backend/common: adapt common lowering to use in konan

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/common/Lower.kt

@@ -18,6 +18,7 @@ package org.jetbrains.kotlin.backend.common
 
 import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.declarations.IrClass
+import org.jetbrains.kotlin.ir.declarations.IrDeclarationContainer
 import org.jetbrains.kotlin.ir.declarations.IrFile
 import org.jetbrains.kotlin.ir.declarations.IrFunction
 import org.jetbrains.kotlin.ir.expressions.IrBody
@@ -33,6 +34,10 @@ interface ClassLoweringPass {
     fun lower(irClass: IrClass)
 }
 
+interface DeclarationContainerLoweringPass {
+    fun lower(irDeclarationContainer: IrDeclarationContainer)
+}
+
 interface FunctionLoweringPass {
     fun lower(irFunction: IrFunction)
 }
@@ -54,6 +59,17 @@ fun ClassLoweringPass.runOnFilePostfix(irFile: IrFile) {
     })
 }
 
+fun DeclarationContainerLoweringPass.asClassLoweringPass() = object : ClassLoweringPass {
+    override fun lower(irClass: IrClass) {
+        this@asClassLoweringPass.lower(irClass)
+    }
+}
+
+fun DeclarationContainerLoweringPass.runOnFilePostfix(irFile: IrFile) {
+    this.asClassLoweringPass().runOnFilePostfix(irFile)
+    this.lower(irFile)
+}
+
 fun BodyLoweringPass.runOnFilePostfix(irFile: IrFile) {
     irFile.acceptVoid(object : IrElementVisitorVoid {
         override fun visitElement(element: IrElement) {

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/common/lower/LocalFunctionsLowering.kt

@@ -16,10 +16,7 @@
 
 package org.jetbrains.kotlin.backend.common.lower
 
-import org.jetbrains.kotlin.backend.common.AbstractClosureAnnotator
-import org.jetbrains.kotlin.backend.common.BackendContext
-import org.jetbrains.kotlin.backend.common.ClassLoweringPass
-import org.jetbrains.kotlin.backend.common.Closure
+import org.jetbrains.kotlin.backend.common.*
 import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.descriptors.impl.SimpleFunctionDescriptorImpl
 import org.jetbrains.kotlin.descriptors.impl.ValueParameterDescriptorImpl
@@ -27,6 +24,7 @@ import org.jetbrains.kotlin.ir.IrElement
 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.IrDeclarationContainer
 import org.jetbrains.kotlin.ir.declarations.IrFunction
 import org.jetbrains.kotlin.ir.declarations.impl.IrFunctionImpl
 import org.jetbrains.kotlin.ir.expressions.*
@@ -42,9 +40,9 @@ import org.jetbrains.kotlin.resolve.descriptorUtil.parentsWithSelf
 import org.jetbrains.kotlin.types.KotlinType
 import java.util.*
 
-class LocalFunctionsLowering(val context: BackendContext): ClassLoweringPass {
-    override fun lower(irClass: IrClass) {
-        irClass.declarations.transformFlat { memberDeclaration ->
+class LocalFunctionsLowering(val context: BackendContext): DeclarationContainerLoweringPass {
+    override fun lower(irDeclarationContainer: IrDeclarationContainer) {
+        irDeclarationContainer.declarations.transformFlat { memberDeclaration ->
             if (memberDeclaration is IrFunction)
                 LocalFunctionsTransformer(memberDeclaration).lowerLocalFunctions()
             else