re PR tree-optimization/45578 (The polyhedron test mdbx is miscompiled with -O2 -ftree-vectorize at revision 163915)

2010-09-08  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/45578
	* tree-ssa-loop-ivopts.c (rewrite_use_nonlinear_expr):
	Be more careful when transfering alignment information to
	the new induction variable.
	(copy_ref_info): Likewise.

	* gfortran.dg/pr45578.f90: New testcase.

From-SVN: r163997