JS IR: move declaration creation from IrBuilder to JsIrDeclarationBuilder

This is a temporary class until IrDeclarationFactory is there.

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsCommonBackendContext.kt

@@ -6,10 +6,13 @@
 package org.jetbrains.kotlin.ir.backend.js
 
 import org.jetbrains.kotlin.backend.common.CommonBackendContext
+import org.jetbrains.kotlin.ir.backend.js.ir.JsIrDeclarationBuilder
 
 interface JsCommonBackendContext : CommonBackendContext {
     override val mapping: JsMapping
 
+    val jsIrDeclarationBuilder: JsIrDeclarationBuilder
+
     val es6mode: Boolean
         get() = false
-}
+}

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsIrBackendContext.kt

@@ -8,7 +8,6 @@ package org.jetbrains.kotlin.ir.backend.js
 import org.jetbrains.kotlin.backend.common.atMostOne
 import org.jetbrains.kotlin.backend.common.ir.Ir
 import org.jetbrains.kotlin.backend.common.ir.Symbols
-import org.jetbrains.kotlin.ir.backend.js.lower.JsInnerClassesSupport
 import org.jetbrains.kotlin.builtins.PrimitiveType
 import org.jetbrains.kotlin.config.CompilerConfiguration
 import org.jetbrains.kotlin.descriptors.*
@@ -16,6 +15,8 @@ import org.jetbrains.kotlin.descriptors.impl.EmptyPackageFragmentDescriptor
 import org.jetbrains.kotlin.incremental.components.NoLookupLocation
 import org.jetbrains.kotlin.ir.*
 import org.jetbrains.kotlin.ir.backend.js.ir.JsIrBuilder
+import org.jetbrains.kotlin.ir.backend.js.ir.JsIrDeclarationBuilder
+import org.jetbrains.kotlin.ir.backend.js.lower.JsInnerClassesSupport
 import org.jetbrains.kotlin.ir.backend.js.utils.OperatorNames
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.declarations.impl.IrExternalPackageFragmentImpl
@@ -53,6 +54,8 @@ class JsIrBackendContext(
 
     override var inVerbosePhase: Boolean = false
 
+    override val jsIrDeclarationBuilder: JsIrDeclarationBuilder = JsIrDeclarationBuilder()
+
     val devMode = configuration[JSConfigurationKeys.DEVELOPER_MODE] ?: false
 
     val externalPackageFragment = mutableMapOf<IrFileSymbol, IrFile>()
@@ -123,7 +126,7 @@ class JsIrBackendContext(
     fun createTestContainerFun(module: IrModuleFragment): IrSimpleFunction {
         return testContainerFuns.getOrPut(module) {
             val file = syntheticFile("tests", module)
-            JsIrBuilder.buildFunction("test fun", irBuiltIns.unitType, file).apply {
+            jsIrDeclarationBuilder.buildFunction("test fun", irBuiltIns.unitType, file).apply {
                 body = JsIrBuilder.buildBlockBody(emptyList())
                 file.declarations += this
             }

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/ir/IrBuilder.kt

@@ -5,21 +5,16 @@
 
 package org.jetbrains.kotlin.ir.backend.js.ir
 
-import org.jetbrains.kotlin.descriptors.Modality
-import org.jetbrains.kotlin.descriptors.Visibilities
-import org.jetbrains.kotlin.descriptors.Visibility
 import org.jetbrains.kotlin.ir.IrStatement
 import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
-import org.jetbrains.kotlin.ir.builders.declarations.buildFun
-import org.jetbrains.kotlin.ir.builders.declarations.buildValueParameter
 import org.jetbrains.kotlin.ir.builders.declarations.buildVariable
-import org.jetbrains.kotlin.ir.declarations.*
-import org.jetbrains.kotlin.ir.declarations.impl.IrAnonymousInitializerImpl
-import org.jetbrains.kotlin.ir.descriptors.WrappedClassDescriptor
+import org.jetbrains.kotlin.ir.declarations.IrDeclarationOriginImpl
+import org.jetbrains.kotlin.ir.declarations.IrDeclarationParent
+import org.jetbrains.kotlin.ir.declarations.IrSimpleFunction
+import org.jetbrains.kotlin.ir.declarations.IrVariable
 import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.expressions.impl.*
 import org.jetbrains.kotlin.ir.symbols.*
-import org.jetbrains.kotlin.ir.symbols.impl.IrAnonymousInitializerSymbolImpl
 import org.jetbrains.kotlin.ir.types.IrType
 import org.jetbrains.kotlin.name.Name
 
