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Re: how to change register allocation order
hi, Oliva:
But in the machine description files, there are only four classes of
regs. NO_REGS, GENERAL_REGS,FPU_REGS and ALL_REGS. It's strange why the
MACRO REG_ALLOC_ORDER is no effect at all. And there are other strange
things. In arm, arg registers are r0-r3, while in our CPU they are r25-r28.
I changed the MACRO FUNCTION_ARG_REGNO_P (REGNO), it's no effect either !!
why? Can someone help me??
Many many thanks!!!
Must be non-zero if REGNO is one of the
> On May 25, 2001, "zhang tao" <warmice@sina.com> wrote:
>
> > I found although I changed the MACRO REG_ALLOC_ORDER, there is no
> > effect at all.
>
> Well, that's the macro you should be changing to modify register
> allocation order. Perhaps you've got multiple register classes, and
> one is taking precedence because of register preferences in patterns?
> This would prevail over REG_ALLOC_ORDER.
>
> --
> Alexandre Oliva Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
> Red Hat GCC Developer aoliva@{cygnus.com, redhat.com}
> CS PhD student at IC-Unicamp oliva@{lsd.ic.unicamp.br, gnu.org}
> Free Software Evangelist *Please* write to mailing lists, not to me
>
>