re PR tree-optimization/82819 ([graphite] ICE in set_codegen_error, at graphite-isl-ast-to-gimple.c:206)

2018-01-24  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/82819
	* graphite-isl-ast-to-gimple.c (binary_op_to_tree): Avoid
	code generating pluses that are no-ops in the target precision.

	* gcc.dg/graphite/pr82819.c: New testcase.

From-SVN: r257012