This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: [RFC] Contributing tree-ssa to mainline
On Sat, 17 Jan 2004, Daniel Jacobowitz wrote:
> On Fri, Jan 16, 2004 at 07:19:01PM -0500, Diego Novillo wrote:
> >
> > Now that we are about to enter Stage 1 of 3.5, I wanted to solicit
> > feedback regarding the merge of the tree-ssa branch into mainline.
>
> I'd like to offer another perspective, only slightly different. Some
> people are concerned, rightly, about the bugs that will be caused by
> merging tree-ssa for 3.5. But I'm concerned about the bugs that will
> be neglected by not merging it.
While I'm surely affected by these "bugs" (C++ with POOMA) and I'm looking
forward to some performance improvements with tree-ssa my experience with
tree-ssa for now is not so good in terms of time and memory consumption.
I'd rather suggest to go for a "quick" 3.5 release with rtlopt and maybe
new-ra merged, because while 3.4 is of superior quality compared to 3.3
for me, it quite seriously regressed in resulting performance. This is
mainly due to the new loop-unroller which is said to be "fixed" on rtlopt
branch.
Tree-ssa needs to go to something like stage 3 (or at least stage 2) for
some time before it looks ready for me.
Just my 2 euro-cents,
Richard.