tree-ssa-pre.c: Update comments.
2004-06-17 Daniel Berlin <dberlin@dberlin.org> * tree-ssa-pre.c: Update comments. (val_expr_pair_eq): Factor code from here. (expr_pred_trans_eq): and here. (expressions_equal_p): To here. (print_value_set): Print value for expression. (phi_trans_lookup): Rename some variables. (lookup): Ditto. (value_exists_in_set_bitmap): Ditto. (value_remove_from_set_bitmap): Ditto. (value_insert_into_set_bitmap): Ditto. From-SVN: r83290
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