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From: Steve Lionel <steve@seesignature.invalid>
Newsgroups: comp.lang.fortran
Subject: Re: Intel oneAPI compiler not happy with AVX512
Date: Mon, 29 Apr 2024 16:49:25 -0400
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On 4/12/2024 5:58 AM, Woozy Song wrote:
> I have a package that contains nearly 500 f90 files. I noticed that in 
> the makefile, it was using -ax (automatic dispatch ) up to AVX2. I added 
> COMMON-AVX512 to the options. One thing I noticed was that compilation 
> is now slower. It seemed to stop for 30 seconds when it hit one 
> particular subroutine. But main problem was that after a few hundred 
> files, it aborted with unexpected internal error. The offending file 
> wasn't doing anything exotic, mostly a linear regression.
> This is 2024.1 version of the compiler, pretty much the latest.
> Has anybody else compiled for AVX512?

Please report this in 
https://community.intel.com/t5/Intel-Fortran-Compiler/bd-p/fortran-compiler 
and provide a reproducer. Internal Compiler Error is always a compiler 
bug. But before you do, try ifx instead of ifort, as it has an entirely 
different code generator and is the path forward for Intel. Bugs that 
are ifort-only are unlikely to get fixed.
-- 
Steve Lionel
ISO/IEC JTC1/SC22/WG5 (Fortran) Convenor
Retired Intel Fortran developer/support
Email: firstname at firstnamelastname dot com
Twitter: @DoctorFortran
LinkedIn: https://www.linkedin.com/in/stevelionel
Blog: https://stevelionel.com/drfortran
WG5: https://wg5-fortran.org