diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsLoweringPhases.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsLoweringPhases.kt
index 27996aa4c1b..38f073be178 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsLoweringPhases.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsLoweringPhases.kt
@@ -340,7 +340,7 @@ private val autoboxingTransformerPhase = makeJsModulePhase(
 
 private val blockDecomposerLoweringPhase = makeCustomJsModulePhase(
     { context, module ->
-        BlockDecomposerLowering(context).lower(module)
+        JsBlockDecomposerLowering(context).lower(module)
         module.patchDeclarationParents()
     },
     name = "BlockDecomposerLowering",
@@ -384,14 +384,14 @@ private val staticMembersLoweringPhase = makeJsModulePhase(
     description = "Move static member declarations to top-level"
 )
 
-private val objectDeclarationLoweringPhase = makeJsModulePhase(
-    ::ObjectDeclarationLowering,
+private val objectDeclarationLoweringPhase = makeCustomJsModulePhase(
+    { context, module -> ObjectDeclarationLowering(context, context.objectToGetInstanceFunction).lower(module) },
     name = "ObjectDeclarationLowering",
     description = "Create lazy object instance generator functions"
 )
 
-private val objectUsageLoweringPhase = makeJsModulePhase(
-    ::ObjectUsageLowering,
+private val objectUsageLoweringPhase = makeCustomJsModulePhase(
+    { context, module -> ObjectUsageLowering(context, context.objectToGetInstanceFunction).lower(module) },
     name = "ObjectUsageLowering",
     description = "Transform IrGetObjectValue into instance generator call"
 )
@@ -449,4 +449,4 @@ val jsPhases = namedIrModulePhase(
             callsLoweringPhase then
             staticMembersLoweringPhase then
             validateIrAfterLowering
-)
+)
\ No newline at end of file
diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsSharedVariablesManager.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsSharedVariablesManager.kt
index bc4a8336495..b13b06d6d1f 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsSharedVariablesManager.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsSharedVariablesManager.kt
@@ -36,7 +36,7 @@ import org.jetbrains.kotlin.ir.types.impl.IrSimpleTypeImpl
 import org.jetbrains.kotlin.ir.util.defaultType
 import org.jetbrains.kotlin.name.Name
 
-class JsSharedVariablesManager(val builtIns: IrBuiltIns, val implicitDeclarationsFile: IrFile) : SharedVariablesManager {
+class JsSharedVariablesManager(val builtIns: IrBuiltIns, val implicitDeclarationsFile: IrPackageFragment) : SharedVariablesManager {
 
     override fun declareSharedVariable(originalDeclaration: IrVariable): IrVariable {
         val valueType = originalDeclaration.type
diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/AutoboxingTransformer.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/AutoboxingTransformer.kt
index 91ca5d0717b..4dd202da6dc 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/AutoboxingTransformer.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/AutoboxingTransformer.kt
@@ -85,7 +85,7 @@ class AutoboxingTransformer(val context: JsIrBackendContext) : AbstractValueUsag
         if (actualType.isUnit() && !expectedType.isUnit()) {
             // Don't materialize Unit if value is known to be proper Unit on runtime
             if (!this.isGetUnit()) {
-                val unitValue = JsIrBuilder.buildGetObjectValue(actualType, context.symbolTable.referenceClass(context.builtIns.unit))
+                val unitValue = JsIrBuilder.buildGetObjectValue(actualType, context.irBuiltIns.unitClass)
                 return JsIrBuilder.buildComposite(actualType, listOf(this, unitValue))
             }
         }
diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/BlockDecomposerLowering.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/BlockDecomposerLowering.kt
index d7c6c489e43..e95be193448 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/BlockDecomposerLowering.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/BlockDecomposerLowering.kt
@@ -5,6 +5,7 @@
 
 package org.jetbrains.kotlin.ir.backend.js.lower
 
+import org.jetbrains.kotlin.backend.common.CommonBackendContext
 import org.jetbrains.kotlin.backend.common.DeclarationContainerLoweringPass
 import org.jetbrains.kotlin.backend.common.ir.isElseBranch
 import org.jetbrains.kotlin.ir.IrElement
@@ -21,9 +22,17 @@ import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
 import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
 import org.jetbrains.kotlin.utils.addIfNotNull
 
