[flang][NFC] Add character lowering tests

[clementval]

Summary

This patch some lowering tests for characters related operations.

This patch is part of the upstreaming effort from fir-dev branch.

[PeteSteinfeld]

All builds and tests correctly and looks good.

flang/test/Lower/character-assignment.f90

+! RUN: bbc %s -o - -emit-fir | FileCheck %s
+
+! Simple character assignment tests
+! CHECK-LABEL: _QPassign1
+subroutine assign1(lhs, rhs)
+  character(*, 1) :: lhs, rhs
+  ! CHECK: %[[lhs:.*]]:2 = fir.unboxchar %arg0
+  ! CHECK: %[[rhs:.*]]:2 = fir.unboxchar %arg1
+  lhs = rhs
+  ! Compute minimum length
+  ! CHECK: %[[cmp_len:[0-9]+]] = arith.cmpi slt, %[[lhs:.*]]#1, %[[rhs:.*]]#1
+  ! CHECK-NEXT: %[[min_len:[0-9]+]] = arith.select %[[cmp_len]], %[[lhs]]#1, %[[rhs]]#1
+
+  ! Copy of rhs into lhs
+  ! CHECK: %[[count:.*]] = arith.muli %{{.*}}, %{{.*}} : i64
+  ! CHECK-DAG: %[[bug:.*]] = fir.convert %[[lhs]]#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+  ! CHECK-DAG: %[[src:.*]] = fir.convert %[[rhs]]#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+  ! CHECK: fir.call @llvm.memmove.p0i8.p0i8.i64(%{{.*}}, %[[src]], %[[count]], %false) : (!fir.ref<i8>, !fir.ref<i8>, i64, i1) -> ()
+
+  ! Padding
+  ! CHECK-DAG: %[[blank:.*]] = fir.insert_value %{{.*}}, %c32{{.*}}, [0 : index] : (!fir.char<1>, i8) -> !fir.char<1>
+  ! CHECK: fir.do_loop %[[ij:.*]] =
+    ! CHECK-DAG: %[[lhs_cast:.*]] = fir.convert %[[lhs]]#0
+    ! CHECK: %[[lhs_addr:.*]] = fir.coordinate_of %[[lhs_cast]], %[[ij]]
+    ! CHECK: fir.store %[[blank]] to %[[lhs_addr]]
+  ! CHECK-NEXT: }
+end subroutine
+
+! Test substring assignment
+! CHECK-LABEL: _QPassign_substring1
+subroutine assign_substring1(str, rhs, lb, ub)
+  character(*, 1) :: rhs, str
+  integer(8) :: lb, ub
+  str(lb:ub) = rhs
+  ! CHECK-DAG: %[[lb:.*]] = fir.load %arg2
+  ! CHECK-DAG: %[[ub:.*]] = fir.load %arg3
+  ! CHECK-DAG: %[[str:.*]]:2 = fir.unboxchar %arg0
+
+  ! Compute substring offset
+  ! CHECK-DAG: %[[lbi:.*]] = fir.convert %[[lb]] : (i64) -> index
+  ! CHECK-DAG: %[[c1:.*]] = arith.constant 1
+  ! CHECK-DAG: %[[offset:.*]] = arith.subi %[[lbi]], %[[c1]]
+  ! CHECK-DAG: %[[str_cast:.*]] = fir.convert %[[str]]#0
+  ! CHECK-DAG: %[[str_addr:.*]] = fir.coordinate_of %[[str_cast]], %[[offset]]
+  ! CHECK-DAG: %[[lhs_addr:.*]] = fir.convert %[[str_addr]]
+
+  ! Compute substring length
+  ! CHECK-DAG: %[[ubi:.*]] = fir.convert %[[ub]] : (i64) -> index
+  ! CHECK-DAG: %[[diff:.*]] = arith.subi %[[ubi]], %[[lbi]]
+  ! CHECK-DAG: %[[pre_lhs_len:.*]] = arith.addi %[[diff]], %[[c1]]
+  ! CHECK-DAG: %[[c0:.*]] = arith.constant 0
+  ! CHECK-DAG: %[[cmp_len:.*]] = arith.cmpi slt, %[[pre_lhs_len]], %[[c0]]
+
+  ! CHECK-DAG: %[[lhs_len:.*]] = arith.select %[[cmp_len]], %[[c0]], %[[pre_lhs_len]]
+
+  ! The rest of the assignment is just as the one above, only test that the
+  ! substring is the one used as lhs.
+  ! ...
+  ! CHECK: fir.do_loop %arg4 =
+  ! CHECK: %[[lhs_addr3:.*]] = fir.convert %[[lhs_addr]]
+  ! CHECK: fir.coordinate_of %[[lhs_addr3]], %arg4
+  ! ...
+end subroutine
+
+! CHECK-LABEL: _QPassign_constant
+! CHECK-SAME: (%[[ARG:.*]]:
+subroutine assign_constant(lhs)
+  character(*, 1) :: lhs
+  ! CHECK: %[[lhs:.*]]:2 = fir.unboxchar %arg0
+  ! CHECK: %[[cst:.*]] = fir.address_of(@{{.*}}) :
+  lhs = "Hello World"
+  ! CHECK-DAG: %[[dst:.*]] = fir.convert %[[lhs]]#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+  ! CHECK-DAG: %[[src:.*]] = fir.convert %[[cst]] : (!fir.ref<!fir.char<1,11>>) -> !fir.ref<i8>
+  ! CHECK-DAG: %[[count:.*]] = arith.muli %{{.*}}, %{{.*}} : i64
+  ! CHECK: fir.call @llvm.memmove.p0i8.p0i8.i64(%[[dst]], %[[src]], %[[count]], %false) : (!fir.ref<i8>, !fir.ref<i8>, i64, i1) -> ()
+
+  ! Padding
+  ! CHECK-DAG: %[[blank:.*]] = fir.insert_value %{{.*}}, %c32{{.*}}, [0 : index] : (!fir.char<1>, i8) -> !fir.char<1>
+  ! CHECK: fir.do_loop %[[j:.*]] = %{{.*}} to %{{.*}} {
+    ! CHECK-DAG: %[[jhs_cast:.*]] = fir.convert %[[lhs]]#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+    ! CHECK: %[[jhs_addr:.*]] = fir.coordinate_of %[[jhs_cast]], %[[j]]
+    ! CHECK: fir.store %[[blank]] to %[[jhs_addr]]
+  ! CHECK: }
+end subroutine
+
+  ! CHECK: func @_QPassign_zero_size_array
+  subroutine assign_zero_size_array(n)
+    ! CHECK:   %[[VAL_0:.*]] = fir.alloca !fir.heap<!fir.array<?x!fir.char<1,?>>> {uniq_name = "_QFassign_zero_size_arrayEa.addr"}
+    character(n), allocatable :: a(:)
+    ! CHECK:   fir.store %{{.*}} to %[[VAL_0]] : !fir.ref<!fir.heap<!fir.array<?x!fir.char<1,?>>>>
+    ! CHECK:   %{{.*}} = fir.load %[[VAL_0]] : !fir.ref<!fir.heap<!fir.array<?x!fir.char<1,?>>>>
+    ! CHECK:   %[[VAL_1:.*]] = arith.cmpi ne, %{{.*}}, %c0{{.*}} : i64
+    ! CHECK:   %[[VAL_2:.*]]:2 = fir.if %[[VAL_1]] -> (i1, !fir.heap<!fir.array<?x!fir.char<1,?>>>) {
+    ! CHECK:     %{{.*}} = fir.if %{{.*}} -> (!fir.heap<!fir.array<?x!fir.char<1,?>>>) {
+    ! CHECK:   %{{.*}} = fir.do_loop %{{.*}} = %c0{{.*}} to %{{.*}} step %c1{{.*}} unordered iter_args(%{{.*}} = %{{.*}}) -> (!fir.array<?x!fir.char<1,?>>) {
+    ! CHECK:     fir.do_loop %[[ARG_0:.*]] = %{{.*}} to {{.*}} step %c1{{.*}} {
+    ! CHECK:       %{{.*}} = fir.coordinate_of %{{.*}}, %[[ARG_0]] : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+    ! CHECK:   fir.if %[[VAL_2]]#0 {
+    ! CHECK:     fir.if %[[VAL_1]] {
+    ! CHECK:     fir.store %[[VAL_2]]#1 to %[[VAL_0]] : !fir.ref<!fir.heap<!fir.array<?x!fir.char<1,?>>>>
+    a = [character(n)::]
+    ! CHECK:   return
+  end subroutine
+
+! CHECK-LABEL: fir.global linkonce @_QQcl.48656C6C6F20576F726C64
+! CHECK: %[[lit:.*]] = fir.string_lit "Hello World"(11) : !fir.char<1,11>
+! CHECK: fir.has_value %[[lit]] : !fir.char<1,11>
+! CHECK: }

flang/test/Lower/character-compare.f90

+! RUN: bbc %s -o - | FileCheck %s
+
+! CHECK-LABEL: compare
+subroutine compare(x, c1, c2)
+  character(len=4) c1, c2
+  logical x
+  ! CHECK: %[[RES:.*]] = fir.call @_FortranACharacterCompareScalar1
+  ! CHECK: cmpi slt, %[[RES]],
+  x = c1 < c2
+end subroutine compare

