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Fixing a rare problem with choice nodes.

This commit is contained in:
Alan Mishchenko 2021-12-16 21:31:09 +07:00
parent f1b64be840
commit 25b1a0d81c
1 changed files with 26 additions and 0 deletions
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26
src/aig/gia/giaAig.c
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@ -611,6 +611,27 @@ Gia_Man_t * Gia_ManCompress2( Gia_Man_t * p, int fUpdateLevel, int fVerbose )
SeeAlso []
***********************************************************************/
int Gia_ManTestChoices( Gia_Man_t * p )
{
Gia_Obj_t * pObj; int i;
Vec_Int_t * vPointed = Vec_IntStart( Gia_ManObjNum(p) );
Gia_ManForEachAnd( p, pObj, i )
if ( Gia_ObjSibl(p, i) )
Vec_IntWriteEntry( vPointed, Gia_ObjSibl(p, i), 1 );
Gia_ManCreateRefs( p );
Gia_ManForEachAnd( p, pObj, i )
if ( Vec_IntEntry(vPointed, i) && Gia_ObjRefNumId(p, i) > 0 )
{
printf( "Gia_ManCheckChoices: Member %d", i );
printf( " of a choice node has %d fanouts.\n", Gia_ObjRefNumId(p, i) );
ABC_FREE( p->pRefs );
Vec_IntFree( vPointed );
return 0;
}
ABC_FREE( p->pRefs );
Vec_IntFree( vPointed );
return 1;
}
Gia_Man_t * Gia_ManPerformDch( Gia_Man_t * p, void * pPars )
{
int fUseMapping = 0;
@ -628,6 +649,11 @@ Gia_Man_t * Gia_ManPerformDch( Gia_Man_t * p, void * pPars )
// pGia = Gia_ManFromAig( pNew );
pGia = Gia_ManFromAigChoices( pNew );
Aig_ManStop( pNew );
if ( !p->pManTime && !Gia_ManTestChoices(pGia) )
{
Gia_ManStop( pGia );
pGia = Gia_ManDup( p );
}
Gia_ManTransferTiming( pGia, p );
return pGia;
}