Re: Kernel GCC Optimizations

From: Adam Majer (adamm@galacticasoftware.com)
Date: Wed Dec 25 2002 - 01:16:41 EST


On Sun, Dec 22, 2002 at 01:23:08PM +0000, Joao Seabra wrote:
> Rename registers from the gcc 3.2 man:
> "Attempt to avoid false dependencies in scheduled code by making
> use of registers left over after register allocation. This
> optimization will most benefit processors with lots of
> registers. It can, however, make debugging impossible, since
> variables will no longer stay in a "home register"."

Just to be blunt here :), i386 is not one of these register rich
archs. So it will probably not help you to compile with -O3... Of course
you could have something else...

- Adam
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Tue Dec 31 2002 - 22:00:07 EST