Fix Thumb2 bic orn

2009-05-20  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
    
	* config/arm/arm.md (*arm_iorsi3): Refactored for only ARM.
        (peephole ior (reg, int) -> mov, ior): Refactored for only ARM.
        * config/arm/thumb2.md (*thumb_andsi_not_shiftsi_si): Allow bic
        with shifts for Thumb2.
        (orsi_notsi): New for orn.
        (*thumb_orsi_notshiftsi_si): Allow orn with shifts.
        (*thumb2_iorsi3): Rewrite support for iorsi for Thumb2.
        * config/arm/arm.c (const_ok_for_op): Split case for IOR for
        Thumb2.
        (arm_gen_constant): Set can_invert for IOR and Thumb2, Add
        comments. Don't invert remainder for IOR.

From-SVN: r147729