@@ -51,80 +46,6 @@ object JsIrBuilder {
 
     fun buildThrow(type: IrType, value: IrExpression) = IrThrowImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET, type, value)
 
-    fun buildValueParameter(parent: IrDeclarationParent, name: String, index: Int, type: IrType): IrValueParameter =
-        buildValueParameter(parent) {
-            this.origin = SYNTHESIZED_DECLARATION
-            this.name = Name.identifier(name)
-            this.index = index
-            this.type = type
-        }
-
-    fun buildFunction(
-        name: String,
-        returnType: IrType,
-        parent: IrDeclarationParent,
-        visibility: Visibility = Visibilities.PUBLIC,
-        modality: Modality = Modality.FINAL,
-        isInline: Boolean = false,
-        isExternal: Boolean = false,
-        isTailrec: Boolean = false,
-        isSuspend: Boolean = false,
-        isExpect: Boolean = false,
-        isFakeOverride: Boolean = false,
-        origin: IrDeclarationOrigin = SYNTHESIZED_DECLARATION
-    ) = buildFunction(
-        Name.identifier(name),
-        returnType,
-        parent,
-        visibility,
-        modality,
-        isInline = isInline,
-        isExternal = isExternal,
-        isTailrec = isTailrec,
-        isSuspend = isSuspend,
-        isExpect = isExpect,
-        isFakeOverride = isFakeOverride,
-        origin = origin
-    )
-
-    fun buildFunction(
-        name: Name,
-        returnType: IrType,
-        parent: IrDeclarationParent,
-        visibility: Visibility = Visibilities.PUBLIC,
-        modality: Modality = Modality.FINAL,
-        isInline: Boolean = false,
-        isExternal: Boolean = false,
-        isTailrec: Boolean = false,
-        isSuspend: Boolean = false,
-        isExpect: Boolean = false,
-        isOperator: Boolean = false,
-        isInfix: Boolean = false,
-        isFakeOverride: Boolean = false,
-        origin: IrDeclarationOrigin = SYNTHESIZED_DECLARATION
-    ): IrSimpleFunction = buildFun {
-        this.origin = origin
-        this.name = name
-        this.visibility = visibility
-        this.modality = modality
-        this.returnType = returnType
-        this.isInline = isInline
-        this.isExternal = isExternal
-        this.isTailrec = isTailrec
-        this.isSuspend = isSuspend
-        this.isOperator = isOperator
-        this.isInfix = isInfix
-        this.isExpect = isExpect
-        this.isFakeOverride = isFakeOverride
-    }.also {
-        it.parent = parent
-    }
-
-    fun buildAnonymousInitializer() =
-        IrAnonymousInitializerImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET, SYNTHESIZED_DECLARATION, IrAnonymousInitializerSymbolImpl(
-            WrappedClassDescriptor()
-        ))
-
     fun buildGetObjectValue(type: IrType, classSymbol: IrClassSymbol) =
         IrGetObjectValueImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET, type, classSymbol)
 
@@ -232,4 +153,4 @@ object JsIrBuilder {
     fun buildString(type: IrType, s: String) = IrConstImpl.string(UNDEFINED_OFFSET, UNDEFINED_OFFSET, type, s)
     fun buildTry(type: IrType) = IrTryImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET, type)
     fun buildCatch(ex: IrVariable, block: IrBlockImpl) = IrCatchImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET, ex, block)
-}
+}

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/ir/JsIrDeclarationBuilder.kt

