flang/test/Lower/HLFIR/function-return.f90

   1 ! Test lowering of function return to HLFIR
   2 ! RUN: bbc -emit-fir -hlfir -o - %s 2>&1 | FileCheck %s
   3
   4 integer function simple_return()
   5   simple_return = 42
   6 end function
   7 ! CHECK-LABEL: func.func @_QPsimple_return() -> i32 {
   8 ! CHECK:  %[[VAL_0:.*]] = fir.alloca i32
   9 ! CHECK:  %[[VAL_1:.*]]:2 = hlfir.declare %[[VAL_0]] {uniq_name = "_QFsimple_returnEsimple_return"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
  10 ! CHECK:  %[[VAL_2:.*]] = arith.constant 42 : i32
  11 ! CHECK:  hlfir.assign %[[VAL_2]] to %[[VAL_1]]#0 : i32, !fir.ref<i32>
  12 ! CHECK:  %[[VAL_3:.*]] = fir.load %[[VAL_1]]#1 : !fir.ref<i32>
  13 ! CHECK:  return %[[VAL_3]] : i32
  14
  15 character(10) function char_return()
  16   char_return = "hello"
  17 end function
  18 ! CHECK-LABEL: func.func @_QPchar_return(
  19 ! CHECK-SAME:  %[[VAL_0:.*]]: !fir.ref<!fir.char<1,10>>
  20 ! CHECK:  %[[VAL_2:.*]] = fir.convert %[[VAL_0]] : (!fir.ref<!fir.char<1,10>>) -> !fir.ref<!fir.char<1,?>>
  21 ! CHECK:  %[[VAL_3:.*]] = arith.constant 10 : index
  22 ! CHECK:  %[[VAL_4:.*]]:2 = hlfir.declare %[[VAL_2]] typeparams %[[VAL_3]] {uniq_name = "_QFchar_returnEchar_return"} : (!fir.ref<!fir.char<1,?>>, index) -> (!fir.boxchar<1>, !fir.ref<!fir.char<1,?>>)
  23 ! CHECK:  %[[VAL_8:.*]] = fir.emboxchar %[[VAL_4]]#1, %[[VAL_3]] : (!fir.ref<!fir.char<1,?>>, index) -> !fir.boxchar<1>
  24 ! CHECK:  return %[[VAL_8]] : !fir.boxchar<1>
  25
  26 integer function array_return()
  27   dimension :: array_return(10)
  28   array_return = 42
  29 end function
  30 ! CHECK-LABEL: func.func @_QParray_return() -> !fir.array<10xi32> {
  31 ! CHECK:  %[[VAL_1:.*]] = fir.alloca !fir.array<10xi32>
  32 ! CHECK:  %[[VAL_3:.*]]:2 = hlfir.declare %[[VAL_1]]{{.*}} {uniq_name = "_QFarray_returnEarray_return"} : (!fir.ref<!fir.array<10xi32>>, !fir.shape<1>) -> (!fir.ref<!fir.array<10xi32>>, !fir.ref<!fir.array<10xi32>>)
  33 ! CHECK:  %[[VAL_4:.*]] = fir.load %[[VAL_3]]#1 : !fir.ref<!fir.array<10xi32>>
  34 ! CHECK:  return %[[VAL_4]] : !fir.array<10xi32>
  35
  36 character(5) function char_array_return()
  37   dimension :: char_array_return(10)
  38   char_array_return = "hello"
  39 end function
  40 ! CHECK-LABEL: func.func @_QPchar_array_return() -> !fir.array<10x!fir.char<1,5>> {
  41 ! CHECK:  %[[VAL_2:.*]] = fir.alloca !fir.array<10x!fir.char<1,5>>
  42 ! CHECK:  %[[VAL_4:.*]]:2 = hlfir.declare %[[VAL_2]]{{.*}} {uniq_name = "_QFchar_array_returnEchar_array_return"} : (!fir.ref<!fir.array<10x!fir.char<1,5>>>, !fir.shape<1>, index) -> (!fir.ref<!fir.array<10x!fir.char<1,5>>>, !fir.ref<!fir.array<10x!fir.char<1,5>>>)
  43 ! CHECK:  %[[VAL_5:.*]] = fir.load %[[VAL_4]]#1 : !fir.ref<!fir.array<10x!fir.char<1,5>>>
  44 ! CHECK:  return %[[VAL_5]] : !fir.array<10x!fir.char<1,5>>