ForeignObject add __eq__ node.

- this allows testing if foreign null values are None using the "==" op

Author: cosminbasca

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/foreign/TruffleObjectBuiltins.java

@@ -32,6 +32,7 @@
 import static com.oracle.graal.python.nodes.SpecialMethodNames.__DELATTR__;
 import static com.oracle.graal.python.nodes.SpecialMethodNames.__DELITEM__;
 import static com.oracle.graal.python.nodes.SpecialMethodNames.__DIR__;
+import static com.oracle.graal.python.nodes.SpecialMethodNames.__EQ__;
 import static com.oracle.graal.python.nodes.SpecialMethodNames.__FLOORDIV__;
 import static com.oracle.graal.python.nodes.SpecialMethodNames.__GETITEM__;
 import static com.oracle.graal.python.nodes.SpecialMethodNames.__GE__;
@@ -43,6 +44,7 @@
 import static com.oracle.graal.python.nodes.SpecialMethodNames.__LT__;
 import static com.oracle.graal.python.nodes.SpecialMethodNames.__MUL__;
 import static com.oracle.graal.python.nodes.SpecialMethodNames.__NEW__;
+import static com.oracle.graal.python.nodes.SpecialMethodNames.__NE__;
 import static com.oracle.graal.python.nodes.SpecialMethodNames.__RADD__;
 import static com.oracle.graal.python.nodes.SpecialMethodNames.__REPR__;
 import static com.oracle.graal.python.nodes.SpecialMethodNames.__RFLOORDIV__;
@@ -716,6 +718,14 @@ protected GeNode() {
         }
     }
 
+    @Builtin(name = __EQ__, fixedNumOfPositionalArgs = 2)
+    @GenerateNodeFactory
+    public abstract static class EqNode extends ForeignBinaryComparisonNode {
+        protected EqNode() {
+            super(BinaryComparisonNode.create(__EQ__, __NE__, "=="));
+        }
+    }
+
     @Builtin(name = __ITER__, fixedNumOfPositionalArgs = 1)
     @GenerateNodeFactory
     public abstract static class IterNode extends UnboxNode {

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/expression/IsNode.java

@@ -40,7 +40,6 @@
  */
 package com.oracle.graal.python.nodes.expression;
 
-import com.oracle.graal.python.builtins.objects.PNone;
 import com.oracle.graal.python.builtins.objects.cext.CExtNodes;
 import com.oracle.graal.python.builtins.objects.cext.PythonNativeObject;
 import com.oracle.graal.python.builtins.objects.ints.PInt;
@@ -49,10 +48,7 @@
 import com.oracle.truffle.api.dsl.Fallback;
 import com.oracle.truffle.api.dsl.ImportStatic;
 import com.oracle.truffle.api.dsl.Specialization;
-import com.oracle.truffle.api.interop.ForeignAccess;
 import com.oracle.truffle.api.interop.Message;
-import com.oracle.truffle.api.interop.TruffleObject;
-import com.oracle.truffle.api.nodes.Node;
 
 @ImportStatic(Message.class)
 public abstract class IsNode extends BinaryOpNode {
@@ -178,12 +174,6 @@ boolean doNative(PythonNativeObject left, PythonNativeObject right,
         return isNode.execute(left, right);
     }
 
-    @Specialization(guards = "isForeignObject(left)")
-    boolean doForeignObject(TruffleObject left, @SuppressWarnings("unused") PNone none,
-                    @Cached("IS_NULL.createNode()") Node isNullNode) {
-        return ForeignAccess.sendIsNull(isNullNode, left);
-    }
-
     @Fallback
     boolean doGeneric(Object left, Object right) {
         return left == right;