@@ -0,0 +1,84 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.ir.backend.js.ir
+
+import org.jetbrains.kotlin.descriptors.Modality
+import org.jetbrains.kotlin.descriptors.Visibilities
+import org.jetbrains.kotlin.descriptors.Visibility
+import org.jetbrains.kotlin.ir.builders.declarations.buildFun
+import org.jetbrains.kotlin.ir.builders.declarations.buildValueParameter
+import org.jetbrains.kotlin.ir.declarations.IrDeclarationOrigin
+import org.jetbrains.kotlin.ir.declarations.IrDeclarationParent
+import org.jetbrains.kotlin.ir.declarations.IrSimpleFunction
+import org.jetbrains.kotlin.ir.declarations.IrValueParameter
+import org.jetbrains.kotlin.ir.types.IrType
+import org.jetbrains.kotlin.name.Name
+
+// This is a temporary class for migration to IrDeclarationFactory. Usages should be refactored to use the factory directly once possible,
+// since it doesn't add sufficient value on its own.
+class JsIrDeclarationBuilder {
+    fun buildValueParameter(parent: IrDeclarationParent, name: String, index: Int, type: IrType): IrValueParameter =
+        buildValueParameter(parent) {
+            this.origin = JsIrBuilder.SYNTHESIZED_DECLARATION
+            this.name = Name.identifier(name)
+            this.index = index
+            this.type = type
+        }
+
+    fun buildFunction(
+        name: String,
+        returnType: IrType,
+        parent: IrDeclarationParent,
+        visibility: Visibility = Visibilities.PUBLIC,
+        modality: Modality = Modality.FINAL,
+        isInline: Boolean = false,
+        isExternal: Boolean = false,
+        isTailrec: Boolean = false,
+        isSuspend: Boolean = false,
+        isExpect: Boolean = false,
+        isOperator: Boolean = false,
+        isInfix: Boolean = false,
+        isFakeOverride: Boolean = false,
+        origin: IrDeclarationOrigin = JsIrBuilder.SYNTHESIZED_DECLARATION,
+    ): IrSimpleFunction =
+        buildFunction(
+            Name.identifier(name), returnType, parent, visibility, modality,
+            isInline, isExternal, isTailrec, isSuspend, isExpect, isOperator, isInfix, isFakeOverride, origin
+        )
+
+    fun buildFunction(
+        name: Name,
+        returnType: IrType,
+        parent: IrDeclarationParent,
+        visibility: Visibility = Visibilities.PUBLIC,
+        modality: Modality = Modality.FINAL,
+        isInline: Boolean = false,
+        isExternal: Boolean = false,
+        isTailrec: Boolean = false,
+        isSuspend: Boolean = false,
+        isExpect: Boolean = false,
+        isOperator: Boolean = false,
+        isInfix: Boolean = false,
+        isFakeOverride: Boolean = false,
+        origin: IrDeclarationOrigin = JsIrBuilder.SYNTHESIZED_DECLARATION,
+    ): IrSimpleFunction = buildFun {
+        this.origin = origin
+        this.name = name
+        this.visibility = visibility
+        this.modality = modality
+        this.returnType = returnType
+        this.isInline = isInline
+        this.isExternal = isExternal
+        this.isTailrec = isTailrec
+        this.isSuspend = isSuspend
+        this.isOperator = isOperator
+        this.isInfix = isInfix
+        this.isExpect = isExpect
+        this.isFakeOverride = isFakeOverride
+    }.also {
+        it.parent = parent
+    }
+}

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/BlockDecomposerLowering.kt

@@ -11,6 +11,7 @@ import org.jetbrains.kotlin.backend.common.ir.isElseBranch
 import org.jetbrains.kotlin.descriptors.Visibilities
 import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.IrStatement
+import org.jetbrains.kotlin.ir.backend.js.JsCommonBackendContext
 import org.jetbrains.kotlin.ir.backend.js.JsIrBackendContext
 import org.jetbrains.kotlin.ir.backend.js.ir.JsIrBuilder
 import org.jetbrains.kotlin.ir.backend.js.utils.isPure
@@ -18,7 +19,9 @@ import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.expressions.impl.*
 import org.jetbrains.kotlin.ir.types.IrType
-import org.jetbrains.kotlin.ir.util.*
+import org.jetbrains.kotlin.ir.util.dump
+import org.jetbrains.kotlin.ir.util.patchDeclarationParents
+import org.jetbrains.kotlin.ir.util.transformFlat
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformer
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
 import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
@@ -30,7 +33,7 @@ class JsBlockDecomposerLowering(val context: JsIrBackendContext) : AbstractBlock
 }
 
 abstract class AbstractBlockDecomposerLowering(
-    context: CommonBackendContext
+    private val context: JsCommonBackendContext
 ) : BodyLoweringPass {
 
     private val nothingType = context.irBuiltIns.nothingType
@@ -48,8 +51,7 @@ abstract class AbstractBlockDecomposerLowering(
             }
             is IrField -> {
                 container.initializer?.apply {
-
-                    val initFunction = JsIrBuilder.buildFunction(
+                    val initFunction = context.jsIrDeclarationBuilder.buildFunction(
                         container.name.asString() + "\$init\$",
                         container.type,
                         container.parent,

