Review fixes

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanLower.kt

@@ -55,13 +55,9 @@ internal class KonanLower(val context: Context) {
         phaser.phase(KonanPhase.LOWER_VARARG) {
             VarargInjectionLowering(context).runOnFilePostfix(irFile)
         }
-        phaser.phase(KonanPhase.LOWER_DELEGATION) {
-            DelegationLowering(context).runOnFilePostfix(irFile)
-        }
         phaser.phase(KonanPhase.BRIDGES_BUILDING) {
+            DelegationLowering(context).runOnFilePostfix(irFile)
             BridgesBuilding(context).runOnFilePostfix(irFile)
-        }
-        phaser.phase(KonanPhase.LOWER_DIRECT_BRIDGES_CALLS) {
             DirectBridgesCallsLowering(context).runOnFilePostfix(irFile)
         }
         phaser.phase(KonanPhase.AUTOBOX) {

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/KonanPhases.kt

@@ -25,8 +25,6 @@ enum class KonanPhase(val description: String,
     /* ... ... */ LOWER_STRING_CONCAT("String concatenation lowering"),
     /* ... ... */ LOWER_INITIALIZERS("Initializers lowering"),
     /* ... ... */ BRIDGES_BUILDING("Bridges building"),
-    /* ... ... */ LOWER_DELEGATION("Delegation lowering"),
-    /* ... ... */ LOWER_DIRECT_BRIDGES_CALLS("Direct bridges calls lowering"),
     /* ... */ BITCODE("LLVM BitCode Generation"),
     /* ... ... */ RTTI("RTTI Generation"),
     /* ... ... */ CODEGEN("Code Generation"),

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/descriptors/DescriptorUtils.kt

@@ -22,7 +22,6 @@ import org.jetbrains.kotlin.resolve.scopes.MemberScope
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.typeUtil.isUnit
 import org.jetbrains.kotlin.util.OperatorNameConventions
-import java.util.*
 
 /**
  * List of all implemented interfaces (including those which implemented by a super class)
@@ -254,11 +253,14 @@ internal class BridgeDirections(val array: Array<BridgeDirection>) {
         if (this === other) return true
         if (other !is BridgeDirections) return false
 
-        return (Arrays.equals(array, other.array))
+        return array.size == other.array.size
+                && array.indices.all { array[it] == other.array[it] }
     }
 
     override fun hashCode(): Int {
-        return Arrays.hashCode(array)
+        var result = 0
+        array.forEach { result = result * 31 + it.ordinal }
+        return result
     }
 }
 
@@ -273,7 +275,7 @@ internal fun FunctionDescriptor.bridgeDirectionsTo(overriddenDescriptor: Functio
     if (!kind.isReal
             && OverridingUtil.overrides(target, overriddenDescriptor)
             && ourDirections == target.bridgeDirectionsTo(overriddenDescriptor)) {
-        // Bridge is inherited from supers
+        // Bridge is inherited from superclass.
         return BridgeDirections(this.valueParameters.size)
     }
 

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/IrToBitcode.kt

@@ -1225,7 +1225,8 @@ internal class CodeGeneratorVisitor(val context: Context) : IrElementVisitorVoid
     private fun evaluateGetField(value: IrGetField): LLVMValueRef {
         context.log("evaluateGetField           : ${ir2string(value)}")
         if (value.descriptor.dispatchReceiverParameter != null
-                || value.descriptor is IrImplementingDelegateDescriptorImpl) { // TODO: hack because of IR bug.
+                // TODO: hack because of IR bug: https://github.com/JetBrains/kotlin/tree/rr/dispatch_receiver_for_delegate_descriptor.
+                || value.descriptor is IrImplementingDelegateDescriptorImpl) {
             val thisPtr = evaluateExpression(value.receiver!!)
             return codegen.loadSlot(
                     fieldPtrOfClass(thisPtr, value.descriptor), value.descriptor.isVar())
@@ -1256,7 +1257,8 @@ internal class CodeGeneratorVisitor(val context: Context) : IrElementVisitorVoid
         val valueToAssign = evaluateExpression(value.value)
 
         if (value.descriptor.dispatchReceiverParameter != null
-                || value.descriptor is IrImplementingDelegateDescriptorImpl) { // TODO: hack because of IR bug.
+                // TODO: hack because of IR bug: https://github.com/JetBrains/kotlin/tree/rr/dispatch_receiver_for_delegate_descriptor.
+                || value.descriptor is IrImplementingDelegateDescriptorImpl) {
             val thisPtr = evaluateExpression(value.receiver!!)
             codegen.storeAnyGlobal(valueToAssign, fieldPtrOfClass(thisPtr, value.descriptor))
         }

