diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/inlineclasses/InlineClassAbi.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/InlineClassAbi.kt
similarity index 98%
rename from compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/inlineclasses/InlineClassAbi.kt
rename to compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/InlineClassAbi.kt
index 76d1b6ceca7..5bfab9a496c 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/inlineclasses/InlineClassAbi.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/InlineClassAbi.kt
@@ -1,9 +1,9 @@
 /*
- * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2021 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.backend.jvm.lower.inlineclasses
+package org.jetbrains.kotlin.backend.jvm
 
 import org.jetbrains.kotlin.backend.jvm.ir.erasedUpperBound
 import org.jetbrains.kotlin.backend.jvm.ir.isInlineClassType
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmBackendContext.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmBackendContext.kt
index 1d1caa6ccf3..d92cf7e086c 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmBackendContext.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmBackendContext.kt
@@ -11,14 +11,13 @@ import org.jetbrains.kotlin.backend.common.Mapping
 import org.jetbrains.kotlin.backend.common.ir.Ir
 import org.jetbrains.kotlin.backend.common.phaser.PhaseConfig
 import org.jetbrains.kotlin.backend.common.psi.PsiErrorBuilder
-import org.jetbrains.kotlin.backend.jvm.codegen.*
-import org.jetbrains.kotlin.backend.jvm.descriptors.JvmSharedVariablesManager
+import org.jetbrains.kotlin.backend.jvm.codegen.ClassCodegen
+import org.jetbrains.kotlin.backend.jvm.codegen.IrTypeMapper
+import org.jetbrains.kotlin.backend.jvm.codegen.MethodSignatureMapper
+import org.jetbrains.kotlin.backend.jvm.codegen.createFakeContinuation
 import org.jetbrains.kotlin.backend.jvm.intrinsics.IrIntrinsicMethods
 import org.jetbrains.kotlin.backend.jvm.lower.BridgeLowering
 import org.jetbrains.kotlin.backend.jvm.lower.CollectionStubComputer
-import org.jetbrains.kotlin.backend.jvm.lower.JvmInnerClassesSupport
-import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.InlineClassAbi
-import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.MemoizedInlineClassReplacements
 import org.jetbrains.kotlin.codegen.state.GenerationState
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.descriptors.TypeParameterDescriptor
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmInnerClassesSupport.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmInnerClassesSupport.kt
similarity index 95%
rename from compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmInnerClassesSupport.kt
rename to compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmInnerClassesSupport.kt
index 2e3673046a1..5509195e3b7 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmInnerClassesSupport.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmInnerClassesSupport.kt
@@ -1,15 +1,14 @@
 /*
- * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2021 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.backend.jvm.lower
+package org.jetbrains.kotlin.backend.jvm
 
 import org.jetbrains.kotlin.backend.common.ir.copyAnnotationsFrom
 import org.jetbrains.kotlin.backend.common.ir.copyTo
 import org.jetbrains.kotlin.backend.common.ir.copyTypeParametersFrom
 import org.jetbrains.kotlin.backend.common.lower.InnerClassesSupport
-import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
 import org.jetbrains.kotlin.codegen.AsmUtil
 import org.jetbrains.kotlin.ir.builders.declarations.buildConstructor
 import org.jetbrains.kotlin.ir.builders.declarations.buildField
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmLower.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmLower.kt
index 4aeee9c2403..e43d1e54c46 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmLower.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmLower.kt
@@ -13,6 +13,7 @@ import org.jetbrains.kotlin.backend.common.lower.optimizations.foldConstantLower
 import org.jetbrains.kotlin.backend.common.phaser.*
 import org.jetbrains.kotlin.backend.jvm.codegen.ClassCodegen
 import org.jetbrains.kotlin.backend.jvm.codegen.shouldContainSuspendMarkers
+import org.jetbrains.kotlin.backend.jvm.ir.constantValue
 import org.jetbrains.kotlin.backend.jvm.lower.*
 import org.jetbrains.kotlin.descriptors.DescriptorVisibilities
 import org.jetbrains.kotlin.descriptors.DescriptorVisibility
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/descriptors/SharedVariablesManager.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmSharedVariablesManager.kt
similarity index 95%
rename from compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/descriptors/SharedVariablesManager.kt
rename to compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmSharedVariablesManager.kt
index 7c0c4ed00e5..167991a1c22 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/descriptors/SharedVariablesManager.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmSharedVariablesManager.kt
@@ -1,14 +1,12 @@
 /*
- * Copyright 2010-2018 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2021 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.backend.jvm.descriptors
+package org.jetbrains.kotlin.backend.jvm
 
 import org.jetbrains.kotlin.backend.common.ir.SharedVariablesManager
 import org.jetbrains.kotlin.backend.common.ir.createImplicitParameterDeclarationWithWrappedDescriptor
-import org.jetbrains.kotlin.backend.jvm.JvmSymbols
-import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.InlineClassAbi
 import org.jetbrains.kotlin.descriptors.ModuleDescriptor
 import org.jetbrains.kotlin.ir.IrBuiltIns
 import org.jetbrains.kotlin.ir.IrStatement
@@ -112,7 +110,7 @@ class JvmSharedVariablesManager(
             // The field is preinitialized to the default value, so an explicit set is not required.
             return sharedVariableDeclaration
         }
-        val initializationStatement = with (originalDeclaration) {
+        val initializationStatement = with(originalDeclaration) {
             IrSetValueImpl(startOffset, endOffset, irBuiltIns.unitType, symbol, initializer, null)
         }
         val sharedVariableInitialization = setSharedValue(sharedVariableDeclaration.symbol, initializationStatement)
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/inlineclasses/MemoizedInlineClassReplacements.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/MemoizedInlineClassReplacements.kt
similarity index 97%
rename from compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/inlineclasses/MemoizedInlineClassReplacements.kt
rename to compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/MemoizedInlineClassReplacements.kt
index fb03018cd91..805c6c8ebf7 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/inlineclasses/MemoizedInlineClassReplacements.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/MemoizedInlineClassReplacements.kt
@@ -1,22 +1,19 @@
 /*
- * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2021 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.backend.jvm.lower.inlineclasses
+package org.jetbrains.kotlin.backend.jvm
 
