flang/test/Lower/nullify-polymorphic.f90

   1 ! RUN: bbc -emit-hlfir %s -o - | FileCheck %s
   2
   3 module poly
   4   type p1
   5     integer :: a
   6     integer :: b
   7   contains
   8     procedure, nopass :: proc1 => proc1_p1
   9   end type
  10
  11   type, extends(p1) :: p2
  12     integer :: c
  13   contains
  14     procedure, nopass :: proc1 => proc1_p2
  15   end type
  16
  17 contains
  18
  19   subroutine proc1_p1()
  20     print*, 'call proc1_p1'
  21   end subroutine
  22
  23   subroutine proc1_p2()
  24     print*, 'call proc1_p2'
  25   end subroutine
  26
  27   subroutine test_nullify()
  28     class(p1), pointer :: c
  29
  30     allocate(p2::c)
  31     call c%proc1()
  32
  33     nullify(c) ! c dynamic type must be reset to p1
  34
  35     call c%proc1()
  36   end subroutine
  37 end module
  38
  39 program test
  40   use poly
  41   call test_nullify()
  42 end
  43
  44 ! CHECK-LABEL: func.func @_QMpolyPtest_nullify()
  45 ! CHECK: %[[C_DESC:.*]] = fir.alloca !fir.class<!fir.ptr<!fir.type<_QMpolyTp1{a:i32,b:i32}>>> {bindc_name = "c", uniq_name = "_QMpolyFtest_nullifyEc"}
  46 ! CHECK: %[[C_DESC_DECL:.*]]:2 = hlfir.declare %[[C_DESC]] {fortran_attrs = #fir.var_attrs<pointer>, uniq_name = "_QMpolyFtest_nullifyEc"} : (!fir.ref<!fir.class<!fir.ptr<!fir.type<_QMpolyTp1{a:i32,b:i32}>>>>) -> (!fir.ref<!fir.class<!fir.ptr<!fir.type<_QMpolyTp1{a:i32,b:i32}>>>>, !fir.ref<!fir.class<!fir.ptr<!fir.type<_QMpolyTp1{a:i32,b:i32}>>>>)
  47 ! CHECK: %{{.*}} = fir.call @_FortranAPointerAllocate(%{{.*}}, %{{.*}}, %{{.*}}, %{{.*}}, %{{.*}}) {{.*}}: (!fir.ref<!fir.box<none>>, i1, !fir.box<none>, !fir.ref<i8>, i32) -> i32
  48 ! CHECK: %[[DECLARED_TYPE_DESC:.*]] = fir.type_desc !fir.type<_QMpolyTp1{a:i32,b:i32}>
  49 ! CHECK: %[[C_DESC_CAST:.*]] = fir.convert %[[C_DESC_DECL]]#1 : (!fir.ref<!fir.class<!fir.ptr<!fir.type<_QMpolyTp1{a:i32,b:i32}>>>>) -> !fir.ref<!fir.box<none>>
  50 ! CHECK: %[[TYPE_DESC_CAST:.*]] = fir.convert %[[DECLARED_TYPE_DESC]] : (!fir.tdesc<!fir.type<_QMpolyTp1{a:i32,b:i32}>>) -> !fir.ref<none>
  51 ! CHECK: %[[RANK:.*]] = arith.constant 0 : i32
  52 ! CHECK: %[[CORANK:.*]] = arith.constant 0 : i32
  53 ! CHECK: %{{.*}} = fir.call @_FortranAPointerNullifyDerived(%[[C_DESC_CAST]], %[[TYPE_DESC_CAST]], %[[RANK]], %[[CORANK]]) {{.*}}: (!fir.ref<!fir.box<none>>, !fir.ref<none>, i32, i32) -> none