PR middle-end/84095 - false-positive -Wrestrict warnings for memcpy within array

PR middle-end/84095 - false-positive -Wrestrict warnings for memcpy within array

gcc/ChangeLog:

	PR middle-end/84095
	* gimple-ssa-warn-restrict.c (builtin_memref::extend_offset_range): New.
	(builtin_memref::set_base_and_offset): Same.  Handle inner references.
	(builtin_memref::builtin_memref): Factor out parts into
	set_base_and_offset and call it.

gcc/testsuite/ChangeLog:

	PR middle-end/84095
	* c-c++-common/Warray-bounds-3.c: Adjust text of expected warnings.
	* c-c++-common/Wrestrict.c: Same.
	* gcc.dg/Wrestrict-6.c: Same.
	* gcc.dg/Warray-bounds-27.c: New test.
	* gcc.dg/Wrestrict-8.c: New test.
	* gcc.dg/Wrestrict-9.c: New test.
	* gcc.dg/pr84095.c: New test.

From-SVN: r257860