[flang] Handle dynamically optional argument in EXIT

The actual argument passed to STATUS may be a dummy OPTIONAL or a
disassociated POINTER/unallocated ALLOCATABLE.

Differential Revision: https://reviews.llvm.org/D123380

diff --git a/flang/lib/Lower/IntrinsicCall.cpp b/flang/lib/Lower/IntrinsicCall.cpp
index a37f659..9baedab 100644 (file)
--- a/flang/lib/Lower/IntrinsicCall.cpp
+++ b/flang/lib/Lower/IntrinsicCall.cpp
@@ -729,7 +729,7 @@ static constexpr IntrinsicHandler handlers[]{
      /*isElemental=*/false},
     {"exit",
      &I::genExit,
-     {{{"status", asValue}}},
+     {{{"status", asValue, handleDynamicOptional}}},
      /*isElemental=*/false},
     {"exponent", &I::genExponent},
     {"floor", &I::genFloor},

diff --git a/flang/test/Lower/Intrinsics/exit-2.f90 b/flang/test/Lower/Intrinsics/exit-2.f90
new file mode 100644 (file)
index 0000000..5f2b31f
--- /dev/null
+++ b/flang/test/Lower/Intrinsics/exit-2.f90
@@ -0,0 +1,40 @@
+! Test EXIT with dynamically optional arguments.
+! RUN: bbc -emit-fir %s -o - | FileCheck %s
+
+! CHECK-LABEL: func @_QPexit_opt_dummy(
+! CHECK-SAME:  %[[VAL_0:.*]]: !fir.ref<i32> {fir.bindc_name = "status", fir.optional}) {
+subroutine exit_opt_dummy(status)
+  integer, optional :: status
+  call exit(status)
+! CHECK:  %[[VAL_1:.*]] = fir.is_present %[[VAL_0]] : (!fir.ref<i32>) -> i1
+! CHECK:  %[[VAL_2:.*]] = fir.if %[[VAL_1]] -> (i32) {
+! CHECK:    %[[VAL_3:.*]] = fir.load %[[VAL_0]] : !fir.ref<i32>
+! CHECK:    fir.result %[[VAL_3]] : i32
+! CHECK:  } else {
+! CHECK:    %[[VAL_4:.*]] = arith.constant 0 : i32
+! CHECK:    fir.result %[[VAL_4]] : i32
+! CHECK:  }
+! CHECK:  %[[VAL_5:.*]] = fir.call @_FortranAExit(%[[VAL_6:.*]]) : (i32) -> none
+end subroutine
+
+! CHECK-LABEL: func @_QPexit_pointer(
+! CHECK-SAME:  %[[VAL_0:.*]]: !fir.ref<!fir.box<!fir.ptr<i32>>> {fir.bindc_name = "status"}) {
+subroutine exit_pointer(status)
+  integer, pointer :: status
+  call exit(status)
+! CHECK:  %[[VAL_1:.*]] = fir.load %[[VAL_0]] : !fir.ref<!fir.box<!fir.ptr<i32>>>
+! CHECK:  %[[VAL_2:.*]] = fir.box_addr %[[VAL_1]] : (!fir.box<!fir.ptr<i32>>) -> !fir.ptr<i32>
+! CHECK:  %[[VAL_3:.*]] = fir.convert %[[VAL_2]] : (!fir.ptr<i32>) -> i64
+! CHECK:  %[[VAL_4:.*]] = arith.constant 0 : i64
+! CHECK:  %[[VAL_5:.*]] = arith.cmpi ne, %[[VAL_3]], %[[VAL_4]] : i64
+! CHECK:  %[[VAL_6:.*]] = fir.if %[[VAL_5]] -> (i32) {
+! CHECK:    %[[VAL_7:.*]] = fir.load %[[VAL_0]] : !fir.ref<!fir.box<!fir.ptr<i32>>>
+! CHECK:    %[[VAL_8:.*]] = fir.box_addr %[[VAL_7]] : (!fir.box<!fir.ptr<i32>>) -> !fir.ptr<i32>
+! CHECK:    %[[VAL_9:.*]] = fir.load %[[VAL_8]] : !fir.ptr<i32>
+! CHECK:    fir.result %[[VAL_9]] : i32
+! CHECK:  } else {
+! CHECK:    %[[VAL_10:.*]] = arith.constant 0 : i32
+! CHECK:    fir.result %[[VAL_10]] : i32
+! CHECK:  }
+! CHECK:  %[[VAL_11:.*]] = fir.call @_FortranAExit(%[[VAL_12:.*]]) : (i32) -> none
+end subroutine