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-rw-r--r--src/aig/ivy/ivyBalance.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/aig/ivy/ivyBalance.c b/src/aig/ivy/ivyBalance.c
index 2d001f8c..6eba318c 100644
--- a/src/aig/ivy/ivyBalance.c
+++ b/src/aig/ivy/ivyBalance.c
@@ -103,6 +103,11 @@ int Ivy_NodeCompareLevelsDecrease( Ivy_Obj_t ** pp1, Ivy_Obj_t ** pp2 )
return -1;
if ( Diff < 0 )
return 1;
+ Diff = Ivy_Regular(*pp1)->Id - Ivy_Regular(*pp2)->Id;
+ if ( Diff > 0 )
+ return -1;
+ if ( Diff < 0 )
+ return 1;
return 0;
}