b9031d3279
Follow up of https://reviews.llvm.org/D149979 for lowering. In Fortran, it is possible to assign a pointer to another pointer with an undefined association status. When using the runtime do to none trivial pointer association, if the descriptor are garbage, the runtime cannot safely detect that it has a garbage descriptor, and it cannot safely know the descriptor size leading to undefined behavior. Another reason to initialize descriptor of pointers is to record any non deferred length parameter value. Hence, although this is not required by Fortran, f18 always initialize pointers to NULL(). This was already done in lowering for whole pointer object, but not for pointer components. This patch uses the related semantics patch that updated derivedTypeSpe::HasDefaultInitialization to ensure pointer components of local and global object are always initialized. It adds tests to ensure that allocation of such derived type uses the runtime to ensure the storage is initialized, and that structure constructors are setting the descriptor component to NULL() if no initial target is given. Differential Revision: https://reviews.llvm.org/D150180
117 lines
5.1 KiB
Fortran
117 lines
5.1 KiB
Fortran
! Test that pointer and pointer components are always initialized to a
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! clean NULL() status. This is required by f18 runtime to do pointer
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! association with a RHS with an undefined association status from a
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! Fortran point of view.
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! RUN: bbc -emit-fir -I nw %s -o - | FileCheck %s
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module test
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type t
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integer :: i
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real, pointer :: x(:)
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end type
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real, pointer :: test_module_pointer(:)
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! CHECK-LABEL: fir.global @_QMtestEtest_module_pointer : !fir.box<!fir.ptr<!fir.array<?xf32>>> {
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! CHECK: %[[VAL_0:.*]] = fir.zero_bits !fir.ptr<!fir.array<?xf32>>
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! CHECK: %[[VAL_1:.*]] = arith.constant 0 : index
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! CHECK: %[[VAL_2:.*]] = fir.shape %[[VAL_1]] : (index) -> !fir.shape<1>
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! CHECK: %[[VAL_3:.*]] = fir.embox %[[VAL_0]](%[[VAL_2]]) : (!fir.ptr<!fir.array<?xf32>>, !fir.shape<1>) -> !fir.box<!fir.ptr<!fir.array<?xf32>>>
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! CHECK: fir.has_value %[[VAL_3]] : !fir.box<!fir.ptr<!fir.array<?xf32>>>
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type(t) :: test_module_var
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! CHECK-LABEL: fir.global @_QMtestEtest_module_var : !fir.type<_QMtestTt{i:i32,x:!fir.box<!fir.ptr<!fir.array<?xf32>>>}> {
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! CHECK: %[[VAL_0:.*]] = fir.undefined !fir.type<_QMtestTt{i:i32,x:!fir.box<!fir.ptr<!fir.array<?xf32>>>}>
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! CHECK: %[[VAL_1:.*]] = fir.undefined i32
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! CHECK: %[[VAL_2:.*]] = fir.field_index i
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! CHECK: %[[VAL_3:.*]] = fir.insert_value %[[VAL_0]], %[[VAL_1]]
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! CHECK: %[[VAL_4:.*]] = fir.zero_bits !fir.ptr<!fir.array<?xf32>>
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! CHECK: %[[VAL_5:.*]] = arith.constant 0 : index
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! CHECK: %[[VAL_6:.*]] = fir.shape %[[VAL_5]] : (index) -> !fir.shape<1>
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! CHECK: %[[VAL_7:.*]] = fir.embox %[[VAL_4]](%[[VAL_6]]) : (!fir.ptr<!fir.array<?xf32>>, !fir.shape<1>) -> !fir.box<!fir.ptr<!fir.array<?xf32>>>
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! CHECK: %[[VAL_8:.*]] = fir.field_index x
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! CHECK: %[[VAL_9:.*]] = fir.insert_value %[[VAL_3]], %[[VAL_7]]
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! CHECK: fir.has_value %[[VAL_9]]
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end module
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subroutine test_local()
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use test, only : t
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type(t) :: x
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end subroutine
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! CHECK-LABEL: func.func @_QPtest_local() {
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! CHECK: fir.call @_FortranAInitialize(
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subroutine test_saved()
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use test, only : t
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type(t), save :: x
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end subroutine
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! See check for fir.global internal @_QFtest_savedEx below.
