* Further cleanup.
* Further cleanup.

* Test for whether bits are shifted out during the optzn.

If so, the fold is illegal, though it can be handled explicitly for setne/seteq

This fixes the miscompilation of 254.gap last night, which was a latent bug
exposed by other optimizer improvements.


git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@15085 91177308-0d34-0410-b5e6-96231b3b80d8

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