Marking this one as closed.
Also, rejecting the various ways to disable peephole optimization.
This was discussed with Guido long ago and the decision essentially
recognized that for most practical purposes the output of the peepholer
is the generated code and no good would come from exposing upstream
intermediate steps.
Since then, I believe Neal got Guido's approval for either the -O or -
OO option to generate new optimizations that potentially change
semantics. In that situation, there is a worthwhile reason for the
enable/disable option.