-class BlockDecomposerLowering(context: JsIrBackendContext) : DeclarationContainerLoweringPass {
+class JsBlockDecomposerLowering(val context: JsIrBackendContext) : AbstractBlockDecomposerLowering(context) {
+    override fun unreachableExpression(): IrExpression =
+        JsIrBuilder.buildCall(context.intrinsics.unreachable.symbol, context.irBuiltIns.nothingType)
+}
 
-    private val decomposerTransformer = BlockDecomposerTransformer(context)
+abstract class AbstractBlockDecomposerLowering(context: CommonBackendContext) : DeclarationContainerLoweringPass {
+
+    // Expression with Nothing type to be inserted in places of unreachable expression
+    abstract fun unreachableExpression(): IrExpression
+
+    private val decomposerTransformer = BlockDecomposerTransformer(context, ::unreachableExpression)
     private val nothingType = context.irBuiltIns.nothingType
 
     override fun lower(irDeclarationContainer: IrDeclarationContainer) {
@@ -80,7 +89,10 @@ class BlockDecomposerLowering(context: JsIrBackendContext) : DeclarationContaine
     }
 }
 
-class BlockDecomposerTransformer(private val context: JsIrBackendContext) : IrElementTransformerVoid() {
+class BlockDecomposerTransformer(
+    private val context: CommonBackendContext,
+    private val unreachableExpression: () -> IrExpression
+) : IrElementTransformerVoid() {
     private lateinit var function: IrFunction
     private var tmpVarCounter: Int = 0
 
@@ -92,9 +104,8 @@ class BlockDecomposerTransformer(private val context: JsIrBackendContext) : IrEl
     private val nothingType = context.irBuiltIns.nothingNType
 
     private val unitType = context.irBuiltIns.unitType
-    private val unitValue get() = JsIrBuilder.buildGetObjectValue(unitType, context.symbolTable.referenceClass(context.builtIns.unit))
+    private val unitValue get() = JsIrBuilder.buildGetObjectValue(unitType, context.irBuiltIns.unitClass)
 
-    private val unreachableFunction = context.intrinsics.unreachable
     private val booleanNotSymbol = context.irBuiltIns.booleanNotSymbol
 
     override fun visitFunction(declaration: IrFunction): IrStatement {
@@ -429,13 +440,13 @@ class BlockDecomposerTransformer(private val context: JsIrBackendContext) : IrEl
         override fun visitSetField(expression: IrSetField) = expression.asExpression(unitValue)
 
         override fun visitBreakContinue(jump: IrBreakContinue) =
-            jump.asExpression(JsIrBuilder.buildCall(unreachableFunction.symbol, nothingType))
+            jump.asExpression(unreachableExpression())
 
         override fun visitThrow(expression: IrThrow) =
-            expression.asExpression(JsIrBuilder.buildCall(unreachableFunction.symbol, nothingType))
+            expression.asExpression(unreachableExpression())
 
         override fun visitReturn(expression: IrReturn) =
-            expression.asExpression(JsIrBuilder.buildCall(unreachableFunction.symbol, nothingType))
+            expression.asExpression(unreachableExpression())
 
         override fun visitVariable(declaration: IrVariable) = declaration.asExpression(unitValue)
 
diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/BridgesConstruction.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/BridgesConstruction.kt
index 8eb224467e7..dd0e9c30f56 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/BridgesConstruction.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/BridgesConstruction.kt
@@ -6,6 +6,7 @@
 package org.jetbrains.kotlin.ir.backend.js.lower
 
 import org.jetbrains.kotlin.backend.common.ClassLoweringPass
+import org.jetbrains.kotlin.backend.common.CommonBackendContext
 import org.jetbrains.kotlin.backend.common.bridges.FunctionHandle
 import org.jetbrains.kotlin.backend.common.bridges.generateBridges
 import org.jetbrains.kotlin.backend.common.ir.copyTo
@@ -49,7 +50,7 @@ import org.jetbrains.kotlin.ir.util.*
 //            fun foo(t: Any?) = foo(t as Int)  // Constructed bridge
 //          }
 //
-class BridgesConstruction(val context: JsIrBackendContext) : ClassLoweringPass {
+class BridgesConstruction(val context: CommonBackendContext) : ClassLoweringPass {
 
     private val specialBridgeMethods = SpecialBridgeMethods(context)
 
diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/EnumClassLowering.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/EnumClassLowering.kt
index 8797a0b08de..c2ded075a6c 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/EnumClassLowering.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/EnumClassLowering.kt
@@ -5,6 +5,7 @@
 
