Re: GCC Status Report (2004-10-26)

[Andrew MacLeod <amacleod at redhat dot com>]

On Tue, 2004-10-26 at 09:27, Andrew MacLeod wrote:
> On Tue, 2004-10-26 at 03:28, Mark Mitchell wrote:
> 
>         I have been informed that our SPEC benchmark results are looking
>         pretty good, which matches our independent observations.  However,
>         there are apparently regressions in perlbmk and mgrid.  Andy MacLeod
>         has a potential fix for the perlbmk problem here:
>         
>           http://gcc.gnu.org/ml/gcc-patches/2004-10/msg00488.html
>         
>         I intend to review this patch, if nobody else gets to it.
>         
> I considered it a new optimization, hence didn't submit it for 4.0
> review.  I've thought about it a couple of times since then, but never
> got around to sending you a note :-) 
> 
> It ought to be pretty safe if you want to add it to 4.0, it improves a
> number of things, not just perl.   Probably should have been done a long
> time ago, I just never thought of this solution before for some reason.
> :-)
> 
> I'll do a mainline version of it today, although I doubt its any
> different than the tcb version.  I'm not aware of any out-of-ssa
> variations between tcb and mainline.
> 

Sorry, Ive been waylaid a couple of days.

I bootstrapped and verified testsuite runs on a mainline build as of
monday. The original patch applied with no changes. Diego has been
running TCB with the patch for some time now on linux
ppc/x86-64/ia64/x86 with no problems I am aware of.

So it ought to be fine for 4.0 if you decide you want it.

Andrew