[Bug fortran/77420] [5/6/7 Regression] gfortran and equivalence produces internal compiler error

["kargl at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77420

--- Comment #8 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Thu Sep 29 22:09:42 2016
New Revision: 240640

URL: https://gcc.gnu.org/viewcvs?rev=240640&root=gcc&view=rev
Log:
2016-09-29  Steven G. Kargl  <kargl@gcc.gnu.org>

        Backport from trunk

        PR fortran/77420
        * trans-common.c:  Handle array elements in equivalence when
        the lower and upper bounds of array spec are NULL.

        PR fortran/77460
        * simplify.c (simplify_transformation_to_scalar):  On error, result
        may be NULL, simply return.


2016-09-29  Steven G. Kargl  <kargl@gcc.gnu.org>

        Backport from trunk

        PR fortran/77420
        * gfortran.dg/pr77420_1.f90: New test.
        * gfortran.dg/pr77420_2.f90: Ditto.
        * gfortran.dg/pr77420_3.f90: New test. Requires ...
        * gfortran.dg/pr77420_4.f90: this file.

        PR fortran/77460
        * gfortran.dg/pr77460.f90: New test.

Added:
    branches/gcc-5-branch/gcc/testsuite/gfortran.dg/pr77420_1.f90
    branches/gcc-5-branch/gcc/testsuite/gfortran.dg/pr77420_2.f90
    branches/gcc-5-branch/gcc/testsuite/gfortran.dg/pr77420_3.f90
    branches/gcc-5-branch/gcc/testsuite/gfortran.dg/pr77420_4.f90
    branches/gcc-5-branch/gcc/testsuite/gfortran.dg/pr77460.f90
Modified:
    branches/gcc-5-branch/gcc/fortran/ChangeLog
    branches/gcc-5-branch/gcc/fortran/simplify.c
    branches/gcc-5-branch/gcc/fortran/trans-common.c
    branches/gcc-5-branch/gcc/testsuite/ChangeLog