PR rtl-optimization/90026
	* cfgcleanup.c (try_optimize_cfg): When removing empty bb with no
	successors, look for BARRIERs inside of the whole BB_FOOTER chain
	rather than just at the start of it.  If e->src BB_FOOTER is not NULL
	in cfglayout mode, use emit_barrier_after_bb.

	* g++.dg/opt/pr90026.C: New test.

From-SVN: r270304