From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM
	autolearn=ham autolearn_force=no version=3.4.4
X-Google-Thread: a07f3367d7,103803355c3db607
X-Google-Attributes: gida07f3367d7,public,usenet
X-Google-NewGroupId: yes
X-Google-Language: ENGLISH,ASCII-7-bit
Received: by 10.224.182.77 with SMTP id cb13mr1323546qab.5.1343313384582;
        Thu, 26 Jul 2012 07:36:24 -0700 (PDT)
Received: by 10.66.74.40 with SMTP id q8mr1617437pav.19.1343313384326;
        Thu, 26 Jul 2012 07:36:24 -0700 (PDT)
Path: 
 a15ni105485768qag.0!nntp.google.com!q21no14513954qas.0!news-out.google.com!b9ni64802036pbl.0!nntp.google.com!border1.nntp.dca.giganews.com!border4.nntp.dca.giganews.com!border2.nntp.dca.giganews.com!border2.nntp.ams.giganews.com!nntp.giganews.com!newsfeed.straub-nv.de!news.swapon.de!news.glorb.com!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail
From: Keean Schupke <keean.schupke@googlemail.com>
Newsgroups: comp.lang.ada
Subject: Re: GNAT (GCC) Profile Guided Compilation
Date: Thu, 19 Jul 2012 03:18:00 -0700 (PDT)
Organization: http://groups.google.com
Message-ID: <1d43d50c-1447-43c9-8370-9a5ce81d2879@googlegroups.com>
References: <dac2857a-6f74-4ecb-a5d2-f6b73fbd0ecc@googlegroups.com>
 <520bdc39-6004-4142-a227-facf14ebb0e8@googlegroups.com>
 <4ff08cb2$0$6575$9b4e6d93@newsspool3.arcor-online.net>
 <a4f2a43e-5593-48f6-9e0f-7d0057874f94@googlegroups.com>
 <4ff1d731$0$6582$9b4e6d93@newsspool3.arcor-online.net>
 <cdbe38d2-c8b0-41b2-9830-d913aefa200c@googlegroups.com>
 <fed934c8-9cff-4905-811d-9f9d3050d0b1@googlegroups.com>
 <4ff41d38$0$6577$9b4e6d93@newsspool3.arcor-online.net>
 <26b778c4-5abc-4fbf-94b0-888c2ce71831@googlegroups.com>
 <4ff43956$0$6576$9b4e6d93@newsspool3.arcor-online.net>
 <2dba1140-4f28-4fb8-ace4-2c10f3a02313@googlegroups.com>
 <a6e3v8FvsvU1@mid.individual.net>
 <e70a8424-47df-4141-a0ac-2e0bc6fbfc77@googlegroups.com>
 <e215fb37-2e94-464c-bfc0-2298a415d874@googlegroups.com>
 <a6f90pFj55U1@mid.individual.net>
 <505460ad-495d-41b4-a88f-e95eb99a6be3@googlegroups.com>
 <50068967$0$9507$9b4e6d93@newsspool1.arcor-online.net>
 <b2c3f20c-3d66-4558-9ddf-13a826f25283@googlegroups.com>
 <50079e21$0$9502$9b4e6d93@newsspool1.arcor-online.net>
NNTP-Posting-Host: 91.143.78.202
Mime-Version: 1.0
X-Trace: posting.google.com 1342693080 30492 127.0.0.1 (19 Jul 2012 10:18:00
 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Thu, 19 Jul 2012 10:18:00 +0000 (UTC)
In-Reply-To: <50079e21$0$9502$9b4e6d93@newsspool1.arcor-online.net>
Complaints-To: groups-abuse@google.com
Injection-Info: glegroupsg2000goo.googlegroups.com;
 posting-host=91.143.78.202;
 posting-account=T5Z2vAoAAAB8ExE3yV3f56dVATtEMNcM
User-Agent: G2/1.0
Content-Type: text/plain; charset=ISO-8859-1
Date: 2012-07-19T03:18:00-07:00
List-Id: <comp.lang.ada>

On Thursday, 19 July 2012 06:42:05 UTC+1, Georg Bauhaus  wrote:
> On 18.07.12 19:36, Keean Schupke wrote:
> &gt; I think if you use -O3 -gnatn (and pragma Inline(X)) the function will be inlined. Does it still make a difference then?
> 
> It did. In particular, A_T_A_Conversion seemed to need -gnatN.
> The differences were small, in a range between .67s and .73s
> for 50_000_000 iterations, trying a number of combinations of
> switches. I haven&#39;t tried profile guided optimization, though.

Here's my makefile if its useful:


test: test.adb
    rm -f *.gcda
    gnatmake -march=native -O3 -fprofile-generate -ftest-coverage -gnatp -gnatn test -bargs -shared -cargs -fdata-sections -ffunction-sections -largs -Wl,--gc-sections
    ./test
    touch test.adb
    gnatmake -march=native -O3 -fprofile-use -gnatp -gnatn test -bargs -shared -cargs -fdata-sections -ffunction-sections -largs -Wl,--gc-sections


Cheers,
Keean.