PATCH RFA: Increase support for restrict qualifier
Richard Henderson
rth@redhat.com
Sun Oct 2 08:50:00 GMT 2005
On Sat, Oct 01, 2005 at 09:53:53PM -0700, Ian Lance Taylor wrote:
> > I'd hope it's possible to write a testcase for the optimization
> > improvements in the present patch as well.
>
> I don't know. The real optimization improvement is in the scheduler
> which will no longer see dependencies which it formerly saw.
It's usually easier to write aliasing test cases with copy/constant
propagation and dead code elimination. The general form is
x = 0;
y = 1;
if (x != 0)
link_error ();
where x and y are the two things you want to affirm do not alias.
r~
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