flang/test/Lower/character-concatenation.f90

+! RUN: bbc -emit-fir %s -o - | FileCheck %s
+
+! Test character scalar concatenation lowering
+
+! CHECK-LABEL: concat_1
+subroutine concat_1(a, b)
+  ! CHECK-DAG: %[[a:.*]]:2 = fir.unboxchar %arg0
+  ! CHECK-DAG: %[[b:.*]]:2 = fir.unboxchar %arg1
+  character(*) :: a, b
+
+  ! CHECK: call @{{.*}}BeginExternalListOutput
+  print *, a // b
+  ! Concatenation
+
+  ! CHECK: %[[len:.*]] = arith.addi %[[a]]#1, %[[b]]#1
+  ! CHECK: %[[temp:.*]] = fir.alloca !fir.char<1,?>(%[[len]] : index)
+
+  ! CHECK-DAG: %[[c1:.*]] = arith.constant 1
+  ! CHECK-DAG: %[[a2:.*]] = fir.convert %[[a]]#1
+  ! CHECK: %[[count:.*]] = arith.muli %[[c1]], %[[a2]]
+  ! CHECK-DAG: constant false
+  ! CHECK-DAG: %[[to:.*]] = fir.convert %[[temp]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+  ! CHECK-DAG: %[[from:.*]] = fir.convert %[[a]]#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+  ! CHECK: fir.call @llvm.memmove.p0i8.p0i8.i64(%[[to]], %[[from]], %[[count]], %false) : (!fir.ref<i8>, !fir.ref<i8>, i64, i1) -> ()
+
+  ! CHECK: %[[c1_0:.*]] = arith.constant 1
+  ! CHECK: %[[count2:.*]] = arith.subi %[[len]], %[[c1_0]]
+  ! CHECK: fir.do_loop %[[index2:.*]] = %[[a]]#1 to %[[count2]] step %[[c1_0]] {
+    ! CHECK: %[[b_index:.*]] = arith.subi %[[index2]], %[[a]]#1
+    ! CHECK: %[[b_cast:.*]] = fir.convert %[[b]]#0
+    ! CHECK: %[[b_addr:.*]] = fir.coordinate_of %[[b_cast]], %[[b_index]]
+    ! CHECK-DAG: %[[b_elt:.*]] = fir.load %[[b_addr]]
+    ! CHECK: %[[temp_cast2:.*]] = fir.convert %[[temp]]
+    ! CHECK: %[[temp_addr2:.*]] = fir.coordinate_of %[[temp_cast2]], %[[index2]]
+    ! CHECK: fir.store %[[b_elt]] to %[[temp_addr2]]
+  ! CHECK: }
+
+  ! IO runtime call
+  ! CHECK-DAG: %[[raddr:.*]] = fir.convert %[[temp]]
+  ! CHECK-DAG: %[[rlen:.*]] = fir.convert %[[len]]
+  ! CHECK: call @{{.*}}OutputAscii(%{{.*}}, %[[raddr]], %[[rlen]])
+end subroutine

flang/test/Lower/character-elemental.f90

+! RUN: bbc %s -o - | FileCheck %s
+
+! CHECK-LABEL: substring_main
+subroutine substring_main
+  character*7 :: string(2) = ['12     ', '12     ']
+  integer :: result(2)
+  integer :: ival
+
+  ival = 1
+  ! CHECK: %[[a0:.*]] = fir.alloca i32 {bindc_name = "ival", uniq_name = "_QFsubstring_mainEival"}
+  ! CHECK: %[[a2:.*]] = fir.address_of(@_QFsubstring_mainEstring) : !fir.ref<!fir.array<2x!fir.char<1,7>>>
+  ! CHECK: fir.store {{.*}} to %[[a0]] : !fir.ref<i32>
+  ! CHECK: %[[a3:.*]] = fir.shape {{.*}} : (index) -> !fir.shape<1>
+  ! CHECK: %[[a4:.*]] = fir.slice {{.*}}, {{.*}}, {{.*}} : (index, index, index) -> !fir.slice<1>
+  ! CHECK: br ^bb1({{.*}}, {{.*}} : index, index)
+  ! CHECK: ^bb1(%[[a5:.*]]: index, %[[a6:.*]]: index):  // 2 preds: ^bb0, ^bb2
+  ! CHECK: %[[a7:.*]] = arith.cmpi sgt, %[[a6]], {{.*}} : index
+  ! CHECK: cond_br %[[a7]], ^bb2, ^bb3
+  ! CHECK: ^bb2:  // pred: ^bb1
+  ! CHECK: %[[a8:.*]] = arith.addi %[[a5]], {{.*}} : index
+  ! CHECK: %[[a9:.*]] = fir.array_coor %[[a2]](%[[a3]]) [%[[a4]]] %[[a8]] : (!fir.ref<!fir.array<2x!fir.char<1,7>>>, !fir.shape<1>, !fir.slice<1>, index) -> !fir.ref<!fir.char<1,7>>
+  ! CHECK: %[[a10:.*]] = fir.load %[[a0]] : !fir.ref<i32>
+  ! CHECK: %[[a11:.*]] = fir.convert %[[a10]] : (i32) -> index
+  ! CHECK: %[[a12:.*]] = arith.subi %[[a11]], {{.*}} : index
+  ! CHECK: %[[a13:.*]] = fir.convert %[[a9]] : (!fir.ref<!fir.char<1,7>>) -> !fir.ref<!fir.array<7x!fir.char<1>>>
+  ! CHECK: %[[a14:.*]] = fir.coordinate_of %[[a13]], %[[a12]] : (!fir.ref<!fir.array<7x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+  ! CHECK: %[[a15:.*]] = fir.convert %[[a14]] : (!fir.ref<!fir.char<1>>) -> !fir.ref<!fir.char<1,?>>
+  ! CHECK: %[[a16:.*]] = fir.emboxchar %[[a15]], {{.*}} : (!fir.ref<!fir.char<1,?>>, index) -> !fir.boxchar<1>
+  ! CHECK: %[[a17:.*]] = fir.call @_QFsubstring_mainPinner(%[[a16]]) : (!fir.boxchar<1>) -> i32
+  result = inner(string(1:2)(ival:ival))
+  print *, result
+contains
+  elemental function inner(arg)
+    character(len=*), intent(in) :: arg
+    integer :: inner
+
+    inner = len(arg)
+  end function inner
+end subroutine substring_main