 import org.jetbrains.kotlin.backend.common.ir.copyTo
 import org.jetbrains.kotlin.backend.common.ir.copyTypeParameters
 import org.jetbrains.kotlin.backend.common.ir.copyTypeParametersFrom
 import org.jetbrains.kotlin.backend.common.ir.createDispatchReceiverParameter
-import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
-import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
 import org.jetbrains.kotlin.backend.jvm.codegen.classFileContainsMethod
 import org.jetbrains.kotlin.backend.jvm.codegen.isJvmInterface
 import org.jetbrains.kotlin.backend.jvm.codegen.parentClassId
 import org.jetbrains.kotlin.backend.jvm.ir.isCompiledToJvmDefault
 import org.jetbrains.kotlin.backend.jvm.ir.isStaticInlineClassReplacement
-import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.InlineClassAbi.mangledNameFor
 import org.jetbrains.kotlin.codegen.state.KotlinTypeMapper
 import org.jetbrains.kotlin.descriptors.DescriptorVisibilities
 import org.jetbrains.kotlin.descriptors.Modality
@@ -270,7 +267,7 @@ class MemoizedInlineClassReplacements(
         if (noFakeOverride) {
             isFakeOverride = false
         }
-        name = mangledNameFor(function, mangleReturnTypes, useOldManglingScheme)
+        name = InlineClassAbi.mangledNameFor(function, mangleReturnTypes, useOldManglingScheme)
         returnType = function.returnType
     }.apply {
         parent = function.parent
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/MultifileFacades.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/MultifileFacades.kt
new file mode 100644
index 00000000000..ce2c27920b3
--- /dev/null
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/MultifileFacades.kt
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2010-2021 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.backend.jvm
+
+import org.jetbrains.kotlin.ir.IrFileEntry
+import org.jetbrains.kotlin.ir.SourceRangeInfo
+import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
+import org.jetbrains.kotlin.ir.declarations.IrClass
+import org.jetbrains.kotlin.ir.declarations.IrDeclarationOrigin
+import org.jetbrains.kotlin.ir.declarations.IrFile
+import org.jetbrains.kotlin.ir.declarations.IrFunction
+import org.jetbrains.kotlin.resolve.jvm.JvmClassName
+
+class MultifileFacadeFileEntry(
+    private val className: JvmClassName,
+    val partFiles: List<IrFile>
+) : IrFileEntry {
+    override val name: String
+        get() = "<multi-file facade $className>"
+
+    override val maxOffset: Int
+        get() = UNDEFINED_OFFSET
+
+    override fun getSourceRangeInfo(beginOffset: Int, endOffset: Int): SourceRangeInfo =
+        error("Multifile facade doesn't support debug info: $className")
+
+    override fun getLineNumber(offset: Int): Int =
+        error("Multifile facade doesn't support debug info: $className")
+
+    override fun getColumnNumber(offset: Int): Int =
+        error("Multifile facade doesn't support debug info: $className")
+}
+
+fun IrFunction.isMultifileBridge(): Boolean =
+    (parent as? IrClass)?.origin == IrDeclarationOrigin.JVM_MULTIFILE_CLASS
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ClassCodegen.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ClassCodegen.kt
index adefb34db23..27a06b109fa 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ClassCodegen.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ClassCodegen.kt
@@ -9,14 +9,13 @@ import org.jetbrains.kotlin.backend.common.lower.ANNOTATION_IMPLEMENTATION
 import org.jetbrains.kotlin.backend.common.psi.PsiSourceManager
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
 import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
-import org.jetbrains.kotlin.backend.jvm.ir.isInPublicInlineScope
-import org.jetbrains.kotlin.backend.jvm.ir.isSyntheticSingleton
-import org.jetbrains.kotlin.backend.jvm.lower.MultifileFacadeFileEntry
-import org.jetbrains.kotlin.backend.jvm.lower.buildAssertionsDisabledField
-import org.jetbrains.kotlin.backend.jvm.lower.hasAssertionsDisabledField
-import org.jetbrains.kotlin.backend.jvm.lower.isReifiedTypeParameter
-import org.jetbrains.kotlin.codegen.*
+import org.jetbrains.kotlin.backend.jvm.MultifileFacadeFileEntry
+import org.jetbrains.kotlin.backend.jvm.ir.*
+import org.jetbrains.kotlin.codegen.DescriptorAsmUtil
+import org.jetbrains.kotlin.codegen.VersionIndependentOpcodes
+import org.jetbrains.kotlin.codegen.addRecordComponent
 import org.jetbrains.kotlin.codegen.inline.*
+import org.jetbrains.kotlin.codegen.writeKotlinMetadata
 import org.jetbrains.kotlin.config.JvmAnalysisFlags
 import org.jetbrains.kotlin.config.LanguageFeature
 import org.jetbrains.kotlin.config.LanguageVersionSettings
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/CoroutineCodegen.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/CoroutineCodegen.kt
index 9d2983c3851..e1024ff616f 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/CoroutineCodegen.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/CoroutineCodegen.kt
@@ -8,14 +8,10 @@ package org.jetbrains.kotlin.backend.jvm.codegen
 import org.jetbrains.kotlin.backend.common.CodegenUtil
 import org.jetbrains.kotlin.backend.common.ir.allOverridden
 import org.jetbrains.kotlin.backend.common.lower.LocalDeclarationsLowering
-import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
-import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
+import org.jetbrains.kotlin.backend.jvm.*
 import org.jetbrains.kotlin.backend.jvm.ir.erasedUpperBound
 import org.jetbrains.kotlin.backend.jvm.ir.isStaticInlineClassReplacement
-import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.InlineClassAbi
-import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.unboxInlineClass
-import org.jetbrains.kotlin.backend.jvm.lower.isMultifileBridge
-import org.jetbrains.kotlin.backend.jvm.lower.suspendFunctionOriginal
+import org.jetbrains.kotlin.backend.jvm.ir.suspendFunctionOriginal
 import org.jetbrains.kotlin.codegen.ClassBuilder
 import org.jetbrains.kotlin.codegen.coroutines.CoroutineTransformerMethodVisitor
 import org.jetbrains.kotlin.codegen.coroutines.INVOKE_SUSPEND_METHOD_NAME
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ExpressionCodegen.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ExpressionCodegen.kt
index 973b868b275..634b28e2cb5 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ExpressionCodegen.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/ExpressionCodegen.kt
@@ -7,16 +7,12 @@ package org.jetbrains.kotlin.backend.jvm.codegen
 
 import org.jetbrains.kotlin.backend.common.lower.BOUND_RECEIVER_PARAMETER
 import org.jetbrains.kotlin.backend.common.lower.LoweredStatementOrigins
-import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
-import org.jetbrains.kotlin.backend.jvm.JvmLoweredStatementOrigin
+import org.jetbrains.kotlin.backend.jvm.*
 import org.jetbrains.kotlin.backend.jvm.intrinsics.IrIntrinsicMethods
 import org.jetbrains.kotlin.backend.jvm.intrinsics.JavaClassProperty
+import org.jetbrains.kotlin.backend.jvm.ir.constantValue
 import org.jetbrains.kotlin.backend.jvm.ir.eraseTypeParameters
 import org.jetbrains.kotlin.backend.jvm.ir.isInlineClassType
-import org.jetbrains.kotlin.backend.jvm.lower.MultifileFacadeFileEntry
-import org.jetbrains.kotlin.backend.jvm.lower.constantValue
-import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.unboxInlineClass
-import org.jetbrains.kotlin.backend.jvm.lower.isMultifileBridge
 import org.jetbrains.kotlin.builtins.StandardNames
 import org.jetbrains.kotlin.codegen.*
 import org.jetbrains.kotlin.codegen.AsmUtil.*
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/FunctionCodegen.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/FunctionCodegen.kt
index 1224f60c68c..fb75c60c834 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/FunctionCodegen.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/FunctionCodegen.kt
@@ -11,7 +11,7 @@ import org.jetbrains.kotlin.backend.common.lower.BOUND_RECEIVER_PARAMETER
 import org.jetbrains.kotlin.backend.common.lower.BOUND_VALUE_PARAMETER
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
 import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
-import org.jetbrains.kotlin.backend.jvm.lower.suspendFunctionOriginal
+import org.jetbrains.kotlin.backend.jvm.ir.suspendFunctionOriginal
 import org.jetbrains.kotlin.codegen.AsmUtil
 import org.jetbrains.kotlin.codegen.inline.*
 import org.jetbrains.kotlin.codegen.mangleNameIfNeeded
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/IrInlineCallGenerator.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/IrInlineCallGenerator.kt
index 7c6fcedbf75..20b46ed933b 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/IrInlineCallGenerator.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/IrInlineCallGenerator.kt
@@ -6,7 +6,7 @@
 package org.jetbrains.kotlin.backend.jvm.codegen
 
