http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55550
Bug #: 55550
Summary: internal compiler segmentation fault on openmp for
collapse
Classification: Unclassified
Product: gcc
Version: 4.6.3
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: lucjaul...@free.fr
Here is the error output
g++-4.7 -std=c++11 -DUSE_OPENMP -g -fopenmp -DVERBOSE=1 BestSolution.cpp
main.cpp Node.cpp SimulatedAnnealing.cpp -o run
Node.cpp: In member function ‘int Node::lowerBound(int, const intMatrix&, const
intMatrix&, const intVector&, const boolVector&)’:
Node.cpp:169:40: internal compiler error: Segmentation fault
Please submit a full bug report, [...]
The choke is on this line, specifically with the value 4 :
#pragma omp parallel for collapse(4)
then follow 4 imbricated for loops of the same size that look like
for(int k=0;k<dim;k++)
for(int i=...)
for(int l=...)
for(int j=...)
c[k*dim+i][l*dim+j] = f[i][k] * d[j][l];
Running on Linux (Ubuntu 12.04 precise) kernel 3.2.0.29 with a core i7.
Here is the output of my gcc -v :
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.6/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
4.6.3-1ubuntu5' --with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.6 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object
--enable-plugin --enable-objc-gc --disable-werror --with-arch-32=i686
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
