Support platform/impl modifiers for properties

Do not allow platform properties to have backing fields, initializers, be
delegated, lateinit or const, or have accessors with bodies

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/descriptors/JvmDescriptorWithExtraFlags.kt

@@ -20,10 +20,8 @@ import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.descriptors.annotations.Annotations
 import org.jetbrains.kotlin.descriptors.impl.FunctionDescriptorImpl
 import org.jetbrains.kotlin.descriptors.impl.PropertyDescriptorImpl
-import org.jetbrains.kotlin.descriptors.impl.SimpleFunctionDescriptorImpl
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.types.KotlinType
-import org.jetbrains.org.objectweb.asm.commons.Method
 
 interface JvmDescriptorWithExtraFlags {
     val extraFlags: Int
@@ -41,10 +39,12 @@ class JvmPropertyDescriptorImpl(
         kind: CallableMemberDescriptor.Kind,
         source: SourceElement,
         isLateInit: Boolean,
-        isConst: Boolean
+        isConst: Boolean,
+        isPlatform: Boolean,
+        isImpl: Boolean
 ) : JvmDescriptorWithExtraFlags, PropertyDescriptorImpl(
         containingDeclaration, original, annotations, modality, visibility, isVar,
-        name, kind, source, isLateInit, isConst
+        name, kind, source, isLateInit, isConst, isPlatform, isImpl
 ) {
     override fun createSubstitutedCopy(
             newOwner: DeclarationDescriptor,
@@ -55,7 +55,7 @@ class JvmPropertyDescriptorImpl(
     ): PropertyDescriptorImpl =
             JvmPropertyDescriptorImpl(
                     newOwner, original, annotations, newModality, newVisibility, extraFlags, isVar, name, kind,
-                    SourceElement.NO_SOURCE, isLateInit, isConst
+                    SourceElement.NO_SOURCE, isLateInit, isConst, isPlatform, isImpl
             )
 
     companion object {
@@ -71,7 +71,7 @@ class JvmPropertyDescriptorImpl(
         ): PropertyDescriptorImpl =
                 JvmPropertyDescriptorImpl(
                         containingDeclaration, null, annotations, modality, visibility, extraFlags, false, name,
-                        CallableMemberDescriptor.Kind.SYNTHESIZED, source, false, false
+                        CallableMemberDescriptor.Kind.SYNTHESIZED, source, false, false, false, false
                 ).initialize(type)
 
         fun createFinalField(
@@ -85,7 +85,7 @@ class JvmPropertyDescriptorImpl(
         ): PropertyDescriptorImpl =
                 JvmPropertyDescriptorImpl(
                         classDescriptor, null, annotations, Modality.FINAL, visibility, extraFlags, false, name,
-                        CallableMemberDescriptor.Kind.SYNTHESIZED, source, false, false
+                        CallableMemberDescriptor.Kind.SYNTHESIZED, source, false, false, false, false
                 ).initialize(type, dispatchReceiverParameter = classDescriptor.thisAsReceiverParameter)
     }
 }
@@ -108,4 +108,4 @@ class JvmFunctionDescriptorImpl(
                 SourceElement.NO_SOURCE, extraFlags
         )
     }
-}
+}

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/descriptors/SharedVariablesManager.kt

@@ -59,7 +59,7 @@ class JvmSharedVariablesManager(val builtIns: KotlinBuiltIns) : SharedVariablesM
                 PropertyDescriptorImpl.create(
                         refClass, Annotations.EMPTY, Modality.FINAL, Visibilities.PUBLIC, true,
                         Name.identifier("element"), CallableMemberDescriptor.Kind.DECLARATION, SourceElement.NO_SOURCE,
-                        false, false
+                        false, false, false, false
                 ).initialize(type, dispatchReceiverParameter = refClass.thisAsReceiverParameter)
     }
 
@@ -99,7 +99,7 @@ class JvmSharedVariablesManager(val builtIns: KotlinBuiltIns) : SharedVariablesM
                 PropertyDescriptorImpl.create(
                         genericRefClass, Annotations.EMPTY, Modality.FINAL, Visibilities.PUBLIC, true,
                         Name.identifier("element"), CallableMemberDescriptor.Kind.DECLARATION, SourceElement.NO_SOURCE,
-                        false, false
+                        false, false, false, false
                 ).initialize(
                         type = builtIns.anyType,
                         dispatchReceiverParameter = genericRefClass.thisAsReceiverParameter

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/descriptors/SpecialDescriptorsFactory.kt

@@ -128,7 +128,7 @@ class SpecialDescriptorsFactory(
                 objectDescriptor,
                 Annotations.EMPTY, Modality.FINAL, Visibilities.PUBLIC, false,
                 Name.identifier("INSTANCE"),
-                CallableMemberDescriptor.Kind.SYNTHESIZED, SourceElement.NO_SOURCE, false, false
+                CallableMemberDescriptor.Kind.SYNTHESIZED, SourceElement.NO_SOURCE, false, false, false, false
         ).initialize(objectDescriptor.defaultType)
 
         return instanceFieldDescriptor