[RFC/patch] Callgraph based inlining heuristics

[Gerald Pfeifer]

On Mon, 23 Jun 2003, Jan Hubicka wrote:
> I tested libstdc++ compilation with -O2 and get 10% savings of the .so
> library size (with debug info in) and about 5% compiler speedup.  I also
> tried PR/8362 testcase. With -O2 -fno-unit-at-a-time I get:

That's 8361, right?

>  TOTAL                 : 134.67             2.86           137.79
>
> With -O2 -funit-at-a-time I get:
>
>  TOTAL                 :  92.61             3.19            96.50
>
> And I get 24% fewer instructions produced.

Wow, that's impressive! How's the situation for -O3 (because only for
-O3 do we full inlining, as far as I understood)?

> I also tested it on some of C SPEC2000 sources and it does not seem to
> supress any important inlining.  I hope to do some behchmarking tomorrow
> as I need some sleep now.

If you send me (privately) the full set of patches required for this, I'll
happily perform testsuite runs and benchmarks for the full application
which contains the code of PR/8361.

This looks very exciting!

Gerald