[PR tree-optimization/68599] Avoid over-zealous optimization with -funsafe-loop-optim...

[PR tree-optimization/68599] Avoid over-zealous optimization with -funsafe-loop-optimizations

	PR tree-optimization/68599
	* loop-init.c (rtl_loop_init): Set LOOPS_HAVE_RECORDED_EXITS
	in call to loop_optimizer_init.
	* loop-iv.c (get_simple_loop_desc): Only allow unsafe loop
	optimization to drop the assumptions/infinite notations if
	the loop has a single exit.

From-SVN: r231231