* params.def (PARAM_MAX_ITERATIONS_COMPUTATION_COST): New.

	* loop-doloop.c (doloop_optimize): Use it to limit costs of
	expanding the number of iterations.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@116966 138bc75d-0d04-0410-961f-82ee72b054a4