alias slowdown?

[Daniel Berlin]

On 11/17/06, Andrew MacLeod <amacleod@redhat.com> wrote:
> On Fri, 2006-11-17 at 12:22 -0500, Andrew MacLeod wrote:
> > I just tried compiling cplusplus_grammer.ii with mainline, checking
> > disabled, and had to stop it after 30 minutes (use to be <50 seconds on
> > my x86-linux box).  A quick check with GDB seems to show that its
> > spending in inordinate amount of time in may_alias:

We used to basically say all of these cases pointed to everything and
anything, and collapse them very quickly.
Now we compute  a correct set of aliases and escaped variables
It takes a while in huge cases like this.
I'm working on fixing it.