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! { dg-do compile }
! { dg-options "-Warray-temporaries -O -fdump-tree-original" }
!
! PR fortran/43829
! Scalarization of reductions.
! Test that sum is properly inlined.
! This is the compile time test only; for the runtime test see inline_sum_2.f90
! We can't test for temporaries on the run time test directly, as it tries
! several optimization options among which -Os, and sum inlining is disabled
! at -Os.
implicit none
integer :: i, j, k
integer, parameter :: q = 2
integer, parameter :: nx=3, ny=2*q, nz=5
integer, parameter, dimension(nx,ny,nz) :: p = &
& reshape ((/ (i**2, i=1,size(p)) /), shape(p))
integer, parameter, dimension( ny,nz) :: px = &
& reshape ((/ (( &
& nx*( nx*j+nx*ny*k+1)*( nx*j+nx*ny*k+1+ (nx-1)) &
& + nx*(nx-1)*(2*nx-1)/6, &
& j=0,ny-1), k=0,nz-1) /), shape(px))
integer, parameter, dimension(nx, nz) :: py = &
& reshape ((/ (( &
& ny*(i +nx*ny*k+1)*(i +nx*ny*k+1+nx *(ny-1)) &
& +(nx )**2*ny*(ny-1)*(2*ny-1)/6, &
& i=0,nx-1), k=0,nz-1) /), shape(py))
integer, parameter, dimension(nx,ny ) :: pz = &
& reshape ((/ (( &
& nz*(i+nx*j +1)*(i+nx*j +1+nx*ny*(nz-1)) &
& +(nx*ny)**2*nz*(nz-1)*(2*nz-1)/6, &
& i=0,nx-1), j=0,ny-1) /), shape(pz))
integer, dimension(nx,ny,nz) :: a
integer, dimension( ny,nz) :: ax
integer, dimension(nx, nz) :: ay
integer, dimension(nx,ny ) :: az
logical, dimension(nx,ny,nz) :: m, true
integer, dimension(nx,ny) :: b
integer, dimension(nx,nx) :: onesx
integer, dimension(ny,ny) :: onesy
integer, dimension(nz,nz) :: onesz
a = p
m = reshape((/ ((/ .true., .false. /), i=1,size(m)/2) /), shape(m))
true = reshape((/ (.true., i=1,size(true)) /), shape(true))
onesx = reshape((/ ((1, j=1,i),(0,j=1,nx-i),i=1,size(onesx,2)) /), shape(onesx))
onesy = reshape((/ ((1, j=1,i),(0,j=1,ny-i),i=1,size(onesy,2)) /), shape(onesy))
onesz = reshape((/ ((1, j=1,i),(0,j=1,nz-i),i=1,size(onesz,2)) /), shape(onesz))
! Correct results in simple cases
ax = sum(a,1)
if (any(ax /= px)) STOP 1
ay = sum(a,2)
if (any(ay /= py)) STOP 2
az = sum(a,3)
if (any(az /= pz)) STOP 3
! Masks work
if (any(sum(a,1,.false.) /= 0)) STOP 4
if (any(sum(a,2,.true.) /= py)) STOP 5
if (any(sum(a,3,m) /= merge(pz,0,m(:,:,1)))) STOP 6
if (any(sum(a,2,m) /= merge(sum(a(:, ::2,:),2),&
sum(a(:,2::2,:),2),&
m(:,1,:)))) STOP 7
! It works too with array constructors ...
