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From: "ivan.pribec at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/113305] New: ICE with do concurrent and ivdep
Date: Wed, 10 Jan 2024 11:00:00 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: fortran
X-Bugzilla-Version: 13.2.0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113305

            Bug ID: 113305
           Summary: ICE with do concurrent and ivdep
           Product: gcc
           Version: 13.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ivan.pribec at gmail dot com
  Target Milestone: ---

Created attachment 57022
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D57022&action=3Dedit
mwe using do concurrent and ivdep directive

An internal compiler error is triggered by adding the ivdep directive to a =
do
concurrent loop:

program dc
implicit none
real :: a(12), b(12)
integer :: i
call random_number(b)
!GCC$ ivdep
do concurrent (i=3D1:12)
    a(i) =3D 2*b(i)
end do
end program

...

$ gfortran -Wall dc.f90=20
f951: internal compiler error: Segmentation fault: 11
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
See <https://github.com/Homebrew/homebrew-core/issues> for instructions.=