[Bug c++/13146] inheritance for nonoverlapping_component_refs_p

[Bug c++/13146] inheritance for nonoverlapping_component_refs_p

[rguenth at gcc dot gnu dot org]

------- Comment #7 from rguenth at gcc dot gnu dot org  2008-03-14 20:30 -------
The testcase is fixed by the SCCVN alias-oracle patch.  I don't see how
BINFOs should be needed here - if the MEM_REFs are still there the
disambiguation can happen based on the member offsets, no?


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rguenth at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13146

[Bug c++/13146] inheritance for nonoverlapping_component_refs_p

[dann at godzilla dot ics dot uci dot edu]

------- Comment #8 from dann at godzilla dot ics dot uci dot edu  2008-03-15 00:28 -------
(In reply to comment #7)
> The testcase is fixed by the SCCVN alias-oracle patch.

Are you sure? I still see the problem (.final_cleanup dump):

void bar(first*, multi*) (s1, s3)
{
<bb 2>:
  s1->f1 = 0;
  s3->f3 = 0;
  s1->f1 = s1->f1 + 1;
  s3->f3 = s3->f3 + 1;
  s1->f1 = s1->f1 + 1;
  s3->f3 = s3->f3 + 1;
  if (s1->f1 != 2)
    goto <bb 3>;
  else
    goto <bb 4>;
<bb 3>:
  link_error () [tail call];
<bb 4>:
  return;
}
void foo(first*, second*) (s1, s2)
{
<bb 2>:
  s1->f1 = 0;
  s2->f2 = 0;
  s1->f1 = s1->f1 + 1;
  s2->f2 = s2->f2 + 1;
  s1->f1 = s1->f1 + 1;
  s2->f2 = s2->f2 + 1;
  if (s1->f1 != 2)
    goto <bb 3>;
  else
    goto <bb 4>;
<bb 3>:
  link_error () [tail call];
<bb 4>:
  return;
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13146

[Bug c++/13146] inheritance for nonoverlapping_component_refs_p

[rguenth at gcc dot gnu dot org]

------- Comment #9 from rguenth at gcc dot gnu dot org  2008-03-15 12:28 -------
Ah, indeed.  It was fixed by the patch for PR23094 that I had applied ;)
Maybe adjust this testcase to not be a dup of PR23094.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13146

[Bug c++/13146] inheritance for nonoverlapping_component_refs_p

[rguenth at gcc dot gnu dot org]

------- Comment #10 from rguenth at gcc dot gnu dot org  2008-03-15 12:40 -------
the nonoverlapping_memrefs_p check can be simplified (consolidated) by using
the generic get_ref_base_and_extent code.  The result of that can be adjusted
by MEM_OFFSET and only in case of an indirect base we may try to
disambiguate based on struct contain-ness of the types of that accesses.

Maybe I'll have a look, as this sounds uselful in general.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |rguenth at gcc dot gnu dot
                   |dot org                     |org
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2006-01-15 20:43:32         |2008-03-15 12:40:51
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13146

[Bug middle-end/13146] inheritance for nonoverlapping_component_refs_p

[rguenth at gcc dot gnu dot org]

------- Comment #11 from rguenth at gcc dot gnu dot org  2008-05-16 11:12 -------
C testcase:

struct A {
  int i;
};
struct B {
  struct A a;
  int j;
};

int foo (struct A *p, struct B *q)
{
  p->i = 0;
  q->j = 1;
  return p->i;
}

we should optimize this to return zero.

The reasoning is that while p may access a part of *q we still can tell
that q->j is not in that part.  Thus for offset based disambiguation with
two pointers we can in some cases find a common base.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|c++                         |middle-end


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13146

[Bug middle-end/13146] inheritance for nonoverlapping_component_refs_p

[rguenth at gcc dot gnu dot org]

------- Comment #12 from rguenth at gcc dot gnu dot org  2009-01-17 12:58 -------
Note that we have to be very careful here because

struct X {
  int i;
};
struct A {
  int i;
};
struct B {
  struct A a;
  int j;
};

int foo (struct X *p, struct B *q)
{
  p->i = 0;
  q->a.i = 1;
  return p->i;
}

may be aliasing.  One need to consult the C standard and defect reports again
for the "common initial sequence" in structs stuff.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13146

[Bug middle-end/13146] inheritance for nonoverlapping_component_refs_p

[rguenth at gcc dot gnu dot org]

------- Comment #13 from rguenth at gcc dot gnu dot org  2009-01-17 16:03 -------
Subject: Bug 13146

Author: rguenth
Date: Sat Jan 17 16:02:36 2009
New Revision: 143469

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=143469
Log:
2009-01-17  Richard Guenther  <rguenther@suse.de>

        PR middle-end/13146
        PR tree-optimization/38895
        * tree-ssa-alias.c (same_type_for_tbaa): New helper function.
        (refs_may_alias_p): Use it.  Extend access path based disambiguation.

        * gcc.dg/tree-ssa/pr13146.c: New testcase.
        * gcc.dg/tree-ssa/pr38895.c: Likewise.
        * g++.dg/tree-ssa/pr13146.C: Likewise.

