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Re: Efficiency of different ways representing temporary arrays for derived types

From: Thomas Koenig <tkoenig at netcologne dot de>
To: Harald Anlauf <anlauf at gmx dot de>
Cc: fortran at gcc dot gnu dot org
Date: Thu, 31 Jan 2013 22:08:53 +0100
Subject: Re: Efficiency of different ways representing temporary arrays for derived types
References: <51083C08.6000701@gmx.de>

Hi Harald,

It appears that the second case, where the temporary is created
"on the fly", does more work than necessary, i.e. apparently twice
as much as in the first case.  Should I expect this?


Gfortran usually generates a temporary array whenever an array
constructor is used.  When trunk reopens, I will take a stab at
solving some of these issues.  By the way, part of this is tracked
in http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55839 .

Thomas

References:
- Efficiency of different ways representing temporary arrays for derived types
  - From: Harald Anlauf

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