PR middle-end/77445
	* gcc.dg/tree-ssa/pr77445-2.c: Update testcase to check that all
	threading is done.
	* tree-ssa-threadbackward.c (profitable_jump_thread_path): Dump
	statistics of the analyzed path; allow threading for speed when
	any of BBs along the path are optimized for speed.

From-SVN: r245135