Store file-level annotations in IrFile (should be on some descriptor, really).

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrFile.kt

@@ -17,13 +17,16 @@
 package org.jetbrains.kotlin.ir.declarations
 
 import org.jetbrains.kotlin.descriptors.PackageFragmentDescriptor
+import org.jetbrains.kotlin.descriptors.annotations.AnnotationDescriptor
 import org.jetbrains.kotlin.ir.*
 import org.jetbrains.kotlin.ir.visitors.IrElementVisitor
+import org.jetbrains.kotlin.utils.SmartList
 import java.util.*
 
 interface IrFile : IrElement {
     val name: String
     val fileEntry: SourceLocationManager.FileEntry
+    val fileAnnotations: List<AnnotationDescriptor>
     val packageFragmentDescriptor: PackageFragmentDescriptor
     val declarations: List<IrDeclaration>
 }
@@ -33,6 +36,12 @@ class IrFileImpl(
         override val name: String,
         override val packageFragmentDescriptor: PackageFragmentDescriptor
 ) : IrElementBase(0, fileEntry.maxOffset), IrFile {
+    override val fileAnnotations: MutableList<AnnotationDescriptor> = SmartList()
+
+    fun addAnnotation(annotation: AnnotationDescriptor) {
+        fileAnnotations.add(annotation)
+    }
+
     override val declarations: MutableList<IrDeclaration> = ArrayList()
 
     fun addDeclaration(declaration: IrDeclaration) {

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/DumpIrTree.kt

@@ -23,6 +23,7 @@ import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.visitors.IrElementVisitor
 import org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid
 import org.jetbrains.kotlin.ir.visitors.acceptChildrenVoid
+import org.jetbrains.kotlin.renderer.DescriptorRenderer
 import org.jetbrains.kotlin.utils.Printer
 
 fun IrElement.dump(): String {
@@ -41,10 +42,28 @@ class DumpIrTreeVisitor(out: Appendable): IrElementVisitor<Unit, String> {
     val printer = Printer(out, "  ")
     val elementRenderer = RenderIrElementVisitor()
 
+    companion object {
+        val ANNOTATIONS_RENDERER = DescriptorRenderer.withOptions { verbose = true }
+    }
+
     override fun visitElement(element: IrElement, data: String) {
         element.dumpLabeledSubTree(data)
     }
 
+    override fun visitFile(declaration: IrFile, data: String) {
+        declaration.dumpLabeledElementWith(data) {
+            if (declaration.fileAnnotations.isNotEmpty()) {
+                printer.println("fileAnnotations:")
+                indented {
+                    declaration.fileAnnotations.forEach {
+                        printer.println(ANNOTATIONS_RENDERER.renderAnnotation(it))
+                    }
+                }
+            }
+            declaration.declarations.forEach { it.accept(this, "") }
+        }
+    }
+
     override fun visitFunction(declaration: IrFunction, data: String) {
         visitFunctionWithParameters(declaration, data)
     }