[flang] Lower struct ctor with character allocatable components #79179
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There is no need to gather the length parameters from the parameter symbols when facing a deferred length allocatable component in a structure constructor, the length is set as part of the assignment given the value.
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@llvm/pr-subscribers-flang-fir-hlfir Author: None (jeanPerier) ChangesThere is no need to gather the length parameters from the parameter symbols when facing a deferred length allocatable components in a structure constructor, the length is set as part of the assignment given the value. Remove the checks for derived type runtime info symbols, this is not relevant for what is being tested here. Full diff: https://github.com/llvm/llvm-project/pull/79179.diff 2 Files Affected:
diff --git a/flang/lib/Lower/ConvertExprToHLFIR.cpp b/flang/lib/Lower/ConvertExprToHLFIR.cpp
index a3ad10978e5986..e4e84b1d883fca 100644
--- a/flang/lib/Lower/ConvertExprToHLFIR.cpp
+++ b/flang/lib/Lower/ConvertExprToHLFIR.cpp
@@ -1383,6 +1383,14 @@ struct UnaryOp<
}
};
+static bool hasDeferredCharacterLength(const Fortran::semantics::Symbol &sym) {
+ const Fortran::semantics::DeclTypeSpec *type = sym.GetType();
+ return type &&
+ type->category() ==
+ Fortran::semantics::DeclTypeSpec::Category::Character &&
+ type->characterTypeSpec().length().isDeferred();
+}
+
/// Lower Expr to HLFIR.
class HlfirBuilder {
public:
@@ -1719,8 +1727,12 @@ class HlfirBuilder {
mlir::Type idxType = builder.getIndexType();
typeParams.push_back(
builder.createIntegerConstant(loc, idxType, charType.getLen()));
- } else {
- TODO(loc, "dynamic character length in structure constructor");
+ } else if (!hasDeferredCharacterLength(sym)) {
+ // If the length is not deferred, this is a parametrized derived type
+ // where the character length depends on the derived type length
+ // parameters. Otherwise, this is a pointer/allocatable component and
+ // the length will be set during the assignment.
+ TODO(loc, "automatic character component in structure constructor");
}
}
diff --git a/flang/test/Lower/structure-constructors-alloc-comp.f90 b/flang/test/Lower/structure-constructors-alloc-comp.f90
index f6dceb8f5e0501..5b56463303baea 100644
--- a/flang/test/Lower/structure-constructors-alloc-comp.f90
+++ b/flang/test/Lower/structure-constructors-alloc-comp.f90
@@ -3,11 +3,20 @@
module m_struct_ctor
implicit none
+
type t_alloc
real :: x
integer, allocatable :: a(:)
end type
+ type t_alloc_char
+ character(:), allocatable :: a
