Add transitive operations to the relation oracle.

Add transitive operations to the relation oracle.

When registering relations in the oracle, search for other relations which
imply new transitive relations.

	gcc/
	* value-relation.cc (rr_transitive_table): New.
	(relation_transitive): New.
	(value_relation::swap): Remove.
	(value_relation::apply_transitive): New.
	(relation_oracle::relation_oracle): Allocate a new tmp bitmap.
	(relation_oracle::register_relation): Call register_transitives.
	(relation_oracle::register_transitives): New.
	* value-relation.h (relation_oracle): Add new temporary bitmap and
	methods.

	gcc/testsuite/
	* gcc.dg/predict-1.c: Disable evrp.
	* gcc.dg/tree-ssa/evrp-trans.c: New.