Net Framework Expression compiler generates perfromanter Code for isNull check

[jogibear9988]

If You have a IfThen expression with a check for "null" net frameworks expression compiler generates better Code!

Problem is, we could not change this in TryEmitComparison, because we need to branch over the rest of the code.

Need to look how we can do.

[jogibear9988]

left code => null check from fast expression compiler
right => from net framework

[jogibear9988]

@dadhi here I also need some Ideas, how we can do the check in TryEmitComparison, but the branch is outside...

[dadhi]

Probably we may enhance the parent passed through TryEmit. Instead of just an ExpressionType, we may combine more info into struct, and pass it by ref.
Will it be enough?

[jogibear9988]

At this point I don't think this would help. Because the inner Function (TryEmitComparison) needs to tell the outer that it used a inverted comparison. Or should the whole comparison be generated in another way?

[jogibear9988]

Maybe I look if I add a function wich only generates a short comparison. Then I'll use it if possible ...

[jogibear9988]

I've fixed it, don't know if its a good way: be8ab06