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/BridgesConstruction.kt

@@ -5,7 +5,6 @@
 
 package org.jetbrains.kotlin.ir.backend.js.lower
 
-import org.jetbrains.kotlin.backend.common.CommonBackendContext
 import org.jetbrains.kotlin.backend.common.DeclarationTransformer
 import org.jetbrains.kotlin.backend.common.bridges.FunctionHandle
 import org.jetbrains.kotlin.backend.common.bridges.generateBridges
@@ -14,8 +13,8 @@ import org.jetbrains.kotlin.backend.common.lower.*
 import org.jetbrains.kotlin.descriptors.Modality
 import org.jetbrains.kotlin.ir.ObsoleteDescriptorBasedAPI
 import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
+import org.jetbrains.kotlin.ir.backend.js.JsCommonBackendContext
 import org.jetbrains.kotlin.ir.backend.js.JsLoweredDeclarationOrigin
-import org.jetbrains.kotlin.ir.backend.js.ir.JsIrBuilder
 import org.jetbrains.kotlin.ir.backend.js.utils.functionSignature
 import org.jetbrains.kotlin.ir.backend.js.utils.getJsName
 import org.jetbrains.kotlin.ir.builders.*
@@ -46,7 +45,7 @@ import org.jetbrains.kotlin.ir.util.*
 //          }
 //
 @OptIn(ObsoleteDescriptorBasedAPI::class)
-class BridgesConstruction(val context: CommonBackendContext) : DeclarationTransformer {
+class BridgesConstruction(val context: JsCommonBackendContext) : DeclarationTransformer {
 
     private val specialBridgeMethods = SpecialBridgeMethods(context)
 
@@ -119,7 +118,7 @@ class BridgesConstruction(val context: CommonBackendContext) : DeclarationTransf
                 IrDeclarationOrigin.BRIDGE
 
         // TODO: Support offsets for debug info
-        val irFunction = JsIrBuilder.buildFunction(
+        val irFunction = context.jsIrDeclarationBuilder.buildFunction(
             bridge.name,
             bridge.returnType,
             function.parent,

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/ES6AddInternalParametersToConstructorPhase.kt

@@ -11,7 +11,7 @@ import org.jetbrains.kotlin.descriptors.Visibilities
 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.backend.js.lower.PrimaryConstructorLowering.*
+import org.jetbrains.kotlin.ir.backend.js.lower.PrimaryConstructorLowering.SYNTHETIC_PRIMARY_CONSTRUCTOR
 import org.jetbrains.kotlin.ir.builders.declarations.addValueParameter
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.expressions.*
@@ -103,7 +103,7 @@ class ES6AddInternalParametersToConstructorPhase(val context: JsIrBackendContext
     private fun buildInitFunction(constructor: IrConstructor, irClass: IrClass): IrSimpleFunction {
         val functionName = "${irClass.name}_init"
 
-        return JsIrBuilder.buildFunction(
+        return context.jsIrDeclarationBuilder.buildFunction(
             functionName,
             context.irBuiltIns.unitType,
             irClass,

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/ES6ConstructorLowering.kt

@@ -11,8 +11,9 @@ import org.jetbrains.kotlin.ir.IrStatement
 import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
 import org.jetbrains.kotlin.ir.backend.js.JsIrBackendContext
 import org.jetbrains.kotlin.ir.backend.js.ir.JsIrBuilder
-import org.jetbrains.kotlin.ir.backend.js.lower.ES6AddInternalParametersToConstructorPhase.*
-import org.jetbrains.kotlin.ir.backend.js.lower.PrimaryConstructorLowering.*
+import org.jetbrains.kotlin.ir.backend.js.lower.ES6AddInternalParametersToConstructorPhase.ES6_INIT_BOX_PARAMETER
+import org.jetbrains.kotlin.ir.backend.js.lower.ES6AddInternalParametersToConstructorPhase.ES6_RESULT_TYPE_PARAMETER
+import org.jetbrains.kotlin.ir.backend.js.lower.PrimaryConstructorLowering.SYNTHETIC_PRIMARY_CONSTRUCTOR
 import org.jetbrains.kotlin.ir.builders.declarations.addValueParameter
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.expressions.*
@@ -538,7 +539,7 @@ private fun getSuperCall(constructor: IrConstructor): IrDelegatingConstructorCal
 }
 