+ end type
+
+ type t_alloc_char_cst_len
+ character(2), allocatable :: a
+ end type
+
contains
subroutine test_alloc1(y)
real :: y
@@ -15,22 +24,6 @@ subroutine test_alloc1(y)
! HLFIR-LABEL: func.func @_QMm_struct_ctorPtest_alloc1(
! HLFIR-SAME: %[[ARG_0:.*]]: !fir.ref<f32> {fir.bindc_name = "y"}) {
! HLFIR: %[[VAL_0:.*]] = fir.alloca !fir.type<_QMm_struct_ctorTt_alloc{x:f32,a:!fir.box<!fir.heap<!fir.array<?xi32>>>}>
-! HLFIR: %[[VAL_1:.*]] = fir.address_of(@_QMm_struct_ctorE.n.x) : !fir.ref<!fir.char<1>>
-! HLFIR: %[[CONS_1:.*]] = arith.constant 1 : index
-! HLFIR: %[[VAL_2:.*]]:2 = hlfir.declare %[[VAL_1]] {{.*}}"_QMm_struct_ctorE.n.x"
-! HLFIR: %[[VAL_3:.*]] = fir.address_of(@_QMm_struct_ctorE.n.a) : !fir.ref<!fir.char<1>>
-! HLFIR: %[[CONS_2:.* ]]= arith.constant 1 : index
-! HLFIR: %[[VAL_4:.*]]:2 = hlfir.declare %[[VAL_3]] {{.*}}"_QMm_struct_ctorE.n.a"
-! HLFIR: %[[VAL_5:.*]] = fir.address_of(@_QMm_struct_ctorE.n.t_alloc) : !fir.ref<!fir.char<1,7>>
-! HLFIR: %[[CONS_3:.*]] = arith.constant 7 : index
-! HLFIR: %[[VAL_6:.*]]:2 = hlfir.declare %[[VAL_5]] {{.*}}"_QMm_struct_ctorE.n.t_alloc"
-! HLFIR: %[[VAL_7:.*]] = fir.address_of(@_QMm_struct_ctorE.c.t_alloc)
-! HLFIR: %[[CONS_4:.*]] = arith.constant 0 : index
-! HLFIR: %[[CONS_5:.*]] = arith.constant 2 : index
-! HLFIR: %[[VAL_8:.*]] = fir.shape_shift %[[CONS_4]], %[[CONS_5]] : (index, index) -> !fir.shapeshift<1>
-! HLFIR: %[[VAL_9:.*]]:2 = hlfir.declare %[[VAL_7]](%[[VAL_8]]) {{.*}}"_QMm_struct_ctorE.c.t_alloc"
-! HLFIR: %[[VAL_10:.*]] = fir.address_of(@_QMm_struct_ctorE.dt.t_alloc)
-! HLFIR: %[[VAL_11:.*]]:2 = hlfir.declare %[[VAL_10]] {{.*}}"_QMm_struct_ctorE.dt.t_alloc"
! HLFIR: %[[VAL_12:.*]]:2 = hlfir.declare %[[ARG_0]] {uniq_name = "_QMm_struct_ctorFtest_alloc1Ey"} : (!fir.ref<f32>) -> (!fir.ref<f32>, !fir.ref<f32>)
! HLFIR: %[[VAL_13:.*]]:2 = hlfir.declare %[[VAL_0]] {uniq_name = "ctor.temp"} : (!fir.ref<!fir.type<_QMm_struct_ctorTt_alloc{x:f32,a:!fir.box<!fir.heap<!fir.array<?xi32>>>}>>) -> (!fir.ref<!fir.type<_QMm_struct_ctorTt_alloc{x:f32,a:!fir.box<!fir.heap<!fir.array<?xi32>>>}>>, !fir.ref<!fir.type<_QMm_struct_ctorTt_alloc{x:f32,a:!fir.box<!fir.heap<!fir.array<?xi32>>>}>>)
! HLFIR: %[[VAL_14:.*]] = fir.embox %[[VAL_13]]#0 : (!fir.ref<!fir.type<_QMm_struct_ctorTt_alloc{x:f32,a:!fir.box<!fir.heap<!fir.array<?xi32>>>}>>) -> !fir.box<!fir.type<_QMm_struct_ctorTt_alloc{x:f32,a:!fir.box<!fir.heap<!fir.array<?xi32>>>}>>
@@ -54,22 +47,6 @@ subroutine test_alloc2(y, b)
! HLFIR-LABEL: func.func @_QMm_struct_ctorPtest_alloc2
