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Re: [tree-ssa]: Reduce size of phi nodes by 31 bits
On Tue, 30 Dec 2003, Richard Henderson wrote:
> On Mon, Dec 29, 2003 at 07:12:01PM -0500, Daniel Berlin wrote:
> > - int rewritten;
> > + unsigned int rewritten:1;
> >
> > struct phi_arg_d GTY ((length ("((tree)&%h)->phi.capacity"))) a[1];
>
> You will note that this doesn't reduce the size of anything.
> Just exchanges data for padding.
Given.
But we both know that someone will come along later and add a new
field to the phi nodes that could have used that padding, but is now
increasing the size.
>
> r~
>