graphite-isl-ast-to-gimple.c: Add inclusion of gimple-ssa.h, tree-into-ssa.h.

graphite-isl-ast-to-gimple.c: Add inclusion of gimple-ssa.h, tree-into-ssa.h.

	gcc/
	* graphite-isl-ast-to-gimple.c:
	Add inclusion of gimple-ssa.h, tree-into-ssa.h.
	(ivs_params_clear):
	(build_iv_mapping): New function.
	(translate_isl_ast_node_user): Likewise.
	(translate_isl_ast): Add calling of translate_isl_ast_node_user.

	gcc/testsuite/gcc.dg/graphite/
	* isl-ast-gen-single-loop-1.c: New testcase.
	* isl-ast-gen-single-loop-2.c: New testcase.
	* isl-ast-gen-single-loop-3.c: New testcase.

From-SVN: r212904