[Bug c/41956] New: Segmentation fault when called by mpicc

[Bug c/41956] New: Segmentation fault when called by mpicc

[andrew_newell at ncsu dot edu]

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This problem occurs when compiling part of ParMetis-3.1:

/usr/bin/mpicc -save-temps -O3  -I. -I/opt/local/include -I/usr/include/malloc
-c node_refine.c
node_refine.c: In function ‘KWayNodeRefine__’:
node_refine.c:114:6: internal compiler error: Segmentation fault


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           Summary: Segmentation fault when called by mpicc
           Product: gcc
           Version: 4.2.1
            Status: UNCONFIRMED
          Severity: critical
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: andrew_newell at ncsu dot edu
 GCC build triplet: x86_64-apple-darwin10
  GCC host triplet: x86_64-apple-darwin10


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41956

[Bug c/41956] Segmentation fault when called by mpicc

[andrew_newell at ncsu dot edu]

------- Comment #1 from andrew_newell at ncsu dot edu  2009-11-05 20:34 -------
Created an attachment (id=18977)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18977&action=view)
Preprocessed file


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41956

[Bug c/41956] Segmentation fault when called by mpicc

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2009-11-05 20:35 -------
Can you provide the output of gcc -v ?


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|critical                    |normal


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41956

[Bug middle-end/41956] Segmentation fault when called by mpicc

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2009-11-05 20:39 -------

Using built-in specs.
Target: x86_64-apple-darwin10
Configured with: ../gcc-4.5-20090910/configure --enable-languages=fortran,c++
--host=x86_64-apple-darwin10 --build=x86_64-apple-darwin10
Thread model: posix
gcc version 4.5.0 20090910 (experimental) (GCC) 


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|c                           |middle-end
 GCC target triplet|                            |x86_64-apple-darwin10
            Version|4.2.1                       |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41956

[Bug middle-end/41956] Segmentation fault when called by mpicc

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2009-11-05 20:40 -------
This is likely a dup of bug 41891.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41956

[Bug middle-end/41956] Segmentation fault when called by mpicc

[rguenth at gcc dot gnu dot org]

------- Comment #5 from rguenth at gcc dot gnu dot org  2009-11-06 10:06 -------
hm, works for me.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41956

[Bug middle-end/41956] Segmentation fault when called by mpicc

[fxcoudert at gcc dot gnu dot org]

------- Comment #6 from fxcoudert at gcc dot gnu dot org  2009-12-29 17:42 -------
I can confirm the segfault at -O3 with current trunk (rev. 155505) on
x86_64-apple-darwin10.2.0. I also generated a (much) reduced testcase:


void K (int *gpwgts, int *badminpwgt, int *badmaxpwgt)
{
  int i;
  for (i = 0; i < 10; i += 2) {
    badminpwgt[i] = badminpwgt[i+1] = gpwgts[i]+gpwgts[i];
    badmaxpwgt[i] = badmaxpwgt[i+1] = gpwgts[i]+gpwgts[i];
  }
}



 The segfault backtrace is:

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: 13 at address: 0x0000000000000000
vect_analyze_slp (loop_vinfo=<value temporarily unavailable, due to
optimizations>, bb_vinfo=<value temporarily unavailable, due to optimizations>)
at gimple.h:33
33      DEF_VEC_P(gimple);
(gdb) bt
#0  vect_analyze_slp (loop_vinfo=<value temporarily unavailable, due to
optimizations>, bb_vinfo=<value temporarily unavailable, due to optimizations>)
at gimple.h:33
#1  0x00000001007bce67 in vect_analyze_loop (loop=<value temporarily
unavailable, due to optimizations>) at ../../trunk/gcc/tree-vect-loop.c:1433
#2  0x00000001007ca08a in vectorize_loops () at
../../trunk/gcc/tree-vectorizer.c:219
#3  0x000000010058d7ae in execute_one_pass (pass=0x100c3ca00) at
../../trunk/gcc/passes.c:1561
#4  0x000000010058da7d in execute_pass_list (pass=0x100c3ca00) at
../../trunk/gcc/passes.c:1616
#5  0x000000010058da8f in execute_pass_list (pass=0x100c3c820) at
../../trunk/gcc/passes.c:1617
#6  0x000000010058da8f in execute_pass_list (pass=0x100c3be60) at
../../trunk/gcc/passes.c:1617
#7  0x00000001006b86e8 in tree_rest_of_compilation (fndecl=0x141609900) at
../../trunk/gcc/tree-optimize.c:413
#8  0x00000001008731e3 in cgraph_expand_function (node=<value temporarily
unavailable, due to optimizations>) at ../../trunk/gcc/cgraphunit.c:1544
#9  0x00000001008760da in cgraph_optimize () at
../../trunk/gcc/cgraphunit.c:1623
#10 0x00000001008766bd in cgraph_finalize_compilation_unit () at
../../trunk/gcc/cgraphunit.c:1093
#11 0x000000010001f2a2 in c_write_global_declarations () at
../../trunk/gcc/c-decl.c:9490
#12 0x000000010064e322 in toplev_main (argc=4, argv=0x7fff5fbff5d0) at
../../trunk/gcc/toplev.c:1061
#13 0x00000001000008b4 in start ()


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fxcoudert at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |fxcoudert at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |ice-on-valid-code
      Known to fail|                            |4.5.0
   Last reconfirmed|0000-00-00 00:00:00         |2009-12-29 17:42:02
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41956

[Bug middle-end/41956] Segfault in vectorizer

[irar at il dot ibm dot com]

------- Comment #7 from irar at il dot ibm dot com  2009-12-30 10:16 -------
The bug is in SLP load permutation analysis. I am testing a patch.


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irar at il dot ibm dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |irar at il dot ibm dot com
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2009-12-29 17:42:02         |2009-12-30 10:16:22
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41956

[Bug tree-optimization/41956] Segfault in vectorizer

[irar at gcc dot gnu dot org]

------- Comment #8 from irar at gcc dot gnu dot org  2009-12-30 12:53 -------
Subject: Bug 41956

Author: irar
Date: Wed Dec 30 12:53:18 2009
New Revision: 155523

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=155523
Log:

        PR tree-optimization/41956
        * tree-vect-slp.c (vect_supported_load_permutation_p): Add check that 
        the load indices differ.


Added:
    trunk/gcc/testsuite/gcc.dg/vect/pr41956.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-slp.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41956

[Bug tree-optimization/41956] Segfault in vectorizer

[fxcoudert at gcc dot gnu dot org]

------- Comment #9 from fxcoudert at gcc dot gnu dot org  2009-12-31 11:21 -------
Confirmed as fixed on x86_64-apple-darwin10 at rev. 155523.


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fxcoudert 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=41956

[Bug tree-optimization/41956] Segfault in vectorizer

[irar at gcc dot gnu dot org]

------- Comment #10 from irar at gcc dot gnu dot org  2010-01-04 12:46 -------
Subject: Bug 41956

Author: irar
Date: Mon Jan  4 12:45:46 2010
New Revision: 155614

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=155614
Log:

        PR tree-optimization/41956
        * tree-vect-analyze.c (vect_supported_load_permutation_p): Add check
        that the load indices differ.


Added:
    branches/gcc-4_4-branch/gcc/testsuite/gcc.dg/vect/pr41956.c
Modified:
    branches/gcc-4_4-branch/gcc/ChangeLog
    branches/gcc-4_4-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_4-branch/gcc/tree-vect-analyze.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41956