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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /gcc/testsuite/gfortran.dg/pr41212.f90
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Diffstat (limited to 'gcc/testsuite/gfortran.dg/pr41212.f90')
-rw-r--r--gcc/testsuite/gfortran.dg/pr41212.f9034
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diff --git a/gcc/testsuite/gfortran.dg/pr41212.f90 b/gcc/testsuite/gfortran.dg/pr41212.f90
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+! { dg-do run }
+! { dg-options "-O2" }
+program m
+ double precision :: y,z
+ call b(1.0d0,y,z)
+ if (ABS (z - 1.213) > 0.1) call abort
+contains
+ subroutine b( x, y, z)
+ implicit none
+ double precision :: x,y,z
+ integer :: i, k
+ double precision :: h, r
+
+ y = 1.0d0
+ z = 0.0d0
+
+ h = 0
+ DO k = 1,10
+ h = h + 1.0d0/k
+
+ r = 1
+ DO i = 1,k
+ r = (x/(2*i) ) * r
+ END DO
+
+ y = y + (-1)**k * r
+ z = z + (-1)**(k+1) * h * r
+
+ IF ( ABS(2*k/x*r) < 1d-6 ) EXIT
+ END DO
+
+ z = 2*y
+ end subroutine b
+end program m