gimple-parser.c (c_parser_gimple_postfix_expression): Support _Literal (int *) &x...

gimple-parser.c (c_parser_gimple_postfix_expression): Support _Literal (int *) &x for address literals.

2019-07-10  Richard Biener  <rguenther@suse.de>

	c/
	* gimple-parser.c (c_parser_gimple_postfix_expression): Support
	_Literal (int *) &x for address literals.

	* tree-ssa-sccvn.c (vn_reference_lookup_3): Look at valueized
	LHS whenever possible.

	* gcc.dg/torture/ssa-fre-5.c: New testcase.
	* gcc.dg/torture/ssa-fre-6.c: Likewise.
	* gcc.dg/torture/ssa-fre-7.c: Likewise.

From-SVN: r273354