[Flang] [OpenMP] Allow any type as argument to the FlushOp (#143844)

Fixes: #143842

flang/test/Lower/OpenMP/flush02.f90

@@ -0,0 +1,32 @@
+! This test checks lowering of OpenMP Flush Directive.
+
+!RUN: %flang_fc1 -emit-hlfir -fopenmp %s -o - | FileCheck %s
+
+module flush02_mod
+    type t1
+       integer(kind=4) :: x = 4
+    end type t1
+
+    type :: t2
+       type(t1) :: y = t1(2)
+    end type t2
+
+
+contains
+
+    subroutine sub01(pt)
+        class(t1), intent(inout) :: pt
+        type(t2)                 :: dt
+        integer, allocatable     :: a(:)
+        integer, pointer         :: b(:)
+
+        ! CHECK: omp.flush({{.*}} : !fir.ref<!fir.box<!fir.heap<!fir.array<?xi32>>>>)
+        ! CHECK: omp.flush({{.*}} : !fir.ref<f32>)
+        ! CHECK: omp.flush({{.*}} : !fir.ref<!fir.type<_QMflush02_modTt2{y:!fir.type<_QMflush02_modTt1{x:i32}>}>>)
+        ! CHECK: omp.flush({{.*}} : !fir.class<!fir.type<_QMflush02_modTt1{x:i32}>>)
+        !$omp flush(a)
+        !$omp flush(p)
+        !$omp flush(dt)
+        !$omp flush(pt)
+    end subroutine
+end module flush02_mod

mlir/include/mlir/Dialect/OpenMP/OpenMPOps.td

@@ -889,7 +889,7 @@ def FlushOp : OpenMP_Op<"flush", clauses = [
     specified or implied.
   }] # clausesDescription;
 
-  let arguments = !con((ins Variadic<OpenMP_PointerLikeType>:$varList),
+  let arguments = !con((ins Variadic<AnyType>:$varList),
                        clausesArgs);
 
   // Override inherited assembly format to include `varList`.