* gcc-interface/trans.c (loop_info_d): Add low_bound, high_bound,

	* gcc-interface/trans.c (loop_info_d): Add low_bound, high_bound,
	artificial, has_checks and warned_aggressive_loop_optimizations.
	(gigi): Set warn_aggressive_loop_optimizations to 0.
	(inside_loop_p): New inline predicate.
	(push_range_check_info): Rename into...
	(find_loop_for): ...this and do not push range_check_info_d object.
	(Loop_Statement_to_gnu): Set artificial, low_bound and high_bound
	fields of gnu_loop_info.  Adjust detection of checks enabled by
	-funswitch-loops and adds one for -faggressive-loop-optimizations.
	(gnat_to_gnu) <N_Indexed_Component>: If aggressive loop optimizations
	are enabled, warn for loops overrunning an array of size 1 not at the
	end of a record.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@224998 138bc75d-0d04-0410-961f-82ee72b054a4