Added:
    branches/alias-improvements/gcc/testsuite/g++.dg/tree-ssa/pr13146.C
    branches/alias-improvements/gcc/testsuite/gcc.dg/tree-ssa/pr13146.c
    branches/alias-improvements/gcc/testsuite/gcc.dg/tree-ssa/pr38895.c
Modified:
    branches/alias-improvements/gcc/ChangeLog.alias
    branches/alias-improvements/gcc/tree-ssa-alias.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13146

[Bug middle-end/13146] inheritance for nonoverlapping_component_refs_p

[rguenth at gcc dot gnu dot org]

------- Comment #14 from rguenth at gcc dot gnu dot org  2009-04-03 10:26 -------
Subject: Bug 13146

Author: rguenth
Date: Fri Apr  3 10:24:28 2009
New Revision: 145494

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=145494
Log:
2009-04-03  Richard Guenther  <rguenther@suse.de>

        PR middle-end/13146
        PR tree-optimization/23940
        PR tree-optimization/33237
        PR middle-end/33974
        PR middle-end/34093
        PR tree-optimization/36201
        PR tree-optimization/36230
        PR tree-optimization/38049
        PR tree-optimization/38207
        PR tree-optimization/38230
        PR tree-optimization/38301
        PR tree-optimization/38585
        PR middle-end/38895
        PR tree-optimization/38985
        PR tree-optimization/39299
        * tree-ssa-structalias.h: Remove.
        * tree-ssa-operands.h (NULL_USE_OPERAND_P): Make of type use_operand_p.
        (NULL_DEF_OPERAND_P): Make of type def_operand_p.
        (struct vuse_element_d): Remove.
        (struct vuse_vec_d): Likewise.
        (VUSE_VECT_NUM_ELEM, VUSE_VECT_ELEMENT_NC, VUSE_ELEMENT_PTR_NC,
        VUSE_ELEMENT_VAR_NC, VUSE_VECT_ELEMENT, VUSE_ELEMENT_PTR,
        SET_VUSE_VECT_ELEMENT, SET_VUSE_ELEMENT_VAR, SET_VUSE_ELEMENT_PTR,
        VUSE_ELEMENT_VAR): Likewise.
        (struct voptype_d): Likewise.
        (NUM_VOP_FREE_BUCKETS): Likewise.
        (struct ssa_operands): Remove vop_free_buckets and mpt_table fields.
        (struct stmt_operands_d): Remove.
        (VUSE_OP_PTR, VUSE_OP, SET_VUSE_OP, VUSE_NUM, VUSE_VECT,
        VDEF_RESULT_PTR, VDEF_RESULT, VDEF_OP_PTR, VDEF_OP, SET_VDEF_OP,
        VDEF_NUM, VDEF_VECT): Likewise.
        (copy_virtual_operands): Remove.
        (operand_build_cmp): Likewise.
        (create_ssa_artificial_load_stmt): Likewise.
        (enum ssa_op_iter_type): Remove ssa_op_iter_vdef.
        (struct ssa_operand_iterator_d): Remove vuses, vdefs, mayusesm
        vuse_index and mayuse_index members.  Pack and move done and iter_type
        members to the front.
        (SSA_OP_VMAYUSE): Remove.
        (SSA_OP_VIRTUAL_USES): Adjust.
        (FOR_EACH_SSA_VDEF_OPERAND): Remove.
        (unlink_stmt_vdef): Declare.
        (add_to_addressable_set): Remove.
        * tree-vrp.c (stmt_interesting_for_vrp): Adjust.
        (vrp_visit_stmt): Likewise.
        * doc/tree-ssa.texi (Alias analysis): Update.
        * doc/invoke.texi (max-aliased-vops): Remove docs.
        (avg-aliased-vops): Likewise.
        * tree-into-ssa.c (syms_to_rename): Remove.
        (need_to_update_vops_p): Likewise.
        (need_to_initialize_update_ssa_p): Rename to ...
        (update_ssa_initialized_fn): ... this.  Track function we are
        initialized for.
        (symbol_marked_for_renaming): Simplify.
        (add_new_name_mapping): Do not set need_to_update_vops_p.
        (dump_currdefs): Use SYMS_TO_RENAME.
        (rewrite_update_stmt): Always walk all uses/defs.
        (dump_update_ssa): Adjust.
        (init_update_ssa): Take function argument.  Track what we are
        initialized for.
        (delete_update_ssa): Reset SYMS_TO_RENAME and
update_ssa_initialized_fn.
        (create_new_def_for): Initialize for cfun, assert we are initialized
        for cfun.
        (mark_sym_for_renaming): Simplify.
        (mark_set_for_renaming): Do not initialize update-ssa.
        (need_ssa_update_p): Simplify.  Take function argument.
        (name_mappings_registered_p): Assert we ask for the correct function.
        (name_registered_for_update_p): Likewise.
        (ssa_names_to_replace): Likewise.
        (release_ssa_name_after_update_ssa): Likewise.
        (update_ssa): Likewise.  Use SYMS_TO_RENAME.
        (dump_decl_set): Do not print a newline.
        (debug_decl_set): Do it here.
        (dump_update_ssa): And here.
        * tree-ssa-loop-im.c (move_computations): Adjust.
        (movement_possibility): Likewise.
        (determine_max_movement): Likewise.
        (gather_mem_refs_stmt): Likewise.
        * tree-dump.c (dequeue_and_dump): Do not handle SYMBOL_MEMORY_TAG
        or NAME_MEMORY_TAG.
        * tree-complex.c (update_all_vops): Remove.
        (expand_complex_move): Adjust.
        * tree-ssa-loop-niter.c (chain_of_csts_start): Use NULL_TREE.
        Simplify test for memory referencing statement.  Exclude
        non-invariant ADDR_EXPRs.
        * tree-pretty-print.c (dump_generic_node): Do not handle memory tags.
        * tree-loop-distribution.c (generate_memset_zero): Adjust.
        (rdg_flag_uses): Likewise.
        * tree-tailcall.c (suitable_for_tail_opt_p): Remove memory-tag
        related code.
        (tree_optimize_tail_calls_1): Also split the
        edge from the entry block if we have degenerate PHI nodes in
        the first basic block.
        * tree.c (init_ttree): Remove memory-tag related code.
        (tree_code_size): Likewise.
