Bug fix in &nf.

src/aig/gia/giaNf.c

@@ -808,6 +808,7 @@ static inline int Nf_ManPrepareCuts( Nf_Cut_t * pCuts, Nf_Man_t * p, int iObj, i
             pMfCut->iFunc   = Nf_CutFunc( pCut );
             pMfCut->nLeaves = Nf_CutSize( pCut );
             pMfCut->Sign    = Nf_CutGetSign( pCut+1, Nf_CutSize(pCut) );
+            pMfCut->Useless = Nf_ObjCutUseless( p, Abc_Lit2Var(pMfCut->iFunc) );
             memcpy( pMfCut->pLeaves, pCut+1, sizeof(int) * Nf_CutSize(pCut) );
             pMfCut++;
         }

src/base/abci/abc.c

@@ -33382,17 +33382,17 @@ usage:
         sprintf(Buffer, "best possible" );
     else
         sprintf(Buffer, "%d", pPars->DelayTarget );
-    Abc_Print( -2, "usage: &nf [-KCFARLED num] [-akvwh]\n" );
+    Abc_Print( -2, "usage: &nf [-KCFRLED num] [-kvwh]\n" );
     Abc_Print( -2, "\t           performs technology mapping of the network\n" );
     Abc_Print( -2, "\t-K num   : LUT size for the mapping (2 <= K <= %d) [default = %d]\n", pPars->nLutSizeMax, pPars->nLutSize );
     Abc_Print( -2, "\t-C num   : the max number of priority cuts (1 <= C <= %d) [default = %d]\n", pPars->nCutNumMax, pPars->nCutNum );
     Abc_Print( -2, "\t-F num   : the number of area flow rounds [default = %d]\n", pPars->nRounds );
-    Abc_Print( -2, "\t-A num   : the number of exact area rounds [default = %d]\n", pPars->nRoundsEla );
+//    Abc_Print( -2, "\t-A num   : the number of exact area rounds [default = %d]\n", pPars->nRoundsEla );
     Abc_Print( -2, "\t-R num   : the delay relaxation ratio (num >= 0) [default = %d]\n", pPars->nRelaxRatio );
     Abc_Print( -2, "\t-L num   : the fanout limit for coarsening XOR/MUX (num >= 2) [default = %d]\n", pPars->nCoarseLimit );
     Abc_Print( -2, "\t-E num   : the area/edge tradeoff parameter (0 <= num <= 100) [default = %d]\n", pPars->nAreaTuner );
     Abc_Print( -2, "\t-D num   : sets the delay constraint for the mapping [default = %s]\n", Buffer );
-    Abc_Print( -2, "\t-a       : toggles area-oriented mapping [default = %s]\n", pPars->fAreaOnly? "yes": "no" );
+//    Abc_Print( -2, "\t-a       : toggles area-oriented mapping [default = %s]\n", pPars->fAreaOnly? "yes": "no" );
     Abc_Print( -2, "\t-k       : toggles coarsening the subject graph [default = %s]\n", pPars->fCoarsen? "yes": "no" );
     Abc_Print( -2, "\t-v       : toggles verbose output [default = %s]\n", pPars->fVerbose? "yes": "no" );
     Abc_Print( -2, "\t-w       : toggles very verbose output [default = %s]\n", pPars->fVeryVerbose? "yes": "no" );