re PR ada/68590 (FAIL: gnat.dg/loop_optimization19.adb scan-tree-dump-not optimized...

re PR ada/68590 (FAIL: gnat.dg/loop_optimization19.adb scan-tree-dump-not optimized "Index_Check")

2015-12-01  Richard Biener  <rguenther@suse.de>

	PR middle-end/68590
	* genmatch.c (struct capture_info): Add match_use_count.
	(capture_info::walk_match): Increment match_use_count.
	(dt_simplify::gen_1): For GENERIC, only wrap multi-use
	replacements in a save_expr if they occur more often than
	in the original expression.

From-SVN: r231110