1! { dg-do run } 2! { dg-options "-O2 -fdump-tree-original" } 3 4module foo 5contains 6 subroutine bar(a) 7 real, dimension(:,:) :: a 8 a(1,:) = 0. 9 end subroutine bar 10end module foo 11 12program test 13 use foo 14 implicit none 15 real, dimension (2,2) :: a, d, e 16 real, dimension (1,2) :: b 17 real, dimension (2) :: c 18 data a, d, e /12*1.0/ 19 data b /2*1.0/ 20 data c /2*1.0/ 21 22 a(1,:) = 0. ! This can't be optimized to a memset. 23 b(1,:) = 0. ! This is optimized to = {}. 24 c = 0. ! This is optimized to = {}. 25 d(:,1) = 0. ! This can't be otimized to a memset. 26 call bar(e) 27 28 if (any(a /= reshape((/ 0.0, 1.0, 0.0, 1.0/), shape(a)))) call abort 29 if (any(b /= 0.)) call abort 30 if (any(c /= 0.)) call abort 31 if (any(d /= reshape((/ 0.0, 0.0, 1.0, 1.0/), shape(d)))) call abort 32 if (any(e /= reshape((/ 0.0, 1.0, 0.0, 1.0/), shape(e)))) call abort 33 34end program 35 36! { dg-final { scan-tree-dump-times "= {}" 2 "original" } } 37! { dg-final { cleanup-tree-dump "original" } } 38