On Mon, Sep 28, 2015 at 7:59 AM, Sylvain G <[email protected]> wrote: > Hi, > > I'm trying to modify V8's Crankshaft for a research project. > > So far I'm duplicating some parts of code at the Hydrogen level (mostly > loops), and modifying them with different optimizations than the usual > Crankshaft is doing. I still need the original version of the code as a > fallback in case something goes wrong (don't want to deoptimize everytime my > modifications fail). > > My basic idea was to save/overwrite the right stackframe to restore the > state after taking the modified branch. It doesn't work because because the > newly created variables in the duplicated code do not correspond with the > original ones. > > So here is my question: My modifications are sparse so I can handle them > manually, but how to automatically match all the other variables? > how can I ensure that both branches in the CFG (my version and the original) > use the same stack slots and same registers for the corresponding variables? > > Or is there a better way to do this kind of thing at all? > > Any explanation/suggestion would be very welcome. > Thanks, > Sylvain
I think that's going to be hard. If I understand your question right, you are essentially asking "how can I make two different programs do the same thing?" -- -- v8-dev mailing list [email protected] http://groups.google.com/group/v8-dev --- You received this message because you are subscribed to the Google Groups "v8-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
