PR ipa/84628
	* expr.c (expand_expr_real_1) <case CALL_EXPR>: Don't emit diagnostics
	for error or warning attributes if CALL_FROM_THUNK_P is set.
	Formatting fixes.

	* gcc.dg/pr84628.c: New test.

Co-Authored-By: Richard Biener <rguenther@suse.de>

From-SVN: r258140