llvm/flang/test/Lower/array-copy.f90

! Test array-value-copy
  
! RUN: bbc -hlfir=false %s -o - | FileCheck %s

! Copy not needed
! CHECK-LABEL: func @_QPtest1(
! CHECK:       ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK-NOT:   ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK-NOT:     fir.freemem %
! CHECK:         return
! CHECK:       }
subroutine test1(a)
  integer :: a(3)

  a = a + 1
end subroutine test1

! Copy not needed
! CHECK-LABEL: func @_QPtest2(
! CHECK:       ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK-NOT:   ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK-NOT:     fir.freemem %
! CHECK:         return
! CHECK:       }
subroutine test2(a, b)
  integer :: a(3), b(3)

  a = b + 1
end subroutine test2

! Copy not needed
! CHECK-LABEL: func @_QPtest3(
! CHECK:       ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK-NOT:   ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK-NOT:     fir.freemem %
! CHECK:         return
! CHECK:       }
subroutine test3(a)
  integer :: a(3)

  forall (i=1:3)
     a(i) = a(i) + 1
  end forall
end subroutine test3

! Make a copy. (Crossing dependence)
! CHECK-LABEL: func @_QPtest4(
! CHECK:       ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK:       ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK:         fir.freemem %{{.*}} : !fir.heap<!fir.array<3xi32>>
! CHECK:         return
! CHECK:       }
subroutine test4(a)
  integer :: a(3)

  forall (i=1:3)
     a(i) = a(4-i) + 1
  end forall
end subroutine test4

! Make a copy. (Carried dependence)
! CHECK-LABEL: func @_QPtest5(
! CHECK:       ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK:       ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK:         fir.freemem %{{.*}} : !fir.heap<!fir.array<3xi32>>
! CHECK:         return
! CHECK:       }
subroutine test5(a)
  integer :: a(3)

  forall (i=2:3)
     a(i) = a(i-1) + 14
  end forall
end subroutine test5

! Make a copy. (Carried dependence)
! CHECK-LABEL: func @_QPtest6(
! CHECK:       ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK:       ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK:         fir.freemem %{{.*}} : !fir.heap<!fir.array<3x!fir.type<_QFtest6Tt{m:!fir.array<3xi32>}>>>
! CHECK:         return
! CHECK:       }
subroutine test6(a)
  type t
     integer :: m(3)
  end type t
  type(t) :: a(3)

  forall (i=2:3)
     a(i)%m = a(i-1)%m + 14
  end forall
end subroutine test6

! Make a copy. (Overlapping partial CHARACTER update.)
! CHECK-LABEL: func @_QPtest7(
! CHECK:       ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK:       ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK:       ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK:       ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK:         fir.freemem %{{.*}} : !fir.heap<!fir.array<3x!fir.char<1,8>>>
! CHECK:         return
! CHECK:       }
subroutine test7(a)
  character(8) :: a(3)

  a(:)(2:5) = a(:)(3:6)
end subroutine test7

! Do not make a copy.
! CHECK-LABEL: func @_QPtest8(
! CHECK:       ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK:       ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK:       ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK-NOT:   ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK-NOT:     fir.freemem %
! CHECK:         return
! CHECK:       }
subroutine test8(a,b)
  character(8) :: a(3), b(3)

  a(:)(2:5) = b(:)(3:6)
end subroutine test8

! Do make a copy. Assume vector subscripts cause dependences.
! CHECK-LABEL: func @_QPtest9(
! CHECK-SAME: %[[a:[^:]+]]: !fir.ref<!fir.array<?x?xf32>>
! CHECK: %[[und:.*]] = fir.undefined index
! CHECK: %[[slice:.*]] = fir.slice %[[und]], %[[und]], %[[und]],
! CHECK: %[[heap:.*]] = fir.allocmem !fir.array<?x?xf32>, %{{.*}}, %{{.*}}
! CHECK: ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK:   ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK: ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK:   ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK: = fir.array_coor %[[a]](%{{.*}}) [%[[slice]]] %{{.*}}, %{{.*}} : (!fir.ref<!fir.array<?x?xf32>>, !fir.shape<2>, !fir.slice<2>, index, index) -> !fir.ref<f32>
! CHECK: = fir.array_coor %[[heap]](%{{.*}}) [%[[slice]]] %{{.*}}, %{{.*}} : (!fir.heap<!fir.array<?x?xf32>>, !fir.shape<2>, !fir.slice<2>, index, index) -> !fir.ref<f32>
! CHECK: ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK:   ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK-NOT: ^bb{{[0-9]+}}(%{{.*}}: index, %{{.*}}: index):
! CHECK: fir.freemem %[[heap]]
subroutine test9(a,v1,v2,n)
  real :: a(n,n)
  integer :: v1(n), v2(n)
  a(v1,:) = a(v2,:)
end subroutine test9