JVM IR: remove CrIrType, use class container in callable reference lowerings

This is possible now because after 3a9b94235f, 0423d0f41e and
5341de253f, all top level functions/properties in sources and in
binaries have a corresponding containing facade class

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmSymbols.kt

@@ -7,6 +7,7 @@ package org.jetbrains.kotlin.backend.jvm
 
 import org.jetbrains.kotlin.backend.common.ir.Symbols
 import org.jetbrains.kotlin.backend.common.ir.createImplicitParameterDeclarationWithWrappedDescriptor
+import org.jetbrains.kotlin.backend.jvm.intrinsics.KClassJavaProperty
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.descriptors.ClassKind
 import org.jetbrains.kotlin.descriptors.Modality
@@ -18,6 +19,7 @@ import org.jetbrains.kotlin.ir.declarations.IrDeclarationOrigin
 import org.jetbrains.kotlin.ir.declarations.IrPackageFragment
 import org.jetbrains.kotlin.ir.declarations.impl.IrExternalPackageFragmentImpl
 import org.jetbrains.kotlin.ir.symbols.IrClassSymbol
+import org.jetbrains.kotlin.ir.symbols.IrPropertySymbol
 import org.jetbrains.kotlin.ir.symbols.IrSimpleFunctionSymbol
 import org.jetbrains.kotlin.ir.symbols.impl.IrExternalPackageFragmentSymbolImpl
 import org.jetbrains.kotlin.ir.types.defaultType
@@ -50,6 +52,7 @@ class JvmSymbols(
     private fun createPackage(fqName: FqName): IrPackageFragment =
         IrExternalPackageFragmentImpl(IrExternalPackageFragmentSymbolImpl(EmptyPackageFragmentDescriptor(context.state.module, fqName)))
 
+    private val kotlinJvmPackage: IrPackageFragment = createPackage(FqName("kotlin.jvm"))
     private val kotlinJvmInternalPackage: IrPackageFragment = createPackage(FqName("kotlin.jvm.internal"))
     private val kotlinJvmFunctionsPackage: IrPackageFragment = createPackage(FqName("kotlin.jvm.functions"))
     private val javaLangPackage: IrPackageFragment = createPackage(FqName("java.lang"))
@@ -307,4 +310,15 @@ class JvmSymbols(
 
     val genericToArray: IrSimpleFunctionSymbol =
         collectionToArrayClass.functions.single { it.owner.name.asString() == "toArray" && it.owner.valueParameters.size == 2 }
+
+    val kClassJava: IrPropertySymbol =
+        buildProperty {
+            name = Name.identifier("java")
+        }.apply {
+            parent = kotlinJvmPackage
+            addGetter().apply {
+                addExtensionReceiver(irBuiltIns.kClassClass.typeWith())
+                returnType = javaLangClass.typeWith()
+            }
+        }.symbol
 }

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ExpressionCodegen.kt

@@ -11,7 +11,6 @@ import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
 import org.jetbrains.kotlin.backend.jvm.intrinsics.IrIntrinsicMethods
 import org.jetbrains.kotlin.backend.jvm.intrinsics.JavaClassProperty
 import org.jetbrains.kotlin.backend.jvm.intrinsics.Not
-import org.jetbrains.kotlin.backend.jvm.lower.CrIrType
 import org.jetbrains.kotlin.backend.jvm.lower.constantValue
 import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.unboxInlineClass
 import org.jetbrains.kotlin.codegen.*
@@ -1080,18 +1079,15 @@ class ExpressionCodegen(
             JavaClassProperty.invokeWith(classReference.argument.accept(this, data))
         } else if (classReference is IrClassReference) {
             val classType = classReference.classType
-            if (classType is CrIrType) {
-                putJavaLangClassInstance(mv, classType.type, null, typeMapper.kotlinTypeMapper)
-                return classReference.onStack
-            } else {
-                val classifier = classType.classifierOrNull
-                if (classifier is IrTypeParameterSymbol) {
-                    assert(classifier.owner.isReified) { "Non-reified type parameter under ::class should be rejected by type checker: ${classifier.owner.dump()}" }
-                    putReifiedOperationMarkerIfTypeIsReifiedParameter(classType, ReifiedTypeInliner.OperationKind.JAVA_CLASS, mv, this)
+            val classifier = classType.classifierOrNull
+            if (classifier is IrTypeParameterSymbol) {
+                assert(classifier.owner.isReified) {
+                    "Non-reified type parameter under ::class should be rejected by type checker: ${classifier.owner.dump()}"
                 }
-
-                putJavaLangClassInstance(mv, typeMapper.mapType(classType), classType.toKotlinType(), typeMapper.kotlinTypeMapper)
+                putReifiedOperationMarkerIfTypeIsReifiedParameter(classType, ReifiedTypeInliner.OperationKind.JAVA_CLASS, mv, this)
             }
+
+            putJavaLangClassInstance(mv, typeMapper.mapType(classType), classType.toKotlinType(), typeMapper.kotlinTypeMapper)
         } else {
             throw AssertionError("not an IrGetClass or IrClassReference: ${classReference.dump()}")
         }

