http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52406
--- Comment #11 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-04-03 14:30:38 UTC --- Author: rguenth Date: Tue Apr 3 14:30:32 2012 New Revision: 186108 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=186108 Log: 2012-04-03 Richard Guenther <rguent...@suse.de> Backport from mainline 2012-03-02 Richard Guenther <rguent...@suse.de> PR tree-optimization/52406 * tree-data-ref.h: Update documentation about DR_BASE_OBJECT. (struct indices): Add unconstrained_base member. (struct dr_alias): Remove unused vops member. (DR_UNCONSTRAINED_BASE): New define. * tree-data-ref.c (dr_analyze_indices): For COMPONENT_REFs add indices to allow their disambiguation. Make DR_BASE_OBJECT be an artificial access that covers the whole indexed object, or mark it with DR_UNCONSTRAINED_BASE if we cannot do so. Canonicalize plain decl base-objects to their MEM_REF variant. (dr_may_alias_p): When the base-object of either data reference has unknown size use only points-to information. (compute_affine_dependence): Make dumps easier to read and more verbose. * tree-vect-data-ref.c (vector_alignment_reachable_p): Use DR_REF when looking for packed references. (vect_supportable_dr_alignment): Likewise. * gcc.dg/torture/pr52406.c: New testcase. Added: branches/gcc-4_7-branch/gcc/testsuite/gcc.dg/torture/pr52406.c Modified: branches/gcc-4_7-branch/gcc/ChangeLog branches/gcc-4_7-branch/gcc/testsuite/ChangeLog branches/gcc-4_7-branch/gcc/tree-data-ref.c branches/gcc-4_7-branch/gcc/tree-data-ref.h branches/gcc-4_7-branch/gcc/tree-vect-data-refs.c