 private fun changeIrConstructorToIrFunction(context: JsIrBackendContext, container: IrConstructor) {
-    val newConstructor = JsIrBuilder.buildFunction(
+    val newConstructor = context.jsIrDeclarationBuilder.buildFunction(
         "${container.parentAsClass.name}_constructor",
         container.returnType,
         container.parent

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/EnumClassLowering.kt

@@ -19,6 +19,7 @@ import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
 import org.jetbrains.kotlin.ir.backend.js.JsCommonBackendContext
 import org.jetbrains.kotlin.ir.backend.js.JsIrBackendContext
 import org.jetbrains.kotlin.ir.backend.js.ir.JsIrBuilder
+import org.jetbrains.kotlin.ir.backend.js.ir.JsIrDeclarationBuilder
 import org.jetbrains.kotlin.ir.backend.js.utils.toJsArrayLiteral
 import org.jetbrains.kotlin.ir.builders.*
 import org.jetbrains.kotlin.ir.builders.declarations.buildConstructor
@@ -121,8 +122,8 @@ class EnumClassConstructorLowering(val context: JsCommonBackendContext) : Declar
             returnType = enumConstructor.returnType
         }.apply {
             parent = enumClass
-            valueParameters += JsIrBuilder.buildValueParameter(this, "name", 0, context.irBuiltIns.stringType)
-            valueParameters += JsIrBuilder.buildValueParameter(this, "ordinal", 1, context.irBuiltIns.intType)
+            valueParameters += context.jsIrDeclarationBuilder.buildValueParameter(this, "name", 0, context.irBuiltIns.stringType)
+            valueParameters += context.jsIrDeclarationBuilder.buildValueParameter(this, "ordinal", 1, context.irBuiltIns.intType)
             copyParameterDeclarationsFrom(enumConstructor)
 
             val newConstructor = this
@@ -399,7 +400,7 @@ class EnumClassCreateInitializerLowering(val context: JsIrBackendContext) : Decl
     }
 
     private fun createInitEntryInstancesFun(irClass: IrClass, entryInstancesInitializedField: IrField): IrSimpleFunction =
-        buildFunction(irClass, "${irClass.name.identifier}_initEntries", context.irBuiltIns.unitType).also {
+        context.jsIrDeclarationBuilder.buildFunction(irClass, "${irClass.name.identifier}_initEntries", context.irBuiltIns.unitType).also {
             it.body = IrBlockBodyImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET) {
                 statements += context.createIrBuilder(it.symbol).irBlockBody(it) {
                     +irIfThen(irGetField(null, entryInstancesInitializedField), irReturnUnit())
@@ -415,11 +416,11 @@ class EnumClassCreateInitializerLowering(val context: JsIrBackendContext) : Decl
         }
 }
 
-private fun buildFunction(
+private fun JsIrDeclarationBuilder.buildFunction(
     irClass: IrClass,
     name: String,
     returnType: IrType
-) = JsIrBuilder.buildFunction(name, returnType, irClass)
+): IrSimpleFunction = buildFunction(name, returnType, irClass)
 
 class EnumEntryCreateGetInstancesFunsLowering(val context: JsIrBackendContext): DeclarationTransformer {
 
@@ -446,18 +447,23 @@ class EnumEntryCreateGetInstancesFunsLowering(val context: JsIrBackendContext):
         return null
     }
 
