JVM_IR: read serialized IR from annotation

core/descriptors.jvm/src/org/jetbrains/kotlin/load/kotlin/header/ReadKotlinClassHeaderAnnotationVisitor.java

@@ -20,6 +20,7 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.kotlin.descriptors.SourceElement;
 import org.jetbrains.kotlin.load.java.JvmAnnotationNames;
+import org.jetbrains.kotlin.metadata.jvm.deserialization.BitEncoding;
 import org.jetbrains.kotlin.metadata.jvm.deserialization.JvmMetadataVersion;
 import org.jetbrains.kotlin.name.ClassId;
 import org.jetbrains.kotlin.name.FqName;
@@ -57,6 +58,7 @@ public class ReadKotlinClassHeaderAnnotationVisitor implements AnnotationVisitor
     private String[] strings = null;
     private String[] incompatibleData = null;
     private KotlinClassHeader.Kind headerKind = null;
+    private String[] serializedIrFields = null;
 
     @Nullable
     public KotlinClassHeader createHeader() {
@@ -77,7 +79,22 @@ public class ReadKotlinClassHeaderAnnotationVisitor implements AnnotationVisitor
             return null;
         }
 
-        return new KotlinClassHeader(headerKind, metadataVersion, data, incompatibleData, strings, extraString, extraInt, packageName);
+        byte[] serializedIr = null;
+        if (serializedIrFields != null) {
+            serializedIr = BitEncoding.decodeBytes(serializedIrFields);
+        }
+
+        return new KotlinClassHeader(
+                headerKind,
+                metadataVersion,
+                data,
+                incompatibleData,
+                strings,
+                extraString,
+                extraInt,
+                packageName,
+                serializedIr
+        );
     }
 
     private boolean shouldHaveData() {
@@ -161,6 +178,9 @@ public class ReadKotlinClassHeaderAnnotationVisitor implements AnnotationVisitor
             else if (METADATA_STRINGS_FIELD_NAME.equals(string)) {
                 return stringsArrayVisitor();
             }
+            else if (METADATA_SERIALIZED_IR_FIELD_NAME.equals(string)) {
+                return serializedIrArrayVisitor();
+            }
             else {
                 return null;
             }
@@ -186,6 +206,16 @@ public class ReadKotlinClassHeaderAnnotationVisitor implements AnnotationVisitor
             };
         }
 
+        @NotNull
+        private AnnotationArrayArgumentVisitor serializedIrArrayVisitor() {
+            return new CollectStringArrayAnnotationVisitor() {
+                @Override
+                protected void visitEnd(@NotNull String[] result) {
+                    serializedIrFields = result;
+                }
+            };
+        }
+
         @Override
         public void visitEnum(@NotNull Name name, @NotNull ClassId enumClassId, @NotNull Name enumEntryName) {
         }

core/deserialization.common.jvm/src/org/jetbrains/kotlin/load/kotlin/header/KotlinClassHeader.kt

@@ -18,7 +18,8 @@ class KotlinClassHeader(
     val strings: Array<String>?,
     private val extraString: String?,
     val extraInt: Int,
-    val packageName: String?
+    val packageName: String?,
+    val serializedIr: ByteArray?,
 ) {
     // See kotlin.Metadata
     enum class Kind(val id: Int) {