2010-06-10  Martin Jambor  <mjambor@suse.cz>

	PR tree-optimization/44258
	* tree-sra.c (build_access_subtree): Return false iff there is a
	partial overlap.
	(build_access_trees): Likewise.
	(analyze_all_variable_accesses): Disqualify candidates if
	build_access_trees returns true for them.

	* testsuite/gcc.dg/tree-ssa/pr44258.c: New test.

From-SVN: r160561