gimple-parser.c (c_parser_gimple_postfix_expression): Handle _Literal (char *) &"foo" for address literals pointing to STRING_CSTs.

2019-07-01  Richard Biener  <rguenther@suse.de>

	c/
	* gimple-parser.c (c_parser_gimple_postfix_expression): Handle
	_Literal (char *) &"foo" for address literals pointing to
	STRING_CSTs.

	* gcc.dg/gimplefe-42.c: New testcase.

From-SVN: r272872