expr.c (expand_expr, [...]): Refine the test forcing usage of bitfield instructions for mode1 != BLKmode...

        * expr.c (expand_expr, case BIT_FIELD_REF): Refine the test forcing
        usage of bitfield instructions for mode1 != BLKmode, only ignoring
        SLOW_UNALIGNED_ACCESS if the field is not byte aligned.
        (store_field): Likewise.

From-SVN: r66492