re PR middle-end/53084 (GCC cannot handle array initialization of string constant with point arithmetic properly)

	PR middle-end/53084
	* varasm.c (compute_reloc_for_constant): Handle ADDR_EXPR
	of MEM_REF.
	(output_addressed_constants): Likewise.

	* gcc.c-torture/execute/pr53084.c: New test.

From-SVN: r186742