flang/test/Lower/character-local-variables.f90

+! RUN: bbc %s -o - | FileCheck %s
+
+! Test lowering of local character variables
+
+! CHECK-LABEL: func @_QPscalar_cst_len
+subroutine scalar_cst_len()
+  character(10) :: c
+  ! CHECK: fir.alloca !fir.char<1,10> {{{.*}}uniq_name = "_QFscalar_cst_lenEc"}
+end subroutine
+
+! CHECK-LABEL: func @_QPscalar_dyn_len
+! CHECK-SAME: %[[arg0:.*]]: !fir.ref<i32>
+subroutine scalar_dyn_len(l)
+  integer :: l
+  character(l) :: c
+  ! CHECK: %[[lexpr:.*]] = fir.load %[[arg0]] : !fir.ref<i32>
+  ! CHECK: %[[is_positive:.*]] = arith.cmpi sgt, %[[lexpr]], %c0{{.*}} : i32
+  ! CHECK: %[[l:.*]] = arith.select %[[is_positive]], %[[lexpr]], %c0{{.*}} : i32
+  ! CHECK: fir.alloca !fir.char<1,?>(%[[l]] : i32) {{{.*}}uniq_name = "_QFscalar_dyn_lenEc"}
+end subroutine
+
+! CHECK-LABEL: func @_QPcst_array_cst_len
+subroutine cst_array_cst_len()
+  character(10) :: c(20)
+  ! CHECK: fir.alloca !fir.array<20x!fir.char<1,10>> {{{.*}}uniq_name = "_QFcst_array_cst_lenEc"}
+end subroutine
+
+! CHECK-LABEL: func @_QPcst_array_dyn_len
+! CHECK-SAME: %[[arg0:.*]]: !fir.ref<i32>
+subroutine cst_array_dyn_len(l)
+  integer :: l
+  character(l) :: c(10)
+  ! CHECK: %[[lexpr:.*]] = fir.load %[[arg0]] : !fir.ref<i32>
+  ! CHECK: %[[is_positive:.*]] = arith.cmpi sgt, %[[lexpr]], %c0{{.*}} : i32
+  ! CHECK: %[[l:.*]] = arith.select %[[is_positive]], %[[lexpr]], %c0{{.*}} : i32
+  ! CHECK: fir.alloca !fir.array<10x!fir.char<1,?>>(%[[l]] : i32) {{{.*}}uniq_name = "_QFcst_array_dyn_lenEc"}
+end subroutine
+
+! CHECK-LABEL: func @_QPdyn_array_cst_len
+! CHECK-SAME: %[[arg0:.*]]: !fir.ref<i32>
+subroutine dyn_array_cst_len(n)
+  integer :: n
+  character(10) :: c(n)
+  ! CHECK: %[[n:.*]] = fir.load %[[arg0]] : !fir.ref<i32>
+  ! CHECK: %[[ni:.*]] = fir.convert %[[n]] : (i32) -> index
+  ! CHECK: fir.alloca !fir.array<?x!fir.char<1,10>>, %[[ni]] {{{.*}}uniq_name = "_QFdyn_array_cst_lenEc"}
+end subroutine
+
+! CHECK: func @_QPdyn_array_dyn_len
+! CHECK-SAME: %[[arg0:.*]]: !fir.ref<i32>{{.*}}, %[[arg1:.*]]: !fir.ref<i32>
+subroutine dyn_array_dyn_len(l, n)
+  integer :: l, n
+  character(l) :: c(n)
+  ! CHECK-DAG: %[[lexpr:.*]] = fir.load %[[arg0]] : !fir.ref<i32>
+  ! CHECK-DAG: %[[is_positive:.*]] = arith.cmpi sgt, %[[lexpr]], %c0{{.*}} : i32
+  ! CHECK-DAG: %[[l:.*]] = arith.select %[[is_positive]], %[[lexpr]], %c0{{.*}} : i32
+  ! CHECK-DAG: %[[n:.*]] = fir.load %[[arg1]] : !fir.ref<i32>
+  ! CHECK: %[[ni:.*]] = fir.convert %[[n]] : (i32) -> index
+  ! CHECK: fir.alloca !fir.array<?x!fir.char<1,?>>(%[[l]] : i32), %[[ni]] {{{.*}}uniq_name = "_QFdyn_array_dyn_lenEc"}
+end subroutine
+
+! CHECK-LABEL: func @_QPcst_array_cst_len_lb
+subroutine cst_array_cst_len_lb()
+  character(10) :: c(11:30)
+  ! CHECK: fir.alloca !fir.array<20x!fir.char<1,10>> {{{.*}}uniq_name = "_QFcst_array_cst_len_lbEc"}
+end subroutine
+
+! CHECK-LABEL: func @_QPcst_array_dyn_len_lb
+! CHECK-SAME: %[[arg0:.*]]: !fir.ref<i64>
+subroutine cst_array_dyn_len_lb(l)
+  integer(8) :: l
+  character(l) :: c(11:20)
+  ! CHECK: %[[lexpr:.*]] = fir.load %[[arg0]] : !fir.ref<i64>
+  ! CHECK: %[[is_positive:.*]] = arith.cmpi sgt, %[[lexpr]], %c0{{.*}} : i64
+  ! CHECK: %[[l:.*]] = arith.select %[[is_positive]], %[[lexpr]], %c0{{.*}} : i64
+  ! CHECK: fir.alloca !fir.array<10x!fir.char<1,?>>(%[[l]] : i64) {{{.*}}uniq_name = "_QFcst_array_dyn_len_lbEc"}
+end subroutine
+
+! CHECK-LABEL: func @_QPdyn_array_cst_len_lb
+! CHECK-SAME: %[[arg0:.*]]: !fir.ref<i64>
+subroutine dyn_array_cst_len_lb(n)
+  integer(8) :: n
+  character(10) :: c(11:n)
+  ! CHECK-DAG: %[[cm10:.*]] = arith.constant -10 : index
+  ! CHECK-DAG: %[[n:.*]] = fir.load %[[arg0]] : !fir.ref<i64>
+  ! CHECK-DAG: %[[ni:.*]] = fir.convert %[[n]] : (i64) -> index
+  ! CHECK: %[[extent:.*]] = arith.addi %[[ni]], %[[cm10]] : index
+  ! CHECK: fir.alloca !fir.array<?x!fir.char<1,10>>, %[[extent]] {{{.*}}uniq_name = "_QFdyn_array_cst_len_lbEc"}
+end subroutine
+
+! CHECK-LABEL: func @_QPdyn_array_dyn_len_lb
+! CHECK-SAME: %[[arg0:.*]]: !fir.ref<i64>{{.*}}, %[[arg1:.*]]: !fir.ref<i64>
+subroutine dyn_array_dyn_len_lb(l, n)
+  integer(8) :: l, n
+  character(l) :: c(11:n)
+  ! CHECK-DAG: %[[cm10:.*]] = arith.constant -10 : index
+  ! CHECK-DAG: %[[lexpr:.*]] = fir.load %[[arg0]] : !fir.ref<i64>
+  ! CHECK-DAG: %[[is_positive:.*]] = arith.cmpi sgt, %[[lexpr]], %c0{{.*}} : i64
+  ! CHECK-DAG: %[[l:.*]] = arith.select %[[is_positive]], %[[lexpr]], %c0{{.*}} : i64
+  ! CHECK-DAG: %[[n:.*]] = fir.load %[[arg1]] : !fir.ref<i64>
+  ! CHECK-DAG: %[[ni:.*]] = fir.convert %[[n]] : (i64) -> index
+  ! CHECK: %[[extent:.*]] = arith.addi %[[ni]], %[[cm10]] : index
+  ! CHECK: fir.alloca !fir.array<?x!fir.char<1,?>>(%[[l]] : i64), %[[extent]] {{{.*}}uniq_name = "_QFdyn_array_dyn_len_lbEc"}
+end subroutine
+
+! Test that the length of assumed length parameter is correctly deduced in lowering.
+! CHECK-LABEL: func @_QPassumed_length_param
+subroutine assumed_length_param(n)
+  character(*), parameter :: c(1)=(/"abcd"/)
+  integer :: n
+  ! CHECK: %[[c4:.*]] = arith.constant 4 : index
+  ! CHECK: %[[len:.*]] = fir.convert %[[c4]] : (index) -> i64
+  ! CHECK: fir.store %[[len]] to %[[tmp:.*]] : !fir.ref<i64>
+  ! CHECK: fir.call @_QPtake_int(%[[tmp]]) : (!fir.ref<i64>) -> ()
+  call take_int(len(c(n), kind=8))
+end
+
+! CHECK-LABEL: func @_QPscalar_cst_neg_len
+subroutine scalar_cst_neg_len()
+  character(-1) :: c
+  ! CHECK: fir.alloca !fir.char<1,0> {{{.*}}uniq_name = "_QFscalar_cst_neg_lenEc"}
+end subroutine

