This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
Re: PATCH: Devirtualization using profiling feedback
- From: Mike Stump <mrs at apple dot com>
- To: Tomas Bily <tbily at suse dot cz>
- Cc: "gcc-patches at gcc dot gnu dot org Patches" <gcc-patches at gcc dot gnu dot org>, Jan Hubicka <jh at suse dot cz>, Jan Hubicka <hubicka at ucw dot cz>
- Date: Thu, 27 Oct 2005 14:39:21 -0700
- Subject: Re: PATCH: Devirtualization using profiling feedback
- References: <20051027133259.GA25844@atrey.karlin.mff.cuni.cz>
On Oct 27, 2005, at 6:33 AM, Tomas Bily wrote:
if (actual_callee_addres == addres_of_most_common_function/method)
do direct call
else
old call
Hum.... It would be nice to issue a conditional that is type based,
then, you can hoist like conditionals out, say, of loops and combine
them. Say, something like:
if (vtable_pointer == B_vtable)
do direct call to B_vtable[idx]
else
old call
d.fun1();
d.fun2();
d.fun3();
then becomes:
if (d.vtblp == D)
D::foo1();
D::foo2();
D::foo3();
else
...