IR: propagate original declaration info via attributeOwnerId

For IrProperty, IrSimpleFunction we need to pass information about
original declaration to JVM_IR codegen. Instead of descriptors, use
the attributeOwnerId field.

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/IrProperty.kt

@@ -23,7 +23,7 @@ import org.jetbrains.kotlin.ir.visitors.IrElementTransformer
 import org.jetbrains.kotlin.ir.visitors.IrElementVisitor
 import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedContainerSource
 
-abstract class IrProperty : IrDeclarationBase(), IrOverridableMember, IrMetadataSourceOwner {
+abstract class IrProperty : IrDeclarationBase(), IrOverridableMember, IrMetadataSourceOwner, IrAttributeContainer {
     @ObsoleteDescriptorBasedAPI
     abstract override val descriptor: PropertyDescriptor
     abstract override val symbol: IrPropertySymbol

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/lazy/IrLazyFunction.kt

@@ -86,7 +86,10 @@ class IrLazyFunction(
             stubGenerator.generateFunctionStub(it.original).symbol
         }
     }
-    override var attributeOwnerId: IrAttributeContainer = this
+
+    override var attributeOwnerId: IrAttributeContainer
+        get() = this
+        set(_) = error("We should never need to change attributeOwnerId of external declarations.")
 
     override var correspondingPropertySymbol: IrPropertySymbol? = null
 

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/lazy/IrLazyProperty.kt

@@ -78,4 +78,8 @@ class IrLazyProperty(
     override var metadata: MetadataSource?
         get() = null
         set(_) = error("We should never need to store metadata of external declarations.")
+
+    override var attributeOwnerId: IrAttributeContainer
+        get() = this
+        set(_) = error("We should never need to change attributeOwnerId of external declarations.")
 }

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/IrUtils.kt

@@ -547,3 +547,9 @@ fun IrExpression.isSafeToUseWithoutCopying() =
             this is IrGetEnumValue ||
             this is IrConst<*> ||
             this is IrGetValue && symbol.isBound && symbol.owner.isImmutable
+
+val IrFunction.originalFunction: IrFunction
+    get() = (this as? IrAttributeContainer)?.attributeOwnerId as? IrFunction ?: this
+
+val IrProperty.originalProperty: IrProperty
+    get() = attributeOwnerId as? IrProperty ?: this