        (tree_node_structure): Likewise.
        (build7_stat): Re-write to be build6_stat.
        * tree.h (MTAG_P, TREE_MEMORY_TAG_CHECK, TMR_TAG): Remove.
        (SSA_VAR_P): Adjust.
        (struct tree_memory_tag): Remove.
        (struct tree_memory_partition_tag): Likewise.
        (union tree_node): Adjust.
        (build7): Re-write to be build6.
        * tree-pass.h (pass_reset_cc_flags): Remove.
        (TODO_update_address_taken): New flag.
        (pass_simple_dse): Remove.
        * ipa-cp.c (ipcp_update_callgraph): Update SSA form.
        * params.h (MAX_ALIASED_VOPS): Remove.
        (AVG_ALIASED_VOPS): Likewise.
        * omp-low.c (expand_omp_taskreg): Update SSA form.
        * tree-ssa-dse.c (dse_optimize_stmt): Properly query if the rhs
        aliases the lhs in a copy stmt.
        * tree-ssa-dse.c (struct address_walk_data): Remove.
        (memory_ssa_name_same): Likewise.
        (memory_address_same): Likewise.
        (get_kill_of_stmt_lhs): Likewise.
        (dse_possible_dead_store_p): Simplify, use the oracle.  Handle
        unused stores.  Look through PHI nodes into post-dominated regions.
        (dse_optimize_stmt): Simplify.  Properly remove stores.
        (tree_ssa_dse): Compute dominators.
        (execute_simple_dse): Remove.
        (pass_simple_dse): Likewise.
        * ipa-reference.c (scan_stmt_for_static_refs): Open-code
        gimple_loaded_syms and gimple_stored_syms computation.
        * toplev.c (dump_memory_report): Dump alias and pta stats.
        * tree-ssa-sccvn.c (vn_reference_compute_hash): Simplify.
        (vn_reference_eq): Likewise.
        (vuses_to_vec, copy_vuses_from_stmt, vdefs_to_vec,
        copy_vdefs_from_stmt, shared_lookup_vops, shared_vuses_from_stmt,
        valueize_vuses): Remove.
        (get_def_ref_stmt_vuses): Simplify.  Rename to ...
        (get_def_ref_stmt_vuse): ... this.
        (vn_reference_lookup_2): New function.
        (vn_reference_lookup_pieces): Use walk_non_aliased_vuses for
        walking equivalent vuses.  Simplify.
        (vn_reference_lookup): Likewise.
        (vn_reference_insert): Likewise.
        (vn_reference_insert_pieces): Likewise.
        (visit_reference_op_call): Simplify.
        (visit_reference_op_load): Likewise.
        (visit_reference_op_store): Likewise.
        (init_scc_vn): Remove shared_lookup_vuses initialization.
        (free_scc_vn): Remove shared_lookup_vuses freeing.
        (sort_vuses, sort_vuses_heap): Remove.
        (get_ref_from_reference_ops): Export.
        * tree-ssa-sccvn.h (struct vn_reference_s): Replace vuses
        vector with single vuse pointer.
        (vn_reference_lookup_pieces, vn_reference_lookup,
        vn_reference_insert, vn_reference_insert_pieces): Adjust prototypes.
        (shared_vuses_from_stmt): Remove.
        (get_ref_from_reference_ops): Declare.
        * tree-ssa-loop-manip.c (slpeel_can_duplicate_loop_p): Adjust.
        * tree-ssa-copyrename.c (copy_rename_partition_coalesce): Remove
        memory-tag related code.
        * tree-ssa-ccp.c (get_symbol_constant_value): Remove memory-tag code.
        (likely_value): Add comment, skip static-chain of call statements.
        (surely_varying_stmt_p): Adjust.
        (gimplify_and_update_call_from_tree): Likewise.
        (execute_fold_all_builtins): Do not rebuild alias info.
        (gimplify_and_update_call_from_tree): Properly update VOPs.
        * tree-ssa-loop-ivopts.c (get_ref_tag): Remove.
        (copy_ref_info): Remove memory-tag related code.
        * tree-call-cdce.c (tree_call_cdce): Rename the VOP.
        * ipa-pure-const.c (check_decl): Remove memory-tag related code.
        (check_stmt): Open-code gimple_loaded_syms and gimple_stored_syms
        computation.
        * tree-ssa-dom.c (gimple_p): Remove typedef.
        (eliminate_redundant_computations): Adjust.
        (record_equivalences_from_stmt): Likewise.
        (avail_expr_hash): Likewise.
        (avail_expr_eq): Likewise.
        * tree-ssa-propagate.c (update_call_from_tree): Properly
        update VOPs.
        (stmt_makes_single_load): Likewise.
        (stmt_makes_single_store): Likewise.
        * tree-ssa-alias.c: Rewrite completely.
        (debug_memory_partitions, dump_mem_ref_stats, debug_mem_ref_stats,
        debug_mem_sym_stats, dump_mem_sym_stats_for_var,
        debug_all_mem_sym_stats, debug_mp_info, update_mem_sym_stats_from_stmt,
        delete_mem_ref_stats, create_tag_raw, dump_points_to_info,
        dump_may_aliases_for, debug_may_aliases_for, new_type_alias):
        Remove public functions.
        (pass_reset_cc_flags): Remove.
        (pass_build_alias): Move ...
        * tree-ssa-structalias.c (pass_build_alias): ... here.
        * tree-ssa-alias.c (may_be_aliased): Move ...
        * tree-flow-inline.h (may_be_aliased): ... here.
        tree-ssa-alias.c (struct count_ptr_d, count_ptr_derefs,
        count_uses_and_derefs): Move ...
        * gimple.c: ... here.
        * gimple.h (count_uses_and_derefs): Declare.
        * tree-ssa-alias.c (dump_alias_stats, ptr_deref_may_alias_global_p,
        ptr_deref_may_alias_decl_p, ptr_derefs_may_alias_p,
        same_type_for_tbaa, nonaliasing_component_refs_p,
decl_refs_may_alias_p,
        indirect_ref_may_alias_decl_p, indirect_refs_may_alias_p,
        ref_maybe_used_by_call_p, ref_maybe_used_by_stmt_p,
