flang/test/Lower/HLFIR/maxval.f90

   1 ! Test lowering of MAXVAL intrinsic to HLFIR
   2 ! RUN: bbc -emit-hlfir -o - %s 2>&1 | FileCheck %s
   3
   4 ! simple 1 argument MAXVAL
   5 subroutine maxval1(a, s)
   6   integer :: a(:), s
   7   s = MAXVAL(a)
   8 end subroutine
   9 ! CHECK-LABEL: func.func @_QPmaxval1(
  10 ! CHECK:           %[[ARG0:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "a"}, %[[ARG1:.*]]: !fir.ref<i32>
  11 ! CHECK-DAG:     %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
  12 ! CHECK-DAG:     %[[OUT:.*]]:2 = hlfir.declare %[[ARG1]]
  13 ! CHECK-NEXT:    %[[EXPR:.*]] = hlfir.maxval %[[ARRAY]]#0 {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?xi32>>) -> i32
  14 ! CHECK-NEXT:    hlfir.assign %[[EXPR]] to %[[OUT]]#0 : i32, !fir.ref<i32>
  15 ! CHECK-NEXT:    return
  16 ! CHECK-NEXT:  }
  17
  18 ! maxval with by-ref DIM argument
  19 subroutine maxval2(a, s, d)
  20   integer :: a(:,:), s(:), d
  21   s = MAXVAL(a, d)
  22 end subroutine
  23 ! CHECK-LABEL: func.func @_QPmaxval2(
  24 ! CHECK:           %[[ARG0:.*]]: !fir.box<!fir.array<?x?xi32>> {fir.bindc_name = "a"}, %[[ARG1:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "s"}, %[[ARG2:.*]]: !fir.ref<i32>
  25 ! CHECK-DAG:     %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
  26 ! CHECK-DAG:     %[[OUT:.*]]:2 = hlfir.declare %[[ARG1]]
  27 ! CHECK-DAG:     %[[DIM_REF:.*]]:2 = hlfir.declare %[[ARG2]]
  28 ! CHECK-NEXT:    %[[DIM:.*]] = fir.load %[[DIM_REF]]#0 : !fir.ref<i32>
  29 ! CHECK-NEXT:    %[[EXPR:.*]] = hlfir.maxval %[[ARRAY]]#0 dim %[[DIM]] {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?x?xi32>>, i32) -> !hlfir.expr<?xi32>
  30 ! CHECK-NEXT:    hlfir.assign %[[EXPR]] to %[[OUT]]#0 : !hlfir.expr<?xi32>, !fir.box<!fir.array<?xi32>>
  31 ! CHECK-NEXT:    hlfir.destroy %[[EXPR]]
  32 ! CHECK-NEXT:    return
  33 ! CHECK-NEXT:  }
  34
  35 ! maxval with scalar mask argument
  36 subroutine maxval3(a, s, m)
  37   integer :: a(:), s
  38   logical :: m
  39   s = MAXVAL(a, m)
  40 end subroutine
  41 ! CHECK-LABEL: func.func @_QPmaxval3(
  42 ! CHECK:           %[[ARG0:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "a"}, %[[ARG1:.*]]: !fir.ref<i32> {fir.bindc_name = "s"}, %[[ARG2:.*]]: !fir.ref<!fir.logical<4>>
  43 ! CHECK-DAG:     %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
  44 ! CHECK-DAG:     %[[OUT:.*]]:2 = hlfir.declare %[[ARG1]]
  45 ! CHECK-DAG:     %[[MASK:.*]]:2 = hlfir.declare %[[ARG2]]
  46 ! CHECK-NEXT:    %[[EXPR:.*]] = hlfir.maxval %[[ARRAY]]#0 mask %[[MASK]]#0 {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?xi32>>, !fir.ref<!fir.logical<4>>) -> i32
  47 ! CHECK-NEXT:    hlfir.assign %[[EXPR]] to %[[OUT]]#0 : i32, !fir.ref<i32>
  48 ! CHECK-NEXT:    return
  49 ! CHECK-NEXT:  }
  50
