[Bug fortran/113846] New: ice in fold_convert_loc, at fold-const.cc:2757

[Bug fortran/113846] New: ice in fold_convert_loc, at fold-const.cc:2757

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113846

            Bug ID: 113846
           Summary: ice in fold_convert_loc, at fold-const.cc:2757
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

Created attachment 57369
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57369&action=edit
F90 source code

From the flang test suite at
https://github.com/llvm/llvm-project/tree/main/flang/test,
file ./Lower/HLFIR/elemental-polymorphic-merge.f90, does this with recent
gfortran:

test $ ~/gcc/results.20240208.asan.ubsan/bin/gfortran -c
./Lower/HLFIR/elemental-polymorphic-merge.f90
./Lower/HLFIR/elemental-polymorphic-merge.f90:10:20:

   10 |   r = merge(x, y, m)
      |                    1
internal compiler error: in fold_convert_loc, at fold-const.cc:2757
0xac84c2 fold_convert_loc(unsigned int, tree_node*, tree_node*)
        /home/dcb38/gcc/working/gcc/../../trunk.20210101/gcc/fold-const.cc:2757
0x8ade4d gfc_conv_intrinsic_merge(gfc_se*, gfc_expr*)
       
/home/dcb38/gcc/working/gcc/../../trunk.20210101/gcc/fortran/trans-intrinsic.cc:7589

[Bug fortran/113846] ice in fold_convert_loc, at fold-const.cc:2757

[anlauf at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113846

anlauf at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1
           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=105371
   Last reconfirmed|                            |2024-02-09

--- Comment #1 from anlauf at gcc dot gnu.org ---
MERGE and CLASS are not yet handled well.

See also pr105371 for scalar versions.

[Bug fortran/113846] ice in fold_convert_loc, at fold-const.cc:2757

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113846

--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
From the same flang test suite, the following files seem to crash in the
same routine:

./Lower/HLFIR/structure-constructor.f90
./Lower/HLFIR/convert-mbox-to-value.f90
./Lower/polymorphic-temp.f90
./Lower/structure-constructors-alloc-comp.f90

It might be worth making sure any fix for this bug also fixes these four.