1 files changed, 10 insertions, 4 deletions
diff --git a/src/base/abci/abc.c b/src/base/abci/abc.c
index b7f0517e..411f66ed 100644
--- a/src/base/abci/abc.c
+++ b/src/base/abci/abc.c
@@ -3355,6 +3355,7 @@ int Abc_CommandCollapse( Abc_Frame_t * pAbc, int argc, char ** argv )
     int fDualRail;
     int fReorder;
     int fReverse;
+    int fDumpOrder;
     int c;
     char * pLogFileName = NULL;
     pNtk = Abc_FrameReadNtk(pAbc);
@@ -3364,9 +3365,10 @@ int Abc_CommandCollapse( Abc_Frame_t * pAbc, int argc, char ** argv )
     fReorder = 1;
     fReverse = 0;
     fDualRail = 0;
+    fDumpOrder = 0;
     fBddSizeMax = ABC_INFINITY;
     Extra_UtilGetoptReset();
-    while ( ( c = Extra_UtilGetopt( argc, argv, "BLrodvh" ) ) != EOF )
+    while ( ( c = Extra_UtilGetopt( argc, argv, "BLrodxvh" ) ) != EOF )
     {
         switch ( c )
         {
@@ -3399,6 +3401,9 @@ int Abc_CommandCollapse( Abc_Frame_t * pAbc, int argc, char ** argv )
         case 'd':
             fDualRail ^= 1;
             break;
+        case 'x':
+            fDumpOrder ^= 1;
+            break;
         case 'v':
             fVerbose ^= 1;
             break;
@@ -3423,11 +3428,11 @@ int Abc_CommandCollapse( Abc_Frame_t * pAbc, int argc, char ** argv )
 
     // get the new network
     if ( Abc_NtkIsStrash(pNtk) )
-        pNtkRes = Abc_NtkCollapse( pNtk, fBddSizeMax, fDualRail, fReorder, fReverse, fVerbose );
+        pNtkRes = Abc_NtkCollapse( pNtk, fBddSizeMax, fDualRail, fReorder, fReverse, fDumpOrder, fVerbose );
     else
     {
         pNtk = Abc_NtkStrash( pNtk, 0, 0, 0 );
-        pNtkRes = Abc_NtkCollapse( pNtk, fBddSizeMax, fDualRail, fReorder, fReverse, fVerbose );
+        pNtkRes = Abc_NtkCollapse( pNtk, fBddSizeMax, fDualRail, fReorder, fReverse, fDumpOrder, fVerbose );
         Abc_NtkDelete( pNtk );
     }
     if ( pNtkRes == NULL )
@@ -3450,13 +3455,14 @@ int Abc_CommandCollapse( Abc_Frame_t * pAbc, int argc, char ** argv )
     return 0;
 
 usage:
-    Abc_Print( -2, "usage: collapse [-B <num>] [-L file] [-rodvh]\n" );
+    Abc_Print( -2, "usage: collapse [-B <num>] [-L file] [-rodxvh]\n" );
     Abc_Print( -2, "\t          collapses the network by constructing global BDDs\n" );
     Abc_Print( -2, "\t-B <num>: limit on live BDD nodes during collapsing [default = %d]\n", fBddSizeMax );
     Abc_Print( -2, "\t-L file : the log file name [default = %s]\n",  pLogFileName ? pLogFileName : "no logging" );
     Abc_Print( -2, "\t-r      : toggles dynamic variable reordering [default = %s]\n", fReorder? "yes": "no" );
     Abc_Print( -2, "\t-o      : toggles reverse variable ordering [default = %s]\n", fReverse? "yes": "no" );
     Abc_Print( -2, "\t-d      : toggles dual-rail collapsing mode [default = %s]\n", fDualRail? "yes": "no" );
+    Abc_Print( -2, "\t-x      : toggles dumping file \"order.txt\" with variable order [default = %s]\n", fDumpOrder? "yes": "no" );
     Abc_Print( -2, "\t-v      : print verbose information [default = %s]\n", fVerbose? "yes": "no" );
     Abc_Print( -2, "\t-h      : print the command usage\n");
     return 1;