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re PR tree-optimization/80304 (Wrong result with do concurrent) 

2017-04-10  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR tree-optimization/80304
	* gfortran.dg/do_concurrent_4.f90:  New test case.

From-SVN: r246824
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Thomas Koenig 2017-04-10 20:40:48 +00:00
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gcc/testsuite/ChangeLog
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2017-04-10 Thomas Koenig <tkoenig@gcc.gnu.org>
PR tree-optimization/80304
* gfortran.dg/do_concurrent_4.f90: New test case.
2017-04-10 Janus Weil <janus@gcc.gnu.org>
PR fortran/80046

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gcc/testsuite/gfortran.dg/do_concurrent_4.f90 Normal file
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! { dg-do run }
! { dg-options "-O" }
! PR 80304 - this used to give a wrong result.
! Original test case by Chinoune
module test_mod
implicit none
contains
pure real function add(i,j,k)
integer ,intent(in) :: i,j,k
add = real(i+j+k)+1.
end function add
pure real function add2(i,j,k)
integer ,intent(in) :: i,j,k
add2 = real(i+j+k)
end function add2
subroutine check_err(a, s)
real, dimension(:,:), intent(in) :: a
real, intent(in) :: s
if (abs(sum(a) - s) > 1e-5) call abort
end subroutine check_err
end module test_mod
program test
use test_mod
implicit none
integer :: i ,j
real :: a(0:1,0:1) ,b(0:1,0:1)
! first do-concurrent loop
a = 0.
b = 0.
DO CONCURRENT( i=0:1 ,j=0:1)
a(i,j) = add(i,j,abs(i-j))
b(i,j) = add2(i,j,abs(i-j))
END DO
call check_err (a, 10.)
call check_err (b, 6.)
! normal do loop
a = 0.
b = 0.
DO i=0,1
DO j=0,1
a(i,j) = add(i,j,abs(i-j))
b(i,j) = add2(i,j,abs(i-j))
END DO
END DO
call check_err (a, 10.)
call check_err (b, 6.)
! second do-concuurent loop
a = 0.
b = 0.
DO CONCURRENT( i=0:1 ,j=0:1)
a(i,j) = add(i,j,abs(i-j))
b(i,j) = add2(i,j,abs(i-j))
END DO
call check_err (a, 10.)
call check_err (b, 6.)
end program test