re PR target/43808 (-fipa-reference -fschedule-insns -fstrict-aliasing causes two gfortran check failures)

	PR target/43808
	* cfgexpand.c (partition_stack_vars): Call
	update_alias_info_with_stack_vars unconditionally.
	(update_alias_info_with_stack_vars): Allow unused
	unreferenced vars when not optimizing.

	* gfortran.dg/pr43808.f90: New test.

From-SVN: r166509