1! { dg-do compile } 2! PR32489 Endless loop when compiling. 3! Derived from fft257.f90, Public domain 2004 James Van Buskirk. 4! Note: The problem solved here was not an infinite loop issue. Middle-end 5! could not handle the array constructor unfolded by the front end. 6! WARNING: Potential resource hog. 7! Jerry DeLisle <jvdelisle@gcc.gnu.org> 8program test 9 implicit none 10 integer, parameter :: dp = selected_real_kind(15,300) 11 integer, parameter :: N = 257 12 complex(dp) h1(0:N-1) 13 complex(dp) h2(0:N-1) 14 complex(dp) hh(0:N-1) 15 complex(dp), parameter :: ri(2) = (/(1,0),(0,1)/) 16 integer i, j, k, L 17 real(dp) pi 18 19 pi = 4*atan(1.0_dp) 20 do i = 0, N-1 21 do j = 1, 2 22 h2 = 0 23 h2(i) = ri(j) 24 h1 = (/(sum((/(exp(-2*pi*(0,1)*mod(k*L,N)/N)*h2(L),L=0,N-1)/)),k=0,N-1)/) 25 end do 26 end do 27end program test 28