fixup! Add AOT code-generation.

Author: areusch

src/target/metadata_module.cc

@@ -124,15 +124,17 @@ static runtime::Module CreateCppMetadataModule(
     target_module = const_loader_mod;
   }
 
-  runtime::metadata::Metadata runtime_metadata = ConvertMetaData(metadata);
-
-  if (metadata->executor == runtime::kTvmExecutorAot && runtime->name == relay::kTvmRuntimeCpp) {
-    if (target->kind->name == "c") {
-      auto metadata_module = CreateCSourceCppMetadataModule(runtime_metadata);
-      metadata_module->Import(target_module);
-      target_module = metadata_module;
-    } else {
-      CHECK(false) << "Don't know how to create MetadataModule for target type " << target->str();
+  if (metadata.defined()) {
+    runtime::metadata::Metadata runtime_metadata = ConvertMetaData(metadata);
+
+    if (metadata->executor == runtime::kTvmExecutorAot && runtime->name == relay::kTvmRuntimeCpp) {
+      if (target->kind->name == "c") {
+        auto metadata_module = CreateCSourceCppMetadataModule(runtime_metadata);
+        metadata_module->Import(target_module);
+        target_module = metadata_module;
+      } else {
+        CHECK(false) << "Don't know how to create MetadataModule for target type " << target->str();
+      }
     }
   }
 

src/target/source/source_module.cc

@@ -700,8 +700,7 @@ class MetadataSerializer : public AttrVisitor {
       if (key != nullptr) {
         address_.push_back(key);
       }
-      code_ << address_from_parts(address_) << " , " << arr->array.size() << " /* " << key
-            << "_size */";
+      code_ << address_from_parts(address_);
       if (key != nullptr) {
         address_.pop_back();
       }