! HLFIR-SAME: (%[[ARG_0:.*]]: !fir.ref<f32> {fir.bindc_name = "y"}, %[[ARG_1:.*]]: !fir.ref<!fir.array<5xi32>> {fir.bindc_name = "b"}) {
! HLFIR: %[[VAL_0:.*]] = fir.alloca !fir.type<_QMm_struct_ctorTt_alloc{x:f32,a:!fir.box<!fir.heap<!fir.array<?xi32>>>}>
-! HLFIR: %[[VAL_1:.*]] = fir.address_of(@_QMm_struct_ctorE.n.x) : !fir.ref<!fir.char<1>>
-! HLFIR: %[[CONS_1:.*]] = arith.constant 1 : index
-! HLFIR: %[[VAL_2:.*]]:2 = hlfir.declare %[[VAL_1]] typeparams %[[CONS_1]] {{.*}}"_QMm_struct_ctorE.n.x"
-! HLFIR: %[[VAL_3:.*]] = fir.address_of(@_QMm_struct_ctorE.n.a) : !fir.ref<!fir.char<1>>
-! HLFIR: %[[CONS_2:.*]] = arith.constant 1 : index
-! HLFIR: %[[VAL_4:.*]]:2 = hlfir.declare %[[VAL_3]] typeparams %[[CONS_2]] {{.*}}"_QMm_struct_ctorE.n.a"
-! HLFIR: %[[VAL_5:.*]] = fir.address_of(@_QMm_struct_ctorE.n.t_alloc) : !fir.ref<!fir.char<1,7>>
-! HLFIR: %[[CONS_3:.*]] = arith.constant 7 : index
-! HLFIR: %[[VAL_6:.*]]:2 = hlfir.declare %[[VAL_5]] typeparams %[[CONS_3]] {{.*}}"_QMm_struct_ctorE.n.t_alloc"
-! HLFIR: %[[VAL_7:.*]] = fir.address_of(@_QMm_struct_ctorE.c.t_alloc)
-! HLFIR: %[[CONS_4:.*]] = arith.constant 0 : index
-! HLFIR: %[[CONS_5:.*]] = arith.constant 2 : index
-! HLFIR: %[[VAL_8:.*]] = fir.shape_shift %[[CONS_4]], %[[CONS_5]] : (index, index) -> !fir.shapeshift<1>
-! HLFIR: %[[VAL_9:.*]]:2 = hlfir.declare %[[VAL_7]](%[[VAL_8]]) {{.*}}"_QMm_struct_ctorE.c.t_alloc"
-! HLFIR: %[[VAL_10:.*]] = fir.address_of(@_QMm_struct_ctorE.dt.t_alloc)
-! HLFIR: %[[VAL_11:.*]]:2 = hlfir.declare %[[VAL_10]] {{.*}}"_QMm_struct_ctorE.dt.t_alloc"
! HLFIR: %[[CONS_6:.*]] = arith.constant 5 : index
! HLFIR: %[[VAL_12:.*]] = fir.shape %[[CONS_6]] : (index) -> !fir.shape<1>
! HLFIR: %[[VAL_13:.*]]:2 = hlfir.declare %[[ARG_1]](%[[VAL_12]]) {uniq_name = "_QMm_struct_ctorFtest_alloc2Eb"} : (!fir.ref<!fir.array<5xi32>>, !fir.shape<1>) -> (!fir.ref<!fir.array<5xi32>>, !fir.ref<!fir.array<5xi32>>)
@@ -94,22 +71,6 @@ subroutine test_alloc2(y, b)
subroutine test_alloc3()
type(t_alloc) :: t1 = t_alloc(x=5, a=null())
! HLFIR-LABEL: func.func @_QMm_struct_ctorPtest_alloc3() {
-! HLFIR: %[[VAL_0:.*]] = fir.address_of(@_QMm_struct_ctorE.n.x) : !fir.ref<!fir.char<1>>
-! HLFIR: %c1 = arith.constant 1 : index
-! HLFIR: %[[VAL_1:.*]]:2 = hlfir.declare %[[VAL_0]] typeparams %c1 {{.*}}"_QMm_struct_ctorE.n.x"
-! HLFIR: %[[VAL_2:.*]] = fir.address_of(@_QMm_struct_ctorE.n.a) : !fir.ref<!fir.char<1>>
-! HLFIR: %c1_0 = arith.constant 1 : index
-! HLFIR: %[[VAL_3:.*]]:2 = hlfir.declare %[[VAL_2]] typeparams %c1_0 {{.*}}"_QMm_struct_ctorE.n.a"
-! HLFIR: %[[VAL_4:.*]] = fir.address_of(@_QMm_struct_ctorE.n.t_alloc) : !fir.ref<!fir.char<1,7>>
