PR middle-end/78703 -fprintf-return-value floating point handling incorrect in locales with a mulltibyte decimal point

gcc/ChangeLog:
	PR middle-end/78703
	* gimple-ssa-sprintf.c (struct result_range): Add likely and
	unlikely counters.
	(struct format_result): Replace number_chars, number_chars_min,
	and number_chars_max with a single member of struct result_range.
	Remove bounded.
	(format_result::operator+=): Adjust.
	(struct fmtresult): Remove bounded.  Handle likely and unlikely
	counters.
	(fmtresult::adjust_for_width_or_precision): New function.
	(fmtresult:type_max_digits): New function.
	(bytes_remaining): Handle likely and unlikely counters.
	(min_bytes_remaining): Remove.
	(format_percent): Simplify.
	(format_integer, format_floating): Set likely and unlikely counters.
	(get_string_length, format_character, format_string): Same.
	(format_plain, should_warn_p): New function.
	(maybe_warn): Call should_warn_p.  Update diagnostic messages
	and handle those for all directives, including plain strings.
	(format_directive): Handle likely and unlikely counters.
	Remove unnecessary quoting from diagnostics.  Add an informational
	note.
	(add_bytes): Remove.
	(pass_sprintf_length::compute_format_length): Simplify.
	(try_substitute_return_value): Handle likely and unlikely counters.

gcc/testsuite/ChangeLog:

	PR middle-end/78703
	* gcc.dg/format/pr78569.c: Adjust.
	* gcc.dg/tree-ssa/builtin-snprintf-warn-2.c: Same.
	* gcc.dg/tree-ssa/builtin-sprintf-2.c: Same.
	* gcc.dg/tree-ssa/builtin-sprintf-5.c: Same.
	* gcc.dg/tree-ssa/builtin-sprintf-warn-1.c: Same.
	* gcc.dg/tree-ssa/builtin-sprintf-warn-2.c: Same.
	* gcc.dg/tree-ssa/builtin-sprintf-warn-3.c: Same.
	* gcc.dg/tree-ssa/builtin-sprintf-warn-4.c: Same.
	* gcc.dg/tree-ssa/builtin-sprintf-warn-6.c: Same.
	* gcc.dg/tree-ssa/builtin-sprintf-warn-7.c: Same.
	* gcc.dg/tree-ssa/builtin-sprintf-warn-9.c: Same.
	* gcc.dg/tree-ssa/builtin-sprintf.c: Same.

From-SVN: r244953