Pull the BadPtr(RSP) checks from simplifyIRExpr to quickSimplify.
With a very high NR_PTRS, 10 seconds often isn't enough for FT2 to get
good coverage.  Extend those tests a bit.
Much better complex_hb test.
Rework vary_nr_ptrs so that it:

a) Has a sensible number of repetitions
b) Tests a sensible set of abscissae
c) Interleaves testing the with and without enforcer cases.
Fix up complex alias easy test.
Add in a (massively hacky) thing for manually adding edges which were
missed by BCG.
Fix a silly bug in the non-CONFIG_USE_CHILDREN build.  Still doesn't
work quite right, but since it's only a debug thing I don't actually
care all that much.