Fix PR42637.

Fix PR42637.

2010-02-05  Sebastian Pop  <sebastian.pop@amd.com>
	    Konrad Trifunovic  <konrad.trifunovic@inria.fr>

	PR middle-end/42637
	* graphite-dependences.c (build_lexicographical_constraint): Return
	a union of dependence polyhedra.
	(dependence_polyhedron_1): Adapt for build_lexicographical_constraint.

	* testsuite/gcc.dg/graphite/block-0.c: Enable runtime check.  XFAILed.
	* testsuite/gcc.dg/graphite/block-4.c: Same.
	* testsuite/gcc.dg/graphite/block-7.c: Same.
	* testsuite/gcc.dg/graphite/interchange-12.c: Same.
	* testsuite/gcc.dg/graphite/interchange-mvt.c: Same.
	* testsuite/gfortran.dg/graphite/interchange-1.f: XFAILed.
	* testsuite/gfortran.dg/graphite/interchange-3.f90: XFAILed.
	* testsuite/gfortran.dg/graphite/run-id-1.f: New testcase for PR42637.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/graphite@156538 138bc75d-0d04-0410-961f-82ee72b054a4