[FIR] Introduce valueClassRepresentation to FIR

#KT-1179

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

@@ -40,12 +40,6 @@ abstract class IrClass :
 
     abstract var valueClassRepresentation: ValueClassRepresentation<IrSimpleType>?
 
-    val inlineClassRepresentation: InlineClassRepresentation<IrSimpleType>?
-        get() = valueClassRepresentation as? InlineClassRepresentation<IrSimpleType>
-
-    val multiFieldValueClassRepresentation: MultiFieldValueClassRepresentation<IrSimpleType>?
-        get() = valueClassRepresentation as? MultiFieldValueClassRepresentation<IrSimpleType>
-
     abstract var sealedSubclasses: List<IrClassSymbol>
 
     override fun <R, D> accept(visitor: IrElementVisitor<R, D>, data: D): R =

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

@@ -10,6 +10,7 @@ import org.jetbrains.kotlin.descriptors.MultiFieldValueClassRepresentation
 import org.jetbrains.kotlin.descriptors.ValueParameterDescriptor
 import org.jetbrains.kotlin.ir.ObsoleteDescriptorBasedAPI
 import org.jetbrains.kotlin.ir.expressions.IrExpressionBody
+import org.jetbrains.kotlin.ir.types.IrSimpleType
 import java.io.File
 
 fun <D : IrAttributeContainer> D.copyAttributes(other: IrAttributeContainer?): D = apply {
@@ -55,3 +56,10 @@ val IrFunction.isStaticMethodOfClass: Boolean
 
 val IrFunction.isPropertyAccessor: Boolean
     get() = this is IrSimpleFunction && correspondingPropertySymbol != null
+
+
+val IrClass.multiFieldValueClassRepresentation: MultiFieldValueClassRepresentation<IrSimpleType>?
+    get() = valueClassRepresentation as? MultiFieldValueClassRepresentation<IrSimpleType>
+
+val IrClass.inlineClassRepresentation: InlineClassRepresentation<IrSimpleType>?
+    get() = valueClassRepresentation as? InlineClassRepresentation<IrSimpleType>

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/types/IrTypeSystemContext.kt

@@ -465,7 +465,7 @@ interface IrTypeSystemContext : TypeSystemContext, TypeSystemCommonSuperTypesCon
     override fun TypeConstructorMarker.isMultiFieldValueClass(): Boolean =
         (this as? IrClassSymbol)?.owner?.isMultiFieldValueClass == true
 
-    override fun TypeConstructorMarker.valueClassRepresentationTypeMarkersList(): List<Pair<Name, SimpleTypeMarker>>? =
+    override fun TypeConstructorMarker.getValueClassProperties(): List<Pair<Name, SimpleTypeMarker>>? =
         (this as? IrClassSymbol)?.owner?.valueClassRepresentation?.underlyingPropertyNamesToTypes
 
     override fun TypeConstructorMarker.isInnerClass(): Boolean =

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

@@ -8,6 +8,7 @@ package org.jetbrains.kotlin.ir.util
 import org.jetbrains.kotlin.ir.declarations.IrClass
 import org.jetbrains.kotlin.ir.declarations.IrField
 import org.jetbrains.kotlin.ir.declarations.IrProperty
+import org.jetbrains.kotlin.ir.declarations.inlineClassRepresentation
 import org.jetbrains.kotlin.ir.types.IrSimpleType
 
 fun getInlineClassUnderlyingType(irClass: IrClass): IrSimpleType {