[Bug middle-end/37883] New: [graphite] ICE : in scan_tree_for_params, at graphite.c:2274

[Bug middle-end/37883] New: [graphite] ICE : in scan_tree_for_params, at graphite.c:2274

[mitul dot thakkar at amd dot com]

gcc -O3 -floop-block test_sort.c
test_sort.c: In function 'test_sort':
test_sort.c:2: internal compiler error: in scan_tree_for_params, at
graphite.c:2274
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

This was tested on the graphite branch. The reduced testcase is attached.

Thanks,
Mitul Thakkar.


-- 
           Summary: [graphite] ICE : in scan_tree_for_params, at
                    graphite.c:2274
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: mitul dot thakkar at amd dot com
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37883

[Bug middle-end/37883] [graphite] ICE : in scan_tree_for_params, at graphite.c:2274

[mitul dot thakkar at amd dot com]

------- Comment #1 from mitul dot thakkar at amd dot com  2008-10-21 16:10 -------
Created an attachment (id=16520)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16520&action=view)
Reduced Test Case


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37883

[Bug middle-end/37883] [graphite] ICE : in scan_tree_for_params, at graphite.c:2274

[grosser at gcc dot gnu dot org]

-- 

grosser at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2008-10-30 04:10:22
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37883

[Bug middle-end/37883] [graphite] ICE : in scan_tree_for_params, at graphite.c:2274

[grosser at gcc dot gnu dot org]

-- 

grosser at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |grosser at gcc dot gnu dot
                   |dot org                     |org
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2008-10-30 04:10:22         |2008-10-30 13:51:37
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37883

[Bug middle-end/37883] [graphite] ICE : in scan_tree_for_params, at graphite.c:2274

[grosser at gcc dot gnu dot org]

------- Comment #2 from grosser at gcc dot gnu dot org  2008-10-30 13:51 -------
Created an attachment (id=16588)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16588&action=view)
Add POINTER_PLUS_EXPR - Improvement?

It seems we miss the POINTER_PLUS_EXPR. In most cases in tree-scalar-evol.c and
tree-chrec.c it is handled like a PLUS_EXPR. If I add it, the test case passes
the front end, but fails again in gloog() with:
#0  0x089d919f in link_imm_use (linknode=0x29072c4c, def=0x20017) at
tree-flow-inline.h:323
#1  0x089d914e in set_ssa_use_from_ptr (use=0x29072c4c, val=0x20017) at
tree-flow-inline.h:342
#2  0x089d9097 in graphite_rename_variables_in_stmt (stmt=0x29060528,
map=0x8d8b040)
    at ../../../git/gcc/graphite.c:3512
#3  0x089d9b89 in graphite_rename_variables (bb=0x29060618, map=0x8d8b040)
    at ../../../git/gcc/graphite.c:3685
#4  0x089da177 in translate_clast (scop=0x8d321c0, context_loop=0x29100948,
stmt=0x8d8a350, 
    next_e=0x290c2988, ivstack=0xbfbfe880) at ../../../git/gcc/graphite.c:3816
#5  0x089d9fbd in translate_clast (scop=0x8d321c0, context_loop=0x29100948,
stmt=0x8d8a110, 
    next_e=0x290c25c8, ivstack=0xbfbfe880) at ../../../git/gcc/graphite.c:3781


I will have to think about the patch. Opinions?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37883

[Bug middle-end/37883] [graphite] ICE : in scan_tree_for_params, at graphite.c:2274

[grosser at gcc dot gnu dot org]

------- Comment #3 from grosser at gcc dot gnu dot org  2008-11-04 18:25 -------
It seems PLUS_EXPR and POINTER_PLUS_EXPR can really handled identically.
So I will like to commit this patch.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37883

Re: [Bug middle-end/37883] [graphite] ICE : in scan_tree_for_params, at graphite.c:2274

[Sebastian Pop]

> It seems PLUS_EXPR and POINTER_PLUS_EXPR can really handled identically.
> So I will like to commit this patch.

