tem = expand_shift (LSHIFT_EXPR, mode, accum,
build_int_2 (log, 0), NULL_RTX, 0);
accum = force_operand (gen_rtx_PLUS (mode, accum, tem),
tem = expand_shift (LSHIFT_EXPR, mode, accum,
build_int_2 (log, 0), NULL_RTX, 0);
accum = force_operand (gen_rtx_PLUS (mode, accum, tem),