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Wrong result with /64 /opt, module variable used as DO index

 
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mecej4



Joined: 31 Oct 2006
Posts: 1886
PostPosted: Thu Feb 22, 2024 8:57 pm    Post subject: Wrong result with /64 /opt, module variable used as DO index Reply with quote
When the following program is built with /64 /opt and run, the result is wrong -- a zero is printed instead of 34^2 = 1156.

Code:
module imod_m
   implicit none
   integer idir
end module

program tst
   use imod_m
   implicit none
   integer j, k
   do idir=1,10     ! Module variable used as DO index variable
      j = idir*3+4
      k = j*j
   end do
   print *,k
end program
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PaulLaidler
Site Admin


Joined: 21 Feb 2005
Posts: 7927
Location: Salford, UK
PostPosted: Fri Feb 23, 2024 8:36 am    Post subject: Reply with quote
mecej4

Many thanks for the feedback. The failure relates to optimisation number 30. I have made a note of this.
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PaulLaidler
Site Admin


Joined: 21 Feb 2005
Posts: 7927
Location: Salford, UK
PostPosted: Fri Feb 23, 2024 11:06 am    Post subject: Reply with quote
This failure has now been fixed for the next release of FTN95.
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