  51 ! maxval with array mask argument
  52 subroutine maxval4(a, s, m)
  53   integer :: a(:), s
  54   logical :: m(:)
  55   s = MAXVAL(a, m)
  56 end subroutine
  57 ! CHECK-LABEL: func.func @_QPmaxval4(
  58 ! CHECK:           %[[ARG0:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "a"}, %[[ARG1:.*]]: !fir.ref<i32> {fir.bindc_name = "s"}, %[[ARG2:.*]]: !fir.box<!fir.array<?x!fir.logical<4>>>
  59 ! CHECK-DAG:     %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
  60 ! CHECK-DAG:     %[[OUT:.*]]:2 = hlfir.declare %[[ARG1]]
  61 ! CHECK-DAG:     %[[MASK:.*]]:2 = hlfir.declare %[[ARG2]]
  62 ! CHECK-NEXT:    %[[EXPR:.*]] = hlfir.maxval %[[ARRAY]]#0 mask %[[MASK]]#0 {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.array<?x!fir.logical<4>>>) -> i32
  63 ! CHECK-NEXT:    hlfir.assign %[[EXPR]] to %[[OUT]]#0 : i32, !fir.ref<i32>
  64 ! CHECK-NEXT:    return
  65 ! CHECK-NEXT:  }
  66
  67 ! maxval with all 3 arguments, dim is by-val, array isn't boxed
  68 subroutine maxval5(s)
  69   integer :: s(2)
  70   integer :: a(2,2) = reshape((/1, 2, 3, 4/), [2,2])
  71   s = maxval(a, 1, .true.)
  72 end subroutine
  73 ! CHECK-LABEL: func.func @_QPmaxval5
  74 ! CHECK:           %[[ARG0:.*]]: !fir.ref<!fir.array<2xi32>>
  75 ! CHECK-DAG:     %[[ADDR:.*]] = fir.address_of({{.*}}) : !fir.ref<!fir.array<2x2xi32>>
  76 ! CHECK-DAG:     %[[ARRAY_SHAPE:.*]] = fir.shape {{.*}} -> !fir.shape<2>
  77 ! CHECK-DAG:     %[[ARRAY:.*]]:2 = hlfir.declare %[[ADDR]](%[[ARRAY_SHAPE]])
  78 ! CHECK-DAG:     %[[OUT_SHAPE:.*]] = fir.shape {{.*}} -> !fir.shape<1>
  79 ! CHECK-DAG:     %[[OUT:.*]]:2 = hlfir.declare %[[ARG0]](%[[OUT_SHAPE]])
  80 ! CHECK-DAG:     %[[TRUE:.*]] = arith.constant true
  81 ! CHECK-DAG:     %[[C1:.*]] = arith.constant 1 : i32
  82 ! CHECK-NEXT:    %[[EXPR:.*]] = hlfir.maxval %[[ARRAY]]#0 dim %[[C1]] mask %[[TRUE]] {fastmath = #arith.fastmath<contract>} : (!fir.ref<!fir.array<2x2xi32>>, i32, i1) -> !hlfir.expr<2xi32>
  83 ! CHECK-NEXT:    hlfir.assign %[[EXPR]] to %[[OUT]]#0 : !hlfir.expr<2xi32>, !fir.ref<!fir.array<2xi32>>
  84 ! CHECK-NEXT:    hlfir.destroy %[[EXPR]] : !hlfir.expr<2xi32>
  85 ! CHECK-NEXT:    return
  86 ! CHECK-nEXT:  }
  87
  88 subroutine maxval6(a, s, d)
  89   integer, pointer :: d
  90   real :: a(:,:), s(:)
  91   s = maxval(a, (d))
  92 end subroutine
  93 ! CHECK-LABEL: func.func @_QPmaxval6(
  94 ! CHECK:           %[[ARG0:.*]]: !fir.box<!fir.array<?x?xf32>>
  95 ! CHECK:           %[[ARG1:.*]]: !fir.box<!fir.array<?xf32>>
  96 ! CHECK:           %[[ARG2:.*]]: !fir.ref<!fir.box<!fir.ptr<i32>>>
  97 ! CHECK-DAG:     %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
  98 ! CHECK-DAG:     %[[OUT:.*]]:2 = hlfir.declare %[[ARG1]]
  99 ! CHECK-DAG:     %[[DIM_VAR:.*]]:2 = hlfir.declare %[[ARG2]]