 import org.jetbrains.kotlin.backend.common.psi.PsiSourceManager
-import org.jetbrains.kotlin.backend.jvm.lower.suspendFunctionOriginal
+import org.jetbrains.kotlin.backend.jvm.ir.suspendFunctionOriginal
 import org.jetbrains.kotlin.codegen.AsmUtil
 import org.jetbrains.kotlin.ir.descriptors.toIrBasedDescriptor
 import org.jetbrains.kotlin.ir.expressions.IrFunctionAccessExpression
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/IrInlineIntrinsicsSupport.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/IrInlineIntrinsicsSupport.kt
index 2b0ea5060c4..78a060d991e 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/IrInlineIntrinsicsSupport.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/IrInlineIntrinsicsSupport.kt
@@ -9,7 +9,8 @@ import org.jetbrains.kotlin.backend.common.ir.allParametersCount
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
 import org.jetbrains.kotlin.backend.jvm.JvmSymbols
 import org.jetbrains.kotlin.backend.jvm.intrinsics.SignatureString
-import org.jetbrains.kotlin.backend.jvm.lower.FunctionReferenceLowering
+import org.jetbrains.kotlin.backend.jvm.ir.getCallableReferenceOwnerKClassType
+import org.jetbrains.kotlin.backend.jvm.ir.getCallableReferenceTopLevelFlag
 import org.jetbrains.kotlin.builtins.StandardNames
 import org.jetbrains.kotlin.builtins.jvm.JavaToKotlinClassMap
 import org.jetbrains.kotlin.codegen.AsmUtil
@@ -92,11 +93,11 @@ class IrInlineIntrinsicsSupport(
         if (withArity) {
             v.iconst(function.allParametersCount)
         }
-        putClassInstance(v, FunctionReferenceLowering.getOwnerKClassType(declaration.parent, context))
+        putClassInstance(v, declaration.parent.getCallableReferenceOwnerKClassType(context))
         v.aconst(declaration.name.asString())
         // TODO: generate correct signature for functions and property accessors which have inline class types in the signature.
         SignatureString.generateSignatureString(v, function, context)
-        v.iconst(FunctionReferenceLowering.getCallableReferenceTopLevelFlag(declaration))
+        v.iconst(declaration.getCallableReferenceTopLevelFlag())
         val parameterTypes =
             (if (withArity) listOf(INT_TYPE) else emptyList()) +
                     listOf(JAVA_CLASS_TYPE, JAVA_STRING_TYPE, JAVA_STRING_TYPE, INT_TYPE)
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/IrSourceCompilerForInline.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/IrSourceCompilerForInline.kt
index 4407e236821..46c4a8ca180 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/IrSourceCompilerForInline.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/IrSourceCompilerForInline.kt
@@ -8,9 +8,9 @@ package org.jetbrains.kotlin.backend.jvm.codegen
 import com.intellij.openapi.util.TextRange
 import org.jetbrains.kotlin.backend.common.CodegenUtil
 import org.jetbrains.kotlin.backend.common.ir.ir2string
+import org.jetbrains.kotlin.backend.jvm.hasMangledReturnType
 import org.jetbrains.kotlin.backend.jvm.ir.getKtFile
 import org.jetbrains.kotlin.backend.jvm.ir.inlineScopeVisibility
-import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.hasMangledReturnType
 import org.jetbrains.kotlin.codegen.inline.*
 import org.jetbrains.kotlin.codegen.state.GenerationState
 import org.jetbrains.kotlin.diagnostics.DiagnosticUtils
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/MethodSignatureMapper.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/MethodSignatureMapper.kt
index e35c7979419..bc55ebf98b1 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/MethodSignatureMapper.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/MethodSignatureMapper.kt
@@ -12,8 +12,7 @@ import org.jetbrains.kotlin.backend.common.lower.parentsWithSelf
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
 import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
 import org.jetbrains.kotlin.backend.jvm.ir.*
-import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.unboxInlineClass
-import org.jetbrains.kotlin.backend.jvm.lower.suspendFunctionOriginal
+import org.jetbrains.kotlin.backend.jvm.unboxInlineClass
 import org.jetbrains.kotlin.builtins.StandardNames
 import org.jetbrains.kotlin.builtins.jvm.JavaToKotlinClassMap
 import org.jetbrains.kotlin.codegen.JvmCodegenUtil
@@ -27,12 +26,12 @@ import org.jetbrains.kotlin.descriptors.DescriptorVisibilities
 import org.jetbrains.kotlin.descriptors.FunctionDescriptor
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.declarations.lazy.IrLazyClass
-import org.jetbrains.kotlin.ir.declarations.lazy.IrLazyFunction
 import org.jetbrains.kotlin.ir.declarations.lazy.IrLazyFunctionBase
 import org.jetbrains.kotlin.ir.declarations.lazy.IrMaybeDeserializedClass
 import org.jetbrains.kotlin.ir.descriptors.IrBasedSimpleFunctionDescriptor
 import org.jetbrains.kotlin.ir.descriptors.toIrBasedDescriptor
-import org.jetbrains.kotlin.ir.expressions.*
+import org.jetbrains.kotlin.ir.expressions.IrCall
+import org.jetbrains.kotlin.ir.expressions.IrConst
 import org.jetbrains.kotlin.ir.types.*
 import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.load.java.*
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/PromisedValue.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/PromisedValue.kt
index 7bb3e50b158..ed92da585cb 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/PromisedValue.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/PromisedValue.kt
@@ -5,8 +5,9 @@
 
 package org.jetbrains.kotlin.backend.jvm.codegen
 
+import org.jetbrains.kotlin.backend.jvm.InlineClassAbi
+import org.jetbrains.kotlin.backend.jvm.inlineClassFieldName
 import org.jetbrains.kotlin.backend.jvm.ir.eraseTypeParameters
-import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.*
 import org.jetbrains.kotlin.codegen.AsmUtil
 import org.jetbrains.kotlin.codegen.StackValue
 import org.jetbrains.kotlin.ir.declarations.IrTypeParameter
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/irCodegenUtils.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/irCodegenUtils.kt
index e57b1c0d5da..70d12aad248 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/irCodegenUtils.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/irCodegenUtils.kt
@@ -11,7 +11,7 @@ import org.jetbrains.kotlin.backend.common.ir.ir2string
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
 import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
 import org.jetbrains.kotlin.backend.jvm.JvmSymbols
-import org.jetbrains.kotlin.backend.jvm.lower.MultifileFacadeFileEntry
+import org.jetbrains.kotlin.backend.jvm.MultifileFacadeFileEntry
 import org.jetbrains.kotlin.builtins.StandardNames.FqNames
 import org.jetbrains.kotlin.builtins.jvm.JavaToKotlinClassMap
 import org.jetbrains.kotlin.codegen.*
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/ir/IrArrayBuilder.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/ir/IrArrayBuilder.kt
index 19211b548ce..698bac5ae4e 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/ir/IrArrayBuilder.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/ir/IrArrayBuilder.kt
@@ -5,7 +5,7 @@
 
 package org.jetbrains.kotlin.backend.jvm.ir
 
-import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.unboxInlineClass
+import org.jetbrains.kotlin.backend.jvm.unboxInlineClass
 import org.jetbrains.kotlin.ir.builders.*
 import org.jetbrains.kotlin.ir.expressions.IrConstructorCall
 import org.jetbrains.kotlin.ir.expressions.IrExpression
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/ir/JvmIrTypeUtils.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/ir/JvmIrTypeUtils.kt
index d1c8f08a2b1..b593b5b8dd8 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/ir/JvmIrTypeUtils.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/ir/JvmIrTypeUtils.kt
@@ -8,7 +8,7 @@ package org.jetbrains.kotlin.backend.jvm.ir
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
 import org.jetbrains.kotlin.backend.jvm.codegen.isJvmInterface
 import org.jetbrains.kotlin.backend.jvm.codegen.representativeUpperBound
-import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.unboxInlineClass
+import org.jetbrains.kotlin.backend.jvm.unboxInlineClass
 import org.jetbrains.kotlin.ir.declarations.IrClass
 import org.jetbrains.kotlin.ir.declarations.IrScript
 import org.jetbrains.kotlin.ir.declarations.IrTypeParameter
@@ -25,6 +25,7 @@ import org.jetbrains.kotlin.ir.types.impl.IrStarProjectionImpl
 import org.jetbrains.kotlin.ir.types.impl.makeTypeProjection
 import org.jetbrains.kotlin.ir.util.isLocal
 import org.jetbrains.kotlin.ir.util.render
+import org.jetbrains.kotlin.utils.addToStdlib.safeAs
 
