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Re: GCC inline parameters (PR 10160 testcase)
- From: Steven Bosscher <s dot bosscher at student dot tudelft dot nl>
- To: Andreas Jaeger <aj at suse dot de>
- Cc: John David Anglin <dave at hiauly1 dot hia dot nrc dot ca>, gcc at gcc dot gnu dot org,gcc-patches at gcc dot gnu dot org, mark at codesourcery dot com
- Date: 02 May 2003 21:10:41 +0200
- Subject: Re: GCC inline parameters (PR 10160 testcase)
- References: <200305021825.h42IPmxv027818@hiauly1.hia.nrc.ca> <u8ptn1i4lk.fsf@gromit.moeb>
Op vr 02-05-2003, om 20:30 schreef Andreas Jaeger:
> What kind of performance difference does this give us? I fear that
> this change will speed up compilation but slow down execution and
> would therefore like to see some performance data of compiled code
> also.
It is a real shame that this has to come up so late in the preparation
for 3.3, because these issues have been known for almost a year now.
Well, we'll never know until somebody benchmarks different settings.
I've asked a couple of weeks ago if anybody had done some timings with
different inline parameter settings, and there was _no_ reply at all.
Ought so have seen at least a few for something so often debated in this
mailing list as tree inlining issues...
Apparently nobody has the numbers, and nobody can tell what TRT is until
we _do_.
What would be good testcases, i.e. some representative piece of code
that is easy to measure runtime for? Maybe your SPEC tester could be
tweaked to test a bunch of different inline parameter settings?
Greetz
Steven