[fortran-dev, patch] PR32890 - add simplifier and argument check for PACK

[Daniel Franke]

Attached patch adds a simplifier for the PACK intrinsic and implements 
additional compile-time argument checks.


2009-03-23  Daniel Franke  <franke.daniel@gmail.com>

	PR fortran/32890
	* intrinsic.h (gfc_simplify_pack): New prototype.
	* intrinsic.c (add_functions): Added simplifier-callback to PACK.
	* simplify.c (is_constant_array_expr): Moved to beginning of file.
	(gfc_simplify_pack): New.
	* check.c (gfc_check_pack): Check that VECTOR has enough elements.

2009-03-23  Daniel Franke  <franke.daniel@gmail.com>

	PR fortran/32890
	* gfortran.dg/pack_assign_1.f90: New.
	* gfortran.dg/pack_vector_1.f90: New.


Bootstrapped and regression tested on i686-pc-linux-gnu.
Ok for dev and 4.5?

Cheers

	Daniel
  

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