flang/test/Lower/character-substrings.f90

+! Test character substring lowering
+! RUN: bbc %s -o - -emit-fir | FileCheck %s
+
+! Test substring lower where the parent is a scalar-char-literal-constant
+! CHECK-LABEL: func @_QPscalar_substring_embox(
+! CHECK-SAME:  %[[VAL_0:.*]]: !fir.ref<i64>{{.*}}, %[[VAL_1:.*]]: !fir.ref<i64>{{.*}}) {
+subroutine scalar_substring_embox(i, j)
+  ! CHECK:         %[[VAL_2:.*]] = fir.address_of(@_QQcl.{{.*}}) : !fir.ref<!fir.char<1,18>>
+  ! CHECK:         %[[VAL_3:.*]] = fir.load %[[VAL_0]] : !fir.ref<i64>
+  ! CHECK:         %[[VAL_4:.*]] = fir.load %[[VAL_1]] : !fir.ref<i64>
+  ! CHECK:         %[[VAL_5:.*]] = fir.convert %[[VAL_3]] : (i64) -> index
+  ! CHECK:         %[[VAL_6:.*]] = fir.convert %[[VAL_4]] : (i64) -> index
+  ! CHECK:         %[[VAL_7:.*]] = arith.constant 1 : index
+  ! CHECK:         %[[VAL_8:.*]] = arith.subi %[[VAL_5]], %[[VAL_7]] : index
+  ! CHECK:         %[[VAL_9:.*]] = fir.convert %[[VAL_2]] : (!fir.ref<!fir.char<1,18>>) -> !fir.ref<!fir.array<18x!fir.char<1>>>
+  ! CHECK:         %[[VAL_10:.*]] = fir.coordinate_of %[[VAL_9]], %[[VAL_8]] : (!fir.ref<!fir.array<18x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+  ! CHECK:         %[[VAL_11:.*]] = fir.convert %[[VAL_10]] : (!fir.ref<!fir.char<1>>) -> !fir.ref<!fir.char<1,?>>
+  ! CHECK:         %[[VAL_12:.*]] = arith.subi %[[VAL_6]], %[[VAL_5]] : index
+  ! CHECK:         %[[VAL_13:.*]] = arith.addi %[[VAL_12]], %[[VAL_7]] : index
+  ! CHECK:         %[[VAL_14:.*]] = arith.constant 0 : index
+  ! CHECK:         %[[VAL_15:.*]] = arith.cmpi slt, %[[VAL_13]], %[[VAL_14]] : index
+  ! CHECK:         %[[VAL_16:.*]] = arith.select %[[VAL_15]], %[[VAL_14]], %[[VAL_13]] : index
+  ! CHECK:         %[[VAL_17:.*]] = fir.emboxchar %[[VAL_11]], %[[VAL_16]] : (!fir.ref<!fir.char<1,?>>, index) -> !fir.boxchar<1>
+  ! CHECK:         fir.call @_QPbar(%[[VAL_17]]) : (!fir.boxchar<1>) -> ()
+  integer(8) :: i, j
+  call bar("abcHello World!dfg"(i:j))
+  ! CHECK:         return
+  ! CHECK:       }
+end subroutine scalar_substring_embox
+
+! CHECK-LABEL: func @_QParray_substring_embox(
+! CHECK-SAME:        %[[VAL_0:.*]]: !fir.boxchar<1>{{.*}}) {
+! CHECK:         %[[VAL_1:.*]]:2 = fir.unboxchar %[[VAL_0]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+! CHECK:         %[[VAL_2:.*]] = fir.convert %[[VAL_1]]#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<4x!fir.char<1,7>>>
+! CHECK:         %[[VAL_3:.*]] = arith.constant 4 : index
+! CHECK:         %[[VAL_4:.*]] = arith.constant 1 : index
+! CHECK:         %[[VAL_5:.*]] = arith.constant 1 : i64
+! CHECK:         %[[VAL_6:.*]] = fir.convert %[[VAL_5]] : (i64) -> index
+! CHECK:         %[[VAL_7:.*]] = arith.addi %[[VAL_4]], %[[VAL_3]] : index
+! CHECK:         %[[VAL_8:.*]] = arith.subi %[[VAL_7]], %[[VAL_4]] : index
+! CHECK:         %[[VAL_9:.*]] = fir.shape %[[VAL_3]] : (index) -> !fir.shape<1>
+! CHECK:         %[[VAL_10:.*]] = arith.constant 5 : i64
+! CHECK:         %[[VAL_11:.*]] = arith.constant 7 : i64
+! CHECK:         %[[VAL_12:.*]] = arith.constant 1 : i64
+! CHECK:         %[[VAL_13:.*]] = arith.subi %[[VAL_10]], %[[VAL_12]] : i64
+! CHECK:         %[[VAL_14:.*]] = arith.constant 0 : i64
+! CHECK:         %[[VAL_15:.*]] = arith.subi %[[VAL_11]], %[[VAL_13]] : i64
+! CHECK:         %[[VAL_16:.*]] = arith.cmpi sgt, %[[VAL_15]], %[[VAL_14]] : i64
+! CHECK:         %[[VAL_17:.*]] = arith.select %[[VAL_16]], %[[VAL_15]], %[[VAL_14]] : i64
+! CHECK:         %[[VAL_18:.*]] = fir.slice %[[VAL_4]], %[[VAL_8]], %[[VAL_6]] substr %[[VAL_13]], %[[VAL_17]] : (index, index, index, i64, i64) -> !fir.slice<1>
+! CHECK:         %[[VAL_19:.*]] = fir.embox %[[VAL_2]](%[[VAL_9]]) {{\[}}%[[VAL_18]]] : (!fir.ref<!fir.array<4x!fir.char<1,7>>>, !fir.shape<1>, !fir.slice<1>) -> !fir.box<!fir.array<?x!fir.char<1,?>>>
+! CHECK:         %[[VAL_20:.*]] = fir.convert %[[VAL_19]] : (!fir.box<!fir.array<?x!fir.char<1,?>>>) -> !fir.box<!fir.array<?x!fir.char<1>>>
+! CHECK:         fir.call @_QPs(%[[VAL_20]]) : (!fir.box<!fir.array<?x!fir.char<1>>>) -> ()
+! CHECK:         return
+! CHECK:       }
+
+subroutine array_substring_embox(arr)
+  interface
+    subroutine s(a)
+     character(1) :: a(:)
+    end subroutine s
+  end interface
+
+  character(7) arr(4)
+
+  call s(arr(:)(5:7))
+end subroutine array_substring_embox
+
+! CHECK-LABEL: func @_QPsubstring_assignment(
+! CHECK-SAME:        %[[VAL_0:.*]]: !fir.boxchar<1>{{.*}}, %[[VAL_1:.*]]: !fir.boxchar<1>{{.*}}) {
+subroutine substring_assignment(a,b)
+  ! CHECK:         %[[VAL_2:.*]]:2 = fir.unboxchar %[[VAL_0]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+  ! CHECK:         %[[VAL_3:.*]]:2 = fir.unboxchar %[[VAL_1]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+  ! CHECK:         %[[VAL_4:.*]] = arith.constant 3 : i64
+  ! CHECK:         %[[VAL_5:.*]] = arith.constant 4 : i64
+  ! CHECK:         %[[VAL_6:.*]] = fir.convert %[[VAL_4]] : (i64) -> index
+  ! CHECK:         %[[VAL_7:.*]] = fir.convert %[[VAL_5]] : (i64) -> index
+  ! CHECK:         %[[VAL_8:.*]] = arith.constant 1 : index
+  ! CHECK:         %[[VAL_9:.*]] = arith.subi %[[VAL_6]], %[[VAL_8]] : index
+  ! CHECK:         %[[VAL_10:.*]] = fir.convert %[[VAL_3]]#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+  ! CHECK:         %[[VAL_11:.*]] = fir.coordinate_of %[[VAL_10]], %[[VAL_9]] : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+  ! CHECK:         %[[VAL_12:.*]] = fir.convert %[[VAL_11]] : (!fir.ref<!fir.char<1>>) -> !fir.ref<!fir.char<1,?>>
+  ! CHECK:         %[[VAL_13:.*]] = arith.subi %[[VAL_7]], %[[VAL_6]] : index
+  ! CHECK:         %[[VAL_14:.*]] = arith.addi %[[VAL_13]], %[[VAL_8]] : index
+  ! CHECK:         %[[VAL_15:.*]] = arith.constant 0 : index
+  ! CHECK:         %[[VAL_16:.*]] = arith.cmpi slt, %[[VAL_14]], %[[VAL_15]] : index
+  ! CHECK:         %[[VAL_17:.*]] = arith.select %[[VAL_16]], %[[VAL_15]], %[[VAL_14]] : index
+  ! CHECK:         %[[VAL_18:.*]] = arith.constant 1 : i64
+  ! CHECK:         %[[VAL_19:.*]] = arith.constant 2 : i64
+  ! CHECK:         %[[VAL_20:.*]] = fir.convert %[[VAL_18]] : (i64) -> index
+  ! CHECK:         %[[VAL_21:.*]] = fir.convert %[[VAL_19]] : (i64) -> index
+  ! CHECK:         %[[VAL_22:.*]] = arith.constant 1 : index
+  ! CHECK:         %[[VAL_23:.*]] = arith.subi %[[VAL_20]], %[[VAL_22]] : index
+  ! CHECK:         %[[VAL_24:.*]] = fir.convert %[[VAL_2]]#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+  ! CHECK:         %[[VAL_25:.*]] = fir.coordinate_of %[[VAL_24]], %[[VAL_23]] : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+  ! CHECK:         %[[VAL_26:.*]] = fir.convert %[[VAL_25]] : (!fir.ref<!fir.char<1>>) -> !fir.ref<!fir.char<1,?>>
+  ! CHECK:         %[[VAL_27:.*]] = arith.subi %[[VAL_21]], %[[VAL_20]] : index
