src/base/abc/abc.h

@@ -727,6 +727,7 @@ extern ABC_DLL Abc_Obj_t *        Abc_ObjAlloc( Abc_Ntk_t * pNtk, Abc_ObjType_t
 extern ABC_DLL void               Abc_ObjRecycle( Abc_Obj_t * pObj );
 extern ABC_DLL Abc_Obj_t *        Abc_NtkCreateObj( Abc_Ntk_t * pNtk, Abc_ObjType_t Type );
 extern ABC_DLL void               Abc_NtkDeleteObj( Abc_Obj_t * pObj );
+extern ABC_DLL void               Abc_NtkDeleteObjPo( Abc_Obj_t * pObj );
 extern ABC_DLL void               Abc_NtkDeleteObj_rec( Abc_Obj_t * pObj, int fOnlyNodes );
 extern ABC_DLL void               Abc_NtkDeleteAll_rec( Abc_Obj_t * pObj );
 extern ABC_DLL Abc_Obj_t *        Abc_NtkDupObj( Abc_Ntk_t * pNtkNew, Abc_Obj_t * pObj, int fCopyName );

src/base/abc/abcNtk.c

@@ -1538,7 +1538,8 @@ void Abc_NtkMakeSeq( Abc_Ntk_t * pNtk, int nLatchesToAdd )
 Abc_Ntk_t * Abc_NtkMakeOnePo( Abc_Ntk_t * pNtkInit, int Output, int nRange )
 {
     Abc_Ntk_t * pNtk;
-    Vec_Ptr_t * vPosToRemove;
+    Vec_Ptr_t * vPosLeft;
+    Vec_Ptr_t * vCosLeft;
     Abc_Obj_t * pNodePo;
     int i;
     assert( !Abc_NtkIsNetlist(pNtkInit) );
@@ -1556,17 +1557,22 @@ Abc_Ntk_t * Abc_NtkMakeOnePo( Abc_Ntk_t * pNtkInit, int Output, int nRange )
     if ( nRange < 1 )
         nRange = 1;
 
-    // collect POs to remove
-    vPosToRemove = Vec_PtrAlloc( 100 );
+    // filter POs
+    vPosLeft = Vec_PtrAlloc( nRange );
     Abc_NtkForEachPo( pNtk, pNodePo, i )
         if ( i < Output || i >= Output + nRange )
-            Vec_PtrPush( vPosToRemove, pNodePo );
-
-    // remove the POs
-    Vec_PtrForEachEntry( Abc_Obj_t *, vPosToRemove, pNodePo, i )
-        Abc_NtkDeleteObj( pNodePo );
-    Vec_PtrFree( vPosToRemove );
-
+            Abc_NtkDeleteObjPo( pNodePo );
+        else
+            Vec_PtrPush( vPosLeft, pNodePo );
+    // filter COs
+    vCosLeft = Vec_PtrDup( vPosLeft );
+    for ( i = Abc_NtkPoNum(pNtk); i < Abc_NtkCoNum(pNtk); i++ )
+        Vec_PtrPush( vCosLeft, Abc_NtkCo(pNtk, i) );
+    // update arrays
+    Vec_PtrFree( pNtk->vPos );  pNtk->vPos = vPosLeft;
+    Vec_PtrFree( pNtk->vCos );  pNtk->vCos = vCosLeft;
+
+    // clean the network
     if ( Abc_NtkIsStrash(pNtk) )
     {
         Abc_AigCleanup( (Abc_Aig_t *)pNtk->pManFunc );

src/base/abc/abcObj.c

@@ -230,6 +230,35 @@ void Abc_NtkDeleteObj( Abc_Obj_t * pObj )
 
 /**Function*************************************************************
 
+  Synopsis    [Deletes the PO from the network.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Abc_NtkDeleteObjPo( Abc_Obj_t * pObj )
+{
+    assert( Abc_ObjIsPo(pObj) );
+    // remove from the table of names
+    if ( Nm_ManFindNameById(pObj->pNtk->pManName, pObj->Id) )
+        Nm_ManDeleteIdName(pObj->pNtk->pManName, pObj->Id);
+    // delete fanins
+    Abc_ObjDeleteFanin( pObj, Abc_ObjFanin0(pObj) );
+    // remove from the list of objects
+    Vec_PtrWriteEntry( pObj->pNtk->vObjs, pObj->Id, NULL );
+    pObj->Id = (1<<26)-1;
+    pObj->pNtk->nObjCounts[pObj->Type]--;
+    pObj->pNtk->nObjs--;
+    // recycle the object memory
+    Abc_ObjRecycle( pObj );
+}
+
+
+/**Function*************************************************************
+
   Synopsis    [Deletes the node and MFFC of the node.]
 
   Description []