intel C++ compiler (windows): icx/dpcpp or icl?

[fonis]

I have installed Intel oneAPI base tool kit which comes with intel C++ compilers.

On "Intel oneAPI command prompt for Intel 64 for Visual Studio 2019", I can invoke either of dpcpp  and icx to compile C++ code. 

What's really the difference between the two? is it that for data parallel C++ code I need to use dpcpp and I can use either of the two for C++ code? Also, how icx/dpcpp compare with classic C++ compiler (icl on windows)?

There is some discussion on the thread major differences between dpcpp-and icx but it does not really answer my question.

[NoorjahanSk_Intel · Accepted solution]

Hi,

Thanks for reaching out to us.

ICX is Intel's next-gen compiler based on Clang /LLVM technology plus Intel proprietary optimizations and code generation.

The DPC++ Compiler compiles C++ and SYCL source files with code for both CPU and different accelerators.

DPCPP is built upon ICX as the underlying C++ Compiler with dpcpp driver.

Please refer to the below link for more details:

https://www.intel.com/content/www/us/en/develop/documentation/oneapi-dpcpp-cpp-compiler-dev-guide-and-reference/top/compiler-setup/use-the-command-line/invoke-the-compiler.html

ICC(Linux)/ICL(windows) is a classic compiler used to compile applications on CPU targets.

ICL and ICC are independent of icx/dpcpp and neither of them invokes each other

ICX enables OpenMP TARGET offload to Intel GPU targets.

Please refer to the below link for more details:

https://www.intel.com/content/www/us/en/develop/documentation/cpp-compiler-developer-guide-and-reference/top/compiler-setup/use-the-command-line/invoke-the-compiler.html

Thanks & Regards,

Noorjahan.

[NoorjahanSk_Intel]

Hi,

Thanks for accepting our solution. If you need any additional information, please post a new question as this thread will no longer be monitored by Intel.

Thanks & Regards,

Noorjahan.