Add Ranger temporal cache

Add Ranger temporal cache

Add a timestamp to supplement the global range cache to detect when a value
may become stale.

	gcc/
	PR tree-optimization/97515
	* gimple-range-cache.h (class ranger_cache): New prototypes plus
	temporal cache pointer.
	* gimple-range-cache.cc (struct range_timestamp): New.
	(class temporal_cache): New.
	(temporal_cache::temporal_cache): New.
	(temporal_cache::~temporal_cache): New.
	(temporal_cache::get_timestamp): New.
	(temporal_cache::set_dependency): New.
	(temporal_cache::temporal_value): New.
	(temporal_cache::current_p): New.
	(temporal_cache::set_timestamp): New.
	(temporal_cache::set_always_current): New.
	(ranger_cache::ranger_cache): Allocate the temporal cache.
	(ranger_cache::~ranger_cache): Free temporal cache.
	(ranger_cache::get_non_stale_global_range): New.
	(ranger_cache::set_global_range): Add a timestamp.
	(ranger_cache::register_dependency): New.  Add timestamp dependency.
	* gimple-range.cc (gimple_ranger::range_of_range_op): Add operand
	dependencies.
	(gimple_ranger::range_of_phi): Ditto.
	(gimple_ranger::range_of_stmt): Check if global range is stale, and
	recalculate if so.
	gcc/testsuite/
	* gcc.dg/pr97515.c: Check listing for folding of entire function.