diff --git a/flang/include/flang/Evaluate/tools.h b/flang/include/flang/Evaluate/tools.h
index 5fcc745..7919625 100644
--- a/flang/include/flang/Evaluate/tools.h
+++ b/flang/include/flang/Evaluate/tools.h
@@ -91,10 +91,11 @@
 
 // Predicate: true when an expression is a coarray (corank > 0)
 bool IsCoarray(const ActualArgument &);
+bool IsCoarray(const Symbol &);
 template <typename A> bool IsCoarray(const A &) { return false; }
 template <typename A> bool IsCoarray(const Designator<A> &designator) {
   if (const auto *symbol{std::get_if<SymbolRef>(&designator.u)}) {
-    return symbol->get().Corank() > 0;
+    return IsCoarray(**symbol);
   }
   return false;
 }
@@ -1051,7 +1052,6 @@
 bool IsProcedure(const Scope &);
 bool IsProcedurePointer(const Symbol &);
 bool IsAutomatic(const Symbol &);
-bool IsCoarray(const Symbol &);
 bool IsSaved(const Symbol &); // saved implicitly or explicitly
 bool IsDummy(const Symbol &);
 bool IsFunctionResult(const Symbol &);
diff --git a/flang/lib/Evaluate/tools.cpp b/flang/lib/Evaluate/tools.cpp
index 4e8054f..b5300fc 100644
--- a/flang/lib/Evaluate/tools.cpp
+++ b/flang/lib/Evaluate/tools.cpp
@@ -699,10 +699,12 @@
 }
 
 bool IsCoarray(const ActualArgument &arg) {
-  if (const auto *expr{arg.UnwrapExpr()}) {
-    return IsCoarray(*expr);
-  }
-  return false;
+  const auto *expr{arg.UnwrapExpr()};
+  return expr && IsCoarray(*expr);
+}
+
+bool IsCoarray(const Symbol &symbol) {
+  return GetAssociationRoot(symbol).Corank() > 0;
 }
 
 bool IsProcedure(const Expr<SomeType> &expr) {
@@ -1193,10 +1195,6 @@
   return false;
 }
 
-bool IsCoarray(const Symbol &symbol) {
-  return GetAssociationRoot(symbol).Corank() > 0;
-}
-
 bool IsSaved(const Symbol &original) {
   const Symbol &symbol{GetAssociationRoot(original)};
   const Scope &scope{symbol.owner()};
@@ -1212,7 +1210,7 @@
     return false;
   } else if (scopeKind == Scope::Kind::Module ||
       (scopeKind == Scope::Kind::MainProgram &&
-          (symbol.attrs().test(Attr::TARGET) || IsCoarray(symbol)))) {
+          (symbol.attrs().test(Attr::TARGET) || evaluate::IsCoarray(symbol)))) {
     // 8.5.16p4
     // In main programs, implied SAVE matters only for pointer
     // initialization targets and coarrays.
diff --git a/flang/lib/Semantics/check-allocate.cpp b/flang/lib/Semantics/check-allocate.cpp
index 456d594..8a3a23a 100644
--- a/flang/lib/Semantics/check-allocate.cpp
+++ b/flang/lib/Semantics/check-allocate.cpp
@@ -541,7 +541,7 @@
     CHECK(context.AnyFatalError());
     return false;
   }
-  if (IsCoarray(*symbol_)) {
+  if (evaluate::IsCoarray(*symbol_)) {
     if (allocateInfo_.gotTypeSpec) {
       // C938
       if (const DerivedTypeSpec *
diff --git a/flang/lib/Semantics/check-declarations.cpp b/flang/lib/Semantics/check-declarations.cpp
index 6b52de5..1295d5b 100644
--- a/flang/lib/Semantics/check-declarations.cpp
+++ b/flang/lib/Semantics/check-declarations.cpp
@@ -372,7 +372,7 @@
     messages_.Say(
         "VALUE attribute may not apply to an assumed-size array"_err_en_US);
   }
-  if (IsCoarray(symbol)) {
+  if (evaluate::IsCoarray(symbol)) {
     messages_.Say("VALUE attribute may not apply to a coarray"_err_en_US);
   }
   if (IsAllocatable(symbol)) {
@@ -432,7 +432,7 @@
             "Assumed-type argument '%s' cannot be INTENT(OUT)"_err_en_US,
             symbol.name());
       }
-      if (IsCoarray(symbol)) {
+      if (evaluate::IsCoarray(symbol)) {
         messages_.Say(
             "Assumed-type argument '%s' cannot be a coarray"_err_en_US,
             symbol.name());
@@ -486,7 +486,7 @@
   if (details.isDummy()) {
     if (symbol.attrs().test(Attr::INTENT_OUT)) {
       if (FindUltimateComponent(symbol, [](const Symbol &x) {
-            return IsCoarray(x) && IsAllocatable(x);
+            return evaluate::IsCoarray(x) && IsAllocatable(x);
           })) { // C846
         messages_.Say(
             "An INTENT(OUT) dummy argument may not be, or contain, an ALLOCATABLE coarray"_err_en_US);
@@ -545,7 +545,7 @@
         messages_.Say(
             "A dummy argument of an ELEMENTAL procedure may not be ALLOCATABLE"_err_en_US);
       }
-      if (IsCoarray(symbol)) {
+      if (evaluate::IsCoarray(symbol)) {
         messages_.Say(
             "A dummy argument of an ELEMENTAL procedure may not be a coarray"_err_en_US);
       }
@@ -1448,7 +1448,7 @@
   }
   if (symbol.has<UseDetails>() || symbol.has<HostAssocDetails>()) {
     const Symbol &ultimate{symbol.GetUltimate()};
-    if (IsCoarray(ultimate)) {
+    if (evaluate::IsCoarray(ultimate)) {
       messages_.Say(
           "VOLATILE attribute may not apply to a coarray accessed by USE or host association"_err_en_US);
     }
diff --git a/flang/lib/Semantics/check-do-forall.cpp b/flang/lib/Semantics/check-do-forall.cpp
index 1532dea..42a2ee6 100644
--- a/flang/lib/Semantics/check-do-forall.cpp
+++ b/flang/lib/Semantics/check-do-forall.cpp
@@ -132,7 +132,7 @@
 
