So I compiled the User Guide example with `-O0 -fspec-constr` to isolate the effects of call-pattern specialization, and nothing else (I used ghc-core to pretty-print the resulting Core syntax).
It appears I get the same output wether I use `-fspec-constr` or not.
Does this mean that compiling with `-O0` even explicitly enabled optimizations are turned off?
If that is the case, how does one test an isolated optimization?
-Chris