Yes they should be handled in the same way in this context.
Please install the patch.

Thanks,
Sebastian

[Bug middle-end/37883] [graphite] ICE : in scan_tree_for_params, at graphite.c:2274

[sebpop at gmail dot com]

------- Comment #4 from sebpop at gmail dot com  2008-11-04 23:34 -------
Subject: Re:  [graphite] ICE : in scan_tree_for_params, at graphite.c:2274

> It seems PLUS_EXPR and POINTER_PLUS_EXPR can really handled identically.
> So I will like to commit this patch.

Yes they should be handled in the same way in this context.
Please install the patch.

Thanks,
Sebastian


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37883

[Bug middle-end/37883] [graphite] ICE : in scan_tree_for_params, at graphite.c:2274

[grosser at gcc dot gnu dot org]

------- Comment #5 from grosser at gcc dot gnu dot org  2008-11-08 19:46 -------
Subject: Bug 37883

Author: grosser
Revision: 141599
Modified property: svn:log

Modified: svn:log at Sat Nov  8 19:46:18 2008
------------------------------------------------------------------------------
--- svn:log (original)
+++ svn:log Sat Nov  8 19:46:18 2008
@@ -1,5 +1,5 @@
 2008-11-05  Tobias Grosser  <grosser@fim.uni-passau.de>

-       PR middle-end/37833
+       PR middle-end/37883

        * graphite.c (scan_tree_for_params): Add POINTER_PLUS_EXPR.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37883

[Bug middle-end/37883] [graphite] ICE : in scan_tree_for_params, at graphite.c:2274

[grosser at gcc dot gnu dot org]

------- Comment #6 from grosser at gcc dot gnu dot org  2008-11-08 19:50 -------
Subject: Bug 37883

Author: grosser
Revision: 141600
Modified property: svn:log

Modified: svn:log at Sat Nov  8 19:50:32 2008
------------------------------------------------------------------------------
--- svn:log (original)
+++ svn:log Sat Nov  8 19:50:32 2008
@@ -1,5 +1,5 @@
 2008-11-05  Tobias Grosser  <grosser@fim.uni-passau.de>

-       PR middle-end/37833
+       PR middle-end/37883

        * graphite.c (scan_tree_for_params): Add POINTER_PLUS_EXPR.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37883

[Bug middle-end/37883] [graphite] ICE : in scan_tree_for_params, at graphite.c:2274

[spop at gcc dot gnu dot org]

------- Comment #7 from spop at gcc dot gnu dot org  2008-12-03 07:35 -------
Subject: Bug 37883

Author: spop
Date: Wed Dec  3 07:33:52 2008
New Revision: 142384

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=142384
Log:
2008-12-02  Sebastian Pop  <sebastian.pop@amd.com>
            Jan Sjodin  <jan.sjodin@amd.com>
            Harsha Jagasia  <harsha.jagasia@amd.com>

        PR middle-end/37852
        PR middle-end/37883
        PR middle-end/37928
        PR middle-end/37980
        PR middle-end/38038
        PR middle-end/38039
        PR middle-end/38073
        PR middle-end/38083
        PR middle-end/38125

        * testsuite/gcc.dg/graphite/pr38073.c: New.
        * testsuite/gcc.dg/graphite/pr37928.c: New.
        * testsuite/gcc.dg/graphite/pr37883.c: New.
        * testsuite/gcc.dg/graphite/pr38125.c: New.
        * testsuite/gfortran.dg/graphite/pr38083.f90: New.
        * testsuite/gfortran.dg/graphite/pr37852.f90: New.
        * testsuite/gfortran.dg/graphite/pr37980.f90: New.

