[flang][semantics] ensure defined io dummies are not arrays.

[akuhlens]

fixes #162709

[llvmbot]

@llvm/pr-subscribers-flang-semantics

Author: Andre Kuhlenschmidt (akuhlens)

Changes

fixes #162709

---

Full diff: https://github.com/llvm/llvm-project/pull/162744.diff

2 Files Affected:

• (modified) flang/lib/Semantics/check-declarations.cpp (+2)
• (modified) flang/test/Semantics/io11.f90 (+21)

diff --git a/flang/lib/Semantics/check-declarations.cpp b/flang/lib/Semantics/check-declarations.cpp
index 75934243b7916..8cb0d3335c616 100644
--- a/flang/lib/Semantics/check-declarations.cpp
+++ b/flang/lib/Semantics/check-declarations.cpp
@@ -3623,6 +3623,7 @@ void CheckHelper::CheckDioDtvArg(const Symbol &proc, const Symbol &subp,
                 ioKind == common::DefinedIo::ReadUnformatted
             ? Attr::INTENT_INOUT
             : Attr::INTENT_IN);
+    CheckDioDummyIsScalar(subp, *arg);
   }
 }
 
@@ -3688,6 +3689,7 @@ void CheckHelper::CheckDioAssumedLenCharacterArg(const Symbol &subp,
           "Dummy argument '%s' of a defined input/output procedure must be assumed-length CHARACTER of default kind"_err_en_US,
           arg->name());
     }
+    CheckDioDummyIsScalar(subp, *arg);
   }
 }
 
diff --git a/flang/test/Semantics/io11.f90 b/flang/test/Semantics/io11.f90
index c00deede6b516..6bb7a71f0defc 100644
--- a/flang/test/Semantics/io11.f90
+++ b/flang/test/Semantics/io11.f90
@@ -809,3 +809,24 @@ subroutine wf(dtv, unit, iotype, v_list, iostat, iomsg)
     end
   end interface
 end
+
+module m30
+    type base
+        character(5), allocatable :: data
+    end type
+    interface write(formatted)
+        subroutine formattedRead (dtv, unit, iotype, v_list, iostat, iomsg)
+        import base
+            !ERROR: Dummy argument 'dtv' of a defined input/output procedure must be a scalar
+            class (base), intent(in) :: dtv(10)
+            integer, intent(in) :: unit
+            !ERROR: Dummy argument 'iotype' of a defined input/output procedure must be a scalar
+            character(*), intent(in) :: iotype(2)
+            integer, intent(in) :: v_list(:)
+            !ERROR: Dummy argument 'iostat' of a defined input/output procedure must be a scalar
+            integer, intent(out) :: iostat(*)
+            !ERROR: Dummy argument 'iomsg' of a defined input/output procedure must be a scalar
+            character(*), intent(inout) :: iomsg(:)
+        end subroutine
+    end interface
+end module

[DanielCChen]

LGTM.
Thanks.