[Bug fortran/98577] Wrong "count_rate" values with int32 and real32 if the "count" argument is int64.

[kargl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98577

kargl at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|WONTFIX                     |INVALID

--- Comment #14 from kargl at gcc dot gnu.org ---
(In reply to Chinoune from comment #12)
> First example:
> 
> $ ifort bug_gcc_tic.f90 -o test.x
> $ ./test.x
> count(int_32):                                                              
> count_rate(int32) =        10000                                            
> count_rate(int64) =                  10000                                  
> count_rate(real32) =    10000.00                                            
> count_rate(real64) =    10000.0000000000                                    
> count(int_64):                                                              
> count_rate(int32) =      1000000                                            
> count_rate(int64) =                1000000                                  
> count_rate(real32) =    1000000.                                            
> count_rate(real64) =    1000000.00000000
> 
> Unlike gfortran, count_rate with ifort depends only on the precision of the
> first argument of system_clock. It doesn't mixup.

That is not required by the Fortran Standard, but conforms because
COUNT and COUNT_RATE are processor-dependent.

I also took the opportunity to look at the Intel Fortran documentation at

https://software.intel.com/content/www/us/en/develop/documentation/fortran-compiler-oneapi-dev-guide-and-reference/top/language-reference/a-to-z-reference/s-1/system-clock.html

dated 4 dec 2020.  Note, the following hightlighted sentence on
that page:

   "All integer arguments used must have the same integer kind parameter."

That is not required by Fortran Standard.  Why would Intel require
compatible kind type parameters?  Your program in comment #0 does
meet the requirements placed on system_clock() by Intel.