re PR tree-optimization/50913 (ICE in scan_tree_for_params_right_scev, at graphite-sese-to-poly.c:633 compiling libgfortran with -floop-interchange -m32)

2012-01-10  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/50913
	* graphite-scop-detection.c (stmt_has_simple_data_refs_p):
	Require data-refs to be representable by Graphite with respect
	to any loop nest.

	* gcc.dg/graphite/interchange-16.c: New testcase.
	* gcc.dg/graphite/scop-20.c: XFAIL.
	* gfortran.dg/graphite/interchange-1.f: Likewise.
	* gfortran.dg/graphite/block-1.f90: Likewise.
	* gfortran.dg/graphite/block-2.f: Likewise.

From-SVN: r183055