re PR rtl-optimization/25654 (RTL alias analysis unprepared to handle stack slot...

re PR rtl-optimization/25654 (RTL alias analysis unprepared to handle stack slot sharing)

2006-01-23  Steven Bosscher  <stevenb.gcc@gmail.com>
	Jan Hubicka  <jh@suse.cz>
	Richard Guenther  <rguenther@suse.de>

	PR rtl-optimization/25654
	* cfgexpand.c (aggregate_contains_union_type): New function.
	(add_alias_set_conflicts): Call it.  Make sure to add conflicts
	for structure variables that contain a union type.

	* gcc.dg/torture/pr25654.c: New testcase.
	* gcc.target/i386/pr25654.c: Likewise.

Co-Authored-By: Jan Hubicka <jh@suse.cz>
Co-Authored-By: Richard Guenther <rguenther@suse.de>
From-SVN: r110109