Re: Faster compilation speed

[Stan Shebs <shebs at apple dot com>]

Aldy Hernandez wrote:

> [...]
>
>   So... Don't you think that if we spent more
> time getting the infrastructure faster, -O0 will improve as well?
Well sure, it should be part of the plan.

One of my suspicions is that the massive use of macros in tree
and RTL is concealing excessive pointer chasing, because they
don't show up in either profile or coverage numbers.  So Devang
is taking the macros that we function-ized for debugging purposes
(Ira posted it to gcc-patches some time ago, but nobody wanted it
because dwarf2 macro debugging was going to be available RSN), and
will build a (slow) GCC that will do it all through function calls.
That should yield a much more interesting profile.

I don't think Mike mentioned it, but speeding up the compiler has
become our group's top priority, and every idea is on the table
right now.  The 6x goal sounds extreme, but it helps keep in mind
that one or two or even a dozen 5% improvements will not be
sufficient to attain parity with the competition.

Stan