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29280 Discussions

ifort omp reduction bug in versions 16.0 and 17.0

Henneking__Stefan
Beginner
‎01-30-2019 03:16 PM
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I would like to report a bug in the Intel Compiler/OpenMP implementation of ifort 16.0 and 17.0. I am not sure if it has been reported before, but I could not find anything on it. The file attachment shows a little example that reproduces the bug. It is described in the README file, and implemented in the reduction.F90 file. The bug was reproduced on different systems.

-stefan

ifort-omp-bug.zip
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Juergen_R_R
Valued Contributor II
‎01-30-2019 03:18 PM
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ifort 16 is for sure no longer under development, and I am not sure about ifort 17. I think it also out of cycle. Does the problem appear in ifort 18 and 19 as well?

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Henneking__Stefan
Beginner
‎01-30-2019 03:21 PM
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Yes, I am aware that it may be outdated information. In fact, I noticed the bug first in Aug 2018 but had apparently reported it through the wrong channels. To answer your question: In ifort 18 the bug did not occur on the system I tested; I have not yet tried ifort 19.

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Steve_Lionel
Honored Contributor III
‎01-30-2019 05:04 PM
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Bugs in older versions are not fixed if the bug doesn't exist in the current version. If you can't reproduce it in 19, then I recommend using 19.

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Steve_Lionel
Honored Contributor III
‎01-30-2019 05:06 PM
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I tested this in 19 - it is correct there.

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