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compiler 2020.1.217 - internal error: assertion failed: find_assoc_pragma: pragma not found

VladimirV
Beginner
3,547 Views

Good day!

I have recently obtained the following compile error with Intel Compiler 2020.1.217.

internal error: assertion failed: find_assoc_pragma: pragma not found (shared/cfe/edgcpfe/il.c, line 24734)
                                function_2a(temp1[i_ + 2 * comp * dofs_per_face],
                                ^
compilation aborted

The problematic OpenMP statement in the lines above is "#pragma omp simd". With version 2019.5.281 everything compiled nicely.

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18 Replies
AbhishekD_Intel
Moderator
3,534 Views

Hi,

Thanks for reporting the issue to us. We are forwarding this issue to the concerned team. They will get back to you.

 

Warm Regards,

Abhishek

 

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Viet_H_Intel
Moderator
3,527 Views

Can you look into your buildlog and see which source file gave the internal error, then create a preprocess (replace -c with -E and remove -o filename.o) file for us to investigate?

Thanks,


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VladimirV
Beginner
3,515 Views

Thank you for the quick response.

Please check if the attachment is that what you asked for.

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Viet_H_Intel
Moderator
3,510 Views

I dont have "7z" handy to extract your file. Can you provide us .tbz. or some thing that I can use "tar" to extract it.

Also, please provide us your command line options as well.

Thanks,


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VladimirV
Beginner
3,505 Views

I attached gzip archive, check it please. There is already the preprocessed i-file there.

My compile line is:

mpiicpc $(CXX_FLAGS) -o step-67.cc.o -c step-67.cc

where

CXX_FLAGS = -fpic -ansi -w2 -diag-disable=remark -wd21 -wd68 -wd135 -wd175 -wd177 -wd191 -wd193 -wd279 -wd327 -wd383 -wd854 -wd981 -wd1418 -wd1478 -wd1572 -wd2259 -wd2536 -wd2651 -wd3415 -wd15531 -wd15552 -wd111 -wd128 -wd185 -wd186 -wd280 -qopenmp-simd -std=c++14 -march=native -Wno-array-bounds -Wno-parentheses -no-ansi-alias -ip -funroll-loops -O3

 

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Viet_H_Intel
Moderator
3,483 Views

Thanks for the test case. I've reported this bug to our Developer.


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SRett
Beginner
3,371 Views

We just stumbled upon this problem, too.

compiler: icpc (ICC) 2021.1 Beta 20200827 (using the latest docker image)

```

/opt/intel/oneapi/compiler/2021.1-beta10/linux/bin/intel64/icpc -DAUTOPAS_OPENMP -DSPDLOG_COMPILED_LIB -Iexamples/md-flexible -I../../examples/md-flexible -I../../src -Isrc -I../../tools/. -O3 -DNDEBUG -fno-math-errno -fp-model precise -qopenmp-simd -march=native -qopenmp -std=c++17 -MD -MT examples/md-flexible/CMakeFiles/md-flexible.dir/src/main.cpp.o -MF examples/md-flexible/CMakeFiles/md-flexible.dir/src/main.cpp.o.d -o examples/md-flexible/CMakeFiles/md-flexible.dir/src/main.cpp.o -c ../../examples/md-flexible/src/main.cpp
FAILED: examples/md-flexible/CMakeFiles/md-flexible.dir/src/main.cpp.o
/opt/intel/oneapi/compiler/2021.1-beta10/linux/bin/intel64/icpc -DAUTOPAS_OPENMP -DSPDLOG_COMPILED_LIB -Iexamples/md-flexible -I../../examples/md-flexible -I../../src -Isrc -I../../tools/. -O3 -DNDEBUG -fno-math-errno -fp-model precise -qopenmp-simd -march=native -qopenmp -std=c++17 -MD -MT examples/md-flexible/CMakeFiles/md-flexible.dir/src/main.cpp.o -MF examples/md-flexible/CMakeFiles/md-flexible.dir/src/main.cpp.o.d -o examples/md-flexible/CMakeFiles/md-flexible.dir/src/main.cpp.o -c ../../examples/md-flexible/src/main.cpp
../../src/autopas/containers/verletClusterLists/VerletClusterLists.h(594): internal error: assertion failed: find_assoc_pragma: pragma not found (il.c, line 25362 in find_assoc_pragma)

loopBody(cluster);
^

compilation aborted for ../../examples/md-flexible/src/main.cpp (code 4)

