re PR tree-optimization/53081 (memcpy/memset loop recognition)

re PR tree-optimization/53081 (memcpy/memset loop recognition)

2012-06-05  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/53081
	* tree-loop-distribution.c (generate_memset_builtin): Handle all
	kinds of byte-sized stores.
	(classify_partition): Likewise.
	(tree_loop_distribution): Adjust seed statements used for
	!flag_tree_loop_distribution.

	* gcc.dg/tree-ssa/ldist-19.c: New testcase.
	* gcc.c-torture/execute/builtins/builtins.exp: Always pass
	-fno-tree-loop-distribute-patterns.

From-SVN: r188232