[tcb] Incremental SSA updates
Kazu Hirata
kazu@cs.umass.edu
Wed Mar 30 19:28:00 GMT 2005
Hi Jeff,
> What I think Kazu is proposing is the context sensitive equivalences
> would be made explicit in the IL. I would actually consider that a
> relatively minor cleanup. If done correctly (and that may be
> nontrivial), then I would expect such a change to have no
> significant impact on either the compile time performance of DOM or
> on the generated code.
Yes, that's what I am realizing. Too much IL manipulation isn't worth
it if it serves nothing but jump threading.
> The code attached to the jump threading meta-bug removes that limitation
> and results in a huge improvement in the number of jumps we are able
> to thread.
>
> [ I'll note that any data on the effectiveness of jump threading changes
> ought to be made relative to the patch attached to the jump
> threading meta-bug. ]
Yes, that's why I am keeping myself quiet as far as patches go. :-)
Kazu Hirata
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