* c-common.c (c_common_truthvalue_conversion): Don't warn if
	TREE_NO_WARNING is set.

cp/
	* cp-tree.h (C_SET_EXP_ORIGINAL_CODE): Remove.
	* decl2.c (grokfield): Don't check current_class_depth via
	unused TREE_COMPLEXITY.
	* semantics.c (finish_parenthesized_expr): Set TREE_NO_WARNING
	to avoid the missing parentheses warning.
	Don't set C_SET_EXP_ORIGINAL_CODE.

Co-Authored-By: Joseph Myers <jsm@polyomino.org.uk>

From-SVN: r84903