[Bug tree-optimization/55334] [4.8/4.9/5 Regression] mgrid regression (ipa-cp disables vectorization)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55334

--- Comment #45 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Nov 24 09:24:50 2014
New Revision: 218005

URL: https://gcc.gnu.org/viewcvs?rev=218005&root=gcc&view=rev
Log:
2014-11-24  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/55334
    * function.h (struct function): Add last_clique member.
    * tree-inline.c (remap_dependence_clique): New function.
    (remap_gimple_op_r): Remap dependence cliques in MEM_REFs.
    (copy_tree_body_r): Likewise.
    (copy_cfg_body): Free dependence map.
    (copy_gimple_seq_and_replace_locals): Likewise.
    * tree-pretty-print.c (dump_generic_node): Dump
    dependence info.
    * tree-ssa-alias.c (refs_may_alias_p_1): Use dependence info
    to answer alias query.
    * tree-ssa-structalias.c: Include tree-phinodes.h, ssa-iterators.h,
    tree-pretty-print.h and gimple-walk.h.
    (struct variable_info): Add is_restrict_var flag and ruid
    member.
    (new_var_info): Initialize is_restrict_var.
    (make_constraint_from_restrict): Likewise.
    (create_variable_info_for): Exclude restricts from global vars
    from new handling.
    (intra_create_variable_infos): But not those from parameters.
    (visit_loadstore): New function.
    (maybe_set_dependence_info): Likewise.
    (compute_dependence_clique): Likewise.
    (compute_may_aliases): Call compute_dependence_clique.
    * tree-data-ref.c (dr_analyze_indices): Copy dependence info
    to fake MEM_REF.
    (dr_may_alias_p): Use recorded dependence info to answer
    alias query.
    * tree-core.h (struct tree_base): Add clique, base struct in
    union.
    * tree.h (MR_DEPENDENCE_CLIQUE): New macro.
    (MR_DEPENDENCE_BASE): Likewise.
    * tree-inline.h (dependence_hasher): New hash-map kind.
    (struct copy_body_data): Add dependence_map pointer.
    * gimple-fold.c (maybe_canonicalize_mem_ref_addr): Avoid
    throwing away dependence info.
    * tree-streamer-in.c (unpack_value_fields): Stream dependence info.
    * tree-streamer-out.c (streamer_pack_tree_bitfields): Likewise.

    * gcc.dg/tree-ssa/restrict-5.c: New testcase.

Modified:
    trunk/gcc/tree-ssa-structalias.c