Efficiency of different ways representing temporary arrays for derived types

[Thomas Koenig]

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