Fixed issues with generated scale operator (#40482)

* Fixed issues with generated scale operator

* Fixed minor issues

paddle/fluid/eager/auto_code_generator/eager_generator.cc

@@ -56,23 +56,29 @@ static std::string LegalizeVariableName(const std::string& var_name) {
   return ret;
 }
 
-static bool IgnoreGradAttribute(const std::string& op_type,
-                                const std::string& attr_name) {
-  // Attributes in operators_with_attrs are created manually during code
-  // generation
-  // We should ignore these arbitrary attrs when setting up grad attribute map
-  if (operators_with_attrs.count(op_type)) {
-    if (operators_with_attrs[op_type].count(attr_name)) {
-      return true;
-    }
-  }
+static std::string HandleDynamicGradAttributes(const std::string& fwd_op_type,
+                                               const std::string& attrs_name) {
+  std::string additional_grad_attrs_str = "";
 
-  // Only allow SumOp
-  if (op_type != "sum") {
-    return true;
+  if (fwd_op_type == "sum") {
+    const char* GRAD_ATTRS_TEMPLATE = "  %s[\"%s\"] = %s;\n";
+    additional_grad_attrs_str = paddle::string::Sprintf(
+        GRAD_ATTRS_TEMPLATE, attrs_name, "scale", "float(1.0)");
+    additional_grad_attrs_str += paddle::string::Sprintf(
+        GRAD_ATTRS_TEMPLATE, attrs_name, "bias", "float(0.0f)");
+    additional_grad_attrs_str += paddle::string::Sprintf(
+        GRAD_ATTRS_TEMPLATE, attrs_name, "bias_after_scale", "bool(true)");
+
+  } else if (fwd_op_type == "scale") {
+    const char* GRAD_ATTRS_TEMPLATE = "  %s[\"%s\"] = %s;\n";
+
+    additional_grad_attrs_str += paddle::string::Sprintf(
+        GRAD_ATTRS_TEMPLATE, attrs_name, "bias", "float(0.0f)");
+    additional_grad_attrs_str += paddle::string::Sprintf(
+        GRAD_ATTRS_TEMPLATE, attrs_name, "bias_after_scale", "bool(true)");
   }
 
-  return false;
+  return additional_grad_attrs_str;
 }
 
 static void PrepareAttrMapForOps() {
@@ -1866,18 +1872,9 @@ static std::string GenerateSingleOpBase(
   const char* ATTRS_TEMPLATE = "  auto& %s = this->attr_map_;\n";
   std::string grad_attrs_str =
       paddle::string::Sprintf(ATTRS_TEMPLATE, attrs_name);
-  for (const auto& iter : grad_attrs) {
-    if (IgnoreGradAttribute(fwd_op_type, iter.first)) continue;
-    std::pair<std::string, std::string> type_val =
-        GetAttrType(iter.second, false /*is_arg*/);
-    const char* GRAD_ATTRS_TEMPLATE =
-        "  %s %s = %s;\n"
-        "  %s[\"%s\"] = %s;\n";
-    std::string var_name = iter.first + std::to_string(*outs_size);
-    grad_attrs_str += paddle::string::Sprintf(
-        GRAD_ATTRS_TEMPLATE, type_val.first, var_name, type_val.second,
-        attrs_name, iter.first, var_name);
-  }
+
+  // Handle dynamic grad attributes
+  grad_attrs_str += HandleDynamicGradAttributes(fwd_op_type, attrs_name);
   generated_grad_function_body += grad_attrs_str;
 
   const char* TRACE_OP_TEMPLATE =