optimization/9319: slower code generated for simple loop on linux

[Eric Botcazou]

> I have done a few more tests, and it seems
> that this is a regression
> on all platforms  (not just intel) introduced by
> gcc3.1

Confirmed. The regression actually started to show up in gcc 3.0.4 (that's why 
I asked you to post the assembly code, I only had the 3.0.4 version on my 
system) and has affected all versions since then.

> The performance is significantly reduced on intel
> linux and on Solaris (I have not sent solaris asm
> files, let me know if you need them). So I do
> not think that this is architecture related

A nasty side-effect of the patch that fixed PR optimization/5076, which was 
foreseen by Richard: http://gcc.gnu.org/ml/gcc-patches/2002-01/msg02111.html

Richard, do you think that the problem is worth looking into or that it is a 
lost cause ?

-- 
Eric Botcazou