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* config/bfin/bfin.c (struct loop_info): New members block_bitmap and bad. (struct loop_work and related VEC declarations): Delete. (bfin_dump_loops): Print out new member bad. (bfin_bb_in_loop): Use plain bitmap test. Don't recurse. (bfin_scan_loop): Don't recurse. (bfin_optimize_loop): Don't use a loop depth of -1 to indicate bad loops. No longer need to update outer loops if the current one is found bad. Move some validitiy checks to bfin_discover_loop. (bfin_discover_loop): New function, mostly split from bfin_reorg_loops, but changed not to check for nesting. Also changed to use the new bad flag. (bfin_reorg_loops): Use bfin_discover_loop to find single loops one at a time. Use bitmap based test to discover loop nesting. From-SVN: r116972
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