2015-12-02  Richard Biener  <rguenther@suse.de>

	* tree.h (tree_invariant_p): Declare.
	* tree.c (tree_invariant_p): Export.
	* genmatch.c (dt_simplify::gen_1): For GENERIC code-gen never
	create SAVE_EXPRs but reject patterns if we would need to.

From-SVN: r231178