https://gcc.gnu.org/ml/gcc-patches/2019-04/msg01266.html
	gcc/
	* tree.h (MARK_TS_EXP): New.

	gcc/c-family/
	* c-common.c (c_common_init_ts): Use MARK_TS_EXP.  Mark SIZEOF_EXPR.

	gcc/cp/
	* cp-objcp-common.c (cp_common_init_ts): Use MARK_TS_EXP for _EXPR
	nodes.  Call c_common_init_ts.

From-SVN: r270711