 100 ! CHECK-NEXT:     %[[DIM_BOX:.*]] = fir.load %[[DIM_VAR]]#0 : !fir.ref<!fir.box<!fir.ptr<i32>>>
 101 ! CHECK-NEXT:    %[[DIM_ADDR:.*]] = fir.box_addr %[[DIM_BOX]] : (!fir.box<!fir.ptr<i32>>) -> !fir.ptr<i32>
 102 ! CHECK-NEXT:    %[[DIM0:.*]] = fir.load %[[DIM_ADDR]] : !fir.ptr<i32>
 103 ! CHECK-NEXT:    %[[DIM1:.*]] = hlfir.no_reassoc %[[DIM0]] : i32
 104 ! CHECK-NEXT:    %[[EXPR:.*]] = hlfir.maxval %[[ARRAY]]#0 dim %[[DIM1]] {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?x?xf32>>, i32) -> !hlfir.expr<?xf32>
 105 ! CHECK-NEXT:    hlfir.assign %[[EXPR]] to %[[OUT]]#0 : !hlfir.expr<?xf32>, !fir.box<!fir.array<?xf32>>
 106 ! CHECK-NEXT:    hlfir.destroy %[[EXPR]]
 107 ! CHECK-NEXT:    return
 108 ! CHECK-NEXT:  }
 109
 110 ! simple 1 argument MAXVAL for character
 111 subroutine maxval7(a, s)
 112   character(*) :: a(:), s
 113   s = MAXVAL(a)
 114 end subroutine
 115 ! CHECK-LABEL: func.func @_QPmaxval7(
 116 ! CHECK:           %[[ARG0:.*]]: !fir.box<!fir.array<?x!fir.char<1,?>>> {fir.bindc_name = "a"}, %[[ARG1:.*]]: !fir.boxchar<1>
 117 ! CHECK-DAG:     %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
 118 ! CHECK-DAG:     %[[UNBOXED:.*]]:2 = fir.unboxchar %[[ARG1]]
 119 ! CHECK-DAG:     %[[OUT:.*]]:2 = hlfir.declare %[[UNBOXED]]#0 typeparams %[[UNBOXED]]#1
 120 ! CHECK-NEXT:    %[[EXPR:.*]] = hlfir.maxval %[[ARRAY]]#0 {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?x!fir.char<1,?>>>) -> !hlfir.expr<!fir.char<1,?>>
 121 ! CHECK-NEXT:    hlfir.assign %[[EXPR]] to %[[OUT]]#0 : !hlfir.expr<!fir.char<1,?>>, !fir.boxchar<1>
 122 ! CHECK-NEXT:    hlfir.destroy %[[EXPR]]
 123 ! CHECK-NEXT:    return
 124 ! CHECK-NEXT:  }
 125
 126 ! maxval for character with by-ref DIM argument
 127 subroutine maxval8(a, s, d)
 128   character(*) :: a(:,:), s(:)
 129   integer :: d
 130   s = MAXVAL(a, d)
 131 end subroutine
 132 ! CHECK-LABEL: func.func @_QPmaxval8(
 133 ! CHECK:           %[[ARG0:.*]]: !fir.box<!fir.array<?x?x!fir.char<1,?>>> {fir.bindc_name = "a"}, %[[ARG1:.*]]: !fir.box<!fir.array<?x!fir.char<1,?>>> {fir.bindc_name = "s"}, %[[ARG2:.*]]: !fir.ref<i32>
 134 ! CHECK-DAG:     %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
 135 ! CHECK-DAG:     %[[OUT:.*]]:2 = hlfir.declare %[[ARG1]]
 136 ! CHECK-DAG:     %[[DIM_REF:.*]]:2 = hlfir.declare %[[ARG2]]
 137 ! CHECK-NEXT:    %[[DIM:.*]] = fir.load %[[DIM_REF]]#0 : !fir.ref<i32>
 138 ! CHECK-NEXT:    %[[EXPR:.*]] = hlfir.maxval %[[ARRAY]]#0 dim %[[DIM]] {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?x?x!fir.char<1,?>>>, i32) -> !hlfir.expr<?x!fir.char<1,?>>
 139 ! CHECK-NEXT:    hlfir.assign %[[EXPR]] to %[[OUT]]#0 : !hlfir.expr<?x!fir.char<1,?>>, !fir.box<!fir.array<?x!fir.char<1,?>>>
 140 ! CHECK-NEXT:    hlfir.destroy %[[EXPR]]
 141 ! CHECK-NEXT:    return
