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Patches i'm working on for 28778 and 29156


Dan Jacobowitz wanted to see the patches i'm working on to fix these two bugs.
I've attached them.

The work still left includes:

1. Use TBAA to prune sets for directly dereferenced variables in
find_what_p_points_to.
2. Create one NONLOCAL variable per type, and put them all in escaped
vars (type pruning will then ensure the right ones get picked).
3. Fix whatever regressions it is still causing (I fixed two this
morning, i think there are no C regressions let).

The combination of 1 and 2 should actually enable us to remove all the
SMT_USED_ALONE stuff I think, but that would wait for 4.3 anyway.

--Dan

PS I'm working on figuring out why it decides my attachment is
application/octet-stream

Attachment: escapedfordrow.diff
Description: Binary data


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