   // Predicate for deallocations caused by intrinsic assignment
   static bool DeallocateNonCoarray(const Symbol &component) {
-    return !IsCoarray(component);
+    return !evaluate::IsCoarray(component);
   }
 
   static bool WillDeallocatePolymorphic(const Symbol &entity,
diff --git a/flang/lib/Semantics/resolve-names.cpp b/flang/lib/Semantics/resolve-names.cpp
index 8ad0f5a..679af0b 100644
--- a/flang/lib/Semantics/resolve-names.cpp
+++ b/flang/lib/Semantics/resolve-names.cpp
@@ -4978,7 +4978,7 @@
         "Finalizable variable '%s' not allowed in a locality-spec"_err_en_US);
     return false;
   }
-  if (IsCoarray(symbol)) { // C1128
+  if (evaluate::IsCoarray(symbol)) { // C1128
     SayWithDecl(
         name, symbol, "Coarray '%s' not allowed in a locality-spec"_err_en_US);
     return false;
diff --git a/flang/lib/Semantics/tools.cpp b/flang/lib/Semantics/tools.cpp
index 0be899c..e4d1e2f 100644
--- a/flang/lib/Semantics/tools.cpp
+++ b/flang/lib/Semantics/tools.cpp
@@ -924,7 +924,7 @@
 private:
   bool IsCoarrayObject(const parser::AllocateObject &allocateObject) {
     const parser::Name &name{GetLastName(allocateObject)};
-    return name.symbol && IsCoarray(*name.symbol);
+    return name.symbol && evaluate::IsCoarray(*name.symbol);
   }
 };
 
@@ -988,7 +988,7 @@
 bool HasCoarray(const parser::Expr &expression) {
   if (const auto *expr{GetExpr(expression)}) {
     for (const Symbol &symbol : evaluate::CollectSymbols(*expr)) {
-      if (IsCoarray(GetAssociationRoot(symbol))) {
+      if (evaluate::IsCoarray(symbol)) {
         return true;
       }
     }
@@ -1248,7 +1248,8 @@
 UltimateComponentIterator::const_iterator FindCoarrayUltimateComponent(
     const DerivedTypeSpec &derived) {
   UltimateComponentIterator ultimates{derived};
-  return std::find_if(ultimates.begin(), ultimates.end(), IsCoarray);
+  return std::find_if(ultimates.begin(), ultimates.end(),
+      [](const Symbol &symbol) { return evaluate::IsCoarray(symbol); });
 }
 
 UltimateComponentIterator::const_iterator FindPointerUltimateComponent(
@@ -1288,7 +1289,7 @@
     const DerivedTypeSpec &derived) {
   UltimateComponentIterator ultimates{derived};
   return std::find_if(ultimates.begin(), ultimates.end(), [](const Symbol &x) {
-    return IsPolymorphicAllocatable(x) && !IsCoarray(x);
+    return IsPolymorphicAllocatable(x) && !evaluate::IsCoarray(x);
   });
 }