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Re: PATCH RFC: My version of the lower-subreg patch
Rask Ingemann Lambertsen <firstname.lastname@example.org> writes:
> On Fri, Dec 15, 2006 at 06:05:25PM -0800, Ian Lance Taylor wrote:
> > Anyhow, I wanted to put this patch out for comments, to see what
> > people think of it.
> I would like to have an option -f[no-]lower-subreg so I can easily
> compile code with and without the subreg lowering pass for comparison
Good idea. In the version I just sent out I added -fsplit-wide-types,
defaulting to on with -O1 and above. I didn't use the name
-flower-subreg because I don't think it is meaningful to users. I'd
be happy to hear other suggestions for the option name.
> so I applied this on top of your patch:
Thanks, I added this.
> So the change is rejected, which trips the assert. I solved it by
> reordering the two movhi variants. Other targets might run into the same
Interesting issue. I think most targets will handle this just by
using alternatives, though I understand that won't work for you
because of the additional CLOBBER.
Thanks for the feedback.