PR tree-optimization/89550

	PR tree-optimization/89550
	* builtins.c (c_strlen): Only set TREE_NO_WARNING if warning_at
	returned true.  Formatting fixes.
	(expand_builtin_strnlen): Formatting fixes.
	* tree-vrp.c (vrp_prop::check_mem_ref): Only set TREE_NO_WARNING
	if warning_at returned true.
	* tree-cfg.c (pass_warn_function_return::execute): Likewise.
c-family/
	* c-common.c (c_common_truthvalue_conversion): Only set
	TREE_NO_WARNING if warning_at returned true.
	* c-warn.c (overflow_warning, warn_logical_operator): Likewise.
c/
	* c-decl.c (finish_function): Only set TREE_NO_WARNING if warning_at
	returned true.
	(c_write_global_declarations_1): Only set TREE_NO_WARNING if pedwarn
	or warning returned true.
cp/
	* semantics.c (maybe_convert_cond): Only set TREE_NO_WARNING if
	warning_at returned true.
	* decl2.c (c_parse_final_cleanups): Likewise.
	* typeck.c (convert_for_assignment): Likewise.
	* decl.c (finish_function): Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@269485 138bc75d-0d04-0410-961f-82ee72b054a4