[JS IR BE] Fix private members lowering

- visit over file instead of class

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/PrivateMembersLowering.kt

@@ -5,17 +5,15 @@
 
 package org.jetbrains.kotlin.ir.backend.js.lower
 
-import org.jetbrains.kotlin.backend.common.ClassLoweringPass
+import org.jetbrains.kotlin.backend.common.FileLoweringPass
 import org.jetbrains.kotlin.backend.common.descriptors.WrappedSimpleFunctionDescriptor
 import org.jetbrains.kotlin.backend.common.descriptors.WrappedValueParameterDescriptor
 import org.jetbrains.kotlin.backend.common.ir.copyTo
 import org.jetbrains.kotlin.descriptors.Visibilities
+import org.jetbrains.kotlin.ir.IrStatement
 import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
 import org.jetbrains.kotlin.ir.backend.js.JsIrBackendContext
-import org.jetbrains.kotlin.ir.declarations.IrClass
-import org.jetbrains.kotlin.ir.declarations.IrDeclarationOriginImpl
-import org.jetbrains.kotlin.ir.declarations.IrProperty
-import org.jetbrains.kotlin.ir.declarations.IrSimpleFunction
+import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.declarations.impl.IrFunctionImpl
 import org.jetbrains.kotlin.ir.declarations.impl.IrValueParameterImpl
 import org.jetbrains.kotlin.ir.expressions.*
@@ -29,31 +27,45 @@ import org.jetbrains.kotlin.ir.symbols.impl.IrValueParameterSymbolImpl
 import org.jetbrains.kotlin.ir.util.deepCopyWithSymbols
 import org.jetbrains.kotlin.ir.util.transformFlat
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
+import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
 import org.jetbrains.kotlin.name.Name
 
-val STATIC_THIS_PARAMETER = object : IrDeclarationOriginImpl("STATIC_THIS_PARAMETER") {}
+private val STATIC_THIS_PARAMETER = object : IrDeclarationOriginImpl("STATIC_THIS_PARAMETER") {}
 
-class PrivateMembersLowering(val context: JsIrBackendContext) : ClassLoweringPass {
+class PrivateMembersLowering(val context: JsIrBackendContext) : FileLoweringPass {
     private val memberMap = mutableMapOf<IrSimpleFunctionSymbol, IrSimpleFunction>()
 
-    override fun lower(irClass: IrClass) {
+    override fun lower(irFile: IrFile) {
+        transformPrivateDeclarations(irFile)
+        transformPrivateUseSites(irFile)
 
+        memberMap.clear()
+    }
 
-        irClass.declarations.transformFlat {
-            when (it) {
-                is IrSimpleFunction -> transformMemberToStaticFunction(it)?.let { staticFunction ->
-                    memberMap[it.symbol] = staticFunction
-                    listOf(staticFunction)
+    private fun transformPrivateDeclarations(irFile: IrFile) {
+        irFile.transformChildrenVoid(object : IrElementTransformerVoid() {
+            override fun visitClass(declaration: IrClass): IrStatement {
+                declaration.transformChildrenVoid(this)
+                declaration.declarations.transformFlat {
+                    when (it) {
+                        is IrSimpleFunction -> transformMemberToStaticFunction(it)?.let { staticFunction ->
+                            memberMap[it.symbol] = staticFunction
+                            listOf(staticFunction)
+                        }
+                        is IrProperty -> listOf(it.apply {
+                            this.getter = this.getter?.let { g -> transformAccessor(g) }
+                            this.setter = this.setter?.let { s -> transformAccessor(s) }
+                        })
+                        else -> null
+                    }
                 }
-                is IrProperty -> listOf(it.apply {
-                    getter = getter?.let { g -> transformAccessor(g) }
-                    setter = setter?.let { s -> transformAccessor(s) }
-                })
-                else -> null
+                return declaration
             }
-        }
+        })
+    }
 
-        irClass.transform(object : IrElementTransformerVoid() {
+    private fun transformPrivateUseSites(irFile: IrFile) {
+        irFile.transform(object : IrElementTransformerVoid() {
             override fun visitCall(expression: IrCall): IrExpression {
                 super.visitCall(expression)
 
@@ -97,7 +109,6 @@ class PrivateMembersLowering(val context: JsIrBackendContext) : ClassLoweringPas
                 } else expression
             }
 
-
             private fun transformPrivateToStaticCall(expression: IrCall, staticTarget: IrSimpleFunction): IrCall {
                 val newExpression = IrCallImpl(
                     expression.startOffset, expression.endOffset,

js/js.tests/test/org/jetbrains/kotlin/js/test/ir/semantics/IrBoxJsTestGenerated.java

@@ -6494,6 +6494,11 @@ public class IrBoxJsTestGenerated extends AbstractIrBoxJsTest {
             runTest("js/js.translator/testData/box/propertyAccess/packagePropertySet.kt");
         }
 
+        @TestMetadata("privateClassesWithPrivateMembers.kt")
+        public void testPrivateClassesWithPrivateMembers() throws Exception {
+            runTest("js/js.translator/testData/box/propertyAccess/privateClassesWithPrivateMembers.kt");
+        }
+
         @TestMetadata("privatePropertyAccessFromMethod.kt")
         public void testPrivatePropertyAccessFromMethod() throws Exception {
             runTest("js/js.translator/testData/box/propertyAccess/privatePropertyAccessFromMethod.kt");

js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java

@@ -6514,6 +6514,11 @@ public class BoxJsTestGenerated extends AbstractBoxJsTest {
             runTest("js/js.translator/testData/box/propertyAccess/packagePropertySet.kt");
         }
 
+        @TestMetadata("privateClassesWithPrivateMembers.kt")
+        public void testPrivateClassesWithPrivateMembers() throws Exception {
+            runTest("js/js.translator/testData/box/propertyAccess/privateClassesWithPrivateMembers.kt");
+        }
+
         @TestMetadata("privatePropertyAccessFromMethod.kt")
         public void testPrivatePropertyAccessFromMethod() throws Exception {
             runTest("js/js.translator/testData/box/propertyAccess/privatePropertyAccessFromMethod.kt");

js/js.translator/testData/box/propertyAccess/privateClassesWithPrivateMembers.kt

@@ -0,0 +1,14 @@
+// EXPECTED_REACHABLE_NODES: 1305
+
+private class A {
+    private val f = "OK"
+    inline fun ii() = f
+}
+
+
+private class B {
+    private val a = A()
+    fun foo() = a.ii()
+}
+
+fun box() = B().foo()