[Bug c/25990] New: gomp ICE with -fopenmp and -O2

[Bug c/25990] New: gomp ICE with -fopenmp and -O2

[perrin at msli dot com]

The attached code ICE's with -fopenmp and -O2, but not with just -fopenmp

I build both the recent trunk (svn 110282) and the gomp branch, and it ICE's
with both. 

/home/perrin/GOMP/INSTALL/110296/bin/gcc -Wall -std=c99 -v --save-temps -O2 
-fopenmp    -m64 -o test_gomp_2 test_gomp_2.c
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: /home/perrin/GOMP/gomp-20050608-branch/configure
--prefix=/home/perrin/GOMP/INSTALL/110296/ --enable-threads=posix
--enable-languages=c,c++,fortran
Thread model: posix
gcc version 4.2.0-gomp-20050608-branch 20060126 (experimental) (merged
20060126)

/home/perrin/GOMP/INSTALL/110296/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.2.0-gomp-20050608-branch/cc1
-E -quiet -v -iprefix
/home/perrin/GOMP/INSTALL/110296/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.2.0-gomp-20050608-branch/
-D_REENTRANT test_gomp_2.c -m64 -mtune=generic -std=c99 -Wall -fopenmp -O2
-fpch-preprocess -o test_gomp_2.i
ignoring nonexistent directory
"/home/perrin/GOMP/INSTALL/110296/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.2.0-gomp-20050608-branch/../../../../x86_64-unknown-linux-gnu/include"
ignoring duplicate directory
"/home/perrin/GOMP/INSTALL/110296//lib/gcc/x86_64-unknown-linux-gnu/4.2.0-gomp-20050608-branch/include"
ignoring nonexistent directory
"/home/perrin/GOMP/INSTALL/110296//lib/gcc/x86_64-unknown-linux-gnu/4.2.0-gomp-20050608-branch/../../../../x86_64-unknown-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:

/home/perrin/GOMP/INSTALL/110296/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.2.0-gomp-20050608-branch/include
 /usr/local/include
 /home/perrin/GOMP/INSTALL/110296//include
 /usr/include
End of search list.

/home/perrin/GOMP/INSTALL/110296/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.2.0-gomp-20050608-branch/cc1
-fpreprocessed test_gomp_2.i -quiet -dumpbase test_gomp_2.c -m64 -mtune=generic
-auxbase test_gomp_2 -O2 -Wall -std=c99 -version -fopenmp -o test_gomp_2.s
GNU C version 4.2.0-gomp-20050608-branch 20060126 (experimental) (merged
20060126) (x86_64-unknown-linux-gnu)
        compiled by GNU C version 4.2.0-gomp-20050608-branch 20060126
(experimental) (merged 20060126).
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: b18775707d7fd6662765314b1efc240e
test_gomp_2.c: In function 'main':
test_gomp_2.c:121: warning: unused variable 'HH'
test_gomp_2.c:120: warning: unused variable 'GG'
test_gomp_2.c: In function 'main.omp_fn.1':
test_gomp_2.c:223: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
make: *** [test_gomp] Error 1


-- 
           Summary: gomp ICE with -fopenmp and -O2
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: perrin at msli dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25990

[Bug c/25990] gomp ICE with -fopenmp and -O2

[perrin at msli dot com]

------- Comment #1 from perrin at msli dot com  2006-01-27 07:35 -------
Created an attachment (id=10740)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=10740&action=view)
fails with -fopenmp and -O2


contains two

#pragama omp parallel for 

loops


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25990

[Bug middle-end/25990] gomp ICE with -fopenmp and -O2

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2006-01-27 12:58 -------
This is a GC failure:
#0  ggc_set_mark (p=0xafafafafafafafaf) at
/home/pinskia/src/checkin/trunk/gcc/ggc-page.c:588
#1  0x0000000000620268 in gt_ggc_mx_basic_block_def (x_p=Variable "x_p" is not
available.
) at gtype-desc.c:462
#2  0x000000000062060f in gt_ggc_mx_VEC_basic_block_gc (x_p=Variable "x_p" is
not available.
) at gtype-desc.c:193
#3  0x0000000000620673 in gt_ggc_mx_control_flow_graph (x_p=Variable "x_p" is
not available.
) at gtype-desc.c:624
#4  0x000000000062072f in gt_ggc_mx_function (x_p=Variable "x_p" is not
available.
) at gtype-desc.c:639
#5  0x0000000000409622 in gt_ggc_mx_lang_tree_node (x_p=Variable "x_p" is not
available.
) at gt-c-decl.h:315
#6  0x0000000000619df7 in gt_ggc_mx_cgraph_node (x_p=Variable "x_p" is not
available.
) at gtype-desc.c:166
#7  0x0000000000619f16 in gt_ggc_m_P11cgraph_node4htab (x_p=Variable "x_p" is
not available.
) at gtype-desc.c:1694


-- 

pinskia at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25990

[Bug middle-end/25990] gomp ICE with -fopenmp

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2006-01-27 14:09 -------
You can reproduce this with -std=c99 -fopenmp --param ggc-min-expand=0 --param
ggc-min-heapsize=0


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|gomp ICE with -fopenmp and -|gomp ICE with -fopenmp
                   |O2                          |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25990

[Bug middle-end/25990] gomp ICE with -fopenmp

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2006-01-27 14:11 -------
Reducing.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25990