 package org.jetbrains.kotlin.ir.backend.js.lower
 
+import org.jetbrains.kotlin.backend.common.CommonBackendContext
 import org.jetbrains.kotlin.backend.common.DeclarationContainerLoweringPass
 import org.jetbrains.kotlin.backend.common.FileLoweringPass
 import org.jetbrains.kotlin.backend.common.descriptors.WrappedClassConstructorDescriptor
@@ -101,7 +102,7 @@ private fun createEntryAccessorName(enumName: String, enumEntry: IrEnumEntry) =
 
 private fun IrEnumEntry.getType(irClass: IrClass) = (correspondingClass ?: irClass).defaultType
 
-class EnumClassConstructorLowering(val context: JsIrBackendContext) : DeclarationContainerLoweringPass {
+class EnumClassConstructorLowering(val context: CommonBackendContext) : DeclarationContainerLoweringPass {
     override fun lower(irDeclarationContainer: IrDeclarationContainer) {
         irDeclarationContainer.transformDeclarationsFlat { declaration ->
             if (declaration is IrClass && declaration.isEnumClass &&
@@ -113,7 +114,7 @@ class EnumClassConstructorLowering(val context: JsIrBackendContext) : Declaratio
     }
 }
 
-class EnumClassConstructorTransformer(val context: JsIrBackendContext, private val irClass: IrClass) {
+class EnumClassConstructorTransformer(val context: CommonBackendContext, private val irClass: IrClass) {
     private val builder = context.createIrBuilder(irClass.symbol)
     private val enumEntries = irClass.declarations.filterIsInstance<IrEnumEntry>()
     private val loweredEnumConstructors = HashMap<IrConstructorSymbol, IrConstructor>()
diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/ObjectLowering.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/ObjectLowering.kt
index 999e891eacc..3c6b1f27856 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/ObjectLowering.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/ObjectLowering.kt
@@ -5,6 +5,7 @@
 
 package org.jetbrains.kotlin.ir.backend.js.lower
 
+import org.jetbrains.kotlin.backend.common.CommonBackendContext
 import org.jetbrains.kotlin.backend.common.DeclarationContainerLoweringPass
 import org.jetbrains.kotlin.backend.common.FileLoweringPass
 import org.jetbrains.kotlin.backend.common.lower.createIrBuilder
@@ -19,9 +20,11 @@ import org.jetbrains.kotlin.ir.builders.declarations.buildField
 import org.jetbrains.kotlin.ir.declarations.IrClass
 import org.jetbrains.kotlin.ir.declarations.IrDeclarationContainer
 import org.jetbrains.kotlin.ir.declarations.IrFile
+import org.jetbrains.kotlin.ir.declarations.IrSimpleFunction
 import org.jetbrains.kotlin.ir.expressions.IrBlockBody
 import org.jetbrains.kotlin.ir.expressions.IrExpression
 import org.jetbrains.kotlin.ir.expressions.IrGetObjectValue
+import org.jetbrains.kotlin.ir.symbols.IrClassSymbol
 import org.jetbrains.kotlin.ir.types.makeNullable
 import org.jetbrains.kotlin.ir.util.defaultType
 import org.jetbrains.kotlin.ir.util.isEffectivelyExternal
@@ -31,13 +34,16 @@ import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
 import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
 import org.jetbrains.kotlin.name.Name
 
-class ObjectDeclarationLowering(val context: JsIrBackendContext) : DeclarationContainerLoweringPass {
+class ObjectDeclarationLowering(
+    val context: CommonBackendContext,
+    val objectToGetInstanceFunction: MutableMap<IrClassSymbol, IrSimpleFunction>
+) : DeclarationContainerLoweringPass {
     override fun lower(irDeclarationContainer: IrDeclarationContainer) {
         irDeclarationContainer.transformDeclarationsFlat { declaration ->
             if (declaration !is IrClass || declaration.kind != ClassKind.OBJECT || declaration.isEffectivelyExternal())
                 return@transformDeclarationsFlat null
 
-            val getInstanceFun = getOrCreateGetInstanceFunction(context, declaration)
+            val getInstanceFun = getOrCreateGetInstanceFunction(objectToGetInstanceFunction, declaration)
 
             val instanceField = buildField {
                 name = Name.identifier(declaration.name.asString() + "_instance")
@@ -70,20 +76,23 @@ class ObjectDeclarationLowering(val context: JsIrBackendContext) : DeclarationCo
     }
 }
 