 /**
  * Perform as much type erasure as is significant for JVM signature generation.
@@ -151,3 +152,6 @@ fun collectVisibleTypeParameters(scopeOwner: IrTypeParametersContainer): Set<IrT
     }
         .flatMap { it.typeParameters }
         .toSet()
+
+val IrType.isReifiedTypeParameter: Boolean
+    get() = classifierOrNull?.safeAs<IrTypeParameterSymbol>()?.owner?.isReified == true
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/ir/JvmIrUtils.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/ir/JvmIrUtils.kt
index 1ebdccc84d2..d4fbf8f8e35 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/ir/JvmIrUtils.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/ir/JvmIrUtils.kt
@@ -6,11 +6,14 @@
 package org.jetbrains.kotlin.backend.jvm.ir
 
 import org.jetbrains.kotlin.backend.common.ir.ir2string
+import org.jetbrains.kotlin.backend.common.lower.at
+import org.jetbrains.kotlin.backend.common.lower.irNot
 import org.jetbrains.kotlin.backend.jvm.CachedFieldsForObjectInstances
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
 import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
 import org.jetbrains.kotlin.backend.jvm.codegen.isInlineOnly
 import org.jetbrains.kotlin.backend.jvm.codegen.isJvmInterface
+import org.jetbrains.kotlin.codegen.ASSERTIONS_DISABLED_FIELD_NAME
 import org.jetbrains.kotlin.codegen.inline.coroutines.FOR_INLINE_SUFFIX
 import org.jetbrains.kotlin.config.JvmDefaultMode
 import org.jetbrains.kotlin.descriptors.ClassKind
@@ -21,11 +24,17 @@ import org.jetbrains.kotlin.descriptors.deserialization.PLATFORM_DEPENDENT_ANNOT
 import org.jetbrains.kotlin.ir.IrBuiltIns
 import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.PsiIrFileEntry
+import org.jetbrains.kotlin.ir.builders.IrBuilderWithScope
+import org.jetbrains.kotlin.ir.builders.declarations.buildField
 import org.jetbrains.kotlin.ir.builders.declarations.buildProperty
+import org.jetbrains.kotlin.ir.builders.irCall
+import org.jetbrains.kotlin.ir.builders.irExprBody
+import org.jetbrains.kotlin.ir.builders.irGet
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.declarations.lazy.IrLazyClass
 import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.expressions.impl.IrCallImpl
+import org.jetbrains.kotlin.ir.expressions.impl.IrClassReferenceImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrConstructorCallImpl
 import org.jetbrains.kotlin.ir.expressions.impl.IrGetFieldImpl
 import org.jetbrains.kotlin.ir.symbols.IrFunctionSymbol
@@ -41,8 +50,10 @@ import org.jetbrains.kotlin.load.java.JvmAbi
 import org.jetbrains.kotlin.metadata.jvm.deserialization.JvmProtoBufUtil
 import org.jetbrains.kotlin.name.JvmNames.JVM_DEFAULT_FQ_NAME
 import org.jetbrains.kotlin.name.JvmNames.JVM_DEFAULT_NO_COMPATIBILITY_FQ_NAME
+import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.resolve.DescriptorUtils
+import org.jetbrains.kotlin.utils.DFS
 import org.jetbrains.kotlin.utils.addToStdlib.safeAs
 
 fun IrDeclaration.getJvmNameFromAnnotation(): String? {
@@ -303,3 +314,84 @@ val IrDeclaration.inlineScopeVisibility: DescriptorVisibility?
 // True for declarations which are in the scope of an externally visible inline function.
 val IrDeclaration.isInPublicInlineScope: Boolean
     get() = inlineScopeVisibility?.let(DescriptorVisibilities::isPrivate) == false
+
+fun IrSimpleFunction.suspendFunctionOriginal(): IrSimpleFunction =
+    if (isSuspend &&
+        !isStaticInlineClassReplacement &&
+        !isOrOverridesDefaultParameterStub() &&
+        parentAsClass.origin != JvmLoweredDeclarationOrigin.DEFAULT_IMPLS
+    )
+        attributeOwnerId as IrSimpleFunction
+    else this
+
+fun IrFunction.suspendFunctionOriginal(): IrFunction =
+    (this as? IrSimpleFunction)?.suspendFunctionOriginal() ?: this
+
+private fun IrSimpleFunction.isOrOverridesDefaultParameterStub(): Boolean =
+    // Cannot use resolveFakeOverride here because of KT-36188.
+    DFS.ifAny(
+        listOf(this),
+        { it.overriddenSymbols.map(IrSimpleFunctionSymbol::owner) },
+        { it.origin == IrDeclarationOrigin.FUNCTION_FOR_DEFAULT_PARAMETER }
+    )
+
+fun IrClass.buildAssertionsDisabledField(backendContext: JvmBackendContext, topLevelClass: IrClass) =
+    factory.buildField {
+        name = Name.identifier(ASSERTIONS_DISABLED_FIELD_NAME)
+        origin = JvmLoweredDeclarationOrigin.GENERATED_ASSERTION_ENABLED_FIELD
+        visibility = JavaDescriptorVisibilities.PACKAGE_VISIBILITY
+        type = backendContext.irBuiltIns.booleanType
+        isFinal = true
+        isStatic = true
+    }.also { field ->
+        field.parent = this
+        field.initializer = backendContext.createJvmIrBuilder(this.symbol).run {
+            at(field)
+            irExprBody(irNot(irCall(irSymbols.desiredAssertionStatus).apply {
+                dispatchReceiver = javaClassReference(topLevelClass.defaultType)
+            }))
+        }
+    }
+
+fun IrField.isAssertionsDisabledField(context: JvmBackendContext) =
+    name.asString() == ASSERTIONS_DISABLED_FIELD_NAME && type == context.irBuiltIns.booleanType && isStatic
+
+fun IrClass.hasAssertionsDisabledField(context: JvmBackendContext) =
+    fields.any { it.isAssertionsDisabledField(context) }
+
+fun IrField.constantValue(): IrConst<*>? {
+    val value = initializer?.expression as? IrConst<*> ?: return null
+
+    // JVM has a ConstantValue attribute which does two things:
+    //   1. allows the field to be inlined into other modules;
+    //   2. implicitly generates an initialization of that field in <clinit>
+    // It is only allowed on final fields of primitive/string types. Java applies it whenever possible; Kotlin only applies it to
+    // `const val`s to avoid making values part of the library's ABI unless explicitly requested by the author.
+    val implicitConst = isFinal && isStatic && origin == IrDeclarationOrigin.IR_EXTERNAL_JAVA_DECLARATION_STUB
+    return if (implicitConst || correspondingPropertySymbol?.owner?.isConst == true) value else null
+}
+
+fun IrBuilderWithScope.kClassReference(classType: IrType): IrClassReference =
+    IrClassReferenceImpl(
+        startOffset, endOffset, context.irBuiltIns.kClassClass.starProjectedType, context.irBuiltIns.kClassClass, classType
+    )
+
+fun JvmIrBuilder.kClassToJavaClass(kClassReference: IrExpression): IrCall =
+    irGet(irSymbols.javaLangClass.starProjectedType, null, irSymbols.kClassJava.owner.getter!!.symbol).apply {
+        extensionReceiver = kClassReference
+    }
+
+fun JvmIrBuilder.javaClassReference(classType: IrType): IrCall =
+    kClassToJavaClass(kClassReference(classType))
+
+fun IrDeclarationParent.getCallableReferenceOwnerKClassType(context: JvmBackendContext): IrType =
+    if (this is IrClass) defaultType
+    else {
+        // For built-in members (i.e. top level `toString`) we generate reference to an internal class for an owner.
+        // This allows kotlin-reflect to understand that this is a built-in intrinsic which has no real declaration,
+        // and construct a special KCallable object.
+        context.ir.symbols.intrinsicsKotlinClass.defaultType
+    }
+
+fun IrDeclaration.getCallableReferenceTopLevelFlag(): Int =
+    if (parent.let { it is IrClass && it.isFileClass }) 1 else 0
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/AddContinuationLowering.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/AddContinuationLowering.kt
index ec7f5f0fa96..c1c3d00019d 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/AddContinuationLowering.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/AddContinuationLowering.kt
@@ -5,11 +5,14 @@
 
