[Bug c++/33435] New: internal compiler error with templates and openmp

[Bug c++/33435] New: internal compiler error with templates and openmp

[E dot Kuemmerle at fz-juelich dot de]

I get the error message

bug.cpp:16: internal compiler error: in create_tmp_var, at gimplify.c:487

when compiling the following code with

g++ -fopenmp -DTVMET_OPTIMIZE -c bug.cpp

where bug.cpp contains:

#include <tvmet/Vector.h>           // Tiny Vector Matrix library using
Expression Templates
#include <tvmet/VectorFunctions.h>  // http://tvmet.sourceforge.net/
using namespace tvmet;

int main() {
  Vector<int,3> a[10];
  int i;
#pragma omp parallel
  {
#pragma omp for schedule(dynamic)
    for (i=0; i<10; ++i) {
      // do something
    }
#pragma omp master
    {
        a[0] = a[1];
    }
#pragma omp for schedule(dynamic)
    for (i=0; i<10; ++i) {
      // do something
    }
  }
}

The problem is definitely related to openmp because the following code compiles
without any error:

#include <tvmet/Vector.h>           // Tiny Vector Matrix library using
Expression Templates
#include <tvmet/VectorFunctions.h>  // http://tvmet.sourceforge.net/
using namespace tvmet;

int main() {
  Vector<int,3> a[10];
  int i;
#pragma omp parallel for schedule(dynamic)
  for (i=0; i<10; ++i) {
    // do something
  }
  a[0] = a[1];
#pragma omp parallel for schedule(dynamic)
  for (i=0; i<10; ++i) {
    // do something
  }
}


-- 
           Summary: internal compiler error with templates and openmp
           Product: gcc
           Version: 4.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: E dot Kuemmerle at fz-juelich dot de
 GCC build triplet: x86_64-linux-gnu
  GCC host triplet: x86_64-linux-gnu
GCC target triplet: x86_64-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33435

[Bug c++/33435] internal compiler error with templates and openmp

[bangerth at dealii dot org]

------- Comment #1 from bangerth at dealii dot org  2007-09-18 19:16 -------
Can you try to come up with an example that is self-contained,
i.e. only contains those parts of the Tiny Vector Matrix library
that are really used (or none at all)?

W.


-- 

bangerth at dealii dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bangerth at dealii dot org
            Summary|internal compiler error with|internal compiler error with
                   |templates and openmp        |templates and openmp


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33435

[Bug c++/33435] internal compiler error with templates and openmp

[E dot Kuemmerle at fz-juelich dot de]

------- Comment #2 from E dot Kuemmerle at fz-juelich dot de  2007-09-19 09:40 -------
Here is a self-contained example:

template<class T, int Sz>
class Vector {
public:
  explicit Vector() {}
  ~Vector() {}
private:
  T                                             m_data[Sz];
};

int main() {
  Vector<int,3> a[10];
  int i;
#pragma omp parallel
  {
#pragma omp for schedule(dynamic)
    for (i=0; i<10; ++i) {
      // do something
    }
#pragma omp master
    {
        a[0] = a[1];
    }
#pragma omp for schedule(dynamic)
    for (i=0; i<10; ++i) {
      // do something
    }
  }
}

I can avoid the internal compiler error by:
 1) removing the '-fopenmp' option
 2) changing the '#pragma omp' statements as shown in the original example
 3) removing the destructor '~Vector() {}' from 'class Vector' in the new
example!


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33435

[Bug c++/33435] internal compiler error with templates and openmp

[bangerth at dealii dot org]

------- Comment #3 from bangerth at dealii dot org  2007-09-23 17:20 -------
Confirmed.
W.


-- 

bangerth at dealii dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2007-09-23 17:20:55
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33435

[Bug c++/33435] internal compiler error with templates and openmp

[E dot Kuemmerle at fz-juelich dot de]

------- Comment #4 from E dot Kuemmerle at fz-juelich dot de  2008-03-12 14:45 -------
The bug ist still present in gcc 4.3.0:

bug.cpp:16: internal compiler error: in create_tmp_var, at gimplify.c:497


-- 

E dot Kuemmerle at fz-juelich dot de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|4.2.1                       |4.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33435

[Bug c++/33435] internal compiler error with templates and openmp

[bangerth at dealii dot org]

------- Comment #5 from bangerth at dealii dot org  2008-06-16 15:03 -------
This appears to work for me now with
  gcc version 4.4.0 20080527 (experimental) [trunk revision 136055] (GCC) 
Can you check whether it also works for you?

W.


-- 

bangerth at dealii dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |WAITING


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33435

[Bug c++/33435] internal compiler error with templates and openmp

[E dot Kuemmerle at fz-juelich dot de]

------- Comment #6 from E dot Kuemmerle at fz-juelich dot de  2008-06-17 14:06 -------
I tried gcc 4.4.0 20080613 (experimental):
indeed, it works now!


-- 

E dot Kuemmerle at fz-juelich dot de changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33435

[Bug c++/33435] internal compiler error with templates and openmp

[E dot Kuemmerle at fz-juelich dot de]

------- Comment #7 from E dot Kuemmerle at fz-juelich dot de  2008-06-18 07:20 -------
gcc release 4.3.1 already works!


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33435