87e2521022
Follow up up of https://github.com/llvm/llvm-project/pull/67693 - Zero initialize uninitialized components of saved derived type entity with a default initial value. - Zero initialize uninitialized storage of common blocks with a member with an initial value. - Zero initialized uninitialized saved equivalence This removes all the cases where fir.global are created with an initial value that results in an undef in LLVM for part of the global, leading in surprising LLVM optimizations at -O2 for Fortran folks that expects there saved variables to be zero initialized if there is no explicit or default initial value.
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.zero_bits 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.zero_bits 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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