 package org.jetbrains.kotlin.backend.jvm.lower
 
-import org.jetbrains.kotlin.backend.common.*
+import org.jetbrains.kotlin.backend.common.FileLoweringPass
 import org.jetbrains.kotlin.backend.common.ir.*
 import org.jetbrains.kotlin.backend.common.lower.LocalDeclarationsLowering
 import org.jetbrains.kotlin.backend.common.lower.createIrBuilder
+import org.jetbrains.kotlin.backend.common.peek
 import org.jetbrains.kotlin.backend.common.phaser.makeIrFilePhase
+import org.jetbrains.kotlin.backend.common.pop
+import org.jetbrains.kotlin.backend.common.push
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
 import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
 import org.jetbrains.kotlin.backend.jvm.codegen.continuationParameter
@@ -17,7 +20,6 @@ import org.jetbrains.kotlin.backend.jvm.codegen.hasContinuation
 import org.jetbrains.kotlin.backend.jvm.codegen.isInvokeSuspendOfContinuation
 import org.jetbrains.kotlin.backend.jvm.codegen.isJvmInterface
 import org.jetbrains.kotlin.backend.jvm.ir.defaultValue
-import org.jetbrains.kotlin.backend.jvm.ir.isStaticInlineClassReplacement
 import org.jetbrains.kotlin.backend.jvm.localDeclarationsPhase
 import org.jetbrains.kotlin.codegen.coroutines.*
 import org.jetbrains.kotlin.codegen.inline.coroutines.FOR_INLINE_SUFFIX
@@ -29,10 +31,15 @@ import org.jetbrains.kotlin.ir.builders.*
 import org.jetbrains.kotlin.ir.builders.declarations.*
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.expressions.*
-import org.jetbrains.kotlin.ir.expressions.impl.*
+import org.jetbrains.kotlin.ir.expressions.impl.IrCallImpl
+import org.jetbrains.kotlin.ir.expressions.impl.IrFunctionReferenceImpl
+import org.jetbrains.kotlin.ir.expressions.impl.IrGetFieldImpl
+import org.jetbrains.kotlin.ir.expressions.impl.IrGetValueImpl
 import org.jetbrains.kotlin.ir.symbols.IrFunctionSymbol
 import org.jetbrains.kotlin.ir.symbols.IrSimpleFunctionSymbol
-import org.jetbrains.kotlin.ir.types.*
+import org.jetbrains.kotlin.ir.types.IrType
+import org.jetbrains.kotlin.ir.types.defaultType
+import org.jetbrains.kotlin.ir.types.typeWith
 import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformer
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
@@ -40,7 +47,6 @@ import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
 import org.jetbrains.kotlin.load.java.JavaDescriptorVisibilities
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.util.OperatorNameConventions
-import org.jetbrains.kotlin.utils.DFS
 import org.jetbrains.org.objectweb.asm.Type
 
 internal val addContinuationPhase = makeIrFilePhase(
@@ -380,26 +386,6 @@ private fun IrSimpleFunction.suspendFunctionViewOrStub(context: JvmBackendContex
     return context.suspendFunctionOriginalToView.getOrPut(this) { createSuspendFunctionStub(context) }
 }
 
-internal fun IrSimpleFunction.suspendFunctionOriginal(): IrSimpleFunction =
-    if (isSuspend &&
-        !isStaticInlineClassReplacement &&
-        !isOrOverridesDefaultParameterStub() &&
-        parentAsClass.origin != JvmLoweredDeclarationOrigin.DEFAULT_IMPLS
-    )
-        attributeOwnerId as IrSimpleFunction
-    else this
-
-internal fun IrFunction.suspendFunctionOriginal(): IrFunction =
-    (this as? IrSimpleFunction)?.suspendFunctionOriginal() ?: this
-
-private fun IrSimpleFunction.isOrOverridesDefaultParameterStub(): Boolean =
-    // Cannot use resolveFakeOverride here because of KT-36188.
-    DFS.ifAny(
-        listOf(this),
-        { it.overriddenSymbols.map { it.owner } },
-        { it.origin == IrDeclarationOrigin.FUNCTION_FOR_DEFAULT_PARAMETER }
-    )
-
 private fun IrSimpleFunction.createSuspendFunctionStub(context: JvmBackendContext): IrSimpleFunction {
     require(this.isSuspend)
     return factory.buildFun {
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/AssertionLowering.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/AssertionLowering.kt
index e12016cfa66..f0bd18c1b00 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/AssertionLowering.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/AssertionLowering.kt
@@ -11,15 +11,12 @@ import org.jetbrains.kotlin.backend.common.ir.inline
 import org.jetbrains.kotlin.backend.common.lower.*
 import org.jetbrains.kotlin.backend.common.phaser.makeIrFilePhase
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
-import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
-import org.jetbrains.kotlin.backend.jvm.ir.createJvmIrBuilder
+import org.jetbrains.kotlin.backend.jvm.ir.buildAssertionsDisabledField
 import org.jetbrains.kotlin.builtins.StandardNames
-import org.jetbrains.kotlin.codegen.ASSERTIONS_DISABLED_FIELD_NAME
 import org.jetbrains.kotlin.config.JVMAssertionsMode
 import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.IrStatement
 import org.jetbrains.kotlin.ir.builders.*
-import org.jetbrains.kotlin.ir.builders.declarations.buildField
 import org.jetbrains.kotlin.ir.declarations.IrClass
 import org.jetbrains.kotlin.ir.declarations.IrField
 import org.jetbrains.kotlin.ir.declarations.IrFile
@@ -27,10 +24,9 @@ import org.jetbrains.kotlin.ir.declarations.IrFunction
 import org.jetbrains.kotlin.ir.expressions.IrCall
 import org.jetbrains.kotlin.ir.expressions.IrExpression
 import org.jetbrains.kotlin.ir.expressions.impl.IrCompositeImpl
-import org.jetbrains.kotlin.ir.util.*
+import org.jetbrains.kotlin.ir.util.getPackageFragment
+import org.jetbrains.kotlin.ir.util.patchDeclarationParents
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformer
-import org.jetbrains.kotlin.load.java.JavaDescriptorVisibilities
-import org.jetbrains.kotlin.name.Name
 
