[Patch, Fortran, OOP] PR 54667: gimplification failure with c_f_pointer

[Janus Weil]

Hi all,

this patch fixes an ICE recently reported by Andrew Benson. It does so
by rejecting polymorphic arguments to the C_F_POINTER intrinsic. For
discussion and standard references, please refer to the PR and today's
email thread.

Apart from fixing this PR, the patch modifies two other error messages
related to C_F_POINTER (adding the name of the formal arg in the
message and applying correct Fortran terminology through the
replacement 'parameter' -> 'argument'). It also fixes the grammar in
the documentation of C_F_POINTER.

Regtested on x86_64-unknown-linux-gnu. Ok for trunk?

Cheers,
Janus


2012-09-22  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/54667
	* intrinsic.texi (C_F_POINTER): Fix description.
	* resolve.c (gfc_iso_c_sub_interface): Add a check for FPTR argument
	of C_F_POINTER. Modify two error messages. Cleanup.

2012-09-22  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/54667
	* gfortran.dg/c_funloc_tests_6.f90: Modified error message.
	* gfortran.dg/c_f_pointer_shape_test.f90: Ditto.
	* gfortran.dg/c_f_pointer_tests_5.f90: New.
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