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Subject: [Bug fortran/103691] [12 Regression] ICE in
 get_array_ctor_element_at_index, at fold-const.c:13314 since
 r12-4694-gcb153222404e2e14
Date: Fri, 25 Mar 2022 10:23:06 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103691

--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:45e955b0a936eafc9838cdc00dcc31b3799b321b

commit r12-7811-g45e955b0a936eafc9838cdc00dcc31b3799b321b
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Fri Mar 25 11:22:15 2022 +0100

    fortran: Fix up initializers of param(0) PARAMETERs [PR103691]

    On the gfortran.dg/pr103691.f90 testcase the Fortran ICE emits
      static real(kind=3D4) a[0] =3D {[0 ... -1]=3D2.0e+0};
    That is an invalid RANGE_EXPR where the maximum is smaller than the
minimum.

    The following patch fixes that.  If TYPE_MAX_VALUE is smaller than
    TYPE_MIN_VALUE, the array is empty and so doesn't need any initializer,
    if the two are equal, we don't need to bother with a RANGE_EXPR and
    can just use that INTEGER_CST as the index and finally for the 2+ values
    in the range it uses a RANGE_EXPR as before.

    2022-03-25  Jakub Jelinek  <jakub@redhat.com>

            PR fortran/103691
            * trans-array.cc (gfc_conv_array_initializer): If TYPE_MAX_VALU=
E is
            smaller than TYPE_MIN_VALUE (i.e. empty array), ignore the
            initializer; if TYPE_MIN_VALUE is equal to TYPE_MAX_VALUE, use =
just
            the TYPE_MIN_VALUE as index instead of RANGE_EXPR.=