re PR fortran/66227 ([OOP] EXTENDS_TYPE_OF n returns wrong result for polymorphic variable allocated to extended type)

2016-11-17  Janus Weil  <janus@gcc.gnu.org>

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

2016-11-17  Janus Weil  <janus@gcc.gnu.org>

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

From-SVN: r242535