From d67d8016d305edbf03c571a1cdad70f81aaf4df4 Mon Sep 17 00:00:00 2001
From: Dmitry Petrov <Dmitry.Petrov@jetbrains.com>
Date: Fri, 16 Sep 2016 17:28:44 +0300
Subject: [PATCH] Lowering for property declarations.

---
 .../jetbrains/kotlin/backend/jvm/JvmLower.kt  |  4 +-
 .../backend/jvm/lower/FileClassLowering.kt    |  5 +-
 .../backend/jvm/lower/PropertiesLowering.kt   | 61 +++++++++++++++++++
 3 files changed, 66 insertions(+), 4 deletions(-)
 create mode 100644 compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/PropertiesLowering.kt

diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmLower.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmLower.kt
index 2e5734cae2a..4424aac1b8e 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmLower.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmLower.kt
@@ -17,10 +17,12 @@
 package org.jetbrains.kotlin.backend.jvm
 
 import org.jetbrains.kotlin.backend.jvm.lower.FileClassLowering
+import org.jetbrains.kotlin.backend.jvm.lower.PropertiesLowering
 import org.jetbrains.kotlin.ir.declarations.IrFile
 
 class JvmLower(val context: JvmBackendContext) {
     fun lower(irFile: IrFile) {
-        FileClassLowering(context).lower(irFile)
+        FileClassLowering(context.jvmFileClassProvider).lower(irFile)
+        PropertiesLowering().lower(irFile)
     }
 }
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/FileClassLowering.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/FileClassLowering.kt
index 479d0e82cc9..c87827c720e 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/FileClassLowering.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/FileClassLowering.kt
@@ -16,7 +16,6 @@
 
 package org.jetbrains.kotlin.backend.jvm.lower
 
-import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
 import org.jetbrains.kotlin.ir.declarations.IrClass
 import org.jetbrains.kotlin.ir.declarations.IrDeclaration
 import org.jetbrains.kotlin.ir.declarations.IrDeclarationOrigin
@@ -24,7 +23,7 @@ import org.jetbrains.kotlin.ir.declarations.IrFile
 import org.jetbrains.kotlin.ir.declarations.impl.IrClassImpl
 import java.util.*
 
-class FileClassLowering(val context: JvmBackendContext) {
+class FileClassLowering(val jvmFileClassProvider: JvmFileClassProvider) {
     fun lower(irFile: IrFile) {
         val classes = ArrayList<IrClass>()
         val fileClassMembers = ArrayList<IrDeclaration>()
@@ -38,7 +37,7 @@ class FileClassLowering(val context: JvmBackendContext) {
 
         if (fileClassMembers.isEmpty()) return
 
-        val fileClassDescriptor = context.jvmFileClassProvider.createFileClassDescriptor(irFile.fileEntry, irFile.packageFragmentDescriptor)
+        val fileClassDescriptor = jvmFileClassProvider.createFileClassDescriptor(irFile.fileEntry, irFile.packageFragmentDescriptor)
 
         val irFileClass = IrClassImpl(0, irFile.fileEntry.maxOffset, IrDeclarationOrigin.DEFINED, fileClassDescriptor, fileClassMembers)
         classes.add(irFileClass)
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/PropertiesLowering.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/PropertiesLowering.kt
new file mode 100644
index 00000000000..4e451c299d3
--- /dev/null
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/PropertiesLowering.kt
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2010-2016 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.backend.jvm.lower
+
+import org.jetbrains.kotlin.ir.IrStatement
+import org.jetbrains.kotlin.ir.declarations.IrClass
+import org.jetbrains.kotlin.ir.declarations.IrDeclaration
+import org.jetbrains.kotlin.ir.declarations.IrFile
+import org.jetbrains.kotlin.ir.declarations.IrProperty
+import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
+import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
+import org.jetbrains.kotlin.utils.addIfNotNull
+import java.util.*
+
+class PropertiesLowering : IrElementTransformerVoid {
+    fun lower(irFile: IrFile) {
+        irFile.transformChildrenVoid(this)
+    }
+
+    override fun visitFile(declaration: IrFile): IrFile {
+        declaration.transformChildrenVoid(this)
+        transformDeclarations(declaration.declarations)
+        return declaration
+    }
+
+    override fun visitClass(declaration: IrClass): IrStatement {
+        declaration.transformChildrenVoid(this)
+        transformDeclarations(declaration.declarations)
+        return declaration
+    }
+
+    private fun transformDeclarations(declarations: MutableList<IrDeclaration>) {
+        val properties = linkedSetOf<IrProperty>()
+
+        declarations.filterIsInstanceTo(properties)
+
+        declarations.removeAll(properties)
+
+        properties.flatMapTo(declarations) { irProperty ->
+            val result = ArrayList<IrDeclaration>(3)
+            result.addIfNotNull(irProperty.backingField)
+            result.addIfNotNull(irProperty.getter)
+            result.addIfNotNull(irProperty.setter)
+            result
+        }
+    }
+}