Directly resolve range_of_stmt dependencies.

All ranger API entries eventually call range_of_stmt to ensure there is an
initial global value to work with.  This can cause very deep call chains when
satisfied via the normal API.  Instead, push any dependencies onto a stack
and evaluate them in a depth first manner, mirroring what would have happened
via the normal API calls.

	PR tree-optimization/103231
	gcc/
	* gimple-range.cc (gimple_ranger::gimple_ranger): Create stmt stack.
	(gimple_ranger::gimple_ranger): Delete stmt stack.
	(gimple_ranger::range_of_stmt): Process depenedencies if they have no
	global cache entry.
	(gimple_ranger::prefill_name): New.
	(gimple_ranger::prefill_stmt_dependencies): New.
	* gimple-range.h (class gimple_ranger): Add prototypes.

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