re PR tree-optimization/88651 (tree-data-ref.c:3764:26: runtime error: signed integer overflow: 9223372036854775802 - -6 cannot be represented in type 'long int')

2019-01-02  Richard Biener  <rguenther@suse.de>

	PR middle-end/88651
	* tree-data-ref.c (analyze_subscript_affine_affine): Use
	widest_ints when mangling max_stmt_execution results.

From-SVN: r267512