+  ! CHECK:         %[[VAL_28:.*]] = arith.addi %[[VAL_27]], %[[VAL_22]] : index
+  ! CHECK:         %[[VAL_29:.*]] = arith.constant 0 : index
+  ! CHECK:         %[[VAL_30:.*]] = arith.cmpi slt, %[[VAL_28]], %[[VAL_29]] : index
+  ! CHECK:         %[[VAL_31:.*]] = arith.select %[[VAL_30]], %[[VAL_29]], %[[VAL_28]] : index
+  ! CHECK:         %[[VAL_32:.*]] = arith.cmpi slt, %[[VAL_31]], %[[VAL_17]] : index
+  ! CHECK:         %[[VAL_33:.*]] = arith.select %[[VAL_32]], %[[VAL_31]], %[[VAL_17]] : index
+  ! CHECK:         %[[VAL_34:.*]] = arith.constant 1 : i64
+  ! CHECK:         %[[VAL_35:.*]] = fir.convert %[[VAL_33]] : (index) -> i64
+  ! CHECK:         %[[VAL_36:.*]] = arith.muli %[[VAL_34]], %[[VAL_35]] : i64
+  ! CHECK:         %[[VAL_37:.*]] = arith.constant false
+  ! CHECK:         %[[VAL_38:.*]] = fir.convert %[[VAL_26]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+  ! CHECK:         %[[VAL_39:.*]] = fir.convert %[[VAL_12]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+  ! CHECK:         fir.call @llvm.memmove.p0i8.p0i8.i64(%[[VAL_38]], %[[VAL_39]], %[[VAL_36]], %[[VAL_37]]) : (!fir.ref<i8>, !fir.ref<i8>, i64, i1) -> ()
+  ! CHECK:         %[[VAL_40:.*]] = arith.constant 1 : index
+  ! CHECK:         %[[VAL_41:.*]] = arith.subi %[[VAL_31]], %[[VAL_40]] : index
+  ! CHECK:         %[[VAL_42:.*]] = arith.constant 32 : i8
+  ! CHECK:         %[[VAL_43:.*]] = fir.undefined !fir.char<1>
+  ! CHECK:         %[[VAL_44:.*]] = fir.insert_value %[[VAL_43]], %[[VAL_42]], [0 : index] : (!fir.char<1>, i8) -> !fir.char<1>
+  ! CHECK:         %[[VAL_45:.*]] = arith.constant 1 : index
+  ! CHECK:         fir.do_loop %[[VAL_46:.*]] = %[[VAL_33]] to %[[VAL_41]] step %[[VAL_45]] {
+  ! CHECK:           %[[VAL_47:.*]] = fir.convert %[[VAL_26]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+  ! CHECK:           %[[VAL_48:.*]] = fir.coordinate_of %[[VAL_47]], %[[VAL_46]] : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+  ! CHECK:           fir.store %[[VAL_44]] to %[[VAL_48]] : !fir.ref<!fir.char<1>>
+  ! CHECK:         }
+  
+  character(4) :: a, b
+  a(1:2) = b(3:4)
+  ! CHECK:         return
+  ! CHECK:       }
+end subroutine substring_assignment
+
+! CHECK-LABEL: func @_QParray_substring_assignment(
+! CHECK-SAME:        %[[VAL_0:.*]]: !fir.boxchar<1>{{.*}}) {
+! CHECK:         %[[VAL_1:.*]]:2 = fir.unboxchar %[[VAL_0]] : (!fir.boxchar<1>) -> (!fir.ref<!fir.char<1,?>>, index)
+! CHECK:         %[[VAL_2:.*]] = fir.convert %[[VAL_1]]#0 : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<6x!fir.char<1,5>>>
+! CHECK:         %[[VAL_3:.*]] = arith.constant 6 : index
+! CHECK:         %[[VAL_4:.*]] = arith.constant 1 : index
+! CHECK:         %[[VAL_5:.*]] = arith.constant 1 : i64
+! CHECK:         %[[VAL_6:.*]] = fir.convert %[[VAL_5]] : (i64) -> index
+! CHECK:         %[[VAL_7:.*]] = arith.addi %[[VAL_4]], %[[VAL_3]] : index
+! CHECK:         %[[VAL_8:.*]] = arith.subi %[[VAL_7]], %[[VAL_4]] : index
+! CHECK:         %[[VAL_9:.*]] = arith.constant 0 : index
+! CHECK:         %[[VAL_10:.*]] = arith.subi %[[VAL_8]], %[[VAL_4]] : index
+! CHECK:         %[[VAL_11:.*]] = arith.addi %[[VAL_10]], %[[VAL_6]] : index
+! CHECK:         %[[VAL_12:.*]] = arith.divsi %[[VAL_11]], %[[VAL_6]] : index
+! CHECK:         %[[VAL_13:.*]] = arith.cmpi sgt, %[[VAL_12]], %[[VAL_9]] : index
+! CHECK:         %[[VAL_14:.*]] = arith.select %[[VAL_13]], %[[VAL_12]], %[[VAL_9]] : index
+! CHECK:         %[[VAL_15:.*]] = fir.shape %[[VAL_3]] : (index) -> !fir.shape<1>
+! CHECK:         %[[VAL_16:.*]] = fir.slice %[[VAL_4]], %[[VAL_8]], %[[VAL_6]] : (index, index, index) -> !fir.slice<1>
+! CHECK:         %[[VAL_17:.*]] = fir.array_load %[[VAL_2]](%[[VAL_15]]) {{\[}}%[[VAL_16]]] : (!fir.ref<!fir.array<6x!fir.char<1,5>>>, !fir.shape<1>, !fir.slice<1>) -> !fir.array<6x!fir.char<1,5>>
+! CHECK:         %[[VAL_18:.*]] = fir.address_of(@_QQcl.424144) : !fir.ref<!fir.char<1,3>>
+! CHECK:         %[[VAL_19:.*]] = arith.constant 3 : index
+! CHECK:         %[[VAL_20:.*]] = arith.constant 1 : index
+! CHECK:         %[[VAL_21:.*]] = arith.constant 0 : index
+! CHECK:         %[[VAL_22:.*]] = arith.subi %[[VAL_14]], %[[VAL_20]] : index
+! CHECK:         %[[VAL_23:.*]] = fir.do_loop %[[VAL_24:.*]] = %[[VAL_21]] to %[[VAL_22]] step %[[VAL_20]] unordered iter_args(%[[VAL_25:.*]] = %[[VAL_17]]) -> (!fir.array<6x!fir.char<1,5>>) {
+! CHECK:           %[[VAL_26:.*]] = fir.array_access %[[VAL_25]], %[[VAL_24]] : (!fir.array<6x!fir.char<1,5>>, index) -> !fir.ref<!fir.char<1,5>>
+! CHECK:           %[[VAL_27:.*]] = arith.constant 3 : i64
+! CHECK:           %[[VAL_28:.*]] = arith.constant 5 : i64
+! CHECK:           %[[VAL_29:.*]] = fir.convert %[[VAL_27]] : (i64) -> index
+! CHECK:           %[[VAL_30:.*]] = fir.convert %[[VAL_28]] : (i64) -> index
+! CHECK:           %[[VAL_31:.*]] = arith.constant 1 : index
+! CHECK:           %[[VAL_32:.*]] = arith.subi %[[VAL_29]], %[[VAL_31]] : index
+! CHECK:           %[[VAL_33:.*]] = fir.convert %[[VAL_26]] : (!fir.ref<!fir.char<1,5>>) -> !fir.ref<!fir.array<5x!fir.char<1>>>
+! CHECK:           %[[VAL_34:.*]] = fir.coordinate_of %[[VAL_33]], %[[VAL_32]] : (!fir.ref<!fir.array<5x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+! CHECK:           %[[VAL_35:.*]] = fir.convert %[[VAL_34]] : (!fir.ref<!fir.char<1>>) -> !fir.ref<!fir.char<1,?>>
+! CHECK:           %[[VAL_36:.*]] = arith.subi %[[VAL_30]], %[[VAL_29]] : index
+! CHECK:           %[[VAL_37:.*]] = arith.addi %[[VAL_36]], %[[VAL_31]] : index
+! CHECK:           %[[VAL_38:.*]] = arith.constant 0 : index
+! CHECK:           %[[VAL_39:.*]] = arith.cmpi slt, %[[VAL_37]], %[[VAL_38]] : index
+! CHECK:           %[[VAL_40:.*]] = arith.select %[[VAL_39]], %[[VAL_38]], %[[VAL_37]] : index
+! CHECK:           %[[VAL_41:.*]] = arith.constant 0 : index
+! CHECK:           %[[VAL_42:.*]] = arith.constant 1 : index
+! CHECK:           %[[VAL_43:.*]] = fir.convert %[[VAL_40]] : (index) -> index
+! CHECK:           %[[VAL_44:.*]] = arith.subi %[[VAL_43]], %[[VAL_42]] : index
+! CHECK:           fir.do_loop %[[VAL_45:.*]] = %[[VAL_41]] to %[[VAL_44]] step %[[VAL_42]] {
+! CHECK:             %[[VAL_46:.*]] = fir.convert %[[VAL_19]] : (index) -> index
+! CHECK:             %[[VAL_47:.*]] = arith.cmpi slt, %[[VAL_45]], %[[VAL_46]] : index
+! CHECK:             fir.if %[[VAL_47]] {
+! CHECK:               %[[VAL_48:.*]] = fir.convert %[[VAL_18]] : (!fir.ref<!fir.char<1,3>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+! CHECK:               %[[VAL_49:.*]] = fir.coordinate_of %[[VAL_48]], %[[VAL_45]] : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+! CHECK:               %[[VAL_50:.*]] = fir.load %[[VAL_49]] : !fir.ref<!fir.char<1>>
