gcc/

	* tree-chkp-opt.c (chkp_get_nobnd_fndecl): New.
	(chkp_get_nochk_fndecl): New.
	(chkp_optimize_string_function_calls): New.
	(chkp_opt_execute): Call chkp_optimize_string_function_calls.
	* tree-cfg.h (insert_cond_bb): New.
	* tree-cfg.c (insert_cond_bb): New.

gcc/testsuite/

	* gcc.target/i386/chkp-stropt-1.c: New.
	* gcc.target/i386/chkp-stropt-2.c: New.
	* gcc.target/i386/chkp-stropt-3.c: New.
	* gcc.target/i386/chkp-stropt-4.c: New.
	* gcc.target/i386/chkp-stropt-5.c: New.
	* gcc.target/i386/chkp-stropt-6.c: New.
	* gcc.target/i386/chkp-stropt-7.c: New.
	* gcc.target/i386/chkp-stropt-8.c: New.
	* gcc.target/i386/chkp-stropt-9.c: New.
	* gcc.target/i386/chkp-stropt-10.c: New.
	* gcc.target/i386/chkp-stropt-11.c: New.
	* gcc.target/i386/chkp-stropt-12.c: New.
	* gcc.target/i386/chkp-stropt-13.c: New.
	* gcc.target/i386/chkp-stropt-14.c: New.
	* gcc.target/i386/chkp-stropt-15.c: New.
	* gcc.target/i386/chkp-stropt-16.c: New.

From-SVN: r217656