REMOVE_DIST_ARRAYS_FROM_IO: consider write/read statements with nested loops

src/Transformations/ReplaceArraysInIO/replace_dist_arrays_in_io.cpp

@@ -17,6 +17,14 @@ using std::pair;
 
 #define DEBUG_TRACE 0
 
+static bool hasArrayRef(SgExpression* ex)
+{
+    if (ex)
+        return isArrayRef(ex) || hasArrayRef(ex->lhs()) || hasArrayRef(ex->rhs());
+
+    return false;
+}
+
 static inline bool isArrayDeclaration(SgStatement* st)
 {
     return isSgDeclarationStatement(st) || isSgVarListDeclStmt(st) || isSgNestedVarListDeclStmt(st);
@@ -201,11 +209,15 @@ static bool populateDistributedIoArrays(map<SgSymbol*, set<SgStatement*>>& array
         if (!arg)
             return false;
 
-        if (!isArrayRef(arg))
+        if (hasArrayRef(arg))
+        {
+            if (isArrayRef(arg) && arg->lhs())
+                need_replace = true;
+        }
+        else
+        {
             return false;
-
-        if (arg->lhs())
-            need_replace = true;
+        }
     }
     else
     {