Disallow setting of NANs in frange setter unless setting trees.

frange::set() is confusing in that we can set a NAN by specifying a
bound of +-NAN, even though we tecnically disallow NANs in the setter
because the kind can never be VR_NAN.  This is a wart for
get_tree_range(), which builds a range out of a tree from the source,
to work correctly.  It's ugly, and it showed its limitation while
implementing LTO streaming of ranges.

This patch disallows passing NAN bounds in frange::set() and fixes
get_tree_range.

gcc/ChangeLog:

	* value-query.cc (range_query::get_tree_range): Set NAN directly
	if necessary.
	* value-range.cc (frange::set): Assert that bounds are not NAN.

0 files changed, 0 insertions, 0 deletions