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Re:


From: Matt Austern
Subject: Re:
Date: Fri, 7 Mar 2003 13:19:03 -0800

On Friday, March 7, 2003, at 01:12  PM, Richard Guenther wrote:

Hi!

GCC is not very smart at inlining, and with not tuning -finline-limit you
get (due to top-down inlining) trivial methods like FillLocStorageImpl
stuff and even ~Loc<1> not inlined which hurts performance a lot. GCC as
of version 3.2 (I think) has the ability to mark functions as "always
inline". This unfortunately cannot be turned on by sth like #define inline __attibute__((always_inline)), but needs to be manually done. Candidates
would be all Domain related stuff and possibly Mesh and Engine stuff as
well (yes - I get non-inlined Engine::read()s, too...).

Seems like a mess to me (note: intel icpc isnt any better here). I hope
we can sneak something like the -fobey-inline patch from Matt Austern
(see http://gcc.gnu.org/ml/gcc/2003-02/msg01666.html for discussion,
havent found the actual patch, Matt?) into gcc 3.3/3.4... Mark?

The reason you haven't found the patch is that I didn't submit it.
Stuart Hastings (also from Apple) submitted it.  So far it's neither
been approved nor rejected.

                        --Matt

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