IKVM.Internal.CodeEmitter.OptimizeBranchSizes C# (CSharp) Method

        private void OptimizeBranchSizes()
        {
            int offset = 0;
            for (int i = 0; i < code.Count; i++)
            {
                if (code[i].pseudo == CodeType.Label)
                {
                    code[i].Label.Temp = offset;
                }
                offset += code[i].Size;
            }
            offset = 0;
            for (int i = 0; i < code.Count; i++)
            {
                int prevOffset = offset;
                offset += code[i].Size;
                if (code[i].HasLabel && code[i].opcode.OperandType == OperandType.InlineBrTarget)
                {
                    CodeEmitterLabel label = code[i].Label;
                    int diff = label.Temp - (prevOffset + code[i].opcode.Size + 1);
                    if (-128 <= diff && diff <= 127)
                    {
                        OpCode opcode = code[i].opcode;
                        if (opcode == OpCodes.Brtrue)
                        {
                            opcode = OpCodes.Brtrue_S;
                        }
                        else if (opcode == OpCodes.Brfalse)
                        {
                            opcode = OpCodes.Brfalse_S;
                        }
                        else if (opcode == OpCodes.Br)
                        {
                            opcode = OpCodes.Br_S;
                        }
                        else if (opcode == OpCodes.Beq)
                        {
                            opcode = OpCodes.Beq_S;
                        }
                        else if (opcode == OpCodes.Bne_Un)
                        {
                            opcode = OpCodes.Bne_Un_S;
                        }
                        else if (opcode == OpCodes.Ble)
                        {
                            opcode = OpCodes.Ble_S;
                        }
                        else if (opcode == OpCodes.Ble_Un)
                        {
                            opcode = OpCodes.Ble_Un_S;
                        }
                        else if (opcode == OpCodes.Blt)
                        {
                            opcode = OpCodes.Blt_S;
                        }
                        else if (opcode == OpCodes.Blt_Un)
                        {
                            opcode = OpCodes.Blt_Un_S;
                        }
                        else if (opcode == OpCodes.Bge)
                        {
                            opcode = OpCodes.Bge_S;
                        }
                        else if (opcode == OpCodes.Bge_Un)
                        {
                            opcode = OpCodes.Bge_Un_S;
                        }
                        else if (opcode == OpCodes.Bgt)
                        {
                            opcode = OpCodes.Bgt_S;
                        }
                        else if (opcode == OpCodes.Bgt_Un)
                        {
                            opcode = OpCodes.Bgt_Un_S;
                        }
                        else if (opcode == OpCodes.Leave)
                        {
                            opcode = OpCodes.Leave_S;
                        }
                        code[i] = new OpCodeWrapper(opcode, label);
                    }
                }
            }
        }