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Bug fix in sweep (which happens to be a rare bug in Abc_NodeMinimumBase) (additional fix).

This commit is contained in:
Alan Mishchenko 2021-11-27 17:12:08 -08:00
parent 079a309a0d
commit b10f6bd899
1 changed files with 6 additions and 0 deletions
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6
src/base/abc/abcMinBase.c
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@ -113,6 +113,7 @@ int Abc_NodeMinimumBase( Abc_Obj_t * pNode )
DdNode * bTemp, ** pbVars;
Vec_Str_t * vSupport;
int i, nVars, j, iFanin, iFanin2, k = 0;
int fDupFanins = 0;
assert( Abc_NtkIsBddLogic(pNode->pNtk) );
assert( Abc_ObjIsNode(pNode) );
@ -140,6 +141,7 @@ int Abc_NodeMinimumBase( Abc_Obj_t * pNode )
Vec_IntForEachEntryStop( &pNode->vFanins, iFanin2, j, k )
if ( iFanin == iFanin2 )
break;
fDupFanins |= (int)(j < k);
if ( j == k )
Vec_IntWriteEntry( &pNode->vFanins, k++, iFanin );
else if ( !Vec_IntRemove( &pFanin->vFanouts, pNode->Id ) )
@ -153,6 +155,10 @@ int Abc_NodeMinimumBase( Abc_Obj_t * pNode )
Cudd_RecursiveDeref( dd, bTemp );
Vec_StrFree( vSupport );
ABC_FREE( pbVars );
// try again if node had duplicated fanins
if ( fDupFanins )
Abc_NodeMinimumBase( pNode );
return 1;
}