+! CHECK:               %[[VAL_51:.*]] = fir.convert %[[VAL_35]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+! CHECK:               %[[VAL_52:.*]] = fir.coordinate_of %[[VAL_51]], %[[VAL_45]] : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+! CHECK:               fir.store %[[VAL_50]] to %[[VAL_52]] : !fir.ref<!fir.char<1>>
+! CHECK:             } else {
+! CHECK:               %[[VAL_53:.*]] = fir.string_lit [32 : i8](1) : !fir.char<1>
+! CHECK:               %[[VAL_54:.*]] = fir.convert %[[VAL_35]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+! CHECK:               %[[VAL_55:.*]] = fir.coordinate_of %[[VAL_54]], %[[VAL_45]] : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+! CHECK:               fir.store %[[VAL_53]] to %[[VAL_55]] : !fir.ref<!fir.char<1>>
+! CHECK:             }
+! CHECK:           }
+! CHECK:           %[[VAL_56:.*]] = arith.cmpi slt, %[[VAL_40]], %[[VAL_19]] : index
+! CHECK:           %[[VAL_57:.*]] = arith.select %[[VAL_56]], %[[VAL_40]], %[[VAL_19]] : index
+! CHECK:           %[[VAL_58:.*]] = arith.constant 1 : i64
+! CHECK:           %[[VAL_59:.*]] = fir.convert %[[VAL_57]] : (index) -> i64
+! CHECK:           %[[VAL_60:.*]] = arith.muli %[[VAL_58]], %[[VAL_59]] : i64
+! CHECK:           %[[VAL_61:.*]] = arith.constant false
+! CHECK:           %[[VAL_62:.*]] = fir.convert %[[VAL_35]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+! CHECK:           %[[VAL_63:.*]] = fir.convert %[[VAL_18]] : (!fir.ref<!fir.char<1,3>>) -> !fir.ref<i8>
+! CHECK:           fir.call @llvm.memmove.p0i8.p0i8.i64(%[[VAL_62]], %[[VAL_63]], %[[VAL_60]], %[[VAL_61]]) : (!fir.ref<i8>, !fir.ref<i8>, i64, i1) -> ()
+! CHECK:           %[[VAL_64:.*]] = arith.constant 1 : index
+! CHECK:           %[[VAL_65:.*]] = arith.subi %[[VAL_40]], %[[VAL_64]] : index
+! CHECK:           %[[VAL_66:.*]] = arith.constant 32 : i8
+! CHECK:           %[[VAL_67:.*]] = fir.undefined !fir.char<1>
+! CHECK:           %[[VAL_68:.*]] = fir.insert_value %[[VAL_67]], %[[VAL_66]], [0 : index] : (!fir.char<1>, i8) -> !fir.char<1>
+! CHECK:           %[[VAL_69:.*]] = arith.constant 1 : index
+! CHECK:           fir.do_loop %[[VAL_70:.*]] = %[[VAL_57]] to %[[VAL_65]] step %[[VAL_69]] {
+! CHECK:             %[[VAL_71:.*]] = fir.convert %[[VAL_35]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+! CHECK:             %[[VAL_72:.*]] = fir.coordinate_of %[[VAL_71]], %[[VAL_70]] : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+! CHECK:             fir.store %[[VAL_68]] to %[[VAL_72]] : !fir.ref<!fir.char<1>>
+! CHECK:           }
+! CHECK:           %[[VAL_73:.*]] = fir.array_amend %[[VAL_25]], %[[VAL_26]] : (!fir.array<6x!fir.char<1,5>>, !fir.ref<!fir.char<1,5>>) -> !fir.array<6x!fir.char<1,5>>
+! CHECK:           fir.result %[[VAL_73]] : !fir.array<6x!fir.char<1,5>>
+! CHECK:         }
+! CHECK:         fir.array_merge_store %[[VAL_17]], %[[VAL_74:.*]] to %[[VAL_2]]{{\[}}%[[VAL_16]]] : !fir.array<6x!fir.char<1,5>>, !fir.array<6x!fir.char<1,5>>, !fir.ref<!fir.array<6x!fir.char<1,5>>>, !fir.slice<1>
+! CHECK:         return
+! CHECK:       }
+
+subroutine array_substring_assignment(a)
+  character(5) :: a(6)
+  a(:)(3:5) = "BAD"
+end subroutine array_substring_assignment
+
+! CHECK-LABEL: func @_QParray_substring_assignment2(
+! CHECK-SAME:        %[[VAL_0:.*]]: !fir.ref<!fir.array<8x!fir.type<_QFarray_substring_assignment2Tt{ch:!fir.char<1,7>}>>>{{.*}}) {
+! CHECK:         %[[VAL_1:.*]] = arith.constant 8 : index
+! CHECK:         %[[VAL_2:.*]] = fir.field_index ch, !fir.type<_QFarray_substring_assignment2Tt{ch:!fir.char<1,7>}>
+! CHECK:         %[[VAL_3:.*]] = fir.shape %[[VAL_1]] : (index) -> !fir.shape<1>
+! CHECK:         %[[VAL_4:.*]] = arith.constant 1 : index
+! CHECK:         %[[VAL_5:.*]] = fir.slice %[[VAL_4]], %[[VAL_1]], %[[VAL_4]] path %[[VAL_2]] : (index, index, index, !fir.field) -> !fir.slice<1>
+! CHECK:         %[[c0:.*]] = arith.constant 0 : index
+! CHECK:         %[[sub:.*]] = arith.subi %[[VAL_1]], %[[VAL_4]] : index
+! CHECK:         %[[add:.*]] = arith.addi %[[sub]], %[[VAL_4]] : index
+! CHECK:         %[[div:.*]] = arith.divsi %4, %[[VAL_4]] : index
+! CHECK:         %[[cmp:.*]] = arith.cmpi sgt, %[[div]], %[[c0]] : index
+! CHECK:         %[[select:.*]] = arith.select %[[cmp]], %[[div]], %[[c0]] : index
+! CHECK:         %[[VAL_6:.*]] = fir.array_load %[[VAL_0]](%[[VAL_3]]) {{\[}}%[[VAL_5]]] : (!fir.ref<!fir.array<8x!fir.type<_QFarray_substring_assignment2Tt{ch:!fir.char<1,7>}>>>, !fir.shape<1>, !fir.slice<1>) -> !fir.array<8x!fir.char<1,7>>
+! CHECK:         %[[VAL_7:.*]] = fir.address_of(@_QQcl.6E696365) : !fir.ref<!fir.char<1,4>>
+! CHECK:         %[[VAL_8:.*]] = arith.constant 4 : index
+! CHECK:         %[[VAL_9:.*]] = arith.constant 1 : index
+! CHECK:         %[[VAL_10:.*]] = arith.constant 0 : index
+! CHECK:         %[[VAL_11:.*]] = arith.subi %[[select]], %[[VAL_9]] : index
+! CHECK:         %[[VAL_12:.*]] = fir.do_loop %[[VAL_13:.*]] = %[[VAL_10]] to %[[VAL_11]] step %[[VAL_9]] unordered iter_args(%[[VAL_14:.*]] = %[[VAL_6]]) -> (!fir.array<8x!fir.char<1,7>>) {
+! CHECK:           %[[VAL_15:.*]] = fir.array_access %[[VAL_14]], %[[VAL_13]] : (!fir.array<8x!fir.char<1,7>>, index) -> !fir.ref<!fir.char<1,7>>
+! CHECK:           %[[VAL_16:.*]] = arith.constant 4 : i64
+! CHECK:           %[[VAL_17:.*]] = arith.constant 7 : i64
+! CHECK:           %[[VAL_18:.*]] = fir.convert %[[VAL_16]] : (i64) -> index
+! CHECK:           %[[VAL_19:.*]] = fir.convert %[[VAL_17]] : (i64) -> index
+! CHECK:           %[[VAL_20:.*]] = arith.constant 1 : index
+! CHECK:           %[[VAL_21:.*]] = arith.subi %[[VAL_18]], %[[VAL_20]] : index
+! CHECK:           %[[VAL_22:.*]] = fir.convert %[[VAL_15]] : (!fir.ref<!fir.char<1,7>>) -> !fir.ref<!fir.array<7x!fir.char<1>>>
+! CHECK:           %[[VAL_23:.*]] = fir.coordinate_of %[[VAL_22]], %[[VAL_21]] : (!fir.ref<!fir.array<7x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+! CHECK:           %[[VAL_24:.*]] = fir.convert %[[VAL_23]] : (!fir.ref<!fir.char<1>>) -> !fir.ref<!fir.char<1,?>>
+! CHECK:           %[[VAL_25:.*]] = arith.subi %[[VAL_19]], %[[VAL_18]] : index
+! CHECK:           %[[VAL_26:.*]] = arith.addi %[[VAL_25]], %[[VAL_20]] : index
+! CHECK:           %[[VAL_27:.*]] = arith.constant 0 : index
+! CHECK:           %[[VAL_28:.*]] = arith.cmpi slt, %[[VAL_26]], %[[VAL_27]] : index
+! CHECK:           %[[VAL_29:.*]] = arith.select %[[VAL_28]], %[[VAL_27]], %[[VAL_26]] : index
+! CHECK:           %[[VAL_30:.*]] = arith.constant 0 : index
+! CHECK:           %[[VAL_31:.*]] = arith.constant 1 : index
+! CHECK:           %[[VAL_32:.*]] = fir.convert %[[VAL_29]] : (index) -> index
+! CHECK:           %[[VAL_33:.*]] = arith.subi %[[VAL_32]], %[[VAL_31]] : index
+! CHECK:           fir.do_loop %[[VAL_34:.*]] = %[[VAL_30]] to %[[VAL_33]] step %[[VAL_31]] {
