[Bug tree-optimization/66036] strided group loads are not vectorized

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66036

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri May  8 15:13:55 2015
New Revision: 222914

URL: https://gcc.gnu.org/viewcvs?rev=222914&root=gcc&view=rev
Log:
2015-05-08  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/66036
        * tree-vect-data-refs.c (vect_compute_data_ref_alignment):
        Handle strided group loads.
        (vect_verify_datarefs_alignment): Likewise.
        (vect_enhance_data_refs_alignment): Likewise.
        (vect_analyze_group_access): Likewise.
        (vect_analyze_data_ref_access): Likewise.
        (vect_analyze_data_ref_accesses): Likewise.
        * tree-vect-stmts.c (vect_model_load_cost): Likewise.
        (vectorizable_load): Likewise.

        * gcc.dg/vect/slp-41.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/vect/slp-41.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-data-refs.c
    trunk/gcc/tree-vect-stmts.c