-class ObjectUsageLowering(val context: JsIrBackendContext) : FileLoweringPass {
+class ObjectUsageLowering(
+    val context: CommonBackendContext,
+    val objectToGetInstanceFunction: MutableMap<IrClassSymbol, IrSimpleFunction>
+) : FileLoweringPass {
     override fun lower(irFile: IrFile) {
         irFile.transformChildrenVoid(object : IrElementTransformerVoid() {
             override fun visitGetObjectValue(expression: IrGetObjectValue): IrExpression {
                 val obj: IrClass = expression.symbol.owner
                 if (obj.isEffectivelyExternal()) return expression
-                return JsIrBuilder.buildCall(getOrCreateGetInstanceFunction(context, obj).symbol)
+                return JsIrBuilder.buildCall(getOrCreateGetInstanceFunction(objectToGetInstanceFunction, obj).symbol)
             }
         })
     }
 }
 
-fun getOrCreateGetInstanceFunction(context: JsIrBackendContext, obj: IrClass) =
-    context.objectToGetInstanceFunction.getOrPut(obj.symbol) {
+fun getOrCreateGetInstanceFunction(objectToGetInstanceFunction: MutableMap<IrClassSymbol, IrSimpleFunction>, obj: IrClass) =
+    objectToGetInstanceFunction.getOrPut(obj.symbol) {
         JsIrBuilder.buildFunction(
             obj.name.asString() + "_getInstance",
             returnType = obj.defaultType,
diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/StaticMembersLowering.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/StaticMembersLowering.kt
index 8c8a819741f..d420edf2f17 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/StaticMembersLowering.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/StaticMembersLowering.kt
@@ -5,6 +5,7 @@
 
 package org.jetbrains.kotlin.ir.backend.js.lower
 
+import org.jetbrains.kotlin.backend.common.CommonBackendContext
 import org.jetbrains.kotlin.backend.common.FileLoweringPass
 import org.jetbrains.kotlin.backend.common.ir.addChild
 import org.jetbrains.kotlin.ir.IrElement
@@ -17,7 +18,7 @@ import org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid
 import org.jetbrains.kotlin.ir.visitors.acceptChildrenVoid
 
 // Move static member declarations from classes to top level
-class StaticMembersLowering(val context: JsIrBackendContext) : FileLoweringPass {
+class StaticMembersLowering(val context: CommonBackendContext) : FileLoweringPass {
 
     override fun lower(irFile: IrFile) {
         val staticDeclarationsInClasses = mutableListOf<IrDeclaration>()
diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/inline/ReturnableBlockLowering.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/inline/ReturnableBlockLowering.kt
index f07a4888948..78ecc5c8187 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/inline/ReturnableBlockLowering.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/inline/ReturnableBlockLowering.kt
@@ -5,9 +5,9 @@
 
 package org.jetbrains.kotlin.ir.backend.js.lower.inline
 
+import org.jetbrains.kotlin.backend.common.CommonBackendContext
 import org.jetbrains.kotlin.backend.common.FileLoweringPass
 import org.jetbrains.kotlin.ir.IrStatement
-import org.jetbrains.kotlin.ir.backend.js.JsIrBackendContext
 import org.jetbrains.kotlin.ir.backend.js.ir.JsIrBuilder
 import org.jetbrains.kotlin.ir.declarations.IrDeclaration
 import org.jetbrains.kotlin.ir.declarations.IrDeclarationParent
@@ -69,7 +69,7 @@ import org.jetbrains.kotlin.ir.visitors.IrElementTransformer
  * }
  *
  */
-class ReturnableBlockLowering(val context: JsIrBackendContext) : FileLoweringPass {
+class ReturnableBlockLowering(val context: CommonBackendContext) : FileLoweringPass {
     override fun lower(irFile: IrFile) {
         irFile.transform(ReturnableBlockTransformer(context), ReturnableBlockLoweringContext(irFile))
     }
@@ -81,7 +81,7 @@ private class ReturnableBlockLoweringContext(val containingDeclaration: IrDeclar
 }
 
 private class ReturnableBlockTransformer(
-    val context: JsIrBackendContext
+    val context: CommonBackendContext
 ) : IrElementTransformer<ReturnableBlockLoweringContext> {
 
     override fun visitReturn(expression: IrReturn, data: ReturnableBlockLoweringContext): IrExpression {