        call_may_clobber_ref_p, stmt_may_clobber_ref_p, maybe_skip_until,
        get_continuation_for_phi, walk_non_aliased_vuses, walk_aliased_vdefs):
        New functions.
        * tree-dfa.c (refs_may_alias_p): Move ...
        * tree-ssa-alias.c (refs_may_alias_p): ... here.  Extend.
        * tree-ssa-alias.h: New file.
        * tree-ssa-sink.c (is_hidden_global_store): Adjust.
        (statement_sink_location): Likewise.
        * opts.c (decode_options): Do not adjust max-aliased-vops or
        avg-aliased-vops values.
        * timevar.def (TV_TREE_MAY_ALIAS): Remove.
        (TV_CALL_CLOBBER): Likewise.
        (TV_FLOW_SENSITIVE): Likewise.
        (TV_FLOW_INSENSITIVE): Likewise.
        (TV_MEMORY_PARTITIONING): Likewise.
        (TV_ALIAS_STMT_WALK): New timevar.
        * tree-ssa-loop-ivcanon.c (empty_loop_p): Adjust.
        * tree-ssa-address.c (create_mem_ref_raw): Use build6.
        (get_address_description): Remove memory-tag related code.
        * tree-ssa-ifcombine.c (bb_no_side_effects_p): Adjust.
        * treestruct.def (TS_MEMORY_TAG, TS_MEMORY_PARTITION_TAG): Remove.
        * tree-eh.c (cleanup_empty_eh): Do not leave stale SSA_NAMEs
        and immediate uses in statements.  Document.
        * gimple-pretty-print.c (dump_gimple_mem_ops): Adjust.
        (dump_symbols): Remove.
        (dump_gimple_mem_ops): Do not dump loaded or stored syms.
        * alias.c (get_deref_alias_set): New function split out from ...
        (get_alias_set): ... here.
        * alias.h (get_deref_alias_set): Declare.
        * tree-vect-data-refs.c (vect_create_data_ref_ptr): Remove unused
        type parameter.  Remove restrict pointer handling.  Create a
        ref-all pointer in case type-based alias sets do not conflict.
        (vect_analyze_data_refs): Remove SMT related code.
        * tree-vect-stmts.c (vectorizable_store): Re-instantiate TBAA assert.
        (vectorizable_load): Likewise.
        * tree-data-ref.h (struct dr_alias): Remove symbol_tag field.
        (DR_SYMBOL_TAG, DR_VOPS): Remove.
        * tree-data-ref.c (dr_may_alias_p): Use the alias-oracle.
        Ignore vops and SMTs.
        (dr_analyze_alias): Likewise..
        (free_data_ref): Likewise.
        (create_data_ref): Likewise.
        (analyze_all_data_dependences): Likewise.
        (get_references_in_stmt): Adjust.
        * tree-flow-inline.h (gimple_aliases_computed_p,
        gimple_addressable_vars, gimple_call_clobbered_vars,
        gimple_call_used_vars, gimple_global_var, may_aliases,
memory_partition,
        factoring_name_p, mark_call_clobbered, clear_call_clobbered,
        compare_ssa_operands_equal, symbol_mem_tag, set_symbol_mem_tag,
        gimple_mem_ref_stats): Remove.
        (gimple_vop): New function.
        (op_iter_next_use): Remove vuses and mayuses cases.
        (op_iter_next_def): Remove vdefs case.
        (op_iter_next_tree): Remove vuses, mayuses and vdefs cases.
        (clear_and_done_ssa_iter): Do not set removed fields.
        (op_iter_init): Likewise.  Skip vuse and/or vdef if requested.
        Assert we are not iterating over vuses or vdefs if not also
        iterating over uses or defs.
        (op_iter_init_use): Likewise.
        (op_iter_init_def): Likewise.
        (op_iter_next_vdef): Remove.
        (op_iter_next_mustdef): Likewise.
        (op_iter_init_vdef): Likewise.
        (compare_ssa_operands_equal): Likewise.
        (link_use_stmts_after): Handle vuse operand.
        (is_call_used): Use is_call_clobbered.
        (is_call_clobbered): Global variables are always call clobbered,
        query the call-clobbers bitmap.
        (mark_call_clobbered): Ignore global variables.
        (clear_call_clobbered): Likewise.
        * tree-ssa-coalesce.c (create_outofssa_var_map): Adjust
        virtual operands sanity check.
        * tree.def (NAME_MEMORY_TAG, SYMBOL_MEMORY_TAG, MEMORY_PARTITION_TAG):
        Remove.
        (TARGET_MEM_REF): Remove TMR_TAG operand.
        * tree-dfa.c (add_referenced_var): Initialize call-clobber state.
        Remove call-clobber related code.
        (remove_referenced_var): Likewise.  Do not clear mpt or symbol_mem_tag.
        (dump_variable): Do not dump SMTs, memory stats, may-aliases or
        partitions or escape reason.
        (get_single_def_stmt, get_single_def_stmt_from_phi,
        get_single_def_stmt_with_phi): Remove.
        (dump_referenced_vars): Tidy.
        (get_ref_base_and_extent): Allow bare decls.
        (collect_dfa_stats): Adjust.
        * graphite.c (rename_variables_in_stmt): Adjust.
        (graphite_copy_stmts_from_block): Likewise.
        (translate_clast): Likewise.
        * tree-ssa-pre.c (struct bb_bitmap_sets): Add expr_dies bitmap.
        (EXPR_DIES): New.
        (translate_vuse_through_block): Use the oracle.
        (phi_translate_1): Adjust.
        (value_dies_in_block_x): Use the oracle.  Cache the outcome
        in EXPR_DIES.
        (valid_in_sets): Check if the VUSE for
        a REFERENCE is available.
        (eliminate): Do not remove stmts during elimination,
        instead queue and remove them afterwards.
        (do_pre): Do not rebuild alias info.
        (pass_pre): Run TODO_rebuild_alias before PRE.
        * tree-ssa-live.c (remove_unused_locals): Remove memory-tag code.
        * tree-sra.c (sra_walk_function): Use gimple_references_memory_p.
