re PR tree-optimization/58223 (wrong code at -O3 on x86_64-linux-gnu)

re PR tree-optimization/58223 (wrong code at -O3 on x86_64-linux-gnu)

2013-08-30  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/58223
	* tree-loop-distribution.c (has_anti_dependence): Rename to ...
	(has_anti_or_output_dependence): ... this and adjust to also
	look for output dependences.
	(mark_nodes_having_upstream_mem_writes): Adjust.
	(rdg_flag_uses): Likewise.

	* gcc.dg/torture/pr58223.c: New testcase.
	* gcc.dg/tree-ssa/ldist-16.c: Flip expected behavior.

From-SVN: r202096