Sync shared compiler file (#37700)

src/coreclr/src/tools/Common/TypeSystem/Common/TypeSystemHelpers.cs

@@ -62,7 +62,7 @@ public static PointerType MakePointerType(this TypeDesc type)
 
         public static TypeDesc GetParameterType(this TypeDesc type)
         {
-            ParameterizedType paramType = (ParameterizedType) type;
+            ParameterizedType paramType = (ParameterizedType)type;
             return paramType.ParameterType;
         }
 
@@ -381,17 +381,13 @@ public static bool ContainsSignatureVariables(this TypeDesc thisType)
                     return ((ParameterizedType)thisType).ParameterType.ContainsSignatureVariables();
 
                 case TypeFlags.FunctionPointer:
+                    MethodSignature pointerSignature = ((FunctionPointerType)thisType).Signature;
 
-                    var fptr = (FunctionPointerType)thisType;
-                    if (fptr.Signature.ReturnType.ContainsSignatureVariables())
-                        return true;
-
-                    for (int i = 0; i < fptr.Signature.Length; i++)
-                    {
-                        if (fptr.Signature[i].ContainsSignatureVariables())
+                    for (int i = 0; i < pointerSignature.Length; i++)
+                        if (pointerSignature[i].ContainsSignatureVariables())
                             return true;
-                    }
-                    return false;
+
+                    return pointerSignature.ReturnType.ContainsSignatureVariables();
 
                 case TypeFlags.SignatureMethodVariable:
                 case TypeFlags.SignatureTypeVariable: