[Bug fortran/66227] [5/6/7 Regression] [OOP] EXTENDS_TYPE_OF n returns wrong result for polymorphic variable allocated to extended type

[janus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66227

--- Comment #10 from janus at gcc dot gnu.org ---
Author: janus
Date: Wed Nov 23 16:46:31 2016
New Revision: 242770

URL: https://gcc.gnu.org/viewcvs?rev=242770&root=gcc&view=rev
Log:
2016-11-23  Janus Weil  <janus@gcc.gnu.org>

        Backport from trunk
        PR fortran/66227
        * simplify.c (gfc_simplify_extends_type_of): Fix missed optimization.
        Prevent over-simplification. Fix a comment. Add a comment.

2016-11-23  Janus Weil  <janus@gcc.gnu.org>

        Backport from trunk
        PR fortran/66227
        * gfortran.dg/extends_type_of_3.f90: Fix and extend the test case.

Modified:
    branches/gcc-5-branch/gcc/fortran/ChangeLog
    branches/gcc-5-branch/gcc/fortran/simplify.c
    branches/gcc-5-branch/gcc/testsuite/ChangeLog
    branches/gcc-5-branch/gcc/testsuite/gfortran.dg/extends_type_of_3.f90