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subroutine test_alloc(x)
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use test, only : t
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type(t), allocatable :: x
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allocate(x)
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end subroutine
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! CHECK-LABEL: func.func @_QPtest_alloc(
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! CHECK: fir.call @_FortranAAllocatableAllocate
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subroutine test_intentout(x)
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use test, only : t
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type(t), intent(out):: x
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end subroutine
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! CHECK-LABEL: func.func @_QPtest_intentout(
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! CHECK-NOT: fir.call @_FortranAInitialize(
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! CHECK: return
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subroutine test_struct_ctor_cst(x)
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use test, only : t
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type(t):: x
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x = t(42)
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end subroutine
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! CHECK-LABEL: func.func @_QPtest_struct_ctor_cst(
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! CHECK: fir.call @_FortranAInitialize(
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subroutine test_struct_ctor_dyn(x, i)
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use test, only : t
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type(t):: x
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integer :: i
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x = t(i)
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end subroutine
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! CHECK-LABEL: func.func @_QPtest_struct_ctor_dyn(
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! CHECK: fir.call @_FortranAInitialize(
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subroutine test_local_pointer()
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real, pointer :: x(:)
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end subroutine
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! CHECK-LABEL: func.func @_QPtest_local_pointer() {
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! CHECK: %[[VAL_0:.*]] = fir.alloca !fir.box<!fir.ptr<!fir.array<?xf32>>> {bindc_name = "x", uniq_name = "_QFtest_local_pointerEx"}
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! CHECK: %[[VAL_1:.*]] = fir.zero_bits !fir.ptr<!fir.array<?xf32>>
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! CHECK: %[[VAL_2:.*]] = arith.constant 0 : index
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! CHECK: %[[VAL_3:.*]] = fir.shape %[[VAL_2]] : (index) -> !fir.shape<1>
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! CHECK: %[[VAL_4:.*]] = fir.embox %[[VAL_1]](%[[VAL_3]]) : (!fir.ptr<!fir.array<?xf32>>, !fir.shape<1>) -> !fir.box<!fir.ptr<!fir.array<?xf32>>>
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! CHECK: fir.store %[[VAL_4]] to %[[VAL_0]] : !fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>
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subroutine test_saved_pointer()
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real, pointer, save :: x(:)
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end subroutine
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! See check for fir.global internal @_QFtest_saved_pointerEx below.
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! CHECK-LABEL: fir.global internal @_QFtest_savedEx : !fir.type<_QMtestTt{i:i32,x:!fir.box<!fir.ptr<!fir.array<?xf32>>>}> {
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! CHECK: %[[VAL_0:.*]] = fir.undefined !fir.type<_QMtestTt{i:i32,x:!fir.box<!fir.ptr<!fir.array<?xf32>>>}>
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! CHECK: %[[VAL_1:.*]] = fir.undefined i32
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! CHECK: %[[VAL_2:.*]] = fir.field_index i
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! CHECK: %[[VAL_3:.*]] = fir.insert_value %[[VAL_0]], %[[VAL_1]]
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! CHECK: %[[VAL_4:.*]] = fir.zero_bits !fir.ptr<!fir.array<?xf32>>
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! CHECK: %[[VAL_5:.*]] = arith.constant 0 : index
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! CHECK: %[[VAL_6:.*]] = fir.shape %[[VAL_5]] : (index) -> !fir.shape<1>
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! CHECK: %[[VAL_7:.*]] = fir.embox %[[VAL_4]](%[[VAL_6]]) : (!fir.ptr<!fir.array<?xf32>>, !fir.shape<1>) -> !fir.box<!fir.ptr<!fir.array<?xf32>>>
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! CHECK: %[[VAL_8:.*]] = fir.field_index x
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! CHECK: %[[VAL_9:.*]] = fir.insert_value %[[VAL_3]], %[[VAL_7]]
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! CHECK: fir.has_value %[[VAL_9]]
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! CHECK-LABEL: fir.global internal @_QFtest_saved_pointerEx : !fir.box<!fir.ptr<!fir.array<?xf32>>> {
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! CHECK: %[[VAL_0:.*]] = fir.zero_bits !fir.ptr<!fir.array<?xf32>>
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! CHECK: %[[VAL_1:.*]] = arith.constant 0 : index
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! CHECK: %[[VAL_2:.*]] = fir.shape %[[VAL_1]] : (index) -> !fir.shape<1>
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! CHECK: %[[VAL_3:.*]] = fir.embox %[[VAL_0]](%[[VAL_2]]) : (!fir.ptr<!fir.array<?xf32>>, !fir.shape<1>) -> !fir.box<!fir.ptr<!fir.array<?xf32>>>
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! CHECK: fir.has_value %[[VAL_3]] : !fir.box<!fir.ptr<!fir.array<?xf32>>>
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