[Bug tree-optimization/33856] New: [4.3 Regression] Segfault in create_data_ref/compute_data_dependences_for_loop

[Bug tree-optimization/33856] New: [4.3 Regression] Segfault in create_data_ref/compute_data_dependences_for_loop

[tbm at cyrius dot com]

Current trunk:

(sid)30104:tbm@em64t: ~] /usr/lib/gcc-snapshot/bin/gcc -c -O2 -ftree-vectorize
zapping-properties-handler.c
zapping-properties-handler.c: In function 'picture_sizes_load_default':
zapping-properties-handler.c:19: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.


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           Summary: [4.3 Regression] Segfault in
                    create_data_ref/compute_data_dependences_for_loop
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tbm at cyrius dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33856

[Bug tree-optimization/33856] [4.3 Regression] Segfault in create_data_ref/compute_data_dependences_for_loop

[tbm at cyrius dot com]

------- Comment #1 from tbm at cyrius dot com  2007-10-22 07:21 -------
Created an attachment (id=14387)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14387&action=view)
preprocessed source


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33856

[Bug tree-optimization/33856] [4.3 Regression] Segfault in create_data_ref/compute_data_dependences_for_loop

[tbm at cyrius dot com]

------- Comment #3 from tbm at cyrius dot com  2007-10-22 07:22 -------
Performing interprocedural optimizations
 <visibility> <early_local_cleanups> <inline> <static-var>
<pure-const>Assembling functions:
 picture_size_new picture_sizes_load_default
Program received signal SIGSEGV, Segmentation fault.
create_data_ref (nest=0x2b26f0017be0, memref=0x2b26ef7719c0, stmt=<value
optimized out>,
    is_read=1 '\001') at gcc/tree-data-ref.c:746
746       if (DECL_P (base))
(gdb) where
#0  create_data_ref (nest=0x2b26f0017be0, memref=0x2b26ef7719c0, stmt=<value
optimized out>,
    is_read=1 '\001') at gcc/tree-data-ref.c:746
#1  0x00000000006eb773 in compute_data_dependences_for_loop
(loop=0x2b26f0017be0,
    compute_self_and_read_read_dependences=1 '\001', datarefs=0xff4888,
    dependence_relations=0xff4890) at gcc/tree-data-ref.c:4015
#2  0x0000000000a9af4f in vect_analyze_loop (loop=0x2b26f0017be0)
    at gcc/tree-vect-analyze.c:3170
#3  0x000000000080bcd0 in vectorize_loops () at gcc/tree-vectorizer.c:2501
#4  0x000000000063f247 in execute_one_pass (pass=0xee2d00) at gcc/passes.c:1117
#5  0x000000000063f40c in execute_pass_list (pass=0xee2d00)
    at gcc/passes.c:1170
#6  0x000000000063f41e in execute_pass_list (pass=0xee2b20)
    at gcc/passes.c:1171
#7  0x000000000063f41e in execute_pass_list (pass=0xee1f20)
    at gcc/passes.c:1171
#8  0x0000000000717e0e in tree_rest_of_compilation (fndecl=0x2b26f012aa00)
    at gcc/tree-optimize.c:404
#9  0x000000000089adb2 in cgraph_expand_function (node=0x2b26f012ab00)
    at gcc/cgraphunit.c:1060
#10 0x000000000089c858 in cgraph_optimize () at gcc/cgraphunit.c:1123
#11 0x0000000000414d9e in c_write_global_declarations () at gcc/c-decl.c:8077
#12 0x00000000006bb0b7 in toplev_main (argc=<value optimized out>, argv=<value
optimized out>)
    at gcc/toplev.c:1055
#13 0x00002b26efcd3b44 in __libc_start_main () from /lib/libc.so.6
#14 0x00000000004043f9 in _start ()
(gdb)


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33856

[Bug tree-optimization/33856] [4.3 Regression] Segfault in create_data_ref/compute_data_dependences_for_loop

[tbm at cyrius dot com]

------- Comment #4 from tbm at cyrius dot com  2007-10-22 07:22 -------
This didn't happen with trunk from 20070916.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33856

[Bug tree-optimization/33856] [4.3 Regression] Segfault in create_data_ref/compute_data_dependences_for_loop

[tbm at cyrius dot com]

------- Comment #2 from tbm at cyrius dot com  2007-10-22 07:22 -------
/* Testcase by Martin Michlmayr <tbm@cyrius.com> */

typedef struct z_key
{
  int key;
  int mask;
} z_key;
typedef struct picture_size
{
  z_key key;
}
picture_size;
void picture_size_new (picture_size *ps)
{
  z_key key;
  ps->key = key;
}
void picture_sizes_load_default (picture_size *ps)
{
  int i;
  for (i = 0; i < 5; ++i)
    picture_size_new (ps);
}


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33856

[Bug tree-optimization/33856] [4.3 Regression] Segfault in create_data_ref/compute_data_dependences_for_loop

[pinskia at gcc dot gnu dot org]

-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at gcc dot gnu dot
                   |                            |org
   Target Milestone|---                         |4.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33856

[Bug tree-optimization/33856] [4.3 Regression] Segfault in create_data_ref/compute_data_dependences_for_loop

[irar at il dot ibm dot com]

------- Comment #5 from irar at il dot ibm dot com  2007-10-22 11:52 -------
For the data ref in the testcase, VIEW_CONVERT_EXPR<struct z_key>(0),
get_base_address() (in dr_analyze_alias) returns NULL, which causes the
segfault. 

Ira


-- 

irar at il dot ibm dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |irar at il dot ibm dot com
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2007-10-22 11:52:43
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33856

[Bug tree-optimization/33856] [4.3 Regression] Segfault in create_data_ref/compute_data_dependences_for_loop

[jakub at gcc dot gnu dot org]

------- Comment #6 from jakub at gcc dot gnu dot org  2007-10-27 13:29 -------
Testing a patch.


-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jakub at gcc dot gnu dot org
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2007-10-22 11:52:43         |2007-10-27 13:29:28
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33856

[Bug tree-optimization/33856] [4.3 Regression] Segfault in create_data_ref/compute_data_dependences_for_loop

[mmitchel at gcc dot gnu dot org]

-- 

mmitchel at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33856

[Bug tree-optimization/33856] [4.3 Regression] Segfault in create_data_ref/compute_data_dependences_for_loop

[jakub at gcc dot gnu dot org]

------- Comment #7 from jakub at gcc dot gnu dot org  2007-11-05 08:44 -------
Subject: Bug 33856

Author: jakub
Date: Mon Nov  5 08:44:23 2007
New Revision: 129897

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=129897
Log:
        PR tree-optimization/33856
        * tree-data-ref.c (get_references_in_stmt): Don't add
        REFERENCE_CLASS_P trees to references vector if get_base_address
        returns NULL on them.

        * gcc.c-torture/compile/20071027-1.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/20071027-1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-data-ref.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33856

[Bug tree-optimization/33856] [4.3 Regression] Segfault in create_data_ref/compute_data_dependences_for_loop

[jakub at gcc dot gnu dot org]

------- Comment #8 from jakub at gcc dot gnu dot org  2007-11-05 08:46 -------
Fixed.


-- 

jakub at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33856

[Bug tree-optimization/33856] [4.3 Regression] Segfault in create_data_ref/compute_data_dependences_for_loop

[rguenth at gcc dot gnu dot org]

------- Comment #9 from rguenth at gcc dot gnu dot org  2007-11-09 22:58 -------
*** Bug 34047 has been marked as a duplicate of this bug. ***


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rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dcb314 at hotmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33856