[PATCH][varmap] Some cleanups

[Richard Guenther]

On Dec 12, 2007 10:50 PM, Sebastian Pop <sebpop@gmail.com> wrote:
> Hi,
>
> I went over the changes in the varmap branch, and added some
> missing comments.  Patch attached.

This is ok to apply - thanks.

> There are a few new htabs that attach bitmaps to decls, and this could
> increase unexpectedly the compiler memory.  Do you have some numbers
> for the compile-time memory usage with the code in the branch?

I only did some statistics on what percentage of decls get a bitmap and with
how many bits it is populated.  For the current state of the branch it was less
than 1% of the decls (tramp3d has around 1M decls in total) and the average
number of bits was around 3 (the maximum was around 17).  So certainly a
more memory efficient (or also performant) representation may be better
in the end.

To say - we're still in the prototype phase and the final part (making
var-tracking
and dwarf2out benefit from the extra information) is not yet on the branch.

Thanks,
Richard.