-! HLFIR: %c7 = arith.constant 7 : index
-! HLFIR: %[[VAL_5:.*]]:2 = hlfir.declare %[[VAL_4]] typeparams %c7 {{.*}}"_QMm_struct_ctorE.n.t_alloc"
-! HLFIR: %[[VAL_6:.*]] = fir.address_of(@_QMm_struct_ctorE.c.t_alloc)
-! HLFIR: %c0 = arith.constant 0 : index
-! HLFIR: %c2 = arith.constant 2 : index
-! HLFIR: %[[VAL_7:.*]] = fir.shape_shift %c0, %c2 : (index, index) -> !fir.shapeshift<1>
-! HLFIR: %[[VAL_8:.*]]:2 = hlfir.declare %[[VAL_6]](%[[VAL_7]]) {{.*}}"_QMm_struct_ctorE.c.t_alloc"
-! HLFIR: %[[VAL_9:.*]] = fir.address_of(@_QMm_struct_ctorE.dt.t_alloc)
-! HLFIR: %[[VAL_10:.*]]:2 = hlfir.declare %[[VAL_9]] {{.*}}"_QMm_struct_ctorE.dt.t_alloc"
! HLFIR: %[[VAL_11:.*]] = fir.address_of(@_QMm_struct_ctorFtest_alloc3Et1) : !fir.ref<!fir.type<_QMm_struct_ctorTt_alloc{x:f32,a:!fir.box<!fir.heap<!fir.array<?xi32>>>}>>
! HLFIR: {{.*}}:2 = hlfir.declare %[[VAL_11]] {uniq_name = "_QMm_struct_ctorFtest_alloc3Et1"}
! HLFIR: return
@@ -120,22 +81,6 @@ subroutine test_alloc4()
integer, pointer :: p(:)
type(t_alloc) :: t1 = t_alloc(x=5, a=null(p))
! HLFIR-LABEL: func.func @_QMm_struct_ctorPtest_alloc4() {
-! HLFIR: %[[VAL_0:.*]] = fir.address_of(@_QMm_struct_ctorE.n.x) : !fir.ref<!fir.char<1>>
-! HLFIR: %[[CONS_1:.*]] = arith.constant 1 : index
-! HLFIR: %[[VAL_1:.*]]:2 = hlfir.declare %[[VAL_0]] typeparams %[[CONS_1]] {{.*}}"_QMm_struct_ctorE.n.x"
-! HLFIR: %[[VAL_2:.*]] = fir.address_of(@_QMm_struct_ctorE.n.a) : !fir.ref<!fir.char<1>>
-! HLFIR: %[[CONS_2:.*]] = arith.constant 1 : index
-! HLFIR: %[[VAL_3:.*]]:2 = hlfir.declare %[[VAL_2]] typeparams %[[CONS_2]] {{.*}}"_QMm_struct_ctorE.n.a"
-! HLFIR: %[[VAL_4:.*]] = fir.address_of(@_QMm_struct_ctorE.n.t_alloc) : !fir.ref<!fir.char<1,7>>
-! HLFIR: %[[CONS_3:.*]] = arith.constant 7 : index
-! HLFIR: %[[VAL_5:.*]]:2 = hlfir.declare %[[VAL_4]] typeparams %[[CONS_3]] {{.*}}"_QMm_struct_ctorE.n.t_alloc"
-! HLFIR: %[[VAL_6:.*]] = fir.address_of(@_QMm_struct_ctorE.c.t_alloc)
-! HLFIR: %[[CONS_4:.*]] = arith.constant 0 : index
-! HLFIR: %[[CONS_5:.*]] = arith.constant 2 : index
-! HLFIR: %[[VAL_7:.*]] = fir.shape_shift %[[CONS_4]], %[[CONS_5]] : (index, index) -> !fir.shapeshift<1>
-! HLFIR: %[[VAL_8:.*]]:2 = hlfir.declare %[[VAL_6]](%[[VAL_7]]) {{.*}}"_QMm_struct_ctorE.c.t_alloc"
-! HLFIR: %[[VAL_9:.*]] = fir.address_of(@_QMm_struct_ctorE.dt.t_alloc)
-! HLFIR: %[[VAL_10:.*]]:2 = hlfir.declare %[[VAL_9]] {{.*}}"_QMm_struct_ctorE.dt.t_alloc"
! HLFIR: %[[VAL_11:.*]] = fir.alloca !fir.box<!fir.ptr<!fir.array<?xi32>>> {bindc_name = "p", uniq_name = "_QMm_struct_ctorFtest_alloc4Ep"}
! HLFIR: %[[VAL_12:.*]] = fir.zero_bits !fir.ptr<!fir.array<?xi32>>
