https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71466
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with r236831:
Author: law <law@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri May 27 16:32:38 2016 +0000
* tree-ssa-threadedge.c: Remove include of tree-ssa-threadbackward.h.
(thread_across_edge): Remove calls to find_jump_threads_backwards.
* passes.def: Add jump threading passes before DOM/VRP.
* tree-ssa-threadbackward.c (find_jump_threads_backwards): Change
argument to a basic block from an edge. Remove tests which are
handled elsewhere.
(pass_data_thread_jumps, class pass_thread_jumps): New.
(pass_thread_jumps::gate, pass_thread_jumps::execute): New.
(make_pass_thread_jumps): Likewise.
* tree-pass.h (make_pass_thread_jumps): Declare.
