So now files and traversals contain several nested structs:
file <-- lfsr_file_t
file.o <-- lfsr_obshrub_t
file.o.o <-- lfsr_omdir_t
This gets a bit ugly, but it's really the only way to make the compiler
happy when also with C's annoying strict aliasing rules.
This also makes lfsr_traversal_t a simple alias of lfsr_mtraversal_t,
with lfsr_mtraversal_t now including all of the obshrub/omdir state.
This simplifies things internally, and allows lfsr_mtree_gc to assert on
opened-list enrollment, but risks increased stack cost for all of the
unused fields.
Fortunately this stack cost turned out to not be that significant:
code stack
before: 35264 2680 (+0.0%)
after: 35256 (-0.0%) 2688 (+0.3%)
Christopher Haster
c316270ebb