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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/114020] New: ENTRY and procedure pointer leads to ICE
Date: Tue, 20 Feb 2024 20:48:23 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: fortran
X-Bugzilla-Version: 14.0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114020

            Bug ID: 114020
           Summary: ENTRY and procedure pointer leads to ICE
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: kargl at gcc dot gnu.org
  Target Milestone: ---

Found with the Fujitsu testsuite.  Reduced testcase.
Note, if the use of ENTRY is replace with an actual=20
function, ie., 'function kmr_fixfun() result(zz)" the
code compiles and executes correctly.

!
! https://github.com/fujitsu/compiler-test-suite
! Reduced from Fortran/0071/0071_0018.f90
!
module xxxf

   contains

   subroutine sub
   end subroutine

   function kmr_fixfun2() result(zz)
      entry kmr_fixfun() result(zz)
      procedure(sub), pointer :: zz
      zz =3D> null()
   end function=20

   integer function foo() result(zz)
      procedure(sub), pointer :: fp
      fp =3D> kmr_fixfun()
      zz =3D 0
    end function foo

end module xxxf

   use xxxf
   if (foo() /=3D 0) stop
end

% gfcx -o z 0071/0071_0018.f90
0071/0071_0018.f90:8:3:

    8 |    function kmr_fixfun2() result(zz)
      |   ^
internal compiler error: in fold_convert_loc, at fold-const.cc:2633
0x741511 fold_convert_loc(unsigned int, tree_node*, tree_node*)
        ../../gccx/gcc/fold-const.cc:2633
0xd650c9 gimplify_modify_expr
        ../../gccx/gcc/gimplify.cc:6356
0xd4e52c gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*=
),
int)=