loop-unswitch.c (unswitch_single_loop): Use estimated_loop_iterations_int to prevent...

loop-unswitch.c (unswitch_single_loop): Use estimated_loop_iterations_int to prevent unswitching when...

	* loop-unswitch.c (unswitch_single_loop): Use
	estimated_loop_iterations_int to prevent unswitching when loop
	is known to not roll.
	* tree-ssa-loop-niter.c (estimated_loop_iterations): Do not segfault
	when SCEV is not initialized.
	(max_loop_iterations): Likewise.
	* tree-ssa-loop-unswitch.c (tree_ssa_unswitch_loops): Use
	estimated_loop_iterations_int to prevent unswithcing when
	loop is known to not roll.
	* tree-scalar-evolution.c (scev_initialized_p): New function.
	* tree-scalar-evolution.h (scev_initialized_p): Likewise.
	* loop-unroll.c (decide_peel_once_rolling): Use
	max_loop_iterations_int.
	(unroll_loop_constant_iterations): Update
	nb_iterations_upper_bound and nb_iterations_estimate.
	(decide_unroll_runtime_iterations): Use
	estimated_loop_iterations or max_loop_iterations;
	(unroll_loop_runtime_iterations): fix profile updating.
	(decide_peel_simple): Use estimated_loop_iterations
	and max_loop_iterations.
	(decide_unroll_stupid): Use estimated_loop_iterations
	ad max_loop_iterations.
	* loop-doloop.c (doloop_modify): Use max_loop_iterations_int.
	(doloop_optimize): Likewise.
	* loop-iv.c (iv_number_of_iterations): Use record_niter_bound.
	(find_simple_exit): Likewise.
	* cfgloop.h (struct niter_desc): Remove niter_max.

From-SVN: r192219