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! { dg-do run }

! { dg-options "-ffrontend-optimize -fdump-tree-original" }

! PR 50564 - this used to ICE with front end optimization.

! Original test case by Andrew Benson.

program test

  implicit none

  double precision, dimension(2) :: timeSteps, control

  integer                        :: iTime

  double precision               :: ratio

  double precision               :: a

  ratio = 0.7d0

  control(1) = ratio**(dble(1)-0.5d0)-ratio**(dble(1)-1.5d0)

  control(2) = ratio**(dble(2)-0.5d0)-ratio**(dble(2)-1.5d0)

  forall(iTime=1:2)

     timeSteps(iTime)=ratio**(dble(iTime)-0.5d0)-ratio**(dble(iTime)-1.5d0)

  end forall

  if (any(abs(timesteps - control) > 1d-10)) call abort

  ! Make sure we still do the front-end optimization after a forall

  a = cos(ratio)*cos(ratio) + sin(ratio)*sin(ratio)

  if (abs(a-1.d0) > 1d-10) call abort

end program test

! { dg-final { scan-tree-dump-times "__builtin_cos" 1 "original" } }

! { dg-final { scan-tree-dump-times "__builtin_sin" 1 "original" } }

! { dg-final { cleanup-tree-dump "original" } }