! HLFIR: %[[CONS_6:.*]] = arith.constant 0 : index
@@ -150,3 +95,50 @@ subroutine test_alloc4()
end subroutine
end module m_struct_ctor
+
+subroutine test_character_1()
+ use m_struct_ctor, only : t_alloc_char
+ interface
+ subroutine takes_ta_alloc_char(x)
+ import t_alloc_char
+ type(t_alloc_char) :: x
+ end subroutine
+ end interface
+ call takes_ta_alloc_char(t_alloc_char("hello"))
+end subroutine
+! HLFIR-LABEL: func.func @_QPtest_character_1() {
+! HLFIR: %[[VAL_0:.*]] = fir.alloca !fir.type<_QMm_struct_ctorTt_alloc_char{a:!fir.box<!fir.heap<!fir.char<1,?>>>}>
+! HLFIR: %[[VAL_1:.*]]:2 = hlfir.declare %[[VAL_0]] {uniq_name = "ctor.temp"} : (!fir.ref<!fir.type<_QMm_struct_ctorTt_alloc_char{a:!fir.box<!fir.heap<!fir.char<1,?>>>}>>) -> (!fir.ref<!fir.type<_QMm_struct_ctorTt_alloc_char{a:!fir.box<!fir.heap<!fir.char<1,?>>>}>>, !fir.ref<!fir.type<_QMm_struct_ctorTt_alloc_char{a:!fir.box<!fir.heap<!fir.char<1,?>>>}>>)
+! HLFIR: %[[VAL_2:.*]] = fir.embox %[[VAL_1]]#0 : (!fir.ref<!fir.type<_QMm_struct_ctorTt_alloc_char{a:!fir.box<!fir.heap<!fir.char<1,?>>>}>>) -> !fir.box<!fir.type<_QMm_struct_ctorTt_alloc_char{a:!fir.box<!fir.heap<!fir.char<1,?>>>}>>
+! HLFIR: %[[VAL_5:.*]] = fir.convert %[[VAL_2]] : (!fir.box<!fir.type<_QMm_struct_ctorTt_alloc_char{a:!fir.box<!fir.heap<!fir.char<1,?>>>}>>) -> !fir.box<none>
+! HLFIR: %[[VAL_7:.*]] = fir.call @_FortranAInitialize(%[[VAL_5]],
+! HLFIR: %[[VAL_8:.*]] = hlfir.designate %[[VAL_1]]#0{"a"} {fortran_attrs = #fir.var_attrs<allocatable>} : (!fir.ref<!fir.type<_QMm_struct_ctorTt_alloc_char{a:!fir.box<!fir.heap<!fir.char<1,?>>>}>>) -> !fir.ref<!fir.box<!fir.heap<!fir.char<1,?>>>>
+! HLFIR: %[[VAL_9:.*]] = fir.address_of(@_QQclX68656C6C6F) : !fir.ref<!fir.char<1,5>>
+! HLFIR: %[[VAL_10:.*]] = arith.constant 5 : index
+! HLFIR: %[[VAL_11:.*]]:2 = hlfir.declare %[[VAL_9]] typeparams %[[VAL_10]] {fortran_attrs = #fir.var_attrs<parameter>, uniq_name = "_QQclX68656C6C6F"} : (!fir.ref<!fir.char<1,5>>, index) -> (!fir.ref<!fir.char<1,5>>, !fir.ref<!fir.char<1,5>>)
+! HLFIR: hlfir.assign %[[VAL_11]]#0 to %[[VAL_8]] realloc temporary_lhs : !fir.ref<!fir.char<1,5>>, !fir.ref<!fir.box<!fir.heap<!fir.char<1,?>>>>
+! HLFIR: fir.call @_QPtakes_ta_alloc_char(%[[VAL_1]]#1) fastmath<contract> : (!fir.ref<!fir.type<_QMm_struct_ctorTt_alloc_char{a:!fir.box<!fir.heap<!fir.char<1,?>>>}>>) -> ()
+
+subroutine test_character_2()
+ use m_struct_ctor, only : t_alloc_char_cst_len
+ interface
+ subroutine takes_ta_alloc_char_cst_len(x)
+ import t_alloc_char_cst_len
+ type(t_alloc_char_cst_len) :: x
+ end subroutine
