PR tree-optimization/71625 - missing strlen optimization on different array initializ...

PR tree-optimization/71625 - missing strlen optimization on different array initialization style

gcc/c/ChangeLog:

	PR tree-optimization/71625
	* c-parser.c (c_parser_declaration_or_fndef): Call
	braced_list_to_string.

gcc/c-family/ChangeLog:

	PR tree-optimization/71625
	* c-common.c (braced_list_to_string): New function.
	* c-common.h (braced_list_to_string): Declare it.

gcc/cp/ChangeLog:

	PR tree-optimization/71625
	* decl.c (check_initializer):  Call braced_list_to_string.
	(eval_check_narrowing): New function.
	* gcc/cp/typeck2.c (digest_init_r): Accept strings literals
	as initilizers for all narrow character types.

gcc/testsuite/ChangeLog:

	PR tree-optimization/71625

	* g++.dg/init/string2.C: New test.
	* g++.dg/init/string3.C: New test.
	* g++.dg/init/string4.C: New test.
	* gcc.dg/init-string-3.c: New test.
	* gcc.dg/strlenopt-55.c: New test.
	* gcc.dg/strlenopt-56.c: New test.

From-SVN: r263511