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Andrew MacLeod
authored
Standardize equiv_oracle API onto the new relation_oracle virtual base, and then have dom_oracle inherit from that. equiv_set always returns an equivalency set now, never NULL. EQ_EXPR requires symmetry now. Each SSA name must be in the other equiv set. Shuffle some routines around, simplify. * gimple-range-cache.cc (ranger_cache::ranger_cache): Create a DOM based oracle. * gimple-range-fold.cc (fur_depend::register_relation): Use register_stmt/edge routines. * value-relation.cc (equiv_chain::find): Relocate from equiv_oracle. (equiv_oracle::equiv_oracle): Create self equivalence cache. (equiv_oracle::~equiv_oracle): Release same. (equiv_oracle::equiv_set): Return entry from self equiv cache if there are no equivalences. (equiv_oracle::find_equiv_block): Move list find to equiv_chain. (equiv_oracle::register_relation): Rename from register_equiv. (relation_chain_head::find_relation): Relocate from dom_oracle. (relation_oracle::register_stmt): New. (relation_oracle::register_edge): New. (dom_oracle::*): Rename from relation_oracle. (dom_oracle::register_relation): Adjust to call equiv_oracle. (dom_oracle::set_one_relation): Split from register_relation. (dom_oracle::register_transitives): Consolidate 2 methods. (dom_oracle::find_relation_block): Move core to relation_chain. (dom_oracle::query_relation): Rename from find_relation_dom and adjust. * value-relation.h (class relation_oracle): New pure virtual base. (class equiv_oracle): Inherit from relation_oracle and adjust. (class dom_oracle): Rename from old relation_oracle and adjust.