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Re: -fnew-ra -- which architectures?
- From: Daniel Berlin <dberlin at dberlin dot org>
- To: Falk Hueffner <falk dot hueffner at student dot uni-tuebingen dot de>
- Cc: gcc at gcc dot gnu dot org
- Date: Mon, 15 Jul 2002 20:02:37 -0400 (EDT)
- Subject: Re: -fnew-ra -- which architectures?
On 16 Jul 2002, Falk Hueffner wrote:
> Daniel Berlin <dberlin@dberlin.org> writes:
>
> > > Thanks, this fixes the problem. Improvements are moderate on my test
> > > case, though:
> > >
> > > number of stack writes
> > > gcc -O1 0
> > > Compaq Compiler 11 (the caller saved registers)
> > > gcc -O3 119
> > > gcc -O3 -fnew-ra 101
> > >
> > > Are you interested in the test case?
> >
> > SUre, if course like, though a 20% reduction is nothing to sneeze
> > at.
>
> It would be great normally, but in this case, most or all of the
> stores could be eliminated, as -O1 shows, and I had hoped the new
> regalloc would manage that.
I'll need to see the case.