 internal val assertionPhase = makeIrFilePhase(
     ::AssertionLowering,
@@ -119,29 +115,3 @@ private class AssertionLowering(private val context: JvmBackendContext) :
     private val IrFunction.isAssert: Boolean
         get() = name.asString() == "assert" && getPackageFragment()?.fqName == StandardNames.BUILT_INS_PACKAGE_FQ_NAME
 }
-
-fun IrClass.buildAssertionsDisabledField(backendContext: JvmBackendContext, topLevelClass: IrClass) =
-    factory.buildField {
-        name = Name.identifier(ASSERTIONS_DISABLED_FIELD_NAME)
-        origin = JvmLoweredDeclarationOrigin.GENERATED_ASSERTION_ENABLED_FIELD
-        visibility = JavaDescriptorVisibilities.PACKAGE_VISIBILITY
-        type = backendContext.irBuiltIns.booleanType
-        isFinal = true
-        isStatic = true
-    }.also { field ->
-        field.parent = this
-        field.initializer = backendContext.createJvmIrBuilder(this.symbol).run {
-            at(field)
-            irExprBody(irNot(irCall(irSymbols.desiredAssertionStatus).apply {
-                dispatchReceiver = with(FunctionReferenceLowering) {
-                    javaClassReference(topLevelClass.defaultType)
-                }
-            }))
-        }
-    }
-
-fun IrField.isAssertionsDisabledField(context: JvmBackendContext) =
-    name.asString() == ASSERTIONS_DISABLED_FIELD_NAME && type == context.irBuiltIns.booleanType && isStatic
-
-fun IrClass.hasAssertionsDisabledField(context: JvmBackendContext) =
-    fields.any { it.isAssertionsDisabledField(context) }
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/ConstLowering.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/ConstLowering.kt
index 32844719851..3a34752eaba 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/ConstLowering.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/ConstLowering.kt
@@ -8,7 +8,7 @@ package org.jetbrains.kotlin.backend.jvm.lower
 import org.jetbrains.kotlin.backend.common.FileLoweringPass
 import org.jetbrains.kotlin.backend.common.phaser.makeIrFilePhase
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
-import org.jetbrains.kotlin.ir.declarations.IrDeclarationOrigin
+import org.jetbrains.kotlin.backend.jvm.ir.constantValue
 import org.jetbrains.kotlin.ir.declarations.IrField
 import org.jetbrains.kotlin.ir.declarations.IrFile
 import org.jetbrains.kotlin.ir.declarations.IrSimpleFunction
@@ -37,18 +37,6 @@ internal val constPhase2 = makeIrFilePhase(
     description = "Substitute calls to const properties with constant values"
 )
 
-fun IrField.constantValue(): IrConst<*>? {
-    val value = initializer?.expression as? IrConst<*> ?: return null
-
-    // JVM has a ConstantValue attribute which does two things:
-    //   1. allows the field to be inlined into other modules;
-    //   2. implicitly generates an initialization of that field in <clinit>
-    // It is only allowed on final fields of primitive/string types. Java applies it whenever possible; Kotlin only applies it to
-    // `const val`s to avoid making values part of the library's ABI unless explicitly requested by the author.
-    val implicitConst = isFinal && isStatic && origin == IrDeclarationOrigin.IR_EXTERNAL_JAVA_DECLARATION_STUB
-    return if (implicitConst || correspondingPropertySymbol?.owner?.isConst == true) value else null
-}
-
 class ConstLowering(val context: JvmBackendContext) : IrElementTransformerVoid(), FileLoweringPass {
     val inlineConstTracker =
         context.state.configuration[CommonConfigurationKeys.INLINE_CONST_TRACKER] ?: InlineConstTracker.DoNothing
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/EnumClassLowering.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/EnumClassLowering.kt
index ce05aa1836d..1f7ebfe0ebd 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/EnumClassLowering.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/EnumClassLowering.kt
@@ -16,6 +16,7 @@ import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
 import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
 import org.jetbrains.kotlin.backend.jvm.ir.createJvmIrBuilder
 import org.jetbrains.kotlin.backend.jvm.ir.irArray
+import org.jetbrains.kotlin.backend.jvm.ir.javaClassReference
 import org.jetbrains.kotlin.codegen.ImplementationBodyCodegen
 import org.jetbrains.kotlin.descriptors.DescriptorVisibilities
 import org.jetbrains.kotlin.ir.IrStatement
@@ -32,7 +33,10 @@ import org.jetbrains.kotlin.ir.expressions.impl.IrSetValueImpl
 import org.jetbrains.kotlin.ir.symbols.IrConstructorSymbol
 import org.jetbrains.kotlin.ir.symbols.IrValueParameterSymbol
 import org.jetbrains.kotlin.ir.types.typeWith
-import org.jetbrains.kotlin.ir.util.*
+import org.jetbrains.kotlin.ir.util.defaultType
+import org.jetbrains.kotlin.ir.util.isEnumClass
+import org.jetbrains.kotlin.ir.util.isEnumEntry
+import org.jetbrains.kotlin.ir.util.patchDeclarationParents
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid
 import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
 import org.jetbrains.kotlin.name.Name
@@ -161,9 +165,7 @@ private class EnumClassLowering(val context: JvmBackendContext) : ClassLoweringP
 
                             IrSyntheticBodyKind.ENUM_VALUEOF ->
                                 irCall(backendContext.ir.symbols.enumValueOfFunction).apply {
-                                    putValueArgument(0, with(FunctionReferenceLowering) {
-                                        javaClassReference(irClass.defaultType)
-                                    })
+                                    putValueArgument(0, javaClassReference(irClass.defaultType))
                                     putValueArgument(1, irGet(declaration.valueParameters[0]))
                                 }
                         }
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/FunctionReferenceLowering.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/FunctionReferenceLowering.kt
index 7d770d26ba6..b5744275ab2 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/FunctionReferenceLowering.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/FunctionReferenceLowering.kt
@@ -641,7 +641,7 @@ internal class FunctionReferenceLowering(private val context: JvmBackendContext)
         }
 
         private fun getFunctionReferenceFlags(callableReferenceTarget: IrFunction): Int {
-            val isTopLevelBit = getCallableReferenceTopLevelFlag(callableReferenceTarget)
+            val isTopLevelBit = callableReferenceTarget.getCallableReferenceTopLevelFlag()
             val adaptedCallableReferenceFlags = getAdaptedCallableReferenceFlags()
             return isTopLevelBit + (adaptedCallableReferenceFlags shl 1)
         }
@@ -804,19 +804,6 @@ internal class FunctionReferenceLowering(private val context: JvmBackendContext)
     }
 
     companion object {
-        private fun IrBuilderWithScope.kClassReference(classType: IrType) =
-            IrClassReferenceImpl(
-                startOffset, endOffset, context.irBuiltIns.kClassClass.starProjectedType, context.irBuiltIns.kClassClass, classType
-            )
-
-        internal fun JvmIrBuilder.kClassToJavaClass(kClassReference: IrExpression) =
-            irGet(irSymbols.javaLangClass.starProjectedType, null, irSymbols.kClassJava.owner.getter!!.symbol).apply {
-                extensionReceiver = kClassReference
-            }
-
-        internal fun JvmIrBuilder.javaClassReference(classType: IrType) =
-            kClassToJavaClass(kClassReference(classType))
-
         internal fun JvmIrBuilder.calculateOwner(irContainer: IrDeclarationParent): IrExpression {
             val kClass = calculateOwnerKClass(irContainer)
 
