[tree-ssa] More CFG improvements [patch]

[Diego Novillo]

On Tue, 04 Feb 2003, Jeff Law wrote:

> Cool.  Thanks.  20001226-1.c now compiles to completion with -O2 in just
> under 4 minutes (non-profiled) on my little 1Ghz machine:
>
You're using the wrong hardware.  It takes 1:46 minutes on my P4  ;)

> I'm going to revisit the aliasing code and try my idea of reducing
> the iteration space by tracking loads and stores separately.  In theory
> if it works we should get our may alias information in a few seconds
> (and it should help other code as well).
> 
OK.  I'll be doing a couple of tests with the alias sets idea.
If it works, I'll post a detailed summary.


> Once that's done I'll pop back to the dominance code and revisit
> get_dominated_by vs your sparse bitmap.
> 
Sounds good.


Diego.