[Bug middle-end/25990] gomp ICE with -fopenmp

[pinskia at gcc dot gnu dot org]

------- Comment #5 from pinskia at gcc dot gnu dot org  2006-01-27 14:22 -------
Reduced testcase:
__strcspn_c2 (__const char *__s, int __reject1, int __reject2)
{
  int m = 1,n = 1,s = 1;
  int DD,EE,num_s;
  int m_max = 99;
  int n_max = 00;
  for ( n = 1 ; n <= 99 ; n++ )
    for ( m = 1 ; m <= 99 ; m++ )
      for ( m = 1 ; m <= m_max ; m++)
        for ( s = 1 ; s <= num_s ; s++)
        {
          int liter ;
#pragma omp parallel for private(m,liter,s)
           for ( n = 1 ; n <= n_max ; n++) {}
        }
}


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dnovillo at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2006-01-27 14:22:50
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25990

[Bug middle-end/25990] gomp ICE with -fopenmp

[reichelt at gcc dot gnu dot org]

------- Comment #6 from reichelt at gcc dot gnu dot org  2006-01-27 15:18 -------
Even simpler testcase:

==============================================
void foo()
{
  int i;
  for ( i=0; i<1; i++ ) ;
  for ( i=0; i<1; i++ ) ;
  for ( i=0; i<1; i++ ) ;
  for ( i=0; i<1; i++ ) ;
  for ( i=0; i<1; i++ ) ;
#pragma omp parallel
  ;
}
==============================================


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reichelt at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |reichelt at gcc dot gnu dot
                   |                            |org
           Keywords|                            |monitored


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25990

[Bug middle-end/25990] gomp ICE with -fopenmp

[reichelt at gcc dot gnu dot org]

------- Comment #7 from reichelt at gcc dot gnu dot org  2006-02-01 12:38 -------
Hi Diego,

did you have a look at this one?
This makes -fopenmp almost unusable for the C++ frontend.
PR 26032 is probably a duplicate of this one.
I stumbled over the bug independently, too.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25990

[Bug middle-end/25990] gomp ICE with -fopenmp

[dnovillo at gcc dot gnu dot org]

------- Comment #8 from dnovillo at gcc dot gnu dot org  2006-02-01 12:56 -------
Mine.


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dnovillo at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |dnovillo at gcc dot gnu dot
                   |dot org                     |org
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2006-01-27 14:22:50         |2006-02-01 12:56:18
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25990

[Bug middle-end/25990] gomp ICE with -fopenmp

[tbptbp at gmail dot com]

------- Comment #9 from tbptbp at gmail dot com  2006-02-01 14:28 -------
And you can add PR 25983 on top of it :)


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25990

[Bug middle-end/25990] gomp ICE with -fopenmp

[dnovillo at gcc dot gnu dot org]

------- Comment #10 from dnovillo at gcc dot gnu dot org  2006-02-01 16:05 -------

I can't reproduced this with trunk@110474 nor gomp@110467.  Could you please
try again?


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dnovillo at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |WAITING


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25990

[Bug middle-end/25990] gomp ICE with -fopenmp

[reichelt at gcc dot gnu dot org]

------- Comment #11 from reichelt at gcc dot gnu dot org  2006-02-01 16:19 -------
I still get a segfault for the testcase in comment #6.
This is revision 110467 on x86_64-unknown-linux-gnu.
Note, that this is with the C frontend:

gcc -fopenmp --param ggc-min-expand=0 --param ggc-min-heapsize=0 -c PR25990.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25990

[Bug middle-end/25990] gomp ICE with -fopenmp

[pinskia at gcc dot gnu dot org]

------- Comment #12 from pinskia at gcc dot gnu dot org  2006-02-01 18:06 -------
I can still confirm it too.


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW
   Last reconfirmed|2006-02-01 12:56:18         |2006-02-01 18:06:32
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25990

[Bug middle-end/25990] gomp ICE with -fopenmp

[dnovillo at gcc dot gnu dot org]

------- Comment #13 from dnovillo at gcc dot gnu dot org  2006-02-01 22:36 -------
(In reply to comment #11)
> I still get a segfault for the testcase in comment #6.
> This is revision 110467 on x86_64-unknown-linux-gnu.
>
Ah, yes.  I had failed to notice the failure is on x86_64.  Sorry about that.


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dnovillo at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|2006-02-01 18:06:32         |2006-02-01 22:36:04
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25990

[Bug middle-end/25990] gomp ICE with -fopenmp

[dnovillo at gcc dot gnu dot org]

------- Comment #14 from dnovillo at gcc dot gnu dot org  2006-02-02 12:27 -------
Subject: Bug 25990

Author: dnovillo
Date: Thu Feb  2 12:27:02 2006
New Revision: 110511

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=110511
Log:

        PR 25990
        * tree-cfg.c (move_block_to_fn): Clear out the basic block
        array after growing it.

testsuite/

        PR 25990
        * gcc.dg/gomp/pr25990.c: New test.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-cfg.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25990

[Bug middle-end/25990] gomp ICE with -fopenmp

[dnovillo at gcc dot gnu dot org]

------- Comment #15 from dnovillo at gcc dot gnu dot org  2006-02-02 12:37 -------
Fixed.  http://gcc.gnu.org/ml/gcc-patches/2006-02/msg00121.html


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dnovillo at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25990