        * testsuite/gcc.dg/graphite/scop-18.c: Remove reduction, test for
        the number of detected scops.  Copy exact same test for loop
blocking...
        * testsuite/gcc.dg/graphite/block-1.c: Fix the number of expected loops
        to be blocked as reductions are not handled.
        * testsuite/gcc.dg/graphite/block-4.c: ...here.  New.

        * tree-phinodes.c (remove_phi_nodes): New, extracted from...
        * tree-cfg.c (remove_phi_nodes_and_edges_for_unreachable_block):
...here.
        * tree-flow.h (remove_phi_nodes, canonicalize_loop_ivs): Declared.
        * Makefile.in (graphite.o): Depend on value-prof.h.
        (graphite.o-warn): Removed -Wno-error.
        * tree-parloops.c (canonicalize_loop_ivs): Allow reduction_list 
        to be a NULL pointer.  Call update_stmt.  Return the newly created 
        cannonical induction variable.

        * graphite.h (debug_rename_map): Declared.  Fix some comments.

        * graphite.c: Reimplement the code generation from graphite to gimple.
        Include value-prof.h.
        (loop_iv_stack_get_iv): Do not return NULL for constant substitutions.
        (get_old_iv_from_ssa_name): Removed.
        (graphite_stmt_p): New.
        (new_graphite_bb): Test for useful statements before building a
        graphite statement for the basic block.
        (free_graphite_bb): Do not free GBB_DATA_REFS: this is a bug
        in free_data_ref that calls BITMAP_FREE (DR_VOPS (dr)) without 
        reason.
        (recompute_all_dominators, graphite_verify,
        nb_reductions_in_loop, graphite_loop_normal_form): New.
        (scop_record_loop): Call graphite_loop_normal_form.
        (build_scop_loop_nests): Iterate over all the blocks of the
        function instead of relying on the incomplete information from
        SCOP_BBS.  Return the success of the operation.
        (find_params_in_bb): Use the data from GBB_DATA_REFS.
        (add_bb_domains): Removed.
        (build_loop_iteration_domains): Don't call add_bb_domains.
        Add the iteration domain only to the basic blocks that have been
        translated to graphite.
        (build_scop_conditions_1): Add constraints only if the basic
        block have been translated to graphite.
        (build_scop_data_accesses): Completely disabled until data
        dependence is correctly implemented.
        (debug_rename_elt, debug_rename_map_1, debug_rename_map): New.
        (remove_all_edges_1, remove_all_edges): Removed.
        (get_new_name_from_old_name): New.
        (graphite_rename_variables_in_stmt): Renamed 
        rename_variables_in_stmt.  Call get_new_name_from_old_name.
        Use replace_exp and update_stmt.
        (is_old_iv): Renamed is_iv.
        (expand_scalar_variables_stmt): Extra parameter for renaming map.
        Use replace_exp and update_stmt.
        (expand_scalar_variables_expr): Same.  Use the map to get the
        new names for the renaming of induction variables and for the
        renaming of variables after a basic block has been copied.
        (expand_scalar_variables): Same.
        (graphite_rename_variables): Renamed rename_variables.
        (move_phi_nodes): Removed.
        (get_false_edge_from_guard_bb): New.
        (build_iv_mapping): Do not insert the induction variable of a
        loop in the renaming iv map if the basic block does not belong
        to that loop.
        (register_old_new_names, graphite_copy_stmts_from_block,
        copy_bb_and_scalar_dependences): New.
        (translate_clast): Heavily reimplemented: copy basic blocks,
        do not move them.  Finally, in call cleanup_tree_cfg in gloog.
        At each translation step call graphite_verify ensuring the 
        consistency of the SSA, loops and dominators information.
        (collect_virtual_phis, find_vdef_for_var_in_bb,
        find_vdef_for_var_1, find_vdef_for_var,
        patch_phis_for_virtual_defs): Removed huge hack.
        (mark_old_loops, remove_dead_loops, skip_phi_defs,
        collect_scop_exit_phi_args, patch_scop_exit_phi_args,
        gbb_can_be_ignored, scop_remove_ignoreable_gbbs, ): Removed.
        (remove_sese_region, ifsese, if_region_entry, if_region_exit,
        if_region_get_condition_block, if_region_set_false_region,
        create_if_region_on_edge, move_sese_in_condition, bb_in_sese_p,
        sese_find_uses_to_rename_use, sese_find_uses_to_rename_bb, 
        sese_add_exit_phis_edge, sese_add_exit_phis_var,
        rewrite_into_sese_closed_ssa): New.
        (gloog): Remove dead code.  Early return if code cannot be
        generated.  Call cleanup_tree_cfg once the scop has been code
        generated.
        (graphite_trans_scop_block, graphite_trans_loop_block): Do not 
        block loops with less than two loops.
        (graphite_apply_transformations): Remove the call to
        scop_remove_ignoreable_gbbs.
        (limit_scops): When build_scop_loop_nests fails, continue on next scop.
        Fix open_scop.entry.
        (graphite_transform_loops): Call recompute_all_dominators: force the
        recomputation of correct CDI_DOMINATORS and CDI_POST_DOMINATORS.
        Call initialize_original_copy_tables and free_original_copy_tables
        to be able to copy basic blocks during code generation.
        When build_scop_loop_nests fails, continue on next scop.
        (value_clast): New union.
        (clast_to_gcc_expression): Fix type cast warning.


