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PR middle-end/54364 * bb-reorder.c (connect_better_edge_p): New added. (find_traces_1_round): When optimizing for size, ignore edge frequency and probability, and handle all in one round. (bb_to_key): Use bb->index as key when optimizing for size. (better_edge_p): The bb with smaller index is better when optimizing for size. (connect_traces): When optimizing for size, connect block n with block n + 1; connect trace m with trace m + 1 if falling through. (gate_handle_reorder_blocks): Enable bbro when optimizing for -Os. From-SVN: r191462
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