[IR] Fix bugs in MFVC function references support

Signed-off-by: Evgeniy.Zhelenskiy <Evgeniy.Zhelenskiy@jetbrains.com>

#KT-1179

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/CommonBackendContext.kt

@@ -72,6 +72,11 @@ interface CommonBackendContext : BackendContext, LoggingContext, ErrorReportingC
     val optimizeNullChecksUsingKotlinNullability: Boolean
         get() = true
 
+    fun remapMultiFieldValueClassStructure(
+        oldFunction: IrFunction, newFunction: IrFunction,
+        parametersMappingOrNull: Map<IrValueParameter, IrValueParameter>?
+    ) = Unit
+
     /**
      * See [InlineClassesUtils].
      */

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/DefaultArgumentStubGenerator.kt

@@ -9,15 +9,11 @@ import org.jetbrains.kotlin.backend.common.BodyLoweringPass
 import org.jetbrains.kotlin.backend.common.CommonBackendContext
 import org.jetbrains.kotlin.backend.common.DeclarationTransformer
 import org.jetbrains.kotlin.backend.common.descriptors.synthesizedString
-import org.jetbrains.kotlin.backend.common.ir.*
+import org.jetbrains.kotlin.backend.common.ir.ValueRemapper
 import org.jetbrains.kotlin.descriptors.DescriptorVisibilities
-import org.jetbrains.kotlin.descriptors.DescriptorVisibility
-import org.jetbrains.kotlin.descriptors.Modality
 import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
 import org.jetbrains.kotlin.ir.builders.*
 import org.jetbrains.kotlin.ir.builders.declarations.addValueParameter
-import org.jetbrains.kotlin.ir.builders.declarations.buildConstructor
-import org.jetbrains.kotlin.ir.builders.declarations.buildFun
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.expressions.impl.*
@@ -32,7 +28,6 @@ import org.jetbrains.kotlin.ir.types.makeNullable
 import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
 import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
-import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.util.OperatorNameConventions
 
 // TODO: fix expect/actual default parameters
@@ -521,7 +516,9 @@ private class MaskedDefaultArgumentFunctionFactory(context: CommonBackendContext
                 IrDeclarationOrigin.METHOD_HANDLER_IN_DEFAULT_FUNCTION
             )
         }
-
+        context.remapMultiFieldValueClassStructure(
+            original, this, parametersMappingOrNull = original.explicitParameters.zip(explicitParameters).toMap()
+        )
     }
 }
 

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/LocalDeclarationsLowering.kt

@@ -705,6 +705,11 @@ class LocalDeclarationsLowering(
                 isExplicitLocalFunction = oldDeclaration.origin == IrDeclarationOrigin.LOCAL_FUNCTION
             )
             newDeclaration.recordTransformedValueParameters(localFunctionContext)
+            val parametersMapping = buildMap {
+                oldDeclaration.extensionReceiverParameter?.let { put(it, newDeclaration.extensionReceiverParameter!!) }
+                putAll(oldDeclaration.valueParameters zip newDeclaration.valueParameters.takeLast(oldDeclaration.valueParameters.size))
+            }
+            context.remapMultiFieldValueClassStructure(oldDeclaration, newDeclaration, parametersMapping)
 
             newDeclaration.annotations = oldDeclaration.annotations