private void BinaryShiftExpression(BinaryExpression binaryExpression)
{
binaryExpression.Left.Accept(this);
binaryExpression.Right.Accept(this);
int bits = Marshal.SizeOf(binaryExpression.Left.Type) * 8;
ILUtil.EmitConstant(_il, bits - 1);
_il.Emit(OpCodes.And);
switch (binaryExpression.ExpressionType)
{
case ExpressionType.ShiftLeft:
_il.Emit(OpCodes.Shl);
break;
case ExpressionType.ShiftRight:
if (TypeUtil.IsUnsigned(binaryExpression.Left.Type))
{
_il.Emit(OpCodes.Shr_Un);
}
else
{
_il.Emit(OpCodes.Shr);
}
break;
default:
throw new InvalidOperationException();
}
}
public void VariableAccess(VariableAccess variableAccess)
{
_il.Emit(OpCodes.Ldarg_0);
ILUtil.EmitConstant(_il, variableAccess.ParameterIndex);
_il.Emit(OpCodes.Ldelem_Ref);
_compiler.ExtendedConvertToType(typeof(object), variableAccess.Type, false);
}
public void UnaryExpression(UnaryExpression unaryExpression)
{
switch (unaryExpression.ExpressionType)
{
case ExpressionType.Minus:
unaryExpression.Operand.Accept(this);
_il.Emit(OpCodes.Neg);
break;
case ExpressionType.Not:
unaryExpression.Operand.Accept(this);
if (TypeUtil.IsInteger(unaryExpression.Operand.Type))
{
_il.Emit(OpCodes.Not);
}
else
{
ILUtil.EmitConstant(_il, 0);
_il.Emit(OpCodes.Ceq);
}
break;
case ExpressionType.LogicalNot:
unaryExpression.Operand.Accept(this);
ILUtil.EmitConstant(_il, 0);
_il.Emit(OpCodes.Ceq);
break;
case ExpressionType.BitwiseNot:
unaryExpression.Operand.Accept(this);
_il.Emit(OpCodes.Not);
break;
case ExpressionType.Plus:
case ExpressionType.Group:
// No-ops.
unaryExpression.Operand.Accept(this);
break;
default:
throw new NotSupportedException();
}
}
public void Constant(Constant constant)
{
if (constant.Value == null)
{
ILUtil.EmitNull(_il);
}
else if (constant.Value is DateTime)
{
ILUtil.EmitConstant(_il, ((DateTime)constant.Value).Ticks);
ILUtil.EmitNew(_il, typeof(DateTime).GetConstructor(new[] { typeof(long) }));
}
else if (constant.Value is TimeSpan)
{
ILUtil.EmitConstant(_il, ((TimeSpan)constant.Value).Ticks);
ILUtil.EmitNew(_il, typeof(TimeSpan).GetConstructor(new[] { typeof(long) }));
}
else
{
ILUtil.EmitConstant(_il, constant.Value);
}
}
private void BinaryLogicalExpression(BinaryExpression binaryExpression)
{
Label beforeLabel;
Label afterLabel;
switch (binaryExpression.ExpressionType)
{
case ExpressionType.And:
case ExpressionType.LogicalAnd:
beforeLabel = _il.DefineLabel();
afterLabel = _il.DefineLabel();
binaryExpression.Left.Accept(this);
_il.Emit(OpCodes.Brfalse, beforeLabel);
binaryExpression.Right.Accept(this);
_il.Emit(OpCodes.Br, afterLabel);
_il.MarkLabel(beforeLabel);
ILUtil.EmitConstant(_il, 0);
_il.MarkLabel(afterLabel);
break;
case ExpressionType.AndBoth:
binaryExpression.Left.Accept(this);
binaryExpression.Right.Accept(this);
_il.Emit(OpCodes.And);
break;
case ExpressionType.Or:
case ExpressionType.LogicalOr:
beforeLabel = _il.DefineLabel();
afterLabel = _il.DefineLabel();
binaryExpression.Left.Accept(this);
_il.Emit(OpCodes.Brtrue, beforeLabel);
binaryExpression.Right.Accept(this);
_il.Emit(OpCodes.Br, afterLabel);
_il.MarkLabel(beforeLabel);
ILUtil.EmitConstant(_il, 1);
_il.MarkLabel(afterLabel);
break;
case ExpressionType.OrBoth:
binaryExpression.Left.Accept(this);
binaryExpression.Right.Accept(this);
_il.Emit(OpCodes.Or);
break;
case ExpressionType.Xor:
binaryExpression.Left.Accept(this);
binaryExpression.Right.Accept(this);
_il.Emit(OpCodes.Xor);
break;
default:
throw new InvalidOperationException();
}
}
