Re: RFC: cache uses_template_parms in tree node?

[Mark Mitchell <mark at codesourcery dot com>]

Richard Guenther wrote:

> Hi!
>
> To address the for_each_template_parm() performance problem, would it be
> possible to cache the outcome of uses_template_parms() in the tree
> node? Or would this caching somehow be invalidated later?

The right approach, as I've said before, is simply not to *use* 
for_each_template_parm.

It should be unncessary; the right approach should be to use 
type_dependent_p and its friends.

That's not a trivial change, but it's the right change.

There might be a very few places where for_each_template_parm would 
still be necessary -- but they will not be anything that should up on 
the profile.

--
Mark Mitchell
CodeSourcery, LLC
mark@codesourcery.com