Zdenek Dvorak
35b0708052
* basic-block.h (EDGE_IRREDUCIBLE_LOOP, EDGE_ALL_FLAGS): New. * cfg.c (dump_edge_info): Add EDGE_IRREDUCIBLE_LOOP flag dump. * cfgloop.c (flow_loop_free): Made global. (establish_preds): New static function. (flow_loop_tree_node_add): Handle subloops of added loop correctly. (get_loop_exit_edges): New. (verify_loop_structure): Verify EDGE_IRREDUCIBLE_LOOP flags. * cfgloop.h (flow_loop_free, get_loop_exit_edges, unloop): Declare. * cfgloopanal.c (mark_irreducible_loops): Mark edges in irreducible loops. * cfgloopmanip.c (loop_delete_branch_edge): Allow to test for removability of an edge. (fix_irreducible_loops): New static function. (find_path, remove_path): Add ability to remove enclosing loops. (unloop): New. (copy_bbs, duplicate_loop_to_header_edge): Use EDGE_IRREDUCIBLE_LOOP flags. * cfgrtl.c (verify_flow_info): Handle EDGE_IRREDUCIBLE_LOOP flag. * loop-unroll.c (peel_loops_completely): Do not duplicate loop if not neccessary. (decide_peel_completely, peel_loops_completely): Allow complete peeling of non-duplicable once rolling loops. * loop-unswitch.c (unswitch_loop): Update EDGE_IRREDUCIBLE_LOOP flags. From-SVN: r63864
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