xref: /llvm-project/flang/test/Lower/nullify-polymorphic.f90 (revision 12ba74e181bd6641b532e271f3bfabf53066b1c0) 
1! RUN: bbc -emit-hlfir %s -o - | FileCheck %s
2
3module 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
17contains
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
37end module
38
39program test
40  use poly
41  call test_nullify()
42end
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) -> ()
54