-    private fun createGetEntryInstanceFun(irClass: IrClass, enumEntry: IrEnumEntry, initEntryInstancesFun: IrSimpleFunction): IrSimpleFunction {
-
-        return context.mapping.enumEntryToGetInstanceFun.getOrPut(enumEntry) { buildFunction(irClass, createEntryAccessorName(irClass.name.identifier, enumEntry), enumEntry.getType(irClass)) }
-            .also {
-                it.body = IrBlockBodyImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET) {
-                    statements += context.createIrBuilder(it.symbol).irBlockBody(it) {
-                        +irCall(initEntryInstancesFun)
-                        +irReturn(irGetField(null, enumEntry.correspondingField!!))
-                    }.statements
-                }
+    private fun createGetEntryInstanceFun(
+        irClass: IrClass, enumEntry: IrEnumEntry, initEntryInstancesFun: IrSimpleFunction
+    ): IrSimpleFunction =
+        context.mapping.enumEntryToGetInstanceFun.getOrPut(enumEntry) {
+            context.jsIrDeclarationBuilder.buildFunction(
+                irClass,
+                createEntryAccessorName(irClass.name.identifier, enumEntry),
+                enumEntry.getType(irClass)
+            )
+        }.also {
+            it.body = IrBlockBodyImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET) {
+                statements += context.createIrBuilder(it.symbol).irBlockBody(it) {
+                    +irCall(initEntryInstancesFun)
+                    +irReturn(irGetField(null, enumEntry.correspondingField!!))
+                }.statements
             }
-    }
+        }
 }
 
 class EnumSyntheticFunctionsLowering(val context: JsIrBackendContext): DeclarationTransformer {

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/JsInnerClassesSupport.kt

@@ -12,10 +12,11 @@ import org.jetbrains.kotlin.backend.common.ir.copyTypeParametersFrom
 import org.jetbrains.kotlin.descriptors.Visibilities
 import org.jetbrains.kotlin.ir.ObsoleteDescriptorBasedAPI
 import org.jetbrains.kotlin.ir.backend.js.JsMapping
-import org.jetbrains.kotlin.ir.backend.js.ir.JsIrBuilder
+import org.jetbrains.kotlin.ir.backend.js.ir.JsIrBuilder.SYNTHESIZED_DECLARATION
 import org.jetbrains.kotlin.ir.backend.js.utils.Namer
 import org.jetbrains.kotlin.ir.builders.declarations.buildConstructor
 import org.jetbrains.kotlin.ir.builders.declarations.buildField
+import org.jetbrains.kotlin.ir.builders.declarations.buildValueParameter
 import org.jetbrains.kotlin.ir.declarations.IrClass
 import org.jetbrains.kotlin.ir.declarations.IrConstructor
 import org.jetbrains.kotlin.ir.declarations.IrField
@@ -82,9 +83,12 @@ class JsInnerClassesSupport(mapping: JsMapping) : InnerClassesSupport {
 
         newConstructor.copyTypeParametersFrom(oldConstructor)
 
-        val outerThisValueParameter = JsIrBuilder.buildValueParameter(newConstructor, Namer.OUTER_NAME, 0, outerThisType)
-
-        val newValueParameters = mutableListOf(outerThisValueParameter)
+        val newValueParameters = mutableListOf(buildValueParameter(newConstructor) {
+            origin = SYNTHESIZED_DECLARATION
+            name = Name.identifier(Namer.OUTER_NAME)
+            index = 0
+            type = outerThisType
+        })
 
         for (p in oldConstructor.valueParameters) {
             newValueParameters += p.copyTo(newConstructor, index = p.index + 1)

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/ObjectLowering.kt

@@ -106,11 +106,11 @@ class ObjectUsageLowering(
     }
 }
 
-fun JsCommonBackendContext.getOrCreateGetInstanceFunction(obj: IrClass) =
+private fun JsCommonBackendContext.getOrCreateGetInstanceFunction(obj: IrClass) =
     mapping.objectToGetInstanceFunction.getOrPut(obj) {
-        JsIrBuilder.buildFunction(
+        jsIrDeclarationBuilder.buildFunction(
             obj.name.asString() + "_getInstance",
             returnType = obj.defaultType,
             parent = obj.parent
         )
-    }
+    }

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/SecondaryCtorLowering.kt

@@ -159,12 +159,12 @@ class SecondaryConstructorLowering(val context: JsIrBackendContext) : Declaratio
 
 private fun IrTypeParameter.toIrType() = IrSimpleTypeImpl(symbol, true, emptyList(), emptyList())
 
