[m-dev.] For review: special pred elimination test case

[David Glen JEFFERY]

> tests/hard_coded/elim_special_pred.m:
> tests/hard_coded/elim_special_pred.exp:
> 	Test case to make sure that special preds aren't eliminated
> 	too agressively - arg/3 makes use of the special preds possible
> 	in new ways - the old analysis in dead_proc_elim didn't get this
> 	right, so was modified to use a more conservative algorithm.
> 	This test is to make sure that future changes to that algorithm
> 	are not too agressive.
> 
> tests/hard_coded/Mmake:
> tests/hard_coded/.cvsignore:
> 	Turn the test on, we pass it at the moment.

Commit away.


love and cuddles,
dgj
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