more cpp20 initializers in xnnpack

Author: JacobSzwejbka

backends/xnnpack/runtime/XNNCompiler.cpp

@@ -1563,8 +1563,8 @@ Error defineGenericUnaryNode(
       const fb_xnnpack::XNNGraph* graph) noexcept {                      \
     MAYBE_UNUSED(graph);                                                 \
     auto graph_node = node->xnode_union_as_XNNLeakyReLU();               \
-    union xnn_unary_params params = {                                    \
-        .leaky_relu = {.negative_slope = graph_node->negative_slope()}}; \
+    union xnn_unary_params params;                                       \
+    params.leaky_relu.negative_slope = graph_node->negative_slope();     \
     return defineGenericUnaryNode(                                       \
         subgraph_ptr,                                                    \
         remapped_ids,                                                    \
@@ -1586,7 +1586,8 @@ Error defineGenericUnaryNode(
       const fb_xnnpack::XNNGraph* graph) noexcept {                          \
     MAYBE_UNUSED(graph);                                                     \
     auto graph_node = node->xnode_union_as_XNNELU();                         \
-    union xnn_unary_params params = {.elu = {.alpha = graph_node->alpha()}}; \
+    union xnn_unary_params params;                                           \
+    params.elu.alpha = graph_node->alpha();                                  \
     return defineGenericUnaryNode(                                           \
         subgraph_ptr,                                                        \
         remapped_ids,                                                        \
@@ -1638,8 +1639,9 @@ Error defineGenericBinaryNode(
     MAYBE_UNUSED(graph);                                            \
     auto graph_node = node->xnode_union_as_XNN##name();             \
     std::pair<float, float> min_max = getOutputMinMax(node);        \
-    struct xnn_binary_params params = {                             \
-        .output_min = min_max.first, .output_max = min_max.second}; \
+    struct xnn_binary_params params;                                \
+    params.output_min = min_max.first;                              \
+    params.output_max = min_max.second;                             \
     return defineGenericBinaryNode(                                 \
         subgraph_ptr,                                               \
         remapped_ids,                                               \

backends/xnnpack/runtime/XNNWeightsCache.cpp

@@ -228,11 +228,10 @@ size_t XNNWeightsCache::look_up_or_insert(
         weight_bias_name.append(bias_entry->second);
       }
     }
-    PackedDataMeta packed_data_metadata = {
-        .offset = next_offset,
-        .ref_count =
-            0, // ref_count is only incremented after finalizing for runtime
-        .in_current_runtime = true};
+    PackedDataMeta packed_data_metadata;
+    packed_data_metadata.offset = next_offset;
+    packed_data_metadata.ref_count = 0; // ref_count is only incremented after finalizing for runtime
+    packed_data_metadata.in_current_runtime = true;
     context->name_to_packed_data_metadata_[weight_bias_name] =
         packed_data_metadata;
   } else {