@@ -833,21 +820,6 @@ internal class FunctionReferenceLowering(private val context: JvmBackendContext)
         }
 
         internal fun JvmIrBuilder.calculateOwnerKClass(irContainer: IrDeclarationParent): IrExpression =
-            kClassReference(getOwnerKClassType(irContainer, backendContext))
-
-        internal fun getOwnerKClassType(irContainer: IrDeclarationParent, context: JvmBackendContext): IrType =
-            if (irContainer is IrClass) irContainer.defaultType
-            else {
-                // For built-in members (i.e. top level `toString`) we generate reference to an internal class for an owner.
-                // This allows kotlin-reflect to understand that this is a built-in intrinsic which has no real declaration,
-                // and construct a special KCallable object.
-                context.ir.symbols.intrinsicsKotlinClass.defaultType
-            }
-
-        internal fun getCallableReferenceTopLevelFlag(declaration: IrDeclaration): Int =
-            if (isCallableReferenceTopLevel(declaration)) 1 else 0
-
-        internal fun isCallableReferenceTopLevel(declaration: IrDeclaration): Boolean =
-            declaration.parent.let { it is IrClass && it.isFileClass }
+            kClassReference(irContainer.getCallableReferenceOwnerKClassType(backendContext))
     }
 }
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/GenerateMultifileFacades.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/GenerateMultifileFacades.kt
index 52cd3261120..0c8990cd1dd 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/GenerateMultifileFacades.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/GenerateMultifileFacades.kt
@@ -16,13 +16,16 @@ import org.jetbrains.kotlin.backend.common.lower.createIrBuilder
 import org.jetbrains.kotlin.backend.common.phaser.makeCustomPhase
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
 import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
+import org.jetbrains.kotlin.backend.jvm.MultifileFacadeFileEntry
 import org.jetbrains.kotlin.backend.jvm.codegen.fileParent
 import org.jetbrains.kotlin.backend.jvm.ir.getKtFile
+import org.jetbrains.kotlin.backend.jvm.isMultifileBridge
 import org.jetbrains.kotlin.config.JvmAnalysisFlags
 import org.jetbrains.kotlin.descriptors.DescriptorVisibilities
 import org.jetbrains.kotlin.descriptors.Modality
 import org.jetbrains.kotlin.descriptors.impl.EmptyPackageFragmentDescriptor
-import org.jetbrains.kotlin.ir.*
+import org.jetbrains.kotlin.ir.IrElement
+import org.jetbrains.kotlin.ir.IrStatement
 import org.jetbrains.kotlin.ir.builders.*
 import org.jetbrains.kotlin.ir.builders.declarations.addConstructor
 import org.jetbrains.kotlin.ir.builders.declarations.buildClass
@@ -42,7 +45,6 @@ import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
 import org.jetbrains.kotlin.load.java.JavaDescriptorVisibilities
 import org.jetbrains.kotlin.name.JvmNames.JVM_SYNTHETIC_ANNOTATION_FQ_NAME
 import org.jetbrains.kotlin.resolve.inline.INLINE_ONLY_ANNOTATION_FQ_NAME
-import org.jetbrains.kotlin.resolve.jvm.JvmClassName
 import org.jetbrains.kotlin.resolve.jvm.diagnostics.ErrorsJvm
 
 internal val generateMultifileFacadesPhase = makeCustomPhase<JvmBackendContext, IrModuleFragment>(
@@ -68,26 +70,6 @@ internal val generateMultifileFacadesPhase = makeCustomPhase<JvmBackendContext,
     }
 )
 