+! CHECK:             %[[VAL_35:.*]] = fir.convert %[[VAL_8]] : (index) -> index
+! CHECK:             %[[VAL_36:.*]] = arith.cmpi slt, %[[VAL_34]], %[[VAL_35]] : index
+! CHECK:             fir.if %[[VAL_36]] {
+! CHECK:               %[[VAL_37:.*]] = fir.convert %[[VAL_7]] : (!fir.ref<!fir.char<1,4>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+! CHECK:               %[[VAL_38:.*]] = fir.coordinate_of %[[VAL_37]], %[[VAL_34]] : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+! CHECK:               %[[VAL_39:.*]] = fir.load %[[VAL_38]] : !fir.ref<!fir.char<1>>
+! CHECK:               %[[VAL_40:.*]] = fir.convert %[[VAL_24]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+! CHECK:               %[[VAL_41:.*]] = fir.coordinate_of %[[VAL_40]], %[[VAL_34]] : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+! CHECK:               fir.store %[[VAL_39]] to %[[VAL_41]] : !fir.ref<!fir.char<1>>
+! CHECK:             } else {
+! CHECK:               %[[VAL_42:.*]] = fir.string_lit [32 : i8](1) : !fir.char<1>
+! CHECK:               %[[VAL_43:.*]] = fir.convert %[[VAL_24]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+! CHECK:               %[[VAL_44:.*]] = fir.coordinate_of %[[VAL_43]], %[[VAL_34]] : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+! CHECK:               fir.store %[[VAL_42]] to %[[VAL_44]] : !fir.ref<!fir.char<1>>
+! CHECK:             }
+! CHECK:           }
+! CHECK:           %[[VAL_45:.*]] = arith.cmpi slt, %[[VAL_29]], %[[VAL_8]] : index
+! CHECK:           %[[VAL_46:.*]] = arith.select %[[VAL_45]], %[[VAL_29]], %[[VAL_8]] : index
+! CHECK:           %[[VAL_47:.*]] = arith.constant 1 : i64
+! CHECK:           %[[VAL_48:.*]] = fir.convert %[[VAL_46]] : (index) -> i64
+! CHECK:           %[[VAL_49:.*]] = arith.muli %[[VAL_47]], %[[VAL_48]] : i64
+! CHECK:           %[[VAL_50:.*]] = arith.constant false
+! CHECK:           %[[VAL_51:.*]] = fir.convert %[[VAL_24]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+! CHECK:           %[[VAL_52:.*]] = fir.convert %[[VAL_7]] : (!fir.ref<!fir.char<1,4>>) -> !fir.ref<i8>
+! CHECK:           fir.call @llvm.memmove.p0i8.p0i8.i64(%[[VAL_51]], %[[VAL_52]], %[[VAL_49]], %[[VAL_50]]) : (!fir.ref<i8>, !fir.ref<i8>, i64, i1) -> ()
+! CHECK:           %[[VAL_53:.*]] = arith.constant 1 : index
+! CHECK:           %[[VAL_54:.*]] = arith.subi %[[VAL_29]], %[[VAL_53]] : index
+! CHECK:           %[[VAL_55:.*]] = arith.constant 32 : i8
+! CHECK:           %[[VAL_56:.*]] = fir.undefined !fir.char<1>
+! CHECK:           %[[VAL_57:.*]] = fir.insert_value %[[VAL_56]], %[[VAL_55]], [0 : index] : (!fir.char<1>, i8) -> !fir.char<1>
+! CHECK:           %[[VAL_58:.*]] = arith.constant 1 : index
+! CHECK:           fir.do_loop %[[VAL_59:.*]] = %[[VAL_46]] to %[[VAL_54]] step %[[VAL_58]] {
+! CHECK:             %[[VAL_60:.*]] = fir.convert %[[VAL_24]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+! CHECK:             %[[VAL_61:.*]] = fir.coordinate_of %[[VAL_60]], %[[VAL_59]] : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+! CHECK:             fir.store %[[VAL_57]] to %[[VAL_61]] : !fir.ref<!fir.char<1>>
+! CHECK:           }
+! CHECK:           %[[VAL_62:.*]] = fir.array_amend %[[VAL_14]], %[[VAL_15]] : (!fir.array<8x!fir.char<1,7>>, !fir.ref<!fir.char<1,7>>) -> !fir.array<8x!fir.char<1,7>>
+! CHECK:           fir.result %[[VAL_62]] : !fir.array<8x!fir.char<1,7>>
+! CHECK:         }
+! CHECK:         fir.array_merge_store %[[VAL_6]], %[[VAL_63:.*]] to %[[VAL_0]]{{\[}}%[[VAL_5]]] : !fir.array<8x!fir.char<1,7>>, !fir.array<8x!fir.char<1,7>>, !fir.ref<!fir.array<8x!fir.type<_QFarray_substring_assignment2Tt{ch:!fir.char<1,7>}>>>, !fir.slice<1>
+! CHECK:         return
+! CHECK:       }
+
+subroutine array_substring_assignment2(a)
+  type t
+     character(7) :: ch
+  end type t
+  type(t) :: a(8)
+  a%ch(4:7) = "nice"
+end subroutine array_substring_assignment2
+
+! CHECK-LABEL: func @_QParray_substring_assignment3(
+! CHECK-SAME:     %[[VAL_0:.*]]: !fir.ref<!fir.array<8x!fir.type<_QFarray_substring_assignment3Tt{ch:!fir.char<1,7>}>>>{{.*}}, %[[VAL_1:.*]]: !fir.ref<!fir.array<8x!fir.type<_QFarray_substring_assignment3Tt{ch:!fir.char<1,7>}>>>{{.*}}) {
+! CHECK:         %[[VAL_2:.*]] = arith.constant 8 : index
+! CHECK:         %[[VAL_3:.*]] = arith.constant 8 : index
+! CHECK:         %[[VAL_4:.*]] = fir.field_index ch, !fir.type<_QFarray_substring_assignment3Tt{ch:!fir.char<1,7>}>
+! CHECK:         %[[VAL_5:.*]] = fir.shape %[[VAL_2]] : (index) -> !fir.shape<1>
+! CHECK:         %[[VAL_6:.*]] = arith.constant 1 : index
+! CHECK:         %[[VAL_7:.*]] = fir.slice %[[VAL_6]], %[[VAL_2]], %[[VAL_6]] path %[[VAL_4]] : (index, index, index, !fir.field) -> !fir.slice<1>
+! CHECK:         %[[c0:.*]] = arith.constant 0 : index
+! CHECK:         %[[sub:.*]] = arith.subi %[[VAL_2]], %[[VAL_6]] : index
+! CHECK:         %[[add:.*]] = arith.addi %[[sub]], %[[VAL_6]] : index
+! CHECK:         %[[div:.*]] = arith.divsi %4, %[[VAL_6]] : index
+! CHECK:         %[[cmp:.*]] = arith.cmpi sgt, %[[div]], %[[c0]] : index
+! CHECK:         %[[select:.*]] = arith.select %[[cmp]], %[[div]], %[[c0]] : index
+! CHECK:         %[[VAL_8:.*]] = fir.array_load %[[VAL_0]](%[[VAL_5]]) {{\[}}%[[VAL_7]]] : (!fir.ref<!fir.array<8x!fir.type<_QFarray_substring_assignment3Tt{ch:!fir.char<1,7>}>>>, !fir.shape<1>, !fir.slice<1>) -> !fir.array<8x!fir.char<1,7>>
+! CHECK:         %[[VAL_9:.*]] = fir.field_index ch, !fir.type<_QFarray_substring_assignment3Tt{ch:!fir.char<1,7>}>
+! CHECK:         %[[VAL_10:.*]] = fir.shape %[[VAL_3]] : (index) -> !fir.shape<1>
+! CHECK:         %[[VAL_11:.*]] = arith.constant 1 : index
+! CHECK:         %[[VAL_12:.*]] = fir.slice %[[VAL_11]], %[[VAL_3]], %[[VAL_11]] path %[[VAL_9]] : (index, index, index, !fir.field) -> !fir.slice<1>
+! CHECK:         %[[VAL_13:.*]] = fir.array_load %[[VAL_1]](%[[VAL_10]]) {{\[}}%[[VAL_12]]] : (!fir.ref<!fir.array<8x!fir.type<_QFarray_substring_assignment3Tt{ch:!fir.char<1,7>}>>>, !fir.shape<1>, !fir.slice<1>) -> !fir.array<8x!fir.char<1,7>>
+! CHECK:         %[[VAL_14:.*]] = arith.constant 1 : index
+! CHECK:         %[[VAL_15:.*]] = arith.constant 0 : index
+! CHECK:         %[[VAL_16:.*]] = arith.subi %[[select]], %[[VAL_14]] : index
+! CHECK:         %[[VAL_17:.*]] = fir.do_loop %[[VAL_18:.*]] = %[[VAL_15]] to %[[VAL_16]] step %[[VAL_14]] unordered iter_args(%[[VAL_19:.*]] = %[[VAL_8]]) -> (!fir.array<8x!fir.char<1,7>>) {
+! CHECK:           %[[VAL_20:.*]] = fir.array_access %[[VAL_13]], %[[VAL_18]] : (!fir.array<8x!fir.char<1,7>>, index) -> !fir.ref<!fir.char<1,7>>
+! CHECK:           %[[VAL_21:.*]] = arith.constant 2 : i64
+! CHECK:           %[[VAL_22:.*]] = arith.constant 5 : i64
+! CHECK:           %[[VAL_23:.*]] = fir.convert %[[VAL_21]] : (i64) -> index
