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* cprop.c (implicit_set_cond_p): Assume nothing about COND, move checks on form of COND from find_implicit_sets to here. (find_implicit_sets): Cleanup control flow. Split critical edges if it exposes implicit sets. Allocate/resize implicit_sets as necessary. (one_cprop_pass): Only delete unreachable blocks if local_cprop_pass changed something. Run df_analyze after find_implicit_sets if any edges were split. Do not allocate implicit_sets here. From-SVN: r171946
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