Add initial constraints in create_function_info_for

Add initial constraints in create_function_info_for

2015-10-31  Tom de Vries  <tom@codesourcery.com>

	* tree-ssa-structalias.c (ipa_pta_execute): Add extra arg to call to
	create_function_info_for.  Dump constraints generated during
	create_function_info_for. Move intra_create_variable_infos call and
	function-return-values-escape bit to ...
	(create_function_info_for): ... here, and merge
	intra_create_variable_infos call with argument loop.  Add and handle
	nonlocal_p parameter.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@229619 138bc75d-0d04-0410-961f-82ee72b054a4