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! { dg-do run }
! { dg-options "-O2 -fdump-tree-original" }
module foo
contains
subroutine bar(a)
real, dimension(:,:) :: a
a(1,:) = 0.
end subroutine bar
end module foo
program test
use foo
implicit none
real, dimension (2,2) :: a, d, e
real, dimension (1,2) :: b
real, dimension (2) :: c
data a, d, e /12*1.0/
data b /2*1.0/
data c /2*1.0/
a(1,:) = 0. ! This can't be optimized to a memset.
b(1,:) = 0. ! This is optimized to = {}.
c = 0. ! This is optimized to = {}.
d(:,1) = 0. ! This can't be otimized to a memset.
call bar(e)
if (any(a /= reshape((/ 0.0, 1.0, 0.0, 1.0/), shape(a)))) call abort
if (any(b /= 0.)) call abort
if (any(c /= 0.)) call abort
if (any(d /= reshape((/ 0.0, 0.0, 1.0, 1.0/), shape(d)))) call abort
if (any(e /= reshape((/ 0.0, 1.0, 0.0, 1.0/), shape(e)))) call abort
end program
! { dg-final { scan-tree-dump-times "= {}" 2 "original" } }
! { dg-final { cleanup-tree-dump "original" } }
! { dg-final { cleanup-modules "foo" } }
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