        (mark_all_v_defs_stmt): Remove.
        (mark_all_v_defs_seq): Adjust.
        (sra_replace): Likewise.
        (scalarize_use): Likewise.
        (scalarize_copy): Likewise.
        (scalarize_init): Likewise.
        (scalarize_ldst): Likewise.
        (todoflags): Remove.
        (tree_sra): Do not rebuild alias info.
        (tree_sra_early): Adjust.
        (pass_sra): Run TODO_update_address_taken before SRA.
        * tree-predcom.c (set_alias_info): Remove.
        (prepare_initializers_chain): Do not call it.
        (mark_virtual_ops_for_renaming): Adjust.
        (mark_virtual_ops_for_renaming_list): Remove.
        (initialize_root_vars): Adjust.
        (initialize_root_vars_lm): Likewise.
        (prepare_initializers_chain): Likewise.
        * tree-ssa-copy.c (may_propagate_copy): Remove memory-tag related code.
        (may_propagate_copy_into_stmt): Likewise.
        (merge_alias_info): Do nothing for now.
        (propagate_tree_value_into_stmt): Adjust.
        (stmt_may_generate_copy): Likewise.
        * tree-ssa-forwprop.c (tidy_after_forward_propagate_addr): Do
        not mark symbols for renaming.
        (forward_propagate_addr_expr): Match up push/pop_stmt_changes
        with the same statement, make sure to update the new pointed-to one.
        * tree-ssa-dce.c (eliminate_unnecessary_stmts): Do not copy
        call statements, do not mark symbols for renaming.
        (mark_operand_necessary): Dump something.
        (ref_may_be_aliased): New function.
        (mark_aliased_reaching_defs_necessary_1): New helper function.
        (mark_aliased_reaching_defs_necessary): Likewise.
        (mark_all_reaching_defs_necessary_1): Likewise.
        (mark_all_reaching_defs_necessary): Likewise.
        (propagate_necessity): Do not process virtual PHIs.  For
        non-aliased loads mark all reaching definitions as necessary.
        For aliased loads and stores mark the immediate dominating
        aliased clobbers as necessary.
        (visited): New global static.
        (perform_tree_ssa_dce): Free visited bitmap after propagating
        necessity.
        (remove_dead_phis): Perform simple dead virtual PHI removal.
        (remove_dead_stmt): Properly unlink virtual operands when
        removing stores.
        (eliminate_unnecessary_stmts): Schedule PHI removal after
        stmt removal.
        * tree-ssa-ter.c (is_replaceable_p): Adjust.
        (process_replaceable): Likewise.
        (find_replaceable_in_bb): Likewise.
        * tree-ssa.c (verify_ssa_name): Verify all VOPs are
        based on the single gimple vop.
        (verify_flow_insensitive_alias_info): Remove.
        (verify_flow_sensitive_alias_info): Likewise.
        (verify_call_clobbering): Likewise.
        (verify_memory_partitions): Likewise.
        (verify_alias_info): Likewise.
        (verify_ssa): Adjust..
        (execute_update_addresses_taken): Export.  Update SSA
        manually.  Optimize only when optimizing.  Use a local bitmap.
        (pass_update_address_taken): Remove TODO_update_ssa, add
        TODO_dump_func.
        (pass_update_address_taken): Just use TODO_update_address_taken.
        (init_tree_ssa): Do not initialize addressable_vars.
        (verify_ssa): Verify new VUSE / VDEF properties.
        Verify that all stmts definitions have the stmt as SSA_NAME_DEF_STMT.
        Do not call verify_alias_info.
        (delete_tree_ssa): Clear the VUSE, VDEF operands.
        Do not free the loaded and stored syms bitmaps.  Reset the escaped
        and callused solutions.  Do not free addressable_vars.
        Remove memory-tag related code.
        (warn_uninitialized_var): Aliases are always available.
        * tree-ssa-loop-prefetch.c (gather_memory_references): Adjust.
        * lambda-code.c (can_put_in_inner_loop): Adjust.
        (can_put_after_inner_loop): Likewise.
        (perfect_nestify): Likewise.
        * tree-vect-stmts.c (vect_stmt_relevant_p): Adjust.
        (vect_gen_widened_results_half): Remove CALL_EXPR handling.
        (vectorizable_conversion): Do not mark symbols for renaming.
        * tree-inline.c (remap_gimple_stmt): Clear VUSE/VDEF.
        (expand_call_inline): Unlink the calls virtual operands before
        replacing it.
        (tree_function_versioning): Do not call update_ssa if we are not
        updating clones.  Simplify.
        * tree-ssa-phiprop.c (phivn_valid_p): Adjust.
        (propagate_with_phi): Likewise..
        * tree-outof-ssa.c (create_temp): Remove memory tag and call
        clobber code.  Assert we are not aliased or global.
        * tree-flow.h: Include tree-ssa-alias.h
        (enum escape_type): Remove.
        (struct mem_sym_stats_d): Likewise.
        (struct mem_ref_stats_d): Likewise.
        (struct gimple_df): Add vop member.  Remove global_var,
        call_clobbered_vars, call_used_vars, addressable_vars,
        aliases_compted_p and mem_ref_stats members.  Add syms_to_rename,
        escaped and callused members.
        (struct ptr_info_def): Remove all members, add points-to solution
        member pt.
        (struct var_ann_d): Remove in_vuse_list, in_vdef_list,
        call_clobbered, escape_mask, mpt and symbol_mem_tag members.
        * Makefile.in (TREE_FLOW_H): Add tree-ssa-alias.h.
        (tree-ssa-structalias.o): Remove tree-ssa-structalias.h.
        (tree-ssa-alias.o): Likewise.
