PR middle-end/79275 -  -Wformat-overflow false positive exceeding INT_MAX in glibc sysdeps/posix/tempname.c

gcc/testsuite/ChangeLog:

	PR middle-end/79275
	* gcc.dg/tree-ssa/builtin-sprintf-warn-11.c: New test.
	* gcc.dg/tree-ssa/pr79275.c: New test.

gcc/ChangeLog:

	PR middle-end/79275
	* gimple-ssa-sprintf.c (get_string_length): Set lower bound to zero.
	(format_string): Tighten up the range of output for non-constant
	strings and correct the expected range for wide non-constant strings.

From-SVN: r245142