2015-07-16  Richard Biener  <rguenther@suse.de>

	* fold-const.c (fold_widened_comparison): Remove.
	(fold_sign_changed_comparison): Likewise.
	(fold_comparison): Move widened and sign-changed comparison
	simplification ...
	* match.pd: ... to patterns here.
	* generic-match-head.c: Include target.h.
	* gimple-match-head.c: Likewise.

	* gcc.dg/tree-ssa/pr21031.c: Adjust.

From-SVN: r225861