[Relay] Fix Fuse (#3035)

* save

* fix

* Update fuse_ops.cc

src/relay/pass/fuse_ops.cc

@@ -865,9 +865,17 @@ class FuseMutator : private ExprMutator {
   }
 
   Expr MakeNewFunction(GraphPartitioner::Group* group, Type ret_type, Expr body) {
+    // If the function has no call, it is not a primitive function.
+    struct HasCallVisitor : ExprVisitor {
+      bool has_call = false;
+      void VisitExpr_(const CallNode* op) final {
+        has_call = true;
+      }
+    } visitor;
+    visitor(body);
     const GroupInfo& ginfo = ginfo_[group];
     auto func = FunctionNode::make(ginfo.params, body, ret_type, {});
-    func = FunctionSetAttr(func, "Primitive", tvm::Integer(1));
+    func = FunctionSetAttr(func, "Primitive", tvm::Integer(visitor.has_call));
     return CallNode::make(func, ginfo.arguments, Attrs());
   }
 

tests/python/relay/test_backend_interpreter.py

@@ -51,6 +51,12 @@ def test_tuple_value():
     np.testing.assert_allclose(tv[2].asnumpy(), 3)
 
 
+def test_tuple_getitem():
+    two = relay.add(relay.const(1), relay.const(1))
+    func = relay.Function([], relay.TupleGetItem(relay.Tuple([relay.const(1), relay.const(2)]), 0))
+    check_eval(func, [], 1)
+
+
 def test_id():
     x = relay.var('x', 'float32')
     ident = relay.Function([x], x)
@@ -223,4 +229,6 @@ if __name__ == "__main__":
     test_kwargs_params()
     test_ref()
     test_tensor_value()
-    test_function_taking_adt_ref_tuple()
+    test_tuple_value()
+    test_tuple_getitem()
+    test_function_taking_adt_ref_tuple()
\ No newline at end of file