[issue2506] Add mechanism to disable optimizations

[Ned Batchelder]

Ned Batchelder <ned at nedbatchelder.com> added the comment:

Folding constants won't affect control flow.  The important thing here is to disable optimizing away jumps to jumps.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue2506>
_______________________________________