2019-08-02  Richard Biener  <rguenther@suse.de>

	* vec.h (vec::sort): Add gcc_qsort_r support.
	(vec::bsearch): Add an overload with gcc_qsort_r style callbacks.
	* tree-ssa-loop-im.c (sort_bbs_in_loop_postorder_cmp): Adjust
	to gcc_qsort_r style callback.
	(sort_locs_in_loop_postorder_cmp): Likewise.
	(analyze_memory_references): Use gcc_sort_r interfaces.
	(find_ref_loc_in_loop_cmp): Use new bsearch overload.

From-SVN: r274004