tree-ssa performance (was: treelang fix for rs6000 / treelang not proper front end)

[Diego Novillo]

On Tue, 2003-06-10 at 12:18, Andrew MacLeod wrote:

> FWIW, The very limited amount of compile time experience Ive got (an
> early cut at reducing compile time for out-of-SSA) indicated that
> tree-ssa requires more memory. If you have a smaller memory machine, its
> compile times shoot up quite a bit due to swapping. On machines where it
> can compile without swapping, compiles times are not so bad.
> 
Perhaps.  The machines that run SPEC are not small.  The SPEC95 machine
has 256Mb of RAM.  The SPEC2k machine has 1Gb of RAM.

We get comparable results in both machines.  From what I've seen,
anything below 128Mb would cause the machine to swap itself silly while
bootstrapping.


Diego.