This replaces the lfsr_mptr_t struct with simple arrays.
The main motivation for this is C99's strict aliasing. It saves a
decent amount of stack to reference the mdir's internal block array as
an mptr directly, but we were only able to accomplish this in
lfsr_mdir_mptr by violating C99's strict aliasing rules.
The main downside of this is C's wonderful array-to-pointer decay
resulting in more implicit references and chances for things to get
clobbered (the original motivation for lfsr_mptr_t was due to bugs
introduced this way).
If I know one thing about C99's strict aliasing it's that it sure loves
to make code less safe.
No significant code changes, which is probably a good thing:
code stack
default before: 36436 2672
default after: 36432 (-0.0%) 2672 (+0.0%)
ckfetches before: 36674 2704
ckfetches after: 36666 (-0.0%) 2704 (+0.0%)
Christopher Haster
2cefcbdddc