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/CallableReferenceLowering.kt

@@ -51,18 +51,6 @@ import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
 import org.jetbrains.kotlin.load.java.JavaVisibilities
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
-import org.jetbrains.org.objectweb.asm.Type
-
-//Hack implementation to support CR java types in lower
-class CrIrType(val type: Type) : IrType {
-    override val annotations: List<IrConstructorCall> = emptyList()
-
-    override fun equals(other: Any?): Boolean =
-        other is CrIrType && type == other.type
-
-    override fun hashCode(): Int =
-        type.hashCode()
-}
 
 internal val callableReferencePhase = makeIrFilePhase(
     ::CallableReferenceLowering,
@@ -410,42 +398,40 @@ internal class CallableReferenceLowering(val context: JvmBackendContext) : FileL
         }
 
         private fun createGetOwnerMethod(superFunction: IrSimpleFunction): IrSimpleFunction = buildOverride(superFunction).apply {
-            val globalContext = context
-            val state = globalContext.state
-            val irContainer = callee.parent
+            body = context.createIrBuilder(symbol, startOffset, endOffset).run {
+                irExprBody(calculateOwner(callee.parent, this@CallableReferenceLowering.context))
+            }
+        }
+    }
+
+    companion object {
+        internal fun IrBuilderWithScope.calculateOwner(irContainer: IrDeclarationParent, context: JvmBackendContext): IrExpression {
+            val symbols = context.ir.symbols
 
             val isContainerPackage =
-                ((irContainer as? IrClass)?.origin == IrDeclarationOrigin.FILE_CLASS) || irContainer is IrPackageFragment
+                (irContainer as? IrClass)?.origin == IrDeclarationOrigin.FILE_CLASS || irContainer is IrPackageFragment
 
-            val type = when (irContainer) {
-                // TODO: getDefaultType() here is wrong and won't work for arrays
-                is IrClass -> state.typeMapper.mapType(irContainer.defaultType.toKotlinType())
-                else -> state.typeMapper.mapOwner(callee.descriptor)
-            }
-
-            val clazz = globalContext.ir.symbols.javaLangClass
             val clazzRef = IrClassReferenceImpl(
                 UNDEFINED_OFFSET,
                 UNDEFINED_OFFSET,
-                clazz.typeWith(),
-                clazz,
-                CrIrType(type)
+                symbols.javaLangClass.typeWith(),
+                symbols.javaLangClass,
+                // For built-in members (i.e. top level `toString`) we don't know any meaningful container, so we're generating Any.
+                // The non-IR backend generates equally meaningless "kotlin/KotlinPackage" in this case (see KT-17151).
+                (irContainer as? IrClass)?.defaultType ?: context.irBuiltIns.anyNType
             )
 
-            body = context.createIrBuilder(symbol, startOffset, endOffset).run {
-                irExprBody(if (isContainerPackage) {
-                    irCall(globalContext.ir.symbols.getOrCreateKotlinPackage).apply {
-                        putValueArgument(0, clazzRef)
-                        // Note that this name is not used in reflection. There should be the name of the referenced declaration's
-                        // module instead, but there's no nice API to obtain that name here yet
-                        // TODO: write the referenced declaration's module name and use it in reflection
-                        putValueArgument(1, irString(state.moduleName))
-                    }
-                } else {
-                    irCall(globalContext.ir.symbols.getOrCreateKotlinClass).apply {
-                        putValueArgument(0, clazzRef)
-                    }
-                })
+            if (!isContainerPackage) return clazzRef
+
+            val jClass = irGet(symbols.javaLangClass.typeWith(), null, symbols.kClassJava.owner.getter!!.symbol).apply {
+                extensionReceiver = clazzRef
+            }
+            return irCall(symbols.getOrCreateKotlinPackage).apply {
+                putValueArgument(0, jClass)
+                // Note that this name is not used in reflection. There should be the name of the referenced declaration's
+                // module instead, but there's no nice API to obtain that name here yet
+                // TODO: write the referenced declaration's module name and use it in reflection
+                putValueArgument(1, irString(context.state.moduleName))
             }
         }
     }

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/PropertyReferenceLowering.kt

