* tree-core.h (size_type_kind): Remove OEP_CONSTANT_ADDRESS_OF and
	add OEP_MATCH_SIDE_EFFECTS.
	* fold-const.c (operand_equal_p): Update documentation; handle
	OEP_MATCH_SIDE_EFFECTS.
	* tree-ssa-tail-merge.c (gimple_operand_equal_value_p): Use
	OEP_MATCH_SIDE_EFFECTS.

From-SVN: r229867