gcc/testsuite/ChangeLog:

	PR tree-optimization/94131
	* gcc.dg/pr94131.c: New test.

gcc/ChangeLog:

	PR tree-optimization/94131
	* gimple-fold.c (get_range_strlen_tree): Fail for variable-length
	types and decls.
	* tree-ssa-strlen.c (get_range_strlen_dynamic): Avoid assuming
	types have constant sizes.