Thread overview
[Bug 180] DMD -O is faster than GDC -O3 for byte and short math
Apr 20, 2015
Ketmar Dark
Apr 20, 2015
Ketmar Dark
Aug 19, 2015
Iain Buclaw
April 20, 2015
http://bugzilla.gdcproject.org/show_bug.cgi?id=180

Ketmar Dark <ketmar@ketmar.no-ip.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ketmar@ketmar.no-ip.org
           Severity|normal                      |enhancement

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April 20, 2015
http://bugzilla.gdcproject.org/show_bug.cgi?id=180

Ketmar Dark <ketmar@ketmar.no-ip.org> changed:

           What    |Removed                     |Added
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  Attachment #84 is|0                           |1
           obsolete|                            |

--- Comment #1 from Ketmar Dark <ketmar@ketmar.no-ip.org> ---
Created attachment 85
  --> http://bugzilla.gdcproject.org/attachment.cgi?id=85&action=edit
fixed testcase

sorry, previous attachement was uncompilable. added fixed one.

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August 19, 2015
http://bugzilla.gdcproject.org/show_bug.cgi?id=180

--- Comment #2 from Iain Buclaw <ibuclaw@gdcproject.org> ---
Just idly testing this and cannot reproduce with current gdc development, or at least on the desktop I'm running.  Will have to re-check against another machine to be sure.

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November 08
https://bugzilla.gdcproject.org/show_bug.cgi?id=180

Iain Buclaw <ibuclaw@gdcproject.org> changed:

           What    |Removed                     |Added
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         Resolution|---                         |WONTFIX
             Status|NEW                         |RESOLVED

--- Comment #4 from Iain Buclaw <ibuclaw@gdcproject.org> ---
And on my test machine, I get faster results if I remove `-march=native` from the commandline.

I can only conclude that this test is contrived - and certainly looking at the generated trees, there's nothing we're really doing wrong here.  This is testing GCC's ability to produce good code, not GDC's ability.

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