[Bug fortran/52473] CSHIFT slow - inline it?

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52473

--- Comment #16 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
For the original test compiled with -Ofast, I get

 Testing explicit DO loops
 Dim =            1  Elapsed CPU time =   0.846953988    
 Dim =            2  Elapsed CPU time =   0.724469006    
 Dim =            3  Elapsed CPU time =   0.680019855    
 Testing built-in cshift
 Dim =            1  Elapsed CPU time =   0.506424904    
 Dim =            2  Elapsed CPU time =   0.391590118    
 Dim =            3  Elapsed CPU time =   0.352367163    

An for the IDRIS test:

=====================
 Call to test_eoshift
=====================

 Order of matrix:        1000
 test_eoshift> 1) EOSHIFT
                                       Used CPU time ==>         2.976 ms
 test__eoshift> 2) DO loop
                                       Used CPU time ==>         0.832 ms
 Results OK

====================
 Call to test_cshift
====================

 Order of matrix:        1000
 test_cshift> 1) CSHIFT
                                       Used CPU time ==>         1.377 ms
 test__cshift> 2) DO loop
                                       Used CPU time ==>         1.051 ms
 Results OK

=====================
 Call to test_reshape
=====================

 Order of matrix:        1000
 test__reshape> 1) RESHAPE
                                       Used CPU time ==>         4.909 ms
 test__reshape> 2) DO loop
                                       Used CPU time ==>         0.877 ms
 Results OK

May be this PR could be closed.