private int PatchPriorBeginOld(CFGBlock endBlock, int endOldIndex, out CFGBlock beginBlock)
{
for (int i = this == endBlock ? endOldIndex - 2 : Count - 1; i >= 0; i--)
{
int endOldI;
if (IsBeginOld(i, out endOldI))
{
this.overridingLabels [i] = BeginOldMask | (uint)endOldIndex;
beginBlock = this;
Subroutine.AddInferredOldMap(this.Index, i, endBlock, default(TypeNode));
return(i);
}
}
IEnumerator <CFGBlock> enumerator = Subroutine.PredecessorBlocks(this).GetEnumerator();
if (!enumerator.MoveNext())
{
throw new InvalidOperationException("missing begin_old");
}
int result = PatchPriorBeginOld(endBlock, endOldIndex, enumerator.Current, out beginBlock);
enumerator.MoveNext();
return(result);
}