        (toplev.o): Add tree-ssa-alias.h
        (GTFILES): Remove tree-ssa-structalias.h, add tree-ssa-alias.h.
        * gimple.c (gimple_set_bb): Fix off-by-one error.
        (is_gimple_reg): Do not handle memory tags.
        (gimple_copy): Also copy virtual operands.
        Delay updating the statement.  Do not reset loaded and stored syms.
        (gimple_set_stored_syms): Remove.
        (gimple_set_loaded_syms): Likewise.
        (gimple_call_copy_skip_args): Copy the virtual operands
        and mark the new statement modified.
        * tree-ssa-structalias.c (may_alias_p): Remove.
        (set_uids_in_ptset): Take the alias set to prune with as
        parameter.  Fold in the alias test of may_alias_p.
        (compute_points_to_sets): Compute whether a ptr is dereferenced
        in a local sbitmap.
        (process_constraint): Deal with &ANYTHING on the lhs, reject all
        other ADDRESSOF constraints on the lhs.
        (get_constraint_for_component_ref): Assert that we don't get
        ADDRESSOF constraints from the base of the reference.
        Properly generate UNKNOWN_OFFSET for DEREF if needed.
        (struct variable_info): Remove collapsed_to member.
        (get_varinfo_fc): Remove.
        (new_var_info): Do not set collapsed_to.
        (dump_constraint): Do not follow cycles.
        (dump_constraint_graph): Likewise.
        (build_pred_graph): Likewise.
        (build_succ_graph): Likewise.
        (rewrite_constraints): Likewise.
        (do_simple_structure_copy): Remove.
        (do_rhs_deref_structure_copy): Remove.
        (do_lhs_deref_structure_copy): Remove.
        (collapse_rest_of_var): Remove.
        (do_structure_copy): Re-implement.
        (pta_stats): New global variable.
        (dump_pta_stats): New function.
        (struct constraint_expr): Make offset signed.
        (UNKNOWN_OFFSET): Define special value.
        (dump_constraint): Dump UNKNOWN_OFFSET as UNKNOWN.
        (solution_set_expand): New helper function split out from ...
        (do_sd_constraint): ... here.
        (solution_set_add): Handle UNKNOWN_OFFSET.  Handle negative offsets.
        (do_ds_constraint): Likewise.
        (do_sd_constraint): Likewise.  Do not special-case ESCAPED = *ESCAPED
        and CALLUSED = *CALLUSED.
        (set_union_with_increment): Make inc argument signed.
        (type_safe): Remove.
        (get_constraint_for_ptr_offset): Handle unknown and negative
        constant offsets.
        (first_vi_for_offset): Handle offsets before start.  Bail
        out early for offsets beyond the variable extent.
        (first_or_preceding_vi_for_offset): New function.
        (init_base_vars): Add ESCAPED = ESCAPED + UNKNOWN_OFFSET constraint.
        Together with ESCAPED = *ESCAPED this properly computes reachability.
        (find_what_var_points_to): New function.
        (find_what_p_points_to): Implement in terms of find_what_var_points_to.
        (pt_solution_reset, pt_solution_empty_p, pt_solution_includes_global,
        pt_solution_includes_1, pt_solution_includes, pt_solutions_intersect_1,
        pt_solutions_intersect): New functions.
        (compute_call_used_vars): Remove.
        (compute_may_aliases): New main entry into PTA computation.
        * gimple.h (gimple_p): New typedef.
        (struct gimple_statement_base): Remove references_memory_p.
        (struct gimple_statement_with_memory_ops_base): Remove
        vdef_ops, vuse_ops, stores and loads members.  Add vdef and vuse
        members.
        (gimple_vuse_ops, gimple_set_vuse_ops, gimple_vdef_ops,
        gimple_set_vdef_ops, gimple_loaded_syms, gimple_stored_syms,
        gimple_set_references_memory): Remove.
        (gimple_vuse_op, gimple_vdef_op, gimple_vuse, gimple_vdef,
        gimple_vuse_ptr, gimple_vdef_ptri, gimple_set_vuse, gimple_set_vdef):
        New functions.
        * tree-cfg.c (move_block_to_fn): Fix off-by-one error.
        (verify_expr): Allow RESULT_DECL.
        (gimple_duplicate_bb): Do not copy virtual operands.
        (gimple_duplicate_sese_region): Adjust.
        (gimple_duplicate_sese_tail): Likewise.
        (mark_virtual_ops_in_region): Remove.
        (move_sese_region_to_fn): Do not call it.
        * passes.c (init_optimization_passes): Remove pass_reset_cc_flags
        and pass_simple_dse.
        (execute_function_todo): Handle TODO_update_address_taken,
        call execute_update_addresses_taken for TODO_rebuild_alias.
        (execute_todo): Adjust.
        (execute_one_pass): Init dump files early.
        * ipa-struct-reorg.c (finalize_var_creation): Do not mark vars
        call-clobbered.
        (create_general_new_stmt): Clear vops.
        * tree-ssa-reassoc.c (get_rank): Adjust.
        * tree-vect-slp.c (vect_create_mask_and_perm): Do not mark
        symbols for renaming.
        * params.def (PARAM_MAX_ALIASED_VOPS): Remove.
        (PARAM_AVG_ALIASED_VOPS): Likewise.
        * tree-ssanames.c (init_ssanames): Allocate SYMS_TO_RENAME.
        (duplicate_ssa_name_ptr_info): No need to copy the shared bitmaps.
        * tree-ssa-operands.c: Simplify for new virtual operand
        representation.
        (operand_build_cmp, copy_virtual_operands,
        create_ssa_artificial_load_stmt, add_to_addressable_set,
        gimple_add_to_addresses_taken): Remove public functions.
        (unlink_stmt_vdef): New function.

