re PR tree-optimization/58697 (wrong code (segfaults) at -O3)

re PR tree-optimization/58697 (wrong code (segfaults) at -O3)

	PR tree-optimization/58697
	* cfgloop.c (get_estimated_loop_iterations_int): Rename from
	estimated_loop_iterations_int.
	(max_stmt_executions_int): Call get_max_loop_iterations_int.
	(get_max_loop_iterations_int): New.  HWINT version of
	get_max_loop_iterations.
	* cfgloop.h: Add prototypes.
	* loop-iv.c (find_simple_exit): call get_estimated_loop_iterations_int.
	* loop-unroll.c (decide_peel_once_rolling): Call
	get_estimated_loop_iterations_int.
	* tree-ssa-loop-niter.c (estimated_loop_iterations_int): Add back.
	* tree-ssa-loop-niter.h: Tweak prototypes.

From-SVN: r203709