+ end interface
+ call takes_ta_alloc_char_cst_len(t_alloc_char_cst_len("hello"))
+end subroutine
+! HLFIR-LABEL: func.func @_QPtest_character_2() {
+! HLFIR: %[[VAL_0:.*]] = fir.alloca !fir.type<_QMm_struct_ctorTt_alloc_char_cst_len{a:!fir.box<!fir.heap<!fir.char<1,2>>>}>
+! HLFIR: %[[VAL_1:.*]]:2 = hlfir.declare %[[VAL_0]] {uniq_name = "ctor.temp"} : (!fir.ref<!fir.type<_QMm_struct_ctorTt_alloc_char_cst_len{a:!fir.box<!fir.heap<!fir.char<1,2>>>}>>) -> (!fir.ref<!fir.type<_QMm_struct_ctorTt_alloc_char_cst_len{a:!fir.box<!fir.heap<!fir.char<1,2>>>}>>, !fir.ref<!fir.type<_QMm_struct_ctorTt_alloc_char_cst_len{a:!fir.box<!fir.heap<!fir.char<1,2>>>}>>)
+! HLFIR: %[[VAL_2:.*]] = fir.embox %[[VAL_1]]#0 : (!fir.ref<!fir.type<_QMm_struct_ctorTt_alloc_char_cst_len{a:!fir.box<!fir.heap<!fir.char<1,2>>>}>>) -> !fir.box<!fir.type<_QMm_struct_ctorTt_alloc_char_cst_len{a:!fir.box<!fir.heap<!fir.char<1,2>>>}>>
+! HLFIR: %[[VAL_5:.*]] = fir.convert %[[VAL_2]] : (!fir.box<!fir.type<_QMm_struct_ctorTt_alloc_char_cst_len{a:!fir.box<!fir.heap<!fir.char<1,2>>>}>>) -> !fir.box<none>
+! HLFIR: %[[VAL_7:.*]] = fir.call @_FortranAInitialize(%[[VAL_5]],
+! HLFIR: %[[VAL_8:.*]] = arith.constant 2 : index
+! HLFIR: %[[VAL_9:.*]] = hlfir.designate %[[VAL_1]]#0{"a"} typeparams %[[VAL_8]] {fortran_attrs = #fir.var_attrs<allocatable>} : (!fir.ref<!fir.type<_QMm_struct_ctorTt_alloc_char_cst_len{a:!fir.box<!fir.heap<!fir.char<1,2>>>}>>, index) -> !fir.ref<!fir.box<!fir.heap<!fir.char<1,2>>>>
+! HLFIR: %[[VAL_10:.*]] = fir.address_of(@_QQclX68656C6C6F) : !fir.ref<!fir.char<1,5>>
+! HLFIR: %[[VAL_11:.*]] = arith.constant 5 : index
+! HLFIR: %[[VAL_12:.*]]:2 = hlfir.declare %[[VAL_10]] typeparams %[[VAL_11]] {fortran_attrs = #fir.var_attrs<parameter>, uniq_name = "_QQclX68656C6C6F"} : (!fir.ref<!fir.char<1,5>>, index) -> (!fir.ref<!fir.char<1,5>>, !fir.ref<!fir.char<1,5>>)
+! HLFIR: hlfir.assign %[[VAL_12]]#0 to %[[VAL_9]] realloc keep_lhs_len temporary_lhs : !fir.ref<!fir.char<1,5>>, !fir.ref<!fir.box<!fir.heap<!fir.char<1,2>>>>
+! HLFIR: fir.call @_QPtakes_ta_alloc_char_cst_len(%[[VAL_1]]#1) fastmath<contract> : (!fir.ref<!fir.type<_QMm_struct_ctorTt_alloc_char_cst_len{a:!fir.box<!fir.heap<!fir.char<1,2>>>}>>) -> ()
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There is no need to gather the length parameters from the parameter symbols when facing a deferred length allocatable components in a structure constructor, the length is set as part of the assignment given the value.
Remove the checks for derived type runtime info symbols, this is not relevant for what is being tested here.