luke
/
abc
mirror of https://github.com/YosysHQ/abc.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Fix constant propagation after 'if'.

This commit is contained in:
Alan Mishchenko 2013-06-18 13:56:46 -07:00
parent 91f06107bf
commit a7339fdb99
1 changed files with 14 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
src/base/abc/abcUtil.c
View File

@ -964,6 +964,20 @@ int Abc_NtkLogicMakeSimpleCos( Abc_Ntk_t * pNtk, int fDuplicate )
assert( Abc_NtkIsLogic(pNtk) );
LevelMax = Abc_NtkLevel(pNtk);
// fix constant drivers
Abc_NtkForEachCo( pNtk, pNode, i )
{
pDriver = Abc_ObjFanin0(pNode);
if ( !Abc_NodeIsConst(pDriver) )
continue;
pDriverNew = (Abc_ObjFaninC0(pNode) == Abc_NodeIsConst0(pDriver)) ? Abc_NtkCreateNodeConst1(pNtk) : Abc_NtkCreateNodeConst0(pNtk);
if ( Abc_ObjFaninC0(pNode) )
Abc_ObjXorFaninC( pNode, 0 );
Abc_ObjPatchFanin( pNode, pDriver, pDriverNew );
if ( Abc_ObjFanoutNum(pDriver) == 0 )
Abc_NtkDeleteObj( pDriver );
}
// collect drivers pointed by complemented edges
vDrivers = Vec_PtrAlloc( 100 );
Abc_NtkIncrementTravId( pNtk );