Fix GOMP/GOACC_parallel optimization in ipa-pta

Fix GOMP/GOACC_parallel optimization in ipa-pta

2016-02-09  Tom de Vries  <tom@codesourcery.com>

	PR tree-optimization/69599
	* tree-ssa-structalias.c (fndecl_maybe_in_other_partition): New
	function.
	(find_func_aliases_for_builtin_call, find_func_clobbers)
	(ipa_pta_execute):  Handle case that foo and foo._0 are not in same lto
	partition.

	* testsuite/libgomp.c/omp-nested-3.c: New test.
	* testsuite/libgomp.c/pr46032-2.c: New test.
	* testsuite/libgomp.oacc-c-c++-common/kernels-2.c: New test.
	* testsuite/libgomp.oacc-c-c++-common/parallel-2.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@233240 138bc75d-0d04-0410-961f-82ee72b054a4