if (any(sum( &
reshape((/ (i*i,i=1,size(a)) /), shape(a)), &
1, &
true) /= ax)) STOP 8
! ... and with vector subscripts
if (any(sum( &
a((/ (i,i=1,nx) /), &
(/ (i,i=1,ny) /), &
(/ (i,i=1,nz) /)), &
1) /= ax)) STOP 9
if (any(sum( &
a(sum(onesx(:,:),1), & ! unnecessary { dg-warning "Creating array temporary" }
sum(onesy(:,:),1), & ! unnecessary { dg-warning "Creating array temporary" }
sum(onesz(:,:),1)), & ! unnecessary { dg-warning "Creating array temporary" }
1) /= ax)) STOP 10
! Nested sums work
if (sum(sum(sum(a,1),1),1) /= sum(a)) STOP 11
if (sum(sum(sum(a,1),2),1) /= sum(a)) STOP 12
if (sum(sum(sum(a,3),1),1) /= sum(a)) STOP 13
if (sum(sum(sum(a,3),2),1) /= sum(a)) STOP 14
if (any(sum(sum(a,1),1) /= sum(sum(a,2),1))) STOP 15
if (any(sum(sum(a,1),2) /= sum(sum(a,3),1))) STOP 16
if (any(sum(sum(a,2),2) /= sum(sum(a,3),2))) STOP 17
! Temps are unavoidable here (function call's argument or result)
ax = sum(neid3(a),1) ! { dg-warning "Creating array temporary" }
! Sums as part of a bigger expr work
if (any(1+sum(eid(a),1)+ax+sum( &
neid3(a), & ! { dg-warning "Creating array temporary" }
1)+1 /= 3*ax+2)) STOP 18
if (any(1+eid(sum(a,2))+ay+ &
neid2( & ! { dg-warning "Creating array temporary" }
sum(a,2) & ! { dg-warning "Creating array temporary" }
)+1 /= 3*ay+2)) STOP 19
if (any(sum(eid(sum(a,3))+az+2* &
neid2(az) & ! { dg-warning "Creating array temporary" }
,1)+1 /= 4*sum(az,1)+1)) STOP 20
if (any(sum(transpose(sum(a,1)),1)+sum(az,1) /= sum(ax,2)+sum(sum(a,3),1))) STOP 21
! Creates a temp when needed.
a(1,:,:) = sum(a,1) ! unnecessary { dg-warning "Creating array temporary" }
if (any(a(1,:,:) /= ax)) STOP 22
b = p(:,:,1)
call set(b(2:,1), sum(b(:nx-1,:),2)) ! { dg-warning "Creating array temporary" }
if (any(b(2:,1) /= ay(1:nx-1,1))) STOP 23
b = p(:,:,1)
call set(b(:,1), sum(b,2)) ! unnecessary { dg-warning "Creating array temporary" }
if (any(b(:,1) /= ay(:,1))) STOP 24
b = p(:,:,1)
call tes(sum(eid(b(:nx-1,:)),2), b(2:,1)) ! { dg-warning "Creating array temporary" }
if (any(b(2:,1) /= ay(1:nx-1,1))) STOP 25
b = p(:,:,1)
call tes(eid(sum(b,2)), b(:,1)) ! unnecessary { dg-warning "Creating array temporary" }
if (any(b(:,1) /= ay(:,1))) STOP 26
contains
elemental function eid (x)
integer, intent(in) :: x
integer :: eid
eid = x
end function eid
function neid2 (x)
integer, intent(in) :: x(:,:)
integer :: neid2(size(x,1),size(x,2))
neid2 = x
end function neid2
function neid3 (x)
integer, intent(in) :: x(:,:,:)
integer :: neid3(size(x,1),size(x,2),size(x,3))
neid3 = x
end function neid3
elemental subroutine set (o, i)
integer, intent(in) :: i
integer, intent(out) :: o
o = i
end subroutine set
elemental subroutine tes (i, o)
integer, intent(in) :: i
integer, intent(out) :: o
o = i
end subroutine tes
end
! { dg-final { scan-tree-dump-times "struct array.._integer\\(kind=4\\) atmp" 13 "original" } }
! { dg-final { scan-tree-dump-times "struct array\[^\\n\]*atmp" 13 "original" } }
! { dg-final { scan-tree-dump-times "_gfortran_sum_" 0 "original" } }
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