genmatch.c (struct sinfo, [...]): New hash-map to record equivalent transforms.

genmatch.c (struct sinfo, [...]): New hash-map to record equivalent transforms.

2015-08-03  Richard Biener  <rguenther@suse.de>

	* genmatch.c (struct sinfo, struct sinfo_hashmap_traits, sinfo_map_t):
	New hash-map to record equivalent transforms.
	(dt_node::analyze): Populate the equivalent transforms hash-map.
	(dt_simplify::info): Add reference to hash-map entry.
	(dt_simplify::gen): If we have split out a function for the
	transform, generate a call to it.
	(sinfo_hashmap_traits::hash): New function.
	(compare_op): New helper function for ...
	(sinfo_hashmap_traits::equal_keys): ... this new function.
	(decision_tree::gen): Split out common equivalent transforms
	into functions.

From-SVN: r226490