IRA for GCC 4.4

[Vladimir Makarov]

FX wrote:
>
> PS: I attach the file containing all timings. For each set of option,
> I ran the compiler twice; when timings differ significantly, that's
> because of other users using the machine (which is a rather underused
> dual-core biprocessor, with an average load during my tests of 1.09),
> and I thus take the smallest number for calculations.
>
>   
Thanks for testing IRA.  As I understand, in

# f951 135.59 6.88

the first number is wall compilation time.  Could you tell me what is 
the second one? Is it system time?

I am trying to analyze the results and it would be useful to know what 
kind of processor did you use (AMD or Intel, what model).

As for -O0, IRA does absolutely the same when -fira-algorithm=CB is used 
or not.

Thanks again for the testing.  I'll look forward for your results for 
Polyhedron benchmark.  I should acknowledge that I never tested it.  My 
observation of SPECFP2000 results, IRA gives less improvement than for 
SPECINT2000.  As I understand floating point benchmarks are more memory 
bound and RA could not help a lot.  More important is to have memory 
hierarchy optimizations for them.