[Bug fortran/66182] Unneeded temporary for elemental functions of function results

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66182

Dominique d'Humieres <dominiq at lps dot ens.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-08-30
     Ever confirmed|0                           |1

--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Note that matmul does not seem inlined for the test in comment 0: I see

call    __gfortran_matmul_c4

in the assembly.

> This should be replaced by
>
>   c = matmul(a,b)
>   c = conjg(c)

For large matrices it would be even better to do

c(i,j) = conjg(c(i,j))

after c(i,j) has been computed.