#start:passes in a useful order:
#end:This converts memories to word-wide DFFs and address decoders
opt_mem
opt_mem_priority
opt_mem_feedback
memory_bmux2rom
memory_dff
opt_clean
memory_share
opt_mem_widen
memory_memx                         (when called with -memx)
opt_clean
memory_collect
memory_bram -rules <bram_rules>     (when called with -bram)
memory_map                          (skipped if called with -nomap)
