PR tree-optimization/80523 - -Wformat-overflow doesn't consider -fexec-charset

PR tree-optimization/80523 -  -Wformat-overflow doesn't consider -fexec-charset

gcc/ChangeLog:

	PR tree-optimization/80523
	* gimple-ssa-sprintf.c (target_to_host_charmap): New global variable.
	(init_target_to_host_charmap, target_to_host, target_strtol10): New
	functions.
	(maybe_warn, format_directive, parse_directive): Use new functions.
	(pass_sprintf_length::execute): Call init_target_to_host_charmap.

gcc/testsuite/ChangeLog:

	PR tree-optimization/80523
	* gcc.dg/tree-ssa/builtin-sprintf-warn-18.c: New test.

From-SVN: r247401