[Bug target/50182] Performance degradation from gcc 4.1 (x86_64)

[xinliangli at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50182

--- Comment #15 from davidxl <xinliangli at gmail dot com> 2011-10-21 23:02:16 UTC ---
(In reply to comment #14)
> (In reply to comment #13)
> > David, it looks like we are seeing different things with v4.7... See my 
> > comment 11 - I am still observing the slowdown. Do you have access to 
> > v4.1 and v4.6? Could you try reproducing my test please?
> 
> Sorry for the delay -- I am pretty swamped these days (till mid October). I
> will try to look at the problem more then.
> 
> David


I still can not reproduce the problem with trunk compiler:


rv=4282167296

test         description   absolute   operations   ratio with
number                     time       per second   test0

 0 "int8_t constant add"   1.09 sec   1467.89 M     1.00

Total absolute time for int8_t constant folding: 1.09 sec


Can you attach the output of -v and the assembly file with -fverbose-asm -dA
and the optimized dump file with option -fdump-tree-optimized-blocks using
trunk compiler?

thanks,

David