Added:
    branches/graphite/gcc/testsuite/gcc.dg/graphite/block-4.c
    branches/graphite/gcc/testsuite/gcc.dg/graphite/pr37883.c
    branches/graphite/gcc/testsuite/gcc.dg/graphite/pr37928.c
    branches/graphite/gcc/testsuite/gcc.dg/graphite/pr38073.c
    branches/graphite/gcc/testsuite/gcc.dg/graphite/pr38125.c
    branches/graphite/gcc/testsuite/gfortran.dg/graphite/pr37852.f90
    branches/graphite/gcc/testsuite/gfortran.dg/graphite/pr37980.f90
    branches/graphite/gcc/testsuite/gfortran.dg/graphite/pr38083.f90
Modified:
    branches/graphite/gcc/ChangeLog.graphite
    branches/graphite/gcc/Makefile.in
    branches/graphite/gcc/graphite.c
    branches/graphite/gcc/graphite.h
    branches/graphite/gcc/testsuite/gcc.dg/graphite/block-1.c
    branches/graphite/gcc/testsuite/gcc.dg/graphite/scop-18.c
    branches/graphite/gcc/tree-cfg.c
    branches/graphite/gcc/tree-flow.h
    branches/graphite/gcc/tree-parloops.c
    branches/graphite/gcc/tree-phinodes.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37883

[Bug middle-end/37883] [graphite] ICE : in scan_tree_for_params, at graphite.c:2274

[grosser at gcc dot gnu dot org]

------- Comment #8 from grosser at gcc dot gnu dot org  2008-12-08 20:11 -------
Fixed in branch and trunk.
Now fails in trunk on verify_ssa(). This is already solved in branch and will
be imported to trunk soon.

*** This bug has been marked as a duplicate of 37980 ***


-- 

grosser at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |DUPLICATE


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37883

[Bug middle-end/37883] [graphite] ICE : in scan_tree_for_params, at graphite.c:2274

[spop at gcc dot gnu dot org]

------- Comment #9 from spop at gcc dot gnu dot org  2008-12-11 07:24 -------
Subject: Bug 37883

Author: spop
Date: Thu Dec 11 07:23:02 2008
New Revision: 142673

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=142673
Log:
2008-12-11  Sebastian Pop  <sebastian.pop@amd.com>

        Fix testsuite/gfortran.dg/graphite/id-4.f90.
        * graphite.c (scan_tree_for_params): Do not compute the multiplicand
        when not needed.

