PR sanitizer/70683
	* tree-core.h (enum operand_equal_flag): Add OEP_NO_HASH_CHECK.
	* fold-const.c (operand_equal_p): If flag_checking and
	OEP_NO_HASH_CHECK is not set in flag, recurse with OEP_NO_HASH_CHECK
	and if it returns non-zero, assert iterative_hash_expr on both
	args is the same.

From-SVN: r235507