```

In case you can use an additional test-case, I have attached it below.

Sadly, it is not at all minimal and taken from our code base.

The code compiled fine with a 2019 version of icpc.

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Viet_H_Intel
Moderator
3,366 Views

Can you use -O1 instead of -O3 as a workaround?

Thanks,



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SRett
Beginner
3,364 Views

Hi,

compilation in debug mode, or using -O1 does not help.

But thanks for the suggestion.

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SRett
Beginner
3,360 Views

(i.e. the error persists.)

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Viet_H_Intel
Moderator
3,352 Views

Thanks,

I've also reported your case to our Developer.

Here is a small reproducer:


$ icpc test2.cpp -c -O3 -qopenmp -std=c++17

test2.cpp(7): internal error: assertion failed: find_assoc_pragma: pragma not found (il.c, line 25362 in find_assoc_pragma)


    f(0);

    ^


compilation aborted for test2.cpp (code 4)

$ cat test2.cpp

template < typename F>

void foo(const F& f)

{

  #pragma omp parallel for schedule(dynamic) collapse(2)

  for (unsigned int v = 0; v < 0; ++v){

   for (unsigned int t = 0; t < 0; ++t){

   f(0);

}

}

}

void f() {

 foo( [](const auto &indices_2) {} );

}



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psychocoder
Beginner
3,113 Views

We hit the same issue in [alpaka](https://github.com/alpaka-group/alpaka/pull/1279)

A workaround is:

template<typename F>
void foo(const F& f)
{
  #pragma omp parallel for schedule(dynamic) collapse(2) 
  for (unsigned int v = 0; v < 0; ++v){
   for (unsigned int t = 0; t < 0; ++t){
      auto x = [&f]( const auto & i){ f(i);};
      x(0);
   }
  }
}

void f() {
 foo( [](const auto &indices_2) {} );
}

 

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psychocoder
Beginner
3,085 Views

I missed to add the compiler version I used to test my workaround.

```

icpc -V

Intel(R) C++ Intel(R) 64 Compiler for applications running on Intel(R) 64, Version 19.1.3.304 Build 20200925_000000
Copyright (C) 1985-2020 Intel Corporation. All rights reserved.

```

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Viet_H_Intel
Moderator
3,082 Views

Thanks for the workaround. It also works with our oneAPI 2021.2

$ icpc -V

Intel(R) C++ Intel(R) 64 Compiler Classic for applications running on Intel(R) 64, Version 2021.2.0 Build 20210228_000000



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ArpitaP_Intel
Moderator
2,953 Views

Hi,


Glad to know the issue is resolved. If any addition help is required, please raise another thread, as this thread will no longer be monitored.


Regards,

Arpita


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psychocoder
Beginner
2,947 Views

Dear Arpita,

 

the issue is NOT solved.

We only know a workaround that can be used until the bug is fixed in the compiler.

As soon as this issue is fixed it should be announced in this thread that the reader/follower is aware of which ICC version is solving the issue.

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ArpitaP_Intel
Moderator
2,926 Views

Hi,


I really apologize .

I thought that the work around works perfectly fine. I would surely keep the forum posted regarding the issue fix. But I cannot promise the time frame of this issue fix.


Regards,

Arpita


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Devorah_H_Intel
Moderator
2,102 Views

The fix is available in the latest oneAPI 2022.2. 

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