private void MarkOptimizationAndCaseBlocks(InstructionBlock block, RemoveCompilerOptimizationsStep.SwitchData data)
 {
     V_0 = new Queue <InstructionBlock>();
     V_1 = new HashSet <int>();
     V_2 = block.get_Successors();
     V_3 = 0;
     while (V_3 < (int)V_2.Length)
     {
         V_0.Enqueue(V_2[V_3]);
         V_3 = V_3 + 1;
     }
     while (V_0.get_Count() > 0)
     {
         V_5       = V_0.Dequeue();
         dummyVar0 = V_1.Add(V_5.get_First().get_Offset());
         if (!this.IsOptimizationBlock(this.blockExpressions.get_Item(V_5.get_First().get_Offset()), data.get_OptimizationVariable()))
         {
             if (!this.IsCaseBlock(this.blockExpressions.get_Item(V_5.get_First().get_Offset()), data.get_SwitchExpression()) && !this.IsNullCaseBlock(this.blockExpressions.get_Item(V_5.get_First().get_Offset()), data.get_SwitchExpression()))
             {
                 continue;
             }
             this.switchBlocksToCasesMap.get_Item(block.get_First().get_Offset()).Add(V_5.get_First().get_Offset());
             V_8 = V_5.get_Successors()[1];
             if (this.IsEmptyStringCaseBlock(this.blockExpressions.get_Item(V_8.get_First().get_Offset()), data.get_SwitchExpression()))
             {
                 V_5.set_Last(V_8.get_Last());
                 V_5.set_Successors(V_8.get_Successors());
                 V_9 = this.blockExpressions.get_Item(V_5.get_First().get_Offset()).get_Item(0) as BinaryExpression;
                 V_9.set_Right(new LiteralExpression("", this.methodContext.get_Method().get_Module().get_TypeSystem(), null));
                 V_10 = this.blockExpressions.get_Item(V_8.get_First().get_Offset()).get_Item(0).get_UnderlyingSameMethodInstructions();
                 V_9  = V_9.CloneAndAttachInstructions(V_10) as BinaryExpression;
                 this.blockExpressions.get_Item(V_5.get_First().get_Offset()).set_Item(0, new UnaryExpression(11, V_9, null));
                 this.blocksToBeRemoved.Add(V_8.get_First().get_Offset());
             }
             dummyVar1 = this.MarkSecondSuccessorForRemovalIfItIsUnconditionalJump(V_5);
         }
         else
         {
             V_6 = V_5.get_Successors()[0];
             if (!V_1.Contains(V_6.get_First().get_Offset()))
             {
                 V_0.Enqueue(V_6);
             }
             V_7 = this.MarkSecondSuccessorForRemovalIfItIsUnconditionalJump(V_5);
             if (!V_1.Contains(V_7.get_First().get_Offset()) && this.IsOptimizationBlock(this.blockExpressions.get_Item(V_5.get_First().get_Offset()), data.get_OptimizationVariable()))
             {
                 V_0.Enqueue(V_7);
             }
             this.blocksToBeRemoved.Add(V_5.get_First().get_Offset());
         }
     }
     return;
 }