internal compiler error with __int128 and range switch case

[mrjones69]

Hello,

We found an internal compiler error using the Intel C++ 2022.1.0.

The bug occurs when you combine the use of gcc extensions __int128 and a switch case using the range (...) notation.

I have attached a trivial program that demonstrates the error.

You get this output from the compiler:

": internal error: 20000_0

compilation aborted for t.cpp (code 4)

This same code compiles and executes correctly using gcc or clang.

Thank you.

[SantoshY_Intel · Accepted solution]

Hi,

Thank you for posting in Intel Communities.

We were able to reproduce your issue using the Intel classic compilers(icc & icpc).

However, we can compile the code successfully using the Intel oneAPI DPC++/C++ compilers(icx, icpx & dpcpp) as shown below:

So, we recommend you to use Intel oneAPI DPC++/C++ compilers(icx, icpx & dpcpp).

If this resolves your issue, make sure to accept this as a solution. This would help others with a similar issue. Thank you!

Best Regards,

Santosh

[mrjones69]

Thank you!

We had not used the Intel compiler for many years and used icpc out of habit without understanding there were newer versions (icpx).

We updated our build to use icpx and it compiles perfectly now.

[SantoshY_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,

Santosh