2008-12-11  Sebastian Pop  <sebastian.pop@amd.com>

        * graphite.c (build_scops_1): Initialize open_scop.exit
        and sinfo.last.

2008-12-11  Sebastian Pop  <sebastian.pop@amd.com>
            Jan Sjodin  <jan.sjodin@amd.com>
            Harsha Jagasia  <harsha.jagasia@amd.com>

        PR middle-end/37852
        PR middle-end/37883
        PR middle-end/37928
        PR middle-end/37980
        PR middle-end/38038
        PR middle-end/38039
        PR middle-end/38073
        PR middle-end/38083
        PR middle-end/38125

        * tree-phinodes.c (remove_phi_nodes): New, extracted from...
        * tree-cfg.c (remove_phi_nodes_and_edges_for_unreachable_block):
...here.
        * tree-flow.h (remove_phi_nodes, canonicalize_loop_ivs): Declared.
        * Makefile.in (graphite.o): Depend on value-prof.h.
        (graphite.o-warn): Removed -Wno-error.
        * tree-parloops.c (canonicalize_loop_ivs): Allow reduction_list 
        to be a NULL pointer.  Call update_stmt.  Return the newly created 
        cannonical induction variable.

        * graphite.h (debug_rename_map): Declared.  Fix some comments.

        * graphite.c: Reimplement the code generation from graphite to gimple.
        Include value-prof.h.
        (loop_iv_stack_get_iv): Do not return NULL for constant substitutions.
        (get_old_iv_from_ssa_name): Removed.
        (graphite_stmt_p): New.
        (new_graphite_bb): Test for useful statements before building a
        graphite statement for the basic block.
        (free_graphite_bb): Do not free GBB_DATA_REFS: this is a bug
        in free_data_ref that calls BITMAP_FREE (DR_VOPS (dr)) without 
        reason.
        (recompute_all_dominators, graphite_verify,
        nb_reductions_in_loop, graphite_loop_normal_form): New.
        (scop_record_loop): Call graphite_loop_normal_form.
        (build_scop_loop_nests): Iterate over all the blocks of the
        function instead of relying on the incomplete information from
        SCOP_BBS.  Return the success of the operation.
        (find_params_in_bb): Use the data from GBB_DATA_REFS.
        (add_bb_domains): Removed.
        (build_loop_iteration_domains): Don't call add_bb_domains.
        Add the iteration domain only to the basic blocks that have been
        translated to graphite.
        (build_scop_conditions_1): Add constraints only if the basic
        block have been translated to graphite.
        (build_scop_data_accesses): Completely disabled until data
        dependence is correctly implemented.
        (debug_rename_elt, debug_rename_map_1, debug_rename_map): New.
        (remove_all_edges_1, remove_all_edges): Removed.
        (get_new_name_from_old_name): New.
        (graphite_rename_variables_in_stmt): Renamed 
        rename_variables_in_stmt.  Call get_new_name_from_old_name.
        Use replace_exp and update_stmt.
        (is_old_iv): Renamed is_iv.
        (expand_scalar_variables_stmt): Extra parameter for renaming map.
        Use replace_exp and update_stmt.
        (expand_scalar_variables_expr): Same.  Use the map to get the
        new names for the renaming of induction variables and for the
        renaming of variables after a basic block has been copied.
        (expand_scalar_variables): Same.
        (graphite_rename_variables): Renamed rename_variables.
        (move_phi_nodes): Removed.
        (get_false_edge_from_guard_bb): New.
        (build_iv_mapping): Do not insert the induction variable of a
        loop in the renaming iv map if the basic block does not belong
        to that loop.
        (register_old_new_names, graphite_copy_stmts_from_block,
        copy_bb_and_scalar_dependences): New.
        (translate_clast): Heavily reimplemented: copy basic blocks,
        do not move them.  Finally, in call cleanup_tree_cfg in gloog.
        At each translation step call graphite_verify ensuring the 
        consistency of the SSA, loops and dominators information.
        (collect_virtual_phis, find_vdef_for_var_in_bb,
        find_vdef_for_var_1, find_vdef_for_var,
        patch_phis_for_virtual_defs): Removed huge hack.
        (mark_old_loops, remove_dead_loops, skip_phi_defs,
        collect_scop_exit_phi_args, patch_scop_exit_phi_args,
        gbb_can_be_ignored, scop_remove_ignoreable_gbbs, ): Removed.
        (remove_sese_region, ifsese, if_region_entry, if_region_exit,
        if_region_get_condition_block, if_region_set_false_region,
        create_if_region_on_edge, move_sese_in_condition, bb_in_sese_p,
        sese_find_uses_to_rename_use, sese_find_uses_to_rename_bb, 
        sese_add_exit_phis_edge, sese_add_exit_phis_var,
        rewrite_into_sese_closed_ssa): New.
        (gloog): Remove dead code.  Early return if code cannot be
        generated.  Call cleanup_tree_cfg once the scop has been code
        generated.
        (graphite_trans_scop_block, graphite_trans_loop_block): Do not 
        block loops with less than two loops.
        (graphite_apply_transformations): Remove the call to
        scop_remove_ignoreable_gbbs.
        (limit_scops): When build_scop_loop_nests fails, continue on next scop.
        Fix open_scop.entry.
        (graphite_transform_loops): Call recompute_all_dominators: force the
        recomputation of correct CDI_DOMINATORS and CDI_POST_DOMINATORS.
        Call initialize_original_copy_tables and free_original_copy_tables
        to be able to copy basic blocks during code generation.
        When build_scop_loop_nests fails, continue on next scop.
        (value_clast): New union.
        (clast_to_gcc_expression): Fix type cast warning.

