private void EmitRangeCheckedBranch(ConstantValue startConstant, ConstantValue endConstant, object targetLabel) { _builder.EmitLoad(_key); // Normalize the key to 0 if needed // Emit: ldc constant // sub if (!startConstant.IsDefaultValue) { _builder.EmitConstantValue(startConstant); _builder.EmitOpCode(ILOpCode.Sub); } if (_keyTypeCode.Is64BitIntegral()) { _builder.EmitLongConstant(endConstant.Int64Value - startConstant.Int64Value); } else { _builder.EmitIntConstant(endConstant.Int32Value - startConstant.Int32Value); } _builder.EmitBranch(ILOpCode.Ble_un, targetLabel, ILOpCode.Bgt_un); }
private void EmitRangeCheckedBranch( ConstantValue startConstant, ConstantValue endConstant, object targetLabel ) { _builder.EmitLoad(_key); // Normalize the key to 0 if needed // Emit: ldc constant // sub if (!startConstant.IsDefaultValue) { _builder.EmitConstantValue(startConstant); _builder.EmitOpCode(ILOpCode.Sub); } if (_keyTypeCode.Is64BitIntegral()) { _builder.EmitLongConstant(endConstant.Int64Value - startConstant.Int64Value); } else { int Int32Value(ConstantValue value) { // ConstantValue does not correctly convert byte and ushort values to int. // It sign extends them rather than padding them. We compensate for that here. // See also https://github.com/dotnet/roslyn/issues/18579 switch (value.Discriminator) { case ConstantValueTypeDiscriminator.Byte: return(value.ByteValue); case ConstantValueTypeDiscriminator.UInt16: return(value.UInt16Value); default: return(value.Int32Value); } } _builder.EmitIntConstant(Int32Value(endConstant) - Int32Value(startConstant)); } _builder.EmitBranch(ILOpCode.Ble_un, targetLabel, ILOpCode.Bgt_un); }