 142 ! CHECK-NEXT:  }
 143
 144 ! maxval for character with scalar mask argument
 145 subroutine maxval9(a, s, m)
 146   character(*) :: a(:), s
 147   logical :: m
 148   s = MAXVAL(a, m)
 149 end subroutine
 150 ! CHECK-LABEL: func.func @_QPmaxval9(
 151 ! CHECK:           %[[ARG0:.*]]: !fir.box<!fir.array<?x!fir.char<1,?>>> {fir.bindc_name = "a"}, %[[ARG1:.*]]: !fir.boxchar<1> {fir.bindc_name = "s"}, %[[ARG2:.*]]: !fir.ref<!fir.logical<4>>
 152 ! CHECK-DAG:     %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
 153 ! CHECK-DAG:     %[[UNBOXED:.*]]:2 = fir.unboxchar %[[ARG1]]
 154 ! CHECK-DAG:     %[[MASK:.*]]:2 = hlfir.declare %[[ARG2]]
 155 ! CHECK-DAG:     %[[OUT:.*]]:2 = hlfir.declare %[[UNBOXED]]#0 typeparams %[[UNBOXED]]#1
 156 ! CHECK-NEXT:    %[[EXPR:.*]] = hlfir.maxval %[[ARRAY]]#0 mask %[[MASK]]#0 {fastmath = #arith.fastmath<contract>} : (!fir.box<!fir.array<?x!fir.char<1,?>>>, !fir.ref<!fir.logical<4>>) -> !hlfir.expr<!fir.char<1,?>>
 157 ! CHECK-NEXT:    hlfir.assign %[[EXPR]] to %[[OUT]]#0 : !hlfir.expr<!fir.char<1,?>>, !fir.boxchar<1>
 158 ! CHECK-NEXT:    hlfir.destroy %[[EXPR]]
 159 ! CHECK-NEXT:    return
 160 ! CHECK-NEXT:  }
 161
 162 subroutine testDynamicallyOptionalMask(array, mask, res)
 163   integer :: array(:), res
 164   logical, allocatable :: mask(:)
 165   res = MAXVAL(array, mask=mask)
 166 end subroutine
 167 ! CHECK-LABEL: func.func @_QPtestdynamicallyoptionalmask(
 168 ! CHECK-SAME:      %[[ARG0:.*]]: !fir.box<!fir.array<?xi32>>
 169 ! CHECK-SAME:      %[[ARG1:.*]]: !fir.ref<!fir.box<!fir.heap<!fir.array<?x!fir.logical<4>>>>>
 170 ! CHECK-SAME:      %[[ARG2:.*]]: !fir.ref<i32>
 171 ! CHECK-DAG:     %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
 172 ! CHECK-DAG:     %[[MASK:.*]]:2 = hlfir.declare %[[ARG1]]
 173 ! CHECK-DAG:     %[[RES:.*]]:2 = hlfir.declare %[[ARG2]]
 174 ! CHECK-NEXT:    %[[MASK_LOAD:.*]] = fir.load %[[MASK]]#1
 175 ! CHECK-NEXT:    %[[MASK_ADDR:.*]] = fir.box_addr %[[MASK_LOAD]]
 176 ! CHECK-NEXT:    %[[MASK_ADDR_INT:.*]] = fir.convert %[[MASK_ADDR]]
 177 ! CHECK-NEXT:    %[[C0:.*]] = arith.constant 0 : i64
 178 ! CHECK-NEXT:    %[[CMP:.*]] = arith.cmpi ne, %[[MASK_ADDR_INT]], %[[C0]] : i64
 179 ! it is a shame there is a second load here. The first is generated for
 180 ! PreparedActualArgument::isPresent, the second is for optional handling
 181 ! CHECK-NEXT:    %[[MASK_LOAD2:.*]] = fir.load %[[MASK]]#1
 182 ! CHECK-NEXT:    %[[ABSENT:.*]] = fir.absent !fir.box<!fir.heap<!fir.array<?x!fir.logical<4>>>>
 183 ! CHECK-NEXT:    %[[SELECT:.*]] = arith.select %[[CMP]], %[[MASK_LOAD2]], %[[ABSENT]]
 184 ! CHECK-NEXT:    %[[MAXVAL:.*]] = hlfir.maxval %[[ARRAY]]#0 mask %[[SELECT]]
 185 ! CHECK-NEXT:    hlfir.assign %[[MAXVAL]] to %[[RES]]#0
 186 ! CHECK-NEXT:    return
 187 ! CHECK-NEXT:  }