-private fun buildInitDeclaration(constructor: IrConstructor, irClass: IrClass): IrSimpleFunction {
+private fun JsIrBackendContext.buildInitDeclaration(constructor: IrConstructor, irClass: IrClass): IrSimpleFunction {
     val type = irClass.defaultType
     val constructorName = "${irClass.name}_init"
     val functionName = "${constructorName}_\$Init\$"
 
-    return JsIrBuilder.buildFunction(
+    return jsIrDeclarationBuilder.buildFunction(
         functionName,
         type,
         constructor.parent,
@@ -176,16 +176,16 @@ private fun buildInitDeclaration(constructor: IrConstructor, irClass: IrClass):
         it.copyTypeParametersFrom(constructor.parentAsClass)
 
         it.valueParameters = constructor.valueParameters.map { p -> p.copyTo(it) }
-        it.valueParameters += JsIrBuilder.buildValueParameter(it, "\$this", constructor.valueParameters.size, type)
+        it.valueParameters += jsIrDeclarationBuilder.buildValueParameter(it, "\$this", constructor.valueParameters.size, type)
     }
 }
 
-private fun buildFactoryDeclaration(constructor: IrConstructor, irClass: IrClass): IrSimpleFunction {
+private fun JsIrBackendContext.buildFactoryDeclaration(constructor: IrConstructor, irClass: IrClass): IrSimpleFunction {
     val type = irClass.defaultType
     val constructorName = "${irClass.name}_init"
     val functionName = "${constructorName}_\$Create\$"
 
-    return JsIrBuilder.buildFunction(
+    return jsIrDeclarationBuilder.buildFunction(
         functionName,
         type,
         constructor.parent,

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/TestGenerator.kt

@@ -56,7 +56,7 @@ class TestGenerator(val context: JsIrBackendContext, val testContainerFactory: (
     ): FunctionWithBody {
         val body = JsIrBuilder.buildBlockBody(emptyList())
 
-        val function = JsIrBuilder.buildFunction("$name test fun", context.irBuiltIns.anyNType, parentFunction)
+        val function = context.jsIrDeclarationBuilder.buildFunction("$name test fun", context.irBuiltIns.anyNType, parentFunction)
         function.body = body
 
         val parentBody = parentFunction.body as IrBlockBody

compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/WasmBackendContext.kt

@@ -7,15 +7,16 @@ package org.jetbrains.kotlin.backend.wasm
 
 import org.jetbrains.kotlin.backend.common.ir.Ir
 import org.jetbrains.kotlin.backend.common.ir.Symbols
-import org.jetbrains.kotlin.ir.backend.js.lower.JsInnerClassesSupport
 import org.jetbrains.kotlin.config.CompilerConfiguration
 import org.jetbrains.kotlin.descriptors.ModuleDescriptor
 import org.jetbrains.kotlin.descriptors.PackageFragmentDescriptor
-import org.jetbrains.kotlin.ir.ObsoleteDescriptorBasedAPI
 import org.jetbrains.kotlin.ir.IrElement
+import org.jetbrains.kotlin.ir.ObsoleteDescriptorBasedAPI
 import org.jetbrains.kotlin.ir.backend.js.JsCommonBackendContext
 import org.jetbrains.kotlin.ir.backend.js.JsMapping
 import org.jetbrains.kotlin.ir.backend.js.JsSharedVariablesManager
+import org.jetbrains.kotlin.ir.backend.js.ir.JsIrDeclarationBuilder
+import org.jetbrains.kotlin.ir.backend.js.lower.JsInnerClassesSupport
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.declarations.impl.IrExternalPackageFragmentImpl
 import org.jetbrains.kotlin.ir.descriptors.IrBuiltIns
@@ -41,6 +42,7 @@ class WasmBackendContext(
     override val transformedFunction = mutableMapOf<IrFunctionSymbol, IrSimpleFunctionSymbol>()
     override val lateinitNullableFields = mutableMapOf<IrField, IrField>()
     override val extractedLocalClasses: MutableSet<IrClass> = hashSetOf()
+    override val jsIrDeclarationBuilder: JsIrDeclarationBuilder = JsIrDeclarationBuilder()
 
     // Place to store declarations excluded from code generation
     val excludedDeclarations: IrPackageFragment by lazy {