2017-12-27  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/83552
	* tree-ssa-strlen.c (fold_strstr_to_strncmp): Assign result
	of get_string_lenth to a SSA_NAME if not a GIMPLE value.
2017-12-27  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/83552
	* gcc.dg/pr83552.c: New test.

From-SVN: r256009