PR sanitizer/78270
	* gimplify.c (gimplify_switch_expr): Always save previous
	gimplify_ctxp->live_switch_vars.
	PR sanitizer/78270
	* gcc.dg/asan/pr78270.c: Update comment style.
	* gcc.dg/asan/pr78270-2.c: New test.

From-SVN: r242485