@@ -21,7 +21,6 @@ import org.jetbrains.kotlin.ir.builders.declarations.buildClass
 import org.jetbrains.kotlin.ir.builders.declarations.buildField
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.expressions.*
-import org.jetbrains.kotlin.ir.expressions.impl.IrClassReferenceImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrVarargImpl
 import org.jetbrains.kotlin.ir.symbols.IrClassSymbol
 import org.jetbrains.kotlin.ir.symbols.IrFieldSymbol
@@ -30,7 +29,6 @@ import org.jetbrains.kotlin.ir.symbols.IrSymbol
 import org.jetbrains.kotlin.ir.types.createType
 import org.jetbrains.kotlin.ir.types.impl.IrSimpleTypeImpl
 import org.jetbrains.kotlin.ir.types.impl.makeTypeProjection
-import org.jetbrains.kotlin.ir.types.typeWith
 import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
 import org.jetbrains.kotlin.load.java.JvmAbi
@@ -85,48 +83,18 @@ internal class PropertyReferenceLowering(val context: JvmBackendContext) : Class
     private val kPropertiesFieldType =
         context.ir.symbols.array.createType(false, listOf(makeTypeProjection(kPropertyStarType, Variance.OUT_VARIANCE)))
 
-    // Return some declaration the parent of which is the containing class/package for the referenced property. This is
-    // a bit of a hack, as the reason for not returning the container itself is the `mapImplementationOwner` call below.
-    // TODO: move after LocalDeclarationsLowering and always use the getter/field? Can't move below ConstLowering
-    //       right now -- get() would not be optimized.
-    private val IrMemberAccessExpression.propertyContainerChild: IrDeclaration?
+    private val IrMemberAccessExpression.propertyContainer: IrDeclarationParent
         get() {
-            var current: IrDeclaration? = getter?.owner ?: field?.owner
-            while (current?.parent is IrFunction)
+            var current: IrDeclaration = getter?.owner ?: field?.owner ?: error("Property without getter or field: ${dump()}")
+            while (current.parent is IrFunction)
                 current = current.parent as IrFunction // Local delegated property.
-            return current
+            return current.parent
         }
 
-    // TODO: remove code duplication with CallableReferenceLowering
-    private val IrMemberAccessExpression.parentJavaClassReference
-        get() = IrClassReferenceImpl(
-            startOffset, endOffset,
-            context.ir.symbols.javaLangClass.typeWith(),
-            context.ir.symbols.javaLangClass,
-            // TODO: when the parent is an interface, this should map to DefaultImpls. However, that requires
-            //       moving this lowering below InterfaceLowering; see comment about the ordering above, though.
-            CrIrType(context.state.typeMapper.mapImplementationOwner(propertyContainerChild!!.descriptor))
-        )
-
-    private fun IrBuilderWithScope.buildReflectedContainerReference(expression: IrMemberAccessExpression): IrExpression {
-        val parent = expression.propertyContainerChild?.parent
-        val context = this@PropertyReferenceLowering.context
-        return when {
-            // FileClassLowering creates a class to which all package-level declarations are moved. However, there
-            // can still be external declarations at the package level, which is why we check for both a file class
-            // and a package fragment.
-            parent is IrPackageFragment || (parent is IrClass && parent.origin == IrDeclarationOrigin.FILE_CLASS) ->
-                irCall(context.ir.symbols.getOrCreateKotlinPackage).apply {
-                    putValueArgument(0, expression.parentJavaClassReference)
-                    putValueArgument(1, irString(context.state.moduleName))
-                }
-            parent is IrClass ->
-                irCall(context.ir.symbols.getOrCreateKotlinClass).apply {
-                    putValueArgument(0, expression.parentJavaClassReference)
-                }
-            else -> throw AssertionError("referenced property not inside a class/package fragment")
+    private fun IrBuilderWithScope.buildReflectedContainerReference(expression: IrMemberAccessExpression): IrExpression =
+        with(CallableReferenceLowering) {
+            calculateOwner(expression.propertyContainer, this@PropertyReferenceLowering.context)
         }
-    }
 
     private fun IrClass.addOverride(method: IrSimpleFunction, buildBody: IrBuilderWithScope.(List<IrValueParameter>) -> IrExpression) =
         addFunction {

compiler/testData/codegen/box/reflection/call/inlineClasses/inlineClassConstructor.kt

@@ -1,5 +1,6 @@
-// IGNORE_BACKEND: JS_IR, JS, NATIVE, JVM_IR
+// IGNORE_BACKEND: JS_IR, JS, NATIVE
 // WITH_REFLECT
+
 import kotlin.reflect.KCallable
 import kotlin.test.assertEquals
 
@@ -43,4 +44,4 @@ fun box(): String {
     assertEquals(Z2(Z(42)), ::Z2.call(Z(42)))
 
     return "OK"
-}
+}