-class MultifileFacadeFileEntry(
-    private val className: JvmClassName,
-    val partFiles: List<IrFile>
-) : IrFileEntry {
-    override val name: String
-        get() = "<multi-file facade $className>"
-
-    override val maxOffset: Int
-        get() = UNDEFINED_OFFSET
-
-    override fun getSourceRangeInfo(beginOffset: Int, endOffset: Int): SourceRangeInfo =
-        error("Multifile facade doesn't support debug info: $className")
-
-    override fun getLineNumber(offset: Int): Int =
-        error("Multifile facade doesn't support debug info: $className")
-
-    override fun getColumnNumber(offset: Int): Int =
-        error("Multifile facade doesn't support debug info: $className")
-}
-
 private fun generateMultifileFacades(
     module: IrModuleFragment,
     context: JvmBackendContext,
@@ -376,6 +358,3 @@ private class UpdateConstantFacadePropertyReferences(
         ) facadeClass else null
     }
 }
-
-internal fun IrFunction.isMultifileBridge(): Boolean =
-    (parent as? IrClass)?.origin == IrDeclarationOrigin.JVM_MULTIFILE_CLASS
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmAnnotationImplementationTransformer.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmAnnotationImplementationTransformer.kt
index a73db7628fd..16dfbe87b30 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmAnnotationImplementationTransformer.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmAnnotationImplementationTransformer.kt
@@ -12,7 +12,7 @@ import org.jetbrains.kotlin.backend.common.phaser.makeIrFilePhase
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
 import org.jetbrains.kotlin.backend.jvm.ir.createJvmIrBuilder
 import org.jetbrains.kotlin.backend.jvm.ir.isInPublicInlineScope
-import org.jetbrains.kotlin.backend.jvm.lower.FunctionReferenceLowering.Companion.javaClassReference
+import org.jetbrains.kotlin.backend.jvm.ir.javaClassReference
 import org.jetbrains.kotlin.ir.builders.*
 import org.jetbrains.kotlin.ir.builders.declarations.addFunction
 import org.jetbrains.kotlin.ir.declarations.IrClass
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmDefaultConstructorLowering.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmDefaultConstructorLowering.kt
index c0216c8bbff..8300cadb40d 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmDefaultConstructorLowering.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmDefaultConstructorLowering.kt
@@ -11,7 +11,7 @@ import org.jetbrains.kotlin.backend.common.ir.passTypeArgumentsFrom
 import org.jetbrains.kotlin.backend.common.lower.createIrBuilder
 import org.jetbrains.kotlin.backend.common.phaser.makeIrFilePhase
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
-import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.hasMangledParameters
+import org.jetbrains.kotlin.backend.jvm.hasMangledParameters
 import org.jetbrains.kotlin.descriptors.ClassKind
 import org.jetbrains.kotlin.descriptors.DescriptorVisibilities
 import org.jetbrains.kotlin.descriptors.Modality
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmInlineClassLowering.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmInlineClassLowering.kt
index 5a3fbb363c6..88ff474aa0f 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmInlineClassLowering.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmInlineClassLowering.kt
@@ -15,9 +15,7 @@ import org.jetbrains.kotlin.backend.common.lower.loops.forLoopsPhase
 import org.jetbrains.kotlin.backend.common.phaser.makeIrFilePhase
 import org.jetbrains.kotlin.backend.common.pop
 import org.jetbrains.kotlin.backend.common.push
-import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
-import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
-import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.*
+import org.jetbrains.kotlin.backend.jvm.*
 import org.jetbrains.kotlin.builtins.StandardNames
 import org.jetbrains.kotlin.config.ApiVersion
 import org.jetbrains.kotlin.descriptors.DescriptorVisibilities
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmPropertiesLowering.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmPropertiesLowering.kt
index f44f9706366..f732d7303b5 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmPropertiesLowering.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmPropertiesLowering.kt
@@ -11,10 +11,10 @@ import org.jetbrains.kotlin.backend.common.ir.copyTo
 import org.jetbrains.kotlin.backend.common.lower.createIrBuilder
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
 import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
+import org.jetbrains.kotlin.backend.jvm.hasMangledReturnType
 import org.jetbrains.kotlin.backend.jvm.ir.eraseTypeParameters
 import org.jetbrains.kotlin.backend.jvm.ir.needsAccessor
-import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.hasMangledReturnType
-import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.requiresMangling
+import org.jetbrains.kotlin.backend.jvm.requiresMangling
 import org.jetbrains.kotlin.config.LanguageFeature
 import org.jetbrains.kotlin.descriptors.ClassKind
 import org.jetbrains.kotlin.descriptors.Modality
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmStringConcatenationLowering.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmStringConcatenationLowering.kt
index 0d9a92dbc6a..7e39e25289c 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmStringConcatenationLowering.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmStringConcatenationLowering.kt
@@ -11,10 +11,10 @@ import org.jetbrains.kotlin.backend.common.lower.FlattenStringConcatenationLower
 import org.jetbrains.kotlin.backend.common.lower.flattenStringConcatenationPhase
 import org.jetbrains.kotlin.backend.common.lower.loops.forLoopsPhase
 import org.jetbrains.kotlin.backend.common.phaser.makeIrFilePhase
+import org.jetbrains.kotlin.backend.jvm.InlineClassAbi
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
 import org.jetbrains.kotlin.backend.jvm.ir.JvmIrBuilder
 import org.jetbrains.kotlin.backend.jvm.ir.createJvmIrBuilder
-import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.InlineClassAbi
 import org.jetbrains.kotlin.ir.builders.*
 import org.jetbrains.kotlin.ir.declarations.IrClass
 import org.jetbrains.kotlin.ir.declarations.IrFile
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/PropertyReferenceLowering.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/PropertyReferenceLowering.kt
index 104d9afeec8..613cb2b52fe 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/PropertyReferenceLowering.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/PropertyReferenceLowering.kt
@@ -12,16 +12,11 @@ import org.jetbrains.kotlin.backend.common.ir.copyTo
 import org.jetbrains.kotlin.backend.common.ir.createImplicitParameterDeclarationWithWrappedDescriptor
 import org.jetbrains.kotlin.backend.common.lower.createIrBuilder
 import org.jetbrains.kotlin.backend.common.phaser.makeIrFilePhase
-import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
-import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
+import org.jetbrains.kotlin.backend.jvm.*
 import org.jetbrains.kotlin.backend.jvm.codegen.parentClassId
 import org.jetbrains.kotlin.backend.jvm.ir.*
 import org.jetbrains.kotlin.backend.jvm.lower.FunctionReferenceLowering.Companion.calculateOwner
 import org.jetbrains.kotlin.backend.jvm.lower.FunctionReferenceLowering.Companion.calculateOwnerKClass
-import org.jetbrains.kotlin.backend.jvm.lower.FunctionReferenceLowering.Companion.kClassToJavaClass
-import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.InlineClassAbi
-import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.hasMangledReturnType
-import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.isInlineClassFieldGetter
 import org.jetbrains.kotlin.codegen.inline.loadCompiledInlineFunction
 import org.jetbrains.kotlin.codegen.optimization.nullCheck.usesLocalExceptParameterNullCheck
 import org.jetbrains.kotlin.descriptors.DescriptorVisibilities
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/ResolveInlineCalls.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/ResolveInlineCalls.kt
index b077900832c..47b84a47b65 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/ResolveInlineCalls.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/ResolveInlineCalls.kt
@@ -9,6 +9,7 @@ import org.jetbrains.kotlin.backend.common.FileLoweringPass
 import org.jetbrains.kotlin.backend.common.phaser.makeIrModulePhase
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
 import org.jetbrains.kotlin.backend.jvm.codegen.isInlineFunctionCall
+import org.jetbrains.kotlin.backend.jvm.isMultifileBridge
 import org.jetbrains.kotlin.ir.declarations.IrFile
 import org.jetbrains.kotlin.ir.declarations.IrFunction
 import org.jetbrains.kotlin.ir.declarations.IrSimpleFunction
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/StaticInitializersLowering.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/StaticInitializersLowering.kt
index f3c5638f459..30ed28f8dc6 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/StaticInitializersLowering.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/StaticInitializersLowering.kt
@@ -9,6 +9,7 @@ import org.jetbrains.kotlin.backend.common.ClassLoweringPass
 import org.jetbrains.kotlin.backend.common.lower.InitializersLoweringBase
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
 import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
+import org.jetbrains.kotlin.backend.jvm.ir.constantValue
 import org.jetbrains.kotlin.ir.builders.declarations.addFunction
 import org.jetbrains.kotlin.ir.declarations.IrAnonymousInitializer
 import org.jetbrains.kotlin.ir.declarations.IrClass
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/SyntheticAccessorLowering.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/SyntheticAccessorLowering.kt
index 1b960aff094..243964978c2 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/SyntheticAccessorLowering.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/SyntheticAccessorLowering.kt
@@ -13,9 +13,10 @@ import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
 import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
 import org.jetbrains.kotlin.backend.jvm.codegen.fileParent
 import org.jetbrains.kotlin.backend.jvm.codegen.isJvmInterface
+import org.jetbrains.kotlin.backend.jvm.hasMangledParameters
 import org.jetbrains.kotlin.backend.jvm.intrinsics.receiverAndArgs
 import org.jetbrains.kotlin.backend.jvm.ir.IrInlineReferenceLocator
-import org.jetbrains.kotlin.backend.jvm.lower.inlineclasses.hasMangledParameters
+import org.jetbrains.kotlin.backend.jvm.ir.isAssertionsDisabledField
 import org.jetbrains.kotlin.codegen.AsmUtil
 import org.jetbrains.kotlin.descriptors.DescriptorVisibilities
 import org.jetbrains.kotlin.descriptors.DescriptorVisibility
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/TypeOperatorLowering.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/TypeOperatorLowering.kt
index c6705811373..470b4b38016 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/TypeOperatorLowering.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/TypeOperatorLowering.kt
@@ -14,10 +14,7 @@ import org.jetbrains.kotlin.backend.common.phaser.makeIrFilePhase
 import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
 import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
 import org.jetbrains.kotlin.backend.jvm.codegen.fileParent
-import org.jetbrains.kotlin.backend.jvm.ir.createJvmIrBuilder
-import org.jetbrains.kotlin.backend.jvm.ir.erasedUpperBound
-import org.jetbrains.kotlin.backend.jvm.ir.getKtFile
-import org.jetbrains.kotlin.backend.jvm.ir.isInlineClassType
+import org.jetbrains.kotlin.backend.jvm.ir.*
 import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
 import org.jetbrains.kotlin.ir.builders.*
@@ -28,7 +25,6 @@ import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.expressions.impl.IrCompositeImpl
 import org.jetbrains.kotlin.ir.symbols.IrFunctionSymbol
 import org.jetbrains.kotlin.ir.symbols.IrSimpleFunctionSymbol
-import org.jetbrains.kotlin.ir.symbols.IrTypeParameterSymbol
 import org.jetbrains.kotlin.ir.types.*
 import org.jetbrains.kotlin.ir.util.defaultType
 import org.jetbrains.kotlin.ir.util.dump
@@ -58,9 +54,6 @@ internal val typeOperatorLowering = makeIrFilePhase(
     description = "Lower IrTypeOperatorCalls to (implicit) casts and instanceof checks"
 )
 
-val IrType.isReifiedTypeParameter: Boolean
-    get() = classifierOrNull?.safeAs<IrTypeParameterSymbol>()?.owner?.isReified == true
-
 private class TypeOperatorLowering(private val context: JvmBackendContext) : FileLoweringPass, IrBuildingTransformer(context) {
     override fun lower(irFile: IrFile) = irFile.transformChildrenVoid()