* tree.c (tree_operand_check_failed): New function.
	* tree.h (TREE_OPERAND_CHECK, TREE_OPERAND_CHECK_CODE,
	TREE_RTL_OPERAND_CHECK): New checking macros.
	(TREE_OPERAND, SAVE_EXPR_CONTEXT, SAVE_EXPR_RTL,
	RTL_EXPR_SEQUENCE, RTL_EXPR_RTL, WITH_CLEANUP_EXPR_RTL,
	CONSTRUCTOR_ELTS, LABELED_BLOCK_LABEL, LABELED_BLOCK_BODY,
	EXIT_BLOCK_RETURN, LOOP_EXPR_BODY, EXPR_WFL_NODE,
	EXPR_WFL_FILENAME_NODE, EXPR_WFL_FILENAME, TARGET_EXPR_SLOT,
	TARGET_EXPR_INITIAL, TARGET_EXPR_CLEANUP): Use the new
	checking macros.

From-SVN: r65452