Fix fdump-passes

Fix fdump-passes

2015-04-15  Tom de Vries  <tom@codesourcery.com>

	PR other/65487
	* function.c (push_dummy_function): New function.
	(init_dummy_function_start): Use push_dummy_function.
	(pop_dummy_function): New function.  Factored out of ...
	(expand_dummy_function_end): ... here.
	* function.h (push_dummy_function, pop_dummy_function): Declare.
	* passes.c (pass_manager::dump_passes): Use push_dummy_function and
	pop_dummy_function.
	* tree-chkp.c (chkp_gate): Handle cgraph_node::get (cfun->decl) == NULL.

From-SVN: r222129