        * gcc.dg/pr19633-1.c: Adjust.
        * gcc.dg/torture/pta-callused-1.c: Likewise.
        * gcc.dg/torture/pr39074-2.c: Likewise.
        * gcc.dg/torture/pr39074.c: Likewise.
        * gcc.dg/torture/pta-ptrarith-3.c: New testcase.
        * gcc.dg/torture/pr30375.c: Adjust.
        * gcc.dg/torture/pr33563.c: Likewise.
        * gcc.dg/torture/pr33870.c: Likewise.
        * gcc.dg/torture/pr33560.c: Likewise.
        * gcc.dg/torture/pta-structcopy-1.c: New testcase.
        * gcc.dg/torture/ssa-pta-fn-1.c: Likewise.
        * gcc.dg/tree-ssa/alias-15.c: Remove.
        * gcc.dg/tree-ssa/ssa-dce-4.c: New testcase.
        * gcc.dg/tree-ssa/pr26421.c: Adjust.
        * gcc.dg/tree-ssa/ssa-fre-10.c: XFAIL.
        * gcc.dg/tree-ssa/ssa-dce-5.c: New testcase.
        * gcc.dg/tree-ssa/pr23382.c: Adjust.
        * gcc.dg/tree-ssa/ssa-fre-20.c: New testcase.
        * gcc.dg/tree-ssa/alias-16.c: Adjust.
        * gcc.dg/tree-ssa/ssa-fre-13.c: Likewise.
        * gcc.dg/tree-ssa/ssa-fre-14.c: Likewise.
        * gcc.dg/tree-ssa/alias-18.c: Likewise.
        * gcc.dg/tree-ssa/ssa-fre-15.c: Likewise.
        * gcc.dg/tree-ssa/ssa-lim-3.c: Likewise.
        * gcc.dg/tree-ssa/alias-19.c: Likewise.
        * gcc.dg/tree-ssa/pta-ptrarith-1.c: New testcase.
        * gcc.dg/tree-ssa/pr13146.c: Likewise.
        * gcc.dg/tree-ssa/ssa-pre-23.c: Likewise.
        * gcc.dg/tree-ssa/pta-ptrarith-2.c: Likewise.
        * gcc.dg/tree-ssa/ssa-fre-18.c: Likewise.
        * gcc.dg/tree-ssa/ssa-pre-24.c: New XFAILed testcase.
        * gcc.dg/tree-ssa/ssa-fre-19.c: New testcase.
        * gcc.dg/tree-ssa/alias-20.c: Likewise.
        * gcc.dg/tree-ssa/ssa-dse-12.c: Likewise.
        * gcc.dg/tree-ssa/pr38895.c: Likewise.
        * gcc.dg/uninit-B.c: XFAIL.
        * gcc.dg/vect/no-vfa-vect-43.c: Adjust.
        * gcc.dg/uninit-pr19430.c: XFAIL.
        * g++.dg/tree-ssa/pr13146.C: New testcase.
        * g++.dg/opt/pr36187.C: Adjust.
        * g++.dg/torture/20090329-1.C: New testcase.

