IRA_COVER_CLASSES for score

[liqin@sunnorth.com.cn]

Commit IRA_COVER_CLASSES for score.

liqin.


gcc-patches-owner@gcc.gnu.org 写于 2008-11-29 10:20:07:

> This defines IRA_COVER_CLASSES for score. 
> 
> liqin
> 
> 2008-11-29  Chen Liqin  <liqin@sunnorth.com.cn>
> 
>         * config/score/score.h (IRA_COVER_CLASSES): Define.
> 
> 
> Index: gcc/config/score/score.h
> ===================================================================
> --- gcc/config/score/score.h    (revision 142255)
> +++ gcc/config/score/score.h    (working copy)
> @@ -438,6 +438,18 @@ enum reg_class
>     also contains the register.  */
>  #define REGNO_REG_CLASS(REGNO)         score_reg_class (REGNO)
> 
> +/* The following macro defines cover classes for Integrated Register
> +   Allocator.  Cover classes is a set of non-intersected register
> +   classes covering all hard registers used for register allocation
> +   purpose.  Any move between two registers of a cover class should be
> +   cheaper than load or store of the registers.  The macro value is
> +   array of register classes with LIM_REG_CLASSES used as the end
> +   marker.  */
> +#define IRA_COVER_CLASSES                                      \
> +{                                                              \
> +  G32_REGS, CE_REGS, SP_REGS, LIM_REG_CLASSES                  \
> +}
> +
>  /* A macro whose definition is the name of the class to which a
>     valid base register must belong.  A base register is one used in
>     an address which is the register value plus a displacement.  */