PR tree-optimization/84047 - missing -Warray-bounds on an out-of-bounds index into...

PR tree-optimization/84047 - missing -Warray-bounds on an out-of-bounds index into an array

PR tree-optimization/84047 - missing -Warray-bounds on an out-of-bounds index into an array
PR tree-optimization/83776 - missing -Warray-bounds indexing past the end of a string literal

gcc/ChangeLog:

	PR tree-optimization/84047
	PR tree-optimization/83776
	* tree-vrp.c (vrp_prop::check_mem_ref): New function.
	(check_array_bounds): Call it.

gcc/testsuite/ChangeLog:

	PR tree-optimization/83776
	PR tree-optimization/84047
	* gcc.dg/Warray-bounds-29.c: New test.
	* gcc.dg/Warray-bounds-30.c: New test.
	* gcc.dg/Warray-bounds-31.c: New test.
	* gcc.dg/Warray-bounds-32.c: New test.

From-SVN: r262893