 188
 189 subroutine testAllocatableArray(array, mask, res)
 190   integer, allocatable :: array(:)
 191   integer :: res
 192   logical :: mask(:)
 193   res = MAXVAL(array, mask=mask)
 194 end subroutine
 195 ! CHECK-LABEL: func.func @_QPtestallocatablearray(
 196 ! CHECK-SAME:      %[[ARG0:.*]]: !fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>
 197 ! CHECK-SAME:      %[[ARG1:.*]]: !fir.box<!fir.array<?x!fir.logical<4>>>
 198 ! CHECK-SAME:      %[[ARG2:.*]]: !fir.ref<i32>
 199 ! CHECK-DAG:     %[[ARRAY:.*]]:2 = hlfir.declare %[[ARG0]]
 200 ! CHECK-DAG:     %[[MASK:.*]]:2 = hlfir.declare %[[ARG1]]
 201 ! CHECK-DAG:     %[[RES:.*]]:2 = hlfir.declare %[[ARG2]]
 202 ! CHECK-NEXT:    %[[LOADED_ARRAY:.*]] = fir.load %[[ARRAY]]#0
 203 ! CHECK-NEXT:    %[[MAXVAL:.*]] = hlfir.maxval %[[LOADED_ARRAY]] mask %[[MASK]]#0
 204 ! CHECK-NEXT:    hlfir.assign %[[MAXVAL]] to %[[RES]]#0
 205 ! CHECK-NEXT:    return
 206 ! CHECK-NEXT:  }
 207
 208 function testOptionalScalar(array, mask)
 209   integer :: array(:)
 210   logical, optional :: mask
 211   integer :: testOptionalScalar
 212   testOptionalScalar = maxval(array, mask)
 213 end function
 214 ! CHECK-LABEL:   func.func @_QPtestoptionalscalar(
 215 ! CHECK-SAME:                                     %[[ARRAY_ARG:.*]]: !fir.box<!fir.array<?xi32>> {fir.bindc_name = "array"},
 216 ! CHECK-SAME:                                     %[[MASK_ARG:.*]]: !fir.ref<!fir.logical<4>> {fir.bindc_name = "mask", fir.optional}) -> i32
 217 ! CHECK:           %[[ARRAY_VAR:.*]]:2 = hlfir.declare %[[ARRAY_ARG]]
 218 ! CHECK:           %[[MASK_VAR:.*]]:2 = hlfir.declare %[[MASK_ARG]]
 219 ! CHECK:           %[[RET_ALLOC:.*]] = fir.alloca i32 {bindc_name = "testoptionalscalar", uniq_name = "_QFtestoptionalscalarEtestoptionalscalar"}
 220 ! CHECK:           %[[RET_VAR:.*]]:2 = hlfir.declare %[[RET_ALLOC]]
 221 ! CHECK:           %[[MASK_IS_PRESENT:.*]] = fir.is_present %[[MASK_VAR]]#0 : (!fir.ref<!fir.logical<4>>) -> i1
 222 ! CHECK:           %[[MASK_BOX:.*]] = fir.embox %[[MASK_VAR]]#1
 223 ! CHECK:           %[[ABSENT:.*]] = fir.absent !fir.box<!fir.logical<4>>
 224 ! CHECK:           %[[MASK_SELECT:.*]] = arith.select %[[MASK_IS_PRESENT]], %[[MASK_BOX]], %[[ABSENT]]
 225 ! CHECK:           %[[RES:.*]] = hlfir.maxval %[[ARRAY_VAR]]#0 mask %[[MASK_SELECT]] {{.*}}: (!fir.box<!fir.array<?xi32>>, !fir.box<!fir.logical<4>>) -> i32
 226 ! CHECK:           hlfir.assign %[[RES]] to %[[RET_VAR]]#0
 227 ! CHECK:           %[[RET:.*]] = fir.load %[[RET_VAR]]#1 : !fir.ref<i32>
 228 ! CHECK:           return %[[RET]] : i32
 229 ! CHECK:         }
 230
 231 ! Test that hlfir.maxval lowering inherits constant
 232 ! character length from the argument, when the length
 233 ! is unknown from the Fortran::evaluate expression type.