+! CHECK:           %[[VAL_24:.*]] = fir.convert %[[VAL_22]] : (i64) -> index
+! CHECK:           %[[VAL_25:.*]] = arith.constant 1 : index
+! CHECK:           %[[VAL_26:.*]] = arith.subi %[[VAL_23]], %[[VAL_25]] : index
+! CHECK:           %[[VAL_27:.*]] = fir.convert %[[VAL_20]] : (!fir.ref<!fir.char<1,7>>) -> !fir.ref<!fir.array<7x!fir.char<1>>>
+! CHECK:           %[[VAL_28:.*]] = fir.coordinate_of %[[VAL_27]], %[[VAL_26]] : (!fir.ref<!fir.array<7x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+! CHECK:           %[[VAL_29:.*]] = fir.convert %[[VAL_28]] : (!fir.ref<!fir.char<1>>) -> !fir.ref<!fir.char<1,?>>
+! CHECK:           %[[VAL_30:.*]] = arith.subi %[[VAL_24]], %[[VAL_23]] : index
+! CHECK:           %[[VAL_31:.*]] = arith.addi %[[VAL_30]], %[[VAL_25]] : index
+! CHECK:           %[[VAL_32:.*]] = arith.constant 0 : index
+! CHECK:           %[[VAL_33:.*]] = arith.cmpi slt, %[[VAL_31]], %[[VAL_32]] : index
+! CHECK:           %[[VAL_34:.*]] = arith.select %[[VAL_33]], %[[VAL_32]], %[[VAL_31]] : index
+! CHECK:           %[[VAL_35:.*]] = fir.array_access %[[VAL_19]], %[[VAL_18]] : (!fir.array<8x!fir.char<1,7>>, index) -> !fir.ref<!fir.char<1,7>>
+! CHECK:           %[[VAL_36:.*]] = arith.constant 4 : i64
+! CHECK:           %[[VAL_37:.*]] = arith.constant 7 : i64
+! CHECK:           %[[VAL_38:.*]] = fir.convert %[[VAL_36]] : (i64) -> index
+! CHECK:           %[[VAL_39:.*]] = fir.convert %[[VAL_37]] : (i64) -> index
+! CHECK:           %[[VAL_40:.*]] = arith.constant 1 : index
+! CHECK:           %[[VAL_41:.*]] = arith.subi %[[VAL_38]], %[[VAL_40]] : index
+! CHECK:           %[[VAL_42:.*]] = fir.convert %[[VAL_35]] : (!fir.ref<!fir.char<1,7>>) -> !fir.ref<!fir.array<7x!fir.char<1>>>
+! CHECK:           %[[VAL_43:.*]] = fir.coordinate_of %[[VAL_42]], %[[VAL_41]] : (!fir.ref<!fir.array<7x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+! CHECK:           %[[VAL_44:.*]] = fir.convert %[[VAL_43]] : (!fir.ref<!fir.char<1>>) -> !fir.ref<!fir.char<1,?>>
+! CHECK:           %[[VAL_45:.*]] = arith.subi %[[VAL_39]], %[[VAL_38]] : index
+! CHECK:           %[[VAL_46:.*]] = arith.addi %[[VAL_45]], %[[VAL_40]] : index
+! CHECK:           %[[VAL_47:.*]] = arith.constant 0 : index
+! CHECK:           %[[VAL_48:.*]] = arith.cmpi slt, %[[VAL_46]], %[[VAL_47]] : index
+! CHECK:           %[[VAL_49:.*]] = arith.select %[[VAL_48]], %[[VAL_47]], %[[VAL_46]] : index
+! CHECK:           %[[VAL_50:.*]] = arith.constant 0 : index
+! CHECK:           %[[VAL_51:.*]] = arith.constant 1 : index
+! CHECK:           %[[VAL_52:.*]] = fir.convert %[[VAL_49]] : (index) -> index
+! CHECK:           %[[VAL_53:.*]] = arith.subi %[[VAL_52]], %[[VAL_51]] : index
+! CHECK:           fir.do_loop %[[VAL_54:.*]] = %[[VAL_50]] to %[[VAL_53]] step %[[VAL_51]] {
+! CHECK:             %[[VAL_55:.*]] = fir.convert %[[VAL_34]] : (index) -> index
+! CHECK:             %[[VAL_56:.*]] = arith.cmpi slt, %[[VAL_54]], %[[VAL_55]] : index
+! CHECK:             fir.if %[[VAL_56]] {
+! CHECK:               %[[VAL_57:.*]] = fir.convert %[[VAL_29]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+! CHECK:               %[[VAL_58:.*]] = fir.coordinate_of %[[VAL_57]], %[[VAL_54]] : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+! CHECK:               %[[VAL_59:.*]] = fir.load %[[VAL_58]] : !fir.ref<!fir.char<1>>
+! CHECK:               %[[VAL_60:.*]] = fir.convert %[[VAL_44]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+! CHECK:               %[[VAL_61:.*]] = fir.coordinate_of %[[VAL_60]], %[[VAL_54]] : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+! CHECK:               fir.store %[[VAL_59]] to %[[VAL_61]] : !fir.ref<!fir.char<1>>
+! CHECK:             } else {
+! CHECK:               %[[VAL_62:.*]] = fir.string_lit [32 : i8](1) : !fir.char<1>
+! CHECK:               %[[VAL_63:.*]] = fir.convert %[[VAL_44]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+! CHECK:               %[[VAL_64:.*]] = fir.coordinate_of %[[VAL_63]], %[[VAL_54]] : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+! CHECK:               fir.store %[[VAL_62]] to %[[VAL_64]] : !fir.ref<!fir.char<1>>
+! CHECK:             }
+! CHECK:           }
+! CHECK:           %[[VAL_65:.*]] = arith.cmpi slt, %[[VAL_49]], %[[VAL_34]] : index
+! CHECK:           %[[VAL_66:.*]] = arith.select %[[VAL_65]], %[[VAL_49]], %[[VAL_34]] : index
+! CHECK:           %[[VAL_67:.*]] = arith.constant 1 : i64
+! CHECK:           %[[VAL_68:.*]] = fir.convert %[[VAL_66]] : (index) -> i64
+! CHECK:           %[[VAL_69:.*]] = arith.muli %[[VAL_67]], %[[VAL_68]] : i64
+! CHECK:           %[[VAL_70:.*]] = arith.constant false
+! CHECK:           %[[VAL_71:.*]] = fir.convert %[[VAL_44]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+! CHECK:           %[[VAL_72:.*]] = fir.convert %[[VAL_29]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<i8>
+! CHECK:           fir.call @llvm.memmove.p0i8.p0i8.i64(%[[VAL_71]], %[[VAL_72]], %[[VAL_69]], %[[VAL_70]]) : (!fir.ref<i8>, !fir.ref<i8>, i64, i1) -> ()
+! CHECK:           %[[VAL_73:.*]] = arith.constant 1 : index
+! CHECK:           %[[VAL_74:.*]] = arith.subi %[[VAL_49]], %[[VAL_73]] : index
+! CHECK:           %[[VAL_75:.*]] = arith.constant 32 : i8
+! CHECK:           %[[VAL_76:.*]] = fir.undefined !fir.char<1>
+! CHECK:           %[[VAL_77:.*]] = fir.insert_value %[[VAL_76]], %[[VAL_75]], [0 : index] : (!fir.char<1>, i8) -> !fir.char<1>
+! CHECK:           %[[VAL_78:.*]] = arith.constant 1 : index
+! CHECK:           fir.do_loop %[[VAL_79:.*]] = %[[VAL_66]] to %[[VAL_74]] step %[[VAL_78]] {
+! CHECK:             %[[VAL_80:.*]] = fir.convert %[[VAL_44]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ref<!fir.array<?x!fir.char<1>>>
+! CHECK:             %[[VAL_81:.*]] = fir.coordinate_of %[[VAL_80]], %[[VAL_79]] : (!fir.ref<!fir.array<?x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
+! CHECK:             fir.store %[[VAL_77]] to %[[VAL_81]] : !fir.ref<!fir.char<1>>
+! CHECK:           }
+! CHECK:           %[[VAL_82:.*]] = fir.array_amend %[[VAL_19]], %[[VAL_35]] : (!fir.array<8x!fir.char<1,7>>, !fir.ref<!fir.char<1,7>>) -> !fir.array<8x!fir.char<1,7>>
+! CHECK:           fir.result %[[VAL_82]] : !fir.array<8x!fir.char<1,7>>
+! CHECK:         }
+! CHECK:         fir.array_merge_store %[[VAL_8]], %[[VAL_83:.*]] to %[[VAL_0]]{{\[}}%[[VAL_7]]] : !fir.array<8x!fir.char<1,7>>, !fir.array<8x!fir.char<1,7>>, !fir.ref<!fir.array<8x!fir.type<_QFarray_substring_assignment3Tt{ch:!fir.char<1,7>}>>>, !fir.slice<1>
+! CHECK:         return
+! CHECK:       }
+
+
+subroutine array_substring_assignment3(a,b)
+  type t
+     character(7) :: ch
+  end type t
+  type(t) :: a(8), b(8)
+  a%ch(4:7) = b%ch(2:5)
+end subroutine array_substring_assignment3