private static bool IsOpCodeSettingOutputParameterToDefaultValue(Instruction instruction)
{
if (instruction.Next.IsStindI()
&& instruction.IsLdcI()
&& instruction.GetLongValue() == 0L)
{
return true;
}
if (instruction.IsStindI()
&& instruction.Previous.IsLdcI()
&& instruction.Previous.GetLongValue() == 0L)
{
return true;
}
if (instruction.Next.IsStindR()
&& instruction.IsLdcR()
// ReSharper disable CompareOfFloatsByEqualityOperator
&& instruction.GetLongValue() == 0D)
// ReSharper restore CompareOfFloatsByEqualityOperator
{
return true;
}
if (instruction.IsStindR()
&& instruction.Previous.IsLdcR()
// ReSharper disable CompareOfFloatsByEqualityOperator
&& instruction.Previous.GetLongValue() == 0D)
// ReSharper restore CompareOfFloatsByEqualityOperator
{
return true;
}
if (instruction.OpCode == OpCodes.Ldnull
&& instruction.Next.OpCode == OpCodes.Stind_Ref)
{
return true;
}
if (instruction.Next.OpCode == OpCodes.Ldnull
&& instruction.Next.Next.OpCode == OpCodes.Stind_Ref)
{
return true;
}
if (instruction.OpCode == OpCodes.Stind_Ref
&& instruction.Previous.OpCode == OpCodes.Ldnull)
{
return true;
}
return false;
}
private static bool IsOpCodeSettingLocalVariableToDefaultValue(Instruction instruction)
{
if (instruction.Next.OpCode == OpCodes.Stloc
&& instruction.IsLdcI()
&& instruction.GetLongValue() == 0L)
{
return true;
}
if (instruction.OpCode == OpCodes.Stloc
&& instruction.Previous.IsLdcI()
&& instruction.Previous.GetLongValue() == 0L)
{
return true;
}
if (instruction.Next.OpCode == OpCodes.Stloc
&& instruction.IsLdcR()
// ReSharper disable CompareOfFloatsByEqualityOperator
&& instruction.GetDoubleValue() == 0D)
// ReSharper restore CompareOfFloatsByEqualityOperator
{
return true;
}
if (instruction.OpCode == OpCodes.Stloc
&& instruction.Previous.IsLdcR()
// ReSharper disable CompareOfFloatsByEqualityOperator
&& instruction.Previous.GetDoubleValue() == 0D)
// ReSharper restore CompareOfFloatsByEqualityOperator
{
return true;
}
if (instruction.OpCode == OpCodes.Stobj
&& instruction.Previous.OpCode == OpCodes.Ldnull
&& instruction.Previous.Previous.OpCode == OpCodes.Ldloca)
{
return true;
}
return false;
}