Re: "undefined behavior"?

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Sujet : Re: "undefined behavior"?
De : Keith.S.Thompson+u (at) *nospam* gmail.com (Keith Thompson)
Groupes : comp.lang.c
Date : 14. Jun 2024, 01:47:30
Autres entêtes
Organisation : None to speak of
Message-ID : <87cyok5rsd.fsf@nosuchdomain.example.com>
References : 1 2 3 4
User-Agent : Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux)
David Brown <david.brown@hesbynett.no> writes:
[...]
      Certainly "-O3" is rarely worth it unless you are also using a
"-march=" flag (such as "-fmarch=native") to tune for a particular
processor and enable stuff like vectorisation.  Getting the fastest
code is more of an art than a science!

Typo: it's "-march=native".

--
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
void Void(void) { Void(); } /* The recursive call of the void */

Date Sujet#  Auteur
12 Jun 24 * "undefined behavior"?77DFS
12 Jun 24 +* Re: "undefined behavior"?39Barry Schwarz
12 Jun 24 i`* Re: "undefined behavior"?38DFS
13 Jun 24 i `* Re: "undefined behavior"?37Keith Thompson
13 Jun 24 i  `* Re: "undefined behavior"?36DFS
13 Jun 24 i   `* Re: "undefined behavior"?35Keith Thompson
13 Jun 24 i    `* Re: "undefined behavior"?34Malcolm McLean
13 Jun 24 i     +- Re: "undefined behavior"?1Ben Bacarisse
13 Jun 24 i     +* Re: "undefined behavior"?29bart
13 Jun 24 i     i+* Re: "undefined behavior"?22Malcolm McLean
13 Jun 24 i     ii+* Re: "undefined behavior"?2Chris M. Thomasson
14 Jun 24 i     iii`- Re: "undefined behavior"?1Malcolm McLean
14 Jun 24 i     ii`* Re: "undefined behavior"?19Ben Bacarisse
14 Jun 24 i     ii `* Re: "undefined behavior"?18Malcolm McLean
14 Jun 24 i     ii  `* Re: "undefined behavior"?17Ben Bacarisse
14 Jun 24 i     ii   +* Re: "undefined behavior"?13Malcolm McLean
14 Jun 24 i     ii   i+* Re: "undefined behavior"?4Richard Harnden
14 Jun 24 i     ii   ii`* Re: "undefined behavior"?3Malcolm McLean
14 Jun 24 i     ii   ii `* Re: "undefined behavior"?2bart
14 Jun 24 i     ii   ii  `- Re: "undefined behavior"?1Malcolm McLean
14 Jun 24 i     ii   i`* Re: "undefined behavior"?8Ben Bacarisse
15 Jun 24 i     ii   i `* Re: "undefined behavior"?7Malcolm McLean
15 Jun 24 i     ii   i  +- Re: "undefined behavior"?1Ben Bacarisse
15 Jun 24 i     ii   i  `* Re: "undefined behavior"?5David Brown
15 Jun 24 i     ii   i   `* Re: "undefined behavior"?4Richard Harnden
16 Jun 24 i     ii   i    +- Re: "undefined behavior"?1Ben Bacarisse
16 Jun 24 i     ii   i    `* Re: "undefined behavior"?2David Brown
16 Jun 24 i     ii   i     `- Re: "undefined behavior"?1Malcolm McLean
14 Jun 24 i     ii   `* Re: "undefined behavior"?3Chris M. Thomasson
14 Jun 24 i     ii    `* Re: "undefined behavior"?2Ben Bacarisse
15 Jun 24 i     ii     `- Re: "undefined behavior"?1Chris M. Thomasson
14 Jun 24 i     i`* Re: "undefined behavior"?6Keith Thompson
14 Jun 24 i     i +- Re: "undefined behavior"?1bart
14 Jun 24 i     i +* Re: "undefined behavior"?3David Brown
14 Jun 24 i     i i`* Re: "undefined behavior"?2Keith Thompson
15 Jun 24 i     i i `- Re: "undefined behavior"?1David Brown
14 Jun 24 i     i `- Re: "undefined behavior"?1Keith Thompson
13 Jun 24 i     `* Re: "undefined behavior"?3Keith Thompson
14 Jun 24 i      `* Re: "undefined behavior"?2Malcolm McLean
14 Jun 24 i       `- Re: "undefined behavior"?1Keith Thompson
12 Jun 24 +* Re: "undefined behavior"?15David Brown
13 Jun 24 i+* Re: "undefined behavior"?6Keith Thompson
13 Jun 24 ii+* Re: "undefined behavior"?2David Brown
14 Jun 24 iii`- Re: "undefined behavior"?1Keith Thompson
19 Jun 24 ii`* Re: "undefined behavior"?3Tim Rentsch
19 Jun 24 ii `* Re: "undefined behavior"?2Keith Thompson
22 Jun 24 ii  `- Re: "undefined behavior"?1Tim Rentsch
13 Jun 24 i`* Re: "undefined behavior"?8DFS
13 Jun 24 i +* Re: "undefined behavior"?4Ike Naar
13 Jun 24 i i`* Re: "undefined behavior"?3DFS
13 Jun 24 i i `* Re: "undefined behavior"?2Lew Pitcher
13 Jun 24 i i  `- Re: "undefined behavior"?1DFS
13 Jun 24 i `* Re: "undefined behavior"?3David Brown
14 Jun 24 i  `* Re: "undefined behavior"?2Keith Thompson
14 Jun 24 i   `- Re: "undefined behavior"?1David Brown
12 Jun 24 +* Re: "undefined behavior"?19Janis Papanagnou
13 Jun 24 i`* Re: "undefined behavior"?18Keith Thompson
13 Jun 24 i +* Re: "undefined behavior"?2Janis Papanagnou
13 Jun 24 i i`- Re: "undefined behavior"?1David Brown
13 Jun 24 i `* Re: "undefined behavior"?15David Brown
13 Jun 24 i  `* Re: "undefined behavior"?14DFS
14 Jun 24 i   `* Re: "undefined behavior"?13David Brown
15 Jun 24 i    +* Re: "undefined behavior"?11DFS
15 Jun 24 i    i`* Re: "undefined behavior"?10Keith Thompson
15 Jun 24 i    i `* Re: "undefined behavior"?9DFS
15 Jun 24 i    i  `* Re: "undefined behavior"?8Keith Thompson
15 Jun 24 i    i   `* Re: "undefined behavior"?7DFS
15 Jun 24 i    i    +* Re: "undefined behavior"?2Janis Papanagnou
15 Jun 24 i    i    i`- Re: "undefined behavior"?1DFS
15 Jun 24 i    i    +- Re: "undefined behavior"?1James Kuyper
15 Jun 24 i    i    +- Re: "undefined behavior"?1Keith Thompson
15 Jun 24 i    i    +- Re: "undefined behavior"?1bart
15 Jun 24 i    i    `- Re: "undefined behavior"?1David Brown
15 Jun 24 i    `- Re: "undefined behavior"?1David Brown
12 Jun 24 +- Re: "undefined behavior"?1Keith Thompson
13 Jun 24 +- Re: "undefined behavior"?1bart
13 Jun 24 `- Re: "undefined behavior"?1Bonita Montero

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