Refactor try_vectorize_loop_1

This refactors epilogue loop handling in try_vectorize_loop_1 to not
suggest we're analyzing those there by splitting out the transform
phase which then can handle the epilogues.

2021-10-27  Richard Biener  <rguenther@suse.de>

	* tree-vectorizer.c (vect_transform_loops): New function,
	split out from ...
	(try_vectorize_loop_1): ... here.  Simplify as epilogues
	are now fully handled in the split part.
1 file changed