 234 subroutine test_unknown_char_len_result
 235   character(len=3) :: array(3,3), res
 236   res = maxval(array(:,:)(:))
 237 end subroutine test_unknown_char_len_result
 238 ! CHECK-LABEL:   func.func @_QPtest_unknown_char_len_result() {
 239 ! CHECK-DAG:       %[[C3:.*]] = arith.constant 3 : index
 240 ! CHECK-DAG:       %[[C3_0:.*]] = arith.constant 3 : index
 241 ! CHECK-DAG:       %[[C3_1:.*]] = arith.constant 3 : index
 242 ! CHECK-DAG:       %[[ARRAY_ALLOC:.*]] = fir.alloca !fir.array<3x3x!fir.char<1,3>>
 243 ! CHECK-DAG:       %[[ARRAY_SHAPE:.*]] = fir.shape %[[C3_0]], %[[C3_1]] : (index, index) -> !fir.shape<2>
 244 ! CHECK-DAG:       %[[ARRAY:.*]]:2 = hlfir.declare %[[ARRAY_ALLOC]](%[[ARRAY_SHAPE]]) typeparams %[[C3]]
 245 ! CHECK-DAG:       %[[C3_2:.*]] = arith.constant 3 : index
 246 ! CHECK-DAG:       %[[RES_ALLOC:.*]] = fir.alloca !fir.char<1,3>
 247 ! CHECK-DAG:       %[[RES:.*]]:2 = hlfir.declare %[[RES_ALLOC]] typeparams %[[C3_2]]
 248 ! CHECK-DAG:       %[[C1:.*]] = arith.constant 1 : index
 249 ! CHECK-DAG:       %[[C1_3:.*]] = arith.constant 1 : index
 250 ! CHECK-DAG:       %[[C3_4:.*]] = arith.constant 3 : index
 251 ! CHECK-DAG:       %[[C1_5:.*]] = arith.constant 1 : index
 252 ! CHECK-DAG:       %[[C3_6:.*]] = arith.constant 3 : index
 253 ! CHECK-DAG:       %[[SHAPE:.*]] = fir.shape %[[C3_4]], %[[C3_6]] : (index, index) -> !fir.shape<2>
 254 ! CHECK-DAG:       %[[C1_7:.*]] = arith.constant 1 : index
 255 ! CHECK-DAG:       %[[C3_8:.*]] = arith.constant 3 : index
 256 ! CHECK-DAG:       %[[C3_9:.*]] = arith.constant 3 : index
 257 ! CHECK-DAG:       %[[ARRAY_REF:.*]] = hlfir.designate %[[ARRAY]]#0 (%[[C1]]:%[[C3_0]]:%[[C1_3]], %[[C1]]:%[[C3_1]]:%[[C1_5]]) substr %[[C1_7]], %[[C3_8]]  shape %[[SHAPE]] typeparams %[[C3_9]] : (!fir.ref<!fir.array<3x3x!fir.char<1,3>>>, index, index, index, index, index, index, index, index, !fir.shape<2>, index) -> !fir.ref<!fir.array<3x3x!fir.char<1,3>>>
 258 ! CHECK:           %[[EXPR:.*]] = hlfir.maxval %[[ARRAY_REF]] {fastmath = #arith.fastmath<contract>} : (!fir.ref<!fir.array<3x3x!fir.char<1,3>>>) -> !hlfir.expr<!fir.char<1,3>>
 259 ! CHECK-NEXT:      hlfir.assign %[[EXPR]] to %[[RES]]#0 : !hlfir.expr<!fir.char<1,3>>, !fir.ref<!fir.char<1,3>>
 260 ! CHECK-NEXT:      hlfir.destroy %[[EXPR]]
 261 ! CHECK-NEXT:      return
 262 ! CHECK-NEXT:    }