[TruffleDSL] Splitting and Cost of Generic Nodes

[Stefan Marr]

Hi Christian:

On 30 May 2014, at 22:39, Christian Humer <christian.humer at gmail.com> wrote:

> Unfortunately splitting has still some major issues (as you recognized). The current version splits way too much (independent of polymorphism) and can also have some exponential code duplication problems under bad conditions. However it should stabilize at some point (may be late). But this should only be a problem on bigger benchmarks not on micro-benchmarks. So maybe there is another issue here. Can you point me to such a micro?

Well, removing the condition (isMaxSingleCall) [see 1] solves all the issues for me. 
After that, I do not have any benchmark (I am aware of) that gives trouble with splitting enabled.
That’s why I am asking. To me, that condition just doesn’t seem very useful, and I would like to understand in which cases it might be useful.

> @Generic is the wrong name for this annotation. In the next iteration of the DSL this annotation is going to be renamed to @Fallback.

Ok, I see. Well, I did remove all uses of @Generic already, after I saw the consequence for splitting.

Thanks
Stefan


[1] https://github.com/smarr/graal/commit/caa1fc084623f4e6ae3087dec9da81ce859aa906


-- 
Stefan Marr
INRIA Lille - Nord Europe
http://stefan-marr.de/research/