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/LlvmDeclarations.kt

@@ -299,9 +299,11 @@ private class DeclarationsGeneratorVisitor(override val context: Context) :
 
         val dispatchReceiverParameter = descriptor.dispatchReceiverParameter
         if (dispatchReceiverParameter != null
-                || descriptor is IrImplementingDelegateDescriptorImpl) { // TODO: hack because of IR bug.
+                // TODO: hack because of IR bug: https://github.com/JetBrains/kotlin/tree/rr/dispatch_receiver_for_delegate_descriptor.
+                || descriptor is IrImplementingDelegateDescriptorImpl) {
             val containingClass = dispatchReceiverParameter?.containingDeclaration
-                    ?: descriptor.containingDeclaration // TODO: hack because of IR bug.
+                    // TODO: hack because of IR bug: https://github.com/JetBrains/kotlin/tree/rr/dispatch_receiver_for_delegate_descriptor.
+                    ?: descriptor.containingDeclaration
             val classDeclarations = this.classes[containingClass] ?: error(containingClass.toString())
 
             val allFields = classDeclarations.fields

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/RTTIGenerator.kt

@@ -173,7 +173,7 @@ internal class RTTIGenerator(override val context: Context) : ContextUtils {
             val bridgeOwner = if (!descriptor.kind.isReal
                     && OverridingUtil.overrides(target, overriddenDescriptor)
                     && descriptor.bridgeDirectionsTo(overriddenDescriptor).allNotNeeded()) {
-                target // Bridge is inherited from supers
+                target // Bridge is inherited from superclass.
             } else {
                 descriptor
             }

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/BridgesBuilding.kt

@@ -27,7 +27,7 @@ internal class DirectBridgesCallsLowering(val context: Context) : BodyLoweringPa
                 val descriptor = expression.descriptor as? FunctionDescriptor ?: return expression
                 if (descriptor.modality == Modality.ABSTRACT
                         || (expression.superQualifier == null && descriptor.isOverridable)) {
-                    // A virtual call. box/unbox will be in the corresponding bridge.
+                    // A virtual call. boxing/unboxing will be in the corresponding bridge.
                     return expression
                 }
 
@@ -39,7 +39,7 @@ internal class DirectBridgesCallsLowering(val context: Context) : BodyLoweringPa
                 val toCall = if (needBridge) {
                     target
                 } else {
-                    // Need to call delegating fun.
+                    // Need to call delegating function.
                     context.specialDescriptorsFactory.getBridgeDescriptor(OverriddenFunctionDescriptor(descriptor, target))
                 }
 
@@ -81,10 +81,8 @@ internal class DelegationLowering(val context: Context) : ClassLoweringPass {
                 is IrProperty -> {
                     val getter = transformBridgeToDelegatedMethod(irClass, it.getter)
                     val setter = transformBridgeToDelegatedMethod(irClass, it.setter)
-                    if (getter != null || setter != null) {
-                        it.getter = getter
-                        it.setter = setter
-                    }
+                    if (getter != null) it.getter = getter
+                    if (setter != null) it.setter = setter
                     null
                 }
                 else -> null
@@ -92,7 +90,7 @@ internal class DelegationLowering(val context: Context) : ClassLoweringPass {
         }
     }
 
-    // TODO: hack because of broken IR for synthesized delegated members.
+    // TODO: hack because of broken IR for synthesized delegated members: https://youtrack.jetbrains.com/issue/KT-16486.
     private fun transformBridgeToDelegatedMethod(irClass: IrClass, irFunction: IrFunction?): IrFunction? {
         if (irFunction == null || irFunction.descriptor.kind != CallableMemberDescriptor.Kind.DELEGATION) return null