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From: "longb at cray dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/55501] New: ICE using MERGE in constant expr
Date: Wed, 28 Nov 2012 00:27:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55501

             Bug #: 55501
           Summary: ICE using MERGE in constant expr
    Classification: Unclassified
           Product: gcc
           Version: 4.7.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: longb@cray.com


Test (extracted from a larger module)

> cat test2.f90
module test

integer,parameter,private :: int32 = 4
integer,private,parameter :: dik = kind(0)     ! Default Integer Kind

type MPI_Datatype
   integer :: mpi_val
end type

type(MPI_Datatype),parameter,private :: MPIx_I4       = MPI_Datatype(4)
type(MPI_Datatype),parameter,private :: MPIx_I8       = MPI_Datatype(8)
type(MPI_Datatype),parameter :: MPI_INTEGER           = merge(MPIx_I4, MPIx_I8,
 dik==int32)

end module test

> ftn -c test2.f90
f951: internal compiler error: in gfc_conv_structure, at
fortran/trans-expr.c:5360
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Also fails with 4.8.

Allowing MERGE here is a F2003 feature (elemental intrinsic with constant
arguments). In any case, the compiler should not abort.

Compiles OK with Cray compiler.