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NH-4049 - Remove unused EmitUtil members. #660

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Merged
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Jul 14, 2017
Merged

NH-4049 - Remove unused EmitUtil members. #660

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156 changes: 17 additions & 139 deletions src/NHibernate/Bytecode/EmitUtil.cs
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Original file line number Diff line number Diff line change
@@ -1,67 +1,10 @@
using System;
using System.Reflection;
using System.Reflection.Emit;
using System.Collections.Generic;
using NHibernate.Linq;
using NHibernate.Util;

namespace NHibernate.Bytecode
{
public class EmitUtil
internal static class EmitUtil
{
private EmitUtil()
{
}

/// <summary>
/// Emits an <c>ldc.i4</c> opcode using the fastest available opcode choice.
/// </summary>
public static void EmitFastInt(ILGenerator il, int value)
{
switch (value)
{
case -1:
il.Emit(OpCodes.Ldc_I4_M1);
return;
case 0:
il.Emit(OpCodes.Ldc_I4_0);
return;
case 1:
il.Emit(OpCodes.Ldc_I4_1);
return;
case 2:
il.Emit(OpCodes.Ldc_I4_2);
return;
case 3:
il.Emit(OpCodes.Ldc_I4_3);
return;
case 4:
il.Emit(OpCodes.Ldc_I4_4);
return;
case 5:
il.Emit(OpCodes.Ldc_I4_5);
return;
case 6:
il.Emit(OpCodes.Ldc_I4_6);
return;
case 7:
il.Emit(OpCodes.Ldc_I4_7);
return;
case 8:
il.Emit(OpCodes.Ldc_I4_8);
return;
}

if (value > -129 && value < 128)
{
il.Emit(OpCodes.Ldc_I4_S, (SByte) value);
}
else
{
il.Emit(OpCodes.Ldc_I4, value);
}
}

public static void EmitBoxIfNeeded(ILGenerator il, System.Type type)
{
if (type.IsValueType)
Expand All @@ -70,29 +13,25 @@ public static void EmitBoxIfNeeded(ILGenerator il, System.Type type)
}
}

private static Dictionary<System.Type, OpCode> typeToOpcode;
private static readonly Dictionary<System.Type, OpCode> typeToOpcode;

static EmitUtil()
{
typeToOpcode = new Dictionary<System.Type, OpCode>(12);

typeToOpcode[typeof(bool)] = OpCodes.Ldind_I1;
typeToOpcode[typeof(sbyte)] = OpCodes.Ldind_I1;
typeToOpcode[typeof(byte)] = OpCodes.Ldind_U1;

typeToOpcode[typeof(char)] = OpCodes.Ldind_U2;
typeToOpcode[typeof(short)] = OpCodes.Ldind_I2;
typeToOpcode[typeof(ushort)] = OpCodes.Ldind_U2;

typeToOpcode[typeof(int)] = OpCodes.Ldind_I4;
typeToOpcode[typeof(uint)] = OpCodes.Ldind_U4;

typeToOpcode[typeof(long)] = OpCodes.Ldind_I8;
typeToOpcode[typeof(ulong)] = OpCodes.Ldind_I8;

typeToOpcode[typeof(float)] = OpCodes.Ldind_R4;

typeToOpcode[typeof(double)] = OpCodes.Ldind_R8;
typeToOpcode = new Dictionary<System.Type, OpCode>
{
{typeof(bool), OpCodes.Ldind_I1},
{typeof(sbyte), OpCodes.Ldind_I1},
{typeof(byte), OpCodes.Ldind_U1},
{typeof(char), OpCodes.Ldind_U2},
{typeof(short), OpCodes.Ldind_I2},
{typeof(ushort), OpCodes.Ldind_U2},
{typeof(int), OpCodes.Ldind_I4},
{typeof(uint), OpCodes.Ldind_U4},
{typeof(long), OpCodes.Ldind_I8},
{typeof(ulong), OpCodes.Ldind_I8},
{typeof(float), OpCodes.Ldind_R4},
{typeof(double), OpCodes.Ldind_R8},
};
}

/// <summary>
Expand Down Expand Up @@ -146,66 +85,5 @@ public static void PreparePropertyForSet(ILGenerator il, System.Type propertyTyp
}
}
}

/// <summary>
/// Defines a new delegate type.
/// </summary>
public static System.Type DefineDelegateType(
string fullTypeName,
ModuleBuilder moduleBuilder,
System.Type returnType,
System.Type[] parameterTypes)
{
TypeBuilder delegateBuilder =
moduleBuilder.DefineType(
fullTypeName,
TypeAttributes.Class | TypeAttributes.Public | TypeAttributes.Sealed | TypeAttributes.AnsiClass |
TypeAttributes.AutoClass, typeof(MulticastDelegate));

// Define a special constructor
ConstructorBuilder constructorBuilder =
delegateBuilder.DefineConstructor(
MethodAttributes.RTSpecialName | MethodAttributes.HideBySig | MethodAttributes.Public,
CallingConventions.Standard, new System.Type[] {typeof(object), typeof(IntPtr)});

constructorBuilder.SetImplementationFlags(
MethodImplAttributes.Runtime | MethodImplAttributes.Managed);

// Define the Invoke method for the delegate

MethodBuilder methodBuilder = delegateBuilder.DefineMethod("Invoke",
MethodAttributes.Public | MethodAttributes.HideBySig
| MethodAttributes.NewSlot | MethodAttributes.Virtual,
returnType, parameterTypes);

methodBuilder.SetImplementationFlags(
MethodImplAttributes.Runtime | MethodImplAttributes.Managed);

return delegateBuilder.CreateType();
}

public static void EmitLoadType(ILGenerator il, System.Type type)
{
il.Emit(OpCodes.Ldtoken, type);
il.Emit(OpCodes.Call, ReflectionCache.TypeMethods.GetTypeFromHandle);
}

public static void EmitLoadMethodInfo(ILGenerator il, MethodInfo methodInfo)
{
il.Emit(OpCodes.Ldtoken, methodInfo);
il.Emit(OpCodes.Call, ReflectionCache.MethodBaseMethods.GetMethodFromHandle);
il.Emit(OpCodes.Castclass, typeof(MethodInfo));
}

private static readonly MethodInfo CreateDelegate = ReflectHelper.GetMethod(
() => Delegate.CreateDelegate(null, null));

public static void EmitCreateDelegateInstance(ILGenerator il, System.Type delegateType, MethodInfo methodInfo)
{
EmitLoadType(il, delegateType);
EmitLoadMethodInfo(il, methodInfo);
il.EmitCall(OpCodes.Call, CreateDelegate, null);
il.Emit(OpCodes.Castclass, delegateType);
}
}
}