cv::split() crashes on Xeon processor but works elsewhere - c++

Question

I am using pre-built opencv lib & dll, version 3.4.3 Winpack (downloaded from official site https://opencv.org/releases.html).
Till now everything worked fine, but recently my code started to crash.
It is one specific function that causes this crash: cv::split(). It is a common utility funtion to extract channels
from cv::Mat array. The crash occurs only on Xeon processor, Windows Server 2012. Regardless of preceding calls or context, it just crashes immediately on this call and the application just closes.
On other processors the same .exe works without problems, the code is normally tested on Windows 10 with ordinary processors. I don't have Xeon processor at hand to test every function, but the mentioned crash could be reproduced 100% on a Xeon Gold machine and I have used quite a lot of different library functions and they worked there, so it is the first one that crashed.
It seems that some functions' runtime simply contains instruction that are incompatible with the Xeon processor so it just crashes there.
Question: how do I know in advance whether certain openCV function will work or not on a Xeon processor?
Currently I have just removed cv::split() calls from my code and replced it by cv::extractChannel() methods which works fine on all tested platforms. I suspect one option would be to compile a custom version of the lib and disable specific instructions, but that will need knowledge of what to disable, etc, so frankly I am not in the mood involving
custom compiled version for what seems relatively 'standard architecture' (Xeon processor).
What can you suggest to avoid these errors?
Maybe there is a list of openCV functions that are known to be 'special' (not for Xeon processor so I can just avoid them)?
Code example:
# include <opencv2/opencv.hpp>
int main ( int argc, char* argv[] )
{
cv::Mat Patch = cv::imread ( "image.png", -1 );
cv::Mat Patch_planes[4];
cv::split ( Patch, Patch_planes );
return 0;
}
Compiler command (Microsoft (R) C/C++ Optimizing Compiler Version 19.15.26732.1 for x64):
cl.exe "minim.cpp" /EHsc /W2 /I "c:\VCLIB\openCV-3.4.3" "c:\VCLIB\openCV-3.4.3\lib\opencv_world343.lib" /link /SUBSYSTEM:CONSOLE

Answer 1

How do I know in advance whether certain openCV function will work or not on a Xeon processor?
You don't. The compiler will use whatever instructions it deems most suitable to compile any particular piece of code, subject to the constraints given on the command line.
So to be safe (assuming it is an 'illegal instruction' error), you probably do need to compile openCV for the least capable processor you need to support and then check the performance hit on other processors. Either that or check the CPU in your installer and install a version of openCV tailored to that processor. Yuk, I don't envy you.