On 3/9/06, Joe Buck <[EMAIL PROTECTED]> wrote:
> > Profile information isn't always available.
On Thu, Mar 09, 2006 at 06:26:27PM +0100, Steven Bosscher wrote:
> But branch predictions are, and those are still far more reliable than loop
> notes. The predictions use natural loop discovery and the
> > I see that flow no longer uses loop_depth when computing REG_N_REFS,
> >
> > That strikes me as wrong. Don't we want to give pseudos that are in loops
> > preference over those that aren't?
>
On Thu, Mar 09, 2006 at 09:12:35AM +0100, Zdenek Dvorak wrote:
> we have much more reliable he
Hello,
> I see that flow no longer uses loop_depth when computing REG_N_REFS,
>
> That strikes me as wrong. Don't we want to give pseudos that are in loops
> preference over those that aren't?
we have much more reliable heuristic based on profile information for some time
now.
Zdenek
I see that flow no longer uses loop_depth when computing REG_N_REFS,
That strikes me as wrong. Don't we want to give pseudos that are in loops
preference over those that aren't?
Bernd Schmidt wrote:
Do we have a replacement for this heuristic?
I see REG_FREQ, which is computed from some basic block frequency info.
--
Jim Wilson, GNU Tools Support, http://www.specifix.com
Jim Wilson wrote:
I see that flow no longer uses loop_depth when computing REG_N_REFS, so
the original reason for the sched support seems to be gone.
Do we have a replacement for this heuristic?
Bernd
Zdenek Dvorak wrote:
*sched* -- no idea what happens there; it seems to make REG_SAVE_NOTE
notes from loop notes, and then makes some magic, but I do not
understand what and why.
The loop notes are converted into REG_NOTES, and attached to an adjacent
instruction. The REG_SAVE_NOTES are t
Zdenek Dvorak wrote:
Hello,
here is a proposal for the patch to remove loop notes (I still need to
benchmark it, and probably split into smaller parts). However, I do not
understand some of the code from that it removes loop note usage, so I
would appreciate comments on them:
cse.c:cse_end_of_
Hello,
here is a proposal for the patch to remove loop notes (I still need to
benchmark it, and probably split into smaller parts). However, I do not
understand some of the code from that it removes loop note usage, so I
would appreciate comments on them:
cse.c:cse_end_of_basic_block -- somethin
