[Bug c++/101241] New: Internal compiler error from MathFunctions.h in the eigen library

[Bug c++/101241] New: Internal compiler error from MathFunctions.h in the eigen library

[r.langer at itv dot rwth-aachen.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101241

            Bug ID: 101241
           Summary: Internal compiler error from MathFunctions.h in the
                    eigen library
           Product: gcc
           Version: 11.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: r.langer at itv dot rwth-aachen.de
  Target Milestone: ---

I used a docker image of Clean Linux (version 34790) and installed gcc 11.1.1
with:

swupd bundle-add c-basic wget

The following commands produce the error:
wget https://gitlab.com/libeigen/eigen/-/archive/3.4-rc1/eigen-3.4-rc1.tar.bz2
tar -xf eigen-3.4-rc1.tar.bz2
printf "#include <Eigen/Core>\n int main(int,char const*[]){}\n" >
eigen_bug.cpp
g++ eigen_bug.cpp -Ieigen-3.4-rc1/ -Ofast -ffast-math

Expected output from the last command:
In file included from eigen-3.4-rc1/Eigen/Core:171,
                 from eigen_bug.cpp:1:
eigen-3.4-rc1/Eigen/src/Core/MathFunctions.h:1036:71: internal compiler error:
in maybe_default_option, at opts.c:332
 1036 | template<> EIGEN_TMP_NOOPT_ATTRIB bool isnan_impl(const long double& x)
{ return __builtin_isnan(x); }
      |                                                                       ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.


The following works fine:
g++ eigen_bug.cpp -Ieigen-3.4-rc1/ -O3 -ffast-math

[Bug c++/101241] Internal compiler error from MathFunctions.h in the eigen library

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101241

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mpolacek at gcc dot gnu.org

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Can you provide the preprocessed source?  Use -save-temps to get it.

[Bug c++/101241] Internal compiler error from MathFunctions.h in the eigen library

[r.langer at itv dot rwth-aachen.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101241

--- Comment #2 from Raymond Langer <r.langer at itv dot rwth-aachen.de> ---
Created attachment 51072
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51072&action=edit
preprocessed output

[Bug c++/101241] Internal compiler error from MathFunctions.h in the eigen library

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101241

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I cannot reproduce this:

$ xg++ -c a-eigen_bug.ii -O3 -ffast-math -march=haswell
compiles.

[Bug c++/101241] Internal compiler error from MathFunctions.h in the eigen library

[r.langer at itv dot rwth-aachen.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101241

--- Comment #4 from Raymond Langer <r.langer at itv dot rwth-aachen.de> ---
(In reply to Marek Polacek from comment #3)
> I cannot reproduce this:
> 
> $ xg++ -c a-eigen_bug.ii -O3 -ffast-math -march=haswell
> compiles.

Yes, 
g++ -c a-eigen_bug.ii -O3 -ffast-math -march=haswell
compiles.

However, -Ofast does not work together with -ffast-math:
g++ -c a-eigen_bug.ii -Ofast -ffast-math -march=haswell

[Bug c++/101241] Internal compiler error from MathFunctions.h in the eigen library

[r.langer at itv dot rwth-aachen.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101241

--- Comment #5 from Raymond Langer <r.langer at itv dot rwth-aachen.de> ---
Using only -Ofast doesn't work either:
g++ -c a-eigen_bug.ii -Ofast

[Bug c++/101241] Internal compiler error from MathFunctions.h in the eigen library

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101241

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Can't reproduce with -Ofast -ffast-math -march=haswell either.

[Bug target/101241] Internal compiler error from MathFunctions.h in the eigen library

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101241

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
How did you configure GCC?
Also what revision is your 11.1.1 at?

[Bug target/101241] Internal compiler error from MathFunctions.h in the eigen library

[r.langer at itv dot rwth-aachen.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101241

--- Comment #8 from Raymond Langer <r.langer at itv dot rwth-aachen.de> ---
I didn't configure gcc myself. I run gcc in a Clean Linux docker container:

docker run -it clearlinux /bin/bash

In the docker container, I run:

swupd bundle-add c-basic

gcc --version

gcc (Clear Linux OS for Intel Architecture) 11.1.1 20210617
releases/gcc-11.1.0-303-ge86ad5ad01
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

The uploaded file does not compile with: 

g++ -c a-eigen_bug.ii -Ofast

[Bug target/101241] Internal compiler error from MathFunctions.h in the eigen library

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101241

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2021-06-28
     Ever confirmed|0                           |1

--- Comment #9 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Raymond Langer from comment #8)
> releases/gcc-11.1.0-303-ge86ad5ad01

This does not make sense.  object ge86ad5ad01 does not exist in
origin/releases/gcc-11 branch at all.
You are going to have to report this to the Clear Linux OS folks.

[Bug target/101241] Internal compiler error from MathFunctions.h in the eigen library

[r.langer at itv dot rwth-aachen.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101241

--- Comment #10 from Raymond Langer <r.langer at itv dot rwth-aachen.de> ---
I've reported the bug here:

https://github.com/clearlinux/distribution/issues/2393

The problem seems to be a Clear Linux patch.

Thanks for your support!

[Bug target/101241] Internal compiler error from MathFunctions.h in the eigen library

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101241

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|---                         |INVALID

--- Comment #11 from H.J. Lu <hjl.tools at gmail dot com> ---
Not a GCC bug.

[Bug target/101241] Internal compiler error from MathFunctions.h in the eigen library

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101241

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|INVALID                     |MOVED