2008-12-11  Sebastian Pop  <sebastian.pop@amd.com>

        * gcc.dg/graphite/pr37928.c: New.
        * gcc.dg/graphite/pr37883.c: New.
        * gcc.dg/graphite/pr38073.c: New.
        * gcc.dg/graphite/pr38125.c: New.
        * gfortran.dg/graphite/pr38083.f90: New.
        * gfortran.dg/graphite/pr37852.f90: New.
        * gfortran.dg/graphite/pr37980.f90: New.
        * gfortran.dg/graphite/id-2.f90: New.
        * gfortran.dg/graphite/id-4.f90: New.

        * gcc.dg/graphite/scop-18.c: Remove reduction, test for
        the number of detected scops.  Copy exact same test for loop
blocking...
        * gcc.dg/graphite/block-1.c: Fix the number of expected loops
        to be blocked as reductions are not handled.
        * gcc.dg/graphite/block-4.c: ...here.  New.


Added:
    trunk/gcc/testsuite/gcc.dg/graphite/block-4.c
    trunk/gcc/testsuite/gcc.dg/graphite/pr37883.c
    trunk/gcc/testsuite/gcc.dg/graphite/pr37928.c
    trunk/gcc/testsuite/gcc.dg/graphite/pr38073.c
    trunk/gcc/testsuite/gcc.dg/graphite/pr38125.c
    trunk/gcc/testsuite/gfortran.dg/graphite/id-2.f90
    trunk/gcc/testsuite/gfortran.dg/graphite/id-4.f90
    trunk/gcc/testsuite/gfortran.dg/graphite/pr37852.f90
    trunk/gcc/testsuite/gfortran.dg/graphite/pr37980.f90
    trunk/gcc/testsuite/gfortran.dg/graphite/pr38083.f90
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/Makefile.in
    trunk/gcc/graphite.c
    trunk/gcc/graphite.h
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/graphite/block-1.c
    trunk/gcc/testsuite/gcc.dg/graphite/scop-18.c
    trunk/gcc/tree-cfg.c
    trunk/gcc/tree-flow.h
    trunk/gcc/tree-parloops.c
    trunk/gcc/tree-phinodes.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37883