Added:
    trunk/gcc/testsuite/g++.dg/torture/20090329-1.C
      - copied unchanged from r145492,
branches/alias-improvements/gcc/testsuite/g++.dg/torture/20090329-1.C
    trunk/gcc/testsuite/g++.dg/tree-ssa/pr13146.C
      - copied unchanged from r145492,
branches/alias-improvements/gcc/testsuite/g++.dg/tree-ssa/pr13146.C
    trunk/gcc/testsuite/gcc.dg/torture/pta-ptrarith-3.c
      - copied unchanged from r145492,
branches/alias-improvements/gcc/testsuite/gcc.dg/torture/pta-ptrarith-3.c
    trunk/gcc/testsuite/gcc.dg/torture/pta-structcopy-1.c
      - copied unchanged from r145492,
branches/alias-improvements/gcc/testsuite/gcc.dg/torture/pta-structcopy-1.c
    trunk/gcc/testsuite/gcc.dg/torture/ssa-pta-fn-1.c
      - copied unchanged from r145492,
branches/alias-improvements/gcc/testsuite/gcc.dg/torture/ssa-pta-fn-1.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/alias-20.c
      - copied unchanged from r145492,
branches/alias-improvements/gcc/testsuite/gcc.dg/tree-ssa/alias-20.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr13146.c
      - copied unchanged from r145492,
branches/alias-improvements/gcc/testsuite/gcc.dg/tree-ssa/pr13146.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr38895.c
      - copied unchanged from r145492,
branches/alias-improvements/gcc/testsuite/gcc.dg/tree-ssa/pr38895.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pta-ptrarith-1.c
      - copied unchanged from r145492,
branches/alias-improvements/gcc/testsuite/gcc.dg/tree-ssa/pta-ptrarith-1.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pta-ptrarith-2.c
      - copied unchanged from r145492,
branches/alias-improvements/gcc/testsuite/gcc.dg/tree-ssa/pta-ptrarith-2.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-dce-4.c
      - copied unchanged from r145492,
branches/alias-improvements/gcc/testsuite/gcc.dg/tree-ssa/ssa-dce-4.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-dce-5.c
      - copied unchanged from r145492,
branches/alias-improvements/gcc/testsuite/gcc.dg/tree-ssa/ssa-dce-5.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-12.c
      - copied unchanged from r145492,
branches/alias-improvements/gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-12.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-18.c
      - copied unchanged from r145492,
branches/alias-improvements/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-18.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-19.c
      - copied unchanged from r145492,
branches/alias-improvements/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-19.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-20.c
      - copied unchanged from r145492,
branches/alias-improvements/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-20.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-23.c
      - copied unchanged from r145492,
branches/alias-improvements/gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-23.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-24.c
      - copied unchanged from r145492,
branches/alias-improvements/gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-24.c
    trunk/gcc/tree-ssa-alias.h
      - copied unchanged from r145492,
branches/alias-improvements/gcc/tree-ssa-alias.h
Removed:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/alias-15.c
    trunk/gcc/tree-ssa-structalias.h
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/Makefile.in
    trunk/gcc/alias.c
    trunk/gcc/alias.h
    trunk/gcc/doc/invoke.texi
    trunk/gcc/doc/tree-ssa.texi
    trunk/gcc/gimple-pretty-print.c
    trunk/gcc/gimple.c
    trunk/gcc/gimple.h
    trunk/gcc/graphite.c
    trunk/gcc/ipa-cp.c
    trunk/gcc/ipa-pure-const.c
    trunk/gcc/ipa-reference.c
    trunk/gcc/ipa-struct-reorg.c
    trunk/gcc/lambda-code.c
    trunk/gcc/omp-low.c
    trunk/gcc/opts.c
    trunk/gcc/params.def
    trunk/gcc/params.h
    trunk/gcc/passes.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/opt/pr36187.C
    trunk/gcc/testsuite/gcc.dg/pr19633-1.c
    trunk/gcc/testsuite/gcc.dg/torture/pr30375.c
    trunk/gcc/testsuite/gcc.dg/torture/pr33560.c
    trunk/gcc/testsuite/gcc.dg/torture/pr33563.c
    trunk/gcc/testsuite/gcc.dg/torture/pr33870.c
    trunk/gcc/testsuite/gcc.dg/torture/pr39074-2.c
    trunk/gcc/testsuite/gcc.dg/torture/pr39074.c
    trunk/gcc/testsuite/gcc.dg/torture/pta-callused-1.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/alias-16.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/alias-18.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/alias-19.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr23382.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr26421.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-10.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-13.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-14.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-15.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-lim-3.c
    trunk/gcc/testsuite/gcc.dg/uninit-B.c
    trunk/gcc/testsuite/gcc.dg/uninit-pr19430.c
    trunk/gcc/testsuite/gcc.dg/vect/no-vfa-vect-43.c
    trunk/gcc/timevar.def
    trunk/gcc/toplev.c
    trunk/gcc/tree-call-cdce.c
    trunk/gcc/tree-cfg.c
    trunk/gcc/tree-complex.c
    trunk/gcc/tree-data-ref.c
    trunk/gcc/tree-data-ref.h
    trunk/gcc/tree-dfa.c
    trunk/gcc/tree-dump.c
    trunk/gcc/tree-eh.c
    trunk/gcc/tree-flow-inline.h
    trunk/gcc/tree-flow.h
    trunk/gcc/tree-inline.c
    trunk/gcc/tree-into-ssa.c
    trunk/gcc/tree-loop-distribution.c
    trunk/gcc/tree-outof-ssa.c
    trunk/gcc/tree-pass.h
    trunk/gcc/tree-predcom.c
    trunk/gcc/tree-pretty-print.c
    trunk/gcc/tree-sra.c
    trunk/gcc/tree-ssa-address.c
    trunk/gcc/tree-ssa-alias.c
    trunk/gcc/tree-ssa-ccp.c
    trunk/gcc/tree-ssa-coalesce.c
    trunk/gcc/tree-ssa-copy.c
    trunk/gcc/tree-ssa-copyrename.c
    trunk/gcc/tree-ssa-dce.c
    trunk/gcc/tree-ssa-dom.c
    trunk/gcc/tree-ssa-dse.c
    trunk/gcc/tree-ssa-forwprop.c
    trunk/gcc/tree-ssa-ifcombine.c
    trunk/gcc/tree-ssa-live.c
    trunk/gcc/tree-ssa-loop-im.c
    trunk/gcc/tree-ssa-loop-ivcanon.c
    trunk/gcc/tree-ssa-loop-ivopts.c
    trunk/gcc/tree-ssa-loop-niter.c
    trunk/gcc/tree-ssa-loop-prefetch.c
    trunk/gcc/tree-ssa-operands.c
    trunk/gcc/tree-ssa-operands.h
    trunk/gcc/tree-ssa-phiprop.c
    trunk/gcc/tree-ssa-pre.c
    trunk/gcc/tree-ssa-propagate.c
    trunk/gcc/tree-ssa-reassoc.c
    trunk/gcc/tree-ssa-sccvn.c
    trunk/gcc/tree-ssa-sccvn.h
    trunk/gcc/tree-ssa-sink.c
    trunk/gcc/tree-ssa-structalias.c
    trunk/gcc/tree-ssa-ter.c
    trunk/gcc/tree-ssa.c
    trunk/gcc/tree-ssanames.c
    trunk/gcc/tree-tailcall.c
    trunk/gcc/tree-vect-data-refs.c
    trunk/gcc/tree-vect-loop-manip.c
    trunk/gcc/tree-vect-slp.c
    trunk/gcc/tree-vect-stmts.c
    trunk/gcc/tree-vectorizer.h
    trunk/gcc/tree-vrp.c
    trunk/gcc/tree.c
    trunk/gcc/tree.def
    trunk/gcc/tree.h
    trunk/gcc/treestruct.def


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13146

[Bug middle-end/13146] inheritance for nonoverlapping_component_refs_p

[rguenth at gcc dot gnu dot org]

------- Comment #15 from rguenth at gcc dot gnu dot org  2009-04-03 10:27 -------
Fixed.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13146