Matrix multiplication crashes using mingw 4.7
Submitted by djurikom
Assigned to Nobody
Link to original bugzilla bug (#556)
Operating system: Windows
Description
The code compiles without any problems. However, when executed the program crashes in this function:
MatrixXd sqdist(MatrixXd A, MatrixXd B)
{
A.transposeInPlace();
B.transposeInPlace();
MatrixXd aa = (A.cwiseProduct(A)).colwise().sum();
MatrixXd bb = (B.cwiseProduct(B)).colwise().sum();
MatrixXd aSquare(aa.cols(), bb.cols());
MatrixXd bSquare(aa.cols(), bb.cols());
for (int i = 0; i < bb.cols(); i++)
{
aSquare.col(i) = aa.transpose();
}
for (int i = 0; i < aa.cols(); i++)
{
bSquare.row(i) = bb;
}
MatrixXd dist = aSquare + bSquare - 2.0 * A.transpose() * B;
abs(dist);
return dist; }
The function is supposed to find a distance matrix between rows in A and B. The program crashes at "2.0 * A.transpose() * B". It is interesting that it DOES NOT crash when I compile using
gcc -v
Using built-in specs.
Target: i686-w64-mingw32
Configured with: ../gcc44-svn/configure --target=i686-w64-mingw32 --host=i686-w6
4-mingw32 --disable-multilib --disable-nls --disable-win32-registry --prefix=/mi
ngw32 --with-gmp=/mingw32 --with-mpfr=/mingw32 --enable-languages=c,c++
Thread model: win32
gcc version 4.4.3 (GCC)
while it DOES crash using
gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=c:/users/ny_name/mingw/bin/../libexec/gcc/i686-pc-mingw32/4.
7.0/lto-wrapper.exe
Target: i686-pc-mingw32
Configured with: ../src/configure --prefix=/c/temp/gcc/dest --with-gmp=/c/temp/g
cc/gmp --with-mpfr=/c/temp/gcc/mpfr --with-mpc=/c/temp/gcc/mpc --enable-language
s=c,c++ --with-arch=i686 --with-tune=generic --disable-libstdcxx-pch --disable-n
ls --disable-shared --disable-sjlj-exceptions --disable-win32-registry --enable-
checking=release --enable-lto
Thread model: win32
gcc version 4.7.0 (GCC)
I am compiling using:
g++ -Wall -Wconversion -O3